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US 7,918,655 B2Granted
Fixed and variable compressor system capacity control
AssigneeComputer Process Controls, Inc.
InventorsErnest P. Hurst, Jr., Hung M. Pham
Life of this patent
Estimating the term…
Abstract
A compressor control system includes at least one variable compressor, at least one fixed-capacity compressor, and a controller. The controller modulates the variable compressor based on a suction pressure reading of the variable compressor. In addition, the controller selectively toggles the fixed-capacity compressor between a run mode and a shutdown mode based on an operating parameter of the variable compressor.
Claims20
A compressor control system comprising:
- at least one variable-capacity compressor;
- at least one fixed-capacity compressor;
- and
- a controller operable to control a combined compressor capacity of said at least one variable-capacity compressor and said at least one fixed-capacity compressor by continuously modulating said at least one variable-capacity compressor to a determined capacity percentage and by selectively operating said at least one fixed-capacity compressor in a run mode or a shutdown mode, said controller increasing said combined compressor capacity by decreasing said determined capacity percentage of said at least one variable-capacity compressor before initiating said run mode for said at least one fixed-capacity compressor.
1 more element
The controller of Clam 14, wherein said module is operable to communicate said compressor operating conditions to said controller.
Dependencies are inferred from the claim text.