JP2001198574A - Device for producing ozonic water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozonic water production device capable of stably producing the ozonic water containing ozone in a high concentration for a long period of time. SOLUTION: This ozonic water production device is constituted of an outer cylinder 92 and a cylindrical laminated electrode body provided in the outer cylinder 92, and has an electrolytic cell 82 having a constitution with which ozonic water in a high concentration can generated. The cylindrical laminated electrode body has a core 94 provided at the center of the outer cylinder 92, a cylindrical anode 96 which is provided concentrically with and isolated from the core 94, a cylindrical solid polymer electrolyte diaphragm 98 provided at the outer side of the cylindrical anode 96 and a cylindrical cathode 100 provided at the outer side of the cylindrical solid polymer electrolyte diaphragm 98. An annular part 102 between the core 94 and the anode 96 functions as a flow passage for introducing source water, producing the ozonic water by electrolysis and discharging the ozonic water, and an annular part 104 between the outer cylinder 92 and the cathode 100 functions as a flow passage of drain water for discharging the generated hydrogen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ozone water producing apparatus, and more particularly to an ozone water producing apparatus capable of stably producing ozone water having a high ozone concentration for a long period of time.

[0002]

2. Description of the Related Art Ozone water is widely used as washing water and the like because of its strong sterilizing property. Conventionally, as an ozone water production apparatus for producing ozone water, a discharge type in which gas phase ozone is produced by discharging in oxygen gas or air to produce gas phase ozone, and irradiating ultraviolet rays to water. An apparatus for producing ozone water by an ultraviolet irradiation method in which oxygen dissolved in water is ozonized, an electrolysis method in which ozone obtained by electrolyzing water is dissolved in water, and the like.

In the electrolysis method, electrodes serving also as catalysts for ozone generation are superposed on both surfaces of a solid polymer electrolyte membrane (Solid Polymer Electrolyte), and a direct current is supplied between the two electrodes to electrolyze water. A method of generating ozone has attracted attention because of its high ozone generation efficiency. Here, with reference to FIG. 11, the operation of the configuration of the ozone water generation electrode using the solid polymer electrolyte membrane will be described. FIG. 11 is a cross-sectional view showing the configuration of the ozone water generating electrode body. As shown in FIG. 11, the basic structure of the ozone water generating electrode body 10 is as follows: a solid polymer electrolyte membrane 12; a positive electrode 14 in surface contact with one surface of the solid polymer electrolyte membrane 12; Negative electrode 1 in surface contact with the other surface of polymer electrolyte membrane 12
6 and lead wires 18 and 20 connected to the edges of the positive electrode 14 and the negative electrode 16 and connected to the anode and cathode of a DC power supply (not shown), respectively. Further, the ozone water generating electrode body 10 has gas-permeable supporting plates 22A and 22B made of a gas-permeable Teflon plate, for example, outside the positive electrode 14 and the negative electrode 16, respectively. From the solid polymer electrolyte membrane 12, the positive electrode 14, and the negative electrode 16
And the whole is integrally held.

[0004] The solid polymer electrolyte membrane 12 is formed of a fluorine-based cation exchange membrane having a thickness of 100 µm or more and 800 µm or less. Each of the positive electrode 14 and the negative electrode 16 is a porous electrode having an aperture ratio of 50% or more, for example, a metal net-like metal electrode. The contact layer of the positive electrode 12 in contact with the solid polymer electrolyte membrane 12 is formed of solid platinum also serving as a catalyst, while the contact layer of the negative electrode 14 in contact with the solid polymer electrolyte membrane 12 also serves as a catalyst. It is formed of a platinum electrode (noble metal). Positive electrode 14 and negative electrode 1
Between 6, a DC voltage of about 6 V to about 30 V is applied. The electrode has a metal plate with many small holes,
Alternatively, a slit-shaped through hole may be provided.

The mechanism by which ozone is generated when water is electrolyzed is not necessarily theoretically elucidated, but cations, that is, hydrogen ions, are separated from water molecules on the positive electrode 12 side by negative ions. It moves to the electrode 14 side. As a result, oxygen is generated on the positive electrode 12 side, and the negative electrode 1
Hydrogen is generated on the 4 side. When oxygen is generated on the positive electrode 12 side, it is said that if the potential difference between the positive electrode 12 and the negative electrode 14 is larger than the potential difference required for oxygen generation, ozone is generated together with oxygen. The solid polymer electrolyte membrane 12 has a function of promoting the passage of hydrogen ions from the positive electrode 12 to the negative electrode 14.

[0006] Water obtained by dissolving ozone generated by using the above-mentioned ozone water generating electrode body 10 in water is extremely clean, and has high sterilizing properties and great purifying properties. It is often used as raw water for cleaning, or as disinfecting water or cleaning water at medical sites.

Here, the configuration of a conventional ozone water producing apparatus for hand disinfection will be described with reference to FIGS. FIG. 12 is a flowchart showing the configuration of a conventional ozone water producing apparatus, FIG. 13 is a longitudinal sectional view of an electrolytic cell, and FIG. 14 is a transverse sectional view of the electrolytic cell. As shown in FIG. 12, a conventional ozone water producing apparatus 30 for manual disinfection has a water supply pipe 32 connected to a water supply source, and an ozone water generation electrode body connected to the water supply pipe 32. Cell 3 for generating ozone water
4, a water pipe 36 for sending ozone water flowing out of the electrolytic cell 34 to the outside, and a DC power supply 38 for supplying a DC current to the electrolytic cell 34. The water supply pipe 32 is opened and closed by a signal from an on-off cock valve 40, a constant flow valve 42 for maintaining a constant downstream pressure to maintain a constant water supply amount, and a thermal infrared sensor (not shown) for detecting human hands. Solenoid valve 4
4, and a water flow sensor 46 that detects when the water flows in the water supply pipe 32 when the electromagnetic valve 44 is opened and the water flows in the water supply pipe 32. The water flow sensor 46 outputs a signal indicating that the water flow has been detected to the DC power supply 38, and causes the DC power supply 38 to supply a DC current to the electrolytic cell 34.

As shown in FIG. 13, the electrolytic cell 34 includes an outer cylinder 50 and an electrolytic cell main body 52 provided in the outer cylinder 50.
An annular portion 54 is provided. The upstream end of the annular portion 54 is closed by an annular gasket 56. As shown in FIG. 14, the electrolytic cell main body 52 includes a plastic core body 58 provided at the center of the outer cylinder 50 and a cylindrical positive body provided outside the core body 58 with the intermediate cylindrical body 60 interposed therebetween. An electrode 62, a cylindrical solid polymer electrolyte membrane 64 provided in contact with the positive electrode 62 outside the positive electrode 62, and a solid polymer electrolyte membrane 64 provided in contact with the solid polymer electrolyte membrane 64 outside the solid polymer electrolyte membrane 64 And a cylindrical negative electrode 66. Positive electrode 6
As described above, the negative electrode 2 and the negative electrode 66 are formed as net-like metal plates, and lead wires 68 and 70 from the anode and the cathode of the DC power supply 38 are connected as shown in FIGS. .

The intermediate cylinder 60 has eight divided bodies 60a-6
0d (only four are shown in FIG. 14), and a straight water passage 69 extending in parallel with the longitudinal direction of the intermediate cylinder 60 is provided between the divided bodies. , Raw water and then ozone water. Raw water is introduced from the inlet 72 and enters the water channel 69, is electrolyzed while flowing downstream through the water channel 69, becomes ozone water, flows out of the outlet 74, and exits through the water pipe 36. On the other hand, the hydrogen generated by the electrolysis passes through the solid polymer electrolyte membrane 64 and the negative electrode 66 and dissolves in the ozone water staying in the annular portion 54 outside the negative electrode 66, and finally ends up with the ozone water at the outlet 74. Spill out of.

[0010]

However, the above-mentioned ozone water producing apparatus 30 has the following problems. First, the catalyst function of the contact portion of the positive electrode that comes into contact with the solid polymer electrolyte membrane is apt to be reduced in a relatively short time after starting the flow of raw water. For this reason, the ozone concentration of the ozone water decreases in a relatively short time after starting the flow of the raw water. When the ozone concentration of the ozone water decreases, the electrolytic cell is broken down,
The contact part of the positive electrode, which is in contact with the solid polymer electrolyte membrane, is replaced to restore the catalytic function. In this case, it is difficult to stably produce ozone water having a high ozone concentration for a long period of time. Second, although related to the first problem, generally, the ozone concentration of ozone water is low and the productivity of ozone water is low. In other words, the ozone concentration of the ozone water is likely to decrease after the start of the passage of the raw water, and the available time of the raw water is short. Third, when the flow of raw water is stopped, the production of ozone water is stopped, and then the flow of water is started again, the ozone concentration of the ozone water at the beginning of the start is low and the water quality is not good. That is a lot.

An object of the present invention is to provide an ozone water producing apparatus capable of producing ozone water having a high ozone concentration stably for a long period of time.

[0012]

SUMMARY OF THE INVENTION The first problem of the present inventor is that the contact portion of the positive electrode which comes into contact with the solid polymer electrolyte membrane is a catalyst which promotes electrolysis of water to generate ozone water. Although having a function, its catalytic function is caused by deterioration due to alkali metal ions such as Mg ⁺ , Ca ⁺ , alkaline earth metal ions, and other impurities contained in raw water such as tap water. It turns out. Further, the catalytic function is deteriorated by the hydrogen-containing water staying in the annular portion. As a result of repeated research, firstly, the flow path of raw water and ozone water was separated from the flow path of drain water containing hydrogen, and the generated hydrogen was quickly discharged together with the drain water. Proved to be effective. Moreover, it turned out that deterioration can be suppressed by making the flow of raw water and the flow of drain water into a swirling flow. Second, by changing the inlet of raw water, changing the electrode area for ozone generation,
It was found that deterioration of the electrode could be suppressed.

In order to solve the second problem, it is effective to control the current supplied from the DC power supply to both electrodes in conjunction with the water supply in order to stably generate high-concentration ozone water. It turned out to be. The third problem is that after stopping the supply of the raw water, it is found that the ozone concentration of the ozone water immediately after the resumption of water supply becomes low because the raw water stays in the electrolytic cell. The third problem can be solved by providing a drain port in the flow channel and the flow channel for drain water.

In order to achieve the above object, an ozone water producing apparatus according to the present invention (hereinafter referred to as a first invention) comprises a cylindrical solid polymer electrolyte membrane and a cylindrical solid polymer electrolyte membrane. A tubular laminated electrode body consisting of a cylindrical porous positive electrode and a cylindrical porous negative electrode provided opposite to and in contact with both surfaces is provided in the outer cylinder, and a direct current is supplied between the positive electrode and the negative electrode. And electrolyze water to produce ozone water
The inside of the cylindrical positive electrode is formed as a first flow path,
An annular portion between the cylindrical negative electrode and the outer cylindrical body is formed as a second flow path independent of the first flow path, and the supplied raw water is divided into two water flows by a flow dividing means. , The first water stream is introduced into the first flow path, flows out as ozone water in which ozone generated by electrolysis of raw water is dissolved,
Is characterized by being discharged as drain water containing hydrogen generated by electrolysis of raw water.

In the first invention, the ozone concentration is high because the drain water containing hydrogen generated by the electrolysis of the raw water is discharged separately from the ozone water.

In a preferred embodiment of the present invention, the first flow path and the second flow path have first and second swirling means for turning the first water flow and the second water flow, respectively, into a swirling flow. Have. As the swirling means, for example, a swirling flow can be formed by introducing the first water flow and the second water flow in a tangential direction of the electrode surfaces of the cylindrical positive electrode and the negative electrode. In addition, by providing spiral guides in the first flow path and the second flow path, a swirling flow can be formed.
More preferably, the turning directions of the first turning means and the second turning means are opposite to each other.

In a further preferred aspect of the present invention, the first flow path and the second flow path are each provided with a first port at one end and a second port at the other end in the longitudinal direction of the cylindrical laminated electrode body. A second port at the end, wherein the first water flow and the second water flow are
Each has means for varying the flow mode of entering from the first port and exiting from the second port, or conversely entering from the second port and exiting from the first port. By making the flow of the raw water and the ozone water and the flow of the drain water countercurrent, the ozone concentration of the ozone water can be increased by removing generated hydrogen from the ozone water by the drain water having a low hydrogen concentration. More preferably, the flow mode of the first water stream and the second water stream is changed periodically according to a schedule.

A third flow path which communicates the second port of the first flow path with the first port of the second flow path, when the flow of the first and second water flows is stopped. , Air is introduced from a first port of the first flow path, press-fitted from a second port to a second flow path via a third flow path, and a first flow path and a second flow path are introduced. Drains water that remains in the tank. As a result, the raw water and drain water staying in the first flow path and the second flow path can be discharged, so that at the time of restarting the next water flow, ozone water having a high ozone concentration can be discharged from the initial stage of the restart. it can.

Further, another apparatus for producing ozone water according to the present invention (hereinafter referred to as a second invention) comprises a cylindrical solid polymer electrolyte membrane and a cylindrical solid polymer electrolyte membrane in contact with both surfaces. A cylindrical laminated positive electrode body with a cylindrical porous positive electrode and a cylindrical porous negative electrode provided facing each other is provided in the outer cylinder, and a direct current is supplied between the positive electrode and the negative electrode to supply water. In an ozone production device that produces electrolyzed ozone water, a power supply control device that controls the current value of the DC current supplied from the DC power supply between the positive electrode and the negative electrode, the supply and stop of the DC current, and the water supply pipe An opening / closing valve that is opened and closed by an actuator to control start and stop of water flow to the cylindrical laminated electrode body, and that the power supply control device and the actuator are operated in accordance with a control rule that regulates the operation of the power supply control device and the actuator. With a control device It is characterized in that.

In the second invention, the electrodes are energized at the optimal timing in conjunction with the supply of the raw water, so that ozone water having a high ozone concentration is discharged from the beginning of the energization start.
In addition, the catalytic function of the electrode can be maintained at a high value for a long time.

The operation modes of the power supply control device and the actuator stipulated in the control rule are free. For example, the control rule is such that after the first predetermined time has elapsed after the opening and closing of the on-off valve,
It is stipulated that electricity is supplied between the two electrodes to generate ozone water, and the on-off valve is closed after a lapse of a second predetermined time after the supply of electricity is stopped. The first predetermined time is usually from 3 seconds to 30 seconds, and the second predetermined time is usually from 3 seconds to 10 seconds.
Seconds. By supplying electricity to the electrodes after water supply is started and supplying water even after the supply of electricity is stopped, wear of the electrodes can be prevented and the life of the electrodes can be prolonged.

