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AssigneeGas Research Institute
InventorsSteven R. Hoglund, Kerry E. Ober, Philip J. Zumsteg, James M. Tuten, III, James R. Harnish, Jay R. Goetz
Estimating the term…
A controller for a gas heat pump system wherein the controller has a variable capacity control capability that responds to thermostat output signals. The variable capacity controller computes real-time performance parameters at variable capacity heating/cooling load conditions of the gas heat pump system. A defrost controller calculates a maximum heat pump operating time period between successive defrost cycles and a minimum heat pump operating time period of each defrost cycle, during a heating mode of the gas heat pump. Such values are calculated as a function of sensed time, temperature and variable capacity operating conditions which are calculated by the variable capacity controller. The controller preferably has a manual mode for verifying correct operation of each actuator of the gas heat pump system, as a function of a sequenced input signal, while the gas heat pump system is in a shutdown mode. The manual mode control also computes and generates an output signal for controlling each actuator to achieve efficient operation control of the gas heat pump system in various operational states, based upon predetermined operating parameters.
In a gas heat pump system having a variable speed compressor, a controller comprising:
In a gas heat pump system having a variable speed compressor, a controller comprising variable capacity control means for computing a compressor speed, an indoor blower speed, and an outdoor fan speed of said gas heat pump system as a function of at least one thermostat output signal in real-time at variable capacity heating/cooling load requirements of the gas heat pump system.
In a gas heat pump system having a variable speed compressor, a controller comprising defrost control means for calculating a maximum heat pump operating time period between successive defrost cycles and a minimum heat pump operating time period of each said defrost cycle during a heating mode of the gas heat pump system as a function of a sensed time, a sensed time to defrost select input, a temperature, and variable capacity operating conditions, and said controller communicating with at least one component of said gas heat pump system for overall control of said gas heat pump system.
In a gas heat pump system having a variable speed compressor, a controller comprising variable capacity control means for computing a compressor speed, an indoor blower speed, and an outdoor fan speed of said gas heat pump system as a function of at least one thermostat output signal in real-time at variable capacity heating/cooling load requirements of the gas heat pump system, engine control means for directly controlling and monitoring an engine of said gas heat pump system, and said engine control means interfaced with said variable capacity control means for exchanging commands from said controller and data from said engine control means.
Dependencies are inferred from the claim text.