JP3141514B2 - 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 FIGS.
As shown in FIG. 8, a pump unit 4 having a pump 3 for circulating hot water 2 in a bathtub 1 and an inhaler 7 for hot water 2 in the bathtub 1 connected to a suction-side pipe 5 of the pump 3 And a nozzle unit 11 having a low-pressure jet nozzle 9 and a high-pressure jet nozzle 10 branched and connected to the discharge-side conduit 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 of the high-pressure jet nozzle 10 shown in FIG. A relief valve 14 composed of a valve body 12 and a spring 13 for urging the valve body 12 is provided. When the inside of the discharge-side pipe line 7 reaches a predetermined pressure, the relief valve 14 opens to generate fine bubbles. A jet was coming. The low-pressure jet nozzle 9 is used to generate a jet foam jet.
As shown in FIG. 7, the flow path 15 of the hot water 2 and the flow path 1
5 has an air inflow passage 16 provided on the outer periphery thereof, and the hot water 2 having passed through the flow passage 15 is supplied from the narrow passage 17 to the wide chamber 18.
Will be introduced. 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 conduit 7, so that the valve element 12 and the high-pressure jet nozzle The gap between the inside of the pipe and the spring 1
There was a problem that garbage accumulated in No.3. Further, there is a problem that a gap between the inside of the discharge-side pipe 7 and the valve element 12 is not kept constant due to the flow of water flowing inside the discharge-side pipe 7, and stable generation of fine bubbles does not occur.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a bubble generating nozzle device which has an opening / closing means so that dust does not accumulate therein and which stabilizes the performance of generating fine bubbles. .

Another object of the present invention is to provide a bubble generating nozzle device for generating a large amount of fine bubbles.

[0006]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a valve seat provided at a portion through which water flows, a valve element provided opposite to the valve seat, and a valve element. Opening and closing means,
It is composed of a flow path for generating fine air bubbles between the valve seat and the valve element when the valve element and the valve seat are in contact with each other, and an impacted body against which water jetted from the flow path collides. .

According to the present invention, in order to achieve the second object, the object to be impacted is formed of a wall surface having a certain distance from the outer peripheral surface of the valve element and perpendicular to the flow path.

[0008]

According to the present invention, with the above-described structure, water obtained by pressurizing and dissolving the air that has passed through the discharge pipe is passed through a flow path formed when the valve body and the valve seat come into contact with each other, thereby dissolving the air under pressure. When water is rapidly reduced in pressure, fine bubbles are generated. However, in this state, most of the water obtained by pressurizing and dissolving the air is in a state of air supersaturation. When the supersaturated water collides vigorously with the collision object, the amount of fine bubbles generated further increases due to the decompression effect of the collision.

Further, when the valve body is opened with respect to the valve seat by the opening / closing means, dust or the like adhering to the vicinity of a flow path formed when the valve body and the valve seat come into contact with each other is downstream by water flowing through the discharge pipe. Shed to the side.

In the present invention, water in an air supersaturated state is caused to collide perpendicularly with a wall having a certain distance, and the energy of the water is maximally used to generate a large amount of fine bubbles.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 21 denotes a circulation pump, and a discharge side 22 and a suction side 23 of the circulation pump 21 are ejectors 24.
Are connected to each other through a branch circuit 25. A main discharge circuit 27 and a sub-discharge circuit 28 are piped from the discharge side 22 to the water tank 26, and an electromagnetic valve 29 and a heat exchanger 30 are provided in the middle of the main discharge line 27. An air bubble generation nozzle 31 is provided upstream of the main discharge line 27 and the sub discharge line 28. The bubble generating nozzle 31 includes a main body case 32, a main discharge line 33, a sub discharge line 34, a junction 35 where the main discharge line 33 and the sub discharge line 34 merge, an opening 36 and an air chamber 37. Air line 38 having a valve body 39 and valve seat 4
0 and a groove 41 having a constant cross-sectional area provided in the valve body 40
And a pressure reducing means 43 composed of a collision wall 42 provided so as to be perpendicular to the groove 41, an ejection nozzle 44 provided on the downstream side of the junction 35, and provided on the downstream side of the ejection nozzle 44. A mixing section 45, a jetting direction variable nozzle 46 provided downstream of the mixing section 45, a nozzle case 47 and a nozzle cover 48 for holding the jetting direction variable nozzle 46, and a diaphragm 49 provided inside the main body case 32; A diaphragm holder 51 and a diaphragm holder 5 for fixing a spring 50 for abutting the valve seat 40 and the valve body 39.
Switching means 5 comprising a valve shaft 52 connecting the valve body 1 to the valve body 39
3. The air pipe 39 is connected to the air pipe 5.
4. The solenoid valve 55 is connected.

