Evaporator, in Particular for an Air-Conditioning System of a Motor Vehicle

Abstract

The invention relates to an evaporator ( 1 ), in particular for an air-conditioning system of a motor vehicle, comprising flow channels for a coolant and ribs which can be impinged upon by air and which are arranged on the outside of the flow channels. According to the invention, at least one cooling element ( 5 ) which can be cross-flown by a coolant ( 5 ) is connected in a thermally conductive manner to the evaporator ( 1 ) and is connected to a secondary circuit ( 6 ) which acts as a cooler for the consumers, in particular electronic components ( 8 ).

1 . An evaporator, especially for an air-conditioning system of a motor vehicle with flow channels for a refrigerant and with fins, arranged outside of the flow channels and that can be impinged upon by air, characterized in that at least one cooling element ( 5 ,  11 ,  21 ,  210 ,  510 ,  520 ,  710 ) that can carry a coolant flow is connected in a heat conductive way to the evaporator ( 1 ,  10 ,  20 ,  270 ,  570 ,  770 ). 
     
     
         2 . The evaporator according to  claim 1 , characterized in that the evaporator is constructed as a flat tube evaporator ( 10 ,  20 ,  30 ,  270 ,  570 ,  770 ) with flat tubes ( 10   a ,  31 ,  81 ,  220 ,  230 ) and corrugated fins ( 10   b ,  82 ). 
     
     
         3 . The evaporator according to  claim 1 , characterized in that the evaporator is constructed as a plate or tray evaporator. 
     
     
         4 . The evaporator according to  claim 1 , characterized in that the refrigerant is R134a or R152. 
     
     
         5 . The evaporator according to  claim 1 , characterized in that the refrigerant is R744 (carbon dioxide). 
     
     
         6 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 5 ,  11 ,  21 ,  22 ,  35 ,  80 ) are arranged between two adjacent flat tubes ( 10   a ,  81 ) or trays or plates. 
     
     
         7 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 5 ,  11 ,  21 ,  22 ,  35 ,  80 ,  210 ,  510 ,  520 ,  710 ,  910 ) are connected to at least one flow channel ( 10   a ,  31 ,  81 ,  220 ) with a material fit, especially through soldering, welding, adhesion, etc., or especially with a positive fit through clips, screws, etc. 
     
     
         8 . The evaporator according to  claim 1 , characterized in that the cooling element ( 5 ,  11 ,  21 ,  22 ,  35 ,  60 ,  70 ,  80 ) is connected on the coolant side to a separate cooling circuit (secondary circuit  6 ). 
     
     
         9 . The evaporator according to  claim 8 , characterized in that the secondary circuit ( 6 ) is used for cooling loads generating heat, especially electronic components. 
     
     
         10 . The evaporator according to  claim 1 , characterized in that the coolant in the secondary circuit ( 6 ) is a mixture of water and Glysantin. 
     
     
         11 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 5 ,  11 ,  21 ,  22 ,  35 ,  60 ,  70 ,  80 ,  210 ,  510 ,  520 ,  710 ,  910 ) are constructed as rectangular tubes ( 61 ,  71 ) and are arranged between adjacent flow channels ( 81 ). 
     
     
         12 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 80 ) contact the flow channels ( 81 ) with both broad sides. 
     
     
         13 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 80 ) are arranged between a flow channel ( 81 ) and a corrugated fin ( 82 ). 
     
     
         14 . Evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 80 ) are arranged between two adjacent corrugated fins ( 82 ). 
     
     
         15 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 70 ) can carry a single flow of coolant. 
     
     
         16 . The evaporator according to  claim 1 , characterized in that the cooling element ( 69 ) can carry a double flow (with reversal U). 
     
     
         17 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 60 ,  70 ) have an inlet and an outlet port ( 60   a ,  60   b ,  70   a ,  70   b ) for the coolant. 
     
     
         18 . The evaporator according to  claim 1 , characterized in that turbulence inserts ( 64 ,  72 ) are arranged in the interior of the cooling element ( 60 ,  70 ). 
     
     
         19 . The evaporator according to  claim 1 , characterized in that the one or more cooling elements ( 210 ,  410 ,  520 ,  710 ,  910 ) are connected to at least one outer flat tube ( 220 ) with a material fit, especially through soldering, welding, adhesion, etc., and/or especially with a positive fit through clips, screws, etc. 
     
     
         20 . The evaporator according to  claim 1 , characterized in that at least one first cooling element ( 510 ) and at least one second cooling element ( 520 ) can carry a flow in series. 
     
     
         21 . The evaporator according to  claim 1 , characterized in that at least one first cooling element ( 710 ) and at least one second cooling element ( 710 ) can carry a flow in parallel. 
     
     
         22 . The evaporator according to  claim 1 , characterized in that at least one cooling element ( 210 ,  510 ,  520 ,  710 ,  910 ) replaces at least one side part of the evaporator ( 270 ,  570 ,  770 ) and in particular delimits the tube block ( 370 ). 
     
     
         23 . The evaporator according to  claim 1 , characterized in that a width ( 390 ) of the one or more cooling elements ( 210 ,  510 ,  520 ,  710 ,  910 ) is independent of at least one modular dimension of at least one tube, especially a flat tube, and/or at least one fin, especially a corrugated fin. 
     
     
         24 . The evaporator according to  claim 1 , characterized in that a width ( 390 ) of the one or more cooling elements ( 210 ,  510 ,  520 ,  710 ,  910 ) is dependent on at least one modular dimension of at least one tube, especially a flat tube, and/or at least one fin, especially a corrugated fin. 
     
     
         25 . A cooling device for cooling loads generating heat, especially in a motor vehicle, characterized by the heat-conductive connection of at least one cooling element that can carry a coolant flow to an evaporator, especially of a motor vehicle air-conditioning system, and the connection of a secondary circuit that can carry a flow of coolant to the one or more cooling elements according to one of the preceding claims. 
     
     
         26 . Use of an evaporator, especially of a motor vehicle air-conditioning system, as a heat sink for cooling of loads generating heat.