Folded sheet metal heat sink

Patent metadata

Field	Value
Publication number	US-2019242568-A1
Application number	US-201716316252-A
Country	US
Kind code	A1
Filing date	Jun 30, 2017
Priority date	Jul 11, 2016
Publication date	Aug 8, 2019
Grant date	—

Abstract

The invention provides a finned heat sink (100) comprising a plurality of fins (200) and a base part (300) from which the fins (200) extend, the fins (200) having a thickness (d1) and a height (h1) with d1/h1<1, the fins (200) having inter-fin distances (d2) with d2/h1<1, the base part (300) comprising a plurality of fin extensions (310) and a support element (320), with the fin extensions (310) configured in a plane (P) of the base part (300) and with the fin extensions (310) associated with the support element (320), wherein the support element (320) includes bridging parts (330) bridging the inter-fin distances (d2), wherein the bridging parts (330) comprise length reducing parts (340) selected from the group comprising a roll (341), a curve (342), and an angle (343). The invention further provides method for producing a finned heat sink (100), an electronic device (1000) comprising a functional component (1100) configured in thermal contact with the finned heat sink (100), a method for producing such electronic device (1000) and a tool (2000) for bending at least part of a bridging part (330) of a finned heat sink (100).

First claim

1 . A finned heat sink folded from a single piece of plate material having a plate thickness (h 4 ) and comprising a base part and a plurality of fins, each fin having:
a first end via which said fin is connected to the base part and extends therefrom, and a second, free end opposite to the first end, the fins having a thickness (d 1 ) equal to the plate thickness (h 4 ) and a height (h 1 ) with d 1 /h 1 <1, the fins having inter-fin distances (d 2 ) with d 2 /h 1 <1, the base part comprising a plurality of fin extensions and a support element, with the fin extensions configured in a plane (P) of the base part and with the fin extensions associated with the support element, wherein the support element includes bridging parts bridging the inter-fin distances (d 2 ), wherein the bridging parts comprise length reducing parts selected from the group comprising a roll, a curve, and at least one angle and each fin being a plate-like, single plated element.

2 . The finned heat sink according to claim 1 , wherein the finned heat sink consists of a single piece of metal.

3 . The finned heat sink according to claim 1 , wherein the fins had an initial inter-fin distance (d 2 *) with d 2 * being essentially equal to d 2 +h 1 .

4 . The finned heat sink according to claim 1 , with the fin extensions having a fin extension thickness (d 3 ) with d 3 =d 1 , and with the support element having a support element thickness (d 4 ) with d 4 =d 1 .

5 . The finned heat sink according to claim 1 , wherein the base part has a base part height (h 3 ) and wherein the length reducing parts have a length reducing part width (w 1 ) wherein h 3 /w 1 =1.

6 . The finned heat sink according to claim 1 , wherein the base part has a base part height (h 3 ) and wherein the length reducing parts have a length reducing part width (w 1 ) wherein h 3 /w 1 <1.

7 . The finned heat sink according to claim 1 , wherein the length reducing parts are V-shaped.

8 . The finned heat sink according to claim 1 , comprising two support elements, wherein two edges defining a fin extension length (l 1 ) are associated with the respective support elements.

9 . The finned heat sink according to claim 1 , consisting of one or more of aluminum and copper.

10 . An electronic device comprising a functional component configured in thermal contact with the finned heat sink according to claim 1 .

11 . The electronic device according to claim 10 , wherein the functional component comprises an electronic component, wherein the electronic component comprises a light source configured in physical contact with the finned heat sink.

12 . A method for producing a finned heat sink, the method comprising:
cutting out fins from a plate over a perimeter of each fin except for a first edge part of said perimeter; the plate having a plate thickness (h 4 ); bending said fins over said first edge parts out of a plane (P) of said plate, thereby generating (i) openings in said plate, (ii) said fins having an initial inter-fin distances (d 2 *), (iii) fin extension, and (iv) a support element, wherein the fin extensions are associated with the support element, wherein the support element bridging the initial inter-fin distance (d 2 *); reducing in a length reducing stage the initial inter-fin distances (d 2 *) by bending at least part of the bridging parts into one or more of a roll, a curve, and an angle, to provide said finned heat sink having inter-fin distances (d 2 ), with d 2 /d 2 *<1.

13 . The method according to claim 12 , wherein before the length reducing stage the bridging parts are configured out of the plane (P) of the said plate, and wherein the length reducing stage includes bending at least part of the bridging parts to provide V-shaped bridging parts.

14 . The method according to claim 12 , wherein before the length reducing stage the bridging parts are configured in the plane (P) of the said plate, wherein the length reducing stage includes bending at least part of the bridging parts to provide V-shaped bridging parts, to provide said bridging parts extending from the plane (P) at the same side as the fins.

15 . (canceled)

Assignees

• Philips Lighting Holding Bv

Inventors

• Luiten Gwendolyn Anita
• Verhoeven Mark Johannes Antonius
• Zuidema Patrick
• Vrehen Joris Jan

Classifications

• H10W70/027

  Mechanical treatments, e.g. deforming, punching or cutting · CPC title

• H10W40/226 Primary

  characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461) · CPC title

• F28D1/0233

  with air flow channels · CPC title

• F21V29/89

  Metals · CPC title

• B23P15/26

  heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)} · CPC title