JP2003080920A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent scattering of ash of tobacco by air conditioning wind blown off toward the occupant upper half body when smoking at face mode time and bi-level mode time. SOLUTION: When detecting the smoking at face mode and bi-level mode time, for example, the air conditioning wind is blown off from a part except for a face blowoff port 12 by being switched to either of a defroster mode, a foot mode, and a foot defroster mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, a face mode that blows conditioned air toward the upper body of a passenger, a foot mode that blows conditioned air toward the feet of the occupant, a defroster mode that blows conditioned air toward the window glass of a vehicle, and an upper body of the occupant. BACKGROUND ART There is known a vehicle air conditioner capable of automatically switching between a bi-level mode in which conditioned air is blown toward a passenger's feet and a foot defroster mode in which conditioned air is blown toward a passenger's feet and vehicle window glass.

[0003]

However, when smoking in the face mode and the bi-level mode,
There was a problem in that the ash of the cigarette was scattered by the air-conditioning air blown toward the upper body of the occupant, which made the occupant uncomfortable.

The present invention has been made in view of the above points, and it is an object of the present invention to prevent the scattering of tobacco ash during smoking.

[0005]

In order to achieve the above object, the invention according to claim 1 detects a face outlet (12) for blowing conditioned air to the upper body side of a passenger in a passenger compartment and smoking of the passenger. Detecting means (39) and detecting means (39)
Face outlet (12) when smoking is detected by
And a control means (6) for reducing the amount of conditioned air blown out of the room.

According to this, since the amount of conditioned air blown toward the upper body of the occupant during smoking is reduced, it is possible to prevent the ash of tobacco from being scattered during smoking.

According to the second aspect of the invention, in the vehicle air conditioner capable of automatically changing the blowing direction of the conditioned air, the detecting means (39) for detecting smoking of the occupant and the detecting means (3).
When smoking is detected by 9), a control means (6) for changing the blowing direction of the conditioned air to a site other than the upper half of the occupant's upper body is provided.

According to this, since the blowing direction of the conditioned air is changed to a portion other than the upper body of the occupant during smoking, it is possible to prevent the ash of the cigarette from scattering during smoking.

According to the third aspect of the present invention, in the vehicle air conditioner for blowing out air-conditioned air into the passenger compartment, detecting means (39) for detecting smoking of an occupant and detecting the position of the cigarette at the time of smoking, and detection. When smoking is detected by the means (39), a control means (6) for reducing the amount of conditioned air flowing toward the position of the cigarette is provided.

According to this, since the amount of conditioned air flowing toward the position of the cigarette is reduced during smoking, it is possible to prevent the ash of the cigarette from scattering during smoking.

According to a fourth aspect of the invention, the detecting means (3
9) is an infrared sensor that outputs a signal according to the amount of infrared radiation, and is characterized in that it is determined to be smoking when the amount of change in the output signal of the infrared sensor is equal to or greater than a predetermined value.

[0012] According to this, since the smoking is detected by the infrared sensor, a predetermined control can be performed immediately after the cigarette is lit (that is, before the cigarette ash is scattered). Can be reliably prevented.

In the invention described in claim 5, the detecting means (3
9) is an infrared sensor which outputs a signal according to the amount of infrared rays and has a large number of cells arranged in a matrix, and when the difference in the output signal values among the large number of cells becomes a predetermined value or more, The feature is that it is determined to be smoking.

According to this, since the smoking is detected by the infrared sensor, the predetermined control can be performed immediately after the cigarette is lit (that is, before the cigarette ash is scattered). Therefore, the cigarette ash at the time of smoking Can be reliably prevented.

Further, since the infrared sensor is in the form of a matrix, it is possible to detect the position of the cigarette during smoking. Therefore, the invention of claim 5 is suitable for carrying out the invention of claim 3.

In a sixth aspect of the present invention, as a blowing mode into the passenger compartment, a face mode for blowing conditioned air toward the upper body of the occupant, a foot mode for blowing conditioned air toward the feet of the occupant, and a window glass of the vehicle. It is possible to automatically switch between the defroster mode that blows out the conditioned air toward the passenger, the bi-level mode that blows the conditioned air toward the upper body of the occupant and the feet of the occupant, and the foot defroster mode that blows the conditioned air toward the feet of the occupant and the vehicle window glass. If you detect smoking in face mode, switch to defroster mode.If you detect smoking in bi-level mode, switch to either foot mode or foot defroster mode. Is characterized by.

