JP2013136017A - Ozone liquid generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone liquid generator preventing leakage of ozone gas due to a decrease in water level in an ozone liquid tank when discharging ozone liquid after the ozone liquid generator is stopped, in the ozone liquid generator.SOLUTION: In an ozone liquid generator including an ozone generator for generating ozone gas, a gas-liquid mixer for mixing the ozone gas and liquid to generate ozone liquid; a gas-liquid separator for performing gas-liquid separation of the ozone liquid; an opening/closing controller for controlling the flow of gas lead out from a gas lead-out port of the gas-liquid separator in accordance with a liquid storage amount of the gas-liquid separator; and a gas introducer having a check valve, for introducing gas to the ozone liquid generator from the outside. A valve opening pressure is set to the check valve. The valve opening pressure is equal to or more than a water head difference from a water level in which the ozone gas does not leak from a water discharge port in the gas-liquid separation means to a water level of the water discharge port.

Description

  The present invention relates to an ozone liquid generating device that generates ozone liquid.

  Conventionally, an ozone liquid generator includes an ozone generator and a gas-liquid mixer, and generates ozone liquid by mixing ozone gas generated by the ozone generator with a liquid such as water. There are two types of ozone liquid generators: a non-circulation type and a circulation type.

  FIG. 5 is a schematic view of a non-circulating ozone water generator 500 disclosed in Patent Document 1. The ozone water generator 500 mixes the ozone gas generated by the ozone generating means 501 with a liquid such as water with the ozone mixing and dissolving means 502 to generate ozone water, and the ozone gas remaining without being dissolved in the liquid such as water is Once stocked in the ozone water tank 503 and sent to the processing unit 504, the gas is decomposed and discharged to the outside, or the ozone concentration is adjusted so as not to affect the human body through an ozone filter or the like and then discharged to the outside. Is done.

  FIG. 6 is a cross-sectional view of the ozone water tank 503 of the ozone water generator 500 disclosed in this document. The ozone water tank 503 is divided into an upper chamber 61 and a lower chamber 62 by a separator 60, and the separator 60 is a gas-liquid separation cylinder having a center bulging downward and a slit 63 formed in the peripheral surface. 64, an ozone mixed water inlet 65 is disposed at the upper part of the lower chamber 62, an ozone water discharge port 66 is disposed at the lower part of the lower chamber 62, and an exhaust for exhausting excess ozone gas at the ceiling of the upper chamber 61. A port 67 is provided, and an opening / closing mechanism 68 for opening and closing the exhaust port 67 is disposed below the exhaust port 67. A float that rises and falls in response to fluctuations in the water level of ozone water is provided inside the gas-liquid separation cylinder 64. 69, and the opening / closing mechanism 68 opens and closes the exhaust port 67 in conjunction with the rising and lowering of the float 69.

  On the other hand, the circulation type ozone water generator as shown in Patent Document 2 collects ozone gas remaining without being dissolved in a liquid such as water when ozone water is generated, and sends it to the ozone generator again. In this method, ozone gas having a higher concentration is generated using the exhausted ozone gas. Most of the ozone gas generated by the ozone generator cannot be completely dissolved in water, so in the non-circular ozone liquid generator, the efficiency of ozone liquid generation is poor, The utilization efficiency of ozone gas can be increased.

  FIG. 7 is a block diagram showing the overall configuration of the ozone water generator 700 disclosed in Patent Document 1. As shown in FIG. The ozone water generator 700 includes an ozone generator 701, a gas-liquid mixer 702, a sealed tank 703 having a function of separating gas and liquid into a gas, and a gas return path 704 that connects the sealed tank 703 and the ozone generator 701. The ozone gas separated by the sealed tank 703 is supplied to the ozone generator 701 via the gas return path 704 and the dehumidifier 705. For this reason, it is possible to reuse the undissolved ozone gas contained in the exhaust gas.

Japanese Patent Laid-Open No. 2002-5301 (published February 19, 2002) Japanese Patent Laid-Open No. 2-207892 (published on August 17, 1990)

  However, in the ozone water generator and the ozone water generator shown in Patent Document 1 and Patent Document 2, when the devices are stopped, the operations of the ozone generator and the gas-liquid mixer are stopped, and the generated ozone water is generated. Therefore, there is a possibility that the ozone water level in the ozone water tank keeps decreasing and ozone gas is discharged together with the ozone water drainage. That is, there is a problem that harmful ozone gas leaks outside without being treated.

