JP2007302031A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner capable of preventing the entry of oil into a condenser, and improving cooling ability and cooling efficiency. <P>SOLUTION: The vehicular air conditioner 10 is provided with a compressor 11 compressing a refrigerant, a condenser unit 12 with the condenser 17 condensing and liquefying high temperature high pressure gas refrigerant discharged from the compressor 11 and radiating heat to air outside the vehicle, an expansion valve 13 depressing/expanding the refrigerant passing inside to make it into a low temperature/low pressure refrigerant, and an evaporator unit 14 with an evaporator 22 evaporating and vaporizing the low temperature low pressure liquid refrigerant passed through the expansion valve 13 and drawing heat from the air in the vehicle. An oil separator 20 is built in the condenser unit 12 on the upstream side of the condenser 17. <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 vehicles such as route buses, the space in the engine room that houses the drive source that drives the compressor (such as the main engine for driving the vehicle or the sub-engine dedicated to the air conditioner) is small, and an oil separator cannot be installed. There is a problem in that oil (lubricating oil) enters the condenser and cooling capacity and cooling efficiency decrease.

  The present invention has been made in view of the above circumstances, and provides a vehicle air conditioner that can prevent the infiltration of oil into a condenser and can improve cooling capacity and cooling efficiency. It is an object.

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 includes a condenser that condenses and liquefies high-temperature and high-pressure gas refrigerant discharged from the compressor, and dissipates heat to air outside the vehicle, and passes through the interior. An expansion valve having an evaporator that depressurizes and expands the refrigerant to be converted into a low-temperature and low-pressure refrigerant, and an evaporator that evaporates and evaporates the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve to remove heat from the air in the vehicle; The air conditioner for vehicles is equipped with an oil separator built in the condenser unit and upstream of the condenser.
According to such a vehicle air conditioner, for example, since the oil separator is built in the capacitor unit installed on the roof of the vehicle, the space in the engine room in which the drive source for driving the compressor is housed. The oil separator can be mounted regardless of whether the oil (lubricating oil) can be prevented from entering the condenser, and the cooling capacity and cooling efficiency can be improved.

In the vehicle air conditioner, the condenser unit and the evaporator unit are arranged adjacent to each other, and an oil return pipe connected to the oil separator is a refrigerant return pipe located near the outlet of the evaporator. It is more preferable that they are connected.
According to such a vehicle air conditioner, the condenser unit and the evaporator unit are disposed adjacent to each other, and the length of the oil return pipe is minimized, so that the weight of the entire apparatus can be reduced. In addition, the number of bodywork steps can be reduced, and the manufacturing cost can be reduced.

A vehicle air conditioner according to the present invention includes a compressor that compresses refrigerant, a condenser unit that includes a condenser that condenses and liquefies high-temperature and high-pressure gas refrigerant discharged from the compressor, and dissipates heat to air outside the vehicle, and passes through the interior. An expansion valve having an evaporator that depressurizes and expands the refrigerant to be converted into a low-temperature and low-pressure refrigerant, and an evaporator that evaporates and evaporates the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve to remove heat from the air in the vehicle; An air conditioner for a vehicle having an oil separator built in the evaporator unit and upstream of the condenser.
According to such a vehicle air conditioner, for example, the oil separator is incorporated in the evaporator unit installed behind the vehicle and above the engine room in which the drive source for driving the compressor is housed. As a result, an oil separator can be installed regardless of the space in the engine room that houses the drive source that drives the compressor, preventing oil (lubricating oil) from entering the condenser, and cooling capacity. In addition, the cooling efficiency can be improved.

In the above vehicle air conditioner, it is more preferable that the oil return pipe connected to the oil separator is connected to a refrigerant return pipe located in the vicinity of the outlet of the evaporator.
According to such a vehicle air conditioner, since the oil separator is built in the evaporator unit and the length of the oil return pipe is minimized, the weight of the entire apparatus can be reduced, and The number of man-hours can be reduced, and the manufacturing cost can be reduced.

In the vehicle air conditioner, it is more preferable that the oil return pipe is arranged in parallel along the refrigerant return pipe.
According to such a vehicle air conditioner, pressure loss due to oil adhering to the inner wall surface of the refrigerant return pipe can be reduced, so that a reduction in the capacity of the compressor can be prevented, and the cooling capacity and cooling capacity can be prevented. Efficiency can be improved.
In addition, since the oil whose temperature has been lowered is sucked into the compressor, heat transfer between the refrigerant and the oil in the compressor is reduced, and the compression efficiency is improved by approaching adiabatic compression. be able to.

In the vehicle air conditioner, a reheat heat exchanger is disposed adjacent to the evaporator, and a part of the oil return pipe is configured to pass through the reheat heat exchanger. And more preferably.
According to such a vehicle air conditioner, since warm oil passes through the inside of the reheat heat exchanger, the air that has passed through the evaporator (or the air that has passed through) can be warmed and passed through the evaporator. The dehumidified air (or passing air) can be dehumidified.

The vehicle by this invention is equipped with the said air conditioning apparatus for vehicles.
According to such a vehicle, the vehicle interior is efficiently cooled, so that the fuel consumption of the vehicle can be improved.

  According to the vehicle air conditioner of the present invention, it is possible to prevent the oil from entering the condenser and to improve the cooling capacity and the cooling efficiency.

A vehicle air conditioner according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a schematic overall perspective view of a vehicle (for example, a route bus) 1 on which a vehicle air conditioner 10 according to this embodiment is mounted, and FIG. 2 is a schematic configuration diagram of the vehicle air conditioner 10 according to this embodiment.
The vehicle air conditioner 10 includes a compressor (compressor) 11, a condenser unit 12, an expansion valve 13, and an evaporator unit 14 as main elements.
In FIG. 1, reference numeral 1a is a windshield, and reference numeral 1b is a door for getting on and off the driver.

  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) 16 (or a main engine) 16 for traveling the vehicle 1 via a V-belt 15 or the like. It is driven by a drive source (sub engine) dedicated to the air conditioner.

As shown in FIG. 1, the capacitor unit 12 is installed on a roof R located in front of the vehicle 1, and includes a condenser (outdoor heat exchanger) 17 (see FIG. 2) and a condenser fan 18. I have.
The condenser 17 is disposed in the front center portion of the vehicle 1 and has a flat box shape (with 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) ( A rectangular parallelepiped structure.
The condenser fan 18 is for increasing the amount of air sucked into the condenser 17, and is disposed on both sides of the condenser 17 and in the vicinity of the downstream side, and the gas refrigerant in the condenser 17 is activated by the operation of the condenser fan 18. Liquefaction will be further promoted.

The compressor 11 and the condenser 17 are connected via a refrigerant supply pipe 19, and the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 11 is supplied to the condenser 17 through the refrigerant supply pipe 19. It has become. In addition, an oil separator (oil separation) that separates oil (lubricating oil) from the gaseous refrigerant discharged from the compressor 11 is provided in the refrigerant supply pipe 19 located inside the condenser unit 12 and upstream of the condenser 17. 20) is provided. Then, the oil separated by the oil separator 20 passes through an oil return pipe (for example, a pipe having an outer diameter of 9.52 mm) 21 and an evaporator 22 (in this embodiment, the evaporator 22 disposed on the right side of the vehicle 1). Is returned to a refrigerant return pipe 23 (for example, a pipe having an outer diameter of 31.75 mm) located in the vicinity of the outlet.
Note that the refrigerant supply pipe 19 is provided, for example, on the right side portion of the ceiling portion of the passenger compartment 24 along the front-rear direction of the vehicle 1.

  As shown in FIG. 1, the evaporator unit 14 is provided on the ceiling portion of the passenger compartment 24 located on the center side in the width direction of the vehicle 1 with respect to the condenser fan 18, and on each of the left side portion and the right side portion of the vehicle 1 is set up. Each evaporator unit 14 includes an evaporator (indoor heat exchanger) 22 (see FIG. 2) and a cold air blower (not shown), and is housed in a cooler duct (not shown).