According to this, since the conditioned air is not blown toward the upper body of the occupant during smoking, it is possible to reliably prevent the ashes of the cigarette during smoking.

The reference numerals in parentheses attached to the above-mentioned means indicate the correspondence with the concrete means described in the embodiments to be described later.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 6
Shows a first embodiment of the present invention, and FIG. 1 is a view showing a schematic configuration of an entire vehicle air conditioner.

The vehicle air conditioner 1 includes a case 2 which constitutes an air passage through which air flows toward the inside of the vehicle, and this case 2
An air blower 3 for generating an air flow toward the vehicle interior, an evaporator 4 for cooling the air flowing in the case 2, an air-mix type blow-out temperature adjusting device 5 for adjusting the temperature of the air blown into the vehicle interior, and each air conditioner. A control device 6 for controlling the equipment is provided.

The case 2 is arranged inside the instrument panel on the front side in the vehicle interior, and two inlets, an inside air inlet 7 and an outside air inlet 8, are provided on the upstream side of the case 2. An inside / outside air switching door 9 is rotatably arranged inside the inside air inlet 7 and the outside air inlet 8. The inside / outside air switching door 9 is driven by a servomotor 10, and has an inside air circulation mode in which the inside air (inside air) is introduced from the inside air inlet 7 and an outside air in which the outside air (outside air) is introduced from the outside air inlet 8. Switch to deployment mode.

On the downstream side of the case 2, a defroster outlet 11 for blowing out the conditioned air toward the window glass (mainly the windshield) of the vehicle, and a face outlet 12 for blowing out the conditioned air toward the upper body of the occupant. , And the foot outlet 13 for blowing out the conditioned air toward the lower body of the passenger.
There are different types of outlets.

The defroster door 14, the face door 15 and the foot door 1 are provided upstream of the air outlets 11 to 13.
6 is rotatably arranged. These defroster door 14, face door 15 and foot door 16 are driven by a common servo motor 17 via a link mechanism (not shown).

The rotation speed of the blower 3 is controlled by a blower motor 21 whose applied voltage is controlled by a blower drive circuit 20, sucks air from the inside air introduction port 7 or the outside air introduction port 8 and passes through the case 2 to pass through the vehicle interior. Blow to.

The evaporator 4 is a case 2 on the downstream side of the blower 3.
It is a heat exchanger for cooling that is disposed inside and cools the air sent by the blower 3, and is one of the elements constituting the refrigeration cycle 22.

The refrigeration cycle 22 is a well-known one in which the refrigerant is circulated from the compressor 23 to the evaporator 4 via the condenser 24, the receiver 25 and the expansion valve 26. The compressor 23 is rotationally driven by transmitting rotational power of a vehicle engine (not shown) via the electromagnetic clutch 23a.

The refrigeration cycle 22 obtains an air cooling function by the evaporator 4 by operating (turning on) the compressor 23,
When the operation of the compressor 23 is stopped (OFF), the air cooling function of the evaporator 4 is stopped.

The blow-out temperature adjusting device 5 is composed of a heater core 27, an air mix door 28 and the like in this example. The heater core 27 is a heating heat exchanger that heats air by using cooling water (hereinafter, referred to as hot water) of the vehicle engine as a heat source, and is arranged on the air flow downstream side of the evaporator 4 and heats cold air after passing through the evaporator 4. To do.

The air mix door 28 has a heater core 27.
Is rotatably arranged on the upstream side of the air flow of the heater core 27 and passes through the bypass passage 30 bypassing the heater core 27 and the air amount (warm air amount) passing through the heater core 27 according to the opening degree set by the servo motor 29. Adjust the air volume (cold air volume).

The control device (corresponding to control means) 6 is a CPU
The control program for controlling the air conditioning in the vehicle compartment is stored in advance in the ROM 32, and various calculations and processes are performed based on the control program.

At the output side of the control device 6, the servo motors 10, 17, 29 and the blower drive circuit 2 are respectively provided.
0 is connected, and the rotation speed of the blower motor 21 is controlled by the blower drive circuit 20. The servomotor 29 is provided with an air mix door opening sensor 34 that detects the opening θ of the air mix door 28, and this sensor 34 is connected to the input side of the control device 6.

