JP2001115286A - Ozonizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozonizer with which ozonized water suppressed with the inclusion of undissolved ozone may be obtained. SOLUTION: An ozonizer element is formed by winding an anode electrode made of a platinum wire-netting, an ion exchange membrane (13) and a cathode electrode made of a wire-netting around a columnar shaft body so as to come into pressurized contact with each other and winding this anode electrode intermittently at prescribed intervals in the axial direction of the columnar shaft body or insulating the anode electrode and the cathode electrode from each other intermittently at prescribed intervals in the axial direction. This ozonizer element is housed in a cylindrical flow passage in which the water flows in such a manner that the central axis thereof faces the flow direction of the water. DC voltage is impressed between the anode electrode and the cathode electrode, by which discharge parts and non-discharge parts are eventually alternately located in the flow direction of the water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozonizer, and more particularly, to an ozonizer for obtaining ozone-dissolved water (hereinafter referred to as ozone water) by electrolyzing water.

Conventionally, as a method for obtaining ozone water, a discharge method and an electrolysis method are known. In the discharge method, oxygen gas (air may be used as a raw material) is passed through a silent discharge electric field. High-concentration ozone gas is produced, and the ozone gas is brought into contact with water to dissolve ozone in water.
However, this method has a large facility, and since high-concentration ozone gas is generated once and then dissolved in water, there is a risk of ozone gas leakage, and undissolved gas phase ozone remains in water, Since this ozone may be released into the air, it has a problem of smell of ozone and a problem of contaminating air in a place where ozone water is used with ozone.

In an electrolytic ozonizer, ozone is mixed into oxygen generated on the anode electrode side by electrolyzing water, and this ozone is directly dissolved in water during electrolysis. . Conventionally, with this electrolytic ozonizer, a thin ion exchange membrane is interposed between both electrodes for electrolysis, and when the electrolysis is made more efficient, the ozone concentration increases,
It is also known that the use of platinum having a catalytic function for the anode electrode increases the ozone generation efficiency.

It is also known that more efficient electrolysis occurs when both electrodes for electrolysis are formed in a wire mesh. Conventionally, platinum electrodes made of wire mesh are provided on both sides of a flat ion exchange membrane. An ozonizer of a system in which water flows over the anode electrode side by contacting both the electrode and the exposed surface of the ion exchange membrane is said to be the most efficient ozonizer.

[0005] ozonizer of the electrolytic Since generated ozone is immediately dissolved in water, the risk of ozone leakage is small, also has the advantage that the apparatus is also compact, with a flat plate shape, 30 cm ² or more A relatively large area is required for the ion exchange membrane, which is still large, and uniform ozone generation efficiency cannot be obtained unless the electrodes are pressed and held on the ion exchange membrane on average. Accuracy was required. That is, the conventional flat electrolytic ozonizer has a problem that requires precise machining or a special electrode material or a current collecting plate that undergoes plastic deformation in order to uniformly press the electrode against the ion exchange membrane. Was.

Further, even if this electrolytic ozonizer is used, minute air bubbles in the form of ozone are suspended and remain in the ozone water, and the ozone water immediately after being obtained has an ozone smell. There is a problem that the use in a closed space is questionable.

[0007]

SUMMARY OF THE INVENTION In view of the above problems, the present invention has a high ozone generation efficiency, is compact and easy to manufacture, and can even remove minute ozone bubbles suspended in ozone water. An object of the present invention is to provide an ozonizer that can be effectively dissolved.

[0008]

In order to achieve the above object, the present invention provides a cylindrical shaft body 11 having an anode electrode 12 made of a platinum mesh, an ion exchange membrane 13 outside the anode electrode 12, Further, a wire mesh cathode electrode 14 is wound around the outside of the ion exchange membrane 13 so as to be pressed against each other, and the anode electrode 12 is wound intermittently at a predetermined interval in the axial direction of the cylindrical shaft body 11, or The ozonizer element 10 is configured by intermittently insulating the anode electrode 12 and the cathode electrode 14 at predetermined intervals in the axial direction of the cylindrical shaft body 11,
The above-mentioned ozonizer element 10 is housed in a cylindrical flow path 20 through which water flows so that the central axis of the cylindrical shaft body 11 is oriented in the flow direction of water. In this case, a technical measure is taken in which a direct-current voltage is applied during this time so that the discharge parts and the non-discharge parts are alternately located in the flow direction of water.

Therefore, in the ozonizer of the present invention, water flowing through the cylindrical flow path 20 is electrolyzed at the portion of the ozonizer element 10 to generate hydrogen, oxygen and ozone, and ozone is easily dissolved in water. The effect of immediately dissolving in water to obtain ozone water is the same as that of a conventional flat electrolytic ozonizer.

The present invention also relates to an ozonizer element 1
Since 0 is not a conventional plane shape but a cylindrical shape,
The columnar ozonizer element 10 has a function of being compact, and has an anode electrode 12, an ion exchange membrane 13,
The cathode electrodes 14 are simply wound sequentially (fastened with a fastening band or the like if necessary. In the embodiment, a Teflon thread is wound around the outermost peripheral surface and fastened and fixed). It has a function that can be fixed.

Further, in the present invention, the discharge portion and the non-discharge portion are alternately located in the flow direction of water, so that a plurality of ozone generation portions and dissolution portions are alternately combined, so that the dissolution efficiency is improved. Has the effect of improving.

The second aspect of the present invention is directed to a method for forming a large-diameter portion 11a and a small-diameter portion 11b in the axial direction on the surfaces of the large-diameter portions 11a, 11a, 11a,. A thin spiral groove 11c extending from one end side to the other end side in the longitudinal direction of the cylindrical shaft body 11 is provided, and an anode electrode 12 is wound around a large diameter portion 11a of the cylindrical shaft body 11, and the anode electrode 12,
, An ion-exchange membrane 13 outside the ion-exchange membrane 13 and a cathode electrode 14 made of wire mesh
And the ozonizer elements 10 so that they are pressed against each other.
And the above-mentioned ozonizer element 10 is housed in a cylindrical flow path 20 through which water flows so that the center axis of the cylindrical shaft body 11 is oriented in the flow direction of water.
A technical measure is taken in which a DC voltage is applied between the negative electrode and the cathode electrode 14 so that discharge portions and non-discharge portions are alternately positioned in the flow direction of water.

Therefore, the present invention provides a large-diameter portion 11a, 11a, 1
The spiral water groove 11c is provided on the surface of 1a..., So that the water of the raw material becomes a complicated flow, and the generated ozone is immediately moved from the ozone generation location to another location, thereby improving the ozone generation efficiency. It has the effect of increasing.

Further, according to the present invention, the flow path of the raw water formed between the cylindrical shaft body 11 and the ion exchange membrane 13 is enlarged at the small diameter portion 11b to change the cross sectional area of the flow path. A complex vortex is generated to effectively dissolve ozone bubbles.

Next, according to a third aspect of the present invention, there is provided a cylindrical shaft body 1 in which large-diameter portions 11a and small-diameter portions 11b are alternately positioned in the axial direction.
Are provided on the surface of the large-diameter portions 11a, 11a, 11a,..., With a spiral thin groove 11c extending from one end side to the other end side in the longitudinal direction of the cylindrical shaft body 11. An anode electrode 12 is wound around the large diameter portion 11a, and the anode electrodes 12, 1 are wound.
An ion-exchange membrane 13 is provided outside 2, 12,..., And a metal mesh cathode electrode 14 is provided outside the ion-exchange membrane 13.
The ozonizer elements 10 are configured so as to be pressed against each other, and the outer surface of the anode electrode 12 is placed in the cylindrical flow path 2 in a cylindrical flow path 20 through which water flows through the ozonizer element 10.
0, or concentrically with the holding ring 21 of the ozonizer element 10 provided between the cathode electrode 14 and the cylindrical flow path 20 on the upstream side of the cylindrical flow path 20. A technical means for holding and storing, and applying a DC voltage between the anode electrode 12 and the cathode electrode 14 so that discharge portions and non-discharge portions are alternately positioned in the flow direction of water. It was taken.

Therefore, according to the present invention, in addition to the function of the above-mentioned "Claim 1," the amount of water crossing the wire mesh on the cathode electrode 14 side is limited, and the amount of water passing through the wire mesh on the anode electrode 12 side is limited. Since it flows across the surface direction and also flows inside the spiral concave groove 11c, it has the effect of providing a flow rate difference between the two.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical concrete embodiment of the present invention will be described. The cylindrical shaft 11 is made of Teflon resin and has a diameter of 10 mm and a length of 90 mm. 10mm wide small diameter part 11b
Is provided. The concave groove 11c is formed in a screw shape,
c provided a V-shaped groove and four strips which are a part of an equilateral triangle having a depth of about 1.5 mm. The anode electrode 12 was wound around the large diameter portion 10a with a width of 20 mm using a platinum mesh of 55 mesh. The ion-exchange membrane 13 used was a Nafion membrane (No. 450, manufactured by DuPont, having a thickness of 0.15 mm), and the cathode electrode 14 used the same platinum wire netting as the anode electrode 12. The ozonizer element 10 constructed as described above is housed in a cylindrical flow path 20 of a nylon resin pipe having a thickness of 2 mm and an outer diameter of 20 mm, and the outer periphery of the upstream end of the ozonizer element 10 and the cylindrical flow path 20 are formed.
Outer diameter 16mm, inner diameter about 11mm, width 3 between the inner circumference
A holding ring 21 made of nylon resin having a thickness of 2 mm was interposed. Each of the anode electrodes 12, 12, 12,...
Means that the leads 15a and 15b were connected to a power supply (not shown), and a DC voltage of 12 V was applied between them. When water was passed, the current flowed about 0.7 amps per cm ² of the electrode. When the amount of water flowing in the cylindrical flow path 20 is set to 1.0 liter per minute, the ozone concentration of the ozone water at the outlet is 7 to 10 ppm. The ozone concentration of water is about 5 ppm, and the amount of water is 5.0 per minute.
If it is liter, the ozone concentration of ozone water is about 2.5pp
m, and 5 ppm of the obtained ozone water did not feel the ozone odor.

[0018]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 10 denotes an ozonizer element which constitutes a main part of the ozonizer of the present invention. The ozonizer element 10 has a columnar shaft 11 at the center, and an anode electrode 12 and an ion-exchange membrane formed of a platinum mesh on the outside thereof. 13. A wire mesh cathode electrode 14 is wound so as to be pressed against each other.

Although the cylindrical shaft 11 is made of Teflon, other materials such as ceramics may be used as long as they have ozone resistance and non-conductivity. The anode electrode 12 is made of platinum wire mesh. The use of platinum in this kind of ozonizer is conventionally known, and it is said that platinum has a catalytic function to increase the efficiency of ozone generation by electrolysis.

If the anode electrode 12 is formed into a wire mesh, it is a matter of course that water passes through the wire mesh. However, if a plate or the like is superposed on both front and back surfaces and water is pumped therebetween, the water constitutes the wire mesh. The wire can also flow in the direction of the surface of the wire mesh by bypassing the curved gap of the wire (hereinafter referred to as flow in the surface direction). Since the flow in the surface direction of the wire mesh is complicatedly changed at the wire portion, the flow in this direction becomes a complicated flow, the frequency of contact with the ozone just generated is increased, and the generated ozone is immediately discharged from the generated portion. To improve the efficiency of electrolysis and ozone generation.

In the later-described electrolysis with the ion exchange membrane 13 interposed therebetween, the electrolysis near the boundary between the portion where the electrode is in contact with the ion exchange membrane 13 and the surface where the ion exchange membrane 13 is exposed occurs. It is most strongly performed and has a high ozone generation rate. The use of a wire mesh increases the number of contact boundaries between the anode electrode 12 and the ion exchange membrane.
It is said that 2 is preferably formed in a wire mesh shape.

The ion-exchange membrane 13 may be a Nafion membrane. This type of ion-exchange membrane 13 is a solid but an electrolyte, and the anode electrode 12 and the cathode electrode 14 for electrolysis are formed on both sides of the ion-exchange membrane 13. , The distance between the two can be reduced, and intense electrolysis at a low voltage becomes possible.

Further, the cathode electrode 14 is also made of a wire mesh, and the material may be a corrosion-resistant metal. However, if platinum, gold, silver, or the like is used, the ozone generation efficiency may be increased by the catalytic function. Are known. Titanium mesh plated with platinum has excellent corrosion resistance and high ozone generation efficiency, and even if used for a long period of time, platinum does not dissolve and can be handled practically equivalent to platinum. there were.

Although it has been known that the anode electrode 12, the ion-exchange membrane 13 and the cathode electrode 14 are themselves used for this kind of ozonizer, in the present invention, these are sequentially added to the above-mentioned cylindrical shaft body 11. They are wrapped and pressed against each other. The cylindrical shaft body 11 may be of a simple columnar shape, of course. However, in the illustrated example, a thin spiral groove 11c is provided on the outer surface so as to connect from one end to the other end, and water flows in the concave groove 11c. It is made to flow.

In the present invention, the anode electrode 12 is intermittently wound at a predetermined interval in the axial direction of the cylindrical shaft body 11 or the space between the anode electrode 12 and the cathode electrode 14 is formed by the shaft of the cylindrical shaft body 11. Insulated intermittently at predetermined intervals in the direction. That is, in the present invention, as described later, discharge portions and non-discharge portions are alternately positioned in the axial direction of the ozonizer element 10 (referred to as the axial direction of the cylindrical shaft body 11 in the present application). Are formed by intermittently winding the anode electrode 12 at predetermined intervals in the axial direction of the cylindrical shaft body 11. In the example of FIG. 3, the anode electrode 12 is continuously wound from one end of the cylindrical shaft body 11 to multiple ends, and insulating tapes 16 having a predetermined width are provided between the anode electrode 12 and the ion exchange membrane 13. ,
16 are interposed at predetermined intervals so that the discharge parts and the non-discharge parts are alternately positioned as in the example of FIG.

The anode electrode 12, the ion exchange membrane 13, the cathode electrode 14, and the insulating tape 16 may be formed in a cylindrical shape in advance, and these may be successively pressed on the cylindrical shaft body 11 in a slightly compressed state. What is necessary is just to prepare what was formed in a planar shape so as to wind it around the cylindrical shaft body 11, and it is good that the winding start and end portions do not overlap. Needless to say, there was no remarkable reduction in efficiency even in the case where there were actually some overlapping portions.

As described above, the anode 12, the ion exchange membrane 13, the cathode 14, and the insulating tape 1 are attached to the cylindrical shaft 11.
When the coils 6 are sequentially wound and attached, high dimensional accuracy can be easily obtained. The last wound cathode electrode 14 is spot-welded, brazed, stitched, tied, or fastened with a fastening band (not shown) at the joining both ends, or wound with a thread and fastened to open the joint. It is only necessary to prevent this.

According to the present invention, the ozonizer element 10 is housed in a cylindrical flow path 20 through which water flows so that the center axis of the cylindrical shaft body 11 is directed to the flow direction of water. A DC voltage is applied between the anode electrode 12 and the cathode electrode 14 so that the discharge portions and the non-discharge portions are alternately positioned in the direction of flow of water. The cylindrical channel 20 is made of a non-conductive material such as nylon resin, and has a water inlet 22 at one end.
a, an outlet 22b is provided at the other end, and water flowing into the cylindrical flow path 20 from the inlet 22a flows out from the outlet 22b.

