JP5865680B2 - PRESSURE CONTAINER AND DEVICE WITH FINE BUBBLE GENERATION FUNCTION PROVIDED WITH THE PRESSURE CONTAINER - Google Patents

Description

  The present invention relates to a pressurized container applied to an apparatus such as a bath apparatus having a fine bubble generating function for generating fine bubbles (white turbidity) in water in a bathtub or the like, and a fine bubble generating function including the pressurized container. It is related with the attached device.

  A bubble generator that generates bubbles in the bathtub water is used. Among them, by discharging very fine bubbles from the bubble generator into the bathtub water (tub hot water), There is an increasing demand for a bath apparatus having a fine bubble generating function that generates fine bubbles that appear cloudy due to a large amount of fine bubbles (for example, a bubble diameter of about several microns to several tens of microns). 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).

Japanese Patent No. 2512952

  By the way, in order to generate fine bubbles in the bathtub water, for example, in a separate circuit parallel to the recirculation circuit connected to the bathtub, air is pressurized to the water (tub water) passing through the recirculation circuit Providing a pressurized container for dissolution is performed. 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 provided in the vicinity of the water inlet 32. A configuration has been proposed in which water is stirred while being applied to the member 99 and stirred.

  However, in this configuration, the sound (crushed sound) generated when water is applied to the target member 99 in the air layer is loud, and further, the bath apparatus having the function of generating fine bubbles can be downsized and reduced in price. Therefore, when the pressurized container is reduced in size, as shown in FIG. 44 (b), the water injected into the tank 31 is vigorously stirred, and just when carbonated water is poured into the cup vigorously, Bubbles come to the edge (the tank 31 is filled with bubbles), but when carbonated water is poured from above the bubbles, the newly poured carbonated water bubbles are formed on the bubbles. There was a problem that an air layer was not formed.

  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 the purpose thereof is to pressurize while appropriately adjusting the volume of the air layer of undissolved air formed in the tank even if the tank is downsized. A pressurized container capable of dissolving an appropriate amount of water (a sufficient amount to generate a large amount of fine bubbles and clouding the bath water) into the water poured into the tank in a state, and the pressurized container Using an appropriate control, an air layer of undissolved air can be properly formed in the tank of the pressurized container, and fine bubbles such as a bath apparatus that can generate fine bubbles in the water of a water tank such as a bathtub. The object is to provide a device with a bubble generating function.

In order to achieve the above object, the present invention provides means for solving the problems with the following configuration. That is, the pressurized container according to the first aspect of the present invention is formed with an inlet for pouring the water containing air into the tank at the upper part of the tank into which the water containing air is introduced under pressure. The water outlet has a water outlet, and a partition plate is provided below the inlet for partitioning the tank up and down with a gap therebetween. A plurality of water passage portions through which water passes are formed by notches or through holes, and the shape of the notches or through holes is relative to the flow direction of water passing through the water passage portions of the notches or through holes. The cross-sectional shape in the direction orthogonal to each other is formed into a substantially triangular shape, and a surface to which water is added extends below the partition plate so as to extend in the vertical direction of the tank. flow of water after the water is poured is through the water passing portion Orthogonal direction of cross section forms a substantially triangular water flow water flow the cross section substantially triangular of a substantially triangular bottom portion is brought into contact with the object to be添面 relative direction along the target添面wherein said water passage section so as to flow down to the lower side of the tank Te and the添面is formed by the water the is stored while being agitated flows down along the target添面, the said water A structure in which an air layer of undissolved air in the tank is formed between the water surface of the water stored under the partition plate and the lower surface of the partition plate while the undissolved air in the tank is dissolved with Tei Ru configuration form to be a means for solving the problems.

  Further, in the pressurized container of the second invention, in addition to the configuration of the first invention, the water passage portion is formed on the outer peripheral edge portion of the partition plate with a space between each other in the outer peripheral direction of the partition plate. A plurality of substantially triangular cutouts, each cutout being provided in such a manner that the diameter of the partition plate in the circumferential direction is reduced in diameter toward the center of the partition plate, and the opening of the cutout is the Close to the inner peripheral wall of the tank, the tank inner peripheral wall forms a surface to which water is added, and after water passes through the notch, the tank falls to the lower side of the tank along the surface to be added to the inner peripheral wall of the tank. It is characterized by being configured to be stored while being stirred.

  Further, in the pressurized container according to the third aspect of the invention, in addition to the configuration of the first or second aspect, the water passage portion has a substantially triangular cutout or through hole. In the formation region, a supported surface forming plate extending in the vertical direction of the tank is disposed at least on the lower side of the partition plate, and the supported surface forming plate disposed in the through hole forming region is The upper end side is aligned with the base portion of the substantially triangular shape, and the attached surface forming plate disposed in the notch forming region has the upper end side aligned with the opening of the notch, and the water passage portion The structure is characterized in that the water that has passed through falls on the lower surface of the tank along the surface to be added of the surface to be added and is stored while being stirred.

Furthermore, pressurized container of the fourth invention, Shin設the first or in addition to the configuration of the second or third invention, the vertical direction of the tank formation region of the cutout or through hole of the water passing portion Each of the cross sections through which the divided surface forming plate is arranged so that the cutout or the through hole is divided into a plurality of substantially triangular shapes , and each of the divided water passage portions is provided. substantially triangular water flow is characterized in that the forms configured to be stored with stirring to fall to the lower side of the tank along the target添面of the添面forming plate.

  Furthermore, a device with a function of generating fine bubbles according to a fifth aspect of the invention has the pressurized container according to any one of the first to fourth aspects of the invention, and a water supply section is provided on the water introduction side of the pressurized container. The inlet side pipe to be connected is connected, and the outlet side of the water from the pressurized container is connected to the outlet side pipe connected to the water tank. The side pipe is provided with an air introduction valve and a pump. The pump sends water to the pressurized container 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 configured to be sent to the pressurized container side, and the air sent from the pump to the pressurized container and undissolved in the pressurized container Undissolved in which at least one of the air was dissolved in the water in the pressurized container and was not completely dissolved in the water in the pressurized container The function of an undissolved air layer forming mode in which air is separated to form an air layer of undissolved air in the tank, and the air layer of undissolved air is not formed in the tank of the pressurized container. A mode switching control unit that has a function of an air layer non-formation mode for vigorously stirring water and controls the switching between the air layer non-formation mode and the undissolved air layer formation mode by controlling the rotation speed of the pump. And water which is provided in a connection portion between the outlet side pipe or the outlet side pipe and the water tank and in which the air is dissolved is jetted into water in the outlet side pipe or water in the water tank. Thus, a configuration having a fine bubble jetting device for jetting fine bubbles into the water in the water tank is used as means for solving the problem.

  Furthermore, in the device with a function of generating fine bubbles according to the sixth aspect of the invention, in addition to the configuration of the fifth aspect of the invention, the pressurized container has a capacity of the pressurized container and a flow rate of water introduced into the pressurized container. And according to the total area of the water passage portion formed in the partition plate in the pressurized container, the value of the upstream fluid number, which is the fluid number of the spray water passing through the water passage portion, is changed, The mode switching control means sets the upstream fluid number of the pressurized container to a value smaller than the boundary fluid number that is a boundary of the jumping phenomenon classification to set the undissolved air layer formation mode, and sets the fluid number to the boundary fluid The air layer non-formation mode is set by setting the value to a number or more.

  Furthermore, in the device with a fine bubble generating function of the seventh invention, in addition to the configuration of the sixth invention, the mode switching control means changes the flow rate of water introduced into the pressurized container, thereby changing the number of upstream fluids. The value of is changed.

  Furthermore, in the apparatus with the fine bubble generating function of the eighth invention, in addition to the configuration of the seventh invention, the boundary fluid number of the jumping phenomenon classification is given in advance as the initial fluid number, and the inside of the tank of the pressurized container The flow rate of water at the boundary between the flow rate of water in which an air layer of undissolved air is formed in the tank and the flow rate of water in which the air layer of undissolved air is not formed in the tank is obtained and provisional fluid corresponding to the boundary flow rate is obtained. A learning mode control means for obtaining a number, detecting a deviation amount of the provisional fluid number relative to the fluid number, and detecting a target fluid number based on the deviation amount, wherein the mode switching control means is a value of the upstream fluid number Is set to an undissolved air layer formation mode by controlling the flow rate of water introduced into the pressurized container so that the value is smaller than the target fluid number obtained by the learning mode control means. Characterized by an air layer non-forming mode by controlling the flow rate of the water value of the Froude number is introduced into the pressurized vessel to a value above the target number of Froude.

  Furthermore, in the device with a fine bubble generating function of the ninth invention, in addition to the configuration of the seventh or eighth invention, the mode switching control means predetermines the number of revolutions of the pump in the undissolved air layer formation mode. The flow rate of water introduced into the pressure vessel is changed by driving at a rotation speed smaller than the set rotation speed and by driving the pump rotation speed at the set rotation speed or higher in the air layer non-forming mode. The mode switching control is performed.

Furthermore, in the device with a fine bubble generating function of the tenth invention, in addition to the structure of any one of the fifth to ninth inventions, the pressurized container stores the stored water stored below the partition plate. detecting the water level and the water level detecting means is provided for determining the magnitude of the volume of the air layer of non-dissolved air is formed between the lower surface of the water surface of該貯distilled water the partition plate, the water level When the detected water level exceeds the set high reference water level based on the detection result of the detecting means, the air introduction valve is opened to introduce air into the inlet passage from the outside, and the air is sent to the pressurized container together with water by the pump. By increasing the volume of the air layer of undissolved air between the water surface of the stored water and the upper end of the container, the water level of the stored water is made lower than the set high reference water level, and the detected water level is lower than the set low reference water level. closing said air inlet valve when it is Water is sent to the pressurized container by the pump, and the volume of the air layer is reduced by dissolving the air in the air layer of the undissolved air in the water, so that the water level of the stored water is equal to or higher than a set low reference water level. The air introduction valve opening / closing control means for controlling the opening / closing of the air introduction valve is provided.

  Furthermore, in the device with a fine bubble generating function of an eleventh aspect of the invention, in addition to the configuration of any one of the fifth to tenth aspects of the invention, the water tank is formed by a bathtub, and the bathtub is provided with an inlet side conduit. And the bathtub also serves as a water supply unit, and a reheating heat exchanger for reheating the bath water is interposed in the outlet side pipe, and the reheating heat exchanger and the outlet side pipe are provided. A recirculation circuit is formed, and the bath water is sequentially passed through the inlet side pipe, the pressurized container, and the outlet side pipe by driving the pump to the bathtub. It is a bath apparatus having a function of returning and circulating the reheating circuit.

  In the pressurized container of the present invention, a water inlet through which water containing air is poured into the tank is formed at the upper part of the tank into which water containing air is introduced under pressure. Since the partition plate which partitions the inside of a tank up and down is provided on the side through the space, the water falls to the upper side of the partition plate. Then, water passes from the top to the bottom of the partition plate through the water passage portion formed in the partition plate, and then, on the surface to which water is formed extending in the vertical direction of the tank below the partition plate. In addition, the water flows down to the lower side of the tank and is stored while being agitated, so that the undissolved air in the tank is dissolved in the water and the water surface stored on the lower side of the partition plate and the water An air layer of undissolved air in the tank is formed between the lower surface of the partition plate.

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 Although it is difficult to generate fine bubbles from water well and the turbidity of bath water becomes small, in the present invention, the water passage part formed in the partition plate is formed by a notch or a through-hole, and the A plurality of cutouts or through-holes are provided, each having a substantially triangular cross-section in a direction perpendicular to the flow direction of the water passing through the water passage part of the cutout or through-hole. water passage portion forms with the direction of the cross-sectional shape is shaped substantially triangular water flow perpendicular to the water flow direction after passing through the water, the cross section substantially triangular water flow the substantially triangular bottom portions wherein along with the object添面into contact with the添面 Since flows down to the lower side of the tank, without changing the size of the height direction relative to the bottom portion of the substantially triangular shape, it is possible to adjust the total notch area and the total through-hole area.

