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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9863677 B1

PDFFull Text
Date of Patent:
Jan. 09, 2018

Filed:

Nov. 25, 2014

Sublimation defrost system and sublimation defrost method for refrigeration apparatus

Applicant:

Mayekawa Mfg. Co., Ltd., Tokyo, JP;

Inventors:

Choiku Yoshikawa, Tokyo, JP;

Takeshi Kamimura, Tokyo, JP;

Takahiro Furudate, Tokyo, JP;

Shuji Fukano, Tokyo, JP;

Assignee:

MAYEKAWA MFG. CO., LTD., Tokyo, JP;

Attorney:

Rossi, Kimms & McDowell LLP

Primary Examiner:

Len Tran

Assistant Examiner:

Ana Vazquez

Int. Cl.
CPC ...
F25B 41/00 (2006.01); F25B 47/02 (2006.01); F25D 17/02 (2006.01); F25B 1/10 (2006.01); F25B 7/00 (2006.01); F25D 21/10 (2006.01); F25B 9/00 (2006.01); F25B 41/04 (2006.01); F25B 49/02 (2006.01); F25D 21/12 (2006.01); F25D 21/14 (2006.01); F25B 25/00 (2006.01); F25B 23/00 (2006.01);
U.S. Cl.
CPC ...
F25B 47/02 (2013.01); F25B 1/10 (2013.01); F25B 7/00 (2013.01); F25B 9/00 (2013.01); F25B 9/008 (2013.01); F25B 41/00 (2013.01); F25B 41/04 (2013.01); F25B 49/02 (2013.01); F25D 17/02 (2013.01); F25D 21/10 (2013.01); F25D 21/12 (2013.01); F25D 21/14 (2013.01); F25B 23/006 (2013.01); F25B 25/00 (2013.01); F25B 2339/047 (2013.01); F25B 2347/022 (2013.01); F25B 2400/072 (2013.01); F25B 2400/13 (2013.01);
Abstract

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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