JPH0825947A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To shorten time to reach the comfortable temperature in a cabin by blowing off air cooled through heat exchange with cold accumulating material, into the cabin from a face blowoff port. CONSTITUTION:At the time of air-conditioning operation, air-conditioning air cooled by flowing through an evaporator 24 is blown off into a cabin 35 from a face blowoff port 31 through a cold accumulating duct 51. In the meantime, cold accumulating material built in the cold accumulating duct 51 accumulates cold through heat exchange with the air-conditioning air. When a face blowoff mode is selected to resume air-conditioning operation after stopping the operation of an air conditioner 20, air flowing through a casing 22 is blown off into the cabin 35 from the face blowoff port 31 through a duct 50. This air is cooled through heat exchange with the cold accumulating duct 51 in the process of flowing through the cold accumulating duct 51. Cold air is thereby blown off into the cabin 35 the instant the operation of the air conditioner 20 is started, so that the inside of the cabin 35 can be swiftly air-conditioned to the comfortable temperature.

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 An example of a conventional vehicle air conditioner is shown in FIG.
Is shown in. Inside the casing 22 of the air conditioner 20 mounted on the vehicle 21, a blower 23, an evaporator 24, a heater
25, air mix damper 26, blowout mode switching damper 27,
28, an inside / outside air switching damper 29, etc. are built in.

When the compressor 39 is driven from the running engine 37 via the electromagnetic clutch 38 during operation of the air conditioner 20, the gas refrigerant discharged from the compressor 39 is condensed by the condenser 40.
Then, it radiates heat to the outside air blown by the condenser fan 43 to be condensed and liquefied. This liquid refrigerant enters the receiver 41, separates the uncondensed gas refrigerant there, and then enters the expansion valve 42 where it undergoes adiabatic expansion. Next, this refrigerant enters the evaporator 24, evaporates and evaporates there, and then returns to the compressor 39.

The engine cooling water, which has been heated by cooling the running engine 37, is cooled by flowing through the heater 25 and then returned to the running engine 37.

On the other hand, when the blower 23 rotates, outside air or vehicle interior air is drawn into the casing 22 from the outside air intake port 34 or the inside air intake port 35 selected by switching the inside / outside air switching damper 29, and the blower 23 attaches the outside air or the inside air. After being energized, it is cooled by passing through the evaporator 24.

The air cooled by the evaporator 24 is diverted by the air mix damper 26, and a part of the air is mixed by the heater 25.
In the process of flowing through the heater 25, the temperature of the engine 25 is raised by exchanging heat with the engine cooling water circulating in the heater 25, and then mixed with the remaining air bypassing the heater 25 to form conditioned air at a predetermined temperature. This conditioned air is supplied to the face outlet 31, which is selected by switching the blowout mode switching dampers 27 and 28.
It is blown into the vehicle compartment 35 from the defrost outlet 32 and the foot outlet 33.

[0007]

In the conventional vehicle air conditioner 20 described above, when the winter running engine 37 is sufficiently cold, hot air is blown into the passenger compartment 35 even if the heating operation is started. It will take some time to get there.

Further, when the vehicle 21 is parked for a long time in the hot summer sun, there is a problem that it takes time for the interior of the passenger compartment 35 to reach the set temperature even if the cooling operation is started.

[0009]

The present invention has been invented to solve the above problems, and is characterized in that a cool storage duct having a cool storage material built in a duct path leading to a face outlet. Has been installed.

A cooling coil connected in parallel with the evaporator may be provided in the cold storage duct.

Another feature is that a heat storage duct containing a heat storage material is installed in the duct path leading to the foot outlet.

A heating coil for circulating engine cooling water may be provided in the heat storage duct.

[0013]

In the first aspect of the present invention, at the start of the cooling operation, the air that has passed through the evaporator and the heater is cooled by exchanging heat with the regenerator material in the process of passing through the regenerator duct, and then from the face outlet. It is blown out indoors.

In the second invention, when the heating operation is started,
The air that has passed through the evaporator and the heater is heated by exchanging heat with the heat storage material in the process of passing through the heat storage duct, and then is blown into the vehicle compartment from the foot outlet.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the invention is shown in FIG. Duct 50 connecting the casing 22 and the face outlet 31
A cool storage duct 51 containing a cool storage material is installed therein. A cooling coil 52 connected in parallel with the evaporator 24 is embedded in the cold storage duct 51.

When the electromagnetic opening / closing valve 53 is opened, a part of the refrigerant flowing out from the receiver 41 branches to enter the cooling coil 52 via the electromagnetic opening / closing valve 53 and the capillary tube 54, and when evaporating there, heat from the regenerator material is removed. After taking away and cooling this, the compressor
It is supposed to return to 39. Other configurations are similar to those of the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

However, during the summer cooling operation, the evaporator is
The conditioned air cooled by passing through 24 is blown out from the face outlet 31 into the passenger compartment 35 through the cool storage duct 51, and during this time, the cool storage material built in the cool storage duct 51 exchanges heat with the conditioned air. To store cold heat. If the electromagnetic opening / closing valve 53 is opened for 2 to 3 minutes immediately before the operation of the air conditioner 20 is stopped, sufficient cold heat can be stored in the cold storage material.

After the operation of the air conditioner 20 is stopped, when the face blowout mode is selected and the cooling operation is restarted, the casing is
The air flowing through 22 passes through the duct 50 and the face outlet 31
It is blown out from the vehicle to the passenger compartment 35, but is cooled by exchanging heat with the cool storage material contained therein while flowing through the cool storage duct 51.

Therefore, when the cooling operation of the air conditioner 20 is started even after the vehicle 21 has been parked in the hot summer weather for a long time, the cold wind is immediately blown into the vehicle interior 35, so that the vehicle interior 35
It is possible to prevent the occupants from feeling uncomfortable and to quickly cool the passenger compartment to a comfortable temperature.

A second embodiment of the invention is shown in FIG. In the second embodiment, a heat storage duct 56 containing a heat storage material is installed in a duct 55 connecting the casing 22 and the foot outlet 33. A heating coil 57 in which engine cooling water circulates is embedded in the heat storage duct 56.

When the electromagnetic on-off valve 58 is opened, the engine cooling water, which has been heated by cooling the running engine 37, is heated by heating the heat storage material while passing through the heating coil 57, and then the running engine is used. It is supposed to return to 37. Other configurations are similar to those of the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

During the winter heating operation, however, the conditioned air heated by passing through the heater 25 is blown out from the face outlet 33 into the passenger compartment 35 through the duct 55, and is contained in the heat storage duct 56 during this period. The heat storage material stores warm heat by exchanging heat with conditioned air. If the electromagnetic on-off valve 58 is opened for 2 to 3 minutes immediately before the operation of the air conditioner 20 is stopped, sufficient heat can be stored in the heat storage material.

After the operation of the air conditioner 20 is stopped, when the foot blowing mode is selected and the heating operation is restarted, the casing 22
The air that has flowed through the air is blown out from the foot outlet 33 to the passenger compartment 35 through the duct 55, and is heated by exchanging heat with the heat storage material contained therein in the process of passing through the heat storage duct 56. .

Therefore, even if the engine 37 is cooled down by parking the winter vehicle 21 for a long time, when the heating operation of the air conditioner 20 is started, warm air is instantly blown into the passenger compartment 35. Therefore, it is possible to prevent the passengers in the vehicle compartment 35 from feeling uncomfortable and to quickly heat the vehicle compartment to a comfortable temperature.

[0025]

According to the first aspect of the present invention, when the cooling operation is started, the air is cooled by exchanging heat with the regenerator material in the process of passing through the regenerator duct and then blown into the vehicle interior from the face outlet. It Therefore, even if the vehicle is parked in the hot summer weather for a long time, if the cooling operation is started, the cool air is immediately blown into the passenger compartment, which can prevent passengers' discomfort in the passenger compartment and make the passenger compartment comfortable. It can shorten the time to reach the proper temperature.

If a cooling coil connected in parallel with the evaporator is provided in the cold storage duct, sufficient cold heat can be stored in the cold storage material.

In the third aspect of the invention, the air at the start of the heating operation is heated by exchanging heat with the heat storage material in the process of passing through the heat storage duct, and then is blown into the vehicle interior from the foot outlet. Therefore, even if the engine for winter running is completely cold, when the heating operation is started, warm air is instantly blown into the passenger compartment, which can prevent the passengers from feeling uncomfortable in the passenger compartment. It can shorten the time to reach a comfortable temperature.

If a heating coil for circulating engine cooling water is provided in the heat storage duct, sufficient heat can be stored in the heat storage material.

[Brief description of drawings]

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

FIG. 2 is a schematic configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing an example of a conventional vehicle air conditioner. .

[Explanation of symbols]

 24 Evaporator 25 Heater 31 Face outlet 50 Duct 51 Cool storage duct 52 Cooling coil

Claims (4)

[Claims] 1. In a vehicle air conditioner for blowing out temperature-controlled air, which has passed through an evaporator and a heater, from a face outlet or a foot outlet into a vehicle compartment through a duct, a duct path leading to the face outlet. An air conditioner for a vehicle, characterized in that a regenerator duct having a regenerator material installed therein. 2. The vehicle air conditioner according to claim 1, wherein a cooling coil connected in parallel with the evaporator is provided in the cold storage duct. 3. In a vehicle air conditioner that blows out temperature-controlled air flowing through an evaporator and a heater from a face outlet or a foot outlet into a vehicle compartment through a duct, a duct path leading to the foot outlet. An air conditioner for a vehicle, characterized in that a heat storage duct having a built-in heat storage material is installed therein. 4. The air conditioner for a vehicle according to claim 3, wherein a heating coil for circulating engine cooling water is provided in the heat storage duct.