Ventilation device and method for its operation

Abstract

An inlet chamber ( 7 ) having an air supply inlet ( 8 ) and an outlet chamber ( 10 ) having an air supply outlet ( 11 ) are connected by pipes ( 13 ) which run in the longitudinal direction through a cavity ( 12 ) which is connected to a waste air inlet ( 16 ) via a supply line section ( 19 ) running counter to it and has a waste air outlet ( 17 ) with a fan ( 18 ) at the end adjacent to the inlet chamber ( 7 ). The cavity ( 12 ) together with the pipes ( 13 ) forms a countercurrent heat exchanger for transferring heat between the waste air and the air supply. Between the waste air inlet ( 16 ) and a passage ( 15 ) connecting the supply line section ( 19 ) to the cavity ( 12 ) at that end of said supply line section which is adjacent to the outlet chamber ( 10 ), a partition ( 14 ) separating the supply line section ( 19 ) from the cavity ( 12 ) there has a plurality of openings ( 20 a, 20 b, 20 c ) which are staggered in the direction of flow and in each case produce, for a part of the waste air stream, short-circuit connections bridging a part of the cavity ( 12 ).

1 . Ventilation device comprising a first channel which connects a first inlet to a first outlet and a second channel which connects a second inlet to a second outlet, a first exchange section which forms a section of the first channel and a second exchange section which forms a section of the second channel forming a heat exchanger in that they are led diametrically oppositely and have a heat-conducting connection, characterized in that the first inlet is connected to at least one entry point located downstream of the beginning of the first exchange section, via a short-circuit connection which bridges that part of the first exchange section which is located between the beginning and the entry point.  
   
   
       2 . Ventilation device according to  claim 1 , characterized in that the first channel has a supply line section ( 19 ) which connects the first inlet to the beginning of the first exchange section and of which the at least one short-circuit connection branches off at a branching point located downstream of the first inlet.  
   
   
       3 . Ventilation device according to  claim 2 , characterized in that it has a plurality of short-circuit connections, the entry points of which are staggered in sequence downstream in the first exchange section while their branching points are staggered in sequence upstream in the supply line section ( 19 ).  
   
   
       4 . Ventilation device according to  claim 2  or  3 , characterized in that at least a part of the supply line section ( 19 ) is arranged adjacent to the first exchange section and running counter to the same.  
   
   
       5 . Ventilation device according to  claim 4 , characterized in that the short-circuit connection is formed in each case as an opening through a partition ( 14 ) separating the supply line section ( 19 ) from the first exchange section.  
   
   
       6 . Ventilation device according to  claim 5 , characterized in that the opening is in each case in the form of a slot ( 20   a ,  20   b ,  20   c ).  
   
   
       7 . Ventilation device according to  claim 4  or  5 , characterized in that the supply line section ( 19 ) widens directly at the opening.  
   
   
       8 . Ventilation device according to any of  claims 2  to  7 , characterized in that the supply line section ( 19 ) has a plurality of constrictions.  
   
   
       9 . Ventilation device according to any of  claims 2  to  8 , characterized in that at least one part of the supply line section ( 19 ) which may be upstream of the first branching point is thermally insulated from the heat exchanger.  
   
   
       10 . Ventilation device according to any of  claims 1  to  9 , characterized in that the heat exchanger is in the form of an elongated cavity ( 12 ) having a plurality of pipes ( 13 ) which pass through said cavity in the longitudinal direction and whose interior forms the second exchange section, while the remaining part of the cavity ( 12 ) forms the first exchange section.  
   
   
       11 . Ventilation device according to  claim 10 , characterized in that the pipes ( 13 ) are parallel.  
   
   
       12 . Ventilation device according to  claim 10  or  11 , characterized in that the pipes ( 13 ) are connected to the second inlet via an inlet chamber ( 7 ) separated by a first intermediate wall ( 5 ) through which the pipes ( 13 ) are led.  
   
   
       13 . Ventilation device according to  claim 12 , characterized in that the inlet chamber ( 7 ) has turbulence-generating baffles.  
   
   
       14 . Ventilation device according to  claim 12  or  13 , characterized in that the inlet chamber ( 7 ) is thermally insulated from the cavity ( 12 ).  
   
   
       15 . Ventilation device according to any of  claims 10  to  14 , characterized in that the pipes ( 13 ) are connected to the second outlet via an outlet chamber ( 10 ) separated from the cavity ( 12 ) by a second intermediate wall ( 6 ) through which the pipes ( 13 ) are led.  
   
   
       16 . Ventilation device according to any of  claims 12  to  15 , characterized in that the first inlet and the first outlet are arranged directly at the first intermediate wall ( 5 ).  
   
   
       17 . Ventilation device according to any of  claims 1  to  16 , characterized in that a fan ( 18 ) is arranged in the region of the first outlet.  
   
   
       18 . Method for operating the ventilation device according to any of  claims 1  to  17  for ventilating a heated or cooled room, characterized in that the first channel is used as a waste air channel, with the first inlet as waste air inlet ( 16 ) arranged in the room and the first outlet as waste air outlet ( 17 ) arranged outside the room, and the second channel as air supply channel, with the second inlet as air supply inlet ( 8 ) arranged outside the room and the second outlet as air supply outlet ( 11 ) arranged in the room.