JP4719937B2 - Electrode material and ozone generator - Google Patents

Description

  The present invention relates to an electrode material and an ozone generator.

It has been conventionally known that ozone (O ₃ ) has a strong oxidizing action, and its oxidizing power is used to examine its use in various applications such as sterilization, antibacterial, deodorization, decolorization, and removal of organic substances. Yes.

Ozone is generally produced by applying a high voltage to a pair of electrodes and discharging them into the air (see, for example, Non-Patent Document 1). For example, as shown in FIG. 1, a ceramic plate (insulator) is disposed between two flat metal electrodes spaced apart from each other, and a pair of flat metal electrodes are energized and discharged. Thus, oxygen molecules (O ₂ ) in the air are dissociated to generate negative ions (anions) (O ⁻ ), and then recombined with other oxygen molecules to produce ozone (O ₃ ).

  In the ozone production process, negative ions (anions) are also generated together with ozone, and the use of these negative ions (anions) for various purposes such as blood purification, blood glucose lowering, and fatigue recovery is being studied.

In particular, as interest in bird flu, nosocomial infections, and the like has increased in recent years, there has been an increasing demand for portable and indoor ozone generators as a means of preventing infectious diseases.
“Hospital Application by New Ozone Generation Method / Measurement Method”, Japanese Medical Instrumentation, No. 57, 3, 1987

  However, when the present inventors examined, when producing ozone with the apparatus shown in FIG. 1, even if a water-resistant film is provided on the outer main surface of the metal electrode, moisture in the air contacts the side surface of the metal electrode. The production efficiency of ozone decreases due to the charging and heat generation of the water, and the durability of the apparatus itself is also decreased (for example, the durability is 500 hours or less in an atmosphere of a temperature of 60 ° C. and a humidity of 90%). There was found.

  In addition, ozone is a substance with low stability and is easily decomposed by, for example, wind (forced air flow by a fan, etc.). Therefore, in order to obtain ozone at a constant concentration, high output (high voltage) Therefore, it was difficult to obtain high-concentration ozone at low output (low voltage) and at low cost.

  Under such circumstances, the present invention can stably discharge even in a high-humidity atmosphere, and can generate high-concentration ozone together with negative ions (anions) at low output (low voltage) and at low cost. The first object is to provide an electrode material and a method for producing the same.

  The second object of the present invention is to provide an ozone generator using the electrode material, and a third object is to provide an ozone generating method using the electrode material.

(1) It consists of a mesh-like member composed of a conductive linear material,
Wherein the conductive linear material, and the linear central portion of titanium, and an outer circumferential portion made of titanium oxide covering at least a portion of the linear central portion outer peripheral possess, the main surface trapezoidal the reticulated member electrode material, characterized in der Rukoto,
(2) at least a portion of the outer edge portion of the mesh-like member, the electrode material according to the configured ing in above (1) by the protrusion of the conductive linear material,
(3) including at least a discharge unit and a control unit electrically connected to the discharge unit;
The ozone generator , wherein the discharge part has a pair of electrodes, and at least one of the pair of electrodes is made of the electrode material according to (1) or (2),
(4) The pair of electrodes are arranged so that their main surfaces are opposed to each other, and an angle formed by a virtual straight line L orthogonal to the main surface of one electrode and the main surface of the other electrode is 0 ° or more and less than 90 ° The ozone generator according to (3) above, which is in a range ,
And (5) The ozone generator according to (3) or (4), wherein the ozone generator is a portable or indoor ozone generator .

  ADVANTAGE OF THE INVENTION According to this invention, the electrode material which can discharge stably also in a high humidity atmosphere, and can generate | occur | produce ozone and anion (anion) of high concentration with low output (low voltage) and low cost, and its manufacturing method Can be provided.

  Moreover, according to this invention, the ozone generator using the said electrode material and the ozone generation method can be provided.

First, the electrode material of the present invention will be described.
The electrode material of the present invention comprises a mesh-like member composed of a conductive linear material, and the conductive linear material covers at least a part of the linear center portion made of titanium and the outer periphery of the linear center portion. And an outer peripheral portion made of titanium oxide.

  The electrode material of the present invention is composed of a mesh member, and FIG. 2 shows a schematic diagram when the mesh member is viewed from the main surface side. In FIG. 2, the solid line indicates the conductive linear material constituting the mesh member, and the broken line is provided for understanding the outer shape of the mesh member.

  As shown in FIG. 2, the mesh member used in the electrode material of the present invention has a main surface shape of a square shape (FIG. 2A), a rectangular shape (FIG. 2B), a trapezoidal shape (FIG. 2 (c)) or any other shape such as a polygonal shape other than the quadrilateral shape, a circular shape, an elliptical shape, or the like, but when the main surface shape is a square shape, Also, the trapezoidal shape is preferable because the number of protruding portions of the conductive linear material described later can be increased.

  The size of the electrode material of the present invention can be appropriately selected depending on, for example, the purpose of use of an ozone generator incorporated as an electrode, the size of a space in which ozone is diffused, the required amount of generated ozone. When the main surface shape of the mesh member used for the electrode material of the present invention is trapezoidal and the electrode material is used as an electrode of a portable ozone generator, the upper base is 3 mm to 13 mm, the lower base is 4 mm to 16 mm, and the height is high. It is preferably 4 mm to 12 mm in thickness, more preferably 5 mm to 10 mm in the upper base, 6 mm to 12 mm in the lower base, and 6 mm to 10 mm in height, and 6 mm to 8 mm in the upper base, 8 mm to 10 mm in the lower base, and 8 mm in height. More preferably, it is 10 mm. The thickness of the mesh member is preferably 0.3 mm to 1 mm, more preferably 0.3 mm to 0.8 mm, and still more preferably 0.3 mm to 0.5 mm.

  The mesh member used for the electrode material of the present invention is composed of a conductive material shown by a solid line in FIG. 2, and this conductive linear material is arranged in parallel at intervals of 2 mm to 10 mm. What is arrange | positioned is preferable, and what is arrange | positioned in parallel every 2 mm-8 mm is more preferable, and what is arrange | positioned in parallel every 2 mm-5 mm is more preferable.

  If the arrangement interval of the conductive linear members is less than 2 mm, it is difficult to obtain a mesh member having a desired shape because the formability of titanium constituting the conductive linear material is poor. Moreover, when the arrangement | positioning space | interval of an electroconductive linear material exceeds 10 mm, when using as an electrode, it will become difficult to obtain ozone of desired density | concentration.

  FIG. 3 shows a partially enlarged view of the mesh member used in the electrode material of the present invention when viewed from the main surface side. As shown in the figure, the mesh 3 of the mesh-like member 2 formed of the conductive linear material 1 is usually a square shape such as a square shape (FIG. 3A) or a rhombus shape (FIG. 3B). However, it may have a polygonal shape other than a rectangular shape, a circular shape, or an elliptical shape. When the mesh shape is a circle or an ellipse, the mesh member 2 may be constituted by the conductive linear material 1 whose cross-sectional area continuously changes in the length direction.

  The mesh-like member used for the electrode material of the present invention is configured such that at least a part of the outer edge portion is constituted by the protruding portion of the conductive linear material by protruding the end portion of the conductive linear material at the outer edge portion. It is preferable that

  FIG. 4 is a schematic diagram when the electrode material of the present invention is viewed from the main surface side. FIG. 4 shows that at the outer edge portion of the mesh member 2, the end portion of the conductive linear material 1 protrudes, so that at least a part of the outer edge portion is constituted by the protruding portion 4 of the conductive linear material. Is shown. In this way, at the outer edge of the mesh member, the end in the length direction of the conductive linear material 1 is projected so as to project the needle tip. It is possible to increase the generation concentration of ozone by discharging only from this. Since the above-mentioned effect can be enhanced as the number of the projecting portions 4 of the conductive linear material increases, the mesh member is formed by the projecting portions of the conductive linear material at all of the outer edge portions. Preferably there is.

