Heat pump system having a maximum percent demand re-calculation algorithm controller
First Claim
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1. A heat pump (HP) system, comprising:
- an indoor system comprising an indoor heat exchanger equipped with an indoor blower;
an outdoor system comprising an outdoor heat exchanger equipped with an outdoor fan, said indoor system and said outdoor system being fluidly coupled together by refrigerant tubing that forms a refrigerant system;
an operating parameter sensor associated with said indoor system or said outdoor system and configured to provide an operating parameter signal of said indoor system or said outdoor system; and
a controller coupled to said HP system, wherein, prior to receiving a refrigerant high pressure trip signal from a refrigerant high pressure trip sensor, the controller is configured to;
operate said HP system based on a first maximum heating % demand;
determine whether said operating parameter signal indicates that a current heating % demand exceeds said first maximum heating % demand;
responsive to a determination that said operating parameter signal indicates that the current heating % demand exceeds said first maximum heating % demand, set said first maximum heating % demand to a second maximum heating % demand that is greater than said first maximum heating % demand and operate said HP system based on said second maximum heating % demand;
wherein said controller sets said first maximum heating % demand as follows;
first maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N}, wherein;
first maximum heating % demand is an initial maximum limit heating % demand of said HP system, ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate=indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers; and
wherein said controller sets said second maximum heating % demand as follows;
second maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N}, wherein;
second maximum heating % demand is the maximum heating % demand after recalculation of said first maximum heating % demand of said HP system, ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate=indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers selected such that said second maximum heating % demand value is greater than said first maximum heating % demand.
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Abstract
One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the HP system based on the second maximum heating % demand.
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Citations
14 Claims
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1. A heat pump (HP) system, comprising:
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an indoor system comprising an indoor heat exchanger equipped with an indoor blower; an outdoor system comprising an outdoor heat exchanger equipped with an outdoor fan, said indoor system and said outdoor system being fluidly coupled together by refrigerant tubing that forms a refrigerant system; an operating parameter sensor associated with said indoor system or said outdoor system and configured to provide an operating parameter signal of said indoor system or said outdoor system; and a controller coupled to said HP system, wherein, prior to receiving a refrigerant high pressure trip signal from a refrigerant high pressure trip sensor, the controller is configured to; operate said HP system based on a first maximum heating % demand; determine whether said operating parameter signal indicates that a current heating % demand exceeds said first maximum heating % demand; responsive to a determination that said operating parameter signal indicates that the current heating % demand exceeds said first maximum heating % demand, set said first maximum heating % demand to a second maximum heating % demand that is greater than said first maximum heating % demand and operate said HP system based on said second maximum heating % demand; wherein said controller sets said first maximum heating % demand as follows;
first maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N},wherein; first maximum heating % demand is an initial maximum limit heating % demand of said HP system, ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate=indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers; and wherein said controller sets said second maximum heating % demand as follows;
second maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N},wherein; second maximum heating % demand is the maximum heating % demand after recalculation of said first maximum heating % demand of said HP system, ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate=indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers selected such that said second maximum heating % demand value is greater than said first maximum heating % demand. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A heat pump (HP) system controller, comprising:
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a control board; a microprocessor located on and electrically coupled to said control board; and a memory coupled to said microprocessor and located on and electrically coupled to said control board and having a controller couplable to an operating parameter sensor associated with an indoor system or an outdoor system of a heat pump (HP) system; wherein, prior to receiving a refrigerant high pressure trip signal from a refrigerant high pressure trip sensor, said controller is configured to; operate said HP system based on a first maximum heating % demand; determine whether an operating parameter signal indicates that a current heating % demand exceeds said first maximum heating % demand; responsive to a determination that said operating parameter signal indicates that the current heating % demand exceeds said first maximum heating % demand, set said first maximum heating % demand to a second maximum heating % demand that is greater than said first maximum heating % demand and operate said HP system based on said second maximum heating % demand; wherein said controller sets said first maximum heating % demand as follows;
first maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N},wherein; first maximum heating % demand is an initial maximum limit heating % demand of said HP system, ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate=indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers; and wherein said controller sets said second maximum heating % demand as follows;
second maximum heating % demand/% indoor airflow rate=A+{B×
((ODT_ref+C)/(ODT+D))^N},wherein; second maximum heating % demand is the maximum heating % demand after recalculation % demand of said HP system, of said first maximum heating ODT_ref is a reference outdoor temperature in degrees Fahrenheit adjusted for a given HP system, ODT is the outdoor temperature in degrees Fahrenheit, % indoor airflow rate indoor airflow rate/indoor airflow rate @100% heating demand, where indoor airflow rate is airflow output of the indoor system, and where A, B, C, D, and N are real numbers selected such that said second maximum heating % demand value is greater than said first maximum heating % demand. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification