Fan device and vacuum cleaner including the same
First Claim
1. A fan device comprising:
- an impeller that rotates around a central axis extending in a top-bottom direction; and
a motor that is disposed below the impeller in the top-bottom direction and rotates the impeller,the impeller includinga base unit that is enlarged toward a downward direction, andblades that are disposed on a peripheral surface of the base unit, whereinupper portions of the blades are positioned at a leading end of a rotating direction with respect to lower portions of the blades,in an outer end portion on a front surface of each of the blades which is positioned at the leading end of the rotating direction, a radial-direction component of a normal unit vector of an upper end portion of the blade is smaller than a radial-direction component of a normal unit vector of a lower end portion of the blade, assuming that an outer peripheral side of the blade is a positive direction,a thickness of a root of the lower end portion is larger than a thickness of a root of the upper end portion, andportions of radially outermost edges of the blades are positioned radially outward from a radially outermost edge of the base unit along an entirety of the rotating direction.
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Accused Products
Abstract
A fan device includes an impeller rotating around a central axis and a motor disposed farther downward than the impeller. The impeller includes a base unit enlarged downward and plural blades disposed on a peripheral surface of the base unit. Upper portions of the blades are positioned at a leading end of a rotating direction with respect to lower portions. In an outer end portion on a front surface of each blade at the leading end of the rotating direction, a radial-direction component of a normal unit vector of an upper end portion of the blade is smaller than that of a lower end portion, assuming that an outer peripheral side of the blade is a positive direction. A thickness of a root of the lower end portion is larger than that of the upper end portion.
41 Citations
12 Claims
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1. A fan device comprising:
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an impeller that rotates around a central axis extending in a top-bottom direction; and a motor that is disposed below the impeller in the top-bottom direction and rotates the impeller, the impeller including a base unit that is enlarged toward a downward direction, and blades that are disposed on a peripheral surface of the base unit, wherein upper portions of the blades are positioned at a leading end of a rotating direction with respect to lower portions of the blades, in an outer end portion on a front surface of each of the blades which is positioned at the leading end of the rotating direction, a radial-direction component of a normal unit vector of an upper end portion of the blade is smaller than a radial-direction component of a normal unit vector of a lower end portion of the blade, assuming that an outer peripheral side of the blade is a positive direction, a thickness of a root of the lower end portion is larger than a thickness of a root of the upper end portion, and portions of radially outermost edges of the blades are positioned radially outward from a radially outermost edge of the base unit along an entirety of the rotating direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification