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display cases Refrigeration system composition
author: supermarket refrigerated showcase category: walk-in display coolers Views: 583Time: 2016-08-22
display cases Refrigeration system composition
display cases Refrigeration system composition refrigerant, carrier refrigerant and lubricating oil. The refrigerant is also called refrigeration working medium , which circulates in the refrigeration system and continuously produces phase changes to A substance that transfers heat. For example, in the vapor compression refrigeration cycle, the refrigerant is used to absorb heat and vaporize in the evaporator, and the heat is released in the condenser to liquefy to transfer heat, thereby achieving refrigeration. The refrigerant, also known as refrigerant , is a liquid substance that circulates in an indirect refrigeration system and continuously produces temperature changes to transfer heat. For example, in large display cases and air-conditioning systems, water or salt water is used as an intermediate material for heat transfer — — refrigerant carrier. The refrigerant is cooled in the evaporator, sent to the cooling device, absorbs the heat of the material to be cooled, and then returns to the evaporator to be cooled again. Lubricating oil is used to lubricate the friction surface of the compressor to ensure the safe operation of the compressor. Whether
lubrication is good has a great influence on the working reliability and service life of the compressor. Refrigerant display cases Commonly used refrigerants include ammonia, freon R22 and R134a, etc. When selecting these refrigerants, safety, refrigerant price, environmental protection and other factors must be considered.
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