JPH05305116A - Bubble water flow generator - Google Patents

Abstract

PURPOSE:To produce high pressure water efficiently with a smaller circulation pump while generating fine bubbles with a reduction in the pressure of high pressure water having air dissolved. CONSTITUTION:In the generation of fine bubbles, a flow from a circulation pump 33 runs to a bypassing path 43 to produce high pressure water with the action of an elector 42 and the water is sent to a fine bubble generation means through a feed pipe 56 to decompress so that fine bubbles are generated. At this point, a resistance of a downstream side piping of the bypassing path 43 to the circulation pump 33 from the ejector 42 is so arranged to be smaller than that of an upstream side piping of the bypassing path 43 from the circulation pump 33 to the ejector 42. Thus, a pressure difference increases between the inlet and outlet of the ejector thereby enabling the generation of fine bubbles with a smaller pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble water flow generator having a function of generating bubbles in a water tank by circulating water with a pump.

[0002]

2. Description of the Related Art A conventional bubble bath device has a structure as shown in FIGS. That is, a pump unit 4 provided with a pump 3 for circulating the hot water 2 in the bath 1, a hot water inhaler 6 connected to a suction side conduit 5 of the pump 3 and a discharge side conduit 7 of the pump 3. The nozzle unit 11 includes a low-pressure jet nozzle 9 and a high-pressure jet nozzle 10 that are branched and connected via a two-way valve 8. A jet passage 12 is provided in the suction side pipeline 5 of the pump 3, and a shuttle valve 13 is provided from the discharge side pipeline 7 to the jet passage 12.
The branch pipe line 14 is piped through. The shuttle valve 13 includes a conical valve 16 biased by a spring 15,
The conical valve 16 includes a valve rod 17, an air intake passage 18, and an air passage 19. On the other hand, the high pressure jet nozzle 10 includes a gas-liquid mixer 22 having spiral passages 20 and 21 alternately, a relief valve 2 having a valve body 24 and a jet discharge port 25 biased by a spring 23.
It is composed of 6. Further, the low-pressure jet nozzle 9 includes a hot water flow passage 27 and an air inflow passage 28 formed on the outer periphery of the flow passage 27. A thin passage 29, a wide chamber 30, and a nozzle 31 are provided downstream of the flow passage 27. It is configured. Further, the air inflow passage 28 communicates with the wide chamber 30 via the narrow passage 32.

Next, the operation will be described. During the operation of generating fine bubbles, when the pump 3 is operated in FIG. 5, the warm water 2 is sucked from the inhaler 6 to the pump 3 via the suction side conduit 5, and then the high pressure jet nozzle from the pump 3 via the discharge side conduit 7. Fine bubbles are ejected from 10. At this time, the discharge pressure of the pump 3 acts on the branch circuit 14 to increase the discharge pressure, and the conical valve 16 connected to the valve rod 17 overcomes the biasing force of the spring 15 to open the conical valve 16. As a result, the air is sucked into the jet passage 12 through the air intake passage 18, the conical valve 16 and the air passage 19 and is sucked into the pump 3. The sucked air is melted under high pressure by the pump 3,
It is sent from the discharge side pipe line 7 to the high pressure jet nozzle 10. On the other hand, during the operation of generating large bubbles, the two-way valve 8 in FIG. 5 is switched,
Hot water from the pump 3 is jetted from the low-pressure jet nozzle 9 to the bathtub 1 (for example, Japanese Patent Publication No. 3-14464).

[0004]

However, in the above-mentioned conventional structure, a large-sized pump for pressurizing and melting at a high pressure is required, so that the cost is high. The present invention is to solve the above problems, and an object of the present invention is to provide a bubble water flow generator that generates fine bubbles and large bubbles with a small pump, and efficiently pressurize hot water to a high pressure with a small pump. Is.

[0005]

In order to achieve the above object, the present invention circulates water in a water tank, a bubble ejecting device provided in the water tank, which includes fine bubble generating means and large bubble ejecting means, and water in the water tank. A circulation pump, a forward pipe that is piped from the discharge side of the circulation pump to the bubble ejection device, a return pipe that connects the water tank and the suction side of the circulation pump, and a bypass passage for the forward and return pipes of the circulation pump. An ejector and a switching means provided on the suction side of the circulation pump, for switching the suction direction to the circulation pump to the ejector side and the return pipe side,
The suction pipe is connected to the ejector from the upstream side of the switching means, and the air introducing means is provided between the ejector and the atmosphere via the air control means.The downstream side pipe resistance of the bypass path from the ejector to the circulation pump is reduced. The resistance is smaller than the upstream piping resistance of the bypass passage from the circulation pump to the ejector.

