EP 2024691 A1 20090218 - SYSTEM AND METHOD FOR REDUCING WINDAGE LOSSES IN COMPRESSOR MOTORS
Title (en)
SYSTEM AND METHOD FOR REDUCING WINDAGE LOSSES IN COMPRESSOR MOTORS
Title (de)
SYSTEM UND VERFAHREN ZUR VERRINGERUNG VON LÜFTUNGSVERLUSTEN IN VERDICHTERMOTOREN
Title (fr)
SYSTÈME ET PROCÉDÉ DE RÉDUCTION DES PERTES DE TOURBILLONNEMENT DANS LES MOTEURS À COMPRESSEUR
Publication
Application
Priority
- US 2007011568 W 20070515
- US 41986206 A 20060523
Abstract (en)
[origin: US2007271956A1] A method and system for reducing windage losses in compressor motors is provided. The compressor motor is cooled by circulating refrigerant from a closed refrigerant loop incorporating the compressor. A pumping device coupled to a liquid expander in the closed refrigerant loop circulates refrigerant through the motor cavity and produces a motor cavity pressure lower than evaporating pressure. The lower pressure in the motor cavity reduces the density of the gasses in the motor cavity, resulting in reduced windage losses of the motor. Additionally, the pumping device is powered by the recovered liquid expansion energy between the condenser and the evaporator.
IPC 8 full level
F25B 11/04 (2006.01); F25B 31/00 (2006.01)
CPC (source: EP KR US)
F04D 13/04 (2013.01 - EP US); F04D 25/06 (2013.01 - EP US); F04D 29/5806 (2013.01 - EP US); F04D 29/584 (2013.01 - US); F25B 11/04 (2013.01 - EP KR US); F25B 31/00 (2013.01 - KR); F25B 31/006 (2013.01 - EP US); F25B 2400/14 (2013.01 - EP US)
Citation (search report)
See references of WO 2007139692A1
Designated contracting state (EPC)
DE FR GB
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
US 2007271956 A1 20071129; CN 101473174 A 20090701; EP 2024691 A1 20090218; JP 2009538398 A 20091105; KR 20090016583 A 20090216; TW 200819692 A 20080501; WO 2007139692 A1 20071206
DOCDB simple family (application)
US 41986206 A 20060523; CN 200780022669 A 20070515; EP 07794855 A 20070515; JP 2009512039 A 20070515; KR 20087030378 A 20081212; TW 96118030 A 20070521; US 2007011568 W 20070515