JP2011139850A - Air cleaning device and air cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaning device which is made to be thin in a direction of a flow passage and employs an electrical discharging type photocatalytic system with a reduced pressure loss and an air cleaning method using the air cleaning device. <P>SOLUTION: The air cleaning device 1 is equipped with: a photocatalyst-ozone decomposition catalyst module 10 which is disposed in the flow passage 60 where air flows and has a photocatalyst functioning part 11 formed in an upstream part of a base body, that ventilates air and is integrally molded, for performing a photocatalytic reaction and an ozone decomposition functioning part 12 formed in a downstream part of the base body for performing an ozone decomposition reaction; a first electrode 20 disposed to face the photocatalyst functioning part 11 of the module 10; and a power source part 50 for applying a voltage between the first electrode 20 and the base body of the module 10. The base body 14 of the module 10 has electrical conductivity. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a deodorization technique for deodorizing air by adsorbing and decomposing malodorous components contained in the air using a discharge, a photocatalyst, and an ozone decomposition catalyst. Specifically, the present invention is activated by irradiating discharge light. The present invention relates to an air cleaning apparatus and an air cleaning method for purifying, deodorizing, and sterilizing an organic chemical substance contained in air by the action of a converted photocatalyst, ozone, and oxygen radicals.

  Conventionally, as an air cleaning device for deodorizing organic chemical substances such as ammonia and formaldehyde in the air, a device of the type that adsorbs and removes using an adsorbent such as activated carbon has been the mainstream.

  However, since the deodorizing effect of an air cleaning device that removes by adsorption decreases due to adsorption saturation of the organic chemical substance on the adsorbent, the adsorbent needs to be replaced. For this reason, the air purifying apparatus that performs adsorption removal has problems that maintenance is complicated due to replacement of the adsorbent and the replacement cost of the adsorbent is high.

  In contrast, in recent years, discharge is generated using discharge electrodes, photocatalysts are activated by ultraviolet light generated at that time, and organic chemical substances such as ammonia and formaldehyde in the air are oxidatively decomposed to clean the air. 2. Description of the Related Art Discharged photocatalytic air cleaning devices that perform deodorization or deodorization are known.

  For example, Patent Document 1 (Japanese Patent Laid-Open No. 2003-310731) discloses an air cleaning device 70 as shown in FIG. 14 as a discharge photocatalytic air cleaning device. The air cleaning device 70 includes a photocatalyst module 71 provided in the flow path 80, an ozone decomposition catalyst module 75 provided in the rear stage of the photocatalyst module 71 in the flow path 80, and an upstream of the photocatalyst module 71 in the flow path. A high-voltage electrode 72 and a ground electrode 73 disposed on the side and the downstream side, respectively, and a high-voltage power source 74 for applying a high voltage between the high-voltage electrode 72 and the ground electrode 73 via conductors 76 and 77.

  The air cleaning device 70 decomposes and removes organic chemical substances into innocuous substances by actions such as photocatalytic reaction, oxidation with ozone, and oxidation with oxygen radicals having high chemical activity generated during the decomposition of ozone.

  According to the air cleaning device 70, unlike the air cleaning device of the type that removes by adsorption, it is not necessary to replace the adsorbent, thereby reducing the labor and cost of maintenance.

Japanese Patent Laid-Open No. 2003-310731

  However, since the air cleaning device 70 has two modules, the photocatalyst module 71 and the ozone decomposition catalyst module 75, arranged in series, a large amount of installation space is required for installation in the channel of the module. . For this reason, the air cleaning device 70 has a problem that the entire device becomes longer in the flow path direction.

  The air cleaning device 70 is provided with a high-voltage electrode 72 and a ground electrode 73 so as to sandwich the photocatalyst module 71. The high-voltage electrode 72 and the ground electrode 73 have a gas-permeable structure such as a three-dimensional network structure, but the pressure loss is large because two electrodes are arranged in series in the gas-permeable direction. For this reason, the air cleaning device 70 has a problem that the pressure loss increases when air is flowed into the flow path.

  The present invention has been made in view of the above circumstances, and provides a discharge-type photocatalytic air purifying apparatus in which the apparatus is thinned in the flow path direction and has a small pressure loss, and an air purifying method using the air purifying apparatus. The purpose is to do.

  The air purifying apparatus according to the present invention solves the above-described problems, and is a photocatalyst that is disposed in a flow path through which air flows and that performs a photocatalytic reaction on an upstream portion of an integrally formed substrate that can be vented. A photocatalyst-ozone decomposition catalyst module in which a functional part is formed and an ozone decomposition function part that performs an ozonolysis reaction on the downstream portion of the base is formed, and a photocatalyst function part of the photocatalyst-ozone decomposition catalyst module A first electrode disposed opposite to the first electrode; and a power source for applying a voltage between the first electrode and the base of the photocatalyst-ozone decomposition catalyst module; Is characterized by having electrical conductivity.

  In addition, the air purifier according to the present invention solves the above-described problems, and is arranged in a flow path through which air flows, and performs a photocatalytic reaction on an upstream side portion of an integrally formed substrate that can be vented. A photocatalyst-ozone decomposition catalyst module having a photocatalyst function portion to be formed and an ozone decomposition function portion for performing an ozonolysis reaction in a downstream portion of the substrate, a first electrode, and the first electrode A discharge light generating electrode unit disposed opposite to the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module, and a discharge light generating electrode unit A power supply unit that applies a voltage between the first electrode and the second electrode is provided.

  Furthermore, the air cleaning method according to the present invention solves the above-described problems, and is arranged in a flow path through which air flows, and performs a photocatalytic reaction on an upstream side portion of an integrally formed substrate that can be vented. The photocatalyst-ozone is provided using a photocatalyst-ozone decomposing catalyst module having a photocatalyst-ozone decomposition catalyst module formed with an ozone decomposing function unit formed on the downstream portion of the substrate. While irradiating the photocatalyst function part of the decomposition catalyst module with discharge light, the photocatalyst-ozone decomposition catalyst module is supplied with air from the photocatalyst function part side and discharged from the ozone decomposition function part side.

  According to the air cleaning device of the present invention, a discharge photocatalytic air cleaning device that is thin in the flow path direction and has a small pressure loss can be obtained.

  According to the air cleaning method of the present invention, air can be cleaned using a discharge photocatalytic air cleaning apparatus that is thin in the flow path direction and has a small pressure loss.

Sectional drawing of 1st Embodiment of the air purifying apparatus which concerns on this invention. The perspective view of the photocatalyst-ozone decomposition catalyst module used for the air purifying apparatus shown in FIG. The enlarged view of the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module shown in FIG. The enlarged view of the ozonolysis functional part of the photocatalyst-ozone decomposition catalyst module shown in FIG. Sectional drawing of 2nd Embodiment of the air purifying apparatus which concerns on this invention. The perspective view of the photocatalyst-ozone decomposition catalyst module used for the air purifying apparatus shown in FIG. The enlarged view of the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module shown in FIG. The enlarged view of the ozonolysis functional part of the photocatalyst-ozone decomposition catalyst module shown in FIG. Sectional drawing of 3rd Embodiment of the air purifying apparatus which concerns on this invention. The enlarged view of the other form of the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module shown in FIG. The enlarged view of the further another form of the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module shown in FIG. The enlarged view of the other form of the ozonolysis functional part of the photocatalyst-ozone decomposition catalyst module shown in FIG. The enlarged view of the further another form of the ozonolysis functional part of the photocatalyst-ozone decomposition catalyst module shown in FIG. Sectional drawing of the conventional air purifying apparatus.

  Embodiments of an air cleaning device according to the present invention will be described below with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a cross-sectional view of a first embodiment of an air cleaning device according to the present invention.

  An air cleaning device 1 shown in FIG. 1 is a discharge-type photocatalytic air cleaning device, and includes a photocatalyst-ozone decomposition catalyst module 10 disposed in a flow path 60 through which air flows, and a photocatalyst-ozone decomposition catalyst module 10. A first electrode 20 disposed to face the photocatalytic function unit 11 and a power supply unit 50 that applies a voltage between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10 are provided.

  The air cleaning device 1 is provided with a fan (not shown) that circulates air in the flow path 60 in the directions of arrows 65 and 66 in FIG.

  The air cleaning device 1 removes organic chemical substances contained in the air in the flow path 60 by oxidative decomposition or the like.

  Although it does not specifically limit as an organic chemical substance used by this invention, For example, ammonia, formaldehyde, etc. are mentioned.

(Photocatalyst-ozone decomposition catalyst module)
FIG. 2 is a perspective view of the photocatalyst-ozone decomposition catalyst module 10 used in the air cleaning device 1 shown in FIG. FIG. 3 is an enlarged view of the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 shown in FIG. FIG. 4 is an enlarged view of the ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10 shown in FIG.

  As shown in FIGS. 2 to 4, the photocatalyst-ozone decomposition catalyst module 10 uses a breathable substrate 14, and a photocatalyst function unit 11 is formed in the upstream portion of the substrate 14, and the downstream portion. The ozonolysis function part 12 is formed.

  Here, the upstream portion means a portion of the photocatalyst-ozone decomposition catalyst module 10 on the first electrode 20 side. Further, the downstream portion means a portion of the photocatalyst-ozone decomposition catalyst module 10 on the side opposite to the first electrode 20.

  The photocatalytic function unit 11 is a part of the photocatalyst-ozone decomposition catalyst module 10 in which a photocatalytic reaction unit 15 that performs a photocatalytic reaction is formed on the surface of the substrate 14 directly or indirectly through another configuration. means.

