WO2020196772A1 - Filter member and air purifier - Google Patents

Abstract

A filter member (200) comprises 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 way of light being irradiated. The first filter (210) is disposed opposite to the second filter (220). The first filter (210) and the second filter (220) are each preferably shaped in a cylinder. The second filter (220) is preferably disposed inside the first filter (210).

Description

Filter members and air purifiers

The present invention relates to a filter member and an air purifier.

The air purifying 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 placed around the lamp. The fan sends air to the deodorizing filter. The deodorizing filter moves so that the light from the lamp hits the deodorizing filter.

JP-A-2009-78058

However, in general, it takes some time to decompose the odorous component by the photocatalyst. Therefore, when only the deodorizing filter is used, if the flow of air through the deodorizing filter becomes fast, the decomposition treatment of the odorous component by the photocatalyst cannot catch up, and the air purification ability may decrease. In addition, it may not be possible to sufficiently purify the air only by decomposing the odorous component.

An object of the present invention is to provide a filter member capable of improving the air purification ability and an air purifier.

According to the first aspect of the present application, the filter member includes a first filter and a second filter. The first filter adsorbs odorous components and / or captures dust. The second filter contains a photocatalyst and decomposes the odorous component when irradiated with light. The first filter is arranged to face the second filter.

According to the second aspect of the present application, the air purifier is provided with the filter member detachably attached.

According to the filter member of the present invention and the air purifier, the air purification ability can be improved.

It is a perspective view of the filter member which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the filter unit. It is a perspective view of the filter member which concerns on 2nd Embodiment of this invention. FIG. 3 is a sectional view taken along line IV-IV of the filter member shown in FIG. It is sectional drawing of the side surface of a filter member. It is a schematic diagram which shows the filter unit. It is a figure which shows the air purifier which concerns on 3rd Embodiment of this invention. It is sectional drawing of an air purifier.

An embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and the description is not repeated.

[First Embodiment]
The filter member 100 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of the filter member 100 according to the first embodiment of the present invention. The filter member 100 reduces the odor component 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 arranged in layers.

The first filter 110 adsorbs odorous components and / or captures dust. The odorous component is an odorous substance that causes an odor. The odorous component is, for example, ammonia, methyl mercaptan, trimethylamine, and / or nonenal and the like.

The first filter 110 is, for example, a chemisorption type filter containing a chemisorbent. Chemisorbents include, for example, zinc oxide, tannic acid, plant extracts, and at least one of platinum nanoparticles.

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

Further, the first filter 110 may be a dust collecting filter that captures dust in the air by filtering it. The dust collecting filter includes, for example, a HEPA filter and a net-like filter medium such as a ULPA filter.

Further, the first filter 110 may have a structure of at least two of a physical adsorption type filter, a chemical adsorption type filter, and a dust collection filter.

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

Each of the first filter 110 and the second filter 120 is formed in a substantially plate shape. The first filter 110 is arranged to face 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 configured.

Further, since the first filter 110 and the second filter 120 are fixed to each other, the second filter 120 is positioned at a fixed position with respect to the first filter 110.

The configuration 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 by using an adhesive. Further, the first filter 110 and the second filter 120 may be fixed to each other by using a member corresponding to the holding portion 230 (see FIG. 3) described later.

The first filter 110 comes into contact with the second filter 120. There may be a gap between the first filter 110 and the second filter 120.

The first filter 110 has a first surface 111. The first surface 111 is a surface of the first filter 110 that faces the second filter 120. The second filter 120 has a second surface 121. The second surface 121 is a surface of the second filter 120 that faces the first filter 110.

Next, the filter unit X will be described with reference to FIG. 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, a blower unit 6, and a filter member 100.

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

When the light source 4 irradiates the second filter 120 with light, the photocatalyst contained in the second filter 120 produces a catalytic action. As a result, the odorous component contained in the air passing through the second filter 120 is decomposed by the catalytic action of the photocatalyst. The second filter 120 may be irradiated with sunlight instead of the light of the light source 4.

The blower unit 6 includes, for example, a fan. The blower unit 6 creates an air passage 61. The air passage 61 indicates a path through which air flows. The air passage 61 is formed so as to pass through the first filter 110 and the second filter 120. In the first embodiment, the second filter 120 is arranged downstream of the first filter 110.

By operating the blower unit 6, air flows along the air passage 61. In the first embodiment, the operation of the blower unit 6 indicates that the fan included in the blower unit 6 rotates.

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

When the first filter 110 is a chemisorption type filter and / or an adsorption type filter that adsorbs an odor component such as a physical adsorption type filter, the odor component in the air passing through the first filter 110 and the second filter 120. Is removed (adsorbed) by the first filter 110. Then, the odorous component that cannot be completely removed by the first filter 110 is decomposed by the photocatalyst of the second filter 120. As a result, not only the second filter 120 (photocatalytic filter) but also the first filter 110 (chemical adsorption type filter and / or physical adsorption type filter) removes odorous components in the air, so that the air is purified. You can improve your ability.

Further, by arranging the second filter 120 downstream of the first filter 110, even if the odor component adsorbed on the first filter 110 is separated from the first filter 110, it is separated from the first filter 110. The odorous component can be decomposed by the photocatalyst of the second filter 120. As a result, it is possible to suppress the problem of secondary odor. The problem of secondary odor is that the odorous component adsorbed on the first filter 110 is separated from the first filter 110 and released downstream of the first filter 110, so that the odor is generated downstream of the first filter 110. Indicates that it will occur.

Further, since the second filter 120 decomposes odorous components by a photocatalyst, the problem of secondary odor is less likely to occur. As a result, by arranging the second filter 120 containing the photocatalyst downstream of the first filter 110, which is an adsorption type filter for odorous components, the odorous components in the air can be effectively reduced.

When the first filter 110 is a dust collecting filter, the air passing through the first filter 110 and the second filter 120 is in the air by the photocatalyst of the second filter 120 after the dust in the air is reduced by the first filter 110. The odor component of is reduced. As a result, not only the decomposition treatment of the odorous component but also the dust collection treatment can be performed, so that the air purification ability can be improved.

[Second Embodiment]
The filter member 200 according to the second embodiment of the present invention will be described with reference to FIGS. 3 to 5. FIG. 3 is a perspective view of the filter member 200 according to the second embodiment of the present invention. FIG. 4 is an IV-IV cross-sectional view of the filter member 200 shown in FIG. FIG. 5 is a cross-sectional view of the side surface of the filter member 200. The filter member 200 reduces the odor component in the air.

As shown in FIGS. 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 arranged in layers.

Each of the first filter 210 and the second filter 220 is formed in a cylindrical shape.

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

The second filter 220 is a photocatalyst filter containing a photocatalyst. The configuration of the second filter 220 (photocatalyst filter) is not particularly limited. The second filter 220 may be, for example, a non-woven fabric on which a photocatalyst is supported. Further, the second filter 220 may have a photocatalyst supported on the surface of a metal mesh. Further, the second filter 220 may be formed in a honeycomb shape by supporting a photocatalyst on paper.

The second filter 220 is formed with a first opening 221 and a second opening 222. The first opening 221 and the second opening 222 are arranged at intervals along the axial direction L1 of the filter member 200, and face the axial direction L1. The axial direction L1 is the direction in which the central axis L of the filter member 200 extends. The central axis L of the filter member 200 is a virtual line passing through the center of the first opening 221 and the center of the second opening 222.

Each of the first opening 221 and the second opening 222 communicates with the inside M of the second filter 220 and the outside. 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 side.

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

Each of the first filter 210 (physisorption type filter 211 and chemisorption type filter 212) and the second filter 220 are tubular members with both ends open in the axial direction L1. A second filter 220 is arranged inside the first filter 210. Specifically, the chemisorption type filter 212 is arranged inside the physical adsorption type filter 211. A second filter 220 is arranged inside the chemisorption type filter 212. The second filter 220 is fixed to the inner surface 212b of the chemisorption type filter 212. The inner surface 212b is a surface of the chemisorption type filter 212 facing the central axis L side.

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

The pair of holding portions 230 are arranged so as to be spaced apart from each other along the axial direction L1. In the following, the holding portion 230 located on one side L11 of the axial direction L1 of the pair of holding portions 230 may be referred to as the holding portion 230A. Further, of the pair of holding portions 230, the holding portion 230 located on the other side L12 in the axial direction L1 may be referred to as the holding portion 230B.

