AIR BLOWING DEVICE AND VACUUM CLEANER
1 Assignment
0 Petitions
Accused Products
Abstract
An air blowing device includes a motor, a ring-shaped cover, an impeller, and an impeller housing. The impeller includes a base portion and moving blades. The impeller housing includes an exhaust air guide portion. The ring-shaped cover includes a ring-shaped cover upper face portion and a ring-shaped cover outer edge portion having faces disposed across a gap that configures a flow path through which a fluid is guided. The gap has a first width where a distance between the faces is shortest, and which is smaller than a flow-in opening width where the fluid flows into the gap and a flow-out opening width where the fluid flows out.
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Citations
36 Claims
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1-18. -18. (canceled)
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19. An air blowing device, comprising:
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a motor having a shaft that is disposed following a central axis extending in a vertical direction; a ring-shaped cover that is disposed further to an upper side in an axial direction than the motor; an impeller fixed to the shaft; and an impeller housing that encompasses above the impeller and the outer side thereof in the radial direction, wherein the impeller includes a base portion that spreads in a direction intersecting the shaft, and a plurality of moving blades that are connected to the base portion and arrayed in a peripheral direction, wherein the impeller housing includes an exhaust air guide portion that extends toward an outer side in the radial direction and toward a lower side, at a side further outward from an outer edge of the impeller in the radial direction, wherein the ring-shaped cover includes a ring-shaped cover upper face portion that spreads in a direction intersecting the shaft, and faces the base portion in the axial direction, and a ring-shaped cover outer edge portion that is positioned further on the outer side from the outer edge of the impeller in the radial direction, wherein an outer face of the ring-shaped cover outer edge portion and an inner face of the exhaust air guide portion are disposed across a gap, and the gap configures a flow path through which a fluid flowing in from the impeller is guided, wherein the gap has a first width where a distance between the outer face of the ring-shaped cover outer edge portion and the inner face of the exhaust air guide portion is shortest, in a region further to the outer side from the radial-direction inner edge of the ring-shaped cover outer edge portion and further to the inner side from the radial-direction outer edge of the ring-shaped cover outer edge portion, and wherein the first width is smaller than a flow-in opening width where the fluid flows into the gap and a flow-out opening width where the fluid flows out from the gap. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 36)
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32. An air blowing device, comprising:
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a motor having a shaft that is disposed following a central axis extending in a vertical direction; a ring-shaped cover portion that is disposed further to an upper side in an axial direction than the motor; an impeller fixed to the shaft; and an impeller housing that encompasses above the impeller and the outer side thereof in the radial direction, wherein the impeller includes a flat plate-shaped base portion that spreads in a direction orthogonal to the shaft, and a shroud that is positioned further to the upper side than the base portion and opens toward the upper side, a plurality of moving blades that are connected to the base portion and the shroud, and arrayed in a peripheral direction, wherein the impeller housing includes an exhaust air guide portion that extends toward an outer side in the radial direction and toward a lower side, at a side further outward from an outer edge of the impeller in the radial direction, wherein the ring-shaped cover portion includes a ring-shaped-cover flat face portion that spreads in a direction orthogonal to the shaft, and faces the base portion in the axial direction, and a protruding portion that protrudes further toward the upper side than the ring-shaped-cover flat face portion, and of which the outer peripheral face has an inclined face that is progressively inclined downwards toward the outer side in the radial direction at a position further to the outward side from the outer edge of the impeller in the radial direction, wherein the exhaust air guide portion has a guide-portion inner-side recessed portion where the inner peripheral face is recessed, and a guide-portion inner-side protruding portion situated to the lower side of the guide-portion inner-side recessed portion of which the inner face bulges, and wherein a distance between the inclined face and the inner face of the exhaust air guide portion is shortest, in a region where the guide-portion inner-side protruding portion and the inclined face face each other. - View Dependent Claims (33, 34, 35)
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Specification