JP3092309B2 - 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 Conventionally, as shown in FIGS. 3 to 5, this type of bubble generating apparatus has a pump unit 5 having a pump 3 for circulating hot water 2 in a bathtub 1 and an air suction means 4.
And a low-pressure jet nozzle 10 and a high-pressure jet nozzle 11 branched and connected via a three-way valve 9 to an inhaler 7 and a discharge line 8 of the hot water 2 in the bathtub 1 connected to the suction-side pipe 6 of the pump 3. The nozzle unit 12 was provided with
The high-pressure jet nozzle 12 is provided with a valve body 13 that opens and closes by the pressure inside the discharge-side pipe 8 of the high-pressure jet nozzle 11 in order to generate a fine bubble jet by decompressing a liquid obtained by pressurizing and dissolving air in the hot water 2. , Spring 14 for urging valve body 13
And a relief valve 15 composed of
When the inside of the discharge side pipe line 8 reaches a predetermined pressure, the relief valve 15 is opened to generate a fine bubble jet. At this time, the relief valve 16 was opened by the discharge pressure of the pump 3 to suck in the air. The low-pressure jet nozzle 10 includes a flow path 17 for the hot water 2 and an air inflow path 18 provided on the outer periphery of the flow path 17 to generate a jet foam jet. It is introduced from the passage 19 into a large chamber 20. The air that has passed through the air inflow passage 18 was sent from the narrow flow path 21 to the chamber 20, and was discharged from the mixing nozzle 22 as a jet bubble jet in the chamber 20 (Japanese Patent Publication No. 3-14464).

[0003]

However, in the above configuration, fine bubbles are generated in the gap between the relief valve and the inside of the discharge pipe. However, the discharge pipe is caused by the flow of water flowing in the discharge pipe. There has been a problem that the gap with the inside of the road is not kept constant and fine bubbles are not generated stably. In addition, there is a problem that dust is clogged in a gap between the valve seat and the valve element and a spring (Japanese Patent Publication No. 3-7474).

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and a bubble generating nozzle capable of stably generating a large amount of fine bubbles without causing accumulation of dust by forcibly self-cleaning a portion where dust is likely to be clogged. It is intended to provide a device.

[0005]

In order to achieve the above object, a bubble generating nozzle device according to the present invention comprises: a main discharge pipe for passing water; and a sub-discharge pipe for passing a liquid in which air is dissolved under pressure. A decompression means comprising a valve body provided with a slit and a valve seat, connected to the downstream side of the sub-discharge pipe line, and controlling the liquid pressurized and dissolved by switching between a large-section flow path and a fine-section flow path; A merging section provided on the downstream side of the main discharge pipe and the pressure reducing means, a flow path switching means for switching a cross-sectional flow path of the pressure reducing means, and a jet nozzle provided on the downstream side of the merging section. The pressure reducing means forms a micro-section flow path when the valve body and the valve seat are in contact with each other, and forms the large-section flow path when the valve body and the valve seat are opened. The slit provided in the body is used for water passing through the main discharge line. It is obtained so as to move to the position where the band.

[0006]

According to the present invention, a liquid pressurized gas passing through the sub-discharge pipe passes through a flow path (micro-section flow path) formed by abutting the valve body and the valve seat and generating bubbles. When
The pressure-dissolved liquid of the gas is rapidly decompressed to generate fine bubbles.

