JP3978845B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner that combines an inside / outside air switching function and a deodorizing filter function.
[0002]
[Prior art]
Conventionally, when boarding a vehicle, in order to prevent the diesel exhaust gas odor from the front vehicle traveling in front of the vehicle from flowing into the vehicle interior, the inside / outside air switching device of the vehicle air conditioner is set to the all inside air mode, Alternatively, it is necessary to allow the entire air volume of the outside air to pass through the deodorizing filter in the all outside air mode and to adsorb malodorous components in the outside air with this deodorizing filter.
[0003]
[Problems to be solved by the invention]
However, if the whole room air mode is continued for a long time, the vehicle interior cannot be ventilated, so the CO in the vehicle interior cannot be ventilated. ₂ The concentration increases and adversely affects the occupant's body physiology. In addition, when the entire outside air mode is passed through the deodorizing filter in the all outside air mode, the deodorizing filter has a high pressure loss structure for supporting the adsorbent, so the air volume of the air conditioner is greatly reduced. However, there is a problem that the air-conditioning capacity is lowered and the ventilation noise is increased due to the high pressure loss ventilation system.
[0004]
In Japanese Utility Model Laid-Open No. 2-17413, a vehicle air conditioner is proposed in which the introduction of inside and outside air is switched at the arc-shaped circumferential wall of the rotary door, and a deodorizing filter is built in the rotary door. In this conventional technology, the air volume of the air conditioner is greatly reduced due to the high pressure loss of the deodorizing filter because the entire air volume of the outside air and the inside air always passes through the deodorizing filter in both the all outside air mode and the all inside air mode. There is a problem that it will.
[0005]
The present invention has been made in view of the above points, and in a vehicle air conditioner, ensuring a vehicle interior ventilation function and an outside air deodorizing function by introducing outside air, and avoiding a decrease in the air volume of the air conditioner due to a high pressure loss of the deodorizing filter. The purpose is to achieve both.
In addition, the present invention provides a deodorizing mode for all outside air or all inside air when it is desired to preferentially exert the deodorizing function of the outside air or inside air by the deodorizing filter over the reduction in the air volume of the air conditioner due to the high pressure loss of the deodorizing filter. Another purpose is to be able to set.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the invention according to claim 1, on the air downstream side of the wall portion (14a) of the inside / outside air switching door (14) that opens and closes the outside air introduction port (18) and the inside air introduction port (19), A deodorizing filter (25) that adsorbs malodorous components in the air is arranged through a gap (24) at a predetermined interval from the wall (14a), and the deodorizing filter (25) is integrated with the inside / outside air switching door (14). To be displaced
When the inside / outside air switching door (14) is displaced to an intermediate opening position where the wall (14a) opens both the outside air introduction port (18) and the inside air introduction port (19) at an intermediate opening degree,
The flow of inside air that flows directly from the inside air introduction port (19) to the outlet side of the inside / outside air switching box (13), and the inside and outside air after passing through the deodorizing filter (25) from the outside air introduction port (18) through the gap (24) It is characterized by forming a flow of outside air that flows to the outlet side of the switching box (13).
[0007]
According to this, outside air can be mixed into the inside air and introduced into the vehicle interior, and vehicle interior ventilation can be achieved by introducing the outside air. Moreover, since the outside air from the outside air inlet (18) can be deodorized by passing through the deodorizing filter (25), it is possible to prevent the diesel exhaust gas odor from the front vehicle from flowing into the vehicle interior.
Further, the amount of deodorized air passing through the deodorizing filter (25) is a part of the total amount of air introduced, and is a small amount of air, and most of the amount of air introduced passes through the internal air inlet (19) side flow path with small pressure loss. Even if the deodorizing filter (25) has a high pressure loss, it is possible to suppress a decrease in the total introduced air volume.
[0008]
In the invention described in claim 2, the inside / outside air switching box (13) is provided with the auxiliary inside air introduction port (20) for introducing the inside air independently from the inside air introduction port (19). 20) An auxiliary inside air door (21) for opening and closing is provided, and when the inside / outside air switching door (14) is displaced to the intermediate opening position, the auxiliary inside air door (21) is opened to the auxiliary inside air introduction port (20). And the flow of the outside air is guided by the auxiliary inside air door (21) so that the outside air flows into the gap (24) from the outside air introduction port (18).
[0009]
According to this, the air intake capacity can be increased by opening the auxiliary internal air introduction port (20) and the air conditioning capacity can be increased, and the deodorizing filter (25) is passed by the air guide action of the auxiliary internal air door (21). The amount of outside air can be secured well, and the function of vehicle interior ventilation can be achieved sufficiently.
Further, in the invention according to claim 3, the inside / outside air switching door (14) is provided in a portion of the inside / outside air switching box (13) on the air downstream side of the wall (14a) of the inside / outside air switching door (14). And a filter holding member (15) that can be displaced independently from each other. A deodorizing filter (28) that adsorbs malodorous components in the air is disposed on the filter holding member (15), and the deodorizing filter (28) So as to be displaced integrally with the filter holding member (15),
When either one of the outside air introduction port (18) and the inside air introduction port (19) is closed by the wall (14a) of the inside / outside air switching door (14) and the other introduction port is opened, this open introduction is performed. When it is necessary to deodorize the air from the mouth, the filter holding member (15) is displaced toward the opened inlet, and the air from the opened inlet is deodorized by the filter holding member (15). (28)
And when it is not necessary to deodorize the air from the open inlet, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14). It is characterized by.
[0010]
According to this, in the all outside air mode or all the inside air mode, the filter holding member (15) is displaced toward the opened outside air introduction port (18) or inside air introduction port (19) only when deodorization is necessary. The entire amount of outside air or inside air can be deodorized by the deodorizing filter (28) of the filter holding member (15).
Moreover, the filter holding member (15) equipped with the deodorizing filter (28) is displaced to a position different from the inside / outside air switching door (14), and the deodorizing filter (28) is moved to the inside / outside air inlets (18, 19). It becomes possible to face the front position. Therefore, malodorous components can be adsorbed relatively uniformly over the entire area of the second deodorizing filter (28), and the life of the deodorizing filter (28) can be extended and the deodorizing efficiency can be improved.
[0011]
At the same time, since the deodorizing filter (28) is composed of an adsorbent and a filter base material carrying the adsorbent, the sound absorption characteristics are far superior to the inside / outside air switching door (14). Therefore, when the deodorizing filter (28) faces the front position of the inlets (18, 19) for the inside and outside air, the suction sound of the inside and outside air can be satisfactorily absorbed and reduced by the deodorizing filter (28).
[0012]
On the other hand, when there is no need for deodorization, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14), so that the deodorizing filter ( 28) can be bypassed to allow outside air or inside air to flow, and a reduction in air volume due to high pressure loss of the deodorizing filter (28) can be prevented.
The inside / outside air switching door can be constituted by a rotary door (14) arranged so as to be rotatable around a rotation center (16) as described in claim 4, and this rotary door (14) has an outside air inlet ( 18) and the wall portion that opens and closes the inside air inlet (19) is constituted by an arcuate circumferential wall (14a) centered on the rotation center (16).
[0013]
The deodorizing filter (25) is disposed on the inner peripheral side of the circumferential wall (14a) via a gap (24) with a predetermined interval, and rotates integrally with the rotary door (14).
Thus, by setting it as the structure which incorporates a deodorizing filter (25) in a rotary door (14), an inside / outside air switching apparatus can be comprised with the physique of a small small space.
Further, in the invention according to claim 5, when the inside / outside air switching door (14) is displaced to the intermediate opening position, the ratio of outside air introduction to the total amount of air introduced from the outside air introduction port (18) and the inside air introduction port (19). Is 30% or less.
[0014]
In this way, by limiting the introduction ratio of outside air to 30% or less, it is possible to reduce the air-conditioning heat load while increasing the ratio of the inside air circulation volume while ensuring the necessary ventilation volume and during heating. It is possible to improve the capacity by increasing the temperature of the blown air, and to reduce the compressor driving power during cooling.
Furthermore, since the amount of outside air passing through the deodorizing filter (25) is small, it is possible to reduce the inflow speed of the outside air to the deodorizing filter (25), and to reduce the pressure loss at the deodorizing filter (25). Since the passing air volume of the deodorizing filter (25) is small, the life of the deodorizing filter (25) can be extended, which is advantageous.
[0015]
Next, in the invention according to claim 6, the outside air introduction port (18) and the inside air introduction port are formed by the wall portion (14a) of the inside / outside air switching door (14) displaceably disposed in the inside / outside air switching box (13). In the vehicle air conditioner configured to open and close (19),
A filter holding member that can be displaced independently of the inside / outside air switching door (14) in a portion of the inside / outside air switching box (13) on the downstream side of the wall (14a) of the inside / outside air switching door (14). (15)
this A deodorizing filter (28) that adsorbs malodorous components in the air is disposed on the filter holding member (15), and the deodorizing filter (28) is displaced integrally with the filter holding member (15),
When either one of the outside air introduction port (18) and the inside air introduction port (19) is closed by the wall (14a) of the inside / outside air switching door (14) and the other introduction port is opened, this open introduction is performed. When it is necessary to deodorize the air from the mouth, the filter holding member (15) is displaced to the opened inlet side, and the air from the opened inlet port passes through the deodorized filter (28),
In addition, when it is not necessary to deodorize the air from the opened inlet, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14). It is a feature.
