Air conditioner condenser for agricultural machinery - refrigeration process of tractor air conditioner:
The ultra-low temperature bottom pressure gaseous refrigerant (refrigerant pressure is about 0.3MPa, temperature is about 0 ℃) passing through the evaporator turns into high pressure and high temperature refrigerant vapor after the refrigeration compressor (when the average external temperature is 30 ℃, the refrigerant pressure is about 1.7MPa, about 70 ℃). The reduced refrigerant enters the condenser through the exhaust pipe, and the high pressure and high temperature refrigerant vapor enters the condenser. With the mandatory refrigeration effect of the diesel engine cooling fan, The refrigerant releases a lot of heat into the air according to the condenser, so that the gaseous refrigerant can generate refrigerant liquid with high pressure and medium temperature (at this time, the liquid refrigerant temperature is about 60 ℃, and the pressure is about 1.5MPa), and then enters into the dry liquid receiver. After the moisture absorption and filtered refrigerant of the dry liquid receiver, it arrives at the evaporator through the air conditioning expansion valve, because of the small round hole effect of the air conditioning expansion valve (diameter is only mm up and down), The pressure and temperature of the liquid refrigerant are greatly reduced (the refrigerant pressure is about 0.3MPa, and the temperature is about 0 ℃). A small part of the liquid refrigerant (about 15-20%) flashes into vapor, and then enters the evaporator to develop the heat exchanger with the gas in the cab (about 0.1MPa, 30 ℃) to digest and absorb the heat in the cab (according to the gas transmission), The refrigerant becomes gaseous after endothermic reaction (the refrigerant vapor pressure is 0.2MPa, and the temperature is about 5 ℃), and then the ultra-low temperature, bottom pressure gaseous refrigerant returns to the refrigeration compressor. In this way, the circulation system is carried out in the sealing system software, and the heat generated in the car is continuously extracted to complete the cooling until the specified set temperature in the car body is achieved. Air conditioner condenser for agricultural machinery.
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