CN114198321A

CN114198321A - Centrifugal fan with self-adaptive flow channel

Info

Publication number: CN114198321A
Application number: CN202111464788.8A
Authority: CN
Inventors: 王少微; 刘家俊; 王瑜评; 蔡岫羽
Original assignee: Hefei Lianbao Information Technology Co Ltd
Current assignee: Hefei Lianbao Information Technology Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-18
Anticipated expiration: 2041-12-03
Also published as: CN114198321B

Abstract

The application relates to the field of centrifugal fans and discloses a centrifugal fan with a self-adaptive flow channel, which comprises a fan frame and fan blades, wherein the fan blades are contained in the fan frame; the flow passage comprises a floating flow passage, the air inlet is provided with a tongue end, the tongue end is movably connected with the fan frame through an elastic piece, and the blades at the tongue end are arranged at intervals to form the floating flow passage; under the rotation of the fan blades, external air flows in from the air inlet, flows through the flow channel and finally flows out from the air outlet, the tongue end vibrates in a reciprocating mode, and the distance between the tongue end and the fan blades is changed. The centrifugal fan realizes self-adaptive adjustment of a flow channel through the reciprocating vibration of the tongue end, thereby meeting the heat dissipation performance and ensuring low noise.

Description

Centrifugal fan with self-adaptive flow channel

Technical Field

The application relates to the field of centrifugal fans, in particular to a centrifugal fan with a self-adaptive flow channel.

Background

With the development of science and technology, the requirements of people on notebook computers are becoming more and more severe. The notebook must have both lightness, thinness and high efficiency, so the size of the heat dissipation assembly will be reduced accordingly, and how to design a centrifugal fan with high flow and low noise in a limited system space becomes an important issue for many researches.

The flow channel of the centrifugal fan can affect the flow and noise of the fan, the most affected position is at the tongue end, the air flow enters the compression area of the centrifugal fan, the flabellum can generate the rattling noise due to too large impedance when passing through the compression area, in order to solve the rattling noise problem in reality, the angle of the tongue end is increased, the distance between the flabellum and the tongue end is increased, and the effect of reducing the rattling noise is achieved.

In order to meet the performance requirements of users under different situations, the standard rotation speed sound pressure value of the fan should be limited to 17 db to 45 db, and the quality of each noise level should meet the standards set by customers. However, the design of the fixed tongue end cannot meet the requirements of optimizing the noise quality and performance of each stage of the fan, so that the comprehensive performance competitiveness is poor, the noise quality and the performance are mutually restricted, the best experience of a user cannot be provided, only one of the noise quality or the performance can be obtained, and the use experience of the user is poor.

Disclosure of Invention

This application mainly solves the tongue end that prior art exists and is fixed structure, can not compromise the technical problem of heat dispersion and noise quality simultaneously, provides the reciprocal vibration through the tongue end and realizes the self-adaptation adjustment of runner to can guarantee the centrifugal fan of low noise again when satisfying heat dispersion.

In order to solve the above technical problems and achieve the above object, the present application provides a centrifugal fan with a self-adaptive flow channel, which is characterized by comprising a fan frame and fan blades, wherein the fan blades are accommodated in the fan frame, the fan frame is provided with a flow channel around the fan blades, and the flow channel comprises an air inlet and an air outlet; the flow channel comprises a floating flow channel, the air inlet is provided with a tongue end, the tongue end is movably connected with the fan frame through an elastic piece, and the blades at the tongue end are arranged at intervals to form the floating flow channel; under the rotation of flabellum, outside air by the air intake inflow warp the runner passes through at last the air outlet flows out, just tongue end reciprocating vibration, tongue end with the interval between the flabellum changes the setting.

In an implementation manner, the fan frame includes a frame and a bottom plate, the bottom plate is rotatably connected to the fan blade, and the frame is connected to the tongue end through the elastic member.

In an implementation mode, the tongue end comprises a swinging section and a limiting section, the swinging section is connected with the limiting section, an included angle is formed between the swinging section and the limiting section, a connecting part is formed at the joint of the swinging section and the limiting section, a first end of the elastic part is connected with the frame, and a second end of the elastic part is connected with the connecting part.

In an implementation mode, the other end of the swinging section, which is connected with the limiting section, is provided with a rotating part, the swinging section is rotatably connected with the fan frame through the rotating part, and the swinging section swings around the rotating part under the rotation of the fan blade.

In an implementation manner, a limiting portion is disposed between the other end of the limiting section connected with the swinging section and the fan frame, and the limiting portion is used for controlling the swinging range of the tongue end.

In an implementation mode, spacing portion includes spacing and swing piece, the swing piece sets up spacing section with the other end that the swing section links to each other, spacing with the fan frame links to each other, be provided with on the spacing and hold the chamber, hold the chamber orientation spacing section one side is provided with the opening, the swing piece sets up all the time hold the intracavity under the rotation of flabellum, the swing piece is in hold the intracavity swing setting.

