Vehicle air conditioner

A technology for air-conditioning devices and vehicles, which is applied to electrical devices, power devices, and vehicle components, and can solve problems such as oil circulation rate decline and oil retention

Pending Publication Date: 2020-10-13
SANDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the volume on the high-pressure side between the branch portion and the solenoid valve on the side of the cooling expansion valve increases as described above, a large amount of oil will remain and the oil circulation rate (OCR) will decrease.

Method used

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  • Vehicle air conditioner
  • Vehicle air conditioner
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. figure 1 It is a configuration diagram showing a vehicle air conditioner 1 according to an embodiment of the present invention. The vehicle to which the embodiment of the vehicle air conditioner 1 of the present invention is applied is an electric vehicle (EV) without an engine (internal combustion engine), and a battery 55 (such as a lithium battery) is mounted on the vehicle. Electric power charged by an external power source such as normal charging) to the battery 55 is supplied to an electric motor (not shown) for traveling to drive the vehicle to travel. In addition, the vehicle air conditioner 1 of the present invention mounted on a vehicle is also powered by the battery 55 and driven.

[0042] That is, the air conditioner 1 for a vehicle performs the heating operation by the heat pump operation using the refrigerant circuit R in an electric vehicle incapable of ...

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PUM

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Abstract

The invention provides a vehicle air conditioner which prevents reduction in the oil circulation rate in a cooling circuit when adjusting the battery temperature and which can prevent reduction in compressor reliability. A battery temperature adjustment device 61 comprises a refrigerant-heat medium heat exchanger 64, branch piping 72 which extends from a branch member B2 to the refrigerant-heat medium heat exchanger, and an auxiliary expansion valve 73 which is provided in the branch piping and which is for reducing pressure of the refrigerant flowing into the refrigerant-heat medium heat exchanger. An in-cabin expansion valve 8 is arranged in refrigerant piping 13B, nearer to the branching member B2 than to the heat absorber 9, and the auxiliary expansion valve 73 is arranged in the branching piping 72, nearer to the branching member B2 than to the refrigerant-heat medium heat exchanger.

Description

technical field [0001] The present invention relates to a heat pump type air conditioner for conditioning the air in a vehicle interior, and more particularly to a vehicle air conditioner suitable for electric vehicles and hybrid vehicles equipped with batteries. Background technique [0002] Due to the emergence of environmental problems in recent years, vehicles such as hybrid cars and electric cars that drive a traveling motor with electric power supplied from a battery have become popular. In addition, as an air conditioner (refrigeration cycle device) applicable to such a vehicle, a refrigerant circuit including a compressor, a condenser, an expansion valve for cooling air, an indoor evaporator, etc. has been developed, and the electric power supplied from the battery is utilized. An air conditioner that drives a compressor. [0003] In addition, the battery is difficult to charge and discharge in a high-temperature state or an extremely low-temperature state, and also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/22B60K1/04B60K11/04B60L1/00B60L3/00F25B1/00F25B5/02B60H1/32B60H3/00
CPCB60H1/22B60H1/32B60H3/00B60K1/04B60K11/04B60L3/00B60L1/00F25B1/00F25B5/02
Inventor 石关彻也户山贵司关口和树
Owner SANDEN CORP
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