JP2009018118A - Microbubble generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microbubble generator capable of finishing an air introduction step for a short time. <P>SOLUTION: This microbubble generator is provided with a tank, an air introduction passage, a valve for opening/closing the air introduction passage, a bathtub water supply passage having an upstream end connected to the tank and a downstream end connectable to the bathtub, a decompression nozzle, a tank water supply passage having an upstream end connectable to a water supply source and a downstream end connected to the tank, a first pump for sending water in the tank water supply passage, a tank drainage passage having an upstream end connected to the tank and a downstream end connectable to a drainage destination, a second pump for sending water in the tank drainage passage, and a control device. The control device executes a step for opening an air valve, actuating the second pump, discharging water in the tank and introducing air in the tank; and a step for closing the air valve, actuating the first pump and supplying water to the inside of the tank. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for supplying pressurized water dissolving air to a bathtub and generating fine bubbles obtained from the dissolved air in the bathtub.

  2. Description of the Related Art A fine bubble generator that generates fine bubbles in a bathtub is known. Patent Document 1 discloses a microbubble generator according to the prior art. The fine bubble generating device includes a tank, a circulation water channel, an air introduction channel, and a control device. The circulating water channel includes a tank water channel and a bathtub water channel. The tank water supply channel has an upstream end connected to the bathtub and a downstream end connected to the tank. A pump for sending water in the tank water supply channel to the downstream side is interposed in the tank water supply channel. The bathtub water supply channel has an upstream end connected to the tank and a downstream end connected to the bathtub. A decompression nozzle (a jet nozzle) is installed at the connection between the bathtub water supply channel and the bathtub. An air valve that opens and closes the air introduction path is interposed in the air introduction path. The control device controls the pump and the air valve.

This microbubble generator generates microbubbles in the tub by supplying pressurized water that dissolves air to the tub in which water is stored (that is, generates microbubbles in the water in the tub) )
When using this microbubble generator, the air valve is first opened. Then, the water in the tank flows into the bathtub water supply channel by its own weight. The water that flows into the bathtub water supply channel flows into the bathtub through the pressure reducing nozzle. That is, the water in the tank is discharged to the bathtub. This lowers the water level in the tank. When the water level in the tank drops, air is introduced into the tank through the air introduction path (air introduction step).
When air is introduced into the tank, the air valve is closed and the pump is activated. Then, the water in the bathtub is supplied into the tank through the tank water supply channel. That is, water is discharged from the tank water supply channel into the tank. At this time, the water pressurized by the pump is discharged into the tank vigorously. The water discharged into the tank flows into the bathtub through the bathtub water supply channel and the pressure reducing nozzle. However, since the water flow resistance of the decompression nozzle is high, the amount of water flowing into the bathtub is small compared to the amount of water released into the tank from the tank water supply channel. Therefore, the pressure in the tank increases. If the pressure in the tank rises, the water released into the tank will fly in the tank or when the released water collides with the surface of the water stored in the tank. Air dissolves. Water in which air is dissolved in the tank (hereinafter referred to as air-dissolved pressurized water) flows into the bathtub through the bathtub water supply channel and the pressure reducing nozzle. That is, air-dissolved pressurized water is supplied to the bathtub (water supply step). The air-dissolved pressurized water that has flowed into the bathtub is rapidly decompressed when it passes through the decompression nozzle. Then, the air dissolved in the water becomes fine bubbles. That is, a large amount of fine bubbles are generated in the bathtub. When fine bubbles are generated in the bathtub, the water in the bathtub becomes cloudy.
As described above, since the flow resistance of the pressure reducing nozzle is high, the amount of water flowing into the bathtub is smaller than the amount of water discharged from the tank water channel into the tank. Therefore, in the water supply step, the water level in the tank gradually rises. When the water level in the tank rises to a level close to full water, there is almost no air in the tank. Therefore, it becomes impossible to dissolve air in the water in the tank. Therefore, the control device executes the air introduction step again when the water level in the tank rises to a predetermined water level. By repeatedly executing the air introduction step and the water supply step alternately, fine bubbles can be intermittently generated in the bathtub.

JP 2001-170618 A

As described above, in the conventional microbubble generator, the water in the tank is discharged into the bathtub by the weight of the water in the air introduction step. Since the water in the tank is discharged by its own weight, it takes time to lower the water level in the tank. That is, a long time is required for the air introduction step.
During execution of the air introduction step, fine bubbles are not generated in the bathtub. The fine bubbles in the bathtub disappear with time. Therefore, when the air introduction step is long (that is, when the period during which fine bubbles are not generated in the bathtub is long), the fine bubbles in the bathtub are almost disappeared. Therefore, the water in the bathtub cannot be maintained in a cloudy state. That is, the conventional fine bubble generating device has a problem that the air introduction step takes time, and thus the water in the bathtub cannot be maintained in a cloudy state.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fine bubble generating device capable of completing the air introduction step in a short time.

The fine bubble generating apparatus of the present invention supplies pressurized water dissolving air to the bathtub, and generates fine bubbles obtained from the dissolved air in the bathtub. The fine bubble generating apparatus includes a tank, an air introduction path, an air valve, a bathtub water supply path, a pressure reducing nozzle, a tank water supply path, a first pump, a tank drainage path, a second pump, and a control device. It has. The air introduction path introduces air into the tank. The air valve opens and closes the air introduction path. The bathtub water supply path has an upstream end connected to the tank and a downstream end connectable to the bathtub. A decompression nozzle is installed in the connection part of a bathtub water supply path and a bathtub. The tank water supply path has an upstream end that can be connected to a water supply source, and a downstream end that is connected to the tank. The first pump is interposed in the tank water supply path and sends out water in the tank water supply path to the downstream side. The tank drainage path has an upstream end connected to the tank and a downstream end connectable to the drainage destination. The second pump is interposed in the tank drainage path and sends out water in the tank drainage path to the downstream side. The control device controls the air valve, the first pump, and the second pump. Then, the control device opens the air valve and operates the second pump, thereby discharging water in the tank to the drainage destination and introducing air into the tank, and closing the air valve and the first. A water supply step of supplying water into the tank is performed by operating the pump.
Note that “connection” refers to a state in which water or air can flow from one component to the other component. For example, the expression “one component and the other component are connected” means that “one component and the other component are physically connected directly, and there is water between the components. (Or a state in which air (or air) can flow ”as well as“ one component and the other component are connected via a water channel (or air channel), and water (or It also means “a state in which air can flow”.