On the other hand, a three-way valve 57 is connected between the suction side 23 of the circulation pump 21, the branch circuit 25 and the return line 56. From the three-way valve 57 to the negative pressure portion 58 of the ejector 24
Is connected to a suction circuit 59. Further suction circuit 5
9 is provided with a solenoid valve 60. The negative pressure portion 58 of the ejector 24 is connected to an electromagnetic valve 62 through an air suction pipe 61.
Is connected. 63 is a controller, 64
Switches the type of bubble and turns on / off the bubble ejection
Or a switch for switching the type of bubble. Reference numeral 65 denotes water in the water tank 26, and reference numerals 66 and 67 denote arrows indicating the flow of water when normal bubbles or fine bubbles are generated, respectively. 6
Reference numerals 8 and 69 denote arrows indicating the flow of air when normal bubbles or fine bubbles are generated, respectively. 70 is a normal bubble having a bubble diameter of about 2 to 5 mm, and 71 is a fine bubble having a bubble diameter of about 10 to 20 μm.

In this embodiment, the cross-sectional flow path of the pressure reducing means 43 forms a large cross-sectional flow path 72 when the valve seat 40 and the valve body 39 are open, and the valve seat 40 and the valve body 39 are in contact with each other. At the time, a micro-section flow path 73 is formed.

Next, the operation of the above configuration will be described. First, the operation at the time of ejecting the fine bubbles will be described with reference to FIG. 2. When the "fine" button of the switch 64 is pressed in a state where all the bubbles are not operated, the solenoid valve 60 of the suction circuit 59 is opened by the controller 63 and the main discharge pipe is opened. The electromagnetic valve 29 of the passage 27 is closed, the electromagnetic valve 62 is opened / closed for a set time, and the three-way valve 57 is switched to the discharge side of the suction circuit 56 to operate the circulation pump 21. When the circulation pump 21 is operated, the water 65 discharged from the circulation pump 21 flows to the sub-discharge circuit 28 and also to the branch circuit 25. At this time, the ejector 24 functions and the water 65 in the water tank 26 is supplied to the suction circuit 59. From the negative pressure portion 58 of the ejector 24. When the water 65 in the water tank 26 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. Because bubble jet nozzle 3
The valve body 39, which is the decompression means 43 inside 1, is in contact with the valve seat 40, and the water 65 flows through the minute flow path cross section 73 of the groove 41 provided in the valve body 39. Here, since the flow of the water 65 is sharply reduced, the circulation pump 21 is operating in a substantially shutoff operation state. Therefore, 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. When the solenoid valve 62 is operated in such an operating state, air is generated in the air suction pipe 61.
And is sucked into the negative pressure portion 58 of the ejector 24.
The sucked air enters the circulation pump 21 from the suction side 22 via the ejector 24 and the branch circuit 25, and the sub-discharge circuit 2
8, the air is sent from the sub-discharge pipeline 34 to the bubble jet nozzle 31. At this time, in the sub-discharge circuit 28 and the sub-discharge conduit 34, the air sucked due to the high pressure is in a state of being dissolved under pressure in the water 65. The water 65 in which the air is dissolved is ejected from the minute flow path cross section 73 formed when the valve body 39 of the decompression means 42 of the bubble ejection nozzle 31 and the valve seat 40 come into contact with each other. The jetted water 65 collides with the collision wall 42 as soon as the pressure is reduced. The water 65 colliding with the collision wall 42 is rapidly decompressed, so that the dissolved air becomes fine bubbles 71 and the confluence 35
Flows to Further, the fine bubbles 71 are ejected into the water tank 26 through the ejection nozzle 44, the mixing section 45, and the ejection direction variable nozzle 46. The water in the bathtub 26 is supplied to the inlet 74 and the return line 5.
6. Return to the circulation pump 21 via the electromagnetic valve 60, the suction circuit 59, the ejector 24, the branch circuit 25, and the three-way valve 57.

When the switch 62 is turned off, the controller 61 operates to close the solenoid valve 60 and stop the circulation pump 21. Next, the suction circuit 59 side of the three-way valve 57 and the electromagnetic valve 60 are closed, and the electromagnetic valve 29 is opened.