The evaporator 22 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 is a rotary blower such as a sirocco fan having a fan that is rotated by an electric motor, and a discharge duct of the cold air blower opens to the cooler duct.
The cooler duct is provided on both sides (left side and right side) of the ceiling portion of the vehicle compartment 24 along the front-rear direction of the vehicle 1, and each cooler duct includes an upper portion of the central passage in the vehicle compartment 24. A large number of air outlets (not shown) for blowing cold air in the lateral direction toward the vehicle and a large number of air outlets (not shown) for blowing the cold air downward toward the passenger's seat are provided.

  As shown in FIG. 2, the capacitor 17 and the evaporator 22 are connected via a refrigerant pipe 25. A refrigerant pipe 25 located inside the capacitor unit 12 and on the downstream side of the capacitor 17 is provided with a receiver (liquid receiver) 26 for temporarily storing the liquid refrigerant condensed and liquefied by the capacitor 17. Yes. The refrigerant pipe 25 located inside the evaporator unit 14 and upstream of the evaporator 22 is provided with an expansion valve 13 that decompresses and expands the refrigerant passing through the refrigerant pipe 25 to form a low-temperature and low-pressure refrigerant. ing.

On the other hand, as shown in FIGS. 1 and 2, the evaporator 22 and the compressor 11 are connected via a refrigerant return pipe 23, and the low-temperature and low-pressure gaseous refrigerant evaporated and evaporated by the evaporator 22 is supplied to the refrigerant return pipe. 23 and returned to the compressor 11.
In addition, the refrigerant | coolant return pipe | tube 23 is provided in the left side part of the ceiling part of the compartment 24 so that the front-back direction of the vehicle 1 may be followed.

According to the vehicle air conditioner 10 according to the present embodiment, since the oil separator 20 is built in the capacitor unit 12 installed on the roof R of the vehicle 1, a drive source for driving the compressor 11 is accommodated. The oil separator 20 can be mounted regardless of the space in the engine room, so that oil (lubricating oil) can be prevented from entering the condenser 17 and the cooling capacity and cooling efficiency can be improved. .
Moreover, since the capacitor unit 12 and the evaporator unit 14 are disposed adjacent to each other and the length of the oil return pipe 21 is minimized, the weight of the entire apparatus can be reduced and the number of bodywork steps can be reduced. Therefore, the manufacturing cost can be reduced.

  According to the vehicle 1 equipped with the vehicle air conditioner 10 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle 1 can be improved.

  A vehicle air conditioner according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic overall perspective view of a vehicle (for example, a route bus) 2 on which the vehicle air conditioner 30 according to this embodiment is mounted.

As shown in FIG. 3, the vehicle air conditioner 30 according to the present embodiment is the same as that of the first embodiment described above in that an integrated unit 31 is provided instead of the capacitor unit 12 and the evaporator unit 14. Different. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above.

  The integrated unit 31 is a unit in which the capacitor unit 12 and the evaporator unit 14 described in the first embodiment are integrated, and a drive source for driving the compressor 11 is housed behind the vehicle 2. Located above the engine room.

According to the vehicle air conditioner 30 according to the present embodiment, the oil separator 20 is installed in the integrated unit 31 installed behind the vehicle 2 and above the engine room in which the drive source for driving the compressor 11 is housed. The oil separator 20 can be mounted regardless of the space of the engine room in which the drive source for driving the compressor 11 is housed, and the oil (lubricating oil) can be prevented from entering the condenser 17. It is possible to improve the cooling capacity and the cooling efficiency.
Moreover, since the capacitor unit 12 and the evaporator unit 14 are disposed adjacent to each other and the length of the oil return pipe 21 is minimized, the weight of the entire apparatus can be reduced and the number of bodywork steps can be reduced. Therefore, the manufacturing cost can be reduced.

  According to the vehicle 2 equipped with the vehicle air conditioner 30 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle 2 can be improved.

  A third embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIGS. 4 and 5. 4 is a schematic overall perspective view of a vehicle (for example, a route bus) 3 on which the vehicle air conditioner 40 according to the present embodiment is mounted, and FIG. 5 is a schematic configuration diagram of the vehicle air conditioner 40 according to the present embodiment.

