Compressor control method of rail vehicle variable-frequency air conditioner

Abstract

The invention discloses a compressor control method of a variable frequency air conditioner of a railway vehicle. During startup and shutdown control, the temperature difference is used as a judgmentcondition, and the total running time or the continuous running time is added as a judgment condition, so that the compressor can be started immediately, capacity output can be performed quickly, thetarget temperature in the passenger room can be reached quickly, and matching of startup and shutdown of the compressor and actual requirements in the passenger room is realized; when the operation frequency is controlled, the duration time is also increased as a judgment condition; the operation frequency of the compressor is continuously adjusted according to the change of the heat load in the passenger room; the output capacity of the air conditioner is optimal; the actual temperature in the passenger room is always stabilized within the range of + / -1 DEG C of the indoor target temperature,so that the phenomenon of passenger room temperature fluctuation caused by frequent opening and closing of the compressor can be reduced, the passenger room is more comfortable and energy-saving, meanwhile, the operation frequency of the compressor is matched with the actual requirement in the passenger room, and the influence on the service life of the compressor is reduced.

Description

technical field [0001] The invention belongs to the technical field of vehicle air conditioner control, and in particular relates to a method for controlling a compressor of a rail vehicle frequency conversion air conditioner. Background technique [0002] Urban rail or light rail vehicles generally have the problems of short vehicle running intervals, high frequency of door opening and closing, and large changes in passenger loads, resulting in large changes in the thermal load inside the vehicle. The control method of the air conditioner compressor that is widely used at present is to determine the start-stop and / or operating frequency of the compressor according to the temperature difference between the temperature in the passenger compartment and the target temperature. Taking the simple temperature difference as the judgment condition for the start-stop and / or operating frequency of the compressor will easily cause the phenomenon that the start-stop and / or operating fre...

AI Technical Summary

Problems solved by technology

Taking the simple temperature difference as the judgment condition for the start-stop and / or operating frequency of the compressor will easily cause the phenomenon that the start-stop and / or operating frequency of the compressor do not match the actual demand in the passenger room, and the frequency conversion of the air-conditioning mode will cause the temperature difference in the passenger room Large changes, frequent start and stop also have a great impact on the life of the compressor

Images