The invention belongs to the technical field of air conditioners, and particularly relates to an electronic expansion valve control method for starting a heat pump air conditioner under a low-temperature working condition, which comprises the following steps: an automobile heat pump air conditioner initiates a heating starting request when the external environment temperature is-10 DEG C to 5 DEG C; calculating the current condenser outlet temperature, the condenser outlet pressure, the compressor inlet pressure, the actual supercooling degree, the target starting pressure and the target supercooling degree; initializing an electronic expansion valve and setting a threshold value; the air conditioning system carries out pressure control on the opening degree of the electronic expansion valve through the target starting pressure and the condenser outlet pressure; the air conditioning system conducts supercooling degree control over the opening degree of an electronic expansion valve through the target supercooling degree and the actual supercooling degree; and hysteresis is added in the pressure control process and the supercooling degree control process, and it is ensured that the system does not repeatedly jump between the pressure control process and the supercooling degree control process. Segmented control is adopted while the threshold value is set, the heat pump air conditioner can rapidly achieve system stability in the low-temperature environment, stable heating is achieved, and energy consumption is reduced.
本发明属于空调技术领域,具体涉及一种低温工况下热泵空调启动的电子膨胀阀控制方法,包括:汽车热泵空调在外部环境温度为‑10℃到5℃时发起制热启动请求;计算当前冷凝器出口温度、冷凝器出口压力与压缩机入口压力、实际过冷度、目标启动压力、目标过冷度;电子膨胀阀初始化和阈值设置;空调系统通过目标启动压力和冷凝器出口压力进行压力控制电子膨胀阀开度;空调系统通过目标过冷度和实际过冷度进行过冷度控制电子膨胀阀开度;并在压力控制和过冷度控制过程中添加滞环,确保系统不会在压力控制和过冷度控制之间反复横跳。本发明通过设置阈值的同时采用分段控制,能够使热泵空调在低温环境下快速达到系统稳定,实现稳定制热节约能耗。
Electronic expansion valve control method for starting heat pump air conditioner under low-temperature working condition
一种低温工况下热泵空调启动的电子膨胀阀控制方法
2023-10-27
Patent
Elektronische Ressource
Chinesisch
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
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