JP3368610B2 - Bubble generating nozzle - Google Patents

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. 9, 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. 8 in order to depressurize the water obtained by pressurizing and dissolving the air in the hot water 2 to generate a fine bubble jet. A relief valve 14 including a valve body 12 that operates and a spring 13 that biases the valve body 12 is provided, and the relief valve 14 is provided when the inside of the discharge side pipeline 7 reaches a predetermined pressure.
It opened and a fine bubble jet was generated.
The low-pressure jet nozzle 9 includes a flow passage 15 for the hot water 2 and an air inflow passage 16 provided on the outer periphery of the flow passage 15 to generate a jet bubble jet, as shown in FIG.
The warm water 2 passing through the flow passage 15 is introduced into the wide chamber 18 from the narrow passage 17. Further, the air that has passed through the air inflow passage 16 flows into the chamber 18 from the narrow flow path 19, is mixed with the warm water 2 in the chamber 18, and is discharged from the nozzle 20 as a jet bubble jet (Japanese Patent Publication No. 3-14464). Issue).

[0003]

However, in the above-mentioned structure, since the fine bubbles are generated in the gap between the valve body 12 and the inside of the discharge side conduit 7, the problem that the fine bubbles cannot be efficiently generated. was there. Also stopper
The flow path of the conical valve is made by interposing a butterfly pressure spring between the valve and the conical valve.
It is composed of a constant pressure holding valve nozzle that is elastically pressed to the discharge port of
There was a possibility that dust would get stuck .

The present invention solves the above-mentioned problems of the prior art by eliminating a lot of fine bubbles while eliminating dust clogging.
The first purpose is to make it. A second object is to efficiently generate fine bubbles with a simple structure. A third object is to further increase the collision area and increase the amount of fine bubbles generated at low cost.

[0005]

Means for Solving the Problems] To achieve the first object, a valve seat provided in a portion through which water, a valve body provided on the downstream side of the valve seat opposite the valve seat, wherein The valve body and the valve seat
The minute cross-sectional flow path that is formed only when the
It is composed of a first collision wall against which water ejected from the cross-section flow channel collides, and a second collision wall located downstream of the first collision wall and colliding against the first collision wall again. .

Further, in order to achieve the second object, the shape of the second collision wall is disc-shaped, and the second collision wall and the valve body are positioned concentrically.

Further, in order to achieve the third object, the diameter of the second collision wall is made larger than the diameter of the valve body.

[0008]

According to the first aspect of the present invention, with the above-described structure, when the valve body and the valve seat are closed, the minute cross section flow passage and the first collision wall are formed. When water is passed through the flow path and the pressure-dissolved water is rapidly depressurized, fine bubbles are generated. However, the amount of fine bubbles generated is small. However, the water that has passed through the microchannel is the first collision wall,
When it collides with the second collision wall, the flow of water is disturbed and a large amount of fine bubbles are generated. On the other hand, when the valve seat and valve body are opened
In the unlikely event that the micro flow path and the first collision wall disappear,
Pressurized even if dust is clogged near the flow path and the first collision wall
By passing water that does not dissolve, dust clogging is eliminated
It

[0009] The second invention is fine bubbles can impinging flow of water through the side of the valve body in the state of the speed in a large amount occurs.

The third aspect of the present invention has the above-mentioned structure.
Most of the water that has passed through the minute cross-section flow channel collides with the second collision wall, and a large amount of fine bubbles are generated.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. Reference numeral 21 is a circulation pump, and the discharge side 22 and the suction side 23 of the circulation pump 21 are a three-way valve 24 and an ejector 2.
It is connected by a branch circuit 26 via 5. 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, the main discharge line 29
Is connected via a solenoid valve 30 and a heat exchanger 31, and a sub-discharge pipe line 32 is connected from the discharge side 22 to the bubble generating nozzle device 28 via a check valve 33 and a tank 34. Further, the main discharge pipeline 29 on the downstream side of the heat exchanger 31
And the check valve 3 between the auxiliary discharge line 32 on the downstream side of the tank 34
5 are provided. A return pipe 36 is connected to the bubble generating nozzle device 28 and is connected to one end of the three-way valve 24. In addition, the suction side 23 of the circulation pump 21 and the branch circuit 2
A three-way valve 24 is connected between 6 and the return line 36. A suction conduit 38 is connected from the three-way valve 24 to the negative pressure portion 37 of the ejector 25. 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 / 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 which is a pressure reducing means provided inside the nozzle body 43, and a jet nozzle provided downstream of the fine bubble generating means 44. 45, a jet guide 46 provided on the downstream side of the jet nozzle 45, a jet port 47 whose jetting direction can be changed, and a nozzle cap 48. Reference numeral 49 is a nozzle adapter bathtub fixing flange to which the jet guide 46 can be attached. Reference numerals 50, 51, 52, and 53 are 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, respectively.

Further, the fine bubble generating means 44 includes a nozzle unit 54 and a valve seat 55 provided in the nozzle unit.
And a valve body provided downstream facing the valve seat.
57, the valve seat 55 provided on the downstream side of the valve seat 55 and the valve body 5
First collision wall 56 formed when 7 abuts, valve shaft 58 connected to valve body 57, diaphragm 59 connected to the valve shaft, valve seat 55 and valve body 57 are opened. A spring 60 provided to prevent the valve shaft 58 from swinging, a valve shaft guide 61 for suppressing the swing of the valve shaft 58, and a first disc having a diameter larger than the diameter of the valve body 57 provided at one end on the downstream side of the valve shaft 58. It is composed of two collision walls 62. 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 a projection 66 and a valve seat 55.
It is provided to face.

