Heat exchanger, a method of manufacturing same, and applications

• US 5,353,867 A
• Filed: 03/26/1993
• Issued: 10/11/1994
• Est. Priority Date: 03/31/1992
• Status: Expired due to Fees

• Current Assignee: AKZO NV (Nouryon BV)
• Original Assignee: Akzo Nobel N.V. (Nouryon BV)
• Inventors: Jaspers, Martinus J.
• Primary Examiner(s): Rivell, John
• Assistant Examiner(s): LEO, LEONARD R
• Application Number:
  US08/037,942
• Time in Patent Office: 564 Days
• Field of Search: 165/164, 165/165, 165/168, 165/170, 165/908, 361/690
• US Class Current: 165/165
• CPC Class Codes: F28F 13/003 by using permeable mass, perforated or porous materials F28F13/18 takes precedence
• CPC Class Codes: F28F 2215/10 Secondary fins, e.g. projections or recesses on main fins
• CPC Class Codes: F28F 3/025 the means being corrugated, plate-like elements
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H10N 10/13 characterised by the heat-exchanging means at the junction

Abstract

A heat exchanger having on a first and a second side inlets and outlets, respectively, for a preferably gaseous heat exchanging medium, and having a heat exchanging component made of a high thermal conductive material, such as metal, and comprised of a package of lamellae, in which the heat exchanging material has a structure permeable to the heat exchanging medium, and in which channels for the medium passing from the inlet side to the outlet side are formed, such that medium flowing in via the inlet channels can flow to the adjacent outlet channels at an angle to the direction of entry via the heat exchanging material.

Claims

1. A heat exchanger having on a first and a second side inlets and outlets, respectively, for a heat exchanging medium and having a heat exchanging component made of a high thermal conductive material, in which the heat exchanging component has a structure permeable to the heat exchanging medium, and in which component channels positioned side by side and passing from the inlet side to the outlet side are formed, such that medium flowing in via the inlet channels can flow to adjacent outlet channels at an angle to the direction of entry, via the heat exchanging component, said high thermal conductive material being in the form of a number of lamellae assembled in the form of a package, the lamellae individually being permeable to the heat exchanging medium.

2. A heat exchanger according to claim 1 wherein said channels in the medium have been formed in the lamellae and are alternatingly connected to an inlet and an outlet for the medium.

3. A heat exchanger according to claim 1 wherein the lamellae are at least partially contacting, are made of a metal foil, and are of a thickness of 5 to 1000 μ

m.

4. A heat exchanger according to claim 3 wherein the desired permeable structure pattern, the inlet and outlet channel widths for the medium, and the base strip are formed in a foil by an operation preferably selected from the group of etching, build-up, and punching.

5. A heat exchanger according to claim 1 wherein in each lamella the permeable structure is made of the same metal foil and is formed integral with a base strip to which heat can be fed during operation, and the adjacent base strips of successive lamellae together form a base plate.

6. A heat exchanger according to claim 5 wherein the permeable structure in a lamella at the side facing away from the base strip is provided with a vertical top strip formed integral therewith, such that the top strips of successive lamellae form baffles for the medium.

7. A heat exchanger according to claim 5 wherein the base strip and the bearing strip in a lamella are joined at their ends to connecting strips formed integral therewith.

8. A heat exchanger according to claim 5 wherein the adjacent, base plate-forming base strips of successive lamellae are ground flat on the side facing away from the open structures.

9. A heat exchanger according to claim 1 wherein the lamellae forming the heat exchanging component are fixedly interconnected to form a package by means of two or more welding zones provided on the outside of the package.

10. A method of manufacturing the heat exchanger according to claim 1 wherein a plurality of lamellae having the desired permeable structure pattern and the inlet and outlet channel widths for the medium is assembled in the desired relative arrangement in the form of a package.

11. A method according to claim 10 wherein at least partially contacting lamellae are fixedly interconnected on the outside of the package.

12. A method according to claim 11 wherein the fixed interconnection is made with a laser beam or an electron beam.

13. A method according to claim 10 wherein the package of fixedly joined lamellae is ground flat on the base strip side of the lamellae facing away from the open structures.

14. A method according to claim 10 wherein the lamellae comprising the desired permeable structure pattern, the inlet and outlet channel widths for the medium, the base strip, and the bearing strip are made of a metal foil.

15. A method according to claim 14 wherein the production of the lamellae is by an operation selected from the group consisting of etching and punching.

16. A method according to claim 14 wherein a plurality of lamellae is formed side by side in a flat strip of foil.

17. A method according to claim 16 wherein the strip of foil containing a plurality of lamellae is conveyed to a place for mounting, where the lamellae are removed from the strip of foil and then assembled in the desired relative arrangement.

18. A method according to claim 10 wherein the lamellae having the desired permeable structure pattern, the inlet and outlet channel widths for the medium, the base strip, and the bearing strip are formed by the build-up of metal on a carrier in the desired pattern, followed by removal of the carrier.

19. A semiconductor module comprising at least one semi-conductor chip which at the back is connected to a heat exchanger according to claim 1.

20. A device for heating or cooling which comprises a power source and a heat exchanger according to claim 1.

21. A device for heating or cooling as claimed in claim 20 wherein the heat exchanger is combined with the power source.

22. A heat exchanger having on a first and second side inlets and outlets, respectively, for a heat exchanging medium, and having a heat exchanging component made of a high thermal conductive material in which the heat exchanging component has a structure permeable to the heat exchanging medium, and in which structure channels positioned side by side and passing from the inlet side to the outlet side are formed, such that medium flowing in via the inlet channels can flow to adjacent outlet channels at an angle to the direction of entry via the heat exchanging component, said heat exchanging component comprising a number of lamellae assembled in the form of a package, and wherein the lamellae are made of a metal foil in which the desired pattern of permeable structure and the width of the inlet and the outlet channels for the medium have been formed.

23. A heat exchanger according to claim 22 wherein the permeable structure in a lamella at the side opposite to the base strip is formed integral with a bearing strip.

24. A heat exchanger according to claim 23 wherein the top strips in a lamella are formed integral with the bearing strips.

25. A heat exchanger according to claim 22 wherein the permeable structure is formed by a lattice of lattice bars or wires disposed in the plane of a lamella.

26. A heat exchanger according to claim 25 wherein the lattice bars in the plane of the lamella have a width of 5 to 1000 μ

m.

27. A heat exchanger according to claim 26 wherein the permeable structure in a lamella has a gradually, narrowing width in the plane of the lamella in the direction away from the base strip.

28. A heat exchanger according to claim 27 wherein successive permeable structures in a lamella are not more than 5 to 1000 μ

m removed from each other where their widths at the base strip are greatest.

29. A heat exchanger according to claim 27 wherein the permeable structure in a lamella is formed by a group of lattice bars extending toward the base strip in the shape of a fan.

30. A heat exchanger according to claim 22 wherein the circumferential edges of the permeable structures of successive lamellae constitute permeable side walls of said inlet and outlet channels for the medium.

31. A heat exchanger according to claim 30 wherein lattice bars at the circumferential edges of the permeable structures in successive lamellae are staggered.

32. A heat exchanger according to claim 22 wherein the width of the inlet channels in the medium feed direction decrease while the width of the outlet channels in the medium discharge direction increases.