JP2781680B2 - Vehicle air conditioner - Google Patents

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.

[0002]

2. Description of the Related Art An example of a conventional vehicle air conditioner is shown in FIG.
Is shown in Reference numeral 1 denotes a front seat side air conditioning unit installed at the front of the vehicle, which includes a blower 2, an evaporator 3, a heater 4, an air mix damper 5, a rear seat air distribution damper 6, an inside / outside air switching damper 9, and the like. .

When the front air conditioning unit 1 is operated, the blower 2 is driven, and the outside air or the inside air selected by switching the inside / outside air switching damper 9 is supplied to the blower 2.
Is cooled by flowing through the evaporator 3. The air cooled by the evaporator 3 is diverted by an air mix damper 5, one of which is a heater 4.
In the process of flowing through the heater 4, the temperature is raised by exchanging heat with the engine cooling water circulating through the heater 4, and then mixed with the other flow bypassing the heater 4 to form conditioned air at a predetermined temperature. When the rear-seat air distribution damper 6 is closed, the conditioned air is blown out from the front-seat outlet 7 into the front part of the vehicle interior 27 to mainly air-condition the front seat 30 side. When the rear-seat air distribution damper 6 is opened, a part of the conditioned air is blown out through the duct 8 to the rear inside the vehicle compartment 27.

[0004] Reference numeral 10 denotes an air purifier installed at the rear of the vehicle, and includes an air filter 14 such as a blower 12, an exhaust damper 13, a deodorizing filter, and an electrostatic filter. During operation of the air purifying device 10, the air in the passenger compartment is sucked in by the blower 12, and is blown out from the rear outlet 15 which is purified by flowing through the air filter 14 to the rear part in the passenger compartment 27. When the exhaust damper 13 is switched to the position shown by the broken line, the air in the passenger compartment is sucked in by the blower 12 and discharged from the exhaust port 16 to the outside of the vehicle through the trunk room.

The detection values of the outside air temperature sensor 32, the room temperature sensor 33, the solar radiation sensor 34 for the front seat, the dirt sensor 35, etc. are sent to the central processing unit CPU, read-only memory ROM, random access through a multiplexer, an A / D converter and the like. It is input to a control device (not shown) composed of a microcomputer having a memory RAM and the like. In addition, a control panel installed in front of the driver's seat includes an operation switch of the air conditioning unit 1 on the front seat side, an air cleaning device 10.
Operation switch, inside / outside air switching damper 9, opening / closing switch for rear seat air distribution damper 6 and exhaust damper 13, cooling operation switch for setting cooling operation, air volume switching switch for switching the rotation speed of blowers 2 and 12, automatic air conditioning control An AUTO switch for control, a room temperature setting device for arbitrarily setting the temperature in the passenger compartment 27, and the like are provided, and their outputs are also input to the controller. The output of this control device is sent to dampers 5, 6, 9, 13 and blowers 2, 12, etc., via a driver (not shown) to control the operation thereof.

[0006]

In the conventional apparatus described above, when the air in the vehicle interior is very dirty or when a large amount of tobacco smoke is generated, the air in the vehicle interior can be cleaned even if the air purifier is operated. There was a problem that it could not be improved.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to operate the vehicle in accordance with the degree of contamination of the vehicle interior air detected by a dirt sensor. In the air conditioner for a vehicle having the air purifying device to be stopped, the degree of improvement in the degree of dirt on the air in the vehicle compartment is determined by a predetermined value after a lapse of a predetermined time after the operation of the air purifying device based on the detection value of the dirt sensor. A vehicle air conditioner is provided with control means for stopping the air purifying device at the following time and activating ventilation means for air in the vehicle interior.