Since the central axis of the cylindrical shaft body 11 of the ozonizer element 10 is directed to the flowing direction of the water, the flowing water is the same as the wire mesh anode electrode 12 and the wire mesh cathode. The wire with the electrode 14 wraps around the wire constituting the wire mesh and flows in the plane direction while changing the flow direction in a complicated manner. Therefore, gas of oxygen and ozone is generated on the anode electrode 12 side by the electrolysis of water, and these are caught in a minute vortex of water, and ozone is immediately dissolved in water to become ozone water. Oxygen gas generated at the same time as ozone has a lower solubility in water than H 2 gas (Henry's coefficient is different by 10 times). Therefore, most of the oxygen gas is suspended as undissolved bubbles in water and flows toward the outlet 22b. Become.

However, there is no doubt that ozone has high solubility, but the ozone water flowing out from the outlet 22b actually has an ozone smell, and some undissolved ozone is suspended as fine bubbles. ing. Therefore, if this undissolved ozone is reliably dissolved, it will be beneficial to improve the efficiency,
Since the amount is a small amount of less than 1 percent, the value of the improvement is not recognized in terms of efficiency. However, the release of the ozone gas to the place where the ozone water is used deteriorates the working environment and must be prevented. Inhalation of ozone gas by humans may damage the mucous membranes and the like, depending on the concentration and amount, and may be dangerous. Therefore, when using ozone water in a place with a limited hermeticity, such as a clean room or a consultation room, the entry of this slight undissolved ozone gas should be suppressed.

To suppress the mixing of the undissolved ozone gas,
In the present invention, as described above, the discharge portion and the non-discharge portion are alternately located in the axial direction of the cylindrical shaft body 11, and the ozone generation portion and the stirring portion are alternately located. That is, as the water flows, it comes into contact with ozone in the discharge section,
In the present invention, sufficient stirring is performed in the non-discharge portion, and the present invention is intended to suppress mixing of undissolved ozone by repeating the both.

On the other hand, on the cathode electrode 14 side, hydrogen gas is generated by the electrolysis and becomes bubbles and goes to the outlet 22b together with water. And water flowing on the anode electrode 12 side;
The water flowing through the cathode electrode 14 is mixed on the downstream side of the ozonizer element 10. However, it is said that gaseous phase hydrogen generated on the side of the cathode electrode 14 hardly reacts with ozone water in which ozone is dissolved.

The second aspect of the present invention relates to a method of forming a large diameter portion 11a, 11a, 11a,... Of a cylindrical shaft body 11 in which a large diameter portion 11a and a small diameter portion 11b are alternately located in the axial direction. The surface of the cylindrical shaft 11 is provided with a helical thin groove 11c extending from one end to the other end in the longitudinal direction of the cylindrical shaft 11, and the anode 12 is wound around the large diameter portion 11a of the cylindrical shaft 11, 1
The ion exchange membrane 13 is provided outside the ion exchange membrane 13, and the cathode electrode 1 made of wire mesh is provided outside the ion exchange membrane 13.
4 and the ozonizer elements 1 so that they are pressed against each other.
0 is configured.

That is, according to the present invention, as shown in FIG. 4 and FIG.
1a and the small diameter portion 11b are arranged alternately in the axial direction of the cylindrical shaft body 11. The large-diameter portion is formed as a discharge portion, and the small-diameter portion 11b locally increases the cross-sectional area of the flow passage of water to cause the generation of a vortex due to a change in the flow area, thereby increasing the mixing efficiency. It is.

The ozonizer element 10 is housed in a cylindrical flow path 20 through which water flows so that the center axis of the cylindrical shaft body 11 is oriented in the flow direction of water. And applying a DC voltage between the cathode electrode 14 and
The discharge portion and the non-discharge portion are alternately arranged in the flow direction of the water as in the first aspect.

