Blower
AssigneeLG Electronics Inc.
InventorsSung Bae Song, Sung Il Park, Joon Sei Lee
Life of this patent
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Abstract
A blower is disclosed. The blower comprises an impeller and a scroll housing. The impeller is provided with a plurality of blades and rotated. The scroll housing guides and discharges air sucked by the impeller to the outside, and surrounds the impeller. The expansion angle of the curvature radius of the contour of the scroll housing is designed to be less than an expansion angle in conformity with an Archimedic curve in a suction region ranging from a cutoff start angle to 160-200° from a reference angle. Additionally, the expansion angle of the curvature radius of the contour of the scroll housing is designed to be greater than the expansion angle in conformity with the Archimedean curve in a discharge region ranging exceeding 160-200°.
Claims10
A blower, comprising:
- an impeller provided with a plurality of blades;
- and
- a scroll housing for guiding and discharging air sucked by the impeller to the outside, said scroll housing surrounding said impeller,
- wherein an expansion angle of a curvature radius of a contour of said scroll housing is designed to be less than an expansion angle α conformity with an Archimedic curve in a suction region ranging from a cutoff start angle to 160-200° from a reference angle being assigned to a position where the contour curve of the scroll housing ends so that the radius of the scroll housing is shorter than that of the Archimedic curve at a position of 180° from the reference angle by a predetermined length L and to be greater than the expansion angle a in conformity with the Archimedic curve in a discharge region range exceeding 160-200° from the reference angle, so that the radius of the scroll housing is longer than that of the Archimedic curve at a position of 360° of the reference angle by almost the predetermined length L.
A blower, comprising:
- an impeller provided with a plurality of blades;
- and
- a scroll housing for guiding and discharging air sucked by the impeller to the outside, said scroll housing surrounding said impeller,
- wherein an expansion angle of a curvature radius of a contour of said scroll housing is designed to be less than an expansion angle in conformity with an Archimedic curve in a suction region ranging from a cutoff start angle to 160-200° from a reference angle being assigned to a position where the contour curve of the scroll housing ends and to be greater than the expansion angle in conformity with the Archimedic curve in a discharge region range exceeding 160-200° from the reference angle, said curvature radius of the contour of the scroll housing is calculated by the following equations:
- Rθ1=Ro×(1+θx×π/180×tan α1)
- Rθ2=[Ro×(1+θ1×π/180×tan α1)]×(1+θx×π/180×tan α2)+{−δ×(θx−θ1)×(θx−360)}
- wherein Ro denotes a radius of said impeller, θx denotes an optional angle measured from a reference angle to an optional position past a cutoff start angle along a flow direction, θ1 denotes a certain angle within an angular range of 160-200°, Rθ1 and Rθ2 respectively denote a curvature radius in a region where θx is equal to or less than θ1 and a curvature radius in a region where θx exceeds θ1, α1 denotes an expansion angle in a region ranging from the reference angle to an angle of θ1, α2 denotes an expansion angle in a region exceeding θ1, and δ denotes an optional constant.
A blower, comprising:
- a scroll housing provided with a discharge opening;
- an impeller positioned in said scroll housing;
- and
- guide means, mounted to a side wall of said scroll housing, said guide means being slight in thickness and short in height at a portion near said impeller, and increasing in thickness as it projects toward said discharge opening, having a final height approximately equal to the height of the discharge opening.
Dependencies are inferred from the claim text.