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Device and method for air filtration

  • US 6,821,310 B2
  • Filed: 10/30/2002
  • Issued: 11/23/2004
  • Est. Priority Date: 02/28/2000
  • Status: Expired due to Term
First Claim
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1. Device for air filtration comprisinghousing having at least one part of a wall adapted to be comprised of an air filter, a suction fan mounted inside the housing to suck in air from the surroundings through said air filter, and at least one fan exhaust for filtered, cleaned air, said air filter including at least two different parallel coupled filter units, which are adapted to clean the air each in a different way, the different filter units being adjusted to each other with respect to pressure drop for air to be cleaned passing the filter units so that in operation a predetermined part of total sucked-in air to be cleaned passes through each respective filter unit and thus is subjected to filtration through a respective filter unit, and elements positioned in the housing for mixing the differently cleaned parts before the exhaust.

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