JP2002345943A - Movable deodorizing filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a pressure loss is considerably large and the service life of a deodorizing sheet is short. SOLUTION: This device is composed of first and second take-up rolls 3 and 4 which are provided confronted near a blowout hole 2 on the outer surface of an air pass 1 and can be rotated around a central axis. A filter 5 for deodorization is held around the first take-up roll 3 for adsorbing smells while feeding out of the first take-up roll 3 by the rotations of the rolls 3 and 4. A sheet-like member 6 is provided with partially held filter 5 for deodorization by attaching both terminal of the first and second take-up rolls 3 and 4 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable deodorizing filter provided in an air passage of an air conditioner.

[0002]

2. Description of the Related Art FIG. 12 is a cross-sectional view of an air conditioner provided with a conventional movable deodorizing filter device disclosed in Japanese Patent Application Laid-Open No. H11-178905, as viewed from above. FIG.
FIG. 13 is a perspective view illustrating a configuration of a movable deodorizing filter device provided in the air conditioner illustrated in FIG. 12. FIG. 14 is a side sectional view showing the configuration of a regeneration unit provided in the movable deodorizing filter device shown in FIG. In the figure, 101 is a casing of an air conditioner, 102 is a suction port formed in the casing 101, 103 is an outlet formed in the casing 101, 104 is formed inside the casing 101, and is formed from the suction port 102 to the outlet 103. An air passage communicating with the air passage; 105, a pre-filter provided near the suction port in the air passage 104;
The fan 107 provided on the side of the air outlet 103 in FIG.
06 is an air purification unit provided between the air purifier and the air purifier.

In the air purifying section 107, 111a to 1
11e is the first to fifth deodorizing sheets, 112a and 11
Reference numeral 2b denotes first and second take-up rolls provided at predetermined intervals in the horizontal direction, and 113a to 113d are located at the first take-up roll 112a side and are provided at predetermined intervals in the vertical direction. First to fourth support rollers 113e to
113h is located on the side of the second take-up roll 112b, and the fifth to eighth support rollers provided at predetermined intervals in the vertical direction, 114a and 114b are the first to fourth support rollers 113a to 113d. , And first and second guide rollers 114c and 114d provided at a predetermined interval in the vertical direction are positioned beside the fifth to eighth support rollers 113e to 113h. Third and fourth guide rollers provided at predetermined intervals
Reference numeral 15 denotes a first to fifth deodorizing sheet 111a to 111e regenerating unit in which a second take-up roll 112b is provided inside, and a slit 115a through which the first to fifth deodorizing sheets 111a to 111e pass is formed on the side wall. It is.

First to fifth deodorizing sheets 111a to 111
1e is formed by supporting a powdery catalyst and an adsorbent on fibrillated polytetrafluoroethylene (PTFE), and rolling the sheet material into a sheet to cut it into a predetermined shape. I have.

[0005] The first to fifth deodorizing sheets 111a
The end portions are attached to the first and second winding rolls 112a and 112b, and the first to fifth guide rollers 114a and the first to fifth deodorizing sheets 111a to 111e are overlapped in order from the top. 2 guide rollers 11
4b and between the third guide roller 114c and the fourth guide roller 114d.

Also, the first to fifth deodorizing sheets 111a
To 111e are first to fourth support rollers 113a to 113e.
13d and fifth to eighth support rollers 113e to 113h
Are arranged at regular intervals, and reciprocate with the forward and reverse rotation of the first and second winding rolls 112a and 112b.

Next, the operation will be described. Fan 106
When air rotates, air flows into the air passage 104 from the suction port 102. The air that has flowed into the air passage 104 flows through the pre-filter 105, and at that time, suspended substances such as dust contained in the air are removed.

The air that has passed through the pre-filter 105 flows in the width direction while contacting each of the deodorizing sheets 111a to 111e, and at this time, odorous substances or harmful substances contained in the air are removed from the respective deodorizing sheets 111a to 111e. Is adsorbed and removed by the adsorbent.

The purified air from which odorous substances or harmful substances have been removed flows through the air passage 104 and flows out of the outlet 103.

When the odorous substance or the harmful substance is adsorbed for a predetermined time, the adsorbing ability of the adsorbent is reduced, so that the first and second winding rolls 112a and 112b are rotated forward at predetermined time intervals, and the The portions of the sheets 111a to 111e containing the adsorbent having reduced adsorption capacity are wound on the second winding roll 112b, while the deodorizing sheets 111a to 111e are wound.
The portion wound by the first winding roll 112a of 1e is set to the developed state.

The above-described winding operation is repeated, and each of the deodorizing sheets 111a to 111e is placed on the second winding roll 112.
When the sheet is completely wound around the sheet b, the reproducing unit 115 performs a reproducing process of each of the deodorizing sheets 111a to 111e.

When the regeneration process of each of the deodorizing sheets 111a to 111e is completed, the first and second winding rolls 112a
And 112b rotate in reverse, and each of the deodorizing sheets 111a to 111b
1e is wound around a first winding roll 112a.

[0013]

Since the conventional movable deodorizing filter device is constructed as described above, each of the deodorizing sheets 111a to 111e is always located in the air passage 104. Therefore, the pressure loss is large and each deodorizing sheet 11
There was a problem that the life of 1a to 111e was short.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a movable deodorizing filter device in which a deodorizing filter is located at an air outlet of an air passage of an air conditioner only during an operation start period. The purpose is to:

[0015]

SUMMARY OF THE INVENTION A movable deodorizing filter device according to the present invention is provided opposite to an air outlet on the outer surface of an air passage and is rotatable about a central axis.
And the odor substance is adsorbed around the first take-up roll and the first and second take-up rolls, which are housed around the first take-up roll and fed from the first take-up roll by rotation of the first and second take-up rolls. And a sheet-like member holding the deodorizing filter in a part thereof and having both ends attached to the first and second winding rolls, respectively.

A movable deodorizing filter device according to the present invention is provided near an air outlet on an upper outer surface of an air passage, and is rotatable around a central axis, and is folded on a lower inner surface of the air passage. A deodorizing filter that is stored and adsorbs odorous substances while being pulled up by the rotation of the winding roll, and a sheet-like member that holds the deodorizing filter in part and has an upper end attached to the winding roll. It is provided with.

A movable deodorizing filter device according to the present invention includes a louver for adjusting the direction of air blown from an air outlet, and a deodorizer that is housed on the back surface of the louver and adsorbs odorous substances while being separated from the back surface of the louver. And an application filter.

The movable deodorizing filter device according to the present invention is provided with a protrusion provided on the back surface of the louver and a position opposed to the protrusion, and the protrusion portion is provided when the deodorizing filter is stored on the back surface of the louver. And an opening of a filter for deodorization to enter.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. 1 and 2 are cross-sectional views showing the configuration of a movable deodorizing filter device according to Embodiment 1 of the present invention provided in an air passage of an air conditioner. FIG. 1 shows a state during the operation start period, and FIG. 2 shows a state during the normal operation period.
In the figure, reference numeral 1 denotes an air passage composed of a passage inside the air conditioning equipment main body, a duct connected to the air conditioning equipment main body, and the like.
Are the air outlets of the air passage 1, and 3 and 4 are provided near the air outlet 2 on the outer surface of the air passage 1 so as to face each other, and have a cylindrical shape and are rotatable around a central axis. Rolls,
Numeral 5 is stored around the first winding roll 3 and adsorbs odorous substances while being sent from the first winding roll 3 by rotation of the first and second winding rolls 3 and 4. The deodorizing filter 6 is a sheet-like member that partially holds the deodorizing filter 5 and has both ends attached to the first and second winding rolls 3 and 4, respectively.

The first and second winding rolls 3 and 4 include:
By simultaneously rotating and winding up the sheet-like member 6,
The deodorizing filter 5 is moved. The first and second winding rolls 3 and 4 are screwed to the upper and lower surfaces or the right and left surfaces of the air passage 1. The rotation of the first and second winding rolls 3 and 4 is manually performed by attaching a crank-shaped handle to the center axis of the first and second winding rolls 3 and 4, for example. A motor is connected to the center shaft of the second winding rolls 3 and 4 and driven by the motor. The air passage 1 is formed with an opening (not shown) through which the deodorizing filter 5 and the sheet-like member 6 pass.

