JP2002240550A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate deviation of ventilation quantity passing a deodorizing filter 28, and secure a deodorizing function. SOLUTION: In sending air from either one opened introducing port of an outside air introducing port 18 and an inside air introducing port 19 through the deodorizing filter 28, an upstream side surface of the deodorizing filter 28 to air is formed as a flat or dented surface to an air flow from the opened introducing port. In a semi-deodorizing state where the deodorizing filter 28 is exposed about by half at the introducing port, part of air introduced from the opened introducing port first invades into a dent in an upper surface of the deodorizing filter 28, and then goes from there to pass through the whole surface of the deodorizing filter 28 uniformly. Deviation of ventilation quantity in passing the deodorizing filter 28 is thus eliminated, and deodorizing performance of the whole deodorizing filter 28 is achieved to improve deodorizing performance. Since air uniformly passes the whole surface of the deodorizing filter 28, deodorizing performance can be maintained for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle which combines an inside / outside air switching function and a deodorizing filter function.

[0002]

2. Description of the Related Art The applicant of the present invention has previously filed an application for Japanese Patent Application Laid-Open No. 11-192831 as a vehicle air conditioner. In the prior application device, a deodorizing filter that adsorbs a malodorous component from the passing air is provided in the inside / outside air switching device so as to be displaceable, and when it is determined that deodorization of the introduced air is necessary based on a detection signal of an odor sensor or the like, the corresponding The introduced air is deodorized by displacing the filter for deodorization to the side of the inlet port for taking in the air and passing the introduced air.

[0003]

However, in the above-mentioned prior application, a gap is provided between the wall portion of the inside / outside air switching door and the deodorizing filter to allow air to pass therethrough. Although it is considered that the air passes through the gap and passes through the entire surface of the deodorizing filter as much as possible, in actuality, the ventilation amount is biased near the opening of the gap, and the deodorizing performance of the entire deodorizing filter is not sufficiently utilized. In addition, there is a problem that the deodorizing performance decreases from a portion having a large amount of ventilation, and sufficient deodorizing performance cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner for a vehicle which can maintain a deodorizing function by eliminating a bias in a ventilation amount when passing through a deodorizing filter. It is in.

[0005]

In order to achieve the above object, the present invention employs the following technical means.

According to the first aspect of the present invention, when the air from the opened inlet is passed through the deodorizing filter (28), the air flowing from the opened inlet is reduced by the air of the deodorizing filter (28). It is characterized in that the upstream side surface is a flat surface or a concave surface.

Thus, even in a semi-deodorized state in which the deodorizing filter is exposed to about half of the inlet, a part of the air introduced from the opened inlet first enters the recess on the upper surface of the deodorizing filter, and deodorizes therefrom. Since the air passes through the entire surface of the filter evenly, the air flow when passing through the deodorizing filter is not biased, and the deodorizing performance of the entire deodorizing filter is utilized to improve the deodorizing performance. In addition, since the air uniformly passes through the entire surface of the deodorizing filter, the deodorizing performance is maintained for a long time.

[0008] According to a second aspect of the present invention, the deodorizing filter (28) is characterized in that it is arranged in a V-shape in which the center is depressed in the direction of the rotation center (16).

Thus, as in the first aspect, even in a semi-deodorized state in which the deodorizing filter is exposed about half to the inlet, a part of the air introduced from the opened inlet is limited.
First, the air enters the space between the two deodorizing filters arranged in a V-shape, and then uniformly passes through the entire surface of the deodorizing filters on both sides. Is eliminated, and the deodorizing performance of the entire deodorizing filter is utilized to improve the deodorizing performance. In addition, since air passes uniformly through the entire surface of the deodorizing filter,
Deodorization performance will be maintained for a long time.

