Ventilation fan
First Claim
1. A ventilation fan assembly, comprising:
- a fan comprising;
a base supporting a driving device,a scroll casing having an air inlet,an air outlet,a top portion,a bottom portion corresponding to the top portion, anda slope surface connecting the top portion and an edge of the air outlet, wherein the top portion and the bottom portion together define a channel height, a ratio of the channel height to a height of the air outlet ranges from 1.1 to 2, and the channel height ranges from 110 mm to 200 mm, andan impeller disposed in the scroll casing, wherein the driving device drives the impeller to rotate; and
a housing for accommodating the fan and having an opening corresponding to the air outlet of the scroll casing, wherein an air outlet duct is disposed on the side of the housing and communicated with the air outlet of the scroll casing, and a baffle is disposed inside the air outlet duct;
wherein the air inlet has a circular edge, the circular edge has a first point, a second point and a third point, the first point is closer to the opening than the third point, the second point is between the first point and the third point along the circular edge, and the slope surface is connected to the top portion beside the second point of the circular edge.
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Accused Products
Abstract
A ventilation fan includes a fan and a housing. The fan includes a base, a scroll casing, and an impeller. The base is used for supporting a driving device. The scroll casing has an air inlet, an air outlet, a top portion, a bottom portion corresponding to the top portion, and a slope surface connecting the top portion and an edge of the air outlet. The top portion and the bottom portion together define a channel height, and the ratio of the channel height to the height of the air outlet ranges from 1.1 to 2. The channel height ranges from 110 mm to 200 mm. The impeller is disposed in the scroll casing, and the driving device drives the impeller to rotate. The housing is used for accommodating the fan, and has an opening corresponding to the air outlet of the scroll casing.
18 Citations
17 Claims
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1. A ventilation fan assembly, comprising:
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a fan comprising; a base supporting a driving device, a scroll casing having an air inlet, an air outlet, a top portion, a bottom portion corresponding to the top portion, and a slope surface connecting the top portion and an edge of the air outlet, wherein the top portion and the bottom portion together define a channel height, a ratio of the channel height to a height of the air outlet ranges from 1.1 to 2, and the channel height ranges from 110 mm to 200 mm, and an impeller disposed in the scroll casing, wherein the driving device drives the impeller to rotate; and a housing for accommodating the fan and having an opening corresponding to the air outlet of the scroll casing, wherein an air outlet duct is disposed on the side of the housing and communicated with the air outlet of the scroll casing, and a baffle is disposed inside the air outlet duct; wherein the air inlet has a circular edge, the circular edge has a first point, a second point and a third point, the first point is closer to the opening than the third point, the second point is between the first point and the third point along the circular edge, and the slope surface is connected to the top portion beside the second point of the circular edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A ventilation fan assembly, comprising:
- a fan comprising;
a base supporting a driving device, a scroll casing having an air inlet, an air outlet, a top portion, a bottom portion corresponding to the top portion, and a slope surface connecting the top portion and an edge of the air outlet, wherein the top portion and the bottom portion together define a channel height, a ratio of the channel height to a height of the air outlet ranges from 1.1 to 2, and an impeller disposed in the scroll casing, wherein the driving device drives the impeller to rotate; and a housing for accommodating the fan and having an opening corresponding to the air outlet of the scroll casing, wherein an air outlet duct is disposed on the side of the housing and communicated with the air outlet of the scroll casing, and a baffle is disposed inside the air outlet duct; wherein the scroll casing has a sidewall surrounding the air inlet, the slope surface has a slope edge along the sidewall from the top surface to the opening, and a height of the slope edge decreases from the top surface to the opening. - View Dependent Claims (16, 17)
- a fan comprising;
Specification