Automated drive for fan and refrigerant system

Details Automated drive for fan and refrigerant system Automated drive for fan and refrigerant system

2005-08-09

2010-12-21

Jiang, Chen-Wen (Department: 3744)

Refrigeration

Automatic control

Of external fluid or means

C062S183000, C474S022000

Reexamination Certificate

active

07854136

ABSTRACT:
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.

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