JP6569813B2 - Air cleaning device and dust collecting filter - Google Patents

Description

  The present invention relates to an air cleaning device and a dust collecting filter.

  Dirt such as dust adhering to the air filter may contain, for example, microorganisms such as viruses, bacteria, and fungi, or organic substances such as pollen and odor components. A technique for inactivating such microorganisms or organic substances by irradiating an air filter with ultraviolet rays is known.

  The air conditioner disclosed in Patent Document 1 below has the following configuration. It has a function to sterilize or disinfect the surface of the air filter built in the indoor unit with ultraviolet rays. A light guide plate is provided along the surface of the air filter, guides ultraviolet rays generated from the light source to a region facing the surface of the air filter, and irradiates the surface of the air filter. Between the light guide plate and the air filter, there is provided a second light guide plate that diffuses ultraviolet rays irradiated from the light guide plate in the surface direction of the air filter. The air filter includes a crosspiece that is a frame body portion and a net portion that is held by the frame body portion. A moving device that moves the light source and the light guide plate relative to the air filter is provided.

Japanese Patent No. 5651794

  In order to apply the technique of Patent Document 1, a dedicated light guide plate and a moving device for moving the light guide plate are required, which increases the number of components and increases the cost.

  The air filter provided in the air conditioner of Patent Document 1 uses a planar mesh portion as a filter medium. With such a planar air filter medium, it is relatively easy to irradiate ultraviolet rays over a wide area of the surface. On the other hand, for example, in a dust collection filter such as an air purifier, an air filter medium folded in a pleat shape is used for the purpose of increasing the surface area of the filter medium. When irradiating ultraviolet rays to an air filter medium folded into a pleat shape, there is a problem that the ultraviolet rays do not easily reach the interior of the valley of the pleats.

  The present invention has been made in order to solve the above-described problems. An air cleaning device and a collector capable of allowing ultraviolet rays to reach a wide range of the surface of an air filter medium having a pleat shape with a simple configuration. An object is to provide a dust filter.

An air cleaning device according to the present invention includes a dust collection filter and an ultraviolet light source, and the dust collection filter includes an air filter medium having a pleat shape, and a holding member that holds the shape of the air filter medium, The holding member includes a base portion extending in a direction intersecting the longitudinal direction of the pleat-shaped crease, and a protruding portion protruding from the base portion into the pleat-shaped valley, and the ultraviolet light source irradiates the holding member with ultraviolet rays, and the holding member At least a part of the material diffuses and transmits ultraviolet rays.
The dust collection filter according to the present invention includes an air filter medium having a pleat shape, and a holding member that holds the shape of the air filter medium, and the holding member intersects the longitudinal direction of the pleat-shaped fold. And a protruding portion protruding from the base portion into the pleated valley, and at least a part of the holding member diffuses and transmits ultraviolet rays.

  According to the present invention, at least a part of the holding member that holds the shape of the air filter medium diffuses and transmits ultraviolet light, so that the ultraviolet light can reach a wide range of the surface of the pleated air filter medium with a simple configuration. It becomes possible to make it.

2 is a schematic cross-sectional side view of the air cleaner according to Embodiment 1. FIG. It is a typical perspective view of the dust collection filter and ultraviolet light source with which the air cleaner of Embodiment 1 is provided. It is a schematic diagram of the dust collection filter and ultraviolet light source with which the air cleaner of Embodiment 1 is provided. 4 is a schematic cross-sectional view showing an internal structure of a material constituting the holding member in Embodiment 1. FIG. FIG. 3 is a schematic cross-sectional view of a part of the air filter medium in the first embodiment. It is a typical front view of the air cleaner of Embodiment 2. 6 is a schematic diagram of a dust collection filter and an ultraviolet light source according to Embodiment 3. FIG. FIG. 10 is a schematic diagram of a dust collection filter and an ultraviolet light source according to Embodiment 4.

  Hereinafter, embodiments will be described with reference to the drawings. In the drawings, common or corresponding elements are denoted by the same reference numerals, and redundant description is simplified or omitted. The present disclosure may include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1 FIG.
FIG. 1 is a schematic cross-sectional side view of the air cleaner 1 according to the first embodiment. The air cleaner 1 according to the first embodiment purifies indoor air. The air cleaner 1 is used, for example, by placing it on an indoor floor. The air cleaner 1 is an example of an air purifier. In order to facilitate understanding, the X axis, the Y axis, and the Z axis are set as shown in FIG. The X axis, the Y axis, and the Z axis are orthogonal to each other. The X axis and the Y axis extend horizontally. The Z axis extends vertically. In FIG. 1, the left side is the front of the air cleaner 1, and the right side is the back of the air cleaner 1.

  As shown in FIG. 1, the air cleaner 1 includes a housing 2, a dust collection filter 3, a blower 4, and an ultraviolet light source 5. A dust collection filter 3, a blower 4, and an ultraviolet light source 5 are accommodated in the housing 2. An air inlet 2 a is provided on the front surface of the housing 2. An air outlet 2 b is provided on the upper surface of the housing 2. The blower 4 may be a sirocco fan, for example. Inside the housing 2, a suction port 2 c of the blower 4 is formed. When the blower 4 is operated, the operation is as follows. Indoor air is sucked into the housing 2 from the suction port 2a. The air flows in the Y-axis direction and passes through the dust collection filter 3. The air purified by passing through the dust collection filter 3 flows in the Y-axis direction and flows into the blower 4 from the suction port 2c. The purified air is blown out of the housing 2 from the blower 4 through the blowout port 2b. The dust collection filter 3 may be a HEPA filter, for example. The air cleaner 1 may further include other devices (not shown) such as a prefilter and a deodorizing filter, for example.

  The dust collection filter 3 includes an air filter medium 6 and a holding member 7. The air filter medium 6 is formed by folding a sheet-shaped filter medium into a pleated shape. The air filter medium 6 may have a laminated structure. At least a part of the air filter medium 6 is constituted by a breathable fiber layer. The breathable fiber layer may be composed of at least one of felt, nonwoven fabric, woven fabric, and mesh, for example. The material constituting the breathable fiber layer may be made of at least one of polyolefin such as polyethylene or polypropylene, polyamide, rayon, polyester such as polyethylene terephthalate (for example, PET), for example. The thickness of the air filter medium 6 is not particularly limited, but may be, for example, about 0.05 mm to 1 mm.

  In the present embodiment, the dust collection filter 3 is arranged so that a plurality of elongated folded portions forming the pleated shape of the air filter medium 6 are arranged in the Z-axis direction, that is, the vertical direction. In other words, the dust collection filter 3 is disposed perpendicular to the horizontal plane. The posture in which the dust collection filter 3 is arranged is not limited to this. For example, the dust collection filter 3 may be arranged so that a plurality of elongated folded portions forming the pleated shape of the air filter medium 6 are arranged in the horizontal direction. In other words, the dust collection filter 3 may be disposed horizontally.

  In the present embodiment, the dust collection filter 3 is arranged so that the longitudinal direction of the pleat-shaped fold of the air filter medium 6 is the X-axis direction, that is, the horizontal direction. For example, the dust collection filter 3 may be arranged such that the longitudinal direction of the pleated fold of the air filter medium 6 is the Z-axis direction, that is, the vertical direction.

  The holding member 7 is a member for holding the shape of the air filter medium 6. The holding member 7 holds the shape of the air filter medium 6 by contacting the surface of the air filter medium 6. In FIG. 1, for the sake of convenience, the drawing is made so that there is a gap between the surface of the air filter medium 6 and the holding member 7, but the holding member 7 actually contacts the surface of the air filter medium 6. The same applies to the other drawings.

  The holding member 7 includes a base portion 7a and a protruding portion 7b. The base portion 7a is an elongated portion extending in a direction intersecting with the longitudinal direction of the pleated fold line of the air filter medium 6. In the present embodiment, the base 7a extends in the Z-axis direction, that is, the vertical direction. The protruding portion 7 b is a portion protruding from the base portion 7 a toward the pleated valley of the air filter medium 6. A plurality of projecting portions 7b project from the base portion 7a in a comb shape. The protrusions 7b are inserted into the pleated valleys of the air filter medium 6 respectively. The protrusion 7b is in contact with the surface of the air filter medium 6, so that the interval between the pleats is maintained. In the illustrated configuration, the shape of the protruding portion 7b is a triangle. The shape of the protrusion 7b is not limited to this, and may be a trapezoid, for example. The overall shape of the holding member 7 is a shape whose longitudinal direction is the Z-axis direction, that is, the vertical direction.

