1. Compression refrigeration principle: cryogenic freezer compresses the refrigerant into a high temperature and high pressure gas through the compressor, and then cools it into a high-pressure liquid through the condenser, and then expands it into a low-temperature and low-pressure gas through the expansion valve, and finally absorbs the heat through the evaporator, realizing the process of refrigeration.
2. Absorption refrigeration principle: low-temperature freezer through the chemical reaction between the absorber and the refrigerant to realize refrigeration. The absorber absorbs the vapor of the refrigerant to form a solution, and then it is separated by heating, the refrigerant evaporates, and the absorber absorbs the vapor of the refrigerant again, and the cycle repeats itself, realizing the process of refrigeration.
3. Principle of thermoelectric refrigeration: Cryogenic freezers realize refrigeration through the thermoelectric effect of thermoelectric materials. When the temperature of the two ends of the thermoelectric material is different, there will be a potential difference, which generates an electric current, so that one end of the thermoelectric material absorbs heat, and the other end discharges heat, realizing the process of refrigeration.
You can understand the freezer of Zhongneng temperature control, quality is guaranteed!