초록 ▼

A heat baffle plate of aluminum or another good heat-conducting metal is secured on a steel member. Since aluminum cannot be welded to steel, connections are utilized which result in a good heat-conducting connection but without direct welding. For example, a steel plate can be placed over a portion

A heat baffle plate of aluminum or another good heat-conducting metal is secured on a steel member. Since aluminum cannot be welded to steel, connections are utilized which result in a good heat-conducting connection but without direct welding. For example, a steel plate can be placed over a portion of the heat baffle plate and then be welded through openings in the aluminum plate to the steel member. The baffle plate can alternatively be supported by a form-locking engagement with a holding plate of steel which is welded to the steel member. The better heat conductivity of the aluminum baffle plate causes the heat emission or heat absorption to be substantially increased for a given structural arrangement in comparison to a heat baffle plate of steel.

대표청구항 ▼

1. A heat exchanger, comprising a steel member and at least one heat baffle plate which is connected heat-conductingly to and projects outwardly from said steel member, wherein said heat baffle plate is made of a metal having a heat conductivity greater than the heat conductivity of steel, wherein s

1. A heat exchanger, comprising a steel member and at least one heat baffle plate which is connected heat-conductingly to and projects outwardly from said steel member, wherein said heat baffle plate is made of a metal having a heat conductivity greater than the heat conductivity of steel, wherein said heat baffle plate is held against said steel member by a further member which is welded to said steel member, and wherein said further member is a steel plate which rests against said heat baffle plate and in plural locations has portions which project through openings in said heat baffle plate, each said portion being welded to said steel member. 2. The heat exchanger according to claim 1, wherein said heat baffle plate is made of aluminum or an aluminum alloy. 3. The heat exchanger according to claim 1, wherein said steel member is a hollow member which is made of platelike steel material and has a cavity for guiding liquid heat carrier medium, and wherein said heat baffle plate has a boss which engages a recess provided in said further member in order to align said further member and said heat baffle plate. 4. The heat exchanger according to claim 1, wherein said openings through said heat baffle plate are previously punched therein and said steel plate is indented in the region of each said portion thereof. 5. The heat exchanger according to claim 1, wherein the melting point of said heat baffle plate is lower than the melting point of steel, wherein said openings said heat baffle plate are formed by melting and evaporation of the material of said heat baffle plate during welding, and wherein an edge of each said opening engages the surface of the portion of said steel plate which projects into the opening. 6. The heat exchanger according to claim 1, wherein said steel plate has approximately the same thickness as said heat baffle plate. 7. The heat exchanger according to claim 1, wherein said heat baffle plate is free of a surface coating. 8. The heat exchanger according to claim 1, wherein said heat baffle plate has a thickness in the range of 0.1 mm to 0.8 mm. 9. The heat exchanger according to claim 1, including a plurality of said heat baffle plates which are each secured on said steel member. 10. The heat exchanger according to claim 9, wherein said heat baffle plates are each bent and each have a fastening leg disposed against said steel member and a further leg which projects outwardly from said steel member. 11. The heat exchanger according to claim 10, wherein each said heat baffle plate is substantially U-shaped and has a web which is said fastening leg and is disposed against said steel member. 12. The heat exchanger according to claim 1, wherein said heat baffle plate has several loops, the apex regions of said loops being disposed against said steel member. 13. The heat exchanger according to claim 12, wherein said loops project outwardly from said steel member and are shaped so that they have a relatively large surface area. 14. A heat exchanger, comprising a hollow steel member which has a cavity through which a liquid heat carrier medium can flow and a heat baffle plate which is dipsosed heat-conductingly against said steel member and projects outwardly therefrom, wherein said heat baffle plate is made of a metal having a heat conductivity which is greater than the heat conductivity of steel, and wherein said heat baffle plate is held against said steel member by a further member which is welded to said steel member. 15. The heat exchanger according to claim 14, wherein said heat baffle plate is made of aluminum or an aluminum alloy. 16. The heat exchanger according to claim 14, wherein said further member is a steel plate which is disposed against said heat baffle plate on a side thereof remote from said steel member and in plural locations has portions which project into openings provided through said heat baffle plate, each said portion being welded to said steel member, and wherein said heat baffle plate has a boss which, for aligning said steel plate and said heat baffle plate, engages a recess provided in said steel plate. 17. The heat exchanger according to claim 16, wherein said heat baffle plate has said openings created therein prior to assembly of said heat exchanger, and wherein each said portion of said steel plate is indented. 18. The heat exchanger according to claim 16, wherein the melting point of said heat baffle plate is lower than the melting point of steel, wherein said openings in said heat baffle plate through which said portions of said steel plate project are formed by melting and evaporation of the material of said heat baffle plate during welding, and wherein an edge of each said opening engages the surface of the associated portion of said steel plate which projects into such opening. 19. The heat exchanger according to claim 16, wherein said steel plate has approximately the same thickness as said heat baffle plate. 20. The heat exchanger according to claim 14, wherein the melting point of the material of said heat baffle plate is lower than the melting point of steel; including a plurality of said further members; and wherein each said further member is a steel particle which is embedded in said heat baffle plate and is welded to said steel member. 21. The heat exchanger according to claim 14, wherein said heat baffle plate is bent and has a fastening leg which is disposed against said steel member and a further leg which projects outwardly from said steel member. 22. The heat exchanger according to claim 21, wherein said heat baffle plate includes a rectangular tubular portion attached to said further leg at an end thereof remote from said steel member. 23. The heat exchanger according to claim 21, wherein said further leg is bent to have a sinuous shape. 24. The heat exchanger according to claim 14, wherein said heat baffle plate is substantially U-shaped and has a web which is disposed against said steel member. 25. The heat exchanger according to claim 14, wherein said heat baffle plate is bent to have a sinuous shape and has a plurality of spaced fastening portions which are provided at spaced locations therealong and which are each disposed against said steel member, and including a plurality of said further members which are each a steel plate disposed against a respective said fastening portion of said heat baffle plate on a side thereof remote from said steel member and which are each welded to said steel member through an opening provided in the adjacent fastening portion of said heat baffle plate.