JP2600401Y2 - Inside / outside air switching control device for 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 inside / outside air switching control device for a vehicle air conditioner mounted on an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus includes a control unit for controlling the switching of intake air into a vehicle to outside air or inside air, and an odor sensor for detecting an odor such as exhaust gas.
In the inside / outside air switching control device, when the odor sensor detects an odor generated outside the vehicle while the vehicle is traveling, the control unit drives and controls the damper, and introduces the outside air for introducing the outside air through the introduction path for performing the intake. It automatically switches to the inside air introduction path for circulating inside air from the road, and the inside air is sucked into the inside of the car by the inside air circulation to prevent the odor from entering the inside of the car. Further, when the odor sensor stops detecting a bad odor, in the inside / outside air switching control device, the control unit again controls the driving of the damper, and automatically switches the intake path for intake from the inside air introduction path to the outside air introduction path. In addition, the inside of the car was taken in by introducing outside air.

[0003]

However, in the above apparatus, when the temperature difference between the outside air and the inside air such as rainy weather becomes large, when the odor sensor detects the bad odor and the intake air is switched from the introduction of the outside air to the circulation of the inside air, the cabin of the vehicle compartment is disturbed. There is a problem in that the provided windshield or the like may become cloudy and the visibility may be deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in the event of rain or the like, a vehicular air conditioner capable of maintaining the outside air introduction state without switching to the inside air circulation and preventing fogging of glass. It is an object of the present invention to provide an inside / outside air switching control device.

[0005]

In order to achieve the above object, the present invention provides an odor sensor for detecting odor of outside air ;
A raindrop detecting means for detecting moisture in the outside air,
If moisture in the water is detected, the
Regardless of odor detection, control is performed to switch the intake state into the vehicle to the outside air introduction state, and the moisture in the outside air is detected.
If there is no odor, the odor of the outside air detected by the odor sensor
Accordingly, the state of intake air into the vehicle is changed to an outside air introduction state or an inside air state.
Control means for switching and controlling the air circulation state .

[0006]

Even if the odor sensor detects a bad odor, in the case of rainy weather, the state of intake into the vehicle is switched to the state of introduction of outside air by a control means such as an air conditioning controller, and the state is maintained. Therefore, clouding of the glass can be prevented, and a good view can be secured.

[0007]

EXAMPLES Examples of the present invention based on the drawings of FIG. 1 will be described. FIG. 1 is a block diagram showing a first embodiment of the configuration of the inside / outside air switching control device for a vehicle air conditioner according to the present invention. In the figure, an air conditioning panel switch 10 is, for example, a control switch that instructs a connected air conditioning controller 11 to perform fully automatic air conditioning, a changeover switch that instructs to switch intake air into the vehicle to outside air or inside air, It is composed of an air volume switch for instructing the air volume to be blown out.

The odor sensor 12 is disposed in front of the vehicle and detects an odor such as exhaust gas discharged from the vehicle in front of the vehicle when traveling uphill or in a traffic jam.
To the air-conditioning controller 11. Raindrop sensor 1
Numeral 3 is disposed at a predetermined position outside the vehicle (for example, above the vehicle), detects rain falling outside the vehicle, and sends information (detection signal) to the air conditioning controller 11.

The inside / outside air switching actuator 14 is driven and controlled by the air conditioning controller 11, and includes a damper 22 for switching between an outside air introduction passage 20 for introducing outside air and an inside air introduction passage 21 for circulating inside air. Move. That is, the damper 22 is
Is moved to the position indicated by the solid line due to the
The inside air is circulated by the rotation of 3, and the damper 22
When the actuator 14 is driven to move to the position indicated by the one-dot chain line, the rotation of the fan 23 introduces outside air into the cabin of the vehicle.

The air-conditioning controller 11 receives detection signals from the odor sensor 12 and the raindrop sensor 13. In the case of fully automatic control, when the detection signal indicating that an odor is detected is detected from the odor sensor 12, the inside / outside air switching is performed. The drive of the actuator 14 is controlled to move the damper 22 to the position indicated by the solid line, and the inside air circulation is performed using the inside air introduction path 21. When the air conditioning controller 11 receives a signal indicating that no odor is detected from the odor sensor 12, the air conditioning controller 11 drives and controls the actuator 14 to move the damper 22 to the position indicated by the dashed line, and uses the outside air introduction path 20. Introduce outside air.

When the air-conditioning controller 11 receives a detection signal indicating that rain has been detected from the raindrop sensor 13 when the air-conditioning controller 11 is performing internal air circulation, the air-conditioning controller 11
Controls the driving of the inside / outside air switching actuator 14 to move the damper 22 to the position indicated by the alternate long and short dash line.
Use 0 to introduce outside air into the room. That is, when the air conditioning controller 11 receives a detection signal indicating that rain has been detected from the raindrop sensor 13 during rainy weather, the air conditioning controller 11 responds to the detection signal from the raindrop sensor 13 irrespective of the presence or absence of the detection signal from the odor sensor 12. 22 is moved to the position indicated by the alternate long and short dash line, and that state is maintained. Further, when the detection signal is not input from the raindrop sensor 13, the air conditioning controller 11 performs the inside / outside air switching control again according to the detection signal from the odor sensor 12.

Therefore, in the present embodiment, in the case of rainy weather, the operation is controlled so as not to perform the switching operation to the internal air circulation, and the external air can always be introduced from the external air introduction passage 20. Can be prevented,
Good forward visibility can be ensured. In the present invention, for example, instead of the raindrop sensor, a wiper switch for driving a wiper can be linked. In this case, when the air-conditioning controller 11 captures the wiper-on signal from the wiper switch, the air-conditioning controller 11 responds to the wiper-on signal from the wiper switch in the same manner as in FIG. Can be moved to the position indicated by the alternate long and short dash line, and the above state can be maintained. When a wiper off signal is taken in from the wiper switch, the air conditioning controller 11 again performs inside / outside air switching control according to the detection signal from the odor sensor 12. In this example, the parts (wiper switches) that are conventionally equipped
, It is possible to perform inside / outside air switching control, so that an increase in the number of parts can be prevented.

[0013]

As has been described above devised], search in the present invention, the odor sensor for detecting the outside air odor, moisture in the outside air
Raindrop detecting means to know, and moisture in the outside air is detected
In the case, regardless of the odor detection from the odor sensor
Switching the state of intake air into the vehicle to the state of outside air introduction,
If the moisture in the outside air is not detected,
Into the vehicle according to the odor of the outside air detected by the air sensor.
Control means for switching the air intake state to the outside air introduction state or the inside air circulation state, thereby maintaining the outside air introduction state without switching to the inside air circulation in rainy weather, etc. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a configuration of an inside / outside air switching control device for a vehicle air conditioner according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 air conditioning panel switch 11 air conditioning controller 12 odor sensor 13 raindrop sensor 14 inside / outside air switching actuator 22 damper

Continuation of the front page (56) References JP-A-62-292521 (JP, A) JP-A-62-8816 (JP, A) JP-A-60-248422 (JP, A) , U) Hikaru Hei 3-64808 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60H 1/00 103 H

Claims (1)

(57) [Scope of request for utility model registration] 1. A and odor sensor for detecting the outside air odor, and rain detection means for detecting the moisture in the ambient air, if the water in the ambient air is detected, the odor sensor
Regardless odor detection from sub intake state into the vehicle is switched to control the outside air introduction state and moisture in the outside air
If not detected, the outside air detected by the odor sensor
Depending on the odor of the vehicle,
Control means for switching between a normal state and an internal air circulation state .