The third aspect of the present invention relates to a method for forming large-diameter portions 11a, 11a, 11a,... Of a cylindrical shaft 11 in which large-diameter portions 11a and small-diameter portions 11b are alternately located in the axial direction. The surface of the cylindrical shaft 11 is provided with a helical thin groove 11c extending from one end to the other end in the longitudinal direction of the cylindrical shaft 11, and the anode 12 is wound around the large diameter portion 11a of the cylindrical shaft 11, 1
The ion exchange membrane 13 is provided outside the ion exchange membrane 13, and the cathode electrode 1 made of wire mesh is provided outside the ion exchange membrane 13.
4 and the ozonizer elements 1 so that they are pressed against each other.
0 is the same as in claim 2.

The present invention is directed to the present invention, in which the outer surface of the anode electrode 12 is brought into contact with the inner peripheral surface of the cylindrical flow path 20 in the cylindrical flow path 20 through which water flows through the ozonizer element 10. An ozonizer element 10 provided between the cathode electrode 14 and the cylindrical flow path 20 on the upstream side of the cylindrical flow path 20.
And is stored concentrically by the holding ring 21 of FIG.

Therefore, in the present invention, on the anode electrode 12 side, water flows in the anode electrode 12 in the surface direction, and the groove 11c is formed.
Water flows inside. On the other hand, on the cathode electrode 14 side, water flows only in the surface direction of the cathode electrode 14, and depending on the cross-sectional area of the concave groove 11c, water can flow more through the anode electrode 12 side. be able to. The efficiency can be improved by allowing more water to flow through the anode electrode 12 where ozone is generated.

[0039] The DC voltage is applied between the anode electrode 12 and the cathode electrode 14 so that the discharge part and the non-discharge part are alternately positioned in the flow direction of water. It is the same as the first and second aspects.

Incidentally, in the case of increasing the capacity of the ozonizer of the present invention, a plurality of ozonizers may be connected in parallel to the header, and in order to increase the ozone concentration, a plurality of ozonizers may be connected in series. In addition, when two specific examples illustrated in the above-mentioned “Embodiment of the Invention” are connected in series, the ozone concentration of ozone water is 10 + α (ppm) at a flow rate of 2.5 liters per minute,
Since the saturated concentration of ozone is 18 ppm at 20 ° C. and 1 atm, two to four tubes can be said to be in a practical range when they are connected in series.

[0041]

According to the present invention, as described above, a cylindrical shaft 1 is provided.
1, an anode electrode 12 made of a platinum wire mesh, an ion exchange membrane 13 outside the anode electrode 12, and a wire mesh cathode electrode 14 outside the ion exchange membrane 13 are wound so as to be pressed against each other. Since the ozonizer element 10 is configured by the above-described configuration, it is possible to provide an ozonizer that can be easily manufactured with a simple configuration with dimensional accuracy of the electrolytic unit.

Further, the present invention can provide an ozonizer capable of suppressing mixing of undissolved ozone, since discharge portions and non-discharge portions are alternately positioned. By the way, in order to investigate the effect of the present invention, a comparative test with other currently known ozone water generation methods was performed. For this test, a gas dissolution method of aerating and dissolving high-concentration ozone gas in water, a plate-type ozone water electrolysis generation method which has recently become popular, and a generation method of the present invention were selected. In the gas dissolution method, the oxygen in the air is reduced to about 90% by a PSA oxygen concentrator.
%, And about 20,000 ppm of ozone gas was generated by a creeping discharge method ceramic ozonizer, which was blown into water to generate about 5 ppm of ozone water. On the other hand, in the flat plate type ozone water electrolysis method, soft water was supplied to a platinum anode having an electrode area of 30 cm ² and an electrode using the Nafion 450 membrane to obtain about 5 ppm of ozone water. Also,
In this method, 5 pp
m of ozone water was obtained.

In order to measure the concentration of the ozone gas emitted from the ozone water of each of the above-mentioned methods, the ozone water was placed in a glass beaker having a capacity of 1 liter, and the ozone water was discharged from the surface of the water.
The inlet of the Kitagawa type gas detector tube was arranged above mm, and the gas concentration was measured by the detector tube method. As a result, in the gas dissolution method, when the water temperature is 20 ° C., the emission gas concentration is 15 to 1
7 ppm, and then 3 to 4 ppm in the flat plate type ozone water electrolysis method, and 0.1 ppm or less, which is the minimum scale of the detector tube sensitivity in the case of the present invention method, which proves the effect of the present method. is there.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional front view of an ozonizer of the present invention.

