Thermo-siphon chiller refrigerator for use in cold district

F - Mech Eng,Light,Heat,Weapons – 25 – B

Patent

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Details

F25B 1/00 (2006.01) F25B 25/00 (2006.01) F25B 41/00 (2006.01) F25B 41/04 (2006.01) F25B 23/00 (2006.01)

Patent

CA 2485757

In order to provide a thermo-siphon chiller refrigerator for use in cold districts which performs natural refrigerant-circulation refrigerating cycle and also can perform a forced refrigerant - circulation refrigerating cycle when outside air temperature is high by using an indoor heat exchanger, an outdoor heat exchanger, and a compressor, and combining them with refrigerant piping, the thermo-siphon chiller refrigerator for use in cold districts of the invention has a compressor(10) additionally installed to a natural refrigerant-circulation refrigerating system comprising an outdoor heat exchanger (12), an indoor heat exchanger(11) located at a position lower than that of the outer heat exchanger(12), and an expansion valve(18). When the refrigerating capacity of the natural refrigerant -circulation refrigerating system is not sufficient, the additional compressor(10) is operated to perform a forced refrigerant-circulation cycle i.e. a vapor compression refrigerating cycle.

L'invention concerne un réfrigérateur à appareil frigorifique à thermosiphon, prévu pour être utilisé dans les secteurs froids et capable de former un cycle frigorifique à circulation naturelle de fluide frigorigène, comprenant un échangeur thermique extérieur, un échangeur thermique intérieur et un compresseur, capable, par la combinaison de conduites de frigorigène, de fonctionner comme un système auxiliaire à circulation forcée et compression frigorifique, lorsque la température ambiante est élevée. Ce réfrigérateur se caractérise en ce que le compresseur (10) est installé additionnellement dans le cycle frigorifique à circulation naturelle de fluide frigorigène, comprenant ledit échangeur thermique extérieur (12), l'échangeur thermique intérieur (11), installé dans une position inférieure à celle de l'échangeur thermique extérieur, et un détendeur (18). Lorsque la température ambiante est élevée et la capacité du cycle frigorifique à circulation naturelle de fluide frigorigène est insuffisante, un cycle auxiliaire à circulation forcée et compression frigorifique est formé par le compresseur installé additionnellement (10).

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