EP 1996875 A1 20081203 - HEAT PUMP WITH PULSE WIDTH MODULATION CONTROL
Title (en)
HEAT PUMP WITH PULSE WIDTH MODULATION CONTROL
Title (de)
WÄRMEPUMPE MIT PULSBREITENMODULATIONSSTEUERUNG
Title (fr)
POMPE A CHALEUR AVEC COMMANDE A MODULATION DE LARGEUR D'IMPULSIONS
Publication
Application
Priority
US 2005045810 W 20051216
Abstract (en)
[origin: WO2007070060A1] A heat pump is provided with a component that has a pulse width modulation control to adjust system capacity. Thus, by utilizing a pulse width modulation technique to control this component, the present invention is able to closely tailor the delivered capacity of the heat pump to that which is demanded, without cycling the unit. In one embodiment, the component has a suction pulse width modulation valve. In another embodiment, the component which is modulated is the compressor pump unit, and, in particular, a pair of scroll members that are allowed to move into and out of contact with each other. The pulse width modulation control device can also be utilized in combination with a heat pump having an economizer function and/or an unloader function.
IPC 8 full level
F25B 1/00 (2006.01); F25B 13/00 (2006.01); F25B 41/00 (2006.01); F25B 49/00 (2006.01)
CPC (source: EP US)
F25B 13/00 (2013.01 - EP US); F25B 41/22 (2021.01 - EP US); F25B 1/04 (2013.01 - EP US); F25B 2313/02741 (2013.01 - EP US); F25B 2313/02742 (2013.01 - EP US); F25B 2400/13 (2013.01 - EP US); F25B 2400/23 (2013.01 - EP US); F25B 2600/0261 (2013.01 - EP US); F25B 2600/2521 (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 NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007070060 A1 20070621; CN 101341367 A 20090107; EP 1996875 A1 20081203; EP 1996875 A4 20110119; US 2008209930 A1 20080904
DOCDB simple family (application)
US 2005045810 W 20051216; CN 200580052317 A 20051216; EP 05854510 A 20051216; US 8887908 A 20080401