  The ozone decomposing function unit 12 is formed in the photocatalyst-ozone decomposing catalyst module 10 by an ozone decomposing catalyst reaction unit 17 that performs an ozone decomposing reaction directly or indirectly through another structure on the surface of the substrate 14. Means the part that was made.

  In the photocatalyst-ozone decomposition catalyst module 10, the photocatalyst function unit 11 and the ozone decomposition function unit 12 are continuously formed on the same base 14. For this reason, the photocatalyst-ozone decomposition catalyst module 10 consists of two parts, the photocatalyst function part 11 and the ozone decomposition function part 12, and has substantially no part exposed by the substrate 14 alone.

  The photocatalyst-ozone decomposition catalyst module 10 is disposed in a flow path 60 through which air flows.

<Substrate>
The substrate 14 used in the photocatalyst-ozone decomposition catalyst module 10 is a member having an air-permeable gap and electrical conductivity, and is integrally formed throughout the photocatalyst-ozone decomposition catalyst module 10.

  As the substrate 14, for example, a honeycomb structure made of an electrically conductive material is used. The cross-sectional shape of the flow path of the cells of the honeycomb structure is not particularly limited, and examples thereof include a hexagon, a quadrangle, and a triangle.

  A honeycomb structure is preferably used as the substrate 14 because the surface area is large and the pressure loss is small.

  Examples of the material of the substrate 14 used in the photocatalyst-ozone decomposition catalyst module 10 include metals having electrical conductivity such as aluminum, copper, silver, stainless steel, and magnesium.

  Since the base 14 used in the photocatalyst-ozone decomposition catalyst module 10 has electrical conductivity, the photocatalyst-ozone decomposition is performed by connecting the base 14 of the photocatalyst-ozone decomposition catalyst module 10 to the power supply unit 50 through the conductor 52. The catalyst module 10 can be used as an electrode.

  For this reason, the air purifying apparatus 1 shown in FIG. 1 uses the first electrode 20 connected to the power supply unit 50 through the conducting wire 51 as a high-voltage electrode, and the photocatalyst-ozone connected to the power supply unit 50 through the conducting wire 52. By using the decomposition catalyst module 10 as a ground electrode, it is possible to discharge between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10.

  The photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 generates a photocatalytic reaction by this discharge light.

<Photocatalyst function unit>
As shown in FIG. 3, the photocatalytic function unit 11 includes a base 14 and a photocatalytic reaction part 15 formed by supporting a photocatalyst on the surface of the base 14.

Examples of the photocatalyst used for forming the photocatalytic reaction unit 15 include titanium oxide TiO ₂ , yttrium oxide, tin oxide, zinc oxide, and tungsten oxide, and platinum, palladium, rhodium, and the like. Among these, titanium oxide TiO ₂ is preferable because it has high photocatalytic activity with respect to light having a wavelength of 300 nm to 400 nm, which is general discharge light obtained by applying a high voltage.

  The photocatalyst used for forming the photocatalytic reaction part 15 is preferably in the form of particles because the surface area becomes large when supported on the surface of the substrate 14.

  The particle size of the particulate photocatalyst is not particularly limited, but is usually 1 nm to 100 nm, preferably 5 nm to 40 nm. When the particle size is within this range, the specific surface area of the photocatalytic reaction portion 15 is preferably increased.

  The photocatalytic reaction part 15 is formed by carrying the photocatalyst on the surface of the substrate 14 by a known method.

  The photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 generates a photocatalytic reaction by the discharge light generated between the first electrode 20 and the second electrode 22.

  Specifically, when a photocatalytic reaction is caused in the photocatalytic function unit 11 in a state where air is circulated in the flow path 60, hydroxy radicals (.OH) are generated from oxygen in the air. When an organic chemical substance is contained in the air in the channel 60, the hydroxy radical (.OH) oxidizes and decomposes the organic chemical substance. Thereby, the air discharged from the photocatalytic function unit 11 has a reduced concentration of organic chemical substances.

<Ozone decomposition function unit>
As shown in FIG. 4, the ozonolysis function unit 12 includes a base 14 and an ozone decomposition catalyst reaction part 17 formed by supporting an ozone decomposition catalyst on the surface of the base 14.

  Examples of the ozone decomposition catalyst used for forming the ozone decomposition catalyst reaction portion 17 include at least one of Mn, Cu or Ni oxide, porous carbon containing Ni, Co, Mn or Cu, zeolite, and clay mineral. An ozonolysis substance consisting of two is used.

  The ozone decomposition catalyst used for forming the ozone decomposition catalyst reaction portion 17 is preferably in the form of particles because the surface area becomes large when supported on the surface of the substrate 14.

  The particle size of the particulate ozone decomposition catalyst is not particularly limited, but is usually 1 nm to 100 nm, preferably 5 nm to 40 nm. When the particle size is within this range, the specific surface area of the ozone decomposition catalyst reaction part 17 is increased, which is preferable.

  The ozone decomposition catalyst reaction unit 17 is formed by supporting the ozone decomposition catalyst on the surface of the substrate 14 by a known method.

  The ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10 decomposes ozone contained in the air in the flow path 60 and generates oxygen radicals with high chemical activity when ozone is decomposed. When an organic chemical substance is contained in the air in the flow path 60, oxygen radicals oxidize and decompose the organic chemical substance. Thereby, the density | concentration of an organic chemical substance decreases in the air discharged | emitted from the ozone decomposition function part 12. FIG.

(First electrode)
The first electrode 20 is an electrode through which air can be vented and is disposed to face the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10. The first electrode 20 is an electrode capable of generating discharge light with the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10.

  As the first electrode 20, for example, a mesh-like, lattice-like, or columnar electrode made of a conductive material is used.

  The first electrode 20 is connected to the power supply unit 50 so as to become a high-voltage electrode during discharge between the first electrode 20 and the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10.

  Specifically, the first electrode 20 is connected to a terminal on the high voltage side of the power supply unit 50 via a conducting wire 51.

(Power supply part)
The power supply unit 50 applies a voltage between the first electrode 20 and the base 14 of the photocatalyst-ozone decomposition catalyst module 10 via the conductive wires 51 and 52.

  As the power supply unit 50, one that can generate discharge light by applying a high voltage between the first electrode 20 and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is used. As the power supply unit 50, for example, a high frequency high voltage power supply, a high voltage pulse generation circuit, a high voltage DC power supply, or the like is used.

  The power supply unit 50 is connected to the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10 so that the first electrode 20 becomes a high-voltage electrode and the photocatalyst-ozone decomposition catalyst module 10 becomes a ground electrode during discharge. Connected.

  When a voltage is applied between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10 by the power supply unit 50, between the first electrode 20 and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10. The discharge light is generated in the.

  As the discharge light generated between the first electrode 20 and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10, the photocatalyst carried on the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 performs a photocatalytic reaction. The one with the wavelength to raise is used. Specifically, ultraviolet light having a wavelength of 10 nm to 400 nm is used as the discharge light.

  When discharge light is generated between the first electrode 20 and the photocatalyst function unit 11 of the ozone decomposition catalyst module 10, the photocatalyst carried on the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is photocatalyzed by the discharge light. In addition, a part of the air in the flow path 60 is oxidized to generate ozone.

(Function)
The operation of the air cleaning device 1 will be described with reference to FIG.

  First, air containing an organic chemical substance is supplied into the flow path 60 of the air cleaning device 1 in the direction of the arrow 65 using a fan or the like (not shown). On the other hand, a voltage is applied between the first electrode 20 and the base 14 of the photocatalyst-ozone decomposition catalyst module 10 using the power supply unit 50, and the photocatalyst function unit of the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10. 11 generates discharge light. At this time, the first electrode 20 is used as a high-voltage electrode, and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is used as a ground electrode for discharging.

  When discharge light is generated between the first electrode 20 and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10, due to the action of the discharge light, oxygen from air in the vicinity of the discharge light in the flow path 60 is generated. Ozone is generated. The generated ozone oxidizes and decomposes a part of the organic chemical substance in the air in the channel 60 downstream from the vicinity of the discharge light, that is, in the channel 60 downstream from the first electrode 20.

  On the other hand, in the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10, a photocatalytic reaction occurs in the photocatalytic reaction unit 15 due to the discharge light, and hydroxy radicals (.OH) are generated from oxygen in the air. The hydroxy radical (.OH) oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60.

  For this reason, the amount of the organic chemical contained in the air that has passed through the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is small. Note that ozone usually remains in the air without being decomposed for several hours. For this reason, a considerable amount of ozone is present in the air that has passed through the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10.

  The air that has passed through the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is immediately introduced into the ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10.

  In the ozone decomposition function part 12 of the photocatalyst-ozone decomposition catalyst module 10, ozone present in the air that has passed through the photocatalyst function part 11 of the photocatalyst-ozone decomposition catalyst module 10 is decomposed on the surface of the ozone decomposition catalyst reaction part 17. At the same time, oxygen radicals with high chemical activity are generated during the decomposition of ozone. This oxygen radical decomposes substantially all organic chemical substances contained in the air in the flow path 60. For this reason, the organic chemical substance substantially does not exist in the air exhausted from the photocatalyst-ozone decomposition catalyst module 10 in the ozone decomposition function unit 12, that is, from the photocatalyst-ozone decomposition catalyst module 10 in the direction of the arrow 66. Note that oxygen radicals naturally disappear in a very short time. For this reason, the air discharged | emitted from the air purification apparatus 1 turns into the clean air which does not contain an organic chemical substance and oxygen radical substantially.

  Thus, in the air cleaning device 1, the photocatalyst function unit 11 and the ozone decomposition function unit 12 are integrally formed in one photocatalyst-ozone decomposition catalyst module 10. For this reason, since the length of the air flow direction of the air cleaning device 1 is smaller than that of a conventional air cleaning device in which the photocatalyst module and the ozone decomposition catalyst module are provided as separate members, the device can be thinned. The pressure loss is also reduced.

