JP5865681B2 - 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 generating device that generates bubbles in the bath water is used. Among them, by discharging very fine bubbles from the bubble generating device into the bathtub hot 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 a function of generating fine bubbles and a reheating operation of bath water. In addition, the fine bubble generation function circuit is provided with a pressurized container for pressurizing and dissolving air in hot water (tub water) passing through the fine bubble generation function 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. 44A, 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. However, if the pressurized container is downsized to reduce the size and cost of a bath apparatus having a function of generating fine bubbles, it is injected into the tank 31 as shown in FIG. 44 (b). 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. A water inlet and a water outlet, and a water inlet to the pressurized vessel is connected to an inlet side pipe connected to an external water supply unit. The outlet side of the pressure vessel is configured to be connected to an outlet side pipe connected to an external water tank, and the inlet side pipe is provided with an air introduction valve and a pump, When the air introduction valve is closed, the pump sends water to the pressurized container side, and when the air introduction valve is open, the pump supplies water and air introduced from the outside to the inlet side pipe through the air introduction valve. It has a configuration to send to the pressurized container side, and at least the air sent from the pump to the pressurized container and the undissolved air in the pressurized container One was separated and the water in the non-dissolved air the pressurized vessel which has not been dissolved in the water in the pressurized vessel with is dissolved in the water in the pressurized vessel wherein the air layer of the yet-dissolved air the function of the non-dissolved air layer formation mode for forming in the tank, the function of the pressure vessel wherein the air layer air layer of non-dissolved air is vigorously stirred water enough in the tank is not formed in the tank non-forming mode of And a mode switching control means for controlling switching between the air layer non-forming mode and the undissolved air layer forming mode by controlling the number of revolutions of the pump, and the outlet side pipe or the outlet side pipe road and fine bubbles to the water in the water or in the I Ri before Symbol aquarium that is ejected into the water in the water tank of the outlet side pipe passage of water which the air is dissolved is provided in the connection portion between the water tank It has a fine bubble ejection apparatus for ejecting, before The pressurized container is provided with a partition plate that vertically partitions the inside of the tank with a gap below the inlet for injecting water into the tank, and water is provided on the partition plate from above to below. A water passage section is formed, and the water passing through the water passage section flows down to the lower side of the tank along the surface to which water is added. The upstream side which is the fluid number of spray water passing through the water passage according to the flow rate of water introduced into the pressure vessel and the total area of the water passage formed in the partition plate in the pressure vessel It is assumed that the value of the fluid number changes, and the mode switching control means sets the upstream fluid number value of the pressurized container to a value smaller than the boundary fluid number serving as the boundary of the jumping phenomenon classification. The air layer formation mode is set, and the value of the upstream fluid number is the boundary. And a means for solving the problems with the configuration you and the air layer non-forming mode by a value of more than Froude number.

Furthermore, the second invention has a tank constituting a pressurized container into which water or water containing air is introduced under pressure, and the tank stores the water introduced into the tank while stirring. And an inlet side pipe connected to an external water supply unit is connected to the water introduction side to the tank, and the leading end side of the inlet side pipe is inserted into the tank to be placed in the tank. A water outlet is formed on the water outlet side of the tank, and an outlet side pipe connected to an external water tank is connected to the outlet. The inlet side pipe is provided with an air introduction valve and a pump. The pump sends water to the tank side when the air introduction valve is closed, and water and the pump when the air introduction valve is open. The air introduced from the outside to the inlet side pipe through the air introduction valve is sent to the tank side, At least one of air sent from the tank to the tank and undissolved air in the tank is dissolved in the water in the tank, and undissolved air that could not be dissolved in the water in the tank is dissolved in water in the tank. The function of the undissolved air layer forming mode in which the air layer of the undissolved air is separated and formed in the tank, and the air in which the water in the tank is vigorously stirred so that the air layer of the undissolved air is not formed in the tank A mode switching control unit that has a function of a non-layer formation mode and controls the switching between the air layer non-formation mode and the undissolved air layer formation mode by controlling the rotational speed of the pump; In the water tank, the water dissolved in the outlet pipe line or in the water tank is ejected into the water or the water in the water tank provided in a connecting portion between the outlet pipe and the water tank. water Has a fine bubble ejection device for ejecting micro-bubbles, the water passing portion passing through the water introduced into the tank through the infusion pipe to the tip end of the injection tube is formed, the water passing portion The passing water flows down to the lower side of the tank along the surface to which water is added, the capacity of the tank constituting the pressurized container, the flow rate of water introduced into the tank , and the front the value of the upstream Froude number is a number of Froude running water elevation through the water passing portion is assumed to vary according to the total area of Kisui passage portion, the mode switching control means, the upstream Froude number of the tank said air by the value of the said non-dissolved air layer forming mode by the boundary Froude number is less than value at the boundary of the hydraulic jump phenomenon classification, the value of the number of upstream Froude to a value equal to or greater than the number of the boundary Froude Layer non-formation mode configuration Has it are a means to solve the problems.

Further, in the third invention, in addition to the structure of the first or second invention, the mode switching control means changes the value of the upstream fluid number by changing the flow rate of water introduced into the pressurized container. It is characterized by making it.

Furthermore, in the fourth aspect of the invention, in addition to the configuration of the third aspect of the invention, the boundary fluid number of the jumping phenomenon classification is given in advance as the initial fluid number, and an air layer of undissolved air in the tank of the pressurized container A provisional fluid number corresponding to the boundary flow rate is obtained by obtaining a flow rate of water at a boundary between a flow rate of water formed and a flow rate of water in which the air layer of the undissolved air is not formed in the tank; detecting a displacement amount with respect to the initial Froude number number has a learning mode control means for detecting the number of target Froude based on the shift amount, mode switching control means upstream Froude number of values the learning mode control means By controlling the flow rate of water introduced into the pressurized container so that it is smaller than the target fluid number obtained by Characterized by an air layer non-forming mode by controlling the flow rate of the water introduced into the pressurized vessel so that the target Froude number or more.

  Furthermore, in the fifth aspect of the invention, in addition to the configuration of the third or fourth aspect of the invention, the mode switching control means has a pump rotational speed smaller than a preset rotational speed in the undissolved air layer formation mode. The mode switching control is performed by changing the flow rate of water introduced into the pressurized container by driving at the rotation speed and driving the rotation speed of the pump at the set rotation speed or higher in the air layer non-forming mode. Features.

Furthermore, the sixth aspect of the invention is the water level detection for detecting the water level of the stored hot water stored in the tank of the pressurization container in the pressurization container in addition to the configuration of any one of the first to fifth 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 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 to the pressurized container together with water by a pump. When 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 of the undissolved air is supplied to the water. By dissolving the air in the bed And having an air introduction valve closing control means for opening and closing control of the air inlet valve to the set water level of the stored water above the low reference level to reduce the volume of the air layer.

  Furthermore, in the seventh invention, in addition to the configuration of any one of the first to sixth inventions, the water tank is a bathtub, and an inlet side pipe line is connected to the bathtub so that the bathtub is a water supply unit. The outlet side pipe is provided with a reheating heat exchanger for reheating the bath water, and has the reheating heat exchanger, the outlet side line, and the inlet side line. A recirculation circuit is formed, and the pump water drives the bath water through the inlet side, the pressurized container, and the outlet side in order to return to the bathtub, and circulates in the reheating circuit. It is characterized by being a bath apparatus having a function to make it.

Furthermore, in an eighth aspect of the invention, in addition to the configuration of the seventh aspect of the invention, the fine bubble ejection device causes the fine bubbles to be generated in the water by ejecting water circulated through the recirculation circulation path into the water through the nozzle. A flow path for generating fine bubbles, a flow path for replenishing the water into the water without passing through the nozzle, and a flow rate equal to or higher than a set flow rate according to a flow rate of water introduced into the fine bubble ejection device. Close the flow rate corresponding opening closing is provided when, said flow corresponding opening closed by the flow rate of the water introduced into the micro-bubble jetting device under the control of the pump when fine bubbles jetting operation than the set flow rate The water is jetted into the water through the fine bubble generating channel so as to be closed, and the flow rate of water introduced into the fine bubble jetting device is controlled by the pump during the reheating operation. Characterized in that it has a pump drive control means for deriving the water through the flow corresponding opening closed the reheating passage the water and opened to the full.

  Furthermore, the ninth aspect of the invention is the function of the fine bubble generating operation for injecting fine bubbles into the water from the fine bubble jetting device, in addition to the configuration of the seventh or eighth invention, and a bathtub in the recirculation circulation path. A function of reheating the hot water by circulating the hot water and reheating the hot water, and a function of simultaneous operation of generating and regenerating the fine bubbles for reheating and heating the hot water in the bathtub at the time of generating the fine bubbles It is characterized by having.

  Furthermore, in a tenth aspect of the invention, in addition to the configuration of any one of the first to ninth aspects, a remote control device is signal-connected to the device with a 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 function of non-air layer formation mode in which the remaining undissolved air is dissolved in the water in the tank by the pressurized container, but the water in the tank is vigorously stirred so that the air layer of undissolved air is not formed in the tank of the pressurized container And a function of an undissolved air layer formation mode in which the pump is driven at a rotational speed smaller than the set rotational speed to form an undissolved air layer in the tank of the pressurized container. The switching is appropriately controlled by the mode switching control means. It is possible.

  Therefore, during the operation of the air layer non-formation mode function, the water in the pressurized container can be vigorously stirred to increase the amount of dissolved air in the bathtub water in the pressurized container, and the generated fine bubble concentration can be increased, Moreover, since the size of the undissolved air layer formed during the operation of the function of the undissolved air layer formation mode can be appropriately detected by providing a water level detecting means in the pressurized container, for example, the amount of air dissolved in the water It is easy to measure, and 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 can be generated satisfactorily.

In the present invention, the pressurized container is provided with a partition plate that vertically partitions the inside of the tank through a gap below the inlet for injecting water into the tank, so that the water drops on the upper side of the partition plate. To do. Then, water passes through the water passage portion formed in the partition plate from the top to the bottom, flows down to the lower side of the tank along the surface to which the water is added, and is stored while being agitated. Undissolved air in the tank is dissolved in water, and an air layer of undissolved air in the tank is formed between the water surface stored below the partition plate and the lower surface of the partition plate. Is done. In the configuration in which the inlet side pipe is connected to the water introduction side to the tank constituting the pressurized container and the tip side is inserted into the tank as the water injection pipe, the water at the tip side of the injection pipe is inserted. When the water that has passed through the passage flows into the tank and is stored while being stirred, when the undissolved air in the tank is dissolved in the water, an air layer of undissolved air is formed in the co-tank. Is done .

When stirring of water in the pressurized container is insufficient and the air cannot be sufficiently dissolved in the water, when the water in which the air is dissolved in the pressurized container is ejected to a water tank such as a bathtub, the above-mentioned It is difficult to generate fine bubbles from water well, and the turbidity of the bath water is reduced, but the capacity of the pressurized container, the flow rate of water introduced into the pressurized container, Depending on the total area of the water passage portion formed on the partition plate (in the configuration in which the water injection pipe is inserted into the tank constituting the pressurized container and the water flows down, the capacity of the tank and the tank Jumps the value of the upstream fluid number, which is the fluid number of the flowing water passing through the water passage part, which changes according to the flow rate of water introduced into the water pipe and the total area of the water passage part on the tip side of the injection pipe ( (hydraulic jump) The boundary fluid number that is the boundary of the phenomenon classification By setting the value to the non-air layer formation mode, it is possible to dissolve the air more efficiently by causing a (more intense) water jump phenomenon in which the air is more easily dissolved in the undissolved air layer formation mode. Can do. Further, by setting the value of the upstream fluid number to a value smaller than the boundary fluid number, the undissolved air layer formation mode can be appropriately formed in the undissolved air layer formation mode.

