JPH0663085A - Controller of bubbling water flow generating device - Google Patents

Abstract

PURPOSE:To quickly start an operation by exhausting regasified air in the water being stagnant in a finely bubbling water flow generating means, in the beginning of the operation. CONSTITUTION:A pump 5 allows water to circulate through a circulating water circuit part A, and also, discharges it into a water tank 1 from the circuit part A including a part, and a feed conduit line 3. An ejector part 8 leads air from an air inflow apparatus 15 and water from the water tank 1 through a return conduit line 17 into the circulating water circuit part by an operation of a negative pressure part 8a by circulating water. Therefore, air is pressurized and dissolved into the water by the pump, subjected to pressure reduction from a feed conduit line and exhausted into the water tank 1, and a bubbling water flow is generated. When this operation is stopped, the air subjected to pressure reduction and dissolved into the water is regasified and stagnates. Accordingly, in the beginning of the operation, a control means 18 enlarges an opening of a pressure variable throttle part 13, opens the air inflow apparatus after a prescribed time by operating the pump, and makes the opening small. Therefore, in a state that air does not go in, regasified air is exhausted toghether with water by the pump, and air dash of the pump is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a bubbling water flow generator having a function of generating a fine bubbling water flow in a bath or other water tank by a pump for circulating water.

[0002]

2. Description of the Related Art Conventionally, as a bubbling water flow generator (jet bath device) for generating this kind of fine bubbling water flow, Japanese Patent Publication No.
Examples disclosed in Japanese Patent No. 14464 are shown in FIGS. 6, 7 and 8. Pump 1 for circulating hot water 102 in bath 101
03 of the pump 103, and the inhaler 10 of the hot water 102 connected to the suction side pipe line 105 of the pump 103.
6 and the discharge side pipe 107 of the pump 103, the two-way valve 10
The nozzle unit 111 includes a low-pressure jet nozzle 109 and a high-pressure jet nozzle 110 that are branched and connected via a nozzle 8. Further, the suction side pipe line 105 of the pump 103
A jet passage 112 is provided in the discharge side pipe line 107.
A shuttle valve 113 between the jet passage 112 and the jet passage 112.
The branch passage 114 is piped through.

The shuttle valve 113 has a conical valve 116 biased by a spring 115 as shown in FIG.
The valve rod 117 connected to the conical valve 116, the conical valve 11
The air intake passage 118, the air passage 1 of which the inflow and stop of the air into the jet passage 112 can be stopped by opening and closing 6.
It is composed of nineteen.

Further, the high-pressure jet nozzle 110 has a gas-liquid mixer 122 having spiral passages 120 and 121 alternately as shown in FIG. 8, and a valve body 1 urged by a spring 123.
Relief valve 1 having 24 and jet outlet 125
It is composed of 26.

Next, the operation will be described. In FIG. 5, when the pump 103 is operated when a fine bubbly water flow is generated, the warm water 102 is sucked from the inhaler 106 to the pump 103 via the suction side pipe line 105, and then from the pump 103. The high-pressure jet nozzle 110 jets a fine bubbly water flow into the bath 101 via the discharge side pipe 107. At this time, pump 10
The discharge pressure of 3 acts on the branch conduit 114, the discharge pressure increases, and the conical valve 116 connected to the valve rod 117 overcomes the biasing force of the spring 115 to open the conical valve 116. As a result, the air intake passage 118, the conical valve 11
6. Air is sucked into the jet passage 112 through the air passage 119 and then sucked into the pump 103. The sucked air is sent under high pressure to the pump 103, the discharge side pipe 107 and the gas-liquid mixer 122 in the high-pressure jet nozzle 110, and is pressurized and dissolved.

