Refrigerant leakage early warning method for railway vehicle air conditioning unit

Abstract

The invention provides a refrigerant leakage early warning method for a railway vehicle air conditioning unit.Refrigerant leakage early warning in the train operation process can be achieved through a big data model, early warning can be reported at the initial stage of refrigerant leakage, and fault maintenance is changed into pre-diagnosis detection maintenance, so that the risk that other parts are damaged due to excessive refrigerant leakage of the air conditioning system can be reduced, the risk that passenger complaints are caused due to passenger room comfort reduction caused by insufficient air conditioning refrigerating capacity due to refrigerant leakage can be avoided, sufficient time can be reserved for train dispatching to arrange and maintain a train, and faults are prevented from being reported when the train runs on the main track. Therefore, the main track operation failure rate of the train is reduced, the on-line rate of the train is increased, the passenger satisfaction is improved, the operation efficiency is improved, and the labor cost and material cost of operation departments are saved.

Description

technical field [0001] The invention relates to the technical field of rail vehicle air-conditioning units, in particular to a method for early warning of refrigerant leakage of rail vehicle air-conditioning units. Background technique [0002] The refrigeration circuit of the rail train air-conditioning unit is composed of compressors, condensers, electronic expansion valves, evaporators and other main components, which are connected by brazing of copper tubes to form a closed refrigeration system. [0003] When the air conditioner unit is cooling, in the refrigeration circuit, the compressor compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure superheated gas into the condenser, and the external air and the condenser are forced to exchange heat through the condensing fan to condense into liquid. The liquid in the condenser enters the evaporator through throttling and reducing the pressure of the electronic expansion va...

AI Technical Summary

Problems solved by technology

Because such failures cannot be predicted in advance, the original operation plan of the operating company will be disrupted after the failure occurs, and vehicles need to be temporarily allocated to replace the operation, which increases the difficulty of vehicle allocation, increases the risk of vehicle delays, affects the train on-line rate, and reduces operational efficiency

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