JPH05294129A - Air conditioner for special vehicle with cabin - Google Patents

Abstract

PURPOSE:To enhance mounting properties with a mounting space made small in area for an air conditioner for a special vehicle with a cabin, and thereby realize a sort of the vehicle whose height is made lowerer. CONSTITUTION:An air conditioning unit 5 which comprises those such as a blower 1, an evaporator 2 and a heater core 3 housed in a unit case 4, is set on the upper section of the engine room 11 of a vehicle with a cabin. The fan section of the blower 1 is set while being faced to the ground side in the vertical direction, and the coolant tube of the evaporator 2 is formed into a tube bent-up structure in such a way that coolant flows in the direction normal to the vertical direction, so that the unit case 4 is formed into a flattened shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner (hereinafter abbreviated as an air conditioner) for a special vehicle with a cabin.

[0002]

2. Description of the Related Art Conventional air conditioners for special vehicles with cabins include, for example, Japanese Utility Model Publication No. 57-199119 and Japanese Utility Model Publication No.
No. 1-17316 and Japanese Utility Model Laid-Open No. 63-124504, a system in which an air conditioning unit including a blower, an evaporator and the like is provided on the ceiling among air conditioning systems,
As disclosed in Japanese Utility Model Laid-Open No. 62-33914, there is a system provided in the engine room.

[0003]

Among these, the former method requires securing a space for installing the air conditioning unit on the ceiling, which increases the vehicle height. For this reason, it is difficult to reduce the height of small special vehicles with vehicle height restrictions.On the other hand, in the latter method as well, in the case of small special vehicles, because the engine room is small, air conditioning is not possible. The layout of the unit was very difficult, and it was difficult to install. In particular, even if the air conditioning unit is a small special vehicle, the capacity does not decrease in proportion to it, and it has been strongly desired to address the above problems.

The present invention has been made in view of the above points, and an object thereof is to reduce the installation space to improve the mountability,
Another object of the present invention is to provide an air conditioner capable of reducing the height of this type of special vehicle.

[0005]

In order to achieve the above object, the present invention basically proposes the following means for solving the problems.

That is, in an air conditioner of a system in which an air conditioner unit in which a blower, an evaporator, and a heater core are housed in a unit case is arranged in the upper part of an engine room of a special vehicle with a cabin, the fan portion of the blower is directed upward and downward. The refrigerant tube of the evaporator, which is installed toward the ground side, has a bent tube structure in which the refrigerant flows in a direction perpendicular to the vertical direction, and the unit case has a flattened shape.

[0007]

In order to reduce the height of the cabin, the present invention presupposes that the air conditioning unit is placed in the engine room instead of the ceiling of the cabin.

When the fan unit of the blower is directed toward the ground side with respect to the top-bottom direction of the vehicle, the space for installing the blower in the top-bottom direction may be secured by the axial length of the motor and the fan. In comparison with the conventional method in which the fan is installed vertically to the vertical direction, the installation space of the blower in the vertical direction is 1/2 or less.

Further, when the tube of the evaporator has a bent tube structure in which the refrigerant flows in a direction perpendicular to the vertical direction, the tube is extended in the horizontal direction to ensure the necessary heat transfer area, and the vertical direction is applied. (Height) can be made small and the evaporator can be made thin.

Therefore, the air-conditioning unit case for accommodating the blower, the evaporator and the like can also be made into a flattened shape, whereby the overall thickness of the air-conditioning unit can be reduced.
It is possible to install the air conditioning unit in the upper space of the engine room, which is a narrow space without difficulty.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view showing a mounting state of an air conditioner according to an embodiment of the present invention, FIG. 2 (a) is a plan view of a unit in the air conditioner, and FIG. 2 (b) is a front view. .. In this embodiment, a small vehicle with a cabin is applied.

In FIG. 1, 10 is a cabin, 11 is an engine room, and 12 is an engine. The air conditioner includes an evaporator 2, a condenser 15, and a compressor 1 which form a refrigeration cycle.
6, consisting of a pressure reducing valve (not shown), etc.
The evaporator 2 is housed in the unit case 4 together with the blower 1 and the heater core 3 to form an air conditioning unit 5.
The condenser 15 is installed in front of the radiator 14, and the electromagnetic clutch of the compressor 16 is connected to the pulley of the engine 12 via a V-belt.

Details of the air conditioning unit 5 will be described with reference to FIG.

The unit case 4 is composed of a box frame A (4a) and a box frame B (4b) which are separately molded, of which the box frame A (4a) for housing the blower 1 is lowered frontward. The box frames A (4a) and B (4b) are connected to each other via the joint 6 while being supported by the joint 6 in a slightly inclined state. The box frame B (4b) accommodates the evaporator 2 and the heater core 3.

The blower 1 is installed upside down on the box frame A (4a), of which the fan section 1a and its air intake port 1c are directed toward the ground side, and the motor 1b is located on the top side. .. According to the arrangement structure of the blower 1 as described above, the thickness (installation space) of the blower 1 in the vertical direction is equal to that of the fan 1a.
And the axial length of the motor 1b, which can be halved compared to the conventional method in which the fan is installed vertically to the vertical direction.

