Multi chamber flat pipe, heat exchanger, and use of a heat exchanger

Abstract

The invention is based on a multi-chamber flat tube (V 1 -V 17 ) having at least two chambers ( 1, 2 ) for holding the flow of a fluid, produced by deforming a sheet-metal strip, in particular produced in a bending and/or folding and/or crimping process, in which a closed profile is formed by: opposite wide walls ( 4, 6 ) which are connected to one another by means of opposite narrow walls ( 5, 7 ) which form in each case one deformed region, with the wide and narrow walls forming outer sides of the profile, with a first wide wall ( 4 ) being formed by an inner section of the sheet-metal strip which is situated between side sections of the sheet-metal strip, and with a second wide wall ( 6 ) being formed by side sections, which are arranged to the sides of the inner section, of the sheet-metal strip, with the first and second wide walls ( 4, 6 ) being connected by means of a web ( 3 ) which separates at least two chambers and which forms an inner side of the profile and which is formed by an edge section ( 3 A, 3 B) of at least one of the side sections, with only one of the side sections having an edge section ( 3 A, 3 B) which runs continuously, in particular from an inner side, of the second wide wall ( 6 ) to, in particular an inner side, of the first wide wall ( 4 ) and is connected there in a cohesive manner, in particular by means of soldering, at a contact point ( 8 ), with the continuous edge section having at least two deformed sections ( 3 B. 1, 3 B. 2, 3 B. 3, 3 B. 4, 3 B. 5 ) and at least one of the deformed sections forming a contact surface ( 9 ) for an edge section ( 3 A) of the other side section. To improve a multi-chamber flat tube of said type, the invention provides the following possible measures, if appropriate in combination. In a first variant, that deformed section of the continuously running edge section ( 3 B) which forms the contact surface ( 9 ) may run obliquely or at right angles with respect to the second wide wall ( 6 ), and at least one further deformed section of the continuously running edge section ( 3 B) may run obliquely or at right angles with respect to that deformed section of the continuously running edge section ( 3 B) which forms the contact surface ( 9 ). In a second variant, that deformed section of the continuously running edge section ( 3 B) which forms the contact surface ( 9 ) may be one of a plurality of deformed sections which are arranged in a v-shape, s-shape, u-shape or o-shape or so as to be wound or folded. In a third variant, it is possible for the edge section ( 3 A) of the other side section not to have a deformed section and to be part, in particular of the first or second region, of the second wide wall ( 6 ). In a fourth alternative, the edge section ( 3 A) of the other side section may have only deformed sections (V 11 -V 14 ) which run at right angles or parallel to the second wide wall, in particular only deformed sections which are arranged in an i-shape or l-shape. The invention also encompasses a multi-chamber flat tube in which at least one of the chambers ( 1, 2 ) is formed by a plurality of walls, in particular two walls, and the web ( 3 ) has at least two of said walls, and at least one edge section ( 3 A) of the side sections is fixed to the web ( 3 ). The invention also encompasses a corresponding heat exchanger and a corresponding use of the heat exchanger.

1 . A multi-chamber flat tube having at least two chambers for holding the flow of a fluid,
 produced by deforming a sheet-metal strip, in particular produced in a bending and/or folding and/or crimping process, in which a closed profile is formed by:   opposite wide walls which are connected to one another by means of opposite narrow walls which form in each case one deformed region, with the wide and narrow walls forming outer sides of the profile, with   a first wide wall being formed by an inner section of the sheet-metal strip which is situated between side sections of the sheet-metal strip, and   with a second wide wall being formed by side sections, which are arranged to the sides of the inner section, of the sheet-metal strip, with   the first and second wide walls being connected by means of a web which separates at least two chambers and which forms an inner side of the profile and which is formed by an edge section of at least one of the side sections, with   only one of the side sections having an edge section which runs continuously from the second wide wall to the first wide wall and is connected there in a cohesive manner, in particular by means of soldering, at a contact point, with   the continuous edge section having at least two deformed sections and at least one of the deformed sections forming a contact surface for an edge section of the other side section,   wherein   a) that deformed section of the continuously running edge section which forms the contact surface runs obliquely or at right angles with respect to the second wide wall, and at least one further deformed section of the continuously running edge section runs obliquely or at right angles with respect to that deformed section of the continuously running edge section which forms the contact surface, and/or   b) that deformed section of the continuously running edge section which forms the contact surface is one of a plurality of deformed sections which are arranged in a v-shape, s-shape, u-shape or o-shape or so as to be wound or folded; and/or   c) the edge section of the other side section does not have a deformed section and is part of the second wide wall, and/or   d) the edge section of the other side section has only deformed sections which run at right angles or parallel to the second wide wall, in particular only deformed sections which are arranged in an i-shape or l-shape.   
   