As the deodorizing filter 5, for example, an activated carbon impregnated paper or a filter obtained by rolling activated carbon or an aromatic adsorbent on polytetrafluoroethylene (PTFE) to form a sheet is used.

Next, the operation will be described. Immediately before the start of operation, the first and second winding rolls 3 and 4 are rotated to send out the deodorizing filter 5 from the first winding roll 3 and to bring the filter to the air outlet 2 of the air passage 1. Therefore, during the operation start period, the deodorizing filter 5 is located at the outlet 2 of the air passage 1, and the odorous substance is adsorbed on the deodorizing filter 5. Therefore, a characteristic unpleasant odor is removed immediately after the start of operation. The operation start period is a period necessary to remove a characteristic unpleasant odor immediately after the start of operation, and is empirically determined to be 5 hours.
Minutes.

After the end of the operation start period, the first and second winding rolls 3 and 4 are rotated to store the deodorizing filter 5 around the first winding roll 3, and the deodorizing filter 5 is rotated. The portion of the sheet-shaped member 6 without the
Bring to. Therefore, the deodorizing filter 5 is not located at the outlet 2 of the air passage 1 during the normal operation period in which it is not necessary to remove the unpleasant odor. Therefore, the pressure loss between the inside of the air passage 1 and the outside of the air passage 1 during the normal operation period is reduced, whereby the air volume is increased and the noise is reduced. Further, the life of the deodorizing filter 5 is prolonged. Note that the normal operation period is a period after the operation start period.

As described above, according to the first embodiment, the first and second winding rolls 3 and 4 rotatable around the central axis are provided near the outlet 2 on the outer surface of the air passage 1. Opposite ends of a sheet-like member 6 holding a deodorizing filter 5 for adsorbing odorous substances in a part thereof are attached to first and second winding rolls 3 and 4, respectively.
And rotating the second winding rolls 3 and 4 to send out the deodorizing filter 5 housed in the first winding roll 3 from the first winding roll 3, and the outlet of the air passage 1. 2, the effect of removing the characteristic unpleasant odor immediately after the start of operation is obtained.

After the operation start period is over, the first and second winding rolls 3 and 4 are rotated to house the deodorizing filter 5 around the first winding roll 3. Therefore, the pressure loss between the inside of the air passage 1 and the outside of the air passage 1 during the normal operation period is reduced, thereby increasing the air volume, reducing the noise and extending the life of the deodorizing filter 5. The effect is obtained.

Embodiment 2 FIG. 3 and 4 are cross-sectional views showing the configuration of a movable deodorizing filter device according to Embodiment 2 of the present invention provided in an air passage of an air conditioner. FIG. 3 shows a state during the operation start period, and FIG. 4 shows a state during the normal operation period. Reference numeral 21 denotes an air passage constituted by a passage inside the air conditioner main body, a duct connected to the air conditioner main body, etc., 22 denotes an air outlet of the air passage 21, and 23 denotes an air passage 21.
A take-up roll 24 which is provided near the outlet 22 on the upper outer surface of the roll and has a cylindrical shape and is rotatable around a central axis;
Is stored in a folded state on the lower inner surface of the air passage 21 and absorbs odorous substances in a state where the filter is pulled up by the rotation of the take-up roll 23. The portion is a sheet-like member attached to the winding roll 23.

The take-up roll 23 rotates to take up the sheet member 25, thereby moving the deodorizing filter 24. The air passage 21 has an opening (not shown) through which the sheet-like member 25 passes.

Next, the operation will be described. Immediately before the start of operation, the winding roll 23 is rotated to remove the deodorizing filter 2.
4 is pulled up and brought to the outlet 22 of the air passage 21. Therefore, during the operation start period, the deodorizing filter 2 is used.
4 is located at the outlet 22 of the air passage 21, and the odorous substance is adsorbed on the deodorizing filter 24. Therefore, a characteristic unpleasant odor is removed immediately after the start of operation.

After the end of the operation start period, the winding roll 2
By rotating the filter 3, the deodorizing filter 24 is folded and stored in the lower inner surface of the air passage 21, and the portion of the sheet-like member 25 without the deodorizing filter 24 is brought to the outlet 22 of the air passage 21. For this reason, during the normal operation period in which it is not necessary to remove the unpleasant odor, the deodorizing filter 24 is connected to the air passage 21.
Is not located at the air outlet 22. Therefore, the pressure loss between the inside of the air passage 21 and the outside of the air passage 21 during the normal operation period is reduced, thereby increasing the air volume and reducing noise. Further, the life of the deodorizing filter 24 is prolonged.

