Air-conditioning apparatus

F - Mech Eng,Light,Heat,Weapons – 24 – F

Patent

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Details

F24F 5/00 (2006.01) F25B 13/00 (2006.01) F25B 30/06 (2006.01) F25B 47/02 (2006.01)

Patent

CA 2056325

An air-conditioning apparatus forms a refrigerating cycle with a coolant heater and a compressor having two cylinders. The apparatus simultaneously carries out a coolant heating operation and a heat pump operation when a required heating capacity is high, and when the required heating capacity is low, only the heat pump operation. This operation technique helps reduce the size of the apparatus and expand a variable width of heating capacity. The apparatus also has a defrosting unit for defrosting an outdoor heat exchanger during the heat pump operation.

La présente invention a pour objet un système de conditionnement d'air avec cycle de réfrigération, lequel comporte un réchauffeur de frigorigène ainsi qu'un compresseur à deux cylindres. Le système en question effectue simultanément des opérations de chauffage du frigorigène et de pompage thermique lorsque la demande de chauffage est élevée et de pompage thermique seulement lorsque la demande de chauffage est faible. Ce mode de fonctionnement contribue à réduire l'encombrement du système et accroît la plage de capacité de chauffage. Le système comporte également un appareil de dégivrage assurant le dégivrage d'un échangeur de chaleur extérieur durant le fonctionnement de la pompe.

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