JP5871588B2 - Equipment with fine bubble generation function - Google Patents

Description

  The present invention relates to a device with a function of generating fine bubbles, such as a bath device having a function of generating fine bubbles in a water tank such as a bathtub.

  A bubble generator that generates bubbles in the bath water is used. Among them, by discharging very fine bubbles from the bubble generator into the bathtub water, Therefore, there is an increasing demand for a bath apparatus with a fine bubble generation function that generates fine bubbles (for example, bubble diameters of several microns to several tens of microns) that appear cloudy. It is said that the generation of fine bubbles (white turbidity type) in the bathtub has the effect of improving the heat retention of the bather and making it easier to remove dirt, and the user sends a comfortable bathing time. (For example, refer to Patent Document 1).

  In order to generate fine bubbles in the bathtub water, conventionally, for example, a recirculation circuit connected to the bathtub and a fine bubble generation function circuit are divided, and a centrifugal pump is provided for each, and these are used properly. It had the function of generating fine bubbles and the function of reheating bath water. In addition, the fine bubble generation functional circuit is provided with a pressurized container for pressurizing and dissolving air in the water (tub water) passing through the fine bubble generation functional circuit, and the dissolved air is ejected into the bathtub as fine bubbles. I was letting.

Japanese Patent No. 2512952

  However, it is necessary to install another pump in order to provide the fine bubble generation function if only the reheating function is provided without providing the fine bubble generation function. Therefore, since an arrangement space is required, there is a problem that it is difficult to reduce the size and cost of the bath apparatus.

  On the other hand, as an example of the pressurized container, as shown in FIG. 48A, water (hot water) that is pressurized and introduced into the tank 31 from the upper side of the tank 31 is supplied to the water inlet 32. A configuration has been proposed in which water is stirred while being applied to a member 99 provided in the vicinity. In this configuration, sound (crushing sound) generated by applying water to the target member 99 in the air layer is proposed. In addition, when the pressure vessel is downsized to reduce the size and cost of the bath apparatus having the function of generating fine bubbles, it is injected into the tank 31 as shown in FIG. When the water is stirred too vigorously and just pouring carbonated water into the cup vigorously, bubbles will come to the edge of the cup (the tank 31 will be filled with foam), but when carbonated water is poured from above the foam, Bubbles of carbonated water newly poured on the foam shape As will be problems such air layer is not formed is generated in the tank 31.

  Thus, if an air layer of undissolved air is not formed in the tank 31 (unless the bubbles are not filled in the tank 31), the amount of undissolved air in the tank necessary for continuous generation of fine bubbles is measured. It becomes difficult to obtain an appropriate function for generating fine bubbles. In order to discharge fine bubbles into the bathtub, for example, a fine bubble ejection device (for example, also serving as a circulation fitting) is provided at a portion of the passage where the tank 31 is provided to the bathtub. When the amount of air sucked into the air is large, undissolved air in the tank 31 is blown out as large bubbles from the fine bubble blowing device. As a result, the white turbidity is deteriorated and a loud sound is produced, which is uncomfortable. Conversely, if the amount of air to be sucked is small, the undissolved air in the tank will be insufficient, and it will not be possible to dissolve enough air to make the water cloudy. As a result, it will not become sufficiently cloudy.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to dissolve an appropriate amount of air in water poured into a pressurized container, thereby providing a good function of generating fine bubbles. Another object of the present invention is to provide a device with a function of generating fine bubbles, such as a bath device that can be downsized and reduced in price.

In order to achieve the above object, the present invention provides means for solving the problems with the following configuration. That is, the first invention has a pressurized container into which water or water containing air is introduced under pressure, and the pressurized container has a tank for storing the water introduced into the pressurized container while stirring. , and a water inlet and water outlet, wherein the inlet side of the water to the pressure vessel is connected input side conduit connected to the bathtub, the outlet of the pressurized vessel of water the side and forms a structure in which the outlet side conduit connected to the bath tub is connected, before entry side conduit is interposed and the air inlet valve and the pump, the pump is the air inlet valve in the closed state through the entering-side conduit of the bath water from the bath feed to the pressurized vessel side, the inlet before entry side conduit from the outside through the air inlet valve in the open state of the air introduction valve has a configuration to send the said air bath water which is in the pressurized vessel side, the while stirring the bath water introduced into the pressurized vessel with the tank By storing, said tank non dissolved air which could not be dissolved with is dissolved at least one of the air delivered to the pressure vessel from a non-dissolved air and the pump in the tank the bath water in the tank And forming an air layer of the undissolved air in the tank separately from the bathtub water, and only the bathtub water in which air is dissolved is derived from the water outlet and the undissolved air is not derived. A reheating heat exchanger for reheating the bathtub water is interposed in the outlet side conduit, and the reheating heat exchanger, the outlet side conduit, and the inlet side conduit A recirculation path is formed, and the pump is driven to pass the bathtub water through the inlet side pipe, the pressurized container, and the outlet side pipe in order, and returns to the bathtub. has a function of circulating the fired circulating path, said exit-side conduit Others in the connecting portion between the tub and said output-side conduit, thereby ejecting the bath water air is dissolved in the water in the water or the bath tank of the outlet side conduit by the pressurized vessel the bath tub water into fine bubbles jetting apparatus for jetting the fine bubbles in is provided, within the fine bubbles jetting device, a nozzle for fine bubble generation, was circulated through the reheating circulation path by A flow path for generating fine bubbles in which water in which air is dissolved is jetted into the water through the nozzle and the water in which the air is dissolved in the water without passing through the nozzle. A follow-up flow channel to be led out, and a flow rate corresponding on-off valve that closes when the flow rate is equal to or higher than a set flow rate according to the flow rate of water introduced into the fine bubble ejection device, and ejects fine bubbles into the bathtub. Control of the pump during operation By setting the flow rate of water introduced into the fine bubble jetting device to be equal to or higher than the set flow rate, the bath water is jetted into the water through the fine bubble generating channel so that the flow rate corresponding on-off valve is closed. The fine bubbles are controlled by the pump during the reheating single operation in which the water circulating through the recirculation circulation path is heated by the reheating heat exchanger without performing the operation of ejecting the fine bubbles into the bathtub. With a configuration having pump drive control means for setting the flow rate of water introduced into the ejection device to less than the set flow rate and opening the flow rate corresponding on-off valve to lead the bath water into the water through the reflow channel. As a means to solve the problem.

Furthermore, the second invention has a pressurized container into which water or water containing air is introduced under pressure, and the pressurized container is a tank for storing the water introduced into the pressurized container while stirring. A water inlet and a water outlet, and an inlet side pipe connected to the bathtub is connected to the water inlet side of the pressurized container, and the water outlet side of the pressurized container The outlet side pipe connected to the bathtub is connected to the inlet side pipe, and the inlet side pipe is provided with an air introduction valve and a pump, and the pump closes the air introduction valve. In the state, the bathtub water from the bathtub is sent to the pressurized container side through the inlet side pipe line, and in the open state of the air introduction valve, the air introduced from the outside to the inlet side pipe line through the air introduction valve And the bathtub water to the pressurized container side, while stirring the bathtub water introduced into the pressurized container in the tank To dissolve at least one of undissolved air in the tank and air sent from the pump to the pressurized container in the bath water in the tank and undissolved air that has not been completely dissolved in the tank. And forming an air layer of the undissolved air in the tank separately from the bathtub water, and only the bathtub water in which air is dissolved is derived from the water outlet and the undissolved air is not derived. A reheating heat exchanger for reheating the bathtub water is interposed in the outlet side conduit, and the reheating heat exchanger, the outlet side conduit, and the inlet side conduit A recirculation path is formed, and the pump is driven to pass the bathtub water through the inlet side pipe, the pressurized container, and the outlet side pipe in order, and returns to the bathtub. It has the function of circulating in the circulation circuit, In the connecting part between the outlet side pipe and the bathtub, the bathtub water in which air is dissolved by the pressurized container is jetted into the water in the outlet side pipe or the water in the bathtub. A fine bubble jetting device for jetting fine bubbles into water in the bathtub is provided. In the fine bubble jetting device, a nozzle for generating fine bubbles and air circulating through the recirculation circulation path are dissolved. A fine bubble generating flow path for generating fine bubbles in the water by ejecting the generated water into the water through the nozzle, and a follow-up for discharging the water in which the air is dissolved into the water without passing through the nozzle. A reheating channel is provided, and a reheating operation for heating the bathtub water circulating through the recirculation circulation path by the reheating heat exchanger and a spraying operation of fine bubbles into the bathtub are simultaneously performed. Simultaneous operation to be performed In the reheating heat exchanger, water introduced into the reheating heat exchanger is heated in the reheating heat exchanger, and the outlet pipe on the downstream side of the flow of water from the reheating heat exchanger. The pressure of the water is increased so as not to form a gas-liquid two-phase mixed flow in the channel, and the water is ejected into the water through the fine bubble generating flow path, and fine bubbles are ejected into the bathtub. When the reheating operation is performed without performing the operation, the water pressure is lowered and the water is recirculated without performing the water pressure increasing operation by the pump performed during the simultaneous operation. It has a structure to be guided to the water through the road that has a means for solving the problems.

Furthermore, the third invention, the first or in addition to the second aspect of the invention, the fine from the fine bubble jet device without heating the tub water reheating heat exchanger to circulate through the reheating circulation path The function of the single bubble jet operation that performs the bubble jet operation into the bathtub, and the hot water exchanger that circulates the bathtub water in the circulation circuit without performing the jet operation of the fine bubble into the bathtub The function of the reheating single operation for replenishing the water by the reheating operation, the reheating operation for recirculating the water in the recirculation circulation path and replenishing the water by the reheating heat exchanger, and the bathtub with fine bubbles and wherein the Turkey which have a the function of co-operation between the gas jetting operation to the inner.

Further, the fourth invention is a water level detection means for detecting the water level of the stored water stored in the pressurization container in the pressurization container in addition to the configuration of any one of the first to third inventions. When the detected water level exceeds the set high reference water level based on the detection result of the water level detecting means provided in the pressurized container, the air introduction valve is opened to introduce air into the inlet passage from the outside. The volume of the undissolved air air layer between the water surface of the stored water in the pressurized container and the upper end of the container is increased by sending the air together with water to the pressurized container by the pump. When the water level is lower than the set high reference water level and the detected water level is lower than the set low reference water level, the air introduction valve is closed and water is sent to the pressurized container by the pump, and the air layer of the undissolved air in the water The air by dissolving the air To reduce the volume, characterized in Rukoto to have a air inlet valve opening and closing control means for opening and closing control of the air inlet valve to the water level of the stored water above the preset low reference water level.

Further, the fifth invention is the configuration of any one of the first to fourth inventions, wherein a remote control device is signal-connected to the device with the fine bubble generating function, and the fine bubble generation is connected to the remote control device. A fine bubble generation operation section for turning on and off the fine bubble ejection operation of the function-equipped device is provided.

  According to the present invention, a pump and an air introduction valve are provided in an inlet line provided on the water introduction side of the pressurized container, and the pump sends water to the pressurized container side in a closed state of the air introduction valve, In the open state of the air introduction valve, water and air introduced from the outside to the inlet side pipe line through the air introduction valve are sent to the pressurized container side, and the air sent by the pump and the tank of the pressurized container The remaining undissolved air is dissolved in the water in the tank by the pressurized container, and at least one of the undissolved air in the tank and the air sent from the pump to the pressurized container is dissolved in the bath water in the tank. Since the undissolved air that could not be dissolved is separated and an air layer of the undissolved air is formed in the tank, it can be appropriately detected by providing, for example, a water level detecting means in the pressurized container. Therefore, it becomes easy to measure the amount of air dissolved in the water, an appropriate function for generating fine bubbles can be obtained, and when fine bubbles are ejected from the fine bubble ejection device, the fine bubbles are generated well. be able to.

  Further, since only the water in which the air is dissolved is derived from the water outlet of the pressurized container and the undissolved air is not derived, the structure in which the undissolved air is derived from the tank. In other words, the undissolved air in the tank is blown out as a large bubble from a device that injects fine bubbles into the water in a water tank such as a bathtub or the outlet side of a pressurized container. It is possible to avoid the point that the turbidity of the water to be ejected deteriorates or the sound is loud and the user is uncomfortable.

  Further, the pressurized container provided in the present invention is provided with a water level detecting means, and based on the detection result of the water level detecting means, when the water level exceeds the set high reference water level, the air introduction valve is opened to externally Introducing air into the inlet passage, and sending the air to the pressurized container together with the bath water by a pump to increase the volume of the air layer of undissolved air to make the water level of the stored water below the set high reference water level, When the detected water level becomes lower than a set low reference water level, the air introduction valve is closed, water is sent to the pressurized container by the pump, and the undissolved air is dissolved in the water by dissolving the air in the air layer. By reducing the volume of the dissolved air layer and setting the water level of the stored water above the set low reference water level, the amount (volume) of the undissolved air layer in the pressurized container can always be made appropriate. Additional melting Proportion can be appropriate.

Further, the fine bubble generating function device of the present invention, a bath apparatus der provided with a pressurized container having the features as described above in the connected Reheating circulation path bath is, water or water and air by the pump As the configuration to send to the pressurized container can generate good fine bubbles to the bathtub, separate the recirculation circuit and fine bubble generation function circuit, and provide a centrifugal pump for each, compared to the configuration to use these separately, The device configuration can be simplified, and the bath device with the function of generating fine bubbles can be reduced in size and price. In addition, since excellent fine bubbles can be generated in the bathtub as described above, an excellent bath apparatus that can be used very comfortably can be realized.

The pressurized container has a tank that separates and stores the water to be introduced and air that is not dissolved in the water, and stirs the water introduced into the pressurized container (tub water) in the tank. However, the undissolved air that could not be dissolved is separated from the bathtub water to form an air layer of the undissolved air in the tank. Since only water in which air is dissolved is led out from the water outlet and the undissolved air is not led out, the following effects can be obtained.

  In other words, in a bath apparatus, when water in a state where air is contained in the form of bubbles in water is introduced into a reheating heat exchanger generally formed of copper, rust is generated in the reheating heat exchanger. (Gas-liquid two-phase flow accelerated corrosion) and cracks (hydroelastic vibration stress corrosion cracking due to gas-liquid two-phase flow) may occur. A pump is provided (in other words, a pressurized container is provided on the downstream side of the pump). Water and undissolved air are separated from the water by the pressurized container, and the separated undissolved air is discharged. In order to prevent this, the water is dissolved in the water and the air is sufficiently absorbed in the water (without bubbles). It is possible to prevent problems such as rust and cracks in the reheating heat exchanger. Moreover, after heating the water, it is not easy to dissolve the air in the water. However, in the bath apparatus to which the present invention is applied, after the air is dissolved in the low-temperature water that is easy to dissolve the air, it is followed. Since it will be heated in a soaking heat exchanger, it is possible to increase the amount of air dissolved in the same amount of water by dissolving the air and then raising it to the same temperature rather than dissolving the air in the heated water. It is possible to easily increase the air solubility (relative solubility).

Furthermore, the bath apparatus to which the present invention is applied has a common operation of the fine bubble generation circuit and the recirculation circuit, so that the single operation of fine bubble injection (the operation of injecting fine bubbles into the bathtub without reheating) ) In addition to the single operation of the chasing (the operation of performing the chasing operation without performing the jetting operation into the bathtub ) , the simultaneous operation of the jetting operation of the fine bubbles into the bathtub and the chasing operation can be selected. Become. During the simultaneous operation, the water introduced into the reheating heat exchanger is heated by the reheating heat exchanger, and the water in the reheating heat exchanger and the downstream side of the water flow from the reheating heat exchanger are heated. By increasing the pressure of the water by the pump so that it does not become a gas-liquid two-phase mixed flow in the outlet side pipe, the water is jetted into the water through the flow path for generating fine bubbles. It is possible to reliably prevent the occurrence of rust and cracks in the reheating heat exchanger due to the gas-liquid two-phase mixed flow.

Furthermore, in the present invention , the flow rate of the fine bubble ejection device is closed when the flow rate is equal to or higher than the set flow rate according to the flow rate of water introduced into the fine bubble ejection device and the flow path for regenerating the fine bubble. By providing the corresponding on-off valve and the pump drive control means for adjusting the flow rate of the water by driving the pump, the following operation becomes possible.

  That is, by controlling the pump rotation speed by the pump drive control means, for example, when the fine bubble ejection operation is performed, the pump rotation speed is increased so that the flow rate of water introduced into the fine bubble ejection device is equal to or higher than the set flow rate. The water is jetted into the water through the fine bubble generating flow path so that the corresponding on-off valve is closed, and the flow rate of the water introduced into the fine bubble jetting device is reduced by lowering the number of revolutions of the pump during the chase operation. By setting the flow rate to less than the set flow rate, the water can be led into the water through the reheating channel with the flow rate corresponding on-off valve opened. Therefore, it is not necessary to provide other means such as an electromagnetic valve in the fine bubble ejection device, and the configuration of the device and the control configuration can be simplified without providing a configuration such as electric wiring in the fine bubble ejection device. The pump may be controlled by controlling the applied voltage instead of controlling the rotation speed.

Further, by providing a remote control device signal-connected to the device with the fine bubble generation function by providing a fine bubble generation operation unit for turning on and off the fine bubble ejection operation of the device with the fine bubble generation function, It is possible to easily turn on / off the fine bubble ejection operation. Therefore, the bath device which is a fine bubble generating function device of the present invention can provide a comfortable bath-time with a simple operation.

It is a schematic diagram which shows the system structural example of the bath apparatus as one Example of the apparatus with a microbubble generation function which concerns on this invention. It is a schematic diagram which shows the control structural example (a) of the fine bubble generation function in the bath apparatus of an Example, and the control structural example (b) of another Example. It is a figure which shows the example of control operation | movement at the time of the fine bubble generation function in the bath apparatus of an Example. It is explanatory drawing which shows typically the structure of an example (Example application example) of a pressurized container applied to the apparatus with a fine bubble generating function which concerns on this invention. It is a schematic diagram for demonstrating the air layer and foam layer which are formed when water is put into the pressurized container applied to the apparatus with a fine bubble generating function which concerns on this invention. In the pressurized container shown in FIG. 4, a graph (a) showing the examination result of the temporal change of turbidity when the total area (gap area) of the notch is changed, and the total area and average turbidity of the notch It is a graph (b) which shows the relationship. In the pressurized container shown in FIG. 4, the length of the air layer and the foam layer when the flow rate of water introduced into the pressurized container is changed for the pressurized container having a total area of notches of 126 mm ² . It is a graph which shows length and turbidity. In the pressurized container shown in FIG. 4, the total area of the notch is 126 mm ^2, and the graph (a) showing the length of the air layer when the flow rate of the introduced water is changed, and the total area of the notch on ^{63mm 2, 84mm 2, 105mm 2} , 126mm 2 and the pressurized vessel for each example application, the length of the relationship between pressure vessel flow of water introduced into the driver after 4 minutes after the air layer It is a graph (b) shown. It is typical sectional drawing which shows the structure of the fine bubble ejection apparatus provided in the bath apparatus of an Example, and its operation example. It is typical sectional drawing which expands an operation | movement part and shows operation | movement of the fine bubble ejection apparatus shown in FIG. It is a graph for demonstrating the function example of the pressure corresponding | compatible on-off valve applied to the fine bubble ejection apparatus shown in FIG. It is typical sectional drawing which shows the structure of the air introduction valve provided in the bath apparatus of an Example, and its operation example. It is an external appearance perspective view of the example of the pressurized container formed using three electrodes. It is a flowchart which shows the operation example of the bath apparatus of an Example. It is a flowchart which shows the operation example following FIG. 14 of the bath apparatus of an Example. It is a flowchart which shows the operation example of the water level detection in a pressurized container using three electrodes in the bath apparatus of an Example, and the air inlet valve opening / closing operation | movement accompanying it. It is a flowchart which shows the operation example of the water level detection in a pressurized container using two electrodes in the bath apparatus of an Example, and the air introduction valve opening / closing operation | movement accompanying it. 5 is a graph showing the results of obtaining the relationship between the total area of notches, the number of boundary fluids, and the distance between notches in the pressurized container of the example application example shown in FIG. It is a schematic diagram which shows the notch shape currently formed in the partition plate in the pressurized container of an Example application example, and the shape change of the water which arises when the water which passed through the notch falls. It is a figure which shows typically the example of the hydraulic jump (hydraulic jump) phenomenon classification | category according to the upstream fluid number. Schematic diagram (a) showing a general jumping water classification shape of a river based on the jumping water phenomenon classification shown in FIG. 20, an explanatory diagram (b) for considering the jumping water classification shape of the application example, and its frame V It is an enlarged view (c). It is a graph which shows the relationship between the viscosity of water and the value of the upstream fluid number in the boundary of the jumping phenomenon classification It is a figure which compares and shows the jumping phenomenon classification | category (a) by the upstream fluid number of a general river, and the jumping phenomenon classification | category (b) by the upstream fluid number when water receives the influence of viscosity. It is explanatory drawing which shows typically the structure of another example (1st development example) of the pressurization container applied to the apparatus with a fine bubble generation function which concerns on this invention. It is a graph which shows the examination result of the length of an air layer, a foam layer, and turbidity when the flow volume of the water to introduce | transduce is changed about the pressurized container shown in FIG. It is explanatory drawing which shows typically the structure of another example (2nd development example) of the pressurization container applied to the apparatus with a fine bubble generation function which concerns on this invention. It is a graph which shows the examination result of the length of an air layer, a foam layer, and turbidity when the flow volume of the water to introduce | transduce is changed about the pressurized container shown in FIG. The top view (a) which shows the structure of the partition plate applied to the further another example (3rd development example) of the pressurization container applied to the apparatus with a fine bubble generation | occurrence | production function which concerns on this invention, A partition plate, It is sectional drawing (b) which shows the positional relationship with a tank inner wall. It is a graph which shows the relationship between the length of an air layer, the length of a foam layer, and turbidity when the flow volume of the water introduced into a pressurized container is changed about the pressurized container of the 3rd development example. It is a graph which shows the examination result of the length of an air layer and a foam layer, and a turbidity when the total area of a notch is 90 mm < ² > about the pressurized container of a 3rd development example. It is a graph which shows the examination result of the length of an air layer and a foam layer, and a turbidity when the total area of a notch is 120 mm < ² > about the pressurized container of a 3rd development example. It is a graph which shows the examination result of the length of an air layer and a foam layer, and a turbidity when the total area of a notch is 180 mm < ² > about the pressurized container of a 3rd development example. It is a graph which shows the ratio of the air length / bubble length with respect to the total area of a notch, and the examination result of turbidity about the pressurized container of a 3rd development example. It is a graph which shows the examination result of the relationship between the flow rate of the water introduced into a pressurization container, and the flow velocity of the water which passes along a notch which changes with the total area of a notch about the pressurization container of the 3rd development example. It is typical sectional explanatory drawing which shows the structure of the further another example of the pressurized container applied to the apparatus with a fine bubble generation | occurrence | production function which concerns on this invention. It is typical explanatory drawing which shows the structure of the further another example of the pressurized container applied to the apparatus with a fine bubble generation | occurrence | production function which concerns on this invention. It is typical explanatory drawing for demonstrating the formation example of the notch and through-hole which are formed in a partition plate as another example of the pressurization container applied to the apparatus with a fine bubble generating function which concerns on this invention. As another example of the pressurized container applied to the apparatus with a function of generating fine bubbles according to the present invention, an example of formation of a through hole formed in a partition plate and an arrangement mode of a surface to be provided corresponding to the through hole It is explanatory drawing which shows an example. It is explanatory drawing which shows a part of system configuration | structure in the other Example of the apparatus with a fine bubble generation | occurrence | production function based on this invention. It is typical explanatory drawing which shows other Example of the apparatus with a fine bubble generation | occurrence | production function which concerns on this invention. It is a graph which shows the temperature dependence of the dissolution amount with respect to the water of air. It is a typical explanatory view for explaining the difference between the flow of the river and the flow through the notch. It is typical sectional explanatory drawing which shows the structure of the further another example of the pressurized container applied to the apparatus with a fine bubble generation | occurrence | production function which concerns on this invention. It is the model for demonstrating the method for giving the countermeasure which does not generate | occur | produce a rust and the rust generation | occurrence | production part which generate | occur | produce by the gas-liquid two-phase flow flow accelerated corrosion in a U-shaped pipe line. It is sectional explanatory drawing which shows the structure of the modification of the 2nd development example of a pressurized container. It is explanatory drawing which shows typically the structure of another example of a pressurized container. It is explanatory drawing which shows typically the structure of another example of a pressurized container. It is typical explanatory drawing for demonstrating the structure and problem of a pressurized container proposed conventionally.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment (application example of the embodiment), the same reference numerals are given to the same name portions as in the conventional example.

  FIG. 1 schematically shows a system configuration example of a bath apparatus as an example of an apparatus with a fine bubble generating function according to the present invention. This bath apparatus is normally installed outdoors, and is a bath hot water supply apparatus in which a reheating burner 16 and a hot water supply burner 10 having three combustion surfaces are provided in an appliance case 27. The hot water supply heat exchanger 7 (7a, 7b) is provided above the reheating burner 16 and the reheating heat exchanger 15 (15a, 15b) for reheating the bath water is provided above the reheating burner 16, respectively. .

  As the fuel for the burners 10 and 16, gas is used in the bath apparatus of the present embodiment, and combustion air is sent to the burners 10 and 16 by a fan 76. The hot water supply heat exchanger 7a and the reheating heat exchanger 15a are primary heat exchangers, and the hot water supply heat exchanger 7b and the reheating heat exchanger 15b are secondary heat exchangers (latent heat recovery heat exchangers). A water supply passage 5 is provided on the inlet side of the hot water supply heat exchanger 7, and a water supply temperature sensor 6 and a flow rate sensor 4 are interposed in the water supply passage 5. A hot water supply passage 11 is connected to the outlet side of the hot water supply heat exchanger 7, and a hot water supply temperature sensor 8 is provided in the hot water supply passage 11.

  The inlet side of the reheating heat exchanger 15 is connected to a duct 19, a recirculation circulation pump 21 that has a function of sending water and circulates bath water, and a return pipe 23. An outgoing pipe 24 is connected to the outlet side of the soaking heat exchanger 15. The outgoing pipe 24 and the return pipe 23 are connected to the bathtub 26, and the return pipe 23 forms an inlet side pipe for introducing water into the pressurized container 30. The pipe 19 and the pipe of the reheating exchanger 15 are formed. An outlet side conduit for leading water from the pressurized container 30 is formed having a passage and an outgoing tube 24. The bathtub 26 functions as a water tank and a water supply unit. By driving the circulation pump 21, the bathtub water is sequentially passed through the outgoing pipe 24, the return pipe 23, the reheating heat exchanger 15, and the pipe line 19, thereby allowing the bathtub water to enter. A recirculation circulation passage 25 is formed to circulate through the pipe line, the pressurized container 30 and the outlet side pipe line in order.

  The recirculation circuit 25 is provided with a running water switch 22, a water level sensor 20, and an air introduction valve 38 for introducing air into the recirculation circuit 25 on the suction side (that is, the return pipe 23) of the circulation pump 21. The circulation pump 21 circulates water (in this case, bath water) by driving the circulation pump 21, and when the air introduction valve 38 is closed, only the water is sent to the pressurized container 30. In the open state, air introduced from the outside via the air introduction valve 38 is dissolved in water (in this case, bath water) under pressure, discharged, and introduced into the pressure vessel 30 under pressure. The air introduction valve 38, the circulation pump 21, and the pressurization container 30 can also be provided in the instrument case 27.

  The circulation pump 21 is formed by a cascade pump, and can be driven even if air is sucked. Therefore, since both the air dissolution and the water circulation can be performed by the single circulation pump 21, the apparatus configuration can be simplified and the fine bubbles can be compared with the configuration in which two pumps, the water circulation pump and the air dissolution pump, are provided. This makes it possible to reduce the size and price of the bath device, which is a device with a generation function.

  Further, in the reheating circulation path 25, a pressurization container 30 is provided on the discharge line 19 of the circulation pump 21, and the reheating heat exchanger 15 is provided on the downstream side of the pressurization container 30. ing. The pressurized container 30 discharges and introduces the bath water pressurized by the circulation pump 21 into the tank 31 and stores it while stirring as described above, so that undissolved air in the tank 31 is additionally dissolved in the bath water. Let The bathtub 26 and the connecting portion of the recirculation circuit 25 are provided with a fine bubble ejecting device 39 for ejecting fine bubbles into the water in the bathtub 26 by ejecting the bathtub water in which the air is dissolved into the bathtub 26. It has been.

  Thus, in the system configuration for generating fine bubbles in the water in the bathtub 26, the pressurization vessel 30 is provided on the downstream side of the circulation pump 21 formed by the cascade pump, and the reheating heat exchanger 15 is further provided on the downstream side thereof. By providing the following effects can be obtained.

  That is, in the water sucked in by the circulation pump 21, the air is dissolved by driving the circulation pump 21, but it is not sufficient, and the undissolved air is contained in the water in the form of bubbles. When the water in that state is introduced into the reheating heat exchanger 15 made of copper, rust (gas-liquid two-phase flow accelerated corrosion described later) and cracks (rear-described gas-liquid 2 described later) are generated in the reheating heat exchanger 15. There is a risk that hydroelastic vibration stress corrosion cracking due to phase flow) occurs. On the other hand, by providing the pressurized container 30 on the downstream side of the circulation pump 21, the pressurized container 30 additionally dissolves air in the water (hot water), and the air is sufficiently absorbed in the water (not yet). If this water is introduced into the reheating heat exchanger 15 in a state that does not include dissolved air bubbles, problems such as rusting in the reheating heat exchanger 15 can be prevented.

  In this embodiment, the piping of the parts from the position where the air introduction valve 38 of the return pipe 23 is provided to the tank 31 of the pressurized container 30 includes the tank 31, the piping, the circulation pump 21, and the circulation pump. In order to prevent rust (flow accelerated corrosion) and cracking (fluid elastic vibration stress corrosion cracking) due to gas-liquid two-phase flow as described above up to 21 emperors, soft cross-linked polyethylene pipes and PPS (polyphenylene sulfide resin) ) And the like using a resin pipe and a resin member.

  Further, the recirculation circulation passage 25 is connected to the hot water supply passage 11 through the pouring passage 14, and the pouring electromagnetic valve 13 is interposed in the pouring passage 14. In FIG. 1, reference numeral 9 is a gas passage to the hot water supply burner 10, reference numerals 51 and 52 are gas solenoid valves, reference numeral 17 is a gas passage to the reheating burner 16, reference numeral 98 is a drain pipe, and reference numeral 97 is a drain. Each sum is shown.

  Next, the pressurized container applied to the present embodiment will be described. FIG. 4A is a schematic longitudinal sectional view showing a configuration of an example of the pressurized container (example application example) applied to the bath apparatus (apparatus with fine bubble generation function) of the present embodiment. ing. As shown in the figure, the pressurized container 30 has a substantially cylindrical shape and a substantially elliptical cross section so that it can withstand the high pressure applied to the pressurized container 30 and is made of polycarbonate. It has a bowl shape, and the inside of the pressurized container 30 is mirror-finished so as to reduce resistance to flowing water.

  The pressurized container 30 is formed with an inlet 32 for discharging the water containing air into the tank 31 facing downward at the center of the upper end of the tank 31 into which water containing air is introduced under pressure. ing. In addition, although the pressure introduction timing to the pressurized container 30 of water is mentioned later, there are two types of the water to be introduced under pressure, that is, water containing air and water alone. On the lower end side of the tank 31, a water outlet 33 and a water outlet 37 for draining water from the tank when not in use for a long time are formed. The outlet 37 is normally closed. Yes.

  Further, as shown in FIGS. 4A and 4B, a metal partition plate (target plate) 34 that partitions the inside of the tank 31 up and down via a space below the inlet 32 of the pressurized container 30 is provided. Is provided. As shown in FIG. 4C, at the outer peripheral end of the partition plate 34, a plurality of notches K as water passage portions through which water flows from the top to the bottom of the partition plate 34 flow down. In the outer circumferential direction, a gap S is formed between each notch K and the inner wall surface of the tank 31 as shown in FIG. Each notch K has a substantially triangular shape, and the circumferential diameter of the partition plate 34 is reduced in diameter toward the center of the partition plate 34, and the opening of the notch K is formed in the tank 31. Close to the inner wall. 4D shows an enlarged view inside the broken line frame B of FIG. 4C, and FIG. 4E shows a cross section of the pressurized container 30 in which the partition plate 34 is arranged in the tank 31. The figure is shown.

  Further, the pressurized container 30 is provided with electrodes 35 and 36 and a ground electrode (not shown in FIG. 4) as water level detection means for detecting the water level below the partition plate 34. ing. FIG. 13 shows an external perspective view of the pressurized container 30 when three electrodes are provided, and reference numeral 137 in the figure is a ground electrode. The electrode 35 is a low water level electrode, the electrode 36 is a high water level electrode, and all of them including the ground electrode 137 are formed of carbon electrodes. The partition plate 34 is formed with holes in the passages that pass through the electrodes 35 and 36 and the ground electrode 137. In FIGS. 4C and 4E, these holes are illustrated. Is omitted. Further, the water level detected by the electrodes 35, 36, and 137 may be the water surface, but in many cases, the upper end of the bubble spreading on the water surface is detected by the electrodes 35, 36, and 137 as the water level.

  In the bath apparatus of the present embodiment, as described above, water or water containing air is stirred in the circulation pump 21 and pressurized and introduced into the pressurized container 30, but the air cannot be completely dissolved (dissolved). In this case, the air reaches the tank inlet 32 of the pressurized container 30 as it is (partially in a gas-liquid two-phase mixed flow).

  In the gas-liquid two-phase mixed flow, the amount of air mixed (liquid mixing ratio) with respect to the liquid (water in this embodiment) is the ratio of the apparent flow velocity (WGO) of air to the apparent flow velocity (WLO) of liquid. It can be expressed using the flow rate ratio. In the pressurized container 30 of the application example of the embodiment and the pressurized container 30 of each development example to be described later, the flow rate of water introduced into the pressurized container 30 is 5 to 7 liters / minute, so the WLO is 5 to 7 liters. / Min. In addition, each development example is various pressurization containers examined before forming the pressurization container 30 of an example application example, and the pressurization container of these development examples is also a device with a fine bubble generating function of the present invention. Can be applied to.

  On the other hand, since WGO is about 400 to 700 cc / min in the amount of 1 atm, β (WGO / (WGO + WLO)) shown on the vertical axis of the Griffith-Wallis flow diagram even if it is not pressurized. Is less than 0.2 (that is, β <0.2 already at 1 atm), so if compressed and the pressure is raised above 1 atm, β is always greater than 0.2 Small value. Therefore, in the pressurized container (example application example and each development example described later) applied to the apparatus with the function of generating fine bubbles according to the present invention, all the gas-liquid two-phase mixed flow introduced into the pressurized container 30 is Bubble. It is considered as Flow.

  In addition, bubble flow, slug flow, churn flow, annular flow, etc. are known as typical flow modes of gas-liquid two-phase mixed phase flow. In particular, bubble flow has a gas phase flow rate in the liquid phase. It is a flow in which small bubbles are dispersed in a continuous liquid phase, although it may be small (although it may not be sufficient as the amount of air that creates white turbid fine bubbles with sufficient turbidity).

  In the pressurized container 30 to be applied, as described above, the level of water stored below the partition plate 34 in the pressurized container 30 is detected by the electrodes 35, 36, and 137. In the apparatus with the function of generating fine bubbles, such as the bath apparatus of the present embodiment, in which the pressurized container 30 is applied to generate fine bubbles (white turbidity) in the bathtub, air is introduced based on the detected water level of the electrodes 35, 36, and 137. Opening / closing control of the valve 38 is performed. That is, the apparatus with the fine bubble generating function closes the air introduction valve 38 when the water level is no longer detected by the electrode 35, and opens the air introduction valve 38 when the water level is detected by the electrode 36, as shown in FIG. As shown in the schematic operation diagram of FIG. 2, the system is basically based on a system in which the volume of the air layer (undissolved air layer) A (shaded portion) formed on the water in the tank 31 is adjusted.

  That is, the bath apparatus of the present embodiment controls at least the undissolved air in the tank 31 of the pressurized container 30 and the air sent from the pump 21 by controlling the flow rate of water introduced into the pressurized container 30. One is dissolved in the water in the tank 31, and undissolved air that has not been dissolved is separated to form an air layer A of the undissolved air in the tank 31. Further, as described above, the electrodes 35, 36, and 137 are provided to determine the size of the volume of the air layer A, and the volume of the air layer A is adjusted based on this determination.

  In this way, the bath apparatus of the present embodiment separates the undissolved air that could not be dissolved in the water in the tank 31 of the pressurized container 30, and the air layer A of the undissolved air is separated into the tank 31. In the control device as shown in FIG. 2 (a), an undissolved air layer forming mode for forming the undissolved air layer A and an air layer not forming the undissolved air layer A are used. In addition to the undissolved air layer formation mode (basic operation mode) for forming the undissolved air layer A as described above, an undissolved air layer is provided in the pressurized container 30. The control is performed by interweaving the operation of the air layer non-formation mode in which the agitation is so strong that no water is formed. That is, the bath device of the present embodiment is based on the operation of forming the undissolved air layer in the undissolved air layer formation mode, and appropriately controls the air layer non-formation mode and the undissolved air layer formation mode. Thus, the jumping phenomenon classification formed in the water flow in the pressurized container 30 is varied.

  In addition, although this point is explained in full detail later, for example, the flow rate of water introduced into the pressurized container 30 is too large, and the bath apparatus enters the air layer non-forming mode, and the undissolved air layer A is formed. When it is no longer performed, the flow rate is controlled so as to be in the undissolved air layer formation mode, the undissolved air layer A is formed, and the volume of the air layer A of the undissolved air formed in the tank 31 Can be properly managed and controlled. Further, in the air layer non-formation mode, the number of revolutions of the circulation pump 21 is controlled to control the flow rate of water introduced into the pressurization vessel 30 and formed in the pressurization vessel 30 as shown in FIG. The length of the foam layer (the foam layer will be described later) is prevented from reaching the water outlet 33 of the pressurized container 30, and bubbles are prevented from being mixed into the water led out to the reheating exchanger 15 side. .

  By the way, in the pressurized container 30 as shown in FIG. 4A, the water containing the air poured from the injection port 32 falls onto the central portion of the partition plate 34 as shown by the arrow in FIG. After passing over the partition plate 34, it passes through the notch K (passes through the gap between the partition plate 34 formed by the notch K and the inner wall of the tank 31), and then (Bernoulli's theorem and water viscosity (By the adsorption phenomenon due to the suction effect due to the reaction force of the water bending force due to the water), while adhering to the surface of the tank inner peripheral wall (inner wall surface of the tank side peripheral wall), the water droplets flow down in the air layer A without being scattered. The water that has passed through the notch K is caused to flow along the surface to be added to the inner peripheral wall of the tank, and the water flow is brought down.

  Water containing air poured from the inlet 32 expands in the upper space 100 partitioned by the partition plate 34, is reduced by the notch K, and is discharged into the air layer A. By this expansion and contraction, dissolution of the gas poured together with water is promoted, and the upper space 100 serves as a pressure equalization chamber for water (or water) containing air released from the notch K. .

  Further, as will be described in detail later, in the pressurized container 30 of the application example of the embodiment, the water flow flowing through the notch K and along the surface to be added of the inner wall surface of the tank 31 is a jet (spray water). The jet 31 reaches the surface of the water stored in the lower part of the tank 31 and collides with the water, and when the velocity is reduced, the jet 31 becomes a normal flow. It is considered that a vortex motion is generated in the water stored in the lower part (below the partition plate 34) of the water. The vortex of vortex motion generated by the kinetic energy released by the discontinuous change from the jet flow to the normal flow. When trying to dissolve the air efficiently, the bubbles introduced into the vortex should be as small as possible. It is considered preferable.

  As described above, the gas-liquid two-phase mixed flow injected from the injection port 32 of the tank 31 is all β <0.2 in the pressurized container 30 of the application example of the embodiment and each development example described later, and Bubble Flow Since Bubble Flow is a flow in which small bubbles are dispersed in a continuous liquid phase, the area where the gas comes into contact with the liquid is large, and when it is introduced into the vortex, it is suitable for gas dissolution. However, in the initial stage of the examination in the pressurized container 30 having the same tank 31 as those pressurized containers 30, the Slug Flow is in the gas-liquid two-phase mixed flow coming out from the inlet 32. In some cases, a gas slug (a gas slug considered to have a diameter of about 8 mm, which is substantially the same as the diameter of the injection port 32) can be seen. Slug Flow is a mixture of a gas slug and a liquid slug, and the gas slug is a large bubble that satisfies the cross section of the flow path, and the liquid slug indicates a liquid portion containing small bubbles.

  That is, the inventor of the present application, in the initial stage of the study for the present invention, uses the same tank as the example of the pressurized container (example application example and each development example) applied to a device with a function of generating fine bubbles such as a bath device. In the pressurized container 30 having the configuration 31, the flow rate of water introduced into the pressurized container 30 is set to 5 to 7 liters / minute so that β <0.2 and the liquid slug is 100%. Contrary to expectation, there was a case where a large bubble gas Slug was found in the bubble flow of the gas-liquid two-phase mixed flow introduced into the pressurized container 30.

  Therefore, this gas Slug is once discharged into the upper space 100 enlarged from the diameter of the inlet 32 (after surrounding the bubbles with water) and applied to the metal partition plate 34 to crush and finely Turned into. Then, bubbles in the water stream in the jet flow state flow down in the air layer A as if they are as small bubbles as possible, push the water below the surface of the stored water, induce a jumping phenomenon, and the vortex motion generated by the jumping phenomenon Vortexed air that had been crushed by the partition plate 34 was vortexed and dissolved in the vortex so that it could be efficiently dissolved.

  Moreover, since it has been found that the gas slug grows rapidly due to the reduced pressure, the inventor of the present application increases the total cross-sectional area of the notch K that is the outlet than the cross-sectional area of the inlet 32 that is the inlet of the upper space 100. Then, the upper space 100 in the pressurized container 30 (in the upper upper space partitioned by the partition plate 34) is used as a decompression chamber, and the gas Slug grown by this decompression is applied to the partition plate 34 to ensure miniaturization. (Confirmation of transition of gas Slug to liquid Slug) That is, the upper space 100 also serves as a decompression bubble crushing chamber, thereby ensuring the subdivision of the gas slug.

  In addition, instead of directly applying the water introduced from the injection port 32 to the metal partition plate 34 as in the pressurized container 30 of the application example of the embodiment shown in FIG. Although the water can be refined by the pressurized container 30 of the second development example (see FIG. 26) and the mode as shown in FIG. 43, the application example of the embodiment is compared with these examples. The pressurized container 30 can make the gas slug more efficient by directly applying water introduced from the inlet 32 to the metal partition plate 34.

  Here, the aspect of the pressurized container 30 of the second development example shown in FIG. 26 will be briefly described. In this example, a through hole 29 is formed in the central portion of the partition plate 34, and the upper side of the through hole 29 is arranged on the upper side. The covering table plate portion 28 is provided in the vertical direction with the plate surface of the partition plate 34 via the gap t, and after the water poured from the injection port 32 falls on the table plate portion 34, passes through the gap t, After passing along a to-be-attached surface (see B in FIG. 26 (e)) under the table plate portion 28, it passes through the through hole 29 and falls to the lower side of the tank 31.

  In the example shown in FIG. 43, the through hole 29 is formed in the partition plate 34 as in the pressurized container 30 of the second development example, but the water injection port 32 is provided on the upper side of the through hole 29. After the target member 67 for colliding the water to be poured is provided in the vertical direction with the gap between the plate surface of the partition plate 34 and the water poured from the water inlet 32 falls on the target member 67 and collides with it. After passing through the gap t and along the surface to be attached of the lower surface of the target member 67, the water flow passes through the through hole 29 (without contacting the inner wall of the partition plate 34 surrounding the through hole 29). Thus, it is configured to drop to the lower side of the tank 31.

  In the pressurized container 30, immediately after the start of water pouring, the upper space 100 partitioned by the partition plate 34 is filled with water containing air. That is, regardless of the size of the bubbles that have exited the injection port 32, the surroundings are surrounded by water at the moment they exit (as described above, since B <0.2, the surroundings are almost water). Then, the water falls to the lower side of the tank 31 while taking in the air in the surrounding air layer A during the flow (in addition to taking air during the flow, It is considered that the air in the air layer A is taken in such a form as to be dragged).

  The inventor of the present application has confirmed the vortex motion and bubble generation that are considered to be a water jump phenomenon as described above under the surface of the water stored in the lower part of the tank 31. Since the Mach cone angle (Mach angle) formed when the columnar protrusions are provided on the surface to be attached by the flow along the side surface) is an acute angle of 90 degrees or less, We consider that the accompanying flow is a turbulent flow. And water containing air that reaches the surface of the water stored in the lower part of the tank as a jet flow drops in speed due to a collision with the stored water and becomes a normal flow, and a jumping phenomenon that occurs at the time of discontinuous change from a jet to a normal flow Intense vortex motion occurs.

  In order to generate this vortex motion in the water stored in the lower part of the tank, in this embodiment, the direction of the water flow created by the notch K of the pressurized container 30 is formed downward, whereby a gas-liquid two-phase mixed phase flow Is pushed into the water stored in the lower part of the tank at a set angle or more (for example, 50 degrees or more. In this embodiment, 90 degrees is vertical), so that the water jump phenomenon is sealed on the water surface (the water jump phenomenon is air The vortex motion is generated in the water while preventing it from occurring in the layer A, and the gas and liquid are stored while being agitated by the vortex motion. The undissolved air (in the air layer A) is dissolved, and the undissolved bubbles rise from the water so that the water surface stored below the partition plate 34 and the lower surface of the partition plate 34 In between, the tank 31 It forms a structure in which an air layer A Zon air is formed. (In the air layer non-forming mode, the air layer A is a lump of bubbles).

  Further, as will be described in detail later, since there is a problem of the piping distance of the recirculation circuit 25, in the case of the pressurized container 30 of the embodiment application example, when water containing air is poured from the inlet 32, The air layer A gradually increases (water level decreases). On the other hand, when only water is poured from the inlet 32, the air layer A gradually decreases (water level increases). The reason is that even if water is poured only from the inlet 32, the water that has passed through the notch K is surrounded by the surrounding air layer (undissolved air layer) along the surface to be added to the inner wall of the tank. This is because the air in the tank A falls to the lower side of the tank while entraining the air. Therefore, when only the water poured from the inlet 32 is water, the air in the tank 31 is dissolved and the air layer A is gradually formed. It will decrease.

  In addition, when a gas-liquid two-phase mixed flow is poured from the notch K at an angle less than 50 degrees (shallow), a phenomenon similar to draining or rebounding phenomenon occurs, and a jumping phenomenon occurs on the water surface. Then, after the generated bubbles move on the water surface, they sink below the water surface, and then lose their momentum and rise to the water surface. At this time, sound is generated in association with the sound of water hitting the water surface and the jumping phenomenon that occurs on the water surface.

  In addition, it is thought that the angle of the boundary (critical angle of repulsion) whether or not the same phenomenon as the water draining or recoil water occurs is determined by the density of the colliding water and the colliding water flow. As described above, the value of about 50 degrees or more is a stable value at which a gas-liquid two-phase mixed phase flow is continuously injected. At the time of continuous injection of a gas-liquid two-phase mixed flow, the density of the water and the water flow is considered to be approximately the same value or slightly, but water> water flow. When the air introduction valve 38 is closed, the density of the water and the water flow temporarily becomes water <water flow, and the critical angle of repulsion becomes small. When the tank 31 of the pressurized container 30 is large like a drum can, which will be described later, at the start of the opening operation of the air introduction valve 38, the relationship between the density of the water and the water flow temporarily becomes water> Even if it exceeds 55 degrees, a phenomenon similar to draining or recoil water may occur.

  Moreover, if the water is poured along the surface to be adhered, there is no adsorption phenomenon due to the suction effect due to the repulsion of the water flow bending force caused by Bernoulli's theorem and the viscosity of the water, so a temporary state when the air introduction valve 38 is closed. Even so, the above phenomenon (recoil phenomenon) occurs at an angle less than 50 degrees (shallow), and the angle at which the gas-liquid two-phase mixed phase flow is poured from the notch K is greater than 50 degrees, for example, a vertical angle However, when a gas-liquid two-phase mixed phase flow is poured without adding the surface to be added, the sound of hitting the water surface is generated.

  Further, when the flow velocity is high, for example, even if the angle of water injection to the water surface is 50 degrees, the water jump phenomenon can be sealed, but the width of the tank becomes large and is not suitable for miniaturization. On the other hand, as the water injection angle approaches 90 degrees which is vertical, the water jump phenomenon can be sealed even when the flow velocity is slow. In addition, even if water is injected at 90 degrees which is vertical when the flow rate is high, the water jump phenomenon can be sealed, but the vortex motion occurs deeply in the water (described later, bubble layer length−air layer length). Therefore, the vertical dimension of the tank 31 becomes large and is not suitable for miniaturization. Although the fluid number will be described later, when the fluid number exceeds a certain value (only the flow rate is increased under the same conditions and the flow rate exceeds a predetermined value), the air layer (air layer) A in the tank 31 becomes “zero”. And the air layer is not formed at all, and the amount of undissolved air cannot be measured.

  As described above, in the pressurized container 30 of the application example of the embodiment, the direction of the water flow formed by the notch K of the pressurized container 30 is formed downward, and the gas-liquid two-phase mixed phase flow is dropped vertically, and By setting the flow velocity of water to an appropriate value, the gas-liquid two-phase mixed flow is pushed into the water stored in the lower part of the tank, so that the water jump phenomenon is sealed at the water surface (the water jump phenomenon occurs in the air layer A). The vortex motion is generated in the water while preventing the gas from being generated in the gas. By dissolving, air can be dissolved efficiently, and by entraining and dissolving air in water, a beautiful air layer A in which splashes do not fly in the undissolved air layer formation mode of the device with fine bubble generation function Can do. As a result, the electrode can appropriately detect the amount of undissolved air without erroneous detection without being exposed to water splash. Further, in the pressurized container 30 of the application example of the embodiment, the sound generated when the bubbles are caught in the vortex of the vortex motion is clogged with water, and it is shaped as if it is sound-insulated with water. Can be possible.

In the pressurized container 30 of the application example of the embodiment, the single notch K having a triangular shape has a base (length in the circumferential direction of the partition plate 34, W in FIG. 4D) of 3.5 mm and a height. Since the length of the partition plate 34 in the radial direction (see h in FIG. 4D) is 2 mm, the area is 3.5 mm ² (base 3.5 mm × height 2 mm / 2 = 3.5 mm ^2). And a plurality of the notches K are provided. Specifically, the total area of the notches K is 63 mm ² (= 3.5 mm ² × 18), 84 mm ² (= 3.5 mm ² × 24), 105 mm ² (= 3.5 mm ² × 30). ), 126 mm ² (= 3.5 mm ² × 36). In the application example of the embodiment, the total area of the notches is equal to the total area of the water passage portion, and both are formed to be larger than the cross-sectional area 50 mm ^{2 of the} inlet 32 having a diameter φ8. Hereinafter, a detailed description of each of these specific examples will be described.

  The water surface collision velocity for minimizing (decreasing) the underwater generation position of the vortex motion is the water flow rate and the size of the notch K (the size of the gap between the notch K and the inner peripheral wall of the tank). It depends on. If the underwater generation position of the vortex motion is immediately after reaching the water surface of the water, the lower end where the bubbles that could not be dissolved by the vortex motion moved through the water is also the shortest (if the amount of water is the same) (hereinafter, The length to the lower end after moving in the water where bubbles are stored is called the foam layer length). The flow of water flow becomes turbulent (spray) when the flow velocity is high, and suddenly changes discontinuously to laminar flow (normal flow) when the flow velocity becomes slow. The flow at this changing boundary is called the limit flow, and the flow velocity is limited. It is called flow velocity. Further, the value obtained by dividing the flow velocity upstream of the boundary by the limit flow velocity is called the upstream fluid number, and generally the fluid number indicates the upstream fluid number.

Further, the water surface collision velocity that minimizes the length of the foam layer is a value that is greater than 1 in which the upstream fluid number, which is the fluid number of the jet (spray water) passing through the notch K, is close to 1 (to effectively form a vortex). The fluid number is 1.7 or more. For example, the upstream fluid number at the time of air mixing is greater than 1 and less than about 32 (the square of the horizontal fluid number in the Griffith-Wallis flow diagram) (( WGO + WLO) ² / gh) is 1000 or less).

  The upstream fluid number is a point upstream of a point where turbulent flow (water jump phenomenon) accompanied by a sudden rise in water level is observed in a river or the like, and is calculated based on, for example, the moving speed of suspended matter flowing in the river. Therefore, it often refers to the fluid number several meters to several tens of meters before the point where the water jump phenomenon is observed. However, in the case of the pressurized container 30 of the embodiment application example, since the distance from the notch K which is the base point of the water flow to the allowable lower end of the stored water is very close to 15 cm, for example, at the base point of the water flow. The upstream fluid number is obtained using the flow rate passing through a notch K, the thickness of the water flow (water depth), and the like.

  In addition, the gas passing through the notch K is a gas-liquid two-phase mixed flow under high pressure and a gas-liquid two-phase flow acceleration phenomenon occurs. Although it cannot be calculated, it can be considered as follows.

First, the inventor of the present application uses only water excluding air to pass through the gap formed by the notch K (when the solenoid valve 65 of the air introduction valve 38 is closed), the flow rate is about (WLO). It has been experimentally confirmed that it is preferable to form notches K that give a flow velocity of 727 mm / second (seconds) or more. For that purpose, the number of notches K is 36 and the total area is 126 mm ^2. In this case, it was found that the flow rate was preferably about 5.5 liters / minute or more. The value of the flow velocity (WLO) through which only water excluding air passes through the gap formed by the notch K when the water volume is 5.5 liters / minute (= 550,000 mm ³ / minute) and the gap area is 126 mm ^2. Is 728 mm / sec (5500000 ÷ 126 ÷ 60 = 728 mm / sec).

  When air is mixed (when the electromagnetic valve 65 of the air introduction valve 38 is opened), only the water excluding the air becomes larger than the flow velocity passing through the gap formed by the notch K (for example, 3. It is estimated that it will increase by 5%). Originally, air and water are stirred and dissolved by the circulation pump 21 between the air introduction valve 38 and the cutout K of the pressurized container 30, and further in the upper space 100 of the pressurized container 30 (reduced pressure). In the bubble crushing chamber), the amount of undissolved air reaching the notch K is considered to be lower than 700 cc / min. If the amount of undissolved air is thus reduced, Although the apparent flow velocity (WGO) of the air passing through the gap formed by the notch K is smaller than when the amount of undissolved air is not decreasing, it is possible to accurately determine how much the air decreases. It cannot be measured.

  Therefore, for the sake of convenience, the calculation is performed assuming that the amount of undissolved air does not decrease at all. However, since this calculation is performed using the maximum value that is not possible any more, it is actually formed by the notch K. The increment due to the apparent flow velocity (WGO) of the air passing through the gap is always less than or equal to the numerical value of the following calculation result.

In the pressurized container 30 of the application example of the embodiment, when air of 700 cc / min (700000 mm ³ / min) is introduced from the air introduction valve 38 at 20 ° C. and 1 atm (= 101.3 kPa), WGO, which is the apparent flow velocity of air, is maximized. The pressure when a flow rate of 5.5 to 7 liters / minute flows is about 3 to 5 kgf / cm ² , and according to Boyle-Charles' law, the pressure at which WGO is maximum is 3 kgf / Since this value is used for cm ² (294.21 kPa) and WGO, which is the apparent flow velocity of the air passing through the gap formed by the notch K, is obtained, WGO is about 0. 2 liters / minute (= 192740 mm ³ / minute). Here, it is considered that the temperature of the air is heated to the same temperature as that of the circulating water at 42 ° C., for example, when the air is introduced into the circulating water.

  WGO = 700000 × ((101.3 + 0) × (273.2 + 42)) / ((101.3 + 294.21) × (273.2 + 20)) = 192740 (1)

Therefore, the apparent flow rate per 1 mm ^{2 of} air passing through the gap formed by the notch K is considered to be 25 mm / second or less (192740 ÷ 126 ÷ 60 = 25 mm / second) when the gap area is 126 mm ^2. It is done. From this, at the time of air mixing, although only the water excluding air has a flow velocity larger than the flow velocity (WLO = 728 mm / second) passing through the gap formed by the notch K, (WLO + WGO) / WLO = ( 728 + 25) /728≈1.035, the rate at which the flow rate increases (becomes larger) is that the flow rate of water introduced into the pressurized container 30 is 5.5 to 7 liters when the gap area is 126 mm ^2. / Min, it is estimated that it is about 3.5% no matter how large.

  In other words, the number of upstream fluids when white air is mixed and when air is not mixed is considered to be almost the same value (the difference between the values when air is mixed is slightly larger than the value when air is not mixed) It is not considered). The same can be said for other specific examples and other water flow rates (for example, 5 liters / minute, 13.2 liters / minute). (Also referred to as the Froude number) is considered as a value obtained by calculation only in water excluding air.

In a specific example of the application example of the embodiment, as shown in (Table 1), the cross-sectional area of the notch K (any of 63, 84, 105, 126 (mm ² )) and the pressurized container 30 are introduced. Depending on the flow rate of water (any one of 5, 5.5, 6, 6.5, and 7 (liters / minute)), an air layer A of undissolved air is formed as indicated by ◯, or as indicated by ×. It was found that the air layer A was not formed. In Table 1, ○ indicates that the undissolved air layer A is formed (undissolved air amount can be measured), and × indicates that the air layer is not formed (undissolved air amount cannot be measured). Indicates that there is. In addition, the inventor of the present application also confirmed that the flow rate of this x portion is more preferable as the flow rate of only water excluding air passing through the gap formed by the notch K.

As is clear from this (Table 1), in the pressurized container 30 of the application example of the embodiment, when the total area of the notches K is 63 mm ² , 84 mm ² , and 105 mm ² , In the condition of the flow rate of 5.5 to 7 liters / minute and the condition of the flow rate of 7 liters / minute when the total area of the notches K is 126 mm ² , an undissolved air layer is not formed. On the other hand, in the pressurized container 30 of the example application example, the conditions at a flow rate of 5 to 6.5 liters / minute when the total area of the notch K is 126 mm ² and the total area of the notch K are 105 mm ² and 84 mm. in the conditions of a flow rate 5 l / min at ^2, 63 mm ^2, and non-dissolved air layer a is formed.

  That is, the undissolved air layer depends on the conditions of the total area of the notch K as the water passage portion formed in the partition plate 34 of the pressurized container 30 and the flow rate of water introduced into the pressurized container 30. It can be seen that A is formed or not. Further, depending on the conditions of the total area of the notch K and the flow rate of the water, the fluid number (upstream fluid number) of the jet (spray water) passing through the notch K varies. The inventor thinks whether or not the undissolved air layer A is formed depending on the value of the fluid number, thereby determining whether or not the amount of undissolved air can be measured, and the formation of the undissolved air layer A. The relationship between the presence and absence of fluid and the number of fluids was examined.

  (Table 2) shows the fluid number in each specific example of the pressurized container 30 of the application example of the embodiment. As can be seen by referring to (Table 1), in (Table 2), the left side of the thick line is an example in which an undissolved air layer A is formed, and the right side of the thick line is an example in which no air layer is formed.

Here, the total area of the cutout K, when focusing on the specific example of 105 mm ^2, 126 mm ^2, regardless even different total area of the cutout K, the boundary of the presence or absence of formation of non-dissolved air layer A boundary It can be seen that the fluid numbers are all in the vicinity of 6.2 (between 6.14 and 6.24). That is, in a specific example of a total area of 105 mm ^2, 126 mm ² of these notches K, the Froude number is about 6.2 of the boundary Froude number or more becomes a condition not to make the non-dissolved air layer, the dissolved air amount It becomes a condition that cannot be measured, and the fluid number is smaller than the boundary fluid number of about 6.2 is the condition that the undissolved air layer A is formed and the amount of undissolved air can be measured (fluid number equivalent to 6.2 or more) It is presumed that the air layer is not formed under the above conditions and a condition less than 6.2, that is, a condition in which the amount of dissolved air cannot be measured and a condition in which the amount of undissolved air can be measured.

Incidentally, the total area of the cutout K, a specific example of 63 mm ^2, 84 mm ^2, at the boundary Froude number greater than 6.2 (notch total area 63 mm ² of K from fluid number 9.45 In the case of 10.39, when the total area of the notch K is 84 mm ² , the fluid number is between 7.09 and 7.79). The inventor of the present application estimates the reason why the fluid number varies depending on the total area of the notch K in the specific example as follows.

In other words, cut-in-out example of a total area of 63 mm ^2, 84 mm ² of K, the total area of the cutout K due to a large notched interval K between as compared to a specific example of 105 mm ^2, 126 mm ² This is because the rate of water collapse through the water flow through the notch K is large (the number of boundary fluids moves due to room for water collapse), and the total area of the notch K is 63 mm ² and 84 mm ^2. total area by narrowing the interval of the notch K between as a specific example of 105 mm ^2, 126 mm ² of (for this purpose, it will reduce the inner diameter of the tank 31), the number of boundary fluid with water collapsed room It has been confirmed that the fluid number of the boundary is about 6.2 when the movement of is corrected. A detailed description of the movement of the boundary fluid number due to the room for water collapse will be described later.

  In addition, since the results shown in (Table 1) are the results in the pressurized container 30 of the application example of the embodiment, the numerical values are obtained when the inside of the pressurized container 30 is appropriately mirror-finished. Even if the surface of the container 30 is to be mirror-finished, the finish may be rough, when the material of the pressurized container 30 is not polycarbonate, or when the bathing agent is contained in the water introduced into the pressurized container 30. Further, it is estimated that the temperature varies depending on the temperature of water introduced into the pressurized container 30. When these conditions (conditions such as the material of the pressurized container 30, the quality of the water, and the temperature) are different, the value of the fluid number at the boundary that is divided into the condition for creating the undissolved air layer A and the condition for not creating the undissolved air layer A is about 6. It is estimated that the value deviates from a value of 2 (equivalent to 6.2).

  In addition, in the case of the pressurized container 30 of the second development example shown in FIG. The air layer was not formed until the minute (air layer length 0 cm), but changed to air layer formation 4 minutes after the start of operation (air layer length 3 cm). Although this reason is mentioned later, it is thought that the difference in solubility is related, and therefore, the fluid number of the boundary is considered to change depending on the temperature of water, the presence or absence of a bath agent, and the like. However, since the description will be difficult to understand if various cases are referred to in detail, in the description of the pressurized container 30 of the embodiment application example, the boundary fluid number is described as 6.2 unless otherwise specified. Go.

  Further, in the bath apparatus of the present embodiment, as described above, the measurement of the undissolved air volume in the pressurized container 30 and the dissolution of air in water in the pressurized container 30 can be performed in an interwoven manner. In addition, switching control between an undissolved air layer formation mode and an air layer non-formation mode (an operation mode in which the undissolved air layer A is “zero”) is controlled, and this control program is changed depending on the fluid number. Details of this control will be described later.

By the way, in the pressurized container 30 of the application example of the embodiment, the height (h) of each notch K is 2 mm, and the thickness h of the water flow passing through the notch K (the thickness of the water flow below the water surface, which corresponds to the water depth). ) Is 0.002 m, the flow velocity (limit flow velocity) of the critical water flow that passes through the thickness h of this water flow is g (gravitational acceleration: 9.8 m / sec ² ), and the critical flow velocity c = √ (gh ) = √ (9.8 × 0.002) = 0.141421 m / sec (about 140 mm / sec).

In the pressurized container 30 of the application example of the embodiment, the flow rate of water introduced into the pressurized container 30 is 5 liters / minute, which is the slowest flow rate condition in the specific example in which the total area of the notches K is 126 mm ² . The hourly flow velocity is about 661 mm / second, and the critical flow velocity of the water flow through the notch K under this condition is about 140 mm / second. If the total area of the notch K is reduced without changing the flow rate, the flow velocity of water increases, but the critical flow velocity is determined by the thickness h of the water flow, so that the total area of the notch K is smaller than 126 mm ^2. , The flow rate is as high as 661 mm / second or more even when the flow rate of water introduced into the pressurized container 30 is 5 liters / minute, and the critical flow rate is about 140 mm / second. Therefore, in the pressurized container 30 of the specific example of the embodiment application example, the limit flow velocity of the water flow through the notch K is about 140 mm / sec regardless of the total area of the notch K.

  In this way, the critical flow velocity of the water flow through the notch K is about 140 mm / second, and the swelling of the water flow peculiar to the jumping phenomenon during the flow of the inner wall of the tank (the vortex motion generated when the normal flow changes from the jet flow). The water flow that flows down along the surface to be added to the inner peripheral wall of the tank is not a normal flow (the flow rate is 661 mm / second) regardless of whether the electromagnetic valve 65 of the air introduction valve 38 is opened or closed. As described above, it is considered to be a jet flow (turbulent flow) (the flow velocity is 661 mm / second, which is a critical flow velocity of 140 mm / second or more and is a jet).

  In addition, when the flow velocity is 661 mm / second and the critical flow velocity is 140 mm / second, the fluid number at the time of passing through the notch K or immediately after passage is 4.72 (flow velocity 661 mm / second ÷ limit flow velocity 140 mm / second) or more. If it does not exist (when air is mixed), the fluid number is estimated to be slightly larger than this value.

  Further, when the water that has fallen through the notch K falls into the water stored under the partition plate 34, the stored water rides on the flow of the water flow, and the upper part of the water surface is from the substantially central portion of the tank. Bubbles rise and cover the water surface over time. At this time, since the bubble at the substantially central portion of the tank is rising from the bottom to the top, it possesses kinetic energy upward, but spread over the water surface, that is, the tank side wall Bubbles in the vicinity of the inner wall of the tank do not possess upward kinetic energy. Water containing air that reaches the surface of the water stored in the lower part of the tank while being jetted may entrap bubbles on the side wall of the tank, but the bubbles do not possess upward kinetic energy (the direction of movement of the bubbles) And the direction of the jet do not face each other), it is possible to easily push the bubbles below the surface of the water.

  In other words, in the pressurized container 30 of the application example of the embodiment, the bubbles are generated by the water flow that flows down along the surface to be added of the inner peripheral wall of the tank and the tank side wall is on the side (moves downward), and the water surface from the lower part of the tank. The collision of the bubbles rising to the side reduces the speed of the water flow to become a normal flow, and the occurrence of a water jump phenomenon on the bubbles and the occurrence of splashing in the air layer A is prevented. ing. As a result, the pressurized container 30 of the application example of the embodiment has a structure in which the fluid number does not need to be increased by the amount necessary to push the bubbles. In addition, since the air bubbles rising in the water are not pushed again by the water flow before reaching the air layer A, the air layer A is filled with the air bubbles (the air bubbles contained in the stored water are in the air layer A). It is possible to prevent repetitive recirculation without increasing the amount of air bubbles).

  Furthermore, the pressurized container 30 has a configuration in which water falls on the partition plate 34 fixed in the tank 31 and does not have a configuration in which a member to which water is applied is floated on the water in the tank 31. Therefore, such a member does not move along the flow of water. Therefore, even if the electrodes 35 and 36 and the ground electrode 137 are formed of carbon electrodes that are vulnerable to impact, the electrodes 35, 36, and 137 are damaged by hitting the members against the electrodes 35, 36, and 137. Can be prevented.

  Furthermore, since the flow of water flows through the pressurized container 30 as shown in FIG. 4B and is stirred in the tank 31, the water flowing from the lower side of the tank 31 to the upper side is the electrodes 35, 36. , 137 can be avoided. Therefore, it is possible to prevent the electrodes 35, 36, and 137 from being damaged by the water flow, and to prevent erroneous detection of the water level. Furthermore, since there is no protrusion that obstructs the flow in the stored water (in the portion where the stored water of the pressurized container 30 accumulates), the protrusion does not vibrate due to a water jump phenomenon (the pressurized container 30 vibrates). It can also be prevented that the protrusions cause pressure corrosion cracking and fall into the water, and the dropped protrusions hit the electrodes 35, 36, and 137 and destroy these electrodes 35, 36, and 137.

Next, in the pressurized container 30 of the application example of the embodiment, as described above, for the examination result of the specific example in which the total area of the notch K is changed, refer to the experimental results shown in FIGS. I will tell you. The present inventors, first, the pressure vessel 30, the flow rate of the water to be introduced into the pressure vessel 30 to 6 liters / min, the total area of the cutout K, as either 63mm ^2, 84mm ^2, 105mm ² The change of turbidity in each case was examined. The turbidity is the dissolved (dissolved) concentration of air. In any of these studies, as shown in (Table 1), a state where no air layer is formed in the pressurized container 30, that is, a state where the amount of undissolved air cannot be measured (the air generated by the device with a fine bubble generating function). This is a mode related to a mode in which the layer A is set to “zero” (air layer non-forming mode), and is performed by combining the air introduction valve control for the air layer “zero” in the air layer non-forming mode.

FIG. 6A shows the result of the study. In FIG. 6A, the characteristic line a indicates the turbidity when the total area of the notch K is 63 mm ^2, and the characteristic line b indicates the turbidity when the total area of the notch K is 84 mm ^2. The characteristic line c indicates the turbidity when the total area of the notches K is 105 mm ² . In addition, the measurement result of turbidity (white turbidity) shown in FIG. 6 etc. is the result of having measured white turbidity using the turbidity checker SC-T3 made from OPTEX. The degree of white turbidity (turbidity) shows the value of the measuring instrument at 5 cm below the water surface of the center of the 180 liter bathtub as it is, and the larger the value, the more cloudy.

FIG. 6B shows the result of obtaining the average turbidity with respect to the total area (gap area) of the notch K when the flow rate of water is 6 liters / minute. Here, the average turbidity was obtained by averaging the turbidity after 1 minute, 2 minutes, 3 minutes and 4 minutes from the start of operation. From these examination results, it was found that good turbidity can be obtained by setting the total area of the notches K to 63 mm ² .

That is, when the total area of the cutout K is reduced to 105 mm ² → 84 mm ² → 63 mm ² , the flow velocity falling through the cutout K becomes faster (flow velocity 952 mm / second → flow velocity 1190 mm / second → flow velocity 1587 mm). Turbidity with respect to the change in the falling flow rate of water falling through the notch K when the total area of the notch K is 105 mm ² → 84 mm ² (flow rate ratio 1.25 times). With respect to the change amount (rising amount), the change in the falling flow rate of the water falling through the notch K when the total area of the notch K is 84 mm ² → 63 mm ² (flow rate ratio 1.33 times). The amount of change (increase) in turbidity is remarkably large. In other words, the turbidity is remarkably increased with respect to the change in the falling flow velocity (1.06 times = 1.33 / 1.25) at this time (while the falling flow velocity has changed about 1.06 times) The average turbidity is increased about 2.7 times).

The reason is considered as follows. That is, the upstream fluid number changes depending on the falling flow velocity of the water falling (flowing down) through the notch K. Depending on the upstream fluid number, for example, as shown in FIG. ), And the shape of the jumping shape is considered to change stepwise according to the number of fluids. However, if the total area of the notch K is 84 mm ² → 63 mm ² , It is thought that the phenomenon is not due to the occurrence of steady jumping but strong jumping.

Specifically, by decreasing the total area of the notch K from 105 mm ² → 84 mm ² → 63 mm ² , the falling flow velocity changes from 952 mm / second → 1190 mm / second → 1587 mm / second. depending on the change, the number of upstream Froude changes 6.8 → 8.5 → 11.3, notch number upstream Froude by the change in the 84 mm ² → 63 mm ² of the total area of K is 8. By changing from 5 to 11.3, the underwater jumping phenomenon has changed from steady jumping to strong flow jumping (because it has crossed the boundary g between steady jumping and strong jumping water), so the turbidity is remarkable. It is thought that it rose. And by this change in the water jump phenomenon, when the area of the notch K is 63 mm ² , it is considered that undissolved air in the tank 31 is easily dissolved in the falling water, and the turbidity can be increased. In addition, the feeling of bathing may improve if the turbidity is higher and the whiteness of the water in the bathtub is increased.

  In the pressurized container 30 of the example application example, when the upstream fluid number changes from 8.5 to 11.3, the reason why the underwater jumping phenomenon has changed from steady jumping to strong flow jumping is described. Will be briefly described below with reference to FIGS. 20 and 21 (details will be described later).

  First, FIG. 20 and FIG. 21 will be described briefly. The water jump phenomenon can be classified into wave jump water, weak water jump, vibration jump water, steady jump water, and strong water jump water in order from the lowest level according to the level. 20 and 21, the boundary between the wave jump and the weak jump water is d, the boundary between the weak jump water and the vibration jump water is f, the boundary between the vibration jump and the steady jump water is f, and the steady jump and the strong jump water are The boundary is shown as g. These boundaries d to g correspond to the Froude number, and the water jump phenomenon changes stepwise according to the Froude number, but even when the Froude number is the same, the viscosity experienced when the water passes through. Therefore, it is considered that there is a difference in the jumping phenomenon according to the fluid number.

  In FIG. 20, the direction of the arrow Z indicates the direction in which the viscosity of water increases, and details of the relationship between this viscosity and the jumping phenomenon classification will be described later. Corresponding values (this value changes slightly with increasing viscosity) are considered to be involved in the jumping phenomenon classification. Further, in FIG. 22, the relationship between the viscosity and the fluid number is shown by characteristic lines, and the characteristic lines d to g in the same figure correspond to the boundaries d to g in FIG. The boundary lines d to g in the figure coincide with the characteristic lines d to g in FIG.

  In FIG. 20, the application example of the embodiment is shown as an embodiment. However, the pressurized container 30 of the application example of the embodiment shown in FIGS. 20 and 21, the second development example, and the third development example. The result of the examination of the pressurized container is that the material of the pressurized container 30 is polycarbonate, and the inner surface is mirror-finished (for example, when transparent material is used, it is made of transparent glass instead of polished glass so that the inside can be seen through. It is a result of conducting an experiment as such a state. FIG. 21 (a) shows an excerpt of the range of N in FIG. 20 (the range including the second development example and general jumping classification of rivers and the like). b) shows only an excerpt within the range of M in FIG. In FIG. 22 as well, the range of N corresponds to the general classification of water jumps such as rivers.

  As shown in FIG. 21 (a), the jumping classification of river flows (the jumping classification of areas that are hardly affected by viscosity) changes in stages, and if both the X-axis and Y-axis are set to the same scale, The characteristic line h connecting the fluid numbers at the boundary of the jumping water classification is a straight line with an angle of 45 degrees passing through the point where the fluid number is 1.

  In addition, it is considered that the jumping water classification in the pressurized container 30 of the application example of the embodiment changes stepwise as shown by the broken line in FIG. That is, the jump classification is different from the jump classification of the river flow shown in FIG. 21A, but the characteristic line i connecting the fluid numbers at the boundary of the jump classification is a predetermined angle passing through the point where the fluid number is 1. It is estimated that it becomes a straight line. When the pressurized container 30 of the application example of the embodiment is used, as described above, the value of the fluid number at the boundary divided into the condition for creating the undissolved air layer A and the condition for not creating it is about 6.2. Therefore, since the boundary between the vibration jump and the steady jump is considered to be equivalent to a fluid number of 6.2, the jump phenomenon classification based on the upstream fluid number of the pressurized container 30 in the application example of the embodiment is shown by a broken line in FIG. Thus, it is estimated that the characteristic line i connecting the boundaries of the jumping water classification is a jumping water phenomenon classification in which the fluid number is a straight line passing through the point where the fluid number is 1 and the point where the fluid number is 6.2. In the third development example to be described later, the line connecting the boundaries of the jumping water classification is considered to be a characteristic line j in FIG.

Here, according to the jumping phenomenon classification shown by the broken line in FIG. 21 (b), the boundary between the steady jump and strong jump is considered to be a fluid number of 12.4, and the total area of the notch K is 105 mm ² → 84 mm. ² → 63 mm ² and even if the fluid number becomes 6.8 → 8.5 → 11.3, the jumping phenomenon classification is a steady jump that is within the range of the fluid number 6.5 to 12.4. is there. As described above, in the case of the same jump phenomenon, the relationship between the gap area (total area of the notch K) and the average turbidity shown in FIG. Only when the total area of the notches K was 63 mm ^2, a rapid increase in turbidity was observed.

That is, according to the estimation from the water jump classification shown by the broken line in FIG. 21 (b), it is shown in FIG. 6 (b) even though it is considered that strong water jump will not occur unless the fluid number is 12.4 or more. From the experimental results, the boundary between the actual steady water jump and the strong water jump when the pressurized container 30 of the example application is used is not the fluid number 12.4, but the fluid number is between 8.5 and 11.3. Therefore, it is considered that strong jump water is generated at a flow rate of 6 liters / minute with a total area of the notches K of 63 mm ² and a fluid number of 11.3.

The cause of this is that when the water flow passes through the notch K and flows through the surface to be added (in the pressurized container 30 of the embodiment application example, the inner wall of the tank 31), the influence of the viscosity of the water flow is large. It seems to be due to the difference. That is, FIGS. 19A and 19B schematically show the shape of the water flow flowing through the notch K along the attached surface of the inner peripheral wall of the tank. As shown in the figure, the water flow passes through the notch K and then flows down while the triangular base portion is in contact with the inner wall surface of the tank 31, and the shape collapses and the base (contact surface) spreads. However, the contact surface of the water flow with the surface to be added is shown in FIG. 19 (a) when the water flow is slow and when the water flow shown in FIG. 19 (b) is fast. In the case of high speed (that is, in the case of a specific example in which the total area of the cutouts K is 63 mm ² in the pressurized container 30 of the application example of the embodiment), the water flow is flowing from the cutouts K to the water surface (contact surface). ) The rate of collapse is small.

Thus, when the water flow is fast, it is less susceptible to the influence of the viscosity than when the water flow is slow. Therefore, from the broken line in FIG. Contrary to the fact that it does not seem to be a jump, it is considered that the fluid number is 11.3 and the boundary between steady jump and strong jump is exceeded. Incidentally, the flow rate exceeding the fluid number of 12.4 at the total area of the notch K of 126 mm ² is, for example, 13.2 liters / minute or more.

  Note that the jet (turbulent flow) releases energy for a laminar flow with a Froude number of 1 or less due to a water jump phenomenon. The amount of energy released becomes large (not proportional to FIG. 6B). Therefore, the classification of the jumping phenomenon based on the upstream fluid number can also be expressed as the classification of the jumping phenomenon based on the amount of released energy for the jet flow (turbulent flow) to be laminar (the jumping phenomenon due to the released energy also occurs in a discontinuous manner. Therefore, the jumping phenomenon is classified according to the fluid number of the flow).

  As shown in FIG. 42A, the river has an opening on the upper side, and the flow of water in the river flows as shown by an arrow while touching the bottom and side surfaces of the river. Then, when the water jump phenomenon occurs, as shown by HJ in FIG. 42 (b), a rise called a triangular wave jump occurs on the opening side (the water level rises). In such a river flow, the proportion of the area where the water flow touches the bottom or side of the river is small (the part that flows by touching the bottom or side, that is, the part that is affected by viscosity is the other part of the flow. Very small). In addition, the viscosity which a flow receives can be represented by the Reynolds number.

  When the Reynolds number is a large value of several tens of thousands to several tens of thousands or more, the range in which the influence of viscosity can be ignored is shown in the ranges indicated by N in each of FIGS. Thus, the Froude number at which the jumping phenomenon changes is considered to be a constant value. In other words, since the Reynolds number can be ignored in rivers, the relationship between the Froude number and the Reynolds number has not been studied.

  In this case (when the Froude number is obtained ignoring the Reynolds number), the characteristic line h in FIG. 21A is a straight line with an angle of 45 degrees passing through the point where the Froude number is 1, as described above. Therefore, the value in the Y direction of the characteristic line h is equal to the value obtained by subtracting 1 from the value in the X direction, and the energy released when the water jump becomes laminar flow (value corresponding to the fluid number) is weak water jump. 0.7 (1.7-1.0 = 0.7) for the case of vibration, 1.5 (2.5-1.0 = 1.5) for the case of vibration jumping, and 3.5 ( 4.5-1.0 = 3.5), and in the case of strong jump water, 8.0 (9.0-1.0 = 8.0).

Note that the downward arrow N ₂ in FIG. 21 (a) indicates that a steady jump occurs when the upstream flow number 7 is normal, and energy corresponding to a fluid number 3.5 is released, The downward arrow N ₁ indicates that a strong water jump occurs when the upstream flow number 21 is normal, and energy corresponding to a fluid number 8 is released.

  On the other hand, when water flows out through the notch K, as in the pressurized container 30 of the application example of the embodiment and the pressurized container 30 of the development example, as shown in FIG. From the state where the water passes through, the region where the water flow touches the inner wall of the notch becomes the same state as the flow of the river as shown in FIG. 42 (a), and thereafter, FIG. As shown in (b), the shape of the flowing water changes every moment and the shape collapses, so that the value of the viscosity that the water flow receives increases. In other words, when water flows out through the notch K, the Reynolds number itself cannot be applied to the viscosity received by the water flow (that is, the viscosity is calculated by applying the calculation formula for obtaining the Reynolds number as it is. However, the viscosity can be taken as a value corresponding to the Reynolds number, and the value corresponding to the Reynolds number decreases as the viscosity of the water flow increases. For example, in the example application example and the third development example, the value corresponding to the Reynolds number is considered to be, for example, about 700 to 3000, compared with the Reynolds number of the river flow (tens of thousands to hundreds of thousands or more). Much smaller.

  Then, it is considered that the fluid number for switching the water jump classification changes corresponding to the increase in the viscosity of water, and the fluid number for switching the water jump classification tends to increase as the viscosity increases. In other words, the water flowing through the notch K has a higher viscosity that the water receives than the river flowing through the river (the amount of increase in viscosity), and the energy lost due to the viscosity increases and the jumping classification changes. The value of the Froude number increases, and the amount of energy for creating the jet becomes larger than the energy released when the jet becomes normal due to jumping water.

  For example, in the pressurized container 30 of the application example of the embodiment, it is considered that the relationship between the energy release amount and the fluid number at the position indicated by the arrow C in FIG. 20 applies, but in this case, the steady state in a general river Whereas the amount of energy released when laminar flow is caused by jumping water is 3.5 (4.5−1.0 = 1.5), in the pressurized container 30 of the embodiment application example, the viscosity is the flow of the river Energy loss is large (for example, about 1.5 to 2), and the amount of energy released is 3.5 unless the flow rate is increased (if energy is not applied to the water flow) until the fluid number exceeds 6.2. In other words, 1.7 (6.2-3.5-1) is an energy loss lost due to viscosity.

In the case of the pressure vessel 30 of the third development example in which the shape of the notch K is rectangular, the water collapses more than in the case of the pressure vessel 30 in the example application example in which the shape of the notch K is substantially triangular. Since the energy loss is large, the total area of the notches K is 90 mm ² and the flow rate of water introduced into the pressurized container 30 is 7 liters / minute, as shown by a point B1 in FIG. Even if the Froude number is 10.69, it is a vibration jump, so the energy loss is 6.19 or more (10.69-3.5-1). Thus, when the pressurized container 30 of the example application example and the pressurized container 30 of the third development example are compared, the rectangular notch is compared with the configuration in which the substantially triangular notch K is formed. The structure to be formed has an energy loss of 3.6 times or more, and it can be seen that the energy loss can be greatly suppressed if the cutout shape of the application example of the embodiment that is difficult to collapse is used.

  20 that the energy loss of the pressurized container 30 of the second development example is smaller (substantially zero) than that of the pressurized container 30 of the example application example. Since it is difficult to increase the flow rate itself compared to the application example of the embodiment, it is difficult to increase the turbidity, and the pressurized container 30 of the application example of the embodiment is for generating fine bubbles in the bathtub 26. Excellent as a pressurized container 30. This will be described later.

  As described above, in the pressurized container 30 of the application example of the embodiment, the fluid number of the water jump classification is a unique classification depending on the Reynolds number related to the viscosity of water, and the boundary f between the vibration water jump and the steady water jump in the classification The bath apparatus (apparatus with a fine bubble generating function) of the present embodiment is divided into a mode in which the air layer A is formed below the partition plate 34 and a mode in which no air layer is formed. That is, the mode switching control means (see FIG. 2) provided in the bath apparatus of the present embodiment uses the value of the upstream fluid number, which is the fluid number of the flowing water passing through the notch K, as the boundary of the jumping phenomenon classification. Boundary fluid number (the boundary between steady and oscillating water jumps, the value is about 6.2) is set to an undissolved air layer formation mode, and the upstream fluid number is a value greater than the boundary fluid number. By doing so, the air layer non-formation mode is set.

7 shows the turbidity and the length of the air layer (air length) shown in FIG. 5 for a specific example in which the total area of the notches K is 126 mm ² in the pressurized container 30 of the application example of the embodiment. And the length of the foam layer (foam length) are shown by examining the flow rate of water introduced into the pressurized container 30. In FIG. 7, characteristic lines a, b, and c indicate the lengths of the foam layers when the flow rates are 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively, and characteristic lines d, e and f indicate the length of the air layer when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively, and the characteristic lines g, h, and i are Turbidity is shown when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute. Further, FIG. 8A shows the characteristic lines d, e, and f extracted from FIG. 7, and in the pressurized container 30 of the application example of the embodiment, the total area of the notches K is 126 mm ² . The length of the air layer is shown when the flow rate of water introduced into the container 30 is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute.

The presence or absence of formation of the air layer A that can be seen from these characteristic lines is as shown in (Table 1). In the pressurized container 30 having the total area of the notches K of 126 mm ² , the characteristic lines d and e are respectively shown. As shown, when the flow rate of water introduced into the pressurized container 30 is 6 liters / minute and 6.5 liters / minute, an air layer is formed, and as shown by the characteristic line f, the notch K When the flow rate of water introduced into the pressurized container 30 having a total area of 126 mm ² is 7 liters / minute, the air layer becomes zero and the air layer is not formed, so the amount of undissolved air cannot be measured. Further, the total area of the cutout ^K, 105 mm ^2, 84 mm 2, in each specific example of 63 mm ^2, flow rate 6 l / min of water introduced into pressure vessel 30 6.5 l / min, 7 At any flow rate at liters / minute, the air layer (air layer A) is not formed as in the characteristic line f in FIG.

That is, in the specific example of the application example of the embodiment, the length of the air layer (air length) after 4 minutes from the start of operation when the flow rate of water introduced into the pressurized container 30 is changed is shown in FIG. ), The pressurized container having a total area of the notch K of 126 mm ² is different in the length of the air layer depending on the flow rate of water introduced into the pressurized container 30. in each embodiment the total area is 105mm ^2, 84mm ^2, 63mm ² in K, as shown by the characteristic line b, an air layer is zero at any flow rate. In this way, the state where the air layer is not formed is a state in which carbonated water is poured from above the bubbles, as shown in FIG.

  Here, the requirements necessary for the pressurized container applied to the apparatus with a fine bubble generating function of the present invention, which has been clarified by the study of the present inventor, are summarized as shown in the following (A) to (D). Become. Moreover, in the apparatus with a fine bubble generating function of the present invention, control as shown in (F) is required.

(A) In order to reduce the vertical dimension of the tank 31 and reduce the size, the position where the vortex motion is generated in water is immediately after passing through the water surface. That is, the number of fluids in the stream (the number of fluids on the upstream side) is set so that the water containing the air reaching the water surface stored in the lower part of the tank in the state of the stream becomes normal as soon as the velocity drops due to the collision with the stored water. I want a value greater than 1 and less than about 32. In order to make vortices effectively, it is desirable that the fluid number is larger than 1.7.
(B) In order to increase turbidity, it is preferable that the flow rate of water flowing down from the upper side of the partition plate 34 is higher as described above. In order to satisfy this requirement, in order to allow water to flow from the upper side to the lower side of the partition plate 34, a method that can reduce the total area of the water passage portion (gap) formed by the notch K or the like is desired.
(C) When the gap (in the pressurized container 30 of the application example of the embodiment is a gap between the notch K and the inner peripheral wall of the tank, for example, the height h shown in FIG. 4D) is narrow, In the fine bubble ejection device (see FIG. 9) for generating fine bubbles in 26, dust, hair, etc. that have passed through the small-diameter through-hole of the filter 54 provided in the suction section for sucking in bath water and the like are clogged with gaps. Therefore, the vertical distance from the bottom (the thickness of the water flow) (here, h) is preferably 1.5 mm or more if possible.
(D) In order to form the air layer A of undissolved air, a portion (surface to be added) to which water through the gap is added is necessary.
(F) It is considered that there is a difference in the jumping phenomenon under water depending on the falling flow velocity (or Froude number) of the water flowing down from the upper side to the lower side of the partition plate 34, and the flow rate range (or Froude number range) that creates the air layer A ) And a flow rate range (or Froude number range) that does not form the air layer A, that is, it is necessary to perform control to switch between the undissolved air layer formation mode and the air layer non-formation mode. Further, in each mode, it is important to adjust the amount of air introduced into the pressurized container 30. To that end, in the apparatus with a fine bubble generation function that generates the fine bubbles by applying the pressurized container 30, It is necessary to control the dedicated air introduction valve 38. For example, even in the case of operating in a flow rate range that does not normally create the air layer A, when the filter 54 is clogged, the flow rate of water injected into the pressurized container 30 is reduced to create the air layer A. It is necessary to switch the control method.

As described in (A) above, the grounds that the upstream fluid number is about 32 or less and the square of the fluid number is 1000 or less are derived from (C). That is, the fluid number is expressed by the flow velocity flowing through the notch K ÷ the critical flow velocity at the notch K. From the above (C), the height h is preferably 1.5 [mm] or more, and 1.3 [mm (The upper limit of the critical flow velocity is √ (9.8 [m / s ² ] × 0.0013 [m]). On the other hand, the flow velocity flowing through the notch K is subject to erosion and corrosion. Considering 3.5 [m / s] to 3.6 [m / s] (3.5 [m / s]: stainless steel, 3.6 [m / s]: 30% cupronickel) Therefore, the square of the Froude number is expressed by (3.6 [m / s]) ² ÷ ((9.8 [m / s ² ]) × (0.0013 [m])). It is considered to be smaller than 1017, and a value of about 1000 or less is derived.

  In addition, as a technique for increasing the turbidity of water due to fine bubbles ejected into a water tank such as the bathtub 26, the pressure vessel 30 is used to make water in which a large amount of air that exhibits high turbidity is dissolved. Although it is required, even if it does not show very high turbidity (the amount of dissolved air is not so high as to show high turbidity), if it is made in large quantities and supplied into the bathtub (with water supply) If the water in which the air is dissolved is decompressed to generate fine bubbles), the turbidity of the water in the bathtub 26 can be increased (in the case of making water in which a large amount of air is dissolved to show high turbidity) The same turbidity). However, supplying a large amount of water into the bathtub 26 requires that the pump 21 be enlarged or the rotational speed of the pump 21 be increased. If the pump 21 is enlarged, the apparatus becomes larger and the pump 21 rotates. Increasing the number increases the noise. Furthermore, supplying a large amount of water into the bathtub 26 is not preferable because it means that a violent water flow flows toward the bather.

  Therefore, when the device with the function of generating fine bubbles is used as, for example, a bath device, a large amount of air that shows high turbidity using the pressurized container 30 is supplied instead of supplying a large amount of water to the bathtub 26 or the like. It is required to make dissolved water, and "To increase turbidity" described in (B) above is "to make water in which a large amount of air that shows high turbidity is dissolved. For example, when the flow rate of water flowing from the upper side to the lower side of the partition plate 34 is higher, the flow rate is lower from the upper side of the partition plate 34 to the lower side. "It is preferable that the flow rate of water is high." As will be described later, in the configuration in which fine bubbles are ejected to the pool instead of the bathtub, an example is described in which “a large amount of water in which a large amount of air that exhibits high turbidity is dissolved” is produced.

  By the way, the inventor of the present application proposes a pressurized container that satisfies the requirements (A) to (D) in consideration of satisfying the requirement (F) in the apparatus with a fine bubble generating function of the present invention. Before forming the pressurization container 30 of the application example of the embodiment, the pressurization container 30 (first development example, second development example) shown in FIGS. 24 and 26 and the partition plate shown in FIG. The pressurized container 30 having the 34 (third development example) was examined.

  Table 3 shows a list of examination results for the pressurized container 30 of the example application example and the pressurized container 30 of the first to third development examples described below. Note that the pressurized container 30 of the example application example has superior characteristics as compared with the pressurized container 30 of each development example. Therefore, in this example, the pressurized container 30 of the example application example is used. Is used to form a bath device that is a device with a fine bubble generation function, but the pressurized container 30 of the first to third development examples is applied to the device with the fine bubble generation function of the present invention. It can also be formed. Moreover, the apparatus with a fine bubble generating function of the present invention can be applied to various pressurized containers as described later, including these development examples and application examples.

  The pressurized container 30 of the first development example shown in FIG. 24 has substantially the same configuration as the pressurized container 30 of the application example of the embodiment, the tank 31 and the like, as shown in FIGS. However, as shown in the cross-sectional view of FIG. 24 (b), the partition plate 34 is not formed with a notch, and is previously formed between the outer peripheral edge of the partition plate 34 and the inner peripheral wall of the tank 31. A gap S having a predetermined set interval is formed. That is, the gap nozzle uses the difference in diameter between the partition plate 34 and the tank inner wall. The partition plate 34 is formed with holes in the passing portions that pass through the electrodes 35 and 36 and the ground electrode 137, but these holes are not shown in FIG. .

As a specific example of the first development example, the diameter of the inner wall of the tank 31 is 45 mm which is the same as that of the pressurized container 30 of the application example of the embodiment, whereas the diameter of the partition plate 34 is 42 mm and the gap S ( The diameter of the gap between the tank inner wall and the outer periphery of the partition plate 34 is 1.5 mm, and the gap area is 204.885 mm ² . Thus, the size of the gap S is determined so that the area of the gap is formed to be larger than the cross-sectional area 50 mm ^{2 of the} inlet 32 having a diameter of 8 mm. The thickness of the water flow is 0.0015 m, the flow rate is about 6 liters / minute, the flow rate is 488 mm / second, the critical flow rate is 121 mm / second, and the fluid number is 4 (flow rate 488 mm / second divided by the critical flow rate 121 mm / second). Value = 4/488 = about 0.0082, limit flow velocity / total area of gap S = 121 / 204.885 = about 0.6.

  FIG. 25 shows the length of the air layer (air length), the length of the foam layer (bubble length) and the turbidity shown in FIG. The results of studying by changing the flow rate of water introduced into are shown. Here, turbidity is the dissolved (dissolved) concentration of air. In this study, test data of a flow rate of 6 liters / minute to 7 liters / minute corresponding to 4 to 4.7 having a fluid number of 3.6 or more is shown.

  In FIG. 25, characteristic lines a, b, and c indicate the length of the foam layer when the flow rates are 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively. , E, and f indicate the length of the air layer when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively, and the characteristic lines g, h, and i are respectively The turbidity is shown when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute. In addition, after 3 minutes and 4 minutes, the flow rate (liter / minute), air length (cm), bubble length (cm), air length / bubble length, bubble length-air length (cm), turbidity, fluid The relationship between the number and the flow rate (mm / second) is shown in (Table 4).

  In this first development example, in order to increase the flow rate of water through the gap S in order to increase the turbidity, the thickness of the water flow must be less than 1.5 mm, that is, the gap S is set to 1.5 mm. Since it must be formed narrower than this, the requirement (C) is not satisfied, and it has been found that no further improvement in performance can be expected.

  Next, a second development example will be described. In the pressurized container 30 of the second development example, as shown in FIGS. 26A and 26D, a gap for allowing water to flow downward from above the partition plate 34 is formed at the center of the partition plate 34. doing. In other words, in the second development example, a through hole 29 is formed in the central portion of the partition plate 34, and the table plate portion 28 that covers the upper side of the through hole 29 passes through the clearance t between the plate surface of the partition plate 34 and the vertical direction. After the water poured from the injection port 32 falls on the table plate portion 34, it passes through the gap t and is attached to the surface under the table plate portion 28 (see B in FIG. 26 (e)). ) And then drops to the lower side of the tank 31 through the through-hole 29. The falling flow at this time is falling as a single water flow with four ropes just like a squeezed rope. It appears that the four water streams draw together one another and adsorb and adsorb one stream. When water (water containing water and water not containing air) passes through the through hole 29, it passes through the wall of the partition plate 34 around the through hole 29 (inner wall of the partition plate 34) without contact, and the partition plate 34 falls below.

FIG. 26 (b) shows a side view of the coupling configuration of the partition plate 24 and the table plate portion 28, and FIG. 26 (c) shows the planar configuration (electrode passage portion). The holes are omitted). As shown in these drawings, the table plate portion 28 is connected to the partition plate 34 via the leg portion 65, and the width W (see FIG. 26C) of the leg portion 65 is 3 mm. ing. The gap t between the partition plate 34 and the table plate portion 28 is, for example, 3 mm (water flow thickness 0.003 m), and the diameters of the table plate portion 28 and the through hole 29 are both 20 mm. Therefore, the total area of the gap t (the area of the area excluding the formation area of the leg portion 65 from the gap area of the area along the outer periphery of the table plate portion 28) is 20 × π × 3-3 × 3 × 4 = 152. 4 mm ^2, and the formed larger than the cross-sectional area 50 mm ² of the inlet 32.

  In the second development example, the water flow thickness is 0.003 m, the flow rate is about 6 liters / minute, the flow velocity is 650 mm / second, the critical flow velocity is 171 mm / second, and the fluid number is 3.8 (flow velocity is 650 mm / second ÷ limit flow velocity is 171 mm / second). The fluid number / flow velocity = 3.8 / 650 = approximately 0.0058, and the total area of the critical flow velocity / gap t = 171 / 152.4 = approximately 1.1.

  Regarding the second development example, the length of the air layer (air length), the length of the foam layer (foam length), and the turbidity shown in FIG. The result of examination by changing the flow rate of water is shown in FIG. In this study, test data corresponding to a fluid number of 3.8 to 4.5 and a flow rate of 6 liters / minute to 7 liters / minute are shown. In FIG. 27, characteristic lines a, b, and c indicate the lengths of the foam layers when the flow rates are 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively. d, e, and f indicate the length of the air layer when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively, and the characteristic lines g, h, and i are respectively The turbidity when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute is shown.

  In addition, after 3 minutes and 4 minutes, the flow rate (liter / minute), air length (cm), bubble length (cm), air length / bubble length, bubble length-air length (cm), turbidity, fluid The relationship between the number and the flow rate (mm / sec) is shown in (Table 5).

  In this second development example, the flow of water breaks through the center of the table plate portion 28, and unlike the application example of the embodiment and other examples described later, the water flow falls along the surface to be added for a long distance. I have not let it. As a result, in the second development example, it is possible to prevent a high fluid number from occurring in jumping water, which is excellent in that it is possible to induce a jumping phenomenon below the surface of the water without increasing the pump speed (water pressure, flow velocity). ing. In addition, when a gas-liquid two-phase mixed flow is poured without any surface to be added, a sound that strikes the water surface is generated, but in the second development example, a sound that strikes the water surface is prevented. Therefore, it is possible to prevent the generation of a sound hitting the water surface, etc., because there is a sufficient surface to be added (the surface to be added B in FIG. However, as a result of the water stream concentrating and falling and deeply submerging under the surface of the water, the length of the foam layer-air layer, that is, the bubbles submerged under the surface of the water, is increased. It is necessary to increase the length, and is not suitable for downsizing.

  In order to increase the flow rate of water through the gap t in order to increase the turbidity, the total area of the gap t is reduced by reducing the diameter of the table plate portion 28 while keeping the thickness of the water flow at 3 mm. Thus, the flow rate of water passing through the gap t can be increased. However, when the diameter of the table plate portion 28 is reduced, there is a problem that the portion to which the water flow is added to form the air layer A disappears, and the requirement (D) is not satisfied. If the diameter 65 is further increased and the leg portion 65 is made thicker, the condition (D), which is one of the requirements for the pressurized container, may be cleared. It seems that it is difficult to drop them with a single water stream.

  Next, a third development example will be described. The pressurized container 30 of the third development example is formed in substantially the same manner as the pressurized container 30 of the application example of the embodiment. In the third development example, as shown in FIG. 28A, a partition plate 34 having a rectangular cutout K is applied. Also in FIG. 28, the illustration of the holes at the electrode passage portions is omitted. Further, in this example, the cutouts K are formed in a rectangular shape and arranged at equal intervals, the partition plate 34 has a gear shape, and the cross section of the pressurized container in which the partition plate 34 is disposed in the tank 31. The figure is as shown in FIG.

The width of one notch K (the length in the circumferential direction of the tank 31) (see FIG. 28A) is 2 mm, and the depth (the length in the diameter direction of the tank 31) (see FIG. 28A). By setting 30 notches K to 30 mm, the total area of the notches K (total area of the gap between the notch K and the inner peripheral wall of the tank) can be 90 mm ² . Similarly, by setting only the depth of the notch K to 2 mm and 3 mm, the total area of the notch K (total area of the gap between the notch K and the tank inner peripheral wall) can be set to 120 mm ² and 180 mm ^2. .

In FIG. 29, in the third development example, the length of the air layer (air length) and the length of the foam layer (bubble length) when the total area of the notches K is 90 mm ² are as follows: The result of having examined by changing the flow volume of the water introduced into the pressurized container 30 is shown. In FIG. 29, characteristic lines a, b, and c indicate the lengths of the foam layers when the flow rates are 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively. d, e, and f indicate the length of the air layer when the flow rate is 6 liters / minute, 6.5 liters / minute, and 7 liters / minute, respectively, and the characteristic lines g, h, and i are respectively The turbidity when the flow rate is 6 liters / minute, 6.5 liters / minute, 7 liters / minute is shown.

29 (result in an example in which the total area of the notches K is 90 mm ² in the third development example) and the notch K in the pressurized container 30 of the example application example shown in FIG. total area as seen by comparing the characteristic line of a specific example of 126 mm ^2, the total area of the cutout K is formed in the partition plate 34 in the embodiment of application example 126 mm ² pressure vessel 30 and the notch K of In the third development example having a total area of 90 mm ² , the shape of the notch K is substantially triangular like the pressurized container 30 of the example application example even at the same water flow rate. Thus, it was found that an improvement in the stirring effect of water can be expected.

In the third development example, the length of the air layer, the length of the bubble layer, and the turbidity were examined by variously changing the area of the notch K (the area in the plate surface direction of the partition plate 34). In this study, tests were performed at a flow rate of 6 liters / minute to 7 liters / minute, corresponding to a fluid number of 3.2 to 10.7. The fluid number is 3.2 when the total area of the gap is 180 mm ² and the flow rate is 6 liters / minute (flow velocity 550 mm / second ÷ limit flow 171 mm / second = 3.2). 10.7 is obtained when the total area of the gap is 90 mm ² and 7 liters / minute (flow rate 1296.3 mm / second ÷ limit flow 121 mm / second = 10.7). Among the first development examples to 3, the maximum value of the fluid number is 10.7, and it is estimated that the fluid number when air is not removed (when mixing air) is larger than this value. Even during mixing, the square of the fluid number is considered not to exceed 1000 (fluid number of about 32).

In this examination, the results when the flow rate of water injected into the tank 31 is 6.5 liters / minute are shown in FIGS. 30 shows the total area of the plurality of cutouts K as 90 mm ² (30 cutouts K having a width of 2 mm × depth of 1.5 mm are arranged), and FIG. 31 shows the total area of the plurality of cutouts K as 120 mm ^2. (30 notches K having a width of 2 mm × 2 mm in depth are disposed), and FIG. 32 is a total area of the plurality of notches K being 180 mm ² (30 notches K having a width of 2 mm × depth of 3 mm are disposed). In all cases, the total area of the notches K is larger than the cross-sectional area of the injection port 32 of 50 mm ² . In each figure, the characteristic line a indicates the length of the foam layer, the characteristic line b indicates the length of the air layer, and the characteristic line c indicates the turbidity.

  Moreover, in FIG.30, FIG.31, FIG.32, the value after 3 minutes and the value after 4 minutes are shown in (Table 6)-(Table 8), respectively.

  33, in the third development example, the flow rate of water injected into the tank 31 is 6 liters / minute, and the total area of the plurality of notches K (that is, the partition plate 34 and the inner peripheral wall of the tank 31). The ratio of the length of the air layer to the length of the foam layer (air length / foam length) when the total area of the gap is changed is shown in the characteristic line a, and the average turbidity is shown in the characteristic line b. ing. The ratio of the air length / bubble length indicated by the characteristic line a tends to increase as the total area of the plurality of notches K increases, and the turbidity average value indicated by the characteristic line b indicates the plurality of notches K. It shows a tendency to decrease as the total area increases.

In this examination, the examination result in the total area of 120 mm ² is considerably smaller than the value in the total area of 90 mm ² in both the ratio of air length / bubble length and the turbidity. It is considered that the ratio of length / bubble length increases proportionally as shown by the characteristic line a ′, and the turbidity average value decreases proportionally as shown by the characteristic line b ′. By forming the total area of the plurality of notches K so as to be the gap area at the intersection of these characteristic line a ′ and characteristic line b ′, the balance between the ratio of air length / bubble length and turbidity was excellent. It is considered that the pressurized container 30 is formed.

Further, in FIG. 34, the third in the development embodiment, when the total area of the plurality of notches K and ^{90mm 2, 120mm 2, 180mm 2} , the relationship between the flow rate and flow velocity of the water injected into the tank 31 The result of the examination is shown. The characteristic line a is the result of examination when the total area of the notch K is 90 mm ² , the characteristic line b is the result of examination when the total area of the notch K is 120 mm ^2, and the characteristic line c is the total area of the notch K This is the result of the study when the value is 180 mm ² . As shown by these characteristic lines, the flow rate with respect to the flow rate of water injected into the tank 31 varies depending on the total area of the notch K. Therefore, the flow rate depends on the ratio of air length / bubble length and turbidity. It seems to be related to the value.

In the third development example, when the total area of the gap between the notch K and the inner wall of the tank is 90 mm ² , the flow rate is the fastest. 1100 mm / second, critical flow velocity 121 mm / second, fluid number 9.1 (flow velocity 1100 mm / second ÷ limit flow velocity 121 mm / second), fluid number / flow velocity = 9.1 / 1100 = about 0.0082, critical flow velocity / The total area of the gaps S = 121/90 = about 1.3.

  Further, in the third development example, in order to further increase the turbidity, in order to increase the flow rate of the water passing through the gap (notch K), the thickness of the water flow must be less than 1.5 mm. However, it has been found that if the depth of the notch K is formed to be narrower than 1.5 mm, the requirement (C) is not satisfied.

  Regarding the first to third development examples as described above, the flow rate of water introduced into the pressurized container 30 and the mode of air layer formation or air layer non-formation are summarized as shown in the following (Table 9). It becomes like this.

  In Table 9, ○ indicates that the air layer is formed, × indicates that the air layer is not formed, and Δ indicates that the air layer is not formed depending on the time of introduction of water. It shows that it is a mode that shifts from formation to air layer formation.

  By the way, in the aspect in which the plurality of notches K are arranged with a space between each other as in the pressurized container 30 of the application example of the embodiment and the third development example, If it flows down with the same width as the bottom of the notch K (the length in the circumferential direction of the tank, and the pressurized container 30 of the application example of the embodiment, see W in FIG. 4D), the inner wall of the tank In this case, there is a portion where no water flows at a position corresponding to the interval between the notches K of the partition plate 34. However, during the flow of water along the surface to be added on the inner peripheral wall of the tank, for example, in the pressurized container 30 of the application example of the embodiment, as shown in FIGS. It collapses and spreads, and also spreads to a portion where there is no flow (that is, a portion where a flow should not be formed). From this, when the first to third development examples are compared, the third development example has a large rate at which the speed of the water falls during the flow of the water (speed reduction rate of the second development example <first It is considered that the speed reduction rate of one development example <the speed reduction rate of the third development example).

  Therefore, the inventor of the present application thought that the turbidity could be increased without reducing the thickness of the water flow if the resistance during the flow of the water and the rate at which the speed drops are reduced. That is, on the basis of this consideration, the application example of the embodiment is to reduce the water collapse to the portion where the water that should fall through the notch K and fall to the lower side of the partition plate 34 should not be formed. Also, the notch shape was triangular.

  That is, the requirement (B) that summarizes the requirements for the pressurized container 30 may be the requirement (B ′) described below. (B ′) In order to increase the turbidity, it is preferable that the rate of decrease in the speed of water flowing down from the upper side to the lower side of the partition plate 34 is preferable. A shape with little water collapse from a certain portion to a portion where a flow should not be formed is desired. For example, in an embodiment in which a plurality of notches K are arranged with a space between each other, a shape with less water collapse to the space between the notches K is desired.

  That is, the water that flows down from the upper side of the partition plate 34 through the notch K (through the gap between the notch K and the inner wall of the tank 31) is also applied to the portion where the flow should not be formed. If we consider the notch shape to prevent it from spreading, we can't expect any further improvement in performance by examining the development example (the rectangular shape as in the third development example can't be expected to improve performance). Therefore, the shape of the notch K has been made triangular.

  In other words, in the pressurized container 30 of the application example of the embodiment, the shape of the notch K is substantially triangular, so that the thickness of the water flow is not smaller than 2 mm (0.002 m) (requirements necessary for the pressurized container) The water collapse from the portion where the flow is formed by the notch to the portion where the flow should not be formed can be reduced (necessary for the pressurized container) The requirement (B ′), which is one of the essential requirements, can be satisfied). Further, assuming that the critical flow velocity is 140 mm / second, the total area of the gap can be changed without changing this value.

Moreover, in the specific example of the pressurized container 30 of the embodiment application example, the flow rate of water is 5 to 7 liters / minute, but when the flow rate is about 6 liters / minute, which is the middle flow rate, The fluid number when the total area is 63 mm ² is 11.3 (flow rate 1587 mm / second ÷ limit flow rate 140 mm / second), and the fluid number when the total gap area is 126 mm ² is 5.7 (flow rate 793 mm / second). In this case, the fluid number is 5.7 to 11.3, which satisfies the requirement (A), which is one of the requirements for the pressurized container. Further, the water that has passed through the notch K flows down along the surface to be added of the inner wall surface of the tank 31 and can satisfy the requirement (D) that is one of the requirements for the pressurized container.

In the specific example of the pressurized container 30 of the application example of the embodiment, when the total area of the gap formed by the notch K is 63 mm ² and the flow rate is 7 liters / minute, the fluid number is 13.1. Thus, although the fluid number at this time becomes the maximum in each of the specific examples of the application example of the embodiment, it is estimated that when the air is not removed (in the case of air mixing), the fluid number is larger than this value. However, since the square of the fluid number is considered not to exceed 1000 (fluid number of about 32), the condition (A) is satisfied. The flow rate varies depending on, for example, the piping distance, for example, 6.5 liters / minute ± 0.5 liters / minute. For example, when the total area of the gap is 78 mm ² or less, the flow rate is 6 Under any condition of ˜7 liters / minute, the fluid number is 9 or more (excluding air). As described above, the pressurized container 30 of the example application example can satisfy all the requirements (A) to (D) required for the pressurized container.

  In addition, since the above-mentioned water collapse is less likely to occur when the flow rate is high, it is necessary to flow down water at a flow rate (or flow rate) higher than a predetermined level at which the water collapse does not increase. In other words, the water collapse that forms the air layer A is large. Recognizing the flow rate range (or fluid number range) and the flow rate range (or fluid number range) where water collapse that does not create the air layer A is small, control in each flow region, that is, in the device with the fine bubble generation function, It is desired to control switching between the undissolved air layer formation mode and the air layer non-formation mode.

  Furthermore, the inventor of the present application also paid attention to the Reynolds number and the amount of gas dissolved in the liquid layer peculiar to the gas-liquid two-phase mixed layer flow. That is, the Froude number is obtained by dividing the flow velocity by the limit of turbulent flow and laminar flow (the flow velocity is limited flow or the critical flow velocity), so the Reynolds number is divided by the limit of turbulent flow and laminar flow (limit Reynolds number). Although it should be possible to obtain a value (ratio or magnification) for the same limit (boundary between laminar flow and turbulent flow), this value is different between the development example and the application example of the example. It is thought that there is.

To elaborate on this point, it is already known that the limit Reynolds number changes if the flow conditions are different. Therefore, it is considered that the cause of the difference is that the flow condition classification is different. That is, for example, when the total area of the notch K of the third development example is 90 mm ² and the total area of the notch K of the application example of the embodiment is 126 mm ² , the same behavior is exhibited. The number of fluids is completely different. Therefore, it is considered that Reynolds number is involved in this condition. That is, it is considered that even if the Froude number is the same, the jump shape classification changes depending on the Reynolds number, or even if the Froude number is different, the jump shape classification is the same depending on the Reynolds number.

That is, as shown in FIG.
AJ, The hydraulic design of stilling basins: hydraulic jumps on a horizontal
apron (Basin I), paper1401, Journal of the Hydraulics Division, ASCE,
Vol.83, No.HY5,1957, pp.1-24), for example, is a jumping shape classification for muddy river turbulent flow, unpressurized, open to the upper atmosphere, and in the case of a single liquid phase The relationship between the Froude number and the classification of jumping water according to the Froude number is shown. Since this jumping shape classification is a jumping shape classification with a Reynolds number as high as, for example, tens of thousands, Reynolds as described above. In contrast to this, in the case of the jump shape classification below a stream such as a depth of several millimeters, the Reynolds number is as low as several thousand, such as the pressurized container 30 of the embodiment application example. Therefore, it is considered necessary to investigate the Reynolds number.

  In other words, in the case of a river flow, as shown in FIG. 42 (a), a small amount of water is affected by the walls such as the riverbed and the revetment wall (water flowing strongly under the influence of the viscosity is applied to the walls). When the water passes through the notch K as in the pressurized container 30 of the application example of the embodiment, as shown in FIG. After that, the bottom of the triangle shape flows along the inner peripheral wall of the tank, and the thickness of the water flow along the surface to be added of the inner peripheral wall of the tank is as thin as 0.002 m, for example. In the case of being strongly influenced by the wall surface (influence of viscosity), it is considered that there is a specific classification of water jump phenomenon.

That is, the Reynolds number is obtained by a value obtained by dividing “4 × (flow product × average flow velocity) / wet side” that is the inertial force of the flow by the “dynamic viscosity coefficient” that is the viscous force of the flow (Reynolds number = (Average velocity [m / s] x typical length of flow field [m]) ÷ kinematic viscosity coefficient [m ² / s] However, in the case of an open channel, Reynolds number = 4 x (flow product [ m ² ] ÷ Junbe [m] × average flow velocity [m / s]) ÷ kinematic viscosity coefficient [m ² / s]. The flow product is also called the flow cross section or river product, and is simply called the cross section. In some cases, the Reynolds number is also considered to change when the flow of water is greatly affected by viscosity (a large viscosity). In the pressurized container 30 of the example application example, the wet side is the side of the surface that touches the surface to be added to the inner peripheral wall of the tank when the water flow falls through the notch K (flows down), and the cross-sectional area is This is the area of the substantially triangular cutout K (base x height / 2).

  When the wet side of “4 × (flow product × average flow velocity) / wet side” indicating the degree of inertia of the flow, which is the numerator in the equation for calculating the Reynolds number, is relatively small (that is, when the Reynolds number is large) ) Applies to jumping shape classification (wave jump, weak jump, vibration jump, steady jump, strong jump) in one liquid layer (see FIG. 20, FIG. 22 (a)) If the effect of the increase becomes larger, it is considered that the amount of energy required for each occurrence of water jump becomes more necessary (a larger fluid number is required).

For example, steady water jumping is common (when the Reynolds number is high, for example, tens of thousands or more according to the shape of jumping water in a river) Exhibit: Journal of Japan Society of Fluid Mechanics "Nagare" Vol. 29
(2010) 167 In Japanese rivers, the Reynolds number ranges from 10 4 to 10 8
It is said that it occurs when a turbulent flow of 4.5 to 9 upstream fluid number (also referred to as inflow fluid number) changes to laminar flow. On the other hand, in the case of the pressurized container 30 of the embodiment application example in which the influence of the viscosity (viscosity) seems to be large (when the Reynolds number is as low as several thousand, for example), for example, as shown in FIG. Thus, it is considered that the minimum Froude number (generally referred to as 4.5) for steady jumping is 6.2 or more, for example, 6.5, which is necessary for steady jumping. It is considered that a fluid number of 6.2, which is larger than the typical minimum energy amount 4.5, is required (see level 4 in FIGS. 23A and 23B).

  Similarly, vibrational jumping (sometimes translated as shaking jumping) occurs when the upstream fluid number is 2.5 or more in the general case described above, whereas the influence of viscosity is large. In the case of the pressurized container 30 in the application example of a possible example, it is considered that the occurrence occurs when the upstream fluid number becomes about 3.4 or more. Furthermore, similarly, weak flow jump water (sometimes translated as weak water jump) occurs when the upstream fluid number is 1.7 or more in the general case as described above, while the influence of viscosity. In the case of the application example of the embodiment that seems to be large, for example, it is considered to be about 2.3 or more. Similarly, strong jump water is generated when the upstream fluid number is 9 or more in the general case as described above, but in the case of the application example of the above embodiment where the influence of viscosity seems to be large. In the case where the influence of the water collapse is not considered, it is considered that, for example, it occurs at about 12.4 or more.

  That is, for example, when a turbulent flow (spout) with an upstream fluid number of 2.7 for generating a jumping phenomenon (laundry flow) changes to a laminar flow, jumping occurs. In the case of a general river, which depends on the influence of viscosity, it is vibration jumping. However, in the pressurized container 30 of the application example of the embodiment, there is not enough energy to reach vibration jumping and weak flow jumping. It is considered to be.

  Next, the involvement of the dissolved gas amount in the liquid layer unique to the gas-liquid two-phase mixed flow will be described in detail. In the case of the flow rate of 7 liters / minute in the second development example (see FIG. 27, characteristic line f), the air layer is not formed (the air layer length is 0 cm) until 1 to 3 minutes from the start of operation. After 4 minutes, it changes to the formation of an air layer (the length of the air layer is 3 cm). As a result of considering this state, at the beginning of the discussion, the bath water was already dissolved by the operation for 3 minutes from the start of operation, and after 4 minutes from the start of operation, the bath water in which the air was already dissolved was removed. From the situation where you are inhaling and trying to dissolve air in that water, if you already have a certain amount of air in the water that you want to inhale after a certain time, it can be dissolved no matter how much you want to dissolve It was thought that an air layer would begin to form (solubility problem).

  However, if it is a problem of solubility, not only in the second development example but also in the example and other development examples, the same situation (the air layer is not formed from the start of operation until a certain time, and after that time the air layer is not formed. A similar situation is not seen for the example and other developments, although the situation where the layer is formed) should be seen. In other words, the results other than the second development example show that, regardless of the time from the start of operation, the air layer is formed immediately after the start of operation and the air layer is continuously formed, or the air layer is immediately after the start of operation. Either it is not formed and the state continues. In addition, since the air dissolved in water is released as white turbidity (bubbles) when released into the bathtub, it seems that the situation that changes to the formation of an air layer 4 minutes after the start of the operation is not a problem of the solubility. Became.

  Therefore, the situation in the second development example (a situation where an air layer is not formed partway through the start of operation and an undissolved air layer is formed partway) straddles the boundary of the jump shape classification during operation. The present inventor believes that the situation may have changed. In detail, in the second development example, the lower surface of the table plate portion 28 is a surface to which water passes, and the influence of gravity and Bernoulli's theorem (exactly the Coanda effect: (decelerates due to viscosity in the boundary layer). 20))), the influence of the viscosity, which is considered to be the influence of the wall surface (attached surface), is canceled, and it is considered that the boundary occurs at the same fluid number as the river flow (point B2 in FIG. 20). ,reference).

  That is, in the second development example, after passing along the surface to be attached (see B in FIG. 26E) under the table plate portion 28, the center portion of the tank 31 is passed through the through hole 29. On the lower side of the tank 31. The lower side of the tank 31 falls without being attached (falling through the center of the tank without being affected by the effect of the accessory surface (viscosity)). The situation that occurs in the second development example because it is configured to reach the water surface of the water (the situation in which the air layer is not formed until 1 to 3 minutes from the start of operation and changes to the air layer formation after 4 minutes from the start of operation) In the above consideration, it is considered that the jump shape classification shown in FIG. On the other hand, as in the pressurized container 30 of the first development example, the third development example, and the application example of the embodiment, for example, when flowing down on a substantially vertical wall surface, since there is no reduction action due to gravity, It is considered that the boundary occurs at different fluid numbers (the increase in the fluid number is caused by the viscosity).

In the second development example, when the flow rate is 7 (liters / minute), the gap (cross-sectional area) is 152.4 (mm ² ), the flow velocity is 765.5 (mm / second), and the gap height is 3 (mm), the fluid number Is considered to be 4.5. The value of the fluid number 4.5 is a value (boundary value) at which the steady jump and the vibration jump are switched in the jump shape classification shown in FIG. 23A (that is, any state of the steady jump and the vibration jump). It is estimated that the air layer was not formed because it was a class of steady jumping that occurred when the fluid number was in the range of 4.5 to 9 from the start of operation to 1 to 3 minutes. . On the other hand, after 4 minutes from the start of operation, the amount of dissolved gas (here, air) in the liquid layer (here, water) increases, so that, for example, the fluid number ranges from 2.5 to 4.5 for the following reasons. It is thought that the air layer began to form because of the vibration jumping that occurred at the time.

  In other words, since air is more viscous than water, the kinematic viscosity coefficient (viscosity coefficient / density) is large, and it is considered that the kinematic viscosity coefficient increases as the air dissolves into the liquid side of the gas-liquid two-phase mixed flow. As a result, the amount of energy required for each occurrence of water jumping moved to the more necessary side. As a result, a steady water jump occurred at a fluid number of 4.5. It is thought that it became a vibration jump at 4.5.

  The highest turbidity in the air layer formation state is that the flow rate just before the air layer is not formed (when the fluid number has the size and shape of the tank 31 of the example application example, The flow rate just before the fluid number, which is the boundary for steady water jumping), but when the amount of dissolved gas in the liquid layer increases, the influence of water viscosity increases, and the flow rate required to change the water jumping phenomenon. (Boundary fluid number) increases. From this, the amount of dissolved gas in the liquid layer is predicted using factors such as operating time, the number of boundary fluids that changes depending on the predicted value of this dissolved air amount is estimated, and the dissolved amount of air increases as the operating time elapses. When the boundary fluid number increases, the flow rate of water introduced into the pressurized container 30 is increased corresponding to the boundary fluid number, and the air layer formation state is maintained, while the turbidity is also present in the air layer formation state. It is also conceivable to carry out control to make the state of high (close to the state of highest turbidity by setting the flow rate close to the flow rate corresponding to the boundary fluid number).

  Here, when the shape of the notch K formed in the partition plate 34 of the pressurization container 30 is substantially triangular, the jumping shape classification according to the fluid number is summarized in the configuration of the pressurization container 30 of the embodiment application example. It is conceivable that a) to (c).

(A): the liquid layer (in this case water) regardless of the gas (here air) dissolved amount to, in each embodiment of the total area of 126 mm ^2, 105 mm ² notch K, Froude number 6.24 Thus, a water jump phenomenon that does not form the air layer A occurs. Since this phenomenon does not occur at a fluid number of 6.14 or less, it is considered that there is some kind of boundary between the fluid numbers of 6.14 to 6.24 (about 6.2). In the case of the pressurized container 30 of the application example of the embodiment, the boundary between the vibration jump and the steady jump that is said to be specifically formed is formed around a fluid number of 6.14 to 6.24 (about 6.2). It is considered a thing. Incidentally, the as, in the specific example of a total area of 63 mm ^2, 84 mm ² notch K, greater distance K between notch compared to Examples total area of 105 mm ^2, 126 mm ² notch K As a result, the number of fluids at the boundary is large. Even when the total area of the notch K is 63 mm ² and 84 mm ² , the total area of the notch K is cut as in the specific examples of 105 mm ² and 126 mm ^2. If the gap between the notches K is made small, the fluid number at the boundary is about 6.2.

On the other hand, with the total area of 90 mm ² of rectangular cutouts K in the third development example and a flow rate of 7 liters / minute (fluid number 10.69), in the pressurized container 30 of the example application example, Since it flows down along the surface to be attached for the same distance as the specific example with a total area of 126 mm ² , the effect of viscosity should be the same (the boundary between the vibrational jump and the steady jump is around 6.14-6.24). The air layer A is still formed (vibrating water jump) even with a fluid number of 10.69.

  From this, the pressurized container 30 of the example application example has a lower flow rate, a lower fluid number, and a lower notch shape compared to the third development example in which the notch shape is a rectangular shape by making the notch shape a substantially triangular shape. It can be seen that high turbidity can be expected even with a low-capacity pump. In other words, in the application example of the embodiment, the notch formed in the partition plate of the pressurized container is formed into a substantially triangular shape, and the notched with an inclination (because it has a configuration requirement (E) to be described later). Even with a low flow rate, low fluid number, and low capacity pump, high turbidity can be expected. Details of this will be described later.

(B): In the pressurized container 30 of the application example of the embodiment, in the case where the total area of the notch K is 63 mm ² , 84 mm ² , 105 mm ² (that is, in the specific example of the pressurized container 30 of the application example of the embodiment, If a total area of 105 mm ² or less), the flow rate of the water introduced into the pressure vessel 30 is in a 5 l / min to form an air layer a, since it does not form an air layer a is 5.5 liters / minute, triangular In the case of a notch having a bottom of 3.5 mm, a height of 2 mm, and an area of 3.5 mm ² , the air flow is reduced while the flow rate is reduced from 5.5 liters / minute to 5 liters / minute. It is thought that the water collapse which forms the layer A occurs (it is considered that there is “the influence of further viscosity”). That is, it is considered that there is a “some boundary” in the classification of the jumping phenomenon between the flow rate of water introduced into the pressurized container 30 between 5 liters / minute and 5.5 liters / minute.

Regarding the “additional viscosity effect” at the “some boundary”, the present inventor, when the water flow is slow, the water flow collapses while the water flow is flowing down from the notch to the water surface, and contacts with the surface to be added. Although the number of contact surfaces increases, it is analyzed that there is a limit to the increase of the contact surface because the contact surface increases and the water flow in the adjacent notch comes into contact. That is, as the total area of the notch K becomes 63 mm ² → 84 mm ² → 105 mm ² → 126 mm ² , the distance between the notches (the distance between the notch K and the adjacent notch K) is 4.35 mm → 2. 39 mm → 1.21 mm → 0.43 mm and less, since the direction of notches total area 63 mm ² of K there are many water collapses room, but may be increased contact surface ratio to what is short notch distance Therefore, it is thought that it is more susceptible to viscosity.

  (C): For example, in the tank shape of the pressurized container as shown in the application example of the embodiment, the flow rate of water introduced into the pressurized container 30 is set to a flow rate larger than 5 liters / minute, and the fluid number is set to 6. The air layer A can be eliminated by making it larger than 14, while the air flow rate A can be reduced by reducing the flow rate to less than 5.5 liters / minute or reducing the fluid number to less than 6.24. Can do. That is, the flow rate of water introduced into the pressurized container 30 is a flow rate that forms the air layer A, and the maximum value of the flow rate at which the water collapse occurs is determined by the tank shape. If the fluid number is larger than the fluid number corresponding to the jump shape classification that does not create the air layer A, the air layer A of undissolved air disappears in the pressurized container 30. On the other hand, the air layer A is not formed by making the air layer A smaller than the minimum flow rate at which water collapse does not occur, or by making the fluid number smaller than the fluid number corresponding to the jump shape classification that creates the air layer A. Either can be controlled selectively. That is, the air layer A can be created or eliminated by controlling the flow rate (or flow rate and fluid number).

  It is considered that there is a difference in underwater jumping phenomenon depending on the water flow velocity (or fluid number), and in the apparatus with the function of generating fine bubbles to which the pressurized container 30 is applied, the above-mentioned requirement (required for the apparatus) As described in F), it is necessary to control the dedicated air introduction valve 38 in the flow rate range (or Froude number range) that creates the air layer A and in the flow rate range (or Froude number range) that does not create the air layer A. is there. Note that even if the filter is normally operated in a flow rate range in which the air layer A is not formed, the air layer A is formed when the filter 54 is clogged. Therefore, the relationship between the power consumption and the rotational speed of the circulation pump 21 Therefore, it is necessary to switch the air introduction valve control method in anticipation of the filter 54 being clogged.

  Further, according to the general jumping phenomenon classification, for example, even when the air is not removed, when a jet having a fluid number of 9 or more becomes a normal flow, as shown in FIG. Although it is considered that a phenomenon called (or strong jumping water) occurs, the shape and dimensions of the tank 31 of the application example of the embodiment (from the portion (for example, the partition plate 34) that causes water to flow down into the tank 31 as a jet) At the lower end (for example, the outlet port 33) of 15cm and the tank diameter (inner diameter Φ4.5cm)), the air layer A is not formed at the stage from the vibrational jump to the steady jump, so the steady jump creates the air layer A. Not considered to be a powerful jumping water. Further, the pressurized container 30 of the application example of the embodiment is an aspect that reaches the water surface of the water in the tank 31 almost without being affected by the viscosity as described above when the water falls, as in the second development example. Unlike water, when water falls along the inner wall of the tank 31, it is greatly affected by viscosity. Therefore, the jump shape classification shown in FIG. It is thought that it is good to do.

Note that in the pressure vessel 30 of the embodiment applications, cut with lack Examples total area of 63mm ^2, 84mm ^2, 105mm ² of K, 5.5 liters / min controlled flow rate when not to make an air layer A Although it is not so much as what receives the "influence of the further viscosity" considered to be the cause of the said water collapse by having set it as the above, it received the influence of the viscosity considered to be the cause of the influence of a tank wall surface in FIG.23 (b) It is considered that the jump shape classification as shown is applied. Although details will be described later, in a specific example in which the total area of the notches K of the pressurized container 30 of the application example of the embodiment is 126 mm ² , the influence of further viscosity is also affected when the water flow rate is 6.5 liters / minute. However, in this specific example, since the plurality of notches K are not formed with a large interval, the water collapse is limited, which is considered to be caused by the water collapse. It is thought that “influence” is not so much.

In FIG. 6B, the average turbidity is highest when the total area of the gap (total area of the notch K) is 63 mm ² (because the total area of the gap is smaller than 78 mm ² ). This is thought to be due to the occurrence of a strong water jump that exceeds the steady jump. That is, when the flow velocity increases, as shown in FIG. 19B, the ground contact length with the inner wall of the tank reaches the surface of the stored water, so that the boundary between steady jump and strong jump water falls, and the flow rate of water It is thought that even at 6 liters / minute, it reaches the zone where strong water jump occurs.

As described above, in the pressurized container 30 of the application example of the embodiment, when the total area of the notch K (the gap between the notch K and the inner wall of the tank 31) is 63 mm ² It is thought that the strong flow jump) has occurred, but in actuality, since the flow rate is increased by the apparent flow velocity (WGO) of the air, in the pressure vessel of the same size as the pressure vessel 30, the gap Even if the total area of the water is slightly larger than 63 mm ² (WGO, because the flow velocity becomes faster and the viscosity is less affected by the viscosity, the total area of the gap is larger) ) Is considered to occur.

  Further, according to the condition (B), which is one of the requirements for the pressurized container, that is, in order to increase the turbidity, it is preferable to increase the speed of water flowing down from above the partition plate 34. Therefore, in the pressurized container 30 of the application example of the embodiment, it is considered that it is particularly effective to increase the flow velocity so that the fluid number becomes a value larger than 6.2 (for example, 6.14) in a state where air is not removed. It is done. (It is considered effective because steady or strong water jump occurs.) The fluid number in the state where air is not removed is 4.5 or more in the case of the second development example, and the pressure vessel of the third development example. In some cases, a value larger than 10.69 is considered to be particularly effective, and when the size of the pressurized container is set to a size such as a large drum size like a pool, the pressure is increased. Since it is not strongly restricted by the height direction of the container 30 (necessary to consider the length of bubbles submerged below the surface), it is considered particularly effective if the upstream fluid number is increased to create a region where strong water jump occurs. It is done.

  The fluid number is determined by the vertical distance from the base (the thickness of the water flow) with the surface to which the water flow is added as the base (the thickness of the water flow). The prevention of clogging is determined by the distance in the vertical direction from the bottom, and if this value is, for example, 1.5 mm or more, clogging can be prevented. Therefore, the above-mentioned requirements (B) and (C) that are necessary for the pressurized container In order to satisfy this condition, it is only necessary to pay attention to the vertical distance (water flow thickness). On the other hand, with regard to turbidity, if the flow rate is the same, the smaller the total area of the gap, the faster the flow velocity. Therefore, attention should be paid to the total area of the gap.

  For example, in the third development example, the shape of the gap is substantially square. Therefore, if the vertical distance (water flow thickness) is set to a fixed value of 2 mm, for example, the total area of the gap is the surface to be added. Proportional to base length. In the first development example, the inner diameter of the tank is 45 mm, the outer diameter of the partition plate 34 is 42 mm, and the total area of the gap is ((Φ45 / 2) × (Φ45 / 2) × 3.14) − ((Φ42 / 2) × (Φ42 / 2) × 3.14) = 204.885 = 0.97 × (Φ45 × 3.14 × 1.5), that is, the total area of the gap = (0.97 ) × (base) × (height), and can be regarded as a substantially rectangular shape. In the second development example, it can be regarded as a substantially rectangular shape having the outer periphery of the table plate portion 28 (excluding the formation portion of the leg portion 65) as the bottom and the gap t as the height.

  On the other hand, in the case of the pressurized container 30 of the application example of the embodiment, the notch K formed in the partition plate 34 has a substantially triangular shape, so that the total area of the gap is ½ of the bottom of the notch K. Proportional (triangle area = (1/2) × (base) × (height)). That is, when the vertical distance (water flow thickness) and the base length of the attached surface are fixed, in the first to third development examples to 3, the total area of the gap is approximately the base and height of the square. Correspondingly, in the case of the pressurized container 30 of the application example of the embodiment, the total area of the gap is a multiple of the base of the triangle and the height × ½ (the number of triangles), so The total area can be reduced while keeping the distance (thickness of the water flow) large (in other words, in the pressurized container 30 of the application example of the embodiment, other than the triangular cutout portion (cutout K) of (a)). It can be said that the portion U can be removed outside the water flow path), and the turbidity can be increased because the flow velocity can be increased.

Further, in the pressurized container 30 of the application example of the embodiment, in order to reduce the total area of the gap (total cutout area), the total area is changed to 102 mm ² → 84 mm by changing the number of substantially triangular shapes as described above. ^{Although 2} → 63 mm ² , this is substantially the same as changing the base length of the triangular shape of one notch K, for example, as compared with FIG. 37 (a) and FIG. 37 (i). is there.

  In the specification of the present application, the meaning that the shape of the water passage portion formed by the notch or the through-hole or the water flow passing through the water passage portion has a substantially triangular shape is as shown in FIG. In addition, as shown in the hatched portion in each of FIGS. 37 (b) to (q), the shape is such that the total area can be reduced while maintaining the height = the distance in the vertical direction (the thickness of the water flow). And a trapezoidal shape having at least one side (including a gently curved side) of 90 degrees or less with respect to a bottom portion (B in the figure) that is a surface to be attached. Further, the substantially triangular base portion is not limited to a straight line, but is used in a broad sense including a curved side or a refracted side protruding outward (for example, FIG. 37 (n) to FIG. 37). (Refer to B in (q)), the substantially triangular shape refers to a shape that is reduced in diameter (tapered) toward the front end side in the height direction with respect to the bottom portion thereof.

  In FIG. 37 (j), the width of the upper arc is wider than that of FIG. 37 (f) and the arc is enlarged in the vertical direction (the upper base of the trapezoidal shape of FIG. 37 (b) is expanded, FIG. 37 (k) shows a case where the lower side 2/3 of FIG. 37 (j) is changed from a straight line to a gentle arc, and FIG. 37 (l) shows a case where FIG. FIG. 37 (k) shows a sharpened upper third and FIG. 37 (m) shows a pentagon divided into two equal parts.

  In the pressurized container 30 of the application example of the embodiment, the shape of the notch K is a substantially triangular shape, so that the portion in contact with the interval between the notch K and the adjacent notch K, that is, the portion in contact with the flow of the adjacent water flow. Moreover, it is considered that the interval can be made more effective by having a structure (inclined gap structure) in which the ratio of water flow can be made smaller than in the case of a rectangular cutout. The reason will be described below.

