Centrifugal fan and impeller thereof
First Claim
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1. An impeller, comprising:
- a hub having a circumferential surface;
a plurality of connecting structures disposed at intervals and on the circumferential surface of the hub, wherein any adjacent two of the plurality of connecting structures define a first minimum distance therebetween on the circumferential surface;
an annular structure connected to the plurality of connecting structures, wherein the annular structure comprises an outer annular surface; and
a plurality of blades disposed at intervals and on the annular structure, wherein any adjacent two of the plurality of blades define a second minimum distance therebetween on the outer annular surface, adjacent two of the plurality of connecting structures defining the first minimum distance are located between the plurality of blades and the hub, a first difference between any two adjacent first minimum distances is different from a second difference between any two adjacent second minimum distances, and a least common multiple of a number of the plurality of blades and a number of the plurality of connecting structures is a product of the number of the plurality of blades and the number of the plurality of connecting structures.
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Abstract
A centrifugal fan includes an impeller. The impeller includes a hub, a plurality of connecting structures, an annular structure and a plurality of blades. The hub includes a circumferential surface. The connecting structures are disposed on the circumferential surface of the hub at intervals. Any adjacent two of the connecting structures define a first minimum distance on the circumferential surface. At least two first minimum distances are not equal. The annular structure is connected to the connecting structures. The blades are disposed on the annular structure at intervals.
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Citations
18 Claims
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1. An impeller, comprising:
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a hub having a circumferential surface; a plurality of connecting structures disposed at intervals and on the circumferential surface of the hub, wherein any adjacent two of the plurality of connecting structures define a first minimum distance therebetween on the circumferential surface; an annular structure connected to the plurality of connecting structures, wherein the annular structure comprises an outer annular surface; and a plurality of blades disposed at intervals and on the annular structure, wherein any adjacent two of the plurality of blades define a second minimum distance therebetween on the outer annular surface, adjacent two of the plurality of connecting structures defining the first minimum distance are located between the plurality of blades and the hub, a first difference between any two adjacent first minimum distances is different from a second difference between any two adjacent second minimum distances, and a least common multiple of a number of the plurality of blades and a number of the plurality of connecting structures is a product of the number of the plurality of blades and the number of the plurality of connecting structures. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An impeller, comprising:
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a hub having a circumferential surface; a plurality of connecting structures disposed at intervals and on the circumferential surface of the hub, wherein each of the plurality of connecting structures has two opposite end surfaces, end surfaces of two adjacent connecting structures of the plurality of connecting structures define a first minimum distance on the circumferential surface, the two opposite end surfaces of each connecting structure on the circumferential surface is defined as a second minimum distance, and at least two of the second minimum distances are not equal to each other; an annular structure connected to the plurality of connecting structures; and a plurality of blades disposed at intervals and on the annular structure. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A centrifugal fan, comprising:
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a cover having at least one inlet, an outlet and an accommodating space, wherein the inlet, the accommodating space and the outlet are in spatial communication; and an impeller accommodated in the accommodating space of the cover, the impeller comprising; a hub having a circumferential surface; a plurality of connecting structures disposed at intervals and on the circumferential surface of the hub, wherein any adjacent two of the plurality of connecting structures define a first minimum distance therebetween on the circumferential surface; an annular structure connected to the plurality of connecting structures, wherein the annular structure comprises an outer annular surface; and a plurality of blades disposed at intervals and on the annular structure, wherein any adjacent two of the plurality of blades define a second minimum distance therebetween on the outer annular surface, adjacent two of the plurality of connecting structures defining the first minimum distance are located between the plurality of blades and the hub, a first difference between any two adjacent first minimum distances is different from a second difference between any two adjacent second minimum distances, and a least common multiple of a number of the plurality of blades and a number of the plurality of connecting structures is a product of the number of the plurality of blades and the number of the plurality of connecting structures. - View Dependent Claims (16)
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17. A centrifugal fan, comprising:
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a cover having at least one inlet, an outlet and an accommodating space, wherein the inlet, the accommodating space and the outlet are in spatial communication; and an impeller accommodated in the accommodating space of the cover, the impeller comprising; a hub having a circumferential surface; a plurality of connecting structures disposed at intervals and on the circumferential surface of the hub, wherein each of the plurality of connecting structures has two opposite end surfaces, end surfaces of two adjacent connecting structures of the plurality of connecting structures define a first minimum distance on the circumferential surface, the two opposite end surfaces of connecting structure on the circumferential surface is defined as a second minimum distance, and at least two of the first minimum distances are not equal to each other, and at least two of the second minimum distances are not equal to each other; an annular structure connected to the plurality of connecting structures; and a plurality of blades disposed at intervals and on the annular structure. - View Dependent Claims (18)
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Specification