JPH0516803A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To use a ventilation device for fresh air supply during heating time in winter, and supply a sufficient amount of fresh air into a cabin at such a small amount of air to prevent from giving an uncomfortable feeling to passengers. CONSTITUTION:An air amount variable type fan 2 is used as a cooling fan, and a damper 3 for cutting off return air RA from a cabin is provided. When the air amount variable type fan 2 is operated with the damper 3 kept in a fully closed condition and a cooler 19 inoperative, only fresh air from the outside is taken in and supplied into the cabin through a blower port 18. Besides, the air amount at the air amount, variable type fan 2 at this time is set so small that fresh air may not give an uncomfortable feeling to passengers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a railway vehicle,
The present invention relates to a vehicle air conditioner that cools return air from inside the vehicle and fresh air outside the vehicle and supplies the cooled air to the inside of the vehicle.

[0002]

2. Description of the Related Art FIG. 2 is a schematic configuration diagram of a conventional vehicle air conditioner (12) (hereinafter simply referred to as an air conditioner (12)) mounted on a roof of a vehicle (11).

As shown in the figure, outside air intakes (14) are provided on both sides of a housing (13) of the air conditioner (12), and a fresh filter (14) is provided at the outside air intake (14). 15) and the hood (16) are attached.

Return ports (17) are provided at both left and right ends of the bottom of the casing (13), and a blower port (18) is provided at the center of the bottom of the casing (13). . The return ports (17) are return ducts (11a) provided at both left and right ends of the ceiling of the vehicle (11).
The blower port (18) is connected to a blower duct (11b) provided at the center of the ceiling of the vehicle (11).

Two coolers (19) are arranged in the housing (13) so as to separate the return port (17) and the blower port (18), and the two coolers are cooled. A cooling fan (20) having a large air volume is arranged between the air conditioners (19) in a state of being connected to the blower port (18).

In the air conditioner (12) having the above-mentioned structure, the return air (RA) from the inside of the vehicle is operated from the return port (17) through the return duct (11a) and outside the vehicle by operating the cooling fan (20). Fresh air (FA) is taken in through the outside air intake (14), and the return air (RA) and fresh air (FA) are passed together through a cooler (19) to form cooling air (CA), which is then blown. The air is supplied from the mouth (18) into the vehicle through the air duct (11b). As a result, the inside of the vehicle can be cooled, and at the same time, fresh air can be sent into the inside of the vehicle.

[0007]

However, in the above conventional air conditioner (12), in order to supply fresh air (FA) into the vehicle during heating in winter, the cooling fan (19) does not function but the cooling fan ( When 20) is activated, the warm return air (RA) from the inside of the vehicle and the cold fresh air (FA) outside the vehicle, which is lower in temperature than the inside of the vehicle,
The passenger's head and face are vigorously sprayed, which causes the passenger to feel uncomfortable. Therefore, conventionally, in addition to the air conditioner (12), a vehicle is equipped with a ventilator provided with a ventilation fan having a smaller air volume than the cooling fan (20) of the air conditioner (12) for supplying fresh air during winter heating. I had to do it.

As described above, the conventional air conditioner (12) has a drawback that it can be used only as a cooling device although it costs a lot of time and money to manufacture and install.

A vehicle cooling device has been proposed, which uses a variable air volume fan as the cooling fan (20) to reduce the air volume during winter heating and supply fresh air (FA) into the vehicle. (JP-A-59-96
055), if the air volume of the cooling fan (20) is simply reduced, the fresh air (FA) and the return air (R)
Since it is sent together with A), fresh air (FA) cannot be sufficiently supplied.

The present invention has been made to eliminate the above-mentioned drawbacks, and can be used as a ventilation device for supplying fresh air even during heating in winter, and has a small air volume that does not cause passenger discomfort. An object of the present invention is to provide a vehicle air conditioner capable of sufficiently supplying fresh air into the vehicle.

[0011]

In order to achieve the above object, in a vehicle air conditioner according to the present invention, a variable air volume fan is used as a cooling fan, and a damper for shutting off return air from the inside of the vehicle is provided. Provided.

[0012]

In the above structure, when the damper is fully closed and the variable air volume fan is operated with the function of the cooler stopped, the return air from the inside of the vehicle is not taken into the air conditioner, Only fresh air outside the vehicle is taken in and supplied from the air outlet through the air duct to the inside of the vehicle. In addition, the air volume of the variable air volume fan at this time
Set it small so that fresh air does not cause passenger discomfort. Even when the air volume of the variable air volume type fan is reduced in this way, the fresh air can be sufficiently supplied to the vehicle because the damper blocks the return air from the vehicle and only the fresh air is taken in.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to the present invention mounted on a vehicle roof. Note that, in FIG. 1, constituent elements that are not different from the conventional example shown in FIG.

A vehicle air conditioner according to the present invention (1)
The feature of the air conditioner (hereinafter, simply referred to as the air conditioner (1)) is that the housing (1
3) A variable air volume type fan (2) is used as a cooling fan to be placed inside, and return air (R
This is because a damper (3) for shutting off A) is provided.

The air volume variable type fan (2) is constructed so that the air volume can be changed by using a motor whose rotation speed is variable, for example, a pole number conversion type motor.

Further, the damper (3) is constructed so that it can be electrically or manually switched between a completely opened and fully opened state and a completely closed and fully closed state. In the case of the example, it is attached to the return port (17) of the housing (13). The damper (3) may be attached at any position as long as it can completely block the return air (RA) from the inside of the vehicle, for example, inside the return duct (11a) of the vehicle (11).

Next, the operation of the air conditioner (1) having the above structure will be described.

By making the damper (3) fully open, increasing the air volume of the variable air volume fan (2), and making the cooler (19) function, the air conditioner (1) can be operated in a conventional air conditioner. Like the device, it can be operated as a cooling device.

That is, when the variable air volume fan (2) is operated, the return air (RA) from the inside of the vehicle and the fresh air (FA) outside the vehicle are discharged from the return port (17) and the outside air intake port (14). Each of them is taken in, passed through a cooler (19) together, made into cooling air (CA), and supplied into the vehicle from a blower port (18) through a blower duct (11b). At this time, the air volume of the variable air volume fan (2) is set to be large so that the inside of the vehicle can be sufficiently cooled, as in the case of the conventional air conditioner. As a result, the inside of the vehicle can be cooled, and at the same time, fresh air can be sent into the inside of the vehicle.

On the other hand, the damper (3) is fully closed and the air volume of the variable air volume fan (2) is reduced,
Further, by stopping the function of the cooler (19), the air conditioner (1) can be operated as a ventilation device for supplying fresh air during winter heating.

That is, when the damper (3) is fully closed and the return port (17) is closed, when the variable air volume fan (2) is operated, the return air (R
A) is not taken into the air conditioner (1), only fresh air (FA) outside the vehicle is taken in, and the air outlet (1)
8) The air is supplied into the vehicle through the air duct (11b). Further, the air volume of the variable air volume fan (2) at this time is set to a small value so that low temperature fresh air (FA) supplied from the air outlet (18) to the inside of the vehicle being heated does not cause passenger discomfort. .

As described above, the air conditioner (1) according to the present invention is used not only as a cooling device but also during winter heating.
It can also be operated as a ventilation device for supplying fresh air. Moreover, when operating as a ventilator, even if the air volume of the variable air volume fan (2) is reduced, the damper (3) shuts off the return air (RA) from the inside of the vehicle and takes in only fresh air (FA). In addition, fresh air (FA) can be sufficiently supplied into the vehicle.

[0024]

As described above, according to the vehicle air conditioner of the present invention, even when the vehicle is heated in winter, the air conditioner is used as a ventilation device for supplying fresh air, and has a small air volume that does not cause passenger discomfort. Therefore, fresh air can be sufficiently supplied into the vehicle.

As a result, it is not necessary to separately install a ventilation device in the vehicle, the cost and time required for manufacturing the vehicle are saved, and the vehicle weight is reduced, so that energy consumption during traveling can be reduced. it can.

[Brief description of drawings]

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

FIG. 2 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

 (1) Air conditioner for vehicle (2) Variable air volume fan (3) Damper (11) Vehicle (11a) Return duct (11b) Blower duct (13) Housing (14) Outside air intake (17) Return port ( 18) Blower (19) Cooler (CA) Cooling air (FA) Fresh air (RA) Return air

Claims (1)

Claim: What is claimed is: 1. A cooler and a cooling device in a housing provided with a return port connected to a return duct of a vehicle, a ventilation port connected to a ventilation duct of the vehicle, and an outside air intake port. By arranging a fan and operating the cooling fan, the return air from the inside of the vehicle is taken in from the above-mentioned return port, the fresh air outside the vehicle is taken in from the outside air intake, and those return air and fresh air are taken in. In a vehicle air conditioner that supplies cooling air through the cooler to the inside of the vehicle through the air outlet, a variable air volume fan is used as the cooling fan, and a damper that blocks return air from the inside of the vehicle is provided. A vehicle air conditioner characterized by the above.