Refrigerator is a heat of a cooled object having a lower temperature to an environmental medium to obtain a cold amount of the machine. The heat transferred from a lower temperature object is customarily referred to as the amount of heat.
The refrigerant that participates in the thermal process change (energy conversion and heat transfer) in the refrigerator is called a refrigerant. The cooling temperature range is usually above 120K, and below 120K is the deep cryogenic technology range.
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