阅读说明：本技术 过滤器部件以及空气净化器 (Filter part and air purifier ) 是由 山田庆太郎 于 2020-03-26 设计创作，主要内容包括：过滤器部件(200)具备第一过滤器(210)和第二过滤器(220)。第一过滤器(210)吸附气味成分和/或捕获尘埃。第二过滤器(220)包含光催化剂,通过照射光来分解气味成分。第一过滤器(210)与第二过滤器(220)相对配置。第一过滤器(210)和第二过滤器(120)分别优选形成为筒状。优选在第一过滤器(210)的内侧配置第二过滤器(220)。(The filter member (200) is provided with a first filter (210) and a second filter (220). The first filter (210) adsorbs odor components and/or captures dust. The second filter (220) contains a photocatalyst, and decomposes the odor component by irradiating light. The first filter (210) and the second filter (220) are disposed opposite to each other. The first filter (210) and the second filter (120) are preferably formed in a cylindrical shape. The second filter (220) is preferably disposed inside the first filter (210).)

1. A filter member, comprising:

a first filter that adsorbs odor components and/or captures dust; and

a second filter containing a photocatalyst and decomposing the odor component by irradiating light,

the first filter and the second filter are disposed opposite to each other.

2. The filter component of claim 1,

the first filter and the second filter are respectively formed in a cylindrical shape,

the second filter is disposed inside the first filter.

3. The filter component of claim 2,

the first filter includes a chemisorption filter and a physisorption filter.

4. The filter component of claim 3,

one of the physical adsorption type filter and the chemical adsorption type filter is disposed inside the other of the physical adsorption type filter and the chemical adsorption type filter,

the second filter is disposed inside the other filter.

5. A filter member according to claim 3 or 4,

the filter member further has a holding portion that holds the chemisorption filter and the physisorption filter so as to form a gap between the chemisorption filter and the physisorption filter.

6. A filter member according to any one of claims 3 to 5,

the filter component further comprises:

a first connection member to which both end portions of the physical adsorption type filter are fixed; and

and a second connecting member to which both end portions of the chemisorption filter are fixed.

7. The filter component of claim 6,

the first connection member and the second connection member are disposed on opposite sides of a central axis of the filter member.

8. An air cleaner comprising the filter unit according to any one of claims 1 to 7, which is attachable and detachable.

Technical Field

The invention relates to a filter component and an air purifier.

Background

The air cleaning device described in patent document 1 includes a lamp, a deodorizing filter, and a fan. The lamp activates the photocatalyst. The deodorizing filter includes a photocatalyst disposed around the lamp. The fan delivers air to the deodorizing filter. The deodorizing filter is movable so that light from the lamp is irradiated to the deodorizing filter.

Documents of the prior art

Patent document

Patent document 1 Japanese patent laid-open publication No. 2009-78058

Disclosure of Invention

Technical problem to be solved by the invention

However, in general, the decomposition treatment of the odor component by the photocatalyst requires a certain time. Therefore, when only the deodorizing filter is used, if the flow of air passing through the deodorizing filter becomes fast, the decomposition process of the odor component of the photocatalyst cannot be completed, and the air purification capability may be lowered. Further, only by the decomposition treatment of the odor component, the air may not be sufficiently purified.

The invention aims to provide a filter component and an air purifier capable of improving air purification capacity.

Technical solution for solving technical problem

According to a first aspect of the present application, a filter member is provided with a first filter and a second filter. The first filter adsorbs odor components and/or captures dust. The second filter contains a photocatalyst, and decomposes the odor component by irradiating light. The first filter and the second filter are disposed opposite to each other.

According to a second aspect of the present application, an air cleaner is detachably provided with the filter member.

Advantageous effects

According to the filter component and the air purifier, the air purifying capacity can be improved.

Drawings

Fig. 1 is a perspective view of a filter member according to a first embodiment of the present invention.

Fig. 2 is a schematic view showing a filter unit.

Fig. 3 is a perspective view of a filter member according to a second embodiment of the present invention.

Fig. 4 is an IV-IV cross-sectional view of the filter element shown in fig. 3.

Fig. 5 is a cross-sectional view of a side of the filter member.

Fig. 6 is a schematic view showing a filter unit.

Fig. 7 is a diagram showing an air cleaner according to a third embodiment of the present invention.

