After the Mini Car Freezer is energized, the compressor works and sucks the low-pressure, low-temperature gaseous refrigerant that has absorbed heat in the evaporator. After compression, it forms a high-pressure, high-temperature vapor with a temperature of 55℃～58℃ and a pressure of 112～8 Pa. Enter the condenser. Due to the throttling of the capillary tube, the pressure drops sharply. Because the pressure in the evaporator is lower than that of the condenser, the liquid refrigerant immediately boils and evaporates, and the heat in the absorption box becomes a low-pressure, low-temperature vapor. It is sucked by the compressor again. In this way, the heat inside the refrigerator is continuously transferred to the outside of the box.
There are two main types of car refrigerators. One is a semiconductor car refrigerator. Its principle is to rely on electronic chips for cooling and use a PN junction composed of special semiconductor materials to form a thermocouple pair to produce the Peltier effect, which is a kind of cooling by direct current. New refrigeration method.
The other is a compressor car refrigerator. The compressor is the traditional technology of traditional refrigerators. The cooling temperature is low, at -18 degrees and 10 degrees. High refrigeration efficiency, ability to make ice, keep fresh, and large size, is the mainstream direction of the future development of car refrigerators. However, such refrigerators are heavy, inconvenient to carry, and expensive.