| 摘要 |
An inverter ( 22 ) is provided between a power source ( 20 ) and a suction/discharge valve driving motor ( 14 ) that controls cycle time of suction and discharge of a refrigerator unit ( 10 ). An output frequency of the inverter ( 22 ) is controlled in accordance with output of a sensor ( 24 ) that detects temperature of a thermal load portion ( 11 ) of the refrigerator unit ( 10 ). This enables temperature adjustment of individual refrigerators with a highly reliable method without using an electric heater.
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