JPH05161685A - Foam generating nozzle device - Google Patents

Abstract

PURPOSE:To prevent refuse from collecting in the inside by constituting the device so that a minute cross section flow passage is switched to a large cross section flow passage, when water exceeding a prescribed quantity flows in a duct line. CONSTITUTION:A foam generating nozzle 30 provided in the tip of a discharge circuit 27 of a circulating pump 21 is provided with a main body case 31, a main duct line 32, a sub-duct line 33, a joining part 34 in which both the duct lines 32, 33 are jointed, a valve body 35 and a minute cross section flow passage provided in a valve seat 36, a spring 38 for allowing the valve body 35 to abut on the valve seat 36, a diaphragm 39 for opening the valve body 35 and the valve seat 36 by pressure of the joining part 34 at the time when water of a prescribed quantity flows in the main duct line 32, and closing them at the time of being less than the prescribed quantity, a water injection nozzle 40 and an air pipe 41. Also, a pressure reducing means 65 is constituted of the valve body 35, the valve seat 36, the minute cross section flow passage 37 and a large cross section flow passage 63, and a switching means 64 is constituted of a valve shaft 66 for connecting the spring 38 and the diaphragm 39, and the valve body 35 and the diaphragm 39. In such a way, a refuse jam can be obviated.

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 bath.

[0002]

2. Description of the Related Art A conventional bubble generator of this type is shown in FIGS.
As shown in FIG. 7, 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 conduit 7 via a two-way valve 8. The high-pressure jet nozzle 10 is opened and closed by the pressure inside the discharge side pipe line 7 of the high-pressure jet nozzle 10 shown in FIG. 6 in order to decompress the liquid 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 and a spring 13 for urging 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.
Was opening and a fine bubble jet was being generated.
The low pressure jet nozzle 9 is provided with 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 as shown in FIG. 7 in order to generate a jet bubble jet.
The warm water 2 passing through the flow passage 15 is introduced into the wide chamber 18 from the narrow passage 17, and the air passing through the air inflow passage 16 is sent from the narrow passage 19 to the chamber 18 to be mixed in the chamber 18 and mixed with the nozzle 20. It was discharged as a jet bubble jet from (Japanese Patent Publication No. 3-7474).

[0003]

However, in the above-mentioned structure, since fine bubbles are generated in the gap between the valve body 12 and the inside of the discharge side pipe line 7, the valve body 12 and the high-pressure jet nozzle 10 are formed. The gap between the inside of the pipeline and the spring 1
There was a problem that garbage was collected in 3. Further, there is a problem in that the gap between the inside of the discharge side pipe 7 and the valve body 12 is not kept constant due to the flow of water flowing inside the discharge side pipe 7, and stable fine bubbles are not generated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a first object of the present invention to provide a bubble generating nozzle device having a cleaning mechanism for preventing dust from accumulating inside.
A second object is to provide a bubble generating nozzle device that ensures stable generation of a large amount of fine bubbles.

[0005]

In order to achieve the first object, the bubble generating nozzle device of the present invention comprises a main conduit for passing water and a sub-passage for passing a liquid in which gas is dissolved under pressure. Decompression of the pressurized and melted liquid which is connected to the sub-pipe and is switchable to a minute cross-section flow path or a large cross-section flow path. And a switching means for switching the cross-sectional flow path of the decompression means from the minute cross-section flow path to the large cross-section flow path when a certain amount of water or more flows in the main pipeline.

In order to achieve the second object, the pressure reducing means is provided with a valve seat, a valve body which opens and closes with respect to the valve seat, and a minute cross section formed when the valve body and the valve seat are in contact with each other. The flow path or the valve body and the cross-section flow path that switches to the large cross-section flow path formed when the valve seat is opened by the pressure of the merging portion are formed.

[0007]

With the above-described structure, the present invention makes it possible to generate fine bubbles by passing water in which gas is dissolved under pressure through a channel having a minute cross section and rapidly depressurizing water in which gas is dissolved under pressure.

On the other hand, when fine bubbles are generated, dust adheres to the fine cross-section flow path. The dust attached to the fine cross-section flow path is flown into the main pipeline by a certain amount of water or more, and the switching means causes the decompression means to generate minute dust. The cross-section flow path can be switched to the large cross-section flow path to allow dust adhering to the minute cross-section flow path to flow downstream.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 and FIG. 2, 21 is a circulation pump, and the discharge side 22 and the suction side 23 of the circulation pump 21 are connected by a branch circuit 25 via an ejector 24.
A discharge circuit 27 is piped from the discharge side 22 to the water tank 26, and an air separator 29 having an automatic air vent valve 28 is provided in the middle of the pipe. A bubble generation nozzle 30 is provided at the tip of the ejection circuit 27. In the bubble generating nozzle 30, a main body case 31, a main conduit 32, a sub conduit 33, and a merging portion 34 where the main conduit 32 and the sub conduit 33 merge.
A valve body 35, a valve seat 36, a groove (a minute cross-section flow path) 37 provided in the valve seat 36 and having a minute constant cross section, and a spring 38 for bringing the valve body 35 into contact with the valve seat 36. A diaphragm 39 that opens the valve seat 35 and the valve body 36 by the pressure of the merging portion 34 when a fixed amount of water flows in the main pipe 32 and closes the valve seat 36 when the amount of water is less than a certain amount, and downstream of the merging portion 34. Water jet nozzle 40 connected and provided, and water jet nozzle 40
And an air pipe 41 provided on the downstream side of the. A solenoid valve 44 is connected to the air pipe 41 via a gas suction pipe 42 and a check valve 43.

Further, the discharge circuit 27 is branched and connected to the main conduit 32 and the auxiliary conduit 33 which are the discharge circuit 27, and each is connected to the bubble generating nozzle 30. An electromagnetic valve 45 is provided in the main conduit 32.

On the other hand, on the suction side 23 of the circulation pump 21, a three-way valve 47 is connected between the branch circuit 25 and the suction circuit 46. From the three-way valve 47 to the negative pressure portion 48 of the ejector 24
A suction circuit 49 is connected to the. The negative pressure portion 48 of the ejector 24 is connected to the gas suction pipe 52 via a check valve 50 and a solenoid valve 51. Reference numeral 53 is a controller, and 54 is a switch for switching the type of bubble. 55 is water in the water tank 26, and 56 (FIG. 1), 57
(FIG. 2) is an arrow showing the flow of liquid when normal bubbles or fine bubbles are generated. Reference numerals 58 (FIG. 1) and 59 (FIG. 2) are arrows indicating the flow of air when normal bubbles or fine bubbles are generated. Reference numeral 60 is a bubble having a bubble diameter of about 2 to 5 mm, and 61 (FIG. 2) is a bubble diameter of 10
The fine bubbles are about 20 microns. In this embodiment, the pressure reducing means 65 is composed of a valve seat 35, a valve element 36, a minute cross section flow path 37, and a large cross section flow path 63. The switching means 64 includes a spring 38 and a diaphragm 39.
And the valve shaft 6 connecting the valve seat 35 and the diaphragm 39.
6 and 6.

The operation of the above configuration will be described. First, the operation at the time of jetting fine bubbles will be described with reference to FIGS.
When the "fine" button of the switch 54 is pressed while 5 is satisfied, the solenoid valve 45 is closed by the controller 53,
In addition, the discharge side 22 of the suction circuit 46 of the three-way valve 47 is closed, the electromagnetic valve 44 is closed, and the circulation pump 21 is operated. When the circulation pump 21 is operated, the water 55 discharged from the circulation pump 21 flows to the discharge circuit 27 and also to the branch circuit 25. At this time, the ejector 24 functions and the water 55 in the water tank 26 is discharged from the suction circuit 49. Ejector 2
It is sucked into the negative pressure portion 48 of No. 4. When the water 55 in the water tank 26 is sucked into the suction side 23 of the circulation pump 21, the circulation pump 2
The pressure on the suction side 23 of No. 1 increases. When the circulation pump 21 is operated in this state, the pressure on the discharge side 22 is increased. Because the valve body 35 and the valve seat 36 inside the bubble generating nozzle 30
Are brought into contact with each other by a spring 38, and water flows through a groove 37 provided in the valve seat 36 and having a minute constant cross-sectional area. Since the flow of water is rapidly reduced here, the circulation pump 21 is operating almost in the deadline operation state. Therefore, the pressure on the suction side 23 rises and the shut-off pressure of the circulation pump 21 is added, so that the pressure rise can be obtained.

In such an operating state, the solenoid valve 51
Is operated, the gas passes through the check valve 50 and is sucked into the negative pressure portion 48 of the ejector 24. The sucked gas enters the circulation pump 21 from the suction side 23 via the ejector 24 and the branch circuit 25, and is sent to the bubble jet nozzle 30 from the auxiliary pipe line 33 which is the discharge circuit 27. At this time, in the discharge circuit 27 and the auxiliary conduit 33, the air sucked due to the high pressure is dissolved in water. The water in which the air is dissolved is jetted into the water tank 26 from the groove (minute cross-section flow path) 37 having a constant cross-sectional area formed when the valve body 35 and the valve seat 36 of the bubble jet nozzle 30 are brought into contact with each other. Then, since the pressure is rapidly reduced, the dissolved air becomes fine bubbles 61 and spreads in the water tank 26 through the confluence portion 34 and the water ejection nozzle 40. The air separator 29 separates excess air that is not melted and discharges it from the automatic air vent valve 28. Bathtub 2
Water 55 in the suction port 62, suction circuit 46, three-way valve 4
7, the suction circuit 49, the ejector 24, and the branch circuit 25 to the circulation pump 21.