In one embodiment, the runners include a fixed runner and the floating runner, and the fixed runner is formed by the frame and the fan blade being spaced apart from each other.

In an implementation manner, the fan frame further includes a top plate, the top plate is disposed at the top of the frame, the bottom plate is disposed at the bottom of the frame, the frame is connected to the bottom plate and the top plate respectively to form the fan frame with an opening on one side, and the air inlet and the air outlet are disposed on the side of the fan frame with the opening.

Compared with the prior art, the centrifugal fan with the self-adaptive flow channel has the following beneficial effects:

1. the tongue end is movably arranged through the elastic piece, so that the tongue end performs small reciprocating vibration under the action of air flow compression and air pressure, the flow channel is changed, sound energy caused by partial air pressure is absorbed, and the noise reduction effect is exerted;

2. the floating runner can not reduce the flow of the whole air flow due to the small vibration of the tongue end, so that the noise is reduced on the basis of high-efficiency cooling;

3. the elastic part provides the supporting force that the tongue end resists the wind pressure when the flabellum rotates, avoids the tongue end to appear removing by a wide margin to influence centrifugal fan's cooling effect.

Therefore, the radiating device has the advantages of being good in radiating performance and low in noise.

Drawings

FIG. 1 is a top view of a centrifugal fan of the present application with the top plate removed;

FIG. 2 is a schematic structural diagram of a centrifugal fan according to the present application;

fig. 3 is a partially enlarged view of the present application a.

The reference numbers in the figures illustrate: 1. a fan blade; 2. an air inlet; 3. an air outlet; 4. a floating runner; 5. an elastic member; 6. a frame; 7. a base plate; 8. a swing section; 9. a limiting section; 10. a connecting portion; 11. a rotating part; 12. a limiting frame; 13. a swinging sheet; 14. an accommodating chamber; 15. a fixed runner; 16. a top plate; 17. a limiting part.

Detailed Description

In order to make the objects, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical problem that the tongue end is of a fixed structure and heat dissipation performance and noise quality cannot be simultaneously considered exists in the prior art.

Therefore, the application provides a centrifugal fan with a self-adaptive flow channel, which comprises a fan frame and fan blades 1, wherein the fan blades 1 are accommodated in the fan frame, the fan frame is internally provided with the flow channel around the fan blades 1, and the flow channel comprises an air inlet 2 and an air outlet 3; the flow passage comprises a floating flow passage 4, the air inlet 2 is provided with a tongue end, the tongue end is movably connected with the fan frame through an elastic piece 5, and the tongue end fan blades 1 are arranged at intervals to form the floating flow passage 4; under the rotation of the fan blade 1, external air flows in from the air inlet 2, flows through the flow channel and finally flows out from the air outlet 3, the tongue end vibrates in a reciprocating manner, and the distance between the tongue end and the fan blade 1 is changed.

Example (b):

fig. 1 to 3 show an embodiment of a centrifugal fan with an adaptive flow channel according to the present application.

Referring to fig. 1, in an embodiment of the present application, a centrifugal fan with an adaptive flow channel is shown, the centrifugal fan with an adaptive flow channel is installed in an electronic device for cooling, and in a preferred state, the centrifugal fan with an adaptive flow channel is installed in a notebook computer to cool the inside of the notebook computer.

The centrifugal fan with the self-adaptive flow channel comprises a fan frame and fan blades 1, wherein the fan blades 1 are contained in the fan frame, the fan frame is internally provided with the flow channel around the fan blades 1, the flow channel comprises an air inlet 2 and an air outlet 3, and under the rotation of the fan blades 1, airflow continuously enters from the air inlet 2, passes through the flow channel and then flows out from the air outlet 3. Therefore, under the continuous circulation action of the airflow, the temperature of the interior of the electronic equipment is reduced.

The flow channel comprises a floating flow channel 4, the air inlet 2 is provided with a tongue end, the tongue end is movably connected with the fan frame through an elastic piece 5, and the tongue end and the fan blade 1 are arranged at intervals to form the floating flow channel 4. The floating runner 4 is the area between the tongue end and the fan blade 1. Because of the movable arrangement of the tongue end, the distance between the floating runners 4 can be changed, i.e. the distance between the tongue end and the fan blade 1 can be changed. The floating flow channel 4 is the area where the air flow enters the compression area of the centrifugal fan, resulting in an increase in air pressure there.

Under the rotation of the fan blade 1, external air flows in from the air inlet 2, flows through the flow channel and finally flows out from the air outlet 3, the tongue end vibrates in a small reciprocating mode under the compression of air flow and the action of air pressure, the flow channel is changed, sound energy caused by the air pressure is absorbed, the noise reduction effect is achieved, and the floating type flow channel 4 cannot excessively reduce the flow rate of the whole air flow due to the small vibration of the tongue end. Thereby realizing noise reduction on the basis of high-efficient cooling simultaneously.