  As described above, in the configuration in which water falls along the inner wall surface of the tank 31 as in the pressurized container 30 of the application example of the embodiment and the first and third development examples, the inner wall surface as described above. The relationship between the fluid number and the jump shape classification is not affected by the viscosity due to the influence of the viscosity that is considered to be caused by the influence given to the water from FIG. It is thought that it changes like b).

  In addition, the formation of the air layer A is influenced by whether the falling water is caused by vibrational jumping or steady jumping. Therefore, the pressurized container according to the application example in which the shape of the notch K is substantially triangular. 30, it is considered that there is a boundary that affects the formation of the air layer A between the fluid numbers of 6.14 to 6.24 (about 6.2), whereas the rectangular shape of the third development example is In the case of the lack K, this boundary does not appear even when the fluid number reaches 10.69. As a cause of this, in the application example of the embodiment, the notch shape formed in the partition plate is a substantially triangular shape, and it is considered that the inclination in the thickness direction of the notch K is a point compared to the rectangular notch. It is done. In other words, the notch K having a substantially triangular shape is often the other two sides are oblique with respect to the base of the notch K, and is also left in a right triangle where the angle between the base and the other side is a right angle. Therefore, the substantially triangular notch K is inclined with respect to the bottom of the notch K, unlike the rectangular notch.

  In other words, as if making a sand pile with a substantially vertical surface, the vertical surface is easy to collapse, whereas an inclined sand mountain is difficult to collapse, and even if it breaks down, the degree is light, By making the notch shape into a substantially triangular shape, the portion of the portion in contact with the interval between the notch K and the adjacent notch K, that is, the portion in contact with the flow of the adjacent water flow remains small (the contact with the flow of the adjacent water flow). By keeping the water from flowing between adjacent water flows and keeping it as a space, the flow of the water flow body is less susceptible to the influence of viscosity due to water collapse. I think it can be done. In other words, in the pressurized container 30 of the application example of the embodiment, the gap is more effective by having an inclined gap structure that makes the flow of the water flow body less susceptible to the influence of viscosity due to water collapse as described above. It is thought that it can be made (constituent requirement (E) required for a pressurized container).

The above concept that the shape of the water flow passing through the notch K gradually collapses can be easily understood by referring to the schematic diagrams shown in FIGS. 19 (a) and 19 (b). That is, the number of fluids flowing out of the notch K formed in the partition plate 34 (the number of fluids or the number of upstream fluids in the present specification unless otherwise specified) is shown in FIGS. 19 (a) and 19 (b). This is the value at point C. Actually, the time it takes for the water to reach the water surface stored under the partition plate 34 due to water collapse (for example, 0.05 seconds when the air length is 4 cm and the flow rate is 800 mm / s) In the meantime, as shown in FIG. 19 (a), the height h (2 mm, for example) of the water flow is broken like h ₀ → h _A1 → h _A2 → h _A3 . ), It is thought that it collapses like h ₀ → h _B1 → h _B2 → h _A3 . For this reason, the contact length between the water and the inner wall surface of the tank 31 is increased, and the influence of the viscosity is increased. Therefore, the rank of the jump shape classification is lowered (the energy released when the normal flow is reduced). The direction is less likely to become cloudy).

  That is, as shown by the broken line in FIG. 21 (b), in the pressurized container 30 of the application example of the embodiment, if it is not affected by the viscosity accompanying the collapse of the water flow as shown in FIG. It is considered that the straight line i passing through the boundary f with the steady jump with a fluid number of about 6.2 is a line connecting the boundary values of the respective jump categories. It should pass at about 12.4. Since the fluid number is based on the fluid number of the water stream coming out of the notch K (upstream fluid number), the height h of the water stream is the same for the fluid number 6.2 and the fluid number 12.4 (the limit flow velocity is the same). ) And the difference in fluid number is the same as the difference in flow velocity. Therefore, when the fluid number is 6.2, the flow velocity of the water flow from the notch K is 868 mm / s (6.2 × 1000 × √ (9.8 × h ÷ 1000 )), The water is directed to the water stored under the partition plate 34. When the fluid number is 12.4, the flow rate is doubled.

Therefore, when the fluid number is 6.2, as shown in FIG. 19 (a), for example, the height h (for example, 2 mm) of the water flow collapses as h ₀ → h _A1 → h _A2. Then, since the flow rate is fast in the case of fluid number 12.4, the height h of the water flow collapses as h ₀ → h _B1 → h _B2 ... As shown in FIG. Thus, h _B3 > h _A3 , and it is considered that the water surface is reached with a slight collapse compared to the case where the flow velocity is slow.

  If the water collapse is small, the rate of increase in the contact surface between the tank-attached surface and the water flow is smaller in the state shown in FIG. 19B than in the state shown in FIG. Therefore, “the wetted length when reaching the water surface when the fluid number is 6.2”> “the wetted length when reaching the water surface when the fluid number is 12.4”. As described above, the Reynolds number is obtained by a value obtained by dividing “4 × (flow product × average flow velocity / wet edge)” which is an inertial force of a flow by a “kinematic viscosity coefficient” which is a viscous force of the flow (Reynolds). Number = 4 × (flow product × average flow velocity / plumbing) / kinematic viscosity coefficient), so the Reynolds number is “Reynolds number when Froude number is 6.2” <“Reynolds number when Froude number is 12.4”. It becomes.

  Since the axis representing the viscosity in FIG. 22 is a value corresponding to the Reynolds number (the value of the Reynolds number changes small as the viscosity increases), in the pressurized container 30 of the embodiment application example, In the viscosity passing through the boundary f and the viscosity passing through the boundary g between the steady jump water and the strong water jump water, the viscosity passing through the boundary g is smaller.

Therefore, in the pressurized container 30 of the application example of the embodiment, the boundary g between the steady jumping water and the strong water jumping water does not pass at a fluid number of about 12.4, but a value corresponding to a case where the viscosity is smaller than the boundary f, for example, Like the fluid number 11, it is considered that the fluid passes at a fluid number of 11.3 or less. Then, as described above, in FIG. 2 (a), this indicates that the characteristic line a indicates that the turbidity indicates the phenomenon of strong jump water when the total area of the notches K is 63 mm ^2. Match the result.

  Similarly, the viscosity passing through the boundary e between the weak flow jump and the vibration jump is larger than the viscosity passing through the boundary f between the vibration jump and the steady jump. Therefore, the boundary e between the weak water jump and the vibration water jump does not pass at 3.4, but passes at a value corresponding to the case where the viscosity is larger than the boundary f and becomes larger than the fluid number 3.4. It is considered that the boundary d with the weak water jump does not pass at 2.3 but passes at a value corresponding to the case where the viscosity is larger than the boundary e and becomes larger than the fluid number 2.3 (boundary due to water collapse). Move). That is, in FIG. 22, the line connecting the boundaries of the jumping water classification in the pressurized container 30 is not a straight line i but a curved line i ′.

To summarize the above, for the boundary of jumping water classification in the pressurized container 30 of the application example of the embodiment,
(1): The boundary f between the vibration jump and the steady jump is passed at a fluid number of about 6.2.
(2): The boundary g between the steady jump and the strong jump is not passed at a fluid number of about 12.4. This is because the flow velocity at the intersection of the boundary f and the fluid number 6.2 is, for example, 868 mm / s, whereas the pressure vessel 30 in the application example of the embodiment at the boundary g has a considerably faster flow velocity, for example, twice. It is. That is, the boundary g between the steady jump and strong jump water in the pressurized container 30 of the application example of the embodiment is higher than the boundary f between the vibration jump and the steady jump water. The boundary g in the pressurized container 30 of the application example of the embodiment passes with a fluid number smaller than the fluid number of about 12.4 because the h reaches the water surface in a form with less collapse.
(3): The Reynolds number is obtained by a value obtained by dividing “4 × (flow product × average flow velocity / wet edge)” that is an inertial force of a flow by a “dynamic viscosity coefficient” that is a viscous force of the flow.
(4): The level of water flow h reaches the water surface in a form that does not collapse. The contact surface between the surface to be added (the tank inner wall in the pressurized container 30 in the application example of the embodiment) and the water flow It means the same as reaching the water surface without increasing so much.
(5): Since the contact surface is a wet side, in the pressurized container 30 of the application example of the embodiment, the boundary g between the steady jump and the strong jump is larger than the boundary f between the vibration jump and the steady jump. High inertial force.
(6) The inertia force “large” and the Reynolds number “large” have the same meaning, and the viscosity “small” has the same meaning.

  From the above, the jumping classification of the pressurized container 30 in the application example of the embodiment shown in FIG. 21B passes through the boundary g between the steady jumping and strong jumping water with a fluid number of 11.3 or less, for example. The line connecting the boundaries of the jumping classification is as if the boundary f between the jumping water and the steady jumping water passes at a fluid number of 6.2, and the boundary e between the wavelike jumping water and the vibration jumping water passes at a value greater than the fluid number of 3.4. It is considered that the curve is represented by an oblique curve i ′.

The downward arrow M ₁ in FIG. 21 (b) indicates the number of upstream fluids in an example where the total area of the notches K is 63 mm ² and the flow rate of water introduced into the pressurized container 30 is 6 liters / minute. When the 11.3 jet becomes normal, it means that it is on the right side of the boundary g ″, causing a strong water jump and releasing energy corresponding to a fluid number of 8.

By the way, when the water temperature rises after chasing, for example, the kinematic viscosity coefficient is 0.000001004 [20 ° C kinematic viscosity coefficient (ν: m ² / s)] to 0.000000658 [40 ° C kinematic viscosity coefficient (ν: m ² / s)] It changes as follows. Therefore, the characteristic line i ′ shown in FIG. 21 (b) becomes the viscosity “small” when the temperature rises. Therefore, when the water temperature is 20 ° C., for example, at the boundary f between the vibration jump and the steady jump. In the case of passing at a fluid number of about 6.2, if the temperature rises above 20 ° C, it will pass at a value smaller than the fluid number of about 6.2. The boundary f between the vibrational jumping and the steady jumping moves to a value larger than the fluid number of about 6.2 (boundary movement due to water temperature).

  That is, the change in the contact surface is a characteristic (change in the inertial force of the flow) unique to the apparatus determined by the size of the notch K in the pressurized container 30 and the material of the tank 31 in the application example of the embodiment. The line connecting the boundaries of the curve appears as a slanted line i ′, and changes in the water temperature, bathing agent, and the like move as characteristics of the use conditions (changes in the viscous force of the flow). Therefore, based on the three-dimensional diagram as shown in FIG. 20, when trying to show the appropriate jumping water classification in a cross section of the pressurized container 30 of the application example of the embodiment, a line connecting the boundaries of the jumping water classification is shown. 21 (b) is a curve i ′. Note that it is appropriate that the change in the viscous force of the flow is taken as the position of the three-dimensional cross section of FIG.

  This is because, in the case of rivers, connecting the number of fluids at the boundary of jumping classification that changes in stages is indicated by a straight line h, and if the classification of jumping water changes as in the case of rivers, the number of fluids at the boundary of jumping classification is connected. In this case, it should be a straight line, but in the pressurized container 30 of the example application example in which the change of the contact surface occurs and in the development example (including the second development example in which the change of the contact surface hardly occurs), Since the straight lines are shifted in accordance with changes in the inertial force of the flow and changes in the viscosity, the straight lines are respectively curved lines corresponding to the shifts. That is, the line connecting the boundaries of the jumping water classification in the pressurized container 30 of the application example of the embodiment is not the straight line i but the curved line i ′, and the curving of this straight line indicates the water collapse due to the flow velocity of the present application. Because.

By the way, in the case of a high flow velocity, the fact that reaching the water surface in a form with little collapse of the height h of the water flow affects the boundary g between the steady jump and the strong flow jump with a high flow velocity is described above. However, conversely, in the case of a slow flow velocity, the water flow height h collapses and reaches the water surface in a large form. Since the above-described influence is based on the boundary f between the vibration jump and the steady jump, the boundary g is affected. Therefore, the reference boundary f is not affected by the collapse of the height h of the water flow. It should be. However, referring to (Table 1), when the total area of the notch K is 63 mm ² , 84 mm ² , 105 mm ² , that is, 105 mm ² or less, the air layer A is formed at a flow rate of 5 liters / minute of water introduced into the pressurized container 30. The air layer A is not formed at a flow rate of 5.5 liters / minute. That is, the boundary f between the vibration jump and the steady jump exists between a flow rate of 5 liters / minute and a flow rate of 5.5 liters / minute.

However, present between the boundary f between only vibrating hydraulic jump and stationary hydraulic jump when the total area 126 mm ² notch K is the flow rate 6.5 liters / min and a flow rate 7 l / min, the portion different from the 105 mm ² or less The boundary flow rate moves. Therefore, based on (Table 1), when the Froude number is illustrated with respect to the total area of the notch K, it becomes as shown by the characteristic line a in FIG. 18, and the boundary between the vibration jump and the steady jump draws a gentle curve I understood that.

The cause of this is that when the contact surface between the tank-attached surface and the water flow shown in FIGS. 19A and 19B is slow, the tank flows while the water flow is flowing from the notch to the water surface. The contact surface of the inner wall with the surface to be added increases. In the case where the total area of the notch K is 63 mm ² , there is a distance between the notch and the total area of the notch K is 126 mm ² . In some cases, since the gap between the notches is narrow, it is considered that water collapse due to the spread of water flow in the gaps between the notches is limited.

That is, as the total area of the notch K becomes 63 mm ² → 84 mm ² → 105 mm ² → 126 mm ² , the distance between the notches is 4.35 mm → 2.39 mm → 1.21 mm → 0.43 mm, and the contact surface is The inventor of the present application speculates that this appears as a curve boundary because it cannot increase beyond the above value. That is, the influence of the further viscosity described above is that there is little restriction on water collapse (for example, the restriction is small because the distance between notches is as wide as 4.35 mm compared to 0.43 mm). Since there is a lot of room to increase, it is considered that it is more susceptible to viscosity when the water flow is slow (boundary movement due to water collapse).

  In addition, even if the shape is approximately triangular, it is difficult for water to collapse when the flow rate is high (boundary movement due to water collapse). If there is room for water collapse, water collapse will increase rapidly, and this is considered to appear as an effect of further viscosity (boundary movement due to room for water collapse).

  That is, the influence of further viscosity is, in other words, that it takes time until the water flow coming out of the partition plate reaches the surface of the water stored under the partition plate when there is room for water collapse. This is thought to be the effect of water collapse. This is a decisive difference between the water jump phenomenon and the general water jump classification in the application examples and development examples. In other words, in river jumping research, river banks are not variable, so the river cross-sectional area (water channel width) is fixed. The width becomes larger, and as a result, the influence of viscosity appears, and it is considered that a value with a large Froude number is necessary.

That is, as shown in FIG. 20, when the fluid number that is the boundary of the jumping phenomenon classification is greatly affected by the viscosity (viscosity), the fluid number is larger than when the fluid is not affected by the viscosity. In the example of the pressurized container 30, the total area of the notches K is 63 mm ² and the flow rate of water introduced into the pressurized container 30 is 5 liters / minute (the flow rate is small and the notch Since the distance between the two is large and there is room for water collapse, it is further affected by viscosity), so even if the fluid number is 9.45, vibration jumping occurs as shown in FIG.

That is, when the boundary movement due to water collapse is corrected (see the arrow Mk in FIG. 21B), the curve i in FIG. 21B becomes i ′, and when the influence of further viscosity is corrected (as indicated by the arrow Ms). Considering the boundary movement due to the room for water collapse, the curve i ″ is obtained. The intersection of the curve i ″ and the amount of energy released 3.5 (Y axis) at the jump is the steady state of the vibration jump and the steady state. intersects the boundary f "of the hydraulic jump in this intersection, the Froude number represents about 9.9. Therefore, the position shown in down arrow _{M 2} in FIG. 21 (b), in fluid number 9.45, the vibration hydraulic jump When the upstream flow rate of 9.45 is normal, the energy corresponding to the fluid number of 1.5 is released.

The calculation of the distance between notches in the case where the total area of the notches K is 63 mm ² is as follows. That is, since the inner diameter is 45 mm, the inner circumference is 141.3 mm (45 mm × π). When the total area of the notch K is 63 mm ² , the total base length is 63 mm (base 3.5 mm × 18), and therefore, the gap between the notches is 4.35 mm ((141.3 mm−63 mm). ) / 18). Further, the same is obtained in the case where the total area of the notch K is 84 mm ² , 105 mm ² , 126 mm ² .

By the way, using the boundary movement due to the water collapse due to the gap between the notches K, for example, in the pressurized container 30 of the application example of the embodiment, the configuration is as in a specific example in which the total area of the notches K is 63 mm ^2. By doing so, the white turbidity improvement efficiency by air non-formation mode can be raised as described below.

  That is, normally, during the operation of the undissolved air layer formation mode, the rotational speed of the circulation pump 21 is lowered to reduce the flow rate (low rotational speed), and when switching to the air layer non-formation mode operation, the rotational speed of the circulation pump 21 is increased. In order to increase the flow rate (during the rotation speed) but to further increase the turbidity, it is preferable to further increase the rotation speed of the circulation pump 21 (high rotation speed), and to increase the rotation speed of the circulation pump 21 in the air layer non-formation mode. If it is increased, the white turbidity when fine bubbles are generated can be improved.

  Therefore, the rotational speed of the circulation pump 21 is not controlled as low rotational speed → medium rotational speed → low rotational speed →..., But low rotational speed → high rotational speed → low pump rotational speed → high rotational speed. If the reciprocation between the low rotation speed and the high rotation speed is reciprocated like this, the white turbidity at the time of the generation of fine bubbles can be improved. The pump rotation speed switching time is increased by that amount, and the sound (sound quality) of the circulation pump 21 changes between a low rotation speed and a high rotation speed, so that the user may feel uncomfortable.

On the other hand, when the notch K is a triangle having a base of 3.5 mm and a height of 2 mm, if the distance between the notches is 4.35 mm as in the specific example in which the total area of the notches K is 63 mm ² , vibration jumping The reciprocating movement between the water and the strong water jump can be reciprocated with a difference of only 1 liter (for example, the vibration water jump that can be operated in the undissolved air layer formation mode at 5 liters / minute, for example, the air layer non-formation mode operation at 6 liters / minute. And can generate strong water jumps that can cause strong cloudiness).

That is, in the pressure vessel 30 of the embodiment application, in FIG. 21 (b), "hanging perpendicular R ₁ from the intersection of the, curve i" boundary g between the curve i 'from the intersection point between the boundary f " will indicate the number of upstream Froude said between two perpendiculars results in a steady-state hydraulic jump in the case of hanging perpendicular R _2, (shrinks perpendicular distance by the boundary moves with water collapse margin) the perpendicular distance is small. Therefore, the difference between the flow rate of water corresponding to the low rotation speed of the circulation pump 21 and the flow rate of water corresponding to the high rotation speed is only 1 liter / minute, and the low rotation speed and high rotation speed of the circulation pump 21 are Since the difference is small, the switching time can be short, and there is no change (or small) in the sound quality associated with the switching of the rotation speed of the circulation pump 21. Therefore, the user convenience can be improved.

  That is, the boundary movement due to the above-mentioned room for water collapse allows smooth and high-speed switching between the undissolved air layer formation mode operation and the air layer non-formation mode operation, particularly by the mode switching control means, and the user The effect which does not give discomfort to can be given.

Note that the boundary movement due to the water collapse space is not almost the case of the total area 126 mm ² of the notch K but the case of the total area 105 mm ² of the notch K in the specific example of the pressurized container 30 of the embodiment application example. In the case where the total area of the notch K is 63 mm ² , the movement becomes larger as described above, improving the stirring efficiency in the air layer non-forming mode and exhibiting the turbidity improving effect.

As shown by the characteristic line b in FIG. 18, when the total area of the notch K is 126 mm ² , the distance between the notches is 0.43 mm and 12% (0.43 mm ÷ 3.5 mm) of the bottom side. Can be enlarged to 112% (1.12 times)), and when the total area of the notch K is 105 mm ² , the distance between the notches is 1.21 mm and the bottom is 35% and the wet side is 135% ( 1.35 times) it is expandable up, cut when outs of the total area 63 mm ² of K is 124% notch distance is relative to the bottom (wetted perimeter 22.4% (2.24 times) expandable to Thus, the air layer non-forming mode operation in the strong water jump region and the undissolved air layer forming mode operation in the vibration water jump region can be switched at high speed and smoothly.

  Therefore, when the distance between the notches K is, for example, 35% (0.35 times) to 400% (4 times) with respect to the bottom side (the wet side can be expanded to 135% to 500%), It was found that “boundary movement due to water collapse” can be used for mode switching. As shown by characteristic lines a and b in FIG. 18, the gentle curve (characteristic line a) at the boundary between the vibration jump and the steady jump is compared with the line indicating the wettability enlargement rate (characteristic line b). Then, when the Junbei expansion efficiency is 135% or less, the boundary curve (characteristic line a) does not coincide with the Junbei enlargement rate line (characteristic line b), and when the Junbei enlargement efficiency is 135% or more, It can be seen that the boundary curve (characteristic line a) substantially coincides with the wettability enlargement rate line (characteristic line b). The distance between the notches with respect to the bottom side may be provided by shortening the opening (bottom side) of the notch K as shown in FIG.

Further, due to the influence of the above-described viscosity, for example, when the total area of the notch K is 63 mm ² and the inner diameter Φ22.5 mm of the pressure vessel 30 is set, the inner circumference is 70.7 mm (22.5 mm × π). When the total area of the notch K is 63 mm ² , the total base length is 63 mm (base 3.5 mm × 18), and the gap between the notch is 0.43 mm ((70.7 mm−63 mm) / 18), the boundary f between the vibration jumping and the steady jumping with an inner diameter of Φ45 mm is, for example, 9.9 (between 9.45 and 10.39), whereas the inner diameter is Φ22.5 mm. Then, the boundary f is the same as in the case where the total area of the inner diameter Φ45 mm notch K is 126 mm ² (the same as the number of fluids under the same condition of 0.43 mm between the notches), and the fluid number is, for example, 6. 2 is considered.

That is, when the total area of the notches K is 63 mm ^{2 and} the inner diameter of the pressurized container 30 is, for example, Φ27 mm to Φ20 mm, the distance between the notches is 1.21 mm ((27 mm × π−63 mm) / 18) to 0 mm. In this case, it is considered that the fluid number divided into a condition in which the amount of dissolved air cannot be measured and a condition in which the amount of undissolved air can be measured is, for example, 6.2.

Similarly, when the total area of the notch K is 84 mm ^{2 and} the inner diameter of the pressurized container 30 is, for example, Φ36 mm to Φ27 mm, or the total area of the notch K is 105 mm ² , the inner diameter of the pressurized container 30 is, for example, Φ45 mm to Φ33. In the case where the total area of the notch K is 126 mm ^{2 and} the inner diameter of the pressurized container 30 is, for example, Φ54 mm to Φ40 mm, similarly, the condition that the dissolved air amount cannot be measured and the condition that the undissolved air amount can be measured For example, when the shape of the cutout K is formed as in the pressurized container 30 of the application example of the embodiment, the gap between the cutout and the cutout is 1.21 mm. If it does not exceed, the number of fluids divided into a condition where the dissolved air amount cannot be measured and a condition where the undissolved air amount can be measured is 6. It is considered to be in.

When the total area of the notch K is 126 mm ² and the inner diameter of the pressure vessel 30 is Φ90 mm, the total base length when the inner circumference is 282.6 mm (90 mm × π) and the total area of the notch K is 126 mm ^2. The length is 126 mm (base 3.5 mm × 36 pieces), and the gap between the notches is 4.35 mm ((282.6 mm-126 mm) / 36 pieces), so the gap between the notches 4.35 mm. In this case, since the total area of the notches K is 63 mm ² and the inner diameter of the pressurization container 30 is Φ45 mm, the specific distance between the notches K and the specific example of the pressurization container 30 in the application example of the embodiment is the same. In this example, the boundary f between the vibration jump and the steady jump is considered to have a fluid number of, for example, 9.9 (between 9.45 and 10.39). It is done.

That is, when the cutout K was used triangular base 3.5 mm × height 2 mm, to the case of providing 18 months notches on the inner diameter of the container 30 45 mm and the total area 63 mm ^2, notches on the inner diameter of the container 30 90 mm In the case where 36 are provided and the total area is 126 mm ² , the distance from the notch is the same as 4.35 mm (the boundary movement due to the water collapse space is the same), so the undissolved air layer is formed at high speed and smoothly. The mode operation and the air layer non-formation mode operation can be switched, and 36 notches are provided in the inner diameter Φ90 mm of the container 30 so that the total area is 126 mm ² and the flow rate of water is doubled. You can make cloudy hot water.

  By the way, the bath apparatus according to the present embodiment generates hot bubbles in the water in the bathtub 26, the hot water operation function, the automatic operation function including the filling of the bathtub 26, the reheating operation function of the bathtub water, and the water in the bathtub 26. Next, the operation of this bath apparatus will be briefly described. The bath device is provided with a control device 3, which is not shown in FIG. 1, but a bath remote control device and a kitchen remote control device are signal-connected to the control device 3. In this bath apparatus, the operation of the hot water supply function is started by opening a hot water tap (not shown) provided at the hot water supply destination from the hot water supply pipe 11 with the operation switch of the bath remote control apparatus or the kitchen remote control apparatus turned on. Is done. This operation is controlled by a combustion control unit (not shown) in the control device 3 based on the incoming water temperature by the incoming water temperature sensor 6 and the amount of hot water supplied by the flow rate sensor 4. The hot water supply burner 10 is burned so that the (hot water temperature) becomes the hot water supply set temperature.

  The automatic operation function in the bath apparatus is started by turning on an automatic switch provided in at least one of the remote controller for the bath and the kitchen. The pouring electromagnetic valve 13 is opened and the hot water supply function is started. Similar to the operation, hot water heated through the hot water supply heat exchanger 7 enters the hot water supply line 14 from the hot water supply line 11, and passes through a recirculation circuit 25 having a return pipe 23 and an outgoing pipe 24. It is dropped into the bathtub 26.

  When the hot water filling is completed, the hot water solenoid valve 13 is closed, and when the detected temperature detected by the bath temperature sensor 18 is lower than the hot water filling temperature (bath setting temperature), the operation of the reheating function is performed. The operation of the reheating function is performed by driving the circulation pump 21 and circulating the water in the bathtub 26 through the recirculation circulation path 25, and the detected temperature detected by the bath temperature sensor 18 becomes the bath set temperature. The reheating burner 16 is combusted so that the reheating heat exchanger 15 is heated. In the operation of the automatic operation, the operation of the heat retaining function is continuously performed so that the temperature of the bath water does not become lower than the allowable temperature of the bath over the allowable range for a preset time. The function of the chasing single operation is to perform the chasing function operation when a chasing switch provided in the bath remote control device is normally pressed.

  Further, the control device 3 has a fine bubble generation control configuration shown in FIG. 2 (a), which includes a mode switching control means 40, a pump drive control means 41, an air introduction valve. Opening / closing control means 42 and combustion control means 77 are provided. These control means 40, 41, 42, 77 are signal-connected to the fine bubble generation operation unit 43 provided in the bath remote control device 1, and signals are sent to the chasing operation command operation unit 44 via the fine bubble generation operation unit 43. It is connected.

  The fine bubble generation operation unit 43 is an operation unit that turns on and off the fine bubble ejection operation of the bath apparatus. The fine bubble generation operation unit 43 is provided as a bubble generation switch, for example, in the bath remote controller 1, and can perform an on / off operation of the fine bubble discharge operation in accordance with the on / off of the switch. Further, the switch is automatically turned off when a predetermined set time has elapsed since the switch was turned on. The switch on / off signal is applied to the mode switching control means 40, the pump drive control means 41, and the air introduction valve opening / closing control means 42. Thus, by providing the micro-bubble generating operation unit 43 in the bath remote controller 1, the micro-bubble generating operation unit 43 can be easily turned on and off by the operation of the micro-bubble generating operation unit 43. Bathing time can be realized.

  The chasing operation command operation unit 44 is an operation unit that turns on the chasing operation of the bath apparatus. The rebirth operation command operation unit 44 is provided as the rebirth switch in the bath remote controller 1. When this switch is turned on, the rebirth command is transmitted to the fine bubble generation operation unit 43, and the fine bubble generation operation unit 43. To the pump drive control means 41 and the air introduction valve opening / closing control means 42. When an operation for turning on a fine bubble is applied from the fine bubble generating operation unit 43 during the operation of the chasing function (or when an operation for turning on the chasing function from the heat retaining function is performed during the fine bubble ejecting operation, for example) , While giving priority to the fine bubble ejection operation (such as air introduction valve opening / closing control, pump drive control, etc.), the combustion control means 77 drives the burner 16 until the detected temperature detected by the bath temperature sensor 18 reaches the bath set temperature. And the reheating heat exchanger 15 is heated.

  If an operation for turning off the fine bubble ejection operation is performed during the operation of the reheating function and the fine bubble ejection operation at the same time, the combustion of the reheating burner 16 is stopped once and the circulation pump 21 is turned off once. Alternatively, the flow rate is reduced to a value that decreases to near zero, and a flow rate corresponding on-off valve 48 (described later) is opened (below the switching pressure), and then the operation of the reheating function is resumed. If the operation of turning off the reheating function is performed while the reheating operation and the fine bubble ejection operation are being performed simultaneously, the combustion of the reheating burner 16 is stopped.

  In the case where the reheating operation and the fine bubble ejection operation are performed simultaneously, hot water is reheated and heated in the heat exchanger 15. However, when the liquid in which a large amount of air is dissolved is heated, the solubility is increased. In particular, the nitrogen in the melted air regenerates and re-forms air bubbles in the piping after the heat exchanger 15, which causes rust (gas-liquid two-phase flow accelerated corrosion) and cracks (gas-liquid two-phase). May cause hydrodynamic vibration stress corrosion cracking).

  In the present embodiment, when the fine bubble jetting device 39 jets into the bathtub 26, the pressure is reduced to generate fine bubbles in the bathtub 26. That is, the pressure between the circulation pump 21 and the fine bubble jetting device 39 is high. A reheating heat exchanger 15 made of copper is provided in the part, and rust (gas-liquid two-phase flow accelerated corrosion) and cracks (fluid elastic vibration stress corrosion due to gas-liquid two-phase flow) in the reheating heat exchanger 15 In the case of heating a liquid in which a large amount of air is dissolved and the cause of cracking), re-formation of bubbles is performed by controlling the flow rate corresponding on-off valve 48 by the pump drive control means 41 as described later. Is preventing. Therefore, when heating a liquid in which a large amount of air is not dissolved (normal replenishment), the pump drive control means 41 as described later is controlled so as to open the stress corresponding on-off valve 48, and the efficiency is improved. Speeding up the general pursuit.

  The pump drive control means 41 increases the rotational speed of the circulation pump 21 during the fine bubble ejection operation so that the flow rate of the hot water introduced into the fine bubble ejection device 39 is equal to or higher than a predetermined flow rate, and during the reheating operation, the circulation pump. The rotational speed of 21 is made low, and the flow rate of the hot water introduced into the fine bubble ejection device 39 is made less than the set flow rate. In the present embodiment, the flow rate corresponding on / off valve 48 of the fine bubble generating device 39 is opened and closed as described above by the flow rate control by the rotation control of the circulation pump 21 by the pump drive control means 41, and the fine bubble generating operation and reheating operation are performed as described above. And the function of these simultaneous operations is enabled.

  Thus, when the reheating operation and the fine bubble ejection operation are performed at the same time, water is reheated and heated in the heat exchanger 15, but when a liquid in which a large amount of air is dissolved is heated, Since the solubility is lowered, nitrogen in the dissolved air is replenished, and bubbles are re-formed in the pipes after the heat exchanger 15, which are rusted (gas-liquid two-phase flow accelerated corrosion) and cracked (gas-liquid May cause hydroelastic vibration stress corrosion cracking due to two-phase flow). In the bath apparatus of the present embodiment, the pressure is reduced when the fine bubble jetting device 39 jets into the bathtub 26 to generate fine bubbles in the bathtub 26, that is, between the circulation pump 21 and the fine bubble jetting device 39. A reheating heat exchanger 15 made of copper is provided in the portion where the pressure increases, and a liquid in which a large amount of air that causes rust (gas-liquid two-phase flow accelerated corrosion) is dissolved in the reheating heat exchanger 15 When heating is performed, the re-formation of bubbles is prevented by performing control by the pump drive control means 41 as described later so as to close the flow rate corresponding on-off valve 48. Therefore, when heating a liquid in which a large amount of air is not dissolved (normal replenishment), the pump drive control means 41 as described later is controlled so as to open the flow rate corresponding on-off valve 48, and the efficiency is improved. Speeding up the general pursuit.

  By the way, when the present inventor clarifies the flow structure causing rust (gas-liquid two-phase flow accelerated corrosion) and takes structural measures, a liquid (for example, solubility) in which a large amount of air causing rust is dissolved. It was also found that at 100%, a liquid that cannot prevent the re-formation of bubbles even if the reheating heat exchanger 15 is provided in the portion where the pressure becomes high can be heated.

  For example, when bath water at 40 ° C. is sucked and heated by using the reheating heat exchanger 15 at Output 8000 Kcal / h (efficiency 80% at a combustion amount of 10000 Kcal / h), for example, the air layer is 6 liters / minute. When a liquid in which a larger amount of air is dissolved in the formation mode operation (vibrating water jump) (for example, solubility 100%) is sent to the reheating heat exchanger 15, for example, an undissolved air layer formation mode operation is performed, for example, at 5 liters / minute. Is switched, the liquid in which a larger amount of air is dissolved is repelled and decelerated in the heat exchanger 15, and the temperature increase width becomes larger than before the deceleration, and the temperature rises by about 27 ° C. (deg). The Henry's constant for the water of the air at this time is 8.70 (40 ° C) → 10.37 (67 ° C) (Exhibition: Chemical Engineering Handbook, Chemical Engineering Society, Maruzen). Bubbles are reformed (for example, equivalent to 56 ml / min in terms of 1 atm).

  Further, when the flow rate is reduced to switch from the air layer non-formation mode operation to the undissolved air layer formation mode operation, the number of rotations of the circulation pump 21 is reduced, which means that the pressure in the reheating heat exchanger 15 is lowered. Therefore, if this pressure drop is large, the re-created air volume becomes large according to Boyle's law, which causes the flow velocity causing rust to increase.