  The dust collection filter 3 may further include an annular frame member (not shown) that holds the outer periphery of the air filter medium 6. Both ends in the longitudinal direction of the holding member 7 may be supported by the inner peripheral portion of the frame member.

  The ultraviolet light source 5 is disposed at a position that irradiates at least the holding member 7 of the dust collection filter 3 with ultraviolet rays when turned on. In the present embodiment, an ultraviolet light source 5 is attached to the inner wall on the front surface of the housing 2.

  The ultraviolet light source 5 may be a light emitting diode, that is, an ultraviolet LED. The wavelength of the ultraviolet light emitted from the ultraviolet light source 5 may include a wavelength in the range of 200 nm to 300 nm, for example. The ultraviolet light source 5 may be other than the ultraviolet LED. For example, the ultraviolet light source 5 may be a mercury lamp.

  FIG. 2 is a schematic perspective view of the dust collection filter 3 and the ultraviolet light source 5 provided in the air cleaner 1 of the first embodiment. FIG. 2 shows a part of the dust collection filter 3. As shown in FIG. 2, the holding member 7 is a plate-like member having the thickness direction in the X-axis direction. The holding member 7 is a plate-like member whose plane is a plane perpendicular to the X axis. The base portion 7a of the holding member 7 has a first surface 7c that is a surface opposite to the protruding portion 7b. The ultraviolet light source 5 irradiates the first surface 7c with ultraviolet light. The first surface 7c extends along the Z-axis direction. The first surface 7c is a surface perpendicular to the Y axis.

  The width in the direction perpendicular to the longitudinal direction (length L1 in FIG. 2) of the plurality of elongated folded portions forming the pleated shape of the air filter medium 6 is not particularly limited, but may be, for example, 20 mm to 50 mm. . Although the space | interval (length L2 in FIG. 2) of the pleats of the air filter medium 6 is not specifically limited, For example, 2 mm-5 mm may be sufficient.

  The dust collection filter 3 includes a plurality of holding members 7. The plurality of holding members 7 are arranged at intervals in the longitudinal direction of the pleated folds of the air filter medium 6, that is, in the X-axis direction. In FIG. 2, only one of the holding members 7 is shown.

  FIG. 3 is a schematic diagram of the dust collection filter 3 and the ultraviolet light source 5 provided in the air cleaner 1 according to the first embodiment. FIG. 3 shows a part of the dust collection filter 3. FIG. 3 is a view as seen from the X-axis direction. As shown in FIG. 3, the ultraviolet rays irradiated from the ultraviolet light source 5 enter the holding member 7 from the first surface 7c. At least a part of the holding member 7 diffuses and transmits ultraviolet rays. The entire holding member 7 may diffuse and transmit ultraviolet rays.

  The holding member 7 has a facing surface 7 d that faces the surface of the air filter medium 6. 7 d of opposing surfaces are a part of surface of the protrusion part 7b. The ultraviolet rays that have entered the holding member 7 are diffused inside the holding member 7 and spread throughout the holding member 7. The ultraviolet rays diffused inside the holding member 7 are emitted from the surface of the holding member 7 to the outside, and are irradiated on the surface of the air filter medium 6. For example, the ultraviolet light emitted from the facing surface 7 d of the holding member 7 is irradiated on the surface of the air filter medium 6. Further, ultraviolet rays are emitted from the surface of the holding member 7 perpendicular to the X axis, and the ultraviolet rays are applied to the surface of the air filter medium 6.

  A broken line in FIG. 3 shows an example of a range where ultraviolet rays reach on the surface of the air filter medium 6. The ultraviolet rays not only reach the region of the surface of the air filter medium 6 that faces the facing surface 7 d of the holding member 7. Ultraviolet rays are also emitted from the surface of the holding member 7 perpendicular to the X axis, so that the ultraviolet rays reach the surface of the air filter medium 6 at a position away from the holding member 7.

  A part of the ultraviolet light emitted from the ultraviolet light source 5 may be directly applied to the surface of the air filter medium 6 without entering the holding member 7. All of the ultraviolet rays emitted from the ultraviolet light source 5 may enter the holding member 7. It suffices that at least a part of the ultraviolet light emitted from the ultraviolet light source 5 enters the holding member 7.