Further, the control regulation is such that when current is started between the two electrodes after the first predetermined time has elapsed, the current value from the start of the current application until the third predetermined time elapses becomes the third predetermined time. It is defined to be higher than the current value after a lapse of time.
The third predetermined time is usually from 1 second to 5 seconds, and
The current value during that time is 100% to 200% of the current when the ozone water is generated. Thus, ozone water having a high ozone concentration can be discharged from the beginning of the passage of water.

In addition, the control regulation stipulates that power is supplied to both electrodes in a pulse-like cycle during power supply between the two electrodes to generate ozone water, and the power supply is stopped. Thereby, the temperature rise of the electrode due to the electric energy supplied for electrolyzing the water can be suppressed, the electrolysis can be promoted, and the wear of the electrode can be reduced.

The control regulation is such that, after stopping the current supply for the generation of the ozone water, a current value smaller than the current value when the current supply for the generation of the ozone water is stopped for a fourth predetermined time. It stipulates that the power supply be continued. The fourth predetermined time is usually 10 seconds or more, and the current value during that time is 2% to 20% of the current value during energization for generating ozone water. After the generation of ozone water is stopped, the water remaining in the vicinity of the electrode is converted into ozone water by continuing to supply current with a current value smaller than the current value when the power is supplied for generation of ozone water for the fourth predetermined time, And ozone water having a high ozone concentration can be discharged from the beginning of the next water flow and from the beginning of the water flow.

[0025]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 This embodiment is an example of an embodiment of the ozone water producing apparatus according to the first invention, and FIG. 1 is a flow sheet showing the configuration of the ozone water producing apparatus of this embodiment, FIG. 2A is a longitudinal sectional view of the electrolytic cell, and FIG. 2B is an enlarged view of “A” in FIG. 2A. FIG. 3 is a cross-sectional view of the electrolytic cell taken along line II of FIG. 2A, FIG. 4A is a cross-sectional view of the electrolytic cell taken along line II-II of FIG. b) is the line III in FIG.
FIG. 3 is a cross-sectional view of the electrolytic cell at -III. FIG.
(A) And (b) is a figure which shows the flow mode of an anode water flow and a cathode water flow, respectively. FIG. 6 is a diagram for explaining the switching of the flow path around the electrolytic cell by the switching valve.
(A) and (b) are the flow-path diagrams which show the flow path at the time of ozone water generation, and the flow path at the time of completion | finish of ozone water generation, respectively. 12 to 14 in the parts and parts shown in FIG. 1 to FIG.
Are denoted by the same reference numerals, and description thereof will be omitted.

The ozone water producing apparatus 80 of this embodiment is
In addition to the configuration of the conventional ozone water producing apparatus 30 shown in FIG.
And a drain pipe 84 for discharging drain water flowing out of the electrolytic cell 82 to the outside, and an air inflow pipe 88 connected to the drain pipe 84 through a T-type joint 86 to allow air to flow therethrough.
And The air inflow opening of the air inflow pipe 88 is provided at a position higher than the opening of the distal end of the water supply pipe 36. Air at atmospheric pressure flows into the electrolytic cell 82 through the opening, and drains out water remaining in the electrolytic cell 82 from the opening at the end of the water pipe 36. A check valve 90 is provided in the air inflow pipe 88,
Drain water is prevented from flowing out through the air inlet pipe 88. The water supply pipe 32 branches into a first water supply branch pipe 32a and a second water supply branch pipe 32b upstream of the electrolysis cell 82, and the first water supply branch pipe 32a is connected to the positive electrode of the electrolysis cell 82 as described later. Connected to the side waterway (first flow path),
The water supply branch pipe 32b is connected to the negative electrode side water channel (second flow channel) of the electrolytic cell 82.

The electrolysis cell 82 provided in the ozone water producing apparatus 80 of this embodiment is shown in FIGS. 2A and 2B and FIG.
As shown in FIG. 2, it is composed of an outer cylinder 92 and a cylindrical laminated electrode body provided in the outer cylinder 92, and is installed so that its longitudinal direction is in the direction of gravity, as shown in FIG. ing.
The laminated electrode body includes a plastic core body 94 provided at the center of the outer cylinder 92, and a cylindrical positive electrode 96 provided concentrically outside the core body 94 at a distance from the core body 94.
A cylindrical solid polymer electrolyte membrane 98 provided outside of the positive electrode 96 in contact with the positive electrode 96; and a cylinder provided outside of the solid polymer electrolyte membrane 98 and in contact with the solid polymer electrolyte membrane 98. And a negative electrode 100 in the shape of a circle. Positive electrode 96
The negative electrode 100 is formed as a net-like metal plate similarly to the conventional electrolytic cell main body 52. And FIG.
As shown in (a), the conducting wires 68 and 70 from the anode and the cathode of the DC power supply 38 are connected to the positive electrode 96 and the negative electrode 100 via terminals 68a and 70a.