[0010] Further, the deodorizing filter of the prior application is an arc-shaped filter along the circumferential wall of the rotary door, but can be composed of two flat filters, so that the filter as a single unit can be easily manufactured. In addition, the area of the filter is increased, the deodorizing performance and the life are improved, and since the filter passes through a wide area, the ventilation resistance is reduced. In addition, by adopting a structure of two flat filters or a structure in which two flat filters can be folded in two by attaching a hinge portion, the filter itself can be handled compactly and can be easily attached to and detached from the apparatus.

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 are longitudinal sectional views of a blower unit 10 in a vehicle air conditioner according to a first embodiment. FIG. 1 shows a sectional structure in a lateral direction of a vehicle, and FIG. 2 shows the cross-sectional structure of the device. This blower unit 1
Numeral 0 is mounted on the front side of the passenger seat below the instrument panel installed in the front part of the vehicle compartment, and the inside / outside air switching device 11 is arranged on the upper side when the vehicle is mounted. The blower 12 is arranged on the lower side. The two parts 11 and 12 are integrally connected to form a single unit.

The inside / outside air switching device 11 has an inside / outside air switching box 13 made of resin, and an arc-shaped circumferential wall surface 17 (see FIG. 2) is formed on an upper portion thereof. 17
Is a rotary door 14 and a filter holding member 15 described later.
Are formed in the shape of an arc centered on the rotation center 16.
An outside air introduction port 18 for introducing outside air is opened in a portion of the circumferential wall surface 17 on the front side of the vehicle, and inside air is introduced into a portion of the circumferential wall surface 17 on the vehicle rear side (occupant side). The inside air inlet 19 is open.

Next, the rotary door 14 and the filter holding member 15 will be described. Both of them 14 and 15 are integrally formed of resin, and the rotary door 14 constitutes an inside / outside air switching door. Rotation center 16
And an arc-shaped circumferential wall 14a centered at the center. The circumferential wall 14a is arranged on the inner circumferential side of the arcuate circumferential wall 17 and is formed to have an area larger than the opening area of the outside air inlet 18 and the inside air inlet 19. Therefore, the two inlets 18 and 19 can be opened and closed by the rotation of the circumferential wall 14a. In this example, both the inlets 1 and 19 are opened by the circumferential wall 14a.
A wall for opening and closing 8, 19 is configured.

The rotary door 14 has a side plate 14b at one axial end (left end in FIG. 1). As shown in FIG. 2, the side plate 14b has a fan-like shape that hangs down from the circumferential wall 14a to the inner peripheral side, and a column-shaped rotary shaft 14c having the rotation center 16 is provided at an important position of the fan. It is integrally formed so as to protrude outward in the direction. The rotary shaft 14c is loosely inserted into a bearing hole 22 provided in a side wall on the left side of the vehicle of the inside / outside air switching box 13, and is rotatably supported.

On the other end of the rotary door 14 in the axial direction (right end in FIG. 1), there is formed an arc-shaped side plate 14d which hangs from the circumferential wall 14a to the inner circumferential side by a small dimension. A cylindrical support shaft 14e projecting outward in the axial direction is also integrally formed with the arc-shaped side plate 14d. This support shaft 14
e is loosely inserted into an arc-shaped bearing groove 23 provided on a side wall on the right side of the vehicle of the inside / outside air switching box 13 and is slidably supported. The maximum rotation range (rotation angle) of the rotary door 14 is determined by the circumferential angle of the arc-shaped bearing groove 23.

A seal member 26 made of an elastic material such as rubber is fixed to the outer peripheral surface of the circumferential wall 14a by bonding or the like.
The seal member 26 is provided between the outside air inlet 18 and the inside air inlet 19.
Has a square (rectangular) frame shape corresponding to the opening edge of the opening. On the other hand, the arc-shaped circumferential wall surface 17 of the inside / outside air switching box 13
A protruding rib 27 having a triangular cross section is formed integrally with the outside air introduction port 18 and the inside air introduction port 19 and protrudes toward the inner peripheral side along the edge of the opening.

The projecting rib 27 and the sealing material 26
By pressing the outside air inlet 18 or the inside air inlet 19 with the arc-shaped circumferential wall surface 17 reliably,
It is possible to prevent inconveniences such as mixing of inside air into outside air and mixing of outside air into inside air.

Next, the filter holding member 15 is configured to be housed on the inner peripheral side of the circumferential wall 14a of the rotary door 14, and has a built-in deodorizing filter 28. However, since the filter holding member 15 does not perform the function of switching between the inside and outside air, it does not have a circumferential wall corresponding to the circumferential wall 14a.

A side plate 15a is formed at one end of the filter holding member 15 in the axial direction. This side plate 15a
Is integrally formed with a cylindrical support shaft 15b protruding outward in the axial direction. This support shaft 15b is a rotary door 1
4 is an arc-shaped bearing groove 2 formed in the fan-shaped side plate 14b.
9 is loosely inserted into and supported slidably. The maximum rotation range (rotation angle) of the filter holding member 15 is determined by the circumferential angle of the arc-shaped bearing groove 29.

A side plate 15c is formed at the other end of the filter holding member 15 in the axial direction. This side plate 1
5c is substantially Y-shaped as shown in FIG. 2, and hangs radially inward from a position on the inner peripheral side of the support shaft 14e of the rotary door 14. A cylindrical rotating shaft 15d having the rotation center 16 at the lower end of the substantially Y-shape is integrally formed so as to protrude outward in the axial direction. The rotary shaft 15d is loosely inserted into a bearing hole 30 provided in a side wall of the inside / outside air switching box 13 on the right side of the vehicle, and is rotatably supported.

Next, the support structure of the deodorizing filter 28 to the filter holding member 15, which is a main part of the present invention, will be described in detail.

As shown in FIG. 2, in the filter holding member 15 having a substantially Y-shape when viewed from the side, a frame portion 15e supporting a part of the side and lower surface of the deodorizing filter 28 is provided on each of two upper sides. Ventilation window 15f surrounded by frame 15e
Are formed. The deodorizing filter 28 has a substantially V-shape and is detachably built in the filter holding member 15 by being fitted and supported in the frame portion 15e.

By the way, the above-mentioned deodorizing filter 28
A deodorizer (activated carbon or the like) that adsorbs malodorous components in the outside air (eg, a diesel exhaust gas odor component such as acetaldehyde) is supported on a porous filter base material such as urethane foam with an appropriate binder. is there.
As the binder, an acidic binder is preferable in order to improve the adsorption efficiency of the exhaust gas odor component. The filter area is increased by folding the porous filter substrate supporting the deodorant in a corrugated (corrugated) manner.
Further, the periphery of the corrugated porous filter base material is held by a frame made of resin or the like, and two flat filters are connected by a hinge portion 28a. However, this does not cause any problem even if the filter is divided into two flat filters.

As a result, even in a semi-deodorized state in which the deodorizing filter 28 is exposed to about half of the inlet, a part of the air introduced from the opened inlet is first deodorized on the two surfaces arranged in a V-shape. Get into the space between the filters 28,
From there, the air uniformly passes through the entire surface of the deodorizing filters 28 on both sides, so that the air flow when passing through the deodorizing filter 28 is not biased, and the deodorizing performance of the entire deodorizing filter 28 is utilized to improve the deodorizing performance. . In addition, since air passes uniformly over the entire surface of the deodorizing filter 28,
Deodorization performance will be maintained for a long time.

Further, the deodorizing filter 28 of the prior application is an arc filter along the circumferential wall 14a of the rotary door 14, but it can be composed of two flat filters. In addition, the area of the filter increases, the deodorizing performance and the service life are improved, and since the filter passes through a wide area, the ventilation resistance is reduced. In addition, a configuration in which two flat filters are used, or a hinge portion 28a
By attaching the filter to a structure in which the two flat filters can be folded in two, the filter itself can be handled compactly, and can be easily attached to and detached from the device.