  Furthermore, the mode switching control means can easily and accurately change the upstream fluid number by changing the value of the upstream fluid number by changing the flow rate of water introduced into the pressurized container, An undissolved air layer can be appropriately formed in the undissolved air layer formation mode, and air can be dissolved more efficiently in the air layer non-formation mode.

  Further, a learning mode is provided in which the boundary fluid number of the jumping phenomenon classification is given in advance as the initial fluid number, and the target fluid number is detected based on the initial fluid number and the actual flow rate of the undissolved air layer that can and cannot be measured. By providing a control means, even if the boundary flow rate actually changes due to various conditions such as the water temperature and the presence or absence of bathing agents, the pump rotation speed increases due to filter clogging, and the flow rate is compared with the flow rate expected from the rotation speed. Thus, even if the actual flow rate is small and the boundary flow rate has not actually changed, it is possible to obtain an appropriate target fluid number in accordance with the situation in any case. Therefore, based on the appropriate target fluid number obtained by the learning mode control means, the mode switching control means can control switching between the undissolved air layer formation mode and the air layer non-formation mode, and very appropriate mode switching control. The fine bubbles can be generated satisfactorily.

  Further, when the mode switching control means is in the undissolved air layer forming mode, the pump rotational speed is driven at a rotational speed smaller than a preset rotational speed, and in the air layer non-forming mode, the pump rotational speed is By changing the flow rate of water introduced into the pressurized container by driving at a set rotational speed or more, and performing the mode switching control, the flow rate of water introduced into the pressurized container is easily changed, and the upstream side The fluid number can be changed to appropriately form an undissolved air layer in the undissolved air layer formation mode, and air can be dissolved more efficiently in the air layer non-formation mode.

  Further, based on the detection result of the water level detecting means provided in the pressurized container provided in the present invention, when the water level exceeds the set high reference water level, the air introduction valve is opened and air is introduced into the inlet side passage from the outside. The volume of undissolved air in the air layer is increased by sending the air to the pressurized container together with the bath water using a pump, and the water level of the stored water is set to a set high reference water level or lower, and the detected water level is set. When the level becomes lower than the low reference water level, the volume of the undissolved air layer is closed by closing the air introduction valve, sending water to the pressurized container by the pump, and dissolving the air of the undissolved air in the water. By reducing the water level and setting the water level above the set low reference water level, the amount (volume) of the undissolved air layer in the pressurized container can always be made appropriate, and the additional dissolved rate of air in the pressurized container can be increased. Properly at That.

  Furthermore, in the present invention, water or water and air are added by a pump by using a water tank and a water supply section as a bathtub, and a bath apparatus in which the pressurized container of the present invention is provided in a recirculation circuit connected to the bathtub. As a configuration to send to the pressure vessel, good fine bubbles can be generated in the bathtub. The structure can be simplified, the size of the bath equipment with the function of generating microbubbles can be reduced, and the price can be reduced. In addition to the single operation, it is also possible to select the simultaneous operation of the fine bubble generation operation and the reheating operation. In addition, since the fine bubbles as described above can be generated in the bathtub, an excellent bath apparatus that can be used very comfortably can be realized.

  Furthermore, the present invention is applied to a bath device, and the flow rate is set according to the flow rate of the fine bubble generating device, the flow channel for generating fine bubbles, the flow channel for reheating, and the hot water introduced into the fine bubble jet device. By providing the flow rate corresponding on-off valve that closes at the above time and the pump drive control means that adjusts the flow rate of the hot water by driving the pump, the following operations can be performed.

  That is, at the time of the fine bubble ejection operation, the flow rate of the water introduced into the fine bubble ejection device is made higher than the set flow rate by increasing the number of revolutions of the pump so that the flow rate corresponding on-off valve is closed. Corresponding to the flow rate by jetting into the water through the flow path for generating fine bubbles and lowering the flow rate of water introduced into the fine bubble jetting device by lowering the number of revolutions of the pump during the chase operation With the open / close valve open, the hot water can be led into the water through the reheating channel. 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, for example, by using a device with a function of generating fine bubbles as a bath device or a pool device, a comfortable bathing time or pool bathing time can be realized 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 of the fine bubble generation function in the bath apparatus of an 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 jumping phenomenon classification | category according to the upstream fluid number. Schematic diagram (a) showing a general water jump classification shape of a river based on the water jump phenomenon classification shown in FIG. 20, an explanatory diagram (b) for considering the water jump classification shape of the embodiment, and an enlargement in the frame V It is a figure (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 typical explanatory drawing for demonstrating the structure and problem of a pressurized container proposed conventionally. 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 the further another example of the pressurized container applied to the apparatus with a fine bubble generation function of this invention. It is explanatory drawing which shows typically the structure of another example of the pressurized container applied to the apparatus with a fine bubble generation function of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment (the embodiment of the present application), 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 on the upper side, and the reheating heat exchanger 15 (15a, 15b) for reheating the bath water is provided on the upper side of 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 hot water in the bathtub, 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, so 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, bathtub hot 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, the air introduced from the outside via the air introduction valve 38 is pressurized and dissolved in water (in this case, bathtub hot water), discharged, and introduced into the pressurized container 30 under pressure.

  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 hot water circulation can be performed by the single circulation pump 21, the apparatus configuration can be simplified as compared with the configuration in which two pumps, a hot water circulation pump and an air dissolution pump, are provided. It is possible to reduce the size and cost of a bath device that is a device with a function of generating fine bubbles.

  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 bathtub hot 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 bathtub hot water. Let The bathtub 26 and the connecting part of the recirculation circuit 25 are provided with a fine bubble jetting device 39 for jetting fine bubbles into the hot water in the bathtub 26 by jetting the hot 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 hot 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 hot water sucked by the circulation pump 21, the air is dissolved by the driving of the circulation pump 21, but this is not sufficient, and undissolved air is contained in the hot water in the form of bubbles. When the hot water in this state is introduced into the copper reheating heat exchanger 15, rust (gas-liquid two-phase flow accelerated corrosion described later) and cracks (gas-liquid 2 described later) occur 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 hot water (water) so that the air is sufficiently absorbed in the hot water (not yet). If this hot and cold water is introduced into the reheating heat exchanger 15 in a state that does not include dissolved air bubbles, the problem of 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. As shown in FIG. 1E, gaps S between the respective notches K and the inner wall surface of the tank are formed. 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 a fine bubble generating function such as the bath apparatus of the present embodiment that applies the pressurized container 30 to generate fine bubbles (white turbidity) in the bath water, based on the detected water level of the electrodes 35, 36, and 137, Open / close control of the air introduction 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. 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.

