JP2007296930A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of improving maintainability and reducing manufacturing cost. <P>SOLUTION: Evaporator units 13 are installed at the left side part and the right side part of a vehicle ceiling part. A refrigerant return pipe 25 which communicates an evaporator 18 and a compressor 11 composing respective evaporator units 13 is disposed along either one of the left side part or the right side part of the vehicle ceiling part. A refrigerant supply pipe 17 which communicates a capacitor composing the compressor 11 and the capacitor unit 12 is disposed along the side where the refrigerant return pipe 25 of the left side part or the right side part of the vehicle ceiling part is not disposed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner mounted on a vehicle such as a route bus.

As a vehicle air conditioner mounted on a vehicle such as a route bus, for example, there is one having a configuration disclosed in Patent Document 1.
JP 2001-1745 A

  In a vehicle such as a route bus, the space of the ceiling portion of the passenger compartment is narrow, and both the refrigerant supply pipe and the refrigerant return pipe cannot be disposed in this space. Therefore, the refrigerant supply pipe and / or the refrigerant return pipe are disposed in the cooler duct. However, there is a problem that the maintainability is lowered and the manufacturing cost is increased.

  Recently, in order to improve the maintainability of the evaporator unit, one evaporator unit is installed on each of the left side and the right side of the ceiling portion of the vehicle, and the evaporator and the compressor of each evaporator unit are Some are connected via refrigerant return pipes. Even in such an air conditioner for a vehicle, both the refrigerant supply pipe and the refrigerant return pipe are disposed on either side of the vehicle, causing the above-described problems.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle air conditioner that can improve maintainability and can reduce manufacturing costs.

The present invention employs the following means in order to solve the above problems.
A vehicle air conditioner according to the present invention includes a compressor that compresses refrigerant, a condenser unit that has a function of condensing and liquefying high-temperature and high-pressure gas refrigerant discharged from the compressor, and dissipating heat to outside air. An expansion valve that decompresses and expands the refrigerant to be converted into a low-temperature and low-pressure refrigerant, and an evaporator unit that has a function of evaporating and evaporating the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve to remove heat from the air in the vehicle; A refrigerant return pipe for connecting the evaporator and the compressor constituting each evaporator unit, wherein the evaporator unit is installed on each of the left side and the right side of the vehicle ceiling portion. Is disposed along either the left side or the right side of the vehicle ceiling, and the compressor and Coolant supply pipe for communicating the capacitor constituting the serial capacitor unit are arranged along a direction which the refrigerant return pipe of the left portion or right portion of the vehicle ceiling portion is not disposed.
According to such a vehicle air conditioner, the refrigerant supply pipe is provided on either the left side or the right side of the vehicle ceiling part (the ceiling part of the passenger compartment), and the refrigerant return on the left side or the right side of the vehicle ceiling part. Refrigerant return pipes can be accommodated on the side where the pipe is not arranged, and it is not necessary to accommodate the refrigerant supply pipe or the refrigerant return pipe in the cooler duct. Can be reduced.

According to the vehicle air conditioner, it is more preferable that the refrigerant return pipe and the refrigerant supply pipe are arranged one by one.
According to such a vehicle air conditioner, since the refrigerant supply pipe and the refrigerant return pipe are arranged one by one, the maintainability can be further improved and the manufacturing cost can be reduced. Can be further planned.
Further, since the total length of the refrigerant pipe is minimized, the weight of the entire apparatus can be reduced, the number of bodywork steps can be reduced, and the manufacturing cost can be reduced.

The vehicle by this invention is equipped with the said air conditioning apparatus for vehicles.
According to such a vehicle, the weight of the entire device is reduced and the weight of the entire vehicle is reduced, so that the fuel consumption of the vehicle can be reduced.

  According to the vehicle air conditioner of the present invention, it is possible to improve the maintainability and to reduce the manufacturing cost.

Hereinafter, an embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic perspective view of a vehicle (for example, a route bus) 1 on which a vehicle air conditioner 10 according to this embodiment is mounted. FIG. 2 is a perspective view of a main part of the vehicle air conditioner 10 according to this embodiment. FIG. 3 is a schematic cross-sectional view of an evaporator unit.
The vehicle air conditioner 10 includes a compressor (compressor) 11 (not shown), a condenser unit 12, an expansion valve (not shown), and an evaporator unit 13 as main elements.
In FIG. 1, reference numeral 2 denotes a windshield, and reference numeral 3 denotes a passenger entrance.

  The compressor 11 compresses a low-temperature / low-pressure gaseous refrigerant into a high-temperature / high-pressure gaseous refrigerant, and a driving source (main engine) 15 (or a main engine) 15 for traveling the vehicle 1 via a V-belt 14 or the like. It is driven by a drive source (sub engine) dedicated to the air conditioner.

As shown in FIG. 1, the condenser unit 12 is installed on a roof R located in front of the vehicle 1, and includes a condenser (outdoor heat exchanger) (not shown) and a condenser fan 16.
The condenser is disposed in the center of the front of the vehicle 1 and has a flat box shape (a rectangular parallelepiped) having a function of condensing and liquefying the high-temperature and high-pressure gas refrigerant discharged from the compressor 11 to the air outside the vehicle (outside air). Structure).
The condenser fan 16 is for increasing the amount of air sucked into the condenser, and is disposed on both sides of the condenser and in the vicinity of the downstream side, and the operation of the condenser fan 16 causes the gas refrigerant in the condenser to be liquefied. It will be promoted more.
The compressor 11 and the condenser are connected via a refrigerant supply pipe 17, and the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 11 is supplied to the condenser through the refrigerant supply pipe 17. It has become. The refrigerant supply pipe 17 is provided on the right side of the ceiling portion of the passenger compartment 21 along the front-rear direction of the vehicle 1.