  The present invention has been made in view of the above problems, and the purpose of the ozone liquid (= ozone water) generator is to determine the water level in the ozone liquid tank when the ozone liquid is drained after the ozone liquid generator is stopped. An ozone liquid generation device that prevents leakage of ozone gas due to a decrease is provided.

  An ozone liquid generating device according to the present invention includes ozone generating means for generating ozone gas, gas-liquid mixing means for mixing the ozone gas and liquid to generate ozone liquid, and gas-liquid separating means for gas-liquid separating the ozone liquid. And an open / close control means for controlling the flow of the gas led out from the gas lead-out port of the gas-liquid separation means according to the amount of liquid stored in the gas-liquid separation means; In the ozone liquid generation apparatus provided with the gas introduction means for introducing gas into the check valve, a valve opening pressure is set for the check valve, and the valve opening pressure is generated by ozone gas from a drain outlet in the gas liquid separation means. It is characterized in that it is more than the water head difference from the water level that does not leak to the water level at the drain.

  Further, the valve opening pressure may be equal to or greater than a water head difference from an operating water level of the opening / closing control means to a water level of a drain outlet of the ozone liquid generating device.

  In addition, the ozone liquid generation device includes a detection unit that detects a water level of the ozone liquid, and a valve opening pressure control unit that controls a valve opening pressure of the check valve based on the water level detected by the detection unit. It is characterized by that.

  The ozone liquid generation device may include a circulation path for circulating gas between the ozone generator, the gas-liquid mixing means, and the gas-liquid separation means.

  According to the ozone liquid generation device of the present invention, it is possible to realize an ozone liquid generation device that prevents leakage of ozone gas due to a decrease in the water level in the ozone liquid tank when the ozone liquid is drained after the ozone liquid generation device is stopped. Become.

It is the schematic of the ozone liquid production | generation apparatus which concerns on embodiment. It is a figure which shows the liquid storage tank provided with the float valve. It is sectional drawing which showed an example of the non-return valve which concerns on embodiment. It is the schematic of the ozone liquid production | generation apparatus which concerns on embodiment. It is the schematic of the ozone water generator in a prior art. It is a schematic sectional drawing of the ozone water tank of the ozone water generator in a prior art. It is the schematic of the ozone water production | generation apparatus in a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

<Embodiment 1>
FIG. 1 is a schematic diagram of an ozone liquid generation apparatus 100 according to the present embodiment. In the present embodiment, a circulation type ozone liquid generator is described as an example, but the present invention can also be applied to a non-circulation type ozone liquid generator.

  An ozone generator 101 that generates ozone gas, a gas-liquid mixing unit 102 that mixes liquid and ozone gas, a liquid storage tank 103 that stores liquid, and a gas from outside the ozone generator 100 are introduced into the ozone liquid generator 100. In order to circulate the gas or liquid between the gas introducing means 104 and the devices, a circulation path A including paths a, b, and c is provided.

  The ozone generator 101 is formed by an inlet 106 connected to a path a for introducing a gas such as air or oxygen, and an electrode such as a metal, and an ozone generating electrode that generates ozone gas using the introduced air or oxygen as a material. And an outlet 107 for leading out ozone gas. Ozone gas is generated from oxygen introduced from the inlet 106 or a part of oxygen contained in the air, and is led out from the outlet 107. Here, as long as the ozone generator 101 is a structure which produces | generates ozone gas from gas, such as air and oxygen introduce | transduced, it is possible to use a general ozone generator.

  The gas-liquid mixing unit 102 is connected to the introduction port 108 for introducing a liquid such as water from the outside of the ozone liquid generating apparatus 100, the introduction port 109 for introducing a gas such as ozone gas or air, and the route c. The outlet 110 is connected to lead out a gas-liquid mixture obtained by mixing gas and liquid. A liquid such as water introduced from the introduction port 108 is mixed with a gas such as air or ozone gas introduced from the introduction port 109, and is led out from the outlet 110 as a gas-liquid mixture such as ozone liquid.

  Here, the gas-liquid mixture refers to a liquid in which a gas is dissolved in a liquid, or a liquid in which a gas is contained in a liquid as bubbles, and an ozone liquid refers to an ozone solution or a liquid in which ozone gas is dissolved in a liquid. An ozone bubble liquid in which ozone gas is mixed as bubbles is included. The liquid mixed with ozone gas is water, a cultivation nutrient solution used as an agricultural solvent, a solution used as a medical solvent, or the like.

  The liquid storage tank 103 is composed of a sealable container that can store liquid or gas. An inlet 111 connected to the path c for introducing a liquid, a drain outlet 112 for leading a liquid such as water or ozone liquid to the outside of the ozone liquid generator 100, and a gas such as air or ozone gas connected to the path a. And a gas outlet 113 for deriving.

  The liquid introduced from the inlet 111 is separated into gas and liquid in the liquid storage tank 103 which is a gas-liquid separation means. Here, the sealable container includes not a physically sealed space but a container having a space in which a gas is confined by a liquid. If the gas can be sealed in the container, it is always expressed as a sealed state even if water is led out from the drain port 112. The shape of the liquid storage tank 103 may be formed in a general shape such as a cylinder, a polygonal column, a polygonal pyramid, or a conical shape. Further, the size of the liquid storage tank 103 can be appropriately adjusted according to the design, and a part of the piping may be expanded to form a liquid storage tank.

  For example, in the case of introducing the ozone liquid from the inlet 111 of the liquid storage tank 103, the liquid storage tank 103 has some separation of gases such as ozone gas and air contained in the ozone liquid as bubbles, and the liquid storage tank 103 The ozone liquid in which ozone gas is dissolved in the liquid is stored in the lower layer of the liquid storage tank 103. The gas outlet 113 is provided at a position higher than the position of the drain 112 provided in the liquid storage tank 103 with respect to the direction of gravity, and the ozone gas that has been gas-liquid separated is discharged through the path a.

  The circulation path A is formed by a piping system composed of hoses, pipes, etc., and the path b connecting the outlet 107 of the ozone generator 101 and the inlet 109 of the gas-liquid mixing unit 102 and the gas-liquid mixing unit 102 A path c connecting between the outlet 110 and the inlet 111 of the liquid storage tank 103 and a path a connecting between the gas outlet 113 of the liquid tank 103 and the inlet 106 of the ozone generator 101 are configured. Has been. The path a includes an opening 114 provided in the middle of the path a, and is connected to a gas introduction unit 104 that controls introduction of gas from the outside to the inside of the ozone liquid generating apparatus 100.

  The gas introducing means 104 is constituted by a path d provided with a check valve 115, one of the paths d is connected in communication with an opening 114 provided in the middle of the path a, and the other is air. Alternatively, an external port 116 communicating with a gas cylinder or the like that stores oxygen or air is formed. Here, the check valve is a control valve that is attached to a pipe or the like through which a fluid such as a gas or a liquid flows to stop the flow from a certain direction to the opposite direction.

  The path provided with the check valve allows the fluid to flow only in one direction. For this reason, the path d provided with the check valve 115 causes the gas to flow only in one direction from the external port 116 to the path b, thus preventing the release of the gas from the circulation path to the outside.

  The gas introducing means 104 may be any means capable of introducing gas from the outside to the inside of the ozone liquid generating apparatus 100, and may be configured to include a check valve without connecting a pipe to the opening 114. . Further, instead of the check valve, an open / close valve that can control introduction into the ozone liquid generator 100, an electromagnetic valve that can be electronically controlled, or the like may be used.

  Further, an ozone filter 117 having a function of reducing ozone gas may be provided in the pipe d. Since the ozone filter 117 can decompose the ozone gas passing through the filter, even if the check valve 115 is corroded and damaged by the ozone gas, the ozone gas inside the ozone liquid generator 100 leaks to the external space. And the gas can be safely released from the external port 116. As the ozone filter 117, a general ozone filter such as a paper in which an ozone decomposition catalyst is configured in a lattice shape or an aluminum is attached is disposed.

  Next, the float valve as the opening / closing control means provided in the liquid storage tank 103 will be described. FIG. 2 is a view showing a liquid storage tank 103 provided with a float valve 105. The liquid storage tank 103 is provided with a float valve 105 capable of controlling the opening and closing of the gas outlet 113 according to the liquid level of the liquid storage tank 103. Here, the float valve is a valve that switches between open and closed states by using the buoyancy that an object made of a substance having a specific gravity smaller than the liquid or a hollow object floats on the liquid and moves the object floating on the liquid up and down. In general, it plays a role as a water level adjusting means for automatically adjusting the liquid level of the liquid stored in a tank or the like so as to keep it within a certain range.

  The float valve 105 is formed by a float 1051, a float guide 1052, and a float stopper 1053. The float 1051 floats on the liquid stored in the liquid storage tank 103, rises and falls according to the height of the liquid level, rises as the liquid level rises, and falls as the liquid level falls. The float plug 1053 contacts the gas outlet 113 and plays a role as a plug that closes the flow path.

  The float guide 1052 is formed in a bar shape or a flat plate shape, and one end is connected to the inner wall of the liquid storage tank 103 and the other end is connected to the float 1051. In addition, the float guide 1052 is provided with a float stopper 1053 on a part or the entire surface between the connection point between the connection point with the inner wall of the liquid storage tank 103 and the connection point with the float 1051. As the liquid level rises, the float 1051 rises, and the float plug 1053 is provided to close the gas outlet 113.

  For this reason, when the water level of the liquid stored in the liquid storage tank 103 is lower than a certain water level, the gas outlet 113 is opened and the gas is led out from the gas outlet 113, and the circulation path A shown in FIG. The gas circulates. When the liquid is stored in the liquid storage tank 103 and becomes a certain water level or higher, the gas outlet 113 is closed by the float plug 1053 and is closed, and the gas circulation in the path a shown in FIG. The gas as the raw material is sucked from the external port 116, and the gas is introduced from the path d to the path b. In this way, the float valve 105 switches the gas outlet 113 from the open state to the closed state when the liquid level stored in the liquid storage tank 103 exceeds a certain height. The liquid storage water level is kept in a certain range by preventing the outflow of the gas or liquid exceeding 1 and controlling the amount of gas in the liquid storage tank 103 within a certain range.

  FIG. 3 is a cross-sectional view showing an example of the check valve 115 according to this embodiment. The check valve 115 is provided in a path d constituting the gas introduction unit 104. The check valve 115 includes, for example, a cylindrical portion 1151, a coil 1152, and a ball 1153, and includes an introduction portion 1154 that communicates with the external port 116, and a lead-out portion 1155 that communicates with the opening port 114 provided in the middle of the route a. Is provided. The ball 1153 is installed in a state where the introduction portion 1154 is closed by the spring force of the coil 1152 indicated by an arrow X in the drawing. As the check valve 115, a diaphragm using a rubber film can be used in addition to the one using a coil as shown in the figure.

  The path provided with the check valve 115 allows the fluid to flow only in one direction. Since the gas flows only in one direction from the external port 116 to the check valve 115 side, the release of the gas from the circulation path to the outside is prevented. While the ozone liquid generator 100 is operating as ozone liquid generation, the gas circulates in the direction of the arrow shown in the circulation path A shown in FIG. 1, and the check valve 115 acts to gas from the path a to the path d. Will not flow. A valve opening pressure Y is set to the check valve 115 as a force that the lower surface of the ball 1153 receives upward. When the water level in the liquid storage tank 103 rises and the float plug 1053 closes the gas outlet 113, a downward suction pressure higher than the valve opening pressure Y is applied to the check valve 115, and the raw material gas is supplied from the external port 116. In order to inhale, check valve 115 opens. On the other hand, when the water level of the liquid storage tank 103 is lowered, the float plug 1053 is in a state of releasing the gas outlet 113, and a downward force is applied to the check valve 115 by the drainage force from the drain port 112. This downward force is determined by the water head difference applied to the drain port 112. When the valve opening pressure Y is larger than the water head difference, the check valve 115 remains closed without being opened, but when the valve opening pressure Y is smaller than the water head difference, the check valve 115 opens.

  FIG. 4 shows the gas flow when the ozone liquid generation device 100 stops generating the ozone liquid. The introduction of the liquid from the inlet 108 and the generation of ozone gas by the ozone generator 101 are all stopped, and the water flows out from the drain 112. At that time, a water head difference due to the water present at the drain port 112 occurs. Here, when the valve opening pressure Y is smaller than the water head difference, a downward force works and the check valve 115 opens. For this reason, outside air is introduced from the external port 116, flows into the liquid storage tank 103, the water level in the water storage tank 103 decreases, and the ozone gas remaining in the liquid storage tank 103 and the circulation path A is indicated by a dotted arrow in the figure. It is considered that the gas flows in the direction indicated by, is drawn in the direction of the drain port 112, and as a result, ozone gas flows out from the drain port.