  The conductive linear material constituting the mesh member has a linear center portion made of titanium and an outer peripheral portion made of titanium oxide covering at least a part of the outer periphery of the linear center portion.

In the conductive linear material, when the constituent material of the linear central portion is titanium, the heat generation can be suppressed when the electrode material of the present invention is used as an electrode. In addition, by using titanium oxide as the constituent material of the outer peripheral portion of the conductive linear material, ozone can be stably generated when the electrode material of the present invention is used as an electrode. As titanium oxide, it is preferable to use titanium dioxide (TiO ₂ ).

FIG. 5 shows an example of a cross-sectional structure of a conductive linear material in the electrode material of the present invention.
As shown in FIGS. 5 (a) and 5 (b), the cross section of the linear central portion 5 made of titanium can include a quadrangular shape or a circular shape. Any arbitrary cross-sectional shape can be adopted. In addition, the outer peripheral portion 6 made of titanium oxide usually has a cross-sectional shape corresponding to the cross-sectional shape of the linear center portion 5, and as shown in FIGS. 5A and 5B, When the cross-sectional shape is a quadrilateral shape, the cross-sectional shape is a quadrilateral shape, and when the cross-sectional shape of the linear central portion 5 is a circular shape, the cross-sectional shape is a circular shape, but they do not necessarily have a corresponding cross-sectional shape. Further, the cross-sectional shape and cross-sectional area of the conductive linear material are preferably constant in the length direction, but these are not necessarily constant.

The thickness of the linear center portion made of titanium is preferably 0.3 mm to 1 mm, more preferably 0.3 mm to 0.8 mm, More preferably, it is 0.3 mm to 0.5 mm. Further, the thickness of the outer peripheral portion made of titanium oxide is preferably 20 μm to 300 μm, more preferably 20 μm to 200 μm, and further preferably 40 μm to 200 μm.

  The outer peripheral portion made of titanium oxide only needs to cover at least a part of the outer periphery along the length direction of the linear center portion, but covers the entire outer periphery along the length direction of the linear center portion. It is preferable that Moreover, in the electrode material of this invention, in order to ensure electroconductivity and discharge property, the titanium oxide is not coat | covered in the length direction both ends of a linear center part.

Next, the manufacturing method of the electrode material of this invention is demonstrated.
The method for producing an electrode material of the present invention is a method for producing the above-described electrode material of the present invention, wherein a mesh-like titanium member composed of a titanium linear material is adhered to titanium oxide on at least a part of its surface. The blasting process is performed with the blasting material.

As the mesh titanium member, titanium lath or the like can be used.
The blasting material used when blasting the mesh-like titanium member is one in which titanium oxide is attached to at least a part of the surface, and as such a blasting material, titanium dioxide or the like around the core made of titanium particles. Examples thereof include titanium oxide-coated titanium particles coated with titanium oxide.

  The blast material preferably has a Vickers hardness (HV) of 3000 HV or less, more preferably 2000 HV or less, and even more preferably 1000 HV or less.

  When the blast material has a particle shape, the average particle diameter is preferably 20 to 200 μm, more preferably 40 to 100 μm, and further preferably 40 to 50 μm. In the present specification, the average particle diameter means a volume average particle diameter, and the volume average particle diameter can be measured by, for example, a particle size distribution measuring instrument.

  The blasting process can be performed using an existing blasting apparatus, for example, a shot blasting apparatus that projects a projection material by the centrifugal force of an impeller made of wear-resistant alloy called an impeller, or a projection material is projected by compressed air. It can be performed using an air blast device or the like.

  The projection speed of the blast material is preferably 50 to 200 m per second, more preferably 50 to 180 m per second, and further preferably 80 to 150 m per second. What is necessary is just to set a projection distance suitably with the size of a to-be-processed object (mesh-like titanium member). The projection angle is preferably selected from about 30 ° to 120 °, more preferably selected from about 40 ° to 90 °, and still more preferably selected from about 45 ° to 65 °.

