Proportional control system for a motor

Abstract

The present invention provides a proportional control system for use in an HVAC unit within a ventilation system comprising a processing means programmed with an air exchange-defrost cycle. One or more motor speed sensing means are also positioned in the HVAC unit and operatively connected to the processing means and one or more temperature sensing means are positioned in the HVAC unit and operatively connected to the processing means wherein the temperature and motor speed sensors determine the motor speed to be applied during the defrost cycle.

1 . A proportional control system for use in an HVAC unit within a ventilation system comprising: 
 a) a processing means programmed with an air exchange-defrost cycle;    b) one or more motor speed sensing means positioned in the HVAC unit and operatively connected to the processing means; and    c) one or more temperature sensing means positioned in the HVAC unit and operatively connected to the processing means    wherein the temperature and motor speed sensors determine the motor speed to be applied during the defrost cycle.    
   
   
       2 . The proportional control system of  claim 1  wherein a first temperature sensing means is positioned the fresh air inlet intake of the HVAC unit.  
   
   
       3 . The proportional control system of  claim 1  wherein a first speed sensing means is positioned on the fresh air intake impeller.  
   
   
       4 . The proportional control system of  claim 1  wherein a second sensing means is positioned in the stale air intake of the HVAC unit.  
   
   
       5 . The proportional control system of  claim 1  wherein a damper mechanism is installed in the air inlet intake of an HVAC unit.  
   
   
       6 . A proportional control system for use in an HVAC unit within a ventilation system comprising: 
 a) a processing means programmed with an air exchange-defrost cycle;    b) one or more sensing means positioned in the HVAC unit and operatively connected to the processing means; and    c) a damper mechanism positioned in the HVAC unit;    wherein the temperature sensing means determine the motor speed to be applied during the defrost cycle.    
   
   
       7 . The proportional control system of  claim 6  wherein a first temperature sensing means is positioned in the air inlet intake of the HVAC unit.  
   
   
       8 . The proportional control system of  claim 6  wherein a motor speed sensor is incorporated within the processing means.  
   
   
       9 . The proportional control system of  claim 6  wherein a damper mechanism is installed in the air inlet intake of an HVAC unit.