JPH11235922A - Roof setting type air conditioner for bus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make facilitating possible of inspection work or the like relating to an electric circuit component, and so that a physical burden to a worker can be reduced. SOLUTION: An electric circuit component 15 assembling various electric parts 14 relating to air conditioning control is stored in a package unit 2. This electric circuit component 15 is arranged to be opposed to an air intake port 13 in a case 2a of the package unit 2, and fixed by tightening a plurality of bolts 18 to brackets 16, 17 fixed to the case 2a. However, one end in a lengthwise direction of the electric circuit component 15 is supported able to turn with a support shaft 19 serving as the center relating to the bracket 16, by removing each bolt 18, the other end side can be lowered down in a car room from the air intake port 13 with the support shaft 19 serving as the center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a roof-mounted bus vehicle having a cooling unit mounted on a roof.

[0002]

2. Description of the Related Art Conventionally, in a roof-mounted bus vehicle air conditioner in which a cooling unit is mounted on a roof of a bus vehicle, as shown in FIG. 4, various electric components (for example, fuse, relay, amplifier, etc.) related to air conditioning control are provided. And the like are housed in the cooling unit 110. In this case, there is no need to secure a place for installing the electric circuit component 100 on the vehicle body side, so that there is an advantage that the cost can be reduced. In addition, by arranging the electric circuit component 100 so as to face the air inlet 120 that opens to the ceiling of the bus vehicle, it is possible to perform inspection from the passenger compartment through the air inlet 120.

[0003]

However, in the conventional apparatus, the inspection work of the electric circuit component 100 needs to be performed in a posture in which the worker B looks up, as shown in FIG. In this case, since the work is performed in an unreasonable posture, there is a problem that the physical load on the worker B is large. Further, although the daily inspection work can be performed from the passenger compartment, when performing a large-scale operation beyond the range of the daily inspection, it is necessary to remove the electric circuit component 100 from the cooling unit 110. In this case, since the worker goes up on the roof of the bus vehicle, there is a problem that there is a danger and work efficiency is extremely poor. The present invention has been made based on the above circumstances, and an object of the present invention is to provide a rooftop-type bus vehicle capable of easily performing inspection work and the like on electric circuit components and reducing a physical burden on an operator. It is an object of the present invention to provide an air conditioner for air conditioners.

[0004]

An electric circuit component is disposed opposite an air intake opening to a ceiling of a bus vehicle, and is lowered into a vehicle interior through the air intake. Can be. In this case, the inspection work of the electric circuit components and the like can be performed from the passenger compartment, and the inspection work does not need to be performed in a posture in which the operator looks up, and can be performed in a normal standing posture and substantially in front. As a result, the physical burden on the worker can be reduced. In addition, since electric circuit components can be lowered into the passenger compartment from the air intake, even when performing large-scale work beyond the scope of daily inspection, there is no need to bother to climb onto the roof of the bus vehicle. Since it can be performed from the interior of the vehicle, it is advantageous in terms of safety and can also improve work efficiency.

The electric circuit component has one end rotatably supported in the cooling unit, the other end detachably supported by the fixing means, and one end by removing the fixing means. As the fulcrum, the other end can be lowered from the air intake into the vehicle interior. In this case, since the inspection work or the like can be performed in a state where the electric circuit component is hung downward, for example, the daily inspection work and the like can be easily performed as compared with the conventional apparatus as described in the means of claim 1. Can be performed, and the serviceability for workers can be greatly improved.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an attached state of an electric circuit component. As shown in FIG. 2, the bus air conditioner of the present embodiment includes a package unit 2 that integrally stores functional components and the like of a refrigeration cycle excluding a refrigerant compressor 1. Mounted on the roof. The refrigeration cycle is a well-known one used for a bus air conditioner, and includes various functions such as a refrigerant compressor 1, a refrigerant condenser 4, a receiver 5, a dryer 6, an expansion valve (not shown), and a refrigerant evaporator 7. It is composed of parts (see FIG. 3). The refrigerant compressor 1 is disposed under the rear floor of the bus vehicle 3 and is driven by a traveling engine (not shown) (see FIG. 2).

