Patent ID: 11927379
Assignee: XI'AN JIAOTONG UNIVERSITY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 1:
2. The precooler-based transcritical CO2 heat pump system of claim 1, further comprising: an ambient temperature sensor, an evaporation fin temperature sensor and an evaporation pressure sensor; wherein the ambient temperature sensor is configured to sense a temperature of inlet air of the CO2 evaporator (15) of the CO2 heat pump system; the evaporation fin temperature sensor is configured to sense a temperature of fins of the CO2 evaporator (15); the evaporation pressure sensor is configured to sense a pressure of refrigerant in the CO2 evaporator (15); signals sensed by the ambient temperature sensor, the evaporation fin temperature sensor and the evaporation pressure sensor are transmitted into a programmable logic controller (PLC); the PLC controls starting or stopping of the precooling system compressor (21), the CO2 compressor (11), the defrosting solenoid valve (14) and a waterway bypass valve (3) through electronic signals, and controls opening degree adjustment of the electronic expansion valve (13) and the waterway two-way regulating valve (4) through electronic signals.