The holding unit 230 holds the chemical adsorption type filter 212 and the physical adsorption type filter 211 so that the physical adsorption type filter 211 is located at a fixed position with respect to the chemical adsorption type filter 212. Further, the holding portion 230 holds the chemisorption type filter 212 and the physical adsorption type filter 211 so that a gap N is formed between the chemisorption type filter 212 and the physical adsorption type filter 211.

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

A first groove 231 and a second groove 232 are formed in the holding portion 230. Each of the first groove 231 and the second groove 232 has a shape in which the outer surface of the holding portion 230 is recessed. Each of the first groove 231 and the second groove 232 extends substantially in an annular shape. The second groove 232 is arranged inside the first groove 231.

The end of the physical adsorption type filter 211 in the axial direction L1 is inserted into the first groove 231. The end of the chemisorption type filter 212 in the axial direction L1 is inserted into the second groove 232. By inserting the end portion of the physical adsorption type filter 211 and the end portion of the chemisorption type filter 212 into the first groove 231 and the second groove 232, respectively, the physical adsorption type filter 211 with respect to the chemisorption type filter 212 is inserted. The position of is held in place.

Further, the first groove 231 and the second groove 232 are arranged at intervals from each other. As a result, a gap N is formed between the chemisorption type filter 212 and the physical adsorption type filter 211.

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

The vacant space 233 of the holding portion 230A faces the first opening 221 and communicates with the internal M of the second filter 220 via the first opening 221. The vacant space 233 of the holding portion 230B faces the second opening 222 and communicates with the inner M of the second filter 220 via the second opening 222.

The filter member 200 further includes a first joining member 240 and a second joining member 250.

The first joining member 240 is a substantially rod-shaped member. The first joining member 240 is formed of, for example, resin, metal, or thick paper. The first joining member 240 has a shape extending along the axial direction L1. The first joining member 240 is provided from the end of one side L11 of the physical adsorption type filter 211 in the axial direction L1 to the end of the other side L12. Both ends 211b of the physical adsorption type filter 211 are fixed to the first joining member 240. Both end portions 211b indicate both end portions of the physical adsorption type filter 211 in the axial direction L2 of the central axis L. The strength (flexural strength) of the first joining member 240 is larger than the strength of the physical adsorption type filter 211. As a result, the first joining member 240 can suppress the deformation of the physical adsorption type filter 211 and can maintain the shape of the physical adsorption type filter 211. In particular, the first joining member 240 can effectively suppress deformation of the physical adsorption type filter 211 in the axial direction L1.

The second joining member 250 is a substantially rod-shaped member. The second joining member 250 is formed of, for example, resin, metal, or thick paper. The second joining member 250 has a shape extending along the axial direction L1. The second joining member 250 is provided from the end of one side L11 of the chemisorption type filter 212 in the axial direction L1 to the end of the other side L12. Both ends 212a of the chemisorption type filter 212 are fixed to the second joining member 250. Both end portions 212a indicate both end portions of the chemisorption type filter 212 in the axial direction L2 of the central axis L. The strength of the second joining member 250 is higher than the strength of the chemisorption type filter 212. As a result, the second joining member 250 can suppress the deformation of the chemisorption type filter 212 and can maintain the shape of the chemisorption type filter 212. In particular, the second joining member 250 can effectively suppress deformation of the chemisorption type filter 212 in the axial direction L1.

The first joining member 240 and the second joining member 250 are arranged so as not to overlap (do not face each other) with each other via the central axis L of the filter member 200. That is, the rotation angle of the first joining member 240 in the axial direction L2 and the rotation angle of the second joining member 250 in the axial direction L2 are different from each other. In the second embodiment, the first joining member 240 and the second joining member 250 are arranged on opposite sides of the central axis L of the filter member 200. That is, the rotation angle of the first joining member 240 in the axial direction L2 and the rotation angle of the second joining member 250 in the axial direction L2 are substantially 180 ° different. As a result, since the first joining member 240 and the second joining member 250 each support the filter member 200 from opposite sides to the central axis L, the filter member 200 can be stably supported.

Next, the filter unit Y will be described with reference to FIG. 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, a blower unit 6, and a filter member 200.

