Method of and system for detecting loss of refrigerant charge
First Claim
1. A method of determining loss of refrigerant charge in a heating, ventilation, and air conditioning (HVAC) system, the method comprising:
- receiving, by a controller operatively coupled to a plurality of temperature sensors, a plurality of temperature values from the plurality of temperature sensors placed at multiple locations within the HVAC system, wherein the plurality of temperature sensors communicate with the controller via at least one of a wired connection and a wireless connection;
calculating, using the controller using the plurality of temperature values, a plurality of temperature-dependent values;
determining, using the controller, whether a first temperature-dependent value of the plurality of temperature-dependent values is above a first predetermined temperature value, wherein the first temperature-dependent value comprises a discharge-superheat temperature of a refrigerant (DSH),wherein DSH is calculated using the equation listed below;
DSH=(TdisC−
Tmod)*(82/Tod); and
wherein TdisC refers to a compressor-discharge temperature, Tmod refers to an outdoor mid-circuit-condenser temperature, and Tod refers to outdoor ambient temperature; and
responsive to a determination that the first temperature-dependent value is above the first predetermined temperature value, transmitting, using the controller to a user interface, a notification indicating that the HVAC system is operating with low refrigerant charge.
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Abstract
A method of determining loss of refrigerant charge in a heating, ventilation, and air conditioning (HVAC) system. The method includes receiving, using a controller, a plurality of temperature values from a plurality of temperature sensors placed at multiple locations within the HVAC system and calculating, using the controller using the plurality of temperature values, a plurality of temperature-dependent values. The method further includes determining, using the controller, whether a first temperature-dependent value of the plurality of temperature-dependent values is above a first predetermined temperature value and responsive to a determination that the first temperature-dependent value is above the first predetermined temperature value, transmitting, using the controller to a user interface, a notification indicating that the HVAC system is operating with low refrigerant charge.
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Citations
14 Claims
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1. A method of determining loss of refrigerant charge in a heating, ventilation, and air conditioning (HVAC) system, the method comprising:
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receiving, by a controller operatively coupled to a plurality of temperature sensors, a plurality of temperature values from the plurality of temperature sensors placed at multiple locations within the HVAC system, wherein the plurality of temperature sensors communicate with the controller via at least one of a wired connection and a wireless connection; calculating, using the controller using the plurality of temperature values, a plurality of temperature-dependent values; determining, using the controller, whether a first temperature-dependent value of the plurality of temperature-dependent values is above a first predetermined temperature value, wherein the first temperature-dependent value comprises a discharge-superheat temperature of a refrigerant (DSH), wherein DSH is calculated using the equation listed below;
DSH=(TdisC−
Tmod)*(82/Tod); andwherein TdisC refers to a compressor-discharge temperature, Tmod refers to an outdoor mid-circuit-condenser temperature, and Tod refers to outdoor ambient temperature; and responsive to a determination that the first temperature-dependent value is above the first predetermined temperature value, transmitting, using the controller to a user interface, a notification indicating that the HVAC system is operating with low refrigerant charge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification