| 摘要 |
PURPOSE: A defrosting system is provided to implement rapid defrosting through the successive continuous defrosting operation without the halting of a compressor and the switching of a four-way valve, thereby saving energy. CONSTITUTION: A freezer device comprises an outdoor unit system(100), an indoor unit system(200), and a control unit. The outdoor unit system includes a compressor(1), outdoor units(2,3), an expansion valve, and a four-way valve(5). The indoor unit system includes an indoor unit(4) and an indoor unit fan. A defrosting system of the freezer device comprises hot gas bypass valves(20,21,22) which are attached to the outdoor and indoor unit systems and successively defrosts the outdoor units.
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