  In the method for producing an electrode material according to the present invention, a blast material having titanium oxide attached to at least a part of the surface is projected onto a mesh-like titanium member and collided so that the titanium oxide on the surface layer of the blast material is a mesh-like titanium member. It is considered that a stable film is formed by bonding to the surface layer. Further, even when a titanium lath or the like which is a mesh-like titanium member has a molding burr, the molding burr can be removed by the blasting process.

  FIG. 6A shows an enlarged view when the electrode material obtained by the blasting process is viewed from the main surface side. In the case where the protrusion is formed on at least a part of the outer edge of the mesh member 2 shown in FIG. 6A, for example, the mesh member along the broken line indicated by AA ′ in FIG. By cutting 2, it becomes possible to form the protrusion 4 as shown in FIG. In addition, the mesh member 2 can be appropriately cut so that a large number of protrusions 4 are formed. When a titanium lath having a main surface shape of a square or rectangle is used as the mesh titanium member, the cutting treatment is performed. It is preferable to process the main surface of the mesh member into a trapezoid.

Next, the ozone generator of the present invention will be described.
The ozone generator of the present invention includes at least a discharge unit and a control unit electrically connected to the discharge unit, the discharge unit has a pair of electrodes, and at least one electrode of the pair of electrodes is It consists of the electrode material of this invention, It is characterized by the above-mentioned.

  As described above, in the conventional ozone generator, moisture in the air comes into contact with the metal electrode, so that the production efficiency of ozone is reduced by charging the moisture, and the durability of the device itself is also reduced. Had problems. However, the ozone generator of the present invention uses the electrode material of the present invention, and this electrode material is composed of a specific mesh member 2 as shown in FIG. Since discharge (corona discharge) is performed only from the end in the longitudinal direction of the conductive linear material, the charge rate of moisture in the air is reduced, the ozone generation amount is increased and the durability of the device is improved. Can be made.

  In the ozone generator of the present invention, the pair of electrodes constituting the discharge part are preferably arranged in parallel at an interval of 2 mm to 6 mm, and are arranged in parallel at an interval of 2.5 mm to 4.5 mm. It is more preferable to arrange them in parallel at an interval of 3 mm to 4 mm. If the distance between the electrodes is less than 2 mm or exceeds 6 mm, it is difficult to obtain ozone having a desired concentration.

  In the ozone generator of the present invention, it is preferable that at least one of the pair of electrodes constituting the discharge part is inclined at an angle of 0 ° or more and less than 90 ° to the other electrode side. It is more preferable to incline at an angle of ˜70 °, and more preferable to incline at an angle of 3 ° to 60 °. In other words, the pair of electrodes constituting the discharge part may be installed in the attachment part so as to be parallel to each other, but the conductivity is improved by tilting at least one of the pair of electrodes toward the other electrode. It is preferable to increase the discharge efficiency from the end in the length direction of the linear material. Note that one electrode is inclined at an angle of 0 ° or more and less than 90 ° to the other electrode side, as shown in FIG. 8, two electrodes 8, 8 ′ are arranged in parallel, The angles α and α ′ between the imaginary straight line L perpendicular to the two electrodes and the electrodes 8 and 8 ′ are within the range of 0 ° or more and less than 90 °, based on the state of the electrodes viewed from the side. Means.

  In the ozone generator of the present invention, the discharge part and the control part are preferably separated by a partition made of an insulating material.

  FIG. 9 shows a cross-sectional view of the ozone generator 7 of the present invention. As shown in FIG. 9, the discharge unit 9 and the control unit 10 are separated by a partition wall 11, thereby generating heat and ignition during operation of the ozone generator. It is possible to reduce the possibility of occurrence. Examples of the insulating material constituting the partition include a fluororesin such as Teflon (trade name).

  In addition, since the ozone generator of this invention can drive stably with a low output (low voltage), it is not necessary to necessarily provide the said partition.

The ozone generator of the present invention may have a power supply unit that energizes the discharge unit 9 via the control unit 10 together with the discharge unit 9 and the control unit 10.
Examples of the power source include a commercially available battery or an external power source. The power source can be provided inside the container 12 or outside the container 12 in a state where it can be electrically connected to the control unit 10. .

