Gas-liquid Separator for suction pipe
For systems prone to liquid overflow, a gas-liquid separator should be installed on the suction pipe to temporarily store the overflow liquid refrigerant in the system and return the liquid refrigerant to the compressor at a rate that the compressor can withstand.
When the heat pump from the cooling condition switch to the heating condition is most likely to occur refrigerant overflow, under normal circumstances, suction gas and liquid separator in all heat pumps are necessary equipment. The use of hot air defrost system in the defrost device at the beginning and end of the instant also prone to liquid overflow. Compressors with low superheat devices such as liquid freezers and low temperature display cabinets occasionally overflow due to improper refrigerant control.
For vehicle devices, when a long period of downtime after a period of time, when the reboot is also prone to serious overflow phenomenon.
In the two-stage compressor in the direct return to the lower cylinder, not through the motor room, should use gas-liquid separator to protect the compressor valve from the damage of the hydraulic strike. Because of different refrigeration system overall filling requirements, and refrigerant control methods are different, whether the need for gas-liquid separator and the need for the size of the gas-liquid separator to a large extent depends on the requirements of the specific system. A conservative design method is to determine the capacity of a gas-liquid separator by 50% of the total charge of the system without accurately testing the amount of fluid reflux.