[0006]

However, in the above structure, the pump 1 is usually used when the fine bubble water flow operation is used.
When 03 is operated, warm water 102 is sucked into the pump 103 from the inhaler 106 through the suction side pipe line 105. Warm water 10
When 2 inhales, the relief valve 126 becomes a discharge resistance, and the pump 103, the discharge side conduit 107, and the shuttle valve 113 are set to a high pressure state almost instantaneously.
However, when the pump 103 produces air dust, the air is repeatedly compressed and decompressed, so that the high pressure state is unlikely to occur. This is because when the generation operation of the fine bubbling water flow is completed, the pressure inside the pump 103 is reduced from the high pressure state to the atmospheric pressure, so that the air that has been pressure-dissolved in the warm water until now is re-gasified and the pump is This is because the air stays in 103 and the air is in a spilled state when restarted. In addition, the discharge side pipe line 10
7. In the relief valve 126, the air is regasified in the same manner as described above, and this becomes the air of the pump 103. When the warm water 102 in the bathtub 101 is further drained, the warm water 102 in the suction side pipe line 105 is also completely drained or partially drained, and naturally, when the warm water 102 is poured into the bathtub 101 again.
Air may stay in the suction side pipe line 105 and a large amount of the air may be sucked into the pump 103 when the pump 103 operates.

The present invention solves the above problems and reduces re-vaporized air and undissolved air accumulated in a pump or the like that generates a fine bubbly water flow, thereby improving the durability and operation of the pump. (EN) Provided is a control device for a bubbly water flow generator that allows a quick start-up at the start.

[0008]

In order to achieve the above object, the first technical means in the control device of the bubbly water flow generator according to the present invention is a water tank and a fine bubbly water flow discharge portion provided in the water tank. Between the connected feed pipe and the return part of the water tank, which is connected to the outflow part for discharging water, and which has a drainage detection part, a pump for circulating the water in the water tank, and between the discharge part and the return part of the pump. A circulating circuit part for connecting a part of the water to the circulating water discharge part by connecting to the feed pipe line, and a circulating water discharging part of the circulating circuit part. A water inflow portion connected between the return pipes and an air inflow portion connected to the air inflow device and an air inflow portion connected to the air inflow device, and a negative pressure portion for communicating the both inflow portions to generate a negative pressure action by circulating water. The ejector section and water and air from the ejector section A resistance part for inflowing negative pressure, a variable throttle part for pressurization provided in the feed pipe line including the circulating water discharge part and a fine bubble water flow discharge part provided in the water tank, and for pressurizing before or after the operation of the pump. A control means for setting the throttle area of the variable throttle portion to be large and switching the setting of the throttle area to be small after a lapse of a predetermined time from the start of operation of the pump and controlling the opening of the air inflow device Is.

A second technical means of the present invention is the first technical means.
In addition to the technical means, in the operation switch [OFF], the air inlet is closed, the throttle area of the pressurizing variable throttle portion is switched from small to large, and after a predetermined time has passed, control is performed to stop the pump operation. It is equipped with means.

Further, a third technical means of the present invention is the above first
In addition to the technical means or the second technical means, it has a function of switching between a large area and a small area of the pressurizing variable throttle portion and checking the elapse of a predetermined time.

Further, a fourth technical means of the present invention is the above second aspect.
In the technical means, the predetermined time when the operation is stopped is shorter than the predetermined time when the operation is started.

[0012]

With the above means, in the bubbly water flow generator of the present invention, the air pressurized and dissolved in water is regasified by stopping the operation of the pump. The regasified air, the undissolved air, and the air in the return pipe, which accumulate in the feed pipe line including the pump, the circulating water circuit unit, and the fine bubble water flow discharge unit, are discharged in a short time. That is, the control means sets the throttle area of the pressurizing variable throttle portion to be large, operates the pump, and after a predetermined time has elapsed, sets the throttle area to be small and opens the air inflow unit. Therefore, when the pump is operated for a predetermined time with the variable throttle portion for pressurization in which the discharge resistance is small, water immediately flows into the pump from the return pipe line.
At this time, the air staying in the return pipe also flows into the pump at the same time, and although the air is absorbed, it is immediately discharged from the pump. Most of the discharged air-mixed water flows to the side of the feed pipe having a low resistance, and the air-mixed water is discharged from the fine bubbling water flow discharger to the variable pressure restricting portion having a low resistance. As a result, the pump can reliably and stably enter the normal operating state.

