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Noise reduction volute tongue, volute case, blower fan and hood

A technology of noise reduction and volute tongue, which is applied in the field of volute, fan and hood, and noise reduction volute tongue. It can solve the problems of insufficient effective cavity depth, inability to reduce discrete noise, and ineffective noise reduction, etc. Noise effect, improved noise reduction effect, increased effective depth effect

Active Publication Date: 2021-07-09
FOSHAN SHUNDE MIDEA WASHING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing scheme is to add a sound-absorbing resonant cavity on the inner wall of the volute tongue, and use the sound-absorbing principle of the perforated plate to reduce noise. Because the cavity is limited by the installation position, the effective depth of the cavity is generally not enough, and it can only be used for certain A narrow-band range plays a noise reduction role, and the discrete noise cannot be reduced near the discrete noise source, and the noise reduction effect is not obvious

Method used

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  • Noise reduction volute tongue, volute case, blower fan and hood
  • Noise reduction volute tongue, volute case, blower fan and hood
  • Noise reduction volute tongue, volute case, blower fan and hood

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Embodiment Construction

[0024] 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.

[0025] 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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Abstract

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, the housing is provided with a noise-reducing cavity, and the housing is provided with a noise-reducing hole communicating with the noise-reducing cavity; a baffle, and the baffle is arranged on the In the noise reduction chamber, the partition plate bends and extends in the noise reduction chamber to divide the noise reduction chamber into bent and connected noise reduction channels. The noise-reducing volute tongue of the present application has a greater depth of the noise-reducing cavity, which 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] The volute tongues used for fans such as range hoods and air conditioners are mainly used to block the airflow and prevent the airflow driven by the fan impeller from idling in the fan volute and not going out. The snail tongue can be divided into sharp tongue, deep tongue, short tongue, flat tongue and so on. For the traditional straight volute tongue, the deeper the volute tongue is, the smaller the gap between it and the impeller is, and the efficiency of blocking the airflow is improved, but the noise is also increased. With the improvement of user needs, in order to meet the human comfort requirements of the fan, the operating noise of the fan should be as low as possible on the premise that the range hood meets the core indicators such as air volume and static pressure. Generally s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/66F24C15/20
CPCF04D29/4226F04D29/4233F04D29/663F24C15/20
Inventor 刘华春边乐超刘张羽李伟
Owner FOSHAN SHUNDE MIDEA WASHING APPLIANCES MFG CO LTD