JPH0568700A - Fine bubble generator - Google Patents

Abstract

PURPOSE:To satisfactorily operate a pump unit for a long time. CONSTITUTION:A fine bubble pouring pipe 13 is provided between a fine bubble pouring port 10, which is provided at a tank body 8, and an accumulator 4. A jet stream pouring pipe 14 branched from the middle of the pouring pipe 13 is located on a jet stream pouring port 16 provided at the tank body 8. A switching valve 15 is provided at a branching part between the pouring pipe 13 and the jet stream pouring pipe 14. A detecting means 20 is provided at the switching valve 15 so as to stop or operate a water level detecting means 6 provided at the accumulator 4 corresponding to the kind of pouring water to be poured into the tank body 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine bubble generator for precipitating fine bubbles by dissolving a gas such as air or carbon dioxide in a liquid such as bath water under pressure and then reducing the pressure.

[0002]

2. Description of the Related Art In recent years, there have been provided various kinds of bath water in which fine air bubbles can be generated to enjoy a hot spring bath.
No. 89 has been filed. In this device, a fine bubble generator is provided in the vicinity of a bath 8a as a tank body 8, and the fine bubble generator is used to generate fine bubbles in the bath water. As the fine bubble generator, a liquid supply pipe 1 through which a liquid passes, a gas supply pipe 2 connected to the liquid supply pipe 1, and a liquid provided in the middle of the liquid supply pipe 2 to pressurize the liquid to form a gas in the liquid. A pressure pump 3 for dissolving
Accumulator 4 for separating excess gas that could not be completely dissolved by pressurizing pump 3, and accumulator 4 for a set time or longer
The main body is constituted by the pump unit A provided with the water level detecting means 6 provided in the accumulator 4 for stopping the pump unit A when water is not supplied therein. Then, by operating the pressurizing pump 3 by the motor 11, the bath water is sucked into the pipeline from the water suction port 7, and the pressurizing pump 3 and the water suction port 7 are sucked along with the suction of the bath water.
Gas is sucked into the pipeline from the supply unit provided between the bath water and the mixed bath water is pressurized by the pressurizing pump 3, whereby the gas is dissolved in the bath water. , The bath water in which the required amount of gas is dissolved by the water level detecting means 6 is again passed through the accumulator 4 from the discharge port 10 to the bath 8a
The fine bubbles are deposited in the bathtub 8a by discharging the bubbles into the bathtub 8a. And, the applicant is the bathtub 8
Liquid supply pipe 1 provided between a and the accumulator 4
The jet discharge pipe 14 is branched by the switching valve 15.
It was considered that the liquid in which the gas is not pressure-melted is vigorously ejected into the bath 8a via the jet discharge pipe 14. This regulates the gas supplied from the gas supply pipe 2 to the liquid supply pipe 1, whereby the liquid in which the gas is not pressurized and melted is vigorously ejected into the bath 8a.
Here, the water level detection means 6 remains in the previously operated state. Reference numeral 9 is an electromagnetic valve provided in the gas supply pipe 2, and reference numeral 5 is an excess gas return pipe for returning the excess gas generated in the accumulator 4 to the gas supply pipe 2.

[0003]

However, in the conventional example as described above, the gas supply pipe 1 to the liquid supply pipe 2 are used.
There is a case where a large amount of gas is unexpectedly supplied, and when a large amount of gas is supplied like this, there is a problem that the jet flow becomes weak due to the mixing of the gas, and also in such a large amount. When gas is supplied and a large amount of excess gas is generated in the accumulator 4, there is a problem that the water level detection means 6 provided in the accumulator 4 operates and the pump unit stops during bathing.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a fine bubble generator capable of operating a pump unit satisfactorily for a long period of time.