  That is, in the conventional air purifying device in which the photocatalyst module and the ozone decomposition catalyst module are provided as separate members, a flow path is provided between the photocatalyst module and the ozone decomposition catalyst module. The length of the air flow direction of 1 was increased, or the flow path was enlarged or reduced between the photocatalyst module and the ozone decomposition catalyst module, and the pressure loss was likely to increase.

  On the other hand, in the air cleaning device 1, there is no extra flow path between the photocatalyst module and the ozone decomposition catalyst module, and there is no expansion or contraction of the flow path. Since the length is reduced, the apparatus can be thinned, and pressure loss between the photocatalyst function unit 11 and the ozonolysis function unit 12 does not substantially occur.

  Further, in the air cleaning device 1, the photocatalyst-ozone decomposition catalyst module 10 also has a function as a ground electrode and can be discharged between the first electrode 20 that is a high-pressure electrode and the photocatalyst-ozone decomposition catalyst module 10. it can. For this reason, it is necessary to further provide a second electrode that is a ground electrode as in the conventional air purifying device in which the photocatalyst module is disposed between the first electrode as the high-voltage electrode and the second electrode as the ground electrode. There is no. Thereby, in the air purifying apparatus 1, the manufacturing cost of the second electrode, the space in the air flow direction of the air purifying apparatus 1 necessary for mounting the second electrode, and the pressure loss due to the second electrode are reduced. Can do.

  According to the air cleaning device 1, since the photocatalyst-ozone decomposition catalyst module 10 in which the photocatalyst function portion and the ozone decomposition catalyst function portion are formed on one substrate is used, the air cleaning device 1 is thin in the air flow direction. As well as pressure loss.

  Further, according to the air cleaning device 1, the photocatalyst-ozone decomposition catalyst module 10 also functions as a ground electrode, and it is not necessary to further provide a second electrode as a ground electrode on the downstream side of the photocatalyst function part. The apparatus 1 can be further reduced in thickness in the air flow direction, and the pressure loss is also reduced.

[Second Embodiment]
FIG. 5 is a cross-sectional view of a second embodiment of the air cleaning device according to the present invention.

  An air purifying apparatus 1A shown in FIG. 5 is a discharge-type photocatalytic air purifying apparatus similar to the air purifying apparatus 1 shown as the first embodiment in FIG. 1, and is disposed in a flow path 60 through which air flows. The photocatalyst-ozone decomposition catalyst module 10A and the discharge light having the first electrode 20A and the second electrode 30A provided separately and disposed opposite to the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 A generation electrode unit 40A and a power supply unit 50 for applying a voltage between the first electrode 20A and the second electrode 30A of the discharge light generation electrode unit 40A are provided.

  The air purification apparatus 1A shown as the second embodiment in FIG. 5 is a photocatalyst-ozone decomposition catalyst module 10 that is also used as a ground electrode, as compared with the air purification apparatus 1 shown as the first embodiment in FIG. A photocatalyst-ozone decomposition catalyst module 10A that is not used as a ground electrode instead of the first electrode 20 and a discharge light generating electrode that has a first electrode 20A and a second electrode 30A that are provided separately instead of the first electrode 20 The difference is that the unit 40A is used, and the conducting wire 52 connected to the power supply unit 50 is connected to the second electrode 30A of the discharge light generating electrode unit 40A instead of the photocatalyst-ozone decomposition catalyst module 10, and the other configurations are the same. It is.

  For this reason, the air purification apparatus 1A shown as the second embodiment in FIG. 5 attaches the same reference numerals to the same configuration as the air purification apparatus 1 shown as the first embodiment in FIG. The description is omitted or simplified.

(Photocatalyst-ozone decomposition catalyst module)
FIG. 6 is a perspective view of a photocatalyst-ozone decomposition catalyst module 10A used in the air cleaning device 1A shown in FIG. FIG. 7 is an enlarged view of the photocatalyst function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A shown in FIG. FIG. 8 is an enlarged view of the ozone decomposition function unit 12A of the photocatalyst-ozone decomposition catalyst module 10A shown in FIG.

  As shown in FIGS. 6 to 8, the photocatalyst-ozone decomposition catalyst module 10 </ b> A uses a breathable base 14 </ b> A, and in the base 14 </ b> A, the photocatalyst function part 11 </ b> A is formed in the upstream part, and the downstream part The ozonolysis function part 12A is formed.

  The photocatalyst—the photocatalyst of the ozone decomposition catalyst module 10A—the ozone decomposition catalyst module 10A and the photocatalyst function unit 11A are used as the photocatalyst—the photocatalyst of the ozone decomposition catalyst module 10—used in the air cleaning device 1 shown as the first embodiment in FIG. Compared to the ozone decomposition catalyst module 10 and the photocatalytic function unit 11, the difference is that the substrate 14A is used instead of the substrate 14, and the other configurations are the same.

  For this reason, hereinafter, the base 14A will be described, and descriptions of other configurations and operations will be omitted or simplified.

  The photocatalyst-ozone decomposition catalyst module 10A is disposed in the flow path 60 through which air flows.

<Substrate>
The base 14A used in the photocatalyst-ozone decomposition catalyst module 10A is a member having a space that allows ventilation, and is integrally formed throughout the photocatalyst-ozone decomposition catalyst module 10A.

  The photocatalyst-ozone decomposition catalyst module 10A used in the air purification apparatus 1A is not used as a ground electrode, unlike the photocatalyst-ozone decomposition catalyst module 10 used in the air purification apparatus 1 shown as the first embodiment in FIG. . For this reason, the base 14A of the photocatalyst-ozone decomposition catalyst module 10A used in the air cleaning device 1A does not have to be a member having electrical conductivity, and may be a member having electrical conductivity, or electrical conductivity. The member which does not have may be sufficient.

  The substrate 14A used in the photocatalyst-ozone decomposition catalyst module 10A is made of, for example, a porous member having a three-dimensional network structure or the like and a material having the same electrical conductivity as the substrate 14 used in the photocatalyst-ozone decomposition catalyst module 10. An example is a honeycomb structure.

Examples of the material of the base 14A when the base 14A is a porous member include, for example, silicates mainly composed of cordierite (Mg ₂ Al ₄ Si ₅ O ₁₈ ), alumina silicate glass, alumina, silica, magnesia. Silicon carbide, aluminum titanate, or the like is used. Here, having cordierite as a main component means that 50% by weight or more of the silicate is cordierite.

  The substrate 14A having a three-dimensional network structure is preferably cordierite because the photocatalytic reaction unit 15 is difficult to peel from the substrate 11.

  The case where the substrate 14A is a honeycomb structure made of an electrically conductive material is the same as the material of the substrate 14 used in the photocatalyst-ozone decomposition catalyst module 10 of the substrate 14A, and the description thereof will be omitted.

<Photocatalyst function unit>
As shown in FIG. 7, the photocatalytic function unit 11A includes a base 14A and a photocatalytic reaction unit 15 formed by supporting a photocatalyst on the surface of the base 14A.

  The photocatalyst used for forming the photocatalytic reaction unit 15 is the same as the photocatalyst used for forming the photocatalytic reaction unit 15 of the photocatalytic function unit 11 in the photocatalyst-ozone decomposition catalyst module 10 of the air cleaning device 1 shown as the first embodiment. Therefore, the description is omitted.

<Ozone decomposition function unit>
As shown in FIG. 8, the ozone decomposition function unit 12A includes a base 14A and an ozone decomposition catalyst reaction unit 17 formed by supporting an ozone decomposition catalyst on the surface of the base 14A.

  The ozone decomposition catalyst used for forming the ozone decomposition catalyst reaction unit 17 is the ozone decomposition catalyst reaction unit 17 of the ozone decomposition function unit 12 in the photocatalyst-ozone decomposition catalyst module 10 of the air cleaning device 1 shown as the first embodiment. Since it is the same as the ozone decomposition catalyst used for formation, description is abbreviate | omitted.

(Discharge light generating electrode unit)
The discharge light generating electrode unit 40A includes a first electrode 20A and a second electrode 30A that generates discharge light between the first electrode 20A.

  The discharge light generating electrode unit 40A is an electrode unit that performs barrier discharge (also referred to as silent discharge).

  The first electrode 20A is made of a conductor. Examples of the material of the conductor used for the first electrode 20A include copper and aluminum. The first electrode 20A has a cylindrical shape with a circular cross section, and a plurality of the first electrodes 20A are spaced apart and arranged substantially in parallel. Note that the first electrode 20A illustrated in FIG. 5 has a cylindrical shape, but the first electrode 20A may have a shape other than the cylindrical shape. The first electrode 20A may be, for example, a polygonal columnar shape such as a quadrangular columnar shape.

  The first electrode 20A is connected to the high voltage side terminal of the power supply unit 50 via the conductor 51 so as to become a high voltage electrode during discharge between the first electrode 20A and the second electrode 30A. Is done.

  The second electrode 30 </ b> A includes a conductor 31 and a dielectric layer 32 that covers the conductor 31. Examples of the material of the conductor 31 used for the second electrode 30A include the same conductors as those used for the first electrode 20A. Examples of the dielectric material used for the dielectric layer 32 of the second electrode 30A include plastics such as polyvinyl chloride.

  The second electrode 30A has a cylindrical shape with a circular cross section, and a plurality of the second electrodes 30A are spaced apart and arranged substantially in parallel. In addition, although the conductor 31 which comprises the 2nd electrode 30A and the 2nd electrode 30A shown in FIG. 5 is cylindrical, the shape of the 2nd electrode 30A and the conductor 31 is not restricted to a cylindrical shape. The second electrode 30A and the conductor 31 may have a polygonal column shape such as a quadrangular column shape, for example.

