JP3837884B2 - 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]
The present applicant has previously filed Japanese Patent Application No. 9-297520 as a vehicle air conditioner. In this prior application device, the purpose of the vehicle air conditioner is to ensure both the vehicle interior ventilation function and the outside air deodorizing function by introducing the outside air, and the avoidance of the decrease in the air volume of the air conditioner due to the high pressure loss of the deodorizing filter. In order to achieve this object, a partially mixed outside air mode can be set as the inside / outside air mode.
[0003]
As shown in FIG. 8, the partially outside air mixed inside air mode is an intermediate opening degree at which the circumferential wall 14 a of the rotary type inside / outside air switching door 14 opens both the outside air introduction port 18 and the inside air introduction port 19 at an intermediate opening degree. When the position is displaced, the flow of the internal air that flows directly from the internal air introduction port 19 to the outlet side of the internal / external air switching box 13 and the internal / external air switching after passing through the first deodorizing filter 25 through the gap 24 from the external air introduction port 18 A flow of outside air flowing to the outlet side of the box 13 is formed.
[0004]
Moreover, in the said prior application apparatus, a total of five modes can be switched as an inside / outside air mode, and all the outside air + deodorizing mode can be set as one in addition to the said some outside air mixing inside air mode. Yes.
In this all outside air + deodorization mode, all the outside air from the outside air inlet 18 is passed through the second deodorizing filter 28 as shown in FIG. 6 so that the diesel exhaust gas odor from the front vehicle flows into the vehicle interior. To prevent.
[0005]
And in the said prior application apparatus, the vehicle exterior odor sensor 45 (refer FIG. 3) which detects the odor component outside a vehicle interior is arrange | positioned, and the detection signal of this vehicle exterior odor sensor 45 is larger than a setting value, and there exists an odor in external air Sometimes, either the partially outside air mixed inside air mode or the all outside air + deodorizing mode is used. Specifically, when the outside air temperature is lower than a predetermined temperature and the vehicle window glass is likely to be fogged, the above described outside air + deodorization mode is set. Set to shy mode. On the other hand, when the detection signal of the vehicle exterior odor sensor 45 is smaller than the set value and there is no odor in the outside air, normal all outside air that blows the outside air into the vehicle interior without almost removing the odor of the outside air as shown in FIG. Mode.
[0006]
[Problems to be solved by the invention]
However, in the above-mentioned prior application device, when it is determined by the odor sensor outside the passenger compartment that there is an odor, it is selected to use one of the partially outside air mixed inside air mode and the all outside air + deodorizing mode, When the outside air is very dirty and the odor is quite odorous, there is a problem that the first deodorizing filter cannot absorb the odor and the odor enters the vehicle interior.
[0007]
Therefore, a first object of the present invention is to achieve both 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, and further reducing the odor of the outside air. It is an object of the present invention to provide a vehicle air conditioner that can completely prevent entry into a vehicle interior.
The prior application device has the following problems. As described above, when there is odor in the outside air, either the partially outside air mixed inside air mode or the all outside air + deodorizing mode is used, and when there is no odor in the outside air, the all outside air mode is used. For this reason, for example, in a town where there is a lot of traffic and the outside air is dirty on average, when the vehicle stops ahead at an intersection or the like, the exhaust air from the front vehicle and the all outside air mixed mode are When either the outside air + deodorizing mode is used and the vehicle ahead moves away from the host vehicle, the operation frequently switches to the all outside air mode.
[0008]
As a result, in towns where the outside air is dirty on average, if such switching between the inside and outside air modes occurs frequently, the operation delay due to the response of the inside / outside air switching door or the odor during the switching between the inside and outside air modes will occur. There is a problem that the frequency of the contained outside air entering the vehicle interior increases.
On the other hand, for example, in the suburbs where the outside air is relatively clean, the switching between the inside and outside air modes is less than in the town, so the outside air containing odor is less likely to enter the vehicle interior, so the vehicle interior is quickly ventilated. I want.
[0009]
Therefore, the second object of the present invention is caused by the local environment while ensuring both the vehicle interior ventilation function and the outside air deodorizing function by introducing the outside air and the avoidance of the decrease in the air volume of the air conditioner due to the high pressure loss of the deodorizing filter. It is to reduce the intrusion of odors into the vehicle interior.
[0010]
[Means for Solving the Problems]
In order to achieve the first object, according to the first aspect of the present invention, if it is determined that it is not necessary to deodorize the outside air based on the detection signal detected by the outside odor sensor (45), the inside and outside air If it is determined that the outside air mode needs to be deodorized based on the detection signal detected by the vehicle exterior odor sensor (45), the odor detected by the vehicle exterior odor sensor (45) is large. The inside / outside air mode is set in the order of the partially outside air mixed inside air mode and the all inside air mode, and the inside / outside air is ordered in the order of the all inside air mode and the partially outside air mixed inside air mode as the odor detected by the outside odor sensor (45) decreases. It is characterized by setting the mode.
[0011]
According to this, in the partially mixed outside air mode, the outside air can be mixed into the inside air and introduced into the vehicle interior, and the vehicle interior ventilation can be achieved by introducing the outside air. Moreover, since the outside air from the outside air inlet can be deodorized by passing through the deodorizing filter, it is possible to prevent the diesel exhaust gas odor from the front vehicle from flowing into the vehicle interior.
Furthermore, the amount of deodorized air that passes through the deodorizing filter 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 flow passage on the inside air inlet side where the pressure loss is small. Even in such a case, the decrease in the total introduced air volume can be suppressed to a small extent.
[0012]
In addition to these, in the present invention, as the odor detected by the odor sensor outside the passenger compartment increases, the inside / outside air mode is set in the order of partially outside air mixed inside air mode and all inside air mode. When there is a smell, the inside / outside air mode becomes the whole inside air mode. For this reason, it is possible to prevent the odor of the outside air from completely entering the vehicle interior.
[0013]
In order to achieve the second object, the invention according to claim 2 further comprises a determination means (170p) for determining whether or not the area where the vehicle is present is a contaminated area, and the determination means (170p). If it is determined that it is necessary to deodorize the outside air based on the detection signal detected by the outside odor sensor (45), the inside / outside air mode is set to the all inside air mode. When it is determined that it is not necessary to deodorize the outside air, the inside / outside air processing (170q to 170s) is performed with the inside / outside air mode as the partial outside air mixing mode,
When it is determined by the determination means (170p) that the area is not a contaminated area, if it is determined that it is necessary to deodorize the outside air based on the detection signal detected by the outside odor sensor (45), the inside / outside air mode Is a partially mixed outside air mode, and it is determined that it is not necessary to deodorize the outside air, the inside / outside air processing (170t to 170v) is performed in which the inside / outside air mode is set to the all outside air mode.
[0014]
As a result, as in the first aspect of the invention, it is possible to prevent the diesel exhaust gas odor or the like from the front vehicle from flowing into the vehicle interior, and it is possible to suppress a decrease in the total amount of introduced air.
Furthermore, in the present invention, for example, in a contaminated area where there is a lot of traffic and the outside air is dirty, the inside / outside air mode is switched between the one-part outside air mixed inside air mode and the all inside air mode. For this reason, it is possible to prevent the odor from entering the vehicle compartment as compared with the above-mentioned prior application device. As a result, the intrusion of the odor caused by the local environment into the vehicle interior can be reduced.
[0015]
Furthermore, in the contaminated area, even if outside air deodorization is not necessary, the inside / outside air mode is partially mixed with outside air, so even if there is a delay in the sensor response, the vehicle interior ventilation function and outside air deodorizing function can be achieved by introducing outside air. Can be reliably ensured, and a reduction in the air volume of the air conditioner due to the high pressure loss of the filter can be avoided.
On the other hand, for example, in the suburbs where the outside air is relatively clean, since the switching between the inside and outside air modes is less than in the town, the frequency of outside air containing odors entering the vehicle interior is low. For this reason, in the present invention, since the inside / outside air mode is switched between the partially outside air mixed inside air mode and the all outside air mode, the vehicle interior can be ventilated quickly and in a short time.
[0016]
According to a third aspect of the present invention, there is provided an outside air temperature sensor (44) for detecting an outside air temperature, and the outside air temperature is equal to or higher than a predetermined temperature corresponding to a cold time based on a detection signal of the outside air temperature sensor (44). When it is determined that there is, the inside / outside air processing (170g to 170j, 170t to 170v) is performed.
By the way, in the vehicle air conditioner, the compressor of the 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. 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 the window glass from being fogged due to mixing of inside air (high humidity).
[0017]
In the invention according to claim 4, the second deodorizing filter (28) for adsorbing malodorous components in the air is disposed on the downstream side of the air of the inside / outside air switching door (14), and the all outside air deodorizing mode is set as the inside / outside air mode. Can be set, and the all-outside air deodorizing mode is set in the inside / outside air switching box (13) after passing through the first deodorizing filter (25) and the second deodorizing filter (28) from the outside air introduction port (18). When the outside air temperature detected by the outside air temperature sensor (44) is determined to be lower than the predetermined temperature corresponding to the cold time, the vehicle exterior odor sensor ( If it is determined that the outside air needs to be deodorized based on the detection signal detected by 45), the inside / outside air mode is set to the all outside air deodorizing mode, and if it is determined that the outside air does not need to be deodorized, the inside / outside air All modes outside It is characterized in that the mode.
[0018]
Thereby, when it is difficult to obtain the dehumidifying action by the refrigerant evaporator, if it is determined that it is necessary to deodorize the outside air, the inside / outside air mode is set to the all outside air deodorizing mode. For this reason, since outside air of low humidity compared with inside air is blown into the vehicle interior, both the anti-fogging property and the deodorization of outside air can be achieved.
On the other hand, if it is determined that there is no need to deodorize the outside air, the inside / outside air mode is set to the all outside air mode. For this reason, since external air of low humidity compared with inside air is blown into the vehicle interior without passing through the filter, it is possible to ensure both anti-fogging properties and increase air volume.
[0019]
Further, in the invention described in claim 5, the vehicle interior odor sensor (46) for detecting the odor component in the vehicle interior is provided, and the whole room air deodorization mode can be set as the inside / outside air mode. Only the flow of the inside air flowing from the inside air introduction port (19) to the outlet side of the inside / outside air switching box (13) after passing through the second deodorizing filter (28) is formed, and the whole inside air mode is set. When it is determined that it is necessary to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46) when the conditions are met, the inside / outside air mode is set to the all-inside air deodorizing mode and the all-inside air mode is set. When it is determined that it is not necessary to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46), the inside / outside air mode is set to the all inside air mode.
[0020]
Thereby, the mode which deodorizes internal air can be automatically set based on the detection signal of a vehicle interior odor sensor (46).
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.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
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.
[0033]
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.
[0034]
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. 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.
[0035]
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.
[0036]
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.
[0037]
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.
[0038]
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.
[0039]
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.
[0040]
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.
[0041]
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.
[0042]
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).
[0043]
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.
[0044]
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.
[0045]
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.
[0046]
[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.
[0047]
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.
[0048]
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.
[0049]
[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.
[0050]
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.
[0051]
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.
[0052]
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.
[0053]
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 outside air mode is selected, it is determined in the next step 170c whether or not the outside air temperature detected by the outside air temperature sensor 44 has decreased below a set value (0 ° C. in this example). Here, the outside air temperature setting value in step 170d is set to a temperature at which the compressor (not shown) that circulates the refrigerant in the refrigerant evaporator 40a is forcibly stopped. It is a determination of whether the temperature is in the compressor stop region.
[0054]
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 equal to or lower than the set value in step 170c, the all outside air mode or the all outside air deodorizing mode in which the inside air is not blown into the vehicle interior is set. This is determined depending on the determination result in step 170d. That is, in step 170d, it is determined whether deodorization is necessary. That is, the detection value (VDGS) of the odor sensor 45 outside the passenger compartment is compared with a preset value, and it is determined that deodorization is necessary when the sensor detection value exceeds the preset value, such as during traffic in a city. Then, the process proceeds to the next step 170e.
[0055]
In the next step 170e, the entire outside air deodorizing mode for deodorizing outside air is performed. This all-outside air deodorization mode is a mode in which only the flow of outside air that flows from the outside air inlet 18 to the outlet side of the inside / outside air switching box 13 after passing through the first deodorizing filter 25 and the second deodorizing filter 28 is formed.
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.
[0056]
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.
[0057]
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.
[0058]
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.
[0059]
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.
[0060]
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 located at the front position of the outside air inlet 18. Because it faces each other, open 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.
[0061]
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.
[0062]
On the other hand, when it is determined in step 170d 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 170f. The all outside air mode is a mode in which only the flow of outside air flowing from the outside air introduction port 18 to the outlet side of the inside / outside air switching box 13 is formed.
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.
