JP3360340B2 - Bubble generation nozzle device - 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. 13, a pump unit 4 having a pump 3 for circulating hot water 2 in a bathtub 1 and a pump 3
Nozzle provided with a low-pressure jet nozzle 9 and a high-pressure jet nozzle 10 branched and connected via a three-way valve 8 to an inhaler 6 for hot water 2 in the bathtub 1 and a discharge pipe 7 connected to the suction side pipe 5 of FIG. It consisted of unit 11. The high-pressure jet nozzle 10 is opened and closed by the pressure inside the discharge-side pipe 7 of the high-pressure jet nozzle 10 shown in FIG. Valve body 12 and spring 13 for urging valve body 12
And a relief valve 14 composed of
When the pressure in the discharge-side pipe line 7 reaches a predetermined pressure, the relief valve 14 is opened to generate a fine bubble jet. As shown in FIG. 13, the low-pressure jet nozzle 9 includes a flow path 15 for the hot water 2 and an air inflow path 16 provided on the outer periphery of the flow path 15 to generate a jet bubble jet. The hot water 2 is introduced from a narrow passage 17 into a wide chamber 18. Further, the air passing through the air inflow passage 16 was sent from the narrow flow path 19 to the chamber 18, mixed in the chamber 18, and discharged from the nozzle 20 as a jet foam jet (Japanese Patent Publication No. 3-14464).

[0003]

However, in the above-described structure, fine bubbles are generated in the gap between the valve element 12 and the inside of the discharge-side pipe 7.
The gap between the inside of the discharge side pipeline 7 and the valve body 12 is not kept constant due to the flow of water flowing inside, and there is a problem that the fine bubbles are not stably generated.

Further, it is difficult to determine the setting conditions of the spring and the shapes of the valve body and the valve seat so that the valve body 12 is brought into contact with the spring 13 and the pressure in the high-pressure jet nozzle is kept constant by the relief valve 14. .

[0005] When the discharge flow rate further decreases, the valve element 12 comes into contact with the discharge pipe 7, and the gap between the valve element 12 and the discharge pipe 7 becomes small, so that even fine dust is easily clogged.

[0006] The present invention is the above configuration, the valve seat and the valve body is generating stable microbubbles by keeping a certain distance, a fine fine bubbles to the valve seat and the valve body is kept a certain distance It is a first object of the present invention to provide a nozzle device for generating fine bubbles. Further, a second object is to make it difficult for clogging of dust. It is a third object of the present invention to generate low-cost and stable microbubbles by configuring the valve seat and the valve body with simple shapes.

[0007]

SUMMARY OF THE INVENTION The present invention is order to achieve the above Symbol purpose, a valve seat in which the water is provided in a portion that passes through, a valve body provided opposite to said valve seat, said It comprises a valve shaft connected to a valve body and a bearing for supporting the valve shaft.

[0008]

According to the present invention, a minute flow path is ensured by the above-mentioned structure without any convex portions on the valve body and the valve seat. For this reason, when water flows through the microchannel and when the valve body is opened, dust is dullly flushed to the downstream side when the valve body is opened.

[0009]

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 to each other 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. A main discharge pipe line 29 is provided from the discharge side 22 to the bubble generation nozzle device 28 via a solenoid valve 30 and a heat exchanger 31, and a branch circuit 26 between the solenoid valve 24 and the ejector 25 is connected to the bubble generation nozzle device. A sub-discharge pipe line 32 is connected to the pipe 28 via a check valve 33 and a tank 34. A check valve 35 is provided between the main discharge pipe 29 downstream of the heat exchanger 31 and the sub discharge pipe 32 downstream of the tank 34. A return line 36 is connected to the bubble generating nozzle device 28.

A three-way valve 24 is connected between the suction side 23 of the pump 21, the branch circuit 26 and the return line 36. A suction line 38 is connected from the three-way valve 24 to the negative pressure portion 37 of the ejector 25. Further ejector 25
The negative pressure section 37 is connected to a solenoid valve 41 via a sub air suction pipe 39 and a constant air suction governor 40. Solenoid valve 4
An air filter 42 is connected to 1.

On the other hand, the bubble generating nozzle device 28 includes a nozzle body 43, fine bubble generating means 44 provided inside the nozzle body 43, a jet nozzle 45 provided downstream of the fine bubble generating means 44, A jet guide 46 provided downstream of the nozzle 45, a jet port 47 capable of changing the jet direction, and a nozzle cap 48 are provided. 49
Denotes a nozzle adapter bathtub fixing flange to which a jet guide 46 can be attached. 50, 5
1, 52 and 53 are a main discharge line connection port, a sub discharge line connection port, a main air suction line connection port, and a return line connection port, respectively.

Further, the fine bubble generating means 44 includes a pressure reducing valve casing 54, a valve seat 55 provided in the pressure reducing valve casing, a collision wall 56 provided in the valve seat 55, and an upstream side facing the valve seat. , A valve shaft 58 connected to the valve 57, and a diaphragm 59 connected to the valve shaft
, A spring 60 provided to open the valve seat 55 and the valve body 57, and a valve shaft guide 61 for suppressing the deflection of the valve shaft 58. Further, the valve shaft 58 and the valve body 57 are provided with a pressure introducing pipe 64 that communicates the buffer chamber 62 with an enlarged chamber 63 provided upstream of the jet nozzle 45. Further, the valve body 57 is provided with a protruding body 65 as a constant distance maintaining means, facing the valve seat 55.

A main air suction pipe 66 and a solenoid valve 67 are connected to the main air suction pipe connection port 52.

Reference numeral 68 denotes a controller, and reference numeral 69 denotes a switch for turning on / off the ejection of bubbles or switching the type of bubbles. Reference numeral 70 denotes water in the water tank 27;
Are arrows indicating the flow of water when normal bubbles or fine bubbles are generated, respectively. Reference numerals 73 and 74 denote arrows indicating the flow of air when normal bubbles or fine bubbles are generated, respectively. 75 is a normal bubble having a bubble diameter of about 2 to 5 mm, and 76 is a fine bubble having a bubble diameter of about 10 to 20 μm. In this embodiment, the fine bubble generating means 44 includes a valve seat 55 and a valve body 57.
Is open, a large-section flow path 77 is formed, and the valve seat 5
When the valve body 5 and the valve body 57 are closed via the protruding body 65, a micro-section flow path 78 is formed. 79 is a mixing chamber provided downstream of the jet nozzle 45 and the main air suction pipe 52.

The operation of the above configuration will be described. First, the operation at the time of jetting a bubble having a bubble diameter of 2 to 5 mm will be described with reference to FIGS. 1 and 3. In the state where all of the bubbles are not operating and the water 70 is filled in the circulating pump 21, the switch 69 Is pressed by the controller 68, the circulation pump 21 is operated. When the circulation pump 21 is operated, the water 70 discharged from the circulation pump 21 is supplied to the electromagnetic two-way valve 3.
0, flows through the heat exchanger 31, the main discharge pipe 29, passes through the main discharge pipe connection port 50, the expansion chamber 63, and is jetted from the jet nozzle 45. On the other hand, the check valve 35, the auxiliary discharge line 32,
After passing through the sub-discharge pipe connection port 51, it passes through the expansion chamber 63 and is jetted from the jet nozzle 45 into the mixing chamber 79. At the same time, when the solenoid valve 67 is opened, the air that has passed through the main air suction pipe 66 and the main air suction pipe connection port 52 is discharged by the jet nozzle 4.
The water 70 is sucked into the negative pressure portion formed by the water 70 spouted from the water 5 and mixed with the water 70 in the mixing chamber 79. Mixed water 70
Is passed through the jet guide 46, and from the jet port 47 to the water tank 27.
Squirted into. At this time, the valve body 57 is opened with the valve seat 55 by the spring 60.

Further, when the switch 69 is turned off, the controller 68 operates, the solenoid valve 67 is closed, and the circulation pump 21 is stopped.

Next, the operation at the time of ejection of the fine bubbles will be described with reference to FIGS. The valve 30 is closed and the solenoid valve 4
1 is opened and closed according to the set time and switched to the suction side of the suction circuit 38 of the three-way valve 24, and the circulation pump 21 is operated. When the circulation pump 21 is operated, the circulation pump 2
The water 70 discharged from the nozzle 1 flows to the sub-discharge circuit 32 and also to the branch circuit 26. At this time, the ejector 2
5 functions, and the water 70 in the water tank 27 is sucked from the suction circuit 38 into the negative pressure section 37 of the ejector 25. Water 7 in aquarium 27
When 0 is sucked into the suction side 23 of the circulation pump 21, the pressure on the suction side 23 of the circulation pump 21 increases. When the circulation pump 21 is operated in this state, the pressure on the discharge side 22 is increased. The reason is that when water 70 flows into the pressurizing chamber 80 inside the depressurizing means 44 inside the bubble generating nozzle device 28 and reaches a certain pressure or more, the diaphragm 59 compresses the spring 60 and the pressure in the buffer chamber 62 rises. I do. However, the pressure in the buffer chamber 62 is increased via the pressure introducing pipe 64 to the pressurizing chamber 80.
Is transmitted to As a result, the pressure in the buffer chamber 62 decreases, and the valve body 57 is closed by the valve seat 55. At this time, the valve body 57 and the valve seat 55 are in contact with each other via the protruding portion 65, so that the minute cross section flow path 78 is formed. That is, the water 70 flows through the micro-section flow path 78 formed by the valve body 57, the valve seat 55, and the protrusion 56. Here, since the flow of the water 70 is sharply reduced, the circulation pump 21 is operating in a substantially shutoff operation state. Accordingly, the pressure on the suction side 23 increases, and the shutoff pressure of the circulation pump 21 is added, so that a pressure increase is obtained. In such an operating state, the solenoid valve 4
1 is opened, air flows through the filter 42 and the solenoid valve 4
1. The air is sucked into the negative pressure section 37 of the ejector 25 through the auxiliary air suction pipe 39 via the constant air suction governor 40. The sucked air enters the circulation pump 21 from the suction side 23 via the ejector 25 and the branch circuit 26, and is sent from the auxiliary discharge pipe 32 to the bubble generation nozzle device 28. At this time, the air sucked due to the high pressure in the sub-discharge pipe line 32 is in a state of being dissolved under pressure in the water 70. The water 70 in which the air is dissolved is jetted from the minute cross-section channel 78 formed when the valve body 57 of the decompression means 44 of the bubble generation nozzle device 28 and the valve seat 55 come into contact with each other. The jetted water 70 collides with the collision wall 56 as soon as the pressure is reduced. The water 70 that has collided with the collision wall 56 is rapidly decompressed, so that the dissolved air becomes fine bubbles 76 and flows to the junction 63. Further fine bubbles 7
6 passes through the jet nozzle 45, the mixing section 79, and the jet guide 46, and is jetted from the jet port 47 into the water tank 27. The water 70 in the bathtub 27 returns to the circulation pump 21 via the return line 53, the suction circuit 38, the ejector 25, the branch circuit 26, and the three-way valve 24.

Further, when "OFF" of the switch 69 is pressed, the controller 68 operates to stop the circulation pump 21.
Next, the branch circuit 26 side of the three-way valve 24 and the solenoid valve 41 are closed, and the solenoid valve 30 is opened. At this time, the pressure in the pressurizing chamber 80 decreases, and the micro-section flow path 78 is switched to the large-section flow path 77.

When switching from the state of ejecting fine bubbles to the state of ejecting bubbles of 2 to 5 mm, and 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 state moves to the next bubble ejection state.

The first embodiment has the following effects. By switching the flow path of the three-way valve 24 and opening and closing the solenoid valve 30, the normal bubble 75 and the fine bubble 76 can be automatically switched. Further, since the valve body 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, by integrating the jet nozzle 45 with the pressure reducing valve casing 54, the jet guide 45 can be removed together with the jet guide 45 when it is detached from the nozzle body 43 from the bathtub side. Also,
The pressure reducing means having the diaphragm 59 is connected to the pressure reducing valve casing 5.
4 prevents water leakage in the piping even if the diaphragm is damaged. Further, since the large flow path is automatically switched to the fine cross-section flow path 78 when generating fine bubbles, dust can be automatically eliminated, and it is not necessary to provide a dedicated cleaning mechanism. In addition, even if the user does not perform the cleaning, the cleaning can be automatically performed by using the jet bubbles, so that the user does not need to perform any troublesome operation.

