EP 2162686 A1 20100317 - 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)
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
Designated extension state (EPC)
AL BA HR MK RS
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