  The dirt such as dust collected on the air filter medium 6 may contain, for example, microorganisms such as viruses, bacteria and fungi, or organic substances such as pollen and odor components. In the present embodiment, ultraviolet rays emitted from the ultraviolet light source 5 reach the surface of the air filter medium 6 through the holding member 7 to inactivate such microorganisms or organic substances. Can do. Inactivation of microorganisms or organic substances by ultraviolet rays is referred to as “sterilization” in the following description.

  In the present embodiment, the following effects can be obtained. By irradiating the surface of the air filter medium 6 with ultraviolet light through the holding member 7 that diffuses and transmits the ultraviolet light, the ultraviolet light can reach a wide range of the surface of the air filter medium 6. In particular, since the ultraviolet rays are emitted from the protrusions 7b in the pleat valleys of the air filter medium 6, the ultraviolet rays can reach the back of the pleat valleys. The above-mentioned effect can be obtained by using the holding member 7 for holding the shape of the air filter medium 6, and it is not necessary to add a dedicated part for guiding ultraviolet rays, so that an increase in cost can be suppressed. . Even if the number of the ultraviolet light sources 5 is not increased or a moving device for moving the ultraviolet light sources 5 is not provided, the ultraviolet light can reach a wide range of the surface of the air filter medium 6. From these things, a wide range of the surface of the air filter medium 6 can be sterilized with a simple configuration.

  FIG. 4 is a schematic cross-sectional view showing the internal structure of the material constituting the holding member 7 in the first embodiment. As shown in FIG. 4, at least a part of the holding member 7 is composed of a resin material 7f in which particles 7e serving as a light diffusing agent are dispersed. The particles 7e and the resin material 7f have ultraviolet transparency that transmits at least a part of wavelengths of ultraviolet rays emitted from the ultraviolet light source 5. The particles 7e and the resin material 7f have different refractive indexes. The ultraviolet rays are diffused by reflecting or refracting the ultraviolet rays at the interface between the particles 7e and the resin material 7f.

  The resin material 7f may be, for example, an acrylic resin or a styrene resin. The material of the particles 7e may be, for example, an acrylic resin or a styrene resin. As the particles 7e, for example, trade name “Techpolymer” manufactured by Sekisui Plastics Co., Ltd. may be used. The particles 7e are not limited to those made of resin, and may be made of glass. The shape of the particle 7e is not limited to the spherical shape as illustrated, and may be a shape other than the spherical shape. The average particle diameter of the particles 7e may be in the range of 1 μm to 200 μm, for example.

  In the present embodiment, the ultraviolet light source 5 irradiates the first surface 7c of the holding member 7 with ultraviolet rays, so that the ultraviolet light incident from the first surface 7c into the holding member 7 is applied to the plurality of protrusions 7b. It becomes possible to distribute equally close. The entire holding member 7 may diffuse and transmit ultraviolet rays, but a part of the holding member 7 may transmit ultraviolet rays regularly. For example, the base portion 7a of the holding member 7 may transmit ultraviolet rays. In the case where the base 7a transmits ultraviolet light regularly, the ultraviolet light that has entered the holding member 7 from the first surface 7c can be efficiently guided to the protruding portion 7b. The ultraviolet rays can reach a wide range on the surface of the air filter medium 6 by allowing the projections 7 b to diffuse and transmit the ultraviolet rays. When the base portion 7a of the holding member 7 diffuses and transmits ultraviolet light, the ultraviolet light that has entered the holding member 7 from the first surface 7c can be distributed more evenly to the plurality of protruding portions 7b. . As described above, the configuration in which the light from the ultraviolet light source 5 easily diffuses is particularly effective when an ultraviolet LED with a point emission and a narrow irradiation range is used.

  The ultraviolet light source 5 and the holding member 7 are preferably arranged on the upstream side with respect to the air flow in the air cleaner 1. Dirt such as dust collected on the air filter medium 6 tends to accumulate on the upstream surface of the air filter medium 6. By irradiating the air filter medium 6 with ultraviolet rays from the upstream side of the air flow, the air filter medium 6 can be sterilized more efficiently.