Numeral 31 denotes a dust filter, as shown in FIGS. 1 and 2, inside the inside / outside air switching box 13, the rotary shafts 14c and 15d of the rotary door 14 and the filter holding member 15.
, That is, on the exit side of the inside / outside air switching box 13.

At the outlet side of the inside / outside air switching box 13, the filter support wall 32 located axially inside the sector side plate 14 b of the rotary door 14, and the axial direction of the substantially Y-shaped side plate 15 c of the filter holding member 15. The filter support wall 33 located inside is integrally formed. The dust filter 31 has a rectangular shape that can be inserted between the two filter support walls 32 and 33 and the two side walls of the inside / outside air switching box 13 in the vehicle front-rear direction. Projecting pieces 32a, 33 for supporting the lower surface of the dust filter 31 on two side walls in the vehicle front-rear direction of the inside / outside air switching box 13, respectively.
a, 34 are formed.

Therefore, these projecting pieces 32a, 33a,
By mounting the dust filter 31 on the top 34, the dust filter 31 is rotated by the rotating shaft 14 c in the inside / outside air switching box 13,
It is detachably incorporated at a position near 15d (in other words, at the outlet side of the inside / outside air switching box 13 and immediately before a blower inlet 36 described later).

The dust filter 31 is for removing dust from inside air or outside air introduced into the inside / outside air switching box 13. For example, a filter medium such as filter paper or porous urethane foam is corrugated (wavy). By folding the fold, the area of the filter is increased, and the periphery of the corrugated filter medium is held by a frame made of resin or the like. Since the dust filter 31 can be made of a simple filter medium that does not carry a deodorizing agent, the ventilation resistance (pressure loss) can be greatly reduced as compared with the deodorizing filter 28.

Next, the blower 12 will be described. The blower 12 is a centrifugal multi-blade blower, and has a well-known scroll-shaped resin blower casing 35. A bell mouth-shaped suction port 36 is opened in the upper central part. Centrifugal multi-blade fan (sirocco fan) 37 that blows the intake air from the intake port 36
Are disposed in the blower casing 35.

Here, the fan 37 is arranged so that its rotation axis is directed in the up-down direction of the vehicle, and the air blown by the fan 37 changes its direction by 90 ° when passing through the fan 37 and is blown outward in the radial direction. You. In this example, the casing 3
An air outlet portion (not shown) of No. 5 is set in the right direction of the vehicle in FIG.

A motor 38 for rotating and driving the fan 37 is disposed so as to penetrate the bottom 35a of the blower casing 35, and a mounting flange 39 provided on the motor 38.
The motor 38 is connected to the bottom 3 of the blower casing 35
5a.

An air inlet of the air conditioning unit 40 is connected to an air outlet of the blower casing 35. As is well known, the air conditioning unit 40 includes a refrigerant evaporator (heat exchanger for cooling) 40a, a hot water heater core (heat exchanger for heating) 40
b, temperature adjusting air mix door (temperature adjusting means) 40
c, bypass path 40d of heater core 40b, outlet mode switching door mechanism (not shown), face, defroster,
Various outlets (not shown) of the foot and the like are installed.

FIG. 3 is a block diagram of the electric control according to the present embodiment. The air-conditioning electronic control unit (ECU) 41 comprises a microcomputer or the like. The air conditioner is controlled according to a preset program. The ECU 41 is supplied with power from a vehicle-mounted battery (not shown) when an ignition switch (not shown) of the vehicle engine is turned on.

The ECU 41 receives a sensor signal from a well-known sensor group 42 and an operation signal from an air-conditioning operation panel 43 installed in the instrument panel of the passenger compartment. In the sensor group 42, the sensors related to the electric control according to the present embodiment will be described. The vehicle exterior odor sensor 4 that detects the vehicle exterior odor component (such as the diesel exhaust gas odor component outside the vehicle interior).
5, and odor components in the vehicle interior (tobacco odor components in the vehicle interior, etc.)
Is provided with a vehicle interior odor sensor 46 for detecting the odor.

The various types of air conditioners controlled by the ECU 41 will also be described if they relate only to the electric control of this embodiment. The servo motor 47 for controlling the amount of rotation of the rotary door 14 and the amount of rotation of the filter holding member 15 are controlled. The servo motor 48 is provided. The output shafts of these servomotors 47 and 48 are connected to the rotation shaft 14c of the rotary door 14 and the rotation shaft 15d of the filter holding member 15 via an appropriate link mechanism or the like. That is,
In this example, the two rotating members 14 and 15 provided in the inside / outside air switching device 11 are provided with servo motors 47 and 48 as actuators independently of each other.

Next, the operation of this embodiment in the above configuration will be described.

FIGS. 4 and 5 are flowcharts showing the control by the ECU 41. In the state where the ignition switch is turned on and power is supplied to the ECU 41, FIG.
Air conditioning operation switch (not shown) on air conditioning operation panel 43
Is started, the control routine of FIG. 4 is started, and each initialization and initial setting are performed in step 100.
In the next step 110, the set temperature set by the temperature setting switch of the operation panel 43 for air conditioning is input.

Then, in the next step 120, a signal obtained by A / D converting the value of the sensor group 42 is read. And
In the next step 130, a target outlet temperature (TAO) into the vehicle compartment is calculated based on a mathematical expression stored in the ROM in advance.

Next, at step 140, the applied voltage (blower voltage) of the blower motor 38 corresponding to the TAO is calculated from a map (not shown) stored in the ROM in advance. Then, in the next step 150, a blowing mode corresponding to the TAO is determined from a map (not shown) stored in the ROM in advance. Here, in the determination of the blowing mode, the TAO is determined to be a face mode, a bi-level mode, a foot mode, and a foot differential mode from the lower to the higher TAO.

In this embodiment, the operation panel 4
By operating a defroster switch (not shown) provided on 3, the defroster mode is forcibly set. Then, in step 160, the target opening (SW) of the temperature control air mix door 40c in the air conditioning unit 40 is
It is calculated based on a mathematical expression stored in the ROM in advance.

Then, in the next step 170, the inside / outside air suction mode by the inside / outside air switching device 11 is determined. The determination of the inside / outside air suction mode will be described later with reference to FIG. In the next step 180, the evaporator 4
0a of the compressor (not shown) of the refrigeration cycle including
OFF is determined based on a detection value of an outside air temperature sensor (not shown) and a detection value of a post-evaporator temperature sensor.

Next, the process proceeds to step 190, and the air conditioners such as the servo motors 47 and 48 and the blower motor 38 are provided so that the modes calculated or determined in the above steps 140 to 180 are obtained. To output a control signal. Then, in the next step 200, the process returns to step 110 after waiting for the elapse of the control cycle time τ.

Next, the determination of the inside / outside air suction mode in step 170 will be described in detail with reference to FIG. Also, FIG.
9 is a longitudinal sectional view of the inside / outside air switching device 11 of the present embodiment, and shows the state of each mode described later. First, step 170a
Tentatively determines the inside / outside air mode for control using a map stored in the ROM in advance. That is, when the target outlet temperature (TAO) into the vehicle compartment is equal to or lower than the predetermined value X which is a very low temperature range, the inside air mode is set, and when TAO> X, the outside air mode is set.

Then, in the next step 170b, the detection value of the vehicle exterior odor sensor 45 is compared with a preset value to determine the intensity of the external air odor. As a result, if the odor of the outside air is so small that it does not matter, and if it is determined to be almost "none", the process proceeds to step 170e, and the outside air deodorizing mode (see FIG. 2) is performed as there is no need to deodorize with the outside air.

