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What is the working principle of a portable refrigerator?

Update:2021-07-09
Summary: The portable refrigerator is used indoors, outdoors, on the road or in the office. The mini hot and cold box can keep your food and beverages cool a...
The portable refrigerator is used indoors, outdoors, on the road or in the office. The mini hot and cold box can keep your food and beverages cool and fresh. Refrigerators with USB power supply for portable refrigerators use semiconductor refrigeration, portable freezer manufacturers and the temperature does not reach below zero, so it cannot freeze. With cooling and heating functions. In addition to being used in homes and offices, it can also be used directly in cars.YT-B-65PX 52L/13L 58W Camping Portable Refrigerator
Placed in different directions, it is indeed multi-purpose. The mini hot and cold box can conveniently store sandwiches, fruits, cosmetics and more kinds of items. Equipped with a public connection wire and a car cigarette lighter connection wire means that you can keep food and beverages cool in the car. Suitable for picnic or fishing trips. Once you have our hot and cold box on hand, you will want to put one in every room in your family. It can also show the fluency of life's personality and avant-garde fashion.
The characteristics of the multi-purpose portable refrigerator classification: do not use electricity, use chemical energy; small size, light weight; mobile, convenient for users to carry. The portable refrigerator is composed of a refrigerator insulation shell, a refrigerant storage bag and a chemical refrigerant. The refrigerator can be used for cooling when it is turned on, and the cooling duration can be determined by the amount of chemical energy added. The temperature in the box can be reduced to zero degrees Celsius to minus 10 degrees Celsius, which is suitable for high-temperature operations in the field; when it is hot, long-distance transportation of items to keep fresh; first aid for cooling the sick body; also a good friend for tourists in hot weather. The portable refrigerator is composed of a refrigerator insulation shell, a thermometer, a nylon carrying (back) bag, a refrigerant plastic bag and a chemical refrigerant.
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