  The air filter medium 6 may include a plurality of layers. FIG. 5 is a schematic cross-sectional view of a part of the air filter medium 6 in the first embodiment. The air filter medium 6 shown in FIG. 5 has a structure in which a first layer 6a and a second layer 6b are bonded together. The first layer 6a and the second layer 6b may be composed of fibers having different materials and / or outer diameters. The first layer 6a may be a fine sheet for collecting dust. A fine sheet for collecting dust is low in strength. The second layer 6b may be a coarse sheet for reinforcing the first layer 6a. Even if the dust collection filter 3 is disposed so that the coarse second layer 6b is on the upstream side and the fine first layer 6a is on the downstream side with respect to the air flow in the air cleaner 1. Good. The air filter medium 6 is not limited to the illustrated configuration, and may include a plurality of layers of three layers or more.

  The air filter medium 6 may include a deodorant. The deodorizer may be, for example, an activated carbon paste that adsorbs odor components. The deodorizer may be, for example, a photocatalyst that decomposes odor components. The photocatalyst may be, for example, titanium oxide. The deodorizer may be carried on the surface of the fiber of the air filter medium 6. The deodorizing agent may be kneaded into the fibers of the air filter medium 6. When the air filter medium 6 includes a plurality of layers, at least one of them may include a deodorizing agent.

Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIG. 6. The description will focus on the differences from the first embodiment described above, and the description of the same or corresponding parts will be simplified or omitted. FIG. 6 is a schematic front view of the air cleaner 1 according to the second embodiment. FIG. 6 corresponds to a view seen through the front wall of the housing 2 of the air purifier 1. The air cleaner 1 according to the second embodiment is the same as the air cleaner 1 according to the first embodiment except for the matters described below.

  The air cleaner 1 according to the second embodiment includes a plurality of ultraviolet light sources 5. The dust collection filter 3 can be divided into a first region 3a and a second region 3b. The first area 3a is an area surrounded by a broken-line circle in FIG. The second area 3b is an area outside the circle of the first area 3a. The flow rate of air passing through the second region 3b is lower than the flow rate of air passing through the first region 3a. The first region 3 a is at a position facing the suction port 2 c of the blower 4. For this reason, the flow velocity of air passing through the first region 3a is higher than the flow velocity of air passing through the second region 3b. The amount of dirt per area collected in the dust collection filter 3 increases as the region where the flow velocity of the passing air is higher. For this reason, the amount of dirt per area accumulated in the first region 3a is larger than the amount of dirt per area accumulated in the second region 3b.

  In the example shown in FIG. 6, five ultraviolet light sources 5 are arranged for the first region 3a, and four ultraviolet light sources 5 are arranged for the second region 3b. The area of the first region 3a is smaller than the area of the second region 3b. The area of the first region 3a is the area of a broken-line circle in FIG. The area of the second region 3b is an area obtained by subtracting the area of the first region 3a from the projected area obtained by projecting the dust collection filter 3 onto a plane perpendicular to the Y axis.

  The first arrangement density obtained by dividing the number of the ultraviolet light sources 5 arranged for the first region 3a by the area of the first region 3a is the number of the ultraviolet light sources 5 arranged for the second region 3b. Higher than the second arrangement density divided by the area of 3b. By doing so, the following effects can be obtained. The first region 3a having a large amount of dirt per area can be intensively irradiated with ultraviolet rays. Therefore, the dust collection filter 3 can be sterilized more reliably.

Embodiment 3 FIG.
Next, the third embodiment will be described with reference to FIG. 7. The description will focus on differences from the above-described embodiment, and the description of the same or corresponding parts will be simplified or omitted. FIG. 7 is a schematic diagram of the dust collection filter 3 and the ultraviolet light source 5 in the third embodiment. FIG. 7 shows a part of the dust collection filter 3. FIG. 7 is a diagram viewed from the X-axis direction.

  As shown in FIG. 7, the holding member 7 included in the dust collection filter 3 of the present embodiment has an incident surface 7g formed at the end portion in the longitudinal direction of the base portion 7a. The ultraviolet light source 5 is disposed so as to irradiate the incident surface 7 g of the holding member 7 with ultraviolet rays. The ultraviolet rays that have entered the holding member 7 from the incident surface 7 g are diffused inside the holding member 7, and are thus distributed throughout the holding member 7. The ultraviolet rays diffused inside the holding member 7 are emitted from the surface of the holding member 7 to the outside, and are irradiated on the surface of the air filter medium 6. The broken line in FIG. 7 shows an example of a range where ultraviolet rays reach on the surface of the air filter medium 6.

