Heat exchanger

Abstract

The invention relates to a heat exchanger. This exchanger is of the type which has at least one route for flow of a cooling fluid, such as water, a cooling agent or even air, and at least a second route for flow of a fluid such as air. At least the second route has a number of flow channels. The exchanger is characterized by the fact that it has some means of evacuation of the water which condenses on the walls of the air flow channels by suction. The invention can be used in heat exchangers.

1 . A heat exchanger of the type which has at least one route for flow of a cooling fluid, such as water, a cooling agent or even air, and at least a second route for flow of a fluid such as air, at least the second route having a number of flow channels, characterized by the fact that it has some means of evacuation by suction of the water which condensed on the walls of the air flow channels.  
     
     
         2 . A heat exchanger according to  claim 1 , characterized by the fact that the means of evacuation have suction openings ( 17 ) which join with the channels for flow of the cooling fluid.  
     
     
         3 . A heat exchanger according to  claim 1 , characterized by the fact that the means of suction are provided at outlets ( 11 ) of gaseous fluid flow channels ( 8 ).  
     
     
         4 . A heat exchanger according to  claim 3 , characterized by the fact that the means of evacuation of the water have suction openings ( 17 ) provided at the site of outlets ( 11 ) of air flow channels ( 8 ).  
     
     
         5 . A heat exchanger according to  claim 4 , characterized by the fact that suction openings ( 17 ) join with space ( 15 ) in which a low pressure predominates.  
     
     
         6 . A heat exchanger according to one of  claims 1  to  5 , in which air flow channels ( 8 ) are juxtaposed and formed between two roughly parallel plates ( 5 ), characterized by the fact that these plates ( 5 ) extend at ( 14 ) beyond ends ( 11 ) of air flow channels ( 8 ) and by the fact that suction openings ( 17 ) are formed by through-holes which join with said low pressure space ( 15 ).  
     
     
         7 . A heat exchanger according to  claim 6 , characterized by the fact that the aforementioned space ( 15 ) is delimited in cooling water flow route ( 2 ) and by the fact that suction holes ( 17 ) emerge in this space ( 15 ).  
     
     
         8 . A heat exchanger according to either of claims  6  and  7 , characterized by the fact that ends ( 11 ) of walls ( 9 ) delimiting air flow channels ( 8 ) between two plates ( 5 ) have a shape which ensures routing of the condensate towards suction openings ( 17 ).  
     
     
         9 . A heat exchanger according to one of  claims 6  to  8 , characterized by the fact that ends ( 11 ) of delimiting walls ( 9 ) of flow channels ( 8 ) between two plates ( 5 ) have a curved shape so that the end is recessed in its median part.  
     
     
         10 . A heat exchanger according to one of  claims 6  to  8 , characterized by the fact that end ( 11 ) of delimiting wall ( 9 ) of the air flow channels between two plates ( 5 ) is configured so that the median part projects in the direction of the flow of the air with respect to the parts adjacent to plates ( 5 ) and by the fact that suction openings ( 17 ) are provided roughly under the projecting parts.  
     
     
         11 . A heat exchanger according to one of  claims 6  to  10 , characterized by the fact that suction holes ( 17 ) are formed by at least one series of holes ( 22 ) distributed over the width of projecting part ( 14 ) of plates ( 5 ).  
     
     
         12 . A heat exchanger according to one of  claims 6  to  10 , characterized by the fact that suction holes ( 17 ) are formed by at least one row of slits ( 23 ) aligned over the width of part ( 14 ) of plates ( 5 ).  
     
     
         13 . A heat exchanger according to  claim 12 , characterized by the fact that slit ( 23 ) has the shape of an S ( 24 ) and by the fact that the slits are aligned so that their ends overlap in height.  
     
     
         14 . A heat exchanger according to  claim 11 , characterized by the fact that it has at least two rows of holes ( 25 ,  26 ), of different shape if necessary, a hole of one row being in the middle of a hole two holes of another row.