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. 24, 2001
Filed:
Jun. 07, 1999
Robert K. Chaney, Jr., Garland, TX (US);
Mitchell R. Rowlette, Berea, KY (US);
Mark E. Miller, Versailles, KY (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An integrated heat pump and electrical heat control (,) has thermostat signal inputs (O, W,, W,, G, Y) along with a defrost sensor input (DF_IN). The defrost sensor (,) is located in an outdoor unit (,) which also includes a compressor contactor (CC), condenser fan (,) and reversing valve (,) relays (K,, K,, K,) controlled by micro-controller (U,). The normally closed condenser fan relay (K,) is energized through the defrost sensor forming a hardware lock-out in which the defrost sensor contacts must be closed for relay (K,) to be actuated de-energizing the condenser fan. The compressor contactor (CC) is energized through a low pressure switch (,) and high pressure switch (,) forming another hardware interlock. The evaporator fan is energized by relay (K,) controlled by micro-controller (U,) and matched to the compressor for improved efficiency and comfort.