  The expansion valve depressurizes and expands the refrigerant passing through it to form a low-temperature and low-pressure refrigerant.

  As shown in FIG. 1, one evaporator unit 13 is provided on the ceiling portion of the passenger compartment 21 located on the center side in the width direction of the vehicle 1 with respect to the condenser fan 16, and one on each of the left side portion and the right side portion of the vehicle 1. is set up. As shown in FIG. 3, each evaporator unit 13 includes an evaporator (indoor heat exchanger) 18 and a cold air blower 19 and is housed in a cooler duct 20.

The evaporator 18 is a flat box-like (cuboid) structure having a function of evaporating and evaporating the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve and taking heat away from the air (inside air) in the vehicle.
The cold air blower 19 is a rotary blower such as a sirocco fan having a fan rotated by an electric motor, and a discharge duct 19 a of the cold air blower 19 is open to the cooler duct 20.
The cooler duct 20 is provided on both side portions (left side portion and right side portion) of the ceiling portion of the passenger compartment 21 along the front-rear direction of the vehicle 1, and each cooler duct 20 has a central passage in the passenger compartment 21. A large number of air outlets 22 for blowing cold air laterally toward the upper portion and a large number of air outlets 23 for blowing cold air downward toward the passenger's seat are provided.
In addition, the code | symbol 24 in FIG. 3 is an internal air intake.

  As shown in FIG. 1, the evaporator 18 disposed on the left side of the vehicle 1 and the compressor 11 are connected via a refrigerant return pipe 25, and the evaporator 18 disposed on the right side of the vehicle 1 and the vehicle The refrigerant return pipe 25 located in the vicinity of the outlet of the evaporator 18 disposed on the left side of 1 is connected via a second refrigerant return pipe 26 and a junction pipe 27. Then, the low-temperature and low-pressure gaseous refrigerant evaporated by the evaporator 18 disposed on the left side of the vehicle 1 is returned to the compressor 11 through the refrigerant return pipe 25 and is disposed on the right side of the vehicle 1. The low-temperature and low-pressure gaseous refrigerant evaporated in step 1 is returned to the compressor 11 through the second refrigerant return pipe 26, the junction pipe 27, and the refrigerant return pipe 25.

The refrigerant return pipe 25 is provided along the front-rear direction of the vehicle 1 on the left side of the ceiling portion of the passenger compartment 21.
As shown in FIGS. 1 and 2, the second refrigerant return pipe 26 extends vertically upward from the vicinity of the outlet of the evaporator 18 disposed on the right side of the vehicle 1 and penetrates the roof R of the vehicle 1. An evaporator disposed on the left side of the vehicle 1 extends vertically upward near the exit of the evaporator 18 disposed on the left side of the vehicle 1 and then extends vertically downward to penetrate the roof R of the vehicle 1. After being bent toward the junction pipe 27 provided in the vicinity of the outlet 18, it is connected to the junction pipe 27. The second refrigerant return pipe 26 that penetrates the roof R of the vehicle 1 and is outside the vehicle is accommodated in the condenser unit 12 disposed on the roof R of the vehicle 1.

According to the vehicle air conditioner 10 according to the present embodiment, the refrigerant supply pipe 17 is provided on the right side of the ceiling part of the passenger compartment 21, and the refrigerant return pipe 25 is provided on the left side of the ceiling part of the passenger compartment 21. Since it can be accommodated and the refrigerant supply pipe 17 or the refrigerant return pipe 25 does not need to be accommodated in the cooler duct 20, the maintainability can be improved and the manufacturing cost can be reduced.
Further, since the total length of the refrigerant pipe is minimized, the weight of the entire apparatus can be reduced, the number of bodywork steps can be reduced, and the manufacturing cost can be reduced.
Furthermore, according to the vehicle 1 equipped with the vehicle air conditioner 10 according to the present embodiment, the weight of the entire device is reduced and the weight of the entire vehicle is reduced, so that the fuel consumption of the vehicle 1 is improved. Can do.

It is a schematic perspective view of the vehicle carrying the vehicle air conditioner which concerns on one Embodiment of this invention. It is a principal part perspective view of the air conditioning apparatus for vehicles shown in FIG. It is a schematic sectional drawing of an evaporator unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Vehicle air conditioner 11 Compressor 12 Condenser unit 13 Evaporator unit 17 Refrigerant supply pipe 18 Evaporator 21 Car compartment 25 Refrigerant return pipe

Claims (3)

A compressor for compressing the refrigerant;
A condenser unit having a function of condensing and liquefying the high-temperature and high-pressure gas refrigerant discharged from the compressor and radiating heat to the air outside the vehicle;
An expansion valve that depressurizes and expands the refrigerant that passes through it into a low-temperature and low-pressure refrigerant;
A vehicle air conditioner comprising: an evaporator unit having a function of evaporating and evaporating low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve, and removing heat from the air in the vehicle;
The evaporator unit is installed on the left side and the right side of the vehicle ceiling part,
A refrigerant return pipe that communicates the evaporator and the compressor constituting each evaporator unit is disposed along either the left side or the right side of the vehicle ceiling, and
The refrigerant supply pipe that communicates the compressor and the condenser that constitutes the condenser unit is arranged along a direction in which the refrigerant return pipe on the left side or the right side of the vehicle ceiling portion is not arranged. A vehicle air conditioner.   The vehicle air conditioner according to claim 1, wherein the refrigerant return pipe and the refrigerant supply pipe are arranged one by one.   A vehicle comprising the vehicle air conditioner according to claim 1.

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