According to the second technical means of the present invention, the control means, in the operation switch [OFF], closes the air inflow device and then switches the throttle area of the pressurizing variable throttle portion from small to large to a predetermined value. After the time has elapsed, stop the pump operation. Therefore, the dissolved water of the air to be re-gasified in the pump, the circulating water circuit unit and the feed pipe, the undissolved air can be discharged at the end of the operation without air entering from the outside, It becomes possible to increase the pressure in a short time when restarting.

Further, according to the third technical means of the present invention, the control means switches the size of the diaphragm area of the variable pressurizing portion for pressurization,
A predetermined time from the start of operation of the pump corresponding to this switching and a predetermined time until the operation is stopped are checked to confirm the switching and the passage of time.

Furthermore, according to the fourth technical means of the present invention, the control means minimizes the operating time of the pump.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bubble generating device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention, in which a water tank 1 is connected to the fine bubble water flow discharge portion 2 provided in the water tank 1 and the fine bubble water flow discharge portion 2. A return pipe 17 connected to a feed pipe 3 for sending pressurized dissolved air and an outflow portion 16 for flowing out the water 4 in the water tank 1 is provided. The pump 5 has both functions of circulating and pressurizing the water 4 in the water tank 1, and is of a fugal type, a cascade type, to which pressurizing specifications and self-sufficiency specifications are added. The return pipe line 17 and the feed pipe line 3 are provided.
Is in communication between. The circulating water circuit unit A is connected between the discharge unit 6 and the return unit 7 of the pump 5, and is connected to the feed pipe line 3 to form a circulating water discharge unit 12. This circulating water discharge unit 1
Circulate a part of water from 2. The ejector section 8 is connected to the circulating water circuit section A between the circulating water discharge section 12 and the return section 7,
It has a negative pressure portion 8a which becomes a negative pressure region due to the action of circulating water, a water inflow portion 9 and an air inflow portion 10 which communicate with this. Then, the ejector unit 8 connects the return pipe 17 to the water inflow unit 9, and connects the air inflow unit 15 to the air inflow unit 10 such as an air solenoid valve, a motor-type on-off valve, and a motor-type needle valve to inject and stop air. is doing. Reference numeral 13 denotes a pressurizing variable throttle portion provided in the feed pipe line 3 near the fine bubbling water flow discharge portion 2, and has a pressurizing and depressurizing function by a throttle valve, a valve body with a spring, a valve body with a diaphragm / spring, a needle valve and the like. I have it. Reference numeral 14 denotes a fluid resistance portion formed by narrowing the diameter of the return conduit 17 close to the water inflow portion 9, and causes water and air to flow in a negative pressure from the ejector portion 8. Reference numeral 18 is a feed pipe line 3, a pump 5, an ejector unit 8, a pressurizing variable throttle unit 13, a resistance unit 14, an air inflow unit 1.
5, a control means for controlling the bubbly water flow generating means composed of the return pipe line 17 and the circulating water circuit section A. In order to control No. 15, these are connected to each other as shown by dotted lines.

That is, the control means 18 performs the following control. At the start of the operation of the operation switch [ON], the diaphragm area of the pressurizing variable throttle portion 13 is set to a large value (hereinafter referred to as S2) to operate the pressurizing variable throttle portion 13 so as to increase the opening area, and After the pump 5 has been operated for a certain period of time, the throttle area is set small (hereinafter referred to as S1) to operate the pressurizing variable throttle portion 13 so as to reduce the opening area, and then the air inflow device 15 Control to start the normal bubbly water flow generation operation.

