How to refrigerate the car refrigerator?

The car refrigerator is cooled by semiconductor. The following is the extended knowledge about car refrigerator: 1, function introduction: car refrigerator uses semiconductor refrigeration. Small size, light weight, no noise, easy to carry, the lowest temperature drops to about MINUS 4 degrees Celsius, and it can only be used for refrigeration. If the power supply is reversed, it can be heated. The refrigeration effect of car refrigerator is generally not obvious, and those with slow refrigeration speed usually move into home refrigerator to refrigerate or freeze items. 2. Type: (1) incubator: a shell made of thermal insulation material, which is cooled and heated by an energy storage box to maintain the temperature of articles. (2) Semiconductor car refrigerator: refrigeration through electronic chips. The pn junction made of special semiconductor materials forms a thermocouple pair, which produces the Peltier effect. Namely a new direct-current refrigeration method. The refrigeration temperature range is -5 to 65 degrees. (3) Car refrigerator with compressor: The compressor is a traditional technology of traditional refrigerator, and the refrigeration temperature is-18 degrees 10 degrees. High refrigeration efficiency and large volume are the mainstream development direction of future car refrigerators. (4) Electronic ice-making refrigerator: electronic ice-making is realized based on the special internal structure of dual-electronic synchronous refrigeration. It can reach MINUS three degrees heating and 65 degrees cooling with adjustable temperature.