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US 10,914,503 B2Granted
Coil heating systems for heat pump systems
AssigneeJohnson Controls Technology Company
InventorJay C. Walser
Life of this patent
Estimating the term…
Abstract
A heat pump system includes a heat exchanger coil and a heater configured to transfer heat to the heat exchanger coil. The heat pump system also includes a controller communicatively coupled to the heater. The controller is configured to activate the heater in response to determining that a detected temperature of the heat exchanger coil is below a threshold temperature for a threshold time period.
Claims26
A heat pump system, comprising:
- an outdoor heat exchanger coil configured to operate as an evaporator in both a heating mode and an outdoor unit defrost mode of the heat pump system;
- a heater configured to transfer heat to the outdoor heat exchanger coil;
- and
- a controller communicatively coupled to the heater, wherein the controller is configured to activate the heater in response to determining that a detected temperature of the outdoor heat exchanger coil is below a threshold temperature for a threshold number of successive detections.
1 more element
A heat pump system, comprising:
- an outdoor heat exchanger comprising a coil configured to circulate a refrigerant in a common direction in both a heating mode and an outdoor unit defrost mode of the heat pump system;
- a heater configured to transfer heat to the coil when activated and comprising a resistive coating disposed on the coil;
- and
- a controller communicatively coupled to the heater and configured to activate the heater in the outdoor unit defrost mode in response to determining that a detected temperature of the coil is below a threshold temperature for a threshold number of successive detections.
1 more element
A heat pump system, comprising:
- an outdoor heat exchanger coil;
- a resistive heater configured to transfer heat to the outdoor heat exchanger coil when activated and comprising a resistive coating disposed on the outdoor heat exchanger coil;
- and
- a controller communicatively coupled to the resistive heater and configured to:
- activate the resistive heater in an outdoor unit defrost mode in response to determining that a parameter of the heat pump system is outside of a threshold parameter range for a threshold time period;
- and
- activate the resistive heater in a heating mode of the heat pump system in response to a request for supplemental heating of a conditioned interior space.
4 more elements
Dependencies are inferred from the claim text.