Electronic enclosure including a flame arrestor having a mechanical check valve

Abstract

An electronic enclosure includes a housing having a plurality of walls that define an interior portion. A flame arrestor is mounted to one of the plurality of walls of the housing. The flame arrestor includes a mechanical check valve. The mechanical check valve is configured and disposed to allow a fluid to exit the interior portion of the housing and prevent fluid from entering the interior portion of the housing.

What is claimed is: 
     
         1 . An electronic enclosure comprising:
 a housing including a plurality of walls that define an interior portion; and   a flame arrestor mounted at one of the plurality of walls of the housing, the flame arrestor including a mechanical check valve, the mechanical check valve being configured and disposed to allow a fluid to exit the interior portion of the housing and prevent fluid from entering the interior portion of the housing.   
     
     
         2 . The electronic enclosure of  claim 1 , wherein the mechanical check valve includes a valve member that is moveable between a first position that fluidly isolates the interior portion of the housing and a second position that fluidly opens the interior portion of the housing. 
     
     
         3 . The electronic enclosure of  claim 1 , wherein the mechanical check valve comprises a duckbill valve. 
     
     
         4 . The electronic enclosure of  claim 3 , wherein the duckbill valve includes a resilient valve member. 
     
     
         5 . The electronic enclosure of  claim 1 , wherein the mechanical check valve comprises a spring valve. 
     
     
         6 . The electronic enclosure according to  claim 1 , wherein the flame arrestor includes a blocking tube including a first end exposed in the interior portion of the housing and a second end positioned outside the housing, the second end including an angled surface. 
     
     
         7 . The electronic enclosure according to  claim 6 , wherein the mechanical check valve is positioned within the blocking tube. 
     
     
         8 . The electronic enclosure of  claim 6 , further comprising: another housing having an interior zone, the interior portion of the housing being connected to the interior zone of the another housing through the blocking tube. 
     
     
         9 . The electronic enclosure of  claim 8 , further comprising: a motor drive control arranged within the interior portion of the housing. 
     
     
         10 . The electronic enclosure of  claim 9 , further comprising: a fan motor arranged within the interior zone of the another housing. 
     
     
         11 . A motor drive system comprising:
 a fan housing unit including a motor housing unit having an interior zone; and   a motor drive unit connected to the fan housing unit, the motor drive unit including a housing having an interior portion, the housing including a flame arrestor having a mechanical check valve moveable between a first position that fluidly isolates the interior portion and a second position that allows passage of fluid from the interior portion.   
     
     
         12 . The motor drive system of  claim 11 , wherein the mechanical check valve includes a valve member that is moveable between the first position and the second position. 
     
     
         13 . The motor drive system of  claim 11 , wherein the mechanical check valve comprises a duckbill valve. 
     
     
         14 . The motor drive system of  claim 13 , wherein the duckbill valve includes a resilient valve member. 
     
     
         15 . The motor drive system of  claim 11 , wherein the mechanical check valve comprises a spring valve. 
     
     
         16 . The motor drive system of  claim 11 , wherein the fan housing unit comprises an electric motor arranged within the motor housing unit. 
     
     
         17 . The motor drive system of  claim 11 , further comprising: a motor drive control arranged within the interior portion of the motor drive unit. 
     
     
         18 . The motor drive system of  claim 11 , wherein the flame arrestor includes a blocking tube having a first end that is exposed in the interior portion and a second end exposed in the interior zone, the second end including an angled surface. 
     
     
         19 . The motor drive system of  claim 18 , wherein the mechanical check valve is positioned within the blocking tube. 
     
     
         20 . The motor drive system of  claim 19 , wherein the mechanical check valve includes a flange section that locates the mechanical check valve within the blocking tube.