JP2011017493A - Air cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mounting feeling of an air cleaning filter, and to prevent the deterioration of dust collecting performance caused by a clearance gap between the air cleaning filter and a filter fixing section in an air cleaning device.SOLUTION: The air cleaning device includes an air cleaning means 5 disposed in a body case 4 having an air inlet 2 and an air outlet 3, and an air distributing means 6 disposed in an air trunk for sucking the indoor air into the body case 4 from the air inlet 2 and discharging the air indoors from the air outlet 3 through the air cleaning means 5, the air cleaning means 5 is formed of an air cleaning filter 7 and a filter fixing section 8, the air cleaning filter 7 is fitted in the filter fixing section 8, a support 9 is disposed at an air trunk leeward side of an upper inner face of the filter fixing section 8, and a holding section 10 is disposed at an air trunk windward side of a lower inner face of the filter fixing section 8, and a distance from the support 9 to a leeward side of the holding section 10 is longer than a distance from the support 9 to a windward side of the holding section 10.

Description

  The present invention relates to an air cleaning device capable of purifying air.

  The configuration of this type of conventional air cleaning apparatus is as follows.

  That is, a main body with a built-in fan motor, a filter fixing portion opened on one surface of the main body, a filter housed in the fixing portion, and a cover provided detachably so as to cover the front surface of the fixing portion. It was a composition.

  For example, a similar prior document is described in Patent Document 1 below.

JP 2009-034628 A

  The problem in the conventional example is that the feeling of wearing the air purifying filter is poor.

  That is, in the conventional product, the air purifying filter is configured to fit into the filter fixing portion, but there are a large size and a small size of the air purifying filter due to manufacturing variations, so the air purifying filter and the filter fixing portion There were cases where the gap between the two was small and large, and the wearing feeling varied.

  Therefore, an inclined rib is provided in the gap between the air purification filter and the filter fixing portion to absorb the gap between the air purification filter and the filter fixing portion.

  However, the air purifying filter and the filter fixing part are not completely blocked, and the dust collection performance is lowered.

  In view of the above, an object of the present invention is to improve the feeling of wearing the air purifying filter and prevent the dust collection performance from being deteriorated due to the gap between the air purifying filter and the filter fixing portion.

  In order to achieve this object, the present invention provides a main body case having an intake port and an exhaust port, air purifying means provided in the main body case, and indoor air from the intake port via the air purifying means. The air passage is provided with air blowing means for sucking air into the main body case and exhausting into the room through the exhaust port. The air cleaning means is formed of an air cleaning filter portion and a filter fixing portion, and the air cleaning filter portion is the filter. It is configured to fit in the fixed portion, and a fulcrum portion is provided on the leeward side of the one inner surface facing the filter fixing portion, a holding portion is provided on the leeward side of the other inner surface, and from the fulcrum portion to the leeward side portion of the holding portion. This distance is longer than the distance from the fulcrum part to the windward part of the holding part.

  This achieves the initial objective.

  As described above, the present invention provides a main body case having an intake port and an exhaust port, air purifying means provided in the main body case, and indoor air from the intake port through the air purifying means. The air cleaning means is formed of an air cleaning filter part and a filter fixing part, and the air cleaning filter part fits in the filter fixing part. The fulcrum portion is provided on the leeward side of the one inner surface facing the filter fixing portion, the holding portion is provided on the leeward side of the other inner surface, and the distance from the fulcrum portion to the leeward side portion of the holding portion is It is longer than the distance from the fulcrum part to the windward part of the holding part.

  That is, the air cleaning means is formed of an air cleaning filter portion and a filter fixing portion, and the air cleaning filter portion is configured to fit within the filter fixing portion. A fulcrum portion is provided on the leeward side of the one inner surface facing the filter fixing portion, and a holding portion is provided on the leeward side of the other inner surface. Since the distance from the fulcrum part to the leeward side of the holding part is longer than the distance from the fulcrum part to the leeward side of the holding part, when fitting the air purification filter part in the filter fixing part, first the air purification filter part One end of the filter is inserted into the filter fixing part and from the leeward side to the leeward side of the holding part of the filter fixing part, and then the other end opposite to one end of the air purification filter part is inserted from the leeward side to the fulcrum part of the filter fixing part. The outer peripheral surface of the air purifying filter portion is pressed against the inner surface of the filter fixing portion while pressing against the inner surface of the filter.

  As a result, the air purifying filter part rotates around the fulcrum part of the filter fixing part, one end of the air cleaning filter part comes into contact with the holding part of the filter fixing part, and the air cleaning filter part is a fulcrum of the filter fixing part. It is fixed between the part and the holding part.

  That is, when the dimension of the air purifying filter part is large, it is fixed by the fulcrum part and the leeward side part of the holding part, and when the dimension of the air cleaning filter part is small, the fulcrum part and the windward part of the holding part It is fixed by.

  As a result of these results, even if there are large or small dimensions of the air purification filter part, the feeling of wearing is almost constant and the feeling of wearing the air cleaning filter can be improved, and the air cleaning filter and the filter fixing part It is possible to prevent a decrease in dust collection performance due to the gap.

Schematic of the air cleaning device according to Embodiment 1 of the present invention. Schematic of the air cleaning device according to Embodiment 1 of the present invention. 1 is a schematic cross-sectional view of an air cleaning device according to a first embodiment of the present invention. 1 is a schematic cross-sectional view of an air cleaning device according to a first embodiment of the present invention. 1 is a schematic cross-sectional view of an air cleaning device according to a first embodiment of the present invention. Schematic cross-sectional enlarged view of the air cleaning device according to Embodiment 1 of the present invention.

  Hereinafter, the present embodiment will be described with reference to the accompanying drawings.

(Embodiment 1)
As shown in FIG. 1, FIG. 2, and FIG. 3, the air cleaning device 1 of the present embodiment includes a main body case 4 having an intake port 2 and an exhaust port 3, and an air cleaning means 5 provided in the main body case 4. I have. The main body case 4 has a substantially vertically long box shape, has a suction port 2 on the side surface on the front side, and has a substantially rectangular exhaust port 3 on the top surface. Air blowing means 6 is provided in the air passage that sucks indoor air from the air intake 2 into the main body case 4 through the air cleaning means 5 and exhausts the air into the room through the air outlet 3. The air blowing means 6 is provided on the air path downwind side of the air cleaning means 5. With the above configuration, the air in the room is sucked into the main body case 4 from the air inlet 2 by the air blowing means 6 and is exhausted into the room from the air outlet 3 through the air cleaning means 5.

  The feature in the present embodiment is the structure of the air cleaning means 5. Specifically, the air cleaning means 5 is formed of an air cleaning filter portion 7 and a filter fixing portion 8, and the air cleaning filter portion 7 is configured to fit inside the filter fixing portion 8.

  The air purifying filter portion 7 is fixed to a rectangular tube-shaped frame body portion having a substantially vertically long box shape and having a substantially vertically long rectangular opening, and a filter material portion folded in a wavy shape in the frame body portion.

  The filter fixing portion 8 is an opening having a substantially vertically long rectangular hole shape, and a fulcrum portion 9 is provided on the downwind side of the upper inner surface of the opening to provide an airflow on the lower inner surface of the opening of the filter fixing portion 8. A holding unit 10 is provided on the upper side.

  Here, the distance from the fulcrum part 9 to the leeward side part of the holding part 10 is longer than the distance from the fulcrum part to the leeward side part of the holding part.

  Thereby, the air purifying filter part 7 rotates around the fulcrum part 9 of the filter fixing part 8, and one end part of the air cleaning filter part 7 comes into contact with the holding part 10 of the filter fixing part 8. 7 is fixed between the fulcrum part 9 of the filter fixing part 8 and the holding part 10.

  That is, when the dimension of the air purification filter part 7 is large, it is fixed by the fulcrum part 9 and the leeward side part of the holding part 10, and when the dimension of the air purification filter part 7 is small, the fulcrum part 9 and the holding part. It is fixed by 10 upwind parts.

  As a result, even if there are large or small dimensions of the air purification filter unit 7, the feeling of wearing is almost constant, and the wearing feeling of the air cleaning filter unit 7 can be improved. It is possible to prevent a decrease in dust collection performance due to a gap between the filter 7 and the filter fixing portion 8.

