System and method for evaluating changes in the efficiency of an HVAC system
DC CAFCFirst Claim
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1. A system for evaluating changes in the operational efficiency of an HVAC system over time comprising:
- at least one HVAC control system associated with a first structure that receives temperature measurements from at least a first structure conditioned by at least one HVAC system, and receives status of said HVAC system;
one or more processors that receive measurements of outside temperatures from at least one source other than said HVAC system and compare said temperature measurements from said first structure, wherein said one or more processors compares the inside temperature of said first structure and the outside temperature over time to derive an estimation for the rate of change in inside temperature of said first structure when said HVAC system is in a first state of repair; and
one or more databases that store at least said temperature measurements obtained from said first structure over time,wherein said one or more processors compares an inside temperature recorded inside the first structure with said estimation for the rate of change in inside temperature of said first structure to determine whether the operational efficiency of the HVAC system has decreased over time; and
wherein if said operational efficiency has decreased, said one or more processors analyzes the changes in the operational efficiency over time to suggest a cause of degradation.
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Abstract
The invention comprises systems and methods for evaluating changes in the operational efficiency of an HVAC system over time. The climate control system obtains temperature measurements from at least a first location conditioned by the climate system, and status of said HVAC system. One or more processors receives measurements of outside temperatures from at least one source other than said HVAC system and compares said temperature measurements from said first location with expected temperature measurements. The expected temperature measurements are based at least in part upon past temperature measurements.
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Citations
20 Claims
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1. A system for evaluating changes in the operational efficiency of an HVAC system over time comprising:
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at least one HVAC control system associated with a first structure that receives temperature measurements from at least a first structure conditioned by at least one HVAC system, and receives status of said HVAC system; one or more processors that receive measurements of outside temperatures from at least one source other than said HVAC system and compare said temperature measurements from said first structure, wherein said one or more processors compares the inside temperature of said first structure and the outside temperature over time to derive an estimation for the rate of change in inside temperature of said first structure when said HVAC system is in a first state of repair; and one or more databases that store at least said temperature measurements obtained from said first structure over time, wherein said one or more processors compares an inside temperature recorded inside the first structure with said estimation for the rate of change in inside temperature of said first structure to determine whether the operational efficiency of the HVAC system has decreased over time; and wherein if said operational efficiency has decreased, said one or more processors analyzes the changes in the operational efficiency over time to suggest a cause of degradation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for detecting and correcting for anomalous behavior in HVAC control systems comprising:
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a first HVAC control system that receives temperature measurements from at least a first structure conditioned by at least one HVAC system, and receives status of said HVAC system; at least a second HVAC control system that obtains temperature measurements from at least a second structure conditioned by a second HVAC system, and status of said second HVAC system; one or more processors that receive measurements of outside temperatures from at least one source other than said first and second HVAC systems and compare said temperature measurements from said first HVAC system and said second HVAC system and said outside temperature measurements over time to determine the relative efficiency of the first HVAC system and the second HVAC system; and one or more databases that store said temperatures measurements, wherein said one or more processors compares the relative efficiency of the first HVAC system and the second HVAC system to determine whether the operational efficiency of the first HVAC system has decreased over time; and wherein if said operational efficiency has decreased, said one or more processors analyzes the changes in the operational efficiency over time to suggest a cause of degradation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for evaluating changes in the operational efficiency of an HVAC system over time comprising:
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storing temperature measurements from at least a first structure conditioned by an HVAC system; and comparing with one or more processors said temperature measurements from said first structure with outside temperature measurements over time to derive expected temperature measurements of a rate of change in inside temperature of said first structure when the HVAC system is in a first state of repair wherein the expected temperature measurements are based at least in part upon past temperature measurements and based at least in part on outside temperature measurements, wherein said one or more processors compares an inside temperature recorded inside the first structure with said expected temperature measurements to determine whether the operational efficiency of the HVAC system has decreased. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification