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:
Aug. 03, 2004
Filed:
Oct. 25, 2001
Phillip Ryan Wagner, Baltimore, OH (US);
John Gilman Chapman, Jr., Delaware, OH (US);
Ranco Incorporated of Delaware, Wilmington, DE (US);
Abstract
A heating, ventilation and air conditioning (HVAC) device ( ) which includes both heating and cooling operating modes provides an easy-to-use interface ( ) for selecting the operating parameters of the device ( ). The interface ( ) allows the input of a setpoint temperature at which the HVAC device ( ) conditions the ambient temperature of a space ( ). A mode switch-over algorithm ( ) uses the setpoint temperature, the sensed temperature from the conditioned space, and prestored threshold values that depend on the device's operating capacities, to determine when to change the device between heating and cooling modes. Also, within each of the respective modes, a heating ( ) or cooling ( ) algorithm controls the engaging and disengaging of the heating and cooling elements of the device ( ) to maintain the temperature of the conditioned space ( ) within a desired comfort zone.