JP2004105879A - Air cleaning filter unit and equipment using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaning filter unit which is provided with an easily attachable/detachable deodorizing filter and a pre-filter and in which the deodorizing filter can be installed at a prescribed position while keeping its shape and to provide equipment using the air cleaning filter unit. <P>SOLUTION: This air cleaning filter unit is composed of the pre-filter 2, a filter pressing frame 3, the deodorizing filter 4, a dust collecting filter 5, and a frame unit 6 which are arranged in this order from the air suction side. The filter 4 can keep its shape by arranging a projecting part on the frame 3 at the position consistent with that of the recessed part on the surface of the filter 4. The filter 4 can be easily attached/detached by arranging a projecting part 23 on the side face of the filter 2 and a locking hole 64 on the unit 6 and inserting the part 23 into the hole 64 to combine the filter 2 with the unit 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air purifying filter unit and an apparatus using the same.
[0002]
[Prior art]
Indoor air is contaminated with various substances, such as dust, cigarette smoke, pollen, and carbon dioxide emitted with respiration. In recent years, the airtightness of houses has increased, and contaminants easily accumulate in rooms. Therefore, it is necessary to actively reform the air in order to obtain a comfortable environment.
[0003]
In reforming air, in order to remove harmful contaminants floating in the air, it is common to filter, adsorb, and decompose these with a filter. A conventional air cleaning filter used for such a purpose includes a filter configured by a combination of a prefilter, a deodorizing filter, and a dust collecting filter. The pre-filter collects large dust. The deodorizing filter adsorbs odor components such as acetaldehyde, ammonia, and acetic acid in the air. The dust collecting filter collects fine dust, and the use of a so-called HEPA filter has been proposed. Since the performance of the filter deteriorates when it is used for a long period of time, the performance is maintained by performing maintenance such as replacement.
[0004]
As a deodorizing filter for an air purifying filter as described above, an air purifying filter using a deodorizing filter composed of granular activated carbon has been proposed in order to increase the adsorption amount (for example, see Patent Document 1). ). The deodorizing filter according to this technique is configured such that granular activated carbon is housed in a honeycomb core formed of a synthetic resin or the like, and the whole is formed in a flat plate shape. In addition, there is also a configuration in which a bag-shaped storage chamber is formed of a soft material such as cloth, and granular activated carbon is stored in the storage chamber, and the whole is formed in a flat plate shape.
[0005]
[Patent Document 1]
JP-A-11-114333
[Problems to be solved by the invention]
An air purifying filter as described in Patent Document 1 has a high odor adsorption speed and a large amount that can be adsorbed. However, these abilities are limited, and the ability to reform into comfortable air is maintained. Therefore, it is necessary to replace the deodorizing filter. Therefore, the running cost tends to increase.
[0007]
In contrast, a deodorizing filter made of a soft material such as cloth can be washed and regenerated, so running costs are low, but because the whole is flexible, it is difficult to maintain its shape by itself. If the filter surface is vertical, it becomes more difficult, and there is a problem that the filter surface is shifted from a predetermined position.
[0008]
The present invention has been made in view of the above points, and includes a deodorizing filter and a pre-filter that can be easily attached and detached for recycling, and the deodorizing filter is mounted at a predetermined position without breaking the shape. It is an object of the present invention to provide an air purifying filter unit capable of performing the above-mentioned steps and an apparatus using the same.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a pre-filter, a deodorizing filter, and an air purifying filter unit including a dust collection filter in a frame, wherein the pre-filter is disposed in the frame from an air suction side. The deodorizing filter and the dust collecting filter were arranged in this order, and a means for preventing the deodorizing filter from being deformed was provided between the prefilter and the deodorizing filter.
[0010]
According to this configuration, the deodorizing filter can be mounted at a predetermined position of the air cleaning filter unit.
[0011]
In addition, the pre-filter was provided with the shape-preventing means on the surface on the side where the deodorizing filter was provided.
[0012]
According to this configuration, the deodorizing filter can be mounted at a predetermined position of the air cleaning filter unit without using a member or the like that holds the deodorizing filter at a predetermined position in the frame.
[0013]
Further, the shape prevention means is a projection for holding the deodorizing filter.
[0014]
According to this configuration, since the deodorizing filter is pressed by the projection, the deodorizing filter does not shift in the frame. Therefore, the deodorizing filter can be attached to a predetermined position of the air cleaning filter unit.
