CN216867055U

CN216867055U - Noise suppression fan

Info

Publication number: CN216867055U
Application number: CN202220144042.2U
Authority: CN
Inventors: 陈冠宏; 许志聪; 吴信贤; 潘锦辉
Original assignee: Yen Sun Technology Corp
Current assignee: Yen Sun Technology Corp
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-07-01
Anticipated expiration: 2032-01-19

Abstract

A noise suppression fan includes an operation unit, and a function unit surrounding the operation unit. The operation unit comprises a fan frame surrounding an installation space and a fan wheel installed in the installation space. The fan wheel is defined to lead in and output airflow along the axial direction and a plurality of radial directions perpendicular to the axial direction. The functional unit surrounds the periphery of the operation unit along the radial direction, and comprises a surrounding plate which is provided with a plurality of through holes penetrating along the radial direction and surrounds the outer side of the fan frame, and a pore module which is arranged on the outer side of the surrounding plate, is separated from the surrounding plate to define an annular cavity and is provided with a plurality of through grooves penetrating along the axial direction. The air flow can reduce wind shear when passing through the through groove, and the noise sound wave can be counteracted when entering the annular cavity through the through hole.

Description

Noise suppression fan

Technical Field

The present invention relates to a fan, and more particularly, to a noise suppression fan.

Background

When the fan is operated, in the process of introducing airflow from the outside until the airflow is converged by the rotating fan blades and then is output in a specific direction, the airflow is in contact with each component of the fan certainly, so that the components generate noise due to basic vibration, wind shear, resonance and other factors. The noise is sound waves with different frequencies, and particularly when harmonics are generated among the sound waves with different frequencies, if the harmonics with relative high frequencies are mutually superposed with fundamental frequencies of the harmonics, louder noise is formed. Therefore, how to suppress the noise caused by the harmonic frequency becomes a problem to be solved by those skilled in the art related to the fan.

Disclosure of Invention

The utility model aims to provide a noise suppression fan which can generate a targeted suppression effect according to harmonic noise of high frequency.

The utility model relates to a noise suppression fan, which comprises an operation unit and a functional unit surrounding the operation unit.

The operation unit comprises a fan frame surrounding an installation space and a fan wheel installed in the installation space. The fan wheel is defined to lead in and output airflow along the axial direction, and a plurality of radial directions which are perpendicular to the axial direction and face towards the outer side.

The functional unit surrounds the periphery of the operation unit along the radial direction, and comprises a surrounding plate which is provided with a plurality of through holes which are in a penetrating shape along the radial direction and surrounds the outer side of the fan frame, and a pore module which is arranged on the outer side of the surrounding plate, defines an annular cavity with the surrounding plate at intervals and is provided with a plurality of through grooves which are in a penetrating shape along the axial direction. The through grooves surround the periphery of the annular cavity in multiple layers.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

Preferably, the noise suppressing fan further comprises a plurality of pipe members disposed adjacent to each other and defining the through slots respectively.

Preferably, the noise suppressing fan further comprises a peripheral plate surrounding the periphery of the pipe.

Preferably, the surrounding plate of the functional unit has two end edges located at opposite ends along the axial direction, and the aperture module has a connecting portion connected to one of the end edges of the surrounding plate, so that the other end edge of the surrounding plate and the aperture module define a slot communicating with the annular cavity at an interval.

The utility model has the beneficial effects that: when the running unit runs, a part of the airflow guided in along the axial direction due to the rotation of the fan wheel can firstly pass through the through groove of the pore module, so that the wind shear caused by the airflow squeezed into the space in the surrounding plate from a relatively large range can be reduced, meanwhile, the vibration can be effectively inhibited by matching with the multilayer structure of the through groove of the pore module, partial vibration noise can be reduced, the airflow entering the inside can enter the annular cavity through the through hole along the radial direction and then contacts the side wall of the pore module to be reflected, the noise with a relatively wide frequency band can be adjusted as long as the parameters of the form, the volume, the range and the like of the annular cavity are properly adjusted, thereby the noise with a specific narrow frequency can be inhibited, the white noise with relatively gentle frequency distribution is generated to generate pulse wave response, the effect of reducing the specific frequency is achieved, and the effect is also in the harmonic frequency thereof, therefore, the suppression effect can be generated in response to the harmonic noise of the specific high frequency.

Drawings

FIG. 1 is an exploded perspective view illustrating one embodiment of a noise suppression fan according to the present invention;

FIG. 2 is a partial cross-sectional view illustrating a functional unit of the embodiment;

FIG. 3 is a schematic view illustrating the case where the airflow is guided by a running unit of the embodiment to interact with the function unit; and

fig. 4 is a graph illustrating the noise suppression effect of the embodiment with reference to fig. 3.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1, an embodiment of the noise suppressing fan of the present invention includes an operation unit 1 and a function unit 2 surrounding the operation unit 1. The operation unit 1 includes a fan frame 11 surrounding an installation space 110, and a fan wheel 12 installed in the installation space 110. Referring to fig. 1 and fig. 2, when the fan wheel 12 rotates around its own axis, it is defined that the air flow is introduced and outputted along an axial direction Z, and then a plurality of radial directions R perpendicular to the axial direction Z and facing outward are defined, where the radial directions R are outward directions away from the own axis of the fan wheel 12.