FIG. 2 is a longitudinal sectional view of an ozonizer element site.

FIG. 3 is a longitudinal sectional view of an ozonizer element portion according to another embodiment.

FIG. 4 is a longitudinal sectional view of an ozonizer element in still another embodiment.

FIG. 5 is a longitudinal sectional view of an ozonizer element in still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ozonizer element 11 Cylindrical shaft 11a Concave groove 11b Concave groove 12 Anode electrode 13 Ion exchange membrane 14 Cathode electrode 20 Cylindrical flow path 21 Holding ring

Claims (3)

[Claims] 1. An anode electrode (12) composed of a platinum wire mesh on a cylindrical shaft (11), an ion exchange membrane (13) outside the anode electrode (12), and an ion exchange membrane (1).
A cathode electrode (14) made of a wire mesh is wound around the outside of (3) so that they are pressed against each other, and the anode electrode (12) is wound intermittently at a predetermined interval in the axial direction of the cylindrical shaft (11). An intermittent insulation between the anode electrode (12) and the cathode electrode (14) in the axial direction of the cylindrical shaft body (11) at a predetermined interval to form an ozonizer element (10); 10) is accommodated in a cylindrical flow path (20) through which water flows so that the central axis of the cylindrical shaft body (11) is directed to the flow direction of water, and is connected to the anode electrode (12). An ozonizer in which a DC voltage is applied between the cathode electrode (14) and a discharge part and a non-discharge part are alternately positioned in a flowing direction of water. 2. A large diameter portion (11a) and a small diameter portion (1) in an axial direction.
1b) on the surface of the large-diameter portion (11a, 11a, 11a...) Of the cylindrical shaft body (11) alternately positioned from one end side to the other end side in the longitudinal direction of the cylindrical shaft body (11). A spiral concave groove (11c) is provided, and an anode electrode (12) is wound around a large-diameter portion 11a of the cylindrical shaft body (11), and the outside of the anode electrode (12, 12, 12,...) An ozonizer element (10) is formed so that the ion-exchange membrane (13) and the cathode electrode (14) made of wire mesh are pressed against the outside of the ion-exchange membrane (13). ) Is accommodated in a cylindrical flow path (20) through which water flows so that the central axis of the cylindrical shaft body (11) faces the flow direction of water, and the anode electrode (12) and the cathode are accommodated. A direct current voltage is applied between the electrode (14) and the discharge part in the direction of flow of water and non-discharge Ozonizer with alternate parts. 3. A large-diameter portion (11a) and a small-diameter portion (1) in an axial direction.
1b) on the surface of the large-diameter portion (11a, 11a, 11a...) Of the cylindrical shaft body (11) alternately positioned from one end side to the other end side in the longitudinal direction of the cylindrical shaft body (11). A spiral concave groove (11c) is provided, and an anode electrode (12) is wound around a large-diameter portion 11a of the cylindrical shaft body (11), and the outside of the anode electrode (12, 12, 12,...) An ozonizer element (10) is formed so that the ion-exchange membrane (13) and the cathode electrode (14) made of wire mesh are pressed against the outside of the ion-exchange membrane (13). ), The outer surface of the anode electrode (12) is brought into contact with the inner peripheral surface of the cylindrical channel (20) in the cylindrical channel (20) through which water flows, or the cathode electrode (14) ) And a cylindrical flow path (20), provided at an upstream side of the cylindrical flow path (20). The element (1
0) is concentrically held and stored by a holding ring (21), and a direct current voltage is applied between the anode electrode (12) and the cathode electrode (14), so that the discharge part is connected to the discharge part in the flow direction of water. Ozonizer with non-discharge parts alternately positioned.