Vehicle air conditioning system comprising a refrigerant recovery vessel and operating method thereof

Abstract

An air conditioning system for a vehicle including a vapor compression-type refrigerating cycle and using combustible refrigerant includes a refrigerant recovery vessel in communication with a gas-liquid separator and which of recovers the combustible refrigerant by the communication with the gas-liquid separator, and a valve which controls the communication between the refrigerant recovery vessel and the gas-liquid separator in response to an external signal. When combustible refrigerant is used as refrigerant of a vapor compression-type, refrigerating cycle, leakage of the refrigerant may be reduced, minimized, or eliminated, and the recovery of the refrigerant may be carried out readily and efficiently without requiring significant changes to the system configuration.

Description

technical field [0001] The present invention relates to a vehicle air conditioning system having a vapor compression refrigeration cycle system and using a flammable refrigerant, and more particularly, to a vehicle air conditioning system having a system capable of recovering the refrigerant from the refrigeration cycle device when necessary A refrigerant recovery container in the mechanism. Background technique [0002] Known, vehicle air-conditioning systems use, for example, the Freon air compressor sold by E.I. Dupont De Nemours and Co. of Wilmington, Delaware, USA.  Refrigerant, such as HFC134a refrigerant, is used as the refrigerant of the vapor compression refrigeration cycle device. Even if the refrigerant leaks, since it is non-flammable, there is little or no risk of explosion or fire. In general, such leaks are not considered to pose a great danger. [0003] Recently, vapor compression refrigeration cycle systems using low heat transfer coefficient refrigerants...

AI Technical Summary

Problems solved by technology

In the structure described in JP'130, since a pipe is branched from the refrigeration pipe between the expansion valve and the evaporator, and since a refrigerant recovery container is connected to the branch pipe, even if the system is applied to a vehicle air conditioner system, still need to change or replace the system design and it is not easy to apply

In addition, it is not always possible to effectively recover the refrigerant by extracting the flammable refrigerant from the pipe placed between the expansion valve and the evaporator.

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