  In other words, the length of the bottom portion is changed (for example, the length of the bottom portion of each substantially triangular notch or each triangular through hole is changed, or the diagonal line of the substantially rectangular through hole is formed. And the length of each diagonal line is changed to correspond to the length of the total base portion of the substantially triangular notch opening or the substantially triangular through-hole, or the substantially rectangular shape. By forming an attached surface corresponding to the through hole and changing its total diagonal length (changing the number of notches and the number of through holes), the total notch area and total through hole area can be reduced. The total cross-sectional area of the water flow as it passes through the water passage can be adjusted.

In addition, the shape of the through hole and the cutout is not limited to a substantially triangular shape or a substantially rectangular shape, and even if it is of other polygonal shape, the polygonal shape is divided (segmented) according to the shape. A surface to be added is formed in a mode (for example, a notched surface of a water passage portion or a through-hole forming region is formed by extending a notched surface forming plate extending in the vertical direction of the tank into the notch or the through hole into a plurality of substantially triangular shapes. It arranged such that the manner of dividing the shape), the divided respective substantially triangular cross section of the water flow passing through each of the water passage section, the object is brought into contact with the bottom portion to the object to be添面 It suffices to flow down to the lower side of the tank along the accessory surface, and in either case, the total cutout area and the total through-hole area can be adjusted similarly. Therefore, it is thought that the flow velocity falling through the notch and the through hole can be increased, thereby making it easier for the air in the tank to dissolve in the falling water and increasing the turbidity, By applying the pressurized container of the present invention, fine bubbles can be generated satisfactorily.

In addition, since the water level detection means is provided in the pressurized container, the water level below the partition plate of the pressurized container can be accurately detected, so the size of the air layer can be detected and its size can be determined. As will be described later, in the apparatus with a fine bubble generating function of the present application, the air introduction valve and the like can be accurately controlled based on the determination result of the size of the air layer . Further, the water level detection means can be formed using, for example, an electrode or the like, and can measure the amount of undissolved air in the tank by a simple method. It is possible to control the amount so that undissolved air in the tank becomes excessive and undissolved air does not flow before the tank while storing sufficient undissolved air to generate an amount of fine bubbles.

  Moreover, the apparatus with a fine bubble generating function of the present invention is provided with an inlet side pipe for introducing water into the pressurized container of the present invention and an outlet side passage for extracting water from the pressurized container. A water tank is connected to the pipe line, a water supply unit is connected to the inlet-side pipe line, and an air introduction valve and a pump are interposed. The pump supplies water to the pressurized container when the air introduction valve is closed. In the open state of the air introduction valve, water and air introduced from the outside through the air introduction valve to the inlet side pipe are sent to the pressure vessel side by the pressure vessel. When water in which air is sufficiently dissolved is ejected from the microbubble ejecting device provided in the outlet side pipe line or the connecting part between the outlet side pipe line and the water tank, fine bubbles can be generated satisfactorily.

  Furthermore, according to the device with the function of generating fine bubbles of the present invention, the pressurized container dissolves the air sent by the pump and the undissolved air remaining in the tank of the pressurized container in the water in the tank. A function of an air layer non-formation mode in which the water in the tank is vigorously stirred so that an air layer of undissolved air is not formed in the tank of the pressure vessel, and the pump is driven at a rotational speed smaller than the set rotational speed. It has a function of an undissolved air layer formation mode for forming an undissolved air layer in the tank of the pressurized container, and this mode switching can be controlled by the mode switching control means.

  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 water in the pressurized container, and the generated fine bubble concentration can be increased. Since the size of the undissolved air layer can be detected during the operation of the function of the undissolved air layer formation mode, it is easy to measure the amount of air dissolved in the water, and an appropriate function of generating fine bubbles can be obtained. it can.

  In the present invention, the pressurized container is a total of the capacity of the pressurized container, the flow rate of water introduced into the pressurized container, and the water passage portion formed in the partition plate in the pressurized container. In accordance with the area, the value of the upstream fluid number, which is the fluid number of the spray water passing through the water passage portion, is changed. By setting the value of the upstream fluid number to a value smaller than the boundary fluid number serving as the boundary of the hydraulic jump phenomenon classification, an undissolved air layer formation mode is set, and the fluid number is set to a value greater than or equal to the boundary fluid number. By making the air layer non-formation mode by the above, it is possible to appropriately form an undissolved air layer in the non-dissolved air layer formation mode, and in the air layer non-formation mode, the air is more dissolved. By causing pancreatic like (more severe) hydraulic jump phenomenon can be performed dissolved air more efficiently.

  Note that the total area of the water passage portion corresponds to the total area of the notches and through holes formed in the partition plate, and is substantially the same as the total area of the notches and through holes depending on the arrangement of the surface to be attached. However, if water is not allowed to pass through a part of the cutout or the through hole, the total area of the cutout or the through hole is reduced by the amount that the water does not pass through.

  Furthermore, in the apparatus with fine bubble generation function of the present invention, the mode switching control means can easily change the value of the upstream fluid number by changing the flow rate of water introduced into the pressurized container, and It is possible to appropriately change the number of fluids on the upstream side to appropriately form an undissolved air layer in the undissolved air layer formation mode, and to dissolve the air more efficiently in the air layer non-formation mode.

  Furthermore, in the apparatus with the fine bubble generating function of the present invention, the boundary fluid number of the jumping phenomenon classification is given in advance as the initial fluid number, and the initial fluid number and the flow rate that can be generated and the flow rate that the undissolved air layer that is actually measured can and cannot be By providing a learning mode control means that detects the target fluid number based on the above, even if the boundary flow rate actually changes due to various conditions such as the water temperature and the presence or absence of bathing agent, the pump rotation speed can be reduced due to filter clogging. Even if the actual flow rate is small compared to the flow rate expected from the rotation speed and the boundary flow rate has not actually changed, in any case, the appropriate target fluid number according to the situation Can be requested. 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.

  Furthermore, in the apparatus with a fine bubble generating function of the present invention, 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 enter from the outside. Air is introduced into the side passage, and the volume of the undissolved air is increased by sending the air to the pressurized container together with the bathtub water by a pump so that the water level of the stored water is lower than a set high reference water level, When the detected water level is lower than the set low reference water level, the air introduction valve is closed and the bathtub water is sent to the pressurized container by the pump, and the air in the air layer of the undissolved air is dissolved in the bathtub water. By reducing the volume of the undissolved air layer and setting the water level of the stored water above the set low reference water level, the amount (volume) of the undissolved air layer in the pressurized container can always be made appropriate. Add the dissolved proportion of the gas can be properly.

  Furthermore, the apparatus with the function of generating fine bubbles according to the present invention is a bath apparatus in which a water tank and a water supply unit are used as a bathtub, and the pressure vessel according to the present invention is provided in a recirculation circuit connected to the bathtub. As the structure that sends water or water and air to the pressurized container can generate good fine bubbles to the bathtub, the recirculation circuit and the fine bubble generation function circuit are separated, and a centrifugal pump is provided for each. Compared to the configuration that uses different types of devices, the device configuration can be simplified, and the bath device with the function of generating fine bubbles can be reduced in size and price. In addition, since the fine bubbles as described above can be generated in the bathtub, an excellent bath apparatus with a function of generating fine bubbles that can be used very comfortably can be realized.

It is explanatory drawing which shows typically the structure of one Example of the pressurized container which concerns on this invention. In an Example, the graph (a) which shows the examination result of the time change of turbidity when changing the total area (gap area) of a notch, and the graph which shows the relationship between the total area of a notch, and average turbidity (B). It is a schematic diagram for demonstrating the air layer and foam layer which are formed when water is put into the pressurized container of an Example or a comparative example. Shown in the Examples, the pressure vessel in which the total area of the notches and 126 mm ^2, when changing the flow rate of the water introduced into the pressurized vessel, the length and the turbidity of the length and the foam layer of the air layer It is a graph. The graph (a) showing the length of the air layer when the flow rate of the water to be introduced is changed in the pressurized container of the example in which the total area of the notch is 126 mm ² and the total area of the notch is 63 mm. Graph showing the relationship between the flow rate of water introduced into the pressurized container and the length of the air layer 4 minutes after the start of operation for the pressurized container of each example set to ² , 84 mm ² , 105 mm ² , 126 mm ² ). It is a schematic diagram which shows the system structural example of the bath apparatus to which the pressurized container of an Example is applied. It is a schematic diagram which shows the control structural example of the fine bubble generation function in the bath apparatus to which the pressurized container of an Example is applied. 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 to which the pressurized container of an Example is applied. It is typical sectional drawing which shows the structure of the fine bubble ejection apparatus provided in the bath apparatus to which the pressurized container of an Example is applied, 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 in the bath apparatus which applies the pressurized container 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 to which the pressurized container of an Example is applied. It is a flowchart which shows the operation example following FIG. 14 of the bath apparatus to which the pressurized container of an Example is applied. 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 to which the pressurized container of an Example is applied, 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 which applies the pressurized container of an Example, and the air introduction valve opening / closing operation | movement accompanying it. It is a graph which shows the relationship between the total area of the notch in the pressurized container of an Example, the number of boundary fluids, and the space | interval of notches. It is a schematic diagram which shows the notch shape currently formed in the partition plate of the pressurized container of an 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. 6 is an explanatory diagram schematically showing a configuration of Comparative Example 1. FIG. 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 comparative example 1. FIG. 10 is an explanatory diagram schematically showing a configuration of Comparative Example 2. FIG. 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 | transduced is changed about the comparative example 2. FIG. It is the top view (a) which shows the structure of the partition plate applied to the comparative example 3, and sectional drawing (b) which shows the positional relationship of a partition plate and a tank inner wall. Regarding the pressurized container in which the total area of the notches is 90 mm ² in Comparative Example 3, the relationship between the length of the air layer, the length of the foam layer, and the turbidity when the flow rate of water introduced into the pressurized container is changed. It is a graph which shows. It is a graph which shows the examination result of the length of an air layer and a foam layer, and turbidity when the total area of a notch is 90 mm < ² > about the comparative example 3. FIG. It is a graph which shows the examination result of the length of an air layer and a foam layer, and turbidity when the total area of a notch is 120 mm < ² > about the comparative example 3. FIG. It is a graph which shows the examination result of the length of an air layer and a foam layer, and turbidity when the total area of a notch is 180 mm < ² > about the comparative example 3. FIG. It is a graph which shows the examination result of the ratio of the air length / bubble length with respect to the total area of a notch, and turbidity about the comparative example 3. FIG. It is a graph which shows the examination result of the relationship between the flow rate of the water introduce | transduced into a pressurization container, and the flow velocity of the water which passes along a notch which changes with comparative example 3 by the total area of a notch. It is typical sectional explanatory drawing which shows the structure of the other Example of a pressurized container. It is typical explanatory drawing which shows the structure of the further another Example of a pressurized container. It is explanatory drawing for demonstrating the formation example of the notch and through-hole which are formed in a partition plate as another Example of a pressurized container. It is explanatory drawing which shows the formation example of the through-hole formed in a partition plate as another Example of a pressurized container, and the example of arrangement | positioning of the to-be-attached surface provided corresponding to a through-hole. 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. It is typical explanatory drawing which shows the other example of application of the pressurized container of 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 other comparative example of a pressurized container. It is typical explanatory drawing for demonstrating the structure and problem of a pressurized container proposed conventionally.

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

  FIG. 1A is a schematic longitudinal sectional view showing a configuration of an embodiment of a pressurized container according to the present invention. As shown in the figure, the pressurized container 30 of the present embodiment 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 the material is polycarbonate. 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. 1A and 1B, a metal partition plate (target plate) 34 for vertically partitioning the inside of the tank 31 with a space below the inlet 32 of the pressurization vessel 30 is provided. Is provided. As shown in FIG. 1 (c), a plurality of notches K as water passage portions through which water passes from the top to the bottom of the partition plate 34 flow down at the outer peripheral end of the partition plate 34. In the outer circumferential direction, a gap S is formed between each notch K and the inner wall surface of the tank 31 as shown in FIG. Each notch K has a substantially triangular shape, and the circumferential diameter of the partition plate 34 is reduced in diameter toward the center of the partition plate 34, and the opening of the notch K is formed in the tank 31. Close to the inner wall. 1D shows an enlarged view inside the broken line frame B of FIG. 1C, and FIG. 1E 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. 1) 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 for passing portions that pass through the electrodes 35 and 36 and the ground electrode 137. In FIGS. 1C and 1E, 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.