Next, a second embodiment will be described with reference to FIGS. 1, 2, 3, 4, and 7. FIG. Fine bubble generating means 4
Reference numeral 4 denotes a pressure reducing valve casing 54, a valve seat 55 'provided in the pressure reducing valve casing, a collision wall 56 provided in the valve seat 55', and an upstream side opposed to the valve seat 55 '. A valve body 57 ', a valve shaft 58 connected to the valve body 57', a diaphragm 59 connected to the valve shaft, a valve seat 55 'and the valve body 5
And a spring 60 provided for opening the opening 7 '.
And a valve shaft guide 61 for suppressing runout of the valve shaft 58. The valve shaft 58 and the valve body 57 ′ are provided with a pressure introducing pipe 64 that communicates between the buffer chamber 62 and an expansion chamber 63 provided upstream of the jet nozzle 45. Further, a protruding body 6 serving as a constant distance maintaining means is provided on the valve seat 55 '.
5 'is provided facing the valve body 57'. Matters other than those described above are the same as in the first embodiment and will not be described.

Next, a third embodiment will be described with reference to FIGS. 1, 2, 3, 4, 8, 9, and 10. FIG. The microbubble generating means 44 is provided on the upstream side facing the pressure reducing valve casing 54, the valve seat 55 provided in the pressure reducing valve casing, the collision wall 56 provided on the valve seat 55, and the valve seat. A valve body 81, a valve shaft 58 connected to the valve body 57, a diaphragm 59 connected to the valve shaft 82, and a spring 60 provided to open the valve seat 55 and the valve body 81.
And a valve shaft guide 61 for suppressing the runout of the valve shaft 82. Further, the valve shaft 82 and the valve body 81 are provided with a pressure introducing pipe 64 that communicates the buffer chamber 62 with a pressurizing chamber 80 provided downstream of the valve seat 55. In addition, the valve shaft 8
The second valve shaft guide 61 and the valve shaft guide 61 are means for maintaining a constant distance.
To form Matters other than those described above are the same as in the first embodiment and will not be described.

[0023]

As is apparent from the above description, according to the bubble generation nozzle device of the present invention, the distance between the valve body and the valve seat is regulated by the movement distance by the valve shaft and the valve shaft guide. The valve can be formed at low cost because the minute flow path is formed without the projection. At the same time, dust is less likely to be clogged even when fine bubbles are generated. In addition, the valve seat and the valve body can be formed in a simple shape, and if the valve body and the valve seat are opened, no dust is clogged at all.

[Brief description of the 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 nozzle of the same device in a state where fine bubbles are generated.

FIG. 3 is a system circuit diagram showing an operation state of the apparatus when normal air bubbles are generated.

FIG. 4 is a system circuit diagram showing an operation state of the apparatus for generating fine bubbles.

FIG. 5 is an exploded perspective view of a pressure reducing means of the apparatus.

FIG. 6 is an enlarged perspective view of a constant distance maintaining means of the pressure reducing means of the apparatus.

FIG. 7 is an enlarged perspective view showing a constant distance maintaining means of the pressure reducing means of the bubble generating nozzle device according to the second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a pressure reducing means of the apparatus.

FIG. 9 is an enlarged perspective view of a constant distance maintaining means of the pressure reducing means of the apparatus.

FIG. 10 is an enlarged sectional view of a constant distance maintaining means of the pressure reducing means of the apparatus.

FIG. 11 is a system configuration diagram of a conventional bubble generator.

FIG. 12 is an enlarged cross-sectional view of the fine bubble generating nozzle device of the device.

FIG. 13 is an enlarged sectional view of a normal bubble generating nozzle device of the device.

[Explanation of symbols]

 28 Bubble generating nozzle device 29 Main discharge line 32 Sub discharge line 36 Return line 55 Valve seat 57 Valve seat 65 Projection

──────────────────────────────────────────────────の Continued on the front page (72) Kunio Nakamura, Inventor 1006, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor, Tsunehiro Yoshida 1006, Kadoma, Kazuma, Kadoma, Osaka Pref. (72) Inventor Yuichi Emura 1006 Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuo Kubo 1006 Odakadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (56) JP-A-5-38353 (JP, A) JP-A-5-123371 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61H 23/00 A47K 3/00

Claims (1)

(57) [Claims] An air bubble generating device for generating air bubbles by depressurizing water in which air is dissolved under pressure is provided with a valve seat provided at a portion through which the water passes, and a valve seat provided opposite to the valve seat. A valve body, a valve shaft connected to the valve body, and a bearing for supporting the valve shaft, wherein the valve seat and the valve body are closed when the valve shaft and the bearing come into contact with each other. An air bubble generating nozzle device in which a valve body and the valve seat are closed while maintaining a certain distance.