CN217233856U

CN217233856U - Noise reduction structure for fan frame

Info

Publication number: CN217233856U
Application number: CN202221038450.6U
Authority: CN
Inventors: 赖华; 谈泽华
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-08-19
Anticipated expiration: 2032-04-27

Abstract

The utility model relates to a fan frame amortization structure, have a top and a bottom including a framework, and the department has an air current channel in the middle of this framework and link up to this bottom from this top, this air current channel forms an air intake and an air outlet in this top and this bottom respectively, and be equipped with a amortization district between this air current channel of at least a region department of this framework and a framework outer fringe of this framework, it is located between this top and this bottom and this air current channel does not communicate to be equipped with at least one amortization unit in this amortization district, this at least one amortization unit has a cavity and is not link up this top and this bottom by closed between this top and this bottom, borrow this isolated air current noise and absorb this framework vibration and noise.

Description

Noise reduction structure for fan frame

Technical Field

The utility model relates to a fan frame especially relates to a fan frame amortization structure.

Background

With the continuous progress of technology, the sizes of integrated circuits and electronic components are becoming more miniaturized, so that the integrated circuits and electronic components can be configured with higher density, thereby generating strong computing power and functionality, but good heat dissipation is required to maintain normal operating temperature, and a common heat dissipation fan drives airflow through a rotating fan blade to achieve good air cooling effect. The general heat dissipation fan usually generates unpleasant noise during operation, and the noise is mostly generated because the blades rotate to drive airflow into the flow channel, so that the whole fan frame generates vibration and impact sound to generate broadband noise, which is a problem to be overcome in the technical field of heat dissipation fans.

Therefore, how to solve the above problems and disadvantages is a direction in which the present inventors and related manufacturers in the industry desire to research and improve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can absorb a framework vibration and reduce the fan frame amortization structure of broadband area noise that vibration and air current striking produced.

In order to achieve the above object, the utility model provides a fan frame amortization structure, a serial communication port, include:

the air flow channel penetrates from the top to the bottom, the air flow channel forms an air inlet and an air outlet at the top and the bottom respectively, a silencing area is arranged between the air flow channel at least one area of the frame and the outer edge of the frame, at least one silencing unit is arranged on the silencing area, is positioned between the top and the bottom and is not communicated with the air flow channel, and is provided with a cavity which is sealed between the top and the bottom and does not penetrate through the top and the bottom.

The fan frame amortization structure, wherein: the frame body is provided with a plurality of corner areas which are respectively positioned at four corners of the frame body, and the cavity of the at least one silencing unit is arranged in the silencing area of at least one or all corner areas.

The fan frame amortization structure, wherein: the silencing unit is a hole or a groove.

The fan frame amortization structure, wherein: the frame body comprises an upper body and a lower body which are combined with each other, the upper body and the lower body are respectively provided with an opposite side corresponding to each other, the cavity of the at least one silencing unit is provided with an opening, the opening is arranged on the opposite side or one of the opposite sides of the upper body and the lower body, and the opening is closed by the opposite side.

The fan frame amortization structure, wherein: the cross section of the silencing unit is square, round, triangular, arc, oval, long strip or irregular.

The fan frame amortization structure, wherein: the at least one silencing unit is arranged in the silencing area in a single row or multiple rows.

Borrow by the utility model discloses this amortization unit's cavity is sealed between the top of this framework and this bottom in, with the effect of effective isolation noise and effective absorption (reduction) this framework vibration and the produced broadband noise of vibration reduction.

Drawings

Fig. 1 is a schematic exploded perspective view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a top view of the muffler units of the upper and lower bodies according to another embodiment of the present invention.

Fig. 4 is a frequency spectrum comparison diagram of broadband noise of the fan according to the present invention.

The reference numbers illustrate: a fan frame noise reduction structure-1; a frame body-11; -112, an upper body; a top side-1121; a bottom side-1122; upper channel-1124; a lower body-113; a top side-1131; a bottom side-1132; lower channel-1134; top-114; a bottom-115; a sound deadening zone-116; a sound deadening unit-117; cavity-1171; opening-1172; frame outer-118; an airflow channel-12; channel inner wall-121; channel outer rim-122; an air inlet-13; an air outlet-14; a shaft seat-15; corner area-16; screw hole-161; a fan-2; a stator group-21; a fan wheel-22; a leaf-221; a support portion-23; the utility model is curve-31; conventional curve-32.

Detailed Description

The above objects, together with the structural and functional features thereof, will be best understood from the following description of the preferred embodiment when read in connection with the accompanying drawings.

