1、 Classification and application of refrigerants

Refrigerant, also known as refrigerant or snow seed, is a medium substance used in various heat engines to complete energy conversion. These substances typically increase power through reversible phase transitions, such as gas-liquid phase transitions. Such as steam in steam engines, snow in refrigerators, and so on. During operation, a typical steam engine releases the thermal energy of steam and converts it into mechanical energy to generate the motive force; And the snow seed of the refrigeration machine is used to transfer the heat from low temperatures to high temperatures.