Hvac adjustment module

Abstract

A heating, ventilation and air conditioning (HVAC) system is provided. The system includes an integrated motor including a plurality of operating speeds and an input for selecting one of the plurality of operating speeds. The system further includes a system controller and an adjustment module. The adjustment module includes a plurality of operating modes each associated with one of the plurality of operating speeds and the ability to manually vary associations between the plurality of operating modes and the plurality of operating speeds. The adjustment module selects one of the plurality of operating modes on the basis of control commands received from the system controller and setting programmed or manually entered into and stored in the adjustment module and controls the integrated motor according to the operating speed associated with the selected operating mode.

1 . A method for computing and reporting cubic feet per minute (CFM) of airflow of a motor operating at an operating speed and operating torque, said method comprising:
 modeling CFM of the motor as a function of motor torque to create a CFM model;   calculating a ratio of the operating speed to a base speed of the motor;   calculating a base torque of the motor at the base speed from the ratio and the operating torque;   calculating a base CFM of the motor from the base torque and the CFM model; and,   calculating an operating CFM of the motor at the operating speed using the base CFM and the ratio.   
     
     
         2 . The method according to  claim 1 , wherein the CFM is represented as a polynomial. 
     
     
         3 . The method according to  claim 1 , wherein the modeling includes:
 receiving a plurality of data points, each data point including a torque of the motor and a corresponding CFM of the motor; and,   fitting a polynomial trend line to the plurality of measured data points.   
     
     
         4 . The method according to  claim 3 , wherein the plurality of measured data points are empirically determined through testing. 
     
     
         5 . The method according to  claim 1 , wherein the base torque is determined using the following equation:
     T   b   =T   x /( R ) 2 ,   
       where T b  is the base torque, T x  is the operating torque and R is the ratio. 
     
     
         6 . The method according to  claim 1 , wherein the operating CFM is the product of the base CFM and the ratio. 
     
     
         7 . A variable speed blower motor unit controlled by a heating, ventilation and air conditioning (HVAC) system controller, said variable speed blower comprising:
 an integrated motor including a plurality of operating speeds or torques and an input for selecting one of the plurality of operating speeds or torques; and,   an adjustment module coupled to the integrated motor and the HVAC system controller, wherein said adjustment module includes a plurality of operating modes each associated with one of the plurality of operating speeds or torques;   wherein said adjustment module selects one of the plurality of operating modes on the basis of control commands received from the HVAC system controller and controls the integrated motor according to the operating speed associated with the selected operating mode;   wherein the adjustment module includes the ability to manually vary associations between the plurality of operating modes and the plurality of operating speeds or torques;   wherein the adjustment module displays operating CFM of the integrated motor as determined using the method according to  claim 1 .   
     
     
         8 . A method for compute and reporting static pressure (SP) of a motor operating at an operating speed and operating torque, said method comprising:
 modeling SP of the motor as a function of motor torque to create a SP model;   calculating a ratio of the operating speed to a base speed of the motor;   calculating a base torque of the motor at the base speed from the ratio and the operating torque;   calculating a base SP of the motor from the base torque and the SP model; and,   calculating an operating SP of the motor at the operating speed using the base SP and the ratio.   
     
     
         9 . The method according to  claim 8 , wherein the SP is represented as a polynomial. 
     
     
         10 . The method according to  claim 8 , wherein the modeling includes:
 receiving a plurality of data points, each data point including a torque of the motor and a corresponding SP of the motor; and,   fitting a polynomial trend line to the plurality of measured data points.   
     
     
         11 . The method according to  claim 10 , wherein the plurality of measured data points are empirically determined through testing. 
     
     
         12 . The method according to  claim 8 , wherein the base torque is determined using the following equation:
     T   b   =T   x /( R ) 2 ,   
       where T b  is the base torque, T x  is the operating torque and R is the ratio. 
     
     
         13 . The method according to  claim 8 , wherein the operating SP is the product of the base SP, and the ratio squared. 
     
     
         14 . A variable speed blower motor unit controlled by a heating, ventilation and air conditioning (HVAC) system controller, said variable speed blower comprising:
 an integrated motor including a plurality of operating speeds or torques and an input for selecting one of the plurality of operating speeds or torques; and,   an adjustment module coupled to the integrated motor and the HVAC system controller, wherein said adjustment module includes a plurality of operating modes each associated with one of the plurality of operating speeds or torques;   wherein said adjustment module selects one of the plurality of operating modes on the basis of control commands received from the HVAC system controller and controls the integrated motor according to the operating speed associated with the selected operating mode;   wherein the adjustment module includes the ability to manually vary associations between the plurality of operating modes and the plurality of operating speeds or torques;   wherein the adjustment module displays operating SP of the integrated motor as determined using the method according to  claim 8 .