Heat dissipation module and flow direction controlling structure thereof

  • US 7,529,088 B2
  • Filed: 10/11/2005
  • Issued: 05/05/2009
  • Est. Priority Date: 10/15/2004
  • Status: Active Grant
First Claim
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1. A heat dissipation module, comprising:

  • a housing;

    at least two impellers disposed in the housing; and

    a flow direction controlling structure, comprising a limiting element and a plurality of rotatable elements disposed at an outlet of the housing;

    wherein each of the rotatable elements comprises a fixed end and a correspondingly movable end, for guiding airflow;

    wherein the impellers comprise a first impeller and a second impeller, and when outlet pressure of corresponding to the first impeller and the second impeller are different, the movable ends of the rotatable elements deflect to the first impeller or the second impeller to change outlet areas of the first impeller and the second impeller, and when the first impeller and the second impeller are in operation, the limiting element limits the movable ends of the rotatable elements from deflecting to the first impeller or the second impeller.

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