The evaporation process of the evaporator of the refrigerator display cabinet: the evaporation process is carried out in the evaporator. Liquid refrigerant absorbs heat when evaporating in evaporator, reducing the temperature of the surrounding medium and maintaining a certain low temperature, thus achieving the purpose of refrigeration. The size of evaporator is mainly determined by the amount of evaporation in the evaporator. The gaseous refrigerant does not produce phase change through the evaporator, it does not produce the cooling effect, so it should limit the throttle vaporization effect of the capillary, so that the refrigerant that flows into the evaporator must be a liquid refrigerant. In addition, the lower the evaporation temperature, the corresponding cooling quantity is also slightly reduced, and will increase the power consumption of the compressor, and the cooling coefficient of circulation drops.
Condensing process of refrigerating condenser: the condensation process is carried out in the condenser. It is a constant pressure and exothermic process. In order for the refrigerant to be used again and again, the refrigerant that needs to be released from the evaporator is condensed and reduced to a liquid, which is heated to the environmental medium.
The condenser is divided into cooling sections and condensing sections according to the working process. Near the entrance to the condenser for cooling section, the high temperature of refrigerant metal coil overheat steam through the condenser and radiator, the heat to the surrounding air, temperature and cooling, become saturated vapor. The condenser is near the exit of the condensing section, and the refrigerant is condensed from saturated vapor to give off latent heat to the surrounding air.