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US 2025/0084870 A1Published application
Cover, fan unit, and ventilation fan
AssigneeDelta Electronics, Inc.
InventorsYing-Huang CHUANG, Wen-Chih LI, Chun-Wei CHEN
Life of this patent
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Abstract
A cover used in a ventilation fan includes a noise reduction structure and a shelter. The noise reduction structure has an air inlet, a flat portion surrounding the air inlet, and a peripheral portion surrounding the flat portion. The sidewall of the flat portion extends in a vertical direction from the peripheral portion. The bottom surface of the flat portion extends in a horizontal direction from the sidewall, and is a flat surface. The shelter is disposed on the peripheral portion and covers the air inlet.
Claims20
A cover, comprising:
- a noise reduction structure having an air inlet, a flat portion surrounding the air inlet, and a peripheral portion surrounding the flat portion, wherein a sidewall of the flat portion extends in a vertical direction from the peripheral portion, a bottom surface of the flat portion extends in a horizontal direction from the sidewall of the flat portion, and the bottom surface of the flat portion is a flat surface;
- and
- a shelter disposed on the peripheral portion and covers the air inlet.
A fan unit, comprising:
- a motor;
- an impeller connected to the motor;
- and
- a vortex flow channel surrounding the impeller along a circumferential direction of the impeller, and having an air outlet, wherein a top portion of the vortex flow channel comprises a curved surface, a diameter and a cross-sectional height of the curved surface are gradually increased from the air outlet to an area along the circumferential direction, and the area is passed by a cross section that passes through a center of the impeller and is parallel to the air outlet.
1 more element
A ventilation fan, comprising:
- a housing, wherein a top edge of the housing surrounds an opening;
- a fan unit located in the housing and comprising:
- a motor;
- an impeller connected to the motor;
- and
- a vortex flow channel surrounding the impeller along a circumferential direction of the impeller, and having an air outlet, wherein a top portion of the vortex flow channel comprises a curved surface, a diameter and a cross-sectional height of the curved surface are gradually increased from the air outlet to an area along the circumferential direction, and the area is passed by a cross section that passes through a center of the impeller and is parallel to the air outlet;
- and
- a cover located on the top edge of the housing and covering the opening, and comprising:
- a noise reduction structure having an air inlet, a flat portion surrounding the air inlet, and a peripheral portion surrounding the flat portion, wherein a sidewall of the flat portion extends in a vertical direction from the peripheral portion, a bottom surface of the flat portion extends in a horizontal direction from the sidewall of the flat portion, and the bottom surface of the flat portion is a flat surface;
- and
- a shelter disposed on the peripheral portion and covers the air inlet.
8 more elements
Dependencies are inferred from the claim text.