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Multi-wing centrifugal fan

A centrifugal fan and distance technology, which is applied in the direction of electromechanical devices, mechanical equipment, machines/engines, etc., can solve the problems of inconspicuous effect and diversion of unfume gas, so as to improve the suction efficiency, improve the flow field, and achieve good suction and discharge effects Effect

Active Publication Date: 2017-11-10
NINGBO FOTILE KITCHEN WARE CO LTD
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Problems solved by technology

In this way, when the air flow passes through the air inlet, the rectification effect of the rectification net is used to avoid turbulent flow when the flue gas enters the air inlet; obvious
[0004] Another example is CN201110432232.0 which discloses a "Multi-blade Centrifugal Fan with Multifunctional Flow Guidance Device", in which guide blades and flow guides are installed in the inner cavity of the impeller, which can affect the air pressure, air volume and other performances of the range hood. It has been improved, but because the patented guide vanes and deflectors only cover very little space in the inner cavity of the impeller, they do not effectively guide all the soot gas in the inner cavity of the impeller

Method used

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  • Multi-wing centrifugal fan
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Examples

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Embodiment 2

[0037] Such as Figure 5 to Figure 7 As shown, the guide vane 3 in this embodiment is a propeller structure, the root width of the helicoid is 5mm, and the maximum width of the end is 30mm.

[0038] All the other contents are the same as in Example 1.

[0039] The guide vanes with multiple helical surface structures can make the negative pressure at the air inlet of the volute form a 360° rotation area, resulting in the formation of a tornado effect; when sucking and exhausting oil fume, it can make the small particles of oil fume rotate and collide to aggregate into large particles, and then be centrifuged The centrifugal force generated by the fan impeller is thrown onto the inner ring wall of the volute, which effectively improves the oil fume separation effect. At the same time, when the oily fumes pass through the guide vanes, they must bypass the swirl blades and enter the impeller blades. During this process, the oily fumes will contact with the swirl blades to filter ...

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Abstract

The invention relates to a multi-wing centrifugal fan. The multi-wing centrifugal fan comprises a volute (1), an impeller (2) arranged in the volute (1), and a first motor (4) arranged in the volute (1) for driving the impeller (2) to rotate; and the volute (1) is provided with an intake port (11) and an exhaust port (12). The multi-wing centrifugal fan is characterized in that at least two guide blades (3) are arranged on the inner side of the impeller (2) in the volute (1) at intervals; the guide blades (3) are connected to a rotating shaft (6); an output shaft of a second motor (7) is in driving connection with the rotating shaft (6); the second motor (7) is connected to a bracket (5); the bracket (5) is connected to the volute (1); and the guide blades are spirally arranged corresponding to the center of the intake port (11).

Description

technical field [0001] The invention relates to a centrifugal fan, in particular to a multi-blade centrifugal fan. Background technique [0002] Most of the fans used in range hoods are multi-blade centrifugal fans. The air flow field at the impeller inlet of the centrifugal fan will produce turbulent flow, swirl and other turbulent air fields, which will reduce the air volume, wind pressure and total pressure efficiency of the fan. [0003] CN201020287875.1 discloses a "range hood fan unit with rectifying function", which is fixedly covered with a rectifying net at the air inlet of the fan volute. In this way, when the air flow passes through the air inlet, the rectification effect of the rectification net is used to avoid turbulent flow when the flue gas enters the air inlet; obvious. [0004] Another example is CN201110432232.0 which discloses a "Multi-blade Centrifugal Fan with Multifunctional Flow Guidance Device", in which guide blades and flow guides are installed i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/06F04D29/66F04D29/28F04D29/30F04D29/70H02K5/00
CPCH02K5/00F04D25/0606F04D29/281F04D29/30F04D29/666F04D29/703
Inventor 唐兴旺施旭娜茅忠群诸永定李斌
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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