Analyze the choice of piping for refrigeration
The choice of the exhaust pipe of the refrigerator: The pressure drop in the exhaust pipe will directly affect the required power of the refrigerator. The refrigerator usually controls the pressure drop in the exhaust pipe to be equal to the saturation condensation difference of 0.510. For the capacity t of the exhaust pipes of R12 and R22, the refrigerator can be approximately universally used when the condensation degree is between 35-45 ° C.
For exhaust pipes, in addition to the pressure drop, the freezer should be in a rising standpipe. The chiller should also consider the necessary oil loading speed. See the minimum flow velocity of the oily air flow in the exhaust riser.
Selection of high-pressure liquid pipeline: High-pressure liquid pipeline refers to the carcass pipeline from the reservoir to the inlet of the thermal expansion valve, excluding the liquid pipeline from the condenser to the reservoir.
The pressure drop in some high-pressure liquid pipelines can cause flash gas to cause the thermal expansion valve to malfunction. Usually, the pressure drop in the high-pressure liquid pipeline is controlled to be equal to the energy of the liquid pipeline with a saturation saturation difference of 0.5C, R12 and R22, and the container of the exhaust pipeline. The drain pipe of the condenser of the refrigerator: the liquid pipe of the refrigerator from the condenser to the receiver. The refrigerator is called the drain pipe of the condenser. When the liquid flow rate is 0.5 when the liquid flow rate is 3, the liquid depression degree is 40C, and the Yanfa retreat degree is a 20C, the inner diameter of the refrigerator pipe and the corresponding refrigerator. When the condenser to the top of the reservoir is designed with sufficient vapor equilibrium pipes.