  Moreover, the bath apparatus of a present Example has the undissolved air layer formation mode which forms the undissolved air layer A, and the air layer non-formation mode which does not form the undissolved air layer A in the control apparatus as shown in FIG. Is provided for switching control. That is, the bath apparatus according to the present embodiment is based on the operation of forming an undissolved air layer in the undissolved air layer formation mode, but does not air layer that stirs so strongly that no undissolved air layer is formed in the pressurized container 30. It is characterized in that the jumping phenomenon classification formed in the water flow in the pressurized container 30 can be varied by appropriately switching between the air layer non-forming mode and the undissolved air layer forming mode by interweaving the operation of the forming mode. It is one.

  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 While adhering to the attached surface of the inner peripheral wall of the tank 31 (the inner wall surface of the tank side peripheral wall), the water droplets flow down in the air layer A without being scattered. In addition, the water that has passed through the notch K is caused to follow the surface to be added of the inner peripheral wall of the tank 31 so that the flow of water is reduced.

  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 liquid Slug transition of gas 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, and also the attached surface of the inner peripheral wall 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 (inner surface) is an acute angle of 90 degrees or less, The flow along the surface to be added is considered to be a jet (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 for this is that even when 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) along the surface to be added of the inner peripheral wall of the tank 31. Layer) It is for falling to the lower side of the tank while entraining the air in A. Therefore, when only the water poured from the inlet 32 is water, the air in the tank 31 is dissolved and gradually the air layer A is decreasing.

  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 (reducing) 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 31). )). 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.

  As described above, 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 water jump phenomenon during the flow of the inner peripheral wall of the tank 31 (the vortex generated when the normal flow changes from the jet flow). Because the movement-induced bulge cannot be seen, the water flow flowing down along the surface to be attached to the inner peripheral wall of the tank 31 is not a normal flow (flow velocity) regardless of whether the electromagnetic valve 65 of the air introduction valve 38 is opened or closed. Is 661 mm / second and is not smaller than the critical flow velocity 140 mm / second), as described above, it is considered to be a jet (turbulent flow) (the flow velocity is 661 mm / second and the critical flow velocity is 140 mm / second or more and is a jet). It is done.

  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 The bubbles in the vicinity of the inner peripheral wall of the tank 31 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.

  That is, in the pressurized container 30 according to the application example of the embodiment, the bubbles are generated by the water flowing down along the surface to be added of the inner peripheral wall of the tank 31 and the tank side wall is on the side (moves downward), and the lower part of the tank When the air bubbles rising from the water to the water surface collide, the speed of the water flow is reduced to become a normal flow, a water jump phenomenon occurs on the air bubbles, and a situation occurs in which the water splashes in the air layer A. It is preventing. 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 passing through the notch K and flowing along the attached surface of the inner peripheral wall of the tank 31. As shown in Fig. 4, the water flow passes through the notch K and then flows down while the triangular base is in contact with the inner wall of the tank, and its 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 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 embodiment of the present application and the third development example, the value corresponding to the Reynolds number is considered to be about 700 to 3000, for example, compared to the Reynolds number (several tens of thousands to more than tens of thousands) of the river flow. 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. It can be understood that the energy loss can be greatly suppressed if the cut-off shape of the present application, in which the formed structure has an energy loss of 3.6 times or more and does not easily collapse.

  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 foam, as shown in FIG. 44 (b).

  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 31, for example, the height h shown in FIG. 4D) is narrow. In the fine bubble ejection device for generating fine bubbles in the bathtub 26 (see FIG. 9), dust, hair, etc. that have passed through the small-diameter through-hole of the filter 54 provided in the suction portion for sucking in the bathtub hot water are visible in the gaps. Since there is a possibility of clogging, the vertical distance from the bottom (the thickness of the water flow) (here, h) with the surface to which the water flow is added 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. The device with the function of generating fine bubbles according to the present invention includes the development examples and application examples of the present invention, and the formation and non-dissolution of the undissolved air layer by switching between the undissolved air layer formation mode and the air layer non-formation mode. Various pressurized containers that allow formation can be applied.

  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 31) can be 90 mm ² . Similarly, notches 2mm only the depth of the K, by a 3 mm, to the total area of the cutout K (total area of the gap between the inner peripheral wall of the cutout K and the tank 31) and 120 mm ^2, 180 mm ² Can do.

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, the flow velocity is the fastest when the total area of the gap between the notch K and the inner peripheral wall of the tank 31 is 90 mm ^2. Under these conditions, the water flow thickness is 0.0015 m and the flow rate is about 6 liters / minute. The flow rate is 1100 mm / second, the critical flow velocity is 121 mm / second, the fluid number is 9.1 (the flow velocity is 1100 mm / second ÷ the critical flow velocity is 121 mm / second), and the fluid number / flow velocity = 9.1 / 1100 = about 0.0082. The total area of the flow velocity / gap 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 width of the bottom of the notch K (the length in the circumferential direction of the tank, see W in FIG. 4D for the pressurized container 30 of the application example of the embodiment), On the inner peripheral wall, 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, as shown in FIGS. 19 (a) and 19 (b), for example, in the pressurized container 30 of the embodiment application example, the water flows while flowing along the surface to be added of the inner peripheral wall of the tank 31. The shape 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. In other words, on the basis of this consideration, the present invention is designed to reduce the amount of water falling to the lower side of the partition plate 34 through the notch K and to the portion where the flow should not be formed. The cutout 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 passing through the notch K flows down along the surface to be added of the inner wall surface of the tank, and can satisfy the requirement (D) which is one of the requirements necessary 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 (flow velocity is limited flow or critical flow velocity). If so, it should be possible to obtain a value (ratio or magnification) for the same limit (between laminar flow and turbulent flow), but this value is different between the development example and the present invention. It is considered a thing.

