JPH06254128A - Bubble generating nozzle device - Google Patents

Abstract

PURPOSE:To generate fine bubbles stably by forming a very small section passage by a valve element, a valve seat and a cylindrical projections. CONSTITUTION:When water flows into a pressurizing chamber of the interior of a fine bubble generating means 44 in the inside of a bubble generating nozzle device 28 to reach fixed pressure or more, a diaphragm 59 pushes and contracts a spring 60 to increase the pressure in a buffer chamber 63. The pressure in the buffer chamber 63 is transmitted to a conflux part 64 through a pressure introducing pipe 65. Thus, the pressure in the buffer chamber 63 is decreased so that the valve element 57 is closed at the valve seat 55. At this time, the valve element 57 and the valve seat 55 are brought into contact with each other through a projection 66 to form a very small section passage 79. That is, the very small section passage 79 comprising the valve element 57, the valve seat 55 and the cylindrical projection 66 is formed to allow water to pass therethrough. Thus, fine bubbles can be generated stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble generating nozzle device for generating bubbles in a water tank.

[0002]

2. Description of the Related Art A conventional bubble generator of this type is shown in FIG.
As shown in FIG. 11, a pump unit 4 having a pump 3 for circulating the hot water 2 in the bath 1 and an inhaler 6 for the hot water 2 in the bath 1 connected to a suction side conduit 5 of the pump 3. And a nozzle unit 11 provided with a low-pressure jet nozzle 9 and a high-pressure jet nozzle 10, which are branched and connected to the discharge side pipe line 7 via a three-way valve 8. The high pressure jet nozzle 10 is opened and closed by the pressure inside the discharge side pipe 7 passage of the high pressure jet nozzle 10 shown in FIG. 10 in order to decompress the water obtained by pressurizing and dissolving the air in the hot water 2 to generate a fine bubble jet. Valve body 12 and a spring 13 for urging the valve body 12
And a relief valve 14 composed of
The relief valve 14 was opened to generate a fine bubble jet when the inside of the discharge side pipe 7 reached a predetermined pressure. The low-pressure jet nozzle 9 has a flow passage 15 for the hot water 2, as shown in FIG. 11, in order to generate a jet bubble jet.
An air inflow passage 16 provided on the outer periphery of the flow passage 15 is provided, and the hot water 2 passing through the flow passage 15 is introduced into the wide chamber 18 from the narrow passage 17. In addition, the air inflow passage 16
The air that has passed through flows into the chamber 18 through the narrow flow path 19 and
8 was mixed with the warm water 2 and discharged from the nozzle 20 as a jet bubble jet (Japanese Patent Publication No. 3-144).
No. 64).

[0003]

However, in the above-mentioned configuration, since fine bubbles are generated in the gap between the valve body 12 and the inside of the discharge side conduit 7, the discharge side conduit 7 is formed.
There is a problem in that the balance of water pressure and spring force changes due to the flow of water flowing inside, the gap between the inside of the discharge side conduit 7 and the valve body 12 is not kept constant, and fine bubbles are not stably generated. there were.

Further, the spring 13 must be designed so that the valve body 12 is brought into contact with the relief valve 14, and the relief valve 14 must be designed to keep the pressure in the high-pressure jet nozzle constant. It was difficult to determine the shape of the seat.

When the discharge flow rate further decreases, the valve body 12 comes into contact with the discharge pipe line 7, the gap between the valve body 12 and the discharge pipe line 7 becomes small, and even minute dust tends to be clogged.

The present invention solves the above-described conventional problems, and maintains a constant distance between the valve seat and the valve body and stably closes the valve seat and the valve body to stabilize the fine bubbles. The first purpose is to generate it. The second purpose is to reduce the number of contact portions and to prevent dust from clogging between the valve seat and the valve body when the valve seat and the valve body are opened and then closed again. is there. A third object is to improve workability by forming a simpler shape and to generate stable fine bubbles at low cost.

[0007]

In order to achieve the above-mentioned first object, the present invention has a valve seat provided in a portion through which water passes, a valve body provided facing the valve seat, a valve seat or a valve. It is composed of a plurality of protrusions provided on the body.

Further, in order to achieve the second object, the projections are hemispherical. Furthermore, in order to achieve the third object, the projection is cylindrical.

[0009]

According to the first aspect of the present invention, the valve element and the valve seat are brought into contact with each other while keeping a constant distance in a stable state.
At this time, a minute flow path is formed. When water in which air is pressure-dissolved is passed through this flow path and water in which air is pressure-dissolved is rapidly depressurized, fine bubbles are generated. In addition, a large flow path is formed by opening the valve body and the valve seat.
This makes it possible to remove dust even if it is clogged with dust.

In the second and third aspects of the invention, since the above-described configuration has no corners or few corners, it is difficult for dust to be caught, and dust is washed away without causing clogging. Also, even if the valve seat and valve body are opened and then closed again, the valve seat and valve body are closed via the projection body without catching dust because there are few parts of the projection body that contact the valve seat or valve body. Then, a stable minute flow path is formed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. Reference numeral 21 denotes a circulation pump, and a discharge side 22 and a suction side 23 of the circulation pump 21 are connected by a branch circuit 26 via a three-way valve 24 and an ejector 25. A bubble generating nozzle device 28 is attached to the water tank 27. From the discharge side 22 to the bubble generating nozzle device 28, a main discharge conduit 29 is connected via a solenoid valve 30 and a heat exchanger 31, and from the discharge side 22 the bubble generating nozzle device 28.
A sub-discharging pipe line 32 is provided through the check valve 33 and the tank 34. Further, a check valve 35 is provided between the main discharge pipeline 29 on the downstream side of the heat exchanger 31 and the auxiliary discharge pipeline 32 on the downstream side of the tank 34. In addition, the bubble generation nozzle device 2
A return line 36 is connected to 8 and is connected to one end of the three-way valve 24.

A three-way valve 24 is connected between the suction side 23 of the circulation pump 21, the branch circuit 26 and the return line 36. From the three-way valve 24 to the negative pressure portion 37 of the ejector 25
A suction line 38 is connected to. Further, the negative pressure portion 37 of the ejector 25 is connected to an air solenoid valve 41 via a sub air suction pipe 39 and a constant air amount suction governor 40.
An air filter 42 is connected to the air solenoid valve 41.

On the other hand, the bubble generating nozzle device 28 includes a nozzle body 43, a fine bubble generating means 44 provided inside the nozzle body 43, a jet nozzle 45 provided downstream of the fine bubble generating means 44, and a jet flow. A jet guide 46, which is provided on the downstream side of the nozzle 45, a jet port 47 whose jetting direction is variable, and a nozzle cap 48 are provided. 49
Is a flange for fixing the nozzle adapter bath, and the jet guide 46 can be attached thereto. Fifty, five
Reference numerals 1, 52 and 53 respectively denote a main discharge pipe line connection port, a sub discharge pipe line connection port, a main air suction pipe connection port, and a return pipe line connection port.

Further, the fine bubble generating means 44 includes a nozzle unit 54 and a valve seat 55 provided in the nozzle unit.
A first collision wall 56 provided on the valve seat 55, a valve body 57 provided on the downstream side facing the valve seat, a valve shaft 58 connected to the valve body 57, and a valve. A diaphragm 59 connected to the shaft, a spring 60 provided to open the valve seat 55 and the valve body 57, a valve shaft guide 61 for suppressing swing of the valve shaft 58, and a second collision wall 62. It is composed of. Further, the valve shaft 58 and the valve body 57 are provided with a pressure introducing pipe 65 that connects the buffer chamber 63 and the merging portion 64 provided upstream of the jet nozzle 45. Further, the valve body 57 is provided with three columnar projections 66 facing the valve seat 55.

A main air suction pipe 67 and an air solenoid valve 68 are connected to the main air suction pipe connection port 52.

Reference numeral 69 is a controller, and 70 is a switch for turning on / off the bubble ejection or switching the type of bubble. Reference numeral 71 is water in the water tank 27, and solid-line arrows 72 and 73 in FIGS. 3 and 4 are arrows showing the flow of water when normal bubbles or fine bubbles are generated, respectively. Figure 3
The white arrows 74 and 75 in FIG. 4 are arrows showing the flow of air when normal bubbles or fine bubbles are generated, respectively. Reference numeral 76 is a normal bubble having a bubble diameter of about 2 to 5 mm, and 77 is a fine bubble having a bubble diameter of about 10 to 20 microns. In this embodiment, the fine air bubble generating means 44 includes the valve seat 5
5 and the valve body 57 are open, a large cross-section flow path 78 is formed, and the valve seat 55 and the valve body 57 are three cylindrical projections 66.
When it is closed via, the minute cross-section flow path 79 is formed.

The operation of the above configuration will be described. First, the operation at the time of ejecting bubbles having a bubble diameter of 2 to 5 mm will be described with reference to FIGS. 1 and 3. The switch 70 is "large" in a state where all are not operating and the circulation pump 21 is filled with water. When the button is pressed, the circulation pump 21 is operated by the controller 69. When the circulation pump 21 operates, the water discharged from the circulation pump 21 flows through the solenoid valve 30, the heat exchanger 31, the main discharge pipe line 29, and the main discharge pipe line connection port 50,
It passes through the confluence portion 64 and is ejected from the jet nozzle 45.
On the other hand, on the other hand, it is ejected from the jet nozzle 45 through the check valve 35, the auxiliary discharge pipe 32, the auxiliary discharge pipe connection port 51, the merging portion 64, the gap between the valve seat 55 and the valve body 57. It
At the same time, when the air solenoid valve 68 is opened, the air passing through the main air suction pipe 67 and the main air suction pipe line connection port 52 is sucked into the negative pressure portion formed by the water jetted from the jet nozzle 45. Mixed with water. The mixed air and water pass through the jet flow guide 46, and from the jet port 47 to the water tank 27.
Erupted inside. At this time, the valve body 57 is opened from the valve seat 55 by the spring 60.

The water 71 in the water tank is sucked into the circulation pump 21 and flows into the circulation pump 21 through the return pipe 36 and the three-way valve 24.

When the switch 70 is further turned off, the controller 69 is actuated, the air solenoid valve 68 is closed, and the circulation pump 21 is stopped.

Next, the operation when jetting fine bubbles will be described with reference to FIGS. When the "fine" button of the switch 70 is pressed from the state where all are not operating, the solenoid valve 30 of the main discharge conduit 29 is closed by the controller 69, the air solenoid valve 41 is opened and closed according to the set time, and the three-way valve 24 Closes the return pipe and opens the ejector 25 side, and the circulation pump 21 is further operated. Circulation pump 2
When 1 is operated, the water discharged from the circulation pump 21 flows to the auxiliary discharge pipe line 32 and also to the branch circuit 26 as indicated by the solid arrow 73. At this time, the ejector 2
5 functions, and the water 71 of the water tank 27 is sucked from the suction circuit 38 to the negative pressure portion 37 of the ejector 25 through the return pipe 36 and flows into the circulation pump 21. When the water 71 in the water tank 27 is sucked into the suction side 23 of the circulation pump 21, the circulation pump 2
The pressure on the suction side 23 of No. 1 increases. When the circulation pump 21 is operated in this state, the pressure on the discharge side 22 is greatly increased. Because, when water flows into the pressurizing chamber 81 inside the fine bubble generating means 44 inside the bubble generating nozzle device 28 and becomes a certain pressure or more, the diaphragm 59 compresses the spring 60, and the pressure in the buffer chamber 63 is reduced. To rise. However, the pressure in the buffer chamber 63 passes through the pressure introducing pipe 65,
4 is transmitted. As a result, the pressure in the buffer chamber 63 is reduced and the valve element 57 is closed on the valve seat 55.
At this time, the valve body 57 and the valve seat 55 are brought into contact with each other via the projection body 66 to form a minute sectional flow passage 79. That is, the valve body 57,
A minute cross-section flow path 79 composed of the valve seat 55 and the columnar protrusion 66 is formed, and water flows therethrough. Since the flow of water is rapidly reduced in the minute cross-section flow path 79, the circulation pump 21 operates in a state close to the deadline operation. Therefore, since the pressure on the suction side 23 rises and the shut-off pressure of the circulation pump 21 is added, a large pressure rise can be obtained. In such operating conditions,
When the air solenoid valve 41 is opened, the air is outlined by arrow 73.
As shown by (4), it is sucked by the negative pressure portion 37 of the ejector 25 through the sub air suction pipe 39 through the air filter 42, the air solenoid valve 41, and the constant air amount suction governor 40. The sucked air enters the circulation pump 21 from the suction side 23 through the ejector 25 and the branch circuit 26, and the auxiliary discharge line 3
2 to the bubble generating nozzle device 28. At this time, in the sub discharge pipe 32, the air sucked due to the high pressure is under pressure and dissolved in water. Water with air dissolved
Minute cross-section flow path 7 formed when the valve body 57 and the valve seat 55 of the fine bubble generating means 44 of the bubble generating nozzle device 28 are brought into contact with each other.
Eject from 9. The jetted water collides with the first collision wall 56 as soon as the pressure is reduced. Furthermore, the first collision wall 56
The water that has collided with collides with the second collision wall 62. The water that has collided with the first collision wall 56 and the second collision wall 52 is rapidly decompressed and then disturbed, so that the dissolved air suddenly becomes fine bubbles 77 and flows into the confluence portion 64. Further, the fine bubbles 77 pass through the jet nozzle 45, the mixing section 80, and the jet guide 46, and are jetted into the water tank 27 from the jet port 47. The water in the bathtub 27 passes through the return pipe 36, the suction pipe line 38, the ejector 25, the branch circuit 26, and the three-way valve 24 and returns to the circulation pump 21.

When the switch 70 is further turned off, the controller 69 operates to stop the circulation pump 21.
Then, the branch circuit 26 side of the three-way valve 24, the air solenoid valve 41 are closed, and the solenoid valve 30 is opened. At this time, the pressurizing chamber 8
The pressure in 1 drops and the force of the spring 60 causes the valve element 57 to
Is pushed back, and the minute sectional flow passage 79 formed by the valve element 57 and the valve seat 55 is switched to the large sectional flow passage 78.

When switching from the state of ejecting fine bubbles to the state of ejecting bubbles of 2 to 5 mm, or when switching from the state of ejecting bubbles of 2 to 5 mm to the state of ejecting fine bubbles, the respective operating states are stopped. After that, the next bubble is ejected.

Next, a second embodiment will be described with reference to FIGS. 7 and 8. In the second embodiment, as shown in FIG. 8, three hemispherical projections 82 are used instead of the three cylindrical projections 66 shown in the first embodiment. Since it is a hemispherical projection, it contacts at three points when forming the minute flow path cross section 79, and the valve seat and the projection are in contact with each other at a minute contact surface, so that the minute flow path 78 is minute. When changing to the flow path cross section 69, it is possible to switch without interposing dust or the like existing near the valve body 57 and the valve seat 55. Other operations are the same as those in the first embodiment and will not be described.

According to the above first and second embodiments, the following effects can be obtained. By switching the flow path of the three-way valve 24 and opening / closing the solenoid valve 30, the air solenoid valve 41, and the air solenoid valve 68, the normal bubble 76 and the fine bubble 77 can be automatically switched. Further, the valve body 57 is attached to the valve seat 55.
Since the spring 60 and the diaphragm 59 are used to open and close, the cost can be reduced. Further, when a fine bubble is generated, a large flow path is automatically switched to the minute cross-section flow path 79, so that clogging of dust can be automatically eliminated, and it is not necessary to provide a dedicated cleaning mechanism. Further, even if the user neglects to perform the cleaning, the normal (jet) bubbles can be used for the automatic cleaning, so that the user does not need to perform a troublesome operation.

[0025]

As described above, according to the bubble generating nozzle device of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, since the sense of the valve body and the valve seat is determined by the height of the protrusion of the protrusion due to the above-described configuration, the valve body and the valve seat are always stable and kept at a certain distance. Contacted.

In addition, the second aspect of the present invention has the above-mentioned configuration, and since there are no corners, there is no portion on which dust is caught and dust clogging can be eliminated. Further, since the contact area is minimized, it is possible to prevent dust from being caught when the valve seat and the valve body come into contact again after opening.

Further, the third invention has the above-mentioned structure.
It can be realized at low cost without complicated processing.

[Brief description of drawings]

FIG. 1 is a sectional view of a bubble generating nozzle device in a normal bubble generating state according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a bubble generation nozzle device in the same device in which fine bubbles are generated.

FIG. 3 is a system circuit diagram showing an operating state of normal air bubble generation of the device.

FIG. 4 is a system circuit diagram showing an operation state of generation of fine bubbles in the device.

FIG. 5 is an exploded perspective view of a nozzle unit of the same device.

FIG. 6 is an enlarged perspective view of a valve body and a projection body of the same device.

FIG. 7 is an exploded perspective view of a nozzle unit according to a second embodiment of the present invention.

FIG. 8 is an enlarged perspective view of a valve body and a projection body of the same device.

FIG. 9 is a block diagram of a conventional bubble generator system.

FIG. 10 is a sectional view of a fine bubble generating nozzle device of the same device.

FIG. 11 is a sectional view of a normal bubble generating nozzle device of the same device.

[Explanation of symbols]

 55 Valve Seat 56 First Collision Wall 57 Valve Disc 62 Second Collision Wall 66 Protrusion (Cylindrical) 79 Micro Section Flow Channel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunio Nakamura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Tsunehiro Yoshida, 1006 Kadoma, Kadoma City, Osaka 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 (3)

[Claims] 1. A bubble generating nozzle device for generating bubbles by decompressing water in which gas is pressurized and dissolved, and a valve seat provided in a portion through which the water passes, and a valve provided opposite to the valve seat. A bubble generating nozzle device comprising a body and a plurality of projections provided on the valve seat or the valve body. 2. The bubble generating nozzle device according to claim 1, wherein the projection has a hemispherical shape. 3. The bubble generating nozzle device according to claim 1, wherein the projection has a cylindrical shape.