  The second electrode 30A is spaced apart from the first electrode 20A. Specifically, each of the first electrodes 20A is disposed in a gap between the second electrodes 30A.

  The second electrode 30A is connected to the terminal on the low voltage side of the power supply unit 50 via the conducting wire 52 so as to become a ground electrode when discharging between the first electrode 20A and the second electrode 30A. Is done.

  When a voltage is applied between the first electrode 20A and the second electrode 30A of the discharge light generating electrode unit 40A by the power supply unit 50, a discharge is generated between the first electrode 20A and the second electrode 30A. Light is generated.

  A discharge light generating electrode unit 40A shown in FIG. 5 has seven first electrodes 20A and six second electrodes 30A. However, in the discharge light generating electrode unit 40A that performs the barrier discharge of the present invention, the number of the first electrode 20A and the second electrode 30A is not limited to the above seven or six, and may be any number. it can.

(Power supply part)
The power supply unit 50 applies a voltage between the first electrode 20A and the second electrode 30A of the discharge light generating electrode unit 40A via the conductive wires 51 and 52.

  As the power supply unit 50, for example, a high-frequency high-voltage power supply, a high-voltage pulse generation circuit, a high-voltage DC power supply, or the like is used as in the power supply unit 50 used in the air cleaning device 1 shown as the first embodiment in FIG.

  The power supply unit 50 is connected to the first electrode 20A and the second electrode 30A so that the first electrode 20A becomes a high-voltage electrode and the second electrode 30A becomes a ground electrode during discharge.

  When a voltage is applied between the first electrode 20A and the second electrode 30A of the discharge light generating electrode unit 40A by the power supply unit 50, a discharge is generated between the first electrode 20A and the second electrode 30A. Light is generated.

(Function)
The operation of the air cleaning device 1A will be described with reference to FIG.

  Note that the action of the air cleaning device 1A shown as the second embodiment in FIG. 5 is less than the action of the air cleaning device 1 shown as the first embodiment in FIG. While the first electrode 20 and the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 are performed, the discharge of the air cleaning device 1A is performed by the first electrode 20A and the second electrode of the discharge light generating electrode unit 40A. The other operations are the same except that the operation is performed with respect to the electrode 30A. In order to avoid duplication, a part of the explanation of the action is omitted or simplified.

  First, air containing an organic chemical substance is supplied in the direction of arrow 65 into the flow path 60 of the air cleaning device 1A using a fan or the like (not shown). On the other hand, a voltage is applied between the first electrode 20A and the second electrode 30A of the discharge light generating electrode unit 40A using the power supply unit 50, and the first electrode 20A and the second electrode of the discharge light generating electrode unit 40A are connected. The discharge light is generated by barrier discharge between the electrode 30A. At this time, the first electrode 20A is used as a high-voltage electrode, and the second electrode 30A is used as a ground electrode for discharging.

  Since the discharge light generation electrode unit 40A is disposed on the photocatalyst function unit 11A side of the photocatalyst-ozone decomposition catalyst module 10A, the discharge light generated in the discharge light generation electrode unit 40A is the photocatalyst function of the photocatalyst-ozone decomposition catalyst module 10A. While strongly irradiated to the part 11A side, the ozone decomposition catalyst function part 12A side of the photocatalyst-ozone decomposition catalyst module 10A is not substantially irradiated.

  When discharge light is generated between the first electrode 20A and the second electrode 30A of the discharge light generation electrode unit 40A, the action of the discharge light causes oxygen in the air in the vicinity of the discharge light in the flow channel 60 to flow. Ozone is generated. The generated ozone oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60 downstream from the discharge light generating electrode unit 40A.

  On the other hand, in the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A, the photocatalytic reaction occurs in the photocatalytic reaction unit 15 by the discharge light generated in the discharge light generating electrode unit 40A, and hydroxy radicals (.OH) are generated from oxygen in the air. Generated. The hydroxy radical (.OH) oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60.

  For this reason, the amount of the organic chemical contained in the air that has passed through the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A is small. Note that ozone usually remains in the air without being decomposed for several hours. For this reason, a considerable amount of ozone is present in the air that has passed through the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A.

  The air that has passed through the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is immediately introduced into the ozone decomposition function unit 12A of the photocatalyst-ozone decomposition catalyst module 10A.

  The operation of the process after the air that has passed through the photocatalyst function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A is introduced into the ozone decomposition function unit 12A of the photocatalyst-ozone decomposition catalyst module 10A is shown in FIG. 1 as the first embodiment. Since it is the same as the effect | action of the shown air purification apparatus 1, description is abbreviate | omitted.

  According to the air cleaning device 1A, since the photocatalyst-ozone decomposition catalyst module 10A in which the photocatalyst functional part and the ozone decomposition catalyst functional part are formed on one substrate is used, the air shown as the first embodiment in FIG. The same effect as the cleaning device 1 is produced.

  In addition, according to the air cleaning device 1A, the photocatalyst-ozone decomposition catalyst module 10A is not used as a ground electrode, and the discharge light generation electrode unit 40A irradiates discharge light alone. Compared to the air cleaning device 1, more stable discharge can be performed.

  The thickness in the flow direction of the flow path 60 of the discharge light generating electrode unit 40A is approximately the same as the thickness of the first electrode 20 of the air cleaning device 1 shown as the first embodiment in FIG. For this reason, even if the discharge light generating electrode unit 40 </ b> A is disposed, the thickness of the air cleaning device 1 </ b> A in the direction of the flow path 60 is not longer than that of the air cleaning device 1.

[Third Embodiment]
FIG. 9 is a cross-sectional view of a third embodiment of the air cleaning device according to the present invention.

  An air purifying apparatus 1B shown in FIG. 9 is a discharge photocatalytic air purifying apparatus similar to the air purifying apparatus 1 shown as the first embodiment in FIG. 1, and is arranged in a flow path 60 through which air flows. The photocatalyst-ozone decomposition catalyst module 10A and the photocatalyst function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A are arranged opposite to each other, and the first electrode 20B and the second electrode 30B are covered with a dielectric and integrated. The discharge light generating electrode unit 40B, and the power supply unit 50 that applies a voltage between the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B are provided.

  9 is a photocatalyst-ozone decomposition catalyst module 10 that is also used as a ground electrode, as compared with the air purification device 1 shown as the first embodiment in FIG. Instead, the photocatalyst-ozone decomposition catalyst module 10A that is not used as a ground electrode is used, and the first electrode 20B and the second electrode 30B are covered with a dielectric instead of the first electrode 20 and integrated. The difference is that the light generating electrode unit 40B is used, and the conductive wire 52 connected to the power supply unit 50 is connected to the second electrode 30B of the discharge light generating electrode unit 40B instead of the photocatalyst-ozone decomposition catalyst module 10. The configuration is the same.

  For this reason, the air purifying apparatus 1B shown as the third embodiment in FIG. 9 attaches the same reference numeral to the same configuration as the air purifying apparatus 1 shown as the first embodiment in FIG. The description is omitted or simplified.

  Further, the photocatalyst-ozone decomposition catalyst module 10A used in the air purification apparatus 1B has the same configuration as the photocatalyst-ozone decomposition catalyst module 10A used in the air purification apparatus 1A shown as the second embodiment in FIG. For this reason, the description about the photocatalyst-ozone decomposition catalyst module 10A is omitted.

(Discharge light generating electrode unit)
The discharge light generating electrode unit 40B includes a first electrode 20B, a second electrode 30B that generates discharge light between the first electrode 20B, a first electrode 20B, and a second electrode 30B. And a dielectric layer that is integrally covered with a dielectric.

  The discharge light generating electrode unit 40B is an electrode unit that performs creeping barrier discharge.

  The first electrode 20B is made of a conductor. As the material of the conductor used for the first electrode 20B, for example, the conductor used for the first electrode 20A of the discharge light generating electrode unit 40A in the air cleaning device 1A shown as the second embodiment in FIG. The same can be mentioned.

  The first electrode 20B has a rectangular column shape with a rectangular cross section. Note that although the first electrode 20B illustrated in FIG. 9 has a quadrangular prism shape, the first electrode 20B may have a shape other than the quadrangular prism shape. The first electrode 20B may be, for example, a polygonal columnar shape such as a hexagonal columnar shape or a columnar shape.

  The first electrode 20B is connected to the high-voltage side terminal of the power supply unit 50 via the conducting wire 51 so as to become a high-voltage electrode during discharge between the first electrode 20B and the second electrode 30B. Is done.

  The second electrode 30B is made of a conductor. Examples of the material of the conductor used for the second electrode 30B include the same material as that of the conductor used for the first electrode 20B. The second electrode 30B is spaced apart from the first electrode 20B so as not to conduct.

  The first electrode 20 </ b> B and the second electrode 30 </ b> B that are spaced apart are integrally covered with a dielectric layer 42.

  The dielectric layer 42 is a layer made of a dielectric material and integrally covering the first electrode 20B and the second electrode 30B. As the dielectric used for the dielectric layer 42, for example, the dielectric used for the dielectric layer 32 of the second electrode 30A of the discharge light generating electrode unit 40A in the air cleaning device 1A shown as the second embodiment in FIG. The same thing as the body.

  The dielectric layer 42 has a rectangular column shape with a rectangular cross section. When the dielectric layer 42 has a quadrangular prism shape, the first electrode 20B and the second electrode 30B embedded in the vicinity of the outer surface of the dielectric layer 42 can easily perform creeping barrier discharge on the outer surface of the dielectric layer 42. Therefore, it is preferable. The dielectric layer 42 may have a shape other than the quadrangular prism shape. The dielectric layer 42 may be, for example, a polygonal column shape such as a hexagonal column shape or a cylindrical shape.

