JPH11180131A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the ventilation inside the cabin by introducing the outside air and deodorization of the outside air, and to prevent the reduction of air flow rate of the air conditioner due to the high pressure loss at the deodorization filter, furthermore to totally prevent the odor of the outside air from entering the cabin. SOLUTION: When it is determined that deodorization of the outside air is unnecessary (step 170d), the full outside air mode is selected as the inside/ outside air mode, while when it is determined that deodorization of the outside air is necessary, the inside/outside air mode is set according to the vehicle outside odor detected by the odor sensor. The inside air with part outside air mode (step 170i) is selected first. Then, as the odor increases, the full inside air mode (step 170j) is selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art The present applicant has previously filed an application for Japanese Patent Application No. 9-297520 as a vehicle air conditioner. In the prior application, the purpose of the vehicle air conditioner is to achieve both the securing of the vehicle interior ventilation function and the outside air deodorization function by introducing outside air, and the avoidance of a decrease in the air volume of the air conditioner due to the high pressure loss of the deodorization filter. In order to achieve this object, it is possible to set a partially outside air mixed inside air mode as the inside and outside air mode.

[0003] In the partial outside air mixing inside air mode, as shown in FIG. 8, a circumferential wall 14a of a rotary type inside / outside air switching door 14 opens both the outside air inlet 18 and the inside air inlet 19 at an intermediate opening. When displaced to the intermediate opening position, after the inside air flows directly from the inside air inlet 19 to the outlet side of the inside / outside air switching box 13 and after passing through the first deodorizing filter 25 through the gap 24 from the outside air inlet 18. A flow of the outside air flowing to the outlet side of the inside / outside air switching box 13 is formed.

Further, in the above-mentioned prior application, a total of five modes can be switched as the inside / outside air mode, and in addition to the partially outside air mixed inside air mode, a whole outside air + deodorizing mode can be set as one of the modes. It has become. In the total outside air + deodorizing mode, as shown in FIG. 6, by passing all outside air from the outside air inlet 18 through the second deodorizing filter 28,
Prevents the odor of diesel exhaust gas from the vehicle ahead from flowing into the passenger compartment.

In the above-mentioned prior application, a vehicle exterior odor sensor 45 (see FIG. 3) for detecting an odor component outside the vehicle compartment is arranged. When there is an odor, one of the partial outside air mixed inside air mode and the total outside air + deodorizing mode is used. Specifically, when the outside air temperature is lower than the predetermined temperature and the vehicle window glass is easily fogged, the above-mentioned partial outside air is mixed when the outside air temperature is higher than the predetermined temperature and the vehicle window glass is hardly fogged. Set to the shy mode. On the other hand, when the detection signal of the vehicle exterior odor sensor 45 is smaller than the set value and the external air has no odor, the normal external air that blows the external air into the vehicle interior without substantially removing the external odor as shown in FIG. Mode.

[0006]

However, in the above-mentioned prior application, when it is judged by the odor sensor outside the vehicle compartment that there is an odor, the partial outside air mixed inside air mode and the total outside air +
The use of one of the deodorizing modes is selected, but when the outside air is very dirty and the odor is quite odorous, the first deodorizing filter cannot completely absorb the odor, and the odor enters the passenger compartment. There is.

Accordingly, a first object of the present invention is to achieve both a function of ensuring a ventilation function in a vehicle compartment and a function of deodorizing outside air by introducing outside air, and a reduction in air volume of an air conditioner due to a high pressure loss of a deodorizing filter. It is an object of the present invention to provide an air conditioner for a vehicle that can prevent the odor of the vehicle from completely entering the vehicle interior. Further, the above-mentioned prior application has the following problems. As described above, when there is an odor in the outside air, one of the above-mentioned partial outside air mixed inside air mode and the above-mentioned all outside air + deodorization mode is used, and when there is no odor in the outside air, the above-mentioned whole outside air mode is used. For this reason, for example, in a town where the traffic volume is large and the outside air is dirty on average, when the vehicle is stopped ahead at an intersection or the like, the exhaust gas of the preceding vehicle causes the partial outside air mixed inside air mode and the full When one of the outside air and the deodorizing mode is used and the vehicle in front is separated from the own vehicle, an operation such as switching to the all outside air mode frequently occurs.

Thus, in a town where the outside air is dirty on average, if such switching of the inside / outside air mode occurs frequently, an operation delay due to the responsiveness of the inside / outside air switching door,
There is a problem in that the frequency of the odor-containing outside air entering the vehicle interior during switching between the inside and outside air modes increases. On the other hand, for example, in a suburb 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 the outside air containing the odor entering the vehicle interior is small, so the ventilation in the vehicle interior is quickly performed. I want to.

Accordingly, a second object of the present invention is to provide a vehicle interior ventilation function and an outside air deodorizing function by introducing outside air, and to avoid a decrease in air volume of an air conditioner due to a high pressure loss of a deodorizing filter. Another object of the present invention is to reduce the intrusion of odors caused by the environment into the cabin.

[0010]

In order to achieve the first object, according to the first aspect of the present invention, it is necessary to deodorize outside air based on a detection signal detected by a vehicle exterior odor sensor (45). If it is determined that there is no outside air mode, the inside / outside air mode is set to the all outside air mode, and if it is determined that the outside air needs to be deodorized based on the detection signal detected by the outside air odor sensor (45), the outside air sensor is used. As the odor detected by (45) increases, the inside / outside air mode is set in the order of the partly outside air mixed inside air mode and the whole inside air mode, and the vehicle interior / outside odor sensor (4)
5) The smaller the odor detected, the more the inside air mode,
It is characterized in that the inside / outside air mode is set in the order of the partly outside air mixed inside air mode.

[0011] According to this, in the partial outside air mixing mode, outside air can be mixed into the inside air and introduced into the vehicle interior, and ventilation of the vehicle interior by introduction of the external air can be achieved. In addition, 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 passing through the deodorizing filter is a part of the total amount of introduced air and is a small amount of air, and most of the introduced amount of air passes through the inside air inlet side flow passage having a small pressure loss. Even if there is, it is possible to slightly suppress the decrease in the total introduced air volume.

In addition to the above, according to the present invention, as the odor detected by the odor sensor outside the cabin increases, the inside / outside air mode is set in the order of a partly outside air mixed inside air mode and a whole inside air mode, so that the outside air is very dirty. If the odor is quite odorous, the inside / outside air mode becomes the full inside air mode. Therefore, it is possible to prevent the odor of the outside air from completely entering the vehicle interior.

Further, in order to achieve the second object,
According to the second aspect of the present invention, there is provided a judging means (170p) for judging whether or not the area where the vehicle is present is a contaminated area. When it is determined that the outside air needs to be deodorized based on the detection signal detected by the vehicle interior / outside odor sensor (45), the inside / outside air mode is set to the whole inside air mode, and it is determined that there is no need to perform the outside air deodorization. And the inside / outside air processing (170q-170) for setting the inside / outside air mode to the partial outside air mixing mode.
s), and when the determination means (170p) determines that the area is not a contaminated area, the odor sensor (45)
If it is determined that the outside air needs to be deodorized based on the detection signal detected by the controller, the inside / outside air mode is partially set to the outside air mixed inside air mode, and if it is determined that the outside air need not be deodorized, the inside / outside air Inside / outside air processing (1)
70t to 170v).

As a result, similarly to the first aspect of the present invention, it is possible to prevent the odor and the like of the diesel exhaust gas from the front vehicle from flowing into the passenger compartment, and it is possible to slightly suppress the decrease in the total amount of introduced air. Furthermore, in the present invention, for example, in a polluted area where traffic volume is high and the outside air is dirty on average,
The inside / outside air mode is switched between the inside / outside air mixed mode and the whole inside air mode. For this reason, odor can be prevented from entering the vehicle interior as compared with the above-mentioned prior application. As a result, it is possible to reduce the intrusion of the odor caused by the local environment into the cabin.

Further, in a contaminated area, even when deodorization of the outside air is not required, the inside / outside air mode is partially set to the inside air mode in which the outside air is mixed. It is possible to reliably ensure the outside air deodorizing function, and to avoid a decrease in the air volume of the air conditioner due to a high pressure loss of the filter. On the other hand, for example, in a suburb where the outside air is relatively clean, since the switching between the inside and outside air modes is less than in a town, the frequency of the outside air containing the odor entering the vehicle interior is low. For this reason, in the present invention, since the inside / outside air mode is switched between the inside air mode with partial outside air and the whole outside air mode, the ventilation in the vehicle compartment can be performed quickly and in a short time.

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 based on a detection signal of the outside air temperature sensor (44), the predetermined outside air temperature corresponds to a cold time. When it is determined that the temperature is equal to or higher than the temperature, the inside / outside air processing (170 g to 170 j, 170 t to 170 v)
It is characterized by performing. By the way, in a vehicle air conditioner, the compressor of the refrigeration cycle for air conditioning is normally stopped at the time of low outside air temperature such as at the time of cold, and the dehumidifying action by the refrigerant evaporator cannot be obtained. When,
When the outside air temperature is low, the entire 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 fogging of the window glass due to the mixture of inside air (high humidity).

Further, in the invention according to the fourth aspect, a second deodorizing filter (28) for adsorbing malodorous components in the air is disposed downstream of the inside / outside air switching door (14) in the air, and the entire inside / outside air mode is set. An outside air deodorizing mode can be set. The total outside air deodorizing mode is set by the first deodorizing filter (25) and the second deodorizing filter (2) from the outside air inlet (18).
8) Only the flow of the outside air flowing to the outlet side of the inside / outside air switching box (13) after passing through is formed, and the outside air temperature detected by the outside air temperature sensor (44) is a predetermined value corresponding to the time of cold. If it is determined that the temperature is lower than the temperature, and if 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 inside and outside air mode is set to the total outside air deodorization mode, and the outside air is deodorized. When it is determined that there is no need to perform deodorization, the inside / outside air mode is set to the all outside air mode.

Accordingly, when it is determined that the dehumidifying action of the refrigerant evaporator cannot be obtained and the outside air needs to be deodorized, the inside / outside air mode is set to the total outside air deodorizing mode. For this reason, since the outside air having a lower humidity than the inside air is blown into the vehicle interior, it is possible to ensure both anti-fogging property and deodorization of the outside air.
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 the outside air having a lower humidity than the inside air is blown into the vehicle interior without the outside air passing through the filter, it is possible to secure both anti-fogging property and increase the air volume.

According to the fifth aspect of the present invention, there is provided a vehicle interior odor sensor (46) for detecting a odor component in the vehicle interior,
A whole inside air deodorization mode can be set as the inside / outside air mode. The whole inside air deodorization mode is an outlet side of the inside / outside air switching box (13) after passing through the second deodorizing filter (28) from the inside air inlet (19). 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 inside air mode, and only the inside air flow flowing to the inside air is formed. When it is determined that the inside / outside air mode is the whole inside air deodorizing mode and the condition is the whole inside air deodorizing mode, it is determined that there is no need to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46). In this case, the inside / outside air mode is set to the all inside air mode.

Thus, the mode for deodorizing inside air can be automatically set based on the detection signal of the vehicle interior odor sensor (46). In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 10 show a first embodiment and show a blower unit 10 in a vehicle air conditioner. The blower unit 10 is mounted on a front side of a passenger seat below an instrument panel installed in a front part of a vehicle interior.
1 and a blower 12 is disposed below the inside / outside air switching device 11. The two parts 11 and 12 are integrally connected to form a single unit.

The inside / outside air switching device 11 has an inside / outside air switching box 13 made of resin, and an arc-shaped circumferential wall surface 17 (see FIG. 2) is formed at an upper portion thereof. 17
Is a rotary door 14 and a filter holding member 1 to be described later.
5 is formed in an arc shape centered on the rotation center 16. An outside air introduction port 18 for introducing outside air is opened in a portion of the circumferential wall surface 17 on the front side of the vehicle, and inside air is introduced into a portion of the circumferential wall surface 17 on the vehicle rear side (occupant side). The inside air inlet 19 is open.

In the inside / outside air switching box 13, an auxiliary inside air inlet 20 having an opening area sufficiently smaller than the inside air inlet 19 is opened on a side wall on the vehicle front side. The auxiliary inside air inlet 20 is opened and closed by an auxiliary inside air door 21. The auxiliary inside air door 21 is a flat plate-shaped door that can rotate around a rotation shaft 21a. Next, the rotary door 14 and the filter holding member 15, which are essential parts of the present invention, will be described in detail. Both of them 14 and 15 are integrally formed of resin, and the rotary door 14 constitutes an inside / outside air switching door. And has an arc-shaped circumferential wall 14 a centered on the rotation center 16. This circumferential wall 14
“a” is arranged on the inner peripheral side of the circular arc-shaped circumferential wall surface 17 and is formed so as to have an area larger than the opening areas of the outside air inlet 18 and the inside air inlet 19. Therefore, the circumferential wall 14
The two inlets 18, 19 can be opened and closed by the rotation of a. In this example, the two inlets 18, 19 are formed by the circumferential wall 14a.
The opening and closing of the wall is configured.

