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A silent range hood

A range hood, mute technology, applied in the field of range hoods, can solve problems such as loud noise, and achieve the effect of smooth airflow and accelerated airflow rise

Inactive Publication Date: 2016-08-24
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the formation of two oil fume channels, the oil fume enters the fan from the front and rear air inlets, and the noise of the range hood mainly comes from the inside of the centrifugal fan, so the centrifugal fan will go out through the two air inlets during operation. It radiates a lot of noise and needs further improvement

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0034] see Figure 1-Figure 3 , a silent range hood, comprising a casing 1 and a smoke collection hood 2, the casing 1 includes a front cover 11 and a rear cover 12 of the casing, a volute 3 is arranged inside the casing 1, and the volute 3 An impeller 4 and a motor 5 for driving the impeller 4 are arranged inside.

[0035] The volute 3 has a front air inlet 31 and a rear air inlet 32. The casing front cover 11 of the casing 1 is opposite to the front air inlet 31, and the inner side of the casing front cover 11 is fixed with a sound-absorbing guide cover 13 facing the front air inlet 31. see Figure 4-Figure 5 , the sound-absorbing guide cover 13 includes a rear panel 131 opposite to the front air inlet 31 arranged obliquely, and the distance between it and the front cover 11 of the casing gradually decreases from top to bottom, and the two sides of the rear panel 131 and the front cover of the casing End faces 132 are respectively arranged between the plates 11, the width ...

Embodiment 2

[0044] see Figure 10-Figure 12 , in this embodiment, the difference from Embodiment 1 is that the wind deflector 6 is only provided with a second microhole 64 on the rear plane plate 62, and only the inner wall of the rear plane plate 62 is provided with a second sound-absorbing The shape of the cotton 65 and the second sound-absorbing cotton 65 is consistent with the shape of the cavity formed from the inner wall of the rear plane panel 62 to the top of the arc panel 63 .

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Abstract

The invention discloses a silent range hood comprising a machine enclosure and an exhaust fume collecting hood with an air inlet, wherein a spiral casing is arranged in the machine enclosure and is provided with a front air inlet and a back air inlet. The silent range hood is characterized in that a sound absorption flow guide hood is arranged on a front cover plate of the machine enclosure and is just opposite to the front air inlet of the spiral casing, a closed cavity is formed between the sound absorption flow guide hood and the front cover plate of the machine enclosure, a plurality of first micro-pores communicated with the closed cavity are formed in a back panel, opposite to the front air inlet, of the sound absorption flow guide hood, and the closed cavity is filled with first sound absorbing cotton. According to the invention, the sound absorption flow guide hood is just opposite to the front air inlet of the spiral casing and is provided with the micro-pores and the closed cavity is filled with the sound absorbing cotton, so that most of low-frequency, medium-frequency and high-frequency noise radiated outwards from the front air inlet can be absorbed; by reasonable selections of the aperture and the center distance of the micro-pores and the filling area of the sound absorbing cotton, the sound absorbing effect can be further strengthened.

Description

technical field [0001] The invention relates to a range hood, in particular to a silent 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] The air inlet of this range hood is located on the side of the volute, that is, one-sided air intake, the air intake area is small, and the amount of oil fume exhaust is not very satisfactory. For this reason, some range hoods with double-side air inlets have also been disclosed at present, such as the Chinese patent application with the application number of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C15/20
Inventor 董一龙梁之博任树栋胡承杰李斌茅忠群诸永定
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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