ROBERT K CHANEY, III
Electrician at O Phelan Ln, Garland, TX
License number
Texas 155002
Expiration Date
Aug 1, 2017
Category
Apprentice Electrician
Address
Address
801 O Phelan Ln, Garland, TX 75044
Phone
(972) 495-6265
Professional information
Apparatus And Method For Control Of A Heat Pump System
US Patent:
6220043, Apr 24, 2001
Filed:
Jun 7, 1999
Appl. No.:
9/326911
Inventors:
Robert K. Chaney - Garland TX
Mitchell R. Rowlette - Berea KY
Mark E. Miller - Versailles KY
Mitchell R. Rowlette - Berea KY
Mark E. Miller - Versailles KY
Assignee:
Texas Instruments Incorporated - Dallas TX
International Classification:
F25B 4902
US Classification:
62182
Abstract:
An integrated heat pump and electrical heat control (12) has thermostat signal inputs (O, W1, W2, G, Y) along with a defrost sensor input (DF_IN). The defrost sensor (22) is located in an outdoor unit (4) which also includes a compressor contactor (CC), condenser fan (16) and reversing valve (18) relays (K4, K3, K2) controlled by micro-controller (U1). The normally closed condenser fan relay (K3) is energized through the defrost sensor forming a hardware lock-out in which the defrost sensor contacts must be closed for relay (K3) to be actuated de-energizing the condenser fan. The compressor contactor (CC) is energized through a low pressure switch (24) and high pressure switch (26) forming another hardware interlock. The evaporator fan is energized by relay (K1) controlled by micro-controller (U1) and matched to the compressor for improved efficiency and comfort.