As described above, according to the second embodiment, the winding roll 23 rotatable around the central axis is provided near the outlet 22 on the upper outer surface of the air passage 21 to adsorb odorous substances. The upper end of the sheet-like member 25 holding the deodorizing filter 24 in a part is attached to the winding roll 23, and the winding roll 23 is rotated just before the start of operation to be folded and stored on the lower inner surface of the air passage 21. The deodorizing filter 24 is pulled up and brought to the outlet 22 of the air passage 21. After the operation start period, the winding roll 23 is rotated to remove the deodorizing filter 2.
4 is folded and stored in the lower inner surface of the air passage 21, so that the same effect as in the first embodiment can be obtained.

Embodiment 3 5 and 6 are cross-sectional views showing a configuration of a movable deodorizing filter device according to Embodiment 3 of the present invention provided in an air passage of an air conditioner. FIG. 5 shows a state during the operation start period, and FIG. 6 shows a state during the normal operation period. FIG. 7 is a front view seen from the direction A in FIG.
6 is an enlarged view of a portion B in FIG. 6, and FIG. 9 is an enlarged view of a portion C in FIG. In the figure, 31 is an air passage constituted by a passage inside the air conditioning equipment main body, a duct connected to the air conditioning equipment main body, 32 is provided at an air outlet of the air passage 31, and 33 is provided at an air outlet 32 of the air passage 31. A pivot shaft 34 has one end attached to the pivot shaft 33 and rotates around the pivot shaft 33 to adjust the wind direction of the air blown from the outlet 32 of the air passage 31. 35 is a louver 34. Back surface 34a
And is a deodorizing filter that adsorbs odorous substances while being separated from the back surface 34a of the louver 34.

Reference numeral 36 denotes a support rod provided at the air outlet 32 of the air passage 31 to which one end of a deodorizing filter 35 is attached. Reference numeral 37 denotes a projection provided on the back surface 34a of the louver 34. Reference numeral 38 denotes a louver 34. The deodorizing filter 35 is formed at a position facing the projection 37 and is attached to the back surface 34 of the louver 34.
An opening 39 of the deodorizing filter 35 into which the protrusion 37 enters when stored in the a. A decoupling rod 39 for separating the deodorizing filter 35 from the back surface 34a of the louver 34.

Further, in the separating rod 39, 39a
Is disposed on the surface of the deodorizing filter 35 by screwing or the like, and is disposed in the width direction of the deodorizing filter 35 (the direction of the arrow in FIG. 9).
A thin plate portion having an elongated shape, 39b is a deodorizing filter 35
Filter 35 having a diameter equal to or smaller than the diameter of the opening 38 of the filter.
Into the opening 38 of the louver 34 and press the projection 37 of the louver 34, and from the projection 37 of the louver 34
Is a pressing portion that separates the opening 38 of the opening.

A deodorizing filter 35 is provided on each louver 34. The deodorizing filter 35 is manually or motor-driven, for example, by fitting the opening 38 of the deodorizing filter 35 into the projecting portion 37 of the louver 34 to thereby form the louver 34.
Is stored on the back surface 34a. As shown in FIG. 10, the deodorizing filter 35 is pressed by the separating rod 39 by moving the separating rod 39 in the width direction of the deodorizing filter 35 (in the direction of the arrow in FIG. 10), for example, manually or by driving a motor. The protrusion 37 of the louver 34 is pressed by the portion 39b, and the opening 3 of the deodorizing filter 35 is
8 is separated from the back surface 34 a of the louver 34.

Next, the operation will be described. Immediately before the start of the operation, the removing rod 39 is moved in the width direction of the deodorizing filter 35 (in the direction of the arrow in FIG. 9), and the protrusion 3
7, the opening 38 of the deodorizing filter 35 is cut off, so that the deodorizing filter 35 is connected to the back surface 34a of the louver 34.
, And the deodorizing filter 35 is disposed at the outlet 32 of the air passage 31. Therefore, during the operation start period, the deodorizing filter 35 is located at the outlet 32 of the air passage 31, and the odorous substance is adsorbed on the deodorizing filter 35. Therefore, a characteristic unpleasant odor is removed immediately after the start of operation.

After the end of the operation start period, the opening 38 of the deodorizing filter 35 is fitted into the projection 37 of the louver 34 so that the deodorizing filter 35 is attached to the back surface 34 of the louver 34.
Store in a. For this reason, during the normal operation period in which it is not necessary to remove the unpleasant odor, the deodorizing filter 35 is connected to the air passage 3.
It is not located at the first outlet 32. Therefore, the pressure loss between the inside of the air passage 31 and the outside of the air passage 31 during the normal operation period is reduced, whereby the air volume is increased and the noise is reduced. Further, the life of the deodorizing filter 35 is prolonged.

As described above, according to the third embodiment, the deodorizing filter for adsorbing the odorous substance is provided on the louver 34, and the deodorizing filter 35 stored on the back surface 34a of the louver 34 immediately before the start of operation. Back surface 34a of louver 34
And the deodorizing filter 5 is arranged at the air outlet 32 of the air passage 31 and the deodorizing filter 35 is stored in the back surface 34a of the louver 34 after the operation start period. The same effect as in the first embodiment can be obtained.

Hereinafter, the effect of the case where the deodorizing filter is disposed at the outlet of the air passage during the operation start period will be described. FIG. 11 shows the result of monitoring the aldehyde concentration in a specific room using an air conditioner that blows air to a plurality of rooms through a duct. In FIG. 11, a curve a shows the result when the deodorizing filter is arranged at the outlet of the air passage, and a curve b shows the result when the deodorizing filter is not arranged at the outlet of the air passage. The vertical axis indicates the aldehyde concentration (ppb), and the horizontal axis indicates time (minute). When the operation is started (the operation is started from 5 minutes on the horizontal axis in FIG. 11), if the deodorizing filter is not arranged, the aldehyde accumulated in the duct before the operation is started is blown into the room at a stroke. As shown by, the aldehyde concentration exceeded 30 ppb for several minutes from the start of the operation. On the other hand, when the deodorizing filter is provided, the state before the start of operation can be maintained as shown by the curve a.

[0039]

As described above, according to the present invention, the first and second winding rolls provided opposite to the air outlet on the outer surface of the air passage and rotatable around the central axis are provided. A deodorizing filter that is housed around the first winding roll, and that adsorbs odorous substances in a state of being sent from the first winding roll by rotation of the first and second winding rolls; Since the movable deodorizing filter device is configured so as to hold the deodorizing filter in a part and to include a sheet-shaped member having both ends attached to the first and second winding rolls, respectively, a feature is provided immediately after the start of operation. This has the effect of obtaining a movable deodorizing filter device that removes unpleasant odors. Further, the pressure loss between the inside of the air passage and the outside of the air passage during the normal operation period is reduced, whereby the air volume is increased and the movable deodorizing filter device which reduces noise is obtained. Further, there is an effect that a movable deodorizing filter device in which the life of the deodorizing filter is prolonged can be obtained.

According to the present invention, the winding roll is provided on the upper outer surface of the air passage near the air outlet, and is rotatable around the center axis. Movable to include a deodorizing filter that adsorbs odorous substances while being pulled up by the rotation of the roll, and a sheet-like member that holds the deodorizing filter in part and has an upper end attached to the winding roll. Since the deodorizing filter device is configured, there is an effect that a movable deodorizing filter device that removes a characteristic unpleasant odor immediately after the start of operation is obtained. Further, the pressure loss between the inside of the air passage and the outside of the air passage during the normal operation period is reduced, whereby the air volume is increased and the movable deodorizing filter device which reduces noise is obtained. Further, there is an effect that a movable deodorizing filter device in which the life of the deodorizing filter is prolonged can be obtained.

According to the present invention, there is provided the louver for adjusting the wind direction of the air blown out from the outlet, and the deodorizing filter housed on the back surface of the louver and adsorbing the odorous substance while being separated from the back surface of the louver. Since the movable deodorizing filter device is configured as described above, there is an effect that a movable deodorizing filter device in which a characteristic unpleasant odor is removed immediately after the start of operation is obtained. Further, the pressure loss between the inside of the air passage and the outside of the air passage during the normal operation period is reduced, whereby the air volume is increased and the movable deodorizing filter device which reduces noise is obtained. Further, there is an effect that a movable deodorizing filter device in which the life of the deodorizing filter is prolonged can be obtained.

