Duct fan
First Claim
1. A duct fan adapted to be arranged in a duct for transport of air between an upstream duct part and a downstream duct part, said fan comprising a housing (4) having substantially the shape of a rectangular parallelepiped and inside thereof a fan member in the form of an impeller (5) and a motor (6) for rotation thereof, a member (7) for connecting a first inlet side (8) of the housing to said upstream duct part for sucking air in therefrom and a member (9) for connecting a second outlet side (10) of the housing located opposite to said first side to said downstream duct part for exhausting air thereto, said impeller being a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from said inlet to said outlet, whereinthe outlet connecting member (9) is designed to define an airflow path tapering substantially conically in the outlet towards the end of that member adapted to adjoin to a said downstream duct part, andwhen viewing the housing (4) in the direction of the axis of rotation of the impeller, the center line of the opening (13) of the outlet connecting member (9) cone for connecting to said downstream duct part is substantially offset with respect to a center line of the housing extending from said first (8) to said second (10) housing side.
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Accused Products
Abstract
A duct fan comprises a housing (4) having substantially the shape of a rectangular parallelepiped and inside thereof an impeller (5) and a motor for rotation thereof. The fan has also a member for connecting an inlet side of the housing to an upstream duct part for sucking air in therefrom and a member for connecting an outlet side of the housing to a downstream duct part for exhausting air thereto. The impeller is a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from the inlet to the outlet. The outlet connecting member is designed to define an airflow path tapering substantially conically in the outlet towards the end of that member adapted to adjoin to a said downstream duct part.
33 Citations
28 Claims
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1. A duct fan adapted to be arranged in a duct for transport of air between an upstream duct part and a downstream duct part, said fan comprising a housing (4) having substantially the shape of a rectangular parallelepiped and inside thereof a fan member in the form of an impeller (5) and a motor (6) for rotation thereof, a member (7) for connecting a first inlet side (8) of the housing to said upstream duct part for sucking air in therefrom and a member (9) for connecting a second outlet side (10) of the housing located opposite to said first side to said downstream duct part for exhausting air thereto, said impeller being a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from said inlet to said outlet, wherein
the outlet connecting member (9) is designed to define an airflow path tapering substantially conically in the outlet towards the end of that member adapted to adjoin to a said downstream duct part, and when viewing the housing (4) in the direction of the axis of rotation of the impeller, the center line of the opening (13) of the outlet connecting member (9) cone for connecting to said downstream duct part is substantially offset with respect to a center line of the housing extending from said first (8) to said second (10) housing side.
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16. A duct fan adapted to be arranged in a duct for transport of air between an upstream duct part and a downstream duct part, said fan comprising a housing (4) having substantially the shape of a rectangular parallelepiped and inside thereof a fan member in the form of an impeller (5) and a motor (6) for rotation thereof, a member (7) for connecting a first inlet side (8) of the housing to said upstream duct part for sucking air in therefrom and a member (9) for connecting a second outlet side (10) of the housing located opposite to said first side to said downstream duct part for exhausting air thereto, said impeller being a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from said inlet to said outlet, wherein
the outlet connecting member (9) is designed to define an airflow path tapering substantially conically in the outlet towards the end of that member adapted to adjoin to a said downstream duct part, and when viewing the housing (4) in the direction of the axis of rotation of the impeller, the axis of rotation of the impeller (5) is offset with respect to a center line of the housing (4) extending from said first (8) to said second (10) housing side.
Specification