In this fine bubble generating device, the control device executes a water supply step and an air introduction step.
The air introduction step is executed in a state where water is stored in the tank. In the air introduction step, the air valve is opened and the second pump is operated. Then, since a 2nd pump sends out the water in a tank drainage path to the downstream, water flows out from a tank to a tank drainage path. The water that flows out to the tank drainage path flows downstream through the tank drainage path and is discharged to the drainage destination. That is, the water in the tank is discharged to the drainage destination. Therefore, the water level in the tank is lowered. When the water level in the tank drops, the pressure in the tank decreases. When the pressure in the tank decreases, air is introduced into the tank through the air introduction path.
The water supply step is performed after air is introduced into the tank. In the water supply step, the air valve is closed and the first pump is operated. Then, the water is vigorously discharged from the tank water supply path into the tank by pressurization of the first pump. The water discharged into the tank flows into the bathtub through the bathtub water supply path and the pressure reducing nozzle. However, since the water flow resistance of the decompression nozzle is high, the amount of water flowing into the bathtub is small compared to the amount of water released into the tank from the tank water supply path. Therefore, the pressure in the tank rises and becomes high pressure. When the pressure in the tank is high, water is released into the tank vigorously, thereby generating air-dissolved pressurized water in the tank. The generated air-dissolved pressurized water flows into the bathtub through the bathtub water supply path and the decompression nozzle. Therefore, a large amount of fine bubbles are generated in the bathtub.

  As described above, the fine bubble generator of the present invention discharges water in the tank by the second pump in the air introduction step. Therefore, the water in the tank can be discharged at a high speed. That is, the air introduction step can be completed in a short time. Since the air introduction step is a short time, when the fine bubble generating device is continuously operated (repeated operation of the water supply step and the air introduction step), the time during which the fine bubbles are not generated in the bathtub is short. Therefore, the water in the bathtub can be maintained in a cloudy state.

In the fine bubble generating apparatus described above, the second pump may be configured by a pump mounted on the heat source device.
That is, the heat source machine which supplies warm water to a bathtub is installed in the normal bathtub (the bathtub in which the fine bubble generator is not installed). The heat source machine has an upstream end connected to a water supply source and a downstream end connected to a bathtub (that is, a water path that supplies water to the bathtub), a pump that sends water in the water channel to the downstream side, and A heater for heating the water in the water channel is provided. Therefore, when installing the fine bubble generator mentioned above in the bathtub provided with the heat source machine, a 2nd pump can be comprised with the pump of a heat source machine. For example, the pump of the heat source device can be used as the second pump by using the water channel of the heat source device as a part of the tank drainage path of the fine bubble generating device. Thus, if the microbubble generator is installed using the configuration of the heat source machine, it is not necessary to newly install the second pump.

  In addition, the present invention provides a new fine bubble generator that can complete the air introduction step in a short time. The fine bubble generating device includes a tank, an air introduction channel, an air valve, a bathtub water supply channel, a pressure reducing nozzle, a tank water supply channel, a tank drainage channel, a tank water supply / drainage channel, a water supply / drainage pump, and a water source waterway. The 1st switching valve, the discharge water channel, the 2nd switching valve, and the control apparatus are provided. The air introduction path introduces air into the tank. The air valve opens and closes the air introduction path. The bathtub water supply path has an upstream end connected to the tank and a downstream end connectable to the bathtub. A decompression nozzle is installed in the connection part of a bathtub water supply channel and a bathtub. The tank water supply channel has a downstream end connected to the tank. The upstream end of the tank drainage channel is connected to the tank. The tank water supply / drainage channel has an upstream end connected to the downstream end of the tank drainage channel and a downstream end connected to the upstream end of the tank water supply channel. Below, the connection part of a tank drainage channel and a tank supply / drainage channel is called a 1st connection part, and the connection part of a tank supply / drainage channel and a tank supply channel is called a 2nd connection part. The water supply / drainage pump is interposed in the tank water supply / drainage channel, and sends water in the tank water supply / drainage channel downstream. The upstream end of the water source channel is connectable to a water supply source, and the downstream end is connected to the first connection portion. The first switching valve is interposed in the first connection portion and switches between a state in which water flows from the tank drainage channel to the tank supply / drainage channel and a state in which water flows from the water source channel to the tank supply / drainage channel. The upstream end of the drainage channel is connected to the second connection portion, and the downstream end can be connected to the drainage destination. The second switching valve is interposed in the second connection portion, and switches between a state in which water flows from the tank water supply / drainage channel to the tank water supply channel and a state in which water flows from the tank water supply / drainage channel to the discharge waterway. The control device controls the air valve, the water supply / drainage pump, the first switching valve, and the second switching valve. The control device opens the air valve, sets the first switching valve in a state where water flows from the tank drainage channel to the tank water supply / drainage channel, sets the second switching valve in a state where water flows from the tank water supply / drainage channel to the discharge water channel, , The air introduction step for discharging the water in the tank to the drainage destination and introducing the air into the tank, the air valve is closed, and the first switching valve is in a state where water flows from the water source water channel to the tank water supply / drainage channel Then, the water supply step of supplying water from the water supply source into the tank is performed by setting the second switching valve in a state where water flows from the tank water supply / drainage channel to the tank water supply channel and operating the water supply / drainage pump.

  FIG. 6 schematically shows an example of a microbubble generator having the above-described configuration. In addition, FIG. 6 has shown the state which attached the microbubble generator to the bathtub. In FIG. 6, reference numeral 410 is a tank, reference numeral 412 is a tank drainage channel, reference numeral 414 is a first switching valve, reference numeral 416 is a water source channel, reference numeral 418 is a water supply source, reference numeral 420 is a tank feed channel, Reference number 422 is a water supply / drainage pump, reference number 424 is a second switching valve, reference number 426 is a drainage channel, reference number 428 is a drainage destination, reference number 430 is a tank water supply channel, reference number 432 is an air introduction channel, reference number 434 is An air valve, reference numeral 436 indicates a bathtub water supply channel, reference numeral 438 indicates a pressure reducing nozzle, and reference numeral 440 indicates a bathtub. In FIG. 6, illustration of the control device is omitted. FIG. 6 exemplifies a fine bubble generating apparatus having this configuration, and does not limit the configuration of claim 2. Moreover, the structure of FIG. 6 shows the minimum structure established in principle, and other valves and water channels may be added to the actual product.