[0016]
According to the sixth aspect of the invention, the same effect as that of the third aspect of the invention described above can be achieved. Therefore, in the all-out air mode or all-in-air mode, only when there is a need for deodorization, the total amount of outside air or inside air Can be deodorized by the deodorizing filter (28) of the filter holding member (15).
In addition, since the deodorizing filter (28) can be faced to the front position of the inside / outside air inlets (18, 19), the life of the deodorizing filter (28) can be extended and the deodorizing efficiency can be improved. . At the same time, due to the sound absorption characteristics of the deodorizing filter (28), the intake sound of the inside and outside air can be satisfactorily absorbed and reduced by the deodorizing filter (28).
[0017]
On the other hand, when there is no need for deodorization, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14), so that the air volume due to the high pressure loss of the deodorization filter (28) Decrease can be prevented.
Claims 6 In the described invention , A deodorizing filter (25) that adsorbs deodorizing components in the air is disposed on the downstream side of the wall (14a) of the inside / outside air switching door (14) via a gap (24) at a predetermined interval from the wall (14a). The deodorizing filter (25) is displaced integrally with the inside / outside air switching door (14),
When the inside / outside air switching door (14) is displaced to an intermediate opening position where the wall (14a) opens both the outside air introduction port (18) and the inside air introduction port (19) at an intermediate opening, the inside air introduction port (19 ) From the outside air inlet (18) through the gap (24), the deodorizing filter (25) of the inside / outside air switching door (14), and the filter. Deodorizing filter for holding member (15) ( 28 ) And the flow of outside air flowing to the outlet side of the inside / outside air switching box (13).
[0018]
Therefore, the claims 6 According to the described invention, the claims 3 The effects of the invention described above and the invention described in claim 1 can be combined.
Claims 7 In the described invention, when it is determined that the vehicle exterior odor sensor (45) for detecting the odor component outside the vehicle compartment is provided and it is necessary to deodorize the outside air based on the detection signal of the vehicle exterior odor sensor (45). Is characterized in that the inside / outside air switching door (14) is displaced to the intermediate opening position.
[0019]
According to this, it is possible to automatically set an intake mode in which a part of the outside air is mixed into the inside air and deodorize the outside air based on the detection signal from the outside odor sensor (45).
Claims 8 The described invention includes a vehicle exterior odor sensor (45) for detecting an odor component outside the vehicle compartment and an outside air temperature sensor (44) for detecting the outside air temperature,
It is determined that it is necessary to deodorize the outside air based on the detection signal of the outside odor sensor (45), and the outside air temperature is below a predetermined temperature corresponding to the cold time based on the detection signal of the outside air temperature sensor (44). When it is determined that there is, the inside / outside air switching door (14) is displaced to the all outside air mode position where the outside air introduction port (18) is fully opened and the inside air introduction port (19) is fully closed, and the filter holding member ( 15) is displaced to the outside air introduction port (18) side, and the outside air from the outside air introduction port (18) is passed through the deodorizing filter (28) of the filter holding member (15).
[0020]
By the way, in a vehicle air conditioner, the compressor of an air-conditioning refrigeration cycle is usually stopped at a low outside air temperature such as in cold weather, and the dehumidifying action by the refrigerant evaporator cannot be obtained. 8 According to the described invention, when the outside air temperature is low, the all outside air mode can be automatically set based on the detection signal of the outside air temperature sensor (44), so that it is possible to prevent fogging of the window glass due to mixing of inside air (high humidity). Moreover, when it is determined that it is necessary to deodorize the outside air based on the detection signal from the vehicle exterior odor sensor (45), the deodorizing filter (28) of the filter holding member (15) is moved to the outside air inlet (18) side. Displacement of the outside air can be performed.
[0021]
Claims 9 The described invention includes a vehicle interior odor sensor (46) for detecting a odor component in the vehicle interior,
It is necessary to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46) when the outside air introduction port (18) is fully closed and the inside air introduction port (19) is fully opened. When it is determined that there is, the inside / outside air switching door (14) is displaced to the all inside air mode position, and the filter holding member (15) is displaced to the inside air introduction port (19) side, and the inside air introduction port (19 ) Is allowed to pass through the deodorizing filter (28) of the filter holding member (15).
[0022]
According to this, the mode which deodorizes internal air with the deodorizing filter (28) of a filter holding member (15) at the time of all internal air mode can be automatically set based on the detection signal of a vehicle interior odor sensor (46).
Claims 10 In the described invention, the support shaft (14e) is formed at the end of the wall portion (14a) of the inside / outside air switching door (14) in the direction orthogonal to the direction of the displacement, and the inside / outside air switching box (13). A groove portion (23) that slidably fits and supports the support shaft (14e) is formed on the wall surface of the seal, and a seal that prevents air from flowing through the fitting portion between the support shaft (14e) and the groove portion (23). It is characterized by comprising a member (52).
[0023]
According to this, air circulation (leakage) through the fitting portion can be reliably prevented by the seal member (52). Thereby, in some inside air mixed inside air modes, a deodorizing filter (28) can be bypassed and problems, such as air passing through the above-mentioned fitting part, can be eliminated.
Claims 10 The sealing member (52) of the present invention is specifically claimed. 11 As described in the above, it is composed of two side plates (52a) made of a low friction material and an elastic body (52b) disposed between the two side plates (52a).
If the side plate (52a) is pressed against the end of the wall (14a) and the end of the groove (23) of the inside / outside air switching door (14) by the elastic repulsive force of the elastic body (52b), The sealing action for preventing air flow can be exhibited well.
[0024]
Furthermore, the above claims 6 to 11 The inside / outside air switching door according to the invention described in claim 12 As described, it can be configured by a rotatable rotary door (14), and the filter holding member (15) can also be configured to be rotatable.
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIGS. 1-10 shows 1st Embodiment and has shown the air blower unit 10 in the vehicle air conditioner. This blower unit 10 is mounted on the front side of the passenger seat below the instrument panel installed in the front part of the vehicle interior, and an inside / outside air switching device 11 is arranged on the upper side in the vehicle mounted state, and this inside / outside air switching is performed. A blower 12 is disposed on the lower side of the device 11. And these both 11 and 12 are connected together and are comprised as one unit.
[0026]
The inside / outside air switching device 11 has a resin inside / outside air switching box 13, and an arcuate circumferential wall surface 17 (see FIG. 2) is formed on the upper portion thereof. The rotary door 14 and the filter holding member 15 are formed in a circular arc shape with the rotation center 16 as the center. In addition, 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 introduction port 19 is opened.
[0027]
Further, in the inside / outside air switching box 13, an auxiliary inside air introduction port 20 having a sufficiently small opening area as compared with the inside air introduction port 19 is opened in the side wall on the vehicle front side. The auxiliary internal air introduction port 20 is opened and closed by an auxiliary internal air door 21. The auxiliary inside air door 21 is a flat door that can be rotated about a rotating shaft 21a.
Next, the rotary door 14 and the filter holding member 15 which are the main parts of the present invention will be described in detail. Both the doors 14 and 15 are made of an integrally molded product of resin, and the rotary door 14 constitutes an inside / outside air switching door. An arcuate circumferential wall 14 a centering on the rotation center 16 is provided. The circumferential wall 14 a is disposed on the inner circumferential side of the arc-shaped circumferential wall 17 and is formed to have an area larger than the opening areas of the outside air introduction port 18 and the inside air introduction port 19. Therefore, both the introduction ports 18 and 19 can be opened and closed by the rotation of the circumferential wall 14a, and in this example, a wall portion for opening and closing both the introduction ports 18 and 19 is constituted by the circumferential wall 14a.
[0028]
The rotary door 14 has a side plate 14b on one end side in the axial direction (left end portion side in FIG. 1). As shown in FIG. 2, the side plate 14b has a fan shape that hangs down from the circumferential wall 14a to the inner peripheral side, and a columnar rotating shaft 14c having the rotation center 16 is located at the center of the fan. It is integrally molded so as to protrude outward in the direction. The rotating shaft 14c is inserted into a bearing hole 22 provided in the side wall on the left side of the vehicle of the inside / outside air switching box 13 by loose fitting and is rotatably supported.
[0029]
Further, an arc-shaped side plate 14d is formed on the other end side in the axial direction of the rotary door 14 (right end portion side in FIG. 1). A cylindrical support shaft 14e that protrudes outward in the axial direction is also integrally formed with 14d. The support shaft 14e is inserted into an arc-shaped bearing groove 23 provided on the side wall on the right side of the vehicle of the inside / outside air switching box 13 by loose fitting, 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.
[0030]
A first deodorizing filter 25 is installed on the inner peripheral side of the circumferential wall 14a of the rotary door 14 with a gap 24 having a predetermined interval L therebetween. The first deodorizing filter 25 has an arc shape along the circumferential wall 14a as shown in FIG. 2, and is built in the inner circumferential side of the circumferential wall 14a of the rotary door 14 with the following support structure.
