EP 2162686 A4 20130522 - REFRIGERANT SYSTEM WITH CASCADED CIRCUITS AND PERFORMANCE ENHANCEMENT FEATURES
Title (en)
REFRIGERANT SYSTEM WITH CASCADED CIRCUITS AND PERFORMANCE ENHANCEMENT FEATURES
Title (de)
KÄLTEMITTELSYSTEM MIT KASKADENKREISLÄUFEN UND LEISTUNGSVERBESSERUNGSMERKMALEN
Title (fr)
SYSTÈME RÉFRIGÉRANT AVEC CIRCUITS EN CASCADE ET CARACTÉRISTIQUES D'AMÉLIORATION DE PERFORMANCE
Publication
Application
Priority
US 2007070288 W 20070604
Abstract (en)
[origin: WO2008150289A1] An improved refrigerant system incorporates at least two circuits arranged in a cascaded relationship. Preferably, the upper circuit utilizes a hydrocarbon refrigerant and preferably the lower circuit utilizes CO2 refrigerant. Preferably, the CO2 cascaded circuit mainly operates in a subcritical region. To improve the efficiency and capacity control of the cascaded refrigerant system, at least one of the circuits is equipped with performance enhancement features such as, for example, an economized function provided by a flash tank or economizer heat exchanger. Additional enhancement features can also include a liquid-suction heat exchanger and bypass function.
IPC 8 full level
F25B 7/00 (2006.01)
CPC (source: EP US)
F25B 7/00 (2013.01 - EP US); F25B 1/10 (2013.01 - EP US); F25B 2309/06 (2013.01 - EP US); F25B 2400/12 (2013.01 - EP US); F25B 2400/13 (2013.01 - EP US)
Citation (search report)
- [XI] US 3733845 A 19730522 - LIEBERMAN D
- [XI] WO 2006027330 A1 20060316 - IARP S R L [IT], et al
- [X] EP 1701112 A1 20060913 - MITSUBISHI ELECTRIC CORP [JP]
- [X] WO 2006094969 A1 20060914 - SHELL INT RESEARCH [NL], et al
- [X] US 2004211193 A1 20041028 - VAN DER WALT NICHOLAS R [US], et al
- [X] CARETTA O: "HIGH EFFICIENCY, LOW CARBON SUPERMARKET REFRIGERATION", SCIENCE ET TECHNIQUE DU FROID - REFRIGERATION SCIENCE AND TECHNOLOGY, PARIS, FR, 29 August 2004 (2004-08-29), pages COMPLETE, XP000962588, ISSN: 0151-1637
- See references of WO 2008150289A1
Citation (examination)
- WO 2008112554 A1 20080918 - JOHNSON CONTROLS TECH CO [US], et al
- EP 0179225 A1 19860430 - TOSHIBA KK [JP]
- JP S5496853 A 19790731 - HITACHI LTD
- DE 3521060 A1 19851212 - SNAM PROGETTI [IT]
Designated contracting state (EPC)
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
DOCDB simple family (publication)
WO 2008150289 A1 20081211; CN 101755175 A 20100623; EP 2162686 A1 20100317; EP 2162686 A4 20130522; US 2010147006 A1 20100617
DOCDB simple family (application)
US 2007070288 W 20070604; CN 200780053241 A 20070604; EP 07798044 A 20070604; US 52864207 A 20070604