Cooling fans fit in 3- and 2-mm thicknesses

October 23, 2014 // By Graham Prophet
As mobile devices are becoming slimmer, Sunon is providing a full range of 2-mm thickness, or below, cooling fans.

Mobile products now host multi-core processors, and cooling is more critical than ever. Sunon, with a 32-year history in innovation in the miniature cooling field, is creating various "thin and light cooling fan" series. These measure 30 x 30 x 3 mm to 8 x 8 x 3 mm, in addition to products of 2mm thickness or below that can be custom-made.

Traditional fans are 0.6-cm minimum thickness. They have a large interior space and use washers, retaining rings, and other necessary parts. Moreover, they fix the fan in place and enable it to rotate using silicon steel and magnets which supply magnetic lines of force. With slim cooling fans, however, thickness is significantly reduced to 0.4cm or smaller and their internal space is greatly reduced. As no washers and retaining rings are used and magnetic lines of force become insufficient when rotating, known problems with “thinned” fans are include blade run-outs, blade loosening, and ineffective dust blocking. All these will impact the cooling efficiency, even endangering the product's service life, and Sunon believes it has overcome all of these issues.

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