  On the other hand, if the difference between the low rotation speed and the high rotation speed of the circulation pump 21 is reduced, the switching time is shortened, so that it is possible to prevent the flow velocity acceleration that causes rust from being increased. That is, if the difference between the low rotation speed and the high rotation speed of the circulation pump 21 is reduced, the pressure in the reheating heat exchanger 15 is kept high to prevent generation of bubbles, and even if bubbles are generated, the bubble volume is increased. By preventing the increase as much as possible, gas-liquid two-phase flow flow accelerated corrosion can be prevented, or even if it cannot be completely prevented, it can be maintained at a level where there is no problem in practical use. If the difference between the low rotation speed and the high rotation speed of the circulation pump 21 is reduced, the change in the sound quality associated with the change of the rotation speed of the circulation pump 21 can be eliminated (or small).

  The reheating heat exchanger 15 used in the present embodiment is a plurality of copper straight water pipes (see FIG. 1) that pass through a plurality of copper fin plates that receive gas combustion heat, and boil in the water pipe. In order to prevent this, a coil containing a turbulent water flow is included, and a general shape connected by a plurality of U-shaped water pipes called copper U-bends is used. The inventor of the present application has also found that rust is mainly generated by a U-bend, and the location of the rust is different depending on the situation.

  That is, rust is generated in the outer region and the inner region of the U bend 150 as indicated by F and G in FIG. Rust generated in the outer region of the U-bend 150 is generated when undissolved air flows into the reheating heat exchanger 15 without providing the pressure vessel 30 on the downstream side of the circulation pump 21. It occurs on the outer peripheral side of the U-bend 150 (back side of the bent portion, outside of the curved pipe) as shown by F in FIG. This position corresponds to a region where a water flow straight from the entrance side of the U-bend 150 collides (in the same figure, it occurs at a portion slightly shifted to the right side of the figure depending on the flow direction).

  The inventor of the present application explained that the cause of the rust on the outer peripheral side of the U bend 150 is that the water flow goes straight through the gas slug that is approaching the U bend 150 and passes through the gas slug. I think it is because it collides with the wall. In other words, the gas-liquid two-phase flow in the pipe is not uniform, there are parts with a lot of liquid, and there are parts with a lot of gas, such as parts with gas slug, and there are bubbles in the water where there are many liquid parts. However, it is thought that this is the situation where bubbles move up and down in carbonated water poured into a cup in everyday life, but it feels like there is liquid in the air in areas where there is a lot of gas (rain is raining in everyday life) This is the situation).

  And when the gas Slug reaches the U bend 150, the direction changes (corresponding to the situation where the wind is blowing laterally on the ground surface), but the liquid part goes straight by the law of inertia and hits the U bend 150 directly. The direct hit of water droplets is thought to be the cause of rust. This situation is easy to understand if the raindrops go straight and hit the ground even though the wind is blowing laterally on the ground surface. Therefore, the pressurized container 30 is provided on the downstream side of the circulation pump 21 to prevent the undissolved air from flowing out, and is additionally dissolved in water so that the air is more sufficiently absorbed into the water (for example, solubility 100). % But without bubbles), if this water is replenished and introduced into the heat exchanger 15, rusting on the outer peripheral side (F part) of the U bend 150 can be prevented.

On the other hand, the rust on the inner peripheral side of the U-bend 150 (150a) (the bent side of the bent portion, the inner side of the bent tube) as indicated by G in FIG. It is rust (this part is damaged and thins), and the cause of this rust is that when the water flow turbulent in the straight water pipe bends the U bend 150a, a vortex is generated inside (FIG. 44). (See B in (a)), and it is presumed that the flow velocity is increased only in the turbulent portion. Further, for example, after the pressure vessel 30 as in the application example of the embodiment is provided on the downstream side of the circulation pump 21 and the pressure vessel 30 is pressurized and melted into water of water, water is introduced into the U bend 150. Accordingly, even in the U bend 150a as shown in FIG. 44 (a), no rust on the outer peripheral side is generated, so the rust on the inner peripheral side of the U bend 150 (see G in FIG. 44 (a)). Gas-liquid two-phase flow that generates 100% of liquid slug without gas slug
It is estimated that it is Flow.

  Note that the U bend 150a shown in FIG. 44 (a) has a pipe wall thickness of 0.6 mm and an inner diameter of 12.7 mm. In FIG. 44, the radius of the innermost solid line is 8.65 mm, 2 from the inside. The radius of the third solid line is 9.25 mm, the radius of the third solid line from the inside is 20.75 mm, the radius of the outermost solid line is 21.35 mm, and the U-bend 150a of this dimension has a tube diameter of Φ12.7 mm, for example. The pipe (pipe) having a wall thickness t = 0.6 mm is formed by bending so that the bending radius at the center of the pipe is 15 mm.

  As described above, the present inventor believes that it is impossible to prevent rusting in the inner region of the U bend 150 unless the configuration of the U bend 150 is appropriately set to prevent generation of vortices due to bubble re-formation. Based on the above estimation, as a measure for preventing rust on the outer peripheral side of the U-bend 150 as shown in F of FIG. 44 (a), a pressure vessel 30 is provided upstream of the reheating heat exchanger 15, and reheating is performed. In addition to preventing undissolved air from flowing into the heat exchanger 15, as a measure for preventing rust on the inner peripheral side of the U bend 150 as indicated by G in FIG. The bending radius (R) was increased, and a shape that could not be swirled in the piping or a shape that caused little damage even if swirled could be specified.

In detail, the bubble by the in the copper pipe in the range of pressures from about 1~10kg heavy / cm ² (e.g. pressure 10kg weight / 1 kg of liquid was bubbles dissolved in cm ² in solubility of 100% heavy / cm ² If the re-formed gas-liquid two-phase flow) and WLO = 1605 mm / sec or less (pipe diameter Φ12.7 mm, wall thickness t = 0.6 mm, the liquid flow rate with a solubility of 100% is equivalent to 10 liters / min) It was found that the occurrence of rust can be prevented. For this purpose, as shown in FIG. 44 (b), it has been found that the radius (R) of the inner peripheral side surface of the damaged U-bend 150 should be 14.25 mm or more (G in FIG. 44 (b)). Rust does not occur in the area shown in

  The U-bend 150b shown in the figure has a pipe thickness of 0.6 mm and an inner diameter of 12.7 mm. In the figure, the radius of the innermost solid line is 13.65 mm and the second solid line from the inner side. Has a radius of 14.25 mm, the radius of the third solid line from the inside is 25.75 mm, and the radius of the outermost solid line is 26.35 mm. The U-bend 150b having this dimension can be formed by, for example, bending a pipe (pipe) having a pipe diameter of Φ12.7 mm and a wall thickness of t = 0.6 mm so that the bending radius at the center of the pipe is 20 mm. With the above bending radius, the radius (R) of the inner peripheral side surface of the U bend 150 can be made 14.25 mm or more.

As described above, the radius R of the inner peripheral side surface of the copper U-bend 150 in the actual use range (pressure approximately 1 to 10 kgf / cm ² · flow velocity WLO = 1605 mm / sec or less · water temperature 67 ° C after the temperature rises) If it is 14.25 mm or more, even if the pipe diameter is the same as that of the example shown in FIG. 44 (a), the same flow rate and the same flow velocity, as shown in FIG. (150b) can flow smoothly, and rust can be prevented from occurring on the inner peripheral side of the U-bend 150 as indicated by G in FIG. That is, in the U-bend 150a shown in FIG. 44 (a) and the U-bend 150b shown in FIG. 44 (b), the water flow flowing in the pipe flows in a similar arc, but FIG. In the U-bend 150a shown in FIG. 5, the U-bend 150a collides with the tube wall of the U-bend 150a in the vicinity of the intersection J between the arc having a radius of 20 mm and the arc having a radius of 20.75 mm, and the direction must be changed. The facing side of this turning point is the center of the rust generating portion on the inside of the pipe line indicated by G.

  The Henry's constant for water of air is 10.7 at a water temperature of 67 ° C. and 10.7 at a water temperature of 100 ° C., which is almost the same value. In (150b), since it has been confirmed by the present inventor that rust can be prevented at a water temperature of 67 ° C., it is considered that the occurrence of rust can be prevented even when the water temperature is 100 ° C.

  In other words, conventionally, since the elbow portion is turbulent, the gas-liquid two-phase flow accelerated corrosion countermeasure has been considered to have only a countermeasure to lower the flow velocity or remove bubbles, As one of the countermeasures for gas-liquid two-phase flow accelerated corrosion, as described above, a countermeasure for increasing the R on the inner peripheral side surface of the pipe (pipe) was found and identified as a shape that can withstand actual use.

  Furthermore, in the case of cracking (hydroelastic vibration stress corrosion cracking due to gas-liquid two-phase flow), only the water in which air is dissolved is derived from the water outlet of the pressurized container 30 and the undissolved air is If it is set as the structure which does not derive | lead-out, the penetration | invasion in the exit side pipe line and the fine bubble ejection apparatus which become the cause of a crack can be prevented. However, if a heat exchanger 15 is installed in the outlet pipe line, bubbles may be re-formed by heating, but if the pipe is fixed at a level that can pass the vibration test conducted by the Japan Gas Inspection Association. It is also understood that the piping after the reheating heat exchanger 15 (including the piping in the reheating heat exchanger) does not vibrate abnormally, and even if the piping vibrates somewhat, it can be suppressed with vibrations that do not cause cracking. It was.

  Therefore, when heating a liquid in which a large amount of air is dissolved, which causes rust (gas-liquid two-phase flow accelerated corrosion), in the reheating heat exchanger 15, a flow-corresponding on-off valve 48 is provided. In addition to performing control by the pump drive control means 41 as will be described later, rusting on the outer peripheral side of the U bend 150 and rusting on the inner peripheral side of the U bend 150 as described above are prevented. Measures should be taken to prevent rusting (or to withstand actual use even if rusting occurs) even if bubbles re-form. Furthermore, it is possible to check whether the pipe is fixed by a vibration test, or to combine measures to keep the pressure in the reheating heat exchanger 15 high by reducing the difference between the low rotation speed and the high rotation speed of the circulation pump 21. Also good.

  The mode switching control means 40 drives the circulation pump 21 at a rotational speed equal to or higher than a preset rotational speed, and vigorously agitates the water in the tank 31 so that an air layer is not formed in the tank 31 of the pressurized container 30. The function of the air layer non-forming mode to be performed and the undissolved air layer forming mode of forming the undissolved air layer in the tank 31 of the pressurized container 30 by driving the circulation pump 21 at a rotational speed smaller than the set rotational speed. The function is switched and controlled by controlling the rotational speed of the circulation pump 21. That is, the mode switching control means 40 causes the pump drive control means 41 to set the rotation speed for driving the circulation pump 21 to a set rotation speed for the air layer non-forming mode that is equal to or higher than the set rotation speed, and the air layer non-rotation mode. A command is given to alternately switch to a setting rotational speed for forming an undissolved air layer that is smaller than the setting rotational speed for forming mode, and the rotational speed switching control of the circulation pump 21 is performed by the pump drive control means 41 to switch the mode. Do.

In the pressurized container 30 of the embodiment application example and the pressurized container 30 of the first development example and the third development example, the fluid number is equal to or less than the boundary fluid number corresponding to 6.2 (usually as shown in the second development example) The formation operation of the air layer A that occurs only when the fluid number is around 4.5) is an operation during the operation of the function of the undissolved air layer formation mode. In contrast, the number of Froude boundary effect of further viscosity when the Froude number of 6.2 equivalent greater than the number of boundary Froude (total area of the cutout K 63mm ^2, 84mm ² is greater than about 6.2 (When the influence is corrected, the value is larger than the fluid number 6.2) In the pressurized container 30, the air layer A is not formed and the undissolved air layer is formed when the air layer non-forming mode function is operated. The air that formed the air layer A during the operation of the mode function is finely crushed by the momentum of stirring (by the bath water introduced vigorously at a high pressure) and dissolved in the bath water in the tank 31.

  Normally, when the transition from the vibrational jumping to the steady jumping occurring near the fluid number 4.5 is the case of the pressurized container 30 of the embodiment application example having a low Reynolds number as described above, the inertial force The influence (viscosity) of the viscosity to prevent the increase is increased, the fluid number at which steady jump occurs is increased, and for example, it is considered that the steady jump occurs in a region larger than the fluid number equivalent to 6.2. As described above, in the pressurized container 30 having a fluid number larger than 6.2, when the function of the air layer non-forming mode is operated, the air is not crushed and the air is finely crushed by the agitation and the tank 31 is formed. It is dissolved in the bathtub water inside.

At this time, if air is sent from the circulation pump 21 together with the bath water, the air is also dissolved in the bath water in the tank 31 . However, even if the dissolution of air is promoted during the operation of the function of the air layer non-forming mode, the air is not completely dissolved (the air layer A is formed during the operation of the function of the undissolved air layer forming mode). As described above, the amount of air sent from the circulation pump 21 to the pressurized container 30 is adjusted), so that the undissolved air is the air layer during the operation of the function of the undissolved air layer formation mode as described above. A is formed.

  Next, an undissolved air layer formation mode operation and an air layer non-formation mode operation are performed based on the flow rate at which the undissolved air amount can be measured (in the case of the pressurized container 30, the boundary between the vibration jump and the steady jump). An example will be described. The bath apparatus of the present embodiment measures the amount of air while performing air dissolution in the undissolved air layer formation mode (air dissolution by vibration jumping water), interweaving the air layer non-formation mode, in the air layer non-formation mode Compared to air dissolution in the undissolved air layer formation mode, the air dissolution is significantly higher. In other words, in the undissolved air layer formation mode, the water jump on the air layer formation side of the classification of the water jump corresponding to the boundary between the air layer non-formation and the air layer formation corresponding to the pressurized container 30 such as air dissolution by vibration jumping ( In the air layer non-formation mode, the air layer is not formed and the air layer is formed corresponding to the pressurized container 30 such as air dissolution by steady jumping in the air layer non-formation mode. Dissolving air in the undissolved air layer formation mode by performing air dissolution by jumping water on the air layer non-formation side (jumping water with higher fluid number than the boundary fluid number) in the classification of jumping water corresponding to the boundary of Compared to, it is much higher air dissolution.

  Note that the filter 54 is cleaned when the construction work uses thick pipes and the distance is too short, resulting in an unexpectedly large flow rate or when the filter 54 is clogged up to just before. If the pipe resistance suddenly decreases and the flow rate is unexpectedly high, the circulation pump further turns into the non-dissolved air layer formation mode when it enters the non-dissolved air layer formation mode. The amount of air may be measured by performing control such as lowering the number of rotations 21 to create an undissolved air layer formation mode.

  FIG. 3 shows an example of the rotational speed control of the circulation pump 21 associated with the mode switching. The rotational speed of the circulation pump 21 is Hi when the function of the air layer non-forming mode is operated, and the undissolved air layer is formed. The rotation speed of the circulation pump 21 during operation of the mode function is indicated by Lo. In this example, the pump drive control means 41 performs the function operation in the undissolved air layer formation mode for 6 seconds, then performs the function operation in the air layer non-formation mode for 30 seconds, and repeats this switching operation. ing. When the function of the undissolved air layer formation mode is operated, the water level detection operation in the pressurized container 30 by the electrodes 35 and 36 is performed.

  The pump drive control means 41 performs the rotational speed switching control of the circulation pump 21 in accordance with the command from the mode switching control means 40 as described above during the fine bubble ejection operation. Once the fine bubble ejection device 39 ejects the fine bubbles, the flow rate corresponding on-off valve 48 of the fine bubble ejection device 39 shown in FIG. 9 continues to close (see FIG. 10B). Although details of the flow rate corresponding on / off valve 48 will be described later, when the flow rate corresponding on / off valve 48 is in a closed state, fine bubbles are ejected from the fine bubble ejecting device 39, and therefore the flow rate corresponding on / off valve 48 is closed. If the valve is kept on, the fine bubble ejection state remains as long as the flow rate does not become zero once (the pressure of the circulation pump 21 remains high).

  The set rotation speed for forming the air layer (pump rotation speed Lo (2000 rpm)) is smaller than the set rotation speed for the air layer non-forming mode (pump rotation speed Hi (3500 rpm)), and during the chasing operation. There is no problem even if the rotational speed is less than the flow rate. In other words, the pump drive control means 41 once sets the rotational speed of the circulation pump 21 to the set rotational speed for air layer formation (3500 rpm) after setting the rotational speed for the air layer non-forming mode (3500 rpm) at the time of the fine bubble ejection operation. 2000 rpm), or the pressure of the circulation pump 21 may be increased as the set rotation speed for the air layer non-forming mode (3500 rpm), either of which is water introduced into the fine bubble ejection device 39 The fine bubbles are ejected from the fine bubble ejection device 39 by setting the flow rate of the gas to a predetermined flow rate or higher.

  On the other hand, when the fine bubble ejection is not operating, that is, when the flow-response opening / closing valve 48 is in the open state, the rotation speed of the circulation pump 21 is set to the rotation speed at which the flow-response opening / closing valve 48 is not closed (in this embodiment, The pressure of the circulation pump 21 is lowered as the rotation speed Lo (1700 rpm) which is substantially the same as the set rotation speed for air layer formation (2000 rpm), and the flow rate of water introduced into the fine bubble ejection device 39 is less than the set flow rate. By doing so, the fine bubble ejection from the fine bubble ejection device 39 is not performed.

  In addition, during the fine bubble ejection operation, that is, during the reflow operation with the flow rate corresponding on-off valve 48 closed, the reburn burner 16 is burned only at the set rotation speed for the air layer non-forming mode (3500 rpm), Reheating is performed while ejecting fine bubbles from the fine bubble ejecting device 39 with a flow rate equal to or higher than a predetermined set flow rate, and combustion of the reheating burner 16 is stopped at the set rotation speed for air layer formation (2000 rpm). Is preferred. This is because, in this embodiment, the air layer forming set rotational speed is 2000 rpm, and when the flow rate corresponding on-off valve 48 performs the reheating operation in the open state, the rotational speed of the circulation pump 21 is 1700 rpm. Since the rotation speed is almost the same (precisely, the set rotation speed for forming the air layer is higher by about 300 rpm) and the flow rate corresponding on-off valve 48 is closed, the flow rate circulating in the recirculation circuit 25 This is because there is less.

  At this time, the combustion lamp corresponding to the reheating of the remote control device is kept in the lighting state as if the combustion of the reheating burner 16 is not stopped, blown off to the user, and is not intended due to a failure or the like. I try not to imagine burning stop. Then, when the set rotational speed for the air layer non-forming mode (3500 rpm) is reached again, the combustion of the reheating burner 16 is restarted, and the water pressure is set to a predetermined pressure or higher so that the fine bubbles are ejected from the fine bubble ejection device 39. While chasing.

  In the present embodiment, the combustion of the reheating burner 16 is stopped when the flow rate corresponding on-off valve 48 is in the closed state (at the time of fine bubble ejection operation) at the set rotation speed for air layer formation (2000 rpm). In the undissolved air layer formation mode, when the rotational speed of the circulation pump 21 is increased by 300 rpm from the rotational speed 1700 rpm of the circulation pump 21 in the reheating operation when the flow rate corresponding on-off valve 48 is opened (at the time of fine bubble non-ejection operation) Pressure increases. Therefore, when the rotational speed of the circulation pump 21 is 2000 rpm, the solubility of air (particularly nitrogen) is higher when heating a liquid in which a large amount of air is dissolved than when the rotational speed of the circulation pump 21 is 1700 rpm. The present inventor has confirmed that bubble re-formation that tends to occur can be prevented, and when the number of rotations is increased by 300 rpm, the flow rate also increases, and the bath discharge temperature rise is not a problem even if there is a bather. It has also confirmed that it is in the range.

  Accordingly, the burner 16 burns even in the undissolved air layer formation mode (when operating at the set rotation speed for air layer formation (2000 rpm)) when the flow rate corresponding on-off valve 48 is closed (during the fine bubble ejection operation). The combustion of the reheating burner 16 may be continued without stopping the operation. When the combustion of the reheating burner is continued even in the undissolved air layer formation mode, the flow rate corresponding on-off valve 48 is used to compensate for the fact that the flow rate corresponding to the flow rate on-off valve 48 is closed due to the closed state. It is preferable to increase the number of revolutions as compared with the revolving operation when the valve 48 is in the open state (for example, as described above, the revolving speed for forming the air layer is set to the revolving operation when the flow rate corresponding on-off valve 48 is in the open state. May be higher by 300 rpm, but higher than that is preferable).

  The bath device and the bathtub 26 are connected by the forward pipe 24 and the return pipe 23, but the distance between the bath device and the bathtub 26 varies depending on the installation site. For example, as indicated by the shortest pipe distance, usually the longest in (Table 10), the normal pipe distance is, for example, about 10 m. In some cases, the bath apparatus is installed at a distance of 20 m from the bathtub 26 (the longest piping distance).

  And when the motor load fluctuation | variation of the circulation pump 21 arises by the difference in this piping distance, even if the rotation speed of the circulation pump 21 does not fluctuate, the flow volume of the bathtub water sent to the pressurized container 30 will differ. Then, since the fluid number becomes different due to the difference in flow rate, in the bath apparatus to which the pressurized container 30 is applied, the circulation pump 21 uses a motor having a slightly higher capacity, and the rotation speed control is performed. Do not use it, and use the motor load fluctuation due to the difference in piping distance. For example, if the flow rate decreases and the load decreases, the rotation speed increases (flow rate increases), or the rotation speed is set to the specified rotation speed. If it is confirmed that even if the circulating pump 21 is moved, the desired fluid number is within the range, it may be controlled at the predetermined number of revolutions. In the case of the present embodiment, the rotational speed control is performed after the confirmation. As a result, regardless of the piping distance (flow resistance), the fluid number is not greatly changed by maintaining the flow rate to the pressurized container 30 to be 6.5 liters ± 0.5 liter. ing.

  Further, for example, a DC brushless motor or the like may be used as a motor applied to the circulation pump 21 so that the rotation speed can be maintained, and the rotation speed may not be changed even if the motor load varies due to a difference in piping distance. However, since the change in the discharge capacity due to the load fluctuation can be made larger than in the above case, the discharge capacity is set to 6.5 ± 0 which is the set flow rate by monitoring the current and the like so that the rotation speed can be varied according to the load fluctuation. It is desirable that the structure be maintained at 5 liters / minute or less. It should be noted that even under conditions where the flow rate is low (when the piping distance is long, for example, when the flow rate is 6 liters / minute, the flow rate is low), or even when the flow rate is high, the pressure vessel 30 is connected from the inlet 32. When water containing air is poured, the air layer A is gradually increased (the water level is lowered).

  Although the circulation flow rate is affected by the piping distance, the influence is not limited to this, but extends to the amount of air sucked by the negative pressure generated by the circulation pump 21. The amount of air sucked in, for example, has a bathtub on the second floor, and when the water pressure (plus pressure) of the bathtub water is applied to the air introduction valve 38, the negative pressure created by the circulation pump 21 may be reduced. In the present embodiment, the air layer in the pressurized container 30 is increased when the electromagnetic valve 65 of the air introduction valve 38 is turned on even under such installation conditions that are unlikely to cause negative pressure. In addition, the position of the water surface in the pressurized container 30 is monitored using the electrodes 35 and 36, and the electromagnetic valve 65 is turned on and off so that the air layer A having the optimum amount of air can always be in the pressurized container 30. I have to.

  However, for example, in the case of a bath apparatus installed adjacent to a bathtub, or a 24-hour bath, a device with a fine bubble generating function in which the apparatus is miniaturized by performing bath reheating with a heating wire or the like is used. In the case where the pipe distance or the height difference from the bathtub 26 is specified, such as when installed on the water, a water level detection means for judging the size of the volume of the air layer in the pressurized container 30 may be applied. Further, in the present invention, the water level detecting means may be omitted so that the piping distance and the height difference with the bathtub can be controlled and set with a dip switch or the like.

  Moreover, in the bath apparatus of the present embodiment, air is introduced into the pressurized container 30 using the negative pressure of the circulation pump 21, but without using the negative pressure of the circulation pump 21, for example, A system configuration as shown in FIG. 39 is formed, an air pump 121 is combined with the air introduction valve 38, air is sent from the discharge side of the circulation pump 21, and the air is pressurized by a water flow driven by the circulation pump 21. It is good also as a structure sent to 30. In such a configuration, the water level detection means may be omitted even when the amount of air fed in can be controlled.

  Moreover, although the structure of the fine bubble ejection apparatus 39 is not specifically limited, For example, it can be set as the structure shown to Fig.9 (a) and FIG.9 (b). In this example, the fine bubble ejection device 39 includes a main body portion 49 and a cover member 50, and the cover member 50 is provided with a filter 54 provided with a large number of small circular through holes having a diameter of 0.8 mm. . Further, the main body 49 is provided with a pipe connection port 55 connected to the outgoing pipe 24 and the return pipe 23 of the recirculation circulation path 25 and a discharge port 56 to the bathtub 26 side. Are provided with a flow path 46 for generating fine bubbles and a flow path 47 for reheating. Further, the flow rate corresponding on-off valve 48 is provided between the fine bubble generating channel 46 and the reheating channel 47. This flow rate corresponding on-off valve 48 makes the valve body movable by a spring, generates a predetermined pressure upstream of the valve according to the flow rate hitting the valve body, and closes the flow when the valve body reaches the valve seat above the set flow rate. As a result, the upstream pressure of the valve suddenly rises, and this sudden rise in pressure ensures more closure.

  When the circulation pump 21 is driven, the bath water is sucked into the main body 49 of the fine bubble ejection device 39 through the filter 54 and guided to the return pipe 23 of the recirculation circuit 25. On the other hand, the water introduced into the main body 49 from the outgoing tube 24 side passes through at least one of the fine bubble generating flow channel 46 and the reheating flow channel 47 and is discharged from the discharge port 56. The fine bubble generating flow path 46 ejects the bathtub water circulated through the recirculation circulation path 25 into the bathtub 26 through the nozzle 45 as shown by the arrow in FIG. 9B. Fine bubbles are generated inside. The reheating channel 47 guides the bathtub water into the bathtub 26 without passing through the nozzle 45 as shown by the arrow in FIG.

  The flow rate corresponding on-off valve 48 is a valve having a structure in which the water pressure rises upstream of the on-off valve 48 in accordance with the flow rate of the water introduced into the fine bubble jetting device 39. The valve is closed at the above time, and once the valve is closed, the water is led out only to the narrow bubble generating channel 46 having a narrow channel, so that the pressure rapidly increases. The valve is opened when the flow rate is reduced to be equal to or lower than the valve opening set pressure, and is operated as follows by controlling the number of rotations (pressure) of the circulation pump 21 by the pump drive control means 41. In accordance with the operation 48, water is led into the bathtub 26 through at least one of the fine bubble generating channel 46 and the reheating channel 47 as described above.

  In other words, at the time of the chasing operation, the circulating water amount of the circulation pump 21 is reduced or stopped so as to temporarily reach the stop position by the control (rotation speed and applied voltage control) of the circulation pump 21 by the pump drive control means 41. However, when the pressure generated by the flow rate of the water introduced into the fine bubble ejection device 39 is equal to or lower than the valve opening set pressure, the flow rate corresponding on-off valve 48 is spring-loaded as shown in FIGS. 9 (a) and 10 (a). It is urged by 53 to open. After the valve is opened, by increasing the rotational speed of the circulation pump 21 (or resuming energization) and setting it to the revolving speed (or voltage), the water flows as shown in the solid line arrow 47. The water is led into the bathtub 26 and a normal bath water reheating operation is performed. In this reheating operation, water passes through the reheating channel 47, and the fine bubble generation channel 46 is very narrow compared to the reheating channel 47. When not closed, it preferentially passes through the reheating channel 47 (the flow rate of water passing through the fine bubble generating channel 46 is small). Therefore, fine bubbles are not generated during the chasing operation.

  On the other hand, during the fine bubble ejection operation, the flow rate of water introduced into the fine bubble ejection device 39 is set to be equal to or higher than the valve closing pressure by the control (rotation speed and applied voltage control) of the circulation pump 21 by the pump drive control means 41. By doing so, as shown in FIGS. 9B and 10B, the flow rate corresponding on-off valve 48 is pushed against the urging force of the spring 53 by water pressure and closed. As a result, the water is jetted into the bathtub 26 through the fine bubble generating flow path 46 as shown by the broken line arrow, whereby the fine bubbles are jetted into the bathtub 26 to cause white turbidity. .

  In this manner, by forming the fine bubble ejection device 39 by applying the flow rate corresponding on-off valve 48, the configuration of the electrical wiring or the like is provided in the fine bubble ejection device 39 only by controlling the rotational speed of the circulation pump 21. Without the provision, the flow path in the fine bubble ejection device 39 can be switched between the chasing operation and the fine bubble generating operation, and the device configuration and control configuration can be simplified.

  Further, the flow rate corresponding on-off valve 48 has the switching characteristics shown in FIG. 11, and when the flow rate of water introduced into the fine bubble ejection device 39 is small, the water introduced from the pipe connection port 55 is replenished. The flow rate pressure characteristic is led into the bathtub 26 through the use flow path 47, and becomes larger as the flow rate of water introduced into the fine bubble ejection device 39 increases as shown by the characteristic line a in FIG. Since the pressure shown on the horizontal axis in FIG. 11 is the pressure applied to the flow rate corresponding on-off valve 48, for example, the pressure applied to the pump discharge portion and the notch K portion at the same flow rate is a slightly large value.

  When the flow rate of water introduced into the fine bubble ejection device 39 becomes equal to or higher than the set flow rate (about 6 liters / minute in this case), the flow rate corresponding on-off valve 48 is moved to the spring 53 as shown in FIG. Since the water is closed against the urging force, the water cannot pass through the reheating channel 47 and is ejected into the bathtub 26 through the fine bubble generating channel 46. When the bath water circulates through the fine bubble generating channel 46, the relationship between the flow rate and the pressure applied to the fine bubble generating channel 46 is as shown by the characteristic line b. Since the flow path 46 for generating fine bubbles is very small and generates a large pressure even at a small flow rate, the flow rate must be reduced to nearly zero to open the flow rate corresponding on-off valve 48 (switching pressure). The flow rate is as low as below).

  The air introduction valve opening / closing control means 42 is preliminarily assumed when there is a bathtub on the second floor in conjunction with the number of rotations of the circulation pump 21 at the start of the fine bubble generation operation. The pump rotational speed at which the inside of the recirculation circulation path 25 becomes a negative pressure is set as the set rotational speed for the air layer non-forming mode, and the circulation pump 21 is turned on as shown, for example, in the on-timing of the air introduction valve in FIG. When the rotational speed is increased to the set rotational speed for the air layer non-forming mode and the recirculation circulation path 25 becomes a negative pressure (here, for example, after a delay time of 3 seconds elapses from switching of the rotational speed of the circulation pump 21) ), The air introduction valve 38 is opened. Further, at the time of the fine bubble generation operation, as shown in FIG. 8, in response to the mode switching timing from the air layer non-formation mode to the undissolved air layer formation mode, in the undissolved air layer formation mode (rotation of the circulation pump 21) When the number reaches the set rotation speed for air layer formation), the air introduction valve 38 is closed.

  In the undissolved air layer formation mode, the volume of the air layer A is adjusted as follows. That is, when the amount of undissolved air is measured by the electrodes 35 and 36 and the ground electrode 137 (see FIG. 13), and the amount of undissolved air in the tank exceeds a set amount (both electrodes 35 and 36) When the water level is not detected and is turned off, or when the water level of the electrode 35 is not detected and the water level of the stored water in the tank 31 is lower than the set low reference water level, for example, the air layer non-forming mode When the air introduction valve 38 is closed and the amount of undissolved air in the tank falls below a certain set amount (both electrodes 35 and 36 are turned on when the water level is detected, or when the water level detection of the electrode 36 is turned on) When the water level of the stored water in the tank 31 exceeds the set high reference water level, for example, the air introduction valve 38 is opened in the air layer non-forming mode, and the water level is between the electrode 35 and the electrode 36 (electrode 35 is on when the water level is detected. 36 when off) in water undetected performs previous air layer non-forming mode in the air introduction valve 38 (closing to the same state as open or closed state of the solenoid valve 65) (on-off) control. In the first detection of the water level, there is no open / close state of the electromagnetic valve 65 at the previous ON timing of the air introduction valve 38. In this case, the electromagnetic valve 65 is opened at the ON timing of the air introduction valve 38.

  In addition, when the electrodes 35 and 36 are electrodes of the same length and the electrode 36 is a ground electrode, the detection of the amount of undissolved air in the tank exceeds a set amount (the electrode 35 is turned off when the water level is not detected). When the water level of the stored water in the tank 31 becomes lower than the set low reference water level, for example, the air introduction valve 38 is closed in the air layer non-forming mode, and the amount of undissolved air in the tank is set. In the following case (when the electrode 35 is turned on by detecting the water level and the water level of the stored water in the tank 31 exceeds, for example, a set high reference water level), the air introduction valve 38 is set in the air layer non-forming mode. And adjust the water level in the undissolved air layer formation mode by adjusting the length so that the electrode is immersed in water or not (so that the air introduction valve 38 is closed in the undissolved air layer formation mode). The tank is undissolved at first. Even more than the set amount has air amount, gradually reduces the non-dissolved air content in the tank, the following is set amount, for example, by vibrating a hydraulic jump phenomenon). In this way, when the electrode 35 and the ground electrode become non-conductive, it is detected that the undissolved air in the tank is greater than or equal to the set amount. As a result of the measurement, the amount of undissolved air is less than the set value. May open / close control so that the air introduction valve 38 is opened and the air introduction valve 38 is closed when the amount of undissolved air is larger than the set value.

  When the electrode is constituted by two instead of three, the air introduction valve opening / closing control means 42 opens / closes the air introduction valve 38 at predetermined intervals during the fine bubble generation operation. At that time, based on the detection results of the electrodes 35 and 36 of the pressurized container 30, when the water level in the tank 31 exceeds the set water level, the time for opening the air introduction valve 38 is lengthened, and the water in the tank 31 is increased. The air introduction valve 38 may be controlled to be opened and closed so that the volume of the air layer between the water surface and the upper end of the container is increased so that the water level is equal to or lower than the set water level.

  That is, when the volume of the air layer decreases, the air introduction valve 38 is opened long (by increasing the valve opening time 30 seconds to 40 seconds, for example), and the circulation pump 21 is driven to take in the air. If the volume of the layer becomes too large, the circulation pump 21 is driven by extending the time for closing the air introduction valve 38 (by shortening the valve opening time 30 seconds to 20 seconds, for example).

  Note that the configuration of the air introduction valve 38 is not particularly limited, but may be configured as shown in FIG. 12, for example. The air introduction valve 38 has a main body portion 57 and a cover member 58, and the main body portion 57 is connected to the recirculation circulation path 25 via the circulation path connection section 62 and via the pouring path connection section 63. It is connected to the pouring channel 14 (see FIG. 6). The main body 57 is provided with an electromagnetic valve 65 and a check valve 61, and the cover member 58 is provided with an air inlet 60 and a filter 59.

  Air is introduced into the air introduction valve 38 by opening the electromagnetic valve 65 at a predetermined timing. That is, for example, in the case of performing control corresponding to the rotational speed of the circulation pump 21, the solenoid valve 65 is opened when the rotational speed reaches a specified value, and the control corresponding to the rotational speed of the circulation pump 21 is not performed. The air is taken in by the negative pressure created by the circulation pump 21 by opening the solenoid valve 65 after a predetermined time after the circulation pump 21 is started. Then, the check valve 61 moves to the right side in the figure by the force of the sucked air, and the air introduced from the air introduction port 60 through the filter 59 enters the passage 64 as shown by the arrow C in the figure. be introduced. The passage 64 is connected to the recirculation circuit 25, and the water passing through the recirculation circuit 25 flows as indicated by an arrow A in the figure, so that the air is dissolved in this water.

  Further, in the bath apparatus of the present embodiment, the amount of air introduced during the water circulation in the recirculation circuit 25 from 5.5 to 7 liters / minute is about 400 cc / minute to 700 cc / minute (when converted to 1 atm). ing. The control at 6 to 7 liters / minute is considered with allowance for fluctuations in the piping distance and the like, but the above-mentioned 5.5 liters / minute is applied to the filter 54 attached to the suction side of the fine bubble ejection device 39. It is a margin for clogging. In FIG. 12, when water is introduced from the pouring channel 14 as indicated by an arrow B in the figure, this water is introduced into the passage 64 and dropped into the bathtub 26 through the recirculation circuit 25.

  In FIGS. 14 to 17, an example of microbubble generation and reheating operation of the bath apparatus of the present embodiment is shown by a flowchart. Hereinafter, the bath apparatus to which the pressurized container 30 is applied based on this flowchart. Will be described. When the fine bubble generation switch (bubble generation switch) is turned on in step 1A (the operation of the fine bubble generation operation unit 43 is performed), the fine bubble ejection timer is started in step 2A. Next, in step 3A, it is determined whether or not the reheating switch is on. When the reheating switch is on, the process proceeds to step 3B. When the reheating switch is off, the circulation pump 21 sets the rotation speed to The operation is performed at a set rotation speed Lo for layer formation (2000 rpm). At this time, the pressure applied to the upstream of the flow rate corresponding opening / closing valve 48 of the fine bubble ejection device 39 is low, and the flow rate corresponding opening / closing valve 48 is open.

  Next, in step 5A, it is determined whether or not 3 seconds have passed since the fine bubble generating switch was turned on in step 1A. After 3 seconds, in step 6A, the water level of the bathtub 26 is confirmed for 3 seconds, for example. In step 7A, the rotational speed of the circulation pump 21 is set to the set rotational speed Hi (3500 rpm) for the air layer non-forming mode. If it does so, the pressure concerning the upstream of the flow corresponding on-off valve 48 will become high, and the flow corresponding on-off valve 48 will close. Further, the pump rotation speed Hi timer is started, and the process proceeds to step S1a in FIG. 16 or step S1b in FIG. If there are three electrodes 35, 36, and 137 for detecting the water level of the pressurized container, the process proceeds to step S1a in FIG. 16, and if there are two electrodes, the process proceeds to step S1b in FIG.

  When the process proceeds to step S1a in FIG. 16, it is determined whether or not the water level confirmation is the first time, and when it is the first time, the process proceeds to step S5a, and in step S5a, the 3-second timer is set as a star. As shown in FIG. 3, after the water level in the tank 31 is detected by the electrodes 35, 36, and 137, the air introduction valve 38 is not opened immediately, but the air introduction valve 38 is opened in advance. A delay time elapse is provided (after the water level is detected, the air introduction valve 38 is opened after the delay time elapses). In this embodiment, the delay time is set to 3 seconds, for example. In order to measure the delay time, the timer is turned on in step S5a of FIG.

  Further, when it is determined in step S1a that the water level confirmation is not the first time, the process proceeds to step S2a, and at the time of water level confirmation, it is determined whether or not the low water level electrode is on, and when it is off, the process proceeds to step 8A in FIG. When it is on, the process proceeds to step S3a. In step S3a, when the water level is confirmed, it is determined whether or not the high water level electrode is on. When it is on, the process proceeds to step S5a, and when it is off, the process proceeds to step S4a. In step S4a, it is determined whether or not the air introduction valve 38 was turned off during the previous operation of the circulation pump 21 at the rotational speed Hi. If it is turned off, the process proceeds to step S5a. Proceed to step 8A. When the process proceeds to step S5a, when the timer has elapsed for 3 seconds in step S6a, the air introduction valve 38 is turned on (the electromagnetic valve 65 is turned on) in step S7a, and the process proceeds to step 8A in FIG.

  On the other hand, when the process proceeds to step S1b in FIG. 17, it is determined whether or not there is no air layer in the pressurized container 30 when the water level is confirmed. If it is determined that there is no air layer, the air introduction valve is determined in step S2b. 38 is subtracted from a delay time (for example, 3 seconds) of timing for turning on 38 (solenoid valve 65 is turned on) for a predetermined set subtraction time, and the process proceeds to step S4b. If it is determined that there is an air layer, in step S3b, a predetermined set addition time is added to a delay time (for example, 3 seconds) of timing for turning on the air introduction valve 38 (turning on the electromagnetic valve 65). Then, the process proceeds to step S4b. In step S4b, when the delay time of the timing of turning on the air introduction valve 38 (turning on the electromagnetic valve 65) has elapsed, the air introduction valve 38 is turned on (turning on the electromagnetic valve 65), and the process proceeds to step 8A in FIG. .

  As described above, as shown in FIG. 3, after confirming the water level of the water stored in the tank 31 by the electrodes 35, 36, etc., the pump rotation speed is not formed from the set rotation speed for air layer formation (2000 rpm). After changing to the mode setting speed (3500 rpm), the air introduction valve 38 is normally opened and closed (on / off) after a predetermined delay time (for example, 3 seconds). The delay time is lengthened (added) or shortened (subtracted) as shown in the operation diagram of (the flowchart in the case where the electrode is composed of two electrodes, the water level electrode 35 and the ground electrode). You may do it. That is, the opening / closing control may be performed so as to control the delay amount of the timing for opening the air introduction valve 38.

  In step 8A in FIG. 14, it is determined whether or not the reheating switch is on. When the reheating switch is off, the process proceeds to step 12A. When on, the reheating burner 16 is ignited at step 9A. It is determined whether or not the temperature detected by the bath temperature sensor 18 is higher than the bath set temperature. When the temperature detected by the bath temperature sensor 18 is equal to or lower than the bath set temperature, the process proceeds to step 12A. When the temperature detected by the bath temperature sensor 18 is higher than the bath set temperature, the reheating switch is turned off and the reheating burner 16 is turned off at step 11A. After the fire is extinguished, the process proceeds to step 12A. In step 12A, it is determined whether or not 30 seconds have elapsed since the pump rotation speed Hi timer was turned on. When the time has elapsed, the routine proceeds to step 13A in FIG. 15, where the air introduction valve 38 is turned off (the electromagnetic valve 65 is turned off). .

  Next, in step 14A in FIG. 15, it is determined whether or not the reheating switch is turned on. When it is turned on, in step 15A, the combustion lamp of the remote control device (lamp indicating that combustion is being performed) is kept on. Turn off the burner 16. If it is determined in step 14A that the reheating switch is off, the rotational speed of the circulation pump 21 is set to Lo (2000 rpm) in step 16A. Here, since the flow rate corresponding on-off valve 48 of the fine bubble ejection device 39 remains closed, the pressure applied upstream of the flow rate corresponding on-off valve 48 is high. Thereafter, the process proceeds to step 17A in FIG. 14, and if it is determined that 3 seconds have elapsed since the rotational speed Lo (2000 rpm) of the circulation pump 21 is reached, the process returns to step 6A.

  If it is determined in step 12A of FIG. 14 that 30 seconds have not elapsed since the pump rotation speed Hi timer was turned on, the process proceeds to step 18A, where a predetermined set time has elapsed. If it is determined whether or not the fine bubble generation switch is turned off and at least one of them is performed, the process proceeds to step 19A, and if not, the process returns to step 8A. In step 19A, the air introduction valve 38 is turned off (the electromagnetic valve 65 is turned off). In step 20A, it is determined whether or not the reheating switch is turned on. When the reheating switch is turned off, the circulation pump 21 is turned on in step 23. When turned off and on, the process proceeds to step 21A.

  In step 21A, the reheating burner 19 is turned off and the circulation pump 21 is turned off. When the circulation pump 21 is turned off, the flow rate corresponding on-off valve 48 of the fine bubble ejection device 39 is opened. When the flow rate corresponding on / off valve 38 is opened, the process proceeds to step 22A, and the circulation pump 21 is operated at the rotation speed Lo (1700 rpm) in the reheating operation when the flow rate corresponding on / off valve 48 is opened (during the fine bubble non-ejection operation). Since the pressure applied to the flow rate corresponding on / off valve 38 during operation of the circulation pump 21 at this rotational speed Lo (1700 rpm) is low, the flow rate corresponding on / off valve 38 remains open.

  Further, when the reheating switch is turned on at step 1B in FIG. 14 (the operation of the reheating operation command operation unit 44 is performed), at step 2B, the circulation pump 21 sets the rotation speed to the flow rate corresponding on-off valve. 48 is operated as the rotational speed Lo (1700 rpm) in the reheating operation when the valve is opened. At this time, the pressure applied to the upstream of the flow rate corresponding opening / closing valve 48 of the fine bubble ejection device 39 is low, and the flow rate corresponding opening / closing valve 48 is open. After the operation of the circulation pump 21 is started, the process proceeds to Step 3B. Even after the operation of step 22A, the process proceeds to step 3B.

  In step 3B, it is determined whether or not the bath water switch 22 is turned on. When the water switch 22 is turned off, the reheating burner 16 is turned off in step 8B, and the process returns to step 3B, and when the water switch 22 is turned on. In step 4B, ignition of the reheating burner 16 is performed, and the process proceeds to step 5B. In step 5B, it is determined whether or not the temperature detected by the bath temperature sensor 18 is higher than the bath set temperature. If higher, the circulation pump 21 is turned off in step 6B, the reheating switch is turned off, and the reheating burner 16 is turned on. Is also turned off. When the detected temperature of the bath temperature sensor 18 is equal to or lower than the bath set temperature, it is determined at step 7B whether or not the fine bubble generation switch is on. When it is on, the process proceeds to step 4A. Return to.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, in the above embodiment, the air introduction valve opening / closing control means 42 controls the air introduction valve 38 as shown in FIG. 3, but at the first time (when the cloudy operation starts), the pump rotation is set to Hi. Even after the delay time has passed, the air introduction valve 38 may be kept closed until a preset delay extension time elapses. When the delay time is extended in this way (for example, when the time is extended from 3 seconds to 5 seconds), the pressure applied to the nozzle 45 is reduced to a pressure at which fine bubbles are sufficiently generated by closing the air introduction valve 38. This is because the time period during which the fine bubbles are generated is increased because the bubbles are raised in a short time and the fine bubbles are rapidly generated, and as a result, the average turbidity is improved.

  Note that the present inventor, for example, in the above embodiment, when the time until the air introduction valve 38 is not opened is delayed, that is, when the air introduction valve 38 is not closed, the pressure rises to a pressure at which fine bubbles are sufficiently generated. It takes 15 seconds, but as described above, it is confirmed that the rising time is increased by 10 seconds by extending the delay time by 2 seconds and performing the shut-off operation of the air introduction valve 38. .

  Further, as in the pressurized container 30, the presence or absence of the formation of the air layer A is detected by the electrodes 35, 36, and 137 (that is, the upper end of the bubble that spreads on the water or the water surface is applied to the electrodes 35, 36, and 137). If it is touched or not touched), detailed information such as whether water is in the tank up to the eighth minute or the sixth minute cannot be obtained. For example, even when it is determined that there is an air layer A (that is, when the flow rate is small), undissolved air in the air layer A is dissolved in water, and the volume of the air layer A is reduced. , 36, 137 may be determined to have no air layer A even after a short time. Therefore, by slightly changing the on / off timing of the air introduction valve 38, the opening time of the air introduction valve 38, the opening degree, etc., the water or the upper end of the bubble spreading on the surface of the water touches the electrodes 35, 36, and 137. It ’s a good idea to control it.

  Furthermore, for example, as shown in FIG. 41, since the solubility of air becomes low (difficult to dissolve) when the water temperature becomes high, the air introduction valve 38 of the same water temperature condition as in the previous cloudy operation (fine bubble generation operation) is used. Refer to the open / close control conditions. If the control condition of the air introduction valve 38 at this time is 3 times ON and 1 time OFF, the flow rate is changed to the flow range for creating the air layer A (change to the undissolved air layer formation mode). Even at the timing, continuous operation is performed in the flow rate range (air layer non-forming mode) that does not create the air layer A (for example, five continuous operations with the air introduction valve turned on three times and turned off once) The amount of air dissolved in water may be increased.

In addition, the kinematic viscosity coefficient decreases from 0.000001004 [20 ° C kinematic viscosity coefficient (ν: m ² / s)] to 0.000000658 [40 ° C kinematic viscosity coefficient (ν: m ² / s)]. Therefore, the apparatus with the function of generating fine bubbles according to the present invention, when the mode switching control means 40 performs the operation in the air layer non-forming mode while retreating, is compared with the air layer non-forming mode without retreating. Thus, the timing of entering the undissolved air layer formation mode may be increased.

  Further, for example, the air introduction valve 38 is controlled by the balance between the amount of the air layer A formed in the pressurized container 30 and the control of the air introduction valve 38 in the flow rate region (in the undissolved air layer formation mode) for creating the air layer A. Is 3 seconds ON and 1 second OFF, there is an air layer. For example, when the air introduction valve 38 is ON for 2 seconds and OFF for 1 second, the air layer A may disappear. Therefore, according to the open / close control of the air introduction valve 38, the amount of the air layer A is grasped, and the air introduction valve is continuously operated in a flow rate range where the air layer A is not formed based on the grasped amount. 38 open / close control or linear air flow rate control may be performed.

  And the estimated air layer in the flow rate region (in the undissolved air layer formation mode) that operates under the same water temperature conditions as the previous cloudy operation (the air introduction valve is turned on three times and turned off once) and creates the air layer A When the estimated air layer grasping amount is different from the previous value, the following determination is made. That is, when the estimated air layer grasping amount is larger than the previous value, it is determined that the filter 54 is clogged more than the previous value, or the estimated air layer grasping amount is smaller than the previous value. In such a case, it is determined that the filter 54 has been cleaned.

  Thus, if it is determined that the flow rate is different due to the resistance change in the filter 54 even if the pump speed is the same, for example, if it is determined that the filter 54 is clogged more, Increase the pump speed in the flow rate range where the layer A is not formed (in the air layer non-forming mode) or switch the air introduction valve control method (for example, the air introduction valve 38 is turned on once and turned off once) Instead of the control method, the air introduction valve 38 may be turned on twice and turned off twice. Moreover, if both of these controls are performed to change both the amount of water and the amount of air, the operation in the undissolved air layer formation mode can be further reduced, thereby further increasing the turbidity.

  As shown in FIG. 41, the solubility data of air according to the water temperature is given in advance, and the temperature of the bath water (tub water) in the previous cloudy operation (fine bubble generation operation) and the current cloudy operation Is different, the opening / closing control of the air introduction valve 38 is made variable in accordance with the temperature of the bath water, thereby reducing the operation in the flow rate region (undissolved air layer formation mode) for creating the air layer. It may be. For example, it is assumed that the condition is just right when the air introduction valve 38 is turned on three times and turned off once (0.75 times ON) at a water temperature of 20 ° C. during the previous cloudy operation. If the water temperature is 40 ° C. during this cloudy operation, the solubility of air in water is about 75% of the gas solubility at a water temperature of 20 ° C. as shown in FIG. = It is good to change the air introduction valve 38 to 2 times OFF and 2 times OFF (0.5 times ON) so that the control is close to about 0.56 times ON. Further, the ON time may be varied so as to be slightly longer than OFF, and may be close to 0.56 times.

  Further, particularly in winter, when the temperature of the air introduced from the air introduction valve 38 is low (eg, 0 ° C.) and the temperature difference between the air temperature and the bath water temperature (eg, 40 ° C.) is large, ), The temperature of the bath water decreases, and if the bubble generation continues while chasing, the temperature of the bath water increases. The air solubility corresponding to the temperature of the bath water is estimated based on this, and based on this estimated value, the ON / OFF frequency ratio and ON time of the air introduction valve 38 are varied to operate in the undissolved air layer formation mode. You may make it reduce. The position of the bath temperature sensor 18 may be between the two heat exchanges shown in FIG. 1, but it is not affected by the temperature of the air sucked from the air introduction valve 38 than the air introduction valve 38 (on the heat exchange side and It may be the position on the bathtub side (the opposite side).

  As described above, the relation data between the water temperature and the gas solubility is given in advance, and the optimum data for the on / off control of the air introduction valve 38 according to the gas solubility is given, so that it is estimated according to the water temperature. If the on / off control of the air introduction valve 38 is performed based on the optimum data in accordance with the solubility of the air (obtained from the relational data between the water temperature and the gas solubility), the air introduction valve according to the volume of the air layer A 38 can be controlled on and off, and accordingly, the operation time in the undissolved air layer formation mode is reduced, and the operation time in the air layer non-formation mode is increased to further increase the turbidity of the bath water. it can.

  Furthermore, in the apparatus with a fine bubble generating function of the present invention, the air layer formation set rotation speed Lo and the air layer non-formation mode setting rotation speed Hi may be determined as follows. That is, the pipe distance (pipe resistance) cannot be determined until construction work is completed, and the filter 54 is clogged (pipe resistance increases) as it is used repeatedly, and the filter 54 is cleaned. Then, the pipe resistance suddenly decreases, so the air introduction valve 38 is turned on (the electromagnetic valve 65 is turned on) at the start of use after the completion of construction work or every time the use is started, and the rotation speed of the circulation pump 21 is reduced to fine bubbles. After the flow rate corresponding on / off valve 48 of the ejection device 39 is raised to a closed speed, the flow rate corresponding on / off valve 48 is once lowered to a speed at which the flow rate corresponding on / off valve 48 can be kept closed, and then the speed of the circulation pump 21 is increased. However, it may be determined whether or not each electrode is turned on, and the points that disappear in the air layer formation state may be determined. As described above, if the boundary rotational speed for determining the air layer formation setting rotational speed Lo and the air layer non-forming mode setting rotational speed Hi is determined based on the construction state and use state, an accurate rotational speed setting is possible. is there.

  Furthermore, in the apparatus with the function of generating fine bubbles of the present invention, when the mode switching control means 40 is used, the jumping phenomenon classification formed in the water flow in the pressurized container 30 is not changed, but only in the air layer non-formation mode. In the undissolved air layer formation mode (for example, mainly focusing on the measurement of the amount of air layer without dissolving the air), the water flow in the undissolved air layer formation mode is normal. It doesn't matter. In addition, the jet flow in the air layer non-formation mode at this time may be a fluid number of 1 or more, but it is needless to say that a fluid number of 1.7 or more, which is a boundary between wave jump water and weak water jump water, is preferable.

  Further, when switching is performed by the mode switching control means 40 depending on the ambient temperature of the pressurized container 30, the water temperature, the presence or absence of bathing agent, the atmospheric pressure, the state of the inner wall of the pressurized container 30, etc., the number of fluids serving as a guide changes. Therefore, during the operation to generate fine bubbles, the learning mode control means that detects where the fluid number of the boundary that is a reference is moving under the operating conditions and detects the target fluid number based on the detection result The switching control unit 40 may be provided so that the mode switching control unit 40 performs switching control between the undissolved air layer formation mode and the air layer non-formation mode based on the detection result by the learning mode control unit.

  Hereinafter, an example using each specific example of the pressurized container 30 of the application example of the above embodiment of the detection mode of the target fluid number and the control method based on the detection mode will be described. First, in the case of the application example of the embodiment, since the jumping classification shown in FIG. 23B is the basis, the fluid number at the boundary between the vibration jumping and the steady jumping is set to 6.2 based on the jumping classification, and 6.2. Is given in advance to the learning mode control means of the mode switching control means 40 as the initial value of the boundary fluid number between the vibration jump and the steady jump. Similarly, the fluid number at the boundary between the steady jump and the strong water jump is set to 12.3, and 12.3 is given in advance to the learning mode control means as the initial value of the boundary fluid number between the steady jump and the strong water jump. deep.

Next, the relationship between the flow rate of water introduced into the pressurized container 30 and the pump rotational speed is obtained as follows. For example, in the embodiment applications, notch when the total area of the K is a specific example of 126 mm ^2, 105 mm ^2, by driving the circulation pump 21 pressurized vessel 30 below the flow rate of the water to be introduced into (a) to The flow rate of water to be introduced into the pressurized container 30 and the rotation of the pump are stored by storing the number of rotations (pump rotation number) of the circulation pump 21 for each flow rate at that time. Find the relationship with the number and remember the relationship.

(A): The flow rate at which the Froude number is smaller than the initial value (6.2) of the boundary fluid number between the vibration jump and the steady jump, and the flow rate of water causing the vibration jump (the amount of undissolved air can be measured = air (When there is a layer) and the pump rotation speed at that time (b): The flow rate corresponding to the fluid number of the value near the initial value that is equal to or greater than the initial value (6.2) of the boundary fluid number between the vibration jump and the steady jump Therefore, the flow rate of water that causes steady jumping (undissolved air volume cannot be measured = no air layer) and the number of pump revolutions at that time (C): Initial value of the boundary fluid number between vibration jumping and steady jumping (6. 2) The flow rate at which the fluid number is larger than the flow rate of water that causes steady jumping (undissolved air volume cannot be measured = no air layer), and the pump speed at that time

In the specific example in which the total area of the notches K is 126 mm ² , the flow rate of water in which the fluid number in (a) is smaller than the initial value 6.2 is, for example, 6.5 liters / min. The flow rate of water at which the Froude number is near the initial value 6.2 (but 6.2 or more) is, for example, a flow rate of 7 liters / minute, and the water whose Froude number in (c) is greater than the initial value 6.2 The flow rate is, for example, 7.25 liters / minute.

  Next, the flow rate at the boundary between the undissolved air layer formation mode and the air layer non-formation mode and the fluid number of the boundary during the actual operation of the apparatus with the fine bubble generation function are obtained as follows.

For example, when the user presses the cloudiness switch on the remote controller, the apparatus with a function of generating fine bubbles such as a bath apparatus first sets the flow rate of water to 5 liters / minute, which is smaller than the flow rate of (a). The circulation pump 21 is driven (at a flow rate at which water collapse that creates the air layer A occurs) to fill each part (in the pipe) with water. Thereafter, the number of revolutions of the circulation pump 21 is gradually increased, and the water level in the pressurized container 30 is detected by the electrodes 35, 36, and 137, and the flow rate of water and the number of revolutions of the pump when there is no air layer are measured. And memorize (referred to as flow rate Q _a and rotational speed R _a ).

Thereafter, the pump rotation is gradually lowered, and the water level detection operation in the pressurized container 30 is performed by the electrodes 35, 36, and 137, and the water flow rate and the pump rotation speed when the air layer (air layer) is present. Are measured respectively (flow rate Q _b , rotation speed R _b ), pump rotation speed (R _b ), water flow rate (Q _b ), and last time (the rotation of the pump is gradually increased to eliminate the air layer) The average value of the pump rotation speed (R _a ) and the flow rate (Q _a ) of water (the average value of the flow rate is (Q _a + Q _b ) / 2, and the average value of the rotation speed is (R _a + R) _b ) / 2). Then, the obtained value is set as a provisional value of the flow rate of water at the boundary between the vibration jump and the steady jump and a provisional value of the pump speed corresponding to the flow rate of the water.

  In this way, the reason for obtaining the average value is that the presence or absence of the air layer is determined with a delay of one tempo with respect to the change in the pump rotation speed. This is so that it can be requested. When the change in the pump speed is so gentle that the measurement delay can be ignored, only one of the two measurements is performed, and the flow rate of water obtained by the measurement and the pump rotation are measured. The numerical value may be a provisional value of the boundary flow rate between the vibration jump and the steady jump and the pump rotation speed corresponding to the flow rate.

  Then, for example, the provisional value of the number of fluids at the boundary (the number of provisional fluids) is obtained from the provisional value of the flow rate of water at the boundary, and how much the provisional fluid number has moved from the initial value of the number of fluids at the boundary. Find the percentage. For example, if the value of the provisional fluid number is 6.6, X is the provisional value of the number of fluids / the number of fluids, where X is the rate of movement of the fluid number serving as the boundary between the vibrational jump and the steady jump. Initial value = 6.6 / 6.2 = 1.005 It can be seen that the fluid number at the boundary moves 1.065 times.

  Thus, when the fluid number has shifted from the initial value 6.2 to 6.6 (when the flow rate at the boundary has actually changed, only the engine speed increases due to filter clogging and the engine speed increases. The actual flow rate is small compared to the flow rate expected from the above, and the boundary flow rate may not actually change (in any case, etc.). The flow rate (number of rotations) corresponding to the fluid number initial value 6.2) of steady jumping must be moved.

  That is, how much the boundary between the vibration jump and the steady jump is moved, or how much the filter is clogged, and in order to cancel them, the initial value 6.2 of the steady jump is multiplied by the moving magnification and the target is set. Find the fluid number. In this example, 6.2 × 1.065 = 6.6. Then, the flow rate of water corresponding to the target fluid number is calculated from the target fluid number (here, 6.6).

For example, when the height (h) of the notch K is 2 mm, the critical flow c = √ (gh) = √ (9.8 × 0.002) = 0.141421 m / second (where gravitational acceleration: 9.8 m / second) since the seconds ^2), limits the flow rate of water flow through the cutout K is about 140 mm / sec (141.421mm / sec). Accordingly, the value of the flow velocity (WLO) passing through the notch K at the fluid number 6.6 which is the target fluid number is 141.421 × 6.6 = 933.3786, which is about 933 mm / sec. The flow rate delivered by this pump is 933.3786 × 126 × 60 = 70556342 mL / min. That is, the flow rate of water corresponding to the target fluid number is about 7 liters / minute, and the flow rate at the boundary between the case where the undissolved air layer A is formed in the pressurized container 30 and the case where the air layer A is not formed is , Approximately 7 L / min (approximately 7 liters / min).

  Therefore, the flow rate of water during the undissolved air layer formation mode operation and the air layer non-formation mode operation is determined based on the boundary flow rate of 7 L / min. That is, based on the boundary flow rate (approximately 7 L / min) of the vibration jump and the steady jump water, in the undissolved air layer formation mode operation, for example, the pump is driven to rotate at a rotation speed corresponding to 7-0.25 L / min. In the air layer non-forming mode operation, for example, the pump is driven to rotate at a rotational speed corresponding to 7 + 0.25 L / min. The pump rotation speed corresponding to each water flow rate is based on the relationship data between the water flow rate and the pump rotation rate stored on the basis of the water flow rate and the pump rotation number in (a) to (c) above. In addition, since the volume of water varies depending on the water temperature, preferably, the temperature of each pump is determined by adding a water temperature correction.

In the case of the application example of the embodiment, the jumping water classification of FIG. 23B is basically used. However, in the pressurized container 30 of the application example of the embodiment, the cutout K has a total area of 84 mm ² and the cutout. In a specific example in which the total area of K is 63 mm ² , the fluid number at the boundary between the vibration jump and the steady jump is greater than 6.2 due to the boundary movement due to the water collapse room. Therefore, from the relationship shown in (Table 1), the initial value of the number of boundary fluid between the vibration hydraulic jump and the constant hydraulic jump total area in the specific example of 84 mm ² of notch K as 7.4, the learning mode control means Give it. In the specific example in which the total area of the notch K is 84 mm ² , in the specific example in which the total area of the notch K is 126 mm ² , the fluid flow, the provisional fluid number, and the target fluid number are calculated. Instead of using 6.2 as the initial value of the number, the flow rate of water, the provisional fluid number, and the target fluid number are obtained using 7.4 as the initial value of the fluid number.

In the specific example in which the total area of the notches K is 63 mm ² , the initial value of the boundary fluid number between the vibration jump and the steady jump is set to 9.9 from the relationship shown in (Table 1). Give it.

Further, in the specific example in which the total area of the notches K is 63 mm ² , as described above, it is confirmed that strong jump water is generated when the flow rate of water is 6 liters / minute or more, and the fluid number is 11.3. There is a strong water jump in the area (boundary movement, which is thought to be caused by an increase in the contact area with the tank impregnated surface, is less than expected due to the high flow rate and little water collapse, and the fluid number is In this case, it is confirmed that strong water jump occurs at 11.3 smaller than 12.4 shown in FIG. 23 (b)), so the initial value of the boundary fluid number between steady jump water and strong water jump water is obtained. The value is given to the learning mode control means as 11.3 (Note that the value of the boundary fluid number at which strong water jump occurs may be smaller than 11.3, but to what extent the boundary movement is performed. Is not confirmed).

  And the circulation pump 21 is driven, and the flow rate of the water introduced into the pressurized container 30 is set to each of the following three flow rates (A) to (C). By storing the rotational speed (pump rotational speed), the relationship between the flow rate of water introduced into the pressurized container 30 and the rotational speed of the pump is obtained, and the relationship is stored.

(A): Flow rate at which the Froude number is smaller than the initial value (9.9) of the boundary fluid number between vibration jumping and steady jumping, and the flow rate of water causing vibration jumping (undissolved air volume can be measured = air (When there is a layer) and the pump rotation speed at that time (b): The flow rate corresponding to the fluid number of the value near the initial value that is equal to or greater than the initial value (9.9) of the boundary fluid number between vibrational jumping and steady jumping The flow rate of water causing steady jump (undissolved air volume cannot be measured = when no air layer is present) and the pump speed at that time (C): Initial value of the boundary fluid number between steady jump and strong jump (11 There is a flow rate that gives a fluid number greater than 11.3), which is a larger value, and the flow rate of water that causes strong jump water (undissolved air volume cannot be measured = when there is no air layer), and the pump speed at that time

  The flow rate of water in which the fluid number in (a) is smaller than the initial value 9.9 is, for example, 5 liters / minute, and the fluid number in (b) is a value of 9.9 or more near the initial value 9.9. The flow rate of water becomes, for example, a flow rate of 5.5 liters / minute, and the flow rate of water at which the fluid number of (c) becomes an initial value of 11.3 or more is, for example, 6 liters / minute.

Next, even in a specific example in which the total area of the notches K in the pressurized container 30 of the application example of the embodiment is 63 mm ² , the undissolved air layer formation mode and the air layer non-actuation during the actual operation of the apparatus with the fine bubble generation function The flow rate of the boundary with the formation mode (the boundary between the region where the air layer A is formed and the region where the air layer A is not formed) and the fluid number of the boundary are obtained in the same manner as in the specific example in which the total area of the notch K is 126 mm ² The obtained value is set as a provisional value of the flow rate of water at the boundary between the vibration jump and the steady jump and a provisional value of the pump speed corresponding to the flow rate of the water.

  Then, for example, the provisional value of the number of fluids at the boundary (the number of provisional fluids) is obtained from the provisional value of the flow rate of water at the boundary, and how much the provisional fluid number has moved from the initial value of the number of fluids at the boundary. Find the percentage. For example, if the value of the provisional fluid number is 10.54, X is the provisional value of the fluid number / the number of fluids, where X is the rate of movement of the fluid number serving as the boundary between the vibration jump and the steady jump. Initial value = 10.54 / 9.9 = 1.065 It can be seen that the fluid number serving as the boundary moves 1.065 times.

  Thus, when the fluid number has moved from the initial value of 9.9 to 10.54 (when the flow rate at the boundary has actually changed, only the rotational speed has increased due to filter clogging and the rotational speed has increased. The actual flow rate is small compared to the flow rate expected from the above, and the boundary flow rate may not actually change (in any case, etc.). The flow rate (number of rotations) corresponding to the fluid number initial value 9.9) of steady water jump must be moved.

  That is, how much the boundary between the vibration jump and the steady jump is moved, or how much the filter is clogged, and in order to cancel them, the initial value 9.9 of the steady jump is multiplied by the moving magnification and the target Find the fluid number. In this example, 9.9 × 1.065 = 10.54. Then, the flow rate of water corresponding to the target fluid number is calculated from the target fluid number (here, 10.54).

For example, when the height (h) of the notch K is 2 mm, the critical flow c = √ (gh) = √ (9.8 × 0.002) = 0.141421 m / second (where gravitational acceleration: 9.8 m / second) since the seconds ^2), limits the flow rate of water flow through the cutout K is about 140 mm / sec (141.421mm / sec). Therefore, the value of the flow velocity (WLO) passing through the notch K at the fluid number of 10.54, which is the target fluid number, is 141.421 × 10.54 = 1491, which is about 1491 mm / sec. The flow rate delivered by is 1490.5773 × 63 × 60 = 56334382 mL / min. That is, the flow rate of water corresponding to the target fluid number is about 5.6 liters / minute, and the boundary between the case where the undissolved air layer A is formed in the pressurized container 30 and the case where the air layer A is not formed is formed. The flow rate is about 5.6 L / min (about 5.6 L / min).

  Therefore, the flow rate of water during the undissolved air layer formation mode operation and the air layer non-formation mode operation is determined based on the boundary flow rate of 5.6 L / min. That is, based on the boundary flow rate (approximately 5.6 L / min) of the vibration jump and the steady jump water, in the undissolved air layer formation mode operation, for example, equivalent to 5.6-0.25 L / min (corresponding to 5.35 L / min) ), And in the air layer non-forming mode operation, for example, the pump is driven at a rotational speed corresponding to 5.6 + 0.25 L / min (corresponding to 5.85 L / min). The pump rotation speed corresponding to each water flow rate is based on the relationship data between the water flow rate and the pump rotation rate stored on the basis of the water flow rate and the pump rotation number in (a) to (c) above. In addition, since the volume of water varies depending on the water temperature, preferably, the temperature of each pump is determined by adding a water temperature correction.