   
       2 . The multi-chamber flat tube as claimed in  claim 1 , wherein the contact point is formed by means of a large-area contact region of a deformed section. 
   
   
       3 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 the contact point is formed by means of a contact region of a deformed edge between two deformed sections.   
   
   
       4 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 the contact point is formed by means of a contact region of an abutting edge of the continuously running edge section.   
   
   
       5 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 a cohesive connection, in particular soldered connection, is formed on the contact surface between the at least one of the deformed sections of the continuous edge section and the edge section of the other side section.   
   
   
       6 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 at least one of the chambers is formed so as to have one wall, in particular with a wall thickness of less than 0.2 mm.   
   
   
       7 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 at least one of the chambers is formed by a plurality of walls, in particular two walls, in particular with a wall thickness of less than 0.2 mm, preferably wound or formed by walls which are placed concentrically one inside the other.   
   
   
       8 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 further webs are formed by folding in the first and/or second wide wall.   
   
   
       9 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 a tube outer surface and/or a tube inner surface is smooth.   
   
   
       10 . The multi-chamber flat tube as claimed in  claim 1 , wherein
 a tube outer surface and/or a tube inner surface is structured, in particular has one or more types of structure elements which are selected from the group comprising: dimples, winglets, ribs.   
   
   
       11 . The multi-chamber flat tube as claimed in  claim 1  for conducting a fluid in a heat exchanger, in particular a first fluid, preferably in the form of an exhaust gas and/or charge air, or a second fluid, preferably a coolant. 
   
   
       12 . A heat exchanger for exchanging heat between a first fluid, in particular an exhaust gas and/or charge air, and a second fluid, in particular a coolant, having:
 a block for the separate and heat-exchanging guidance of the first and second fluids, having
 a number of flow ducts through which the first fluid can flow, 
 a first chamber which holds the flow ducts and through which the second fluid can flow, 
 a housing in which the chamber and the flow ducts are arranged; 
   wherein   a flow duct is formed in the manner of a flat tube as claimed in  claim 1 .   
   
   
       13 . The use of the heat exchanger as claimed in  claim 12  as a high-temperature or low-temperature heat exchanger. 
   
   
       14 . The use of the heat exchanger as claimed in  claim 12 , in particular an exhaust-gas heat exchanger, as an exhaust-gas cooler for exhaust-gas cooling in an exhaust-gas recirculation system of an internal combustion engine of a motor vehicle. 
   
   
       15 . The use of the heat exchanger as claimed in  claim 14 , in particular an exhaust-gas heat exchanger, as an auxiliary heater for heating the interior space of a motor vehicle. 
   
   
       16 . The use of the heat exchanger as claimed in  claim 12  AS a charge-air cooler for the direct or indirect cooling of charge air in a charge-air supply system for an internal combustion engine of a motor vehicle. 
   
   
       17 . The use of the heat exchanger as claimed in  claim 12  as an oil cooler, in particular for cooling engine oil and/or transmission oil. 
   
   
       18 . The use of the heat exchanger as claimed in  claim 12  as a refrigerant or coolant cooler and/or refrigerant or coolant condenser in a refrigerant or coolant circuit of an air-conditioning system or of an engine cooling circuit of a motor vehicle. 
   
