The invention provides an air conditioning system for a railway vehicle, a control method of the air conditioning system and the railway vehicle, the air conditioning system comprises a main loop and a first bypass branch, a compressor, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger are sequentially connected to the main loop in series, and the first bypass branch communicates with an exhaust port of the compressor and an inlet of the indoor heat exchanger; part of refrigerant discharged from the compressor is discharged into the indoor heat exchanger through the first bypass branch. Parts of refrigerants are discharged into the indoor heat exchanger through the first bypass branch instead of passing through the outdoor heat exchanger, so that the high-temperature refrigerants which do not pass through heat exchange of the outdoor heat exchanger neutralize the temperature of the indoor heat exchanger, the cooling capacity output of the indoor heat exchanger is effectively reduced, the cooling capacity adjusting range of the air conditioning unit of the railway vehicle is widened, and the service life of the air conditioning unit is prolonged. And when the thermal load of the railway vehicle is low, the refrigerating capacity of the unit is reduced, so that the condition that the thermal load in the railway vehicle is low is better adapted. And the risk of frequent shutdown of the compressor is avoided, and the service life of the compressor is prolonged.
本发明提供了轨道车辆用空调系统及其控制方法、轨道车辆,包括主回路和第一旁通支路,主回路上依次串联有压缩机、室外换热器、第一节流元件和室内换热器,第一旁通支路与压缩机的排气口和室内换热器的进口相通,使得自压缩机排出的部分冷媒经过第一旁通支路排入室内换热器。本发明部分冷媒不经过室外换热器而是经第一旁通支路排入室内换热器,这样这部分未经过室外换热器换热的高温冷媒中和室内换热器的温度,有效地降低室内换热器的冷量输出,拓宽了轨道车辆空调机组的冷量调节范围,在轨道车辆热负荷较低时,降低机组的制冷量,从而更好的适应轨道车辆车内热负荷较低的情况。并且避免了压缩机频繁停机的风险,延长了压缩机的使用寿命。
Air conditioning system for railway vehicle, control method of air conditioning system and railway vehicle
轨道车辆用空调系统及其控制方法、轨道车辆
2022-11-22
Patent
Electronic Resource
Chinese
IPC: | B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES |
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