The utility model provides a fan frame amortization structure 1, please refer to fig. 1, fig. 2, this fan frame amortization structure 1 includes a framework 11, this framework 11 can be for integrated into one piece or combine with many formulas, explain with many formulas combination in this embodiment, this framework 11 contains an upper part of the body 112 that is the rectangle and a lower part of the body 113 that is the rectangle, this upper part of the body 112 and this lower part of the body 113 respectively have a

top side

1121, 1131 and a

bottom side

1122, 1132, the bottom side 1122 of this upper part of the body 112 concatenates with the top side 1131 of this lower part of the body 113 and combines to constitute framework 11 (like axial fan frame). And the top side 1121 of the upper body 112 and the bottom side 1132 of the lower body 113 are a top 114 and a bottom 115 of the frame 11, respectively.

The upper body 112 and the lower body 113 have an upper channel 1124 and a lower channel 1134 respectively at the middle thereof, which run through from the

top side

1121, 1131 to the

bottom side

1122, 1132 respectively, and the upper channel 1124 of the upper body 112 and the lower channel 1134 of the lower body 113 are connected in series and communicated to form an air flow channel 12 running through from the top 114 to the bottom 115 of the frame 11. The airflow channel 12 forms an air inlet 13 and an air outlet 14 at the top 114 and the bottom 115 of the frame 11 respectively to communicate with the airflow channel 12, and the airflow channel 12 has a channel inner wall 121 defining a channel outer edge 122.

A shaft seat 15 is disposed near the center of the air outlet 14, and the shaft seat 15 is connected to the inner wall 121 of the lower channel 1134 of the airflow channel 12 via a plurality of supporting portions 23 (such as ribs or vanes). A corner region 16 is formed at four corners of the upper body 112 and the lower body 113 (i.e., the frame 11), and a screw hole 161 is formed at each corner region 16 of the upper body 112 and the lower body 113 from the

top sides

1121, 1131 to the bottom sides 1122, 1132 (i.e., the top 114 of the frame 11 passes through to the bottom 115). In another alternative embodiment the frame 11 is a single fan frame.

Referring to fig. 1 and 2, a sound-deadening zone 116 is disposed on the frame 11 and/or at least one region (corner) of the frame 11 between the channel outer edge 122 of the airflow channel 12 and a frame outer edge 118 of the frame, and may be located at the corner region 16 between the screw hole 161 and the channel outer edge 122, in this embodiment, the sound-deadening zone 116 is disposed at each of the four corner regions 16 of the upper body 112 and the lower body 113 (i.e., the frame 11). But not limited thereto, in another embodiment, the sound-deadening regions 116 are provided on one or more corner regions 16 of the upper body 112 and the lower body 113, respectively.

In addition, at least one silencing unit 117 is disposed on the silencing region 116 of each corner region 16 of the upper body 112 and the lower body 113 between the

top sides

1121, 1131 and the

bottom sides

1122, 1132, and the silencing units 117 of the upper body 112 and the lower body 113 are shown as a plurality of circular holes in this embodiment. In practice, referring to fig. 3, which is a top view of a lateral cross section of another embodiment of the sound-deadening unit 117 of the upper body 112 and the lower body 113, the sound-deadening unit 117 may be a hole (or a groove) with a square shape, a triangular shape, an arc shape, an oval shape, a long strip shape, an irregular shape, or the like.

In detail, the muffling units 117 of the upper body 112 and the lower body 113 are recessed in four corner regions 16 of the bottom 1122 of the upper body 112 and the top 1131 of the lower body 113, and are arranged in a plurality of rows from the channel outer edge 122 of the airflow channel 12 to the frame outer edge 118 of the frame 11. The muffler units 117 of the upper body 112 and the lower body 113 are each formed by a plurality of muffler units 117, the muffler units 117 are spaced along the outer edge 122 of the airflow channel 12, and are separated (blocked) from the upper channel 1124 and the lower channel 1134 by the inner walls 121 of the upper and

lower bodies

112, 113, respectively, so that each muffler unit 117 of the upper body 112 and the lower body 113 does not communicate with the airflow channel 12.

Furthermore, each silencing unit 117 of the upper body 112 and the lower body 113 has a cavity 1171 sealed between the top 114 and the bottom 115 of the frame 11 and not penetrating through the top 114 and the bottom 115, so that the cavity 1171 of the upper body 112 and the lower body 113 is not communicated with the outside, and the sealed cavities 1171 of the upper body 112 and the lower body 113 are used to absorb the vibration of the frame 11 and the noise generated by the vibration thereof.