  The pressurized container 30 of the present embodiment is applied to a bath device as a device with a fine bubble generation function having a system configuration as shown in FIG. 6, for example, and details of the configuration of the bath device will be described later. However, a circulation pump 21, which is a pump for circulating the bath water, is provided in the recirculation circulation passage 25 connected to the bathtub 26. This bath apparatus pressurizes and dissolves the air introduced from the outside through the air introduction valve 38 into the bath water circulated by driving the circulation pump 21 and discharges the air into the pressurized container 30. That is, water containing air is stirred in the circulation pump 21 and pressurized and introduced into the pressurized container 30, but a part of the air that cannot be dissolved (dissolved) remains as it is (the gas-liquid two-phase mixed flow remains). It reaches the tank inlet 32 of the pressurized container 30.

  In the gas-liquid two-phase mixed flow, the mixing amount (mixing ratio) of air with respect to the liquid (water in this embodiment) is a ratio of the apparent flow velocity (WGO) of air and the apparent flow velocity (WLO) of the liquid. It can be expressed using the gas volume flow ratio. In this embodiment and each comparative example 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 / minute. 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, all of the gas-liquid two-phase mixed phase flow introduced into the pressurized container 30 is considered as Bubble Flow in the examples and the comparative examples described later.

  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).

  Further, in the pressurized container 30 of the present embodiment, 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 that provides a fine bubble generating function for generating fine bubbles (white turbidity) in the bath water by applying the pressurized container 30, air is introduced based on the detected water level of the electrodes 35, 36, and 137. Opening / closing control of the valve 38 is performed. That is, this apparatus with a 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 the schematic operation diagram of (), a system is basically used 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.

  In addition, the apparatus with a fine bubble generation function (for example, a bath apparatus) to which the pressurized container 30 of the present embodiment is applied is an undissolved air layer formation mode in which an undissolved air layer A is formed in a control device that performs the control. And an air layer non-formation mode in which the undissolved air layer A is not formed. In other words, the apparatus with the fine bubble generating function is based on the operation of forming the undissolved air layer in the undissolved air layer forming mode, and the 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, the said apparatus with a fine bubble generation | occurrence | production function will be in the air layer non-formation mode, for example because the flow volume of the water introduce | transduced in the pressurized container 30 is too large, and it is not dissolved When the air layer A is not formed, the undissolved air layer A is formed by controlling the flow rate so as to be in the undissolved air layer forming mode, and the undissolved air formed in the tank 31 is formed. The volume of the air layer A can be appropriately 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 of the present embodiment, the water containing the air poured from the inlet 32 falls onto the central portion of the partition plate 34 as shown by the arrow in FIG. After passing over 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 (the flow bending force due to Bernoulli's theorem and water viscosity) The notch K is provided so that water droplets do not scatter in the air layer A while adhering to the surface to be added to the tank inner peripheral wall (inner wall surface of the tank side peripheral wall) due to an adsorption phenomenon due to the suction effect due to the reaction force. The water that has passed is made to flow along the surface of the inner wall of the tank, and the flow of water is gathered down.

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

  In addition, as will be described in detail later, in the present embodiment, the water flow that passes through the notch K and flows down along the attached surface of the inner wall surface of the tank 31 is a jet (spray water). It reaches the surface of water stored in the lower part of the tank and collides with water, and when the speed drops, it becomes a normal flow. It is thought that vortex motion is generated in the water stored below. 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, in the pressurized container 30 of each of the examples and comparative examples described later, the gas-liquid two-phase mixed flow injected from the injection port 32 of the tank 31 is all β <0.2 and considered as Bubble Flow. Bubble Flow is a flow in which small bubbles are dispersed in a continuous liquid phase, so that the area where the gas contacts the liquid is large, and it is considered to be a flow mode suitable for gas dissolution when thrown into the vortex. However, in the initial stage of the examination in the pressurized container 30 having the same tank 31 as that of the present embodiment and each comparative example, in the Slug Flow 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.

  In other words, the inventor of the present application, in the initial stage of the study for the present invention, in the pressurized container 30 having the same tank 31 as the present embodiment and each comparative example, the water introduced into the pressurized container 30 By setting the flow rate to 5-7 liters / min, β <0.2, and intending to make a bubble flow with 100% liquid slug, contrary to expectation, gas-liquid two phases introduced into the pressurized container 30 Large bubble gas Slug could be seen in the bubble flow of multiphase flow.

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

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

  Instead of directly applying the water introduced from the injection port 32 to the metal partition plate 34 and making it finer, the embodiment shown in FIG. However, compared with these examples, in this embodiment, the gas Slug is refined by directly applying water introduced from the inlet 32 to the metal partition plate 34. Can be performed more efficiently.

  Here, the aspect of the comparative example 2 shown in FIG. 26 will be briefly described. In this example, the through hole 29 is formed in the central portion of the partition plate 34, and the table plate portion 28 covering the upper side of the through hole 29 is provided. The partition plate 34 is provided above and below the partition plate 34 via a gap t. After the water poured from the injection port 32 falls on the table board 34, it passes through the gap t and below the table board 28. After passing along the surface to be attached (see B in FIG. 26 (e)), 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 comparative example 2, but the water poured from the water inlet 32 is collided with the upper side of the through hole 29. A target member 67 is provided in a vertical direction with a gap t between the plate surface of the partition plate 34, and water poured from the water inlet 32 falls on the target member 67 and collides, and then passes through the gap t. After passing along the surface to be attached of the lower surface of the target member 67, the lower part of the tank 31 passes through the through hole 29 without contacting the water flow (without contacting the inner wall of the partition plate 34 surrounding the through hole 29). It is configured to fall to the side.

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

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

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

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

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

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

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

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

  As described above, in the pressurized container 30 of the present embodiment, the direction of the water flow created by the notch K of the pressurized container 30 is formed downward, the gas-liquid two-phase mixed flow is dropped vertically, and By setting the water flow rate 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). Vortex motion is generated in water while preventing gas from being generated, and gas is dissolved by entraining gas and liquid in the vortex of the vortex motion generated by kinetic energy released by discontinuous change from jet to normal flow under high pressure The air can be dissolved efficiently, and the air is entrained and dissolved in the water, so that when the device with fine bubble generation function is in an undissolved air layer formation mode, a clean air layer A in which splashes do not fly is obtained. it can. As a result, in the present embodiment, the electrode can be appropriately detected without erroneous detection without being splashed with water. Further, in this embodiment, the sound generated when the bubbles are crushed by being swirled in the vortex of the vortex motion is sealed with water, and it is as if it is sound-insulated with water, so that it is possible to quietly dissolve. .

In the present embodiment, one triangular cutout K has a base (length in the circumferential direction of the partition plate 34, W in FIG. 1D) of 3.5 mm and a height (partition plate 34). Is 2 mm, and the area is 3.5 mm ² (base 3.5 mm × height 2 mm / 2 = 3.5 mm ² ), 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), and the total area of the notches is formed to be larger than the cross-sectional area 50 mm ^{2 of the} inlet 32 having a diameter φ8. Hereinafter, a detailed description of each of these specific examples will be described.

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

The water surface collision velocity that minimizes the length of the foam layer is a value larger than 1 where the upstream fluid number, which is the fluid number of the jet (spray water) passing through the notch K, is close to 1 (in order to effectively form a vortex). The fluid number is 1.7 or more, for example, the upstream fluid number when air is mixed is greater than 1 and less than or equal to about 32 (the square of the horizontal axis 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 present embodiment, the distance from the notch K that is the base point of the water flow to the allowable lower end of the stored water is very close, for example, 15 cm, and therefore passes through the notch K that is the base point of the water flow. The number of fluids on the upstream side is obtained using the flow rate to be used and the thickness of the water flow (corresponding to the water depth).

  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 this example, 20 ° C., 1 atmosphere (= 101.3)
kPa), when 700 cc / min (700,000 mm ³ / min) of air is introduced from the air introduction valve 38, the WGO which is the apparent flow velocity of the air becomes maximum. 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 this embodiment, as shown in (Table 1), the cross-sectional area of the notch K (any one of 63, 84, 105, 126 (mm ² )) and water introduced into the pressurized container 30 Depending on the flow rate (5, 5.5, 6, 6.5, or 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 x indicates that the air layer is not formed (undissolved air amount cannot be measured). Indicates. In addition, the inventor of the present application also confirmed that the flow speed of the portion of × is more preferable as the flow speed of only water excluding air passing through the gap formed by the notch K.

As is clear from this (Table 1), when the total area of the notch K is 63 mm ² , 84 mm ² and 105 mm ² , the flow rate of water introduced into the pressurized container is 5.5 to 7 liters / minute. Under the conditions and the condition where the total area of the notches K is 126 mm ^{2 and} the flow rate is 7 liters / minute, an undissolved air layer is not formed. On the other hand, in this embodiment, the flow rate when the total area of the notch K is 126 mm ^{2 and} the flow rate is 5 to 6.5 liters / minute, and the total area of the notch K is 105 mm ² , 84 mm ² , 63 mm ² . Under the condition of 5 liters / minute, an undissolved air layer A is formed.

  That is, the undissolved air layer A is formed according to the conditions of the total area of the notches K formed in the partition plate 34 of the pressurized container 30 and the flow rate of water introduced into the pressurized container 30. You can see whether 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 present 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, the total number of the cutouts K is 84 mm ² and the fluid number is between 7.09 and 7.79). The inventor of the present application estimates the reason why the value varies depending on the total area of the notch K 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.

  Moreover, since the result shown in (Table 1) is a result in the pressurization container 30 of a present Example, it is a numerical value when the inside of the pressurization container 30 is appropriately mirror-finished, for example, a pressurization container Even if the inside of 30 is mirror finished, the finish is rough, the material of the pressurized container 30 is not polycarbonate, or the bathing agent is contained in the water introduced into the pressurized container 30. In addition, 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 comparative example 2 shown in FIG. 26, when the flow rate of water is 7 liters / minute in spite of operating at the same fluid number, the air layer is not used until 1 to 3 minutes from the start of operation. In contrast to formation (the length of the air layer was 0 cm), the air layer formation was changed 4 minutes after the start of operation (the length of the air layer was 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, the description will be difficult to understand if various cases are described in detail. Therefore, in the description of the present embodiment, unless otherwise specified, the boundary fluid number is assumed to be 6.2.

  In the apparatus with a function of generating fine bubbles, such as a bath apparatus to which the pressurized container 30 of the present embodiment is applied, as described above, the amount of undissolved air in the pressurized container 30 is measured, and the pressurized container 30 Is controlled to switch 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 set to “zero”) so that air can be dissolved in water. However, this control program is changed according to the fluid number. Details of this control will be described later.

By the way, in the pressurized container 30 of the present 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 critical flow velocity (critical flow velocity) passing 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 this embodiment, in the specific example in which the total area of the notches K is 126 mm ² , the flow rate when the flow rate of water introduced into the pressurized container 30 is 5 liters / minute, which is the slowest flow rate, is 661 mm / 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 rate of water increases, but the critical flow rate is determined by the thickness h of the water flow, so the total area of the notch K is smaller than 126 mm ^2. In the example, even when the flow rate of water introduced into the pressurized container 30 is 5 liters / minute, the flow rate is as high as 661 mm / second or more, and the critical flow rate is about 140 mm / second. Therefore, in the specific example of the present embodiment, the critical flow velocity of the water flow through the notch K is about 140 mm / sec regardless of the total area of the notch K.

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

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

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

  That is, in the present embodiment, the tank side wall is caused by the water flow flowing down along the attached surface of the inner peripheral wall of the tank 31 and the tank side wall is moved to the lower side, and the tank rises from the lower part of the tank to the water surface side. By colliding with the bubbles to be generated, the speed of the water flow is reduced to become a normal flow, and a jumping phenomenon occurs on the bubbles, thereby preventing the occurrence of a situation in which the water splashes in the air layer A. As a result, in this embodiment, the structure is such that the fluid number does not have 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 of the present embodiment is configured such that water falls on the partition plate 34 fixed in the tank 31, and the member to which water is applied floats on the water in the tank 31. Since there is no special structure, 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.