[0015]
In addition, a filter holding frame was disposed between the pre-filter and the deodorizing filter as the shape-preventing means.
[0016]
According to this configuration, each of the dust collecting filter and the deodorizing filter is put in the frame in this order, and the deodorizing filter is pressed against the hard and flat surface of the dust collecting filter by using the filter holding frame, whereby the deodorizing filter is framed. There is no need for special fixtures to be attached to the device.
[0017]
Further, in an air purifying filter unit including a pre-filter, a deodorizing filter, and a dust collecting filter in the frame, the pre-filter, the deodorizing filter, and the dust collecting filter are arranged in the frame from the air suction side. While arranging, a filter holding frame is arranged between the pre-filter and the deodorizing filter, and the filter holding frame, the deodorizing filter, and the dust collecting filter can be taken out from the frame of the air cleaning filter unit. A pre-filter is coupled to the frame to prevent components within the frame from falling out of the frame.
[0018]
According to this configuration, the deodorizing filter and the dust collecting filter can be easily attached to and detached from the air cleaning filter unit.
[0019]
Further, the filter holding frame has a projection on the surface on the side where the deodorizing filter exists.
[0020]
According to this configuration, since the filter is held down by the projection, the filter holding frame and the deodorizing filter do not shift. Therefore, the deodorizing filter can be mounted at a predetermined position of the air cleaning filter unit, and the deodorizing filter does not lose its shape.
[0021]
In addition, the projection on the surface of the filter holding frame has a bar shape.
[0022]
According to this configuration, the strength of the protruding portion can be improved, the force supporting the deodorizing filter can be improved, and the displacement of the filter holding frame and the deodorizing filter can be further suppressed.
[0023]
In addition, the deodorizing filter is formed so that the entire surface is uneven, and a projection of the filter holding frame is provided so as to correspond to the concave portion.
[0024]
According to this configuration, the filter holding frame and the deodorizing filter hardly shift, and the deodorizing filter can be reliably held at a predetermined position of the air cleaning filter unit.
[0025]
Further, the pre-filter has a protrusion on a side surface, and the connection is made by inserting the protrusion from the inside into a locking hole provided in the frame.
[0026]
According to this configuration, it is possible to form an air cleaning filter unit by sequentially fitting the dust collecting filter, the deodorizing filter, the filter holding frame, and the pre-filter into the frame.
[0027]
Further, a protrusion on the side surface of the pre-filter protrudes outside the frame.
[0028]
According to this configuration, in the air cleaning filter unit, the bonding strength of the pre-filter to the frame body is increased, and further, when handling the air cleaning filter unit, it is possible to put a finger on the protrusion.
[0029]
Further, in the present invention, a concave storage portion for storing the air purifying filter unit is formed in the housing of the device, and an edge of the concave filter storing portion is provided with the air purifying filter unit. A recess for finger hanging is provided at a position corresponding to the protrusion.
[0030]
According to this configuration, the protrusion of the pre-filter for forming the air purifying filter unit does not hinder the operation when the air purifying filter unit is stored in the device, and the finger does not touch the air purifying filter unit. Is also easy.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0032]
FIG. 1 is a front perspective view of a state in which components of an air cleaning filter unit according to a first embodiment of the present invention are disassembled. FIG. 2 is a front perspective view of the assembled state of the air cleaning filter unit shown in FIG. The air purifying filter unit 1 is designed to be combined with an air purifier, and includes three types of filters in a frame 6, namely, a pre-filter 2, a deodorizing filter 4, and a dust collecting filter 5 from the air suction side. Are arranged. A filter holding frame 3 is provided between the pre-filter 2 and the deodorizing filter 4.
[0033]
FIG. 3 is a front perspective view of a prefilter of the air cleaning filter unit shown in FIG. In the pre-filter 2, a mesh 22 made of polypropylene is welded to a rectangular frame 21 made of a synthetic resin such as ABS so as to form four rows and four rows of windows. The rectangular frame 21 is provided with four projections 23 on its side, two on each side. A projection rib 24 is provided on the front. The pre-filter 2 collects large dust from the sucked air.
[0034]
FIG. 4 is a schematic configuration diagram of a deodorizing filter of the air cleaning filter unit shown in FIG. FIG. 4A is a front perspective view of the deodorizing filter, and FIG. 4B is a side view of the deodorizing filter. The deodorizing filter 4 divides a rectangular bag 41 made of polypropylene fiber and polyester fiber so that seven storage chambers 42 having a uniform size are vertically continuous, and activated carbon is uniformly dispersed in each of the four storage chambers 42. It is packed. Since the whole is made of a flexible material such as synthetic fiber, by filling each storage chamber 42 with activated carbon, irregularities are formed on the surface when viewed from the side as shown in FIG. 4B. The deodorizing filter 4 adsorbs odor components in the air, such as acetaldehyde, ammonia, and acetic acid.
[0035]
FIG. 5 is a front perspective view of the dust collection filter of the air cleaning filter unit shown in FIG. The dust collecting filter 5 is a so-called HEPA filter, and a melt blown nonwoven fabric (trade name “Tremicron”: manufactured by Toray Industries, Inc.) processed with an electric stone is added to an aggregate made of a polyester / vinylon-based nonwoven fabric. In addition, an antibacterial sheet made of a non-woven fabric subjected to hydroxyapatite processing is stacked on the upper and lower surfaces thereof, and then thermocompression-bonded, and a frame made of a non-woven fabric subjected to a hot melt treatment is welded to collect fine dust.
[0036]
FIG. 6 is a perspective view of the filter holding frame of the air cleaning filter unit shown in FIG. 1 as viewed from the side of the deodorizing filter. The filter holding frame 3 is provided with a rectangular frame 31 having seven steps and three rows of square holes 32 through which air can flow. The height of the square holes 32 is set in accordance with the unevenness of the surface of the deodorizing filter 4. Further, on the leeward side surface, that is, the surface facing the deodorizing filter 4, a total of six bar-shaped projections 33 are provided between the square holes 32. The cross section 33 has the same width as the width of the filter holding frame 3 and protrudes in the horizontal direction toward the deodorizing filter 4. In addition, the protrusion for holding down the deodorizing filter 4 does not necessarily need to be in the shape of a bar, but may be a protrusion such as a rod.
[0037]
FIG. 7 is a front perspective view of a frame of the air cleaning filter unit shown in FIG. The frame body 6 is a box body 61 in which one surface on the leeward side is completely open, and is provided on the leeward side surface with square holes 62 of six steps and four rows into which air can flow, and a lattice frame 63. The lattice frame 63 is for preventing the dust collection filter 5 from falling off. The thickness of the frame 6 is such that the dust collecting filter 5, the deodorizing filter 4, the filter holding frame 3, and the pre-filter 2 can be accommodated therein. The side surface is provided with a total of four locking holes 64, two on each side surface.
[0038]
FIG. 8 is a side view showing the positional relationship between the deodorizing filter and the filter holding frame of the air cleaning filter unit shown in FIG. When the deodorizing filter 4 is set up in the frame 6 with the deodorizing filter 4 standing almost vertically, it is difficult to keep the shape when the filter is mounted vertically because the whole is flexible. The problem of shifting occurs. Therefore, as shown by the arrow in the figure, the bar-shaped projection 33 provided on the filter holding frame 3 is aligned with the concave portion 43 on the surface of the deodorizing filter 4. Thus, the deodorizing filter 4 can maintain a predetermined position without being displaced from the filter frame 3 and without being deformed inside the frame 6.
[0039]
FIG. 9 is a front perspective view showing a state in which the pre-filter of the air cleaning filter unit shown in FIG. 1 is connected to a frame. When connecting the pre-filter 2 to the frame 6, the connection is made by inserting the four protrusions 23 of the pre-filter 2 into the corresponding locking holes 64 of the frame 6. From the state where the pre-filter 2 and the frame 6 are combined, the pre-filter 2 is bent toward the front surface side, and the projection 23 is removed from the locking hole 64 of the frame 6, so that the pre-filter 2 and the frame 6 The connection is released, and the pre-filter 2 can be removed.
