Mayekawa Mfg. Co., Ltd.

Takahiro Furudate

Choiku Yoshikawa

Takeshi Kamimura

Shuji Fukano

A sublimation defrost system for a refrigeration apparatus including: a cooling device in a freezer, and includes a casing containing a heat exchanger pipe; a refrigerating device for cooling and liquefying a COrefrigerant; and a refrigerant circuit connected to the heat exchanger pipe permitting the cooled and liquefied COrefrigerant to circulate. The defrost system includes: a dehumidifier device; a COcirculation path in the heat exchanger pipe, an on-off valve in the heat exchanger; a circulating unit for the COrefrigerant; a first heat exchanger part exchanging heat between a brine as a first heating medium and the circulating COrefrigerant; and a pressure adjusting unit for the circulating COrefrigerant during defrosting so that a condensing temperature of the COrefrigerant becomes equal to or lower than a freezing point of a water vapor in the freezer inner air without a drain receiving unit.

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Tokyo, Japan

Takahiro Furudate