The box frame B (4b) is internally provided with an evaporator 2 and a heater core 3 from the upstream side. The evaporator 2 is a serpentine type, as shown in FIG. 3, and a refrigerant tube 2a.
However, it has a tube bending structure in which the refrigerant flows in a direction perpendicular to the vertical direction. The evaporator 2 having such a structure can make the evaporator 2 thin in the vertical direction while ensuring a necessary heat transfer area.

By thus reducing the thickness of the blower 1 and the evaporator 2 in the vertical direction, the unit case 4, that is, the box frames 4a and 4b are flattened.

The air conditioning unit 5 constructed as described above
1 is installed so as to be partitioned from the engine 12 via a partition member 13 in an upper space in an engine room 1 of a vehicle with a cabin as shown in FIG. The air outlet of the air conditioning unit 5 faces the inside of the cabin 10 via a flexible duct 17, and the inside air intake hole 19 on the floor side of the cabin 10 receives the accommodation space 2 of the air conditioning unit 5 via the duct 18.
It leads to 0. The suction port 1c of the blower 1 faces the accommodation space 20 toward the ground side. A part of the bonnet is provided with a door (not shown) for taking in outside air, which can be opened and closed. When the door is open, the air conditioning unit 5 can take in outside air, and the door is closed. Occasionally, the inside air is also taken into the air conditioning unit 5.

The air taken into the air conditioning unit 5 through the suction port 1c is pushed into the unit case 4 by the blower 1 and passes through the evaporator 2 and the heater core 3, and the air whose temperature is adjusted in this process is duct 17 It is blown out into the cabin 10 via.

According to the present embodiment, by arranging the air conditioning unit 5 on the engine room 11 side, the vehicle height of the entire vehicle can be lowered, and furthermore, the thickness of the blower 1 and the evaporator 2 can be reduced to make the unit case 4 smaller. Since the air conditioning unit 5 is flattened, the air conditioning unit 5 can be made thinner, and the air conditioning unit 5 can be installed in a narrow space of the engine room without difficulty.

Further, since the fan portion 1a of the blower 1 is on the ground side (lower side), there is an effect that the circulation of cooling air in the cabin in the inside air mode is improved. This has the following advantages mainly when the cooling air is blown out so as to hit the body of the occupant during the hot summer months. That is, in the case of the conventional method in which the cooler unit is provided on the ceiling, the air in the cabin is sucked in above the blowout portion, so that the blown cooling air is immediately sucked above the occupant's body. Although the cooling air is circulated locally and the cooling effect is lowered, in the case of the present embodiment, such a situation does not occur and the cooling effect can be enhanced.

Further, according to this embodiment, the box frame A (4a) on the blower 1 side is replaced with the box frame B on the evaporator 2 and heater core 3 side.
Since this can be set separately from (4b) and can be set to an arbitrary front descent angle via the joint 6, [the front descent angle of the box frame A (4a) can be changed by changing the front descent angle of the joint 6]. Is possible], and has the following advantages. That is, when an air conditioner is installed above the engine of a small special vehicle, the engine hood generally has a structure in which the hood is lowered to improve the driving visibility. The air conditioning unit can be installed accordingly.

[0024]

According to the present invention, the air conditioning unit can be made thin and can be easily installed in a narrow engine room. Therefore, it is possible to realize a low profile of a special vehicle of this type. It is possible to provide an air conditioner having excellent mountability.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an attached state of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a plan view and a front view of the air conditioning unit in the above embodiment.

FIG. 3 is a perspective view showing an example of an evaporator used in the above embodiment.

[Explanation of symbols]

1 ... Blower, 2 ... Evaporator, 2a ... Refrigerant tube, 3 ... Heater core, 4 ... Unit case, 4a, 4b ... Box frame A, B, 5 ... Air conditioning unit, 6 ... Joint, 10 ... Cabin, 11 ... Engine Room, 12 ... Engine, 17
… Blowout duct, 18… Intake air intake duct

Claims (4)

[Claims] 1. An air conditioner of a system in which an air conditioner unit comprising a blower, an evaporator, and a heater core housed in a unit case is arranged in an upper portion of an engine room of a special vehicle with a cabin, and a fan section of the blower is upside down. Installed toward the ground side of the direction, the refrigerant tube of the evaporator,
An air conditioner for a special vehicle with a cabin, characterized in that the unit case has a flattened shape as a bent tube structure in which a refrigerant flows in a direction perpendicular to the vertical direction. 2. The unit case according to claim 1, wherein the unit case includes a box frame A for housing the blower and a box frame B for housing the evaporator and the heater core, of which the box frame for housing the blower. An air conditioner for a special vehicle with a cabin, wherein the body A is installed so as to be inclined downward. 3. The box frame body A and the box frame body B are formed as separate bodies according to claim 2, and the box frame bodies A and B form a joint for supporting the box frame body A in a front-down direction. An air conditioner for a special vehicle with a cabin, characterized in that the air conditioner is connected through the air conditioner. 4. The air conditioner for a special vehicle with a cabin according to any one of claims 1 to 4, wherein the evaporator is a serpetine type evaporator.