  As shown in FIG. 9, the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B are in the vicinity of one of the lower surfaces in FIG. 5 among the four outer surfaces in the cross-sectional direction of the dielectric layer 42. Buried in parallel with It is preferable that the first electrode 20B and the second electrode 30B are embedded in parallel in the vicinity of one surface of the outer surface of the dielectric layer 42 because creeping barrier discharge is easily performed on the outer surface of the dielectric layer 42.

  Seven discharge light generating electrode units 40B are used, and the seven discharge light generating electrode units 40B, 40B,.

  The first electrode 20B of each discharge light generating electrode unit 40B has a power supply unit 50 via a conducting wire 51 so as to become a high-voltage electrode during discharge between the first electrode 20B and the second electrode 30B. Is connected to the high voltage side terminal.

  In addition, the second electrode 30B of each discharge light generating electrode unit 40B is connected to a power source via a conducting wire 52 so as to become a ground electrode during discharge between the first electrode 20B and the second electrode 30B. It is connected to the low voltage side terminal of the unit 50.

  When a voltage is applied between the first electrode 20B and the second electrode 30B of the discharge light generation electrode unit 40B by the power supply unit 50, along the lower surface of the discharge light generation electrode unit 40B in FIG. The discharge light is generated between the first electrode 20B and the second electrode 30B.

  FIG. 9 shows seven discharge light generating electrode units 40B. However, in the discharge light generating electrode unit 40B that performs creeping barrier discharge of the present invention, the number of discharge light generating electrode units 40B is not limited to the above seven, and can be any number.

(Power supply part)
The power supply unit 50 applies a voltage between the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B via the conductive wires 51 and 52.

  As the power supply unit 50, for example, a high-frequency high-voltage power supply, a high-voltage pulse generation circuit, a high-voltage DC power supply, or the like is used as in the power supply unit 50 used in the air cleaning device 1 shown as the first embodiment in FIG.

  The power supply unit 50 is connected to the first electrode 20B and the second electrode 30B so that the first electrode 20B becomes a high-voltage electrode and the second electrode 30B becomes a ground electrode during discharge.

  When a voltage is applied between the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B by the power supply unit 50, a discharge is generated between the first electrode 20B and the second electrode 30B. Light is generated.

(Function)
The operation of the air cleaning device 1B will be described with reference to FIG.

  Note that the action of the air cleaning device 1B shown in FIG. 9 as the third embodiment is less than that of the air cleaning device 1 shown in FIG. 1 as the first embodiment. While the first electrode 20 and the photocatalytic function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 are performed, the discharge of the air cleaning device 1B is performed by the first electrode 20B and the second electrode of the discharge light generating electrode unit 40B. The other operations are the same except that it is performed with the other electrode 30B. In order to avoid duplication, a part of the explanation of the action is omitted or simplified.

  First, air containing an organic chemical substance is supplied into the flow path 60 of the air cleaning device 1B in the direction of the arrow 65 using a fan or the like (not shown). On the other hand, a voltage is applied between the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B using the power supply unit 50, and the first electrode 20B and the second electrode of the discharge light generating electrode unit 40B are Discharge light is generated by creeping barrier discharge between the electrodes 30B. At this time, the first electrode 20B is used as a high-voltage electrode and the second electrode 30B is used as a ground electrode for discharging.

  Since the discharge light generation electrode unit 40B is disposed on the photocatalyst function unit 11A side of the photocatalyst-ozone decomposition catalyst module 10A, the discharge light generated in the discharge light generation electrode unit 40B is the photocatalyst function of the photocatalyst-ozone decomposition catalyst module 10A. While strongly irradiated to the part 11A side, the ozone decomposition catalyst function part 12A side of the photocatalyst-ozone decomposition catalyst module 10A is not substantially irradiated.

  When discharge light is generated between the first electrode 20B and the second electrode 30B of the discharge light generating electrode unit 40B, the action of the discharge light causes oxygen in the air in the vicinity of the discharge light in the flow path 60 to flow. Ozone is generated. The generated ozone oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60 downstream from the discharge light generating electrode unit 40B.

  On the other hand, in the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A, the photocatalytic reaction occurs in the photocatalytic reaction unit 15 by the discharge light generated in the discharge light generating electrode unit 40B, and hydroxy radicals (.OH) are generated from oxygen in the air. Generated. The hydroxy radical (.OH) oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60.

  For this reason, the amount of the organic chemical contained in the air that has passed through the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A is small. Note that ozone usually remains in the air without being decomposed for several hours. For this reason, a considerable amount of ozone is present in the air that has passed through the photocatalytic function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A.

  The air that has passed through the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is immediately introduced into the ozone decomposition function unit 12A of the photocatalyst-ozone decomposition catalyst module 10A.

  The operation of the process after the air that has passed through the photocatalyst function unit 11A of the photocatalyst-ozone decomposition catalyst module 10A is introduced into the ozone decomposition function unit 12A of the photocatalyst-ozone decomposition catalyst module 10A is shown in FIG. 1 as the first embodiment. Since it is the same as the effect | action of the shown air purification apparatus 1, description is abbreviate | omitted.

  According to the air cleaning device 1A, since the photocatalyst-ozone decomposition catalyst module 10A in which the photocatalyst functional part and the ozone decomposition catalyst functional part are formed on one substrate is used, the air shown as the first embodiment in FIG. The same effect as the cleaning device 1 is produced.

  Further, according to the air cleaning device 1B, the photocatalyst-ozone decomposition catalyst module 10A is not used as a ground electrode, and the discharge light generation electrode unit 40B irradiates discharge light alone. Compared to the air cleaning device 1, more stable discharge can be performed.

  In addition, the thickness of the flow direction of the flow path 60 of the discharge light generation electrode unit 40B is substantially the same as the thickness of the first electrode 20 of the air cleaning device 1 shown as the first embodiment in FIG. For this reason, even if the discharge light generating electrode unit 40B is disposed, the thickness of the air cleaning device 1B in the direction of the flow path 60 is not longer than that of the air cleaning device 1.

[Other Embodiments]
In the photocatalyst-ozone decomposition catalyst module 10 of the first embodiment, the photocatalyst function unit 11 has a base 14 and a photocatalytic reaction part 15 formed on the surface of the base 14 as shown in FIG. is there.

  Further, in the photocatalyst-ozone decomposition catalyst module 10 of the first embodiment, the ozone decomposition function unit 12 includes a base 14 and an ozone decomposition catalyst reaction unit 17 formed on the surface of the base 14 as shown in FIG. It has.

  However, in the photocatalyst-ozone decomposition catalyst module used in the air cleaning device of the present invention, even if the photocatalyst function unit 11 or the ozone decomposition function unit 12 is further provided with an adsorbing part made of an adsorbent that adsorbs an organic chemical substance. Good.

  When an adsorption part is further formed in the photocatalyst function part 11 or the ozonolysis function part 12, the organic chemical substance in the air in the flow path 60 is quickly adsorbed to the adsorption part, and the organic chemical substance adsorbed to the adsorption part is It moves to the photocatalytic reaction part and the ozone decomposition catalytic reaction part by surface diffusion. Organic chemical substances that have moved to the photocatalytic reaction zone or ozone decomposition catalytic reaction zone are oxidatively decomposed by hydroxy radicals (.OH) generated by the photocatalytic reaction or oxygen radicals generated by the ozone decomposition reaction. Chemical substances are not saturated by adsorption. For this reason, when an adsorption part is further formed in the photocatalyst function part 11 or the ozone decomposition function part 12, the rapid removal of the organic chemical substance in air and the maintenance-free of a photocatalyst and an ozone decomposition catalyst are attained.

  Hereinafter, an embodiment in which an adsorption part is further formed in the photocatalyst function part 11 and the ozone decomposition function part 12 of the photocatalyst-ozone decomposition catalyst module will be described.

[Embodiment in which adsorption part is formed in photocatalyst function part]
FIG. 10 is an enlarged view of another form of the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module shown in FIG.

  As shown in FIG. 10, the photocatalytic function unit 11 </ b> K includes an organic chemical substance on a base 14, a photocatalytic reaction part 15 formed by supporting a photocatalyst on the surface of the base 14, and a part of the surface of the photocatalytic reaction part 15. And a photocatalyst adjacent adsorbing portion 16 formed by carrying an adsorbent that adsorbs the adsorbent.

  The photocatalyst function unit 11K shown in FIG. 10 is further enlarged as compared with the photocatalyst function unit 11 shown in FIG. 3, which is an enlarged view of the photocatalyst-ozone decomposition catalyst module 10 shown in FIG. The other configurations are the same. For this reason, in the photocatalyst function unit 11K illustrated in FIG. 10, the same reference numerals are given to the same configurations as those of the photocatalyst function unit 11 illustrated in FIG. 3, and the description of the configuration and operation is omitted or simplified.

  In the air cleaning device 1 shown in FIG. 1, the photocatalyst-ozone decomposition catalyst module including the photocatalyst function unit 11K is referred to as a photocatalyst-ozone decomposition catalyst module 10K instead of the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10. Further, an air cleaning device including the photocatalyst-ozone decomposition catalyst module 10K is referred to as an air cleaning device 1K. The air cleaning device 1K is shown in FIG.

  Hereinafter, the photocatalyst adjacent adsorption part 16 of the photocatalyst function part 11K will be described.