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 present invention is 126 mm ² , although the same behavior is shown, The number of fluids is 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 jump shape classification for muddy river turbulent flow, which is unpressurized, open to the upper atmosphere, and in the liquid phase, and the jump by the fluid number This shows the relationship with the classification, and since the jump shape classification is a jump shape classification with a Reynolds number as high as, for example, tens of thousands, as described above, there is no involvement in the Reynolds number. On the other hand, as in the pressurized container 30 of the application example of the embodiment, the Reynolds number has a low Reynolds number of, for example, several thousand, and the jumping shape classification below the creek such as a depth of several millimeters requires a study on the Reynolds number. Conceivable.

  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 triangular bottom flows along the inner peripheral wall of the tank 31, and the thickness of the water flow along the surface to be added of the inner peripheral wall of the tank 31 is, for example, 0.002 m. If it is thin and strongly affected by the wall surface (viscous effect), it is considered that there is a specific jumping phenomenon classification.

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 application example of the embodiment, the wet side is the side of the surface that touches the surface to be added of the inner peripheral wall of the tank 31 when the water flow falls through the notch K (flows down), and has a cross-sectional area. 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 present invention including the pressurized container 30 of the embodiment application example that is considered to have a large influence of viscosity (viscosity) (when the Reynolds number is as low as several thousand, for example), for example, FIG. As shown in b), it is considered that the minimum fluid number (generally referred to as 4.5) for steady water jump is 6.2 or more, for example, 6.5. It is considered that a fluid number of 6.2 that is larger than the general minimum energy amount 4.5 required for generation 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 embodiment of the present invention that is considered to be large, it is considered to be about 2.3 or more, for example. Similarly, the strong jump water is generated when the upstream fluid number is 9 or more in the general case as described above, whereas in the case 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 to occur at about 12.4 or more, for example.

  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. If you have already inhaled and have dissolved a certain amount of air in the hot water after a certain time from the situation that you are trying to dissolve the air in that hot water, you can dissolve it 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 surface of the hot and cold water (the situation where the air layer is not formed until 1 to 3 minutes from the start of operation, and the air layer is formed 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 the flow rate just before the air layer is not formed (if the fluid number has the size and shape of the tank 31 of the embodiment, the vibration jumping to the steady jumping) However, if the amount of dissolved gas in the liquid layer increases, the influence of water viscosity increases, and the flow rate necessary to change the jumping phenomenon (boundary). Fluid number). 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. That is, according to the present invention, the notch formed in the partition plate of the pressurized container is formed into a substantially triangular shape and has a sloped notch (because it has a configuration requirement (E) described later), thereby lowering the flow rate. Even with a 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 embodiment, the flow rate of water introduced into the pressurized vessel 30 is set to a flow rate larger than 5 liters / minute, and the fluid number is 6.14. The air layer A can be eliminated by increasing the flow rate. On the other hand, if the flow rate is less than 5.5 liters / minute or the fluid number is less than 6.24, the air layer A can be formed. . 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. It is thought that a phenomenon called (or jumping water) occurs, but the shape and size of the tank 31 of the embodiment (from the portion (for example, the partition plate 34) where water flows down into the tank 31 as a jet stream) (For example, the outlet port 33 is 15 cm and the tank diameter (inner diameter Φ4.5 cm)), the air layer A is not formed at the stage from the vibration jumping to the steady jumping, so that the steady jumping does not create the air layer A. It is considered to be a natural jump. Further, the pressurized container 30 of the application example of the embodiment is an aspect that reaches the water surface of the hot water in the tank 31 without being substantially 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.

  Furthermore, in the pressurized container 30 of the application example of the embodiment, the shape of the notch K is made substantially triangular, so that the portion in contact with the interval between the notch K and the adjacent notch K, that is, the flow of the adjacent water flow. It is considered that the space can be made more effective by having a structure (inclined gap structure) in which the ratio of water flowing at the contacting portion can be smaller than in the case of a rectangular notch. 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 present invention, 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 as compared to the rectangular notch. 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 due to chasing, the kinematic viscosity coefficient ranges 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 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. It is thought that the channel width becomes large, and as a result, the influence of the viscosity appears, and therefore a value with a large fluid number for occurrence of jumping water is required.

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, the curve i in FIG. 21B becomes i ′, and when the influence of further viscosity is also corrected (considering the boundary movement due to the room for water collapse as indicated by the arrow Ms), the curve i. The intersection of this curve i ”and the amount of energy released 3.5 (Y-axis) at the jumping water intersects with the boundary f ″ of the vibration jumping and the steady jumping that has been affected by the movement, and at this intersection 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 left boundary f "between the vibration hydraulic jump and stationary hydraulic jump Therefore, vibration jumping occurs, and when the upstream flow number 9.45 becomes a normal flow, energy corresponding to a fluid number 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 of a present Example produces | generates a fine bubble in the hot water supply operation function, the operation function of the automatic driving | operation containing the hot water filling to the bathtub 26, the reheating operation function of the bathtub hot water, and the hot 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 hot 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 bathtub hot water does not become lower than the allowable temperature of the bath beyond 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, and the fine bubble generation control configuration includes a mode switching control means 40, a pump drive control means 41, and an air introduction valve opening / closing control means. 42 and combustion control means 77. 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.

  Thus, when the reheating operation and the fine bubble ejection operation are performed simultaneously, hot 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), control by the pump drive control means 41 as described later is performed so as to open the flow rate corresponding on-off valve 48, and the efficiency is improved. Speeding up the general pursuit.

  The mode switching control means 40 drives the circulation pump 21 at a rotational speed equal to or higher than a predetermined rotational speed, and vigorously agitates hot and cold 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 forming the air layer A at the time of the operation of the mode is finely crushed by the momentum of stirring (by the bathtub hot water introduced at high pressure vigorously) and dissolved in the bathtub hot 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.

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), and either of them is hot 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 circulating pump 21 is lowered to a pump rotational speed Lo (1700 rpm) that is substantially the same as the air layer forming rotational speed (2000 rpm), and the flow rate of hot 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 reheating operation with the flow rate corresponding on-off valve 48 closed, the reheating 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, combustion of the reheating burner 16 is resumed, and the pressure of the hot water is set to a predetermined pressure or higher to eject fine bubbles from the fine bubble ejection device 39. While mourning.

  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. In addition, when the combustion of the additional 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 hot 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.

  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 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 hot water introduced into the main body 49 from the outgoing pipe 24 side passes through at least one of the fine bubble generating flow path 46 and the reheating flow path 47 and is discharged from the discharge port 56. In addition, the flow path 46 for generating fine bubbles causes the bathtub 26 to be ejected into the bathtub 26 through the nozzle 45 as shown by the arrow in FIG. Microbubbles are generated inside. The reheating channel 47 guides the bathtub hot 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 hot water introduced into the fine bubble ejection device 39, so that the water pressure is the valve closing set pressure generated at the set flow rate. The valve is closed at the above time, and once the valve is closed, the hot water is led out only through the narrow bubble generating channel 46 having a narrow channel, so that the pressure rises rapidly. 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 response to the operation of 48, hot 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 hot water introduced into the fine bubble ejection device 39 becomes 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 restarting energization) and setting it to the revolving speed (or voltage), the hot water is reheated as shown by the solid arrow. It is led out into the bathtub 26 and a normal bathtub hot water reheating operation is performed. During this reheating operation, hot water passes through the reheating channel 47, and the fine bubble generating channel 46 is much narrower than the reheating channel 47. When not closed, it preferentially passes through the reheating channel 47 (the flow rate of hot 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, at the time of the fine bubble ejection operation, the flow rate of the hot water introduced into the fine bubble ejection device 39 is 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 hot water is jetted into the bathtub 26 through the fine bubble generating flow path 46 as indicated 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 the hot water introduced into the fine bubble ejection device 39 is small, the hot 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 the hot 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 the hot water introduced into the fine bubble ejection device 39 becomes equal to or higher than the set flow rate (here, about 6 liters / minute), the flow rate corresponding on-off valve 48 is moved to the spring 53 as shown in FIG. Therefore, the hot water cannot pass through the reheating channel 47 and is ejected into the bathtub 26 through the fine bubble generating channel 46. When bath water is circulated 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 hot water level in the tank 31 exceeds the set water level, the time for opening the air introduction valve 38 is lengthened, and the hot water in the tank 31 is increased. The opening / closing control of the air introduction valve 38 may be performed so that the volume of the air layer between the water surface and the upper end of the container is increased and the water level of the hot water is set to a set water level or less.

  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. Since hot water passing through the recirculation circuit 25 flows as shown by an arrow A in the figure, the air is dissolved in this hot water.

  Moreover, in the bath apparatus of the present embodiment, the amount of air introduced when the recirculation circuit 25 is circulated in the hot water circulation of 5.5 to 7 liters / min is about 400 cc / min to 700 cc / min (when converted to 1 atm). It has become. 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 hot water is introduced from the pouring channel 14 as indicated by an arrow B in the figure, this hot 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, the apparatus with the function of generating fine bubbles according to the present invention does not require the water stream to be a jet stream when the water stream is introduced into the pressurized container 30 in the undissolved air layer formation mode, and may be a normal flow.

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 device with the function of generating fine bubbles according to the present invention is operated by the mode switching control means 40 when operating in the air layer non-forming mode while chasing, compared to the air layer non-forming mode when no chasing. Thus, the timing of entering the undissolved air layer formation mode may be increased.

  Further, 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 (at the start of the cloudy operation), 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.

  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, data on the solubility 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 shown. 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 generation of bubbles continues while chasing, the temperature of the bath water increases. Therefore, while measuring this temperature change with the bath temperature sensor 18, the air solubility with respect to the water temperature in FIG. 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, so that the operation time in the undissolved air layer formation mode is reduced by that amount, 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.

  Moreover, when the apparatus with a fine bubble generating function to which the pressurized container of the present invention is applied is a bath apparatus, the system configuration is not limited to the configuration shown in FIG. 1 but is set as appropriate. That is, for example, in the above embodiment, the introduction of air is performed using the negative pressure of the circulation pump 21 (air is introduced when the suction side of the circulation pump 21 becomes negative pressure) 39, for example, a system configuration as shown in FIG. 39 is formed, the 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 flow is driven by the circulation pump 21. May be configured to be sent to the pressurized container 30.

  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, when the main purpose is to measure the amount of air layer without dissolving the air, the water flow in the undissolved air layer formation mode 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 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 above embodiment, since the jumping classification of FIG. 23 (b) is the basis, based on this jumping classification, the fluid number of the boundary between the vibration jumping and the steady jumping is set to 6.2, and 6.2 is vibrated. The initial value ( number of initial fluids) of the boundary fluid number between the water jump and the steady water jump is given in advance to the learning mode control means of the mode switching control means 40. 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 air layer (undissolved air layer A) is judged whether or not there is an air layer (undissolved air layer A) with a one-tempo delay with respect to the change in the pump rotation speed. This is to correct so that an accurate boundary flow rate can be obtained. 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. In addition, since the weak jump water may be divided into the weak jump water and the 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 the above shape, the above 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 the operation in the non-formation mode is performed, or as in the above embodiment, the undissolved air layer formation mode operation is performed by the vibration jump, and the boundary between the vibration jump-steady jump and the boundary of the steady jump-strong jump is two. 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 a strong water jump across the boundary. 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, 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.

  Moreover, in the bath apparatus of the said Example, although the fine bubble ejection apparatus was provided in the connection part of the bathtub 26 and the recirculation circulation path 25 in the bath apparatus shown, for example 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.

  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, 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 said Example, although the water injection port 32 of the pressurized container 30 was formed downward, as shown, for example in FIG. 35, you may form upward and the angle of the water injection port 32 is set suitably. It is what is done.