The elastic part 5 provides a supporting force for resisting the wind pressure by the tongue end when the fan blade 1 rotates, and the tongue end is prevented from moving greatly, so that the cooling effect of the centrifugal fan is influenced. The present application does not simply move the tongue end, and the simple movement of the tongue end will result in the floating type flow channel 4 having too large space, which also solves the above technical problem. The application directly absorbs the sound energy that the wind pressure caused through the small amplitude vibration of removing the tongue end to reach the effect of noise reduction. The noise of the fan blade 1 is still existed in nature, because the distance between the floating type flow passages 4 is not reduced too much in nature, the basic theory that the distance between the fan blade 1 and the tongue end is small, the cooling effect is obvious, but the noise is generated is also met.

The small vibration of the tongue end can also realize the self-adaptive adjustment of the floating runner 4 to a certain degree, thereby realizing the optimization of the airflow entering the floating runner 4, wherein the optimization standard is based on meeting the cooling standard. The variation of the amplitude of the vibration of the tongue end is mainly achieved by adjusting the modulus of elasticity of the elastic member 5.

Referring to fig. 2, in the embodiment of the present application, the sash frame includes a frame 6, a bottom plate 7 and a top plate 16, the frame 6 is a U-shaped plate structure, the frame 6 includes a side wall and a bottom wall, the bottom wall is an arc structure, the side wall is connected to two ends of the bottom wall, and in a preferred state, the two side walls are symmetrically disposed along a center line of the bottom wall. The bottom plate 7 is arranged at the bottom of the rim 6 and the top plate 16 is arranged at the top of the rim 6. Under preferred state, bottom plate 7 links to each other with frame 6 is fixed, and roof 16 can be dismantled with frame 6 and be connected, and roof 16 is connected the maintenance that makes things convenient for the centrifugal fan with dismantling of frame 6. The frame 6 is connected with the top plate 16 and the bottom plate 7 respectively to form a fan frame with an opening on one side, the opening of the fan frame is the opening of the frame 6, and the air outlet 3 and the air inlet 2 are both arranged on the side with the opening of the fan frame, so as to facilitate the air flow to flow in and flow out.

Wherein, flabellum 1 realizes rotating under the circumstances of circular telegram, and flabellum 1 links to each other with bottom plate 7 through the axis of rotation, and the eccentric connection between flabellum 1 and bottom plate 7, flabellum 1 is unequal to the distance of both sides limit wall promptly, and the distance that is provided with 2 one sides flabellum 1 of air intake and limit wall is shorter than the distance that is provided with 3 one sides flabellum 1 of air outlet and limit wall to the air current appears the compression when getting into from air intake 2.

Wherein, the frame 6 is connected with the tongue end through the elastic piece 5, and the tongue end is separated from the bottom plate 7, thereby avoiding the noise caused by the interference between the tongue end and the bottom plate 7 in the reciprocating vibration process of the tongue end.

In the embodiment of the present application, the tongue end includes a swinging section 8 and a limiting section 9, and the swinging section 8 is connected to the limiting section 9. An included angle is formed between the swinging section 8 and the limiting section 9, and the limiting section 9 needs to be far away from the fan blade 1 to deflect when the tongue end is specifically installed. Under preferred state, swing section 8 is arc structure or linear structure, and when the swing section was the arc structure, the radian of swing section 8 was unanimous with the radian of diapire, noticed the centre of a circle of swing section 8 and set up towards flabellum 1 one side when specifically installing the tongue end. Swing section 8 forms connecting portion 10 with spacing 9 junction, and under the preferred state, connecting portion 10 radius angle sets up, all is provided with the spliced pole on connecting portion 10 and the frame 6, and the spliced pole is passed through to the first end of elastic component 5 and is linked to each other with connecting portion 10, and the spliced pole is passed through to the second end of elastic component 5 and is linked to each other with frame 6.

In the specific embodiment of the present application, the other end of the swinging section 8 connected to the limiting section 9 is provided with a rotating portion 11, the swinging section 8 is rotatably connected to the fan frame through the rotating portion 11, the swinging section 8 swings around the rotating portion 11 under the rotation of the fan blade 1, and the rotating position is locked through the rotating portion 11.

Wherein, rotation portion is including setting up the centre bore on frame 6 and the center post that links to each other with swing section 8, and the center post becomes clearance fit with the centre bore, and the centre bore presents through the stopper with frame 6 integrated into one piece, and the centre bore setting is on the stopper promptly, is provided with the export on the stopper, and export and centre bore intercommunication set up, export along the axial setting of centre bore, export confession swing section is worn out, also can restrict tongue end, swing angle to a certain extent.

