Introduction to the composition of refrigerated truck refrigeration system and the role of each component（3）

Introduction to the composition of refrigerated truck refrigeration system and the role of each component（3）

The evaporator is also a heat exchange device. The low-temperature and low-pressure refrigerant liquid after throttling evaporates in it to become vapor, absorbs the heat of the material to be cooled, reduces the temperature of the material, and achieves the purpose of freezing and refrigerating food. In the air conditioner, the surrounding air is cooled to achieve the effect of cooling and dehumidifying the air. The lower the evaporation temperature of the refrigerant in the evaporator, the lower the temperature of the object to be cooled. In the refrigerator, the evaporation temperature of the general refrigerant is adjusted at -26℃~-20℃, and in the air conditioner, it is adjusted at 5℃~8℃.

The high-pressure and normal temperature refrigerant liquid is not directly sent to the low-temperature evaporator. According to the principle of saturation pressure and saturation temperature-the corresponding principle, the pressure of the refrigerant liquid is reduced, thereby reducing the temperature of the refrigerant liquid. Pass the high-pressure and normal-temperature refrigerant liquid through the pressure reducing device—throttling element to obtain low-temperature and low-pressure refrigerant, and then send it to the evaporator to absorb heat and evaporate. In daily life refrigerators and air conditioners, capillary tubes are often used as throttling elements.

The condenser is a heat exchange device, which uses the ambient cooling medium (air or water) to take away the heat of the high-temperature and high-pressure refrigerant vapor from the cold compressor to cool and condense the high-temperature and high-pressure refrigerant vapor into a high-pressure and normal-temperature refrigerant liquid. It is worth mentioning that in the process of the condenser changing the refrigerant vapor into the refrigerant liquid, the pressure remains constant and remains high.

The above is an introduction to the components of the refrigeration systems of refrigerated trucks. I believe you have a deeper understanding of the refrigeration principles of refrigerated trucks.