Noise reduction volute tongue, volute case, blower fan and hood
A technology of noise reduction and volute tongue, applied in the field of volute, fan and hood, noise reduction volute and tongue, can solve the problems of inability to reduce discrete noise, insignificant noise reduction effect, insufficient volume and effective depth, etc. Depth, increase the noise reduction frequency band, improve the effect of noise reduction
Active Publication Date: 2021-05-04
FOSHAN SHUNDE MIDEA WASHING APPLIANCES MFG CO LTD
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Problems solved by technology
However, the existing sound-absorbing resonant cavity is a single cavity, and the volume and effective depth are not enough. It can only reduce noise in a narrow band range, and cannot reduce discrete noise near discrete noise sources, and the noise reduction effect is not obvious.
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and...
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The application discloses a noise reduction volute tongue, a volute case, a blower fan and a hood. The noise-reducing volute tongue includes: a housing, which includes a noise-reducing cavity and a noise-reducing hole; The noise reduction cavity is divided into a front cavity and a rear cavity; wherein, the front cavity communicates with the noise reduction hole, a sound inlet hole is provided on the partition of the cavity, and the front cavity is connected to the noise reduction hole. The rear cavity communicates with the sound inlet hole. The noise-reducing volute tongue of the present application has larger noise-reducing cavity volume and local cavity depth, and can improve the noise-reducing effect and the noise-reducing frequency band.
Description
technical field [0001] The present application relates to the field of fans, in particular to a noise-reducing volute tongue, a volute case, a fan and a hood. Background technique [0002] With the improvement of user needs, for range hoods, it is necessary not only to pay attention to core indicators such as air volume and static pressure, but also to pay attention to the noise and sound quality during use, so as to improve the product use experience and human comfort, so as to meet the needs of users. Generally speaking, the main noise source of the range hood is the aerodynamic noise generated by the fan system, especially the discrete noise generated by the interaction between the impeller exit wake and the volute tongue. [0003] The existing scheme is to set a perforated plate and a sound-absorbing resonant cavity connected with the perforated plate on the inner wall of the volute tongue, and use the sound-absorbing principle of the perforated plate to reduce noise. H...
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IPC IPC(8): F04D29/42F04D29/66F24C15/20
CPCF04D29/4226F04D29/4233F04D29/663F24C15/20
Inventor 刘张羽边乐超刘华春李伟唐伟鹏
Owner FOSHAN SHUNDE MIDEA WASHING APPLIANCES MFG CO LTD