Components of the refrigeration system
The compressor is the power of the refrigeration cycle. It is rotated by the motor and rotates continuously. In addition to timely extracting the vapor in the evaporator and maintaining the low temperature and low pressure, it also increases the pressure and temperature of the refrigerant vapor through compression to create a refrigerant. The condition in which the heat of the vapor is transferred to the external environment medium. The low-temperature low-pressure refrigerant vapor is compressed to a high temperature and high pressure state, so that the refrigerant vapor can be condensed by using normal temperature air or water as a cooling medium.
The condenser is a heat exchange device, which uses the ambient cooling medium (air or water) to carry away the heat of the high-temperature and high-pressure refrigeration vapor from the compressor, and cools and condenses the high-temperature and high-pressure refrigerant vapor into a high-pressure normal temperature refrigerant liquid. . It is worth mentioning that during the process of changing the refrigerant vapor into the refrigerant liquid, the pressure is constant and still high pressure.
3. Throttle element
The high-pressure normal temperature refrigerant liquid cannot be directly sent to the low-temperature evaporator, and the pressure of the refrigerant liquid is lowered according to the saturation pressure and the saturation temperature-corresponding principle, thereby lowering the temperature of the refrigerant liquid. The high-pressure normal temperature refrigerant liquid is passed through a pressure-reducing device, a throttling element, to obtain a low-temperature low-pressure refrigerant, which is then sent to the evaporator for heat absorption and evaporation. In the refrigerators and air conditioners in daily life, capillary tubes are commonly used as throttling elements.
The evaporator is also a heat exchange device. After the throttling, the low-temperature and low-pressure refrigerant liquid evaporates (boiling) into steam, absorbs the heat of the cooled substance, and lowers the temperature of the substance to achieve the purpose of freezing and refrigerating food. In the air conditioner, the surrounding air is cooled to cool and dehumidify 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 ° C ~ -20 ° C, and the air conditioner is adjusted at 5 ° C ~ 8 ° C.