The ozone generator of the present invention can generate, for example, 0.02 ppm or more of ozone and 5 million negative ions (anions) / cm ² or more under driving conditions of an output of 740 mW (voltage 3.5 V), and a low output. (Low voltage) can generate high concentrations of ozone and negative ions (anions). Further, the ozone generator of the present invention has, for example, a durability time of 10,000 hours or more under operating conditions of a temperature of 80 ° C. and a humidity of 95%, and can discharge stably even in a high humidity atmosphere.

  For this reason, compared with the conventional ozone generator, the ozone generator of this invention can be reduced in size, and can be used suitably as a portable or indoor ozone generator.

Next, the ozone generation method of the present invention will be described.
The ozone generation method of the present invention is a method of generating ozone by energizing a pair of electrodes, wherein at least one of the pair of electrodes is made of the electrode material of the present invention, and the pair of electrodes By energizing the electrode, ozone encapsulated in negative ions is generated.

  As described above, it is possible to generate high-concentration ozone and negative ions (anions) by energizing at least one electrode to a pair of electrodes made of the electrode material of the present invention.

  This is because by using the electrode material of the present invention as an electrode, a large amount of ozone and negative ions (anions) are generated, and at the same time, ozone, which is an unstable substance, is enveloped and protected by negative ions (anions). Therefore, it is considered that the decomposition is suppressed.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Example 1 (Example of production of electrode material)
As a mesh-like titanium member composed of a titanium wire material, a titanium lath having a rhombus-like mesh (PIP titanium lath manufactured by Fujiki Sales Co., Ltd., wire material spacing 3 mm, thickness 0.6 mm) is used. Using an impeller-type shot blasting device, a blasting material (with 200 μm of titanium dioxide attached to the entire surface of titanium particles with an average particle diameter of 100 μm, Vickers hardness of 1000 HV) is projected at 80 m per second from vertically above By projecting 280 g at a speed and forming a titanium dioxide film having a thickness of 20 μm, as a mesh member, a linear center portion made of titanium and an outer peripheral portion made of titanium dioxide covering the entire outer periphery of the linear center portion The thing comprised by the electroconductive linear material which has was obtained. Next, the linear material constituting the outer edge portion of the obtained mesh member is appropriately cut as shown in FIG. 6 so that the entire outer edge portion of the mesh member is constituted by the conductive linear material protruding portion. Two electrode materials were produced.
The obtained electrode material had a substantially trapezoidal shape (upper base 8.5 mm, lower base 12 mm, height 10 mm) when viewed from the main surface side.

Example 2 (Production example of ozone generator)
Using the two electrode materials obtained in Example 1 as a pair of electrodes, an ozone generator as shown in FIG. 9 was produced.

  First, the discharge electrode 9 was formed by arranging the pair of two electrodes on the attachment portion in the container 12 at an interval of 2 mm. With respect to the planar mounting portion, one electrode forms an angle of 90 ° and the other electrode forms an angle of 85 ° (α and α ′ in FIG. 8 are 90 ° and 85 °, respectively). Attached).

  Next, the power supply unit 10 is arranged so that the discharge unit 9 is separated by a partition wall 11 made of Teflon (trade name), which is a fluororesin, and the discharge unit 9 and the control unit 10 are electrically connected through the partition wall 11. Wiring to connect to was provided. Adjacent to the control unit 10, a 3.7 V battery is placed in the container 12 in an electrically connected state so that it can be used as a portable ozone generator, 66 mm wide, 98 mm high, and 27 mm thick. The ozone generator 7 was obtained.

When the obtained ozone generator 7 was driven under the condition of an output of 740 mW (voltage 3.7 V), 0.02 ppm of ozone and 5 million negative ions (anions) / cm ² could be generated. Further, when continuously operated under the operating conditions of a temperature of 80 ° C. and a humidity of 95%, the durability time was 10,000 hours or more.

  From this, the ozone generator of the present invention can discharge stably even in a high humidity atmosphere by using the electrode material of the present invention, and has a low output (low voltage) and a high concentration of ozone at low cost. And it turns out that it can generate | occur | produce a negative ion (anion). This is because, in the ozone generator of the present invention, not only the amount of ozone and negative ions (anions) produced is large, but also the generated ozone is protected by being surrounded by negative ions (anions). This is probably because it exists.