By the way, in the specific example in which the total area of the notches K in the pressurized container 30 of the application example of the embodiment is 63 mm ² , strong water jump is generated at a fluid number of 11.3 (steady water jump and strong water jump) The initial value of the boundary fluid number is 11.3), and the flow rate of water at this time is 6 liters / minute. Therefore, the boundary flow rate (approximately 5.6 L / minute) between the vibration jump and the steady jump water and the steady jump The difference between the boundary flow rate and the strong water jump is small. Therefore, if the flow rate of water in the non-air forming mode is made slightly larger than the boundary flow rate between the vibration jump and the steady jump, the flow rate of the water can be made higher than the boundary flow between the steady jump and the strong jump. . Then, if the flow rate of water is set to be equal to or higher than the boundary flow rate between the steady jump water and the strong water jump, it is desirable to generate the strong water jump because the turbidity can be improved.

  Therefore, if the target fluid number at the boundary between steady and strong water jumps is determined as follows and the flow rate is larger than the target fluid number in the non-air layer formation mode, strong water jumps will be generated. Is preferable because it becomes possible. Here, the rate Xk at which the fluid number at the boundary between the steady jump and the strong jump is moving is the same value as the rate X at which the fluid number at the boundary between the vibration jump and the steady jump is moving. Therefore, it is considered that Xk = X = 10.54 / 9.9 = 1.065, and the initial value 11.3 of the Froude number serving as a boundary between steady jump and strong jump is set to this value. When multiplied, the target fluid number is 12.

  Since the value of the flow velocity (WLO) passing through the notch K when the fluid number is 12 is 141.421 × 12 = 1699.052, it is about 1697 mm / second, and the flow rate delivered by the pump at this time is 1697.052. × 63 × 60 = 64148856.56 mL / min (about 6.4 L / min). Therefore, the water flow rate in the non-air layer formation mode is set to 6.65 liters / minute (6.4 + 0.25 liters / minute) based on 6.4 liters / minute (fluid number causing strong jump water). Then, strong water jump can be generated in the air layer non-forming mode.

  Therefore, as described above, the mode switching control means 40 performs the rotational drive of the pump at a rotational speed equivalent to 5.35 L / min in the operation in the undissolved air layer formation mode, and in the operation in the air layer non-formation mode. Instead of driving the pump at a rotational speed corresponding to 5.85 L / min, it is preferable to drive the pump at a rotational speed corresponding to 6.65 L / min, for example.

  That is, the flow rate / pump of the undissolved air layer formation mode operation based on the flow rate / pump rotation speed (flow rate equivalent to 5.6 L / min / pump rotation rate) at the boundary where the amount of undissolved air can be measured. The number of revolutions was determined (for example, 5.35 L / min equivalent flow rate / number of revolutions). In the operation in the air layer non-forming mode, the calculation was performed backward from the fluid number initial value at the boundary between steady jumping and strong jumping. When an air layer non-formation mode operation (for example, operation at a flow rate / rotation number equivalent to 6.65 L / min) is performed based on the flow rate / pump rotation number (for example, flow rate / pump rotation speed corresponding to about 6.4 L / min) Good.

That is, as in the specific example in which the total area of the notches K in the pressurized container 30 applied to the embodiment is 126 mm ² , the flow rate of water (vibrating jumping water and Even if the water flow rate is increased within the predetermined allowable range, the boundary of the next water jump classification (boundary between the steady water jump and the strong water jump) is not exceeded. However, the air layer non-formation mode flow rate / pump rotational speed may be determined only by the flow rate / pump rotational speed at the boundary where the amount of undissolved air can be measured. In the case where the boundary of the next jumping water classification can be exceeded when the flow rate of water is increased within the allowable range as in the specific example in which the total area of the notches K is 63 mm ² , the air layer is not formed. The flow rate of water during operation of the When determined using the initial value of the field Froude number, preferably it is able to reduce the turbidity increase. The allowable range is formed in the pressurized container 30 in the undissolved air layer formation mode when the specification of the apparatus with a fine bubble generating function to which the pressurized container 30 is applied or the flow rate of water is changed. This is a range determined so that the bubble length is appropriate.

Incidentally, as in the specific example in which the total area of the notches K is 63 mm ² in the above embodiment, the initial value of the boundary fluid number between the steady jump water and the strong water flow is 11 without causing the boundary movement due to the water collapse. In the case of 12.4 instead of .3, assuming that the fluid number at the boundary between steady jumping and strong jumping is moving at the same rate as described above, when operating in the air layer non-forming mode, In order to generate a strong water jump, the target fluid number is 12.4 × 10.54 / 9.9 = 13.2.

  Further, in the above example, the flow rate of water at the boundary between the undissolved air layer formation mode and the air layer non-formation mode is obtained using the boundary of the vibration jump and the steady jump in the tank shape of the pressurized container 30. However, in addition to the above, the boundary of the jump water includes the boundary of the wave jump and the weak jump water, the boundary of the weak jump and the vibration jump, and the boundary of the steady jump and the strong jump water. Determine the appropriate boundary flow rate according to the shape, material, inner surface treatment, etc., and based on the boundary flow rate, determine the pump speed in undissolved air layer formation mode operation and air layer non-formation mode operation and perform each mode operation May be. Furthermore, since the weak jump water may be divided into weak jump water and breaking wave weak jump water, the boundary between the weak jump water and the breaking wave weak jump water (in the case of a river, the fluid number is 2.1) In the case of a shape such as an application example, the calculation may be performed using a fluid number of 2.5).

  Furthermore, for example, when the undissolved air layer formation mode operation and the air layer non-formation mode operation can be performed based on the boundary flow rate where the wave jump and the weak flow jump occur, the vibration jump, It is conceivable to perform the air layer non-formation mode operation in each boundary basin where the water jump and strong water jump occur (region where the fluid number is slightly larger than the boundary). In other words, the air layer non-formation mode operation is not performed based on the boundary flow rate at which the undissolved air layer formation mode operation and the air layer non-formation mode operation can be performed, but the boundary of the jumping water classification above the boundary is used. It is conceivable to perform an air layer non-forming mode operation.

  For example, an undissolved air layer formation mode operation is performed in a laminar flow, and an air layer is formed in a region where the jumping water classification is weak jumping water with the boundary between laminar flow-wave jump and the boundary of wave jump-weak jump When operating in the non-formation mode, or as in the application example of the above example, the undissolved air layer formation mode operation is performed by vibration jumping, and the boundary between the vibration jump-steady jump and the boundary of the strong jump-strong jump This is a case where the operation in the air layer non-formation mode is performed in a region where the water jump classification is strong water jump across the two boundaries. In that case, boundary movement occurs at the boundary of weak and vibrational jump, boundary of vibration and steady jump, boundary of steady and strong jump, respectively. The mode switching operation by the mode switching control means 40 may be performed by determining the target fluid number by the learning mode control means, determining the flow rate of water and the pump rotation speed based on the target fluid number.

  Furthermore, in the said Example, although the mode switching control means 40 was provided and it was set as the structure which switches an undissolved air layer formation mode and an air layer formation mode, as shown in FIG.2 (b), it provided in the said Example. When the mode switching control means 40 is omitted and the operation of dissolving the air in the water by the pressurized container 30 is performed, the flow rate of the water introduced into the pressurized container 30 is controlled to control the inside of the tank 31 of the pressurized container 30. At least one of the undissolved air and the air sent from the pump 21 is dissolved in the water in the tank 31, the undissolved air that has not been dissolved is separated, and the air layer A of the undissolved air is separated from the tank 31. Only the operation formed inside may be performed.

  Furthermore, the present invention is not limited to a bath apparatus, but can be applied as appropriate to apparatuses with various fine bubble generation functions. Further, when a device with a fine bubble generating function is used as a bath device, the bath device is not limited to the configuration of the above-described embodiment, and is appropriately set, for example, water supplied to a bathtub It is good also as a bath device only of the reheating function of the type which repels, and may have other functions, such as a heating function and a solar-heat collection function. The bath device may be a device that burns fuel other than gas to heat water to make hot water, or may be a device that heats water by electricity to make hot water, and the details are set as appropriate. Is.

  In addition, when the apparatus with the function of generating fine bubbles to which the pressurized container of the present invention is applied is a bath apparatus, in the above embodiment, air is introduced using the negative pressure of the circulation pump 21 (circulation). When the suction side of the pump 21 becomes negative pressure, air is introduced), but as described above, for example, a system configuration as shown in FIG. 39 is formed, and the air introduction valve 38 is combined with the air pump 121, A configuration may be adopted in which air is sent from the discharge side of the circulation pump 21 and the air is sent to the pressurized container 30 by a water flow by driving the circulation pump 21.

  Further, in the above embodiment, the air introduction valve 38 that introduces dissolved air using the negative pressure of the pump 21 is used upstream of the circulation pump 21, but the upstream side of the pressurization container 30 (the front and rear of the circulation pump 21 are connected). For example, an air pump capable of producing an air pressure exceeding the discharge pressure (positive pressure) of the circulation pump 21 may be provided, and dissolved air may be introduced by the air pump. An air introduction unit may be provided directly so that air can be introduced into the pressurized container 30.

  Furthermore, in the bath apparatus of the above-described embodiment, the fine bubble ejection device is provided at, for example, the connection portion between the bathtub 26 and the recirculation circuit 25 in the bath device illustrated in FIG. In the apparatus with a bubble generation function, a fine bubble ejection device may be provided in the outlet side pipeline connected to the outlet side of the pressurized container 30.

  Furthermore, the apparatus with a fine bubble generating function of the present invention connects an inlet side pipe 111 for introducing water into the pressurized container 30 to the water supply source 110 as shown in FIG. The outlet side passage 112 to be led out may be connected to the water tank 113, and an apparatus having a system configuration in which the air inlet valve 38 and the pump 114 are provided in the inlet side pipe 111 may be used.

  Also in this case, the pump 114 sends water to the pressurized container 30 side when the air introduction valve 38 is closed, and introduces water and the air introduction valve 38 from the outside to the inlet side pipe 111 when the air introduction valve 38 is opened. The air to be sent is sent to the pressurized container 30 side. Microbubbles have the property of giving buoyancy when adhering to cyanobacteria or red tides (plankton), and as shown in the figure, by applying a castle moat, a shrine pond, etc. Cyanobacteria and red tide can be separated into the water surface by buoyancy, and can be collected in advance, and it is possible to satisfactorily remove cyanobacteria (for example, blue seaweed) in the aquarium 113 and remove red tide on the sea. In addition, in this application, the place which generate | occur | produces a microbubble is also included in the case of the sea, a pond, etc., and the water tank to which the apparatus with a microbubble generation function is connected is wide including a sea, a pond, etc. Used in meaning.

  Furthermore, in the application example and the development example of the embodiment, the water inlet 32 of the pressurized container 30 is formed downward. However, for example, as shown in FIG. 35, the water inlet 32 may be formed upward. The angle is set as appropriate.

  In addition, the material of the pressurized container 30 applied to the apparatus with a fine bubble generating function of the present invention is preferably a material having low water resistance, but may be PPS (polyphenylene sulfide) or the like other than polycarbonate, There is no need to finish the inside of the mirror, and the finish should be commensurate with the pump capacity. In other words, the pump capacity may be lowered by coating the inner surface with a fluorine coat or a hydrophobic ceramic coat.

  As described above, in a general water jump phenomenon classification such as a river, the fluid number at the boundary between the wave jump water and the weak water jump water is 1.7, whereas the pressure vessel 30 In the case of the shape, the fluid number at the boundary between the wave jump water and the weak water jump is basically the fluid number 2.3, but the value is the pressure tank shape, material, inner surface treatment, pressure vessel 30 Since the value changes depending on the ambient temperature, water temperature, presence / absence of bathing agent, atmospheric pressure, and the like, when the mode switching control means 40 switches between the undissolved air layer formation mode and the air layer non-formation mode, the changed value is used. It is preferable to perform control so that the mode is switched with a value according to the usage environment.

  Furthermore, in the apparatus with a fine bubble generating function of the present invention, when the pressurized container 30 to be applied is increased in size, for example, as shown in FIG. In this embodiment, the attached surface forming plate 134 is provided in a straight standing direction (extending in the vertical direction), and the attached surface forming plate 134 is used as the attached surface (the inner wall of the tank in the above embodiment). It can be efficiently increased in size by substituting the surface. In this case, as shown in FIG. 36A, for example, the partition plate 34 is provided with a substantially rectangular (for example, diamond-shaped) through-hole 140 as a water passage portion through which water flows from the top to the bottom of the partition plate 34. A plurality of attached surface forming plates 134 that are formed at a distance from each other and are disposed in the formation region of the substantially rectangular through-hole 140 align the upper end portion thereof with the diagonal line of the rectangular through-hole 140.

  Then, water poured from the inlet 32 of the tank 31 of the pressurized container 30 passes through the through-hole 140 and then falls to the lower side of the tank 31 along the surface to be added of the surface to be added 134 and is stirred. By being stored, undissolved air in the tank 31 is dissolved in the water, and the tank 31 is located between the water surface stored below the partition plate 34 and the lower surface of the partition plate 34. An air layer of undissolved air is formed.

  In this manner, the notch K having a triangular shape is formed in the partition plate 34 in the pressurized container 30 according to the application example of the embodiment, and the water flow passing through the notch K causes the bottom of the triangle to be the inner wall surface of the tank 31. As shown in FIG. 36 (a), the water flow that has passed through the substantially rectangular through-hole 140 is divided by its diagonal lines to form a triangular shape. , The bottom side of the surface of the attached surface forming plate 134 is made to flow down, and the other triangular water flow is the other side of the partition plate 134 (the opposite of the surface to which the one of the triangular water flows is added). It flows down along the side surface.

  Instead of fixing the partition plate 34 to the tank 31, if the partition plate 34 is fixed to the target surface forming plate 134 with pins 141 or the like as shown in FIG. The relative position with respect to the surface forming plate 134 can be stably maintained, and the rhombic through-holes 140 formed in the partition plate 34 can be prevented from shifting.

  Further, in this example, for example, electrodes 35 and 36 are provided as water level detection means for detecting the water level below the partition plate 34 and judging the size of the air layer. In this case, the electrodes 35 and 36 are preferably attached from the side direction as shown in FIG.

  Further, a substantially triangular through hole 140 is formed in the partition plate 34, and a supported surface forming plate 134 extending in the vertical direction of the tank 31 is arranged in the tank 31 on the lower side of the formation region of the through hole 140. The attached surface forming plate 134 may have a top end aligned with one side of the substantially triangular through hole. In this case, a plurality of triangular through holes 140 are formed in one large partition plate 34 and, for example, a plurality of adherend surface forming plates 134 are fixed to the lower side of the formation region of the through holes 140. However, it is difficult to fix the adherend surface forming plate 134 along the side of the triangular hole provided in the partition plate 34, and the side of the through hole 140 and the adherend surface forming plate 134 can only be brought close to each other. there is a possibility. However, even in that case, the water flow that has exited the through hole 140 is attracted to the adherend surface forming plate 134 that is close to one side of the through hole 140, so that substantially the same effect can be achieved.

  Further, as shown in the figure, each of the plurality of adherend surface forming plates 134 is extended in the vertical direction and arranged at intervals from each other, and is divided for each of the divided regions divided by the plurality of adherend surface forming plates 134. As shown in FIG. 36 (b), a partition plate 34 may be provided. In this case, as shown in FIG. 36 (c), the water passage portion is formed by a plurality of substantially triangular notches K formed at intervals on the outer edge of the partition plate 34, and each notch K is a partition. The plate 34 is provided in such a manner that the diameter in the edge extending direction decreases toward the center of the partition plate 34. Further, the opening of the notch K is close to the adherend surface forming plate 134, and the water passing through the notch K falls to the lower side of the tank 31 along the adherend surface of the noble surface forming plate 134 and is stirred. It is configured to be stored while being.

  In the configuration in which the attached surface forming plate 134 including the configuration shown in FIG. 36 is provided, the attached surface forming plate 134 is not partitioned above the tank 31 (disposed on the lower side of the partition plate 34). As described above, it is preferable that the water containing the air poured from the inlet 32 is evenly distributed to each part of the added surface forming plate 134. In this way, it is not necessary to provide the same number of injection ports 32 as the plurality of partition plates 34. In addition, the adherend surface forming plate 134 is formed so as not to partition to the lower end of the tank 31, or, as shown in FIG. Since the internal pressure between the surface forming plates 134 can be made uniform, there is no need to provide a plurality of water level detecting means for detecting the water level of the stored water in the pressurized container 30. In addition, such a large-sized thing is used for the apparatus which generates a fine bubble in a pool etc., for example.

On the contrary, the pressurized container 30 is replaced with a small dog bath (a dog bath that removes shampoo and smells of dogs without a shampoo) or a fish tank (for example, 20 to 30 liters) instead of the bathtub 26 where a person bathes. It can also be applied to generate fine bubbles. In that case, for example, it is conceivable that the tank inner diameter of the pressurized container 30 is Φ22.5 mm, and four notches K are provided to give a total area of 14 mm ^{2. In} this case, the distance between the notches is at the bottom. Compared to 405% (4.05 times), pump control for mode switching (recovering mode switching by itself, for example, when the flow rate is reduced by 0.2 liters per minute, for example, due to filter clogging) Since it becomes difficult to control the pump, it is considered preferable to form the size of the pressurized container 30 so that the distance between the notches is about 400% (4 times) with respect to the bottom.

  Furthermore, in the said Example, the diameter of the tank 31 of the pressurized container 30 to be applied is made into internal diameter (PHI) 4.5cm, the to-be-attached surface of the inner wall of the tank 31 is made into the curved surface which draws a loose circular arc, and the structure shown in FIG. In this example, the surface to be attached 134 is provided so as not to be partitioned above the tank 31 and the surface to be attached is a flat surface. However, in the configuration in which the water flow flows down along the surface to be attached, the surface to be attached is gentle. It is not limited to an arcuate curved surface or plane, and may be a curved surface having a small radius of curvature (more curved), or shown in FIGS. 37 (n), (0), (p), and (q). It is good also as a bending surface which has the bending part which becomes convex on the outer side of the shape like the base part B. Note that it is preferable that the water flow passing through the water passage portion flows down along the surface to be added in various substantially triangular shapes as shown in FIG. 37, for example.

  Furthermore, in the pressurized container 30 applied to the apparatus with the function of generating fine bubbles of the present invention, a cylinder made of vinyl chloride or the like is provided in a container (tank) 31 such as a drum can as shown in FIG. For example, as shown in FIG. 38A, the inner wall surface of the pipe 136 is used as the attached surface (the cylindrical wall of the pipe 136 is used as the curved attached surface forming plate), and the dots shown in FIG. As shown, a filling adhesive such as silicon sealant is provided in the gap between the pipes 136 to fill the gap and fix the pipes 136, and a plurality of hexagonal through holes 140 are formed on the pipe 136. The partition plate 34 may be placed, and the water flow exiting the hexagonal through hole 140 may have a substantially triangular cross section and flow down the surface to be attached. In FIGS. 38A to 38C, the partition plate 34 is shown through (in a state where a transparent partition plate 34 is provided).

  Further, in the pressurized container 30 applied to the apparatus with the function of generating fine bubbles according to the present invention, the through holes and notches in the water passage portion do not need to have the same shape and size. For example, as shown in FIG. In addition, two types of large and small through holes 140 (140a and 140b) can be formed, and two types of large and small water flows having a substantially triangular cross section can be formed. If it does in this way, since the one where the cross-sectional area of a water flow is large, the flow velocity from which a water flow reaches the water surface of stored water is quick, it can control as follows.

  For example, first, a mode in which the undissolved air layer A is formed by reducing (decreasing) the number of revolutions of the pump 21 (a zone in which the amount of undissolved air can be measured and causing vibration jumping, for example) is gradually obtained. As the air layer is not formed (undissolved air quantity cannot be measured), the water flow having a substantially triangular cross section enters the zone where steady water jumping occurs (the smaller cross section). The generally triangular water flow generates light turbidity (in the zone of vibrational jumping). Here, when the rotational speed of the pump 21 is further increased, the water flow having a substantially triangular cross section becomes steady jumping in both large and small, and when the rotational speed of the pump 21 is further increased, the water flow having a substantially triangular cross section becomes a strong water jumping constant. However, the smaller cross-section water flow is a steady jump. Further, when the rotational speed of the pump 21 is further increased, the turbidity can be controlled in multiple steps by changing the rotational speed of the pump so that the water flow having a substantially triangular cross section becomes a strong jumping water both large and small. .

  Furthermore, in the pressurized container 30 applied to the apparatus with a fine bubble generating function of the present invention, for example, as shown in FIG. 38 (c), even though the size and shape of the through hole 140 of the water passage portion are the same, Two different types of water streams can be formed depending on the arrangement mode of the surface to be added (here, the mode of arrangement of the surface to be added 134). In this example, the water flow exiting the hexagonal through hole 140 is divided into two to form a water flow with a large cross-sectional area, and divided into three to form a water flow with a small cross-sectional area. The mode of forming different types of water flow is not particularly limited, and is set as appropriate. A notch may be used instead of the through-hole 140, and a member forming the surface to be added is also appropriately selected. Is set.

  Furthermore, in the pressurized container 30 applied to the apparatus with the function of generating fine bubbles according to the present invention, as shown in FIGS. 38 (d) and 38 (e), even when the through hole 140 is substantially triangular, Depending on the arrangement form of 134, the water flow passing through one through-hole 140 can be made to exit the through-hole 140 as a plurality of water flows having a substantially triangular cross section. FIG. 38 (d) shows an example of an embodiment in which the water flow comes out with the same shape and the same size water flow, and FIG. 38 (e) shows that the water flow has a different shape and a different size water flow. The example of the mode which comes out is shown.

  In addition, in the pressurized container applied to the apparatus with a fine bubble generating function of the present invention, the total area of the water passage portion formed in the partition plate corresponds to the total area of the notches and through holes formed in the partition plate. Depending on the manner of arrangement of the surface to be adhered, the total area of the notch K and the through hole 140 is almost the same as in the application example of the example and the example of FIG. 36, and FIG. As in the example shown in b), if water is not allowed to pass through a part of the notch and the through hole, the total area of the notch and the through hole is reduced by the amount that does not pass.

  Further, in the pressurized container 30 applied to the apparatus with the function of generating fine bubbles according to the present invention, the water level in the pressurized container 30 may be detected by a photoelectric method, a float method, etc. instead of the electrodes 35, 36, 137. Absent.

  Further, after the pump is moved at a rotation speed of 5 liters / minute of water, the rotation of the pump is gradually increased, and the water level in the pressurized container 30 is detected by the electrodes 35, 36, and 137, and there is no air layer. When measuring the number of revolutions when it becomes, there may be a considerably high number of revolutions. In other words, when the filter is clogged, the flow rate does not flow even if the rotational speed is increased, so that the flow rate does not reach the boundary between the vibration jump and the steady jump. That is, instead of switching the air introduction valve control method in anticipation of clogging of the filter 54 due to power consumption, the air introduction valve control method is turned off by the water level detection operation in the pressurized container 30 by the electrodes 35, 36, and 137. You may change it.

  Furthermore, in the pressurized container 30 of the application example of the above embodiment, there was an air layer (undissolved air layer A) boundary between vibration jumping and steady jumping, but if the container is made smaller, crushing weak jumping water and It is considered that the boundary with or without an air layer moves between vibration jumps, and if the container is enlarged, the boundary with or without an air layer moves between steady jumps and strong jumps. Therefore, depending on the size of the pressurized container 30, etc., a boundary with or without an air layer is controlled using one of the boundaries of weak and vibration jumps, vibration and steady jumps, and steady and strong jumps. It doesn't matter.

  Furthermore, as shown in FIG. 45 (a), in the pressurized container 30 of the second development example, a rod-like shape extends from the lower end of the through hole 29 formed in the partition plate 34 to the water surface stored in the lower portion of the tank 31. It is also possible to provide a flow-down feeding rod 66 and cause water to flow along the flow-down feeding rod 66. Further, as shown in FIG. 45 (b), the table plate portion 28 may be formed not at the center of the partition plate 34 but at a position shifted from the center, and further, as shown in FIG. 45 (b). Although the follow-up stick 66 may be provided, the flow-down follow-up stick 66 may be omitted.

  Further, as shown in FIGS. 46A and 46B, in the pressurized container 30 applied to the present invention, a gap for allowing water to flow downward from above the partition plate 34 is provided in the vicinity of the outer periphery of the partition plate 34. As shown in FIG. 46 (a), the water passing through the through hole 29 flows through the air layer A and then flows down along the surface to be added on the inner peripheral wall of the tank. As shown in FIG. 46 (b), after the water passing through the through hole 29 passes through the air layer A and passes along the plate portion 73, the water is applied to the surface to be added to the inner peripheral wall of the tank. You may comprise so that it may flow along.

  Further, the pressurized container 30 of the application example and development example described above has a shape that is advantageous for the pressure applied to the tank wall from the inside of the tank by making the tank shape into a substantially spherical shape (elliptical sphere shape). A partition plate 34 is provided, and the water flow is enlarged above the partition plate 34 (the upper space of water) to form an expansion / contraction space that reduces the water flow in the gap, and pressurization is performed by integrating the space with the air layer A and the stored water. Although the container 30 is downsized, it may have a cross-sectional configuration as shown in FIG.

The configuration shown in the figure is formed by providing an injection pipe 78 for injecting water into the tank 31, and an enlarged diameter portion 79 of a pipe line is formed on the upstream side of the injection pipe 78. A target member 67 is provided. Further, in the injection pipe 78, the region inserted into the tank 31 has a horizontal width as it goes to the distal end side as shown in the perspective view of FIG. 47B and the plan view of FIG. 47D. In addition to being formed widely, the vertical interval is narrow, and the pipe is squeezed up and down. As shown in FIG. 47 (c), the tip of the injection tube 78 has an inverted saddle shape, and gaps S with a uniform interval are formed. In this example, the region for expanding the water flow (the enlarged diameter portion 79), the gap forming region for reducing the water flow (the tip side of the injection pipe 78 in the figure), and the water storage region (tank 31) are separated. In this example, the total area of the gap S is formed larger than the area of the injection port 32 (for example, 50 mm ² ).

  The present invention can make hot water or water in a water tank such as a bathtub or a pool cloudy and comfortable, or can easily remove algae, etc., so that it can be used for household or commercial bath devices, pools, ponds, etc. It can be applied as a device with various fine bubble generating functions for generating fine bubbles.

DESCRIPTION OF SYMBOLS 1 Bath remote control apparatus 3 Control apparatus 15 Reheating heat exchanger 16 Reheating burner 21 Circulation pump 25 Reheating circulation path 26 Bathtub 30 Pressure vessel 31 Tank 32 Inlet 33 Outlet 34 Partition plate 35, 36 Electrode 38 Air introduction valve DESCRIPTION OF SYMBOLS 39 Fine bubble ejection apparatus 41 Pump drive control means 42 Air introduction valve opening / closing control means 43 Fine bubble generation operation part 44 Repulse operation command operation part 100 Upper space 134 Substrate surface forming plate 140 Through hole K Notch

Claims (5)

A pressurized container into which water or water containing air is introduced under pressure, the pressurized container storing a tank while stirring the water introduced into the pressurized container, a water inlet and water and a outlet, the the inlet side of the water to the pressure vessel is connected input side conduit connected to the bathtub, said guide outlet side of the pressure vessel of water connected to the bath tub The outlet side pipe line is connected to the inlet side pipe, and the inlet side pipe line is provided with an air introduction valve and a pump, and the pump is connected to the bathtub from the bathtub when the air introduction valve is closed . bath water entering-side conduit of the feed to the pressurized vessel side through, in the open state of the air inlet valve and air introduced into the entering-side conduit from the outside through the air inlet valve and the bath water by the have the configuration to be sent to the pressure vessel side, storing with stirring bath water introduced into the pressurized vessel within said tank, The non dissolved air which could not be dissolved with is dissolved at least one of the air sent from the pump to non dissolved air in the tank to the pressure vessel to the bath water in the tank to separate the bath water in the tank Te to form an air layer of yet-dissolved air in the tank, from the water outlet and forms a structure which does not derive the air in the non-dissolved derive only bath water was dissolved air, the A reheating heat exchanger for reheating the bath water is interposed in the outlet side pipe, and has a reheating heat exchanger, the outlet side line, and the inlet side line. A circulation path is formed, and by driving the pump, the bath water is sequentially passed through the inlet side pipe, the pressurized container, and the outlet side pipe and returned to the bathtub to be circulated in the reheating circulation path. It has the function, the said exit-side conduit or said output side conduit bath And the connecting portion, fine bubbles of water within the bath tub by jetting the pressurized container the bath water air is dissolved by the water in the water or the bath tank in the exit-side pipe A fine bubble ejection device is provided for ejecting water, and in the fine bubble ejection device, nozzles for generating fine bubbles and water in which air circulated through the recirculation circulation path is dissolved are passed through the nozzles. A fine bubble generating flow path for generating fine bubbles in the water by being jetted into the water, a reheating flow path for leading the water in which the air is dissolved to the water without passing through the nozzle, and According to the flow rate of water introduced into the fine bubble ejection device, a flow rate corresponding on-off valve is provided that closes when the flow rate is equal to or higher than a set flow rate, and the fine bubbles are controlled by the pump during the ejection operation of the fine bubbles into the bathtub. Eruption By setting the flow rate of water introduced into the apparatus to be equal to or higher than the set flow rate, the bath water is spouted into the water through the flow path for generating fine bubbles so that the flow rate corresponding on-off valve is closed. When the reheating heat exchanger heats the water circulated through the reheating circulation path without performing the operation of injecting into the bathtub, the reheating heat exchanger introduces the fine bubble ejecting apparatus by the control of the pump. that the flow rate of the water was less than the set flow rate finely further comprising a pump drive control means for deriving the water through the flow corresponding off valve the reheating passage the bath water and opened Equipment with fine bubble generation function. A pressurized container into which water or water containing air is introduced under pressure, the pressurized container storing a tank while stirring the water introduced into the pressurized container, a water inlet and water An inlet side pipe connected to the bathtub is connected to the water inlet side of the pressurized container, and the water outlet side of the pressurized container is connected to the bathtub. The outlet side pipe line is connected, and the inlet side pipe line is provided with an air introduction valve and a pump, and the pump water from the bathtub in the closed state of the air introduction valve. Through the inlet side pipe to the pressurized container side, and in the open state of the air introduction valve, the air introduced from the outside through the air introduction valve and the bath water are introduced into the inlet side pipe. By having a configuration to send to the pressure vessel side, storing the bath water introduced into the pressure vessel while stirring in the tank, At least one of undissolved air in the tank and air sent from the pump to the pressurized container is dissolved in the bath water in the tank, and undissolved air that could not be dissolved is separated from the bath water in the tank. Forming an air layer of the undissolved air in the tank, and only the bathtub water in which air is dissolved is derived from the water outlet, and the undissolved air is not derived, A reheating heat exchanger for reheating the bath water is interposed in the outlet side pipe, and has a reheating heat exchanger, the outlet side line, and the inlet side line. A circulation path is formed, and by driving the pump, the bath water is sequentially passed through the inlet side pipe, the pressurized container, and the outlet side pipe and returned to the bathtub to be circulated in the reheating circulation path. Having the function, in the outlet side pipe or in the outlet side pipe and the bath In the connecting portion, fine bubbles are jetted into the water in the bathtub by jetting the bath water in which air is dissolved by the pressurized container into the water in the outlet side pipe or the water in the bathtub. A fine bubble jetting device is provided, and in the fine bubble jetting device, a nozzle for generating fine bubbles and water in which the air circulated through the recirculation circulation path is dissolved are passed through the nozzle. There are provided a fine bubble generating flow path for generating fine bubbles in the water by jetting to the water, and a reheating flow path for guiding the water in which the air is dissolved to the water without passing through the nozzle. The reheating heat exchange is performed at the same time when the reheating operation for heating the bathtub water circulating through the recirculation circulation path by the reheating heat exchanger and the operation for ejecting fine bubbles into the bathtub are performed simultaneously. The water introduced into the vessel is gas-liquid two-phase in the reheating heat exchanger and in the outlet line downstream of the reflow heat exchanger by heating by the reheating heat exchanger. The pressure of the water by the pump is increased so as not to generate a multiphase flow, and the water is ejected into the water through the fine bubble generating flow path, and the follow-up operation is performed without performing the operation of ejecting the fine bubbles into the bathtub. At the time of the single operation of the reheating operation, the pressure of the water is lowered without performing the operation of increasing the pressure of the water performed at the same time, and the water is led out to the water through the reflow channel. A device with a function of generating fine bubbles. The function of the single operation of fine bubble ejection that performs the operation of jetting the fine bubble from the fine bubble jet device into the bathtub without heating the bathtub water circulating through the follow-up circulation path by the heat exchanger, and the fine bubble the function of reheating alone operation to the reheating of the water by jetting work is allowed to reheating heat exchanger circulating bath Sosui to Reheating circulation path without into bathtub, the reheating circulation path claim and a function of co-operation between the gas jetting operation into the bathtub of reheating operation and fine bubbles to the reheating of the water by burning heat exchanger chase by circulating bath water within 1 or claim 2 The apparatus with a microbubble generation function as described. The pressurized container is provided with a water level detecting means for detecting the level of the stored water stored in the pressurized container, and the detected water level is set based on the detection result of the water level detecting means provided in the pressurized container. When the high reference water level is exceeded, the air introduction valve is opened to introduce air into the inlet passage from the outside, and the air is sent to the pressurized container together with water by a pump to Increase the volume of the air layer of undissolved air between the upper end of the container to make the water level of the stored water below the set high reference water level, and close the air introduction valve when the detected water level is lower than the set low reference water level. Then, water is sent to the pressurized container by the pump, and the volume of the air layer is reduced by dissolving the air in the air layer of the undissolved air in the water to set the water level of the stored water above the low reference water level To make the air Fine bubble generating function according to any one of claims 1 to 3, characterized in that it has an air inlet valve opening and closing control means for opening and closing control of Iriben. A remote control device is signal-connected to the device with the fine bubble generation function, and the remote control device is provided with a fine bubble generation operation unit for turning on and off the fine bubble ejection operation of the device with the fine bubble generation function. The apparatus with a fine bubble generating function according to any one of claims 1 to 4 .

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