Referring back to fig. 2, the cavity 1171 of each silencing unit 117 of the upper body 112 and the lower body 113 further has an opening 1172 respectively disposed on opposite sides of the upper body 112 and the lower body 113 (i.e. the bottom side 1122 of the upper body 112 and the top side 1121 of the lower body 113), and the opposite sides are butted against and close the openings 1172 by butting the upper body 112 against the lower body 113, so that the cavity 1171 of the upper body 112 is communicated to the cavity 1171 of the lower body 113 through the opening 1172 of the lower body 113 via the opening 1172 thereon. But not limited thereto, the openings 1172 of the opposite sides of the upper body 112 and the lower body 113 may be arranged offset and not connected.

Although it is shown that the muffler units 117 of the upper and

lower bodies

112 and 113 are arranged in a plurality of rows at the four corner regions 16 of the upper and

lower bodies

112 and 113. However, in another embodiment, as shown in FIG. 3, the sound-deadening unit 117 is a single or a plurality of holes or grooves arranged in a single row in at least one or four corner regions 16 of the upper body 112 and/or the lower body 113.

Although the openings 1172 of the cavities 1171 of the silencing units 117 of the upper body 112 and lower body 113 are shown as being provided on opposite sides of both the upper body 112 and lower body 113. However, in other embodiments, the opening 1172 of the cavity 1171 of the sound attenuating unit 117 is disposed on an opposite side of the upper body 112 and the lower body 113 (e.g., the bottom side 1122 of the upper body 112 or the top side 1131 of the lower body 113).

In another embodiment, the opening 1172 of the cavity 1171 of the silencing unit 117 is disposed on the top side 1121 of the upper body 112 and/or the bottom side 1132 of the lower body 113, and the opening 1172 is closed by at least one closing member, so that the cavity 1171 of the silencing unit 117 is closed in the upper body 112 and/or the lower body 113 without being communicated with the outside, thereby achieving the purpose of absorbing the vibration of the upper and

lower bodies

112, 113 and the broadband noise generated thereby.

Referring to fig. 1, a stator set 21 is sleeved outside the shaft seat 15 of the frame 11, and the shaft seat 15 is pivoted with a fan wheel 22 having a plurality of blades 221 accommodated in the airflow channel 12, so that the frame 11, the stator set 21 and the fan wheel 22 form a fan 2 (such as an axial fan 2). When the fan wheel 22 of the fan 2 rotates to draw an air flow, the air inlet 13 of the upper body 112 guides the air flow to flow into the air flow channel 12, and during the process that the blades 221 of the fan wheel 22 push the air flow to pressurize, the air flow collides with the channel inner wall 121 in the air flow channel 12 to vibrate the frame 11, and at this time, the vibration is absorbed or blocked and broadband noise caused by the vibration is reduced through the cavities 1171 of the silencing units 117 in the upper and

lower bodies

112, 113, and the air flow pressurized by the blades 221 flows out from the air outlet 14.

Referring to fig. 4, a comparison graph of the frequency spectrum of the broadband noise of the fan according to the present invention and the conventional fan is shown, wherein the vertical axis represents the Sound Pressure Level (SPL) and has a unit of db (SPL); the horizontal axis represents frequency (f) and is in hertz (Hz). As shown in the figure, the curve 31 (solid curve) of the present invention is lower than the known curve 32 (dotted curve), and the noise of the fan broadband is 49.17db (spl) which is obviously lower than the known noise of the fan broadband is 50.61db (spl), therefore, the present invention effectively reduces the noise of the fan broadband compared to the prior art.

Therefore, the cavity 1171 of the silencing unit 117 of the present invention is enclosed in the upper body 112 and/or the lower body 113 of the frame 11, so as to effectively isolate the noise and effectively absorb (reduce) the vibration of the frame 11 and reduce the broadband noise generated by the vibration, thereby effectively achieving the effect of noise reduction.

Claims

1. A fan frame noise reduction structure, comprising:

2. The fan frame noise canceling structure of claim 1, wherein: the frame body is provided with a plurality of corner areas which are respectively positioned at four corners of the frame body, and the cavity of the at least one silencing unit is arranged in the silencing area of at least one or all corner areas.

3. The fan frame noise canceling structure of claim 1, wherein: the silencing unit is a hole or a groove.

4. The fan frame noise reduction structure of claim 1, wherein: the frame body comprises an upper body and a lower body which are combined with each other, the upper body and the lower body are respectively provided with an opposite side corresponding to each other, the cavity of the at least one silencing unit is provided with an opening, the opening is arranged on the opposite side or one of the opposite sides of the upper body and the lower body, and the opening is closed by the opposite side.

5. The fan frame noise reduction structure according to claim 4, wherein: the cross section of the silencing unit is square, round, triangular, arc, oval, long strip or irregular.

6. The fan frame noise reduction structure as claimed in claim 1 or 4, wherein: the at least one silencing unit is arranged in the silencing area in a single row or multiple rows.