[0040]
FIG. 10 is a partial sectional side view of the air cleaning filter unit shown in FIG. 1. Arrow A in the figure indicates the direction in which the sucked air flows. The components are stored in the frame body 6 in the order of the dust collecting filter 5, the deodorizing filter 4, the filter holding frame 3, and the pre-filter 2 from the leeward side. When the projection 23 of the pre-filter 2 is inserted into the locking hole 64 of the frame 6, the pre-filter 2 and the frame 6 are joined together, and the filter and the like inside are not dropped off without removing the internal filter. The filter unit 1 is formed. When the projection 23 projects from the frame 6, the air cleaning filter unit 1 is firmly formed, and a finger can be hooked on the projection 23, which is very convenient for handling. Although the deodorizing filter 4 is in a flexible form as a whole, the deodorizing filter 4 is arranged so that the bar-shaped projection 33 of the filter holding frame 3 coincides with the concave portion 43 on the surface thereof. It is possible to hold the position.
[0041]
FIG. 11 is a front perspective view showing a situation where the air purifying filter unit shown in FIG. 1 is combined with an air purifier. The air purifier 7 has a housing 71 with a built-in fan and a control unit (both not shown), a concave filter storage unit 72 provided on the front surface, and a ventilation hole 73 provided in a wall behind the filter storage unit 72. ing. The air purifying filter unit 1 is housed in the filter housing 72, and a front panel (not shown) is mounted on the front surface thereof. Further, a recess 74 for finger hanging is provided at the edge of the concave filter housing portion 72 at a position corresponding to the projection 23 of the air cleaning filter unit 1.
[0042]
FIG. 12 is a partially enlarged view showing a state where the air purifying filter unit shown in FIG. 1 is housed in an air purifier. In the housing 71 of the air purifier 7, the vicinity of the finger hanging recess 74 is partially enlarged. As shown in the figure, even when the air purifying filter unit 1 is housed in the filter storage section 72 of the air purifier 7, the protrusion 23 protruding from the frame 6 fits into the recess 74, and the protrusion 23 is There is no contact with the body 71. Further, since there is room in the recess 74 from the protrusion 23 toward the back, a finger can be hooked on the protrusion 23, and the air cleaning filter unit 1 can be easily removed. It is.
[0043]
FIG. 13 is a perspective view of the prefilter of the air cleaning filter unit according to the second embodiment of the present invention as viewed from the deodorizing filter side. The outline of the materials used and the configuration is the same as in the first embodiment. The pre-filter 2 is welded such that the mesh 22 forms windows of seven steps and four rows in the rectangular frame 21. The height of the mesh 22 is set according to the unevenness of the surface of the deodorizing filter 4. Further, a bar-shaped projection 25 is provided between the respective meshes 22 on the leeward side surface, that is, the surface facing the deodorizing filter 4. The rod-shaped protrusion 25 protrudes in the horizontal direction toward the deodorizing filter 4. In addition, the protrusion for holding down the deodorizing filter 4 does not necessarily need to be bar-shaped.
[0044]
FIG. 14 is a partial cross-sectional side view of the air cleaning filter unit when the prefilter shown in FIG. 13 is used. Arrow A in the figure indicates the direction in which the sucked air flows. The outline of the configuration is the same as that of FIG. 10 of the first embodiment. The difference from the first embodiment is that the pre-filter 2 has the bar-shaped projection 25 for holding down the deodorizing filter 4, so that the filter holding frame 3 does not need to be provided. Therefore, it is possible to reduce the overall thickness of the air cleaning filter unit 1 and to make it compact.
[0045]
Although the embodiment of the present invention has been described above, other various modifications can be made without departing from the gist of the present invention.
[0046]
【The invention's effect】
The present invention relates to an air cleaning filter unit including a pre-filter, a deodorizing filter, and a dust collecting filter in a frame, wherein the pre-filter, the deodorizing filter, and the dust collecting filter are arranged in the frame from an air suction side. And a means for preventing the deodorizing filter from being deformed was provided between the prefilter and the deodorizing filter. This makes it possible to mount the deodorizing filter at a predetermined position of the air cleaning filter unit. As a result, all the air passing through the air cleaning filter unit passes through the deodorizing filter, and the original deodorizing effect of the filter can be expected, so that the deodorizing speed is high.
[0047]
In addition, the pre-filter was provided with the shape-preventing means on the surface on the side where the deodorizing filter was provided. Accordingly, the deodorizing filter can be mounted at a predetermined position of the air cleaning filter unit without using a member or the like that holds the deodorizing filter at a predetermined position in the frame. As a result, it is possible to reduce the cost and work time for preparing and attaching the holding member, and to further reduce the size of the air cleaning filter unit.
[0048]
Further, the shape prevention means is a projection for holding the deodorizing filter. As a result, the deodorizing filter is pressed by the projection, so that the deodorizing filter does not shift in the frame. Therefore, the deodorizing filter can be attached to a predetermined position of the air cleaning filter unit. As a result, all the air passing through the air cleaning filter unit passes through the deodorizing filter, and the original deodorizing effect of the filter can be expected, so that the deodorizing speed is high.
[0049]
In addition, a filter holding frame was disposed between the pre-filter and the deodorizing filter as the shape-preventing means. A special fixing device that attaches the deodorizing filter to the frame by placing each of the dust collecting filter and the deodorizing filter in this order in the frame and pressing the deodorizing filter against the hard flat surface of the dust collecting filter using the filter holding frame Is unnecessary. As a result, since the deodorizing filter does not lose its shape, all the air passing through the air purifying filter unit passes through the deodorizing filter, and the original deodorizing effect of the filter can be expected, so that the deodorizing speed is high.
[0050]
Further, in an air purifying filter unit including a pre-filter, a deodorizing filter, and a dust collecting filter in the frame, the pre-filter, the deodorizing filter, and the dust collecting filter are arranged in the frame from the air suction side. While arranging, a filter holding frame is arranged between the pre-filter and the deodorizing filter, and the filter holding frame, the deodorizing filter, and the dust collecting filter can be taken out from the frame of the air cleaning filter unit. In order to prevent the components inside the frame from falling off from the frame, a pre-filter is connected to the frame. Thereby, the deodorizing filter and the dust collecting filter can be easily attached to and detached from the air cleaning filter unit. As a result, the deodorizing filter can be removed, so that it can be washed with water or the like, and can be easily regenerated. Further, the dust collection filter can be easily replaced by itself, and when the dust collection filter needs to be replaced, it is not necessary to replace the entire air cleaning filter unit. Therefore, the running costs due to these exchanges can be reduced.
[0051]
Further, the filter holding frame has a projection on the surface on the side where the deodorizing filter exists. Thereby, since the filter is pressed by the protrusion, the filter holding frame and the deodorizing filter do not shift. Therefore, the deodorizing filter can be mounted at a predetermined position of the air cleaning filter unit, and the deodorizing filter does not lose its shape. As a result, all the air passing through the air cleaning filter unit passes through the deodorizing filter, and the original deodorizing effect of the filter can be expected, so that the deodorizing speed is high.
[0052]
In addition, the projection on the surface of the filter holding frame is shaped like a cross. As a result, the strength of the protruding portion can be improved, the force supporting the deodorizing filter can be improved, and it is possible to further suppress the displacement of the filter holding frame and the deodorizing filter. As a result, the original deodorizing effect of the filter can be expected, and the deodorizing speed is also increased.
[0053]
In addition, the deodorizing filter is formed such that the entire surface is uneven, and the projection of the filter holding frame is provided so as to correspond to the concave portion. Thereby, the filter holding frame and the deodorizing filter hardly shift, and the deodorizing filter can be reliably held at a predetermined position of the air cleaning filter unit. As a result, the original deodorizing effect of the filter can be expected more and more, and the deodorizing speed is further increased.
[0054]
Further, the pre-filter has a protrusion on a side surface, and the connection is made by inserting the protrusion into a locking hole provided in the frame from inside. This makes it possible to form an air cleaning filter unit by sequentially fitting the dust collecting filter, the deodorizing filter, the filter holding frame, and the pre-filter into the frame. As a result, the time and effort required for attaching and detaching the filter unit to and from the device at the time of maintenance and the like can be omitted, and workability can be improved.
[0055]
In addition, the protrusion on the side surface of the pre-filter protrudes outside the frame. Thereby, in the air cleaning filter unit, the bonding strength of the pre-filter to the frame body is increased, and further, when handling the filter unit, it is possible to put a finger on the projection. As a result, the filter unit can be easily attached to and detached from the device during maintenance and the like, and workability is also improved.
[0056]
Further, the present invention provides a housing having a concave storage portion for storing the air cleaning filter unit, and an edge of the concave filter storage portion, wherein the protrusion of the air cleaning filter unit is provided. The device is characterized in that a recess for finger hanging is provided at a position corresponding to. Accordingly, the protrusion of the pre-filter for forming the filter unit does not hinder the operation of storing the filter unit in the device, and it is easy to put a finger on the filter unit. As a result, the attachment / detachment of the filter unit to / from the device is facilitated, and the maintainability is also improved.
[Brief description of the drawings]
FIG. 1 is a front perspective view of a state in which components of an air cleaning filter unit according to a first embodiment of the present invention are disassembled. FIG. 2 is a front perspective view of an assembled state of the air cleaning filter unit shown in FIG. 3 is a front perspective view of a pre-filter of the air cleaning filter unit shown in FIG. 1; FIG. 4 is a schematic configuration diagram of a deodorizing filter of the air cleaning filter unit shown in FIG. 1 (a); b) Side view of the deodorizing filter [FIG. 5] Front perspective view of the dust collecting filter of the air purifying filter unit shown in FIG. 1 [FIG. 6] The filter holding frame of the air purifying filter unit shown in FIG. FIG. 7 is a front perspective view of the frame of the air cleaning filter unit shown in FIG. 1. FIG. 8 is a perspective view of the air cleaning filter unit shown in FIG. FIG. 9 is a side view showing a positional relationship between a filter and a filter holding frame. FIG. 9 is a front perspective view showing a state where a pre-filter of the air cleaning filter unit shown in FIG. 1 is connected to a frame. FIG. FIG. 11 is a front perspective view showing a situation in which the air purifying filter unit shown in FIG. 1 is combined with an air purifier. FIG. 12 is a front view showing the air purifying filter unit shown in FIG. FIG. 13 is a perspective view of a pre-filter of an air cleaning filter unit according to a second embodiment of the present invention as viewed from the side of a deodorizing filter. FIG. Partial cross-sectional side view of an air cleaning filter unit when a filter is used [Explanation of symbols]
REFERENCE SIGNS LIST 1 air cleaning filter unit 2 pre-filter 3 filter holding frame 4 deodorizing filter 5 dust collecting filter 6 frame 7 air purifier 23 projection 25 bar-shaped projection 33 bar-shaped projection 43 recess 64 locking hole 71 housing 72 filter Storage part 74 recess

Claims (11)

Pre-filter, deodorizing filter, in the air purifying filter unit equipped with a dust collection filter in the frame,
The pre-filter, the deodorizing filter, and the dust collecting filter are disposed in this order from the air suction side in the order of the air suction side, and a deodorizing filter shape preventing means is provided between the pre-filter and the deodorizing filter. Air purifying filter unit. 2. The air cleaning filter unit according to claim 1, wherein the shape-preventing means is formed on a surface of the pre-filter on which the deodorizing filter is provided. 3. The air purifying filter unit according to claim 2, wherein the shape-preventing means is a projection for holding the deodorizing filter. The air purifying filter unit according to claim 1, wherein a filter holding frame is provided between the pre-filter and the deodorizing filter as the shape-preventing means. Pre-filter, deodorizing filter, in the air purifying filter unit equipped with a dust collection filter in the frame,
In the frame, the pre-filter, the deodorizing filter, and the dust collection filter are arranged in this order from the air suction side, and a filter holding frame is provided between the pre-filter and the deodorizing filter, and a filter holding frame is provided. The deodorizing filter and the dust collecting filter can be removed from the frame of the air cleaning filter unit, and a pre-filter is coupled to the frame to prevent the components in the frame from falling off from the frame. An air purifying filter unit, characterized in that: The air purifying filter unit according to claim 5, wherein the filter holding frame includes a protrusion on a surface on a side where the deodorizing filter exists. The air purifying filter unit according to claim 6, wherein a projection on the surface of the filter holding frame has a cross-section. 8. The deodorizing filter according to claim 6, wherein the entire surface of the deodorizing filter is formed with irregularities, and a projection of the filter holding frame is provided so as to correspond to the concave portion. Filter unit for air purification. The said pre-filter is provided with the protrusion part on the side surface, The said connection is made by inserting this protrusion part into the locking hole provided in the said frame from the inside, The said connection is made. The air purifying filter unit according to any one of the above. The air purifying filter unit according to claim 9, wherein a protrusion on a side surface of the pre-filter protrudes outside the frame. A concave storage portion for storing the air purifying filter unit according to claim 10 is formed in the housing, and an edge of the concave filter storing portion is provided on the protrusion of the air cleaning filter unit. A device characterized by providing a finger hook recess at a corresponding position.

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