The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2014
Filed:
Oct. 04, 2011
Paul H. Haley, Coon Valley, WI (US);
Dennis R. Dorman, La Crosse, WI (US);
Frederic Byron Hamm, Jr., Onalaska, WI (US);
David M. Foye, La Crosse, WI (US);
James A. Kwiatkowski, Stoddard, WI (US);
Rick T. James, La Crescent, MN (US);
Randall L. Janssen, La Crosse, WI (US);
William J. Plzak, La Crescent, MN (US);
Paul H. Haley, Coon Valley, WI (US);
Dennis R. Dorman, La Crosse, WI (US);
Frederic Byron Hamm, Jr., Onalaska, WI (US);
David M. Foye, La Crosse, WI (US);
James A. Kwiatkowski, Stoddard, WI (US);
Rick T. James, La Crescent, MN (US);
Randall L. Janssen, La Crosse, WI (US);
William J. Plzak, La Crescent, MN (US);
Trane International, Inc., Piscataway, NJ (US);
Abstract
A centrifugal compressor assembly for compressing refrigerant in a 250-ton capacity or larger chiller system comprising a motor, preferably a compact, high energy density motor or permanent magnet motor, for driving a shaft at a range of sustained operating speeds under the control of a variable speed drive. Another embodiment of the centrifugal compressor assembly comprises a mixed flow impeller and a vaneless diffuser sized such that a final stage compressor operates with an optimal specific speed range for targeted combinations of head and capacity, while a non-final stage compressor operates above the optimum specific speed of the final stage compressor. Another embodiment of the centrifugal compressor assembly comprises an integrated inlet flow conditioning assembly to condition flow of refrigerant into an impeller to achieve a target approximately constant angle swirl distribution with minimal guide vane turning.