JPH07205644A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To save time for the attachment/detachment and storage of a cover, and locally expose a desired position to a cold air by providing an air intake on the upper section of the case to cover a coldness accumulating unit and a cold air outflow opening to the lower section of the case and providing an opening/closing louver at the cold air outflow opening. CONSTITUTION:A slit interior air intake is provided to the front upper section of a case to cover a cool accumulating unit 3, and a long sideways cold air outflow opening is provided to the front lower section of the case 4. Louvers 7 which open/close the cold air outflow opening and rotate in normal and reverse directions around a horizontal axis 8 are provided in the cold air outflow opening. Hereby, interior air is prevented to flow inside the case 4 by closing the louvers 7 so that cool is prevented to be released from the cool accumulating unit 3. Therefore, the air intake and the cold air outflow opening are opened during cool releasing operation so that a nap room is cooled by the escaped cold air, and a driver's feeling is improved by exposing a local section only to the cold air without attaching/detaching a cover every time in cool accumulation/cool releasing operation.

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 having a cool storage unit for cooling a nap room.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional air conditioner for a vehicle of this type. A main cooling unit A having a main air conditioning evaporator 25, a blower 26, etc. is installed in the lower portion of the instrument panel, and a cold storage evaporator 29 is cooled in a nap chamber 51 formed at the rear of the cabin 50. A cool storage unit B having a cool storage material 28 and the like is installed.

A clutch 20 from a running engine (not shown)
The refrigerant discharged from the compressor 21 driven via the condenser enters the condenser 22 and radiates heat to the outside to be condensed and liquefied. This liquid refrigerant branches via the receiver 23, and most of it is adiabatically expanded by the expansion valve 24, and then the main air conditioning evaporator.
After cooling the air in the vehicle compartment at 25, the air is evaporated, and then returns to the compressor 21 through the pressure regulating valve 17.

The other branched one is adiabatically expanded by an expansion valve 27, and then evaporated by cooling the regenerator material 28 by a regenerator evaporator 29, merges with the refrigerant flowing out of the pressure regulating valve 17 and is sucked into the compressor 21. To be done.

By adjusting the set pressure of the pressure adjusting valve 17, the amount of refrigerant flowing into the cold storage evaporator 29 is adjusted. In FIG. 7, 52 is a curtain, 56 is a drain pan, 57
Is a drain hose.

[0006]

In the above conventional apparatus, the cover is covered during the cold storage operation to prevent cooling from the cold storage unit B, and the cover is removed during the cold storage operation. Not only is it difficult to put on and take off, but it also takes a lot of time to store the removed cover. Further, during the cooling operation, it was not possible to apply cold air only to the desired local parts such as the head and feet of the occupant in the nap room 51 during the nap.

[0007]

The present invention has been invented to solve the above-mentioned problems, and its gist is to provide a cool storage unit having a cool storage evaporator and a cool storage material cooled by the cool storage evaporator. In a vehicle air conditioner for cooling a nap room in a cabin by a case, a case for covering the cold storage unit is provided, an air intake is provided at an upper portion of the case, and a cold airflow outlet is provided at a lower portion, and the cold airflow outlet is provided. The air conditioner for a vehicle is characterized in that a louver for opening and closing the louver is provided.

The indoor air intake can be slit-shaped.

A louver for opening and closing the indoor air intake can be provided at the indoor air intake.

It is possible to divide the cold air flow outlet into a plurality along the horizontal direction, and provide a plurality of divided cold air flow outlets with louvers for independently opening and closing them.

[0011]

In the present invention, since the cold airflow outlet is closed and the room air does not flow into the case, it is not discharged from the cold storage unit. Since the air intake and the cold airflow outlet are opened during the cooling operation, the indoor air enters the case from the air intake and is cooled by exchanging heat with the cold storage unit in the case to become cool air, and from the cold airflow outlet. Spill out and cool the nap room.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIGS. In FIG. 1, reference numeral 3 denotes a panel-shaped cold storage unit, in which a cold storage evaporator 1 and a cold storage material 2 surrounding the cold storage evaporator 1 are contained in a rectangular plate-shaped container 13. The cold storage unit 3 is covered with a case 4, a slit-like indoor air intake 5 is provided substantially horizontally in the upper front portion of the case 4, and is substantially horizontal in the lower front portion. A horizontally long cold air flow outlet 6 that extends horizontally is provided.

A louver 7 for opening and closing the cold air outlet 6 is provided rotatably around a horizontal axis 8.
In FIG. 1, 9 is a drain pan, 10 is a drain hose, 11 is a heat insulating material, and 12 is a mounting plate.

The regenerator A thus constructed is
As shown in FIG. 2, the truck is installed substantially horizontally in the middle of the rear wall H of the nap room C formed in the rear portion of the cabin B of the truck. In FIG. 2, D is the curtain, E is the driver's seat,
F is a steering wheel, and G is a nap bed.

FIG. 3 shows a refrigerant circuit. The gas refrigerant discharged from the compressor 31 driven through the clutch 30 by the running engine (not shown) is condensed in the condenser 32. The liquid refrigerant is branched through the receiver 33, most of which is adiabatically expanded by the expansion valve 34 and then evaporated by cooling the vehicle interior air by the main air conditioning evaporator 35, and then the pressure control valve.
Return to compressor 31 through 39.

The other branch is adiabatically expanded by a capillary tube 37 through an electromagnetic on-off valve 36, and then evaporated by cooling the regenerator material 2 by the regenerator 1 and joins the refrigerant flowing out from the pressure regulating valve 39. And is sucked into the compressor 31.

The amount of refrigerant flowing into the cold storage evaporator 1 is adjusted by adjusting the set pressure of the pressure adjusting valve 39. When the electromagnetic opening / closing valve 36 is closed, the refrigerant does not flow into the cold storage evaporator 1.

However, when the cooling load during summer daytime is large, the electromagnetic on-off valve 36 is closed, and the entire amount of the refrigerant discharged from the compressor 31 flows through the main air-conditioning evaporator 32. The air inside the vehicle compartment is cooled by the evaporator 32 for air conditioning.

When the night-time cooling load becomes small, the electromagnetic storage valve 36 is opened to perform the cold storage operation. During this cold storage operation, the refrigerant flows through the main air conditioning evaporator 32 and the cold storage evaporator 1. The cold storage material 2 stores cold heat by exchanging heat with the refrigerant flowing through the cold storage evaporator 1 and being cooled to change its phase to become a solid. At this time, since the cold airflow outlet 6 of the case 4 is closed by the louver 7, the room air does not circulate in the case 4, and therefore, the cool storage unit 3 does not cool the room air.

The driver parks the truck in the early morning and the driver takes a nap C
When taking a nap inside, the cooling operation is performed. During this cooling operation, the engine is stopped. The cold air flow outlet 6 is opened by opening the louver 7. Then, the vehicle interior air enters the case 4 through the air intake port 5 and is cooled by heat transfer and radiation from the cool storage unit 3 in the process of descending along the cool storage unit 3 to become cool air.

This cold air flows out from the cold airflow outlet 6 into the nap chamber C by natural convection to cool the nap chamber C and suppress its temperature rise for a certain time (for example, 2 hours). By this cooling, the cold storage material 2 undergoes a phase change and returns to a gel state.

During this cooling operation, the moisture in the room air condensed on the surface of the cold storage unit 3 becomes a drain, which drops into the drain pan 9 and is discharged through the drain hose 10.

In the above embodiment, the cold air flow outlet 6 is closed during the cold storage operation, but as shown in FIG.
An upper door 43 that pivots around an axis 41 to open and close the air intake 42 is provided in the upper part of the above, and a lower door 46 that pivots around an axis 44 to open and close the cold air outlet 45 is provided in the lower part of the case 4. ,
During the cold storage operation, both the upper door 43 and the lower door 46 can be closed, and the juice can 47 can be stored in the case 4 to be refrigerated.

Further, as shown in FIGS. 5 (A) and 5 (B), the cold air flow outlet 6 is divided into a plurality of parts in the horizontal direction, and the plurality of divided cold air flow outlets 6a to 6g are respectively provided with independent parts. It is also possible to provide louvers 7a to 7g for opening and closing. In this way, the bed G in the nap room C can apply the cool air only to the desired local parts such as the driver's head and feet during the nap.

Further, as shown in FIG. 6, a slit-shaped air inlet 5A may be provided in place of the air inlet 5.

[0026]

According to the present invention, since the cold air flow outlet is closed by the louver, the room air does not flow into the case, and therefore the cool air is not discharged from the cool storage unit. Since the air intake and the cold airflow outlet are opened during the cooling operation, the indoor air enters the case from the air intake and is cooled by exchanging heat with the cold storage unit in the case to become cool air, and from the cold airflow outlet. Spill out and cool the nap room. As a result, it is not necessary to cover the cold storage unit with the cover or remove the cover each time the cold storage operation and the cold discharge operation are performed as in the conventional case, and it is not necessary to store the removed cover.

If the cold airflow outlet is divided into a plurality of parts along the horizontal direction, and a louver for independently opening and closing each of the divided cold airflow outlets is provided, a local portion of the driver during a nap. Since the cool air can be applied to only the target part to cool it, the driver's feeling can be improved.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (A) is an external perspective view of a regenerator, and (B) is a sectional view taken along line BB of (A).

FIG. 2 is a schematic side view showing an installation procedure of the cold storage device.

FIG. 3 is a refrigerant circuit diagram of the vehicle air conditioner according to the above embodiment.

FIG. 4 is a sectional view of a cool storage device according to a second embodiment of the present invention.

FIG. 5 shows a third embodiment of the present invention, and (A) and (B) are external perspective views of a cold storage device.

FIG. 6 is an external perspective view of a cool storage device according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a conventional vehicle air conditioner.

[Explanation of symbols]

 3 Cooling storage unit 1 Cooling evaporator 2 Cooling material 4 Case 5 Air intake 6 Cold air flow outlet 7 Louver

Front page continuation (72) Inventor Hiroshi Kanazawa 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya City Mitsubishi Heavy Industries, Ltd. Nagoya Research Laboratory (72) Inventor Akira Yoshikoshi 1 Takamichi, Iwatsuka-machi, Nakamura-ku, Nagoya Mitsubishi Heavy Industries Nagoya Research Institute Co., Ltd. (72) Inventor Masashi Inoue 3-chome, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi Mitsubishi Heavy Industries, Ltd. Air Conditioning Factory

Claims (4)

[Claims] 1. In a vehicle air conditioner for cooling a nap room in a cabin by a cool storage unit having a cool storage evaporator and a cool storage material cooled by the cool storage evaporator, a case for covering the cool storage unit is provided, and an upper part of the case is provided. An air intake on the bottom and a cold air outlet on the bottom, and
An air conditioner for a vehicle, comprising a louver for opening and closing the cold air outlet. 2. The vehicle air conditioner according to claim 1, wherein the air intake has a slit shape. 3. The air conditioner for a vehicle according to claim 1, wherein a louver for opening and closing the air inlet is provided at the air inlet. 4. The cold air outlet is divided into a plurality in the horizontal direction, and a plurality of divided cold air outlets are provided with louvers for opening and closing them independently. 1. The vehicle air conditioner according to 1.