  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 way, the triangular notch K is formed in the partition plate 34 in the pressurized container 30 of the application example of the embodiment, and the water flow passing through the notch K adds the triangular base to the inner wall surface of the tank. As shown in FIG. 36 (a), the water flow that has passed through the substantially quadrangular through-hole 140 is divided by its diagonal lines, and each triangular water flow is shown in FIG. The bottom flows along one side of the plate to be joined 134, and the other triangular water flow flows to the other side of the partition plate 134 (on the opposite side of the surface to which one triangular water flow is added). ) Along the 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 pressurization container 30 is set to inner 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 also in the structure shown in FIG. The attached surface forming plate 134 is provided so as not to be partitioned to the upper side of the tank 31 and the attached surface is a flat surface. However, in the configuration in which the water flow is made to flow along the attached surface, the attached surface has a gentle arc shape. The curved surface or the flat surface of the arcuate curved surface may be a curved surface having a small radius of curvature (more curved), or the bottom portion of FIGS. 37 (n), (0), (p), (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 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, cylindrical pipes made of vinyl chloride or the like are arranged in a container (tank) 31 such as a drum can as shown in FIG. 36 (a), for example, as shown in FIG. 38 (a). The inner wall surface of 136 is a surface to be attached (the cylindrical wall of the pipe 136 is a curved surface to be added), and as shown by dots in FIG. The pipe 136 is fixed by filling the gap by providing an agent, and a partition plate 34 having a plurality of hexagonal through holes 140 formed thereon is placed on the pipe 136, and the water flow exiting the hexagonal through holes 140 has a cross section. A substantially triangular shape may be formed to flow down the surface to be adhered. In FIGS. 38A to 38C, the partition plate 34 is shown through (in a state where a transparent partition plate 34 is provided).

  Further, the through holes and notches in the water passage portion need not have the same shape and size. For example, as shown in FIG. 38 (b), two large and small through holes 140 (140a, 140b) are formed, Two types of 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. .

  Further, for example, as shown in FIG. 38 (c), even if the size and shape of the through hole 140 of the water passage portion are the same, the arrangement of the surface to be added (here, the arrangement of the surface to be added forming plate 134) Two different water streams can also be formed depending on the difference in the aspect. 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, as shown in FIGS. 38D and 38E, even when the through hole 140 has a substantially triangular shape, the water flow that passes through the single through hole 140 depends on the arrangement form of the adherend surface forming plate 134. The plurality of water flows having a substantially triangular cross section can exit the through hole 140. 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 arrangement of the surface to be added, the total area of notches and through-holes is almost the same as in the application example of the embodiment, and as shown in FIGS. 38 (a) and 38 (b). In addition, if water is not allowed to pass through a part of the notch or the through hole, the total area of the notch or the through hole is reduced by the amount that the water does not pass.

  Further, the water level detection in the pressurized container 30 may be a photoelectric type or a float type instead of the electrodes 35, 36, and 137.

  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.

  Further, in the pressurized container 30 of the application example of the above embodiment, there is a boundary between presence / absence of the air layer (undissolved air layer A) between the vibrational jumping water and the steady jumping water. It is considered that the boundary with and without air layer moves between the vibration jump and the boundary with no air layer when the container is enlarged. 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 (10)