As shown in FIG. 4, in the vehicle air conditioner 40 according to this embodiment, the evaporator unit 14 is disposed behind the vehicle 3 and above the engine room in which the drive source for driving the compressor 11 is housed. This is different from the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above.

  As shown in FIG. 5, an oil separator 20 is provided inside the evaporator unit 14, and the oil separated by the oil separator 20 is located in the vicinity of the outlet of the evaporator 22 through an oil return pipe 21. The refrigerant is returned to the refrigerant return pipe 23.

According to the vehicle air conditioner 40 according to the present embodiment, the oil separator 20 is disposed in the evaporator unit 14 installed behind the vehicle 3 and above the engine room in which the drive source for driving the compressor 11 is housed. Since it is built in, the oil separator 20 can be mounted regardless of the space in the engine room in which the drive source for driving the compressor 11 is housed, and the oil (lubricating oil) can be prevented from entering the condenser 17. In addition, the cooling capacity and the cooling efficiency can be improved.
Further, since the oil separator 20 is built in the evaporator unit 14 and the length of the oil return pipe 21 is minimized, the weight of the entire apparatus can be reduced, and the number of bodywork steps can be reduced. Thus, the manufacturing cost can be reduced.

  According to the vehicle 3 equipped with the vehicle air conditioner 40 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle 3 can be improved.

  A vehicle air conditioner according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic overall perspective view of a vehicle (for example, a route bus) 4 on which the vehicle air conditioner 50 according to this embodiment is mounted.

As shown in FIG. 6, the vehicle air conditioner 50 according to the present embodiment includes a condenser unit 12 at the rear of the vehicle 4 and the side of the engine room in which the drive source for driving the compressor 11 is housed (this book In the embodiment, it is different from that of the third embodiment described above in that it is arranged on the right side). Since other components are the same as those of the third embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as 3rd Embodiment mentioned above.

According to the vehicle air conditioner 50 according to the present embodiment, the oil separator 20 is disposed in the evaporator unit 14 installed behind the vehicle 4 and above the engine room in which the drive source for driving the compressor 11 is housed. Since it is built in, the oil separator 20 can be mounted regardless of the space in the engine room in which the drive source for driving the compressor 11 is housed, and the oil (lubricating oil) can be prevented from entering the condenser 17. In addition, the cooling capacity and the cooling efficiency can be improved.
Further, since the oil separator 20 is built in the evaporator unit 14 and the length of the oil return pipe 21 is minimized, the weight of the entire apparatus can be reduced, and the number of bodywork steps can be reduced. Thus, the manufacturing cost can be reduced.

  According to the vehicle 4 equipped with the vehicle air conditioner 50 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle 4 can be improved.

  5th Embodiment of the vehicle air conditioner which concerns on this invention is described, referring FIG. 7 and FIG. FIG. 7 is a schematic overall perspective view of a vehicle (for example, route bus) 5 on which the vehicle air conditioner 60 according to the present embodiment is mounted, and FIG. 8 is a schematic configuration diagram of the vehicle air conditioner 60 according to the present embodiment.

As shown in FIGS. 7 and 8, the vehicle air conditioner 60 in the present embodiment is the same as that of the first embodiment described above in that the oil return pipe 21 is arranged in parallel along the refrigerant return pipe 23. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above.

  The oil return pipe 21 is adjacently disposed along the refrigerant return pipe 23 from the vicinity of the outlet of the evaporator 22 of the evaporator unit 14 (in the present embodiment, the evaporator 22 disposed on the right side of the vehicle 5) to the vicinity of the inlet of the compressor 11. Heat exchange is performed between the oil passing through the oil return pipe 21 and the refrigerant passing through the refrigerant return pipe 23, so that the oil whose temperature has dropped is the inlet side (suction side) of the compressor 11. ).

