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. 09, 2019
Filed:
Apr. 21, 2011
Tejendra Patel, Ellington, CT (US);
Jeffrey Ernst, Wethersfield, CT (US);
Bruce R. Schroder, Agawam, MA (US);
Robert M. Deroy, Tolland, CT (US);
Kokjovi Coussey, Manchester, CT (US);
Tejendra Patel, Ellington, CT (US);
Jeffrey Ernst, Wethersfield, CT (US);
Bruce R. Schroder, Agawam, MA (US);
Robert M. DeRoy, Tolland, CT (US);
Kokjovi Coussey, Manchester, CT (US);
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Abstract
An electronic expansion valve (EEV) is employed in refrigeration systems to regulate the flow of refrigerant through an evaporator. The position of the EEV is controlled through a first control loop that generates a first position signal based on superheat feedback associated with the refrigeration system, and a second control loop that generates a second position signal based on pressure feedback associated with the refrigeration system. The larger of the first position signal and the second position signal is selected to control the position of the EEV value, and the selected position signal is provided in feedback to both the first control loop and the second control loop.