[0008]

According to the present invention, the degree of improvement in the degree of dirt in the air in the vehicle compartment is determined after a predetermined time has elapsed since the operation of the air purifier based on the detection value of the dirt sensor. Is less than or equal to a predetermined value, the air purifying device is stopped and the ventilator is operated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
FIG. 1 is a control block diagram, and FIG. 2 is a flowchart.
The configuration of the air conditioner is the same as the conventional one shown in FIG. As shown in FIG. 1, the output of the operation switch 36 of the air cleaning device 10 is input to the operation / stop means 43 of the air cleaning device of the control device 30. Here, based on the ON / OFF of the operation switch 36, the air cleaning device 10 is turned on. Operation / stop is determined. The detection value of the dirt sensor 35 is input to the storage means 40 and stored therein, and at the same time, is input to the comparison means 41 where the setting means
It is compared with the set value entered from 42. As a result of the comparison, if the detected value is equal to or more than the set value, the operation / stop means 43 of the air purifying apparatus receives the output of the comparing means 41 and determines the operation of the air purifying apparatus. This result is output to the air purifier 10, and the air purifier 10 starts operating. At the same time, the result of this determination is output to the timer 45, and the timer 45 starts counting. When the time set in the timer 45 has elapsed, that is, when the air purifying apparatus 10 has been operated for a predetermined time, the timer
45 instructs the improvement degree judging means 46 to that effect. Then
The degree-of-improvement determining means 46 compares the detection value input from the dirt sensor 35 with the degree of dirt stored in the storage means 40 to determine the rate of change of dirt, ie, the degree of improvement. Here, when the degree of improvement is determined to be equal to or less than the set value set in the setting means 47, the result of this determination is determined by the operation / stop means 43 of the air cleaning device.
And the operation / stop means 43 decides to stop the air cleaning device. The above determination result is input to the ventilator operating means 48, where the operation of the ventilator is determined. The result of this determination is output to ventilation means 49 such as an exhaust damper 13, an inside / outside air switching damper 9, a power window device, and an indicator. Thus, one or more of the ventilating means 49 are operated, the exhaust damper 13 is opened, the inside / outside air switching damper 9 is switched to the introduction of outside air, the window is opened by the power window device, and the indicator provided on the control panel is ventilated. Is displayed.

As shown in FIG. 2, when the control is started in step 100, the degree of contamination of the vehicle interior air is detected by the contamination sensor 35 in step 101. Then step
At 102, it is checked whether the degree of contamination is equal to or more than a predetermined value, and in that case, at step 103, the air cleaning device 10 starts operating. Next, at step 104, it is checked whether or not a predetermined time has elapsed, and when it has elapsed, at step 105, the dirt degree of the vehicle interior air is detected by the dirt sensor 35. Next, at step 106, it is confirmed whether or not the degree of dirt improvement is equal to or greater than a predetermined value. If not, the air purifying device is stopped at step 107, and then the ventilation means is activated at step 108. If no in step 102 and if
If YES is determined in step 106, the process returns to step 101.
After step 108, the process proceeds from step 109 to the next control routine.

[0011]

According to the present invention, the degree of dirt improvement of the air in the vehicle interior is determined after a predetermined time has elapsed since the operation of the air purifier based on the detection value of the dirt sensor, and when the degree of improvement is less than the predetermined value. The air purifier is stopped and the ventilation means is activated. As a result, the dirty air in the vehicle interior can be quickly improved by ventilating the air, and the air control device is stopped while the ventilator is operating, so that the energy required for the operation can be prevented from being wasted, and the air filter can be prevented. Wear can be suppressed.

[Brief description of the drawings]

FIG. 1 is a control block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart of the embodiment.

FIG. 3 is a schematic sectional view of a conventional air conditioner.

[Explanation of symbols]

 30 Control device 36 Air purifier operation switch 35 Dirt sensor 43 Air purifier operation / stop means 45 Timer 46 Improvement degree judgment means 48 Ventilation means activation means 49 Ventilation means 10 Air purification device

Claims (1)

(57) [Claims] 1. An air conditioner for a vehicle, comprising: an air purifying device that is operated and stopped according to a degree of dirt of air in a vehicle cabin detected by a dirt sensor. A control means for stopping the air purifying device and activating the vehicle interior air ventilation means when the degree of improvement of the air pollution of the vehicle interior is less than or equal to a predetermined value after a predetermined time has elapsed after the operation of the apparatus. Vehicle air conditioner.