  Further, in the pressurized container 30 of this embodiment, the flow of water flows as shown in FIG. 1B and is stirred in the tank 31, so that the water flowing from the lower side of the tank 31 to the upper side is It is possible to prevent the electrodes 35, 36, and 137 from hitting. 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 present embodiment, as described above, the examination results of the specific example in which the total area of the notch K is changed will be described with reference to the experimental results shown in FIGS. First, the inventor of the present application sets the flow rate of water introduced into the pressurized container 30 to 6 liters / minute, and the total area of the notches K is 63 mm ² , 84 mm ² , and 105 mm ^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 indicated by x 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 (device with a fine bubble generating function) This is a mode for setting the air layer A to “zero” (air layer non-forming mode)), and is a combination of air inlet valve control for the air layer “zero” in this air layer non-forming mode. is there.

The examination result is shown in FIG. In FIG. 2A, the characteristic line a indicates turbidity when the total area of the notch K is 63 mm ^2, and the characteristic line b indicates 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. 2 etc. is a result of measuring white turbidity using turbidity checker SC-T3 made by 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. 2B 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 , The phenomenon is thought to be due to the occurrence of strong water jump rather than steady water jump.

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 this example, when the upstream fluid number changes from 8.5 to 11.3, the inventors consider the reason why the underwater jumping phenomenon has changed from steady jumping to strong flow jumping. 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.

  20 and FIG. 21, the results of the present example and comparative examples 2 and 3 indicate that the material of the pressurized container 30 is polycarbonate and the inner surface is mirror-finished (for example, polished when a transparent material is used). This is the result of an experiment in which the glass is made of transparent glass instead of glass, and the inside is seen through. FIG. 21 (a) shows an excerpt of the range of N in FIG. 20 (a range including Comparative Example 2 and a general jumping classification such as a river), and FIG. 21 (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.

  Moreover, it is thought that the jumping water classification in the present embodiment also 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 this embodiment is used, as described above, the value of the fluid number at the boundary between 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 according to the upstream fluid number in this embodiment is as shown by the broken line in FIG. It is estimated that the characteristic line i connecting the boundaries of the classification is a jumping phenomenon classification such that the characteristic line i 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 Comparative Example 3 to be described later, a 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. In this way, in the case of the same jumping phenomenon classification, 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. From the experimental results, the boundary between the actual steady water jump and the strong water jump when the pressurized container of the present embodiment is used is not a fluid number of 12.4, but a value between the fluid number of 8.5 and 11.3. Therefore, it is considered that strong jump water is generated with a total area of the notches K of 63 mm ² and a flow rate of 6 liters / minute so that the fluid number becomes 11.3.

The cause of this is considered to be due to the difference in the magnitude of the influence of the water flow when the water flow passes through the notched K and the surface to be attached (in this embodiment, the inner wall of the tank 31). That is, FIGS. 19A and 19B schematically show the shape of the water flow flowing through the notch K along the attached surface of the inner peripheral wall of the tank. As shown, the water flow passes through the notch K and then flows down while bringing the triangular bottom part into contact with the tank inner wall surface, and its shape collapses and the bottom (contact surface) expands. However, the contact surface of the water flow with the surface to be added is a case where the water flow is fast, as can be seen from the comparison between the case where the water flow shown in FIG. 19 (a) is slow and the case where the water flow shown in FIG. 19 (b) is fast. (That is, in the case of a specific example in which the total area of the cutouts K is 63 mm ² in this embodiment), the rate at which the water flow collapses (the contact surface) while flowing down from the cutouts K to the water surface 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.

  It should be noted that the jet (turbulent flow) releases energy to become a laminar flow with a fluid number of 1 or less due to the water jump phenomenon. At this time, the larger the fluid number of the jet (turbulent flow) upstream of the jump water, The amount of released energy becomes large (not proportional to FIG. 2B). 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 indicated by the arrows in the figure 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 present embodiment and the comparative example, as shown in FIG. 42 (c), the water passes from the state where the water passes through the pipe C having no opening. The area where the flow of water touches the inner wall of the cutout is in the same state as the flow of the river as shown in FIG. 42 (a), and then flows as shown in FIGS. 19 (a) and 19 (b). As the shape of the water changes from moment to moment and the shape collapses, the value of the viscosity experienced by the water flow 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 Example and Comparative Example 3 of the present application, the value corresponding to this Reynolds number is considered to be, for example, about 700 to 3000, which is much lower than the Reynolds number of the river flow (tens of thousands to hundreds of thousands or more). It gets 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 this embodiment, it is considered that the relationship between the amount of energy released at the position indicated by the arrow C in FIG. 20 and the number of fluids is true, but in this case, laminar flow occurs due to steady jumping in a general river. Whereas the amount of energy released is 3.5 (4.5-1.0 = 1.5), in this embodiment, the viscosity is larger than the flow of the river (for example, 1.5 to 2) Energy loss is large, and if the flow rate is not increased until the fluid number exceeds 6.2 (if energy is not given to the water flow), the amount of energy released will not be 3.5, and 1.7 (6.2-3 .5-1) is an energy loss lost due to viscosity.

In Comparative Example 3 in which the shape of the notch K is rectangular, the water loss is larger than in the present example in which the shape of the notch K is substantially triangular, so this energy loss is also large, and the point B1 in FIG. As shown, the total area of the cutouts K is 90 mm ² , the flow rate of water introduced into the pressurized container 30 is 7 liters / minute, and even if the fluid number is 10.69, it is vibration jumping water. The energy loss is 6.19 or more (10.69-3.5-1). As described above, when this example and Comparative Example 3 are compared, the configuration in which the rectangular cutout is formed is 3.6 times the energy loss as compared with the configuration in which the substantially triangular cutout K is formed. As described above, it can be seen that if the cutout shape of the present application that does not easily cause water collapse is used, energy loss can be significantly suppressed.

  In FIG. 20, it can be seen that the energy loss of Comparative Example 2 is smaller (almost zero) than that of the present Example, but it is difficult to increase the flow rate itself in Comparative Example 2 because it is difficult to increase the turbidity. It is difficult to increase the degree, and this embodiment is superior as the pressurized container 30 for generating fine bubbles in the bathtub 26. This will be described later.

  As described above, in this embodiment, the fluid number of the jumping water classification becomes a unique classification based on the Reynolds number related to the viscosity of water, and the boundary f between the vibration jumping water and the steady jumping water in the classification is used, The apparatus with a fine bubble generating function to which the pressurized container 30 of the embodiment is applied separates the mode in which the air layer A is formed below the partition plate 34 and the mode in which no air layer is formed. That is, the mode switching control means (see FIG. 7) provided in the apparatus with the fine bubble generating function uses the value of the upstream fluid number, which is the fluid number of the spray water passing through the notch K, for the jump phenomenon classification. By setting the value to be smaller than the boundary fluid number that is the boundary (the boundary between steady and vibrational water jumps, the value is about 6.2), an undissolved air layer formation mode is set, and the upstream fluid number is greater than the boundary fluid number. By setting the value, the air layer non-forming mode is set.

FIG. 4 shows the turbidity, the length of the air layer shown in FIG. 3 (the air length), and the length of the bubble layer in a specific example where the total area of the notches K is 126 mm ² in this embodiment. Regarding (bubble length), the result of examination by changing the flow rate of water introduced into the pressurized container 30 is shown. In FIG. 4, 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. FIG. 5A shows the characteristic lines d, e, and f extracted from FIG. 4, so that in this embodiment, the notch K is introduced into the pressurized container 30 having a total area of 126 mm ^2. The length of the air layer is shown when the flow rate of water 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 As with the characteristic line f in FIG. 5A, the air layer (air layer A) is not formed at any flow rate at liters / minute.

That is, in the specific example of this 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. As shown in the characteristic line a, the pressure vessel having a total area of the notch K of 126 mm ² has a different length of the air layer depending on the flow rate of water introduced into the pressure vessel 30, whereas the notch K in each embodiment the total area is 105mm ^2, 84mm ^2, 63mm ^2, and 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, which have been clarified by the study of the present inventor, are summarized as shown in the following (A) to (D). In addition, in a device with a function of generating fine bubbles, such as a bath device to which a pressurized container is applied, 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 this embodiment, the gap between the notch K and the inner wall of the tank, for example, the height h shown in FIG. 1 (d)) is narrow, fine bubbles are generated in the bathtub 26. In the fine bubble jetting device (see FIG. 9), the dust, hair, etc. that have passed through the small-diameter through-hole of the filter 54 provided in the suction part for sucking in the bath water or the like may be clogged in the gap. 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 considers that the requirement (F) is satisfied in the apparatus with a fine bubble generating function to which the pressurized vessel is applied, and then satisfies the requirements (A) to (D). Before the pressurization container 30 of this embodiment is formed, the pressurization container 30 (Comparative Example 1 and Comparative Example 2) shown in FIGS. 24 and 26 and FIG. The pressurized container 30 (Comparative Example 3) having the partition plate 34 shown in FIG.

  Table 3 shows a list of examination results for this example and Comparative Examples 1 to 3 described below.

  As shown in FIGS. 24A and 24C, the pressurized container 30 of Comparative Example 1 shown in FIG. 24 has substantially the same configuration as the tank 31 and the like in this embodiment. As shown in the cross-sectional view of b), a notch is not formed in the partition plate 34, and a gap with a predetermined set interval is formed between the outer peripheral edge of the partition plate 34 and the inner peripheral wall of the tank 31. S 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 comparative example 1, the diameter of the inner wall of the tank 31 is 45 mm, which is the same as that of the present embodiment, whereas the diameter of the partition plate 34 is 42 mm, and the gap S (the inner wall of the tank and the partition plate 34 The diameter of the gap between the outer periphery and the outer periphery is 1.5 mm, and the area of the gap 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 introduces 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 examining the flow rate of the generated water is 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 comparative example 1, in order to increase the turbidity, in order to increase the flow rate of water through the gap S, the thickness of the water flow must be less than 1.5 mm, that is, the gap S should be less than 1.5 mm. However, since the requirement (C) is no longer satisfied, it has been found that further improvement in performance cannot be expected.

  Next, Comparative Example 2 will be described. As shown in FIGS. 26 (a) and 26 (d), the pressurized container 30 of Comparative Example 2 forms a gap for allowing water to flow from the top to the bottom of the partition plate 34 at the center of the partition plate 34. ing. That is, in the comparative example 2, the 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 is vertically spaced from the plate surface of the partition plate 34 via the gap t. The water to be poured from the injection port 32 falls on the table plate portion 34, passes through the gap t, and is attached to the bottom surface of 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 Comparative Example 2, the water flow thickness was 0.003 m, the flow rate was about 6 liters / minute, the flow rate was 650 mm / second, the critical flow velocity was 171 mm / second, and the fluid number was 3.8 (flow velocity 650 mm / second ÷ limit flow velocity 171 mm / second). Yes, Fluid number / flow velocity = 3.8 / 650 = about 0.0058, limit flow velocity / total area of gap t = 171 / 152.4 = about 1.1.

  For Comparative Example 2, as in Comparative Example 1, the length of the air layer (air length), the length of the foam layer (foam length), and the turbidity shown in FIG. FIG. 27 shows the result of examination by changing the flow rate. 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 Comparative Example 2, the flow of water breaks through the center of the table plate portion 28, and unlike the above-described example and other examples described later and other comparative examples, the water flow is added to the surface to be added over a long distance. They are not dropped. Thus, in Comparative Example 2, it is possible to prevent the occurrence of jumping fluid, so that it is possible to induce a jumping phenomenon below the surface of the water without increasing the rotation speed (water pressure, flow velocity) of the pump. Yes. 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 Comparative Example 2, a sound that strikes the water surface is prevented. Since there is a sufficient surface to be added (the surface to be added B in FIG. 26 (e) and the surface to be attached to the bottom surface of the target member 67 shown in FIG. 36), it is possible to prevent the generation of a sound hitting the water surface. However, the water flow concentrates on one point and falls deeply into the water surface. As a result, the length of the bubble layer-air layer shown in FIG. 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, Comparative Example 3 will be described. The pressurized container 30 of Comparative Example 3 is formed in substantially the same manner as in the present example. In the present example, the substantially triangular notch K is formed in the outer peripheral end of the partition plate 34, whereas in the comparative example. 3, as shown in FIG. 28A, a partition plate 34 in which a rectangular cutout K is formed is applied. Also in FIG. 28, the illustration of the holes at the electrode passage portions is omitted. Further, in this example, the cutouts K are formed in a rectangular shape and arranged at equal intervals, the partition plate 34 has a gear shape, and the cross section of the pressurized container in which the partition plate 34 is disposed in the tank 31. The figure is as shown in FIG.

