(19)
(11) EP 1 921 399 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.03.2010 Bulletin 2010/10

(43) Date of publication A2:
14.05.2008 Bulletin 2008/20

(21) Application number: 07254445.5

(22) Date of filing: 13.11.2007
(51) International Patent Classification (IPC): 
F25B 1/10(2006.01)
F25B 7/00(2006.01)
F25B 25/00(2006.01)
F25B 43/00(2006.01)
 F25B 5/02(2006.01)
F25B 9/00(2006.01)
F25B 40/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 13.11.2006 US 858624 P

(71) Applicant: Hussmann Corporation
Bridgeton Missouri 63044-4283 (US)

(72) Inventor:
  • Shapiro, Doron
    St. Louis, MO 63119 (US)

(74) Representative: Holmes, Matthew Peter et al
Marks & Clerk LLP Sussex House
83-85 Mosley Street Manchester M2 3LG
83-85 Mosley Street Manchester M2 3LG (GB)

   


(54) Two stage transcritical refrigeration system


(57) The invention provides a refrigeration system (100) including a plurality of refrigerated display cases (115). Each display case has a dedicated evaporator assembly (165) that cools return air by evaporating a refrigerant, and a first stage compressor assembly (120) that is in fluid communication with the respective evaporator assembly to compress the refrigerant to a first pressure corresponding to a first temperature of the refrigerant prior to discharge of the compressed refrigerant. The refrigeration system also includes a second stage compressor assembly (125) that is in fluid communication with the first stage compressor assemblies (120) to compress the refrigerant to a second pressure that is higher than the first pressure, and that corresponds to a second temperature of the refrigerant. The refrigeration system (100) further includes a heat exchanger (130) that is in fluid communication with the second stage compressor assembly (125) to receive the refrigerant from the second stage compressor assembly to reject heat from the refrigerant.







Search report