   
       19 . A multi-chamber flat tube having at least two chambers for holding the flow of a fluid,
 produced by deforming a sheet-metal strip, in particular produced in a bending and/or folding and/or crimping process, in which a closed profile is formed by:   opposite wide walls which are connected to one another by means of opposite narrow walls which form in each case one deformed region, with the wide and narrow walls forming outer sides of the profile, with   a first wide wall being formed by an inner section of the sheet-metal strip which is situated between side sections of the sheet-metal strip, and   with a second wide wall being formed by side sections, which are arranged to the sides of the inner section, of the sheet-metal strip, with   the first and second wide walls being connected by means of a web which separates at least two chambers and which forms an inner side of the profile,   wherein   at least one of the chambers is formed by a plurality of walls, in particular two walls, and the web has at least two of said walls, and at least one edge section of the side sections is fixed to the web.   
   
   
       20 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   at least one of the chambers is wound with a plurality of walls, in particular two walls, in particular the web has at least two walls which are formed as part of the winding.   
   
   
       21 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   two walls of the web are formed by means of a folded-in portion.   
   
   
       22 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   at least one of the chambers is formed by a plurality of walls which are placed concentrically one inside the other, in particular two walls, in particular the web has at least two walls which are formed as part of the walls which are placed one inside the other.   
   
   
       23 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   an edge section of at least one of the side sections adjoins the web, in particular the edge section abuts with an abutment edge against the web.   
   
   
       24 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   the web is formed by an edge section of at least one of the side sections, in particular the edge section bears with a contact surface against the web.   
   
   
       25 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   an abutment edge of the edge section is exposed.   
   
   
       26 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   an abutment edge of the edge section is fixed to the first wide wall.   
   
   
       27 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   a wall thickness is formed so as to be less than 0.2 mm.   
   
   
       28 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   a cohesive connection, in particular soldered connection, is formed on one or more contact surfaces or points between walls.   
   
   
       29 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   further webs are formed by folding in the first and/or second wide wall.   
   
   
       30 . The multi-chamber flat tube as claimed in  claim 19 ,
 wherein   a tube outer surface and/or a tube inner surface is smooth.   
   
   
       31 . The multi-chamber flat tube as claimed in  claim 19  for conducting a fluid in a heat exchanger, in particular a first fluid, preferably in the form of an exhaust gas and/or charge air, or a second fluid, preferably a coolant. 
   
   
       32 . A heat exchanger for exchanging heat between a first fluid, in particular an exhaust gas and/or charge air, and a second fluid, in particular a coolant, having:
 a block for the separate and heat-exchanging guidance of the first and second fluids, having
 a number of flow ducts through which the first fluid can flow, 
 a first chamber which holds the flow ducts and through which the second fluid can flow, 
 a housing in which the chamber and the flow ducts are arranged; 
   wherein   a flow duct is formed in the manner of a flat tube as claimed in  claim 19 .   
   
   
       33 . The use of the heat exchanger as claimed in  claim 32  as a high-temperature or low-temperature heat exchanger. 
   
   
       34 . The use of the heat exchanger as claimed in  claim 32 , in particular an exhaust-gas heat exchanger, as an exhaust-gas cooler for exhaust-gas cooling in an exhaust-gas recirculation system of an internal combustion engine of a motor vehicle. 
   
   
       35 . The use of the heat exchanger as claimed in  claim 34 , in particular an exhaust-gas heat exchanger, as an auxiliary heater for heating the interior space of a motor vehicle. 
   
   
       36 . The use of the heat exchanger as claimed in  claim 32  as a charge-air cooler for the direct or indirect cooling of charge air in a charge-air supply system for an internal combustion engine of a motor vehicle. 
   
   
       37 . The use of the heat exchanger as claimed in  claim 32  as an oil cooler, in particular for cooling engine oil and/or transmission oil. 
   
   
       38 . The use of the heat exchanger as claimed in  claim 32  as a refrigerant or coolant cooler and/or refrigerant or coolant condenser in a refrigerant or coolant circuit of an air-conditioning system or of an engine cooling circuit of a motor vehicle.