[0005]

In the present invention, in order to achieve the above object, a liquid supply pipe 1 through which a liquid passes, and a gas which is connected to the liquid supply pipe 1 and supplies into the liquid supply pipe 1. A pressure pump 3 which is provided in the middle of the gas supply pipe 2 and the liquid supply pipe 1 and pressurizes and dissolves the gas in the liquid.
And an accumulator 4 for separating undissolved gas, and an accumulator 4 for stopping the pump unit A when water is not supplied into the accumulator 4 for a set time or longer.
In the fine bubble generator including a pump unit A including a water level detection means 6 provided in the above and a surplus gas return pipe 5 for returning the surplus gas separated by the accumulator 4 to the gas supply pipe 2, A fine discharge pipe 13 is provided between the fine discharge port 10 and the accumulator 4, and a jet discharge pipe 14 branched from the middle of the fine discharge pipe 13 is connected to a jet discharge port 16 provided in the tank body 8. No, fine discharge pipe 1
3 is provided with a switching valve 15 at a branch portion of the jet discharge pipe 14,
The switching valve 15 is provided with detection means 20 for stopping or activating the water level detection means 6 provided in the accumulator 4 according to the type of discharge water to be discharged into the tank body 8.

[0006]

However, by switching the switching valve 15, the jet flow or the fine flow is selectively discharged from either the jet discharge port 14 or the fine discharge port 13. Then, the water level detection means 6 is stopped or operated by the detection means 20 provided in the switching valve 15 in accordance with the switching of the switching valve 15, that is, the switching valve 15 is switched and the jet outlet. When the jet flow is discharged from 14, the water level detection means 6 is not stopped and the supply of gas from the gas supply pipe 2 is not stopped, and the water level detection means 6 operates to stop the pump unit A. In addition, when the switching valve 15 is switched and fine bubbles are discharged from the fine discharge port 10, the water level detecting means 6 operates to accurately control the gas supply amount. As a result, desired fine bubbles are discharged from the fine discharge port 13 into the tank body 8.

[0007]

The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 shows an embodiment of a fine bubble generator, which is attached to a bathtub 8a as a tank body 8, and shows an embodiment in the case of ejecting fine bubbles into the bathtub 8a. .. The fine bubble generator is a device that dissolves a gas in a liquid by mixing a gas and a liquid and pressurizes the liquid, and then reduces the pressure of the liquid again to generate fine bubbles. There is. As the configuration of the pump unit A, as shown in FIG. 1, a liquid supply pipe 1 through which liquid passes, a gas supply pipe 2 connected to the liquid supply pipe 1 and supplying gas into the liquid supply pipe 1, a liquid supply pipe 1, a pressurizing pump 3 for pressurizing and dissolving gas in a liquid, a large accumulator 4 for separating undissolved gas, and surplus gas for returning surplus gas separated by the accumulator 4 to the gas supply pipe 2. The return pipe 5 and the gas supply pipe 2 are provided with the solenoid valve 9 for supplying a fixed amount of gas into the gas supply pipe 2.