<Usage example of ozone generator>
(Usage example 1)
(1) With six subjects shown in Table 1 as subjects, changes in blood flow when the ozone generator 7 obtained in Example 2 was carried for about 8 hours per day, Judgment was made based on the subject's sense (physical condition) after 2 months.

◎：非常に効果を感じる
○：効果を感じる
△：やや効果を感じる
×：何も感じない
なお、株式会社ピーテック製、Selfy(セルフィ) ハンディ型血流観察システムを用い、上記６名の被験者がオゾン発生装置７を携帯する前と２ヶ月携帯した後の血流をそれぞれ測定したところ、いずれの被験者においても、血流の改善効果を確認することができた。

◎: I feel very effective ○: I feel the effect △: I feel a little effect ×: I don't feel anything Note that using the Selfy hand-held blood flow observation system made by P-Tech Co., Ltd. When the blood flow was measured before carrying the ozone generator 7 and after carrying it for 2 months, the improvement effect of the blood flow could be confirmed in any subject.

(Usage example 2)
6 patients with hay fever shown in Table 2 as subjects, changes in symptoms when carrying the ozone generator 7 obtained in Example 2 for about 8 hours per day, and symptoms before carrying the ozone generator 7 Observation was made by comparing the symptoms after carrying for 1 month.

（判定基準）
◎:非常に効果あり
○:効果を認める
×:効果なし
上記使用例１および使用例２より、本発明のオゾン発生装置が、血液浄化および花粉症の症状改善に効果を有するものであることが分かる。

(Criteria)
◎: Very effective ○: Recognized effect ×: No effect From the above use example 1 and use example 2, the ozone generator of the present invention is effective for blood purification and symptom improvement of hay fever. I understand.

  The electrode material of the present invention can discharge stably even in a high humidity atmosphere, and can generate high concentrations of ozone and negative ions (anions) at low output (low voltage) and at low cost. It can be suitably used for various ozone generators such as an indoor ozone generator.

It is a figure which shows the conventional ozone generator. It is a schematic diagram when the mesh member which comprises the electrode material of this invention is seen from the main surface side. It is the elements on larger scale when the mesh member which comprises the electrode material of this invention is seen from the main surface side. It is a schematic diagram when the electrode material of this invention is seen from the main surface side. In the electrode material of this invention, it is a figure which shows an example of the cross-sectional structure of the electroconductive linear material which comprises a mesh member. It is an enlarged view when the electrode material of this invention is seen from the main surface side. It is a figure which shows the effect | action of the electrode material of this invention. It is a figure explaining the inclination state of the electrode which comprises the ozone generator of this invention. It is sectional drawing of the ozone generator of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conductive wire 2 Mesh member 3 Mesh 4 Protruding part 6 Outer part 7 Ozone generator 8, 8 'Electrode 9 Discharge part 10 Control part

Claims (5)

It consists of a mesh-like member composed of conductive linear material,
Wherein the conductive linear material, and the linear central portion of titanium, and an outer circumferential portion made of titanium oxide covering at least a portion of the linear central portion outer peripheral possess, the main surface trapezoidal the reticulated member electrode material, characterized in der Rukoto. The mesh-like at least a portion of the outer edge portion of the member, the electrode material according to claim 1 ing formed of a protruding portion of the conductive linear member. Including at least a discharge unit and a control unit electrically connected to the discharge unit;
The ozone generator according to claim 1, wherein the discharge part has a pair of electrodes, and at least one of the pair of electrodes is made of the electrode material according to claim 1 . The pair of electrodes are disposed so that their main surfaces are opposed to each other, and an angle formed by a virtual straight line L orthogonal to the main surface of one electrode and the main surface of the other electrode is in a range of 0 ° or more and less than 90 °. The ozone generator according to claim 3. The ozone generator according to claim 3 or 4, wherein the ozone generator is a portable or indoor ozone generator.

Images