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

FIG. 29 shows 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 in Comparative Example 3. The result of having examined by changing the flow volume of the water introduced into the pressure vessel 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.

Incidentally, (in Comparative Example 3, the results in the example the total area was 90 mm ² notch K) characteristic curve shown in FIG. 29 and, the total area of the cutout K in the embodiment shown in FIG. 4 of 126 mm ² as can be seen by comparing the characteristic curve for example, resemble the total area of the total area of the notch with the present embodiment of 126 mm ² K notches K are formed in the partition plate 34 and Comparative example 3 of 90 mm ² It was found that the water stirring effect can be improved by making the shape of the notch K into a substantially triangular shape as in this example even at the same water flow rate.

In Comparative Example 3, 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 Comparative Examples 1-3, the maximum value of the fluid number is 10.7, and it is estimated that the fluid number when air is not removed (in the case of air mixing) is larger than this value. Even then, it is considered that the square of the fluid number does not 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 Comparative Example 3, 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 is The ratio of the length of the air layer to the length of the foam layer (air length / bubble length) when the total area of the gap is changed is shown in the characteristic line a, and the turbidity average value is shown in the characteristic line b. Yes. 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, in Comparative Example 3, the total area of the plurality of notches K 90 mm ^2, 120 mm ^2, when a 180 mm ^2, the relationship between the flow rate and flow velocity of the water injected into the tank 31 The results of the study are 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 Comparative Example 3, the flow velocity is the fastest when the total area of the gap between the notch K and the inner wall of the tank is 90 mm ^2. Under these conditions, the water flow thickness is 0.0015 m, the flow rate is approximately 6 liters / minute, and the flow velocity is 1100 mm. / Second, critical flow velocity 121 mm / second, fluid number 9.1 (flow velocity 1100 mm / second ÷ limit flow velocity 121 mm / second), fluid number / flow velocity = 9.1 / 1100 = approximately 0.0082, critical flow velocity / gap The total area of S = 121/90 = about 1.3.

  In Comparative Example 3, in order to further increase the turbidity, in order to increase the flow rate of 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.

  About the comparative examples 1-3 as mentioned above, when it summarizes about the flow rate of the water introduce | transduced in the pressurized container 30, and the aspect of air layer formation or an air layer non-formation, as shown in the following ((Table 9)). Become.

  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 embodiment in which a plurality of notches K are arranged at intervals like each other as in the present example and the comparative example 3, the water passing through the notches K is the bottom of the notch K (tank It is the length in the circumferential direction, and in this embodiment, if it flows down with the same width as the width of W in FIG. 1 (d), the space between the notches K of the partition plate 34 is formed on the inner peripheral wall of the tank. There will be a portion where there is no flow of water at the position corresponding to. However, during the flow of water along the surface to be added on the inner peripheral wall of the tank, for example, in this embodiment, as shown in FIGS. It spreads to the part where there is no (that is, the part where the flow should not be formed). From this, when Comparative Examples 1 to 3 are compared, Comparative Example 3 has a large rate at which the speed of water falls during the flow of water (rate of rate decrease of Comparative Example 2 <rate of rate of decrease of Comparative Example 1) <Speed reduction ratio of Comparative Example 3).

  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. Unless we consider the notch shape to prevent spreading, it was found that the improvement in performance cannot be expected in the study of the comparative example (the improvement in performance cannot be expected in the rectangular shape as in comparative example 3). It came to make the shape of K into a triangle shape.

  In other words, in this 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) (one of the requirements necessary for the pressurized container). (While satisfying the requirement of (C)), it is possible to reduce the water collapse from the part of the flow formed by the notch to the part where the flow should not be formed (one of the requirements for the pressurized container) (The above requirement (B ′) 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.

In the specific example of this embodiment, 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 total area of the gap is 63 mm ² . The fluid number is 11.3 (flow rate 1587 mm / second ÷ limit flow rate 140 mm / second), and the fluid number is 5.7 (flow rate 793 mm / second ÷ limit flow velocity 140 mm / second) when the total gap area is 126 mm ^2. In these cases, 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.

Further, in the specific example of this embodiment, when the total area of the gaps formed by the notches K is 63 mm ² and the flow rate is 7 liters / minute, the fluid number is 13.1. The number is the maximum in each of the above specific examples of the embodiment, but when air is not removed (when air is mixed), it is estimated that the value 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 mentioned above, a present Example can satisfy | fill all the requirements of said (A)-(D) calculated | required by a 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). Although it should be possible to obtain a value (ratio or magnification) for the same limit (boundary between laminar flow and turbulent flow), there is a difference between the comparative example and the example. 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 Comparative Example 3 is 90 mm ² and the total area of the notch K of the present invention is 126 mm ² , the fluid is completely fluid despite showing the same behavior. The number 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 jumping shape classification for muddy river turbulent flow, unpressurized, open to the upper atmosphere, and in the case of a single liquid phase The relationship between the Froude number and the classification of jumping water according to the Froude number is shown. Since this jumping shape classification is a jumping shape classification with a Reynolds number as high as, for example, tens of thousands, Reynolds as described above. On the other hand, it is said that there is no involvement in the number, but in the case of the jump shape classification below a stream such as a few millimeters in the Reynolds number as low as several thousand, as in this embodiment, the involvement in the Reynolds number. Consideration is considered necessary.

  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 wall surface). When the water passes through the notch K as in the present embodiment, the amount of water flowing along the pipe C as shown in FIG. After that, the bottom of the triangle flows along the inner peripheral wall of the tank, and the thickness of the water flow along the surface of the inner peripheral wall of the tank is as thin as 0.002 m, for example. In the case of a strong impact), 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 present embodiment, the wet side is the side of the surface that touches the surface to be added to the inner wall of the tank when the water flow falls (flows down) through the notch K, and the cross-sectional area is a substantially triangular notch. It is the area of 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 present embodiment in which the influence of the viscosity (viscosity) seems to be large (when the Reynolds number is as low as several thousand), for example, as shown in FIG. In addition, the minimum Froude number (generally referred to as 4.5) for steady water jump is considered to be 6.2 or more, for example, 6.5, which is necessary for steady water jump. It is considered that a fluid number of 6.2 that is larger than the minimum energy amount of 4.5 is required (see level 4 in FIGS. 23A and 23B).

  Similarly, vibrational jumping (sometimes translated as shaking jumping) occurs when the upstream fluid number is 2.5 or more in the general case described above, whereas the influence of viscosity is large. In the case of the present embodiment, it is considered that the problem occurs when the upstream fluid number is 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, it is influenced by the influence of viscosity, and it is a vibration jump. However, in this embodiment, it is considered that a weak jump is caused by insufficient energy to reach a vibration jump.

  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 Comparative Example 2 (see FIG. 27, characteristic line f), the air layer is not formed (the length of the air layer is 0 cm) until 1 to 3 minutes from the start of operation. After a minute, it changes to the formation of an air layer (the length of the air layer is 3 cm). As a result of considering this state, at the beginning of the discussion, the bath water was already dissolved by the operation for 3 minutes from the start of operation, and after 4 minutes from the start of operation, the bath water in which the air was already dissolved was removed. From the situation where you are inhaling and trying to dissolve air in that water, if you already have a certain amount of air in the water that you want to inhale after a certain time, it can be dissolved no matter how much you want to dissolve It was thought that an air layer would begin to form (solubility problem).

  However, if it is a problem of solubility, not only Comparative Example 2 but also the examples and other comparative examples have the same situation (the air layer is not formed until a certain time from the start of operation, and the air layer is thereafter However, the same situation is not seen in the examples and other comparative examples. In other words, the results other than Comparative Example 2 indicate that the state in which the air layer is formed immediately after the start of operation and the air layer is formed continues immediately after the start of operation, or the air layer is not immediately after the start of operation. In formation, either that 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, since the situation in Comparative Example 2 (after the start of operation, an air layer is not formed until halfway and an undissolved air layer is formed from the middle) straddles the boundary of the jump shape classification during operation. The present inventor believes that the situation may have changed. More specifically, in Comparative Example 2, the lower surface of the table plate portion 28 is a surface to be joined when water passes, and the influence of gravity and Bernoulli's theorem (precisely, 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, FIG. 20). reference).

  In other words, in Comparative Example 2, after passing along the surface to be attached (see B in FIG. 26 (e)) under the table plate portion 28, the center portion of the tank 31 is passed through the through hole 29. Falls without being attached (falling through the center of the tank without being affected by the effect of the attached surface (the effect of viscosity) is short). Consideration of the situation occurring in Comparative Example 2 (situation in which the air layer is not formed until 1 to 3 minutes from the start of operation and changes to the formation of the air layer after 4 minutes from the start of operation) because the structure reaches the water surface of the water. In this case, it is considered that the jump shape classification shown in FIG. On the other hand, as in Comparative Examples 1 and 3 and the present embodiment, for example, when flowing down a substantially vertical wall surface, there is no mitigating action due to gravity, so a boundary is generated with a fluid number different from the river flow (viscosity It is thought that the fluid number increases due to the influence.

In Comparative Example 2, 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 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, in the configuration of the present embodiment in which the shape of the notch K formed in the partition plate 34 of the pressurized container 30 is substantially triangular, the following description (a) to (c) It can be considered.

(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 present embodiment, it is considered that the boundary between the vibration jump and the steady jump that are said to be formed is formed around a fluid number of 6.14 to 6.24 (about 6.2). 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.

In contrast, a rectangular notch total area 90 mm ² of K of Comparative Example 3, the flow rate of 7 l / min (Froude number 10.69), in the present embodiment, specific examples of the total area 126 mm ² notch K , It will flow down along the surface to be attached, so the effect of viscosity should be the same (the boundary between vibrational jumping and steady jumping is thought to be formed around 6.14-6.24 fluid numbers) However, even with a fluid number of 10.69, the air layer A is still formed (vibrating water jump).

  From this, this example is a pump having a lower flow rate, a lower fluid number, and a lower capacity compared to Comparative Example 3 in which the notch shape is a substantially triangular shape, and the notch shape is a rectangular shape. It can be seen that high turbidity can be expected. 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 this example, when the total area of the notch K is 63 mm ² , 84 mm ² , 105 mm ² (that is, the total area of the notch K is 105 mm ² or less in the specific example of this example), the pressurized container Since the air layer A is formed when the flow rate of water introduced into 30 is 5 liters / minute and the air layer A is not formed at 5.5 liters / minute, the bottom of the triangular notch K is 3.5 mm high. In the case of a notch having a thickness of 2 mm and an area of 3.5 mm ^2, it is considered that water collapse that creates the air layer A occurs while the flow rate decreases from 5.5 liters / minute to 5 liters / minute ( It is thought that there is an “additional viscosity effect”). 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 of this embodiment is applied, the necessary requirements for the apparatus As described in the above (F), the flow rate range (or Froude number range) for creating the air layer A and the flow rate range (or Froude number range) for which the air layer A is not created are used. Control is needed. 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, unlike the comparative example 2, the present embodiment differs from the embodiment in which the water reaches the water surface in the tank 31 without being substantially affected by the viscosity as described above, when the water falls. When falling along the inner wall of the basin, it is greatly affected by the viscosity, so it is better to apply the jump shape classification shown in FIG. It is done.

In the present embodiment, the total area of the cutout K to embodiments of ^{63mm 2, 84mm 2, 105mm 2} , by the control flow rate when not to make an air layer A and 5.5 liter / min or more, The shape of jumping as shown in FIG. 23 (b), which is not so much affected by the “waterfall” caused by the water collapse, but is affected by the viscosity caused by the influence of the tank wall. Classification is considered to apply. Although details will be described later, in the specific example in which the total area of the cutouts K is 126 mm ² in this embodiment, even when the flow rate of water is set to 6.5 liters / minute, it is influenced by further viscosity. In this specific example, since the plurality of notches K are not formed with a large interval, the water collapse is limited, and there is much “influence of further viscosity” that is considered to be caused by the water collapse. Is not considered.

In FIG. 2B, 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.