Fig. 8 is a sectional view of the air cleaner.

Detailed Description

Embodiments of the present invention are explained with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated.

[ first embodiment ]

A filter member 100 according to a first embodiment of the present invention will be described with reference to fig. 1. Fig. 1 is a perspective view of a filter member 100 according to a first embodiment of the present invention. The filter unit 100 reduces odor components in the air.

As shown in fig. 1, the filter member 100 includes a first filter 110 and a second filter 120. The first filter 110 and the second filter 120 are configured in a layered shape.

The first filter 110 adsorbs odor components and/or captures dust. The odor component is a smelly substance causing the odor. The odor components are, for example, ammonia, methyl mercaptan, trimethylamine and/or nonenal, etc.

The first filter 110 is, for example, a chemisorption type filter containing a chemisorption agent. The chemisorbent agent comprises, for example, at least one of zinc oxide, tannic acid, plant extract components, and platinum nanoparticles.

The first filter 110 may be a physical adsorption filter containing a physical adsorbent. The physical adsorbent contains, for example, at least one of silica gel, activated carbon, activated alumina, zeolite, porous silica, and a metal complex porous body.

The first filter 110 may be a dust collecting filter that filters dust in the air to be captured. The dust collecting filter includes a mesh filter such as a HEPA filter and an ULPA filter, for example.

The first filter 110 may have a structure of at least 2 filters among a physical adsorption type filter, a chemical adsorption type filter, and a dust collection filter.

The second filter 120 is a photocatalyst filter. The photocatalyst filter contains a photocatalyst such as titanium dioxide.

The first filter 110 and the second filter 120 are each formed in a substantially plate shape. The first filter 110 is disposed opposite to the second filter 120. The first filter 110 and the second filter 120 are fixed to each other. As a result, the first filter 110 and the second filter 120 are integrally formed.

Further, by fixing the first filter 110 and the second filter 120 to each other, the second filter 120 is located at a predetermined position with respect to the first filter 110.

The structure for fixing the first filter 110 and the second filter 120 to each other is not particularly limited. For example, the first filter 110 and the second filter 120 may be fixed to each other using an adhesive. The first filter 110 and the second filter 120 may be fixed to each other using a member corresponding to a holder 230 (see fig. 3) described later.

The first filter 110 is in contact with the second filter 120. In addition, a gap may exist between the first filter 110 and the second filter 120.

The first filter 110 has a first face 111. The first face 111 is a face of the first filter 110 that is opposite to the second filter 120. The second filter 120 has a second face 121. The second face 121 is a face of the second filter 120 that is opposite to the first filter 110.

Next, the filter unit X will be described with reference to fig. 2. Fig. 2 is a schematic view showing the filter unit X. The filter unit X is a unit for operating the filter member 100.

As shown in fig. 2, the filter unit X includes a light source 4, an air blower 6, and a filter member 100.

The Light source 4 includes, for example, an LED (Light Emitting Diode). The light source 4 irradiates light to the second filter 120. In the first embodiment, the light source 4 irradiates light to the second surface 121 of the second filter 120.

The light source 4 irradiates the second filter 120 with light, and thereby the photocatalyst contained in the second filter 120 generates a catalytic action. As a result, the odor component contained in the air passing through the second filter 120 is decomposed by the catalytic action of the photocatalyst. Instead of the light from the light source 4, the second filter 120 may be irradiated with sunlight.

The air blowing unit 6 includes a fan, for example. The blower 6 generates an air passage 61. The air path 61 indicates a path of air flow. The air passage 61 is formed to pass through the first filter 110 and the second filter 120. In the first embodiment, the second filter 120 is disposed downstream of the first filter 110.

The blower 6 operates to cause air to flow along the air passage 61. In the first embodiment, the operation of the air blowing unit 6 means that a fan included in the air blowing unit 6 is rotated.

The air flowing through the air duct 61 passes through the first filter 110 and the second filter 120 in this order of the first filter 110 and the second filter 120.

