JPH0820221A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To keep temperature distribution inside of a vehicle in a condition in which one's head is kept cool and one's feet are kept wardm so as to prevent flush on one's cheeks by adjusting quantity of cool air blown from a face blow- out port through a cool air bypass passage. CONSTITUTION:An air conditioner for vehicle is provided with a damper controller 30 comprising at least a sensor 32 for detecting temperature inside of a vehicle, a means 31 for computing degree of flush on one's cheeks based on the value detected by an outside air temperature sensor 33, an opening degree determining means 35 which determines a degree of opening of a damper in accordance with the computed degree of flush on one's cheeks, and an output means 37 which outputs the degree of opening to a damper motor 38 and drives it.

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 A schematic configuration of a conventional vehicle air conditioner is shown in FIG. An inside air inlet 13 and an outside air inlet 14 are formed on the upstream side of the casing 12 of the air conditioner 10, and a face outlet 20, a defrost outlet 23, and a foot outlet 24 are formed on the downstream side. The inside air inlet 13 and the outside air inlet 14 are switched by an inside / outside air switching damper 15, and the face outlet 20, the defrost outlet 23, and the foot outlet 24 are opened / closed by outlet mode switching dampers 25, 26, 27, respectively.

A blower 16, a cooling coil 17, an air mix damper 18, and a heater core 19 are arranged in the casing 12. The cooling coil 17 constitutes a refrigeration cycle by being connected to a compressor, a condenser, a receiver, an expansion valve and the like (not shown) via a refrigerant pipe. The cooling water of the running engine circulates in the heater core 19, and the air volume passing through the heater core 19 is controlled by the air mix damper.
It changes according to the opening of 18.

A cold air bypass passage 28 is provided for guiding the air flowing through the cooling coil 17 to the face outlet 20 by bypassing the heater core 19. The cold air bypass passage 28 is opened and closed by a damper 29.

When the blower 16 is driven, the inside / outside air switching damper
The inside air or the outside air is supplied from the inside air intake port 13 or the outside air intake port 14 selected by switching 15 to the casing 12
After being sucked into the inside and being energized by the blower 16, it is cooled by passing through the cooling coil 17. Next, this air is diverted by the air mix damper 18, a part of which is passed through the heater core 19 to be heated,
It mixes with the rest of the air to produce conditioned air at a given temperature. Then, this conditioned air is any one or two of the face outlet 20, the defrost outlet 23, and the foot outlet 24 selected by opening and closing the outlet mode switching dampers 25, 26, 27.
Is blown into the passenger compartment.

When the heating operation is continued in the foot blowing mode, the warm air blown into the vehicle compartment from the foot outlet 24 stays in the upper portion of the vehicle compartment. In this case, by opening the damper 29, the cold air bypassing the heater core 19 is blown from the face outlet 20 to the occupant's face through the cold air bypass passage 28, and the hot flush of the face can be softened. .

[0007]

In the above-mentioned conventional device, the damper 29 occupies either the open or closed position by being opened and closed by the operation of the occupant, and its opening cannot be adjusted. The optimum air volume corresponding to the environmental conditions could not be blown out from the face air outlet 20 through the cold air bypass passage 28, and therefore the hot flash of the occupant's face could not be sufficiently suppressed.

[0008]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above-mentioned problems, and is characterized in that it is based on at least the detected values of a vehicle interior temperature sensor and an outside air temperature sensor. A means for calculating the hot flash degree, an opening degree determining means for determining the opening degree of the damper according to the calculated hot flash degree, and an output means for outputting the opening degree to the drive motor of the damper and driving the same. There is a damper control device provided.

The damper control device may be provided with automatic operation switching means for switching to automatic operation by means of a selection switch.

The damper control device may be provided with automatic operation switching means for switching to automatic operation when a predetermined condition is reached.

Another feature is that a temperature sensor is installed in each of an upper layer portion and a lower layer portion in a vehicle compartment, and a damper for controlling the opening degree of the damper so that the detected values of both sensors have a predetermined temperature difference. There is a control device.

Still another feature is that an occupant skin temperature detection sensor is provided and a damper control device for controlling the opening of the damper according to the detection value of the sensor is provided.

[0013]

According to the first aspect of the present invention, the hot flash degree is calculated based on at least the vehicle interior temperature and the outside air temperature, and the damper opening is determined in accordance with the calculated hot flash degree. The amount of air passing through the cold air bypass passage is adjusted by adjusting the opening.

According to the fourth aspect of the invention, the opening of the damper is controlled so that the temperature of the upper layer portion and the temperature of the lower layer portion in the vehicle compartment have a predetermined temperature difference.

In the fifth aspect of the invention, the opening degree of the damper is controlled according to the skin temperature of the occupant.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the invention is shown in FIG. The detection values of the vehicle interior temperature sensor 32, the outside air temperature sensor 33, and the solar radiation sensor 34 are input to the hotness degree calculation means 31 of the damper control device 30, and here the hotness degree of the passenger in the passenger compartment is calculated based on these detection values. Is calculated. This output is input to the opening degree determining means 35, and the opening degree of the damper 29 is determined according to the hot flash degree calculated here.

This output enters the output means 37 via the automatic operation switching means 36, and the output means 37 outputs the output to the damper motor 38 to drive the damper motor 38 to bring the damper 29 to the determined opening. When the automatic operation is selected by the selection switch 39, the damper 29 automatically becomes the predetermined opening, but the selection switch 38
When the manual operation is selected by, the damper 29 has a predetermined opening degree only when the selection switch 39 is operated to select the manual operation.

A second embodiment of the invention is shown in FIG. In the second embodiment, the operation mode selected by the mode selecting means 40 and the hot flash degree calculated by the hot flash degree calculating means 31 are input to the condition detecting means 41. The condition detecting means 41 has a predetermined condition set in advance, for example,
When the heating operation is in the foot blowout mode and the hot flashiness is equal to or higher than a predetermined value, it is output to the automatic operation switching means 48 to switch to the automatic operation. Other configurations and operations are similar to those of the first embodiment shown in FIG.

A third embodiment of the invention is shown in FIG. In the third embodiment, the detection values of the upper layer temperature sensor 42 for detecting the temperature of the upper portion of the vehicle interior and the lower layer temperature sensor 43 for detecting the temperature of the lower portion of the vehicle interior are input to the comparison means 44, where both are detected. The temperature difference is calculated. This temperature difference is input to the opening degree determining means 45, and the opening degree of the damper 29 is determined here according to this temperature difference. Other configurations and operations are similar to those of the first embodiment shown in FIG.

In the third embodiment, the upper and lower temperatures of the passenger compartment are controlled by controlling the opening of the damper 29 so that the temperature of the upper and lower layers, that is, a predetermined head cold foot heat condition is maintained. You can

A fourth embodiment of the invention is shown in FIG. In the fourth embodiment, a skin temperature detecting sensor 46 for the occupant's face using infrared rays or the like is installed in the passenger compartment, and the opening determining means 47 opens the damper 29 according to the detection value of the sensor 46. To decide. Other configurations,
The operation is similar to that of the first embodiment shown in FIG.

In the fourth embodiment, since the opening degree of the damper 29 is controlled according to the skin temperature of the occupant's face,
Hot flashes on the passenger's face can be prevented.

[0023]

According to the first aspect of the present invention, the hot degree is calculated on the basis of at least the vehicle interior temperature and the outside air temperature, and the opening degree of the damper, that is, the opening degree of the damper is calculated according to the calculated hot degree.
Since the amount of air blown from the face outlet through the cold air bypass passage can be adjusted, hot flashes on the occupant's face can be suppressed.

According to the fourth aspect of the present invention, the damper opening is controlled so that the temperature of the upper layer portion and the temperature of the lower layer portion of the vehicle compartment have a predetermined temperature difference. The passenger's comfort level can be improved by maintaining the above condition.

According to the fifth aspect of the invention, since the opening degree of the damper is controlled according to the skin temperature of the occupant, it is possible to prevent the hot flash of the occupant's face.

[Brief description of drawings]

FIG. 1 is a system diagram showing a first embodiment of the present invention.

FIG. 2 is a control block diagram showing a second embodiment of the present invention.

FIG. 3 is a control block diagram showing a third embodiment of the present invention.

FIG. 4 is a control block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a conventional vehicle air conditioner.

[Explanation of symbols]

 10 Air conditioner 17 Cooling coil 19 Heating core 20 Face blowing air 28 Cold air bypass passage 29 Damper 30 Damper controller 38 Damper motor

Claims (5)

[Claims] 1. A vehicle air conditioner having a damper installed in a cool air bypass passage for guiding air flowing through a cooling coil to a face outlet by bypassing a heater core. Means for calculating the hot flash degree based on the detected value, opening degree determining means for determining the opening degree of the damper according to the calculated hot degree, and output this opening degree to the drive motor of the damper An air conditioning system for a vehicle, comprising a damper control device having an output means for driving. 2. The vehicle air conditioner according to claim 1, wherein the damper control device is provided with automatic operation switching means for switching to automatic operation by a selection switch. 3. The vehicle air conditioner according to claim 1, wherein the damper control device is provided with an automatic operation switching means for switching to automatic operation when a predetermined condition is reached. 4. An air conditioner for a vehicle, wherein a damper is installed in a cool air bypass passage that guides air flowing through a cooling coil to a face outlet by bypassing a heater core. An air conditioner for a vehicle, comprising: a temperature sensor; and a damper control device that controls the opening of the damper so that the detection values of both sensors have a predetermined temperature difference. 5. An air conditioner for a vehicle, wherein a damper is installed in a cool air bypass passage that guides air flowing through a cooling coil to a face outlet by bypassing a heater core. An air conditioner for a vehicle, comprising: a damper control device that controls the opening degree of the damper according to the detected value of.