[0007] Dust easily adheres to the micro-section flow path formed when the valve body and the valve seat are closed when micro bubbles are generated. When dust adheres to the micro-section flow path, when water flows from the main discharge line to the junction, the valve element and the valve seat are opened to form a large-section flow path and the valve element is provided. The slit moves to a position in the junction where the slit is a water basin passing through the main discharge conduit. Water vigorously hits the slit of the valve body that has moved to the basin, and dust adhering near the slit of the valve body flows out from the ejection nozzle to the downstream side.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 3, 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 25 via an ejector 24. 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 pipe. An air bubble generation nozzle 31 is provided upstream of the main discharge circuit 27 and the sub discharge circuit 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 suction means 38 having a valve body 39 and a valve seat 4
0, a slit 4 having a constant cross-sectional area provided in the valve body 39
1; a jetting nozzle 43 provided downstream of the merging section 35; a mixing section 44 provided downstream of the jetting nozzle 43; and a mixing section 44 provided downstream of the mixing section 44. Ejection direction variable nozzle 45, nozzle case 46 for holding ejection direction variable nozzle 45 and nozzle cover 4
7 and a diaphragm 4 provided inside the main body case 32.
8, a diaphragm holder 50 for fixing a spring 49 for abutting the valve seat 40 and the valve body 39, and a switching means 52 including a valve shaft 51 for connecting the diaphragm holder 50 and the valve body 39. An electromagnetic valve 55 is connected to the air suction means 38 via an air circuit 53 and a check valve 54.

On the other hand, a three-way valve 57 is provided between the suction side 23 of the circulation pump 21, the branch circuit 25 and the return circuit 56. From the three-way valve 57 to the negative pressure portion 58 of the ejector 24
A suction circuit 59 is provided at the bottom. Further suction circuit 5
9 is provided with a solenoid valve 60. The negative pressure portion 58 of the ejector 24 is connected to the solenoid valve 55 through the air suction pipe 61.
It is connected to the. 61 is a controller, 62
Is a switch for switching the type of bubble and for turning on and off the bubble ejection. 63 is water in the water tank 26, 6
Reference numerals 4 and 65 denote arrows indicating the flow of water when fine bubbles or normal bubbles are generated, respectively. Reference numerals 66 and 67 denote arrows indicating the flow of air when a fine bubble or a normal bubble is generated, respectively. 68 is a fine bubble having a bubble diameter of about 10 to 20 microns, and 69 is a normal bubble having a bubble diameter of about 2 to 5 mm. In this embodiment, the cross section flow path of the pressure reducing means 42 forms a minute cross section flow path 70 when the valve seat 40 and the valve body 39 are in contact with each other, and becomes large when the valve seat 40 and the valve body 39 are open. A cross-sectional channel 71 is formed.

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 FIGS. 2 and 5. When the (fine) button of the switch 62 is pressed in a state where all of the bubbles are not operating, the controller 61 causes the suction circuit 59 to operate.
The solenoid valve 60 of the main discharge pipe 27 is opened.
Is closed, the solenoid valve 55 is opened / closed for a set time, and the three-way valve 57 is switched to the discharge side of the suction circuit 56, so that the circulation pump 21 is operated. When the circulation pump 21 is operated, the water 63 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 6 in the water tank 26
3 is sucked from the suction circuit 59 to the negative pressure portion 58 of the ejector 24. When the water 63 in the water tank 26 is sucked into the suction side 23 of the circulation pump 21, the pressure on the suction side 24 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 the valve body 39 and the valve seat 4 which are the pressure reducing means 42 inside the bubble jet nozzle 31
0 abuts on the slit 4 provided in the valve body 39.
The water 63 is to flow to 1. Here, since the flow of the water 63 is rapidly 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. When the solenoid valve 55 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 circulating pump 21 from the suction side 23 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 pipeline 34, the air sucked due to the high pressure is in a state of being dissolved under pressure in the water 63. When the water 63 in which the air is dissolved is in contact with the valve body 39 of the decompression means 42 of the bubble jet nozzle 31 and the valve seat 40, the micro channel cross section 7 formed by using the slit 41.
When the air is jetted from zero into the junction 35, the pressure is rapidly reduced, and the dissolved air becomes fine bubbles 68. The fine bubbles 68 are ejected into the water tank 26 through the ejection nozzle 43, the mixing section 44, and the ejection direction variable nozzle 45. Bathtub 26
Water 63 is supplied to the suction circuit 56, the solenoid valve 60, and the suction circuit 5.
9. Return to the circulation pump 21 via 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 55 and stop the circulating 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 FIGS. 1 and 4. In the state where all the bubbles are not operating and the circulation pump 21 is filled with water 63, the switch is operated. When the (large) button 62 is pressed, the circulation pump 21 is operated by the controller 61, and at the same time, the solenoid valve 55 is opened. When the circulation pump 21 is operated, water 63 discharged from the circulation pump 21 is discharged to the main discharge circuit 2.
7, passes through the main discharge pipe 33 and the merging section 35, is jetted from the jet nozzle 43, and flows into the mixing section 44. At this time, a pressure difference occurs between the inside of the mixing section 44 and the opening 36, and the electromagnetic valve 5
5. The air that has passed through the check valve 54, the air circuit 53, and the air chamber 37 flows into the mixing section 44 from the opening 36 and is mixed with the water 63 that has been ejected from the ejection nozzle 43, and is injected from the ejection direction variable nozzle 45 into the water tank 26 It is gushing.

