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Disclosed is a method that modifies current heat sinking fins by punching the fin plates with "cheese grate" perforations. Benefits include improving the performance of the heat exchanger.
English (United States)
This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
87% of the total text.
Heat Flux Aligned “Cheese Grate” Punched
Heat Exchanger Fins for Heat Pipe Penetrated Heat Exchangers
Disclosed is a method that modifies current heat sinking
fins by punching the fin plates with “cheese grate” perforations. Benefits
include improving the performance of the heat exchanger.
Contemporary mobile computer thermal solutions usually use a
heat exchanger made up of four parts; a heat spreader block on the processor, a
heat pipe, a set of heat sinking fins, and a fan providing airflow to the fins.
Current heat sinking fins are solid plates made of copper.
The disclosed method mechanically modifies the heat sinking
fins. This modification is achieved by punching the fin plates with “cheese
grate” perforations; the perforations are placed in very specific orientations
to avoid deterioration of the fin efficiency and performance while improving
the ability for flow to mix in the cooling channels between fins (see Figure 1).
The specific orientation relates to the direction of heat fluxes in the
conduction path of the fins. By aligning the direction of the punched cut of
the “cheese grate” with the heat fluxes, the ability of the fins to conduct
heat is not impacted. The size and depth of the “cheese grate” punches are
optimized to maximize the tradeoff between enhanced flow mixing and added
The disclosed method is a relatively simple manufacturing
procedure that improves the performance of con...