As described above, in this fine bubble generating device, the control device controls each part in the following state in the air introduction step.
Air valve 434: Open First switching valve 414: Water flows from tank drainage channel 412 to tank water supply / drainage channel 420 Second switching valve 424: Water flows from tank water supply / drainage channel 420 to discharge water channel 426 422: Operation When each part is controlled as described above, a tank drainage path for discharging water in the tank 410 is formed by the tank drainage path 412, the tank supply / drainage path 420, and the drainage path 426 as indicated by an arrow 450. Is done. By the operation of the water supply / drainage pump 422, the water in the tank 410 flows through the tank drainage path and is discharged to the drainage destination 428. Accordingly, air is introduced into the tank 410 through the air introduction path 432 as indicated by an arrow 452.
Moreover, in a water supply step, a control apparatus controls each part in the following states.
Air valve 434: Closed First switching valve 414: Water flows from water source water channel 416 to tank water supply / drainage channel 420 Second switching valve 424: Water flows from tank water supply / drainage channel 420 to tank water supply channel 430 422: Operation When each part is controlled as described above, a tank water supply path for supplying water to the tank 410 is formed by the water source water path 416, the tank water supply / drainage path 420, and the tank water supply path 430 as indicated by an arrow 460. The By the operation of the water supply / drainage pump 422, water is supplied from the water supply source 418 to the tank 410 via the tank water supply path. Therefore, air-dissolved pressurized water is generated in the tank 410. The generated air-dissolved pressurized water flows through the bathtub water supply path 436 as indicated by an arrow 462 and is discharged from the decompression nozzle 438 into the bathtub 440. Accordingly, fine bubbles are generated in the bathtub 440.

As described above, the air introduction step and the water supply step can be executed also by this fine bubble generating device. In the air introduction step, water in the tank is discharged by the water supply / drainage pump 422. Therefore, the air introduction step can be completed in a short time.
In the water supply step, the water supply / drainage pump 422 functions as a water supply pump that supplies water to the tank 410, and in the air introduction step, the water supply / drainage pump 422 functions as a drainage pump that discharges water from the tank 410. Therefore, it is not necessary to install a water supply pump and a drainage pump separately. The microbubble generator can be further simplified.

In the fine bubble generating device described above, the water supply / drainage pump may be constituted by a pump mounted on the heat source device.
That is, when the above-described fine bubble generating device is installed in a bathtub provided with a heat source device, the water supply / drainage pump can be configured by a pump mounted on the heat source device. For example, in the microbubble generator of FIG. 6, the configuration shown in range 500 (that is, tank supply / drainage channel 420, supply / drainage pump 422, and water source water channel 416) is configured using the water channel and pump of the heat source machine. can do. Thus, if the microbubble generator is installed using the configuration of the heat source machine, there is no need to newly install a water supply / drainage pump.

  According to the fine bubble generator of the present invention, the air introduction step can be completed in a short time. Therefore, the state in which the water in the bathtub is cloudy can be maintained during continuous operation of the fine bubble generating device.

The main features of the embodiments described in detail below are listed first.
(Characteristic 1) The water supply valve which opens and closes a bathtub water supply path is interposed in the bathtub water supply path.
(Feature 2) The water supply valve is closed in the air introduction step, and the water supply valve is opened in the water supply step.

  Embodiments of the microbubble generator of the present invention will be described with reference to the drawings. FIG. 1 shows a circuit diagram of a microbubble generator 10 of the embodiment. As shown in the figure, the microbubble generator 10 is connected to a bathtub 150 and a tap water supply source 200. The fine bubble generator 10 includes a fine bubble generator 110 and a heat source device 120. The heat source device 120 is previously installed in the bathtub 150. That is, the fine bubble generator 10 including the fine bubble generator 110 and the heat source device 120 is configured by adding the fine bubble generator 110 between the existing bathtub 150 and the existing heat source device 120 later.

(Configuration of microbubble generator 10)
The fine bubble generating apparatus 10 includes a tank 130, an air introduction path 140, first to tenth water paths, a pressure reducing nozzle 160, and a control device 170.

The tank 130 can store water therein. A downstream end of the first water passage 11 and a downstream end of the air introduction passage 140 are connected to the upper portion of the tank 130. The upstream end of the second water channel 21 is connected to the lower part of the tank 130.
An injection nozzle 131 is installed on the upper portion of the tank 130. A downstream end of the first water channel 11 is connected to the injection nozzle 131. The spray nozzle 131 sprays water supplied from the first water channel 11 into the tank 130.
Inside the tank 130, water level electrodes 132a and 132b extending downward from the upper surface of the tank 130 are installed. The water level electrode 132a is longer than the water level electrode 132b. Although not shown, the water level electrodes 132 a and 132 b are electrically connected to the control device 170. When the water level electrodes 132 a and 132 b come into contact with the water surface of the water stored in the tank 130, a signal is output to the control device 170.

The air introduction path 140 has an upstream end open to the outside and a downstream end connected to the upper portion of the tank 130. The air introduction path 140 introduces air into the tank 130.
An air check valve 141 is interposed in the air introduction path 140. The air check valve 141 prevents air from flowing back through the air introduction path 140.
An air valve 142 is interposed downstream of the air check valve 141 in the air introduction path 140. The air valve 142 opens and closes the air introduction path 140. Although not shown, the air valve 142 is electrically connected to the control device 170. Opening and closing of the air valve 142 is controlled by the control device 170.

The first water channel 11 has an upstream end connected to the switching valve 70 and a downstream end connected to the injection nozzle 131 of the tank 130. As will be described in detail later, the upstream end of the first water channel 11 is connected to a water supply source (either the bathtub 150 or the tap water supply source 200) by switching the valve of each part of the fine bubble generating device 10.
A pump 12 is interposed in the first water channel 11. The pump 12 sends out the water in the first water channel 11 to the downstream side. Although not shown, the pump 12 is electrically connected to the control device 170. The operation of the pump 12 is controlled by the controller 170.
A check valve 13 is interposed downstream of the pump 12 in the first water channel 11. The check valve 13 prevents the water in the first water channel 11 from flowing backward.

  The upstream end of the second water channel 21 is connected to the lower part of the tank 130. The downstream end of the second water channel 21 is branched into a third water channel 31 and a fourth water channel 41.

  The downstream end of the third water channel 31 is connected to the switching valve 20.

The downstream end of the fourth water channel 41 is connected to the bathtub 150.
A decompression nozzle 160 is installed at the connection between the fourth water channel 41 and the bathtub 150. The decompression nozzle 160 ejects water supplied from the second water passage 21 into the bathtub 150. The decompression nozzle 160 has a small cross-sectional area of the flow path. Therefore, the pressure reducing nozzle 160 has a very high water flow resistance.
A water supply valve 42 is interposed in the middle of the fourth water channel 41. The water supply valve 42 opens and closes the fourth water channel 41. Although not shown, the water supply valve 42 is electrically connected to the control device 170. Opening and closing of the water supply valve 42 is controlled by the control device 170.

  The upstream end of the fifth water channel 51 is connected to the switching valve 20. The downstream end of the fifth water channel 51 is connected to both the downstream end of the sixth water channel 61 and the upstream end of the seventh water channel 71.

