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Noise suppression structure for fan

A noise and fan technology, applied in the field of noise suppression structure, can solve problems such as poor noise reduction effect, and achieve the effect of improving noise reduction efficiency

Inactive Publication Date: 2019-11-01
SHANGHAI DE HUI SPECIFIC FAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a noise suppression structure for fans, which solves the problem of poor noise reduction effect in the related art

Method used

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  • Noise suppression structure for fan
  • Noise suppression structure for fan
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Embodiment Construction

[0025] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only the present invention. Some, but not all, embodiments of the 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 shall fall within the scope of protection of this embodiment.

[0027] It should be noted that the terms "first" and...

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Abstract

The invention discloses a noise suppression structure for a fan. The noise suppression structure for the fan comprises a volute, an impeller and a motor, wherein the volute is provided with an air inlet, the impeller is arranged inside the volute and coaxial with the air inlet, and the motor is arranged on the side, opposite to the air inlet, of the volute and is in transmission connection with the impeller; and the noise suppression structure further comprises a first noise reduction device and a second noise reduction device, the first noise reduction device is arranged on the side, connected with the motor, of the impeller and is arranged outside the motor in a sleeving mode, and the second noise reduction device is arranged at the air inlet. The first noise reduction device suppressesnoise generated by working of the motor and the impeller, the second noise reduction device suppresses noise generated by air intake of the fan, and noise reduction efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the field of fans, in particular to a noise suppression structure for fans. Background technique [0002] The fan is a general-purpose mechanical device with a large quantity and a wide range. It is widely used in chemical industry, petroleum, metallurgy, mining, machinery and other industrial sectors. The air generated by the fan during operation often becomes a source of disaster that affects workers and disturbs the quiet environment, seriously disturbing People's normal work and rest, even become a public nuisance. The rotation of the fan is related to the rotation of the impeller, especially in the case of high speed and low load, the noise is particularly prominent. [0003] Chinese patent (CN201720253149.X) discloses an auxiliary noise reduction device for a fan, which discloses that a fixed shunt ring and a movable shunt ring are installed inside the fan impeller, and the movable shunt ring can be driven by the driving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66
CPCF04D29/664F04D29/665
Inventor 沈余良
Owner SHANGHAI DE HUI SPECIFIC FAN
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