Annular portion 1 between core body 94 and positive electrode 96
02 functions as a flow path (first flow path) for introducing raw water, performing electrolysis and generating and flowing out ozone water. The annular portion 104 between the outer cylinder 92 and the negative electrode 100 is
Drain water flow path for discharging generated hydrogen (second flow path)
Function as At both ends of the annular portion 104, an annular portion 10 is provided.
An annular gasket 105 for closing 4 is attached.

The electrolytic cell 82 includes an inlet nozzle 106 connected to the first water supply branch pipe 32a, an outlet nozzle 108 connected to the water supply pipe 36, and, as shown in FIG. Are provided with a first switching valve 109 for switching between the two. Further, in the present embodiment, the raw water flowing from the inlet nozzle 106 is
As shown in FIG. 2 (b), a spiral groove 94a having a rectangular cross section or a V-shaped cross section is provided on the cylindrical wall of the core body 94 so as to reach the outlet nozzle 108 while flowing in a swirling flow in the inside 2. ing.

The electrolytic cell 82 has an inlet nozzle 106
The second water supply branch pipe 32b through which the raw water flows into the annular portion 104 is branched via a branch nozzle 107 provided in the annular portion 104, and as shown in FIG.
And an outlet nozzle 112 connected to the drain pipe 84 at the outlet of the annular portion 104. As shown in FIGS. 4A and 4B, the inlet nozzle 110 and the outlet nozzle 112 are eccentric from the center of the outer cylinder 92 so that the raw water and then the drain water flow through the annular portion 104 in a swirling flow. It is attached to the outer cylinder 92 in a tangential direction.

In this embodiment, as will be described later, when the operation for generating ozone water is completed, the electrolytic cell 8
2 is drained. Therefore, in order to drain raw water and ozone water in the inlet nozzle 106, the annular portion 102, and the outlet nozzle 108, the electrolytic cell 82 is connected to the auxiliary nozzle 113 connected to the outlet nozzle 112 via the above-described second switching valve 111. Is provided in the outlet nozzle 108.

As shown in FIG. 6, the first switching valve 109 switches between the inlet nozzle 106 and the outlet nozzle 108, and the second switching valve 111 switches between the branch nozzle 107, the inlet nozzle 110, and the outlet nozzle 112. , And the auxiliary nozzle 113 can be switched with each other.
FIG. 6 is an upper view and a lower view, respectively, showing a flow path switching mode of the switching valve at the time of ozone water generation and at the time of drainage in the electrolytic cell.

When the ozone water is generated, the first switching valve 1
09, as shown in FIG. 7A, the raw water flows into the electrolytic cell 82 from the first water supply branch pipe 32a through the inlet nozzle 106, passes through the annular portion 102, becomes ozone water, and becomes the outlet nozzle 1
The flow path is configured so as to flow out of the water supply pipe 36 from the pipe 08. On the other hand, as shown in FIG. 7A, the second switching valve 111 allows the raw water to flow from the branch nozzle 107 to the second water supply branch 32.
The flow path is configured so that the liquid enters the inlet nozzle 110 through the b, becomes the drain water through the annular portion 104, and flows out of the outlet nozzle 112 to the drain pipe 84. The auxiliary nozzle 113
Is closed.

With the above configuration, in this embodiment, when the ozone water is generated, as shown in FIG.
(Hereinafter, referred to as anode water flow) and the annular portion 10
The water flow (hereinafter, referred to as a cathode water flow) flowing through 4 is the clockwise direction in which the turning direction is the same. Also, the anode water flow and the cathode water flow are countercurrent to each other, that is, the anode water flow flows from the top to the bottom of the electrolytic cell 82, and the cathode water flow flows in the opposite direction from the bottom to the top. Since the hydrogen thus removed can be almost completely removed, ozone water having a high ozone concentration can be obtained.

When the generation of the ozone water is completed, the first switching valve 109 causes the raw water to flow into the electrolytic cell 82 from the first water supply branch pipe 32a through the outlet nozzle 108, as shown in FIG. The flow path is formed so as to flow out to the water supply pipe 36 through 108. However, the raw water does not actually flow in due to the closing of the solenoid valve 42. On the other hand, as shown in FIG. 7B, the second switching valve 111
13, through the outlet nozzle 112 and into the annular portion 104,
The flow path is configured to flow out of the inlet nozzle 110 to the water pipe 36. Note that the branch nozzle 107 is in a closed state.

After the generation of the ozone water is completed, the electrolytic cell 8
At the time of the drainage of 2, the flow of the raw water is stopped, and then, as shown in FIG.
Through the joint 86 and the drain pipe 84, the outlet nozzle 112
From the inlet nozzle 110, through the switching valve 111, through the branch nozzle 107, through the annular portion 102, and into the water pipe 3.
Drain from 6. Further, the air flows into the annular portion 104 from the outlet nozzle 112 through the T-joint 86 and the drainage pipe 84 from the air inlet pipe 88, and further flows from the inlet nozzle 110 via the switching valve 111 to the branch nozzle 107 from the inlet nozzle 1.
The water in the inlet nozzle 106, the annular portion 102, and the outlet nozzle 108 is caused to flow out of the water supply pipe 36 while the air is flowing into the tube 06. That is, when the electrolytic cell 82 is drained, air is sent by atmospheric pressure or a pump in a flow path opposite to the drain water drain flow path.

As a modification of this embodiment, the annular portion 10
2 as the outlet nozzle, and the outlet nozzle 1
08 as the inlet nozzle and the inlet nozzle 110 and the outlet nozzle 112 of the annular portion 104 as the inlet nozzle and the outlet nozzle, respectively.
As shown in (a), the anodic water flow and the cathodic water flow are clockwise in the same turning direction, and the flow directions are opposite. Although not shown, a spiral guide plate may be provided in the annular portion 104 as another swirling means for causing the cathode water flow to flow in the annular portion 104 as a swirling flow.

Further, as another modification of the first embodiment, as shown in FIGS. 15, 16 and 17, the first water supply branch pipe 3 is provided so that raw water flows in the annular portion 102 in a swirling flow.
As shown in FIG. 17, the inlet nozzle 106 connected to 2a and the outlet nozzle 108 connected to the water pipe 36 are
It may be attached to the outer cylinder 92 in a tangential direction at a position eccentric from the center of the outer cylinder 92. In this modification, similarly to the first embodiment, the drain water is connected to the inlet nozzle 110 connected to the second water supply branch pipe 32b and the drain pipe 84 so that the drain water flows in the annular portion 104 in a swirling flow. Outlet nozzle 11
As shown in FIG. 16, 2 is tangentially attached to the outer cylinder 92 at a position eccentric from the center of the outer cylinder 92.

Modification Example 1 of Embodiment 1 In this modification example, the inlet nozzle 106 and the outlet nozzle 108 of the annular portion 102 are arranged such that the turning direction of the anode water flow and the turning direction of the cathode water flow are reversed. And the annular portion 10
Four inlet nozzles 110 and outlet nozzles 112 are provided. Thereby, in the first modification, as shown in FIG. 5C, the anode water flow and the cathode water flow have one of the turning directions in the clockwise direction and the other in the counterclockwise direction,
And the flow direction is the same direction from the top to the bottom of the electrolytic cell 82 or from the left to the right. Further, by switching the inlet nozzle and the outlet nozzle to each other, as shown in FIG. 5 (c), the turning directions of the anode water flow and the cathode water flow are such that one is clockwise and the other is counterclockwise. And the flow direction is reversed.

Modified Example 2 of Embodiment 1 In this modified example, the inlet and outlet nozzles of the anode water flow and the cathode water flow are periodically switched so that the anode water flow and the cathode water flow are changed from FIG. 4), flow in different manners. The switching of the inlet nozzle and the outlet nozzle of the anode water flow and the cathode water flow is performed in advance so as to satisfy the four aspects, the first water supply branch pipe 32a, the second water supply branch pipe 32b, and the water supply pipe 36 each having an electromagnetic valve. ,
And the drain pipe 38 is connected to the inlet nozzle and the outlet nozzle of the anode water flow and the cathode water flow, and as shown in FIG. 7, these electromagnetic valves are opened and closed. Note that a sequence control device is provided for opening and closing the solenoid valve. In Modification Example 2, when the electrolytic cell 82 whose catalytic function has been reduced from 10% to 20% of the initial value is disassembled and subjected to a catalyst recovery treatment, when assembled and reused, 9%
The electrolytic cell 82 that has recovered to the 0% catalytic function can be maintained at the 50% catalytic function for a long period of time.
Incidentally, the combination of the flow mode of the anode water flow and the cathode water flow,
As shown in Table 1, there are 16 modes.

[Table 1]

Embodiment 2 This embodiment is an example of the embodiment of the ozone water producing apparatus according to the second invention, and FIG. 8 is a flow sheet showing the configuration of the ozone water producing apparatus of this embodiment. 9 (a) and 9 (b) are diagrams for explaining the relationship between the state of current supply to the electrodes and the state of water supply, and FIGS. 10 (a) and 10 (b), respectively.
FIG. 4 is a diagram for explaining another relationship between the state of current supply to the electrodes and the state of water supply. 8, parts that are the same as those shown in FIG. 1 are given the same reference numerals, and
The description is omitted. The ozone water production apparatus 120 according to the present embodiment has the same configuration as the ozone water production apparatus 80 according to the first embodiment, but also has a current value of a DC current supplied between the positive electrode and the negative electrode of the electrolytic cell 82 from the DC power supply 38. , DC current supply,
A power control device 122 for controlling the stop. After receiving the signal indicating that the raw water has been supplied from the water flow sensor 46, the power supply control device 122 controls the energization of the DC power supply 38 according to a control rule described below. Also, the solenoid valve 44
Is opened by a signal from a thermal infrared sensor (not shown) for detecting a human hand, similarly to the conventional ozone water producing apparatus 30, but the solenoid valve 44 is closed by a power supply in this embodiment. It depends on the control signal of the control device 122.