The upstream end of the sixth water channel 61 is connected to the tap water supply source 200. The downstream end of the sixth water channel 61 is connected to both the downstream end of the fifth water channel 51 and the upstream end of the seventh water channel 71.
A heater 62 is installed in the sixth water channel 61. The heater 62 heats the water flowing through the sixth water channel 61. Although not shown, the heater 62 is electrically connected to the control device 170. The operation of the heater 62 is controlled by the control device 170.
A water injection valve 63 is interposed on the downstream side of the heater 62 in the sixth water channel 61. The water injection valve 63 opens and closes the sixth water channel 61. Although not shown, the water injection valve 63 is electrically connected to the control device 170. Opening and closing of the water injection valve 63 is controlled by the control device 170.

The upstream end of the seventh water channel 71 is connected to both the downstream end of the fifth water channel 51 and the downstream end of the sixth water channel 61. The downstream end of the seventh water channel 71 is connected to the switching valve 70.
A pump 72 is interposed in the seventh water channel 71. The pump 72 sends out the water in the seventh water channel 71 to the downstream side. Although not shown, the pump 72 is electrically connected to the control device 170. The operation of the pump 72 is controlled by the controller 170.
A heater 73 is installed downstream of the pump 72 in the seventh water channel 71. The heater 73 heats the water flowing in the seventh water channel 71. Although not shown, the heater 73 is electrically connected to the control device 170. The operation of the heater 73 is controlled by the control device 170.

  The upstream end of the eighth water channel 81 is connected to the switching valve 70. The downstream end of the eighth water channel 81 is connected to both the upstream end of the ninth water channel 91 and one end of the tenth water channel 101.

The upstream end of the ninth water channel 91 is connected to both the downstream end of the eighth water channel 81 and one end of the tenth water channel 101. The downstream end of the ninth water channel 91 is connected to the switching valve 20.
A check valve 92 is interposed in the ninth water channel 91. The check valve 92 prevents the water in the ninth water passage 91 from flowing backward (water flowing in the direction indicated by the arrow 95 in FIG. 1).

  One end of the tenth water channel 101 is connected to both the downstream end of the eighth water channel 81 and the upstream end of the ninth water channel 91. The other end of the tenth water channel 101 is connected to the bathtub 150.

  The switching valve 70 is connected to the upstream end of the first water channel 11, the downstream end of the seventh water channel 71, and the upstream end of the eighth water channel 81. The switching valve 70 is configured such that water flows from the seventh water channel 71 to the first water channel 11 (that is, a state in which the seventh water channel 71 and the first water channel 11 are connected), and water from the seventh water channel 71 to the eighth water channel 81. Is switched (that is, a state where the seventh water channel 71 and the eighth water channel 81 are connected). Although not shown, the switching valve 70 is electrically connected to the control device 170. Switching of the switching valve 70 is controlled by the control device 170.

  The selector valve 20 is connected to the downstream end of the third water channel 31, the upstream end of the fifth water channel 51, and the downstream end of the ninth water channel 91. The switching valve 20 has a state in which water flows from the third water channel 31 to the fifth water channel 51 (that is, a state in which the third water channel 31 and the fifth water channel 51 are connected), and water from the ninth water channel 91 to the fifth water channel 51. Is switched (that is, a state in which the ninth water channel 91 and the fifth water channel 51 are connected). Although not shown, the switching valve 20 is electrically connected to the control device 170. Switching of the switching valve 20 is controlled by the control device 170.

  As described above, the control device 170 is electrically connected to the water level electrodes 132a and 132b, the pumps 12 and 72, the air valve 142, the water supply valve 42, the water injection valve 63, the switching valves 20 and 70, and the heaters 62 and 73. ing. The control device 170 is also electrically connected to an input device (not shown). When the user of the fine bubble generating device 10 operates the input device, a control signal is input to the control device 170. The control device 170 responds to a control signal input from the input device and a signal input from the water level electrodes 132a and 132b, and the pumps 12, 72, the air valve 142, the water supply valve 42, the water injection valve 63, the switching valve 20, 70 and heaters 62 and 73 are controlled.

(Operation of the microbubble generator 10)
Next, the operation of the fine bubble generator 10 will be described. The microbubble generator 10 includes an air introduction step for introducing air into the tank 130, a first water supply step for supplying water to the tank 130 using the tap water supply source 200 as a water supply source, and a tank using the bathtub 150 as a water supply source. A second water supply step for supplying water to 130 may be performed.

(Air introduction step)
The air introduction step is executed when the tank 130 is substantially full (that is, the state where water is stored in the tank 130 up to the water level at which the water level electrode 132b contacts the water surface). In the air introduction step, water in the tank 130 is discharged to the bathtub 150 and air is introduced into the tank 130. FIG. 1 shows a state of the fine bubble generating device 10 during execution of the air introduction step. The arrows (excluding the arrow 95) in FIG. 1 indicate the flow of water during the air introduction step. In the air introduction step, the control device 170 controls each part of the fine bubble generating device 10 in the following state.
Pump 12: Stop, Air valve 142: Open, Water supply valve 42: Closed, Switching valve 20: State in which the third water channel 31 and the fifth water channel 51 are connected Switch valve 70: Seventh water channel 71 and eighth A state where the water channel 81 is connected. Pump 72: Operation / Water injection valve 63: Closed / heater 73: Stop / heater 62: Stop

As shown in FIG. 1, in the air introduction step, from the tank 130 to the bathtub 150 through the second water channel 21, the third water channel 31, the fifth water channel 51, the seventh water channel 71, the eighth water channel 81, and the tenth water channel 101. A reaching tank drainage path (that is, the tank drainage path of claim 1) is formed. In the air introduction step, since the pump 72 sends the water in the tank drainage path (seventh waterway 71) downstream, the water in the tank 130 flows through the tank drainage path and is discharged to the bathtub 150 (the pump 72 It functions as the second pump of claim 1).
That is, the water in the tank 130 flows to the second water channel 21. Since the water supply valve 42 is closed in the fourth water channel 41, water flows from the second water channel 21 to the third water channel 31. Since the switching valve 20 connects the third water channel 31 and the fifth water channel 51, water flows from the third water channel 31 to the fifth water channel 51. Since the water injection valve 63 is closed in the sixth water channel 61, water flows from the fifth water channel 51 to the seventh water channel 71. Since the switching valve 70 connects the seventh water channel 71 and the eighth water channel 81, water flows from the seventh water channel 71 to the eighth water channel 81. Since the downstream end of the ninth water channel 91 is closed by the switching valve 20, water flows from the eighth water channel 81 to the tenth water channel 101. Then, the water is discharged from the tenth water channel 101 to the bathtub 150.

  As the water in the tank 130 is discharged to the bathtub 150, the water level in the tank 130 decreases. The pressure in the tank 130 decreases as the water level decreases. In the air introduction step, the air valve 142 is open. When the pressure in the tank 130 becomes equal to or lower than the atmospheric pressure, air flows into the tank 130 through the air introduction path 140. Accordingly, the upper side of the water surface in the tank 130 is filled with air at substantially atmospheric pressure.

  The control device 170 continues the air introduction step until the water level in the tank 130 reaches a water level at which the water level electrode 132a is not in contact with the water surface. As described above, in the fine bubble generating apparatus 10, the pump 72 operates as a discharge pump that discharges the water in the tank 130, so that the water in the tank 130 is discharged at a high speed. In this embodiment, the air introduction step is completed in about 5 seconds.

In the air introduction step described above, the water supply valve 42 is closed. This is because if the water supply valve 42 (that is, the fourth water channel 41) is not closed, the water in the bathtub 150 flows back through the fourth water channel 41 and flows into the third water channel 31 by the operation of the pump 72. is there. Thus, when the water in the bathtub 150 flows into the 3rd waterway 31, the efficiency which discharges the water in the tank 130 will fall.
However, depending on the positional relationship between the water channels, the water in the bathtub 150 may not flow back through the fourth water channel 41 even when the water supply valve 42 is opened (for example, the second water channel 21 and the third water channel are positioned higher than the bathtub 150). For example, when there is a connecting portion between the water channel 31 and the fourth water channel 41). In this case, part of the water flowing out from the tank 130 to the second water channel 21 flows into the fourth water channel 41 and is discharged to the bathtub 150. When the water flows in this way, the efficiency of discharging the water in the tank 130 increases. Therefore, when each water channel is in a positional relationship where the above phenomenon is obtained, the water supply valve 42 may be opened in the air introduction step.

(First water supply step)
The first water supply step is executed when the tank 130 is almost empty (that is, a state where the water level in the tank 130 is lowered to the extent that the water level electrode 132a is not in contact with the water surface). In the first water supply step, water is supplied from the tap water supply source 200 to the tank 130 to generate air-dissolved pressurized water. Then, the generated air-dissolved pressurized water is supplied from the tank 130 to the bathtub 150, and fine bubbles are generated in the bathtub 150. FIG. 2 shows a state of the fine bubble generating device 10 during execution of the first water supply step. The arrows in FIG. 2 indicate the flow of water during execution of the first water supply step. In the first water supply step, the control device 170 controls each part of the fine bubble generating device 10 in the following state.
Pump 12: Actuation Air valve 142: Closed Water supply valve 42: Opening / switching valve 20: A state where the ninth water channel 91 and the fifth water channel 51 are connected (that is, the downstream end of the third water channel 31 is closed) State)
・ Switching valve 70: a state in which the seventh water passage 71 and the first water passage 11 are connected. ・ Pump 72: operation. ・ Water injection valve 63: open. ・ Heater 73: stop.

As shown in FIG. 2, in the first water supply step, a tank water supply path that reaches from the tap water supply source 200 to the sixth water path 61, the seventh water path 71, the first water path 11, and the tank 130 (that is, according to claim 1). A tank water supply path (a tank water supply path when the tap water supply source 200 is used as a water supply source) is formed. Further, a bathtub water supply path (that is, a bathtub water supply path of claim 1) that reaches the bathtub 150 from the tank 130 through the second water channel 21 and the fourth water channel 41 is formed. In the first water supply step, water supply pressure is applied from the tap water supply source 200, and both the pump 12 and the pump 72 send water in the tank water supply path (first water path 11, seventh water path 71) to the downstream side. (Pump 12 and pump 72 function as the first pump of claim 1). Therefore, water supplied from the tap water supply source 200 flows through the tank water supply path and is supplied to the tank 130, and flows from the tank 130 through the bathtub water supply path and is supplied to the bathtub 150.
That is, since the water injection valve 63 is open, water flows into the sixth water channel 61 from the tap water supply source 200. The water that has flowed into the sixth water channel 61 flows into the connecting portion between the fifth water channel 51 and the seventh water channel 71. The upstream end of the fifth water channel 51 is connected to the ninth water channel 91 by the switching valve 20, but the ninth water channel 91 is prevented from flowing back by the check valve 92. Accordingly, water flows from the sixth water channel 61 to the seventh water channel 71. Since the switching valve 70 connects the seventh water channel 71 and the first water channel 11, water flows from the seventh water channel 71 to the first water channel 11. And it injects in the tank 130 from the injection nozzle 131 connected to the downstream end of the 1st water channel 11. FIG. The movement of water in the tank 130 will be described in detail later, but the water injected into the tank 130 flows to the second water channel 21. Since the water supply valve 42 of the fourth water channel 41 is open and the downstream end of the third water channel 31 is closed by the switching valve 20, water flows to the fourth water channel 41. Then, water is discharged from the decompression nozzle 160 into the bathtub 150.

As described above, the water supplied from the tap water supply source 200 is sent to the tank 130 by the supply pressure of the water from the tap water supply source 200 and the pressure at which the pump 12 and the pump 72 send water. Therefore, water is supplied to the tank 130 at a very high pressure. That is, water is injected from the injection nozzle 131 into the tank 130 at a very high pressure. At this time, since the air valve 142 is closed, the tank 130 is sealed except for the second water passage 21. The water in the tank 130 is discharged from the decompression nozzle 160 into the bathtub 150 through the second water passage 21, but as described above, the water flow resistance of the decompression nozzle 160 is high. Therefore, the amount of water injected from the injection nozzle 131 into the tank 130 is larger than the amount of water discharged from the decompression nozzle 160 into the bathtub 150. Therefore, the pressure in the tank 130 increases. Since the pressure of water sprayed from the spray nozzle 131 is very high, the pressure in the tank 130 becomes high in a short time. When the water sprayed into the tank 130 collides with the surface of the water stored in the tank 130, air is caught in the water. At this time, since the pressure in the tank 130 is high, the air entrained in the water dissolves in the water. Therefore, air-dissolved pressurized water is generated in the tank 130. The air-dissolved pressurized water generated in the tank 130 is discharged from the decompression nozzle 160 into the bathtub 150 through the second water channel 21 and the fourth water channel 41. The air-dissolved pressurized water released into the bathtub 150 is rapidly depressurized at the moment when it passes through the depressurizing nozzle 160. Then, air dissolved in water becomes fine bubbles having a diameter of about 20 μm. That is, a large amount of fine bubbles are generated in the bathtub 150, and the water becomes cloudy.
In addition, the water supplied to the bathtub 150 is heated by the heater 62 when flowing in the sixth water channel 61. Accordingly, hot water is supplied to the bathtub 150.

  As described above, in the first water supply step, the amount of water injected from the injection nozzle 131 into the tank 130 is larger than the amount of water discharged from the decompression nozzle 160 into the bathtub 150. Accordingly, the water level in the tank 130 gradually rises while the first water supply step is being performed. The control device 170 continues the first water supply step until the water level in the tank 130 reaches the water level at which the water level electrode 132b contacts the water surface.

