Space comfort control detector
First Claim
1. A space comfort control detector for a heating or cooling system, comprising:
- a heating or cooling system for a space having an alert device;
a set point device connected to the heating or cooling system that allows changing a set point;
a temperature sensor situated in the space configured to sense a temperature in the space; and
a controller connected to the heating or cooling system, the set point device, and the temperature sensor; and
wherein;
the controller is configured to;
identify the set point for the heating or cooling system using the set point device;
obtain the temperature of the space using the temperature sensor;
identify a proportional error by determining a difference between the set point and the temperature of the space;
determine that an absolute value of the proportional error is greater than a proportional error threshold;
identify the heating or cooling system is not in a recovery state in response to determining that the absolute value of the proportional error is greater than the proportional error threshold, wherein identifying that the heating or cooling system is not in the recovery state is done by determining that a time since the set point device has been used to change the set point is greater than a recovery time threshold;
determine a rate of change of the absolute value of the proportional error in response to identifying that the heating or cooling system is not in the recovery state;
determine the rate of change is less than a proportional error rate of change threshold in response to determining the rate of change;
determine whether the absolute value of the proportional error will not be less than the proportional error threshold within a time limit in response to determining that the rate of change is less than the proportional error rate of change threshold; and
trigger an alert of the alert device that the heating or cooling system is not capable of maintaining the absolute value of the proportional error below the proportional error threshold in response to determining that the proportional error will not be less than the proportional error threshold within the time limit.
1 Assignment
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Accused Products
Abstract
A system for light commercial building solutions (LCBS). Solutions and other systems may incorporate lightweight alerting service, auto-adjustment of gateway poll rates based on the needs of various consuming applications, detecting loss of space comfort control in a heating, ventilation and air conditioning (HVAC) system, HVAC capacity loss alerting using relative degree days and accumulated stage run time with operational equivalency checks, and HVAC alerting for loss of heat or cool capacity using delta temperature and dependent system properties. Also, incorporated may be triggering s subset of analytics by automatically inferring HVAC equipment details from controller configuration details, ensuring reliability of analytics by retaining logical continuity of HVAC equipment operational data even when controllers and other parts of the system are replaced, and an LCBS gateway with workflow and mechanisms to associate to a contractor account.
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Citations
19 Claims
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1. A space comfort control detector for a heating or cooling system, comprising:
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a heating or cooling system for a space having an alert device; a set point device connected to the heating or cooling system that allows changing a set point; a temperature sensor situated in the space configured to sense a temperature in the space; and a controller connected to the heating or cooling system, the set point device, and the temperature sensor; and wherein; the controller is configured to; identify the set point for the heating or cooling system using the set point device; obtain the temperature of the space using the temperature sensor; identify a proportional error by determining a difference between the set point and the temperature of the space; determine that an absolute value of the proportional error is greater than a proportional error threshold; identify the heating or cooling system is not in a recovery state in response to determining that the absolute value of the proportional error is greater than the proportional error threshold, wherein identifying that the heating or cooling system is not in the recovery state is done by determining that a time since the set point device has been used to change the set point is greater than a recovery time threshold; determine a rate of change of the absolute value of the proportional error in response to identifying that the heating or cooling system is not in the recovery state; determine the rate of change is less than a proportional error rate of change threshold in response to determining the rate of change; determine whether the absolute value of the proportional error will not be less than the proportional error threshold within a time limit in response to determining that the rate of change is less than the proportional error rate of change threshold; and trigger an alert of the alert device that the heating or cooling system is not capable of maintaining the absolute value of the proportional error below the proportional error threshold in response to determining that the proportional error will not be less than the proportional error threshold within the time limit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer-implemented method for detecting a loss of space comfort control, comprising:
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identifying a set point for a heating or cooling system using a set point device; obtaining a temperature of a space using a temperature sensor; identifying a proportional error by determining a difference between the set point and the temperature of the space; determining that an absolute value of the proportional error is greater than a proportional error threshold; identifying the heating or cooling system is not in a recovery state in response to determining that the absolute value of the proportional error is greater than the proportional error threshold, wherein identifying that the heating or cooling system is not in the recovery state is done by determining that a time since a set point device has been used to change the set point is greater than a recovery time threshold; determining a rate of change of the absolute value of the proportional error in response to identifying that the heating or cooling system is not in the recovery state; determining the rate of change is less than a proportional error rate of change threshold in response to determining the rate of change; determining whether the absolute value of the proportional error will not be less than the proportional error threshold within a time limit in response to determining that the rate of change is less than the proportional error rate of change threshold; and triggering an alert of an alert device that the heating or cooling system is not capable of maintaining the absolute value of the proportional error below the proportional error threshold in response to determining that the proportional error will not be less than the proportional error threshold within the time limit. - View Dependent Claims (8, 9, 10, 11)
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12. A mechanism for monitoring comfort control in a space, comprising:
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a heating or cooling system having one or more heating or cooling vents and an alert device, respectively, connected to a space; and a thermostat connected to the heating or cooling system; and wherein; the thermostat comprises; a processor connected to the heating or cooling system; a temperature sensor for sensing space temperature connected to the processor; and a set point display, for indicating set point temperature, connected to the processor; and wherein, the processor is configured to; identify the set point for the heating or cooling system using the set point device; obtain a temperature of the space from the temperature sensor; identify a proportional error by determining a difference between the set point and the temperature of the space; determine that an absolute value of the proportional error is greater than a proportional error threshold; identify the heating or cooling system is not in a recovery state in response to determining that the absolute value of the proportional error is greater than the proportional error threshold, wherein identifying that the heating or cooling system is not in the recovery state is done by determining that a time since the device has been used to change the set point temperature is greater than a recovery time threshold; determine a rate of change of the absolute value of the proportional error in response to identifying that the heating or cooling system is not in the recovery state; determine the rate of change is less than a proportional error rate of change threshold in response to determining the rate of change; determine whether the absolute value of the proportional error will not be less than the proportional error threshold within a time limit in response to determining that the rate of change is less than the proportional error rate of change threshold; and trigger an alert of the alert device that the heating or cooling system is not capable of maintaining the absolute value of the proportional error below the proportional error threshold in response to determining that the proportional error will not be less than the proportional error threshold within the time limit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification