Defrost system and method for heat pumps

Details Defrost system and method for heat pumps Defrost system and method for heat pumps

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 47/02 (2006.01) F25B 30/02 (2006.01) F25B 41/04 (2006.01) F25B 49/02 (2006.01)

Patent

CA 2754201

A system and method for defrosting an air source heat pump are presented. A defrost conduit extends from the discharge from a system compressor to the outdoor coil. The defrost conduit includes a normally closed defrost valve. When the need for defrost exists, the defrost valve is opened, and warm refrigerant is delivered from the compressor discharge to the outdoor coil to effect defrost of the outdoor coil.

L'invention porte sur un système et un procédé de dégivrage d'une pompe à chaleur utilisant l'air comme source froide. Un conduit de dégivrage s'étend de la décharge d'un compresseur de système au serpentin extérieur. Le conduit de dégivrage comprend une soupape de dégivrage normalement fermée. Lorsqu'il existe un besoin de dégivrage, la soupape de dégivrage est ouverte, et du liquide réfrigérant chaud est délivré de la décharge de compresseur au serpentin extérieur pour effectuer un dégivrage du serpentin extérieur.

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