What is the effect of stainless steel capillary in air conditioning?

The function of the capillary is to throttle and step-down the high-pressure FREon refrigerant from the condenser into the low-pressure FREon refrigerant, and then vaporize and absorb heat in the evaporator to realize the refrigeration process. The pressure drop generated by the refrigerant through the capillary varies with the capillary length, inner diameter and inner wall roughness. The longer the capillary, the thinner the inner diameter and the rougher the inner wall, the greater the pressure drop. Each air conditioner is equipped with a capillary tube matching the refrigeration system. The flow rate of each capillary is measured by the manufacturer, so when maintaining the air conditioner, it can not be replaced at will.

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