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Refrigeration equipment is mainly composed of compressors, expansion valves (or throttling devices), evaporators, condensers and accessories, pipelines, etc. These components work together to achieve cooling through the circulation of refrigerant.
The working principle of refrigeration equipment
The working principle of refrigeration equipment is mainly to use the physical properties of refrigerant to achieve heat transfer through the circulation process of refrigerant. Specifically, the refrigerant is compressed into a high temperature and pressure gas in the compressor, and then the heat is released in the condenser and condensed into a liquid state. Then, the liquid refrigerant goes through the expansion valve to reduce the pressure and cool down, and becomes a low-temperature and low-pressure liquid or gas-liquid mixed state, which enters the evaporator to absorb the heat of the cooled object and evaporates into a gas. Finally, the gaseous refrigerant is again sucked in by the compressor, starting a new cycle.
Refrigerants commonly used in refrigeration equipment
Refrigerants are key substances in refrigeration equipment and are used to transfer heat in the refrigeration cycle. Common refrigerants include freon and ammonia. However, due to the damaging effect of freon on the atmospheric ozone layer, its use has been restricted by environmental regulations. As a result, ammonia and other new coolants are being re-used and trialed.