The light source 4 is arranged outside the second filter 220. The light source 4 is arranged on the other side L12 in the axial direction L1 with respect to the second filter 220. The light source 4 irradiates the internal M of the second filter 220 with light through the second opening 222. Specifically, the light source 4 irradiates the internal M of the second filter 220 with light via the empty space 233 of the holding portion 230B and the second opening 222. Therefore, since the light from the light source 4 hits the inner surface 223 of the second filter 220, the photocatalyst of the second filter 220 produces a catalytic action. As a result, the odorous component in the air passing through the second filter 220 is decomposed. The second filter 220 may be irradiated with sunlight instead of the light of the light source 4.

The blower portion 6 is arranged outside the second filter 220. The blower portion 6 is arranged on one side L11 of the axial direction L1 with respect to the second filter 220. The blower unit 6 creates an air passage 62. The air passage 62 indicates a path through which air flows. The air passage 62 is formed so as to pass through the physical adsorption type filter 211, the chemical adsorption type filter 212, and the second filter 220. In the second embodiment, the chemisorption type filter 212 is arranged downstream of the physical adsorption type filter 211, and the second filter 220 is arranged downstream of the chemisorption type filter 212.

By operating the blower unit 6, air flows along the air passage 62. The air flowing through the air passage 62 is the physical adsorption type filter 211, the chemical adsorption type filter 212, and the second filter 220 in this order from the outside of the physical adsorption type filter 211, and the chemical adsorption type filter 212. After passing through the second filter 220, the air flows into the internal M of the second filter 220. Then, the air that has flowed 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 whose odor component is reduced by the physical adsorption type filter 211, the chemical adsorption type filter 212, and the second filter 220 can be discharged from the inside M of the second filter 220.

Further, by using a two-layer filter composed of a physical adsorption type filter 211 and a chemical adsorption type filter 212, the adsorption efficiency of odorous components for each of the physical adsorption type filter 211 and the chemical adsorption type filter 212 can be improved. Can be done.

Further, a gap N is formed between the physical adsorption type filter 211 and the chemical adsorption type filter 212. Therefore, when air passes through the physical adsorption type filter 211 and the chemical adsorption type filter 212 and flows into the internal M of the second filter 220, a gap N exists between the physical adsorption type filter 211 and the chemical adsorption type filter 212. It is possible to suppress the pressure loss that occurs in the air as compared with the case where it is not used. As a result, air can be effectively flowed into the interior M.

Note that the gap N does not have to exist between the physical adsorption type filter 211 and the chemical adsorption type filter 212. In this case, the filter member 200 can be formed compactly.

Further, in the second embodiment, the light source 4 is arranged outside the second filter 220. However, the light source 4 may be arranged inside M of the second filter 220. As a result, the filter member 200 can be formed compactly. When the light source 4 is arranged outside the second filter 220 as in the second embodiment, the light source 4 is prevented from interfering with the air flowing through the air passage 62, so that the internal M of the second filter 220 is suppressed. It is advantageous in that air can flow smoothly.

[Third Embodiment]
The air purifier 300 according to the third embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a diagram showing an air purifier 300 according to a third embodiment of the present invention. FIG. 8 is a cross-sectional view of the air purifier 300.

As shown in FIGS. 7 and 8, the air purifier 300 includes a housing 1. The housing 1 is, for example, a hollow member made of resin.

The housing 1 includes a first housing 10 and a second housing 20. A second housing 20 is detachably attached to the first housing 10. The second housing 20 is located outside the first housing 10. By attaching the second housing 20 to the first housing 10, a part of the first housing 10 is covered by the second housing 20. The first housing 10 and the second housing 20 may be an integral member.

The housing 1 further includes a grip 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 grips the grip portion 3 and carries the air purifier 300.

An intake port A is formed in the housing 1. The intake port A communicates the inside and the outside of the housing 1. The intake port A is formed in the lower part of the housing 1.

An outlet B is further formed in the housing 1. The air outlet B communicates between the inside and the outside of the housing 1. The air outlet B is formed on the upper part of the housing 1.

The air purifier 300 further includes a filter unit Y. The filter unit Y is arranged inside the housing 1. A filter member 200 is detachably attached to the housing 1.

The air purifier 300 further includes a rectifying unit 7 and a louver 8.

The rectifying unit 7 guides the air sent by the blower unit 6. The rectifying unit 7 is arranged downstream of the blower unit 6. The rectifying unit 7 is fixed to the housing 1.

The louver 8 guides the wind flowing from the rectifying unit 7. The louver 8 is a substantially plate-shaped member. The louver 8 is arranged downstream of the rectifying unit 7. The louver 8 is arranged immediately before the outlet B.

The louver 8 is rotatably attached to the housing 1. The louver 8 is rotatably supported with respect to the housing 1.

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

The air purifier 300 further includes an ion supply unit 9. The ion supply unit 9 is arranged between the blower 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 outlet B. Ions include at least one of positive and negative ions.

The air purifier 300 further includes a storage unit S1 and a control unit S2.

The storage unit S1 includes a main storage device (for example, a semiconductor memory) such as a ROM (Read Only Memory) and a RAM (Random Access Memory), and may further include an auxiliary storage device (for example, a hard disk drive). The main storage device and / or the auxiliary storage device stores various computer programs executed by the control unit S2.

The control unit S2 includes a processor such as a CPU (Central Processing Unit) and an MPU (Micro Processing Unit). The control unit S2 controls each element of the air purifier 300.

The air flow inside the housing 1 will be described with reference to FIG.

As shown in FIG. 8, when the blower unit 6 operates, the air outside the housing 1 flows into the inside of the housing 1 through the intake port A. The air that has flowed into the inside of the housing 1 flows into the interior M of the second filter 220 through the physical adsorption type filter 211, the chemisorption type filter 212, and the second filter 220 including the photocatalyst. At this time, since the light source 4 irradiates the second filter 220 with light, the catalytic action of the photocatalyst is generated. Therefore, the physical adsorption type filter 211 and the chemical adsorption type filter 212 adsorb the odorous component in the air, and the second filter 220 decomposes the odorous component in the air. As a result, odorous components in the air are reduced.

The air that has passed through the second filter 220 passes through the ion supply unit 9. As a result, ions are supplied to the air.

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

The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 8). However, the present invention is not limited to the above-described embodiment, and can be implemented in various embodiments without departing from the gist thereof (for example, (1) to (7). Various inventions can be formed by appropriately combining the plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. In order to make the drawings easier to understand, each component is schematically shown, and the number of each component shown may differ from the actual one due to the convenience of drawing. Each component shown in the above embodiment is an example, and is not particularly limited, and various modifications can be made without substantially deviating from the effect of the present invention.

(1) In the first embodiment, as shown in FIG. 3, the second filter 120 is arranged downstream of the first filter 110. However, the present invention is not limited to this. The second filter 120 may be arranged upstream of the first filter 110. In this case, the air flowing through the first filter 110 and the second filter 120 is purified by the second filter 120, and then the 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.

Further, also in the second embodiment and the third embodiment, the second filter 220 may be arranged upstream of the first filter 210. That is, the first filter 210 may be arranged inside the second filter 220.

(2) As shown in FIG. 3, the filter member 200 (each of the first filter 210 and the second filter 220) is formed in a substantially tubular shape and has a vertically symmetrical shape. Therefore, when the filter member 200 is mounted and used in a product such as the air purifier 300 (see FIGS. 7 and 8), the filter member 200 is moved up and down according to the usage time of the filter member 200. It can be used in reverse. 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 period of time. For example, due to the positional relationship between the blower portion 6 and the filter member 200, the upper part of the filter member 200 (the one closer to the blower portion 6) is more likely to get dirty, and the lower part of the filter member 200 (the one farther from the blower portion 6) is less likely to get dirty. When the filter member 200 has a portion that is easily soiled and a portion that is not easily soiled, the filter member 200 is efficiently turned upside down according to the usage time of the filter member 200. Can be used for.

(3) In the filter member 200 shown in FIG. 3, a sign may be provided on the outer surface of the filter member 200 and the accommodating portion in the product in which the filter member 200 is accommodated. As a result, when the filter member 200 is mounted on the accommodating portion of the product and used, the filter member 200 is used by rotating the filter member 200 little by little according to the usage time based on the sign, so that the filter member 200 is locally used. Can be suppressed.