According to the vehicle air conditioner 60 according to the present embodiment, the oil separator 20 is disposed in the evaporator unit 14 installed behind the vehicle 5 and above the engine room in which the drive source for driving the compressor 11 is housed. Since it is built in, the oil separator 20 can be mounted regardless of the space in the engine room in which the drive source for driving the compressor 11 is housed, and the oil (lubricating oil) can be prevented from entering the condenser 17. In addition, the cooling capacity and the cooling efficiency can be improved.
Moreover, since the pressure loss by oil adhering to the inner wall face of the refrigerant | coolant return pipe 23 can be reduced, the capability fall of the compressor 11 can be prevented and the cooling capability and the cooling efficiency can be improved.
Furthermore, since the oil whose temperature has decreased is sucked into the compressor 11, heat transfer between the refrigerant and the oil in the compressor 11 is reduced, approaching adiabatic compression, and compression efficiency is improved. Can be improved.

  According to the vehicle 5 equipped with the vehicle air conditioner 60 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle 5 can be improved.

  A vehicle air conditioner according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a schematic overall perspective view of a vehicle (for example, a route bus) 6 on which the vehicle air conditioner 70 according to this embodiment is mounted.

As shown in FIG. 9, the vehicle air conditioner 70 according to the present embodiment is different from that of the second embodiment described above in that the oil return pipe 21 is arranged in parallel along the refrigerant return pipe 23. . Since other components are the same as those of the second embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as 2nd Embodiment mentioned above.

  The oil return pipe 21 is adjacently disposed along the refrigerant return pipe 23 from the vicinity of the outlet of the evaporator 22 of the evaporator unit 14 to the vicinity of the inlet of the compressor 11, and the oil passing through the oil return pipe 21 and the refrigerant return Heat exchange is performed with the refrigerant passing through the inside of the pipe 23, and the oil whose temperature has been lowered is returned to the inlet side (suction side) of the compressor 11.

According to the vehicle air conditioner 70 according to the present embodiment, the oil separator 20 is installed in the integrated unit 31 installed behind the vehicle 6 and above the engine room in which the drive source for driving the compressor 11 is housed. The oil separator 20 can be mounted regardless of the space of the engine room in which the drive source for driving the compressor 11 is housed, and the oil (lubricating oil) can be prevented from entering the condenser 17. It is possible to improve the cooling capacity and the cooling efficiency.
Moreover, since the pressure loss by oil adhering to the inner wall face of the refrigerant | coolant return pipe 23 can be reduced, the capability fall of the compressor 11 can be prevented and the cooling capability and the cooling efficiency can be improved.
Furthermore, since the oil whose temperature has decreased is sucked into the compressor 11, heat transfer between the refrigerant and the oil in the compressor 11 is reduced, approaching adiabatic compression, and compression efficiency is improved. Can be improved.

  According to the vehicle 6 equipped with the vehicle air conditioner 70 according to the present embodiment, the inside of the passenger compartment 24 is efficiently cooled, so that the fuel consumption of the vehicle 6 can be improved.

  A seventh embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIG. FIG. 10 is a schematic configuration diagram of a vehicle air conditioner 80 in the present embodiment.

As shown in FIG. 10, in the vehicle air conditioner 80 according to the present embodiment, a reheat (reheat) heat exchanger 81 is disposed adjacent to the evaporator 22, and the interior of the reheat heat exchanger 81 is disposed inside. It differs from the thing of embodiment mentioned above by the point comprised so that the oil isolate | separated with the oil separator 20 may pass. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the same component as embodiment mentioned above.

The reheat heat exchanger 81 is a heat exchanger adjacently disposed in the vicinity of the evaporator 22, and a part of the oil return pipe 21 passes through the inside thereof. The warm oil that passes through the oil return pipe 21 warms the air that has passed through the evaporator 22 (or the air that passes through it).
The oil return pipe 21 located on the downstream side of the reheat heat exchanger 81 is provided with a variable throttle 82, and the oil return pipe 21 located on the upstream side is provided with an electromagnetic valve 83.
Further, a bypass pipe 84 that bypasses the reheat heat exchanger 81 is connected to the oil return pipe 21, and an electromagnetic valve 85 is provided in the middle of the bypass pipe 84.
The variable throttle 82 is controlled to be fully opened when the solenoid valve 83 is closed and the solenoid valve 85 is opened, so that the oil adhering to the inside of the reheat heat exchanger 81 is removed from the solenoid valve 82 and the refrigerant return pipe. 23 is recovered by the compressor 11 via 23.

