Sensor calibration for heating, ventilation, and/or air conditioning system

Abstract

A method for sensor calibration in a heating, ventilation, and air-conditioning system (HVAC system) includes receiving data indicative of a detected calibration parameter of a working fluid of the HVAC system in an idle state and determining a saturation parameter of the working fluid with a controller of the HVAC system based on the detected calibration parameter and saturation parameter data. The method further includes receiving a first detected parameter from a sensor of the HVAC system, comparing the saturation parameter to the first detected parameter and determining a deviation between the saturation parameter and the first detected parameter. The method further includes receiving a second detected parameter of the working fluid from the sensor of the HVAC system with the HVAC system in an operating state and adjusting the second detected parameter using the deviation to determine an adjusted second detected parameter of the working fluid.

WHAT IS CLAIMED IS: 
     
         1 . A method for sensor calibration in a heating, ventilation, and air-conditioning system (HVAC) system, the method comprising: 
 receiving data indicative of a detected calibration parameter of a working fluid of the HVAC system with the HVAC system in an idle state;   determining a saturation parameter of the working fluid with a controller of the HVAC system based on the detected calibration parameter and saturation parameter data;    receiving a first detected parameter from a sensor of the HVAC system;   comparing the saturation parameter to the first detected parameter;   determining a deviation between the saturation parameter and the first detected parameter;   receiving a second detected parameter of the working fluid from the sensor of the HVAC system with the HVAC system in an operating state; and   adjusting the second detected parameter using the deviation to determine an adjusted second detected parameter of the working fluid.   
     
     
         2 . The method of  claim 1 , wherein the saturation parameter is a saturation temperature of the working fluid, the first detected parameter is a first detected temperature, the sensor is a temperature sensor, the second detected parameter is a second detected temperature of the working fluid, and the adjusted second detected parameter is an adjusted second detected temperature of the working fluid.  
     
     
         3 . The method of  claim 2 , wherein the detected calibration parameter is a detected calibration pressure of the working fluid, and wherein determining the saturation temperature comprises:  
       performing an algorithm based on the detected calibration pressure and a type of the working fluid to determine the saturation temperature. 
     
     
         4 . The method of  claim 2 , wherein the data indicative of the detected calibration parameter comprises a detected calibration pressure of the working fluid. 
     
     
         5 . The method of  claim 4 , wherein determining the saturation parameter comprises determining a saturation temperature based on a chart and the detected calibration pressure, wherein the chart is based on a type of working fluid and comprises a pressure temperature chart (PT chart). 
     
     
         6 . The method of  claim 1 , wherein the saturation parameter is a saturation pressure of the working fluid, the first detected parameter is a first detected pressure of the working fluid, the sensor is a pressure sensor, the second detected parameter is a second detected pressure of the working fluid, and the adjusted second detected parameter is an adjusted second detected pressure of the working fluid.  
     
     
         7 . The method of  claim 6 , wherein the detected calibration parameter comprises a detected calibration temperature of the working fluid, and wherein the method comprises performing an algorithm based on the detected calibration temperature and a type of the working fluid to determine the saturation pressure. 
     
     
         8 . The method of  claim 7 , wherein determining the saturation pressure comprises determining the saturation pressure based on a chart and the detected calibration temperature, wherein the chart is based a type of working fluid. 
     
     
         9 . The method of  claim 8 , wherein the chart is a PT chart. 
     
     
         10 . The method of  claim 1  comprising controlling one or more components of the HVAC system based on the adjusted second detected parameter.  
     
     
         11 . The method of  claim 1 , wherein the idle state is a suspended state of the HVAC system after a defined period of inactivity has passed.  
     
     
         12 . A heat pump for a heating, ventilation, and air conditioning (HVAC) system, comprising: 
 a working fluid circuit;    a first conduit of the working fluid circuit, wherein the first conduit extends between a first heat exchanger and a second heat exchanger of the working fluid circuit;    a compressor disposed along the working fluid circuit, wherein the compressor is configured to direct a working fluid along the working fluid circuit;    one or more sensors disposed along the working fluid circuit, wherein the one or more sensors are configured to detected one or more parameters of the working fluid; and   a controller communicatively coupled to the one or more sensors, wherein the controller is configured to: 
 determine a saturation parameter of a working fluid of the HVAC system based on a calibration parameter detected during an idle state of the heat pump;  
 receive a first detected parameter from a sensor of the one or more sensors; 
 compare the saturation parameter to the first detected parameter; 
 determine a deviation between the saturation parameter and the first detected parameter; 
 receive a second detected parameter of the working fluid in an operating sate of the heat pump from the sensor; and 
 adjust the second detected parameter using the deviation to determine an adjusted second detected parameter of the working fluid. 
   
     
     
         13 . The heat pump of  claim 12 , wherein the saturation parameter is a saturation temperature of the working fluid, the first detected parameter is a first detected temperature of the working fluid, the sensor is a temperature sensor, the second detected parameter is a second detected temperature of the working fluid, and the adjusted second detected parameter is an adjusted second detected temperature of the working fluid.  
     
     
         14 . The heat pump of  claim 13 , wherein the controller is configured to: 
 receive a detected calibration pressure of the working fluid in the idle state of the heat pump from a second sensor of the one or more sensors as the calibration parameter; and    perform an algorithm based on the detected calibration pressure and a type of the working fluid to determine the saturation temperature.   
     
     
         15 . The heat pump of  claim 13 , wherein the controller is configured to: 
 receive a detected calibration pressure of the working fluid in the idle state of the heat pump from a second sensor of the one or more sensors as the calibration parameter; and   determine the saturation temperature based on a chart and the detected calibration pressure, wherein the chart is based on a type of working fluid.   
     
     
         16 . The heat pump of  claim 12 , wherein the saturation parameter is a saturation pressure of the working fluid, the first detected parameter is a first detected pressure of the working fluid, the sensor is a pressure sensor, the second detected parameter is a second detected pressure of the working fluid, and the adjusted second detected parameter is an adjusted second detected pressure of the working fluid. 
     
     
         17 . The heat pump of  claim 16 , wherein the controller is configured to: 
 receive a detected calibration temperature of the working fluid in the idle state of the heat pump from a second sensor of the one or more sensors as the calibration parameter; and    perform an algorithm based on the detected calibration temperature and a type of the working fluid to determine the saturation pressure.   
     
     
         18 . The heat pump of  claim 16 , wherein the controller is configured to: 
 receive a detected calibration temperature of the working fluid in the idle state of the heat pump from a second sensor of the one or more sensors as the calibration parameter; and   determine the saturation pressure based on a chart and the detected calibration temperature, wherein the chart is based on a type of working fluid.   
     
     
         19 . A method for sensor calibration, the method comprising: 
 receiving, in an idle state of a heat pump, a first detected parameter of a working fluid of the heat pump from a first sensor;   determining a saturation parameter of a working fluid of the heat pump based on the first detected parameter and a type of the working fluid;   receiving, in the idle state of the heat pump, a second detected parameter from a second sensor of the heat pump;   comparing the saturation parameter to the second detected parameter;   determining a deviation between the saturation parameter and the second detected parameter;   receiving, in an operating state of the heat pump, a third detected parameter of the working fluid from the second sensor of the heat pump; and   adjusting the third detected parameter using the deviation to determine an adjusted third detected parameter of the working fluid.   
     
     
         20 . The method of  claim 19 , wherein the first detected parameter is a detected calibration pressure of the working fluid, the second detected parameter is a first detected temperature of the working fluid, the third detected parameter is a second detected temperature of the working fluid, and the adjusted third detected parameter is an adjusted second detected temperature of the working fluid.