  Here, if the valve opening pressure Y of the check valve 115 is set to a pressure higher than the water head difference from the water level of the ozone liquid in the liquid storage tank 103 to the actual drain port Q, the difference with the water head difference works upward. The gas does not enter from the external port 116 toward the path a, and the water level can be stopped from dropping. Thereby, it can prevent that ozone gas leaks outside with an ozone liquid.

  More preferably, the valve opening pressure Y is preferably not less than the water head difference W from the operating water level P of the float valve 105 to the actual drainage port Q of the ozone liquid generating device. Here, the operating water level of the float valve 105 is a water level at which the float plug 1053 starts to close the gas outlet 113 or opens the stopper as the amount of liquid stored in the liquid storage tank 103 changes. The water head difference becomes the largest when the float valve 105 is at the operating water level P. By setting the valve opening pressure to be equal to or higher than the water head difference W, it is possible to stop the ozone liquid from flowing out from the drain port 112. Can be kept at a high position, and ozone gas can be reliably prevented from leaking to the outside together with the ozone liquid.

  Specifically, when the P-Q height W in FIG. 4 is 50 cm, the generated water head difference is 5 kPa. Therefore, the valve opening pressure of the check valve 115 to be used should be set to 5 kPa or more. That's fine.

  As for the method for setting the valve opening pressure, in the case of the check valve 115 as shown in FIG. 3, the coil 1152 is crushed (compressed amount), the coil thickness and material are changed to have different strengths. There are ways to do it. In the case of a diaphragm using a rubber film, change to a valve with a different valve pressure. Such setting of the valve opening pressure may be performed manually, or a method of detecting the water head difference with a sensor (not shown) or the like and mechanically controlling the valve opening pressure accordingly may be used.

  In this way, by setting the valve opening pressure of the check valve based on the water head difference, in the ozone liquid generating device, after the ozone liquid generating device is stopped, ozone gas due to a drop in the water level in the liquid storage tank when draining the ozone liquid It is possible to realize an ozone liquid generator that prevents leakage of water.

  The ozone liquid production | generation apparatus which concerns on this invention can be effectively utilized for the ozone liquid production | generation apparatus used for the field | area where an ozone liquid is utilized conventionally.

DESCRIPTION OF SYMBOLS 100 Ozone liquid production | generation apparatus 101 Ozone generator 102 Gas-liquid mixing part 103 Liquid storage tank 104 Gas introduction means 105 Float valve 106,108,109,111 Inlet 107,110 Outlet 112 Drain outlet 113 Gas outlet 114 Opening opening 115 Check valve 116 External port 117 Ozone filter 1051 Float 1052 Float guide 1053 Float plug 1151 Cylindrical part 1152 Coil 1153 Ball 1154 Introducing part 1155 Deriving part

Claims (4)

Ozone generating means for generating ozone gas;
A gas-liquid mixing means for mixing the ozone gas and a liquid to generate an ozone liquid;
Gas-liquid separation means for gas-liquid separation of the ozone liquid;
An open / close control means for controlling the flow of gas derived from the gas outlet of the gas-liquid separation means according to the amount of liquid stored in the gas-liquid separation means;
In the ozone liquid generating apparatus having a check valve and provided with gas introduction means for introducing gas into the ozone liquid generating apparatus from the outside,
The check valve has a valve opening pressure,
The ozone liquid generating apparatus according to claim 1, wherein the valve opening pressure is equal to or greater than a water head difference from a water level at which ozone gas does not leak from a drain port in the gas-liquid separation means to a water level at the drain port.   2. The ozone liquid generating apparatus according to claim 1, wherein the valve opening pressure is equal to or greater than a water head difference from an operating water level of the opening / closing control means to a water level of a drain of the ozone liquid generating apparatus. The ozone liquid generating device includes a detecting unit that detects a water level of the ozone liquid;
The ozone liquid generation apparatus according to claim 1, further comprising a valve opening pressure control unit that controls a valve opening pressure of the check valve based on a water level detected by the detection unit.   The said ozone liquid production | generation apparatus is equipped with the circulation path which circulates gas among the said ozone generator, the said gas-liquid mixing means, and the said gas-liquid separation means, The Claim 1 thru | or 3 characterized by the above-mentioned. The ozone liquid generator described in 1.