According to the present invention, the projection provided on the back surface of the louver and the deodorization filter formed at a position facing the projection and into which the projection enters when the deodorization filter is stored on the back surface of the louver. Since the movable filter device is configured to have the opening, there is an effect that a movable deodorizing filter device capable of easily storing the deodorizing filter on the back surface of the louver is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a movable deodorizing filter device according to Embodiment 1 of the present invention in a state during an operation start period.

FIG. 2 is a cross-sectional view showing a configuration of a movable deodorizing filter device according to Embodiment 1 of the present invention in a state of a normal operation period.

FIG. 3 is a cross-sectional view showing a configuration of a movable deodorizing filter device according to Embodiment 2 of the present invention in a state during an operation start period.

FIG. 4 is a cross-sectional view showing a configuration of a movable deodorizing filter device according to Embodiment 2 of the present invention in a state of a normal operation period.

FIG. 5 is a cross-sectional view showing a configuration of a movable deodorizing filter device according to Embodiment 3 of the present invention in a state of an operation start period.

FIG. 6 is a sectional view showing a configuration of a movable deodorizing filter device according to Embodiment 3 of the present invention in a state of a normal operation period.

FIG. 7 is a front view as viewed from a direction A in FIG. 6;

8 is an enlarged view of a portion B in FIG.

FIG. 9 is an enlarged view of a portion C in FIG. 6;

FIG. 10 is a diagram for explaining the operation of a movable deodorizing filter device according to Embodiment 3 of the present invention.

FIG. 11 is a diagram for explaining an effect when the deodorizing filter is arranged at the outlet of the air passage.

FIG. 12 is a cross-sectional view as viewed from above showing a configuration of an air conditioner provided with a conventional movable deodorizing filter device disclosed in Japanese Patent Application Laid-Open No. H11-178905.

13 is a perspective view showing a configuration of a movable deodorizing filter device provided in the air conditioner shown in FIG.

14 is a side sectional view showing a configuration of a regeneration unit provided in the movable deodorizing filter device shown in FIG.

[Explanation of symbols]

1,21,31 air passage, 2,22,32 outlet,
3 First take-up roll, 4 Second take-up roll, 5, 24, 35 Deodorizing filter, 6, 25 sheet member, 23 Take-up roll, 33 Rotating shaft, 34
Louver, 34a back surface, 36 support rod, 37 protrusion, 3
8 Opening, 39 Separating rod, 39a Thin plate part, 3
9b Pressing part.

Continued on the front page F term (reference) 4C080 AA05 BB02 CC01 HH05 JJ06 KK08 LL10 QQ01 QQ11 QQ20 4D012 CA09 CB03 CC20 CG01 CG03 CK07

Claims (4)

[Claims] 1. A movable deodorizing filter device provided in an air passage having an air outlet, wherein a first and a second air filter are provided opposite to the air outlet on an outer surface of the air passage and rotatable around a central axis. A second take-up roll, housed around the first take-up roll,
And a deodorizing filter that adsorbs an odorous substance while being fed from the first winding roll by the rotation of the second winding roll; And a sheet-like member attached to the first and second winding rolls. 2. A movable deodorizing filter device provided in an air passage having an air outlet, comprising: a winding roll provided near an air outlet on an upper outer surface of the air passage and rotatable around a central axis. A deodorizing filter that is folded and stored on the lower inner surface of the air passage, and that absorbs an odorous substance while being pulled up by the rotation of the winding roll; And a sheet-like member attached to the winding roll. 3. A movable deodorizing filter device provided in an air passage having an air outlet, comprising: a louver for adjusting a wind direction of air blown out from the air outlet; A movable filter device comprising: a deodorizing filter that adsorbs odorous substances in a separated state. 4. A projection provided on the back surface of the louver, and a projection formed at a position facing the projection, wherein the projection enters when the deodorization filter is stored on the back of the louver. The movable filter device according to claim 3, further comprising an opening.