The operation of generating a bubbly water flow in the present invention will be described below. The operation switch of the control means 18 is operated.
Then, the pump 5 in a state of being filled with water is rotated, and a part of the discharged circulating water is discharged from the discharge part 12 to the feed pipe line 3,
The fine bubbling water stream discharger 2 ejects the water into the water tank 1 through the pressurizing variable throttle portion 13, and the rest of the circulating water circulates in the circulating water circuit portion A. When this circulation is performed, the ejector portion 8 functions, and the water 4 in the water tank 1 is sucked into the negative pressure portion 8a of the ejector portion 8 through the return pipe 17. Then, when this water 4 is sucked into the return portion 7 of the pump 5 via the ejector portion 8, the pressure on the suction side of the pump 5 rises. If the pump 5 continues to operate in this state, the pressure on the discharge portion 6 side is also increased. That is, since the pressurizing variable throttle portion 13 of the feed pipe line 3 is rapidly contracted, the pump 5 is operating in a substantially deadline operation state. Therefore, the pressure on the side of the return portion 7 rises, and the shut-off pressure of the pump 5 is applied, so that the pressure rise can be obtained. In such an operating state, the air inflow device 15 also controls the control means 1.
8 operates, the air flows in and is sucked from the air inflow portion 10 to the negative pressure portion 8a of the ejector portion 8. This air enters the pump 5 from the return section 7 and is sent from the discharge section 6 to the circulating water circuit section A and the feed pipe line 3.
At this time, since the circulating water circuit unit A and the feed pipe line 3 have high pressure,
The previously sucked air is in a state of being dissolved in the water 4. When the water in which the air is dissolved passes through the pressurizing variable throttle unit 13, the air is rapidly decompressed and the dissolved air becomes fine bubbles that spread from the fine bubble water flow discharge unit 2 to the water tank 1. Further, when such an operation is stopped, the air dissolved in the water in the bubbly water flow generating means is vaporized again and stays as air because the pressure in the means disappears.

The configuration of the present invention will be described in detail below.
As a point of, the circulating water 11 discharged from the discharge part 6 of the pump 5 is branched from the circulating water discharge part 12 to the feed pipe line 3 side and the ejector part 8 side so as to flow,
In particular, the pressure is increased by the three elements of the pump 5, the pressurizing variable throttle portion 13 and the ejector portion 8. Further, as the means for pressurizing and dissolving air under high pressure, in the conventional example, the gas-liquid mixer 122 provided alternately with the spiral passages 120 and 121 provided in the relief valve 126 was the main pressurizing and dissolving of air. In the invention, the circulating water circuit portion A including the pump 5 is used for main pressure dissolution of air. That is, the flow rate Q1 on the feed pipe line 3 side and the ejector unit 8
At the side flow rate Q2, by setting Q2> Q1,
Assuming that the 2 / Q1 ratio is the number of times of circulation, by increasing the number of times of circulation, air can be sufficiently melted under pressure. In addition, the circulating water circuit section A also has a buffer effect for reducing the air entrainment of the pump 3. That is, this is because the pressure-melted air is likely to stay in the circulating water circuit unit A even if it is regasified.

Next, the second point is that when the water 4 in the water tank 1 is drained and refilled, that is, as a structure for reducing the adverse effect of the air staying in the return pipe line 17 that occurs in general use, A variable pressure restricting portion 13 for pressurization that can make the restricting area S2 (for discharging air-mixed water) larger than the restricting area S1 (for dissolving air under pressure) provided in the pipeline 3 is provided. When the pump 5 operates, the return line 1
The air accumulated in 7 flows into the pump 5. This air stays in the pump 5, that is, since the throttle area S1 of the pressurizing variable throttle portion 13 is small, the amount of water to be fed is small and the pump 5
The air that has flowed in is discharged only gradually. This means that the pump 5 operates for a long time in the air-only state,
This causes the durability to deteriorate significantly. Further, it becomes impossible to increase the pressure of the pump 5, the circulating water circuit unit A and the feed pipe line 3. However, the configuration in which the variable pressurizing portion 13 for pressurization of the present invention is provided, and the restricting areas S1 and S2 of the variable pressurizing portion 13 for pressurization are S2> S1, preferably S2 >>>> S1,
Even if the air staying in the return conduit 17 flows into the pump 5 by setting the resistance S2 to a small value, the air is immediately discharged due to the large flow rate. Although a part of the discharged air-mixed water is recirculated in the circulating water circuit section A, most of it flows to the pressurizing variable throttle section 13 side of the feed pipe line 3 having a low resistance, and easily flows from the fine bubbling water flow discharge section 2. Is ejected. Therefore, the pump 5 is brought into a normal operating state in a short time, and when the throttle area of the pressurizing variable throttle portion is set to S1, it becomes possible to increase the pressure immediately, and the air introduced from the opened air inflow device 15 is almost instantaneously. It is melted under pressure, and the initial generation time of fine bubbles can be made more stable and faster.

Next, the operation of the characteristic part of the present invention will be described with reference to the flow chart of FIG. 2 for the processes S-1 to S-6. When the operation switch of S-1 is set to [ON],
First, the pump 5 of S-2 is operated. S-2 pump 5
Is activated, the process proceeds to S-3, and the pressurizing variable throttle unit 13
Is operated to a throttle area S2 (for discharging air-mixed water). S
-3, when the pressurizing variable diaphragm unit 13 is set to S2, S-
4, the set time timer is activated. The set time at this time varies depending on the amount of staying air, but is preferably about 5 to 30 seconds. When the timer Δt = t1 of S-4 elapses, the process proceeds to S-5, and the pressurizing variable throttle portion 13 is operated to the throttle area S1 (for air pressure melting). When the pressurizing variable throttle unit 13 of S-5 is set to S1, the process proceeds to S-6, and the air inflow device 15 is controlled to be turned on (valve open).

As a result, the air flowing into the circulating water circuit section A becomes pressurized dissolved air in the water as described above,
At the moment of being discharged from the pressurizing variable throttle portion 13 flowing through the feed pipe line 3, the pressure is instantly reduced and fine bubbles are generated to generate a fine bubble water flow discharge portion 2
That is, the fine bubbly water flow is generated in the water tank 1 by discharging from the water.

FIG. 3 shows a second embodiment of the present invention.
The difference from the first embodiment is the control means 18, which has the following control functions in addition to the control functions in the first embodiment, and the other configurations and operational effects are exactly the same, so a detailed description will be given. Omit it.

Next, the processes S-7 to S- for the second embodiment will be described.
In the flowchart of FIG.
7 operation switch from [ON] to S-12 air inlet 1
Since the control for opening 5 to start the operation for generating the bubbly water flow is the same as that in FIG. 2, the description thereof will be omitted. When the operation switch for S-13 is turned off and the operation for generating the bubbly water flow is stopped, the air inflow device 15 for S-14 is turned off (valve closed).
Let When the air inflow device 15 is turned off at S-14,
The process moves to S-15, and the throttle area of the pressurizing variable throttle unit 13 is operated to S2. When the pressurizing variable throttle unit 13 is activated in S-15 in S-15, the set time timer in S-16 is activated. At this time, it is sufficient to discharge the air to be regasified and undissolved air, and since the pressure is further increased, the amount of discharged water increases, so that the setting time can be short, about 0. 5 to 10 seconds are desirable, and S-16 delays the pump 5 for a certain period of time to turn it off.
When the timer Δt = t2 of S-16 has elapsed, the routine proceeds to S-17, where the pump 5 is turned off (stopped). As a result, even after the operation is stopped, the pump 5 continues to operate for a while and then stops. Therefore, the pump 5 and the circulating water circuit unit A
Further, since it is possible to discharge the water containing the dissolved air and the undissolved air to be regasified, which is depressurized and stays in the feed pipe line 3, it is possible to increase the pressure in a short time during the restart.

FIG. 4 shows a third embodiment of the present invention.
The difference from the first embodiment is the control means 18, which has the following control functions in addition to the control functions in the first embodiment, and since the other configurations and operational effects are exactly the same, a detailed description will be given. Omit it.

