Exhaust structure from dryer in apartment building

Abstract

The present invention relates to an exhaust structure from dryers in an apartment building including at least one riser tube running vertically crossing stories of the apartment building, a plurality of branch tubes branched from the riser tube to apartments on each of the stories for guiding exhaust gas from the apartments to the riser tube, and a fan mounted to a top of the riser tube and to be driven for making a pressure distribution in the riser tube to be the same with a pressure distribution on an outside of the building, substantially.

1 . An exhaust structure from dryers in an apartment building comprising:
 at least one riser tube running vertically crossing stories of the apartment building;   a plurality of branch tubes branched from the riser tube to apartments on each of the stories for guiding exhaust gas from the apartments to the riser tube; and   a fan mounted to a top of the riser tube and to be driven for making a pressure distribution in the riser tube to be the same with a pressure distribution on an outside of the building, substantially.   
   
   
       2 . The exhaust structure of  claim 1 , further comprising:
 a motor for providing driving force to the fan;   a first pressure sensor for sensing a pressure of an inside of the riser tube; and   a motor controller for driving the fan with reference to a pressure sensed at the first pressure sensor such that the pressure distribution in the riser tube is the same with the pressure distribution on the outside of the building, substantially.   
   
   
       3 . The exhaust structure of  claim 2 , wherein the motor controller detects a flow rate of the exhaust gas in the riser tube with reference to the pressure sensed at the first pressure sensor for controlling operation of the motor. 
   
   
       4 . The exhaust structure of  claim 1 , wherein each of the plurality of branch tubes has at least one of a backflow preventive damper for preventing the exhaust gas from flowing backward, and a fire damper mounted thereto. 
   
   
       5 . The exhaust structure of  claim 4 , wherein each of the plurality of branch tubes has a carbon monoxide filter mounted thereto for filtering carbon monoxide. 
   
   
       6 . The exhaust structure of  claim 1 , further comprising a drain structure provided to an underside of the riser tube for draining condensed water from the exhaust gas. 
   
   
       7 . The exhaust structure of  claim 6 , further comprising an outdoor air tube provided to an underside of the riser tube, the outdoor air tube being in communication with an outside of the building. 
   
   
       8 . The exhaust structure of  claim 1 , wherein each of the plurality of branch tubes is connected to the riser tube with a downward slope. 
   
   
       9 . The exhaust structure of  claim 1 , wherein at least one of the plurality of branch tubes is a dryer branch tube for guiding the exhaust gas from the laundry dryer in each of the apartments to the riser tube. 
   
   
       10 . The exhaust structure of  claim 9 , wherein at least one of the plurality of branch tubes is a kitchen branch tube or bathroom branch tubes connected to a dryer branch tube. 
   
   
       11 . The exhaust structure of  claim 10 , wherein the dryer branch tube has a constant flow rate damper mounted thereto.