Referring to fig. 2 and 3, the function unit 2 surrounds the operation unit 1 along the radial direction R, and includes a surrounding plate 21 having a plurality of through holes 210 penetrating along the radial direction R and surrounding the outer side of the fan frame 11, and an aperture module 22 disposed on the outer side of the surrounding plate 21 and defining an annular cavity 212 with the surrounding plate 21 at an interval, and having a plurality of through slots 220 penetrating along the axial direction Z. The surrounding plate 21 defines an inner space 200 substantially for installing the operation unit 1, and two openings 201 are respectively formed at two opposite sides of the inner space 200 along the axial direction Z. The surrounding plate 21 has two end edges 211 respectively located at two opposite ends along the axial direction Z and respectively surrounding the opening 201. When the operation unit 1 operates, the airflow is guided to enter the inner space 200 through one of the openings 201 as shown by arrows in fig. 3, and then to be output outward through the other opening 201.

The aperture module 22 has a plurality of tubes 221, a peripheral plate 222 surrounding the tubes 221, and a connecting portion 223 connected to one of the end edges 211 of the surrounding plate 21, wherein the tubes 221 are adjacent to each other and surround the annular cavity 212 in multiple layers to define the through slots 220. In addition, the other end edge 211 of the surrounding plate 21, spaced from the aperture module 22, defines a slot 219 communicating with the annular cavity 212. In the embodiment, the cross section of each tube 221 is circular, and other shapes such as diamond, square, rectangle, etc. may be adopted in practical implementation, and the cross section is not limited to circular. In addition, multiple layers of long slots penetrating in the same direction as the through slots 220 are formed among the pipe elements 221 surrounding the periphery of the annular cavity 212 at intervals, so that the pipe elements 221 can form an integral structure with more densely distributed slots by matching with the through slots 220.

When the air flow flows from the outside toward the inside of the internal space 200 due to the operation of the fan wheel 12, the air flow tends to flow in from a larger range with respect to the opening 201 of the internal space 200, and thus is introduced in a state similar to a sphere as shown by the imaginary line in fig. 3. In the process of the air flow entering the inner space 200, at least a part of the air flow outside the range of the opening 201 of the inner space 200 can enter the through groove 220 through the through groove 220 defined by the pipe 221, thereby avoiding the air flow from generating flow similar to "extruding from the periphery into the inner space 200", greatly reducing wind shear and vibration of components, and achieving the purpose of reducing noise; meanwhile, the multi-layer structure presented by the through groove 220 of the pore module 22 can effectively inhibit vibration, and further reduce part of noise generated by vibration. Then, when the airflow enters the inner space 200 and is guided by the rotating fan wheel 12, a portion of the airflow enters the annular cavity 212 through the through hole 210 along the radial direction R away from the axis, and then contacts the sidewall of the pipe 221 and is reflected back to the inner space 200, so long as parameters such as the form, volume, range, and the like of the annular cavity 212 are properly adjusted, noise of a relatively wide frequency band can be adjusted accordingly, thereby suppressing noise of a specific narrow frequency band, and generating a pulse wave response by generating white noise with relatively gentle frequency distribution, achieving an effect of reducing the specific frequency and the effect is also harmonic to the specific frequency.

As shown in fig. 4, the upper part is a graph of the sound wave spectrum generated when the fan wheel 12 (see fig. 1) is operated without using the present embodiment, and this graph is used as a control group, and the lower part is an experimental group using the present embodiment. For example, the fundamental frequency is 760 to 790(Hz), and the harmonic frequency of the relatively high frequency falls between 1520 to 1580(Hz) and 2280 to 2370(Hz) …. Accordingly, it is apparent from comparison between the experimental group and the control group actually measured in fig. 4 that the peak value representing the fundamental frequency and the peak values of the harmonic frequencies of two higher frequencies are reduced, and it is seen that the noise of the harmonic frequency of the high frequency is actually reduced after the present embodiment is used.

Claims

1. A noise suppression fan comprises an operation unit, wherein the operation unit comprises a fan frame surrounding an installation space, a fan wheel installed in the installation space, a plurality of radial directions, and a plurality of fan blades, wherein the fan wheel is used for defining the leading-in and leading-out airflow of the fan wheel along the axial direction, and the radial directions are perpendicular to the axial direction and face towards the outer side; the method is characterized in that: the noise suppression fan further includes:

the functional unit surrounds the periphery of the operation unit along the radial direction, and comprises a surrounding plate which is provided with a plurality of through holes which are in a penetrating shape along the radial direction and surrounds the outer side of the fan frame, and a pore module which is arranged on the outer side of the surrounding plate, defines an annular cavity with the surrounding plate at intervals and is provided with a plurality of through grooves which are in a penetrating shape along the axial direction, wherein the through grooves surround the periphery of the annular cavity in a multi-layer mode.

2. The noise suppressing fan as recited in claim 1, wherein: the pore module has a plurality of pipe pieces arranged next to each other and respectively defining the through slots.

3. The noise suppressing fan as recited in claim 2, wherein: the aperture module also has a peripheral plate surrounding the periphery of the tube.

4. The noise suppressing fan as recited in claim 3, wherein: the surrounding plate of the function unit is provided with two end edges which are positioned at two opposite ends along the axial direction, and the pore module is provided with a connecting part which is connected with one end edge of the surrounding plate, so that the other end edge of the surrounding plate and the pore module define a slot which is communicated with the annular cavity at intervals.