One end of the liquid supply pipe 1 is a water suction port 7 of a bath 8a.
, And the other end is connected to the discharge port 10 of the bathtub 8a, and the bath water in the bathtub 8a absorbed by the water suction port 7 passes through the liquid supply pipe 1 and again into the bathtub 8a from the discharge port 10. It is supposed to be spouted on. The pressurizing pump 3 is provided in the middle of the liquid supply pipe 1 so that the pressurizing pump 3 can absorb the bath water in the bath 8a from the water inlet 7 and discharge it from the outlet 10. Liquid supply pipe 1
A gas supply pipe 2 for supplying a gas such as air or carbon dioxide is connected to the liquid supply pipe 1 between the pressurizing pump 3 and the water suction port 7, and a fixed amount is provided at the tip end thereof via an air filter 12. An electromagnetic valve 9 for supplying gas into the gas supply pipe 2 is provided. The opening / closing operation of the solenoid valve 9 is controlled by the water level detecting means 6 described later. A large accumulator 4 for separating the liquid and the surplus gas is arranged between the pressurizing pump 3 and the discharge port 10, and a gas retention part (not shown) in which the separated surplus gas is accumulated in the accumulator 4. Is provided, and a surplus gas return pipe 5 for returning the surplus gas to the gas supply pipe 2 is led out from the gas retention portion. The accumulator 4 is provided with water level detection means 6 that stops all the functions of the pump unit A when water is not supplied to the accumulator 4 for a set time or longer. The water level detecting means 6 can detect a case where the water intake port 7 or the discharge port 10 is clogged for some reason or a state where a large amount of air has entered the accumulator 4, and is separated from the accumulator 4. Let accumulator 4
It is constituted by a pair of electrode rods arranged inside. A current of AC8V, 0.4mA is applied to each electrode rod. If no current flows between the two poles, it is detected that there is no water in the accumulator 4, and when a current flows between the two poles. It is designed to detect the presence of water. That is, when the bath water is supplied into the accumulator 4 and the water surface rises, both electrode rods are immersed in the bath water, and an electric current flows between the two electrodes to detect the presence of water in the accumulator 4. At the same time, it is detected that the bath water is circulating in the pump unit A, and the bath water in the accumulator 4 is discharged from the discharge port 10 into the bath 8a so that the water surface is gradually lowered and the bath water becomes an electrode. Accumulator 4 at a distance
It is detected that the amount of water for bath in the accumulator 4 is reduced and there is no water in the accumulator 4. Then, when a current flows between both electrode rods and it is detected that water is present in the accumulator 4, the solenoid valve 9 for supplying the gas through the gas supply pipe 2 is opened for 5 seconds to supply the gas. Is. Further, when the water level in the accumulator 4 is low and there is not much water in the accumulator 4, and the current does not flow between the electrode rods, the solenoid valve 9 is operated so as not to be opened. The solenoid valve 9 will not be opened until after. Here, once the solenoid valve 9 is opened, it remains open for 5 seconds regardless of the state of the water level in the accumulator 4.

A switching valve 15 is provided in the middle of a fine discharge pipe 13 between the fine discharge port 10 provided in the bath 8a and the accumulator 4, and a jet discharge pipe 14 is led out from the switch valve 15. The jet discharge pipe 14 is connected to a jet discharge port 16 provided in the bath 8a. The switching valve 15 is provided with detection means 20 for stopping or operating the water level detection means 6 provided in the accumulator 4 according to the type of discharge water to be discharged into the bath 8a, and switching of the flow path. The water level detecting means 6 is automatically turned on and off by switching the switching valve 15 so that the jet flow can be discharged from the jet discharge port 16 into the bath 8a. By switching, it is possible to discharge fine bubbles from the fine discharge port 10 into the bath 8a.

The fine bubbles are generated in the liquid in the bath 8a by turning on the operation switch of the fine bubble generator to operate each equipment constituting the pump unit A. The operation of each member constituting the pump unit A will be described in detail below. When the operation switch is turned on, the pressurizing pump 3 is operated by the motor 11, and the suction water by the pressurizing pump 3 draws the bath water in the bath 8a into the liquid supply pipe 1 from the water inlet 7. When the bath water flows through the liquid supply pipe 1 toward the pressurizing pump 3, air is sucked into the liquid supply pipe 1 from the gas supply pipe 2 by the flow of the liquid passing through the liquid supply pipe 1 and mixed with the bath water. It is pressurized by the pressure pump 3 and the gas is dissolved under pressure in the bath water. Here, when the bath water is almost full in the accumulator 4, a current is passed between the two poles of each electrode rod at the same time when the operation switch is turned on to detect that the accumulator 4 is full. 6 detects and sends a signal to open the solenoid valve 9 from the detection means 6 to the solenoid valve 9 to open the solenoid valve 9, and gas is supplied from the solenoid valve 9 at the same time when the operation of the pump unit A is started and the bath water is discharged. The dissolution of the gas under pressure is started. Also, the accumulator 4
When there is no bath water inside, the detection means 6 detects that there is no bath water inside the accumulator 4 because no current flows between the two electrodes of the electrode rod, and the solenoid valve 9 is closed for a while. The pump unit A is operated without supplying gas, and the operation is performed so that the bath water in the accumulator 4 accumulates up to a certain water level. A large amount of air is prevented from being discharged. In order to increase the efficiency of air dissolution by the pressure pump 3, it is necessary to supply an excessive amount of gas with respect to the amount of gas that actually dissolves, and even if the pressure pump 3 pressurizes a large amount of undissolved gas. Gas is present. Therefore, the surplus gas is separated by the accumulator 4, and the surplus gas is returned to the gas supply pipe 2 from the surplus gas return pipe 5 derived from the accumulator 4. Here, the exhaust gas of the surplus gas returned to the gas supply pipe 2 via the surplus gas return pipe 5 is adjusted so that the pressure in the accumulator 4 and the surplus gas are not exhausted. In other words, the bath water in which the air is dissolved is sent to the discharge port 10 through the liquid supply pipe 1 while being pressurized, but during this process, when passing through the accumulator 4, the accumulator 4 In addition to its general function of absorbing the pulsation of the bath water and absorbing the impact pressure, it promotes the dissolution of air that could not be completely dissolved by the pressure applied by the pressure pump 3, and it was not dissolved yet The surplus gas mixed in water is floated above the accumulator 4 to separate the surplus gas from the bath water, and the surplus gas in the accumulator 4 is not exhausted from the surplus gas return pipe 5. It is like this. The bath water that has passed through the accumulator 4 is in a state where the gas is dissolved in a high concentration, and the bath water in which the gas is dissolved in the high concentration is jetted again from the discharge port 10 into the bath 8a. Since the pressure of the water is suddenly released from the pressurized state, the gas dissolved in the bath water is deposited and becomes fine bubbles to be generated in the bath water in the bath 8a. The above operation is repeated to generate fine bubbles in the bath 8a.

Then, the detection means 6 in the accumulator 4
When the interval of the ON signal of the solenoid valve 9 to be entered exceeds 3 minutes, it is determined that the water inlet 7 is clogged and all the functions of the pump unit A are stopped to prevent the pump unit A from being damaged. Is becoming In other words, both electrode rods need to be immersed in the bath water in order to turn on the solenoid valve 9, but the bath water is supplied to the accumulator 4 because the electrode rods have not been submerged in water for a predetermined time or more, that is, for 3 minutes or more. If it is not, the pump unit A is detected by detecting that the water intake port 7 is clogged by the detection means 6 composed of an electrode rod.
Is stopped, and the pump unit A is stopped so that the pressurizing pump 3 does not idle and only bubbles larger than the discharge port 10 are not discharged. Here, even if the ON signal of the solenoid valve 9 is not input for 3 minutes after the operation signal from the operation switch is input, it is determined that the water inlet 7 is clogged and all the functions of the pump unit A are stopped. There is. In addition, after the ON signal of the solenoid valve 9 is once input from the detection means 4 in the accumulator 4, 2
If the same ON signal is input again within 0 seconds, discharge port 1
The detection unit 6 judges that the 0 is clogged and the pump unit A
It is supposed to stop all functions of. That is, when the discharge port 10 is clogged for some reason and the bath water is not discharged from the discharge port 10 and the bath water is full in the accumulator 4, the electrode rod is immersed in the bath water. As a result, the ON signal of the solenoid valve 9 is continuously output. However, once the ON signal is output, the ON signal is continuously output again within 20 seconds, so that the discharge port 10 is clogged. In this state, it is detected that the bath water is full in the accumulator 4, and all the functions of the pump unit A are stopped so that the pump unit A is not loaded.

