Noise-reducing range hood

Abstract

The invention provides a noise-reducing range hood, which comprises a range hood body and a smoke collecting hood, wherein the range hood body is internally provided with a smoke inlet and a flue, and the smoke collecting hood is internally provided with a noise-reducing fan communicated with the smoke inlet and the flue; the noise-reducing fan comprises a casing, and the casing internally comprises an axial flow fan; the casing is provided with an air inlet at one side and an air outlet at the other side, and the outside of the air inlet is surrounded by a noise-reducing ring; the noise-reducing ring is made of a sound insulation material, and the air outlet is a variable diameter structure; the variable diameter air outlet is made of two layers of steel plates, and a steel plate gap is included between the two layers of steel plates; the steel plate gap contains a sound insulation material. The noise-reducing range hood provided by the invention has the beneficial effects that a segment of annular noise-reducing structure is added at the air inlet, a deflector plate structure is improved at the air outlet, and a lining sound-absorbing cotton is added at the same time, so that the formation of noise can be effectively controlled through various ways, and thus the noise of the range hood is greatly reduced, the super silent work is realized, and the comfort degree in use is improved.

Description

technical field [0001] The invention relates to a range hood, in particular to a noise reduction range hood. Background technique [0002] With the improvement of the quality of life, users pay more and more attention to the operating noise of range hoods when purchasing range hoods. At the same time, domestic control standards for the operation noise of range hoods have also been improved. However, the high-volume range hoods currently on the market generally have the problem of high noise. In order to reduce the noise generated during the operation of the range hood, manufacturers usually use the method of filling porous sound-absorbing materials, but the porous sound-absorbing materials are not good for medium and high frequencies. The sound effect is good, but the low-frequency noise reduction effect is poor. For example, in the prior art, there is a design to reduce the noise of the range hood by wrapping the smoke pipe with sound-absorbing material, but this design ca...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a noise-reducing range hood, which solves the problem of large aerodynamic and mechanical vibration noise of the existing range hood

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