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. 23, 2018
Filed:
Sep. 02, 2015
Applicant:
Lennox Industries Inc., Richardson, TX (US);
Inventors:
Yi Qu, Coppell, TX (US);
Carl Crawford, Hickory Creek, TX (US);
Assignee:
Lennox Industries Inc., Richardson, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 41/06 (2006.01); F25B 49/02 (2006.01); G05D 7/06 (2006.01); G05B 15/02 (2006.01); G05D 23/19 (2006.01); G05D 27/02 (2006.01);
U.S. Cl.
CPC ...
F25B 41/062 (2013.01); F25B 49/02 (2013.01); G05B 15/02 (2013.01); G05D 7/0629 (2013.01); G05D 23/19 (2013.01); G05D 27/02 (2013.01); F25B 2341/0653 (2013.01); F25B 2500/26 (2013.01); F25B 2600/21 (2013.01); F25B 2600/2513 (2013.01); F25B 2700/1933 (2013.01); F25B 2700/21151 (2013.01); Y02B 30/72 (2013.01);
Abstract
A vapor compression refrigeration cycle system includes a compressor and an electronic expansion valve connected between first and second refrigerant ports of a compressor. An expansion valve controller is configured to control a flow of refrigerant through the expansion valve in response to a superheat temperature of the refrigerant. The controller is configured to execute a first control algorithm until a local maximum of the superheat temperature occurs, and then to execute a second control algorithm.