However, if it is determined in step 170b that the odor of outside air is "strong" which is more than anxious,
Proceeding to step 170d, it is basically assumed that the inside air is circulated without taking in the odorous outside air, and the detection value of the vehicle interior odor sensor 46 is compared with a preset value to determine the odor intensity of the inside air. I do.

As a result, if the smell of the inside air is so small that it does not matter, and if it is determined that the smell is almost “none”, the process proceeds to step 170h, and no inside air deodorization mode is required (see FIG. 7). I do. When it is determined that the smell of the inside air is a little bothersome and “weak”, the process proceeds to step 170i, and the inside air semi-deodorization mode (see FIG. 8) in which the inside air is also deodorized is performed. On the other hand, if it is determined that the smell of shyness is “strong” or more, a step 170j
To select the inside air total deodorization mode (see FIG. 9) in which deodorization is completely performed with the inside air.

If it is determined in step 170b that the odor of the outside air is "weak" to the extent that the odor of the outside air is slightly anxious, the process proceeds to step 170c, and the detection value of the odor sensor 46 in the vehicle interior is set in advance as described above. Then, the odor intensity of the inside air is also determined by comparing with the set value thus set, and it is determined whether to use the inside air or the outside air.

More specifically, if the result of step 170c is so small that the odor of the inside air is not bothersome, and if it is generally determined to be "none", the process proceeds to step 170f. Mode (see FIG. 7). However, if the result of step 170c is determined to be “weak” that is a little anxious about the shy odor or “strong” that is more than the anxious odor, the process proceeds to step 170g.
An outside air semi-deodorization mode (see FIG. 6) in which the odor is slightly absorbed and the deodorization is performed is selected.

The operation of each mode of steps 170e to 170j will be described with reference to FIGS. 2 and 6 to 9. The rotary door 14 in the inside / outside air switching device 11 is controlled by a servomotor 47, and the filter holding member 15 is controlled by a servomotor 48. Is rotated to the position shown in each figure.

In other words, the rotary door 14 is rotated to the right in the drawing in the outside air mode, and to the left in the drawing in the inside air mode, so that one of the inlets 18 and 19 is closed by the circumferential wall 14a and the other is closed. Fully open. Here, the circumferential wall 14a
By pressing the sealing material 26 on the outer peripheral surface and the protruding rib 27 on the arc-shaped circumferential wall 17 side of the inside / outside air switching box 13 tightly, the inlets 18 and 19 are closed in an airtight manner, thereby ensuring that inside air or outside air is mixed. To prevent.

On the other hand, when the filter holding member 15 is in the full deodorizing mode, the filter holding member 15 turns to the opposite side to the rotary door 14 and is located on the inner peripheral side of the fully opened inlet, so that air from the inlet is held by the filter. After passing through the deodorizing filter 28 provided on the member 15, the adsorbent carried on the deodorizing filter 28 adsorbs odor components in the air. In the deodorization-free mode, the peripheral wall 1 rotates by rotating to the same side as the rotary door 14.
By being located on the inner peripheral side of 4a, deodorization is not performed and air is prevented from passing through the deodorizing filter 28.

In the case of the semi-deodorizing mode, both inlets 18 are provided.
19, a part of the air from the inlet passes through the deodorizing filter 28, and the odor component is adsorbed.
However, the rotational position of the filter holding member 15 may be changed from a position from total deodorization to no deodorization according to the odor intensity detected by the odor sensors 45 and 46.

The air that has passed through the rotation range of the deodorizing filter 28 flows to the outlet side of the inside / outside air switching box 13, passes through the dust filter 31, enters the air inlet casing 36 of the blower 12 into the air blowing casing 35, The air is blown by the fan 37. This blast air flows from the air outlet of the blast casing 35 into the air conditioning unit 40, where the evaporator 4
0a, after passing through the heater core 40b and being temperature-controlled, the air is blown out from the air outlet into the vehicle interior to air-condition the vehicle interior.

