In some refrigerators, inner walls or large refrigerated plates are kept (much of the time) at a temperature slightly ... deposited as frost and must be removed by defrosting. ... The refrigerant must be a material in a fluid state a liquid or gas. ... One step up on energy, cost, and convenience scales is the cycle-defrost refrigerator, which is usually larger than the manual-defrost type. If the refrigerator is combined with a zero freezer, only the refrigerator section is defrosted automatically.
|Title||:||Choosing and using home equipment|
|Publisher||:||Iowa State Pr - 1971|