When the bath water is jetted vigorously into the bathtub 8a, the switching valve 15 is switched to jet the bathwater vigorously into the bathtub 8a via the jet flow discharge pipe 14 and the jet flow discharge port 16. Is. At this time, the switching valve 1 is transferred from the detection means 20 provided in the switching valve 15 to the control unit.
5 sends a signal indicating that the water has been switched to the jet discharge port 16 side, whereby the water level detection means 6 is stopped and the solenoid valve 9 is fully closed to stop the gas supply, and the bath water is removed. It will be vigorously ejected into the bathtub 8a.

[0013]

As described above, the present invention provides the fine discharge pipe between the fine discharge port and the accumulator provided in the tank body, and the jet discharge pipe branched from the middle of the fine discharge pipe is provided in the tank body. A switching valve is provided at the branch portion of the fine discharge pipe and the jet discharge pipe facing the provided jet discharge port, and this switching valve is provided in the accumulator according to the type of discharge water to be discharged into the tank. Since the detecting means for stopping or activating the water level detecting means provided is provided, the water level detecting means is stopped or operated by the detecting means provided in the switching valve in accordance with the switching of the switching valve. That is, when the switching valve is switched and the jet flow is being discharged from the jet discharge port, the water level detection means is not stopped and the gas supply from the gas supply pipe is not stopped, and the water level detection means operates. Does not stop the pump unit, and when the switching valve is switched and fine bubbles are discharged from the fine discharge port, the water level detection means operates and the gas supply amount is accurate. The desired fine air bubbles are discharged into the tank body through the fine discharge port by controlling the above, and the pump unit can be satisfactorily operated for a long period of time.

[Brief description of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention.

FIG. 2 is a system diagram of a conventional example.

[Explanation of symbols]

 1 Liquid Supply Pipe 2 Gas Supply Pipe 3 Pressurizing Pump 4 Accumulator 5 Excess Gas Return Pipe 6 Water Level Detector 8 Tank Body 10 Fine Discharge Port 13 Fine Discharge Pipe 14 Jet Flow Discharge Port 15 Switching Valve 16 Jet Flow Discharge Port 20 Detection Means A Pump unit

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[Procedure amendment]

[Submission date] October 21, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

[0005]

In the present invention, in order to achieve the above object, a liquid supply pipe 1 through which a liquid passes, and a gas which is connected to the liquid supply pipe 1 and supplies into the liquid supply pipe 1. A pressure pump 3 which is provided in the middle of the gas supply pipe 2 and the liquid supply pipe 1 and pressurizes and dissolves the gas in the liquid.
And an accumulator 4 for separating undissolved gas, and when the air for fine bubbles disappears in the accumulator 4.
A water level detecting means 6 provided in the accumulator 4 for opening the solenoid valve 9 to supply air, and the accumulator 4
In the fine bubble generator provided with the pump unit A configured with the surplus gas return pipe 5 for returning the surplus gas separated in step 1 to the gas supply pipe 2, the fine discharge port 1 provided in the tank body 8
A fine discharge pipe 13 is provided between 0 and the accumulator 4,
A jet discharge pipe 14 branched from the middle of the fine discharge pipe 13 is made to face a jet discharge port 16 provided in the tank body 8, and a switching valve 15 is provided at a branch portion between the fine discharge pipe 13 and the jet discharge pipe 14. The switching valve 15 is provided with detection means 20 for stopping or activating the water level detection means 6 provided in the accumulator 4 according to the type of discharge water to be discharged into the tank body 8.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