When the switch 54 is turned off, the controller 53 operates to stop the circulation pump 21 and the solenoid valve 51. Next, the controller 53 closes the suction circuit 49 side of the three-way valve 47 and opens the solenoid valve 45.

Next, 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 is operated in a state where everything is not operating and the circulation pump 21 is filled with water 55. When the “large” button 54 is pressed, the circulation pump 21 is operated by the controller 53, and at the same time, the solenoid valve 44 is opened. When the circulation pump 21 is operated, the water 55 discharged from the circulation pump 21 flows through the discharge circuit 27, flows through the main pipe 32, and flows into the merging portion 34. Further, after passing through the water jet nozzle 40, the air pipe 4
The air flowing from 1 through the solenoid valve 44, the check valve 43, and the air pipe 42 is ejected into the bath 26 while sucking the air. At this time, if a certain amount of water 55 or more flows from the main pipe 32, the pressure in the merging portion 34 rises, and when the pressure exceeds a certain amount, the diaphragm 39 is pushed up to compress the spring 38 and connect to the diaphragm 39. Valve body 3
5 rises and is opened from the valve seat 36. When the valve body 35 and the valve seat 36 are opened, a large cross-section flow passage 63 is formed, and the water 55 that has passed through the discharge circuit 27 and the auxiliary pipe 33 that is the pressure dissolution circuit passes through the large cross-section flow passage 63. It flows to the confluence part 34. Further, the water 55 flowing through the main pipe 32 comes to flow through the large cross section flow passage 63. For this reason, dust accumulated near the groove (fine cross-section flow path) 37 having a constant cross-sectional area formed when the valve body 35 and the valve seat 36 are in contact with each other is flowed through the water jet nozzle 40. It is poured into the bathtub 26.

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, stop the respective operating states. After that, the next bubble is ejected.

The above embodiment has the following effects. By switching the flow path of the three-way valve 47 and opening / closing the electromagnetic valve 44, two types of bubbles, that is, the fine bubbles 61 and the bubbles 60 of 2 to 5 mm can be automatically switched. Further, since the valve seat 36 is opened and closed with respect to the valve body 35 by the spring 38 and the diaphragm 39, the cost can be reduced.
In addition, 2 of fine bubbles 61 and bubbles 2 to 5 mm 60
Since it is possible to eject various types of bubbles with one bubble generation nozzle 30, it is possible to perform the hole construction work when attaching to the bathtub once, and the workability is improved.

[0018]

As is apparent from the above description, according to the bubble generating nozzle device of the present invention, in the first aspect of the invention, the depressurizing means is opened in order to open the depressurizing means by causing a certain amount of water to flow in the main pipeline. When a certain amount of water adhering to the vicinity of the groove (minute cross-section flow path) flows through the main pipe line, a certain amount of water is always discharged into the bathtub, and the effect of eliminating clogging with dust can be obtained.

Further, in the second aspect of the invention, since the pressure reducing means is constituted by the valve seat, the valve body, and the cross section of a constant flow path (a minute cross-section flow path) where the valve seat and the valve body are in contact, a stable fine pressure is provided. It becomes possible to generate bubbles. Further, since the spring and the diaphragm are used to open and close the valve seat and the valve body, the cost can be reduced.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional system configuration diagram of essential parts showing an operating state of the nozzle device when fine bubbles are generated.

FIG. 3 is a partial cross-sectional view of a nozzle portion of the nozzle device when normal bubbles are generated.

FIG. 4 is a partial cross-sectional view of a nozzle portion of the nozzle device when fine bubbles are generated.

FIG. 5 is a system configuration diagram of a conventional bubble generator.

FIG. 6 is an enlarged cross-sectional view of a fine bubble generating nozzle of the bubble generating device.

FIG. 7 is an enlarged cross-sectional view of a normal bubble generating nozzle of the bubble generating device.

[Explanation of symbols]

 30 Bubble Generation Nozzle 32 Main Pipeline 33 Sub-Pipeline 34 Merging Section 35 Valve Body 36 Valve Seat 37 Groove (Fine Section Flow Path) 63 Large Section Flow Path

Claims (2)

[Claims] 1. A main pipeline for passing water, a sub pipeline for passing a liquid in which a gas is pressurized and dissolved in water, and a confluence section provided downstream of the main pipeline and the sub pipeline. The main pipe is provided with a decompression unit for the pressurized and melted liquid that is connected to the sub-pipe line and can be switched to a micro-section flow channel or a large-section flow channel, and a flow channel switching unit that switches the cross-section flow channel of the decompression unit. A bubble generating nozzle device for switching the minute cross-section flow path to the large cross-section flow path when a certain amount of water or more flows in the path. 2. A depressurizing means, a valve seat, a valve body that opens and closes with respect to the valve seat, a minute cross-sectional flow path formed when the valve body and the valve seat abut, or the valve body and the valve. The bubble generating nozzle device according to claim 1, wherein the seat has a cross-section flow path that switches to a large cross-section flow path formed when the seat is opened by the pressure of the confluence portion.