发明名称 |
SUBLIMATION DEFROST SYSTEM FOR REFRIGERATION DEVICES AND SUBLIMATION DEFROST METHOD |
摘要 |
A sublimation defrost system for a refrigeration apparatus including: a cooling device which is disposed in a freezer, and includes a casing and a heat exchanger pipe disposed in the casing; a refrigerating device for cooling and liquefying a CO 2 refrigerant; and a refrigerant circuit which is connected to the heat exchanger pipe and which is configured to permit the CO 2 refrigerant cooled and liquefied in the refrigerating device to circulate to the heat exchanger pipe, the defrost system including: a dehumidifier device for dehumidifying freezer inner air in the freezer; a CO 2 circulation path which is formed of a circulation path forming path connected to an inlet path and an outlet path of the heat exchanger pipe, and includes the heat exchanger pipe; an on-off valve disposed in each of the inlet path and the outlet path of the heat exchanger pipe and configured to be closed at a time of defrosting so that the CO 2 circulation path becomes a closed circuit; a circulating unit for CO 2 refrigerant, the circulating unit being disposed in the CO 2 circulation path; a first heat exchanger part configured to cause heat exchange between a brine as a first heating medium and the CO 2 refrigerant circulating in the CO 2 circulation path; and a pressure adjusting unit which adjusts a pressure of the CO 2 refrigerant circulating in the closed circuit at the time of defrosting so that a condensing temperature of the CO 2 refrigerant becomes equal to or lower than a freezing point of a water vapor in the freezer inner air in the freezer. The defrosting is able to be achieved without a drain receiving unit. |
申请公布号 |
EP2940410(A1) |
申请公布日期 |
2015.11.04 |
申请号 |
EP20140873060 |
申请日期 |
2014.11.25 |
申请人 |
MAYEKAWA MFG. CO., LTD. |
发明人 |
YOSHIKAWA, CHOIKU;KAMIMURA, TAKESHI;FURUDATE, TAKAHIRO;FUKANO, SHUJI |
分类号 |
F25B47/02;F25B1/00;F25B1/10;F25B7/00;F25B9/00;F25B23/00;F25B25/00;F25B41/00;F25B41/04;F25B49/02;F25D17/02;F25D21/10;F25D21/12;F25D21/14 |
主分类号 |
F25B47/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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