By the way, in the full deodorizing mode, the filter holding member 15 equipped with the deodorizing filter 28 is operated to a rotation position different from that of the rotary door 14, and the deodorizing filter 28 faces the front position of the outside air inlet 18. In addition, the front area of the deodorizing filter 28 with respect to the flow of air becomes large, and air flows uniformly over the entire area of the deodorizing filter 28. Therefore, since the malodor component is relatively uniformly adsorbed on the entire area of the deodorizing filter 28, the deodorizing filter 28
, And the efficiency of deodorization can be improved.

Further, since the rotary door 14 is formed of a hard plate made of resin or the like, the suction noise of the outside air flow is reflected on the door plate and may leak into the vehicle interior. Since it is composed of an adsorbent and a porous filter base material that carries the adsorbent, it has much better sound absorption characteristics than the rotary door 14. Therefore, since the deodorizing filter 28 faces the front positions of the inlets 18 and 19, the suction noise of the air flow can be favorably absorbed and reduced by the deodorizing filter 28.

(Second Embodiment) FIG. 10 is a longitudinal sectional view of the inside / outside air switching device 11 according to a second embodiment, and shows a state in a half-deodorization mode of outside air. The first embodiment is different from the first embodiment in that the deodorizing filter 28
Only the shape and the support structure of the filter holding member 15 are different.

As shown in FIG. 10, when viewed from the side, substantially Y
In the filter holding member 15 having a U-shape, a frame portion 15e that supports a part of the side surface and the lower surface of the deodorizing filter 28 on each of the upper two sides, and a ventilation window 15 surrounded by the frame portion 15e.
f is formed. The deodorizing filter 28 is a substantially arc-shaped filter having a central portion protruding in the direction of the rotation center 16, contrary to the arc shape along the circumferential wall 14 a of the rotary door 14 of the prior application device. By being fitted into and supported by the frame portion 15e, the filter holding member 15 has a substantially U-shape and is detachably built therein.

Thus, even in a semi-deodorizing state in which the deodorizing filter 28 is exposed to about half of the inlet, a portion of the air introduced from the opened inlet is first removed by the U-shaped deodorizing filter 28. Since the air enters the inner space and passes through the entire surface of the outer deodorizing filter 28 uniformly from the inner space, there is no bias in the amount of ventilation when passing through the deodorizing filter 28, and the deodorizing performance of the entire deodorizing filter 28 is utilized. Deodorizing performance is improved. Deodorizing filter 2
Since the air uniformly passes through the entire surface of No. 8, the deodorizing performance is maintained for a long time.

Further, since the filter area is increased as compared with the arc-shaped filter along the circumferential wall 14a of the rotary door 14 of the prior application, the deodorizing performance and the service life are improved, and since the filter passes through a wide area, the ventilation resistance is reduced. Reduce.

(Third Embodiment) FIG. 11 is a longitudinal sectional view of an inside / outside air switching device 11 according to a third embodiment, and shows a state of a half-deodorization mode of outside air. The first embodiment is different from the first embodiment in that the deodorizing filter 28
Only the shape and the support structure of the filter holding member 15 are different.

As shown in FIG. 11, the deodorizing filter 2 is provided on the upper side of the filter holding member 15 which is substantially inverted triangle when viewed from the side.
A frame 15e for supporting a part of the side surface and the lower surface of 8 and a ventilation window 15f surrounded by the frame 15e are formed. The deodorizing filter 28 is a single flat filter. Then, by being fitted into and supported by the frame portion 15e, it is detachably incorporated inside the filter holding member 15.

As a result, even in a semi-deodorized state in which the deodorizing filter 28 is exposed about half to the inlet, a part of the air introduced from the opened inlet is first removed by the arc-shaped circumferential wall 1.
4a and the space formed between the flat deodorizing filter 28, and uniformly passes through the entire surface of the deodorizing filter 28 therefrom. The deodorizing performance of the entire filter 28 is utilized to improve the deodorizing performance. Further, since the air uniformly passes through the entire surface of the deodorizing filter 28, the deodorizing performance is maintained for a long time.

Further, since the deodorizing filter 28 of the prior application is an arc filter along the circumferential wall 14a of the rotary door 14, it can be constituted by a flat filter.
It becomes easy to manufacture the filter alone. In addition, the filter alone can be handled compactly, and can be easily attached to and detached from the device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a blower unit according to a first embodiment of the present invention, showing a sectional structure in a vehicle left-right direction.

FIG. 2 is a longitudinal sectional view of the blower unit of FIG. 1, showing a sectional structure in a vehicle front-rear direction, and showing a state in which there is no outside air deodorization mode.

FIG. 3 is a block diagram of electric control.

FIG. 4 is a flowchart of electric control.

FIG. 5 is a detailed flowchart of a main part of the electric control of FIG. 4;

FIG. 6 is a longitudinal sectional view of the inside / outside air switching device of the first embodiment,
It shows the state of the outside air semi-deodorant mode.

FIG. 7 is a longitudinal sectional view of the inside / outside air switching device of the first embodiment,
This shows the state of no inside air deodorization mode.

FIG. 8 is a longitudinal sectional view of the inside / outside air switching device of the first embodiment,
This shows the state of the inside air semi-deodorant mode.

FIG. 9 is a longitudinal sectional view of the inside / outside air switching device of the first embodiment,
This shows the state of the inside air total deodorization mode.

FIG. 10 is a vertical cross-sectional view of the inside / outside air switching device according to the second embodiment, showing a state of an outside air semi-deodorizing mode.

FIG. 11 is a vertical cross-sectional view of the inside / outside air switching device according to the third embodiment, and shows a state of an outside air semi-deodorization mode.

[Explanation of symbols]

 13 Inside / outside air switching box 14 Rotary door (inside / outside air switching door) 14a Circumferential wall (wall) 15 Filter holding member 16 Center of rotation 18 Outside air inlet 19 Inside air inlet 28 Deodorizing filter

Claims (2)

[Claims] An inside / outside air switching box (13) having an outside air introduction port (18) for introducing outside air and an inside air introduction port (19) for introducing inside air, and displaceable into the inside / outside air switching box (13). An inside / outside air switching door (14) which is disposed and has a wall portion (14a); and an inside / outside air switching box (13).
A filter holding member (15) that can be displaced independently of the inside / outside air switching door (14) is provided at a position downstream of the wall (14a) in the air, and the outside air is introduced by the displacement of the wall (14a). Mouth (1
8) and the inside air inlet (19) are opened and closed, and a deodorizing filter (28) for adsorbing malodorous components in the air is disposed on the filter holding member (15) to be integrated with the filter holding member (15). When the one of the outside air introduction port (18) and the inside air introduction port (19) is closed by the wall (14a) and the other introduction port is opened, the opened introduction port is opened. When it is necessary to deodorize air from the mouth, the filter holding member (1)
5) is displaced to the open inlet side to allow air from the open inlet to pass through the deodorizing filter (28) and deodorize air from the open inlet. When there is no filter holding member (1)
5) The air conditioner for a vehicle in which the air is displaced downstream of the wall portion (14a), wherein the air from the opened inlet is passed through the deodorizing filter (28). An air conditioner for a vehicle, wherein an air upstream side of the deodorizing filter (28) is a flat surface or a concave surface with respect to an air flow from an inlet. 2. The inside / outside air switching door has a rotation center (1).
6) a rotary door (14) rotatably arranged around a center, wherein the wall portion is an arc-shaped circumferential wall (14a) centered on the rotation center (16); The opening of the outside air introduction port (18) and the inside air introduction port (19) are opened and closed by the rotation of ()), and the filter holding member (15) is rotatable about the rotation center (16). The deodorizing filter (28) is rotatable integrally with the filter holding member (15), and the center of the deodorizing filter (28) is depressed in the direction of the rotation center (16). The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is arranged in a V shape.