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 reference numeral 70 is a switch for turning on / off the ejection of bubbles or switching the type of bubbles. 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. 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 bubble generating means 44 has a large cross section flow passage 78 when the valve seat 55 and the valve body 57 are open.
When the valve seat 55 and the valve body 57 are closed via the projection body 66, the minute cross-section flow path 79 and the first collision wall 56 are 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 by 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 line 36 and opens the ejector 25 side, and the circulation pump 21 is further operated. When the circulation pump 21 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 25 functions, The water 71 in 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. Water 71 in the aquarium 27
When is sucked into the suction side 23 of the circulation pump 21, the pressure on the suction side 23 of the circulation pump 21 rises. 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 is transmitted to the merging portion 64 via the pressure introducing pipe 65. 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 the minute cross-section flow passage 79 and the first collision wall 56.
To be done. That is, the minute cross-section flow path 79 including the valve body 57, the valve seat 55, and the protrusion 66, and the first collision wall 56 are formed.
It is made here that water flows. This minute cross-section flow path 7
In Fig. 9, the flow of the water 71 is sharply reduced, so that 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. When the air solenoid valve 41 is opened in such an operating state, the air flows through the air filter 42, the air solenoid valve 41, and the constant air amount suction governor 40 as shown by the white arrow 73, and the sub air suction pipe 39. Through the negative pressure portion 37 of the ejector 25. The sucked air passes through the ejector 25 and the branch circuit 26, and the suction side 2
3 enters the circulation pump 21 and is sent to the bubble generating nozzle device 28 from the auxiliary discharge line 32. At this time, the auxiliary discharge line 3
In 2, the air sucked due to the high pressure is dissolved in water under pressure. The water in which the air is dissolved is used as the valve body 57 and the valve seat 5 of the fine bubble generating means 44 of the bubble generating nozzle device 28.
5 is ejected from the minute cross-sectional flow path 79 which is formed when the abutting parts 5 are brought into contact with each other. When the jetted water is decompressed, it has a valve body 57 and a valve seat 55.
To the first collision wall 56 that is formed only when the
collide. Further, the water that has collided with the first collision wall 56 collides with the second collision wall 62. The water that has collided with the first collision wall 56 and the second collision wall 62 is rapidly decompressed and then disturbed, so that the dissolved air becomes fine bubbles and flows into the confluence portion 64. Further, the fine bubbles pass through the jet nozzle 45, the mixing section 80, and the jet guide 46, and are jetted from the jet port 47 into the water tank 27. The water 71 in the bath 27 passes through the return pipe 53, the suction pipe 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, the minute cross-section flow path 79 formed by the valve element 57 and the valve seat 55 is switched to the large cross-section flow path 78, the flow of water changes, and the first collision wall 56 simply flows.
It becomes the side of the road.

Further, 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 controller is programmed in advance so as to move to the next bubble ejection state after stopping each operating state.

The above embodiment has the following effects. 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, since the valve element 57 is opened and closed by the spring 60 and the diaphragm 59 with respect to the valve seat 55, 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.

[0023]

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, it is possible to generate a large amount of fine bubbles by providing two collision walls on the downstream side of the minute cross section flow channel and colliding the pressure-reduced water against them.
Together, we provide a bubble generation nozzle that does not cause dust clogging.
It is possible.

Further, according to the second invention, by arranging the disk-shaped second collision wall concentrically with the valve body, it is possible to efficiently generate fine bubbles with a simple structure.

Furthermore, in the third aspect of the present invention, the diameter of the second collision wall is made larger than that of the valve body so that water collision is likely to occur and the generation of fine bubbles can be increased at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of a bubble generating nozzle device in a normal bubble generating state according to an 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 seat, a valve body, and a protrusion of the device.

FIG. 7 is a block diagram of a conventional bubble generator system.

FIG. 8 is a sectional view of a fine bubble generating nozzle device of the same device.

FIG. 9 is a sectional view of a normal bubble generating nozzle device of the same device.

[Explanation of symbols]

55 seat 56 First collision wall 57 Disc 62 Second collision wall 65 Protrusion 79 Micro-section flow path

─────────────────────────────────────────────────── ─── 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 Matsushita Electric Industrial Co., Ltd. (56) References JP-A-5-38354 (JP, A) JP-A-2-26658 (JP, A) JP-A-62-295662 (JP, A) JP-A-5-123371 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61H 23/00 A61H 33/00-33/02 A47K 3/00

Claims (3)

(57) [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 seat of the valve seat facing the valve seat. A valve element provided on the downstream side, the valve element and the valve
A micro sectional flow path formed only when the seat is closed;
First collision wall against which water ejected from a minute cross section collides
And a second collision wall that is located downstream of the first collision wall and that collides again with the water that has collided with the first collision wall. 2. The bubble generating nozzle device according to claim 1, wherein the shape of the second collision wall is disk-shaped, and the second collision wall and the valve body are concentrically positioned. 3. The bubble generating nozzle device according to claim 1, wherein the diameter of the second collision wall is larger than the diameter of the valve body.