When performing the 1st water supply step and air introduction step which were demonstrated above, each part of the microbubble generator 10 functions as follows.
The seventh water channel 71 is a water channel through which water discharged from the tank 130 flows during the air introduction step, and water supplied to the tank 130 flows during the first water supply step. That is, the seventh water channel 71 functions as a tank water supply / drainage channel according to claim 3.
The first water channel 11 supplies water supplied from the tank water supply / drainage channel (seventh water channel 71) to the tank 130 during execution of the first water supply step. That is, the first water channel 11 functions as a tank water channel according to claim 3.
The second water channel 21 and the fourth water channel 41 supply the water in the tank 130 to the bathtub 150 during execution of the first water supply step. That is, the 2nd waterway 21 and the 4th waterway 41 function as a bathtub water supply channel of Claim 3.
The sixth water channel 61 supplies water supplied from the water supply source (tap water supply source 200) to the tank water supply / drainage channel (seventh water channel 71) during execution of the first water supply step. That is, the sixth water channel 61 functions as the water source water channel of claim 3.
The second water channel 21, the third water channel 31, and the fifth water channel 51 supply the water in the tank 130 to the tank water supply / drainage channel (seventh water channel 71) during execution of the air introduction step. That is, the 2nd waterway 21, the 3rd waterway 31, and the 5th waterway 51 function as a tank drainage channel of Claim 3. As described above, the second water channel 21 also functions as a bathtub water channel. The second water channel 21 is also a bathtub water supply channel and a tank drainage channel.
The eighth water channel 81 and the tenth water channel 101 discharge water supplied from the tank water supply / drainage channel (seventh water channel 71) to the drainage destination (tub 150) during the air introduction step. That is, the eighth water channel 81 and the tenth water channel 101 function as the discharge water channel of claim 3.
During the execution of the air introduction step, the water injection valve 63 is closed, and the switching valve 20 connects the third water channel 31 and the fifth water channel 51. As a result, water flows from the tank drainage channel (second water channel 21, third water channel 31, and fifth water channel 51) to the tank water supply / drainage channel (seventh water channel 71). On the other hand, during the execution of the first water supply step, the water injection valve 63 is opened, and the switching valve 20 closes the tank drainage channels (the second water channel 21, the third water channel 31, and the fifth water channel 51) (that is, the third water channel 31). To the fifth water channel 51). As a result, water flows from the water source water channel (sixth water channel 61) to the tank water supply / drainage channel (seventh water channel 71). That is, the first switching valve that switches between a state in which water flows from the tank drainage channel to the tank water supply / drainage channel and a state in which water flows from the water source channel to the tank water supply / drainage channel by the water injection valve 63 and the switching valve 20. A switching valve).
The switching valve 70 is connected to the tank water supply / drainage channel (seventh waterway 71) and the tank water supply channel (first waterway 11), and the tank water supply / drainage channel (seventh waterway 71) and the discharge waterway (eighth waterway 81). Switch between connected and. That is, the switching valve 70 functions as the second switching valve of claim 3.
The pump 72 sends out water in the tank water supply / drainage channel (seventh water channel 71) to the downstream side. That is, the pump 72 functions as a water supply / drainage pump according to claim 3. The tank water supply / drainage channel (seventh waterway 71) is both a part of the tank water supply route and a part of the tank drainage route. Therefore, the pump 72 is both the first pump and the second pump of claim 1.

(Second water supply step)
The second water supply step is executed when the tank 130 is almost empty (that is, a state where the water level in the tank 130 is lowered to the extent that the water level electrode 132a is not in contact with the water surface). In a 2nd water supply step, water is supplied to the tank 130 from the bathtub 150, and air melt | dissolution pressurized water is produced | generated. Then, the generated air-dissolved pressurized water is returned from the tank 130 to the bathtub 150, and fine bubbles are generated in the bathtub 150. FIG. 3 shows a state of the fine bubble generator 10 during execution of the second water supply step. The arrows in FIG. 3 indicate the flow of water during execution of the second water supply step. In the second water supply step, the control device 170 controls each part of the fine bubble generating device 10 in the following state.
Pump 12: Actuation Air valve 142: Closed Water supply valve 42: Open / Switching valve 20: A state in which the ninth water channel 91 and the fifth water channel 51 are connected. A switching valve 70: the seventh water channel 71 and the first. A state where the water channel 11 is connected. Pump 72: Operation / Water injection valve 63: Closed / heater 73: Stop / heater 62: Stop

As shown in FIG. 3, in the second water supply step, a tank water supply path that reaches from the bathtub 150 to the tenth water channel 101, the ninth water channel 91, the fifth water channel 51, the seventh water channel 71, the first water channel 11, and the tank 130. (That is, a tank water supply path of claim 1 (a tank water supply path when the bathtub 150 is used as a water supply source)) is formed. Further, a bathtub water supply path (that is, a bathtub water supply path of claim 1) that reaches the bathtub 150 from the tank 130 through the second water channel 21 and the fourth water channel 41 is formed. In the second water supply step, the pump 12 and the pump 72 send the water in the tank water supply passage (the first water passage 11 and the seventh water passage 71) downstream (the pump 12 and the pump 72 serve as the first pump of claim 1). Function). Therefore, the water in the bathtub 150 flows through the tank water supply path and is supplied to the tank 130, and flows from the tank 130 through the bathtub water supply path to the bathtub 150.
That is, the water in the bathtub 150 flows to the tenth water channel 101. Since the upstream end of the eighth water channel 81 is closed by the switching valve 70, water flows from the tenth water channel 101 to the ninth water channel 91. Since the switching valve 20 connects the ninth water channel 91 and the fifth water channel 51, water flows from the ninth water channel 91 to the fifth water channel 51. Since the water injection valve 63 is closed, water flows from the fifth water channel 51 to the seventh water channel 71. Since the switching valve 70 connects the seventh water channel 71 and the first water channel 11, water flows from the seventh water channel 71 to the first water channel 11. And it injects in the tank 130 from the injection nozzle 131 connected to the downstream end of the 1st water channel 11. FIG. In the tank 130, air-dissolved pressurized water is generated in the same manner as in the first water supply step. The generated air-dissolved pressurized water flows to the second water channel 21. Since the water supply valve 42 of the fourth water channel 41 is open and the downstream end of the third water channel 31 is closed by the switching valve 20, water flows to the fourth water channel 41. Then, water is discharged from the decompression nozzle 160 into the bathtub 150. That is, air-dissolved pressurized water is released into the bathtub 150, and a large amount of fine bubbles are generated in the bathtub 150.

  The water level in the tank 130 gradually rises while performing the second water supply step. The control device 170 continues the second water supply step until the water level in the tank 130 reaches a water level at which the water level electrode 132b is in contact with the water surface.