The control regulation is the first control mode shown in FIG.
As shown in (a), after the solenoid valve 44 is opened, a first predetermined time T ₁ , for example, 3 seconds, elapses, electricity is supplied between both electrodes to generate ozone water, It is defined that the electromagnetic valve 44 is closed after a lapse of a predetermined time T ₂ , for example, 5 seconds. As shown in FIG. 9B, the control regulation includes a first predetermined time T as a second control mode.
When the current is started between the two electrodes after ₁ has elapsed, the current value after the third predetermined time T ₃ , for example, 1 to 2 seconds has elapsed since the start of the current, is the current after the third predetermined time has elapsed. It is stipulated that, after the elapse of the third predetermined time, the operation shifts to an energization period for ozone generation. The current value during the third predetermined period is 15 times the current value during energization for ozone generation.
0%.

The control regulation is a third control mode shown in FIG.
As shown in FIG. 0 (a), it is stipulated that power is supplied at a pulse-like cycle during power supply between both electrodes, and power supply is stopped. As a fourth control mode, as shown in FIG. 10B, the control regulation is such that the ozone water generation is stopped for a fourth predetermined time T ₄ , for example, 30 seconds after the power supply for generating the ozone water is stopped. Is defined so that the current is continuously supplied with a current value smaller than the current value when the current is supplied. The current value during the fourth predetermined period is 10% of the current value during energization for ozone generation.

The present embodiment is different from the ozone water producing apparatus 80 of the first embodiment in which the current supply to the electrodes is not controlled.
Ozone water can be stably discharged at a constant concentration. Although the present embodiment is applied to the ozone water producing apparatus 80 of the first embodiment, the conventional ozone water producing apparatus 3
0 can also be applied.

[0045]

According to the first aspect of the present invention, the supplied raw water is divided into two streams by the dividing means, the first stream is introduced into the first flow path, and the raw water is generated by electrolysis. The ozone water is discharged as ozone water in which ozone is dissolved, and the second water stream is discharged as drain water containing hydrogen generated by electrolysis of raw water.
Since the drain water containing hydrogen generated by the electrolysis of the raw water is discharged, the ozone concentration of the ozone water is high. Second
According to the invention, since the electrodes are energized with the optimal energization mode at the optimal timing in conjunction with the supply of the raw water, the ozone water having a high ozone concentration is discharged from the beginning of the energization start, and for a long time. The electrode catalytic function can be maintained at a high value.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing a configuration of an Osong water producing apparatus according to a first embodiment.

FIG. 2 (a) is a longitudinal sectional view of an electrolytic cell, and FIG. 2 (b)
FIG. 2 is an enlarged view of “A” in FIG.

FIG. 3 is a cross-sectional view of the electrolytic cell taken along line II of FIG. 2 (a).

4 (a) is a cross-sectional view of the electrolytic cell taken along line II-II in FIG. 2 (a), and FIG. 4 (b) is a line III-III in FIG. 2 (a).
FIG. 2 is a cross-sectional view of the electrolytic cell in FIG.

FIGS. 5 (a) to 5 (d) are diagrams showing flow modes of an anode water flow and a cathode water flow, respectively.

FIG. 6 is a diagram illustrating switching of a flow path around an electrolytic cell by a switching valve.

FIGS. 7A and 7B are flow charts showing a flow path at the time of ozone water generation and a flow path at the end of ozone water generation, respectively.

FIG. 8 is a flow sheet showing a configuration of an ozone water producing apparatus according to a second embodiment.

FIGS. 9 (a) and 9 (b) are diagrams for explaining an energized state of electrodes.

FIGS. 10 (a) and (b) are diagrams illustrating another state of energization of electrodes.

FIG. 11 is a cross-sectional view illustrating a configuration of an ozone water generating electrode body.

FIG. 12 is a flowchart showing a configuration of a conventional ozone water producing apparatus.

FIG. 13 is a vertical sectional view of the electrolytic cell.

FIG. 14 is a cross-sectional view of an electrolytic cell.

FIG. 15 is a vertical sectional view of an electrolytic cell according to a modification of the first embodiment.

FIG. 16 is a cross-sectional view of the electrolytic cell taken along line II of FIG.

FIG. 17 is a cross-sectional view of the electrolytic cell taken along line II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ozone water generation electrode body 12 Solid polymer electrolyte membrane 14 Positive electrode 16 Negative electrode 18, 20 Conductive wire 22 Gas permeable support plate 30 Conventional disinfecting ozone water producing apparatus 32 Water supply pipe 34 Electrolyzer 36 Water supply pipe 38 DC power supply 40 On-off cock valve 42 Constant flow valve 44 Solenoid valve 46 Water flow sensor 50 Outer cylinder 52 Electrolysis cell main body 54 Annular part 56 Annular gasket 58 Plastic core body 60 Intermediate cylinder 62 Positive electrode 64 Solid polymer electrolyte membrane 66 Negative electrode 68, 70 Conductors 68a, 70a Terminal 72 Inlet 74 Outlet 80 Ozone water production apparatus 82 of the embodiment 82 Electrolyzer 84 Drainage pipe T-type gas-liquid separation type joint 88 Air inflow pipe 90 Check valve 92 Outer cylinder 94 Plastic core body 94a Spiral groove 96 positive electrode 98 solid polymer electrolyte membrane 100 negative electrode 102, 104 annular 106, 110 inlet nozzle 107 branches nozzles 108 and 112 exit nozzle 109 first switching valve 111 and the second switching valve 113 auxiliary nozzle 120 ozone water production apparatus 122 power supply control device of Embodiment 2