[0006]

According to the present invention, with the above configuration, the suction direction to the circulation pump is switched to the ejector side,
By the suction and pressurizing action of the ejector, the water in the water tank is sucked from the suction pipe, and the high-pressure water in which the air is dissolved is discharged to the circulation pump discharge side by sucking the air from the air introduction means. The high-pressure water is decompressed by the fine bubble generator to generate fine bubbles.At this time, the downstream piping resistance of the bypass passage from the ejector to the circulation pump is compared with the upstream piping resistance of the bypass passage from the circulation pump to the ejector. By making it smaller, the piping resistance from the ejector to the circulation pump is reduced and the pressure loss is reduced, so that the pressurizing ability of the ejector can be enhanced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1 and FIG. 2, 33 is a circulation pump, and from the circulation pump 33 is a bath 3 which is a water tank.
A forward pipe 38 is connected to a bubble jetting device 37 having a fine bubble jetting device 35 and a large bubble jetting device 36 provided in FIG. Reference numeral 39 is an on-off valve provided in the outflow pipe 38, and 40 is a heat exchanger. Circulation pump 3 from bath 34
A return pipe 41 is connected to the pipe 3. A bypass passage 43 provided with an ejector 42 is provided from the outflow pipe 38 of the circulation pump 33 to the return pipe 41. Ejector 42
In order to make the downstream side pipe resistance of the bypass 43 from the circulation pump 33 to the circulation pump 33 smaller than the upstream side pipe resistance of the bypass 43 from the circulation pump 33 to the ejector 42, the ejector 42 is connected downstream of the bypass 43. There is.
Reference numeral 44 is a three-way valve which is a switching means for switching the suction direction to the circulation pump 33 to the ejector 42 side and the return pipe 41 side. A suction pipe 45 is provided from the upstream side of the three-way valve 44 to the ejector 42. A check valve 46 is connected to the suction pipe 45. The ejector 42 and the atmosphere are communicated with each other by an air introducing means 49 having an electromagnetic valve 47 and a check valve 48 which are air controlling means. Fine bubble generating means 35
Is composed of a small cross section flow path 52 formed when the valve body 50 and the valve seat 51 are in contact with each other, a diaphragm 53 which is an opening / closing means of the valve body 50, and a spring 54. The delivery side of the circulation pump 33 and the inlet 55 of the fine bubble generating means 34 are connected by a feed pipe 56. The large bubble jetting means 36 is composed of a water jetting nozzle 57, an air introducing means 49 and a jetting direction variable nozzle 58. 59 is a controller, 6
Reference numeral 0 is an operation panel. Reference numeral 61 is hot water, and 62 is an arrow indicating the flow direction of hot water. 63 is a fine bubble, 6
4 is a large bubble.

Next, the operation of the present invention will be described with reference to FIGS. When the fine bubbles are generated, the valve body 50 and the valve seat 51 of the fine bubble generator 35 are in the closed state as shown in FIG. The three-way valve 44 closes the return pipe 41, and the on-off valve 39 closes the forward pipe 38. When the circulation pump 33 is operated in such a state, the hot water discharged from the circulation pump 33 flows to the feed pipe 56 and the bypass passage 43 side. Ejector 4 at this time
The hot water of the return pipe 41 is sucked by the ejector 42 via the suction pipe 45 by the suction action of the solenoid valve 47.
Aspirate air through. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 33 increases, and the pressure on the discharge side of the circulation pump 33 also increases, so that the circulation pump 3
From 3, the high-pressure hot water in which the air is dissolved is sent to the inlet 55 via the feed pipe 56. The hot water sent to the inlet 55 is rapidly depressurized by being jetted from the small cross section flow passage 52. As a result, the dissolved air at high pressure becomes fine bubbles and is ejected to the bath 34. In the above operation, the flow rate of the ejector 42 to the circulation pump 33 is the sum of the flow rate of the bypass passage 43 and the flow rate of the suction pipe 45. Therefore, by connecting the ejector 42 to the downstream side of the bypass passage 43, the ejector 4
As a result of the piping resistance on the downstream side of the bypass passage 43 from 2 to the circulation pump 33 becoming smaller, the differential pressure between the inlet and the outlet of the ejector 42 becomes larger, and the pressurizing capacity of the ejector 42 can be made larger.

When a large bubble is generated, the valve body 50 and the valve seat 51 of the fine bubble generator 35 are in the open state. The three-way valve 44 closes the bypass passage 42, and the opening / closing valve 39 is the forward pipe 38.
Is closed. When the circulation pump 33 is operated in such a state, the warm water discharged from the circulation pump 33 is heated by the heat exchanger 40.
And is sent to the large bubble jetting means 36 via. The sent hot water is jetted from the water jet nozzle 57. At this time, air is sucked from the air introducing means 49 due to the negative pressure at the time of jetting. The jet from the water jet nozzle 57 shears this air and
Ejected into the bath 34 as air bubbles of ~ 5 mm. When large bubbles are generated, the warm water discharged from the circulation pump 33 is the outflow pipe 38.
Then, it is sent only to the feed pipe 56.

Next, another embodiment of the present invention will be described with reference to FIG. 65 is a circulation pump, and the circulation pump 6
An outflow pipe 67 is connected from 5 through an on-off valve 66. A bypass passage 70 provided with an ejector 69 is provided from the outflow pipe 67 of the circulation pump 65 to the return pipe 68. In order to make the bypass passage 71 piping resistance from the ejector 69 to the circulation pump 65 smaller than the bypass passage 72 piping resistance from the circulation pump 65 to the ejector 69, the bypass passage 71 has a larger diameter than the bypass passage 72. Has been done. Reference numeral 73 is a three-way valve which is a switching means for switching the suction direction to the circulation pump 65 to the ejector 69 side and the return pipe 68 side. A suction pipe 74 is provided from the upstream side of the three-way valve 73 to the ejector 69. 75
Is a check valve disposed in the suction pipe 74. Ejector 6
9 and the atmosphere are communicated with each other by an air introducing means 76. Since the operation is the same in this embodiment as well, description thereof will be omitted. In this embodiment, the bypass passage 71 having a large diameter is used to reduce the pressure loss and increase the ejector capacity.

[0011]

As described above, the bubble water flow generator of the present invention circulates the water in the water tank, the bubble ejecting device provided in the water tank, which includes the fine bubble generating means and the large bubble ejecting means. A circulation pump, a forward pipe from the discharge side of the circulation pump to the bubble jetting device, a return pipe connecting the water tank and the suction side of the circulation pump, and an ejector provided in the bypass pipe of the forward and return pipes of the circulation pump. A switching means provided on the suction side of the circulation pump for switching the suction direction to the circulation pump to the ejector side and the return pipe side; and a suction pipe connected to the ejector from the upstream side of the switching means,
It consists of an ejector and an air introduction unit that is provided with the atmosphere via an air control unit, and the piping resistance on the downstream side of the bypass path from the ejector to the circulation pump is smaller than the piping resistance on the upstream side of the bypass path from the circulation pump to the ejector. With the configuration, it is possible to generate fine bubbles with a small pump, and it is possible to realize cost reduction. In addition, as a result of reducing the piping resistance of the bypass passage from the ejector to the circulation pump and reducing the pressure loss, it is possible to obtain a high pressurizing capacity with a small circulation pump.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a case where fine bubbles are generated in a bubbly water flow generator according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram of the same apparatus when large bubbles are generated.

FIG. 3 is a system configuration diagram of a bubbly water flow generator according to another embodiment of the present invention.

FIG. 4 is a system configuration diagram of a conventional jet bath device.

FIG. 5 is a sectional view of a shuttle valve of the same device.

FIG. 6 is a sectional view of a gas-liquid mixer and a relief valve of the same device.

FIG. 7 is a sectional view of a large bubble generating nozzle of the same device.

[Explanation of symbols]

 33 Circulation Pump 34 Water Tank (Bath) 35 Micro Bubble Generation Means 36 Large Air Bubble Generation Means 37 Bubble Ejection Device 38 Forward Pipe 41 Return Pipe 42 Ejector 43 Bypass Passage 44 Switching Means (Three-way Valve) 45 Suction Pipe 47 Air Control Means (Solenoid Valve) ) 49 air introduction means

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

Claims (1)

[Claims] 1. A water tank, a bubble jetting device provided in the water tank, comprising fine bubble generating means and large bubble jetting means, a circulation pump for circulating water in the water tank, and the bubble jetting from a discharge side of the circulation pump. A forward pipe that is piped to the device, a return pipe that connects the water tank and the suction side of the circulation pump, an ejector that is provided in a bypass passage of the circulation pump forward pipe and the return pipe, and a suction side of the circulation pump. Switching means for switching the suction direction to the circulation pump to the ejector side and the return pipe side, a suction pipe connected to the ejector from the upstream side of the switching means, and the air control means for the ejector and the atmosphere. And an air introducing unit provided via the downstream side pipe resistance of the bypass passage from the ejector to the circulation pump, Bubble flow generating apparatus having a small compared to the upstream side piping resistance of the bypass path to the injector.