That is, as shown in FIG. 2, support plates 14f and 14g are formed at both ends in the circumferential direction of the circumferential wall 14a of the rotary door 14 so as to hang down to the inner circumferential side of the circumferential wall 14a. The support plates 14f and 14g have a rectangular shape extending in the axial direction of the rotary door 14, and the side plates 14b and 14d at both ends in the axial direction are integrally connected by the support plates 14f and 14g. In addition, projecting pieces 14h and 14i that support the lower surface portion of the first deodorizing filter 25 are formed on the support plates 14f and 14g, respectively. In addition, protruding pieces 14j and 14k that support the lower surface portion of the first deodorizing filter 25 are also formed on the side plates 14b and 14d at both axial ends of the rotary door 14.
[0031]
The first deodorizing filter 25 is detachably incorporated on the inner peripheral side of the circumferential wall 14a of the rotary door 14 by being placed and supported on the above-described protruding pieces 14h to 14k.
Further, of the support plates 14f and 14g at both ends in the circumferential direction of the circumferential wall 14a of the rotary door 14, the support plate 14f on the left side of FIG. 2 receives the outside air from the outside air inlet 18 into the gap on the inner circumferential side of the circumferential wall 14a. The opening 14m for introducing into 24 is opened.
[0032]
A sealing material 26 made of an elastic material such as rubber is fixed to the outer peripheral surface of the circumferential wall 14a by adhesion or the like. The sealing material 26 has a rectangular (rectangular) frame shape corresponding to the opening edges of the outside air introduction port 18 and the inside air introduction port 19. On the other hand, the arc-shaped circumferential wall surface 17 of the inside / outside air switching box 13 is integrally formed with a projecting rib 27 having a triangular cross section projecting inward along the opening edge of the outside air introduction port 18 and the inside air introduction port 19. Has been.
[0033]
Then, the protruding rib 27 and the sealing material 26 are pressure-bonded to reliably close the outside air introduction port 18 or the inside air introduction port 19 with the arc-shaped circumferential wall surface 17 so that the inside air is mixed into the outside air, Prevents problems such as outside air mixing inside.
Next, the filter holding member 15 is configured to be housed on the inner peripheral side of the first deodorizing filter 25 located on the inner peripheral side of the circumferential wall surface 17 of the rotary door 14, and the second deodorizing filter 28 is built-in. However, since the filter holding member 15 does not perform the switching action of the inside and outside air, it does not have a circumferential wall corresponding to the circumferential wall 14a.
[0034]
A side plate 15 a located on the inner peripheral side of the first deodorizing filter 25 is formed at one end of the filter holding member 15 in the axial direction. The side plate 15a has an arc shape that hangs by a small dimension from the inner peripheral side of the first deodorizing filter 25. The arc-shaped side plate 15a has a cylindrical support shaft that protrudes outward in the axial direction. 15b is integrally formed. This support shaft 15b is inserted into an arc-shaped bearing groove 29 formed in the fan-shaped side plate 14b of the rotary door 14 by loose fitting and is slidably supported. 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.
[0035]
A side plate 15 c is formed at the other axial end of the filter holding member 15. As shown in FIG. 2, the side plate 15 c has a sector shape and hangs radially inward from a position on the inner peripheral side of the support shaft 14 e of the rotary door 14. A cylindrical rotary shaft 15d having the rotation center 16 at the position of the fan is integrally formed so as to protrude outward in the axial direction. The rotary shaft 15d is inserted loosely into a bearing hole 30 provided in the side wall on the right side of the vehicle of the inside / outside air switching box 13 and is rotatably supported.
[0036]
Next, the support structure of the second deodorizing filter 28 with respect to the filter holding member 15 will be described. The support plates 14f of the rotary door 14 are provided on the outer peripheral sides of both end portions in the circumferential direction of the side plates 15a, 15c of the filter holding member 15. Support plates 15e and 15f that hang down to the inner peripheral side of 14g are formed. The support plates 15e and 15f have a rectangular shape extending in the axial direction of the filter holding member 15. The side plates 15a and 15c at both ends in the axial direction are integrally connected by the support plates 15e and 15f.
[0037]
Further, projecting pieces 15g and 15h for supporting the lower surface portion of the second deodorizing filter 28 are formed on the support plates 15e and 15f, respectively. In addition, projecting pieces 15 i and 15 j that support the lower surface portion of the second deodorizing filter 28 are also formed on the side plates 15 a and 15 c at both axial ends of the filter holding member 15.
The 2nd deodorizing filter 28 is built in the inside of the filter holding member 15 so that attachment or detachment is possible by mounting and supporting on the above-mentioned protrusion pieces 15g-15j.
[0038]
The first and second deodorizing filters 25 and 28 are both made of the same material, and deodorize to adsorb malodorous components in the outside air (for example, diesel exhaust gas odorous components such as acetaldehyde). An agent (activated carbon or the like) is supported on a porous filter substrate such as urethane foam by an appropriate binder. As this binder, an acidic one 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 carrying the deodorant into a corrugated shape (wave shape). Moreover, it has the structure which hold | maintains the peripheral part of a corrugated porous filter base material with frames, such as resin.
[0039]
The first and second deodorizing filters 25 and 28 having such a configuration have a significantly larger ventilation resistance (pressure loss) than the dust removing filter 31 due to the loading of a deodorizing agent such as activated carbon. As shown in FIGS. 1 and 2, the dust removal filter 31 is located inside the inside / outside air switching box 13, near the rotary shafts 14 c and 15 d of the rotary door 14 and the filter holding member 15, that is, at the outlet side of the inside / outside air switching box 13. Placed in.
[0040]
On the outlet side of the inside / outside air switching box 13, the filter support wall 32 positioned on the axially inner side of the fan-shaped side plate 14 b of the rotary door 14 and the filter support positioned on the axially inner side of the fan-shaped side plate 15 c of the filter holding member 15. The wall 33 is integrally formed. The dust filter 31 has a quadrangular shape that can be inserted between the filter support walls 32 and 33 and the two side walls in the vehicle front-rear direction of the inside / outside air switching box 13. Protruding pieces 32 a, 33 a, and 34 that support the lower surface portion of the dust filter 31 are formed on the two side walls in the vehicle longitudinal direction of the inside / outside air switching box 13.
[0041]
Therefore, by placing the dust removal filter 31 on these projecting pieces 32a, 33a, 34, the dust removal filter 31 is positioned in the vicinity of the rotary shafts 14c, 15d in the inside / outside air switching box 13 (in other words, inside / outside air switching). On the outlet side of the box 13, it is detachably incorporated in a position immediately before a blower inlet 36 described later). The dust removal filter 31 is for removing dust in the inside air or outside air introduced into the inside / outside air switching box 13. For example, filter media such as filter paper and porous urethane foam are folded into a corrugated shape (wave shape). By doing so, the filter area is increased, and the periphery of the corrugated filter medium is held by a frame made of resin or the like.
[0042]
Since the dust removing filter 31 can be composed 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 first and second deodorizing filters 25 and 28.
Next, the blower 12 portion will be described. The blower 12 is a centrifugal multiblade blower and has a well-known scroll-shaped resin blower casing 35, and an upper central portion of the blower casing 35. A bell mouth-shaped suction port 36 is opened. A centrifugal multiblade fan (sirocco fan) 37 for blowing the intake air from the suction port 36 is disposed in the blowing casing 35.
[0043]
Here, the fan 37 is arranged so that the rotation axis thereof is directed in the vertical direction of the vehicle. When the fan 37 passes through the fan 37, the direction of the air is changed by 90 ° and blown outward in the radial direction. In this example, the air outlet portion (not shown) of the blowing casing 35 is set to the right side of the vehicle in FIG. 1, and the blown air flows in the direction of arrow A in FIG.
[0044]
A motor 38 for rotationally driving the fan 37 is disposed so as to penetrate the bottom surface portion 35 a of the blowing casing 35, and the motor 38 is connected to the blowing casing 35 via an attachment flange 39 provided on the motor 38. It is fixed to the bottom part 35a.
The air inlet of the air conditioning unit 40 is connected to the air outlet of the blowing casing 35. As is well known, this air conditioning unit 40 includes a refrigerant evaporator (cooling heat exchanger) 40a, a hot water heater core (heating heat exchanger) 40b, a temperature adjusting air mix door (temperature adjusting means) 40c, and a bypass of the heater core 40b. A passage 40d, a blowing mode switching door mechanism (not shown), a face, a defroster, various air outlets (not shown), and the like are installed.
[0045]
FIG. 3 is an electric control block diagram in the first embodiment, and an air conditioning electronic control unit (ECU) 41 is composed of a microcomputer or the like, and various air conditioners installed in the blower unit 10 and the air conditioning unit 40. Is controlled according to a preset program. The ECU 41 is supplied with power from an in-vehicle battery (not shown) when an ignition switch (not shown) of an automobile engine is turned on.
[0046]
A sensor signal from a known sensor group 42 and an operation signal from an air conditioning operation panel 43 installed in the vehicle interior instrument panel are input to the ECU 41. Of the sensor group 42, sensors related to the electric control of the first embodiment will be described. An outside air temperature sensor 44 that detects the outside temperature (outside air temperature) of the passenger compartment, an odor component outside the passenger compartment (diesel exhaust gas odor outside the passenger compartment). The vehicle interior odor sensor 45 for detecting a odor component 45 for detecting a odor component in the vehicle interior (such as a tobacco odor component in the vehicle interior).
[0047]
The various air conditioners controlled by the ECU 41 will be described only for those related to the electric control of the first embodiment. The servo motor 47 for controlling the rotation amount of the rotary door 14 and the rotation amount of the filter holding member 15 are controlled. A servo motor 48 and a servo motor 49 for controlling the rotation amount of the auxiliary inside air door 21 are provided. The output shafts of these servomotors 47 to 49 are connected to the rotary shaft 14c of the rotary door 14, the rotary shaft 15d of the filter holding member 15, and the rotary shaft 21a of the auxiliary internal air door 21 through appropriate link mechanisms or the like. . That is, in this example, servo motors 47 to 49 as actuators are provided independently on the three rotating members 14, 15, and 21 provided in the inside / outside air switching device 11.
[0048]
Next, the operation of the first embodiment in the above configuration will be described. 4 and 5 are flowcharts showing the control by the ECU 41. When the ignition switch is turned on and power is supplied to the ECU 33, an air conditioning operation switch (not shown) of the air conditioning operation panel 43 is turned on. Then, the control routine of FIG. 4 is started, and initialization and initial setting are performed in step 100, and in step 110, the set temperature set by the temperature setting switch of the air conditioning operation panel 43 is input.
[0049]
In the next step 120, a signal obtained by A / D converting the value of the sensor group 42 is read. Then, in the next step 130, a target blowing temperature (TAO) into the vehicle compartment is calculated based on the following formula 1 stored in advance in the ROM.
[0050]
[Expression 1]
TAO = Kset * Tset-Kr * Tr-Kam * Tam-Ks * Ts + C
Tset is a temperature set by the temperature setting switch, Tr is a detected value of the inside air temperature sensor, Tam is a detected value of the outside air temperature sensor 44, and Ts is a detected value of the solar radiation sensor. Kset, Kr, Kam, and Ks are gains, and C is a correction constant.
[0051]
Next, in step 140, an applied voltage (blower voltage) of the blower motor 38 corresponding to the TAO is calculated from a map (not shown) stored in advance in the ROM. In the next step 150, the blowing mode corresponding to the TAO is determined from a map (not shown) stored in advance in the ROM. Here, in the determination of the blowing mode, the face mode, the bi-level mode, the foot mode, and the foot differential mode are determined from the lower TAO to the higher TAO.
[0052]
In the present embodiment, when a defroster switch (not shown) provided on the operation panel 43 is operated, the defroster mode is forcibly set.
In step 160, the target opening degree (SW) of the temperature control air mix door 40c in the air conditioning unit 40 is calculated based on the following formula 2 stored in the ROM in advance.
[0053]
[Expression 2]
SW = ((TAO−Te) / (Tw−Te)) × 100 (%)
Te is a detection value of the post-evaporator temperature sensor that detects the temperature of the blown air from the evaporator 40a, and Tw is a detection value of the water temperature sensor that detects the temperature of the hot water circulating through the hot water heater core 40b. When calculated as SW ≦ 0 (%), the air mix door 40c is controlled to a position where all of the cold air from the refrigerant evaporator 40a passes through the bypass passage 40d. When calculated as SW ≧ 100 (%), the air mix door 40c is controlled to a position where all the cold air passes through the heater core 40b. When calculated as 0 (%) <SW <100 (%), the air mix door 40c is controlled at a position where the cold air passes through both the heater core 8 and the bypass passage 9.
[0054]
Then, when proceeding to the next step 170, the inside / outside air intake mode by the inside / outside air switching device 11 is determined. The determination of the inside / outside air intake mode will be described later with reference to FIG. In the next step 180, ON / OFF of the compressor (not shown) of the refrigeration cycle including the evaporator 40a is determined based on the detected value Tam of the outside air temperature sensor 44 and the detected value Te of the post-evaporator temperature sensor. Is done.
[0055]
Next, the process proceeds to step 190, and control signals are sent to the air conditioners such as the servo motors 47 to 48 and the blower motor 38 so that the modes calculated or determined in the steps 140 to 180 are obtained. Is output.
Then, in the next step 200, the control cycle time τ is awaited and the process returns to step 110.
[0056]
Next, the determination of the inside / outside air suction mode in step 170 will be described in detail with reference to FIG. First, in step 170a, a control internal / external air mode is temporarily determined based on a map stored in advance in the ROM. That is, when the target outlet temperature (TAO) into the passenger compartment is equal to or lower than a 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.
[0057]
In step 170b, it is determined whether the inside / outside air mode in step 170a is the outside air mode. When it is determined that the outdoor air mode is selected, it is determined whether deodorization is necessary in the next step 170c. In other words, the detection value of the vehicle exterior odor sensor 45 is compared with a preset value, and it is determined that deodorization is necessary when the sensor detection value exceeds the set value, such as when traveling in a traffic jam in an urban area. The process proceeds to step 170d.
[0058]
In this step 170d, it is determined whether or not the outside air temperature detected by the outside air temperature sensor 44 has dropped below a set value (−5 ° C. in this example). Here, the outside air temperature set value in step 170d is set to a temperature at which the compressor (not shown) that circulates the refrigerant to the refrigerant evaporator 40a is forcibly stopped. It is a determination of whether the temperature is in the compressor stop region.
[0059]
When the outside air temperature falls below the set value, the cooling and dehumidifying action of the refrigerant evaporator 40a remains stopped by stopping the compressor. ,It is a danger.
Therefore, when the outside air temperature is not more than the set value in step 170d, the next outside air mode is always set in the next step 170e to prevent the vehicle window glass from being fogged. In step 170e, in addition to the all outside air mode, the all outside air + deodorizing mode for deodorizing outside air is performed.
[0060]
The mode of step 170e will be described with reference to FIG. 6. The rotary door 14 in the inside / outside air switching device 11 is driven by the servo motor 47, the filter holding member 15 is driven by the servo motor 48, and the auxiliary inside air door 21 is driven by the servo motor 49. It is rotated to the position shown in FIG.
That is, the rotary door 14 is rotated to the right in FIG. 6 and is in a position where the internal air inlet 19 is closed by the circumferential wall 14a and the external air inlet 18 is fully opened. Here, by sealing the sealing material 26 on the outer peripheral surface of the circumferential wall 14a and the protruding rib 27 on the arcuate circumferential wall surface 17 side of the inside / outside air switching box 13, the inside air introduction port 19 is airtightly closed, and the outside air To prevent the inside air from entering.
[0061]
On the other hand, the filter holding member 15 is rotated to the left in FIG. 6 and is located on the inner peripheral side of the outside air inlet 18. The auxiliary inside air door 21 is rotated to a position where the auxiliary inside air introduction port 20 is fully closed. Since the filter holding member 15 is positioned on the inner peripheral side of the outside air introduction port 18, most of the outside air B from the outside air introduction port 18 is B. ₁ Passes through the second deodorizing filter 28 mounted on the filter holding member 15, and the adsorbent carried on the second deodorizing filter 28 adsorbs odorous components (diesel exhaust gas odor etc.) in the outside air. At the same time, outside air B ₁ Are removed by the second deodorizing filter 28.
[0062]
In addition, a gap 24 formed between the inner peripheral side of the circumferential wall 14a and the outer peripheral surface of the first deodorizing filter 25 in the rotary door 14 is an outside air inlet through an opening 14m opened in the left support plate 14f. 18 communicates with a part of the outside air from the outside air inlet 18 (for example, about 20% of the total air volume) B ₂ Is introduced into the gap 24. The outside air introduced into the gap 24 passes through the first deodorizing filter 25 in the rotary door 14 to be deodorized and simultaneously removed.
[0063]
The outside air that has passed through the deodorizing filters 25, 28 flows to the outlet side of the inside / outside air switching box 13, passes through the dust removal filter 31, enters the blower casing 35 from the suction port 36 of the blower 12, and is sent to the blower fan 37. Be blown by. This blown air flows into the air conditioning unit 40 from the air outlet portion of the blower casing 35, where the temperature is adjusted after passing through the evaporator 40 a and the heater core 40 b, and then blown into the vehicle interior from the air outlet to air-condition the vehicle interior. To do.
[0064]
By the way, in the all outside air + deodorizing mode, the filter holding member 15 equipped with the second deodorizing filter 28 is operated to a rotational position different from that of the rotary door 14 so that the second deodorizing filter 28 is positioned in front of the outside air inlet 18. Because it faces, outside air B ₁ The front area of the second deodorizing filter 28 with respect to the flow of air increases, and the outside air B with respect to the entire area of the second deodorizing filter 28 ₁ Flows evenly.
[0065]
For this reason, the malodorous component is adsorbed relatively uniformly over the entire area of the second deodorizing filter 28, so that the life of the second deodorizing filter 28 can be extended and the deodorizing efficiency can be improved. Further, since the rotary door 14 is made of a hard plate surface such as resin, the suction sound of the outside air flow is reflected by the door plate surface and may leak into the vehicle interior, but the second deodorizing filter 28 is adsorbed. Since it is composed of a material and a porous filter base material that carries the material, the sound absorbing characteristics are far superior to the rotary door 14. Therefore, when the second deodorizing filter 28 faces the front position of the outside air inlet 18, the suction sound of the outside air flow can be satisfactorily absorbed and reduced by the second deodorizing filter 28.
[0066]
Next, in the flowchart of FIG. 5, when the outside air temperature is higher than the set value in the determination in step 170d, in step 170f, the inside air mode is set (partial outside air is deodorized). FIG. 7 shows a partially mixed outside air mode in step 170f, in which the rotary door 14 and the filter holding member 15 are integrated (with the filter holding member 15 housed in the rotary door 14). 2 is operated to an intermediate opening position rotated leftward by a predetermined angle from the position of FIG.
[0067]
Further, the auxiliary inside air door 21 opens the auxiliary inside air introduction port 20 and is rotated to a position where the tip end of the auxiliary inside air door 21 contacts the support plate 15 e of the filter holding member 15. Here, since the auxiliary inside air door 21 is designed to have the same length as the support plate 15e in the axial direction of the filter holding member 15, the tip of the auxiliary inside air door 21 extends over the entire axial length of the support plate 15e. The portion comes into contact with the support plate 15e.
[0068]
In the inside air mode shown in FIG. 7, the inside air mode is basically the inside air mode, and a part of the outside air (for example, about 30% or less, more specifically about 15%%) is mixed in the inside air. Since the mode is the mode, the intermediate opening (rotation) position of the rotary door 14 and the filter holding member 15 has a large opening area of the inside air introduction port 19 by the circumferential wall 14a of the rotary door 14 and the opening area of the outside air introduction port 18. Is a position where becomes small.
[0069]
Since the rotary door 14 and the filter holding member 15 are integrally rotated at the intermediate opening position as described above, the inside air C is introduced from the inside air introduction port 19 and the auxiliary inside air introduction port 20, and at the same time, the outside air A small amount of outside air B is introduced from the introduction port 18. This small amount of outside air B flows into the opening 14m using the flat auxiliary inside air door 21 as a guide. Then, outside air passes through the first deodorizing filter 25 in the rotary door 14 and the second deodorizing filter 28 of the filter holding member 15 through the gap 24 from the opening 14m and is deodorized.
[0070]
On the other hand, since the inside air C can secure a sufficiently large flow path area by both the inside air introduction port 19 and the auxiliary inside air introduction port 20, it is easy to secure the necessary air volume by the inside air.
The inside air C and a small amount of outside air B flow to the outlet side of the inside / outside air switching box 13 and pass through the dust filter 31. In particular, dust in the inside air C is removed by the dust removal filter 31. After passing through the dust filter 31, the inside air mixed with outside air is blown to the air conditioning unit 40 by the blower 12, where the temperature is adjusted and then blown out into the vehicle interior.
[0071]
By the way, in the above-mentioned partially mixed outside air mode, the outside air is partially mixed into the inside air. Therefore, compared to the all inside air mode, the vehicle interior can be ventilated by partially mixing outside air. CO ₂ Increase in concentration can be suppressed. Therefore, even if this mode is continued for a long time during steady operation after the start-up transition period of heating and cooling has elapsed, CO ₂ The concentration does not increase and is effective as a steady-state inhalation mode.
[0072]
Moreover, since the ratio of the amount of inside air in the blown air is large, the heat load of heating and cooling can be reduced, the capacity is improved by increasing the temperature of the blown air during heating, and the compressor drive power is reduced during cooling. Reduction can be achieved.
Further, since the amount of outside air passing through the first and second deodorizing filters 25 and 28 is small, the flow rate of outside air into the first and second deodorizing filters 25 and 28 can be reduced, and the first and second deodorizing filters can be reduced. The pressure loss in the filters 25 and 28 can be made small, and the first and second deodorizing filters 25 and 28 have a small amount of passing air, which is advantageous in terms of the service life of the first and second deodorizing filters 25 and 28. is there.
[0073]
Next, when it is determined in step 170c that deodorization is not necessary (for example, when running in an outside air environment with a low degree of pollution in the suburbs), a normal all outside air mode is set in step 170g. FIG. 2 shows the all outside air mode by this step 170g, and the rotary door 14 and the filter holding member 15 are integrally rotated to the rightmost position. Therefore, the inside air introduction port 19 is fully closed by the circumferential wall 14a of the rotary door 14, and the outside air introduction port 18 is fully opened. The auxiliary inside air door 21 fully closes the auxiliary inside air introduction port 20.
[0074]
Accordingly, the introduction of the inside air from the inside air introduction ports 19 and 20 is completely blocked, and only the outside air B is introduced into the inside / outside air switching box 13 from the outside air introduction port 18. And most B of the outside air B from the outside air inlet 18 ₁ Advances to the dust removal filter 31 as it is, and the outside air B passes through the dust removal filter 31. ₁ Is removed. Further, a part B of the outside air B from the outside air inlet 18 ₂ Is introduced into the gap 24 through the opening 14m. Outside air B from this gap 24 ₂ Is deodorized by passing through the first and second deodorizing filters 25 and 28 and simultaneously dedusted.
[0075]
After this, outside air B ₂ Is open air B ₁ And passes through the dust filter 31. The outside air is blown by the blower fan 37 of the blower 12, and after the temperature is adjusted by the air conditioning unit 40, the outside air is blown out into the vehicle interior.
As described above, most of the outside air B from the outside air inlet 18 in the normal all outside air mode B ₁ Passes directly to the dust removal filter 31 without passing through the first and second deodorization filters 25, 28, so that it is possible to suppress the occurrence of pressure loss due to both the deodorization filters 25, 28 having high ventilation resistance, and to increase the air volume in the all outside air mode Therefore, the air conditioning capacity can be increased.
[0076]
Next, in step 170a, when the target air temperature (TAO) into the passenger compartment is equal to or lower than a predetermined value X (TAO ≦ X) which is an extremely low temperature range and the inside air mode is selected, the determination in step 170b is NO. In step 170h, it is determined whether deodorization in the inside air mode is necessary. That is, the detection value of the vehicle interior odor sensor 46 is compared with a preset value, and it is determined that deodorization is necessary when the sensor detection value exceeds the set value as in smoking in the vehicle interior. Proceed to step 170i.
[0077]
In step 170i, in addition to the whole room air mode, the whole room air + deodorization mode for deodorizing the room air is set. The mode of step 170i will be described with reference to FIG. 8. The rotary door 14 in the inside / outside air switching device 11 is rotated to the leftmost position in FIG. 8, and the outside air inlet 18 is closed by the circumferential wall 14a. Operated to the fully open position. Thereby, the introduction of outside air from the outside air inlet 18 is completely blocked.
[0078]
On the other hand, the filter holding member 15 is rotated to the rightmost position in FIG. 8 and is located on the inner peripheral side of the inside air introduction port 19. The auxiliary inside air door 21 is rotated to a position where the auxiliary inside air introduction port 20 is fully closed. Since the filter holding member 15 is positioned on the inner peripheral side of the inside air introduction port 19, all the inside air C from the inside air introduction port 18 passes through the second deodorizing filter 28 of the filter holding member 15. Odor components (such as cigarette odor) in the inside air are adsorbed by the adsorbent supported on the inside. At the same time, the dust of the inside air C is also removed by the second deodorizing filter 28.
[0079]
The inside air C that has passed through the second deodorizing filter 28 is then blown by the blower fan 37 of the blower 12 after passing through the dust removal filter 31, and after being adjusted in temperature by the air conditioning unit 40, Air-condition the passenger compartment.
By the way, in the whole room air + deodorization mode, the filter holding member 15 equipped with the second deodorization filter 28 is operated to a rotational position different from that of the rotary door 14, and the second deodorization filter 28 is positioned in front of the inside air inlet 19. Therefore, the front area of the second deodorizing filter 28 with respect to the flow of the inside air C becomes large, and the inside air C flows uniformly over the entire area of the second deodorizing filter 28.
[0080]
Therefore, for the same reason as in the all outside air + deodorization mode of FIG. 6, the life of the second deodorization filter 28 can be extended and the deodorization efficiency can be improved, and the suction sound of the internal air flow is generated by the second deodorization filter 28. It can be absorbed and reduced well.
Next, when the odor level in the passenger compartment is low, the determination in step 170h is no need for deodorization, and the routine proceeds to step 170j, where the normal all-air mode is set. In this all-in-air mode, as shown in FIG. 9, the rotary door 14 and the filter holding member 15 are integrated and rotated to the leftmost position. Therefore, the outside air inlet 18 is fully closed by the circumferential wall 14a of the rotary door 14, and the inside air inlet 19 is fully opened. Further, the auxiliary inside air door 21 opens the auxiliary inside air introduction port 20.
[0081]
Accordingly, the introduction of the outside air from the outside air introduction port 18 is completely blocked, and only the inside air C is introduced into the inside / outside air switching box 13 from the inside air introduction ports 19 and 20. Then, the inside air C from the inside air introduction port 19 and the inside air C from the auxiliary inside air introduction port 20 proceed toward the dust removal filter 31 as they are, and the dust removal filter 31 removes dust from the inside air C. The inside air that has passed through the dust removal filter 31 is blown by the blower fan 37 of the blower 12, the temperature is adjusted by the air conditioning unit 40, and then blown into the vehicle interior.
[0082]
As described above, in the normal all-air mode, the inside air C from the inside air introduction port 19 and the auxiliary inside air introduction port 20 does not pass through the first and second deodorizing filters 25 and 28, but directly to the dust removal filter 31. Therefore, pressure loss due to the two deodorizing filters 25 and 28 having large ventilation resistance does not occur, the air volume can be increased in the all-in-air mode, and the air conditioning capacity can be increased.
[0083]
The inside / outside air suction mode of the first embodiment is summarized as follows: (1) the whole outside air + deodorization mode of FIG. 6, (2) the inside air mode of partial mixing of outside air (the outside air is deodorized), and (3) A total of 5 outside / inside air intake modes, that is, the normal all outside air mode shown in FIG. 2, (4) the all inside air + deodorization mode shown in FIG. 8, and (5) the normal all inside air mode shown in FIG. 9 can be set. FIG. 10 collectively shows operation patterns of the rotary door 14, the filter holding member 15, and the auxiliary inside air door 21 in the five inside / outside air suction modes.
[0084]
(Second Embodiment)
In the first embodiment described above, the rotary door 14 is equipped with the first deodorizing filter 25, and the filter holding member 15 is equipped with the second deodorizing filter 28. In the second embodiment, FIGS. As shown, the first deodorizing filter 25 in the rotary door 14 is eliminated. Accordingly, in the rotary door 14, a support plate 14f at one end in the circumferential direction of the circumferential wall 14a, an opening 14m provided in the support plate 14f, and a projecting piece 14h to support the lower surface portion of the first deodorizing filter 25. 14k has also been abolished.
[0085]
In addition, as another difference, in the first embodiment, the filter holding member 15 is not projected to the outside in the circumferential direction of the rotary door 14, and the filter holding member is arranged on the inner peripheral side of the rotary door 14. 15 is accommodated. Therefore, the second deodorizing filter 28 provided in the filter holding member 15 is also configured not to protrude outward in the circumferential direction of the rotary door 14.
[0086]
On the other hand, in the second embodiment, the filter holding member 15 is housed on the inner peripheral side of the rotary door 14 so that the filter holding member 15 protrudes outside in the circumferential direction of the rotary door 14. It is said. Therefore, the second deodorizing filter 28 provided in the filter holding member 15 is also configured to protrude outward in the circumferential direction of the rotary door 14.
[0087]
FIG. 11 shows an inside air mode in which outside air is partially mixed (the outside air is deodorized) corresponding to FIG. 7 of the first embodiment, and the outside door 14 and the filter holding member 15 are operated to the intermediate opening position, 18 is opened by a small opening, and the inside air inlet 19 is opened by a large opening. Further, the auxiliary inside air door 21 opens the auxiliary inside air introduction port 20. At this time, the second deodorizing filter 28 of the filter holding member 15 protrudes toward the outside air inlet 18 on the outer side in the circumferential direction of the rotary door 14.
[0088]
Therefore, the outside air B from the outside air inlet 18 flows through the second deodorizing filter 28 from the gap 24 inside the circumferential wall 14a of the rotary door 14. ₂ And the flow B that does not flow into the gap 24 and passes directly through the second deodorizing filter 28 ₁ And are formed.
As described above, according to the second embodiment, the second deodorizing filter 28 protrudes toward the outside air inlet 18 on the outer side in the circumferential direction of the rotary door 14, thereby passing through the second deodorizing filter 28. The amount of outside air that is deodorized can be increased.
[0089]
FIG. 12 shows a normal all-out air mode corresponding to FIG. 2 of the first embodiment, in which the rotary door 14 and the filter holding member 15 are operated to the rightmost position so that the outside air introduction port 18 is fully opened and the inside air introduction port is opened. 19 is fully closed. The auxiliary inside air door 21 closes the auxiliary inside air introduction port 20. As a result, most of the outside air B from the outside air inlet 18 is B. ₁ Proceeds to the dust filter 31 as it is, and a part B of the remaining outside air B ₂ Passes through the gap 24 and passes through the second deodorizing filter 28 to be deodorized and simultaneously dedusted.
[0090]
FIG. 13 shows a normal all-in-air mode corresponding to FIG. 9 of the first embodiment, where the rotary door 14 and the filter holding member 15 are operated to the leftmost position, the outside air inlet 18 is fully closed, and the inside air is introduced. Open mouth 19 fully. Further, the auxiliary inside air door 21 opens the auxiliary inside air introduction port 20.
As a result, the inside air C from the inside air introduction port 19 and the inside air C from the auxiliary inside air introduction port 20 proceed toward the dust removal filter 31 as they are, and the inside air C is removed by the dust removal filter 31. At this time, since the second deodorizing filter 28 protrudes outward in the circumferential direction of the rotary door 14 toward the inside air introduction port 19, a part of the inside air C from the inside air introduction port 19 passes through the second deodorizing filter 28. Then deodorized and dust removed.
[0091]
Although not shown, also in the second embodiment, by operating the rotary door 14 and the filter holding member 15 to different rotational positions, the all-outside air + deodorization mode of FIG. 6 of the first embodiment and FIG. A mode equivalent to the whole inside air + deodorization mode can be set.
(Third embodiment)
14-17 is 3rd Embodiment, The basic structure is the same as 2nd Embodiment mentioned above, FIGS. 14-16 is a part of outside air corresponding to FIGS. The outside air indicates a deodorizing) inside air mode, a normal all outside air mode, and a normal all inside air mode, and FIG. 17 is an enlarged view of a main part of the third embodiment.
[0092]
In the third embodiment, the rotary door 14 for switching the inside / outside air is configured by a substantially arc-shaped circumferential wall 14a, and a gear surface 50 is formed on the inner circumferential surface of the circumferential wall 14a. The drive gear 51 is engaged. The drive gear 51 is connected to a servo motor 47 (see FIG. 3) via a rotation shaft (not shown), and the rotary door 14 is rotated via the drive gear 51 by the rotational force of the servo motor 47.
[0093]
A cylindrical support shaft 14e (corresponding to the support shaft 14e in FIG. 1) protruding outward is integrally formed at both ends in the circumferential direction of the circumferential wall 14a of the rotary door 14 and at both ends in the axial direction. Yes. Accordingly, a total of four support shafts 14 e are provided on the circumferential wall 14 a of the rotary door 14. An arc-shaped bearing groove 23 (corresponding to the bearing groove 23 in FIG. 1) into which the two support shafts 14e are inserted by loose fitting is a protrusion 23a on the side wall of the inside / outside air switching box 13 (FIG. 17). Is provided.
[0094]
Accordingly, the support shafts 14e are inserted into the arc-shaped bearing grooves 23 by two in a loose fit and are slidably supported. The maximum rotation of the rotary door 14 is determined by the circumferential angle of the arc-shaped bearing grooves 23. A range (rotation angle) is determined.
By the way, a sealing material 26 made of an elastic material such as rubber is fixed to the outer peripheral surface of the circumferential wall 14a of the rotary door 14 by bonding or the like. The sealing material 26 is open to the outside air inlet 18 and the inside air inlet 19. It has a quadrangular (rectangular) frame shape corresponding to the edge. If the sealing material 26 is constantly in pressure contact with the inner surface of the arcuate circumferential wall 17 of the inside / outside air switching box 13 during the rotation operation of the rotary door 14, the rotary door 14 is caused by friction at the front end surface of the sealing material 26. This causes the problem that the rotational operation force increases.
[0095]
Therefore, in the third embodiment, when the rotary door 14 moves between the all-outside air position in FIG. 15 and the all-inside air position in FIG. 16, the front end surface of the sealing material 26 is the arc-shaped circumferential wall surface 17. To be away from the inner surface of Therefore, with respect to the rotational position of the rotary door 14 at the all-outside air position in FIG. 15 and the all-inside air position in FIG. The shapes of the rotary door 14 and the arc-shaped bearing groove 23 are set so as to shift to the center 16 side (inward in the radial direction).
[0096]
Thereby, at the above intermediate position, the friction at the front end surface of the sealing material 26 can be reduced or the friction at the front end surface can be eliminated, and the rotational operation force of the rotary door 14 can be reduced. However, since the sealing action by the sealing material 26 cannot be exhibited at the intermediate position described above, the support shaft is at the rotation position (intermediate rotation position) in the outside air-mixed internal air mode of the rotary door 14 shown in FIG. It has been found that there is a problem in that outside air passes (bypasses) through the loosely fitting portion between 14e and the arc-shaped bearing groove 23.
[0097]
Since the outside air passing through the loose fitting portion is mixed directly into the flow of the inside air from the inside air introduction port 19 from the outside air introduction port 18, it cannot be deodorized by the deodorization filter 28.
Therefore, as shown in FIG. 17, a seal member 52 is attached to the support shaft 14e to prevent the bypass of the outside air. That is, the seal member 52 has an arc shape formed along the axial end surface of the circumferential wall 14a of the rotary door 14, and is bonded between the two side plates 52a and the two side plates 52a. And an elastic body 52b. The seal member 52 has a hole 52c penetrating in the axial direction, and the support shaft 14e is inserted into the hole 52c. The seal member 52 is sandwiched and held between the axial end surface of the circumferential wall 14a of the rotary door 14 and the end surface of the protruding portion 23a of the side wall of the inside / outside air switching box 13.
[0098]
When the rotary door 14 is rotated, one of the side plates 52a slides on the end surface of the protruding portion 23a of the side wall of the inside / outside air switching box 13, so that the side plate 52a has low friction and wear resistance. It is preferable to form with an excellent material, for example, a stainless plate. The elastic body 52b absorbs the dimensional variation of each part in the axial direction, and the two side plates 52a are attached to the axial end face of the circumferential wall 14a of the rotary door 14 and the end face of the protruding part 23a of the side wall of the inside / outside air switching box 13. An elastic repulsive force is generated for surely pressing, and is made of, for example, an elastic material such as porous urethane foam. When the seal member 52 is assembled, the elastic body 52b is compressed by a predetermined amount, and the seal member The axial thickness t of 52 is set to a predetermined dimension. The sealing member 52 on the opposite side in the axial direction may be configured by only one side plate 52a without the elastic body 52b.
[0099]
According to the third embodiment, such a seal member 52 is pressed against the axial end surface of the circumferential wall 14a of the rotary door 14 and the end surface of the protruding portion 23a of the side wall of the inside / outside air switching box 13, and thus the support shaft 14e. It is possible to satisfactorily prevent the outside air from bypassing the loosely-fitting portion between the arcuate bearing groove 23 and the arc.
In the third embodiment, the filter holding member 15 and the auxiliary shaft are connected to the rotary shaft 15d of the filter holding member 15 via the link mechanism shown in FIGS. The inside air door 21 is interlocked with one servo motor 48 (FIG. 3).
[0100]
Further, among the side walls of the inside / outside air switching box 13, there is a first frame that protrudes in a frame shape at the center in the circumferential direction, and forms contact surfaces of the support plates 15 e and 15 f at both ends in the circumferential direction of the filter holding member 15. One frame-like protrusion 53 is formed. Further, a second frame-like projecting portion 54 that forms a contact surface of the support plate 15 e at one end in the circumferential direction of the filter holding member 15 is formed adjacent to the auxiliary inside air door 21.
[0101]
Accordingly, the support plate 15e at one end in the circumferential direction of the filter holding member 15 is in contact with the second frame-shaped projecting portion 54 at the rotation position of the rotary door 14 in the outside air mixed with inside air mode shown in FIG. Further, one end side in the circumferential direction of the deodorizing filter 28 (left side in FIG. 14) is bypassed to prevent outside air from flowing. Further, the support plate 15 f at the other end in the circumferential direction of the filter holding member 15 contacts the seal surface 53 a on one side of the first frame-like protruding portion 53. Thereby, the other end side in the circumferential direction of the deodorizing filter 28 (the right side in FIG. 14) is bypassed to prevent the outside air from flowing.
[0102]
In the normal all-out air mode position shown in FIG. 15, the support plate 15 e at one end in the circumferential direction of the filter holding member 15 contacts the seal surface 53 b on the other side of the first frame-like protruding portion 53. Thereby, it is possible to prevent the outside air from flowing through the deodorizing filter 28 and to extend the life of the deodorizing filter 28. Similarly, in the normal all-air mode position shown in FIG. 16, the life of the deodorizing filter 28 is extended by preventing the inside air from passing through the deodorizing filter 28.
[0103]
18 to 20 exemplify a link mechanism for operating the filter holding member 15 and the auxiliary inside air door 21 in an interlocking manner, and FIGS. 18 to 20 show operation modes corresponding to FIGS. 14 to 16, respectively. The lever 55 is connected to the rotation shaft 15 d of the filter holding member 15, and the lever 56 is connected to the rotation shaft 21 a of the auxiliary inside air door 21. The ends of the levers 55 and 56 are connected to each other by a single link rod 57 so as to be rotatable, and the output shaft of the servo motor 48 is connected to the rotating shaft 15d of the filter holding member 15. Thus, the filter holding member 15 and the auxiliary inside air door 21 can be operated in an interlocked manner with one servo motor 48. Since other points are the same as those of the second embodiment, description thereof is omitted.
[0104]
(Other embodiments)
(1) In the second and third embodiments described above, the case where the first deodorizing filter 25 in the rotary door 14 is eliminated has been described. However, both the filter holding member 15 and the second deodorizing filter 28 are eliminated, and the rotary door is eliminated. 14 and the first deodorizing filter 25 may be used.
[0105]
In this case, since the suction mode (that is, the total outside air + deodorization mode in FIG. 6 and the total inside air + deodorization mode in FIG. 8) that rotates the filter holding member 15 to a different rotation position from the rotary door 14 cannot be realized. Only three intake modes, that is, an inside air mode in which outside air is partially mixed (the outside air is deodorized), a normal all outside air mode, and a normal all inside air mode are set.
[0106]
(2) In the first embodiment described above, the rotary door 14 is equipped with the first deodorizing filter 25, and the filter holding member 15 is equipped with the second deodorizing filter 28. However, the first deodorizing filter 25 and the second deodorizing filter 25 are provided. If a dust filter is disposed on the upstream side of the air flow of the deodorizing filter 28 and the dust filter is also configured to rotate integrally with the rotary door 14 and the filter holding member 15, the air removed by the dust filter is the first. Since it passes through the second deodorizing filters 25, 28, it is possible to prevent dust from adhering to the first and second deodorizing filters 25, 28 and prolong the life of the first and second deodorizing filters 25, 28. Can be planned.
[0107]
As described above, as the dust removal filter disposed on the upstream side of the air flow of the first and second deodorization filters 25 and 28, dust removal that captures finer particles than the dust removal filter 31 located on the outlet side of the inside / outside air switching box 13 is possible. It is preferable to prevent fine particles from adhering to the first and second deodorizing filters 25 and 28 using a filter.
(3) In the first embodiment described above, the case where the three members of the rotary door 14, the filter holding member 15, and the auxiliary inside air door 21 are driven by independent servo motors (actuators) 47 to 49 has been described. For example, the servo motor 49 of the auxiliary internal air door 21 can be eliminated, and the auxiliary internal air door 21 can be operated in conjunction with the rotary door 14 or the filter holding member 15 via an appropriate link mechanism or the like. In the third embodiment, the auxiliary inside air door 21 is operated in conjunction with the filter holding member 15.
[0108]
(4) In the first and second embodiments described above, the rotary door (inside / outside air switching door) 14 and the filter holding member 15 are both configured as rotating members that rotate around the rotation center 16. However, the circumferential wall surface 17 of the inside / outside air switching box 13 is abolished, and instead, a flat wall surface is formed in the inside / outside air switching box 13, and an outside air introduction port 18 and an inside air introduction port 19 are provided on the flat wall surface, Inside this flat wall surface, a flat plate-like inside / outside air switching door 14 slidable (slidable) along the flat wall surface is installed and slidable further inside (air downstream side) of the inside / outside air switching door 14. A flat filter holding member 15 may be installed.
[0109]
(5) The present invention can also be applied to the inside / outside air switching device 11 that does not have the auxiliary inside air introduction port 20 and the auxiliary inside air door 21.
(6) Further, in each of the above-described embodiments, the inside air or the outside air introduced into the inside / outside air switching box 13 as the dust removal filter 31 built in the position immediately before the blower suction port 36 on the outlet side of the inside / outside air switching box 13. Although only a dust removing function for removing dust in the outside air is provided, the dust removing filter 31 may be configured to have a deodorizing function supplementarily based on this dust removing function (basic). Specifically, an adsorbent (activated carbon, etc.) that adsorbs malodorous components such as cigarette odor, sweat odor, pet odor, and new car odor in the inside air or outside air is supported on the filter paper, and the filter paper is folded into a corrugated shape. The dust filter 31 is configured by processing. Here, the ventilation resistance (pressure loss) of the dust removing filter 31 with the deodorizing function is significantly smaller than the first and second deodorizing filters 25 and 28 (for example, 1/2 to 1/3 or less). To design.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, showing a sectional shape in a vehicle left-right direction.
FIG. 2 is a longitudinal sectional view showing a normal all-out air mode of the first embodiment, showing a sectional shape in a vehicle longitudinal direction.
FIG. 3 is an electric control block diagram of the first embodiment.
FIG. 4 is a flowchart of electric control according to the first embodiment.
FIG. 5 is a detailed flowchart of a main part of the electric control in FIG. 4;
FIG. 6 is a longitudinal sectional view showing a normal all-outside air + deodorizing mode according to the first embodiment, showing a sectional shape in the vehicle longitudinal direction.
FIG. 7 is a longitudinal sectional view showing a partially mixed outside air mode according to the first embodiment, and shows a sectional shape in the vehicle front-rear direction.
FIG. 8 is a longitudinal sectional view showing the whole inside air + deodorizing mode according to the first embodiment, showing a sectional shape in the vehicle longitudinal direction.
FIG. 9 is a longitudinal sectional view showing a normal all-in-air mode of the first embodiment, showing a sectional shape in the vehicle front-rear direction.
FIG. 10 is a characteristic diagram showing a door operation pattern of the first embodiment.
FIG. 11 is a longitudinal sectional view showing a partially mixed outside air mode according to the second embodiment, and shows a sectional shape in the vehicle longitudinal direction.
FIG. 12 is a longitudinal sectional view showing a normal all-out air mode of the second embodiment, showing a sectional shape in the vehicle front-rear direction.
FIG. 13 is a longitudinal sectional view showing a normal all-in-air mode of the second embodiment, showing a sectional shape in the vehicle front-rear direction.
FIG. 14 is a longitudinal sectional view showing an outside air partially mixed inside air mode according to a third embodiment, showing a sectional shape in the vehicle longitudinal direction.
FIG. 15 is a longitudinal sectional view showing a normal all-out air mode of the third embodiment, showing a sectional shape in the longitudinal direction of the vehicle.
FIG. 16 is a longitudinal sectional view showing a normal all-in-air mode of the third embodiment, showing a sectional shape in the vehicle front-rear direction.
FIG. 17 is an enlarged cross-sectional view of a support shaft portion of an internal / external air switching rotary door according to a third embodiment.
18 is a longitudinal sectional view showing a link mechanism for interlocking operation between the filter holding member and the auxiliary inside air door in the third embodiment, and shows a partially mixed outside air mode corresponding to FIG.
19 is a longitudinal sectional view showing the link mechanism, and shows a normal all-out air mode corresponding to FIG.
20 is a longitudinal sectional view showing the link mechanism, and shows a normal all-air mode corresponding to FIG.
[Explanation of symbols]
13 ... Inside / outside air switching box, 14 ... Inside / outside air switching rotary door, 14a ... Circumferential wall,
15 ... Filter holding member, 18 ... Outside air introduction port, 19 ... Inside air introduction port,
20 ... Auxiliary inside air inlet, 21 ... Auxiliary inside air door, 25, 28 ... Deodorizing filter.

Claims (12)

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;
An inside / outside air switching door (14) arranged displaceably in the inside / outside air switching box (13),
In the vehicle air conditioner configured to open and close the outside air introduction port (18) and the inside air introduction port (19) by the displacement of the wall (14a) provided in the inside / outside air switching door (14), the inside / outside air A deodorizing filter (25) that adsorbs malodorous components in the air is disposed on the downstream side of the wall (14a) of the switching door (14) via a gap (24) at a predetermined interval from the wall (14a). In addition, the deodorizing filter (25) is displaced integrally with the inside / outside air switching door (14),
When the inside / outside air switching door (14) is displaced to an intermediate opening position where the wall (14a) opens both the outside air introduction port (18) and the inside air introduction port (19) at an intermediate opening degree, The flow of internal air that flows directly from the internal air inlet (19) to the outlet side of the internal / external air switching box (13), and the deodorizing filter (25) from the external air inlet (18) through the gap (24) And a flow of outside air that flows to the outlet side of the inside / outside air switching box (13). The inside / outside air switching box (13) is provided independently of the inside air introduction port (19), and an auxiliary inside air introduction port (20) for introducing inside air, and an auxiliary inside air door for opening and closing the auxiliary inside air introduction port (20). (21)
When the inside / outside air switching door (14) is displaced to the intermediate opening position, the auxiliary inside air door (21) is displaced to the open position of the auxiliary inside air introduction port (20) and the outside air introduction port (18). The vehicle air conditioner according to claim 1, wherein the flow of outside air is guided by the auxiliary inside air door (21) so that outside air flows into the gap (24). Of the inside / outside air switching box (13), the inside / outside air switching door (14) can be displaced independently of the inside / outside air switching door (14) to a downstream side of the wall (14a) of the wall (14a). A filter holding member (15);
A deodorizing filter (28) that adsorbs malodorous components in the air is also disposed on the filter holding member (15), and the deodorizing filter (28) is displaced integrally with the filter holding member (15),
One of the outside air introduction port (18) and the inside air introduction port (19) is closed by the wall (14a) of the inside / outside air switching door (14), and the other introduction port is opened. When it is necessary to deodorize the air from the introduced inlet, the filter holding member (15) is displaced toward the opened inlet, and the air from the opened inlet is moved to the filter holding member ( 15) through the deodorizing filter (28),
And when it is not necessary to deodorize the air from the open inlet, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14). The vehicle air conditioner according to claim 1 or 2, wherein the vehicle air conditioner is provided. The inside / outside air switching door is a rotary door (14) arranged so as to be rotatable about its rotation center (16).
The wall portion is an arcuate circumferential wall (14a) centered on the rotation center (16), and the outside air introduction port (18) and the inside air introduction port are rotated by the rotation of the arcuate circumferential wall (14a). (19) is designed to open and close,
The deodorizing filter (25) is disposed on the inner peripheral side of the circumferential wall (14a) via a gap (24) with a predetermined interval, and the deodorizing filter (25) is rotated integrally with the rotary door (14). The vehicle air conditioner according to any one of claims 1 to 3, wherein the vehicle air conditioner is operated.   When the inside / outside air switching door (14) is displaced to the intermediate opening position, the ratio of outside air introduction to the total amount of air introduced from the outside air introduction port (18) and the inside air introduction port (19) is set to 30% or less. The vehicle air conditioner according to any one of claims 1 to 4. 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;
An inside / outside air switching door (14) arranged displaceably in the inside / outside air switching box (13),
In the vehicle air conditioner configured to open and close the outside air introduction port (18) and the inside air introduction port (19) by the displacement of the wall (14a) provided in the inside / outside air switching door (14), the inside / outside air A filter holding member that can be displaced independently of the inside / outside air switching door (14) in a portion of the inside of the switching box (13) on the downstream side of the wall (14a) of the inside / outside air switching door (14). (15)
A deodorizing filter (25) that adsorbs deodorizing components in the air is disposed on the downstream side of the wall (14a) of the inside / outside air switching door (14) through a gap (24) at a predetermined interval from the wall (14a). The deodorizing filter (25) is integrally displaced with the inside / outside air switching door (14),
A deodorizing filter (28) that adsorbs malodorous components in the air is also disposed in the filter holding member (15) , and the deodorizing filter (28) is displaced integrally with the filter holding member (15),
One of the outside air introduction port (18) and the inside air introduction port (19) is closed by the wall (14a) of the inside / outside air switching door (14), and the other introduction port is opened. When it is necessary to deodorize the air from the introduced inlet, the filter holding member (15) is displaced toward the opened inlet, and the air from the opened inlet is moved to the filter holding member ( 15) through the deodorizing filter (28),
And when it is not necessary to deodorize the air from the open inlet, the filter holding member (15) is displaced to the air downstream side of the wall (14a) of the inside / outside air switching door (14). ,
Further, when the inside / outside air switching door (14) is displaced to an intermediate opening position where the wall (14a) opens both the outside air introduction port (18) and the inside air introduction port (19) at an intermediate opening degree. The flow of internal air that flows directly from the inside air introduction port (19) to the outlet side of the inside / outside air switching box (13) and the inside / outside air switching door (from the outside air introduction port (18) through the gap (24)) 14) and the flow of outside air flowing through the outlet side of the inside / outside air switching box (13) after passing through the deodorizing filter (25) of 14) and the deodorizing filter (28) of the filter holding member (15). A vehicle air conditioner characterized by the above. A vehicle exterior odor sensor (45) for detecting odor components outside the vehicle compartment,
When it is determined that the outside air needs to be deodorized based on the detection signal of the outside odor sensor (45), the inside / outside air switching door (14) is displaced to the intermediate opening position. The vehicle air conditioner according to any one of claims 1, 2, and 6 . A vehicle exterior odor sensor (45) for detecting an odor component outside the vehicle compartment and an outside air temperature sensor (44) for detecting the outside air temperature,
It is determined that it is necessary to deodorize the outside air based on the detection signal from the outside odor sensor (45), and the outside temperature is equal to or lower than a predetermined temperature corresponding to the cold time based on the detection signal from the outside temperature sensor (44). When the inside / outside air switching door (14) is determined to be, the outside air introduction port (18) is fully opened and the inside air introduction port (19) is fully closed. Displace the filter holding member (15) toward the outside air introduction port (18), and allow outside air from the outside air introduction port (18) to pass through the deodorizing filter (28) of the filter holding member (15). The vehicle air conditioner according to claim 6 . A vehicle interior odor sensor (46) for detecting odor components in the vehicle interior,
When the outside air introduction port (18) is fully closed and the inside air introduction port (19) is fully opened, the inside air deodorization is performed based on the detection signal of the vehicle interior odor sensor (46). When it is determined that the inside / outside air switching door (14) needs to be moved, the inside / outside air switching door (14) is displaced to the all inside air mode position and the filter holding member (15) is displaced toward the inside air introduction port (19). Te, a vehicle according to any one of claims 6 to 8, characterized in that passing the deodorizing filter (28) of the inside air from the inside air inlet port (19) filter support member (15) Air conditioner. A support shaft (14e) is formed at the end of the wall portion (14a) of the inside / outside air switching door (14) in a direction orthogonal to the direction of the displacement,
Forming a groove (23) for slidably fitting and supporting the support shaft (14e) on the wall surface of the inside / outside air switching box (13);
Wherein the fitting portion between the support shaft (14e) and said groove (23) in any one of 6 to claim, characterized in that it comprises a sealing member (52) to prevent the flow of air 9 Vehicle air conditioner. The sealing member (52) includes a side plate (52a) made of two low friction materials and an elastic body (52b) disposed between the two side plates (52a).
The side plate (52a) is in pressure contact with the end of the wall (14a) and the end of the groove (23) of the inside / outside air switching door (14) by the elastic repulsive force of the elastic body (52b). The vehicle air conditioner according to claim 10 . The inside / outside air switching door is a rotary door (14) arranged so as to be rotatable about its rotation center (16).
The wall is an arcuate circumferential wall (14a) centered on the center of rotation (16);
The outside air introduction port (18) and the inside air introduction port (19) are opened and closed by rotation of the arc-shaped circumferential wall (14a),
The filter holding member (15) is disposed so as to be rotatable about the rotation center (16),
The vehicle air conditioner according to any one of claims 6 to 11 , wherein the deodorizing filter ( 28 ) rotates integrally with the filter holding member (15) .

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