Heat Exchanger

Abstract

The invention relates to a heat exchanger ( 1 ) with flow channels ( 3 ), which can be flowed through from a common first inlet to a common first outlet by a first fluid, comprising a housing ( 2 ), which accommodates the flow channels ( 3 ) and which can be flowed through by a second fluid from a second inlet area to a second outlet area. The flow channels ( 3 ) have a flat cross-section as well as longitudinal sides ( 3 a ) and are flow-connected to one another. The invention provides that the longitudinal sides ( 3 a ) of the flow channels ( 3 ) are integrally connected to the housing ( 2 ), particularly by soldering.

1 . A heat exchanger having flow channels through which a first fluid can flow from a common first inlet to a common first outlet, having a housing which holds the flow channels in it and through which a second fluid, which differs from the first fluid (alternatively: and a second fluid different from the first fluid), can flow from a second inlet area to a second outlet area, with the flow channels having a flat cross section and longitudinal faces, wherein the longitudinal faces of the flow channels are integrally connected to the housing. 
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein the flow channels are integrally connected to the housing essentially over the entire length of the longitudinal faces. 
   
   
       3 . The heat exchanger as claimed in  claim 1 , wherein flow channels are in the form of plate pairs and, in conjunction with the housing, form channels for the second fluid to pass through. 
   
   
       4 . The heat exchanger as claimed in  claim 1 , wherein the flow channels and the channels for the second fluid to pass through are essentially accommodated in their entirety by the housing. 
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein at least one flow channel for the first fluid is formed between a cover and a lower plate which is adjacent to the cover. 
   
   
       6 . The heat exchanger as claimed in  claim 1 , wherein at least one flow channel for the first fluid is formed between an upper plate, which is adjacent to a base section of a housing shell, and between the base section of the housing shell. 
   
   
       7 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs have a lower plate and an upper plate which are connected to one another at the rim by a fold. 
   
   
       8 . The heat exchanger as claimed in  claim 1 , wherein at least one inlet flow channel and/or at least one outlet flow channel run/runs transversely through the plate pairs. 
   
   
       9 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs have at least one depression or at least one protrusion. 
   
   
       10 . The heat exchanger as claimed in  claim 1 , wherein the protrusion on a plate pair extends to an adjacent plate pair, touches them, and is integrally connected to the adjacent plate pair. 
   
   
       11 . The heat exchanger as claimed in  claim 1 , wherein the protrusion is incorporated in the upper plate and the protrusion has an upper plate annular surface which touches a lower plate annular surface of the lower plate of an adjacent plate pair and, is integrally connected to the lower plate annular surface by. 
   
   
       12 . The heat exchanger as claimed in  claim 1 , wherein a protrusion is incorporated in the lower plate and the protrusion has a lower plate annular surface which touches an upper plate annular surface of the upper plate of an adjacent plate pair and is integrally connected to the upper plate annular surface soldering. 
   
   
       13 . The heat exchanger as claimed in  claim 1 , wherein the flow channels are stacked. 
   
   
       14 . The heat exchanger as claimed in  claim 1 , wherein the cover is placed on the housing or the housing shells in a stacking direction. 
   
   
       15 . The heat exchanger as claimed in  claim 1 , wherein the upper plate of a plate pair has an upper plate rim surface, and the associated lower plate has a lower plate rim surface, with the upper plate rim surface corresponding to the lower plate rim surface and being integrally connected. 
   
   
       16 . The heat exchanger as claimed in  claim 1 , wherein the longitudinal faces of two plate pairs which form a flow channel clasp one another at least in places, in particular over the entire plate length, and in that, in particular, the longitudinal face which touches the housing clasps the longitudinal face of an adjacent plate, in particular the other plate of the respective plate pair. 
   
   
       17 . The heat exchanger as claimed in  claim 1 , wherein broader faces of two plate pairs which form a flow channel clasp one another at least in places, in particular over the entire plate width. 
   
   
       18 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs have turbulence-generating devices, in particular turbulence inserts or stamped-in structure elements which are arranged in the flow channels. 
   
   
       19 . The heat exchanger as claimed in  claim 9 , wherein the protrusions are conical. 
   
   
       20 . The heat exchanger as claimed in  claim 19 , wherein the protrusions are streamlined in the direction of the longitudinal faces, in particular with an elongated or elliptical cross section. 
   
   
       21 . The heat exchanger as claimed in  claim 1 , wherein turbulence-generating devices, comprising turbulence inserts or structure elements formed from the plate pairs, are arranged between flow channels and/or in the channels for the second fluid to pass through. 
   
   
       22 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs are connected to the housing via their longitudinal-face folded connections. 
   
   
       23 . The heat exchanger as claimed in  claim 1 , wherein the inlet area of the housing is arranged in front of the plate pairs in the flow direction of the second fluid. 
   
   
       24 . The heat exchanger as claimed in  claim 1 , wherein the outlet area of the housing is arranged behind the plate pairs in the flow direction of the second fluid. 
   
   
       25 . The heat exchanger as claimed in  claim 1 , wherein the second fluid can flow around the plate pairs essentially parallel to their longitudinal faces. 
   
   
       26 . The heat exchanger as claimed in  claim 1 , wherein the fold on the longitudinal face is formed by rims of an upper plate and lower plate that are bent in the same sense, and forms a contact surface for the housing. 
   
   
       27 . The heat exchanger as claimed in  claim 1 , wherein the fold on the longitudinal face is formed by rims of an upper plate and lower plate that are bent in opposite senses, and forms a contact surface for the housing. 
   
   
       28 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs have side channels for the first fluid on the longitudinal face in the area of the housing walls. 
   
   
       29 . The heat exchanger as claimed in  claim 28 , wherein the side channels are in the form of an extension of the flow cross section of the plate pairs. 
   
   
       30 . The heat exchanger as claimed in  claim 29 , wherein the extension has a channel height which corresponds essentially to the distance between the plate pairs. 
   
   
       31 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs have a flow cross section with a channel width b, and the housing walls are separated by a distance w, where b<w and material bridges are arranged between the flow cross sections and the housing wall, in particular formed from a lower plate and/or an upper plate. 
   
   
       32 . The heat exchanger as claimed in  claim 1 , wherein the housing is formed in at least two parts, and has a housing shell as well as a cover. 
   
   
       33 . The heat exchanger as claimed in  claim 1 , wherein the inlet area of the housing has an inlet connecting stub, which is arranged in the housing shell or in the cover. 
   
   
       34 . The heat exchanger as claimed in  claim 1 , wherein the outlet area of the housing has an outlet connecting stub, which is arranged in the housing shell or in the cover. 
   
   
       35 . The heat exchanger as claimed in  claim 1 , wherein the housing has an inlet connecting stub and an outlet connecting stub for the first fluid. 
   
   
       36 . The heat exchanger as claimed in  claim 1 , wherein the inlet and outlet connecting stubs for the first fluid are arranged in the cover or in the housing shell. 
   
   
       37 . The heat exchanger as claimed in  claim 1 , wherein the inlet and/or the outlet connecting stubs have longitudinal axes which are at an angle to the plate pairs. 
   
   
       38 . The heat exchanger as claimed in  claim 1 , wherein the heat exchanger has a bypass. 
   
   
       39 . The heat exchanger as claimed in  claim 1 , wherein a bypass channel for the second fluid is arranged within the housing and parallel to the plate pairs. 
   
   
       40 . The heat exchanger as claimed in  claim 1 , wherein a separating wall is arranged in the inlet area for the second fluid. 
   
   
       41 . The heat exchanger as claimed in  claim 1 , wherein a separating wall is arranged in the outlet area for the second fluid. 
   
   
       42 . The heat exchanger as claimed in  claim 1 , wherein the heat exchanger contains at least one non-return valve, which is preferably integrated in the housing and is located in the outlet area. 
   
   
       43 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel is arranged above or below the plate pairs. 
   
   
       44 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel is in the form of a bypass tube which can be inserted into the housing. 
   
   
       45 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel is thermally insulated from the flow channels and/or from the channels for the second fluid to pass through. 
   
   
       46 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel is essentially arranged at a distance from the flow channels and/or from the channels for the second fluid to pass through. 
   
   
       47 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel and/or a flow channel which is adjacent to the bypass channel and/or the channel for the second fluid to pass through have or has projections by means of which the flow channels or the channels for the second fluid to pass through are preferably essentially separated from the bypass tube. 
   
   
       48 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel comprises at least one partial element which is preferably in the form of an open profile and particularly advantageously is in the form of a U-profile or half-tube. 
   
   
       49 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel comprises two tube halves. 
   
