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How many kinds of cooling methods are there for refrigeration equipment?

There are two kinds of cooling methods of refrigeration equipment: direct cooling and indirect cooling.

Direct cooling is to install the evaporator of the refrigerator in the box or building of the refrigeration device, use the evaporation of the refrigerant to directly cool the air, and rely on cold air to cool the object that needs to be cooled. The advantages of this cooling method are that the cooling speed is fast, the heat transfer temperature difference is small, and the system is relatively simple, so it is widely used.

Indirect cooling depends on the evaporation of the refrigerant in the evaporator of the refrigerator, so that the refrigerant (such as brine) is cooled, and then the refrigerant is input into the box or building of the refrigeration device, and the air is cooled through the heat exchanger. This cooling method has a slow cooling speed, a large temperature difference in total heat transfer, and a complex system, so it is only used in fewer occasions, such as brine ice making and cold storage with constant temperature requirements.

According to the different purposes of cooling and the use of cold capacity, refrigeration devices can be broadly divided into four categories: refrigeration devices for refrigeration, refrigeration devices for testing, refrigeration devices for production and refrigeration devices for air conditioning. Refrigeration refrigeration equipment is mainly used to store or transport food and other goods at low temperatures, including various refrigerators, cold storage, refrigerated trucks, refrigerated ships and refrigerated containers.

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