EP 2135017 A4 20100310 - PREVENTION OF REFRIGERANT SOLIDIFICATION
Title (en)
PREVENTION OF REFRIGERANT SOLIDIFICATION
Title (de)
VERHINDERUNG VON KÄLTEMITTELERSTARRUNG
Title (fr)
PRÉVENTION DE LA SOLIDIFICATION D'UN FLUIDE FRIGORIGÈNE
Publication
Application
Priority
US 2007063662 W 20070309
Abstract (en)
[origin: WO2008111968A1] A refrigerant system may utilize CO<SUB>2</SUB> as a refrigerant. Should the sensed operating conditions indicate that the refrigerant might be approaching a condition at which the refrigerant could solidify, corrective actions are taken to prevent refrigerant transformation to a solid thermodynamic state. In one embodiment, hot gas from a compressor discharge is bypassed to a location upstream of the evaporator. In another embodiment, the high-side pressure of a refrigerant system is adjusted. In yet another embodiment, an additional charge of refrigerant is delivered on demand into the refrigerant system. In still another embodiment, a defrost cycle is initiated on demand. These embodiments prevent the refrigerant from approaching the conditions at which it may solidify.
IPC 8 full level
F25B 41/00 (2006.01); F25B 9/00 (2006.01); F25B 49/00 (2006.01)
CPC (source: EP US)
F25B 9/008 (2013.01 - EP US); F25B 49/005 (2013.01 - EP US); F25B 2309/06 (2013.01 - EP US); F25B 2600/2501 (2013.01 - EP US); F25B 2700/197 (2013.01 - EP US); F25B 2700/2117 (2013.01 - EP US); F25D 21/06 (2013.01 - EP US)
Citation (search report)
- [XI] US 5042262 A 19910827 - GYGER ROGER F [US], et al
- [A] EP 1422487 A2 20040526 - YORK REFRIGERATION APS [DK]
- [A] JP 2004308972 A 20041104 - MAEKAWA SEISAKUSHO KK
- [E] EP 1939548 A1 20080702 - MAEKAWA SEISAKUSHO KK [JP], et al
- [A] US 5199275 A 19930406 - MARTIN PATRICK S [US]
- See references of WO 2008111968A1
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 2008111968 A1 20080918; CN 101663546 A 20100303; CN 101663546 B 20111116; EP 2135017 A1 20091223; EP 2135017 A4 20100310; HK 1141579 A1 20101112; US 2010011787 A1 20100121
DOCDB simple family (application)
US 2007063662 W 20070309; CN 200780052086 A 20070309; EP 07758235 A 20070309; HK 10107852 A 20100817; US 52771907 A 20070309