Referring to fig. 3, in the embodiment of the present application, a limiting portion 17 is provided between the other end of the limiting section 9 connected to the swing section 8 and the body box, and the limiting portion 17 is used for controlling the swing range of the tongue end.

The limiting part 17 includes a limiting frame 12 and a swinging piece 13, the swinging piece 13 is disposed at the other end of the limiting section 9 connected to the swinging section 8, the limiting frame 12 is connected to the fan frame, and more specifically, can be connected to the frame 6 or the bottom plate 7, and in the embodiment of the present application, is connected to the frame 6. Be provided with on spacing 12 and hold chamber 14, hold chamber 14 and be provided with the opening towards spacing section 9 one side, swing piece 13 sets up all the time and holds chamber 14 in, and under the rotation of flabellum 1, swing piece 13 sets up holding the intracavity 14 internal swing.

In the embodiment of the present application, the flow channels include fixed flow and floating flow channels 4, the fixed flow channel 15 is disposed in communication with the floating flow channel 4, the fixed flow channel 15 is formed by disposing the frame 6 and the fan blade 1 at an interval, and the fixed flow channel 15 is the area between the frame 6 and the fan blade 1, but does not include the portion of the frame 6 connecting the swing section 8.

In the specific embodiment of the application, the locking piece is arranged on the outer side of the fan frame and is used for being fixedly connected with the electronic equipment.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The centrifugal fan with the self-adaptive flow channel is characterized by comprising a fan frame and fan blades (1), wherein the fan blades (1) are accommodated in the fan frame, the fan frame is internally provided with the flow channel around the fan blades (1), and the flow channel comprises an air inlet (2) and an air outlet (3); the flow channel comprises a floating flow channel (4), the air inlet (2) is provided with a tongue end, the tongue end is movably connected with the fan frame through an elastic piece (5), and the fan blades (1) at the tongue end are arranged at intervals to form the floating flow channel (4); under the rotation of flabellum (1), outside air by air intake (2) inflow warp the runner passes through at last air outlet (3) flow, just tongue end reciprocating vibration, tongue end with interval change setting between flabellum (1).

2. The centrifugal fan with the adaptive flow channel according to claim 1, wherein the fan frame comprises a frame (6) and a bottom plate (7), the bottom plate (7) is rotatably connected with the fan blade (1), and the frame (6) is connected with the tongue end through the elastic member (5).

3. The centrifugal fan with the self-adaptive flow channel as claimed in claim 2, wherein the tongue end comprises a swing section (8) and a limiting section (9), the swing section (8) is connected with the limiting section (9), an included angle is formed between the swing section (8) and the limiting section (9), a connecting portion (10) is formed at the joint of the swing section (8) and the limiting section (9), the first end of the elastic member (5) is connected with the frame (6), and the second end of the elastic member (5) is connected with the connecting portion (10).

4. The centrifugal fan with the adaptive flow channel according to claim 3, wherein a rotating portion (11) is disposed at the other end of the swinging section (8) connected to the limiting section (9), the swinging section (8) is rotatably connected to the fan frame through the rotating portion (11), and the swinging section (8) is arranged to swing around the rotating portion (11) under the rotation of the fan blade (1).

5. The centrifugal fan with the adaptive flow channel according to claim 3, wherein a limiting part (17) is arranged between the other end of the limiting section (9) connected with the swinging section (8) and the fan frame, and the limiting part (17) is used for controlling the swinging range of the tongue end.

6. The centrifugal fan with the self-adaptive flow channel according to claim 5, wherein the limiting portion (17) comprises a limiting frame (12) and a swinging piece (13), the swinging piece (13) is arranged at the other end of the limiting section (9) connected with the swinging section (8), the limiting frame (12) is connected with the fan frame, an accommodating cavity (14) is arranged on the limiting frame (12), an opening is formed in one side, facing the limiting section (9), of the accommodating cavity (14), the swinging piece (13) is always arranged in the accommodating cavity (14), and the swinging piece (13) is arranged in the accommodating cavity (14) under the rotation of the fan blade (1).

7. The centrifugal fan with adaptive flow channel according to any one of claims 2-6, wherein the flow channel comprises a fixed flow channel (15) and the floating flow channel (4), the fixed flow channel (15) is formed by the frame (6) and the fan blade (1) being spaced apart.

8. The centrifugal fan with the adaptive flow channel according to claim 7, wherein the fan frame further comprises a top plate (16), the top plate (16) is disposed on the top of the frame (6), the bottom plate (7) is disposed on the bottom of the frame (6), the frame (6) is connected to the bottom plate (7) and the top plate (16) respectively to form the fan frame with an opening on one side, and the air inlet (2) and the air outlet (3) are disposed on the side with the opening of the fan frame.