One end of the liquid supply pipe 1 is a water suction port 7 of a bath 8a.
, And the other end is connected to the discharge port 10 of the bathtub 8a, and the bath water in the bathtub 8a absorbed by the water suction port 7 passes through the liquid supply pipe 1 and again into the bathtub 8a from the discharge port 10. It is supposed to be spouted on. The pressurizing pump 3 is provided in the middle of the liquid supply pipe 1 so that the pressurizing pump 3 can absorb the bath water in the bath 8a from the water inlet 7 and discharge it from the outlet 10. Liquid supply pipe 1
A gas supply pipe 2 for supplying a gas such as air or carbon dioxide to the liquid supply pipe 1 between the pressurizing pump 3 and the water suction port 7 is connected to the tip of the liquid supply pipe 1 through an air filter 12 in a fixed amount. An electromagnetic valve 9 for supplying gas into the gas supply pipe 2 is provided. The opening / closing operation of the electromagnetic valve 9 is controlled by the water level detecting means 6 described later. A large accumulator 4 for separating the liquid and the surplus gas is arranged between the pressurizing pump 3 and the discharge port 10, and a gas retention part (not shown) in which the separated surplus gas is accumulated in the accumulator 4. Is provided, and a surplus gas return pipe 5 for returning the surplus gas to the gas supply pipe 2 is led out from the gas retention portion. Fine in the accumulator 4 to accumulator 4
When the air for air bubbles is exhausted, open the solenoid valve 9
A water level detecting means 6 for supplying the water is provided. The water level detecting means 6 can detect a case where the water intake port 7 or the discharge port 10 is clogged for some reason or a state where a large amount of air has entered the accumulator 4, and is separated from the accumulator 4. It is configured by a pair of electrode rods arranged in the accumulator 4. A current of AC8V, 0.4mA is applied to each electrode rod. If no current flows between the two poles, it is detected that there is no water in the accumulator 4, and when a current flows between the two poles. It is designed to detect the presence of water. That is,
When the bath water is supplied into the accumulator 4 and the water surface rises, both electrode rods are immersed in the bath water, and a current flows between the two electrodes to detect the presence of water in the accumulator 4 and to pump the water. It is detected that the bath water is circulating in the unit A, and the bath water in the accumulator 4 is discharged from the discharge port 10 into the bath 8a, the water surface is gradually lowered, and the bath water is separated from the electrode rod. The bath water in the accumulator 4 is reduced and it is detected that there is no water in the accumulator 4. Then, when an electric current flows between both electrode rods and it is detected that water is present in the accumulator 4, a solenoid valve 9 for supplying gas through the gas supply pipe 2 is detected.
Is opened for 5 seconds and gas is supplied. Also,
When the water level in the accumulator 4 is low and there is not much water in the accumulator 4 and no current flows between the electrode rods, the solenoid valve 9 is operated so as not to be opened.
The solenoid valve 9 is prevented from opening until the electrode rod is submerged in water. Here, once the solenoid valve 9 is opened, it remains open for 5 seconds regardless of the state of the water level in the accumulator 4.

Claims (1)

[Claims] 1. A fine bubble generator for precipitating fine bubbles by mixing a gas and a liquid and pressurizing the gas to dissolve the gas in the liquid and depressurizing the liquid again.
A liquid supply pipe through which liquid passes, a gas supply pipe connected to the liquid supply pipe and supplying gas into the liquid supply pipe, and a pressurizing device that is provided in the middle of the liquid supply pipe and pressurizes and dissolves gas in the liquid A pump, an accumulator that separates undissolved gas, a water level detection means provided in the accumulator to stop the pump unit when water is not supplied to the accumulator for a set time, and excess gas separated by the accumulator. In a fine bubble generator provided with a pump unit configured with a surplus gas return pipe for returning the gas to the gas supply pipe, a fine discharge pipe is provided between the fine discharge port provided in the tank body and the accumulator, and the fine discharge pipe The jet discharge pipe branched from the middle of the tank faces the jet discharge port provided in the tank body, and a switching valve is provided at the branch portion between the fine discharge pipe and the jet discharge pipe. Fine bubble generating apparatus characterized by comprising providing a sensing means for stopping or activating the water level detection means provided in the accumulator according to the type of discharge water to the switching valve so that the discharged the bath body.