  As shown in FIG. 3, the fulcrum portion 9 of the filter fixing portion 8 is a convex protrusion extending downward from the upper inner surface of the filter fixing portion 8. Specifically, the protrusion of the fulcrum portion 9 of the filter fixing portion 8 extends vertically downward with respect to the upper inner surface of the filter fixing portion 8, and this protrusion is a longitudinal section viewed from the side surface side of the main body case 4. The shape of the main body case 4 is substantially the same as the length between the left and right inner surfaces of the filter fixing portion 8. Here, when the air purification filter unit 7 is attached to the filter fixing unit 8, first, the lower end of the air purification filter unit 7 is connected to the filter fixing unit 8, and the leeward side of the holding unit 10 of the filter fixing unit 8 from the windward side. Next, the air purifying filter part 7 is pushed in along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the windward side, and further the fulcrum of the filter fixing part 8 The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8 while pressing against the protrusions that are the portions 9.

  Thereby, the air purifying filter part 7 rotates around the fulcrum part 9 of the filter fixing part 8, and one end part of the air cleaning filter part 7 comes into contact with the holding part 10 of the filter fixing part 8. 7 is fixed between the fulcrum part 9 of the filter fixing part 8 and the holding part 10.

  That is, since the fulcrum part 9 of the filter fixing part 8 is a convex protrusion extending downward from the upper inner surface of the filter fixing part 8, the lower end part of the air cleaning filter part 7 is connected to the filter fixing part 8 on the windward side. Is inserted into the holding part 10 of the filter fixing part 8 from the leeward side, and then the upper end part of the air cleaning filter part 7 is pushed in from the upwind side along the inner surface of the filter fixing part 8 to ensure the air cleaning. The upper end portion of the filter portion 7 can be pressed against a protrusion that is a fulcrum portion 9 of the filter fixing portion 8.

  In addition, the fulcrum part 9 should just stop in a predetermined position, when the air purifying filter part 7 inserts in the filter fixing | fixed part 8. FIG. That is, when a deodorizing filter or the like as a positioning member is mounted on the leeward side of the filter fixing portion 8 and the air purifying filter portion 7 stops at a predetermined position by the deodorizing filter or the like, the deodorizing filter or the like as a positioning member is supported as a fulcrum portion. A similar effect can be obtained with 9. The positioning member may be any member that is not deformed by the insertion force at the time of insertion by inserting the air cleaning filter portion 7 into the filter fixing portion 8.

  In addition, since the air purifying filter part 7 may be rotated before it hits the fulcrum part 9 due to friction when the air purifying filter part 7 runs along the upper inner surface of the filter fixing part 8, the upper inner surface of the filter fixing part 8 May be regarded as the fulcrum part 9.

  As shown in FIG. 3, the holding portion 10 of the filter fixing portion 8 is a concave protrusion that extends upward from the lower inner surface of the filter fixing portion 8. Specifically, the concave protrusion extends upward from the lower inner surface of the filter fixing portion 8 so as to gradually increase from the leeward side to the windward direction of the lower inner surface of the filter fixing portion 8. When the air purification filter unit 7 is mounted, the lower end of the air purification filter unit 7 is inserted into the filter fixing unit 8 from the upwind side to the leeward side of the holding unit 10 of the filter fixing unit 8, and then the air cleaning While pushing the upper end of the filter part 7 along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the windward side, and further pressing against the protrusion which is the fulcrum part 9 of the filter fixing part 8 The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8. Here, when the outer peripheral surface of the air purifying filter unit 7 rides on the concave projection that is the holding unit 10 of the filter fixing unit 8, the air cleaning filter unit 7 is a projection that is the fulcrum unit 9 of the filter fixing unit 8. And a concave projection that is the holding portion 10 of the filter fixing portion 8.

  That is, when the dimension of the air purifying filter part 7 is large, it is fixed by the fulcrum part 9 and the leeward side part of the concave projection that is the holding part 10, and when the dimension of the air purifying filter part 7 is small, The fulcrum part 9 and the holding part 10 can be fixed by the windward part of the concave projection.