(4) In the second embodiment and the third embodiment, each of the first filter 210 (physisorption type filter 211 and chemisorption type filter 212) and the second filter 220 is formed in a cylindrical shape. However, the present invention is not limited to this. Each of the first filter 210 and the second filter 220 may be formed in a polygonal cylinder shape. The polygonal tubular shape is a shape in which the shape of the edge portion of the cross section perpendicular to the central axis L (see FIG. 4) in each of the first filter 210 and the second filter 220 becomes a polygon. The cylindrical shape and the polygonal tubular shape are examples of the tubular shape of the present invention.

(5) In the second embodiment and the third embodiment, the chemisorption type filter 212 is arranged inside the physical adsorption type filter 211. That is, the chemisorption type filter 212 is arranged downstream of the physical adsorption type filter 211. As a result, the adhesion of dust to the chemisorption type filter 212 is suppressed, so that the function of the chemisorption type filter 212 (the function of reducing the odor component) can be effectively maintained. However, the present invention is not limited to this.

The physical adsorption type filter 211 may be arranged inside the chemical adsorption type filter 212. That is, the physical adsorption type filter 211 may be arranged downstream of the chemical adsorption type filter 212. In general, the physical adsorption type filter 211 has more types of odor components to be adsorbed than the chemical adsorption type filter 212, and tends to cause a problem of secondary odor. However, by arranging the physical adsorption type filter 211 downstream of the chemisorption type filter 212, the second filter 120 is located immediately downstream of the physical adsorption type filter 211, so that the photocatalyst of the second filter 220 causes a secondary odor. Can be effectively suppressed.

(6) In the second embodiment and the third embodiment, the first filter 210 includes a physical adsorption type filter 211 and a chemisorption type filter 212. However, the present invention is not limited to this. The first filter 210 may include at least one of a physical adsorption type filter 211, a chemisorption type filter 212, and a tubular dust collecting filter. When the first filter 210 is composed of any one of the physical adsorption type filter 211, the chemical adsorption type filter 212, and the tubular dust collecting filter, the holding portion 230 may not be provided. .. As a result, the number of parts of the filter member 200 can be reduced. When the first filter 210 includes two or more of the physical adsorption type filter 211, the chemisorption type filter 212, and the tubular dust collecting filter, two or more from the upstream to the downstream. The order in which the filters are arranged is not particularly limited.

(7) In the first embodiment, the two first filters 110 may be used and the second filter 120 may be arranged 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 one of the two first filters 110 is a chemisorption type filter.

In general, the photocatalyst is easily peeled off from the filter body when an external force is applied. However, by disposing the second filter 120 between the two first filters 110, 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 that no external force is applied to the photocatalyst contained in the second filter 120. As a result, peeling of the photocatalyst can be suppressed.

Further, in the second embodiment and the third embodiment, the second filter 220 containing a photocatalyst may be arranged between the chemisorption type filter 212 and the physical adsorption type filter 211.

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

100, 200 Filter members 110, 210 First filter 120, 220 Second filter 300 Air purifier

Claims (8)

A first filter that adsorbs odorous components and / or captures dust,
A second filter containing a photocatalyst and decomposing the odorous component when irradiated with light is provided.
A filter member in which the first filter is arranged to face the second filter. Each of the first filter and the second filter is formed in a tubular shape.
The filter member according to claim 1, wherein the second filter is arranged inside the first filter. The first filter includes a chemisorption type filter and a physical adsorption type filter.
The filter member according to claim 2. Inside one of the physical adsorption type filter and the chemical adsorption type filter, the physical adsorption type filter and the other filter of the chemical adsorption type filter are arranged.
The filter member according to claim 3, wherein the second filter is arranged inside the other filter. 3. The claim 3 or claim further includes a holding portion for holding the chemisorption type filter and the physical adsorption type filter so that a gap is formed between the chemisorption type filter and the physical adsorption type filter. The filter member according to 4. The first joining member to which both ends of the physical adsorption type filter are fixed, and
The filter member according to any one of claims 3 to 5, further comprising a second joining member to which both ends of the chemisorption type filter are fixed. The filter member according to claim 6, wherein the first joining member and the second joining member are arranged on opposite sides to the central axis of the filter member. An air purifier having the filter member according to any one of claims 1 to 7 detachably provided.

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