Method and apparatus for controlling the removal of heat...

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

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F25B 49/02 (2006.01) F25B 41/06 (2006.01)

Patent

CA 2436217

This invention increases efficiency of a refrigeration system (10) by maximizing the cooling of the condenser (14) and reducing unnecessary work done by the compressor (12). In air cooled systems it will also increase the stability of the fans (16) by reducing fan cycling. The fan controller (24) will utilize an algorithm that will consider the following inputs: oil pressure, compressor suction pressure, expansion valve position, compressor loading, last compressor loading change, and current fan stage. The algorithm uses fuzzy logic to characterize the inputs and generates an output that controls the system cooling fans (16).

La présente invention vise à augmenter l'efficacité d'un système de réfrigération (10) par optimisation du refroidissement du condenseur (14) et élimination des efforts superflus du compresseur (12). Dans le cas des systèmes refroidis par l'air, l'invention permet également d'augmenter la stabilité des soufflantes (16) par une réduction de leur cycle. Le régulateur des soufflantes (24) met en oeuvre un algorithme tenant compte de la pression d'huile, de la pression d'aspiration des compresseurs, de la position du détendeur, de la charge du compresseur, de la dernière variation de charge du compresseur, et du régime actuel de la soufflante. L'algorithme utilisé pour caractériser les entrées et produire une sortie de commande des soufflantes de refroidissement du système (16) est un algorithme à logique floue.

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