Blower including blades attached to a boss
AssigneeMitsubishi Electric Corporation
InventorsMasahiro Arinaga, Kunihiko Kaga, Shoji Yamada, Yasuaki Kato, Hiroshi Yoshikawa
Life of this patent
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Abstract
A blower that can reduce noise and enhance efficiency by improving a blade structure of the blower used for, for example, an outdoor equipment of an air conditioner. An impeller includes plural blades attached to a peripheral surface of a boss at intervals in a peripheral direction, and a trailing edge of the blade has a protrusion-shaped part in which its central part in a radial direction is curved to expand to a suction side. With such a structure, a discharge velocity of air can be made uniform along the radial direction of the blade, and it becomes possible to reduce noise and to enhance efficiency.
Claims17
A blower comprising:
- an impeller including plural blades attached to a peripheral surface of a boss at intervals in a peripheral direction, each of the plural blades having a trailing border,
- wherein each blade includes a protrusion-shaped part curved to expand to a suction side of the blade at a central part of the blade in a radial direction from a portion of the blade in proximity to the trailing border, to the trailing border, the protrusion-shaped part includes an apex located on the suction side of the trailing border, and the protrusion-shaped part inclines in the radial direction from the apex to a boss side of the trailing border and from the apex to a tip side of the trailing border.
A blower comprising:
- an impeller including plural blades attached to a peripheral surface of a boss at intervals in a peripheral direction,
- wherein for each blade an inclination of a tangent of a camber line of the blade at an equal distance from a rotating shaft increases at a boss side and a tip side from a leading edge toward a trailing edge, increases at a central part in a radial direction from the leading edge toward a vicinity of the trailing edge, and decreases from the vicinity of the trailing edge toward the trailing edge, thereby creating a raised protrusion in the central part that expands to a suction side of the blade.
Dependencies are inferred from the claim text.