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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 10302343 B1

PDFFull Text
Date of Patent:
May. 28, 2019

Filed:

Nov. 25, 2014

Defrost system for refrigeration apparatus, and cooling unit

Applicant:

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

Inventors:

Choiku Yoshikawa, Tokyo, JP;

Makoto Sano, Tokyo, JP;

Iwao Terashima, Tokyo, JP;

Daiki Kayashima, Tokyo, JP;

Assignee:

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

Attorney:

Rossi, Kimms & McDowell LLP

Primary Examiner:

Keith M Raymond

Assistant Examiner:

Kamran Tavakoldavani

Int. Cl.
CPC ...
F25D 21/06 (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 41/00 (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 defrost system is disclosed that includes a cooling device disposed in a freezer, a heat exchanger pipe leading into a casing, a drain receiver unit; a refrigerating device for cooling and liquefying COrefrigerant; a refrigerant circuit for permitting the COrefrigerant to circulate to the heat exchanger pipe; a defrost circuit branched from the heat exchanger pipe forming a COcirculation path with the heat exchanger pipe; an on-off valve so that the COcirculation path becomes a closed circuit; a pressure adjusting unit for adjusting the pressure of the COrefrigerant; and a first heat exchanger unit for heating the COrefrigerant circulating with brine, disposed below the cooling device to which the defrost circuit and a first brine circuit in which brine, a first heating medium, circulates, are led, in which the COrefrigerant naturally circulates in the closed circuit when defrosting by a thermosiphon effect.

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