When the first filter 110 is an adsorption type filter that adsorbs odor components, such as a chemical adsorption type filter and/or a physical adsorption type filter, the odor components in the air that has passed through the first filter 110 and the second filter 120 are removed (adsorbed) by the first filter 110. Then, the odor components that are not completely removed by the first filter 110 are decomposed by the photocatalyst of the second filter 120. As a result, the odor component in the air is removed not only by the second filter 120 (photocatalyst filter) but also by the first filter 110 (chemical adsorption type filter and/or physical adsorption type filter), and thus the air purification capability can be improved.

Further, by disposing the second filter 120 downstream of the first filter 110, even in the case where the odor component adsorbed to the first filter 110 is desorbed from the first filter 110, the odor component desorbed from the first filter 110 can be decomposed by the photocatalyst of the second filter 120. As a result, the occurrence of the secondary odor can be suppressed. The problem of secondary malodor indicates that odor components adsorbed to the first filter 110 are released downstream of the first filter 110 by being desorbed from the first filter 110, thereby generating malodor downstream of the first filter 110.

In addition, the second filter 120 decomposes the odor component by the photocatalyst, and thus, the problem of secondary odor generation is difficult to occur. As a result, the second filter 120 including the photocatalyst is disposed downstream of the first filter 110, which is an adsorption type filter for the odor component, so that the odor component in the air can be effectively reduced.

In the case where the first filter 110 is a dust collecting filter, the air passing through the first filter 110 and the second filter 120 reduces dust in the air by the first filter 110, and thereafter, reduces odor components in the air by the photocatalyst of the second filter 120. As a result, not only the decomposition treatment of the odor component but also the dust collection treatment can be performed, and therefore, the air purification capability can be improved.

[ second embodiment ]

A filter member 200 according to a second embodiment of the present invention will be described with reference to fig. 3 to 5. Fig. 3 is a perspective view of a filter member 200 according to a second embodiment of the present invention. Fig. 4 is an IV-IV cross-sectional view of the filter element 200 shown in fig. 3. Fig. 5 is a cross-sectional view of the side of the filter member 200. The filter part 200 reduces the odor components in the air.

As shown in fig. 3 to 5, the filter member 200 includes a first filter 210 and a second filter 220. The first filter 210 and the second filter 220 are configured in a layer shape.

The first filter 210 and the second filter 220 are respectively formed in a cylindrical shape.

The first filter 210 includes a physisorption type filter 211 and a chemisorption type filter 212.

The second filter 220 is a photocatalyst filter containing a photocatalyst. The structure of the second filter 220 (photocatalyst filter) is not particularly limited. The second filter 220 may be, for example, a nonwoven fabric supporting a photocatalyst. The second filter 220 may be formed by supporting a photocatalyst on the surface of a metal mesh. The second filter 220 may be a honeycomb filter formed by supporting a photocatalyst on paper.

The second filter 220 has a first opening 221 and a second opening 222. The first opening 221 and the second opening 222 are disposed at an interval along the axial direction L1 of the filter member 200, and face the axial direction L1. The axial direction L1 is the extending direction of the central axis L of the filter member 200. The central axis L of the filter member 200 is an imaginary line passing through the centers of the first opening 221 and the second opening 222.

The first opening 221 and the second opening 222 communicate with the inside M and the outside of the second filter 220, respectively. The interior M of the second filter 220 is a space surrounded by the inner surface 223 of the second filter 220. The inner surface 223 of the second filter 220 is a surface of the second filter 220 facing the central axis L.

The positional relationship between the first filter 210 and the second filter 220 will be described.

The first filter 210 (the physical adsorption filter 211 and the chemical adsorption filter 212) and the second filter 220 are cylindrical members having both ends opened in the axial direction L1. Second filter 220 is disposed inside first filter 210. Specifically, the chemisorption filter 212 is disposed inside the physisorption filter 211. The second filter 220 is disposed inside the chemisorption filter 212. The second filter 220 is fixed to the inner surface 212b of the chemisorption filter 212. The inner surface 212b is a surface of the chemisorption filter 212 facing the center axis L.

The second filter 220 further includes a pair of holding portions 230.

The pair of holding portions 230 are arranged at intervals along the axial direction L1. Hereinafter, the holding portion 230 located at the side L11 in the axial direction L1 of the pair of holding portions 230 may be referred to as a holding portion 230A. The holding portion 230 located on the other side L12 in the axial direction L1 of the pair of holding portions 230 may be referred to as a holding portion 230B.

