HEAT DISSIPATING DEVICE AND METHOD OF MANUFACTURE THEREOF
A heat dissipating device and a method of fabricating thereof, the device comprising a first base adapted to be placed in contact with a heat emitter and first heat-dissipating fins extending from the first base on at least part of a periphery of the first base. The method comprises providing a first sheet of heat conductive and mechanically resistant material; cutting, out of the first sheet of material, a first piece comprising a first central part and first tabs extending radially from the first central part; and erecting the first tabs up from the first central part.
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This application claims benefit, under 35 U.S.C. §119(e), of U.S. provisional application serial No. 61/414,157, filed on Nov. 16, 2010. All documents above are incorporated herein in their entirety by reference.
FIELD OF THE INVENTIONThe present invention relates to heat dissipating devices.
SUMMARY OF THE INVENTIONMore specifically, in accordance with the present invention, there is provided a heat dissipating device comprising a first base adapted to be placed in contact with a heat emitter and first heat-dissipating fins extending from the first base on at least part of a periphery of the first base.
There is further provided a method of fabricating a heat dissipating device, comprising providing a first sheet of heat conductive and mechanically resistant material; cutting, out of the first sheet of material, a first piece comprising a first central part and first tabs extending radially from the first central part; and erecting the first tabs up from the first central part.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of specific embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
There is generally provided a heat dissipating device, based on natural convection cooling or forced convection cooling. In the following, it will be described as a heat sink for use in light housings, such as in recessed LED light housings for example, but could be used in other applications.
As illustrated for example in
The base 12 is intended to be placed in contact with a heat emitter (not shown in
The fins 14 extend from the base 12 at an angle α (see
The fins 14 have a length generally determined by the geometry of the light housing, and are shown herein having a trapezoidal shape. Other shapes and different lengths are possible, depending on the requirements of specific installation, such as mobile trims for example (see
The heat sink 10 may be made in a single metal sheet as now described.
As shown in
The material of the metal sheet is selected to have a good heat transfer capacity as well as a mechanical resistance. Aluminum may be used for example.
As best seen in
The angled orientation of the fins 14 relative to the base 12 (angle α) allows accommodating air passages for the air to flow away from the base 12 between the fins 14, thereby increasing the cooling surface provided by the fins 14, compared to fins extending perpendicularly to the base 12 for example.
Moreover, as shown in
In an embodiment illustrated in
Comparative tests were performed to assess the performances of heat sinks according to embodiments of the present invention, as will now be described in relations to
In
As shown in
In
As shown in
Three temperature probes were attached to each heat sink, at equivalent positions relative to the heat sinks (see
For the heat sinks 60 and 200, the temperature of the heat source (i.e. immediately under the base of the heat sinks), of the heat sinks in their center, and of the heat sinks on a most exterior point thereof (column 4-6 in Tables I and II respectively) were monitored.
For the heat sinks 100 and 110 according to embodiments of the present invention, the temperature of the heat source, of the heat sinks in their center, and of the heat sinks on their exterior (column 7-9 in Tables I and II) were monitored.
As can be seen from Tables I and II, the heat sinks according to embodiments of the present invention provide an optimized ratio between working (i.e. heat dissipating) surface and volume of material needed for their manufacture, for application in light housings, such as led light housings for example.
As people in the art will appreciate, the present system and method may be used to dissipate heat in computer devices, electric motors, heating radiators, conditioning devices etc.
Although the present invention has been described hereinabove by way of embodiments thereof, it may be modified, without departing from the nature and teachings of the subject invention as claimed herein
Claims
1. A heat dissipating device, comprising a first base adapted to be placed in contact with a heat emitter and first heat-dissipating fins extending from said first base on at least part of a periphery of said first base.
2. The heat dissipating device of claim 1, wherein said first heat-dissipating fins extend from said first base at a first angle.
3. The heat dissipating device of claim 1, wherein said first heat-dissipating fins extend from said first base on at least part of a periphery of said first base, a main surface of said first base remaining free of said first fins.
4. The heat dissipating device of claim 1, wherein said first base and said first fins are made from a metal sheet.
5. The heat dissipating device of claim 1, comprising a second base adapted to be placed in contact with said first base and second heat-dissipating fins extending from at least part of a periphery of said second base at a second angle.
6. The heat dissipating device of claim 1, wherein said first base comprises holes therein.
7. The heat dissipating device of claim 5, wherein said second base comprises holes therein.
8. The heat dissipating device of claim 5, wherein at least one of said first and said second bases comprises holes therein.
9. A method of fabricating a heat dissipating device, comprising:
- providing a first sheet of heat conductive and mechanically resistant material;
- cutting, out of the first sheet of material, a first piece comprising a first central part and first tabs extending radially from the first central part; and
- erecting the first tabs up from the first central part.
10. The method of claim 9, wherein said erecting the first tabs up from the first central part comprises folding the first tabs up away from the first central part at a first angle.
11. The method of claim 9, wherein said providing a first sheet comprises providing a sheet comprising aluminum.
12. The method of claim 9, further comprising positioning the heat dissipating device with the first central part in contact with a heat emitter, the first tabs extending up from the perimeter of the first central part away from the heat emitter.
13. The method of claim 9, further comprising:
- providing a second sheet of heat conductive and mechanically resistant material;
- cutting, out of the second sheet of material, a second piece comprising a second central part and second tabs extending radially from the second central part;
- erecting the second tabs up from the second central part;
- placing said first central part in contact with a heat emitter, said first tabs extending from said first central part on at least part of a periphery of said first central part; and
- placing said second central part in contact with said first central part, said second tabs extending from said second central part on at least part of a periphery of said second central part.
14. The method of claim 9, further comprising providing holes in the first central part.
15. The method of claim 9, further comprising:
- providing a second sheet of heat conductive and mechanically resistant material;
- cutting, out of the second sheet of material, a second piece comprising a second central part and second tabs extending radially from the second central part;
- providing holes in at least one of the first central part and the second central part;
- erecting the second tabs up from the second central part;
- placing said first central part in contact with a heat emitter, said first tabs extending from said first central part on at least part of a periphery of said first central part; and
- placing said second central part in contact with said first central part, said second tabs extending from said second central part on at least part of a periphery of said second central part.
Type: Application
Filed: Jul 25, 2011
Publication Date: May 17, 2012
Applicant: ECLAIRAGE CONTRASTE M.L. INC. (Saint-Jean-Chrysostome)
Inventor: SIMON LANGLOIS (St-Jean-Chrysostome)
Application Number: 13/189,777
International Classification: F28F 7/00 (20060101); B21D 53/02 (20060101);