Refrigeration maintenance: defrosting by compressor shutdown Is defrosting of a domestic refrigerator achievable by stopping the compressor for a short period (off-cycle defrost)? Choose the correct truth value.
Mechanical Engineering
Heat Transfer, Refrigeration and Air Conditioning
Difficulty: Easy
Choose an option
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ATrue (off-cycle defrost is a valid method)
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BFalse (compressor must continue running to defrost)
Answer
Correct Answer: True (off-cycle defrost is a valid method)
Explanation
Concept/ApproachWhen the compressor is stopped, coil temperature rises above the frost point, allowing accumulated frost to melt (off-cycle defrost), especially in medium/high evaporating temperature systems.
NotesOther methods include electric heaters and hot-gas defrost for low-temperature (freezer) systems, but stopping the compressor is a standard defrost option in suitable applications.
Final AnswerTrue