When performing the 2nd water supply step and air introduction step which were demonstrated above, each part of the microbubble generator 10 functions as follows.
The fifth water channel 51 and the seventh water channel 71 are water channels through which water discharged from the tank 130 flows during the air introduction step and water supplied to the tank 130 flows during the second water supply step. That is, the fifth water channel 51 and the seventh water channel 71 function as the tank water supply / drainage channel of claim 3.
The first water channel 11 supplies the water supplied from the tank water supply / drainage channel (seventh water channel 71) to the tank 130 during execution of the second water supply step. That is, the first water channel 11 functions as a tank water channel according to claim 3.
The second water channel 21 and the fourth water channel 41 supply water in the tank 130 to the bathtub 150 during execution of the second water supply step. That is, the 2nd waterway 21 and the 4th waterway 41 function as a bathtub water supply channel of Claim 3.
The ninth water channel 91 and the tenth water channel 101 supply water supplied from the water supply source (tub 150) to the tank water supply / drainage channel (fifth water channel 51) during execution of the second water supply step. That is, the ninth water channel 91 and the tenth water channel 101 function as the water source water channel of claim 3.
The second water channel and the third water channel 31 supply water in the tank 130 to the tank water supply / drainage channel (fifth water channel 51) during execution of the air introduction step. That is, the second water channel 21 and the third water channel 31 function as a tank drainage channel according to claim 3. As described above, the second water channel 21 also functions as a bathtub water channel. The second water channel 21 is also a bathtub water supply channel and a tank drainage channel.
The eighth water channel 81 and the tenth water channel 101 discharge water supplied from the tank water supply / drainage channel (seventh water channel 71) to the drainage destination (tub 150) during the air introduction step. That is, the eighth water channel 81 and the tenth water channel 101 function as the discharge water channel of claim 3. As described above, the tenth water channel 101 also functions as a water source water channel. The tenth water channel 101 is both a water source water channel and a discharge water channel.
The switching valve 20 is connected to the tank drainage channel (the third water channel 31) and the tank water supply / drainage channel (the fifth water channel 51), and the water source water channel (the ninth water channel 91) and the tank water supply / drainage channel (the fifth water channel 51). Switch between connected and. That is, the switching valve 20 functions as the first switching valve of claim 3.
The switching valve 70 is connected to the tank water supply / drainage channel (seventh waterway 71) and the tank water supply channel (first waterway 11), and the tank water supply / drainage channel (seventh waterway 71) and the discharge waterway (eighth waterway 81). Switch between connected and. That is, the switching valve 70 functions as the second switching valve of claim 3.
The pump 72 sends out water in the tank water supply / drainage channel (seventh water channel 71) to the downstream side. That is, the pump 72 functions as a water supply / drainage pump according to claim 3.

  When the user performs a predetermined operation with the input device, a control signal instructing the control device 170 to execute the fine bubble supply operation is input. When receiving the control signal, the control device 170 executes the air introduction step, the first water supply step, and the second water supply step described above. The control device 170 executes each step according to the flowchart of FIG.

  As shown in FIG. 4, first, the control device 170 performs an addition hot water operation constituted by an air introduction step S2 and a first water supply step S4. As a result, water is supplied from the tap water supply source 200 to the tank 130, and air-dissolved pressurized water is generated in the tank 130. Then, the air-dissolved pressurized water is supplied to the bathtub 150, and fine bubbles are generated in the bathtub 150.

  When the additional hot water operation is completed, the control device 170 executes a circulation operation including the air introduction step S6 and the second water supply step S8. As a result, water is supplied from the bathtub 150 to the tank 130, and air-dissolved pressurized water is generated in the tank 130. Then, the air-dissolved pressurized water is supplied to the bathtub 150, and fine bubbles are generated in the bathtub 150.

  When the controller 170 executes the circulation operation three times (YES in step S10), the controller 170 executes the additional hot water operation (air introduction step S12, first water supply step S14).

  The additional hot water operation of steps S12 and S14 is performed in the same manner as the additional hot water operation of steps S2 and S4. By executing the hot water operation in steps S12 and S14, the inside of the water channel of the fine bubble generating device 10 is cleaned. That is, when the circulation operation is executed, the water supplied from the bathtub 150 flows in the water channel of the fine bubble generating device 10. Therefore, after the circulation operation is finished, foreign matters or the like often remain in the water channel of the fine bubble generating device 10. By performing the additional hot water operation after the circulation operation is completed and flowing the water supplied from the tap water supply source 200 into the water channel, the inside of the water channel of the fine bubble generating device 10 can be cleaned.

As described above, in the microbubble generator 10 of the embodiment, the water in the tank 130 is discharged by the pump 72 in the air introduction step. Therefore, the water in the tank 130 is discharged at a high speed, and the air introduction step can be completed in a short time. When the repeated operation of the air introduction step and the water supply step (the first water supply step and the second water supply step) is executed as in the flowchart of FIG. 4, the time during which fine bubbles are not generated in the bathtub 150 is shortened. Therefore, the water in the bathtub 150 can be maintained in a cloudy state.
Moreover, since the water in the tank 130 is discharged by the pump 72 regardless of the weight of the water, even if the tank 130 is installed at a position lower than the drainage destination (for example, the bathtub 150), the water in the tank 130 is discharged. Can be discharged.

  Further, the fine bubble generating apparatus 10 uses the existing heat source device 120 pump as the pump 72. Therefore, it is not necessary to separately install the pump 72 when the fine bubble generating device 10 is installed.

  In addition to the pump 72, the fine bubble generator 10 includes a pump 12. Therefore, water can be supplied to the tank 130 at a high pressure. Thereby, it is possible to generate the air-dissolved pressurized water more efficiently in the tank 130.

The pump 12 may be installed in the seventh water channel 71 (for example, near the downstream end of the seventh water channel 71 (near the switching valve 70)) in the fine bubble generator 110. According to such a configuration, the water in the tank 130 can be discharged by both the pump 72 and the pump 12 by operating the pump 12 together with the pump 72 in the air introduction step. Therefore, the water in the tank 130 can be discharged at a higher speed.
In addition, when the pump of the existing heat source device 120 (that is, the pump 72) has sufficient pumping capacity (pressurizing capacity) to generate the air-dissolved pressurized water in the tank 130, the pump 12 is turned on. It does not have to be installed. In this case, water is sent out to the tank 130 only by the pump 72 in the water supply step. Even with such a configuration, the water supply step and the air introduction step can be suitably executed. Moreover, the structure of the fine bubble generator 10 can be simplified.

  In the above-described water supply step (that is, the first water supply step and the second water supply step), the water supply valve 42 is opened. However, the water supply valve 42 may be closed immediately after the start of the water supply step, and the water supply valve 42 may be opened after a predetermined time has elapsed since the start of the water supply step. Thus, if the timing which opens the water supply valve 42 is set, the pressure in the tank 130 can be raised rapidly after the start of a water supply step. Accordingly, when the water supply valve 42 is opened, air-dissolved pressurized water that dissolves more air is supplied to the bathtub 150. That is, more fine bubbles can be generated in the bathtub 150.