Next, the third embodiment will be described with reference to the flow chart of FIG. 4 which covers the processes 18 to 23. When the operation switch of S-18 is set to [ON] to generate the bubbly water flow, the pressurizing variable throttle unit 13 is activated. In step S-19, it is checked whether or not the pressurizing variable throttle unit 13 has moved the throttle area to S2. When the movement is completed, the process proceeds to S-20, and the pump 5 is operated. When the pump 5 is operated in S-20, the process proceeds to S-21, the set time timer is activated, and it is checked whether the set time of the pump 5 has elapsed. When the set time has elapsed, the process proceeds to S-22, and it is checked whether or not the pressurizing variable throttle unit 13 has moved to S1. When the movement is completed, the process proceeds to S-23, and the air inflow device 15 is opened and turned on. In this way, the pressurizing variable throttle unit 13
By adding the function of checking the throttling areas S1 and S2, it is possible to ensure the generation of the fine bubbly water flow.

FIG. 5 shows a fourth embodiment of the present invention.
The second embodiment is improved, and the control flow of the control means 18 is the same as that shown in FIG. 3 and has the following control function. The description is omitted.

Next, the fourth embodiment will be described with reference to the time chart of FIG. 5. When the operation switch is turned on to generate the bubbly water flow, the pump 5 is started and the pressurizing variable throttle unit 13 is throttled at the same time. Move the area to S2. Then, when the time from the movement of the throttle area S2 to the switching to the throttle area S1 at this time is set to Δt = t1 and the operation switch is turned off to stop the operation of generating the bubbly water flow, the air inflower 15 is closed. At the same time, the variable pressurizing diaphragm 13 switches to the diaphragm area S2. Then, when the time from the movement of the throttle area S2 of the pressurizing variable throttle unit 13 to the stop operation of the pump 5 at this time is Δt = t2, the relationship of t1> t2 is satisfied, and further, the minimum time of t2, that is, By simultaneously switching the pressurizing variable throttle unit 13 to S2 and stopping the pump 5, the usage time of the pump 5 can be reduced as much as possible, durability can be improved, and control can be simplified.

Although not shown in the drawings, in the schematic configuration diagram shown in FIG. 1 of the present invention, in the present embodiment, the fine bubbling water flow discharge part 2 and the outflow part 16 are separately configured.
An integrated structure is also possible, and the same effect can be obtained. Further, although the description has been given with the case where the pressurizing variable throttle portion 13 is provided in a part of the feed pipe line 3, the same operational effect can be obtained even if it is integrated with the fine bubbling water flow discharge portion 2. Further, the water inflow portion 9 and the air inflow portion 10 provided in the ejector portion 8 have been described as different configurations, but the air inflow portion 10 is replaced by the ejector portion 8.
Even if it is provided between the water inflow portion 9 and the resistance portion 14, the same effect can be obtained. Lastly, the description has been given of the case where the resistance portion 14 is provided on the downstream side of the water inflow portion 9 of the ejector portion 8. However, the water inflow portion 9 is also used as the resistance portion 14, or the return pipe line 17 connecting to the water inflow portion 9 is used. Even if the pipe diameter is reduced, the same effect can be obtained. Therefore, the present invention is not limited to the schematic configuration diagram of FIG. 1, and the above configuration is also within the scope of the present invention.

[0031]

As has been made clear by the above explanation,
Claim 1 in the control device of the bubbly water flow generator of the present invention.
Then, at the start of the pump operation, the control means increases the opening of the throttle area of the pressurizing variable throttle part to operate for a certain period of time, and in particular, causes the air staying in the return pipe to be discharged from the pump in a short time. After that, since the opening of the throttle area is made small, it is possible to increase the pressure of the pump, the circulating water circuit section and the feed pipe line in a short time.

Further, according to a second aspect of the present invention, the control means closes the air inflow device when the operation switch is turned off, then enlarges the opening of the throttle area of the variable throttle portion for pressurization and operates for a certain period of time. Since the operation of the pump is stopped after the operation, the water containing the dissolved air and the undissolved air to be regasified after the operation of generating the bubbly water flow in the pump, the circulating water circuit section A and the feed pipe line are discharged. It is possible to increase the pressure of the feed pipe line and the like in a short time at the time of re-operation, and combine with the action at the start of operation to speed up the start-up of the device.

Further, in claim 3 of the present invention, the control means changes the throttle area of the variable pressurizing portion for pressurization according to claim 1, and the operation start of the pump corresponding to the switching of the throttle area in the variable throttle portion for pressurization. Since the time is confirmed, the generation of fine bubbly water flow can be ensured.

Further, in claim 4 of the present invention, the control means is
After switching the throttle opening of the pressurizing variable throttle unit from large to small even after a predetermined time from the operation of the pump at the start of operation, after switching the throttle opening of the pressurizing variable throttle unit from small to large at the time of operation stop Since the time for stopping the pump is shortened, the durability of the pump can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a controller for a bubbly water flow generator according to the present invention.

FIG. 2 is an operation flowchart of the control device.

FIG. 3 is an operation flowchart of a control device showing a second embodiment of the control device.

FIG. 4 is an operation flowchart of a control means showing a third embodiment of the control device.

FIG. 5 is a schematic time chart of control means showing a fourth embodiment of the control device.

FIG. 6 is a system configuration diagram showing a conventional jet bath device.

FIG. 7 is a sectional view of a shuttle valve of a conventional jet bath device.

FIG. 8 is a sectional view of a relief valve of a conventional jet bath device.

[Explanation of symbols]

 1 Water Tank 2 Micro Bubble Water Flow Discharge Unit 3 Feed Pipe Line 5 Pump 6 Discharge Unit 7 Return Portion 8 Ejector Unit 9 Water Inflow Portion 10 Air Inflow Portion 12 Circulating Water Discharge Portion 13 Pressurizing Variable Throttle Portion 14 Resistance Portion 15 Air Inflower 17 Return line 18 Control means

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kazuo Kubo 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Yukinori Ozaki 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Yu Kawai, 1006 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (72) Kunio Nakamura, 1006, Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A water tank, a feed pipe line connected to a fine bubbling water flow discharge unit provided in the water tank, a return pipe line connected to an outflow unit for discharging water in the water tank, and a pump for circulating water in the water tank. A circulating water circuit part that is connected between the discharge part and the return part of the pump, and is connected to a feed line to form a circulating water discharge part, and a circulating water circuit part that circulates a part of the water from the circulating water discharge part. A water inflow part provided between the circulating water discharge part and the return part of the circulating water circuit part and connected to the return pipe line, an air inflow part connected to an air inflow device, and both the inflow parts communicate with each other to circulate An ejector part having a negative pressure part that produces a negative pressure action by water, a resistance part for letting water and air into negative pressure from the ejector part, the circulating water discharge part, and a fine bubble water flow discharge part provided in a water tank are included. The variable pressurization throttle provided in the feed line and the operation of the pump. Before or after the start of operation, the throttle area of the pressurizing variable throttle section is set to a large value, and after a lapse of a predetermined time from the start of operation of the pump, the throttle area is set to a small setting and the air inlet is opened. A controller for a bubbly water flow generator equipped with a control means for performing the above. 2. The control means closes the air inflow device and switches the throttle area of the pressurizing variable throttle portion from small to large, and stops the operation of the pump after a lapse of a predetermined time. Control device for bubbly water flow generator. 3. The control device for the bubbling water flow generator according to claim 1, wherein the control means has a function of switching between a large area and a small area of the pressurizing variable throttle section and checking the passage of a predetermined time. . 4. The control means changes the throttle opening of the pressurizing variable throttle unit from a small one after a predetermined time from the start of operation of the pump until the throttle opening of the pressurizing variable throttle unit is switched from a large one to a small one. The control device for the bubbly water flow generator according to claim 2, wherein a predetermined time from switching to a large value and stopping the pump is shortened.