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A blowing apparatus with improved energy efficiency, comprising: a circular wall formed at a distance from a blade end of a fan; a first region where an inner diameter is enlarged so that a clearance with the blade end becomes substantially wide, and a second region having a narrower clearance with

A blowing apparatus with improved energy efficiency, comprising: a circular wall formed at a distance from a blade end of a fan; a first region where an inner diameter is enlarged so that a clearance with the blade end becomes substantially wide, and a second region having a narrower clearance with the blade end and formed with a slit, both regions being on a suction side of the circular wall; and an air pocket portion provided between an outer circumference of the circular wall and an outer peripheral portion of the housing.

대표청구항 ▼

A blowing apparatus with improved energy efficiency, comprising: a circular wall formed at a distance from a blade end of a fan; a first region where an inner diameter is enlarged so that a clearance with the blade end becomes substantially wide, and a second region having a narrower clearance with

A blowing apparatus with improved energy efficiency, comprising: a circular wall formed at a distance from a blade end of a fan; a first region where an inner diameter is enlarged so that a clearance with the blade end becomes substantially wide, and a second region having a narrower clearance with the blade end and formed with a slit, both regions being on a suction side of the circular wall; and an air pocket portion provided between an outer circumference of the circular wall and an outer peripheral portion of the housing. least one blade is attached, having a diameter, as measured in the plane of rotation of the propeller, of 45% of said propeller diameter; a stationary hub which supports said rotating hub; a hub pivot which supports said stationary hub, allowing yaw control of said propeller with respect to the wind; at least one support structure having two ends, the first end of said at least one support structure supporting said hub pivot; the second end being fixed to a foundation; at least one wing with an airfoil cross section, having a span of at least one half of said propeller diameter, enclosing said at least one support structure; at least one wing pivot which supports said wing, allowing yaw control of said wing with respect to the wind; and wherein said at least one wing with an airfoil cross section sheds a tip vortex into said wake of said propeller. 14. A method for generating electricity comprising the step of: turning a generator using a windmill comprising at least one propeller, having a diameter and a wake, wherein said propeller comprises a rotating hub, to which at least one blade is attached, wherein said rotating hub comprises a diameter, as measured in the plane of rotation of the propeller, between 28% and 70% of said propeller diameter; a stationary hub which supports said rotating hub; a hub pivot which supports said stationary hub, allowing yaw control of said propeller with respect to the wind; at least one support structure having two ends, the first end of said at least one support structure supporting said hub pivot; the second end being fixed to a foundation; at least one wing with an airfoil cross section, having a span of at least one half of said propeller diameter, enclosing said at least one support structure; at least one wing pivot which supports said wing, allowing yaw control of said wing with respect to the wind; and wherein said at least one wing with an airfoil cross section sheds a tip vortex into said wake of said propeller. 15. The method of claim 14 further comprising the step of: arranging said windmill in an array. 16. A method for generating electricity comprising the step of: turning a generator using a windmill comprising at least one propeller, having a diameter, wherein said propeller comprises a rotating hub, to which at least one blade is attached, wherein said rotating hub comprises a diameter, as measured in the plane of rotation of the propeller, between 28% and 70% of said propeller diameter; a stationary hub which supports said rotating hub; a hub pivot which supports said stationary hub, allowing yaw control of said propeller with respect to the wind; at least one support structure having two ends, the first end of said at least one support structure supporting said hub pivot; the second end being fixed to a foundation; a coaxial rotating cylinder having a span of at least one half of said propeller diameter, enclosing said at least one support structure.