  A part of the ultraviolet light incident on the holding member 7 from the incident surface 7g is guided along the longitudinal direction of the base portion 7a, and reaches the protruding portion 7b located far from the incident surface 7g. At least a part of the base portion 7a may transmit ultraviolet rays. By allowing at least a part of the base 7a to transmit ultraviolet rays regularly, it is possible to more efficiently reach the projections 7b located far from the incident surface 7g.

  The dust collection filter 3 of the present embodiment includes an ultraviolet reflection layer 8 provided on a part of the surface of the holding member 7. The ultraviolet reflecting layer 8 is provided on the first surface 7c which is the surface opposite to the protruding portion 7b. The ultraviolet reflecting layer 8 may be a metal film such as aluminum, for example. The metal film may be formed by vapor deposition, for example. A protective layer (not shown) that covers the surface of the ultraviolet reflecting layer 8 may be further provided. In the present embodiment, the following effects can be obtained by providing the ultraviolet reflecting layer 8. It is possible to prevent ultraviolet rays from being emitted from the first surface 7 c of the holding member 7. Assuming that ultraviolet rays are emitted from the first surface 7 c, the ultraviolet rays are not irradiated to the air filter medium 6. On the other hand, the amount of ultraviolet rays emitted from the surface other than the first surface 7c of the holding member 7 can be increased by reflecting the ultraviolet rays reaching the first surface 7c by the ultraviolet reflecting layer 8. Therefore, the amount of ultraviolet rays applied to the air filter medium 6 can be increased.

  In the present embodiment, the ultraviolet light source 5 irradiates the incident surface 7g at the end of the holding member 7 in the longitudinal direction of the base portion 7a with the following effects. The ultraviolet light source 5 can be arranged at a position that does not hinder the flow of air passing through the dust collection filter 3. That is, the pressure loss of the air passage can be reduced.

Embodiment 4 FIG.
Next, the fourth embodiment will be described with reference to FIG. 8. The difference from the above-described embodiment will be mainly described, and the description of the same or corresponding parts will be simplified or omitted. FIG. 8 is a schematic diagram of the dust collection filter 3 and the ultraviolet light source 5 in the fourth embodiment. FIG. 8 shows a part of the dust collection filter 3. FIG. 8 is a diagram viewed from the X-axis direction.

  As shown in FIG. 8, the holding member 7 included in the dust collection filter 3 of the fourth embodiment has a facing surface 7 h instead of the facing surface 7 d in the first embodiment. The facing surface 7 h faces the surface of the air filter medium 6. The facing surface 7h is a part of the surface of the protruding portion 7b. A large number of fine irregularities for diffusing ultraviolet rays are formed on the facing surface 7h. The unevenness of the facing surface 7h may be formed by, for example, embossing or may be formed by shot blasting.

  The ultraviolet rays irradiated from the ultraviolet light source 5 enter the holding member 7 from the first surface 7 c. When ultraviolet rays pass through the holding member 7 and exit from the opposing surface 7h, the ultraviolet rays are diffused by the unevenness of the opposing surface 7h. Further, the ultraviolet rays that reach the facing surface 7 h in the holding member 7 are irregularly reflected by the unevenness of the facing surface 7 h, so that the ultraviolet rays are diffused inside the holding member 7. In this way, the ultraviolet light that has entered the holding member 7 spreads throughout the holding member 7. The ultraviolet rays that have spread to the inside of the holding member 7 are emitted from the surface of the holding member 7 to the outside, and are irradiated on the surface of the air filter medium 6. For example, the ultraviolet light emitted from the facing surface 7 d of the holding member 7 is irradiated on the surface of the air filter medium 6. Further, ultraviolet rays are emitted from the surface of the holding member 7 perpendicular to the X axis, and the ultraviolet rays are applied to the surface of the air filter medium 6. Concavities and convexities similar to those of the facing surface 7 h may also be formed on the surface of the holding member 7 perpendicular to the X axis.

