(19)
(11) EP 3 040 645 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.11.2016 Bulletin 2016/44

(43) Date of publication A2:
06.07.2016 Bulletin 2016/27

(21) Application number: 15202000.4

(22) Date of filing: 22.12.2015
(51) International Patent Classification (IPC): 
F25B 7/00(2006.01)
 F25B 9/00(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 22.12.2014 US 201414578668

(71) Applicant: Heatcraft Refrigeration Products LLC
Richardson, TX 75080 (US)

(72) Inventors:
  • DELVENTURA, Robert
    Stone Mountain, GA Georgia 30087 (US)
  • CHAPARRO, Ignacio Varela
    Columbus, GA Georgia 31907 (US)
  • PFISTER, Steve
    Stone Mountain, GA Georgia 30087 (US)

(74) Representative: Gill Jennings & Every LLP 
The Broadgate Tower 20 Primrose Street
London EC2A 2ES
London EC2A 2ES (GB)

   


(54) CARBON DIOXIDE BASED AUXILIARY COOLING SYSTEM


(57) The present application provides a cascade refrigeration system (100). The cascade refrigeration system may include a first side cycle (110), a second side cycle (120) with a second side cycle carbon dioxide refrigerant (310), and an auxiliary cooling system (330) to cool the second side cycle carbon dioxide refrigerant in the event of a power outage. The auxiliary cooling system includes an auxiliary carbon dioxide refrigerant.







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