Air guide ring and axial flow fan comprising same
AssigneesYork Guangzhou Air Conditioning and Refrigeration Co., Ltd., Tyco Fire & Security GmbH
InventorsBaojun Chang, Qinghua Tang, Xiaokui Ma, Li Wang
Life of this patent
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Abstract
An air guide ring includes an annular air guide portion having an air duct that accommodates an impeller of an axial flow fan configured to rotate therein. The annular air guide portion has an inner side wall and an outer side wall, the air duct is enclosed by the inner side wall, and a plurality of noise reduction devices is arranged on the inner side wall of the annular air guide portion in a circumferential direction of the air guide ring The plurality of noise reduction devices is configured to reduce noise in the air duct.
Claims19
An air guide ring for an axial flow fan, comprising:
- an annular air guide portion, wherein the annular air guide portion has an axis (x) and is rotationally symmetric about the axis (x), the annular air guide portion comprises an air duct configured to accommodate an impeller of the axial flow fan to rotate therein, the annular air guide portion has an inner side wall and an outer side wall, and the air duct is enclosed by the inner side wall;
- and
- a plurality of noise reduction devices, wherein the plurality of noise reduction devices is arranged on the inner side wall of the annular air guide portion in a circumferential direction of the air guide ring, each noise reduction device of the plurality of noise reduction devices comprises a resonant cavity and a connecting tube, the resonant cavity is provided between the inner side wall and the outer side wall, and the connecting tube is connected to the inner side wall and extends from the inner side wall to the corresponding resonant cavity in a radial direction relative to the axis (x),
- wherein each noise reduction device of the plurality of noise reduction devices is configured to reduce noise in the air duct, and each noise reduction device of the plurality of noise reduction devices comprises a channel provided inside the connecting tube, and the channel is in fluid communication with the corresponding resonant cavity and the air duct.
An air guide ring for an axial flow fan, comprising:
- an annular air guide portion, wherein the annular air guide portion has an axis (x) and is rotationally symmetric about the axis (x), the annular air guide portion comprises an air duct configured to accommodate an impeller of the axial flow fan to rotate therein, the annular air guide portion has an inner side wall and an outer side wall, and the air duct is enclosed by the inner side wall;
- and
- a plurality of noise reduction devices, wherein the plurality of noise reduction devices is arranged on the inner side wall of the annular air guide portion in a circumferential direction of the air guide ring, each noise reduction device of the plurality of noise reduction devices comprises a resonant cavity and a connecting tube, the resonant cavity is provided between the inner side wall and the outer side wall, the connecting tube is connected to the inner side wall and extends from the inner side wall to the corresponding resonant cavity in a radial direction relative to the axis (x), and the connecting tube at least partially overlaps a portion of the corresponding resonant cavity in the radial direction,
- wherein each noise reduction device of the plurality of noise reduction devices is configured to reduce noise in the air duct.
Dependencies are inferred from the claim text.