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Fan and Duct Machine

A fan and air duct technology, which is applied in the field of fans and duct machines, can solve problems such as fan and volute noise, and achieve the effects of solving complex structures, reducing transmission, and improving the noise environment

Active Publication Date: 2021-11-02
QINGDAO HAIER SMART TECH R & D CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a fan and a duct machine, aiming to solve the noise problem when the existing fan is used in conjunction with the volute

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the first aspect of the embodiments of the present invention, another fan is provided, such as Figure 2-3 As shown, it includes the impeller between the volute 1 and the two air inlets 11 arranged on both sides of the volute 1, and also includes one or more noise reducers 2, and each noise reducer 2 is arranged at the inlet of the volute 1. In the air duct at the tuyere 11; each noise reducer 2 includes an annular casing 21 that is closed and adapted to the radial cross-sectional shape of the volute 1, and a plurality of inner peripheral walls along the annular casing 21 are arranged in the annular casing 21. The muffler cavities 22 arranged in sequence in the circumferential direction and separated from each other, each muffler cavity 22 has a through hole 27 communicating with the air inlet 11 .

[0037] In one embodiment of the present invention, the radial cross-sectional shape of the casing of the volute 1 is a spiral shape, and here, the radial direc...

Embodiment 2

[0064] The first aspect of the embodiment of the present invention provides another fan, such as Figure 5-7 As shown, it includes the impeller between the volute 1 and the two air inlets 11 arranged on both sides of the volute 1, and also includes one or more noise reducers 2, and each noise reducer 2 is arranged at the inlet of the volute 1. In the air duct at the tuyere 11; each noise reducer 2 includes an annular casing 21 that is closed and adapted to the radial cross-sectional shape of the volute 1, and a plurality of inner peripheral walls along the annular casing 21 are arranged in the annular casing 21. Circumferentially arranged in sequence, mutually isolated mufflers 22, each muffler 22 has a first through hole 23 communicated with the air inlet 11; each muffler 22 is away from the first through one or more edges The diaphragm 25 arranged at intervals in the direction of the through hole 23 is divided into two or more sound-absorbing sub-cavities 221; The opening p...

Embodiment 3

[0092] In the third embodiment, the present invention also provides a fan, including a volute 1 and an impeller between two air inlets 11 arranged on both sides of the volute 1, and also includes one or more noise reducers 2, more A noise reducer 2 includes at least one noise reducer 2 provided in the first embodiment and at least one noise reducer 2 provided in the second embodiment, and a plurality of noise reducers 2 are sequentially stacked on the axial direction of the volute 1 In the air duct.

[0093] In this way, the two types of noise reducers 2 disclosed in the above two embodiments can be used to jointly achieve the purpose of reducing fan noise, and the number and stacking method of the two types of noise reducers 2 can be adjusted according to actual noise reduction needs.

[0094] According to the second aspect of the third embodiment of the present invention, there is also provided an air duct machine, including one or more of the above-mentioned fans.

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Abstract

The invention discloses a fan and an air duct machine, belonging to the technical field of fans. The fan includes a volute and an impeller arranged between two air inlets on both sides of the volute, and also includes one or more noise reducers, and one or more noise reducers are arranged in the air duct at the air inlet of the volute; Each noise reducer includes an annular casing that is closed and adapted to the radial cross-sectional shape of the volute, and a plurality of sound-absorbing cavities that are arranged in sequence along the circumferential direction of the inner peripheral wall of the annular casing and are separated from each other are arranged in the annular casing , each muffler cavity has a through hole communicating with the air inlet. The embodiment of the present invention solves the noise problem when the fan is in use. The structure of the noise reduction component is complex and the noise reduction effect is relatively poor. The fan can reduce the noise of the air in the air duct of the volute through the noise reduction chamber of the noise reducer. Each sound-absorbing cavity adopts a structural design similar to a "Helmholtz resonator (Helmholtz)", which can effectively reduce the transmission of noise at the volute air duct of the fan.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a fan and an air duct machine. Background technique [0002] At present, the indoor unit of the duct machine adopts a centrifugal fan, which mainly produces aerodynamic noise such as rotating noise and eddy current noise during its operation. The rotating noise is caused by the asymmetric structure around the impeller blade and the circumferential unevenness formed by the blade rotation. The noise generated by the interaction of the flow field, the vortex noise is mainly due to the turbulent boundary layer generated when the air flow passes through the blade and the vortex and the vortex split off, which causes the vortex noise caused by the pressure pulsation on the blade. Regardless of the type of noise mentioned above, it will hinder people's communication and language exchanges in production, affect the organization and management of production, and seriously damage people's phy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/66
CPCF04D29/4226F04D29/665
Inventor 赵海霞项红荧范强闫茂松孙兴朋
Owner QINGDAO HAIER SMART TECH R & D CO LTD
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