We all know that household refrigerators are AC power, but in many factories and other places, we will need to use AC power, then we need to choose a DC freezer to use. However, the refrigeration principles of different refrigerators are also different, let's take a look.
Compression-type refrigerator: It uses the compressor to work on the refrigeration system. The refrigeration system of the refrigerator uses the principle that the refrigerant below the boiling point becomes vapor in the evaporator to absorb heat.
Absorption refrigerator: This kind of refrigerator can use the electric heating element as power, and use the mixed solution of ammonia, water, and hydrogen to continuously absorb heat and diffuse to the purpose of refrigeration. Its refrigeration efficiency is low, and the cooling rate is relatively slow.
Semiconductor refrigerator: It uses the effect of PN-type semiconductors on the nodes through direct current and uses the principle of the Peltier effect to realize the refrigeration of refrigerators.
If it is for home use and requires a larger volume, the AC big size freezer is more practical.