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(12)United States Patent Nemoto eta]. (10) Patent N0.: US 7,992,397 B2 Aug.9,2011 AMMONIA/CO2REFRIGERATIONSYSTEM, CO2 BRINE PRODUCTION SYSTEM FOR USE THEREIN,ANDAMMONIACOOLINGUNIT U.S.PATENTDOCUMENTS INCORPORATING THAT PRODUCTION SYSTEM (54) (75) (73) (*) (21) (22) (65) (63) ForeignApplicationPriorityData Nov.21,2003 (JP) ................................ 2003-391715 (56) ReferencesCited Inventors: TakashiNemoto,Koto-ku(JP);Akira Taniyama,Koto-ku(JP);Shinjirou Akaboshi,Koto-ku(JP);IWao Terashima,Koto-ku(JP) Assignee: MayekaWaMfg.Co.,Ltd.(JP) EP FOREIGN PATENT DOCUMENTS 1162414 * 12/2001 (Continued) OTHER PUBLICATIONS Notice: Subjecttoanydisclaimer,thetermofthis patent is extended or adjusted under 35 U.S.C. 154(b) by 442 days. MachinetranslationsofthefollowingPublicationsfromtheJPO Website:JP9-243186A Sep.16,1997Itoeta1.JP2002-243290A Aug. 28, 2002 Kuwako et al.* (Continued) Primary Examiner * FrantZ F Jules AssistantExaminer* FilipZec (74)Attorney,Agent,orFirm* Rossi,Kimms&McDoWell LLP (57) ABSTRACT An ammonia/CO2 refrigerationsystemisprovidedinWhich the ammonia cycle and CO2 brine cycle can be combined WithoutproblemsevenWhenrefrigerationloadsuchasrefrig erating shoWcase, etc. is located at any place in accordance With circumstances of customer’s convenience. The system comprises apparatuses Working on an ammonia refrigerating cycle, a brine cooler for cooling and condensing CO2 by utilizingthelatentheatofvaporizationoftheammonia, anda liquid pump provided in a supply line for supplying the cooledandlique?edCO2 toarefrigerationloadsidecooler, Whereinsaidliquidpump isavariable-dischargepump for allowingCO2 tobecirculatedforcibly,andtheforcedcircu lationHow isdeterminedsothatCO2 isrecoveredfromthe outletofthecooleroftherefrigerationloadsideinaliquidor liquid/gas mixed state. 24 Claims, 10 Drawing Sheets DEFROST HEATSOURCE -29 1 i i i i i Appl.N0.: 11/437,023 Filed: May 19,2006 Prior Publication Data US 2006/0266058A1 Nov.30,2006 Related US. Application Data ContinuationofapplicationNo.PCT/JP2004/000122, ?led on Jan. 9, 2004. (30) (51) Int.Cl. F25B 39/04 F25B 7/00 C09K 5/04 F25D 17/02 F25D 25/04 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) (52) US. Cl. .. 62/183; 62/114; 62/185; 62/335; 62/380;62/434 (58) Field of Classi?cation Search ................... 62/183, 62/114,185,380,434,335 See application ?le for complete search history. MACHINE UNITA / (45)Date ofPatent: US007992397B2 2,195,228 A * 3/1940 SchWarZ ........................ 62/113 (Continued)PDF Image | AMMONIA CO2 REFRIGERATION SYSTEM
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