According to the vehicle air conditioner 80 according to the present embodiment, since the oil separator 20 is installed in a place other than the engine room where the drive source for driving the compressor 11 is stored, the drive source for driving the compressor 11 is stored. The oil separator 20 can be mounted regardless of the space in the engine room, and the infiltration of oil (lubricating oil) into the condenser 17 can be prevented, and the cooling capacity and cooling efficiency can be improved. it can.
Moreover, since the warm oil passes through the inside of the reheat heat exchanger 81 by opening the electromagnetic valve 83, the air that has passed through the evaporator 22 (or the air that has passed through) can be warmed and pass through the evaporator 22. The dehumidified air (or passing air) can be dehumidified.

  According to the vehicle equipped with the vehicle air conditioner 80 according to the present embodiment, the interior of the passenger compartment 24 is efficiently cooled, so that the fuel efficiency of the vehicle can be improved.

1 is a schematic overall perspective view of a vehicle equipped with a vehicle air conditioner according to a first embodiment of the present invention. It is a schematic block diagram of the vehicle air conditioner shown in FIG. It is a general | schematic whole perspective view of the vehicle carrying the vehicle air conditioner which concerns on 2nd Embodiment of this invention. It is a general | schematic whole perspective view of the vehicle carrying the vehicle air conditioner which concerns on 3rd Embodiment of this invention. It is a schematic block diagram of the vehicle air conditioner shown in FIG. It is a general | schematic whole perspective view of the vehicle carrying the vehicle air conditioner which concerns on 3rd Embodiment of this invention. It is a general | schematic whole perspective view of the vehicle carrying the vehicle air conditioner which concerns on 4th Embodiment of this invention. It is a schematic block diagram of the vehicle air conditioner shown in FIG. It is a general | schematic whole perspective view of the vehicle carrying the vehicle air conditioner which concerns on 5th Embodiment of this invention. It is a schematic block diagram of the vehicle air conditioner which concerns on 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Vehicle 3 Vehicle 4 Vehicle 5 Vehicle 6 Vehicle 10 Air conditioning apparatus 11 for vehicles Compressor (compressor)
12 condenser unit 13 expansion valve 14 evaporator unit 17 condenser 20 oil separator 21 oil return pipe 22 evaporator 23 refrigerant return pipe 30 vehicle air conditioner 40 vehicle air conditioner 50 vehicle air conditioner 60 vehicle air conditioner 70 vehicle Air conditioner 80 for vehicles Air conditioner 81 for vehicles Reheat heat exchanger

Claims (7)

A compressor for compressing the refrigerant;
A condenser unit comprising a condenser that condenses and liquefies the high-temperature and high-pressure gas refrigerant discharged from the compressor and dissipates 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 including an evaporator that evaporates and vaporizes the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve, and takes heat away from the air in the vehicle;
An air conditioner for a vehicle, wherein an oil separator is built in the capacitor unit and upstream of the capacitor.   The condenser unit and the evaporator unit are disposed adjacent to each other, and an oil return pipe connected to the oil separator is connected to a refrigerant return pipe located in the vicinity of the outlet of the evaporator. The vehicle air conditioner according to claim 1. A compressor for compressing the refrigerant;
A condenser unit comprising a condenser that condenses and liquefies the high-temperature and high-pressure gas refrigerant discharged from the compressor and dissipates 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 including an evaporator that evaporates and vaporizes the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve, and takes heat away from the air in the vehicle;
An air conditioner for a vehicle, wherein an oil separator is built in the evaporator unit and upstream of the condenser.   4. The vehicle air conditioner according to claim 3, wherein an oil return pipe connected to the oil separator is connected to a refrigerant return pipe located in the vicinity of an outlet of the evaporator.   The vehicle air conditioner according to claim 2 or 4, wherein the oil return pipe is arranged in parallel along the refrigerant return pipe.   The reheat heat exchanger is disposed adjacent to the evaporator, and a part of the oil return pipe is configured to pass through the inside of the reheat heat exchanger. , 4, 5. The vehicle air conditioner according to claim 1.   A vehicle comprising the vehicle air conditioner according to any one of claims 1 to 6.

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