<Photocatalyst adjacent adsorbing part>
As shown in FIG. 10, the photocatalyst adjacent adsorbing portion 16 is formed by further supporting an adsorbent that adsorbs an organic chemical substance on a part of the surface of the photocatalytic reaction portion 15.

  The photocatalyst adjacent adsorbing part 16 adsorbs an organic chemical substance contained in the air in the flow path 60.

  Examples of the adsorbent used for forming the photocatalyst adjacent adsorbing portion 16 include manganese dioxide, zeolite, and platinum group metal fine particles. Among these, zeolite is preferable because it is not decomposed by photocatalytic reaction or ozone.

  The zeolite may be in a bulk shape, but a fine particle shape is preferable because it is easily supported on the surface of the photocatalytic reaction unit 15.

  Examples of the platinum group metal include at least one of platinum, iridium, osmium, palladium, rhodium, and ruthenium.

  When the adsorbent is in the form of fine particles, the particle diameter of the adsorbent is usually 1 nm to 100 nm. It is preferable that the particle size of the adsorbent is within this range because the organic chemical substance adsorbed by the photocatalyst adjacent adsorbing portion 16 is rapidly oxidized and decomposed by the adjacent photocatalytic reaction portion 15. That is, if the adsorbent fine particles are as small as about 1 nm to 100 nm, the organic chemical substance adsorbed on the adsorbent fine particles can quickly move to the adjacent photocatalytic reaction unit 15 by surface diffusion on the adsorbent fine particles. Rapidly oxidatively decomposes.

  The photocatalyst adjacent adsorbing portion 16 is formed by supporting the adsorbent on the surface of the photocatalytic reaction portion 15 by a known method.

  For example, the photocatalyst adjacent adsorbing portion 16 supports the photocatalyst on the surface of the base 14, impregnates the base 14 with a sol in which adsorbent fine particles are dispersed in an aqueous solution, and then calcinates the adsorbent fine particles. It is obtained by carrying it on the surface of the photocatalytic reaction part 15 made of a photocatalyst. Further, the photocatalyst adjacent adsorbing portion 16 may be formed by being supported on the surface of the photocatalytic reaction portion 15 by CVD (Chemical Vapor Deposition Supporting Method) instead of the impregnation, firing and supporting step.

  Further, by using a sol in which both photocatalyst fine particles and adsorbent fine particles are dispersed, this sol is impregnated into the base 14 and baked to carry the photocatalyst fine particles and the adsorbent fine particles on the base 14. A method of forming the photocatalyst adjacent adsorbing portion 16 and the photocatalytic reaction portion 15 on the surface may be used. Further, instead of the impregnation, firing and supporting step, the supporting step may be performed by CVD.

  The molar ratio of the photocatalyst to the adsorbent on the substrate is preferably 1: 1 to 1: 5.

(Function)
The operation of the air cleaning device 1K will be described with reference to FIG.

  First, air containing an organic chemical substance is supplied in the direction of arrow 65 into the flow path 60 of the air cleaning device 1K using a fan or the like (not shown). On the other hand, a voltage is applied between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10K using the power supply unit 50, and discharge light is generated between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10K. generate.

  When discharge light is generated between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10K, oxygen in the air in the vicinity of the discharge light in the flow path 60 generates ozone by the action of the discharge light. The generated ozone oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60.

  In the photocatalytic function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K, a photocatalytic reaction is caused by the discharge light in the photocatalytic reaction unit 15, and an adsorption reaction of an organic chemical substance occurs in the photocatalyst adjacent adsorption unit 16.

  That is, when discharge light is generated between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10K, the photocatalytic reaction unit 15 causes a photocatalytic reaction by the discharge light, and oxygen radicals (.OH) are generated from oxygen in the air. Is generated. The hydroxy radical (.OH) oxidizes and decomposes part of the organic chemical substance in the air in the flow path 60.

  In addition, another part of the organic chemical substance in the air in the flow path 60 is adsorbed by the photocatalyst adjacent adsorbing portion 16.

  In addition, in the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K, the adsorption rate of the organic chemical substance in the photocatalyst adjacent adsorption unit 16 is higher than the reaction rate of the oxidative decomposition of the organic chemical substance in the photocatalyst reaction unit 15. fast. For this reason, normally, a part of the organic chemical substance in the air in the vicinity of the photocatalyst function part 11K of the photocatalyst-ozone decomposition catalyst module 10K in the flow path 60 is quickly adsorbed by the photocatalyst adjacent adsorption part 16. In addition, another part of the organic chemical substance in the air in the vicinity of the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K in the flow path 60 is adsorbed by the photocatalyst reaction unit 15 by the photocatalytic reaction in the photocatalyst reaction unit 15. It is oxidatively decomposed at a slower rate than the adsorption reaction to 16.

  Furthermore, the organic chemical substance adsorbed on the photocatalyst adjacent adsorbing portion 16 moves from the photocatalyst adjacent adsorbing portion 16 to the photocatalytic reaction portion 15 by surface diffusion, and is oxidatively decomposed in the photocatalytic reaction portion 15. For this reason, in the photocatalyst adjacent adsorption | suction part 16, the adsorption saturation of an organic chemical substance does not arise.

  Thus, in the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K, the rapid adsorption reaction of the organic chemical substance in the air to the photocatalyst adjacent adsorption part 16 and the photocatalytic reaction part 15 of the organic chemical substance in the air Oxidation decomposition reaction slower than the adsorption reaction, movement of the organic chemical substance adsorbed on the photocatalyst adjacent adsorbing part 16 to the photocatalytic reaction part 15, and photocatalyst of the organic chemical substance moved from the photocatalyst adjacent adsorbing part 16 to the photocatalytic reaction part 15 The oxidative decomposition reaction in the reaction unit 15 occurs in parallel. For this reason, there are very few organic chemical substances in the air discharged | emitted from the photocatalyst function part 11K of the photocatalyst-ozone decomposition catalyst module 10K.

  Ozone usually remains undecomposed for several hours in air. For this reason, a considerable amount of ozone exists in the air discharged from the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K.

  The action of the process after the air that has passed through the photocatalytic function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K in the air cleaning device 1K is introduced into the ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10K is shown in FIG. Since it is the same as the effect | action of the air purifying apparatus 1 shown as 1 embodiment, description is abbreviate | omitted.

  As described above, in the air cleaning device 1K, part of the organic chemical substance in the air in the vicinity of the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K is a photocatalyst of the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K. While being adsorbed and removed quickly by the adjacent adsorbing part 16, the other part is oxidatively decomposed by the photocatalytic reaction part 15 of the photocatalytic function part 11K of the photocatalyst-ozone decomposition catalyst module 10K. Moreover, the organic chemical substance adsorbed on the photocatalyst adjacent adsorbing portion 16 moves to the adjacent photocatalytic reaction portion 15 due to surface diffusion and is oxidatively decomposed. As described above, in the photocatalyst adjacent adsorbing portion 16, the adsorbed organic chemical substance moves to the photocatalytic reaction portion 15, so that the problem of adsorption saturation of the organic chemical substance does not substantially occur. For this reason, the photocatalyst function unit 11K of the photocatalyst-ozone decomposition catalyst module 10K does not require maintenance such as replacement of the adsorbent and can be used semipermanently.

  In the air cleaning device 1K, the organic chemical substance in the air in the vicinity of the ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10K is converted into an ozone decomposition catalyst reaction unit of the ozone decomposition function unit 12 of the photocatalyst-ozone decomposition catalyst module 10K. 17 is oxidatively decomposed by the oxygen radicals generated in 17. The ozonolysis function unit 12 of the photocatalyst-ozone decomposition catalyst module 10K is not provided with a special adsorbing unit, so that the problem of adsorption saturation of organic chemical substances does not occur. For this reason, the ozonolysis function part 12 of the photocatalyst-ozone decomposition catalyst module 10K does not require maintenance such as replacement of the adsorbent, and can be used semipermanently.

  According to the air cleaning device 1K, organic chemical substances in the air can be quickly adsorbed and removed, and the organic chemical substances can be efficiently oxidized and decomposed. Further, according to the air cleaning device 1K, the photocatalyst-ozone decomposition catalyst module 10K can be used semipermanently.

  In the photocatalyst function part 11K shown in FIG. 10, the photocatalyst adjacent adsorbing part 16 is formed on a part of the surface of the photocatalyst reaction part 15 on the substrate 14, but the photocatalyst-ozone decomposition catalyst module of the air purifying apparatus of the present invention. In the photocatalytic function unit, the photocatalytic reaction unit 15 may be formed on a part of the surface of the photocatalyst adjacent adsorption unit 16 on the substrate 14.

  That is, the arrangement of the photocatalytic reaction part 15 and the photocatalyst adjacent adsorption part 16 on the substrate 14 may be reversed.

  FIG. 11 is an enlarged view of still another embodiment of the photocatalytic function unit of the photocatalyst-ozone decomposition catalyst module shown in FIG.

  As shown in FIG. 11, the photocatalytic function unit 11 </ b> L includes a substrate 14, a photocatalyst adjacent adsorption unit 16 formed by supporting an adsorbent that adsorbs an organic chemical substance on the surface of the substrate 14, and a photocatalyst adjacent adsorption unit 16. And a photocatalytic reaction part 15 formed by supporting a photocatalyst on a part of the surface.

  Compared to the photocatalyst function unit 11K shown in FIG. 10, the photocatalyst function unit 11L has a photocatalyst adjacent adsorbing unit 16 formed on the substrate 14 and a photocatalyst reaction unit 15 on the surface of the photocatalyst adsorbing unit 16. It differs in that it is formed in part, and the other configurations are the same. For this reason, in the photocatalyst function unit 11L illustrated in FIG. 11, the same reference numerals are given to the same configurations as those of the photocatalyst function unit 11K illustrated in FIG. 10, and descriptions of the configurations and operations are omitted or simplified.

  In the air cleaning device 1 shown in FIG. 1, the photocatalyst-ozone decomposition catalyst module including the photocatalyst function unit 11L instead of the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10 is referred to as a photocatalyst-ozone decomposition catalyst module 10L. Further, an air cleaning device including the photocatalyst-ozone decomposition catalyst module 10L is referred to as an air cleaning device 1L. The air cleaning device 1L is shown in FIG.

  The photocatalytic function unit 11L is obtained, for example, by forming an adsorbent on the substrate 14 to form the photocatalyst adjacent adsorbing unit 16 and supporting a photocatalyst on the photocatalyst adjacent adsorbing unit 16 to form the photocatalytic reaction unit 15. It is done.

  Specifically, the substrate 14 is impregnated with a sol in which adsorbent fine particles are dispersed in an aqueous solution, and after firing, the photocatalyst adjacent adsorbing portion 16 is formed on the surface of the substrate 14 and then a photocatalyst supporting step is performed. The photocatalytic reaction unit 15 may be formed on the surface of the photocatalyst adjacent adsorption unit 16. Further, in place of the impregnation of the adsorbent sol to the substrate 14 and the firing step, the adsorbent is supported on the surface of the substrate 14 by CVD to form the photocatalyst adjacent adsorbing portion 16, and then the photocatalyst adjacent adsorbing portion 16 is formed by CVD. The photocatalytic reaction part 15 may be formed on the surface. The molar ratio of the photocatalyst to the adsorbent on the substrate is preferably 1: 1 to 1: 5.

  Since the operation of the air cleaning device 1L is the same as the operation of the air cleaning device 1K, description thereof is omitted.

[Embodiment in which adsorption part is formed in ozonolysis function part]
FIG. 12 is an enlarged view of another form of the ozone decomposition function part of the photocatalyst-ozone decomposition catalyst module shown in FIG.

  As shown in FIG. 12, the ozonolysis functional unit 12M includes a base 14, an ozone decomposition catalyst reaction unit 17 formed by supporting an ozone decomposition catalyst on the surface of the base 14, and a surface of the ozone decomposition catalyst reaction unit 17. A part further includes an ozone decomposition catalyst adjacent adsorbing portion 18 formed by supporting an adsorbent that adsorbs an organic chemical substance.

  12 is an enlarged view of the photocatalyst-ozone decomposition catalyst module 10 shown in FIG. 2, and the ozone decomposition catalyst adjacent adsorbing portion 18 is further compared to the ozone decomposition function portion 12 shown in FIG. The other configurations are the same except that they are formed. For this reason, the ozonolysis function part 12M shown in FIG. 12 attaches | subjects the same code | symbol to the same structure as the ozonolysis function part 12 shown in FIG. 4, and abbreviate | omits or simplifies description of a structure and an effect | action.

  In addition, in the air purifying apparatus 1 shown in FIG. 1, it replaces with the ozone decomposition function part 12 of the photocatalyst-ozone decomposition catalyst module 10, and the photocatalyst-ozone decomposition catalyst module provided with the ozone decomposition function part 12M is called photocatalyst-ozone decomposition catalyst module 10M. . Further, an air cleaning device including the photocatalyst-ozone decomposition catalyst module 10M is referred to as an air cleaning device 1M. The air purifier 1M is shown in FIG.

  Hereinafter, the ozone decomposition catalyst adjacent adsorption part 18 of the photocatalyst function part 11M will be described.

<Adjacent adsorption part of ozone decomposition catalyst>
As shown in FIG. 12, the ozone decomposition catalyst adjacent adsorbing portion 18 is formed by further supporting an adsorbent that adsorbs an organic chemical substance on a part of the surface of the ozone decomposition catalyst reaction portion 17. .

  The ozone decomposition catalyst adjacent adsorbing part 18 adsorbs organic chemical substances contained in the air in the flow path 60.

  Examples of the adsorbent used for forming the ozone decomposing catalyst adjacent adsorbing portion 18 include the same adsorbents used for forming the photocatalyst adjacent adsorbing portion 16. Of the adsorbent materials used to form the photocatalyst adjacent adsorbing portion 16, zeolite is preferable because it is not decomposed by ozone.

  The ozone decomposition catalyst adjacent adsorbing portion 18 is formed by supporting an adsorbent on the surface of the ozone decomposition catalyst reaction portion 17 by a known method.

  As a specific method for forming the ozone decomposition catalyst adjacent adsorbing portion 18 by supporting the adsorbent on the surface of the ozone decomposition catalyst reaction portion 17, for example, the adsorbent is supported on the surface of the photocatalytic reaction portion 15 and adsorbing the photocatalyst adjacent adsorbing portion. The same method used to form 16 is used.

  The molar ratio of the ozonolysis catalyst to the adsorbent on the substrate is preferably 1: 1 to 1: 5.

(Function)
The operation of the air cleaning device 1M will be described with reference to FIG.

  First, air containing an organic chemical substance is supplied in the direction of the arrow 65 into the flow path 60 of the air cleaning device 1M using a fan or the like (not shown). On the other hand, a voltage is applied between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10M using the power supply unit 50, and discharge light is generated between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10M. generate.

  The action of the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10M when discharge light is generated between the first electrode 20 and the photocatalyst-ozone decomposition catalyst module 10M is shown in FIG. 1 as the first embodiment. Since it is the same as the effect | action of the photocatalyst function part 11 of the shown air purifying apparatus 1, description is abbreviate | omitted.

  The air that has passed through the photocatalyst function unit 11 of the photocatalyst-ozone decomposition catalyst module 10M is immediately introduced into the ozone decomposition function unit 12M of the photocatalyst-ozone decomposition catalyst module 10M.

  The ozone decomposing function unit 12M of the photocatalyst-ozone decomposing catalyst module 10M adsorbs organic chemical substances present in the air that has passed through the photocatalyst function unit 11, and decomposes ozone present in the air that has passed through the photocatalyst function unit 11. Furthermore, oxygen radicals with high chemical activity are generated during the decomposition of ozone.

  That is, in the ozonolysis function unit 12M of the photocatalyst-ozone decomposition catalyst module 10M, first, an organic chemical substance in the air in the flow path 60 is adsorbed on the ozone decomposition catalyst adjacent adsorption unit 18. The organic chemical substance adsorbed on the ozone decomposition catalyst adjacent adsorption unit 18 moves from the ozone decomposition catalyst adjacent adsorption unit 18 to the ozone decomposition catalyst reaction unit 17 by surface diffusion. The organic chemical substance that has moved to the ozone decomposition catalyst reaction unit 17 is oxidatively decomposed by oxygen radicals in the vicinity of the surface of the ozone decomposition catalyst reaction unit 17.

  Further, in the ozone decomposition function unit 12M of the photocatalyst-ozone decomposition catalyst module 10M, ozone contained in the air in the flow path 60 is decomposed on the surface of the ozone decomposition catalyst reaction unit 17, and chemicals are generated when ozone is decomposed. Highly active oxygen radicals are generated. This oxygen radical oxidizes and decomposes the organic chemical substance contained in the air in the flow path 60 and moves to the ozone decomposition catalyst reaction part 17 by surface diffusion after being adsorbed by the ozone decomposition catalyst adjacent adsorption part 18. Also oxidatively decomposes. Thereby, substantially all organic chemical substances contained in the air in the flow path 60 are removed.

  As described above, the organic chemical substance adsorbed on the ozone decomposition catalyst adjacent adsorption unit 18 moves to the ozone decomposition catalyst reaction unit 17 and is oxidatively decomposed. Virtually does not occur. For this reason, the photocatalyst-ozone decomposition catalyst module 10M of the air cleaning device 1M does not require maintenance such as replacement of the adsorbent, and can be used semipermanently.

  According to the air cleaning device 1M, organic chemical substances in the air can be quickly adsorbed and removed, and the organic chemical substances can be efficiently oxidized and decomposed. Further, according to the air cleaning device 1M, the photocatalyst-ozone decomposition catalyst module 10M can be used semipermanently.

  In the ozone decomposition function unit 12M shown in FIG. 12, the ozone decomposition catalyst adjacent adsorption unit 18 is formed on a part of the surface of the ozone decomposition catalyst reaction unit 17 on the substrate 14, but the photocatalyst of the air cleaning device of the present invention In the ozonolysis function part of the ozonolysis catalyst module, the ozonolysis catalyst reaction part 17 may be formed on a part of the surface of the ozone decomposition catalyst adjacent adsorption part 18 on the substrate 14.

  That is, the arrangement of the ozone decomposition catalyst reaction unit 17 and the ozone decomposition catalyst adjacent adsorption unit 18 on the substrate 14 may be reversed.

  FIG. 13 is an enlarged view of still another embodiment of the ozonolysis function part of the photocatalyst-ozone decomposition catalyst module shown in FIG.

  As shown in FIG. 13, the ozonolysis function unit 12N includes a base 14, an ozone decomposition catalyst adjacent adsorption unit 18 formed by supporting an adsorbent that adsorbs an organic chemical substance on the surface of the base 14, and an ozone decomposition catalyst. An ozone decomposition catalyst reaction section 17 formed by supporting an ozone decomposition catalyst on a part of the surface of the adjacent adsorption section 18 is provided.

  The ozone decomposing function unit 12N shown in FIG. 13 has an ozone decomposing catalyst adjacent adsorbing unit 18 formed on the substrate 14 and an ozone decomposing catalyst reaction unit 17 in ozone decomposing as compared with the ozone decomposing function unit 12M shown in FIG. It is different in that it is formed on a part of the surface of the catalyst adjacent adsorbing portion 18, and the other configurations are the same. For this reason, the ozonolysis function unit 12N shown in FIG. 13 attaches the same reference numerals to the same configuration as the ozonolysis function unit 12M shown in FIG. 12, and omits or simplifies the description of the configuration and operation.

  In addition, in the air purifying apparatus 1 shown in FIG. 1, it replaces with the ozone decomposition function part 12 of the photocatalyst-ozone decomposition catalyst module 10, and replaces the photocatalyst-ozone decomposition catalyst module provided with the ozone decomposition function part 12N with the photocatalyst-ozone decomposition catalyst module 10N. That's it. Further, an air cleaning device including the photocatalyst-ozone decomposition catalyst module 10N is referred to as an air cleaning device 1N. The air cleaning device 1N is shown in FIG.

  The ozone decomposing function unit 12N, for example, supports the adsorbent on the base 14 to form the ozone decomposing catalyst adjacent adsorbing unit 18 and also supports the photocatalyst on the ozone decomposing catalyst adjacent adsorbing unit 18 to generate the ozone decomposing catalyst reaction unit. 17 is obtained.

  Specifically, the base 14 is impregnated with a sol in which adsorbent fine particles are dispersed in an aqueous solution, and the ozone decomposition catalyst adjacent adsorbing portion 18 is formed on the surface of the base 14 for the first time. The ozone decomposition catalyst reaction part 17 may be formed on the surface of the ozone decomposition catalyst adjacent adsorption part 18 by performing the process. Further, instead of the impregnation of the adsorbent sol to the substrate 14 and the firing step, the adsorbent is supported on the surface of the substrate 14 by CVD to form the adsorbing portion 18 adjacent to the ozone decomposition catalyst, and then adjacent to the ozone decomposition catalyst by CVD. The ozone decomposition catalyst reaction unit 17 may be formed on the surface of the adsorption unit 18. The molar ratio of the ozonolysis catalyst to the adsorbent on the substrate is preferably about 1: 1 to 1: 5.

  Air purifiers 1K to 1N shown as other embodiments are photocatalyst-ozone decomposition catalysts in place of photocatalyst-ozone decomposition catalyst module 10 in air cleaner 1 shown as the first embodiment in FIG. Modules 10K to 10N are used.

  However, the air purifying apparatus of the present invention includes the photocatalyst-ozone decomposition catalyst module 10A of the air purifying apparatus 1A shown as the second embodiment in FIG. 5 and the air purifying apparatus 1B shown as the third embodiment in FIG. Instead of the photocatalyst-ozone decomposition catalyst module 10B, the photocatalyst-ozone decomposition catalyst modules 10K to 10N may be used.

  The air purifier having this configuration is an invention produced by the photocatalyst-ozone decomposition catalyst module 10B of the air purifier 1A shown as the second embodiment in FIG. 5 or the air purifier 1B shown as the third embodiment in FIG. And the effect of the invention produced by the photocatalyst-ozone decomposition catalyst modules 10K to 10N are combined.

[Air cleaning method]
Next, an air cleaning method according to the present invention will be described with reference to the accompanying drawings.

  The air cleaning method according to the present invention is an air cleaning method using the air cleaning device according to the present invention.

  The air cleaning method according to the present invention includes, for example, a photocatalyst while irradiating the photocatalyst function unit of the photocatalyst-ozone decomposition catalyst module of the air purifying apparatus 1, 1A-1B, 1K-1N shown in the above embodiment. -Air is supplied to the ozone decomposition catalyst module from the photocatalyst function part side, and air is discharged from the ozone decomposition function part side.

  According to the air cleaning method of the present invention, since the air cleaning device including the photocatalyst-ozone decomposition catalyst module in which the photocatalyst functional part and the ozone decomposition catalyst functional part are formed on one substrate is used, the air of the air cleaning apparatus is used. It is possible to reduce the thickness in the flow path direction, and the pressure loss is also reduced.

1, 1A, 1B, 70 Air purifier 10 Photocatalyst-ozone decomposition catalyst module (ground electrode)
10A, 10B Photocatalyst-ozone decomposition catalyst module 11 Photocatalyst function unit 12 of photocatalyst-ozone decomposition catalyst module 14 Ozone decomposition function unit 14 of photocatalyst-ozone decomposition catalyst module Base 15 Photocatalyst reaction unit 16 Photocatalyst adsorbing unit 17 Ozone decomposition catalyst reaction unit 18 Ozone decomposition catalyst adjacent adsorbing part 20, 20A, 20B, 72 First electrode (high voltage electrode)
30A, 30B, 73 Second electrode (ground electrode)
31 Electrode body 32 of second electrode 32 Dielectric layers 40A, 40B of second electrode Discharge light generating electrode unit 42 Dielectric layers 50, 74 of discharge light generating electrode unit High voltage power supply (power supply unit)
51, 52, 76, 77 Conductor 60, 80 Flow path (ventilation path)
65, 65A, 65B, 66, 66A, 66B, 85, 86 Direction of air flow 71 Photocatalyst module 75 Ozone decomposition catalyst module

Claims (15)

A photocatalytic function part that performs a photocatalytic reaction is formed in an upstream portion of an integrally formed base that is disposed in a flow path through which air flows and ozonolysis is performed in a downstream portion of the base. A photocatalyst-ozone decomposition catalyst module in which an ozone decomposition function part for performing the reaction is formed;
A first electrode disposed to face the photocatalytic function part of the photocatalyst-ozone decomposition catalyst module;
A power supply unit for applying a voltage between the first electrode and the base of the photocatalyst-ozone decomposition catalyst module;
The air cleaning apparatus according to claim 1, wherein a base of the photocatalyst-ozone decomposition catalyst module has electrical conductivity. A photocatalytic function part that performs a photocatalytic reaction is formed in an upstream portion of an integrally formed base that is disposed in a flow path through which air flows and ozonolysis is performed in a downstream portion of the base. A photocatalyst-ozone decomposition catalyst module in which an ozone decomposition function part for performing the reaction is formed;
A discharge light generation electrode having a first electrode and a second electrode for generating discharge light between the first electrode and disposed opposite to the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module Unit,
An air cleaning apparatus comprising: a power supply unit that applies a voltage between a first electrode and a second electrode of the discharge light generating electrode unit. The discharge light generating electrode unit is:
A first electrode made of a conductor;
A second electrode made of a conductor and a dielectric layer covering the conductor, and spaced apart from the first electrode;
The air purifier according to claim 2, wherein The first electrode of the discharge light generating electrode unit is a cylindrical body and a plurality of spaced apart ones are arranged substantially in parallel,
The second electrode of the discharge light generating electrode unit is a cylindrical body and is arranged in parallel with a plurality of spaced apart,
The air purifier according to claim 3, wherein each of the second electrodes is disposed in a gap between the first electrodes. The discharge light generating electrode unit is:
A first electrode made of a conductor;
A second electrode made of a conductor and spaced apart from the first electrode;
A dielectric layer integrally covering the first electrode and the second electrode;
The air purifier according to claim 2, wherein 6. The air cleaning device according to claim 5, wherein the discharge light generating electrode units are prismatic and are arranged in parallel and spaced apart from each other. The air cleaning apparatus according to claim 1, wherein the base is a honeycomb structure. The air cleaning apparatus according to claim 2, wherein the base body has electrical conductivity. 3. The air according to claim 1, wherein the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module includes the base and a photocatalytic reaction part formed by supporting a photocatalyst on the surface of the base. Cleaning device. The photocatalytic function unit of the photocatalyst-ozone decomposition catalyst module further includes a photocatalyst adjacent adsorbing part formed by supporting an adsorbent that adsorbs an organic chemical substance on a part of the surface of the photocatalytic reaction part The air purifier according to claim 9. The photocatalytic function unit of the photocatalyst-ozone decomposition catalyst module includes the base, a photocatalyst adsorbing part formed by supporting an adsorbent that adsorbs an organic chemical substance on the surface of the base, and a surface of the photocatalyst adsorbing part. The air purifier according to claim 1, further comprising: a photocatalytic reaction portion formed by supporting a photocatalyst on a part of the air purification device. The ozonolysis function part of the photocatalyst-ozone decomposition catalyst module includes the base and an ozone decomposition catalyst reaction part formed by supporting an ozone decomposition catalyst on the surface of the base. 2. The air cleaning device according to 2. The ozonolysis function part of the photocatalyst-ozone decomposition catalyst module further includes an ozone decomposition catalyst adjacent adsorption part formed by supporting an adsorbent that adsorbs an organic chemical substance on a part of the surface of the ozone decomposition catalyst reaction part. The air cleaning apparatus according to claim 12, comprising: The ozonolysis function part of the photocatalyst-ozone decomposition catalyst module includes the substrate, an ozone decomposition catalyst adjacent adsorption unit formed by supporting an adsorbent that adsorbs an organic chemical substance on the surface of the substrate, and the ozone decomposition catalyst. The air purifier according to claim 1 or 2, further comprising an ozone decomposition catalyst reaction part formed by supporting ozone decomposition on a part of the surface of the adjacent adsorption part. A photocatalytic function part that performs a photocatalytic reaction is formed in an upstream portion of an integrally formed base that is disposed in a flow path through which air flows and ozonolysis is performed in a downstream portion of the base. Using an air cleaning device including a photocatalyst-ozone decomposition catalyst module in which an ozone decomposition function unit that performs reaction is formed,
While irradiating the photocatalyst function part of the photocatalyst-ozone decomposition catalyst module with discharge light, air is supplied to the photocatalyst-ozone decomposition catalyst module from the photocatalyst function part side and air is discharged from the ozone decomposition function part side. How to clean the air.

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