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:
May. 27, 2008
Filed:
Jan. 20, 2004
William F. Van Ostrand, Indianapolis, IN (US);
Rajendra K. Shah, Indianapolis, IN (US);
Laurie L. Werbowsky, Jamesville, NY (US);
William F. Van Ostrand, Indianapolis, IN (US);
Rajendra K. Shah, Indianapolis, IN (US);
Laurie L. Werbowsky, Jamesville, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A control for controlling a multi-zone HVAC system, wherein the heating or cooling equipment is operable in multiple stages, takes the demand on the system over time into account when determining an appropriate stage. In particular, a time integral of the system demands is utilized along with a current system demand to determine an appropriate stage. In this manner, a weakness in the prior art of allowing a long-term, small difference between the desired set point and the actual temperature in the various zones is addressed.