   
       50 . The heat exchanger as claimed in  claim 1 , wherein the bypass channel has at least one longitudinal separating wall. 
   
   
       51 . The heat exchanger as claimed in  claim 1 , wherein a bypass flap can be integrated in the inlet or outlet area of the housing. 
   
   
       52 . The heat exchanger as claimed in  claim 1 , wherein the inlet area has two separate inlet connecting stubs as well as one separating wall. 
   
   
       53 . The heat exchanger as claimed in  claim 1 , wherein the plate pairs form a pack through which the second fluid flows on two paths. 
   
   
       54 . The heat exchanger as claimed in  claim 1 , wherein an inlet chamber and an outlet chamber are arranged on one side of the plate pack and a deflection chamber for the second fluid is arranged on the other side of the plate pack. 
   
   
       55 . The heat exchanger as claimed in  claim 39 , wherein the bypass is integrated in the housing. 
   
   
       56 . The heat exchanger as claimed in  claim 39 , wherein the bypass is integrated in the cover. 
   
   
       57 . The heat exchanger as claimed in  claim 1 , wherein the heat exchanger has at least one flap. 
   
   
       58 . The heat exchanger as claimed in  claim 1 , wherein the flap is arranged in the inlet area or in the outlet area. 
   
   
       59 . The heat exchanger as claimed in  claim 1 , wherein the heat exchanger has at least one bypass valve. 
   
   
       60 . The heat exchanger as claimed in  claim 59 , wherein the bypass valve is integrated in the housing. 
   
   
       61 . The heat exchanger as claimed in  claim 59 , wherein the bypass valve is arranged in the inlet area and/or in the outlet area. 
   
   
       62 . The heat exchanger as claimed in  claim 59 , wherein the bypass valve is a combination valve. 
   
   
       63 . The heat exchanger as claimed in  claim 60 , 
     wherein the integrated bypass has a separating wall which can pivot and by means of which the inlet connecting stub and the outlet connecting stub can be short-circuited. 
   
   
       64 . The heat exchanger as claimed in  claim 1 , wherein the first fluid is a liquid coolant, in particular the coolant from the cooling circuit of an internal combustion engine for a motor vehicle, and the second fluid is fed-back exhaust gas from the internal combustion engine. 
   
   
       65 . The heat exchanger as claimed in  claim 1 , wherein the first fluid is air, and the second fluid is fed-back exhaust gas from an internal combustion engine for a motor vehicle. 
   
   
       66 . The heat exchanger as claimed in  claim 1 , wherein the heat exchanger has an oxidation catalytic converter. 
   
   
       67 . The heat exchanger as claimed in  claim 1 , wherein the plate pack is preceded by the oxidation catalytic converter. 
   
   
       68 . The heat exchanger as claimed in  claim 1 , wherein the first fluid is a liquid coolant, in particular the coolant in the cooling circuit of an internal combustion engine for a motor vehicle, and the second fluid is boost air which can be supplied to the internal combustion engine. 
   
   
       69 . The heat exchanger as claimed in  claim 1 , wherein the first fluid is air and the second fluid is boost air which can be supplied to an internal combustion engine for a motor vehicle. 
   
   
       70 . The use of the heat exchanger as claimed in  claim 1 , comprising an exhaust-gas cooler in an exhaust-gas feedback system for an internal combustion engine for a motor vehicle or as a heater for heating the interior of a motor vehicle. 
   
   
       71 . An internal combustion engine for a motor vehicle comprising a heat exchanger as claimed in  claim 1 , employed as a boost-air cooler for direct or indirect cooling of boost air for the internal combustion engine. 
   
   
       72 . A motor vehicle comprising a heat exchanger as claimed in  claim 1 , employed as an oil cooler for cooling engine oil for an internal combustion engine or for cooling gearbox oil for the motor vehicle by means of a liquid coolant. 
   
   
       73 . A climate control system for a motor vehicle comprising a heat exchanger as claimed in  claim 1 , employed as a coolant condenser in a coolant circuit of a climate-control system. 
   
   
       74 . A climate control system for a motor vehicle comprising a heat exchanger as claimed in  claim 1 , employed as a coolant exhaust-gas cooler in a coolant circuit of a climate-control system. 
   
   
       75 . A climate control system for a motor vehicle comprising a heat exchanger as claimed in  claim 1 , employed as a coolant vaporizer in a coolant circuit of the climate-control system.