JP3879230B2 - Air-conditioner for roof-mounted bus vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof-mounted bus vehicle air conditioner having a cooling unit mounted on a roof.
[0002]
[Prior art]
Conventionally, in a roof-mounted bus vehicle air conditioner in which a cooling unit is mounted on the roof of a bus vehicle, as shown in FIG. 4, various electric parts (for example, fuses, relays, amplifiers, etc.) related to air conditioning control are integrated. In some cases, the electric circuit component 100 assembled in the cooling unit 110 is accommodated 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 there is an advantage that the cost can be reduced. In addition, by disposing the electric circuit component 100 so as to face the air intake 120 that opens in the ceiling of the bus vehicle, it is possible to inspect from the passenger compartment through the air intake 120.
[0003]
[Problems to be solved by the invention]
However, in the conventional apparatus, it is necessary to perform the inspection work of the electric circuit component 100 in a posture in which the operator B looks up as shown in FIG. This is because the work is performed with an unreasonable posture, and there is a problem that the physical burden on the worker B is large. Moreover, although daily inspection work can be performed from the passenger compartment, when a large-scale operation exceeding the range of daily inspection is performed, 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 its purpose is a roof-mounted bus vehicle that can easily perform inspection work on electric circuit components and reduce physical burden on workers. It is to provide an air-conditioning apparatus.
[0004]
[Means for Solving the Problems]
(Means of Claim 1)
Electrical circuit components, so as to face the air intake opening in the ceiling of the bus fleet is disposed above the air intake Rutotomoni, the size of the planar shape facing the air inlet is smaller than an air intake And one end is rotatably supported in the cooling unit, the other end is detachably supported by a fixing means, and the other end side is taken as a fulcrum from the air intake port by removing the fixing means. Can be hung . In this case, the inspection work of the electric circuit components can be performed from the passenger compartment, and the inspection work does not need to be performed in an attitude where the operator looks up upward, and can be performed in a normal standing position facing substantially front. As a result, the physical burden on the worker can be reduced. In addition, since electrical circuit components can be suspended from the air intake into the passenger compartment, even when performing large-scale work that exceeds the scope of daily inspection, there is no need to bother to go up on the roof of the bus vehicle. Therefore, it is advantageous from the viewpoint of safety, work efficiency can be improved, and serviceability for workers can be greatly improved.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a mounting 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 accommodates functional parts of the refrigeration cycle excluding the refrigerant compressor 1, and this package unit 2 is connected to the bus vehicle 3. It is mounted on the roof.
A refrigeration cycle is a well-known thing used for a bus air conditioner, and each function of refrigerant compressor 1, refrigerant condenser 4, receiver 5, dryer 6, expansion valve (not shown), refrigerant evaporator 7, etc. It consists of parts (see FIG. 3). The refrigerant compressor 1 is disposed below the rear floor of the bus vehicle 3 and is driven by a travel engine (not shown) (see FIG. 2).
[0007]
The package unit 2 is configured by integrating a condensing unit 8 and a cooling unit 9.
The condensing unit 8 includes a 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 and a blower 11 that blows the inside air (air in the vehicle interior) to the refrigerant evaporator 7. The air blown to the refrigerant evaporator 7 by the blower 11 is cooled by heat exchange with the low-temperature refrigerant when passing through the refrigerant evaporator 7 and supplied to the cold air duct 12 (see FIG. 2) in the passenger compartment. 12 is blown out into the passenger compartment through an air outlet 12a provided in the vehicle. In addition, an air intake 13 (see FIG. 1) formed in, for example, a rectangular shape opens in the ceiling 3a of the bus vehicle 3 in which the cooling unit 9 is disposed, so that the vehicle interior communicates with the inside of the unit. . When the blower 11 is activated, the air in the passenger compartment is introduced into the unit through the air intake port 13 and blown to the refrigerant evaporator 7.
[0008]
The package unit 2 accommodates an electric circuit component 15 in which various electric parts 14 (fuses, relays, amplifiers, etc.) related to air conditioning control are assembled.
The electric circuit component 15 is provided with a substantially rectangular planar shape, and both its horizontal width and vertical width are slightly smaller than the air intake port 13. As shown in FIG. 1, the electric circuit component 15 is disposed in the case 2a of the package unit 2 so as to face the air intake port 13, and a plurality of bolts 18 are fastened to brackets 16 and 17 fixed to the case 2a. Is fixed. However, the electrical circuit component 15 is supported so that one end in the longitudinal direction is rotatable 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 side of the support shaft 19 can be lowered from the air intake 13 into the vehicle interior.
In addition, the harness 20 of the electric circuit component 15 is connected on one end side (support shaft 19 side) in the longitudinal direction (see FIG. 1).
[0009]
(Operation and effect of this embodiment)
In the present embodiment, a plurality of bolts 18 fixing the electric circuit component 15 are removed, and the other end side of the electric circuit component 15 is rotated downward about the support shaft 19 to obtain a two-dot chain line in FIG. As shown, the electrical circuit component 15 can be suspended from the air intake 13 into the vehicle compartment. Thereby, the inspection work 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 where the worker A looks up, and is performed in a normal standing posture and facing substantially front. (See FIG. 1). In this case, compared with the conventional case where the inspection is performed while looking up, the physical burden on the worker A can be greatly reduced, and the inspection operation can be performed more easily. Can greatly improve performance.
[0010]
Since the electric circuit component 15 can be lowered from the air intake port 13 into the passenger compartment, even when a large-scale work exceeding the range of daily inspection is performed, it is not necessary for the worker A to go up on the roof of the bus vehicle 3. Since the work can be performed from the passenger compartment as in the daily inspection, it is advantageous in terms of safety as compared with the conventional apparatus, and the work efficiency is also improved.
Moreover, since the harness 20 of the electric circuit component 15 is connected on the support shaft 19 side, the harness 20 does not become an obstacle when the bolts 18 are removed and the electric circuit component 15 is lowered into the passenger compartment. Therefore, when the electric circuit component 15 is lowered into the vehicle interior, it is not necessary to disconnect the harness 20 one by one, and the electric circuit component 15 can be lowered into the vehicle interior while being connected to the vehicle to perform inspection work.
[0011]
(Modification)
In the present embodiment, an example 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 is shown, but the condensing unit 8 is placed under the floor of the bus vehicle 3 or the like. Needless to say, the present invention can also be applied to a bus air conditioner in which only the cooling unit 9 is installed on the roof.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mounting 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 (explanation of prior art).
[Explanation of symbols]
3 Bus vehicle 9 Cooling unit 13 Air intake 14 Various electric parts 15 Electric circuit component 18 Bolt (fixing means)

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 in which various electric parts related to air conditioning control are integrally assembled is accommodated in the cooling unit,
The electric circuit component is disposed above the air intake facing the air intake opening in the ceiling of the bus vehicle, and the size of the planar shape facing the air intake is the air intake One end is rotatably supported in the cooling unit, the other end is detachably supported by a fixing means, and the other end with the one end as a fulcrum by removing the fixing means. A roof-mounted bus vehicle air conditioner characterized in that the side can be suspended from the air intake port into the vehicle interior .

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