  A broken line in FIG. 8 shows an example of a range where ultraviolet rays reach on the surface of the air filter medium 6. The ultraviolet rays not only reach the region of the surface of the air filter medium 6 that faces the facing surface 7 d of the holding member 7. Ultraviolet rays are also emitted from the surface of the holding member 7 perpendicular to the X axis, so that the ultraviolet rays reach the surface of the air filter medium 6 at a position away from the holding member 7. As described above, according to the present embodiment, an effect similar to that of the first embodiment can be obtained.

  The material forming the holding member 7 in the fourth embodiment has an ultraviolet transparency that transmits at least a part of wavelengths of the ultraviolet rays emitted from the ultraviolet light source 5. The material forming the holding member 7 may be, for example, an acrylic resin or a styrene resin. The holding member 7 in the fourth embodiment may not be made of a material containing a light diffusing agent as in the first embodiment. In the fourth embodiment, it is only necessary that the ultraviolet rays are diffused on the surface of the holding member 7, and the ultraviolet rays need not be diffused inside the holding member 7.

  As mentioned above, although embodiment of this invention was described, the air purifying apparatus and dust collection filter of this invention can apply not only to air purifying apparatus like the air cleaner 1 demonstrated in Embodiment 1 and 2, but For example, the present invention can also be applied to an air purifier that is integrated in an air conditioner, an air purifier that purifies the exhaust of a vacuum cleaner, and the like.

DESCRIPTION OF SYMBOLS 1 Air cleaner, 2 Housing | casing, 2a Inlet, 2b Outlet, 2c Inlet, 3 Dust collection filter, 3a 1st area | region, 3b 2nd area | region, 4 Air blower, 5 Ultraviolet light source, 6 Air filter medium, 6a First layer, 6b Second layer, 7 Holding member, 7a Base, 7b Projection, 7c First surface, 7d Opposing surface, 7e Particle, 7f Resin material, 7g Incident surface, 7h Opposing surface, 8 Ultraviolet reflecting layer

Claims (11)

A dust collecting filter;
An ultraviolet light source,
With
The dust collection filter includes an air filter medium having a pleat shape, and a holding member that holds the shape of the air filter medium,
The holding member includes a base portion extending in a direction intersecting a longitudinal direction of the pleat-shaped crease, and a protruding portion protruding from the base portion to the valley of the pleat shape,
The ultraviolet light source irradiates the holding member with ultraviolet rays,
At least a part of the holding member is an air cleaning device that diffuses and transmits ultraviolet rays.   The air purifier according to claim 1, wherein the protrusion of the holding member diffuses and transmits ultraviolet rays.   The air cleaning device according to claim 1, wherein the base portion of the holding member diffuses and transmits ultraviolet rays.   The air cleaning device according to any one of claims 1 to 3, wherein at least a part of the holding member is made of a resin material in which particles serving as a light diffusing agent are dispersed.   The air cleaner according to any one of claims 1 to 4, wherein unevenness for diffusing ultraviolet rays is formed on at least a part of the surface of the holding member. A plurality of the ultraviolet light sources,
When the dust collection filter is divided into a first region and a second region where the flow velocity of air passing therethrough is lower than that of the first region, the number of the ultraviolet light sources arranged with respect to the first region The first arrangement density divided by the area of the first region is higher than the second arrangement density obtained by dividing the number of the ultraviolet light sources arranged for the second region by the area of the second region. The air purifier as described in any one of Claims 1-5. The base portion of the holding member has a first surface that is a surface opposite to the protruding portion;
The air cleaner according to any one of claims 1 to 6, wherein the ultraviolet light source irradiates the first surface with ultraviolet rays.   The air cleaner according to any one of claims 1 to 6, wherein the ultraviolet light source irradiates ultraviolet light to an end portion in a longitudinal direction of the base portion of the holding member.   The air purifier according to any one of claims 1 to 8, wherein the air filter medium includes a deodorizing agent.   The air cleaning device according to any one of claims 1 to 9, further comprising an ultraviolet reflecting layer provided on a part of the surface of the holding member. An air filter medium having a pleat shape;
A holding member for holding the shape of the air filter medium;
With
The holding member includes a base portion extending in a direction intersecting a longitudinal direction of the pleat-shaped crease, and a protruding portion protruding from the base portion to the valley of the pleat shape,
At least a part of the holding member is a dust collection filter that diffuses and transmits ultraviolet rays.

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