In this way, in the present 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 , a jumping water (strong water jumping) higher than the steady jumping water is generated. In reality, however, since the flow velocity increases by the apparent flow velocity (WGO) of air, the total amount of gaps in the pressurized vessel of the same size as that of the pressurized vessel 30 of the present embodiment. Even if the area is a little larger than 63 mm ² (even if the total area of the gap is large due to the fact that it is less affected by viscosity due to the increased flow velocity due to WGO), there is a jump (strong flow jump) that exceeds the regular jump. It is thought 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 present 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 considered effective because steady water jump 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 Comparative Example 2 and 10.69 in the case of Comparative Example 3. A larger value is considered to be particularly effective, and when the size of the pressure vessel is set to a size such as a large drum size like a pool, the height direction of the pressure vessel 30 Therefore, it is considered to be particularly effective if the upstream fluid number is increased so that strong water jump occurs.

  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 Comparative Example 3, the shape of the gap is substantially square. Therefore, if the vertical distance (water flow thickness) is set to a fixed value of, for example, 2 mm, the total area of the gap is the bottom of the surface to be added. Proportional to length. In Comparative Example 1, 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) Since it becomes x (base) x (height), it can be regarded as a substantially rectangular shape. In Comparative Example 2, it can be regarded as a substantially rectangular shape with the outer periphery of the table plate portion 28 (excluding the formation portion of the leg portion 65) as the base and the gap t as the height.

  On the other hand, in the case of the present embodiment, the notch K formed in the partition plate 34 has a substantially triangular shape, so that the total area of the gap is proportional to 1/2 of the bottom side of the notch K (triangle area = (From 1/2) x (base) x (height)). That is, when the distance in the vertical direction (the thickness of the water flow) and the base length of the surface to be attached are fixed, in Comparative Examples 1 to 3, the total area of the gap corresponds to the base and height of the substantially square shape, respectively. In the case of the present 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 distance in the vertical direction (water flow thickness) is The total area can be reduced while keeping it large (in other words, in this embodiment, the portion U other than the triangular cutout portion (cutout K) of (a) can be cut out of the water flow path. However, turbidity can be increased because the flow rate can be increased.

Further, in this embodiment, to reduce the total area of the gap (total notch area), by changing the number of substantially triangular shape as described above, the total area was 102mm ² → 84mm ² → 63mm ² However, 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).

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

  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.

  Further, in the present embodiment, the shape of the notch K is formed in a substantially triangular shape, so that water is applied to a portion that is in contact with the interval between the notch K and the adjacent notch K, that is, a portion that is in contact with the flow of the adjacent water flow. It is considered that the interval can be made more effective by having a structure (inclined gap structure) in which the flow rate can be made smaller than in the case of a rectangular cutout. The reason will be described below.

  As described above, in the configuration in which water falls along the inner wall surface of the tank 31 as in the present embodiment and the comparative examples 1 and 3, the influence given to the water from the inner wall surface is considered to be the cause as described above. It is considered that the relationship between the fluid number and the jump shape classification is changed as shown in FIG. 23B affected by the viscosity from the relationship shown in FIG.

  In addition, it is considered that the formation of the air layer A depends on whether the state of the falling water is vibration jumping or steady jumping. Therefore, in this embodiment in which the shape of the notch K is approximately triangular, the fluid number is In the case of the rectangular notch K of Comparative Example 3, it is considered that there is a boundary that affects the formation of the air layer A between 6.14 and 6.24 (about 6.2). 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 this embodiment, it is possible to make the interval more effective by having an inclined gap structure that makes the flow of the water flow main body less susceptible to the influence of viscosity due to water collapse as described above. It is thought that it is possible (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 fluid number of fluid flowing out from the notch K formed in the partition plate 34 (the number of fluids or the number of fluids in the upstream side in the description of the present application unless otherwise specified) is represented by C in FIGS. Although it is the value at the point, it is actually the time until the water reaches the surface of the water 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 addition, as shown in FIG. 19A, the height h (for example, 2 mm) of the water flow is broken as h ₀ → h _A1 → h _A2 → h _A3 . As shown, it is thought that it has collapsed 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. 21B, in this embodiment, if it is not affected by the viscosity accompanying the collapse of the water flow as shown in FIG. 19, the boundary f between the vibration jump and the steady jump is shown. The straight line i passing through the fluid with a fluid number of about 6.2 is considered to be a line connecting the boundary values of the respective jumping water classifications. Should pass. 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 this embodiment, the viscosity passing through the boundary f between the vibration jump and the steady jump. The viscosity passing through the boundary g between the steady jump and the strong flow jump is smaller.

Therefore, in the present embodiment, the boundary g between the steady jump and the strong flow jump 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, a fluid number of 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 of the present embodiment is not a straight line i but a curved line i ′. In addition, it is thought that the boundary movement by such a water collapse and the movement of the line which connects the boundary of the jumping classification accompanying the boundary movement also occur in Comparative Example 3 (Comparative Example 3 is a water collapse more than the present Example. However, in FIG. 22, the movement is not illustrated.

Summarizing the above, for the boundary of the jumping water classification in this 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 at the position of the present embodiment at the boundary g, the flow velocity is considerably faster, for example, twice. In other words, the boundary g between the steady jump and the strong jump in the present embodiment is less than the height h of the water flow because the flow velocity of the water is faster than the boundary f between the vibration jump and the steady jump. The boundary g in this embodiment passes with a fluid number smaller than the fluid number of about 12.4.
(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): If the height h of the water flow is less distorted, the surface of the water is reached in a form that is less than the contact surface between the surface to be added (in this embodiment, the tank inner wall) and the water flow. It means the same.
(5): Since the contact surface is a solid edge, in this embodiment, the boundary g between the steady jump and the strong jump has a larger inertia force of the flow than the boundary f between the vibration jump and the steady jump.
(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 present embodiment shown in FIG. 21 (b) is such that the boundary g between the steady jump and the strong jump jumps, for example, with a fluid number of 11.3 or less, and the vibration jump and the steady jump. As the boundary f passes with a fluid number 6.2 and the boundary e between the wave-like jumping and the vibrating jump passes with a value larger than the fluid number 3.4, the line connecting the boundaries of the jumping classification is an oblique curve i ′. It is thought that it will be shown.

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, the material of the tank 31 and the like in the present embodiment. It appears as a slanted line i ′ of the curve, and changes in the water temperature, bathing agent, etc. occur as a characteristic of use conditions (change in the viscous force of the flow). Therefore, based on the three-dimensional diagram as shown in FIG. 20, if the present embodiment tries to show the appropriate jumping water classification in cross section, the line connecting the boundaries of the jumping water classification is the curve of FIG. 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 example and the comparative example in which the change of the contact surface occurs (including Comparative Example 2 in which the change of the contact surface hardly occurs), the straight line is the inertia of the flow. In order to shift in accordance with a change in force or a change in viscosity, each curve becomes a curve corresponding to the shift. That is, the line connecting the boundaries of the jumping water classification in this 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.

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 in Examples and Comparative Examples and the general water jump classification. In other words, in river jumping research, river banks are not variable, so the river cross-sectional area (water channel width) is fixed. In the examples and comparative examples of the present invention, however, 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 influenced by the viscosity (viscosity), the fluid number is larger than when the fluid is not affected by the viscosity. In a specific example, in an example in which 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 distance between the notches is large. Since there is room for water collapse, it is further affected by viscosity), so even if the fluid number is 9.45, vibration jumping occurs as shown in FIG.

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

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

By the way, by using the boundary movement due to the water collapse space due to the interval between the notches K, for example, in this embodiment, the total area of the notches K is set to 63 mm ² as follows. As described, the white turbidity improving efficiency by the non-air forming mode can be increased.

  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 this embodiment, in FIG. 21B, the perpendicular R ₁ is dropped from the intersection of the curve i ′ and the boundary g ″, and the perpendicular R ₂ is also dropped from the intersection of the curve i ″ and the boundary f ″. In this case, the distance between the two perpendiculars indicates the number of fluids on the upstream side where steady jump occurs, and the distance between the perpendiculars is small (the distance between the perpendiculars is shortened due to boundary movement due to water collapse). The difference between the flow rate of water corresponding to the low rotation speed and the flow rate of water corresponding to the high rotation speed is only 1 liter / minute, and the difference between the low rotation speed and the high rotation speed of the circulation pump 21 is small. Since the switching time can be short and there is no (or small) change in sound quality associated with switching of the rotation speed of the circulation pump 21, 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 in the specific example of this embodiment, but the movement starts from around the case of the total area 105 mm ² of the notch K. In the case where the total area of the notches K is 63 mm ² , as described above, it becomes larger, improving the stirring efficiency in the air layer non-formation mode and exhibiting the effect of improving turbidity.

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, if the distance between the cutouts K is 35% to 400% of the base (for example, the wetted side can be expanded to 135% to 500%), the mode is switched to “boundary movement due to water collapse”. It was found that it can be used. 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 notch K is formed as in this embodiment, the distance between the notch and the notch does not exceed 1.21 mm. As shown by the broken characteristic line c, 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 considered to be 6.2, for example. .

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 pressurized container 30 is Φ45 mm, the distance between the notches K is the same as that of the specific example of this embodiment. Therefore, in this example, the boundary f between the vibration jump and the steady jump is considered to have a fluid number of 9.9 (between 9.45 and 10.39), for example.

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.

  Further, when the pressurized container 30 is enlarged, for example, as shown in FIG. 36, it is arranged in a plurality of linear standing directions inside a container (tank) 31 such as a drum can (vertical direction). The attached surface forming plate 134 (extended to the above) is provided, and this attached surface forming plate 134 is used as the attached surface (in place of the attached surface of the tank inner wall in the above embodiment), so that the size can be increased efficiently. Can be In this case, as shown in FIG. 36A, the partition plate 34 is provided with substantially rectangular (for example, rhombus-shaped) through-holes 140 as water passage portions through which water flows down from above the partition plate 34. A plurality of the attached surface forming plates 134 that are formed at intervals 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, in the above embodiment, the partition plate 34 is formed with the triangular cutout K, and the water flow that has passed through the cutout K flows down with the bottom of the triangle attached to the inner wall surface of the tank. 36A, the water flow that has passed through the substantially quadrangular through-hole 140 is divided by the diagonal lines, and each has a triangular shape. 134 flows down along one side of 134, and the other triangular water flow flows down along the other side of partition plate 134 (the surface on the opposite side of the surface where one of the triangular water flows follows). To come.

  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.

  Next, a system configuration example of a bath apparatus to which the pressurized container 30 of the present embodiment is applied will be described. This bath apparatus is applied as an embodiment of the apparatus with a fine bubble generating function according to the present invention, and has the system configuration shown in FIG. 6. This bath apparatus has a hot water supply operation function and a bath 26. It has an operation function of automatic operation including hot water filling, a reheating function of bathtub water, and a function of generating fine bubbles in the water in the bathtub 26.

  This bath apparatus is an outdoor bath water heater provided with a reheating burner 16 and a hot water supply burner 10 having three combustion surfaces in an appliance case 27, and hot water supply heat exchange is performed above the hot water supply burner 10. On the upper side of the reheating burner 16, reheating heat exchangers 15 (15a, 15b) for reheating the bath water are respectively provided. Gas is used as fuel for the burners 10 and 16 in this bath apparatus, and air for combustion 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.

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

  The recirculation circuit 25 is provided with a running water switch 22, a water level sensor 20, and an air introduction valve 38 for introducing air into the recirculation circuit 25 on the suction side (that is, the return pipe 23) of the circulation pump 21. The circulation pump 21 pressurizes and dissolves the air introduced from the outside through the air introduction valve 38 in the bath water circulated by driving the circulation pump 21 and discharges the water. The air introduction valve 38, the circulation pump 21, and the pressurization container 30 can also be provided in the instrument case 27.

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

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

  In this way, in the system configuration for generating fine bubbles in the water in the bathtub 26, the pressurized container 30 of the present embodiment is provided on the downstream side of the circulation pump 21 formed by the cascade pump, and further replenished downstream thereof. By providing the heat exchanger 15, the following effects can be obtained.

  That is, in the water sucked in by the circulation pump 21, the air is dissolved by driving the circulation pump 21, but it is not sufficient, and the undissolved air is contained in the water in the form of bubbles. When the water in this state is introduced into the reheating heat exchanger 15 made of copper, rust (gas-liquid two-phase flow accelerated corrosion) and cracks (flow caused by the gas-liquid two-phase flow) occur in the reheating heat exchanger 15. There is a possibility that a force elastic vibration stress corrosion cracking) occurs. On the other hand, by providing the pressurized container 30 of the present embodiment on the downstream side of the circulation pump 21, a state where additional air is dissolved in the water and the air is sufficiently absorbed in the water (bubbles of undissolved air) If the water is introduced into the reheating heat exchanger 15 in a state that does not include the rust, the problem of rusting in the reheating heat exchanger 15 can be prevented.

  It should be noted that 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 and the piping, the circulation pump 21, and the impeller of the circulation pump 21. Up to now, in order to prevent rust and cracking due to gas-liquid two-phase flow, a configuration using a resin pipe such as a soft cross-linked polyethylene pipe or PPS (polyphenylene sulfide resin) and a resin member is used.

  In the bath apparatus having the configuration shown in FIG. 6, 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. It is installed. In FIG. 6, 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 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. 6, but a bath remote control device and a kitchen remote control device are signal-connected to the control device 3. In this bath apparatus, the operation of the hot water supply function is started by opening a hot water tap (not shown) provided at the hot water supply destination from the hot water supply pipe 11 with the operation switch of the bath remote control apparatus or the kitchen remote control apparatus turned on. Is done. This operation is controlled by a combustion control unit (not shown) in the control device 3 based on the incoming water temperature by the incoming water temperature sensor 6 and the amount of hot water supplied by the flow rate sensor 4. The hot water supply burner 10 is burned so that the (hot water temperature) becomes the hot water supply set temperature.

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

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

  Further, the control device 3 has the fine bubble generation control configuration shown in FIG. 7, and the fine bubble generation control configuration includes mode switching control means 40, pump drive control means 41, and 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 at the same time, water is reheated and heated in the heat exchanger 15, but when a liquid in which a large amount of air is dissolved is heated, Since the solubility is lowered, nitrogen in the dissolved air is replenished, and bubbles are re-formed in the pipes after the heat exchanger 15, which are rusted (gas-liquid two-phase flow accelerated corrosion) and cracked (gas-liquid May cause hydroelastic vibration stress corrosion cracking due to two-phase flow). In this bath apparatus, when the fine bubble jetting device 39 ejects into the bathtub 26, the pressure is reduced to generate fine bubbles in the bathtub 26. That is, the pressure between the circulation pump 21 and the fine bubble jetting device 39 is high. A reheating heat exchanger 15 made of copper is provided in the part, and 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 is heated. In this case, the re-formation of bubbles is prevented by controlling the flow rate corresponding on-off valve 48 by the pump drive control means 41 as will be described later. 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 preset rotational speed, so that an air layer is not formed in the tank 31 of the pressurized container 30 of this embodiment. The function of the air layer non-formation mode in which water is vigorously stirred and the undissolved air that forms 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 of the layer formation mode 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 this example and the pressurized containers 30 of Comparative Examples 1 and 3, the fluid number is equal to or less than the boundary fluid number corresponding to 6.2 (usually around 4.5 fluid numbers as shown in Comparative Example 2). The formation operation of the air layer A that occurs only in the case of () is an operation during the operation of the function of the undissolved air layer formation mode. In contrast, the number of Froude boundary effect of further viscosity when the Froude number of 6.2 equivalent greater than the number of boundary Froude (total area of the cutout K 63mm ^2, 84mm ² is greater than about 6.2 (When the influence is corrected, the value is larger than the fluid number 6.2) In the pressurized container 30, the air layer A is not formed and the undissolved air layer is formed when the air layer non-forming mode function is operated. The air that formed the air layer A during the operation of the mode function is finely crushed by the momentum of stirring (by the bath water introduced vigorously at a high pressure) and dissolved in the bath water in the tank 31.

  Normally, when the transition from vibrational jumping to steady jumping that occurs near the fluid number of 4.5, as described above, in the present embodiment where the Reynolds number is low, the viscosity that tends to inhibit inertial force is used. The effect (viscosity) of the fluid increases and the number of fluids where steady jumping occurs increases. For example, it is considered that steady jumping occurs in a region larger than the fluid number equivalent to 6.2. In the pressurized container 30 having an air pressure larger than 6.2, the air layer A is not formed and the air is finely crushed with stirring and dissolved in the bath water in the tank 31 when the air layer non-forming mode function is operated. It will be done.

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, based on the flow rate at which the undissolved air amount can be measured (impact boundary in the case of the pressurized container 30 of the present embodiment, the boundary between the vibration jump and the steady jump), the undissolved air layer formation mode operation and the air layer non- An example of forming mode operation will be described. In this embodiment, the device with the fine bubble generation function measures the amount of air while performing air dissolution in the undissolved air layer formation mode (air dissolution by vibration jumping water), and interweaves the air layer non-formation mode. In the layer non-formation mode, air dissolution much higher than that in the undissolved air layer formation mode is performed. 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. 8 shows an example of the rotational speed control of the circulation pump 21 in association with the mode switching. The rotational speed of the circulation pump 21 during the operation of the air layer non-forming mode function is Hi, and an undissolved air layer is formed. The number of rotations of the circulation pump 21 during operation of the mode function is indicated by Lo. In this example, the pump drive control means 41 performs the function operation in the undissolved air layer formation mode for 6 seconds, then performs the function operation in the air layer non-formation mode for 30 seconds, and repeats this switching operation. ing. When the function of the undissolved air layer formation mode is operated, the water level detection operation in the pressurized container 30 by the electrodes 35 and 36 is performed.

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

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

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

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

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

  In a device with a function of generating fine bubbles, such as a bath device to which the pressurized container 30 of the present embodiment is applied, the flow rate corresponding on-off valve 48 is in a closed state (at the time of fine bubble ejection operation) at a set rotation speed for air layer formation. Although the combustion of the reheating burner 16 is stopped at (2000 rpm), in the undissolved air layer formation mode, the circulation in the reheating operation when the flow rate corresponding on-off valve 48 is opened (at the time of fine bubble non-ejection operation) When the rotational speed of the circulation pump 21 is increased by 300 rpm from the rotational speed of the pump 21, which is 1700 rpm, the 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 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 invention, 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 said Example, although the introduction of the air to the pressurization container 30 was performed using the circulation pump 21 becoming a negative pressure, it shows, for example in FIG. 39, without using the negative pressure of this circulation pump 21. The system configuration is formed, the air pump 121 is combined with the air introduction valve 38, the air is sent from the discharge side of the circulation pump 21, and the air is sent to the pressurized container 30 by the water flow driven by the circulation pump 21. It is good. In such a configuration, the water level detection means may be omitted even when the amount of air fed in can be controlled.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  In the bath apparatus to which the pressurized container 30 of the present embodiment is applied, the amount of air introduced during the water circulation in the recirculation circuit 25 is 5.5 to 7 liters / minute is about 400 cc / minute to 700 cc / minute (1 atm). At the time of conversion). The control at 6 to 7 liters / minute is considered with allowance for fluctuations in the piping distance and the like, but the above-mentioned 5.5 liters / minute is applied to the filter 54 attached to the suction side of the fine bubble ejection device 39. It is a margin for clogging. In FIG. 12, when water is introduced from the pouring channel 14 as indicated by an arrow B in the figure, this water is introduced into the passage 64 and dropped into the bathtub 26 through the recirculation circuit 25.

  In FIGS. 14 to 17, an example of the operation of generating and replenishing fine bubbles in the bath apparatus is shown by a flowchart. Hereinafter, based on this flowchart, the bath to which the pressurized container 30 of the present embodiment is applied. The operation of the apparatus 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. 8, 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. 8, after the level of the water stored in the tank 31 is confirmed by the electrodes 35, 36, etc., the pump speed is changed from the set speed for air layer formation (2000 rpm) to no air layer formation. After changing to the mode setting speed (3500 rpm), the air introduction valve 38 is normally opened and closed (on / off) after a predetermined delay time (for example, 3 seconds). The delay time is lengthened (added) or shortened (subtracted) as shown in the operation diagram of (the flowchart in the case where the electrode is composed of two electrodes, the water level electrode 35 and the ground electrode). You may do it. That is, the opening / closing control may be performed so as to control the delay amount of the timing for opening the air introduction valve 38.

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

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

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

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

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

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

  In addition, this invention is not limited to the said Example, It sets suitably. For example, in the embodiment, the water inlet 32 is formed downward, but may be formed upward as shown in FIG. 35, for example, and the angle of the water inlet 32 is appropriately set. .

  The material of the pressurized container 30 is preferably a material with low water resistance, but may be PPS (polyphenylene sulfide) or the like in addition to polycarbonate. The finish should be commensurate. 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 pressurized container 30 of the embodiment is used. In the case of such a 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 Since the value changes depending on the ambient temperature, water temperature, presence / absence of bathing agent, atmospheric pressure, etc. of the container 30, when the mode switching control means 40 switches between the undissolved air layer formation mode and the air layer non-formation mode, the change It is preferable to perform control so that the mode is switched with a value corresponding to the use environment following the set value.

  Furthermore, in the apparatus with a fine bubble generating function, when the water flow is introduced into the pressurized container 30 in the undissolved air layer formation mode, it is not necessary to make the water flow a jet flow, and a normal flow may be used.

Furthermore, the kinematic viscosity coefficient decreases as the temperature increases 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, in the apparatus with the fine bubble generating function, the mode switching control means 40 is configured so that the undissolved air layer formation mode is greater in the air layer non-formation mode while chasing than in the air layer non-formation mode without chasing. You may increase the timing of putting.

  Furthermore, in the bath apparatus to which the pressurized container 30 of the above embodiment is applied, the air introduction valve opening / closing control means 42 controls the air introduction valve 38 as shown in FIG. At the start), the air introduction valve 38 may be kept closed until the delay time elapses after the pump rotation is set to Hi, or 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. .

  In addition, as in the pressurized container 30 of the above-described embodiment, 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 ends of the bubbles extending on the water or the water surface are the electrodes 35 and 36). , 137), it is impossible to obtain detailed information such as whether water is in the tank up to the eighth minute or the sixth minute. 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, in a device with a function of generating fine bubbles, such as a bath device, the upper end of the bubble spreading on the water or the water surface is slightly changed by changing the on / off timing of the air introduction valve 38, the opening time of the air introduction valve 38, the opening degree, etc. You should control whether you are touching 35, 36, 137 or much lower.

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

  Further, particularly in winter, when the temperature of the air introduced from the air introduction valve 38 is low (eg, 0 ° C.) and the temperature difference between the air temperature and the bath water temperature (eg, 40 ° C.) is large, ), The temperature of the bath water decreases, and if the 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. 6, but is not affected by the air temperature sucked from the air introduction valve 38 (the heat exchange side and the heat exchange side). It may be the position on the bathtub side (the opposite side).

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

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

  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. 6 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. Further, air may be provided directly in the pressurized container 30 to introduce air into the pressurized container 30.

  Furthermore, in the apparatus with the fine bubble generating function, the jumping phenomenon classification formed in the water flow in the pressurized container 30 when the mode switching control means 40 is used is not changed, but the jet is used exclusively in the air layer non-formation mode. In the case where the air is dissolved and the measurement of the amount of the air layer is mainly performed without dissolving the air in the undissolved air layer formation mode, the water flow in the undissolved air layer formation mode may be a normal flow. 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, the pressurized container 30 may dissolve the air only in the basic undissolved air layer forming mode without using the mode switching control means in the apparatus for introducing water into the pressurized container 30. In this case, it is needless to say that air must be dissolved using a jet in the undissolved air layer formation mode.

  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 of the boundary fluid number between the water jump and the steady water jump is given to the learning mode control means of the mode switching control means 40 in advance. 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, the total area of the cutout K the case of the specific example of 126 mm ^2, 105 mm ^2, following the flow of water to be introduced into the pressure vessel 30 by driving the circulation pump 21 (A) to 3 in (c) By storing each flow rate, and storing the number of rotations of the circulation pump 21 for each flow rate (pump rotation number), the relationship between the flow rate of water introduced into the pressurized container 30 and the number of rotations of the pump is obtained. , 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 cloudy switch on the remote control, the bath apparatus first drives the circulation pump 21 so that the flow rate of water is 5 liters / minute, which is smaller than the flow rate of (a) ( Each part (in the pipe) is filled with water (at a flow rate that causes water collapse to create the air layer A). Thereafter, the number of revolutions of the circulation pump 21 is gradually increased, and the water level in the pressurized container 30 is detected by the electrodes 35, 36, and 137, and the flow rate of water and the number of revolutions of the pump when there is no air layer are measured. And memorize (referred to as flow rate Q _a and rotational speed R _a ).

