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:
Dec. 19, 2017
Filed:
Oct. 04, 2013
Load estimator for control of vapor compression cooling system with pumped refrigerant economization
Applicant:
Liebert Corporation, Columbus, OH (US);
Inventors:
Zongtao Lu, Pittsburgh, PA (US);
Greg Haggy, Pickerington, OH (US);
Timothy J. Schrader, Irwin, OH (US);
Stephen Sillato, Westerville, OH (US);
John F. Judge, Galena, OH (US);
Assignee:
Liebert Corporation, Columbus, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 49/02 (2006.01); H05K 7/20 (2006.01); F25B 23/00 (2006.01); F25B 41/04 (2006.01);
U.S. Cl.
CPC ...
F25B 49/02 (2013.01); F25B 23/00 (2013.01); H05K 7/20827 (2013.01); H05K 7/20836 (2013.01); F25B 41/043 (2013.01); F25B 2400/0401 (2013.01); F25B 2400/0403 (2013.01); F25B 2400/0411 (2013.01); F25B 2600/2501 (2013.01);
Abstract
A cooling system has a direct expansion mode and a pumped refrigerant economizer mode and a controller. The controller includes a load estimator that estimates real-time indoor load on the cooling system and uses the estimated real-time indoor load to determine whether to operate the cooling system in the pumped refrigerant economizer mode or in the direct expansion mode.