Split-flow cooling fan

Abstract

The application discloses a shunt type heat dissipation fan, which comprises a frame and a fan wheel accommodated in the frame, wherein the fan wheel has a fan wheel center line arranged along a first direction, one side of the frame is provided with an air outlet, a flow channel is formed in the frame outside the fan wheel, and a plurality of guide vanes for uniformly shunting airflow are arranged in the flow channel along the direction of airflow. The application installs a plurality of guide vanes in the flow channel, so that the airflow in the flow channel is more uniform, the airflow vortex is reduced, the aerodynamic noise and vibration noise are reduced, the negative pressure area is balanced, and a larger actual air inlet area is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of fan, and particularly relates to a shunt type cooling fan. BACKGROUND

[0002] Fans are needed in many electronic products, and the air flow generated by the fan can take away the heat generated by electronic components, so as to ensure the normal operation of the electronic product. The flow channel of the cooling fan is generally designed as a circle or several tangent arcs in the market, and the design has great randomness. The unreasonable circular arc size can increase the air flow resistance and reduce the fan outlet pressure, thereby increasing the energy consumption.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a shunt type cooling fan. SUMMARY

[0004] Therefore, the present application aims to provide a shunt type cooling fan to maximize the reduction of energy consumption.

[0005] In order to achieve the above-mentioned purpose, the technical scheme provided by an embodiment of the present application is as follows:

[0006] A shunt type cooling fan, comprising a frame and a fan wheel accommodated in the frame, the fan wheel has a fan wheel center line arranged in a first direction, one side of the frame is formed with an air outlet, and a flow channel is formed in the frame outside the fan wheel, and a plurality of guide vanes for uniformly shunting the air flow are arranged in the flow channel along the direction of air flow.

[0007] In an embodiment, the guide vanes are arranged in the flow channel on the right side of the fan wheel center line.

[0008] In an embodiment, the guide vanes extend in an Archimedes spiral or a logarithmic spiral.

[0009] In an embodiment, any one of the plurality of guide vanes is partially arranged opposite to at least one of the other guide vanes.

[0010] In an embodiment, the frame comprises a bottom plate for mounting the fan wheel and a side plate mounted on the periphery of the bottom plate, and the guide vanes are vertically fixedly mounted on the bottom plate.

[0011] In an embodiment, the side plate comprises a first flat section, a curved section and a second flat section connected in sequence, the first flat section and the second flat section form the air outlet, the opening of the air outlet gradually increases towards the outside of the frame, the second flat section is arranged in the first direction, and the curved section extends in an Archimedes spiral or a logarithmic spiral.

[0012] In an embodiment, the flow channel is divided into a tail flow area, a jet flow area and a rotating pressurization area in sequence in a counterclockwise direction by a plurality of division lines, and the guide vanes are respectively located in the rotating pressurization area, across the rotating pressurization area and the jet flow area, in the jet flow area and across the jet flow area and the tail flow area.

[0013] In an embodiment, the division lines include a first division line, a second division line and a third division line, the first division line is a line connecting the shortest distance between the outer periphery of the fan wheel and the curved section, the second division line is located on the right side of the center line of the fan wheel and has one end tangent to the outer periphery of the fan wheel in the first direction and the other end extending towards the air outlet in the first direction, and the third division line is arranged in the second direction and is perpendicular to the second division line, and one end of the third division line is connected to the end of the second division line tangent to the outer periphery of the fan wheel.

[0014] In an embodiment, the part of the guide vanes located in the rotating pressurization area is arranged close to the curved section and the distance between the part of the guide vanes and the curved section is less than 1 / 2 of the width of the flow channel where the part of the guide vanes is located, another part of the guide vanes located in the rotating pressurization area is arranged close to the curved section and the distance between the part of the guide vanes and the curved section is equal to 1 / 2-1 / 4 of the width of the flow channel where the part of the guide vanes is located, the guide vanes across the rotating pressurization area and the jet flow area are arranged close to the fan wheel and the distance between the part of the guide vanes and the curved section is equal to 1 / 2-3 / 4 of the width of the flow channel where the part of the guide vanes is located, the guide vanes across the jet flow area and the tail flow area are arranged close to the fan wheel and the distance between the part of the guide vanes and the curved section is equal to 1 / 2-3 / 4 of the width of the flow channel where the part of the guide vanes is located, and the guide vanes located in the jet flow area are arranged close to the second straight section and the distance between the part of the guide vanes and the second straight section is equal to 1 / 2-1 / 4 of the width of the flow channel where the part of the guide vanes is located.

