Pressure adjustment device of vehicle air conditioner

Abstract

The invention relates to the technical field of air conditioners, and in particular relates to a pressure adjustment device for a vehicle air conditioner. The device consists of a pipeline gas flow direction control part, a gas recovery and storage part and a refrigerant filling part. The pressure adjustment device provided by the invention freely adjusts working pressure of the vehicle air conditioner, and also has simple adjustment steps and high efficiency; when the working pressure of the vehicle air conditioner is low, refrigerant is not recovered completely during adjustment, and then vacuumizing, oiling and refrigerant refilling are performed, so that time and resources are saved; and when the working pressure of the vehicle air conditioner is high, refrigerant is not discharged during adjustment to avoid resources wasting and environmental pollution.

Description

Technical field [0001] The present invention relates to the technical field of vehicle air conditioners, in particular to a vehicle air conditioner pressure adjusting device. Background technique [0002] When the vehicle air-conditioning refrigeration system is operating, the system can be divided into two parts, high pressure and low pressure. The part between the evaporator and the compressor suction port is called the low pressure part; the part between the compressor discharge port and the condenser is called High voltage part. Both high-voltage and low-voltage parts have corresponding standard service interfaces. If the air conditioning system is operating normally, the pressure values ​​of the high and low pressure parts are relatively stable. If the pressure values ​​of the high pressure and low pressure parts are different from the normal values, it means that there is a problem with the system or the R134a refrigerant. In other words, when a vehicle air conditioner f...

AI Technical Summary

Problems solved by technology

The current vehicle air-conditioning refrigeration system is not absolutely closed, in which the compressor, condenser, evaporator, dry filter liquid receiver, expansion valve and pipelines and other components form the refrigerant circulation system, and the connections of the components are checkable or impossible. The existence of gaps will inevitably cause leakage of R134a refrigerant in the air conditioning system, thereby affecting the cooling effect of the air conditioning system; less, it also affects the cooling effect of the air conditioning system. The existing treatment method is: when the amount of R134a refrigerant is too much, release part of the R134a refrigerant into the atmosphere, so that the pressure adjustment is a waste of resources and pollutes the environment; when the amount of R134a refrigerant is too small , needs to be recovered again, vacuumized, replenished with lubricating oil, filled with R134a refrigerant, etc., so the pressure adjustment steps are complicated and inefficient

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