The holding unit 230 holds the chemisorption filter 212 and the physisorption filter 211 so that the physisorption filter 211 is located at a fixed position with respect to the chemisorption filter 212.

The holding unit 230 holds the chemisorption filter 212 and the physisorption filter 211 so as to form a gap N between the chemisorption filter 212 and the physisorption filter 211.

The holding portion 230 is a substantially annular member. The holding portion 230 is formed of, for example, resin.

A first groove 231 and a second groove 232 are formed in the holding portion 230. The first groove 231 and the second groove 232 each have a shape that recesses the outer surface of the holding portion 230. The first groove 231 and the second groove 232 each extend substantially annularly. The second groove 232 is disposed inside the first groove 231.

The end of the physical adsorption filter 211 in the axial direction L1 is inserted into the first groove 231. The end of the chemisorption filter 212 in the axial direction L1 is inserted into the second groove 232. The position of the physisorption type filter 211 with respect to the chemisorption type filter 212 is maintained at a fixed position by inserting the end of the physisorption type filter 211 and the end of the chemisorption type filter 212 into the first groove 231 and the second groove 232, respectively.

The first groove 231 and the second groove 232 are arranged at a distance from each other. As a result, a gap N is formed between the chemisorption filter 212 and the physisorption filter 211.

By forming the holding portion 230 in a substantially annular shape, a space 233 is formed inside the holding portion 230.

The empty space 233 of the holding portion 230A faces the first opening 221, and communicates with the interior M of the second filter 220 via the first opening 221. The empty space 233 of the holding portion 230B faces the second opening 222, and communicates with the inside M of the second filter 220 via the second opening 222.

The filter member 200 is further provided with a first connection member 240 and a second connection member 250.

The first connecting member 240 is a substantially rod-shaped member. The first connection part 240 is formed of, for example, resin, metal, or thick paper. The first connecting member 240 has a shape extending in the axial direction L1. The first connection part 240 is provided from an end of one side L11 to an end of the other side L12 in the axial direction L1 of the physical adsorption type filter 211. Both end portions 211b of the physical adsorption type filter 211 are fixed to the first connection part 240. The two end portions 211b represent the two end portions in the axial direction L2 of the central axis L of the physical adsorption filter 211. The strength (bending strength) of the first connection member 240 is greater than that of the physical adsorption type filter 211. As a result, the first connection member 240 can suppress deformation of the physical adsorption type filter 211, and can maintain the shape of the physical adsorption type filter 211. The first connecting member 240 is particularly effective in suppressing deformation of the physical adsorption type filter 211 in the axial direction L1.

The second link member 250 is a substantially rod-shaped member. The second connection member 250 is formed of, for example, resin, metal, or thick paper. The second connection member 250 has a shape extending along the axial direction L1. The second connecting member 250 is provided so as to straddle from an end of one side L11 to an end of the other side L12 in the axial direction L1 of the chemisorption filter 212. Both end portions 212a of the chemisorption filter 212 are fixed to the second connection member 250. The two end portions 212a represent the two end portions in the axial direction L2 of the central axis L in the chemisorption filter 212. The strength of the second coupling member 250 is greater than that of the chemisorption filter 212. As a result, the second connection member 250 can suppress deformation of the chemisorption filter 212 and can maintain the shape of the chemisorption filter 212. The second connecting member 250 can particularly effectively suppress deformation of the chemisorption filter 212 in the axial direction L1.

The first connection member 240 and the second connection member 250 are arranged so as not to overlap with each other (not to face each other) with the center axis L of the filter member 200 interposed therebetween. That is, the rotation angle of the first link member 240 about the shaft direction L2 and the rotation angle of the second link member 250 about the shaft direction L2 are different from each other. In the second embodiment, the first connection member 240 and the second connection member 250 are disposed on opposite sides of each other with respect to the central axis L of the filter member 200. That is, the rotation angle of the first link member 240 in the axial direction L2 is substantially different from the rotation angle of the second link member 250 in the axial direction L2 by 180 °. As a result, the first and second connection members 240 and 250 support the filter member 200 from opposite sides with respect to the central axis L, respectively, and therefore, the filter member 200 can be stably supported.

Next, the filter unit Y will be described with reference to fig. 6. Fig. 6 is a schematic view showing the filter unit Y. The filter unit Y is a unit for operating the filter member 200.

As shown in fig. 6, the filter unit X includes a light source 4, an air blower 6, and a filter member 200.

The light source 4 is disposed outside the second filter 220. The light source 4 is disposed on the other side L12 in the axial direction L1 with respect to the second filter 220. The light source 4 irradiates the light to the inside M of the second filter 220 through the second opening 222. Specifically, the light source 4 irradiates the inside M of the second filter 220 with light via the void 233 of the holding portion 230B and the second opening 222. Therefore, the light from the light source 4 is irradiated onto the inner surface 223 of the second filter 220, and thus the photocatalyst of the second filter 220 generates a catalytic action. As a result, the odor component in the air passing through the second filter 220 is decomposed. Instead of the light from the light source 4, sunlight may be irradiated to the second filter 220.

The blower 6 is disposed outside the second filter 220. The blower 6 is disposed on one side L11 in the axial direction L1 with respect to the second filter 220. The blower 6 generates an air passage 62. The air path 62 indicates a path of air flow. The air passage 62 is formed to pass through the physical adsorption filter 211, the chemical adsorption filter 212, and the second filter 220. In the second embodiment, the chemisorption filter 212 is disposed downstream of the physisorption filter 211, and the second filter 220 is disposed downstream of the chemisorption filter 212.

The operation of the blower 6 causes air to flow along the air passage 62. The air flowing through the air duct 62 passes through the physisorption type filter 211, the chemisorption type filter 212, and the second filter 220 in this order from the outside of the physisorption type filter 211 to the outside of the physisorption type filter 211, and then flows into the inside M of the second filter 220 after passing through the physisorption type filter 211, the chemisorption type filter 212, and the second filter 220. Then, the air flowing into the interior M of the filter member 200 is discharged from the interior M of the second filter 220 through the first opening 221. As a result, the air in which the odor component is reduced by the physical adsorption filter 211, the chemical adsorption filter 212, and the second filter 220 can be discharged from the inside M of the second filter 220.

Further, by using a 2-layer filter composed of the physisorption filter 211 and the chemisorption filter 212, the adsorption efficiency of the odor components to the physisorption filter 211 and the chemisorption filter 212 can be improved.

Further, a gap N is formed between the physisorption filter 211 and the chemisorption filter 212. Therefore, when the air flows into the interior M of the second filter 220 through the physisorption type filter 211 and the chemisorption type filter 212, the pressure loss to the air can be suppressed as compared with the case where the gap N does not exist between the physisorption type filter 211 and the chemisorption type filter 212. As a result, air can be efficiently flowed into the interior M.

Further, the gap N may not be present between the physisorption filter 211 and the chemisorption filter 212. In this case, the filter member 200 can be formed compactly.

In the second embodiment, the light source 4 is disposed outside the second filter 220. However, the light source 4 may be disposed inside the second filter 220. As a result, the filter member 200 can be formed compactly. Further, when the light source 4 is disposed outside the second filter 220 as in the second embodiment, interference between the light source 4 and the air flowing through the air passage 62 is suppressed, and therefore, it is advantageous in that the air can smoothly flow into the interior M of the second filter 220.

[ third embodiment ]

An air cleaner 300 according to a third embodiment of the present invention will be described with reference to fig. 7 and 8. Fig. 7 is a diagram showing an air cleaner 300 according to a third embodiment of the present invention. Fig. 8 is a cross-sectional view of air purifier 300.

As shown in fig. 7 and 8, air cleaner 300 includes a housing 1. The housing 1 is a hollow member formed of resin, for example.

The housing 1 includes a first housing 10 and a second housing 20. The second casing 20 is detachably attached to the first casing 10. The second housing 20 is located outside the first housing 10. By mounting the second casing 20 to the first casing 10, a part of the first casing 10 is covered with the second casing 20. In addition, the first casing 10 and the second casing 20 may be an integral component.

The housing 1 further comprises a handle portion 3. The grip portion 3 has a shape in which a part of the outer surface of the housing 1 is recessed. The user holds the grip portion 3 to carry the air cleaner 300.

An air inlet a is formed in the casing 1. The air inlet a communicates the inside of the casing 1 with the outside. The air inlet a is formed in the lower portion of the casing 1.

The casing 1 also has an outlet B. The outlet B communicates the inside of the casing 1 with the outside. The outlet B is formed in the upper portion of the casing 1.

Air cleaner 300 further includes filter unit Y. The filter unit Y is disposed inside the housing 1. A filter member 200 is detachably attached to the housing 1.

Air cleaner 300 further includes a rectifying unit 7 and a louver 8.

The rectifying unit 7 guides the air sent out by the blowing unit 6. The rectifying unit 7 is disposed downstream of the blowing unit 6. The rectifying portion 7 is fixed to the case 1.

The louver 8 guides the wind flowing from the rectifying portion 7. The louver 8 is a substantially plate-like member. The louver 8 is disposed downstream of the rectifying portion 7. The louver 8 is disposed in front of the outlet B.

The louver 8 is rotatably mounted to the housing 1. The louver 8 is rotatably supported by the housing 1.

By changing the rotation angle of the louver 8 with respect to the casing 1, the discharge direction H of the air discharged from the outlet B is changed.

The air cleaner 300 further includes an ion supply unit 9. The ion supply unit 9 is disposed between the air blowing unit 6 and the rectifying unit 7. The ion supply unit 9 supplies ions to the air. As a result, air containing ions is discharged from the air outlet B. The ions include at least one of positive ions and negative ions.

Air cleaner 300 further includes storage unit S1 and control unit S2.

The storage unit S1 includes a main storage device (e.g., a semiconductor memory) such as a rom (read Only memory) and a ram (random Access memory), and may further include an auxiliary storage device (e.g., a hard disk drive). The main storage device and/or the auxiliary storage device stores various computer programs executed by the control section S2.

The control unit S2 includes processors such as a cpu (central Processing unit) and an mpu (micro Processing unit). The control unit S2 controls each element of the air cleaner 300.

Referring to fig. 8, the flow of air inside the casing 1 will be described.

As shown in fig. 8, the air blowing unit 6 operates to flow air from outside the casing 1 into the casing 1 through the air inlet a. The air flowing into the interior of the housing 1 flows into the interior M of the second filter 220 through the physisorption type filter 211, the chemisorption type filter 212, and the second filter 220 containing the photocatalyst. At this time, the light source 4 irradiates the second filter 220 with light, thereby generating a catalytic action of the photocatalyst. Accordingly, the odor component in the air is adsorbed by the physisorption type filter 211 and the chemisorption type filter 212, and the odor component in the air is decomposed by the second filter 220. As a result, the odor component in the air is reduced.

The air passing through the second filter 220 passes through the ion supplier 9. As a result, ions are supplied to the air.

The air having passed through the ion supply unit 9 is guided by the louver 8 after passing through the rectifying unit 7, and is discharged from the outlet B to the outside of the housing 1. As a result, the air purified by air purifier 300 is supplied to the room.

The embodiments of the present invention have been described above with reference to the drawings (fig. 1 to 8). However, the present invention is not limited to the above-described embodiments, and can be implemented in various ways (for example, (1) to (7)) without departing from the scope of the invention. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some of the components may be deleted from all the components shown in the embodiments. For convenience of understanding, the drawings are schematically illustrated mainly for the respective components, and the number of the illustrated components may be different from the actual number due to convenience of manufacturing the drawings. The constituent elements shown in the above-described embodiments are examples, and are not particularly limited, and various modifications can be made without substantially departing from the effects of the present invention.

(1) In the first embodiment, as shown in fig. 3, the second filter 120 is disposed downstream of the first filter 110. However, the present invention is not limited thereto. A second filter 120 may also be disposed upstream of the first filter 110. In this case, after the air passing through the first filter 110 and the second filter 120 is purified by the second filter 120, a portion not purified by the second filter 120 is purified by the first filter 110. As a result, since the first filter 110 is used secondarily, the product life of the first filter 110 can be extended.

In the second and third embodiments, the second filter 220 may be disposed upstream of the first filter 210. That is, the first filter 210 may be disposed inside the second filter 220.

(2) As shown in fig. 3, each of the filter members 200 (the first filter 210 and the second filter 220) is formed in a substantially cylindrical shape and has a vertically symmetrical shape. Therefore, when the filter member 200 is mounted in a product such as the air cleaner 300 (see fig. 7 and 8) and used, the filter member 200 can be used in a vertically reversed manner depending on the use time of the filter member 200. As a result, local consumption of the filter member 200 can be suppressed, and a high air purification capacity can be maintained for a long time. For example, the filter member 200 can be used effectively by reversing the up and down directions of the filter member 200 depending on the time of use of the filter member 200 when the upper portion (the side closer to the air blowing unit 6) of the filter member 200 is easily contaminated and the lower portion (the side farther from the air blowing unit 6) of the filter member 200 is hardly contaminated due to the positional relationship between the air blowing unit 6 and the filter member 200, and when there are a portion easily contaminated and a portion hardly contaminated in the filter member 200.

(3) In the filter member 200 shown in fig. 3, a mark may be provided on the outer surface of the filter member 200 and a housing portion for housing the filter member 200 in a product. As a result, when the filter member 200 is attached to and used in the housing portion of the product, the filter member 200 is rotated little by little in accordance with the use time based on the mark, and thereby the local consumption of the filter member 200 can be suppressed.

(4) In the second and third embodiments, the first filter 210 (the physical adsorption filter 211 and the chemical adsorption filter 212) and the second filter 220 are respectively formed in a cylindrical shape. However, the present invention is not limited thereto. The first filter 210 and the second filter 220 may be respectively formed in a polygonal cylindrical shape. The polygonal cylinder is a shape in which the shape of the edge portion of a cross section perpendicular to the central axis L (see fig. 4) is polygonal in each of the first filter 210 and the second filter 220. The cylindrical shape and the polygonal cylindrical shape are examples of the cylindrical shape of the present invention.

(5) In the second and third embodiments, the chemisorption filter 212 is disposed inside the physisorption filter 211. That is, the chemisorption filter 212 is disposed downstream of the physisorption filter 211. As a result, since the adhesion of dust to the chemisorption filter 212 is suppressed, the function of the chemisorption filter 212 (the function of reducing odor components) can be effectively maintained. However, the present invention is not limited thereto.

The physisorption filter 211 may be disposed inside the chemisorption filter 212. That is, the physisorption type filter 211 may be disposed downstream of the chemisorption type filter 212. In general, the physisorption filter 211 adsorbs a larger number of odor components than the chemisorption filter 212, and a secondary odor problem is likely to occur. However, by disposing the physisorption type filter 211 downstream of the chemisorption type filter 212, the second filter 120 is located immediately downstream of the physisorption type filter 211, and therefore, the photocatalyst passing through the second filter 220 can effectively suppress secondary odor generation.

(6) In the second and third embodiments, the first filter 210 includes a physisorption filter 211 and a chemisorption filter 212. However, the present invention is not limited thereto. The first filter 210 may include at least one of a physical adsorption filter 211, a chemical adsorption filter 212, and a cylindrical dust collection filter. In the case where the first filter 210 is composed of any one of the physical adsorption filter 211, the chemical adsorption filter 212, and the cylindrical dust collection filter, the holding part 230 may not be provided. As a result, the number of components of the filter member 200 can be reduced. When the first filter 210 includes two or more filters selected from the physical adsorption filter 211, the chemical adsorption filter 212, and the cylindrical dust collection filter, the order of arranging the two or more filters from the upstream to the downstream is not particularly limited.

(7) In the first embodiment, two first filters 110 may be used, and the second filter 120 may be disposed between the two first filters 110. In this case, for example, one of the two first filters 110 is a physical adsorption type filter, and the other of the two first filters 110 is a chemical adsorption type filter.

In general, the photocatalyst is easily peeled off from the filter main body when an external force is applied. However, the second filter 120 is disposed between the two first filters 110, so that the second filter 120 is covered by the two first filters 110. Therefore, the photocatalyst contained in the second filter 120 can be protected by the two first filters 110 so as not to apply an external force to the photocatalyst contained in the second filter 120. As a result, the photocatalyst peeling can be suppressed.

In the second and third embodiments, the second filter 220 including the photocatalyst may be disposed between the chemisorption filter 212 and the physisorption filter 211.

Industrial applicability

The present invention can be used in the field of air purifiers and air purifiers.

Description of the reference numerals

100. 200: filter element

110. 210: first filter

120. 220, and (2) a step of: second filter

300: air purifier