Test system and method for detection of air conditioning system

Abstract

The invention relates to a test system and method for detection of an air conditioning system. The test system comprises an air conditioning system to be tested, a pressure maintaining loop, a vacuum pumping loop, a refrigerant charging and recovering loop and a control unit, wherein the pressure maintaining loop, the vacuum pumping loop and the refrigerant charging and recovering loop are connected with one other in parallel, and respectively connected with a low pressure pipe interface and a high pressure pipe interface of the air conditioning system to be tested through connecting pipes; all the loops are connected in series with solenoid valves for controlling the on / off of the loops; the solenoid valves are connected with the control unit. According to the invention, the functions of pressure maintaining, vacuum pumping, refrigerant recovering and charging and the like of the air conditioning system are integrated; the equipment is simple and convenient to operate; full automatic control is achieved; the accuracy of detection data of pressure maintaining, vacuum pumping, refrigerant recovering and charging is increased.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to an air-conditioning system testing system and testing method for maintaining pressure, vacuuming, recovering and charging refrigerants for various rail vehicle air-conditioning systems. Background technique [0002] Pressure maintaining, vacuuming, and refrigerant charging of the EMU air conditioning system are the key to ensure the safety and normal operation of the air conditioning equipment. [0003] At present, after the air-conditioning system (including air-conditioning units and pipelines) of rail vehicles such as EMUs is installed, it is necessary to carry out the process of system pressure maintenance, vacuuming, recovery of residual refrigerant, and charging of new refrigerant to ensure that the system pipeline is effectively sealed and does not leak. and internal refrigerant cleaning. [0004] The current EMU air conditioning system maintains pressure, vacuumizes, recover...

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Problems solved by technology

[0005] The above technologies such as pressure maintaining, vacuuming, and charging have the following problems: First, there are many equipments used, which require nitrogen cylinders, vacuum pumps and pressure gauge devices, refrigerant charging, recovery tanks, electronic scales, etc., and the system performs pressure maintaining and pumping. Vacuum, refrigerant recovery, and charging equipment transportation is troublesome; second, system pressure maintenance, vacuuming, refrigerant recovery, and charging cannot be completed at one time, and nitrogen needs to be evacuated in the middle. It is a test parameter (such as holding pressure and time, vacuum pressure and time, refrigerant charge, etc.), which requires manual control, and the data has large human factors and low accuracy.

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