Fluid/Fluid Heat Exchanger

Abstract

A heat exchanger transfers heat between a first fluid and a second fluid. The heat exchanger comprises a stack of plates comprising a last plate and a penultimate plate jointly delimiting an end chamber. The last plate is provided with at least one inlet for the second fluid and one outlet for the second fluid. The stack of plates defines an inlet passage for the second fluid and an outlet passage for the second fluid. The end chamber houses a channeling means comprising an inlet circulation canal for channeling the second fluid between the inlet for the second fluid and the inlet passage for the second fluid, and an outlet circulation canal for channeling the second fluid between the outlet for the second fluid and the outlet passage for the second fluid.

1 . A heat exchanger ( 100 ) for transferring heat between a first fluid and a second fluid, the heat exchanger ( 100 ) comprising a stack of plates ( 124 ) comprising a last plate ( 124 ) and a penultimate plate ( 124 ) jointly delimiting an end chamber ( 126 c), the last plate ( 124 ) having at least one inlet for the second fluid ( 121 ) and one outlet for the second fluid ( 122 ), and the stack of plates ( 124 ) defining an inlet passage for the second fluid ( 130 ) and an outlet passage for the second fluid ( 131 ),
 wherein the end chamber ( 126   c ) houses a channeling means ( 127 ) comprising an inlet circulation canal ( 128   a ) for channeling the second fluid between the inlet for the second fluid ( 121 ) and the inlet passage for the second fluid ( 130 ), and an outlet circulation canal ( 128   b ) for channeling the second fluid between the outlet for the second fluid ( 122 ) and the outlet passage for the second fluid ( 131 ).   
     
     
         2 . The heat exchanger ( 100 ) as claimed in  claim 1 , wherein the channeling means ( 127 ) consists of at least one boss formed on the last plate ( 124 ) and/or the penultimate plate ( 124 ) of the stack of plates ( 124 ). 
     
     
         3 . The heat exchanger ( 100 ) as claimed in  claim 1 , wherein the channeling means ( 127 ) consists of an insert ( 127 ) housed in the end chamber ( 126   c ). 
     
     
         4 . The heat exchanger ( 100 ) as claimed in  claim 3 , wherein the insert ( 127 ) is formed of at least one blade ( 132 ,  133 ). 
     
     
         5 . The heat exchanger ( 100 ) as claimed in  claim 4 , wherein the blade ( 132 ,  133 ) comprises a base wall ( 132   a,    133   a ) and a contour ( 132   b,    133   b ) which are connected to one another by a lateral wall ( 132   c ,  133   c ). 
     
     
         6 . The heat exchanger ( 100 ) as claimed in  claim 5 , wherein the base wall ( 132   a ) is in contact with the penultimate plate ( 124 ) of the stack of plates ( 124 ) and wherein the contour ( 132   b ) is in contact with the last plate ( 124 ) of the stack of plates ( 124 ). 
     
     
         7 . The heat exchanger ( 100 ) as claimed in  claim 6 , wherein the inlet circulation canal ( 128   a ) and the outlet circulation canal ( 128   b ) for the second fluid are delimited by the insert ( 127 ) and the last plate ( 124 ). 
     
     
         8 . The heat exchanger ( 100 ) as claimed in  claim 5 , wherein the insert ( 127 ) is formed by two blades ( 133 ) joined together, the base wall ( 133   a ) of one of the blades ( 133 ) is in contact with the penultimate plate ( 124 ) of the stack of plates ( 124 ), the base wall ( 133   a ) of the other of the blades ( 133 ) is in contact with the last plate ( 124 ) of the stack of plates ( 124 ), and the respective contours ( 133   b ) of the blades ( 133 ) are in contact with one another. 
     
     
         9 . The heat exchanger ( 100 ) as claimed in  claim 3 , wherein the insert ( 127 ) is made up of two separate distribution compartments ( 135   a,    135   b ). 
     
     
         10 . The heat exchanger ( 100 ) as claimed in  claim 9 , wherein the two distribution compartments ( 135   a,    135   b ) are identical. 
     
     
         11 . The heat exchanger ( 100 ) as claimed in  claim 3 , wherein the insert ( 127 ) consists of a distribution device ( 136 ) comprising two distribution chambers ( 136   a,    136   b ). 
     
     
         12 . The heat exchanger ( 100 ) as claimed in  claim 11 , wherein the two distribution chambers ( 136   a,    136   b ) are arranged with local symmetry with respect to one another. 
     
     
         13 . The heat exchanger ( 100 ) as claimed in  claim 1 , wherein the inlet circulation canal ( 128   a ) and the outlet circulation canal ( 128   b ) for the second fluid are orthogonal to the inlet passage for the second fluid ( 130 ) and to the outlet passage for the second fluid ( 131 ). 
     
     
         14 . The heat exchanger ( 100 ) as claimed in  claim 1 , wherein the inlet for the second fluid ( 121 ) and the outlet for the second fluid ( 122 ) are arranged in a central zone ( 129 ) of the last plate ( 124 ) of the stack of plates ( 124 ). 
     
     
         15 . An air-conditioning loop ( 2 ) and/or secondary loop ( 18 ) comprising a heat exchanger ( 100 ) as claimed in  claim 1 . 
     
     
         16 . The air-conditioning loop ( 2 ) and/or secondary loop ( 18 ) as claimed in  claim 15 , wherein the air-conditioning loop ( 2 ) and/or the secondary loop ( 18 ) comprises a connecting element ( 140 ) comprising an intake opening ( 141 ) and a discharge opening ( 142 ) for the second fluid and a major axis (A) passing through the centers of the intake opening ( 141 ) and of the discharge opening ( 142 ), and wherein the major axis (A) forms an angle of between 0° and 90° with a first median axis of the last plate ( 124 ) of the stack of plates ( 124 ). 
     
     
         17 . The heat exchanger ( 100 ) as claimed in  claim 7 , wherein the insert ( 127 ) is made up of two separate distribution compartments ( 135   a,    135   b ). 
     
     
         18 . The heat exchanger ( 100 ) as claimed in  claim 17 , wherein the two distribution compartments ( 135   a,    135   b ) are identical. 
     
     
         19 . The heat exchanger ( 100 ) as claimed in  claim 7 , wherein the insert ( 127 ) consists of a distribution device ( 136 ) comprising two distribution chambers ( 136   a ,  136   b ). 
     
     
         20 . The heat exchanger ( 100 ) as claimed in  claim 19 , wherein the two distribution chambers ( 136   a,    136   b ) are arranged with local symmetry with respect to one another.