The package unit 2 has a condensing unit 8 and a cooling unit 9 integrally formed. The condensing unit 8 includes the refrigerant condenser 4 and a fan 10 that blows outside air to the refrigerant condenser 4. The cooling unit 9 includes a refrigerant evaporator 7, a blower 11 that blows inside air (air in a vehicle compartment) to the refrigerant evaporator 7, and the like. The air blown to the refrigerant evaporator 7 by the blower 11 is cooled by heat exchange with a low-temperature refrigerant when passing through the refrigerant evaporator 7, and is supplied to a cold air duct 12 (see FIG. 2) in the vehicle interior, where the air is blown. 1
The air is blown into the vehicle interior from the air outlet 12a provided in the vehicle 2. Further, a rectangular air inlet 13 (see FIG. 1) is opened in the ceiling 3a of the bus vehicle 3 in which the cooling unit 9 is arranged, for example, to communicate the vehicle interior with the inside of the unit. . When the blower 11 operates, the air in the passenger compartment is introduced into the unit through the air inlet 13 and is blown to the refrigerant evaporator 7.

The package unit 2 accommodates an electric circuit component 15 in which various electric components 14 (fuses, relays, amplifiers, etc.) relating to air conditioning control are assembled. The electric circuit component 15 has a substantially rectangular planar shape, and has a slightly smaller horizontal and vertical width than the air intake 13. As shown in FIG. 1, the electric circuit component 15 is disposed in the case 2 a of the package unit 2 so as to face the air inlet 13, and the bracket 1 fixed to the case 2 a
A plurality of bolts 18 are fastened to 6 and 17 and fixed. However, the electric circuit component 15 has one end in the longitudinal direction supported rotatably about the support shaft 19 with respect to the bracket 16, and by removing each bolt 18, as shown by a two-dot chain line in FIG. The other end of the support shaft 19 can be lowered from the air inlet 13 into the vehicle interior. The harness 2 of the electric circuit component 15
0 is connected at one end side (support shaft 19 side) in the longitudinal direction (see FIG. 1).

(Operation and effect of this embodiment) In this embodiment, a plurality of bolts 18 fixing the electric circuit component 15 are removed, and the other end of the electric circuit component 15 is turned downward around the support shaft 19. By rotating, the posture of the electric circuit component 15 can be suspended from the air intake 13 into the vehicle interior as shown by the two-dot chain line in FIG. Thereby, the inspection work and the like of the electric circuit component 15 can be performed from the passenger compartment, and the inspection work does not need to be performed in a posture in which the worker A looks up, but is performed in a normal standing posture and substantially facing the front. (See FIG. 1). In this case, as compared with the conventional case in which the inspection is performed by looking up, the physical burden on the worker A can be significantly reduced, and the inspection work can be performed more easily. Performance can be greatly improved.

Since the electric circuit component 15 can be lowered into the passenger compartment from the air inlet 13, even when performing a large-scale work exceeding the range of daily inspection, the worker A needs to go up on the roof of the bus vehicle 3. However, since the work can be performed from the passenger compartment as in the case of the daily inspection, it is advantageous in terms of safety as compared with the conventional device, and the work efficiency is improved. Also, electric circuit component 1
5, the harness 20 is not hindered when the bolts 18 are removed and the electric circuit component 15 is lowered into the vehicle cabin. Therefore, when lowering the electric circuit component 15 into the vehicle interior, it is not necessary to disconnect the harness 20 one by one, and the inspection work can be performed by lowering the electric circuit component 15 into the vehicle interior with the circuit connected.

(Modification) In the present embodiment, an example is shown in which the package unit 2 in which the condensing unit 8 and the cooling unit 9 are integrally formed is mounted on the roof of the bus vehicle 3. Bus vehicle 3
It is needless to say that the present invention can also be applied to a bus air-conditioning system in which the cooling unit 9 is mounted on the roof by installing the cooling unit 9 on the roof or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an attached state of an electric circuit component.

FIG. 2 is a perspective view of a bus vehicle.

FIG. 3 is a perspective view of a package unit.

FIG. 4 is a perspective view of a package unit (prior art description).

[Explanation of symbols]

 Reference Signs List 3 bus vehicle 9 cooling unit 13 air intake 14 various electric parts 15 electric circuit component 18 bolt (fixing means)

Claims (2)

[Claims] 1. An air conditioner for a roof-mounted bus vehicle in which a cooling unit is mounted on a roof of a bus vehicle and an electric circuit component integrally assembled with various electric components related to air conditioning control is accommodated in the cooling unit. The roof-mounted bus, wherein the electric circuit component is disposed to face an air intake opening to a ceiling of the bus vehicle, and can be lowered into the vehicle interior through the air intake. Vehicle air conditioners. 2. The electric circuit component has one end rotatably supported in the cooling unit and the other end removably supported by fixing means. 2. The air conditioner for a roof-mounted bus vehicle according to claim 1, wherein the other end side can be lowered into the vehicle interior from the air intake. 3.