The electromagnetic clutch 23a of the compressor 23 is connected to the output side of the control device 6 via the compressor drive circuit 23b, and the electromagnetic clutch 23a is in the connected state by energizing the coil of the electromagnetic clutch 23a. Becomes
As a result, the rotational force of the engine is transmitted to the compressor 23 and the compressor 23 is rotationally driven.

On the input side of the control device 6, an inside / outside air changeover switch 36, a temperature setting switch 37, a defroster installed on an air conditioning operation panel 50 provided on an instrument panel (not shown) in front of the driver's seat in the vehicle interior. The mode setting switch 38 and the infrared sensor 39 are connected. Further, the outside air sensor 40, the water temperature sensor 41, the solar radiation sensor 42, and the evaporator temperature sensor 43 are connected to the input side of the control device 6.

The infrared sensor (corresponding to detection means) 39 is
It mainly detects non-contact changes in the amount of infrared rays that accompany changes in the surface temperature of the upper body of the occupant, and thereby detects the surface temperature of passengers inside the vehicle (specifically, the driver). A thermopile type detection element which produces a corresponding change in electromotive force can be used.

Here, FIG. 2 shows the field of view of the infrared sensor 39 installed on the air conditioning operation panel 50, which is set at 50 ° with the driver substantially in the center. FIG. 3 shows an output example of the infrared sensor 39. When the driver smokes, a high temperature cigarette enters the visual field range of the infrared sensor 39, so the output of the infrared sensor 39 increases during smoking.

FIG. 4 shows the amount of change in the output of the infrared sensor 39 when a disturbance such as a cigarette enters the visual field range of the infrared sensor 39. FIG. When drinking coffee, (c) is a hand for operating the air conditioning operation panel 50 to operate the air conditioning operation panel 50.
It is when the value approaches 0, and the output change amount is larger during smoking than other disturbances. Therefore, when the output change amount is large, it can be estimated that the output is during smoking.

The infrared sensor 39 directly detects the occupant surface temperature, but since the occupant surface temperature is affected by the inside temperature of the passenger compartment, it is said that the information includes changes in the inside temperature. be able to. Therefore, the inside air temperature sensor is omitted in this example.

The outside air temperature sensor 40 detects the temperature outside the passenger compartment,
The outside temperature signal Tam corresponding to the detected temperature is input to the control device 6. Water temperature sensor 41 and evaporator temperature sensor 43
Detects the temperature of the hot water and the temperature of the air blown from the evaporator 4, and inputs the water temperature signal Tw and the evaporator temperature signal Te corresponding to the detected temperatures to the control device 6. Solar sensor 42
Is for detecting the amount of solar radiation that has entered the vehicle interior, detecting the amount of solar radiation Ts corresponding to the detected amount of solar radiation, and inputting it to the control device 6.

Next, the operation of the first embodiment having the above structure will be described with reference to the flowchart of FIG.

The control device 6 starts the control program when the power is turned on, and executes the calculation and processing according to the flowchart of FIG.

First, in step S1, various timers and control flags are initialized. Next, in step S2, the set temperature signal TSET is read from the temperature setting switch 37 and stored in the RAM 33.

Subsequently, in step S3, input signals are read from various sensors in order to detect a vehicle environmental condition that affects the air conditioning condition in the vehicle interior. That is, the outside air temperature signal TAM from the outside air temperature sensor 40, the water temperature signal TW from the water temperature sensor 41, the insolation amount signal TS from the insolation sensor 42, and the evaporator temperature signal TE from the evaporator temperature sensor 43 are read and stored in the RAM 33. Remember.

In step S3, the infrared sensor 3
The output of the infrared sensor 39 is sampled every predetermined time (250 msec in this example), and the output of the infrared sensor 39 at the time of sampling is set as the surface temperature detection value #TIR in the RAM 33.
Further, in order to suppress the influence of disturbance and noise, the average value of a plurality of (16 in this example = 4 sec) surface temperature detection values #TIR is stored in the RAM 33 as the surface temperature control value TIR.

Next, in step S4, the target outlet temperature TAO of the air blown into the vehicle compartment is calculated based on the following mathematical formula 1. This target outlet temperature TAO is a control target temperature of the outlet air required to maintain the vehicle compartment temperature at the set temperature TSET regardless of changes in vehicle environmental conditions (air conditioning heat load conditions).

[0045]

[Equation 1] TAO = KSET / TSET-KIR / TIR
-KAM / TAM-KS / TS + C where KSET is a temperature setting gain, KIR is a surface temperature gain, KAM is an outside temperature gain, KS is a solar radiation gain, and C is a correction constant.

Then, in step S5, the air volume of the blower 3 is set based on the above-mentioned target outlet temperature TAO and the like. Specifically, the blower voltage BLW applied to the blower motor 21 via the blower drive circuit 20 is determined. The blower voltage BLW is determined according to the control map stored in advance in the ROM 32 based on the target outlet temperature TAO calculated in step S4.

Next, in step S6, the target opening θO of the air mix door 28 is calculated by the following equation 2.

[0048]

## EQU2 ## θO = {(TAO-TE) / (TW-TE)}
× 100 (%) TW is a water temperature signal of the water temperature sensor 41.

Next, in step S7, the inside air circulation mode for introducing the vehicle interior air (inside air) from the inside air introduction port 7 is performed or the outside air (outside air) from the outside air introduction port 8 is performed based on the target outlet temperature TAO. ) Determines whether to perform the outside air introduction mode.

Specifically, in a region (maximum cooling region) where the target outlet air temperature TAO is below a predetermined temperature, the inside / outside air switching door 9 fully opens the inside air introduction port 7 and completely closes the outside air introduction port 8. When the mode is selected and the target outlet temperature TAO becomes higher than a predetermined temperature, the inside / outside air switching door 9 fully opens the outside air introduction port 8 and completely closes the inside air introduction port 7 to select the outside air circulation mode. An inside / outside air combined mode may be set between the inside air circulation mode and the outside air circulation mode to introduce the inside air and the outside air at the same time.

Next, in step S8, the compressor 23
The intermittent control of the operation is determined by turning on and off the power supply to the coil of the electromagnetic clutch 23a. Specifically, the target temperature TEO of the evaporator temperature is compared with the actual evaporator temperature TE, and when TE is higher than TEO, the energization of the electromagnetic clutch 23a is turned on to operate the compressor 23. On the contrary, TE
Becomes lower than TEO, the energization of the electromagnetic clutch 23a is turned off and the operation of the compressor 23 is stopped. By such intermittent control of the compressor operation, the actual evaporator temperature TE is maintained at the target temperature TEO.

Succeedingly, in a step S9, a blowing mode is determined. A specific example of this blowout mode determination will be described later. Then, in step S10, the aforementioned steps S5 to S are performed.
The control signal determined in 9 is output to the blower drive circuit 20, the servomotors 10, 17, 29, the compressor drive circuit 23b, and the like to output the blower 3, the inside / outside air switching door 9, the blowout mode doors 14 to 16, and the air mix door 28. And controlling the operation of the compressor 23.

In the next step S11, step S
It is judged whether or not the control cycle time τ has elapsed after executing the processing of 10. If the result of this judgment is NO, the control cycle time τ is waited for. Moreover, the judgment result is YES.
In the case of, the process returns to step S2, and the above calculation and process are repeated. By repeating such calculation and processing, the operation of the vehicle air conditioner 1 is automatically controlled.

Next, a specific example of the blowout mode determination in step S9 will be described in detail with reference to FIG. First, step S
In 91, the blowing mode is set to face (Fa) as the target blowing temperature TAO rises based on the characteristic diagram (control map) for determining the blowing mode stored in the ROM 32 in advance.
(se) mode-> bi-level (B / L) mode-> foot mode.

In the face mode, the face outlet 15 is opened by the face door 15 and the foot door 16 is opened.
The foot blower outlet 13 is closed with, and the defroster blower door 11 is closed with the defroster door 14. As a result, the conditioned air is blown from only the face outlet 12 to the upper body side of the passenger in the vehicle compartment.

In the bi-level mode, the face door 15 opens the face outlet 12, the foot door 16 opens the foot outlet 13, and the defroster door 14 closes the defroster outlet 11. As a result, the conditioned air is
Both the face outlet 12 and the foot outlet 13 blow out simultaneously to the occupant's upper body side and the occupant's feet side in the passenger compartment.