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

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

A first deodorizing filter 25 is provided on the inner peripheral side of the circumferential wall 14a of the rotary door 14 with a gap 24 at a predetermined interval L interposed therebetween. This first deodorizing filter 2
Reference numeral 5 denotes an arc shape extending along the circumferential wall 14a as shown in FIG. 2, and is built in the rotary door 14 on the inner peripheral side of the circumferential wall 14a by the following support structure. That is, as shown in FIG. 2, at both ends in the circumferential direction of the circumferential wall 14a of the rotary door 14, support plates 14f and 14g hanging down on the inner circumferential side of the circumferential wall 14a are formed. This support plate 14f,
14g is a rectangular shape elongated in the axial direction of the rotary door 14, and by the support plates 14f and 14g,
The side plates 14b and 14d at both ends in the axial direction are integrally connected. The support plates 14f and 14g respectively have projecting pieces 14h and 14h for supporting the lower surface of the first deodorizing filter 25.
i is formed. The first deodorizing filter 2 is also provided on the side plates 14b and 14d at both ends in the axial direction of the rotary door 14.
5, projecting pieces 14j and 14k for supporting the lower surface are formed.

The first deodorizing filter 25 is provided with the protruding piece 1 described above.
By being mounted and supported on 4h to 14k, it is detachably built in the inner peripheral side of the circumferential wall 14a of the rotary door 14. In addition, 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 outside air from the outside air inlet 18 is supplied to the support plate 14f on the left side of FIG. Opening 1 for introduction into 24
4m is open.

A seal member 26 made of an elastic material such as rubber is fixed to the outer peripheral surface of the circumferential wall 14a by bonding or the like. The seal member 26 has a rectangular (rectangular) frame shape corresponding to the opening edges of the outside air inlet 18 and the inside air inlet 19. On the other hand, on the arcuate circumferential wall surface 17 of the inside / outside air switching box 13, a projecting rib 27 having a triangular cross section is integrally formed and protrudes inward along the opening edge of the outside air inlet 18 and the inside air inlet 19. Have been.

The projecting rib 27 and the sealing material 26
By pressing the outside air inlet 18 or the inside air inlet 19 with the arc-shaped circumferential wall surface 17 reliably,
It is possible to prevent problems such as mixing of inside air into the outside air and mixing of outside air into the inside air. Next, the filter holding member 15 is located on the inner peripheral side of the circumferential wall surface 17 of the rotary door 14.
It is configured to be able to be housed further inside the deodorizing filter 25 and has a second deodorizing filter 28 incorporated therein. However, since the filter holding member 15 does not perform the function of switching between the inside and outside air, it does not have a circumferential wall corresponding to the circumferential wall 14a.

At one end of the filter holding member 15 in the axial direction, a side plate 1 located on the inner peripheral side of the first deodorizing filter 25 is provided.
5a are formed. The side surface plate 15a has an arc shape that is suspended from the inner peripheral side of the first deodorizing filter 25 by a small dimension, and the arc side surface plate 15a has a cylindrical support shaft that protrudes outward in the axial direction. 15b is integrally formed. The support shaft 15b is loosely inserted into an arc-shaped bearing groove 29 formed in the sector side plate 14b of the rotary door 14, 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.

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

Next, the second with respect to the filter holding member 15
The supporting structure of the deodorizing filter 28 will be described. The supporting plates 14f, 14g of the rotary door 14 are provided on the outer peripheral side of both circumferential ends of the side plates 15a, 15c of the filter holding member 15.
Are formed on the inner peripheral side of the support plate 15e, 15f. These support plates 15e and 15f are used for holding the filter holding member 1.
5 has a rectangular shape elongated in the axial direction, and the support plates 15e, 15f allow the side plates 15 at both ends in the axial direction.
a and 15c are integrally connected.

The supporting plates 15e and 15f have projecting pieces 1 for supporting the lower surface of the second deodorizing filter 28, respectively.
5 g and 15 h are formed. The second side plates 15a and 15c at both ends in the axial direction of the filter holding member 15 also
Projecting pieces 15i, 1 supporting the lower surface of the deodorizing filter 28;
5j are formed. The second deodorizing filter 28 is detachably built in the filter holding member 15 by being placed and supported on the above-mentioned projecting pieces 15g to 15j.

The first and second deodorizing filters 25 and 28 are made of the same material, and are capable of removing malodor components in the outside air (for example, odor components of diesel exhaust gas such as acetaldehyde). A deodorant (activated carbon or the like) to be adsorbed is supported on a porous filter base material such as urethane foam with an appropriate binder. The filter area is increased by folding the porous filter substrate supporting the deodorant in a corrugated (corrugated) manner. Further, the periphery of the corrugated porous filter substrate is held by a frame made of resin or the like.

The first and second deodorizing filters 25 and 28 having such a configuration have a ventilation resistance (pressure loss) significantly larger than that of the dust removing filter 31 by supporting 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, the outlet side of the inside / outside air switching box 13. Placed in

At the outlet side of the inside / outside air switching box 13, a filter support wall 32 positioned axially inside the sector side plate 14 b of the rotary door 14 and an axial direction inside the sector side plate 15 c of the filter holding member 15. Filter support wall 3
3 is integrally formed. The dust filter 31 has a rectangular shape that can be inserted between the two filter support walls 32 and 33 and two side walls in the vehicle front-rear direction of the inside / outside air switching box 13. Projecting pieces 32a, 33a supporting the lower surface of the dust filter 31 on two side walls of the inside / outside air switching box 13 in the vehicle front-rear direction, respectively.
34 are formed.

Therefore, these projecting pieces 32a, 33a,
By mounting the dust filter 31 on the top 34, the dust filter 31 is rotated by the rotating shaft 14 c in the inside / outside air switching box 13,
It is detachably incorporated at a position near 15d (in other words, at the outlet side of the inside / outside air switching box 13 and immediately before a blower inlet 36 described later). The dust filter 31 is the inside / outside air switching box 13.
For removing dust from inside air or outside air introduced into the inside, for example, a filter medium such as filter paper or porous urethane foam is folded in a corrugated shape (corrugated shape) to increase the filter area. In addition, the periphery of the corrugated filter medium is held by a frame made of resin or the like.

Since the dust filter 31 can be 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 will be described.
The blower 12 is a centrifugal multi-blade blower and has a well-known scroll-shaped resin blower casing 35, and a bell mouth-shaped suction port 36 is opened in the upper central portion of the blower casing 35. doing. A centrifugal multi-blade fan (sirocco fan) 37 for blowing the intake air from the suction port 36 is arranged in the blowing casing 35.

Here, the fan 37 is arranged so that its rotation axis is oriented in the vertical direction of the vehicle, and the air blown by the fan 37 changes its direction by 90 ° when passing through the fan 37 and is blown outward in the radial direction. You. In this example, the casing 3
The air outlet portion (not shown) of No. 5 is set in the right direction of the vehicle in FIG. 1, and the blast air flows from this air outlet portion in the direction of arrow A in FIG.

A motor 38 for rotating and driving the fan 37 is disposed so as to penetrate through the bottom surface 35a of the blower casing 35, and a mounting flange 39 provided on the motor 38 is provided.
The motor 38 is connected to the bottom 3 of the blower casing 35
5a. The air inlet of the air conditioning unit 40 is connected to the air outlet of the blower casing 35.
As is well known, the 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 path 40d, an outlet mode switching door mechanism (not shown), a face, a defroster, various outlets for feet (not shown), and the like are provided.

