Axial flow fan
First Claim
1. An axial flow fan, comprising:
- an impeller having a maximum outer diameter; and
a fan frame comprising a first body and a second body, the first body comprising a plurality of connecting ribs and a base, the connecting ribs connected to the base, the second body being a hollow body for disposing around the impeller, the second body comprising a flow passage having a minimum inner diameter, wherein the minimum inner diameter of the flow passage is not larger than the maximum outer diameter of the impeller;
wherein the impeller is mounted on the base of the first body, the second body comprises a first opening, an inner diameter of the first opening is larger than the maximum outer diameter of the impeller;
via the first opening, the second body is mounted around the impeller, and the second body and the first body are combined;
the second body is disposed on a side of the first body, and the side of the first body is opposite of the base of the first body;
wherein an inner side of the first body is straight, part of an outside edge of the impeller is mounted in the straight inner side of the first body, and an inner side of the second body is a narrow structure on a top and a wide structure on a bottom, part of the outside edge of the impeller is mounted in the inner side of the second body;
wherein part of the outside edge of the impeller is an axial outside edge, and the axial outside edge of the impeller is corresponding to a flow passage of the first body, the flow passage of the first body is straight corresponding to a shaft of the impeller, and a portion of the flow passage of the first body is parallel to the impeller.
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Accused Products
Abstract
An axial flow fan is provided. The axial flow fan includes an impeller and a fan frame. The impeller has a maximum outer diameter. The fan frame includes a first body and a second body. The first body includes a plurality of connecting elements and a base. The connecting elements are connected to the base. The second body is a hollow body, and used for disposing around the impeller. The second body includes a flow passage having a minimum inner diameter. The minimum inner diameter of the flow passage is not larger than the maximum outer diameter of the impeller. Therefore, the size of the second body does not restrict the maximum outer diameter of the impeller, and the shape of the impeller and the shape of the fan frame can be designed flexibly according to the practical demand.
29 Citations
8 Claims
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1. An axial flow fan, comprising:
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an impeller having a maximum outer diameter; and a fan frame comprising a first body and a second body, the first body comprising a plurality of connecting ribs and a base, the connecting ribs connected to the base, the second body being a hollow body for disposing around the impeller, the second body comprising a flow passage having a minimum inner diameter, wherein the minimum inner diameter of the flow passage is not larger than the maximum outer diameter of the impeller; wherein the impeller is mounted on the base of the first body, the second body comprises a first opening, an inner diameter of the first opening is larger than the maximum outer diameter of the impeller;
via the first opening, the second body is mounted around the impeller, and the second body and the first body are combined;
the second body is disposed on a side of the first body, and the side of the first body is opposite of the base of the first body;wherein an inner side of the first body is straight, part of an outside edge of the impeller is mounted in the straight inner side of the first body, and an inner side of the second body is a narrow structure on a top and a wide structure on a bottom, part of the outside edge of the impeller is mounted in the inner side of the second body; wherein part of the outside edge of the impeller is an axial outside edge, and the axial outside edge of the impeller is corresponding to a flow passage of the first body, the flow passage of the first body is straight corresponding to a shaft of the impeller, and a portion of the flow passage of the first body is parallel to the impeller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification