CN105020177B - Fan with cooling device - Google Patents

Abstract

The present invention is a fan, comprising a fan frame and an impeller. The fan frame comprises at least one frame wall and at least one base. The base is connected to the frame wall. The impeller is accommodated in the fan frame and arranged on the base. The frame wall is formed with at least one air inlet and at least one air outlet, and the frame wall close to the air inlet or the air outlet is formed with a plurality of air guide surfaces, and the shapes of at least two of the plurality of air guide surfaces on the same side are discontinuous and different. The present invention can reduce the overall noise of the fan without changing the fan blades, the motor and its configuration, and the existing heat dissipation level by arranging a plurality of air guide surfaces at the air outlet and the air inlet, and the plurality of air guide surfaces include at least two air guide surfaces with different shapes, so as to achieve the purpose of reducing the overall noise of the fan.

Description

fan

technical field

The present invention relates to a motor device, and in particular to a fan.

Background technique

The fan frame of a general existing cooling fan has an air inlet and an air outlet, and through the air inlet and the air outlet being connected, a flow channel space can be formed inside the fan frame. In this way, when the fan frame is combined with the motor, the motor can drive the impeller to rotate, and the air flow is introduced from the air inlet and then discharged from the air outlet to achieve heat dissipation.

However, even if the airflow enters vertically from the air inlet, the rotation of the impeller in the fan will change the direction of the airflow path, that is, when the airflow leaves from the air outlet, it will travel in a direction that is not perpendicular to the air outlet, causing the airflow to be on its tangent Under the influence of the component, a vortex (vortex) will be formed in the circulation space, and the impact on the inner wall of the fan frame will generate a narrow-frequency noise (discrete tone). This kind of narrow-band noise will be superimposed with the noise of the motor itself, which will increase the overall noise of the fan.

Therefore, how to provide a fan that can reduce the overall noise to improve the above-mentioned problems is one of the problems that need to be solved urgently in this field.

Contents of the invention

In view of the above problems, the main purpose of the present invention is to provide a fan that can reduce noise.

To achieve the above purpose, the present invention is a fan, including a fan frame and an impeller. The fan frame includes at least one frame wall and at least one base. The base is connected with the frame wall. The impeller is accommodated in the fan frame and arranged on the base. The frame wall is formed with at least one air inlet and at least one air outlet, and the frame wall near the air inlet or the air outlet is formed with a plurality of air guide surfaces, and at least two of the plurality of air guide surfaces on the same side are discontinuous and distinct in shape.

In an embodiment of the present invention, at least two of the plurality of wind guiding surfaces on the same side have different depths.

In an embodiment of the present invention, at least two of the plurality of wind guiding surfaces on the same side have different curvatures. Among them, the curvature includes inner curvature, outer curvature, plane or a combination thereof

In an embodiment of the invention, the impeller further has a hub and a plurality of blades.

In an embodiment of the present invention, the fan frame is square, polygonal or tapered. Wherein, the plurality of wind guiding surfaces are arranged at corners of a square, polygon or cone.

In an embodiment of the present invention, the plurality of air guide surfaces are respectively formed on the frame wall near the air inlet and the air outlet, and at least two of the plurality of air guide surfaces located near the air inlet are The shapes of the wind guide surfaces are discontinuous and different, and the shapes of at least two of the multiple wind guide surfaces located near the air outlet are discontinuous and different.

The present invention further provides a fan, including a fan frame and an impeller. The fan frame includes at least one frame wall and at least one base. At least one base is connected with the frame wall. The impeller is accommodated in the fan frame and arranged on the base. The frame wall is formed with at least one air flow port, and the frame wall close to the air flow port is formed with a plurality of air guiding surfaces. And at least two of the plurality of air guiding surfaces have different shapes and are not parallel to the axial direction of the air flow opening.

The present invention further provides a fan, including a fan frame and an impeller. The fan frame includes at least one frame wall and at least one base. At least one base is connected with the frame wall. The impeller is accommodated in the fan frame and arranged on the base. The frame wall is formed with at least one air inlet and at least one air outlet, and the frame wall near the air inlet or the air outlet is formed with a plurality of air guiding surfaces, and at least two of the multiple air guiding surfaces on the same side The shape of the wind surface is discontinuous.

Therefore, the present invention can provide a plurality of air guide surfaces at the air outlet and air inlet, and the design of the plurality of air guide surfaces includes at least two types of air guide surfaces with different shapes, so that the fan can be used without changing the blades, In the case of the motor and its configuration, and the existing heat dissipation level, the overall noise of the fan can be reduced, and the purpose of reducing the overall noise of the fan can be achieved.

Description of drawings

FIG. 1 is a partially exploded perspective view of a fan according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the fan frame in Fig. 1 along the secant line AA.

FIG. 3 is a schematic perspective view of the fan in FIG. 1 from another perspective.

FIG. 4A is a comparison diagram of noise spectrum of a conventional fan.

FIG. 4B is a comparison diagram of the noise spectrum of the fan in FIG. 1 .

FIG. 5 is a performance comparison chart of the fan shown in FIG. 1 and a conventional fan.

Wherein, the reference signs are explained as follows:

1: fan

10: fan frame

101: frame wall

102: air inlet

102a, 102b: wind guide surface

104: Air outlet

104a, 104b: wind guide surface

12: base

14: impeller

H: height

h ₁ : first depth

h ₂ : second depth

d ₁ : first width

d ₂ : second width

AA: Secant

detailed description

A fan according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.

The fan frame illustrated in the present invention can be applied to a centrifugal fan or an axial flow fan according to different requirements. Although this specification only illustrates an axial flow fan, those skilled in the art should understand and apply this design to a centrifugal fan . In short, the fan used in the present invention will not be limited by this embodiment.

Please refer to FIG. 1 to FIG. 3 , which are a partially exploded perspective view of the fan according to the first embodiment of the present invention, a schematic cross-sectional view of the fan frame in FIG. 1 , and a perspective view of the fan in FIG. 1 from another perspective.

The present invention is a fan 1 including a fan frame 10 and an impeller 14 . The fan frame 10 includes at least one frame wall 101 and at least one base 12 . The base 12 is connected to the frame wall 101 . The impeller 14 can be accommodated in the fan frame 10 and disposed on the base 12 . The impeller 14 further has a hub and a plurality of blades.

In addition, a driving element can be provided on the base 12 to make the impeller 14 rotate and form an air flow.

Please refer to FIG. 2 in particular, at least one frame wall 101 of this embodiment, the frame wall 101 can be formed with at least one air flow opening, for example, can be formed with at least one air inlet 102 and at least one air outlet 104, close to the air inlet 102 or the air outlet The frame wall 101 of the tuyere 104 is formed with a plurality of wind guiding surfaces. Furthermore, the plurality of air guiding surfaces are respectively formed on the frame wall 101 near the air inlet 102 and the air outlet 104 . The impeller 14 can introduce air from the air inlet 102 and discharge the air from the air outlet 104 to achieve the purpose of heat dissipation.

The shape of the fan frame 10 in this embodiment can be square, polygonal or tapered. The plurality of air guiding surfaces of one of the air inlet 102 or the air outlet 104 can be disposed at corners of a square, polygon or cone. And this embodiment exemplifies an implementation pattern in which both the air inlet 102 and the air outlet 104 include multiple air guiding surfaces, but the present invention is not limited to both including multiple air guiding surfaces, and there may also be an implementation aspect that only includes multiple air guiding surfaces. There is an air inlet 102, and only the air outlet 104 includes a plurality of air guiding surfaces.

The difference from the existing fan frame structure is that the air inlet 102 or the air outlet 104 includes multiple air guide surfaces, and at least two of the multiple air guide surfaces on the same side have discontinuous and different shapes. The air guide surfaces of the existing fan frame have the same shape on the same surface (the shapes of the air guide surfaces of the air inlets are all continuous and identical, and the air guide surfaces of the air outlets are all continuous and identical). In other words, the air inlet and outlet surfaces of the air inlet 102 and/or the air outlet 104 can be asymmetrical through these differently shaped air guide surfaces. Furthermore, at least two of the plurality of air guide surfaces have different shapes and are not parallel to the axial direction of the air flow opening.

This embodiment illustrates that at least two of the plurality of air guide surfaces located near the air inlet 102 are discontinuous in shape, preferably discontinuous and different in shape, and that the plurality of air guide surfaces located near the air outlet 104 are discontinuous in shape. At least two of the wind surfaces have discontinuous shapes, preferably discontinuous and different shapes (both the wind inlet surface 102 and the air outlet 104 are equipped with at least two wind guide surfaces with different shapes). Moreover, the advantage of disposing two or more discontinuous (preferably discontinuous and different in shape) air guide surfaces at the air inlet 102 and the air outlet 104 is that even if the airflow is formed in the circulation space formed by the frame wall 101 The vortex is also not easy to hit the same position of the frame wall 101, so the generation of narrow-band noise can be reduced, thereby reducing the overall noise.

This method of improving only the frame wall 101 of the fan frame 10 without improving the rotor part can avoid the need to add new molds to produce the improved rotor structure after the general improvement of the rotor structure and the need to consider whether the improved rotor is Balancing issues and more.

In detail, the "different shapes" referred to here may be that at least two of the plurality of wind guiding surfaces on the same side have different depths, different degrees of chamfer cutting, or may be the same side of the plurality of wind guiding surfaces. In the case where at least two of the wind guiding surfaces have different curvatures (different curvatures). The curvature of "different curvatures" here can be inner curvature, outer curvature, plane or a combination thereof. The "shape discontinuity" mentioned here means that the adjacent air guiding surfaces cannot be extended to form a smooth continuous shape, so that the extended shapes of the plurality of air guiding surfaces at the air outlet side or the outlet side will not form a complete shape.

Furthermore, the user can simultaneously or alternatively adjust the depth and the curvature of the air guide surface according to different shapes of the fan frame 10 to achieve the effect of reducing the overall noise.

For example, please specifically refer to the air inlet 102 of the frame wall 101 in FIG. 2 may have four air guiding surfaces. One of the wind guiding surfaces 102a is in the form of an inclined surface with a first depth h ₁ and a first width d ₁ , in other words, the slope of the inclined surface is h ₁ /d ₁ . And preferably, the first depth h ₁ and the first width d ₁ of this embodiment preferably satisfy the relationship h ₁ ≧d ₁ . The other adjacent wind guiding surface 102b is in an outwardly curved form. Moreover, the wind guiding surfaces 102a, 102b of this embodiment have the same first depth h ₁ . And preferably, if the overall height of the fan frame 10 is defined as H, the first depth h ₁ and the height H of the fan frame 10 preferably satisfy the relational expression h ₁ <1/5H.

Moreover, the air outlet 104 of the frame wall 101 of the fan frame 10 may also have four air guiding surfaces. One of the wind guiding surfaces 104a is inwardly curved and has a second depth h ₂ , while the other adjacent wind guiding surface 104b is in the form of an inclined plane. And preferably, the second depth h ₂ and the second width d ₂ of this embodiment preferably satisfy the relational expression of h ₂ >1.2×d ₂ . And the wind guiding surfaces 104a, 104b of this embodiment have the same second depth h2. And preferably, if the overall height of the fan frame 10 is defined as H, then the first depth h ₂ and the height H of the fan frame 10 preferably satisfy the relationship h ₂ <4/5H.

Finally, please refer to FIG. 4A to FIG. 5 together. FIG. 4A and FIG. 4B are comparison diagrams of the noise spectrum of the conventional fan and the fan in FIG. 1 . FIG. 5 is a performance comparison chart of the fan shown in FIG. 1 and a conventional fan.

It can be clearly understood from the drawing that after the configuration of the embodiment in Fig. 1, under the situation of adopting the same fan blade structure, the peak value of the noise of this embodiment can be reduced from 24.4 decibels to 18.5 decibels compared with the existing fan, In other words, the overall protrusion ratio can be reduced below 20 decibels. Moreover, it can be clearly seen from FIG. 5 that even if the structure of the frame wall is adjusted, the overall performance of the fan will not be affected.

To sum up, in the present invention, at least one of the air outlet and the air inlet is provided with a plurality of air guide surfaces, and the plurality of air guide surfaces include at least two discontinuous or differently shaped air guide surfaces, so that The fan can reduce the overall noise of the fan without changing the fan blades, motor and its configuration, and the existing heat dissipation level, so as to achieve the purpose of reducing fan noise.

The above descriptions are illustrative only, not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the scope of the appended claims.

Claims (10)

1. A fan, comprising: A frame, including: At least one frame wall, the frame wall is formed with at least one air inlet and at least one air outlet, the frame wall near the air inlet or the air outlet is formed with a plurality of air guide surfaces, and the plurality of air guide surfaces on the same side at least two of the wind-guiding surfaces are discontinuous and different in shape; and at least one base connected to the frame wall; and an impeller accommodated in the fan frame and set on the base; Wherein, the shape of the wind surface formed by the plurality of wind guiding surfaces is asymmetric. 2. The fan according to claim 1, wherein at least two of the plurality of air guiding surfaces on the same side have different depths. 3. The fan according to claim 1 or 2, wherein at least two of the plurality of air guiding surfaces on the same side have different curvatures. 4. The fan according to claim 3, wherein the curvature comprises inward curvature, outward curvature, flat surface or a combination thereof. 5. The fan as claimed in claim 1, wherein the impeller further has a hub and a plurality of blades. 6. The fan according to claim 1, wherein the fan frame is square, polygonal or tapered. 7. The fan according to claim 6, wherein the plurality of air guiding surfaces are disposed at corners of the square shape, the polygon shape or the cone shape. 8. The fan according to claim 1, wherein the plurality of air guide surfaces are respectively formed on the frame wall near the air inlet and the air outlet, and the plurality of air guide surfaces near the air inlet The shapes of at least two of the wind guiding surfaces are discontinuous and different, and the shapes of at least two of the plurality of wind guiding surfaces near the air outlet are discontinuous and different. 9. A fan, comprising: A frame, including: At least one frame wall, the frame wall is formed with at least one air flow port, and the frame wall near the air flow port is formed with a plurality of air guide surfaces, and the shape of at least two of the plurality of air guide surfaces is different and non-parallel to the axis of the air flow opening; and at least one base connected to the frame wall; and an impeller accommodated in the fan frame and set on the base; Wherein, the shape of the wind surface formed by the plurality of wind guiding surfaces is asymmetric. 10. A fan, comprising: A frame, including: At least one frame wall, the frame wall is formed with at least one air inlet and at least one air outlet, the frame wall near the air inlet or the air outlet is formed with a plurality of air guide surfaces, and the plurality of air guide surfaces on the same side at least two of the wind-guiding surfaces are discontinuous in shape; and at least one base connected to the frame wall; and an impeller accommodated in the fan frame and set on the base; Wherein, the shape of the wind surface formed by the plurality of wind guiding surfaces is asymmetric.