What is the freezer?

The refrigerator refers to a mechanical apparatus for changing the pressure change of the refrigerant gas by a compressor to achieve a low temperature refrigeration. The compressor used is different from the general air compressor due to the different conditions and compressed working media. According to the difference in the structure and working principle of the refrigerator, it is similar to the air compressor, and can also be divided into several different forms such as piston type, screw type, centrifugal type. Freezer is one of the most important components in compressed refrigeration equipment. The freezer is formed by the 50 parts of the compressor, condenser, evaporator, drying filter, and expansive throttle. Inside the injective amount of refrigerant is controlled by the electrical device according to the environment needs to achieve refrigeration heat transfer. the goal of. The operation procedures, lubrication characteristics, and fault repair are described in detail.

Freezer classification:

The freezer has water-cooled, air-cooled types.

Water-cooled refrigeration effect is better, but it is necessary to cool water, the air-cooled flexible, no cooling water, suitable for water shortage or need to use mobile applications. The working medium of the freezer is a refrigerant that transmits a heat task in the refrigeration system. Commonly used refrigerants are: fluoridone, ammonia, bromide, chloromethane, etc., wherein the fluorid is different from its gasification temperature and chemical molecular formula. Fluorine 11 (R-11), fluorine 12 (R-12), fluorine 13 (R-13), fluorine 21 (R-22), fluorine 113 (R-113), fluorine 114 (R-114), fluorine 142 (R-142) and many other. The refrigerant can be used for low pressure (less than 0.3-0.3MPa), respectively. (Evaporation temperature is greater than 0 ° C), medium pressure (condensed pressure 0--50 ° C) and high pressure (condensation pressure) More than 2 MPa) Refrigeration system with low temperature (evaporation temperature is less than -50 ° C).