  Moreover, as shown in FIG. 3, the protrusion which is the holding part 10 of the filter fixing | fixed part 8 is a substantially circular arc shape. Specifically, a substantially arc-shaped protrusion extends upward from the lower inner surface of the filter fixing portion 8 so as to gradually increase from the leeward side to the windward direction of the lower inner surface of the filter fixing portion 8. That is, the distance from the fulcrum part 9 of the filter fixing part 8 to the protrusion that is the holding part 10 of the filter fixing part 8 gradually increases from the leeward side of the lower inner surface of the filter fixing part 8 toward the windward side. When the air purification filter unit 7 is mounted, the lower end of the air purification filter unit 7 is inserted into the filter fixing unit 8 from the upwind side to the leeward side of the holding unit 10 of the filter fixing unit 8, and then the air cleaning While pushing the upper end of the filter part 7 along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the windward side, and further pressing against the protrusion which is the fulcrum part 9 of the filter fixing part 8 The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8. Here, the air purifying filter unit 7 is a fulcrum portion 9 of the filter fixing unit 8 by the outer peripheral surface of the air cleaning filter unit 7 riding on a substantially arc-shaped protrusion that is the holding unit 10 of the filter fixing unit 8. It is fixed by the protrusion and the substantially arc-shaped protrusion that is the holding portion 10 of the filter fixing portion 8.

  That is, when the dimension of the air purifying filter part 7 is large, it is fixed by the fulcrum part 9 and the leeward side part of the substantially arc-shaped protrusion which is the holding part 10, and when the dimension of the air purifying filter part 7 is small The fulcrum part 9 and the holding part 10 are fixed by the upwind side part of the substantially arc-shaped protrusion, and if the dimension of the air purifying filter part 7 is large and small, the fulcrum The portion 9 and the holding portion 10 can be fixed between the leeward side and the leeward side of the substantially arc-shaped protrusion.

  Further, as shown in FIG. 4, the distance from the corner on the windward leeward side in the longitudinal direction to the corner on the windward side in the longitudinal direction of the upper limit air purification filter unit 11 that is the upper limit dimension of the air purification filter unit 7. Is substantially the same as the distance from the fulcrum part 9 to the leeward side holding part which is the leeward side of the wind path of the holding part 10. Here, the upper limit air cleaning filter unit 11 has an upper dimension in manufacturing variation, that is, a maximum allowable dimension. Specifically, when the air purification filter unit 7 is attached to the filter fixing unit 8, the length in the longitudinal direction, which is the vertical direction of the air purification filter unit 7, and the horizontal direction from the wind path upwind to the wind path downwind The distance from the corner on the windward leeward side in the longitudinal direction to the corner on the windward side in the longitudinal direction of the upper limit air purifying filter portion 11 whose length is the upper limit dimension is the fulcrum portion of the filter fixing portion 8 The distance from 9 to the leeward side holding part, which is the leeward side of the wind path of the holding part 10 of the filter fixing part 8, is substantially the same.

  That is, when the upper limit air purification filter unit 11 that is the upper limit dimension of the air purification filter unit 7 is mounted, the lower end of the upper limit air purification filter unit 11 is held by the filter fixing unit 8 and the filter fixing unit 8 is held from the windward side. Inserted into the leeward side of the part 10, and then pushed the upper end of the upper limit air purifying filter part 11 along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the windward side, The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8 while being pressed against the protrusion that is the fulcrum portion 9 of the filter fixing portion 8. Here, when the outer peripheral surface of the upper limit air cleaning filter unit 11 rides on the protrusion of the leeward side holding unit that is the downwind side of the wind path that is the holding unit 10 of the filter fixing unit 8, the upper limit air cleaning filter unit 11 is a filter. The fixing portion 8 can be fixed by the protrusion that is the fulcrum portion 9 and the protrusion of the leeward side holding portion that is the airway leeward side that is the holding portion 10 of the filter fixing portion 8.

  Further, as shown in FIG. 5, the distance from the corner on the windward leeward side in the longitudinal direction to the corner on the windward side in the longitudinal direction of the lower limit air purification filter unit 12 that is the lower limit dimension of the air purification filter unit 7. Is substantially the same as the distance from the fulcrum part 9 to the windward holding part which is the wind path windward side of the holding part 10. Here, the lower limit air cleanliness filter part 12 is one whose outer dimension in manufacturing variation is the lower limit dimension, that is, the minimum allowable dimension. Specifically, when the air purification filter unit 7 is attached to the filter fixing unit 8, the length in the longitudinal direction, which is the vertical direction of the air purification filter unit 7, and the horizontal direction from the wind path upwind to the wind path downwind The distance from the corner on the windward leeward side in the longitudinal direction to the corner on the windward side in the longitudinal direction of the lower limit air purifying filter portion 12 whose length is the lower limit dimension is the fulcrum portion of the filter fixing portion 8 9 to approximately the same distance from the upwind holding unit which is the upwind side of the wind path of the holding unit 10 of the filter fixing unit 8.

  That is, when the lower limit air purification filter unit 12 which is the lower limit dimension of the air purification filter unit 7 is mounted, the lower end of the lower limit air purification filter unit 12 is held by the filter fixing unit 8 and the filter fixing unit 8 is held from the windward side. Inserted into the leeward side of the part 10, and then pushed in while keeping the upper end of the lower limit air purifying filter part 12 along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the upwind side, The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8 while pressing against the protrusion that is the fulcrum portion 9 of the filter fixing portion 8. Here, when the outer peripheral surface of the lower limit air cleaning filter unit 12 rides on the protrusion of the windward holding unit which is the windward upwind side which is the holding unit 10 of the filter fixing unit 8, the lower limit air cleaning filter unit 12 is a filter. The fixing portion 8 can be fixed by the protrusion that is the fulcrum portion 9 and the protrusion of the windward holding portion that is the windward upstream side that is the holding portion 10 of the filter fixing portion 8.

  Further, as shown in FIGS. 3, 5, and 6, a filter retaining portion 13 is provided on the windward side of the holding portion 10. Specifically, the projection is a flat plate-like protrusion that extends upward from the holding unit 10 on the windward side of the holding unit 10 of the filter fixing unit 8.

  That is, when the air purification filter unit 7 is mounted, the lower end of the air purification filter unit 7 is inserted into the filter fixing unit 8 from the windward side to the leeward side of the holding unit 10 of the filter fixing unit 8, Push the upper end of the air purifying filter part 7 along the inner surface of the filter fixing part 8 until it hits the fulcrum part 9 of the filter fixing part 8 from the windward side, and further press it into the protrusion that is the fulcrum part 9 of the filter fixing part 8 The outer peripheral surface of the air purifying filter portion 7 is pressed against the inner surface of the filter fixing portion 8 while being applied. Thereby, the air purifying filter part 7 rotates around the fulcrum part 9 of the filter fixing part 8, and one end part of the air cleaning filter part 7 comes into contact with the holding part 10 of the filter fixing part 8. 7 is fixed between the fulcrum part 9 of the filter fixing part 8 and the holding part 10. Here, the lower limit air purifying filter unit 12 is prevented from climbing on the projection of the windward holding unit that is the windward windward side that is the holding unit 10 of the filter fixing unit 8, and further overcoming the projection of the windward holding unit. can do.

  Further, as shown in FIGS. 3, 4, and 5, the upper portion of the filter fixing portion 8 is inclined toward the downwind side of the air path. More specifically, the upper wind path windward side upper end that is the wind path windward side of the upper part of the filter fixing unit 8 is more airflow than the lower wind path wind side upper end that is the upper side of the filter fixing part 8. It is inclined to the leeward side. That is, when the air purification filter unit 7 is attached to the filter fixing unit 8, the upper part of the air purification filter unit 7 is inclined more than the center of the main body than the lower part.

  That is, since the upper part of the air purification filter part 7 is inclined from the center of the main body rather than the lower part, when the air purification filter part 7 is attached to the filter fixing part 8, the air purification filter part 7 is separated from the filter fixing part 8 by gravity. It becomes difficult to come off.

  As described above, the present invention provides a main body case having an intake port and an exhaust port, air purifying means provided in the main body case, and indoor air from the intake port through the air purifying means. The air cleaning means is formed of an air cleaning filter part and a filter fixing part, and the air cleaning filter part fits in the filter fixing part. The fulcrum portion is provided on the leeward side of the one inner surface facing the filter fixing portion, the holding portion is provided on the leeward side of the other inner surface, and the distance from the fulcrum portion to the leeward side portion of the holding portion is It is longer than the distance from the fulcrum part to the windward part of the holding part.

  That is, the air cleaning means is formed of an air cleaning filter portion and a filter fixing portion, and the air cleaning filter portion is configured to fit within the filter fixing portion. A fulcrum portion is provided on the leeward side of the one inner surface facing the filter fixing portion, and a holding portion is provided on the leeward side of the other inner surface. Since the distance from the fulcrum part to the leeward side of the holding part is longer than the distance from the fulcrum part to the leeward side of the holding part, when fitting the air purification filter part in the filter fixing part, first the air purification filter part One end of the filter is inserted into the filter fixing part and from the leeward side to the leeward side of the holding part of the filter fixing part, and then the other end opposite to one end of the air purification filter part is inserted from the leeward side to the fulcrum part of the filter fixing part. The outer peripheral surface of the air purifying filter portion is pressed against the inner surface of the filter fixing portion while pressing against the inner surface of the filter.

  As a result, the air purifying filter part rotates around the fulcrum part of the filter fixing part, one end of the air cleaning filter part comes into contact with the holding part of the filter fixing part, and the air cleaning filter part is a fulcrum of the filter fixing part. It is fixed between the part and the holding part.

  That is, when the dimension of the air purifying filter part is large, it is fixed by the fulcrum part and the leeward side part of the holding part, and when the dimension of the air cleaning filter part is small, the fulcrum part and the windward part of the holding part It is fixed by.

  As a result of these results, even if there are large or small dimensions of the air purifying filter, the feeling of wearing the air purifying filter is almost constant, improving the feeling of wearing the air purifying filter, and improving the feeling of wearing the air purifying filter. In addition, it is possible to prevent a decrease in dust collection performance due to a gap between the air purifying filter and the filter fixing portion.

  Therefore, it is expected to be used as an air cleaning device for home use or office use.

DESCRIPTION OF SYMBOLS 1 Air purifier 2 Intake port 3 Exhaust port 4 Main body case 5 Air purifier 6 Air blower 7 Air purifying filter part 8 Filter fixing | fixed part 9 Supporting point part 10 Holding part 11 Upper limit air purifying filter part 12 Lower limit air purifying filter part 13 Filter removal Stop

Claims (8)

A main body case having an intake port and an exhaust port; air purifying means provided in the main body case; and indoor air from the intake port is sucked into the main body case, and the exhaust port is passed through the air purifying unit. The air passage further exhausted into the room is provided with air blowing means, the air cleaning means is formed of an air cleaning filter part and a filter fixing part, and the air cleaning filter part is configured to fit in the filter fixing part, and the filter fixing part A fulcrum part is provided on the downwind side of the upper inner surface of the air passage, a holding part is provided on the upper side of the airflow path of the lower surface of the filter fixing part, and the distance from the fulcrum part to the leeward side of the holding part is An air cleaning device longer than the distance from the fulcrum part to the windward side of the holding part. The air purifier according to claim 1, wherein the fulcrum portion of the filter fixing portion is a convex protrusion extending downward from an upper inner surface of the filter fixing portion. The air cleaning device according to claim 1, wherein the holding portion of the filter fixing portion is a concave protrusion extending upward from a lower inner surface of the filter fixing portion. The air cleaner according to claim 3, wherein the protrusion that is the holding portion of the filter fixing portion has a substantially arc shape. The distance from the corner on the windward leeward side in the longitudinal direction to the corner on the windward side in the longitudinal direction of the upper limit air purification filter unit, which is the upper limit dimension of the air purification filter unit, is determined by the wind of the holding unit from the fulcrum part. The air purifier according to claim 2, which is substantially the same as the distance to the leeward side holding portion that is the road leeward side. The distance from the corner on the leeward side of the longitudinal air path to the corner on the windward side of the longitudinal direction of the lower limit air purification filter unit, which is the lower limit dimension of the air purification filter unit, is determined by the wind of the holding unit from the fulcrum part. The air purifier according to claim 2, wherein the air purifier is substantially the same as the distance to the windward side holding portion that is the windward side of the road. The air purifier according to any one of claims 1 to 6, wherein a filter retaining portion is provided on the wind path upstream side of the holding portion. The air purifier according to any one of claims 1 to 7, wherein an upper portion of the filter fixing portion is inclined toward the downwind side of the air path.

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