Design of portable refrigerator based on DS18B20 temperature sensor

The design uses STC89C52RC microcontroller and semiconductor cooler to design portable refrigerator, using DS18B20 temperature sensor module, SSD1306 OLED display module, relay and aluminum heat sink. It realizes the function of portable refrigerator to control the cooler and display the temperature individually. The temperature measurement module will test the real-time temperature inside the portable refrigerator after turning on the portable refrigerator; the switch of the air-cooled radiator and the switch of the semiconductor cooling fins are controlled by the principle of weak power controlling strong power. Portable refrigerator is able to design different functions according to different needs or environment. This design of portable refrigerator can reduce the temperature of items in a short period of time outdoors. The portable refrigerator which uses the semiconductor refrigeration sheet has a simple refrigeration structure and no pollutant generation, which is in line with people's pursuit of green environment.