(Reference example)
Next, a microbubble generator that can discharge water in a tank earlier than a conventional microbubble generator will be described as a reference example. FIG. 5 shows a microbubble generator 300 of a reference example.
The microbubble generator 300 includes a tank 330, an air introduction path 340, a tank water supply path 350 that supplies water from the bathtub 150 to the tank 330, and a bathtub water supply path 360 that supplies water from the tank 330 to the bathtub 150. Yes. And the drainage path 370 which connects the middle of the bathtub water supply path 360 and the middle of the tank water supply path 350 (the bathtub 150 side from the pump 312) is provided. An open / close valve 372 is interposed in the drainage channel 370.

In the fine bubble generating apparatus 300, in the water supply step, the air valve 342 is closed, the on-off valve 372 is closed, and the pump 312 is operated. Thereby, the water in the bathtub 150 is supplied to the tank 130 through the tank water supply channel 350. In the tank 130, air-dissolved pressurized water is generated. The generated air-dissolved pressurized water is supplied to the bathtub 150 through the bathtub water supply channel 360.
In the air introduction step, the pump 312 is stopped, the air valve 342 is opened, and the on-off valve 372 is opened. Then, the water in the tank 130 flows out into the bathtub water supply channel 360 by its own weight. Since the water flow resistance of the pressure reducing nozzle 362 is high, most of the water flowing out to the bathtub water supply channel 360 flows into the bathtub 150 through the drainage channel 370 and the tank water supply channel 350 as indicated by an arrow 390. As a result, water in the tank 330 is discharged, and air is introduced into the tank 330.

  As described above, in the fine bubble generating apparatus 300, the water in the tank 330 flows into the bathtub 150 through the drainage channel 370 and the tank water supply channel 350 in the air introduction step. Since the pressure reducing nozzle is not installed at the connection portion between the tank water supply channel 350 and the bathtub 150, the water flow resistance is low. Therefore, the water in the tank 330 can be discharged earlier.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The system diagram which shows the state in execution of the air introduction | transduction step of the microbubble generator 10 of an Example. The system diagram which shows the state in execution of the 1st water supply step of the microbubble generator 10 of an Example. The systematic diagram which shows the state in execution of the 2nd water supply step of the microbubble generator 10 of an Example. The flowchart of the control which the microbubble generator 10 of an Example performs. The systematic diagram of the fine bubble generator 10 of a reference example. The systematic diagram which shows an example of the microbubble generator of Claim 3.

Explanation of symbols

10: Fine bubble generator 11: 1st water channel 12: Pump 21: 2nd water channel 31: 3rd water channel 41: 4th water channel 42: Water supply valve 51: 5th water channel 61: 6th water channel 63: Water injection valve 71: 1st 7 water channel 72: pump 81: 8th water channel 91: 9th water channel 101: 10th water channel 110: fine bubble generator 120: heat source device 130: tank 140: air introduction channel 142: air valve 150: bathtub 160: pressure reducing nozzle 200 : Tap water supply source

Claims (4)

A device for supplying pressurized water dissolving air to the bathtub and generating fine bubbles obtained from the dissolved air in the bathtub,
A tank,
An air introduction path for introducing air into the tank;
An air valve for opening and closing the air introduction path;
A bathtub water supply path whose upstream end is connected to the tank and whose downstream end is connectable to the bathtub;
A pressure-reducing nozzle installed at the connection between the bathtub water supply path and the bathtub;
A tank water supply path whose upstream end can be connected to a water supply source and whose downstream end is connected to a tank;
A first pump that is interposed in the tank water supply path, and sends water in the tank water supply path to the downstream side;
A tank drainage path whose upstream end is connected to the tank and whose downstream end is connectable to the drainage destination;
A second pump that is interposed in the tank drainage path and sends water in the tank drainage path to the downstream side;
A control device for controlling the air valve, the first pump, and the second pump;
The control device is
An air introduction step for discharging water in the tank to a drainage destination and introducing air into the tank by opening the air valve and operating the second pump;
A water supply step of supplying water into the tank by closing the air valve and operating the first pump;
A microbubble generator characterized by performing the above.   The said 2nd pump is comprised by the pump mounted in the heat source machine, The microbubble generator of Claim 1 characterized by the above-mentioned. A device for supplying pressurized water dissolving air to the bathtub and generating fine bubbles obtained from the dissolved air in the bathtub,
A tank,
An air introduction path for introducing air into the tank;
An air valve for opening and closing the air introduction path;
A bathtub water supply channel whose upstream end is connected to the tank and whose downstream end is connectable to the bathtub;
A decompression nozzle installed at the connection between the bathtub waterway and the bathtub;
A tank water supply channel whose downstream end is connected to the tank;
A tank drainage channel whose upstream end is connected to the tank;
A tank supply / drainage channel having an upstream end connected to the downstream end of the tank drainage channel at the first connection portion and a downstream end connected to the upstream end of the tank supply channel at the second connection unit;
A water supply / drainage pump that is interposed in the tank water supply / drainage channel and sends the water in the tank water supply / drainage channel downstream,
A water source water channel whose upstream end is connectable to a water supply source and whose downstream end is connected to the first connection; and
A first switching valve that is interposed in the first connecting portion and switches between a state in which water flows from the tank drainage channel to the tank water supply / drainage channel and a state in which water flows from the water source channel to the tank water supply / drainage channel;
A drainage channel whose upstream end is connected to the second connecting portion and whose downstream end is connectable to a drainage destination;
A second switching valve that is interposed in the second connecting portion and switches between a state in which water flows from the tank water supply / drainage channel to the tank water supply channel and a state in which water flows from the tank water supply / drainage channel to the discharge waterway;
A control device for controlling the air valve, the water supply / drainage pump, the first switching valve, and the second switching valve;
With
The control device is
By opening the air valve, setting the first switching valve in a state where water flows from the tank drainage channel to the tank water supply / drainage channel, setting the second switching valve in a state where water flows from the tank supply / drainage channel to the discharge waterway, and operating the water supply / drainage pump, An air introduction step for discharging water in the tank to a drainage destination and introducing air into the tank;
By closing the air valve, setting the first switching valve in a state where water flows from the water source water channel to the tank water supply / drainage channel, setting the second switching valve in a state where water flows from the tank water supply / drainage channel to the tank water supply channel, and operating the water supply / drainage pump, A water supply step for supplying water from a water supply source into the tank;
A microbubble generator characterized by performing the above.   The fine bubble generating device according to claim 3, wherein the water supply / drainage pump is configured by a pump mounted on a heat source device.

Images