In the foot mode, the face door 15 closes the face outlet 12, the foot door 16 fully opens the foot outlet 13, and the defroster door 14 opens the defroster outlet 11 by a small opening. As a result, the blowing of the conditioned air from the face outlet 12 to the upper body side of the occupant is blocked, and the conditioned air is mainly blown from the foot outlet 13 to the occupant's feet side in the passenger compartment, and at the same time, the defroster outlet 11 causes a small amount of air conditioning. The wind blows to the inside of the window glass in the passenger compartment.

Next, in step S92, the amount of change in surface temperature ΔTIR and the threshold value Tci are compared to estimate whether or not smoking is in progress. It should be noted that the surface temperature change amount ΔTIR is determined by the surface temperature detection value #TIR and the previous surface temperature control value TIRol
difference from d (ie, ΔTIR = # TIR−TIRol
d). The threshold value Tci is set to 2 ° C. in this example.

As described above, since the output change amount is larger than that of other disturbances during smoking, the surface temperature change amount ΔTI
When R is larger than the threshold value Tci, it is estimated that smoking is in progress (YES in step S92), and a smoking signal is output (step S93).

Next, when a smoking signal is output, the process proceeds to step S94, and in this step S94, step S94 is performed.
It is determined whether the blowout mode determined in 91 is the face mode or the bi-level mode. Then, in the face mode and the bi-level mode, the conditioned air is blown from the face outlet 12 toward the upper body of the occupant and the cigarette ash is scattered. Therefore, in the face mode or the bi-level mode (YES in step S94), the cigarette ash is The blowout mode is switched in step S95 in order to prevent the scattering.

In this step S95, step S91
When the blowout mode determined in step 1 is the face mode, it is uncomfortable to blow the conditioned air from the feet, so the blowout mode is switched to the defroster (Def) mode.
When the blowout mode determined in step S91 is the bilevel mode, the blowout mode is switched to the foot mode or the foot defroster (F / D) mode so that the conditioned air is blown from the feet.

In the defroster mode, the face air outlet 12 is closed by the face door 15 and the foot door 1
6, the foot outlet 13 is closed, and the defroster door 14 is closed.
The defroster outlet 11 is fully opened. As a result, the conditioned air is blown out only from the defroster outlet 11 to the inner surface of the window glass in the vehicle compartment.

In the foot defroster mode, the face outlet 12 is closed by the face door 15 and the foot door 16 is closed.
The foot outlet 13 is fully opened, and the defroster door 11 is fully opened by the defroster door 14. As a result, substantially the same amount of conditioned air is blown out from the foot outlet 13 and the defroster outlet 11.

Next, in step S96, step S9
A predetermined time t has passed since the switching of the blowing mode in 5
After the elapse of (for example, 4 minutes), the smoking signal in step S93 is canceled. By canceling this smoking signal,
In step S97, the blowout mode determined in step S91 is restored.

In this embodiment, if smoking is performed in the blowing mode (face mode and bilevel mode) in which the conditioned air is blown from the face outlet 12 toward the upper body of the occupant, the conditioned air is not blown from the face outlet 12. The mode is switched to prevent cigarette ash from scattering.

(Second Embodiment) In the first embodiment, when smoking is performed in the blowing mode in which the conditioned air is blown from the face outlet 12, the blowing mode is switched to the blowing mode in which the conditioned air is not blown from the face outlet 12. But the second
In the embodiment, an air purifier is added to the air conditioner of the first embodiment, and at the time of smoking, the air purifier is automatically operated in addition to the same control as that of the first embodiment.

As is well known, the air purifier (not shown) comprises a fan for generating an air flow, a filter for trapping dust in the air and removing odors, a controller for controlling the operation of the fan, and the like. , This controller has an infrared sensor 3
The output signal 9 (see FIG. 1) is input.

The flow chart of FIG. 7 shows only the portion of the processing when smoking among the processing executed by the control device of the air purifier. Based on this FIG. 7, the operation of the air purifier during smoking is shown. explain.

First, in step S110, the amount of change in surface temperature ΔTIR and the threshold value Tci are compared to estimate whether or not smoking is in progress. Then, when the surface temperature change amount ΔTIR is larger than the threshold value Tci, it is estimated that smoking is in progress (YES in step S110), a smoking signal is output (step S120), and the air purifier (A / P) is activated. (Step S130).

Next, in step S140, step S
After a predetermined time t (for example, 4 minutes) has elapsed from the start of operation of the air purifier in 130, the smoking signal in step S120 is canceled. By canceling this smoking signal, the air purifier is stopped in step S150.

According to the present embodiment, the ash scattering of the cigarette is prevented by the same control as that of the first embodiment, and the air purifier automatically operates during smoking, so that the odor of the cigarette is also removed. be able to.

Further, since the conventional air purifier detects smoking by the smoke sensor that detects cigarette smoke, the air purifier starts to operate after the air in the passenger compartment is contaminated with the cigarette smoke. Since smoking is detected by the infrared sensor 39 in the present embodiment, it is possible to detect smoking and operate the air purifier immediately after the cigarette is lit (that is, before the air inside the vehicle is contaminated with cigarette smoke).

Further, since the output signal of the infrared sensor 39 of the air conditioner is input to the control device of the air purifier, the smoke sensor of the conventional air purifier described above can be eliminated.

In this embodiment, the output signal of the infrared sensor 39 of the air conditioner is input to the control device of the air purifier, but the infrared sensor dedicated to the air cleaner is used and the output signal of the dedicated infrared sensor is used. Based on step S11
You may make it determine 0. If the airbag device (not shown) uses an infrared sensor for occupant detection, step S11 is performed based on the output signal from the infrared sensor.
You may make it determine 0.

(Other Embodiments) The infrared sensor 39 in each of the above embodiments may be a single element infrared sensor or a matrix infrared sensor in which a plurality of elements (cells) are arranged in a matrix. Good. And
In the case of a matrix infrared sensor, since the difference in the output signal value between the elements is large between the element in which the cigarette is within the field of view and the other element, when the difference in the output signal value between the elements exceeds a predetermined value, It can be determined to be smoking.

In each of the above-described embodiments, when smoking, in addition to the same control as that in each of the above-described embodiments, the outside air introduction mode may be set for ventilation. However, if you are equipped with an exhaust gas sensor that detects the components of the introduced air (outside air) and it is determined that the introduced air is contaminated above a certain level based on the output signal of the exhaust gas sensor, it is during smoking. Also, it is desirable to set the inside air introduction mode.

In each of the above embodiments, the face outlet 12
When smoking in the blowing mode in which the conditioned air is blown toward the upper body of the occupant, the mode is switched to the blowing mode in which the conditioned air is not blown from the face outlet 12,
When smoking is performed in the blowing mode in which the air conditioning air is blown from the face air outlet 12 toward the upper body of the occupant, the cigarette ash is scattered even if the rotation speed of the blower motor 21 is reduced to reduce the air conditioning air blowing amount. Can be prevented.

When smoking is performed in the blowing mode in which the conditioned air is not blown from the face outlet 12, the rotation speed of the blower motor 21 may be increased for ventilation to increase the blowing amount of the conditioned air.

When smoking, in addition to the same control as in each of the above-described embodiments, a window may be automatically opened for ventilation. However, when rain is detected by a rain sensor or wiper drive, it is desirable not to open the window even when smoking.

Further, in the case of the matrix infrared sensor, since the temperature of a different portion can be detected for each element, it is possible to detect the seat where the user is smoking and determine the optimum ventilation for the smoking seat. You may open the window.

Further, in a vehicle air conditioner having a so-called swing louver in which the blowout grill provided at the face outlet 12 is driven by an actuator such as an electric motor to automatically change the blowout direction of the conditioned air. When smoking in the blowing mode in which the conditioned air is blown from the face outlet 12 toward the upper body of the occupant, the blowing grill is driven by the actuator without changing the blowing mode to blow air to the position of the cigarette. The blowing direction of the conditioned air may be changed so as to avoid it. The blowing direction of the conditioned air at this time is a portion other than the upper half of the occupant's upper body, and can be blown toward the ceiling side with the blowing direction facing upward, for example.

Further, when the position of the cigarette at the time of smoking can be detected, the amount of conditioned air flowing toward the position of the cigarette may be reduced to prevent the ash of the cigarette from scattering. At this time, the amount of the conditioned air flowing toward the position of the cigarette is reduced by changing the blowing mode, lowering the rotation speed of the blower motor 21, or driving the blowing grill of the swing louver to change the blowing direction. be able to.

Further, in a vehicle air conditioner having a swing louver, when the blowing direction when not smoking is fixed to the occupant's upper body side, during smoking, the position is between the position of the cigarette (occupant's upper body) and another position. Swinging the blowout grille may reduce the amount of conditioned air flowing towards the tobacco position. In addition, when the blowing grill is swung within the range including the upper body of the occupant when not smoking,
By changing the swing range of the blowing grill when smoking, the proportion of the time that the conditioned air is blown toward the upper body of the occupant is made shorter than when it is not smoking, thereby reducing the amount of conditioned air that goes to the position of the cigarette. May be.

In each of the above embodiments, smoking determination is made based on the output signal of the infrared sensor 39.
By detecting the cigarette itself with an image sensor such as a camera or a CMOS camera, the smoking determination may be performed before the cigarette is lit, and the same control as that in each of the above embodiments may be performed.

Further, in the first embodiment described above, after switching the blowout mode in step S95 during smoking, after a predetermined time t has passed, the blowout mode is returned to the original state in step S97. Smoking end is estimated from the amount of change in the output signal, and when smoking end is estimated,
The blowing mode may be returned to the original in step S97.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is a plan view of a vehicle showing a visual field range of an infrared sensor 39 shown in FIG.

FIG. 3 is a diagram showing an output example of an infrared sensor 39 of FIG.

FIG. 4 is a diagram showing an output change amount when a disturbance enters the visual field range of the infrared sensor 39 of FIG.

FIG. 5 is a flowchart showing an overview of the entire air conditioning control according to the first embodiment.

FIG. 6 is a flowchart showing a specific example of blowout mode determination according to the first embodiment.

FIG. 7 is a flowchart showing control of the air purifier according to the second embodiment.

[Explanation of symbols]

6 ... a control device forming a control means, 12 ... a face outlet,
39 ... Infrared sensor forming a detecting means.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeki Harada             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO F-term (reference) 3L011 CP04

Claims (6)

[Claims] 1. A face outlet (12) for blowing out conditioned air to the upper body side of an occupant in a passenger compartment, a detection means (39) for detecting smoking of the occupant, and a detection of smoking by the detection means (39). A vehicle air conditioner characterized by comprising: a control means (6) for reducing the amount of the conditioned air blown from the face outlet (12). 2. A vehicle air conditioner capable of automatically changing the blowing direction of conditioned air; a detection means (39) for detecting smoking of an occupant; and when the detection means (39) detects smoking, A vehicle air conditioner comprising: a control unit (6) for changing the blowing direction of the conditioned air to a portion other than the upper body of the occupant. 3. An air conditioner for a vehicle, which blows out conditioned air into a passenger compartment, detects a smoke of an occupant, and detects a position of a cigarette at the time of smoking, and a smoke by the detecting means (39). And a control means (6) for reducing the amount of the conditioned air flowing toward the position of the cigarette when the air conditioner is detected. 4. The detecting means (39) is an infrared sensor that outputs a signal according to the amount of infrared radiation, and when the amount of change in the output signal of the infrared sensor exceeds a predetermined value, it is determined that smoking is in progress. Claim 1 characterized by the above.
5. The vehicle air conditioner according to any one of 1 to 3. 5. The detection means (39) is an infrared sensor that outputs a signal according to the amount of infrared light and has a large number of cells arranged in a matrix, and outputs the output signal value between the large number of cells. The vehicle air conditioner according to any one of claims 1 to 3, wherein when the difference is equal to or more than a predetermined value, it is determined that smoking is in progress. 6. The blowing mode into the passenger compartment is a face mode for blowing conditioned air toward the upper body of the occupant, a foot mode for blowing conditioned air toward the feet of the occupant, and a conditioned wind toward the window glass of the vehicle. A vehicle capable of automatically switching between a defroster mode, a bi-level mode that blows conditioned air toward the upper body of the occupant and the feet of the occupant, and a foot defroster mode that blows conditioned air toward the feet of the occupant and the vehicle window glass. An air conditioner for use, when smoking is detected during the face mode, the mode is switched to the defroster mode, and when smoking is detected during the bi-level mode, one of the foot mode and the foot defroster mode is selected. The air conditioner for vehicles according to claim 1 or 3, which is switched.