At this time, when water 63 flows through the main discharge pipe 33, the pressure in the junction 35 rises, and when the pressure reaches a certain level or more, the diaphragm 48 is pushed up, and when the spring 49 is compressed, the diaphragm 48 is mainly moved to the diaphragm 48. Connected valve shaft 5
1. The valve body 39 is raised, and the valve seat 40 and the valve body 39 are opened. At this time, the slit 41 provided in the valve body 39 moves to the position where the flow velocity is the earliest in the mixing section 35 of the water 63 flowing out of the main discharge pipe 33. When the valve seat 40 and the valve element 39 are opened in this manner, a large-section flow path 71 is formed, and the water 63 that has passed through the main discharge pipe 27 can flow through the large-section flow path 71. For this reason, dust accumulated in the micro-section flow path formed when the valve body 39 and the valve seat 40 are in contact with each other is flowed and discharged into the bathtub 26 through the ejection nozzle 43.

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, it is automatically switched to fine bubbles or normal bubbles. Further, since no electric parts such as a motor are provided on the nozzle, the cost can be reduced. Further, by moving the slit to the position where the flow velocity is the fastest, dust can be efficiently removed.

[0016]

As is apparent from the above description, the following effects can be obtained by the bubble generating nozzle device of the present invention.
By forcibly self-cleaning a portion where dust is likely to be clogged, dust is not accumulated, and a large amount of fine bubbles can be generated stably.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a state in which fine bubbles are generated in the apparatus.

FIG. 3 is a perspective view of a valve body as a pressure reducing means of the apparatus.

FIG. 4 is a system circuit diagram showing an operation state of the apparatus when normal bubbles are generated.

FIG. 5 is a system circuit diagram showing an operation state of the apparatus for generating fine bubbles.

FIG. 6 is a system circuit diagram of a conventional bubble generation nozzle device.

FIG. 7 is a sectional view of a fine bubble generating nozzle of the apparatus.

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

[Explanation of symbols]

 Reference Signs List 31 bubble ejection nozzle 33 main discharge pipe 34 sub-discharge pipe 35 merging section 39 valve element 40 valve seat 41 slit 42 decompression means 45 ejection nozzle 52 flow path switching means 70 micro cross section flow path 71 large cross section flow path

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-212083 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61H 23/00

Claims (1)

(57) [Claims] 1. A main discharge pipe through which water passes, a sub-discharge pipe through which a liquid in which air is pressurized and dissolved, a large cross-sectional flow path and a micro cross-sectional flow connected downstream of the sub-discharge pipe. A pressure reducing means for controlling the liquid which has been pressurized and dissolved by switching a path, a junction provided on the downstream side of the main discharge pipe line and the pressure reducing means, and a flow path for switching a sectional flow path of the pressure reducing means Switching means, and a jet nozzle provided on the downstream side of the merging section, wherein the pressure reducing means comprises a valve body provided with a slit and a valve seat provided facing the valve body, and When the valve element and the valve seat are in contact with each other, a minute cross-sectional flow path is formed, and when the valve element and the valve seat are opened, the large cross-sectional flow path is formed, and the valve element is provided on the valve element. The slit generates bubbles that move to a position that becomes a water basin that passes through the main discharge pipe Nozzle apparatus.