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 an external water supply unit is connected to the water inlet side of the pressurized container, and the outlet side of the water in the pressurized container The outlet side pipe connected to an external water tank is connected to the inlet side pipe, and an air introduction valve and a pump are interposed in the inlet side pipe, and the pump is connected to the air introduction valve. In the closed state, water is sent to the pressurized container side, and in the opened state of the air introduction valve, water and air introduced from the outside to the inlet side conduit through the air introduction valve are sent to the pressurized container side. And at least one of air sent from the pump to the pressurized container and undissolved air in the pressurized container is contained in the pressurized container. Not dissolved air layer to be formed on the tank an air layer of yet-dissolved air un dissolved air which could not be dissolved in the water in the pressurized vessel separate from the water in the pressurized vessel with is dissolved in has a function of forming mode, and the function of the pressure vessel water with vigorous air layer non-forming mode to be stirred in the tank as the air layer of the non-dissolved air is not formed in the tank of the rotational speed of the pump Mode switching control means for controlling the switching between the air layer non-forming mode and the undissolved air layer forming mode by controlling the air layer, and the connecting portion between the outlet side pipe and the outlet tank. provided with have a water or fine bubble ejection device for ejecting microbubbles in water in front Symbol aquarium Ri by the be ejected into the water in the water tank of the air the delivery side duct of dissolved water And the pressurized container includes the tank. A partition plate for vertically partitioning the inside of the tank is provided below the inlet for injecting water into the tank, and a water passage portion through which water passes from above to below the partition plate is formed on the partition plate. The water passing through the water passage part flows down to the lower side of the tank along the surface to which the water is added, and the capacity of the pressurized container and the water introduced into the pressurized container The value of the upstream fluid number, which is the fluid number of spray water passing through the water passage portion, varies depending on the flow rate and the total area of the water passage portion formed on the partition plate in the pressurized container. And the mode switching control means sets the upstream fluid number of the pressurized container to a value smaller than the boundary fluid number serving as the boundary of the jumping phenomenon classification to set the undissolved air layer formation mode, and The value of the side fluid number is set to a value equal to or larger than the boundary fluid number. Fine bubble generating function and wherein the to Rukoto and the air layer non-forming mode by. A tank constituting a pressurized container into which water or water containing air is introduced under pressure, wherein the tank is configured to store the water introduced into the tank while stirring; An inlet side pipe connected to an external water supply unit is connected to the inlet side of the inlet side, and the tip side of the inlet side pipe is inserted into the tank to form an injection pipe for injecting water into the tank. A water outlet is formed on the water outlet side of the tank, and an outlet side pipe connected to an external water tank is connected to the outlet, and the inlet side pipe is connected to the inlet side pipe. Is provided with an air introduction valve and a pump. The pump sends water to the tank side when the air introduction valve is closed, and the water is introduced from the outside through water and the air introduction valve when the air introduction valve is open. The air introduced into the side pipe is sent to the tank side, and is sent from the pump to the tank. At least one of dissolved air and undissolved air in the tank is dissolved in the water in the tank, and undissolved air that could not be dissolved in the water in the tank is separated from the water in the tank A function of an undissolved air layer formation mode that forms an air layer of air in the tank and a function of an air layer non-formation mode that vigorously stirs the water in the tank so that an air layer of undissolved air is not formed in the tank And a mode switching control means for controlling switching between the air layer non-forming mode and the undissolved air layer forming mode by controlling the number of revolutions of the pump, and in the outlet side pipe or on the outlet side Fine bubbles are ejected into the water in the water tank by ejecting water in which the air is dissolved provided in a connection portion between the pipe and the water tank into the water in the outlet side pipe or the water in the water tank. Make Has a fine air bubbler discharge device, wherein the distal end side of the injection tube is formed of water passing portion passing through the water introduced into the tank through the infusion pipe, the water passing through the water passage of water of have a structure that flows down to the tank bottom side along the添面, and capacity of the tank which constitutes the pressure vessel, the water introduced into the tank flow and, before Kisui passing portion depending on the total area and that the value of the upstream Froude number is a number of Froude running water elevation through the water passing portion is changed, the mode switching control means, hydraulic jump phenomenon the values of upstream Froude number of the tank wherein the non-dissolved air layer forming mode by the boundary Froude number is less than value at the boundary of the classification, and the air layer non-forming mode by the value of the number of upstream Froude to a value equal to or larger than the number of the boundary Froude fine fine bubbles onset you, characterized in that Equipment with raw functions. 3. The apparatus with fine bubble generating function according to claim 1 , wherein the mode switching control means changes the value of the upstream fluid number by changing the flow rate of water introduced into the pressurized container. The boundary fluid number of the jumping phenomenon classification is given in advance as the initial fluid number, and the flow rate of water that forms an air layer of undissolved air in the tank of the pressurized container and the air of the undissolved air in the tank The flow rate of water at the boundary with the flow rate of water where no layer is formed is obtained, the provisional fluid number corresponding to the boundary flow rate is obtained, the amount of deviation of the provisional fluid number from the initial fluid number is detected, and based on the amount of deviation Learning mode control means for detecting the target fluid number, and the mode switching control means is introduced into the pressurized container so that the value of the upstream fluid number is smaller than the target fluid number obtained by the learning mode control means. By controlling the flow rate of the water to be generated, an undissolved air layer formation mode is set, and the pressure vessel is adjusted so that the value of the upstream fluid number is equal to or greater than the target fluid number. Fine bubble generating function according to claim 1 or claim 2 or claim 3, wherein that an air layer non-forming mode by controlling the flow rate of water entering.   The mode switching control means drives the pump rotation speed at a rotation speed smaller than a preset rotation speed when in the undissolved air layer formation mode, and sets the rotation speed of the pump at the set rotation speed when in the air layer non-formation mode. The apparatus with a fine bubble generating function according to claim 3 or 4, wherein the mode switching control is performed by changing the flow rate of water introduced into the pressurized container by being driven at a number greater than or equal to. The pressurized container is provided with a water level detecting means for detecting the level of the stored hot water stored in the tank of the pressurized container, and the detected water level is determined based on the detection result of the water level detecting means provided in the pressurized container. When the water level exceeds the set high reference water level, the air introduction valve is opened to introduce air into the inlet passage from the outside, and the stored water in the pressurized container is sent to the pressurized container together with water by a pump. Increase the volume of the air layer of undissolved air between the water surface and the upper end of the container to make the water level of the stored water below a set high reference water level, and when the detected water level becomes lower than the set low reference water level, an air introduction valve The water level is set by reducing the volume of the air layer by sending water to the pressurized container by the pump and dissolving the air in the air layer of the undissolved air in the water. Over the water level Fine bubble generating function according to any one of claims 1 to 5, characterized in that it has an air inlet valve opening and closing control means for opening and closing control of the air inlet valve.   The water tank is a bathtub, and an inlet side pipe line is connected to the bathtub, and the bathtub also serves as a water supply unit, and an outlet side pipe is provided with a reheating heat exchanger for reheating the bathtub water. The reheating heat exchanger, the outlet side pipe, and the inlet side pipe are formed to form a reheating circulation path, and the bath water is supplied to the inlet side pipe from the inlet side by driving a pump. 7. A bath apparatus having a function of passing through a pressurized container and the outlet side pipe in order and returning to the bathtub and circulating the recirculation circuit. The apparatus with a microbubble generation function as described. The fine bubble ejection device includes a fine bubble generation flow path for generating fine bubbles in water by ejecting water circulated through the recirculation circulation path into the water through a nozzle, and the water without passing through the nozzle. and fired passage follow to derive the water, the fine bubble jet device and closing the flow rate corresponding opening closed when the flow rate is equal to or greater than the set flow rate depending on the flow rate of water introduced is provided in the pump when fine bubbles jetting operation controlled by and the flow rate of the water introduced into the micro-bubble jetting device to the flow rate corresponding opening closed is closed by more than the set flow rate of the jet the water into the water through the fine bubble generation flow path It is allowed, reheating during operation before the water into a state in which the flow rate of the water introduced into the micro-bubble jetting device opens the flow corresponding opening closed by less than the set flow rate by control of the pump Fine bubble generating function according to claim 7, wherein the through Reheating passage having a pump driving control means for deriving the water.   The function of generating fine bubbles to eject fine bubbles into the water from the fine bubble jet device, and the reheating operation of circulating the hot water in the bathtub in the recirculation circuit and replenishing the hot water with the recuperation heat exchanger The apparatus with a fine bubble generating function according to claim 7 or 8, which has a function and a function of simultaneous generation of fine bubbles and a reheating operation for replenishing and heating hot water in a bathtub at the time of generating fine bubbles.   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 9.

Images