Smoke exhaust ventilator

A technology of range hood and fan, applied in the field of range hood, can solve the problem of high noise of range hood, and achieve the effects of eliminating vortex, reducing wind resistance and improving noise reduction efficiency.

Inactive Publication Date: 2016-12-07
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the turbulence noise of the range hood is directly generated by the centrifugal fan, it mainly comes from the air intake at the air inlet of the centrifugal fan. If the oil fume flow in the oil fume channel in front of the air inlet of the centrifugal fan is chaotic, it will increase the noise caused by turbulence. Conditions, resulting in louder noise from the range hood

Method used

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  • Smoke exhaust ventilator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , a range hood, comprising a smoke collection hood 1, a box 2 arranged above the smoke collection hood 1, a fan 3 is arranged in the box 2. An air inlet is provided on the fume collecting hood 1, so that the fan 3 in the box body 2 can suck the oil fume into the box body 2 through the air inlet and discharge it to the public flue.

[0025] A rectifying net 4 is arranged inside the box body 2, and the rectifying net 4 is horizontally arranged in the box body 2. The rectifying net 4 is provided with mesh holes 41. By setting the rectifying net 4, the airflow entering the fan 3 can be divided, To eliminate the large vortex in the airflow, so as to achieve the purpose of reducing noise. In this embodiment, the rectifying net is not a plane, but a three-dimensional structure with a concave-convex structure, so as to better adapt to the flow field of the oil fume flow, and at the same time make the contact area of ​​the oil fume flow larger when the air flow and...

Embodiment 2

[0029] The difference from the first embodiment above is that in this embodiment, the concavo-convex structure is that the rectifying net 4' has a plurality of wavy structures 44' arranged side by side in the left and right directions.

Embodiment 3

[0031] The difference from the second embodiment above is that in this embodiment, the mesh 41' is a long hole, and the long hole extends in the left and right directions to reduce wind resistance.

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PUM

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Abstract

The invention discloses a smoke exhaust ventilator. The smoke exhaust ventilator comprises a tank body internally provided with a draught fan. The smoke exhaust ventilator is characterized in that a rectifying net is horizontally installed in the tank body, the rectifying net is provided with net holes, and the rectifying net is of a concave-convex structure. The stereo rectifying net is installed in an airflow passage, so that airflow entering into the draught fan can be divided, large eddies among smoke flow are removed, and thus the purpose of reducing noises is achieved; and in addition, the flow field of the smoke flow can be better adapted, the contacted area is larger when the smoke flow passes, and when the airflow and sound waves pass through, energy can be consumed through friction, so that a better rectifying effect is achieved.

Description

technical field [0001] The invention relates to kitchen appliances, in particular to a range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Generally, range hoods include top-suction and side-suction types. Top-suction range hoods are neat, light, and take up less space. It has more and more widespread applications. The top-suction range hood usually includes a fume collection hood, a fan casing positioned on the fume collection hood, and a volute, an impeller and a motor for driving the impeller are installed in the fan casing. [0003] Commonly used top-suction range hoods, such as a range hood disclosed in Chinese Patent Application No. 201410704669.9, include a smoke collection hood with an air suction port, a wind cabinet arranged on the top of the smoke collection The fan with a volute inside, through the action of the fan, discharges the gas in the air cabinet and forms a negative pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20
CPCF24C15/20
Inventor 梁雪斐周佳杰刘逸王青山茅忠群诸永定刘戈
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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