Noise reducing device and range hood provided with same

Abstract

The invention discloses a noise reducing device. The noise reducing device comprises a first tubular wall, a second tubular wall and a third tubular wall which are sequentially arranged from outside to inside, wherein a first cavity is enclosed between the first tubular wall and the second tubular wall; a second cavity is formed in the third tubular wall; air flow for allowing air to flow is formed between the second tubular wall and the third tubular wall; a first through hole for enabling the first cavity to communicate with the air flue is formed in the second tubular wall; a second through hole for enabling the second cavity to communicate with the air flue is formed in the third tubular wall; when air flows in the air flue, the first cavity with the through hole and the second cavity with the through hole define a noise reducing system with a noise reducing function; based on a position relationship of the first cavity and the second cavity, very good noise reducing effect can be achieved when air pressure loss is not great; and moreover, the noise reducing structure is low in structure realizing difficulty, is not high in cost, and is easy for large-scale production.

Description

technical field [0001] The invention relates to the application field of household appliances, in particular to a noise reduction device and a range hood equipped with the noise reduction device. Background technique [0002] The range hood is a kitchen appliance that purifies the kitchen environment. The range hood is installed above the kitchen stove, which can quickly remove the waste burned by the stove and the harmful oil fume generated during the cooking process, so as to achieve the effect of purifying the air. . However, due to the cyclone generated when the airflow enters the range hood, coupled with the high-speed rotation of the impeller of the fan and the operation of the motor, the range hood will generate relatively large noise during use. There have been multiple range hoods equipped with noise reduction devices on the market, and the noise reduction range hoods in the prior art still have the following problems: [0003] One is that the range hoods in the p...

AI Technical Summary

Problems solved by technology

[0003] One is that the range hoods in the prior art mainly use sound-proof cotton for noise reduction, and absorb wind noise through the sound-proof cotton to block and absorb wind noise, so as to reduce the use noise. The sound insulation cotton will accumulate a lot of oil; the range hood needs to be cleaned regularly, the material of the sound insulation cotton makes it difficult to clean after the accumulated oil, and the sound insulation effect will be reduced after repeated cleaning, its recycling rate is not high, and it needs to be replaced frequently, which makes the user very inconvenient to use

[0004] Second, although the existing range hood technology also involves the use of Helm Hertz resonance for noise reduction, but for now, the noise reduction effect it achieves is not ideal, and many of them are carried out at the expense of wind pressure. noise reduction

Images