Resources Contact Us Home
Method and apparatus for providing supplemental heating

Image Number 4 for United States Patent #5752654.

A heating system having a primary heat source such as a heat pump, and a supplemental heat source, such as a resistive heater, that is used to complement the heat generated by the primary heat source. Heat is generated by the entire supplemental heat source when the difference between a target temperature and the actual temperature for a space being heated exceeds an extreme predetermined threshold value. Heat is generated by a limited portion of the supplemental heat source when the difference is less than the extreme predetermined threshold value but is greater than another, less extreme, predetermined threshold value. The limited portion of the supplemental heat source is energized and de-energized as needed to generate the amount of heat necessary to achieve a duct temperature setpoint when combined with the heat from the primary heat source. The duct temperature setpoint is determined from a predetermined table of values based on the outside air temperature as indicated by the temperature of refrigerant flowing out of the outside heat exchanger. The predetermined table of values is stored in a storage device relating the duct temperature setpoint to the refrigerant temperature.

  Recently Added Patents
Provision of downlink packet access services to user equipment in spread spectrum communication network
Deposition apparatus and method for manufacturing organic light emitting diode display using the same
Irreversible thermochromic ink compositions
Myoglobin blooming agents, films, packages and methods for packaging
Sterilizable film for aseptic packaging
Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming method, and image forming apparatus
  Randomly Featured Patents
Apparatus and method for enabling content data to be copied or moved in accordance with desired time or capacity of a storage medium and a program thereof
Burnable wastes collector with liquid absorber and identifier
Method and apparatus for controlling the toner concentration in an electrographic process
Bolted post and beam
Ruminal fluid inoculation of calves
Prioritized communication between base station and mobile unit
Fire retardant polyester fibers
Actuator controller
Stack lifter for a blowout preventer
Hydraulic controlling device of working machine