Next, the operation at the time of jetting a bubble having a bubble diameter of 2 to 5 mm will be described with reference to FIG. 1. In a state where all the bubbles are not operating and the circulating pump 21 is filled with water 65, the switch 64 is turned on. Press the "Large" button and the controller 6
3, the circulation pump 21 is operated, and at the same time, the solenoid valve 55 is opened. When the circulation pump 21 is operated, the water 65 discharged from the circulation pump 21 flows through the main discharge circuit 27, passes through the main discharge line 33 and the junction 35, is jetted from the jet nozzle 44, and flows into the mixing unit 45. At this time, a pressure difference is generated between the inside of the mixing section 45 and the opening section 36, and while passing through the solenoid valve 55 and the air pipe 54, the air passing through the air chamber 37 having the air pipe line 38 flows from the opening section 36 to the mixing section 45. The water flows in, is mixed with the water 65 jetted from the jet nozzle 44, and is jetted into the water tank 26 from the jet direction variable nozzle 46.

At this time, when water 65 flows through the main discharge line 33 and the return line 56, the pressure in the junction 38 increases, and the pressure in the return line 56 decreases. When the pressure difference between the junction 38 and the return line 56 becomes equal to or greater than a certain value, the diaphragm 49 is pushed up to compress and contract the spring 50, and the valve shaft 52 and the valve body 39 connected to the diaphragm 49 are raised. The seat 40 and the valve body 39 are opened. When the valve seat 40 and the valve body 39 are opened, a large-section flow path 72 is formed, and the main discharge pipe 2
The water 65 having passed through 7 flows through the large-section flow path 72. For this reason, the dust accumulated in the minute flow path cross section 73 formed when the valve body 39 and the valve seat 40 come into contact with each other is flowed and discharged into the bathtub 26 through the ejection nozzle 44.

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.

According to the above embodiment, the following effects can be obtained. By switching the flow path of the three-way valve 57 and opening and closing the solenoid valve 29 and the solenoid valve 60, the normal bubble 70 is automatically generated,
It is possible to switch to the fine bubbles 71. In addition, valve seat 4
Since the valve body 39 is opened and closed by the spring 50 and the diaphragm 49 with respect to 0, the cost can be reduced. Further, a diaphragm 49 is provided between the mixing chamber 35 and the return line 56.
This prevents water leakage in the piping even if the diaphragm is damaged. Further, since the small cross-section flow path 73 is automatically switched to the large cross-section flow path 72 when jet bubbles are generated, dust clogging 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.

[0020]

As is apparent from the above description, according to the bubble generating nozzle device of the present invention, when the gas that has passed through the sub-discharge pipe and dissolved by pressure is brought into contact with the valve body and the valve seat. It is possible to generate fine bubbles by passing through the cross section of the minute flow channel to be formed and rapidly reducing the pressure of the water in which the gas is dissolved under pressure. Further, a large amount of fine bubbles can be generated stably by colliding the depressurized water that has passed through the micro-section flow path with the collision target.

On the other hand, when a predetermined amount or more of water flows through the main discharge pipe, the valve seat and the valve element are opened by the flow path switching means.
Further, water also flows from the sub-discharge pipe, and dust adhering to the cross section of the minute flow path can be caused to flow downstream, so that clogging of dust can be eliminated.

Further, the amount of fine bubbles generated can be increased with a simple structure by using the collision object as a wall surface.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of the nozzle when the apparatus is in a state where fine bubbles are generated.

FIG. 3 is a system circuit diagram when the apparatus is in a normal bubble generation state.

FIG. 4 is a system circuit diagram when the device is in a state of generating fine bubbles.

FIG. 5 is an enlarged sectional view of a decompression means of the apparatus.

FIG. 6 is a system configuration diagram of a conventional bubble generator.

FIG. 7 is an enlarged sectional view of a fine bubble generation nozzle of the apparatus.

FIG. 8 is an enlarged sectional view of a normal bubble generating nozzle of the apparatus.

[Explanation of symbols]

 31 Bubble ejection nozzle 33 Main discharge pipeline 34 Sub-discharge pipeline 35 Merging section 39 Valve element 40 Valve seat 41 Groove (73 micro cross section flow path) 42 Collision wall 56 Return pipe 72 Large cross section flow path

──────────────────────────────────────────────────の Continued on the front page (72) Kunio Nakamura, Inventor 1006, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Tsunehiro Yoshida 1006, Kadoma, Kazuma, Kadoma, Osaka Pref. (72) Inventor Yuichi Emura 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Kazuo Kubo 1006 Oji Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field (Int.Cl. ⁷ , DB name) A61H 23/00

Claims (2)

(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 in a portion through which the water passes, and a valve seat provided opposite to the valve seat. A valve element, an opening / closing means for opening and closing the valve element, a flow path for generating fine bubbles between the valve seat and the valve element when the valve element contacts the valve seat, A bubble generating nozzle device provided with a decompression means including an object to be hit by the water jetted from a road. 2. The bubble generating nozzle device according to claim 1, wherein the object to be impacted has a fixed distance from the outer peripheral surface of the valve body and a wall surface perpendicular to the flow path.