Automated drive for fan and refrigerant system

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

Patent

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Details

F25B 41/00 (2006.01) F16H 9/00 (2006.01) F25B 49/02 (2006.01)

Patent

CA 2616273

A refrigerant system is provided with a variable speed drive for at least one of its fluid-moving devices, wherein the variable speed drive is provided by an automated mechanical drive. In the disclosed embodiment, one of the pulleys for driving the fluid-moving device has a variable diameter to vary the speed at which the fluid-moving device is driven. The pulley may include two plates that are biased in one direction by a spring or permanent magnet force, and in an opposed direction by a hydraulic or electro-magnetic force. A control adjusts the amount of hydraulic or electro-magnetic force delivered to the plates to achieve a desired speed for the fluid-moving device.

L'invention concerne un système réfrigérant équipé d'un variateur de vitesse pour au moins un de ses dispositifs de déplacement de fluide. Le variateur de vitesse est muni d'une commande mécanique automatisée. Dans le mode de réalisation décrit, une des poulies servant à entraîner le dispositif de déplacement de fluide est menée. La poulie peut comprendre deux plaques sollicitées dans un sens par une force de rappel ou à aimant permanent, et dans un sens opposé par une force hydraulique ou électromagnétique. Un régulateur règle l'intensité de la force hydraulique ou électromagnétique exercée sur les plaques afin d'établir une vitesse désirée pour le dispositif de déplacement de fluide.

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