The invention discloses an air conditioning unit for railway vehicles, which belongs to the technical field of air conditioning systems for railway vehicles and comprises a refrigerant loop, a condensation fan positioned in a condensation cavity and an air feeder positioned in an evaporation cavity. The refrigerant loop comprises a compressor, an exhaust one-way valve, a condenser, a liquid pipe electromagnetic valve, an electronic expansion valve, an evaporator, a low-pressure pressure sensor and an air return electromagnetic valve, and the key point is that the refrigerant in the refrigerant loop is R290; the air conditioning unit executes an evacuation circulation operation to store a refrigerant in a condenser before shutdown and power failure each time; when the compressor stops running every time, the liquid pipe electromagnetic valve and the air return electromagnetic valve are closed at the same time. The invention has the following beneficial effects: 1, R290 is adopted as a refrigerant, so that the pollution to the atmosphere is greatly reduced, and meanwhile, along with the promotion of F-Gas requirements of European Union, the problem of subsequent refrigerant replacement is avoided; and 2, after the air conditioning unit is shut down, a condensing agent can be stored in the condenser, so that the refrigerant is prevented from leaking in an evaporation cavity, and the safety of the unit is ensured.
本发明公开了一种轨道车辆空调机组,属于轨道车辆空调系统技术领域,包括制冷剂回路、位于冷凝腔内的冷凝风机和位于蒸发腔内的送风机,制冷剂回路包括压缩机、排气单向阀、冷凝器、液管电磁阀、电子膨胀阀、蒸发器、低压压力传感器和回气电磁阀,关键在于,制冷剂回路中的制冷剂为R290;空调机组在每次停机断电前执行抽空循环操作以将制冷剂储存到冷凝器内;压缩机每次停止运行时,液管电磁阀和回气电磁阀同时关闭。本发明的有益效果是:1、制冷剂采用R290,大大降低了对大气的污染,同时随着欧盟F‑Gas要求的推进,避免了后续更换制冷剂的问题;2、在空调机组停机后,可以将冷凝剂存储至冷凝器,防止制冷剂在蒸发腔内泄漏,保证机组的安全。
Railway vehicle air conditioning unit
轨道车辆空调机组
2024-06-21
Patent
Electronic Resource
Chinese
IPC: | B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES |
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