[0063]
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.
[0064]
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.
[0065]
Next, in the flowchart of FIG. 5, when the outside air temperature is higher than the set value in the determination in step 170c, the process proceeds to step 170g, and the inside / outside air mode is determined according to the detection value (VDGS) of the outside odor sensor 45. . The inside / outside air mode in step 170g is determined from the map of FIG. That is, as the degree of odor of the outside air (in the figure, the exhaust gas odor concentration, the detected value (VDGS)) increases, the whole outside air mode shown in FIG. 2, the partially outside air mixed inside air mode shown in FIG. 8, and FIG. The inside / outside air mode is set in the order of all the inside air modes, and the lower the odor degree, the more the inside air mode shown in FIG. 9, the partially outside air mixed inside air mode shown in FIG. 8, and the all outside air mode shown in FIG. Set.
[0066]
That is, if it is determined that it is not necessary to deodorize the outside air based on the detected value (VDGS), the inside / outside air mode is set to the all outside air mode at step 170h. On the other hand, if it is determined that it is necessary to deodorize the outside air based on the detection value of the outside odor sensor 45 and the odor of the outside air is not so bad, the inside / outside air mode is changed to the partially outside air mixed inside air mode at step 170i. And On the other hand, if it is determined that the outside air needs to be deodorized, the inside / outside air mode is set in the order of the partially outside air mixed inside air mode at step 170i and the all inside air mode at step 170j as the outside air smell increases. To do.
[0067]
FIG. 8 shows the partially mixed outside air mode in step 170i. This partially mixed outside air mode includes 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 / outside air switching box 13 after passing through the first deodorizing filter 25 from the outside air introduction port 18. This is a mode in which a flow of outside air flowing to the outlet side is formed.
[0068]
In the partially mixed outside air mode, as shown in FIG. 8, the rotary door 14 and the filter holding member 15 are integrated (with the filter holding member 15 accommodated in the rotary door 14), as shown in FIG. 2. It is operated to an intermediate opening position rotated to the left by a predetermined angle from the position.
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 abuts on 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.
[0069]
In the inside air mode shown in FIG. 8 where the outside air is mixed (the outside air is deodorized), the inside air mode is basically used, 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.
[0070]
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.
[0071]
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.
[0072]
Thereby, in the partially outside air mixed inside air mode, outside air can be mixed into the inside air and introduced into the vehicle interior, thereby achieving vehicle interior ventilation by introduction of the outside air. Moreover, since the outside air from the outside air inlet 18 can be deodorized by passing through the first 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 first 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 flow path on the inside air inlet 19 side where pressure loss is small. Even if the deodorizing filter 25 has a high pressure loss, the reduction of the total introduced air volume can be suppressed to a small extent.
[0073]
As a result, it is possible to achieve both 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.
By the way, in the partially outside air mixed inside air mode, since it is a mode in which outside air is partially mixed in the inside air, compared to the all inside air mode described later, vehicle interior ventilation can be performed by partially mixing outside air. Car interior 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.
[0074]
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.
[0075]
In step S170j, a normal all-air mode is set. The all inside air mode is a mode in which only the flow of the inside air that flows directly from the inside air introduction port 19 to the outlet side of the inside / outside air switching box 13 is formed.
In this all-in-air mode, as shown in FIG. 10, 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.
[0076]
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.
[0077]
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.
[0078]
In this way, in this example, when the outside air is very dirty and the odor is quite smelly, the inside / outside air mode is set to the all inside air mode, so that the odor of the outside air can be prevented from completely entering the vehicle interior.
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 170m.
[0079]
In this step 170m, in addition to the whole room air mode, the whole room air + deodorization mode for deodorizing the room air is set. This all-in-air deodorization mode is a mode in which only the flow of the inside air that flows from the inside air introduction port 19 to the outlet side of the inside / outside air switching box 13 after passing through the second deodorizing filter 28 is formed.
The mode of step 170m will be described with reference to FIG. 9. The rotary door 14 in the inside / outside air switching device 11 is rotated to the leftmost position in FIG. 9, 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.
[0080]
On the other hand, the filter holding member 15 is rotated to the rightmost position in FIG. 9 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.
[0081]
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.
[0082]
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.
The inside / outside air suction mode of the first embodiment is summarized as follows: (1) All outside air + deodorization mode of FIG. 6, (2) Inside air mode of partial outside air mixing (outside air is deodorization) of FIG. A total of five outside / inside air modes, that is, the normal all outside air mode shown in FIG. 2, (4) the whole inside air + deodorization mode shown in FIG. 9, and (5) the normal all inside air mode shown in FIG. 10 can be set.
[0083]
(Second Embodiment)
This example is different in processing after the determination result in step 170c is NO in the flowchart of FIG. 5 of the first embodiment. FIG. 10 shows the processing contents of this example.
First, in step 170o, the environmental pollution degree Sgn is calculated from the following Equation 3 as the environmental condition determination.
[0084]
[Equation 3]
Sgn = (a × Sgn−1 + Vgs × (a−1)) / a
However, Sgn-1 is the previous environmental pollution degree and a is the integration time. Formula 3 is a general first-order lag formula, and an area in which the vehicle traveling environment of the own vehicle is contaminated by performing signal processing with a certain delay with respect to the detection value Vgs of the vehicle exterior odor sensor 45. (For example, an intersection) or a clean area (for example, a suburb) can be determined.
[0085]
Next, in step 170p, it is determined based on the environmental pollution degree Sgn whether or not the vehicle traveling environment is a contaminated area. Specifically, it is determined from the map shown in FIG. 12, and when the environmental pollution degree Sgn is smaller than a predetermined value, it is determined as a contaminated area, and when the environmental pollution degree Sgn is larger than a predetermined value, it is determined as a clean area. The Vgs (voltage value) is configured to be smaller as the concentration of the odor component of the outside air is larger. Further, when the degree of environmental pollution Sgn is calculated using Equation 1, the degree of environmental pollution Sgn changes as shown in FIG.
[0086]
If it is determined in step 170p that the area is a contaminated area, the process proceeds to step 170q. In step 170q, it is determined whether or not deodorization of outside air is necessary. Here, since the determination content of step 170q is the same as that of step 170d, description thereof is omitted here.
If it is determined in step 170q that the outside air needs to be deodorized, the process proceeds to step 170r, and the inside / outside air mode is set to the all-inside air mode shown in FIG. As a result, when it is a contaminated area, if the outside air is deodorized, the inside / outside air mode is changed to the all inside air mode, so that it is possible to completely reduce the smell of the outside air from entering the vehicle interior.
[0087]
On the other hand, if it is determined in step 170q that external air deodorization is not necessary, the process proceeds to step 170s. In step 170s, the inside / outside air mode is set to the partially outside air mixed inside air mode shown in FIG.
If it is determined in step 170p that the area is a clean area, it is determined in step 170t whether or not deodorization of the outside air is necessary. The contents of determination in step 170t are the same as in step 170d. If it is determined that deodorization of the outside air is necessary, the process proceeds to step 170u, and the inside / outside air mode is set to the partially outside air mixed inside air mode shown in FIG. On the other hand, if it is determined in step 170t that it is not necessary to deodorize the outside air, the process proceeds to step 170v, and the inside / outside air mode is set to the all outside air mode shown in FIG.
[0088]
That is, when it is determined that it is a contaminated area, if it is determined that it is necessary to deodorize the outside air, the inside / outside air mode is set to the all-inside air mode, and it is determined that it is not necessary to deodorize the outside air. An inside / outside air process is performed in which the inside / outside air mode is partly mixed with outside air. On the other hand, if it is determined that it is not a contaminated area but a clean area, and it is determined that the outside air needs to be deodorized, the inside / outside air mode needs to be partially mixed with the outside air and the outside air needs to be deodorized. If it is determined that there is no inside / outside air processing, the inside / outside air mode is changed to the all outside air mode.
[0089]
That is, for example, in a town where there is a lot of traffic and the outside air is dirty on average, in this example, the inside / outside air mode is switched between a partially outside air mixed inside air mode and a whole inside air mode. For this reason, compared with the case where the inside / outside air mode is switched between the partially outside air mixed inside air mode and the all outside air mode as in the prior application device, it is possible to prevent the odor from entering the vehicle interior. As a result, the intrusion of the odor caused by the local environment into the vehicle interior can be reduced.
[0090]
Furthermore, in a contaminated area, even if outside air deodorization is not necessary, the inside / outside air mode is partially mixed with outside air, so even if there is a delay in the response of the sensor 45, the vehicle interior ventilation function and outside air deodorization by the introduction of outside air The function can be ensured reliably, and further the reduction in the air volume of the air conditioner due to the high pressure loss of the filter can be avoided.