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Jun Tamura 1350 Nishioki, Kashiwazaki-shi, Kashiwazaki-shi, Niigata F-term in Kashiwazaki Silver Industrial Co., Ltd. 4D061 DB01 DB09 EB04 EB07 EB12 EB30 EB34 EB35 EB37 EB39 GA02 GA19 GC12 4K021 AA01 BA02 BC01 CA05 CA06 CA08 CA09 DB07 DB12 DB31 DB43 DB53 DC07

Claims (11)

[Claims] 1. A cylindrical solid polymer electrolyte membrane, and a cylindrical porous positive electrode and a cylindrical porous negative electrode provided opposite to and in contact with both surfaces of the cylindrical solid polymer electrolyte membrane. In an ozone production apparatus for providing ozone water by supplying a direct current between a positive electrode and a negative electrode to provide ozone water by providing a tubular laminated electrode body of Is formed as a first flow path, and an annular portion between the cylindrical negative electrode and the outer cylindrical body is formed as a second flow path independent of the first flow path. Is divided into two water streams by a dividing means, the first water stream is introduced into the first flow path, flows out as ozone water in which ozone generated by electrolysis of raw water is dissolved, and the second water stream is Characterized by being discharged as drain water containing hydrogen generated by electrolysis of ozone water Manufacturing equipment. 2. The method according to claim 1, wherein the first flow path and the second flow path include first and second swirling means for turning the first water flow and the second water flow, respectively. Claim 1
An ozone water producing apparatus according to item 1. 3. The apparatus for producing ozone water according to claim 2, wherein the turning directions of the first turning means and the second turning means are opposite to each other. 4. The first flow path and the second flow path each have a first port at one end and a second port at the other end in the longitudinal direction of the cylindrical laminated electrode body. Wherein the first water flow and the second water flow each enter the first port and exit the second port, or conversely enter the second port and exit the first port. The apparatus for producing ozone water according to any one of claims 1 to 3, further comprising means for changing the value of the ozone water. 5. The apparatus for producing ozone water according to claim 4, wherein the flow modes of the first water flow and the second water flow change periodically according to a schedule. 6. A third flow path which communicates a second port of the first flow path with a first port of the second flow path, wherein the flow of the first water flow and the second water flow is provided. At the time of stoppage, the first
Air from the second port, press-fit into the second flow path from the second port via the third flow path, and discharge water remaining in the first flow path and the second flow path. Claim 1.
An ozone water producing apparatus according to item 1. 7. A cylindrical solid polymer electrolyte membrane, and a cylindrical porous positive electrode and a cylindrical porous negative electrode provided in contact with and opposed to both surfaces of the cylindrical solid polymer electrolyte membrane. In an ozone production apparatus for providing ozone water by supplying a direct current between a positive electrode and a negative electrode to produce ozone water, a positive electrode and a negative electrode are provided from a DC power supply. A power supply control device for controlling the current value of the DC current supplied between the DC current supply and the DC current supply and stop, and provided on the water supply pipe, opened and closed by an actuator,
An on-off valve for controlling the start and stop of water flow to the cylindrical laminated electrode body, and a main control device for operating the power supply control device and the actuator in accordance with a control regulation for controlling the operation of the actuator and controlling the current supply to the electrode. An ozone water producing apparatus comprising: 8. The control regulation is such that after a first predetermined time has elapsed after the opening and closing of the on-off valve, power is supplied between the two electrodes to generate ozone water, and after the power supply is stopped, a second predetermined time has elapsed. After
The ozone water producing apparatus according to claim 7, wherein the on-off valve is closed. 9. The control regulation is such that when energization is started between the two electrodes after the first predetermined time has elapsed, the current value from the start of energization until the third predetermined time elapses becomes equal to the third predetermined time. The ozone water production apparatus according to claim 8, wherein the current value after the elapse of the time is set to be higher than the current value. 10. The control regulation is as follows: during energization between both electrodes to generate ozone water, energize both electrodes in a pulse-like cycle;
The ozone water producing apparatus according to claim 8, wherein the power supply is stopped. 11. The control regulation is as follows: after stopping the power supply for the generation of ozone water, the power supply is performed with a current value smaller than the current value when the power supply is performed for the generation of ozone water for a fourth predetermined time. 9. The ozone water producing apparatus according to claim 8, wherein the specification is made to continue.