FIG. 3 is an electric control block diagram in the first embodiment. The air-conditioning electronic control unit (ECU) 41 is constituted by a microcomputer or the like, and is provided in the blower unit 10 and the air-conditioning unit 40. Various air conditioners are controlled according to a preset program. The ECU 41 is supplied with power from a vehicle-mounted battery (not shown) when an ignition switch (not shown) of the vehicle engine is turned on.

The ECU 41 receives a sensor signal from a well-known sensor group 42 and an operation signal from an air-conditioning operation panel 43 installed on the instrument panel of the vehicle interior. Among the sensor group 42, the sensors related to the electric control of the first embodiment will be described. An outside air temperature sensor 44 for detecting the outside air temperature (outside air temperature), an odor component outside the vehicle compartment (a diesel exhaust gas odor outside the vehicle interior). And a vehicle interior odor sensor 46 for detecting a vehicle interior odor component (such as a tobacco odor component in the vehicle interior).

The various types of air conditioners controlled by the ECU 41 will be described only in relation to the electric control of the first embodiment. The servo motor 47 for controlling the amount of rotation of the rotary door 14 and the amount of rotation of the filter holding member 15 will be described. And a servo motor 49 for controlling the amount of rotation of the auxiliary inside air door 21. The output shafts of these servo motors 47 to 49 are respectively connected to the rotation shaft 14c of the rotary door 14, the rotation shaft 15d of the filter holding member 15, and the rotation shaft 21a of the auxiliary inside air door 21 via an appropriate link mechanism or the like. . That is, in this example, servomotors 47 to 49 as actuators are independently provided for the three rotating members 14, 15, 21 provided in the inside / outside air switching device 11, respectively.

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. In a state where the ignition switch is turned on and the power is supplied to the ECU 33, when an air-conditioning operation switch (not shown) of the air-conditioning operation panel 43 is turned on. , The control routine of FIG. 4 is started,
In step 100, each initialization and initial setting are performed. In the next step 110, the air conditioning operation panel 43 is set.
Enter the set temperature set with the temperature setting switch.

Then, in the next step 120, a signal obtained by A / D converting the value of the sensor group 42 is read. And
In the next step 130, the target outlet temperature (TAO) into the vehicle interior is calculated based on the following equation 1 stored in the ROM in advance.
Is calculated.

[0046]

## EQU1 ## TAO = Kset × Tset−Kr × Tr−Kam ×
Tam−Ks × Ts + C where Tset is the temperature set by the temperature setting switch,
Tr is the detection value of the inside air temperature sensor, and Tam is the outside air temperature sensor 44.
And Ts are the detection values of the solar radiation sensor. Kset, Kr, Kam, and Ks are gains, and C is a correction constant.

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

In this embodiment, the operation panel 4
By operating a defroster switch (not shown) provided on 3, the defroster mode is forcibly set. Then, in step 160, the target opening (SW) of the temperature control air mix door 40c in the air conditioning unit 40 is
It is calculated based on the following equation 2 stored in the ROM in advance.

[0049]

SW = ((TAO−Te) / (Tw−Te)) × 100 (%) where Te is a value detected by a post-evaporator temperature sensor for detecting the temperature of the air blown from the evaporator 40a, and Tw is This is a detection value of a water temperature sensor that detects the temperature of the hot water circulating in 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 cool air from the refrigerant evaporator 40a passes through the bypass 40d. Further, when it is calculated that SW ≧ 100 (%), the air mix door 40c transmits all of the cold air to the heater core 4c.
0b. Then, 0 (%) <SW
When calculated as <100 (%), the air mix door 40c is controlled to a position where the cool air flows through both the heater core 8 and the bypass passage 9.

At step 170, the inside / outside air suction mode by the inside / outside air switching device 11 is determined. The determination of the inside / outside air suction mode will be described later with reference to FIG. In the next step 180, the evaporator 4
ON of the compressor (not shown) of the refrigeration cycle including Oa
Off 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.

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

Next, the determination of the inside / outside air suction mode in step 170 will be described in detail with reference to FIG. First, in step 170a, the inside / outside air mode for control is temporarily determined based on a map stored in the ROM in advance. That is, the predetermined value X at which the target outlet temperature (TAO) into the vehicle compartment is in a very low temperature range.
In the following cases, the inside air mode is set, and when TAO> X,
The mode is the outside air mode.

Then, in the next step 170b, it is determined whether or not the inside / outside air mode in step 170a is the outside air mode. When it is determined that the mode is the outside air mode, it is determined in the next step 170c whether the outside air temperature detected by the outside air temperature sensor 44 has fallen below a set value (0 ° C. in this example). Here, the outside air temperature set value in step 170d is set to a temperature at which a compressor (not shown) that circulates refrigerant in the refrigerant evaporator 40a is forcibly stopped.
The determination in step 170c is for determining whether or not the outside air temperature is in the compressor stop region.

When the outside air temperature falls below the above set value, the cooling and dehumidifying action of the refrigerant evaporator 40a is kept stopped by stopping the compressor. Is dangerous because it is cloudy. Therefore, when the outside air temperature is equal to or less than the set value in step 170c, the whole outside air mode or the whole outside air deodorizing mode in which the inside air is not blown into the vehicle interior is set. This is determined based on the determination result in step 170d. That is, in step 170d, it is determined whether or not deodorization is necessary. That is, the detection value (VDGS) of the odor sensor 45 outside the vehicle compartment is compared with a preset set value, and when the sensor detected value exceeds the set value, such as during traffic congestion in an urban area, it is determined that deodorization is necessary. Then, the process proceeds to the next step 170e.

In the next step 170e, a total outside air deodorizing mode for deodorizing outside air is performed. The total outside air deodorizing mode is a mode in which only the flow of outside air flowing 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 from the outside air inlet 18 is formed. The mode of step 170e will be described with reference to FIG.
The rotary door 14 of the inside / outside air switching device 11 is turned by a servomotor 47, the filter holding member 15 is turned by a servomotor 48, and the auxiliary inside air door 21 is turned by a servomotor 49 to the position shown in FIG.

That is, the rotary door 14 is turned to the right in FIG. 6, and is at a position where the inside air inlet 19 is closed by the circumferential wall 14a and the outside air inlet 18 is fully opened. here,
Seal material 26 on the outer peripheral surface of circumferential wall 14a and inside / outside air switching box 1
The inside air introduction port 19 is airtightly closed by pressure-bonding the protruding rib 27 on the side of the circular arc-shaped circumferential wall surface 17 of 3 so as to reliably prevent the inside air from being mixed into the outside air.

On the other hand, the filter holding member 15 is rotated leftward 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 inlet 20 is fully closed. Since the filter holding member 15 is located on the inner peripheral side of the outside air inlet 18, the outside air inlet 1
Most B ₁ of the outside air B from 8 passes through the second deodorizing filter 28 that is provided on the filter retaining member 15, odorous components (diesel exhaust of the ambient air by the adsorbent carried in the second deodorizing filter 28 Gas odor etc.) is adsorbed. At the same time, dust in the outside air B ₁ is removed by the second deodorizing filter 28.

In the rotary door 14, the circumferential wall 1
The gap 24 formed between the inner peripheral side of the first deodorizing filter 25 and the outer peripheral surface of the first deodorizing filter 25 communicates with the outside air introduction port 18 through the opening 14m opened in the left support plate 14f. Part of the outside air (for example, about 20% of the total air volume) B ₂ from the port 18 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 and is deodorized, and at the same time, dust is removed.

The outside air that has passed through the two deodorizing filters 25 and 28 flows to the outlet side of the inside / outside air switching box 13, passes through the dust filter 31, and enters the blowing casing 35 through the suction port 36 of the blower 12. The air is blown by the blower fan 37. The blown air flows into the air conditioning unit 40 from the air outlet of the blower casing 35, passes through the evaporator 40a and the heater core 40b, and is temperature-adjusted and then blown out from the outlet to the vehicle interior to air-condition the vehicle interior. I do.

By the way, in the whole outdoor air deodorizing mode, the second
When the filter holding member 15 equipped with the deodorizing filter 28 is operated to a rotation position different from that of the rotary door 14, the second
Since the deodorizing filter 28 faces the front position of the outside air inlet 18, the second deodorizing filter 2 against the flow of the outside air B ₁
8 a front area becomes large, the outside air B ₁ is uniformly flows to the total area of the second deodorizing filter 28.

As a result, the malodorous component is relatively uniformly adsorbed on the entire area of the second deodorizing filter 28, so that the service life of the second deodorizing filter 28 can be extended and the deodorizing efficiency can be improved. Further, since the rotary door 14 is formed of a hard plate surface such as a resin, the suction noise of the outside air flow is reflected on the door plate surface and may leak into the vehicle interior. Since it is made of a material and a porous filter substrate supporting the material, it has much better sound absorption characteristics than the rotary door 14. Therefore, since the second deodorizing filter 28 faces the front position of the outside air inlet 18, the suction noise of the outside air flow is reduced.
8, good absorption and reduction can be achieved.

On the other hand, when it is determined in step 170d that deodorization is unnecessary (for example, when the vehicle is traveling in a low-contamination outdoor environment in a suburb), a normal all-outdoor 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 inlet 18 to the outlet side of the inside / outside air switching box 13 is formed. FIG. 2 illustrates this step 170.
g indicates the whole outside air mode, and the rotary door 14
The filter holding member 15 is integrally rotated to the rightmost position. Therefore, the inside air inlet 19 is fully closed by the circumferential wall 14a of the rotary door 14, and the outside air inlet 18 is fully opened. The auxiliary inside air door 21 completely closes the auxiliary inside air inlet 20.

Therefore, the introduction of the inside air from the inside air introduction ports 19 and 20 is completely shut off, and only the outside air B is introduced into the inside / outside air switching box 13 from the outside air introduction port 18. The most B ₁ of the outside air B from the outside air introduction port 18 advances towards the dust filter 31 as it is, the outside air B ₁ at dust removing filter 31
Dust is removed. The outside air B from the outside air inlet 18
Some B ₂ of are introduced into the gap 24 through the opening 14m. The outside air B ₂ from the gap 24 is deodorized by passing through the first, the second deodorizing filter 25 and 28 are simultaneously dust removal.

Thereafter, the outside air B ₂ joins with the outside air B ₁ and passes through the dust filter 31. And the outside air is blower 12
Of the air conditioning unit 40
The air is blown into the vehicle cabin after the temperature is adjusted in the vehicle. As described above, most of the outside air B ₁ from the outside air inlet 18 is in the first and second deodorizing filters 25 and 2 in the normal whole outside air mode.
8, the air directly goes to the dust removal filter 31, so that it is possible to suppress the occurrence of pressure loss due to the two deodorizing filters 25 and 28 having a large ventilation resistance, to increase the air volume in the full outside air mode, and to increase the air conditioning capacity. it can.

Next, in the flowchart of FIG. 5, when the outside air temperature is higher than the set value in the judgment of step 170c, the process proceeds to step 170g, and the inside / outside air mode is set according to the detection value (VDGS) of the vehicle outside odor sensor 45. To determine.
The inside / outside air mode in step 170g is determined from the map of FIG. That is, as the degree of the odor of the outside air (the detected value (VDGS) in the exhaust gas odor concentration in the figure) increases, the whole outside air mode shown in FIG. 2, the partially outside air mixed inside mode shown in FIG. The inside / outside air mode is set in the order of the whole inside air mode, and as the degree of the odor becomes smaller, FIG.
The inside / outside air mode is set in the order of the whole inside air mode shown in FIG. 8, the partially outside air mixed inside air mode shown in FIG. 8, and the whole outside air mode shown in FIG.

That is, based on the detected value (VDGS),
If it is determined that there is no need to deodorize the outside air, the inside / outside air mode is set to the above-mentioned all outside air mode in step 170h.
If it is determined that the outside air needs to be deodorized on the basis of the detection value of the vehicle outside odor sensor 45, and the odor of the outside air is not so odor, in step 170i, the inside / outside air mode is changed to the partial outside air mixed inside air mode. And On the other hand, when it is determined that it is necessary to deodorize the outside air, the inside / outside air mode is set in the order of the partial outside air mixed inside air mode in step 170i and the whole inside air mode in step 170j as the smell of the outside air increases. I do.

FIG. 8 shows the inside air mode in which part of the outside air is mixed in step 170i. In the partial outside air mixed inside air mode, the inside air flows directly from the inside air introduction port 19 to the outlet side of the inside / outside air switching box 13 and the first outside air flow from the outside air introduction port 18.
This is a mode in which the flow of outside air flowing to the outlet side of the inside / outside air switching box 13 after passing through the deodorizing filter 25 is formed.

In the inside air mode in which the outside air is partially mixed, the rotary door 14 and the filter holding member 15 are integrated as shown in FIG.
5 is housed), and is operated to the intermediate opening position rotated leftward by a predetermined angle from the position in FIG. Further, the auxiliary inside air door 21 opens the auxiliary inside air introduction port 20, and is pivotally operated to a position where the end thereof 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 length of the support plate 15e in the axial direction. The portion contacts the support plate 15e.

As shown in FIG. 8, some outside air is mixed (outside air is deodorized).
In the inside air mode, the inside air mode is basically used, and the outside air is partially (for example, 30% or less, more specifically, 15 %%) in the inside air.
Degree), the intermediate opening (rotation) position of the rotary door 14 and the filter holding member 15 is
Inside air inlet 19 formed by circumferential wall 14a of rotary door 14
Is a position where the opening area of the outside air introduction port 18 is small.

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 inlet 19 and the auxiliary inside air inlet 2
At the same time as the inside air C is introduced from 0, a small amount of outside air B is introduced from the outside air inlet 18. The small amount of outside air B flows into the opening 14m with the flat auxiliary inside air door 21 as a guide. Then, the outside air flows from the opening 14m via the gap 24 to the first deodorizing filter 25 in the rotary door 14.
And it passes through the second deodorizing filter 28 of the filter holding member 15 and is deodorized.

On the other hand, since the inside air C can secure a sufficiently large flow passage area by both the inside air inlet 19 and the auxiliary inside air inlet 20, it is easy to secure the required air volume by the inside air. Then, 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 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 into the vehicle interior.

Thus, in the inside air mode in which some outside air is mixed, outside air can be mixed into the inside air and introduced into the vehicle interior, and ventilation of the vehicle interior by introduction of the outside air can be achieved. In addition, 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 introduced air, is a small amount of air, and most of the amount of introduced air passes through the inside air inlet 19 side flow passage with a small pressure loss. Even if the deodorizing filter 25 has a high pressure loss, it is possible to slightly suppress the decrease in the total amount of introduced air.

As a result, it is possible to ensure both the function of ventilating the inside of the vehicle and the function of deodorizing the outside air by introducing the outside air, and to avoid the decrease in the air volume of the air conditioner due to the high pressure loss of the deodorizing filter. By the way, in the partial outside air mixed inside air mode,
Since the mode is a mode in which the outside air is partially mixed into the inside air, the interior of the vehicle can be ventilated by partially mixing the outside air, and an increase in the CO ₂ concentration in the interior of the vehicle can be suppressed, as compared with the all inside air mode described later. Therefore, during a steady operation after a transition period of heating and cooling has been started, even if this mode is continued for a long time, an increase in CO ₂ concentration does not occur, and this is effective as a suction mode in a steady state.

Further, since the ratio of the amount of internal air circulating in the blown air is large, the heat load of heating and cooling can be reduced, and the capacity is improved by increasing the temperature of the blown air during heating, and the compressor during cooling. The driving power can be reduced. Further, since the amount of outside air passing through the first and second deodorizing filters 25 and 28 is small, the first and second deodorizing filters 2 and
It is possible to reduce the outside air inflow speed into the first and second deodorizing filters 25 and 28, and to reduce the pressure loss in the first and second deodorizing filters 25 and 28.
Since the amount of air passing through the filter 28 is small, the first and second deodorizing filters 25 and 28 are also advantageous in terms of life.

In step S170j, a normal whole inside air mode is set. The all inside air mode is the inside air inlet 1
9 is a mode in which only the flow of the inside air flowing directly from 9 to the outlet side of the inside / outside air switching box 13 is formed. In the full inside air mode, as shown in FIG. 10, the rotary door 14 and the filter holding member 15 are integrally rotated and operated 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. The auxiliary inside air door 21 opens the auxiliary inside air inlet 20.

Therefore, the introduction of outside air from the outside air inlet 18 is completely shut off, 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 inlet 19 and the inside air C from the auxiliary inside air inlet 20 proceed toward the dust filter 31 as it is, and the dust of the inside air C is removed by the dust filter 31. The inside air that has passed through the dust filter 31 is blown by the blower fan 37 of the blower 12, and is blown into the vehicle compartment after the temperature is adjusted by the air conditioning unit 40.

As described above, in the normal whole inside air mode, the inside air C from the inside air inlet 19 and the auxiliary inside air inlet 20
Both pass directly to the dust removing filter 31 without passing through the first and second deodorizing filters 25 and 28, so that no pressure loss occurs due to both the deodorizing filters 25 and 28 having a large ventilation resistance, and in the all inside air mode. The air volume can be increased, and the air conditioning capacity can be increased.

As described above, in this example, when the outside air is very dirty and the odor is quite odorous, the inside / outside air mode is set to the whole inside air mode, so that the odor of the outside air is prevented from completely entering the vehicle interior. it can. Next, in step 170a, when the target outlet temperature (TAO) into the vehicle compartment becomes equal to or less 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 becomes NO. ,
At step 170h, it is determined whether or not 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 setting value, and when the sensor detection value exceeds the preset value, such as during vehicle interior smoking, it is determined that deodorization is necessary, and the next Proceed to step 170m.

In this step 170m, in addition to the whole inside air mode, a whole inside air + deodorizing mode for deodorizing inside air is set.
The whole inside air deodorizing mode is a mode in which only the flow of inside air flowing to the outlet side of the inside / outside air switching box 13 after passing through the second deodorizing filter 28 from the inside air inlet 19 is formed. The mode of step 170m will be described with reference to FIG.
The rotary door 14 in the inside / outside air switching device 11 is rotated to the leftmost position in FIG. 9 and is operated to a position where the outside air introduction port 18 is closed by the circumferential wall 14a and the inside air introduction port 19 is fully opened. Thus, the introduction of the outside air from the outside air inlet 18 is completely shut off.

On the other hand, the filter holding member 15 is turned to the rightmost position in FIG. 9 and is located on the inner peripheral side of the inside air inlet 19. The auxiliary inside air door 21 is rotated to a position where the auxiliary inside air inlet 20 is fully closed. Since the filter holding member 15 is located on the inner peripheral side of the inside air inlet 19, all the inside air C from the inside air inlet 18 passes through the second deodorizing filter 28 of the filter holding member 15. The odor components (tobacco odor, etc.) in the inside air are adsorbed by the adsorbent carried on the helmet. At the same time, dust in the inside air C is also removed by the second deodorizing filter 28.

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 filter 31, and the temperature of the inside air C is adjusted by the air conditioning unit 40. To air-condition the cabin. By the way, in the whole inside air + deodorizing mode, the filter holding member 15 equipped with the second deodorizing filter 28 is operated to a rotation position different from that of the rotary door 14, and the second deodorizing filter 28 is positioned in front of the inside air inlet 19. , The second deodorizing filter 2 for the flow of inside air C
8, the inside air C flows uniformly over the entire area of the second deodorizing filter 28.

Therefore, for the same reason as in the whole outside air + deodorizing mode of FIG. 6, the life of the second deodorizing filter 28 can be extended and the deodorizing efficiency can be improved, and the suction noise of the inside air flow can be reduced by the second deodorizing filter. At 28, it can be absorbed and reduced well. The inside / outside air suction mode of the first embodiment described above is summarized as follows: the whole outside air + deodorization mode in FIG. 6, the inside air mode in which some outside air is mixed (outside air is deodorized) in FIG. 7, and the normal whole outside air mode in FIG. 1 and the whole inside air + deodorizing mode of FIG. 9 and FIG.
Thus, a total of five inside / outside air modes can be set, including the normal normal inside air mode of 0.

(Second Embodiment) The present embodiment is different from the first embodiment in the processing after the determination result of step 170c is NO in the flowchart of FIG. FIG. 10 shows the processing contents of this example. First, Step 1
At 70o, the environmental pollution degree Sgn is calculated from Equation 3 below as the environmental condition determination.

[0084]

Sgn = (a × Sgn−1 + Vgs × (a−1)) / a where Sgn−1 is the previous environmental pollution degree and a is the integration time. Equation 3 is a general equation of a first-order delay, and performs signal processing with a certain delay with respect to the detection value Vgs of the outside-cabin odor sensor 45, so that the area in which the vehicle traveling environment of the own vehicle is polluted. (Eg, an intersection) or a clean area (eg, a suburb).

Next, in step 170p, it is determined based on the environmental pollution degree Sgn whether or not the vehicle traveling environment is a polluted area. Specifically, it is determined from the map shown in FIG. 12. When the degree of environmental pollution Sgn is smaller than a predetermined value, it is determined that the area is a contaminated area, and when the degree of environmental pollution Sgn is larger than a predetermined value, it is determined that the area is clean. The Vgs (voltage value) is configured to decrease as the concentration of the odor component in the outside air increases. Further, when the environmental pollution degree Sgn is calculated by the above mathematical formula 1, the environmental pollution degree Sgn changes as shown in FIG.

If it is determined in step 170p that the area is a contaminated area, the flow advances to step 170q to proceed to step 170q.
In q, it is determined whether or not deodorization of the outside air is necessary. Here, the content of the determination in step 170q is the same as that in step 170d, and a description thereof will be omitted. Step 1
If it is determined at 70q that the deodorization of the outside air is necessary, the process proceeds to step 170r, and the inside / outside air mode is set to the above-described state in FIG.
Is assumed to be the all inside air mode. Thus, in a polluted area, if there is deodorization of the outside air, the inside / outside air mode is set to the whole inside air mode, so that the smell of the outside air can be completely prevented from entering the vehicle interior.

On the other hand, if it is determined in step 170q that deodorization of the outside air is not necessary, the process proceeds to step 170s.
In step 170s, the inside / outside air mode is set to the above-mentioned partial outside air mixing inside air mode shown in FIG. If it is determined in step 170p that the area is clean, step 170t
It is determined whether or not deodorization of the outside air is necessary. The content of the determination in step 170t is the same as that in step 170d. Then, when it is determined that the 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. Step 17
If it is determined at 0t that deodorization of the outside air is not necessary, the process proceeds to step 170v, and the inside / outside air mode is set to the all outside air mode shown in FIG.

In other words, when it is determined that the area is a contaminated area, if it is determined that the outside air needs to be deodorized, it is determined that the inside / outside air mode is set to the whole inside air mode and the outside air does not need to be deodorized. Then, the inside / outside air processing is performed in which the inside / outside air mode is partially changed to the outside air mixed inside air mode. On the other hand, when it is determined that the area is not a contaminated area but a clean area, and it is determined that it is necessary to deodorize the outside air, it is necessary to set the inside / outside air mode to a partly outside air mixed inside mode and perform the deodorization of outside air. If it is determined that there is no inside / outside air mode, inside / outside air processing is performed to set the inside / outside air mode to the all outside air mode.

That is, for example, in a town where the traffic volume is large and the outside air is dirty on average, in this example, the inside / outside air mode is switched between the partially outside air mixed inside air mode and the whole inside air mode. Therefore, the odor can be prevented from entering the vehicle interior as compared with the case where the inside / outside air mode is switched between the partially outside air mixed inside air mode and the whole outside air mode as in the prior application. As a result, it is possible to reduce the intrusion of the odor caused by the local environment into the cabin.

Further, in a contaminated area, even when deodorization of the outside air is not necessary, the inside / outside air mode is partially set to the inside air mode in which the outside air is mixed. In addition, the deodorizing function of the outside air can be reliably ensured, and further, it is possible to avoid a decrease in the air volume of the air conditioner due to a high-pressure loss of the filter. On the other hand, for example, in a suburb where the outside air is relatively clean, since the switching between the inside and outside air modes is less than in a town, the frequency of the outside air containing the odor entering the vehicle interior is low. Therefore, in this example,
Since the inside and outside air mode is switched between the partially outside air mixed inside air mode and the whole outside air mode, it is possible to quickly and quickly ventilate the vehicle interior.

(Other Embodiments) In the first and second embodiments, the rotary door 14 is provided with the first deodorizing filter 25 and the filter holding member 15 is provided with the second deodorizing filter 28, respectively. If a dust filter is arranged on the upstream side of the air flow of the deodorizing filter 25 and the second deodorizing filter 28, and this dust filter is also configured to rotate integrally with the rotary door 14 and the filter holding member 15, the dust filter can remove dust. Since the air thus passed passes through the first and second deodorizing filters 25 and 28, it is possible to prevent dust from adhering to the first and second deodorizing filters 25 and 28 and prevent the first and second deodorizing filters 25 and 28 from being attached. 28 can be extended.

As described above, the first and second deodorizing filters 2
As the dust filter disposed on the upstream side of the air flow of 5, 28, a dust filter that captures finer particles than the dust filter 31 located on the outlet side of the inside / outside air switching box 13 is used. And the second deodorizing filters 25 and 28 are preferably prevented from adhering. In addition, the first and second
In the embodiment, the rotary door 14, the filter holding member 1
5 and the case where the three members of 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 is eliminated, and the auxiliary inside air door 21 is removed. 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 first and second embodiments, the rotary door (inside / outside air switching door) 14 and the filter holding member 15 are both configured as a rotating member that performs a rotating operation about the rotation center 16. However, the circumferential wall 17 of the inside / outside air switching box 13 has been eliminated, and the inside / outside air switching box 1 has been replaced.
3, a flat wall surface is formed, and the outside air inlet 18 is formed on the flat wall surface.
And an inside air inlet 19, and inside the flat wall surface,
A flat inside / outside air switching door 14 slidable (slidable) along a flat wall surface is provided, and a flat filter holding member 15 slidable further inside (downstream of air) of the inside / outside air switching door 14. May be installed.

In the second embodiment, the environmentally polluted area is determined based on the environmental pollution degree Sgn. However, an industrial zone or the like is recognized using map information such as car navigation, and the inside / outside air mode is switched. You may do it. Further, the present invention can be applied to the inside / outside air switching device 11 which does not have the auxiliary inside air introduction port 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, and shows a sectional shape in a vehicle left-right direction.

FIG. 2 is a longitudinal sectional view showing a normal all outside air mode of the first and second embodiments, and shows a sectional shape in a 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.

FIG. 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 + deodorizing mode of the first and second embodiments, and shows a sectional shape in a vehicle front-rear direction.

FIG. 7 is a map showing a 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 of the first and second embodiments, and shows a sectional shape in a vehicle front-rear direction.

FIG. 9 is a longitudinal sectional view showing a total inside air + deodorizing mode of the first and second embodiments, and shows a sectional shape in a vehicle front-rear direction.

FIG. 10 is a longitudinal sectional view showing a normal all inside air mode of the first and second embodiments, and shows a sectional shape in a 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 shows the environmental pollution degree Sgn in the second embodiment.
7 is a map showing the content of determination between the environment and the environmental area.

FIG. 13 shows the environmental pollution degree Sgn in the second embodiment.
It is explanatory drawing showing the change of.

[Explanation of symbols]

13: inside / outside air switching box, 14: inside / outside air switching rotary door, 14a: peripheral wall, 15: filter holding member, 18 ...
Outside air inlet, 19: inside air inlet, 20: auxiliary inside air inlet, 21: auxiliary inside air door, 25, 28 ... deodorizing filter.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuichi Kajino 1-1-1, Showa-cho, Kariya-shi, Aichi Pref.

Claims (5)

[Claims] An inside / outside air switching box (13) having an outside air introduction port (18) for introducing outside air and an inside air introduction port (19) for introducing inside air, and displaceable into the inside / outside air switching box (13). An internal / external air switching door (14) disposed therein, and the external air introduction port (1)
8) and the inside air inlet (19) is opened and closed, and a first deodorizing filter (25) that adsorbs malodorous components in the air is disposed downstream of the inside / outside air switching door (14). Vehicle odor sensor for detecting outdoor odor components (45)
An inside / outside air process (see FIG. 3) that switches among the inside / outside air mode, the whole inside air mode, and the whole outside air mode as an inside / outside air mode based on a detection signal detected by the vehicle interior / outside odor sensor (45). 170g to 170j), and the partial outside air mixed inside air mode is configured to perform the inside air introduction port (1
9) the inside air flowing directly to the outlet side of the inside / outside air switching box (13) and the first air from the outside air introduction port (18).
After passing through the deodorizing filter (25), a flow of the outside air flowing to the outlet side of the inside / outside air switching box (13) is formed, and the whole inside air mode is provided from the inside air introduction port (19). Only the flow of inside air flowing directly to the outlet side of the inside / outside air switching box (13) is formed. In the all outside air mode, the inside / outside air switching box (13) is provided from the outside air introduction port (18). Only the flow of the outside air flowing to the exit side of the vehicle is formed, and if it is determined that there is no need to perform the deodorization of the outside air based on the detection signal detected by the outside odor sensor (45),
When the inside / outside air mode is the all outside air mode, and it is determined that the outside air needs to be deodorized based on a detection signal detected by the vehicle interior / outside odor sensor (45),
As the odor detected by the outside odor sensor (45) increases, the inside / outside air mode is set in the order of the partially outside air mixed inside air mode and the whole inside air mode, and the odor detected by the outside odor sensor (45) is set. An air conditioner for a vehicle, wherein the smaller the size is, the more the inside air mode and the part outside air mixed inside air mode are set in this order. 2. An inside / outside air switching box (13) having an outside air introduction port (18) for introducing outside air and an inside air introduction port (19) for introducing inside air, and displaceable into the inside / outside air switching box (13). An internal / external air switching door (14) disposed therein, and the external air introduction port (1)
8) and the inside air inlet (19) are opened and closed, and a deodorizing filter (25) for adsorbing malodorous components in the air is arranged downstream of the inside / outside air switching door (14). Outside odor sensor for detecting odor components (45)
Any one of the inside air mode, the inside air mode, and the whole outside air mode is set as the inside air / outside air mode based on the detection signal detected by the vehicle exterior smell sensor (45). The partial outside air mixed inside air mode is the inside air introduction port (1
9), the flow of inside air flowing directly to the outlet side of the inside / outside air switching box (13), and the inside / outside air switching box (1) after passing through the deodorizing filter (25) from the outside air introduction port (18).
And a flow of outside air flowing to the outlet side of 3) is formed. In the all inside air mode, the inside air flowing directly from the inside air inlet (19) to the outlet side of the inside / outside air switching box (13) is provided. In the total outside air mode, only the flow of outside air flowing from the outside air inlet (18) to the outlet side of the inside / outside air switching box (13) is formed. And determining means (170p) for determining whether or not the area where the vehicle is located is a contaminated area. When the determining means (170p) determines that the area is the contaminated area, Outdoor odor sensor (45)
When it is determined that it is necessary to perform deodorization of the outside air based on the detection signal that is detected, the inside / outside air mode is set to the all inside air mode, and when it is determined that there is no need to perform deodorization of the outside air, the inside / outside air is determined. An inside / outside air process (170q to 170s) in which the mode is the partial outside air mixing mode is performed, and when the determination unit (170p) determines that the region is not the contaminated area, the vehicle room outside odor sensor (45)
When it is determined that it is necessary to deodorize the outside air based on the detection signal detected, the inside and outside air mode is set to the partial outside air mixing mode, and when it is determined that there is no need to perform the deodorization of the outside air, An air conditioner for a vehicle, which performs inside / outside air processing (170t to 170v) in which the inside / outside air mode is set to the all outside air mode. 3. An outside air temperature sensor for detecting an outside air temperature.
When it is determined based on the detection signal of the outside air temperature sensor (44) that the outside air temperature is equal to or higher than a predetermined temperature corresponding to the time of cold, the inside and outside air processing (170g to 170
3. The vehicle air conditioner according to claim 1, wherein j, 170t to 170v) are performed. 4. A second deodorizing filter (28) that adsorbs malodorous components in the air is disposed downstream of the inside / outside air switching door (14) in the air, and a whole outside air deodorizing mode can be set as the inside / outside air mode. In the total outside air deodorizing mode, the outlet of 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 inlet (18). Only the flow of outside air flowing to the outside is formed, and 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 a cold time, the outside air smell sensor ( 45) When it is determined that it is necessary to deodorize the outside air based on the detection signal detected, when the inside / outside air mode is set to the all outside air deodorization mode and it is determined that there is no need to perform the deodorization of the outside air, Inside The vehicle air conditioner according to claim 3, wherein the outside air mode is the all outside air mode. 5. An interior odor sensor (46) for detecting an odor component in the interior of the vehicle, wherein a whole interior air deodorization mode can be set as the inside / outside air mode. After passing through the second deodorizing filter (28) from the inlet (19), only the flow of inside air flowing to the outlet side of the inside / outside air switching box (13) is formed. If it is determined that it is 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 deodorization mode, When it is determined that there is no need to deodorize the inside air based on the detection signal of the vehicle interior odor sensor (46) in the condition for setting the mode, the inside / outside air mode is set to the all inside air mode. Claim 4, characterized in that
An air conditioner for a vehicle as described in the above.