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:
Apr. 19, 2016
Filed:
Apr. 13, 2012
Zhiyong Lin, Columbus, OH (US);
Roger Noll, Gahanna, MI (US);
John F. Judge, Galena, OH (US);
Gary A. Helmink, Galloway, OH (US);
Benedict J. Dolcich, Westerville, OH (US);
Daniel J. Schutte, Lewis Center, OH (US);
Timothy J. Schrader, Irwin, OH (US);
Zhiyong Lin, Columbus, OH (US);
Roger Noll, Gahanna, MI (US);
John F. Judge, Galena, OH (US);
Gary A. Helmink, Galloway, OH (US);
Benedict J. Dolcich, Westerville, OH (US);
Daniel J. Schutte, Lewis Center, OH (US);
Timothy J. Schrader, Irwin, OH (US);
Liebert Corporation, Columbus, OH (US);
Abstract
A cooling system has a plurality of separate cooling stages including an upstream cooling stage having an upstream cooling circuit and a downstream cooling stage including a downstream cooling circuit, which are each a direct expansion cooling circuit including a tandem compressor. Each tandem compressor includes a fixed capacity compressor and a variable capacity compressor. A controller controls the fixed capacity compressor and variable capacity compressor of each tandem compressor based on a Call for Cooling, which of a plurality of ranges the Call for Cooling falls within, and whether the Call for Cooling is ramping up or ramping down.