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

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

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

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

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

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

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

In the case of the embodiment, although the basic hydraulic jump classification of FIG. 23 (b), the total area of the notches total area notch Specific examples of 84 mm ² K of K is in the specific example of 63 mm ² is Due to the boundary movement due to the room for water collapse, the fluid number at the boundary between the vibration jump and the steady jump is larger than 6.2. 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 the specific example in which the total area of the notches K is 63 mm ² , the boundary between the undissolved air layer formation mode and the air layer non-formation mode (the air layer A is The flow rate of the boundary between the formed region and the non-formed region) 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 provisional value of the flow rate of water at the boundary between and the 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 above-mentioned embodiment is 63 mm ² , strong water jump occurs with a fluid number of 11.3 (initial value of the boundary fluid number between steady and strong water jump). Since the flow rate of water at this time is 6 liters / minute, the boundary flow rate between the vibration jump and the steady jump (about 5.6 L / min) and the steady and strong jump water The difference from the flow rate 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 is 126 mm ² in the above-described embodiment, the flow rate of water at which the undissolved air layer is not formed in the pressurized container 30 (water at the boundary between the vibration jump and the steady jump) If the flow rate of water is increased within a predetermined allowable range, the boundary of the next jumping classification (boundary between normal jumping and strong jumping water) is not exceeded. 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 measurement is possible and impossible, but in the specific example in which the total area of the notch K in the above embodiment is 63 mm ² Thus, if the water flow rate is increased within the allowable range and the boundary of the next jumping water classification can be exceeded, the water flow rate during operation in the non-air layer formation mode is ()) Using the initial value of the boundary fluid number of the water jump classification , 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 tank shape of the pressurized container 30 of the above embodiment uses the boundary between the vibration jumping and the steady jumping water, and the water at the boundary between the undissolved air layer formation mode and the air layer non-formation mode. This is a calculation example for obtaining the flow rate, but the boundary of jumping water includes the boundary of wave jump and weak jump water, the boundary of weak jump and vibration jump, and the boundary of steady jump and strong jump water. Determine the appropriate boundary flow rate according to 30 tank shapes, materials, inner surface treatment, etc., and determine the number of revolutions of the pump in undissolved air layer formation mode operation and air layer non-formation mode operation based on the boundary flow rate. You may drive. 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, 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 made flat. However, the attached surface is not always a gentle arcuate curved surface or plane. Rather, it is set appropriately. That is, the surface to be attached may be a curved surface having a small radius of curvature (larger curvature) of an arcuate curved surface, or the bottom portion B of FIGS. 37 (n), (0), (p), and (q). It may be a bent surface having a bent portion that protrudes outward, for example, and is formed so that various substantially triangular water flows as shown in FIG. 37 flow down along the surface to be added. That's fine.

  For example, a cylindrical pipe made of vinyl chloride or the like is arranged in a container (tank) 31 such as a drum can as shown in FIG. 36A, and for example, as shown in FIG. The inner wall surface is the surface to be attached (the pipe wall of the pipe 136 is a curved surface to be added), and as shown by the dots in FIG. The pipes 136 are fixed by filling the gaps, and a partition plate 34 in which a plurality of water passage portions of the hexagonal through holes 140 are formed is placed on the pipe 136, and the water flow that has exited the hexagonal through holes 140 is placed. May have a substantially triangular cross section and flow down the surface to be added. 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.

  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 above embodiment, there was a boundary between the vibration jump and the steady jump with or without an air layer (undissolved air layer A). The boundary with and without air layer moves between them, and if the container is enlarged, the boundary with and without air layer is considered to move between steady jump and strong water jump. 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, the pressurized container of the present invention is appropriately applied to various devices having a function of generating fine bubbles, such as a bath apparatus having a configuration for generating fine bubbles similar to the above-described embodiment. When a device with a function is used as a bath device, the bath device may be a bath device with only a reheating function that replenishes water supplied to the bathtub, or a heating function or a solar heat collecting function. Other functions may be provided. 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.

  Furthermore, the pressurized container of the present invention is not necessarily applied to a bath apparatus. For example, as shown in FIG. 40, an inlet side pipe 111 for introducing water into the pressurized container 30 is connected to a water supply source 110 to add water. An apparatus having a system configuration in which an outlet side passage 112 for leading water from the pressure vessel 30 is connected to a water tank 113 and an air inlet valve 38 and a pump 114 are provided in an 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, although the fine bubble ejection device is provided at the connection portion between the bathtub 26 and the recirculation circuit 25 in the bath device shown in FIG. 6, for example, it is connected to the outlet side of the pressurized container 30 such as being provided in the outgoing tube 24. You may provide a fine bubble ejection apparatus in the outlet side pipe line.

  In the present invention, for example, hot water or water in a water tank such as a bathtub or a pool can be made cloudy and comfortable, or the algae and the like can be easily removed. It can be used as a pressurized container for dissolving air in water for generating fine bubbles, such as a bath apparatus or a pool having a fine bubble generating function provided in various places such as an accommodation facility, and the fine bubble generating function of the present invention The attached device can be applied as a device with various fine bubble generating functions for generating fine bubbles in a household or commercial bath device, a pool, a pond or the like by applying the pressurized container.

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 (11)

An inlet for pouring the water containing air into the tank is formed in the upper part of the tank into which water containing air is introduced under pressure, and a water outlet is formed on the lower end side of the tank, Further, a partition plate for vertically partitioning the inside of the tank with a gap is provided below the inlet, and the partition plate has a water passage portion through which water passes from above or below the partition plate. A plurality of through holes are provided, and the shape of the notches or through holes is substantially triangular in cross section in a direction perpendicular to the flow direction of water passing through the water passing portions of the notches or through holes. The surface to be added is formed in the vertical direction of the tank below the partition plate, and the water poured from the inlet passes through the water passage part. direction of the cross-sectional shape perpendicular to the water flow direction Wherein the cross section substantially triangular water flow forms a substantially triangular water flow the substantially triangular bottom portion is brought into contact with the添面 to flow down to the lower side of the tank along the target添面the water passing portion and the添面is formed, the water is said by being stored while being agitated flows down along the target添面, non dissolved air in the tank to the water is dissolved pressure, characterized in Tei Rukoto form a structure in which an air layer of non-dissolved air in the tank is formed between the water surface and the partition plate lower surface of the water stored in the lower side of the partition plate with Pressure vessel.   The water passage portion has a plurality of substantially triangular cutouts formed in the outer peripheral edge portion of the partition plate at intervals in the outer peripheral direction of the partition plate, and each notch is in the circumferential direction of the partition plate The diameter of the notch is reduced in the direction toward the center of the partition plate, the opening of the notch is close to the inner peripheral wall of the tank, and the inner peripheral wall of the tank forms a surface to which water is added. 2. The process according to claim 1, wherein, after passing through the notch, the tank is dropped to the lower side of the tank along the surface to be added of the inner peripheral wall of the tank and stored while being stirred. Pressure vessel.   The water passage portion has a substantially triangular cutout or through-hole, and a notch or through-hole formation region has a surface-attached plate extending at least on the lower side of the partition plate in the vertical direction of the tank. The attached surface forming plate disposed in the through hole formation region is aligned with the bottom portion of the substantially triangular shape at the upper end side, and is disposed in the notch formation region. The top surface of the accessory surface forming plate is aligned with the opening of the notch, and the water that has passed through the water passage portion falls along the target surface of the target surface forming plate to the lower side of the tank and stirs. The pressurized container according to claim 1 or 2, wherein the pressurized container is configured to be stored while being stored. As a manner of water passing portion of the cutout or through hole to be添面forming plate which is Shin設forming region in the vertical direction of the tank of dividing said notch or said through-hole into a plurality of substantially triangular It is disposed, and stirred to fall the divided respective substantially triangular cross section of the water stream passing through each of the water passage portion along the target添面of the object添面forming plate in the lower part of the tank The pressurized container according to claim 1, wherein the pressurized container is stored while being stored.   A configuration comprising the pressurized container according to any one of claims 1 to 4, wherein an inlet side pipe connected to a water supply unit is connected to a water introduction side of the pressurized container. And an outlet side pipe connected to a water tank is connected to the outlet side of the water from the pressurized container, and an air introduction valve and a pump are interposed in the inlet side pipe. The pump feeds water to the pressurized container side when the air introduction valve is closed, and introduces water and the air introduction valve from the outside to the inlet side pipe when the air introduction valve is open. The compressed air is 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 used as water in the pressurized container. The undissolved air that was dissolved and could not be dissolved in the water in the pressurized container was separated, and the air layer of the undissolved air was separated from the tank. A function of an undissolved air layer formation mode formed inside, and a function of an air layer non-formation mode in which water in the tank is vigorously stirred so that an air layer of undissolved air is not formed in the tank of the pressurized container. And mode switching control means for switching and controlling the air layer non-forming mode and the undissolved air layer forming mode by controlling the number of revolutions of the pump, and the inside of the outlet side pipe or the outlet side pipe Fine water jetted into the water in the water tank by jetting the water in which the air is dissolved provided in the connection with the water tank into the water in the outlet pipe or the water in the water tank A device with a function of generating fine bubbles, comprising a bubble jetting device.   The pressurization container has a capacity corresponding to the capacity of the pressurization container, the flow rate of water introduced into the pressurization container, and the total area of the water passage portion formed in the partition plate in the pressurization container. It is assumed that the value of the upstream fluid number, which is the fluid number of the flowing water passing through the water passage portion, changes, and the mode switching control means uses the value of the upstream fluid number of the pressurized container as the boundary of the jumping phenomenon classification. 6. The fine structure according to claim 5, wherein an undissolved air layer formation mode is set by setting a value smaller than the boundary fluid number, and an air layer non-formation mode is set by setting the fluid number to a value equal to or greater than the boundary fluid number. Device with bubble generation function.   7. The apparatus with fine bubble generating function according to claim 6, 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 that does not form a layer 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 fluid number is detected, and based on the amount of deviation Learning mode control means for detecting a target fluid number is provided, and the mode switching control means introduces the upstream fluid number into the pressurized container so that the value is smaller than the target fluid number obtained by the learning mode control means. The water to be introduced into the pressurized container so that the upstream fluid number is equal to or greater than the target fluid number by controlling the water flow rate to form the undissolved air layer formation mode. Fine bubble generating function apparatus according to claim 7, characterized in that an air layer non-forming mode by controlling the flow rate.   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. 9. The apparatus with a fine bubble generating function according to claim 7, 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 detects the water level of the stored water stored below the partition plate, and the volume of the air layer of undissolved air formed between the water surface of the stored water and the lower surface of the partition plate. water level detecting means for determining the magnitude is provided, air inlet side passage from the outside by opening the air inlet valve when the detection level based on a detection result of said water level detecting means exceeds a set high standards water level To increase the volume of the air layer of undissolved air between the water surface of the stored water and the upper end of the container by sending the air together with water to the pressurized container by the pump, and the water level of the stored water set high standards water level and below, the when the detected water level is lower than the set low reference level sends water by said pump by closing the air inlet valve in the pressurized vessel, the air layer of the non dissolved air in the water By dissolving the air 6. An air introduction valve opening / closing control means for performing opening / closing control of the air introduction valve so as to reduce the volume of the air layer so that the water level of the stored water is equal to or higher than a set low reference water level. The apparatus with a fine bubble generating function according to claim 9.   The water tank is formed by 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 has a reheating heat exchanger for reheating the bathtub water. A recirculation circuit is formed having the reheating heat exchanger, the outlet line, and the inlet line, and the bath water is supplied to the inlet line by driving a pump. 11. The bath device having a function of passing through the pressure vessel and the outlet side conduit in order and returning to the bathtub and circulating the recirculation circuit. A device with a function of generating fine bubbles as described in 1.

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