JP3087425B2 - 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. 5, a pump unit 4 having a pump 3 for circulating hot water 2 in the bathtub 1, an inhaler for the hot water 2 in the bathtub 1 connected to the suction side pipe line 5 of the pump 3, and It consisted of 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 two-way valve 8. High pressure jet nozzle 1
In order to generate a fine bubble jet by decompressing a liquid obtained by pressurizing and dissolving air in hot water 2, a valve element which is opened and closed by the pressure inside the discharge-side pipe line 7 of the high-pressure jet nozzle 10 shown in FIG. 12 and a spring 13 for urging the valve element 12 are provided, and when the inside of the discharge side pipe line 7 reaches a predetermined pressure, the relief valve 14 opens and a fine bubble jet is opened. Was to occur. The low-pressure jet nozzle 9 has 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 as shown in FIG. 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 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 problem, and an object of the present invention is to provide a bubble generating nozzle device having a cleaning mechanism so that dust does not accumulate therein.

[0005]

In order to achieve the above object, a bubble generating nozzle according to the present invention comprises a main discharge pipe for passing a liquid and a sub-discharge pipe for passing a liquid in which gas is dissolved under pressure. Channel, a merging section provided on the downstream side of the main discharge line and the sub-discharge line, and a depressurization control of the liquid pressurized and dissolved by switching to the micro-section flow path or the large-section flow path connected to the sub-discharge path Pressure reducing means, a flow path switching means for switching a cross-sectional flow path of the pressure reducing means, and a return pipe through which liquid flows.

[0006]

According to the present invention, fine liquid bubbles are generated by passing a liquid obtained by pressurizing and dissolving a gas through a micro-section flow path and rapidly reducing the pressure of the liquid obtained by dissolving a gas under pressure.

[0007] On the other hand, when fine bubbles are generated, dust adheres to the micro-section flow path, and dust adhering to the micro-section flow path causes the pressure of the fluid applied when the liquid flows through the main discharge pipe and the return pipe to generate a dust. When the liquid flows, the micro-section flow path is switched to the large-section flow path due to the pressure difference from the pressure of the fluid.
Then, the dust adhering to the micro-section flow path flows downstream.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Reference numeral 21 denotes a circulation pump.
The discharge side 22 and the suction side 23 are connected by a branch circuit 25 via an ejector 24. Water tank 26 from discharge side 22
A main discharge circuit 27 and a sub-discharge circuit 28 are provided in the pipe, 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 30 is provided upstream of the main discharge line 27 and the sub discharge line 28.
The bubble generating nozzle 30 is connected to the main body case 31 and the main discharge line 3.
2, a sub-discharge pipeline 33, a junction 34 where the main discharge pipeline 32 and the sub-discharge pipeline 33 merge, an opening 35 and an air chamber 3
6, air valve 37, valve seat 39, valve body 39, valve seat 3
8, a pressure reducing means 41 composed of a groove 40 having a constant cross-sectional area, a jet nozzle 42 provided on the downstream side of the merging section 34, and a mixing section 43 provided on the downstream side of the jet nozzle 42. A variable jetting direction nozzle 44 provided downstream of the mixing section 43, a nozzle case 45 and a nozzle cover 46 for holding the variable jetting direction nozzle 44, a diaphragm 47 provided inside the main body case 31, and a valve seat. It comprises a diaphragm holder 49 for fixing a spring 48 for abutting the valve body 38 on the valve body 39, and a switching means 51 comprising a valve shaft 50 connecting the diaphragm holder 49 and the valve body 39. The air pipe 37 is connected to an air pipe 52 solenoid valve 53.

On the other hand, a three-way valve 55 is provided between the suction side 23 of the circulation pump 21, the branch circuit 25 and the return line 54. From the three-way valve 55 to the negative pressure portion 56 of the ejector 24
A suction circuit 57 is provided at the bottom. Further suction circuit 5
7 is provided with a solenoid valve 58. The negative pressure portion 56 of the ejector 24 is connected to the solenoid valve 60 through an air suction pipe 59.
Is connected. 61 is a controller, 62
Switches the type of bubble and turns on / off the bubble ejection
Or a switch for switching the type of bubble. Reference numeral 63 denotes water in the water tank 26, and reference numerals 64 and 65 denote arrows indicating the flow of water when normal bubbles or fine bubbles are generated, respectively. 6
Reference numerals 6 and 67 denote arrows indicating the flow of air when normal bubbles or fine bubbles are generated, respectively. 68 is a normal bubble having a bubble diameter of about 2 to 5 mm, and 69 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 41 forms a large flow path cross section 70 when the valve seat 38 and the valve body 39 are open, and the valve seat 38 and the valve body 39 are in contact with each other. At the time, a micro-section flow path 71 is formed.

Next, the operation of the above configuration will be described. First, the operation at the time of ejection of fine bubbles will be described with reference to FIG. 2. When the "fine" button of the switch 62 is pressed from a state where all of the bubbles are not operating, the solenoid valve 58 of the suction circuit 57 is opened by the controller 61 and the main discharge pipe is opened. The electromagnetic valve 29 of the passage 27 is closed, the electromagnetic valve 60 is opened / closed for a set time, and the three-way valve 55 is switched to the discharge side of the suction circuit 54 to operate the circulation pump 21. 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 63 in the water tank 26 is supplied to the suction circuit 57. From the negative pressure part 56 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 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 41, is in contact with the valve seat 38, and the water 63 flows through the micro-section flow path 71 of the groove 40 provided in the valve seat 38. 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 60 is operated in such an operating state, air is generated in the air suction pipe 59.
And is sucked into the negative pressure portion 56 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, and is sent from the sub-discharge pipe line 33 to the bubble ejection nozzle 30. At this time, the air sucked due to the high pressure in the sub-discharge circuit 28 and the sub-discharge pipeline 33 is in a state of being dissolved under pressure in the water 63. When the water 63 in which the air is dissolved is ejected from the minute channel cross section 71 formed when the valve body 39 and the valve seat 38 of the decompression means 41 of the bubble ejection nozzle 30 come into contact with each other, the pressure is rapidly reduced. As a result, the dissolved air becomes fine bubbles 69. The fine bubbles 69 are ejected from the nozzle 4
2. It is jetted into the water tank 26 through the mixing section 43 and the jetting direction variable nozzle 44. The water in the bathtub 26 is supplied to the suction port 72, the return line 54, the solenoid valve 58, the suction circuit 57, the ejector 2
4. The circulation pump 21 via the branch circuit 25 and the three-way valve 55
Return to

Further, when "OFF" of the switch 62 is pressed, the controller 61 operates to close the solenoid valve 60 and stop the circulation pump 21. Next, the suction circuit 57 side of the three-way valve 55 and the electromagnetic valve 58 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 the state where all the bubbles are not operating and the circulation pump 21 is filled with water 63, the switch 62 of the switch 62 is turned off. Press the "Large" button and the controller 6
1, the circulation pump 21 is operated, and at the same time, the solenoid valve 53 is opened. When the circulation pump 21 is operated, the water 63 discharged from the circulation pump 21 flows through the main discharge circuit 27, passes through the main discharge line 32 and the junction 34, is jetted from the jet nozzle 42, and flows into the mixing unit 43. At this time, a pressure difference is generated between the inside of the mixing section 43 and the opening section 35, and the air that has passed through the solenoid valve 53 and the air pipe 52, and has passed through the air chamber 36 in which the air pipe 37 is located, flows from the opening section 35 through the mixing section 43. And is mixed with the water 63 jetted from the jet nozzle 42 and jetted into the water tank 26 from the jet direction variable nozzle 44.

At this time, when water 63 flows through the main discharge pipe 32 and the return pipe 54, the pressure in the junction 37 rises and the pressure in the return pipe 54 drops. When the pressure difference between the junction 37 and the return pipe 54 becomes equal to or more than a certain value, the diaphragm 47 is pushed up to compress the spring 48, and at the same time, the valve shaft 50 and the valve body 39 connected to the diaphragm 47 rise, and the valve is raised. The seat 38 and the valve body 39 are opened. When the valve seat 38 and the valve body 39 are opened, a large-section flow path 70 is formed, and the main discharge pipe 2
The water 63 that has passed through 7 flows through the large-section flow path 70. As a result, dust that has accumulated in the micro-section flow passage 71 formed when the valve body 39 and the valve seat 38 contact each other is flushed, and is flushed into the bathtub 26 through the ejection nozzle 42.

Further, 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 55 and opening and closing the solenoid valve 29 and the solenoid valve 58, the normal bubble 68 is automatically generated,
It is possible to switch to the fine bubbles 69. In addition, valve seat 3
The cost can be reduced because the valve body 39 is opened and closed by the spring 48 and the diaphragm 47 with respect to 8. Also,
Since the diaphragm is provided between the mixing chamber 34 and the return pipe 54, even if the diaphragm is damaged, water leakage in the pipe does not occur.

[0017]

As is apparent from the above description, according to the bubble generating nozzle device of the present invention, the groove (microscopic) of the pressure reducing means is used to open the pressure reducing means by the pressure difference between the main discharge pipe and the return pipe. The dust adhering in the vicinity of the cross-sectional flow path is flushed out by the liquid flowing through the main discharge conduit, and has an effect that clogging of dust can be eliminated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional system configuration diagram of a main part showing an operation state of a bubble generating nozzle device according to an embodiment of the present invention when a normal bubble is generated.

FIG. 2 is a system configuration diagram of a cross section of a main part showing an operation state of the nozzle device when fine bubbles are generated.

FIG. 3 is a system configuration diagram of a conventional bubble generator.

FIG. 4 is an enlarged sectional view of a fine bubble generating nozzle of the apparatus.

FIG. 5 is an enlarged sectional view of a normal bubble generating nozzle of the apparatus.

[Explanation of symbols]

 Reference Signs List 30 bubble ejection nozzle 32 main discharge line 33 sub discharge line 34 junction 38 valve element 39 valve seat 40 groove (71 micro-section flow path) 54 return path 70 large-section flow path

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61H 23/00

Claims (1)

(57) [Claims] 1. A main discharge line through which a liquid flows, a sub-discharge line through which a liquid in which a gas is pressurized and dissolved, and a downstream side of the main discharge line and the sub-discharge line are provided. The merging section, a decompression means connected to the sub-discharge conduit, switching to a micro-section flow path or a large-section flow path, and decompression means for controlling the pressure of the liquid in which the gas is pressurized and dissolved, and a cross-section flow path of the decompression means A flow passage switching means for switching, and a return conduit for passing the liquid, wherein the large cross-sectional flow is formed when the pressure difference between the junction and the return conduit becomes a predetermined value or more. A bubble generation nozzle device that switches to the road.