Evaporator coil bypass device for HVAC System

Abstract

A bypass device to seasonally bypass an evaporator coil in a building's HVAC system to improve efficiency and reduce dust accumulation. The bypass device comprises one or more bypass diverters around an evaporator coil in an HVAC system, wherein bypass doors may be manipulated so as to close the air path through the evaporator coil and force air to flow through bypass diverters instead. The bypass doors are adjustable using control arms and may be maintained in either a flow-through or bypass position, so as to permit the air flow to travel through the evaporator coil, or bypass the coil, as the operator chooses. The control arms may alternatively be manipulated by a motor and connected to the thermostat so as to automatically select the appropriate position depending on the settings of the thermostat.

1 . A bypass device, positioned within a ventilation system having a evaporating coil comprises:
 one or more bypass diverters;   one or more adjustable doors;   wherein said doors may be adjusted to divert airflow through the one or more bypass diverters, substantially preventing air flow through the evaporating coil.   
   
   
       2 . The bypass device according to  claim 1  further comprising one or more manual control arms operatively connected to the one or more adjustable doors 
   
   
       3 . The bypass device according to  claim 1  further comprising one or more servo motors operatively connected to the one or more adjustable doors. 
   
   
       4 . The bypass device according to  claim 1  wherein the one or more adjustable doors comprises:
 a first upper door and a second upper door; and   a first lower door and a second lower door.   
   
   
       5 . The bypass device according to  claim 4  wherein the first and second lower door have heat resistant rubber lips. 
   
   
       6 . The bypass device according to  claim 4  wherein the first lower door is shorter than the second lower door. 
   
   
       7 . The bypass device according to  claim 4  wherein the first and second upper door are gravity operated and the first and second lower doors are manually operated. 
   
   
       8 . The bypass device according to  claim 4  wherein the first and second upper doors are gravity operated and the first and second lower doors are operated by one or more servo motors operatively connected to a furnace. 
   
   
       9 . The bypass device according to  claim 4  wherein the first and second upper doors are gravity operated and the first and second lower doors are operated by servo motors operatively connected to a building's thermostat. 
   
   
       10 . The bypass device according to  claim 4  wherein the bypass diverters have semi-trapezoidal shapes. 
   
   
       11 . The bypass device according to  claim 4  further comprising a first manual control arm operatively connected to the first lower door and a second manual control arm lever operatively connected to the second lower door. 
   
   
       12 . The bypass device according to  claim 4  further comprising a first servo motor operatively connected to the first lower door and a second servo motor operatively connected to the second lower door.