On the other hand, for example, in the suburbs where the outside air is relatively clean, since the switching between the inside and outside air modes is less than in the town, the frequency of outside air containing odors entering the vehicle interior is low. For this reason, in this example, since the inside / outside air mode is switched between the partially outside air mixed inside air mode and the all outside air mode, the vehicle interior can be ventilated quickly and in a short time.
[0091]
(Other embodiments)
In the first and second embodiments, 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 28 are provided. If a dust filter is disposed on the upstream side of the air flow, 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 first and second. Since it passes through the deodorizing filters 25, 28, it is possible to prevent dust from adhering to the first and second deodorizing filters 25, 28 and to extend the life of the first and second deodorizing filters 25, 28. it can.
[0092]
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.
In the first and second embodiments described above, the three cases 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, respectively. For example, the servo motor 49 of the auxiliary inside air door 21 can be eliminated, and the auxiliary inside 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.
[0093]
In the first and second embodiments, the rotary door (inside / outside air switching door) 14 and the filter holding member 15 are both configured as rotating members that perform a rotating operation around the rotation center 16. Instead of the circumferential wall surface 17 of the inside / outside air switching box 13, 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. A flat plate-like inside / outside air switching door 14 slidable (slidable) along a flat wall surface is installed inside, and a flat plate-like filter slidable further inside (air downstream side) of the inside / outside air switching door 14. The holding member 15 may be installed.
[0094]
In the second embodiment, the environmentally polluted area is determined based on the environmental pollution degree Sgn. However, the map information such as car navigation is used to recognize the industrial zone and switch the inside / outside air mode. Also good.
The present invention is also applicable to the inside / outside air switching device 11 that does not have the auxiliary inside air inlet 20 and the auxiliary inside air door 21.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing first and second embodiments 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 according to the first and second embodiments, showing a sectional shape in the vehicle longitudinal direction.
FIG. 3 is an electric control block diagram of the first and second embodiments.
FIG. 4 is a flowchart of electric control according to the first and second embodiments.
5 is a detailed flowchart of a main part of the electric control of FIG. 4 in the first embodiment.
FIG. 6 is a longitudinal sectional view showing a normal total outside air + deodorization mode according to the first and second embodiments, and shows a cross-sectional shape in the longitudinal direction of the vehicle.
FIG. 7 is a map showing the relationship between the exhaust gas concentration and the inside / outside air mode.
FIG. 8 is a longitudinal sectional view showing a partially outside air mixed inside air mode according to the first and second embodiments, and shows a sectional shape in the vehicle longitudinal direction.
FIG. 9 is a longitudinal sectional view showing the whole inside air + deodorizing mode of the first and second embodiments, and shows a sectional shape in the vehicle longitudinal direction.
FIG. 10 is a longitudinal sectional view showing a normal all-air mode of the first and second embodiments, and shows a sectional shape in the vehicle longitudinal direction.
FIG. 11 is a detailed flowchart of a main part of the electric control of FIG. 4 in the second embodiment.
FIG. 12 is a map showing determination contents of an environmental pollution degree Sgn and an environmental area in the second embodiment.
FIG. 13 is an explanatory diagram showing changes in the degree of environmental pollution Sgn in the second embodiment.
[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 (5)

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) disposed displaceably in the inside / outside air switching box (13),
The inside / outside air switching door (14) opens and closes the outside air introduction port (18) and the inside air introduction port (19),
A first deodorizing filter (25) that adsorbs malodorous components in the air is disposed on the air downstream side of the inside / outside air switching door (14),
A vehicle exterior odor sensor (45) for detecting odor components outside the vehicle compartment;
Inside / outside air processing (170g-170j) in which any one of the outside air mixed inside air mode, the all inside air mode, and the all outside air mode is switched as the inside / outside air mode based on the detection signal detected by the outside odor sensor (45). Is supposed to do
The partially mixed outside air mode includes a flow of inside air that flows directly from the inside air introduction port (19) to an outlet side of the inside / outside air switching box (13), and a first deodorizing filter (from the outside air introduction port (18)). 25) and the flow of outside air flowing to the outlet side of the inside / outside air switching box (13) after passing through 25),
In the all inside air mode, only 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) is formed.
In the all outside air mode, only the flow of outside air flowing from the outside air introduction port (18) to the outlet side of the inside / outside air switching box (13) is formed,
When it is determined that there is no need to deodorize the outside air based on the detection signal detected by the vehicle exterior odor sensor (45), the inside / outside air mode is set to the all outside air mode,
When it is determined that it is necessary to deodorize the outside air based on the detection signal detected by the vehicle exterior odor sensor (45), the larger the odor detected by the vehicle exterior odor sensor (45), The inside / outside air mode is set in the order of the outside air mixed inside air mode and the all inside air mode, and as the odor detected by the outside odor sensor (45) decreases, A vehicle air conditioner characterized by setting a mode. 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) disposed displaceably in the inside / outside air switching box (13),
The inside / outside air switching door (14) 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 disposed on the air downstream side of the inside / outside air switching door (14),
A vehicle exterior odor sensor (45) for detecting odor components outside the vehicle compartment;
Based on the detection signal detected by the vehicle exterior odor sensor (45), one of the outside air mixed inside air mode, the all inside air mode, and the all outside air mode is switched and set as the inside / outside air mode,
The partially mixed outside air mode includes the flow of inside air that flows directly from the inside air inlet (19) to the outlet side of the inside / outside air switching box (13), and the deodorizing filter (25) from the outside air inlet (18). And the flow of outside air flowing to the outlet side of the inside / outside air switching box (13) after passing through
In the all inside air mode, only 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) is formed.
In the all outside air mode, only the flow of outside air flowing from the outside air introduction port (18) to the outlet side of the inside / outside air switching box (13) is formed,
Determination means (170p) for determining whether the area where the vehicle is present is a contaminated area,
When it is determined by the determination means (170p) that the contaminated area is present, it is determined that it is necessary to deodorize the outside air based on a detection signal detected by the outside odor sensor (45). When it is determined that the inside / outside air mode is the all inside air mode and it is not necessary to deodorize the outside air, the inside / outside air processing (170q to 170s) is performed with the inside / outside air mode being the partial outside air mixing mode,
When it is determined by the determination means (170p) that it is not the contaminated area, it is determined that it is necessary to deodorize the outside air based on the detection signal detected by the outside odor sensor (45). When it is determined that the inside / outside air mode is the partial outside air mixing mode and it is not necessary to deodorize the outside air, the inside / outside air processing (170t to 170v) is performed to set the inside / outside air mode to the all outside air mode. A vehicle air conditioner. An outside air temperature sensor (44) for detecting outside air temperature, and when it is determined that the outside air temperature is equal to or higher than a predetermined temperature corresponding to a cold time based on a detection signal of the outside air temperature sensor (44), The vehicle air conditioner according to claim 1 or 2, wherein an air treatment (170g to 170j, 170t to 170v) is performed. A second deodorizing filter (28) that adsorbs malodorous components in the air is disposed on the air downstream side of the inside / outside air switching door (14),
All outside air deodorization mode can be set as the inside / outside air mode,
The all-outside air deodorization mode is a mode in which the outside air flowing from the outside air inlet (18) to the outlet side of the inside / outside air switching box (13) after passing through the first deodorizing filter (25) and the second deodorizing filter (28). Only the flow is formed,
When it is determined that the outside air temperature detected by the outside air temperature sensor (44) is lower than a predetermined temperature corresponding to cold, it is necessary to deodorize the outside air based on the detection signal detected by the outside odor sensor (45). The inside / outside air mode is set as the all-outside air deodorizing mode when it is determined that there is, and the inside / outside air mode is set as the all-outside air mode when it is determined that there is no need to deodorize outside air. Item 4. The vehicle air conditioner according to Item 3. A vehicle interior odor sensor (46) for detecting odor components in the vehicle interior;
The whole inside air deodorization mode can be set as the inside / outside air mode,
In the all inside air deodorization mode, only the flow of the inside air flowing from the inside air introduction port (19) to the outlet side of the inside / outside air switching box (13) after passing through the second deodorizing filter (28) is formed. And
When it is determined that it is necessary to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46) when the condition is set to the all inside air mode, the inside / outside air mode is changed to the all inside air deodorizing mode. age,
When it is determined that it is not necessary to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46) when the condition is set to the all inside air mode, the inside / outside air mode is referred to as the all inside air mode. The vehicular air conditioner according to claim 4.

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