It is normal to produce heat when runs the radiator of the freezer. Freezers are refrigerated by compressor and the circulation of Freon. It takes away the heat by the circulation of freon.You can see the radiator from its external structure from the old refrigerators or freezers, which looks like rows of black tubes . Nowadays we have the radiator build-in for the sake of its beautiful looking . So you can't see it , but you can still feel the heat dissipation.
Two-setion Vertical Refrigerator
We know that any materials will just to give heat off during liquefaction and to absorb heat during gasification ---- this is the common physical phenomena, which is widely used in freezers and refrigerators. The refrigerant liquid gives off heat, then absorbs heat from evaporation . The position of the heat which is given off from the liquefaction must be different from the position of absorbing heat from evaporation, otherwise , it will become effectless.
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