[0015] In an embodiment, a wind baffle is installed at the first straight section, one end of the wind baffle is connected to the first straight section, the other end of the wind baffle extends away from the curved section and close to the outer periphery of the fan wheel, and the distance between the end of the other end of the wind baffle and the outer periphery of the fan wheel is less than the minimum distance between the outer periphery of the fan wheel and the curved section.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The shunt type cooling fan in the present application installs a plurality of guide vanes in the flow channel, so that the gas flow in the flow channel is more uniform, the airflow vortex is reduced, the aerodynamic noise and vibration noise are reduced, the negative pressure area is balanced, and a larger actual air inlet area is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the first planar structure of a split-flow cooling fan in one embodiment of the present invention;

[0020] Figure 2 A simplified planar structural diagram of a split-flow cooling fan according to an embodiment of the present invention;

[0021] Figure 3 This is a second front structural schematic diagram of a split-flow cooling fan in one embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0023] The present invention discloses a diversion type cooling fan, comprising a frame and a fan wheel accommodated in the frame, the fan wheel having a fan wheel center line arranged along a first direction, an air outlet formed on one side of the frame, a flow channel formed in the frame at the periphery of the fan wheel, and a plurality of guide vanes for evenly diverting the airflow are installed in the flow channel along the direction of airflow.

[0024] The present invention will be further described below with reference to specific embodiments.

[0025] Ginseng Figure 1 As shown, a diversion type cooling fan includes a frame 10 and a fan wheel 1 accommodated in the frame 10, the fan wheel 1 has a fan wheel center line L set along a first direction, an air outlet is formed on one side of the frame 10, the first direction is the y-axis direction, a flow channel is formed in the frame 10 on the periphery of the fan wheel 1, the width of the flow channel gradually increases along the direction of airflow travel, and a plurality of guide vanes 2 for evenly diverting the airflow are installed in the flow channel along the direction of airflow travel, and the guide vanes 2 extend in an arc shape.

[0026] Furthermore, the guide vane 2 is arranged in the flow channel on the right side of the impeller center line L, and the guide vane 2 extends in an Archimedean spiral or a logarithmic spiral.

[0027] Ginseng Figure 1As shown, the frame body 10 includes a bottom plate 11 for mounting the fan wheel 1 and a side plate mounted on the periphery of the bottom plate 11, and a cover plate is also mounted on the side plate, and the bottom plate 11, the side plate and the cover plate together form a cavity for accommodating the fan wheel 1, wherein the side plate includes a first flat section 121, a curved section 122 and a second flat section 123 connected in sequence, the first flat section 121 and the second flat section 123 form an air outlet, the opening of the air outlet gradually increases towards the outside of the frame body 10, specifically, the opening of the air outlet gradually increases towards the outside of the cavity, the second flat section 123 is arranged along the first direction, the first flat section 121 is arranged obliquely, and the curved section 122 extends in an Archimedes spiral or a logarithmic spiral, and the guide vane 2 is vertically fixedly mounted on the bottom plate 11.

[0028] Referring to Figure 2 In combination Figure 1 As shown, the flow channel is divided into a wake flow area I, a jet flow area II and a rotating pressurization area III by a plurality of division lines, the wake flow area I, the jet flow area II and the rotating pressurization area III are arranged in sequence in the counterclockwise direction, and the guide vanes 2 are respectively located in the rotating pressurization area III, across the rotating pressurization area III and the jet flow area II, in the jet flow area II and across the jet flow area II and the wake flow area I.

[0029] Among them, the plurality of division lines include a first division line L1, a second division line L2 and a third division line L3, the first division line L1 is a connecting line of the shortest distance between the outer periphery of the fan wheel 1 and the curved section 122, the second division line L2 is located on the right side of the fan wheel center line L and one end is tangent to the outer periphery of the fan wheel 1 along the first direction and the other end extends towards the air outlet along the first direction, and the third division line L3 is arranged along the second direction and is perpendicular to the second division line L2, one end of the third division line L3 connects the end of the second division line L2 tangent to the outer periphery of the fan wheel 1, and the second direction is the x-axis direction.

[0030] Referring to Figure 1 As shown, the part of the guide vanes 2 located in the rotating pressurization area III is arranged close to the curved section 122 and the distance from the curved section 122 is less than 1 / 2 of the width of the flow channel where the guide vane 2 is located, another part of the guide vanes 2 located in the rotating pressurization area III is arranged close to the curved section 122 and the distance from the curved section 122 is equal to 1 / 2-1 / 4 of the width of the flow channel where the guide vane 2 is located, the guide vanes 2 across the rotating pressurization area III and the jet flow area II are arranged close to the fan wheel 1 and the distance from the curved section 122 is equal to 1 / 2-3 / 4 of the width of the flow channel where the guide vane 2 is located, the guide vanes 2 across the jet flow area II and the wake flow area I are arranged close to the fan wheel 1 and the distance from the curved section 122 is equal to 1 / 2-3 / 4 of the width of the flow channel where the guide vane 2 is located, and the guide vanes 2 located in the jet flow area II are arranged close to the second flat section 123 and the distance from the second flat section 123 is equal to 1 / 2-1 / 4 of the width of the flow channel where the guide vane 2 is located.

[0031] In the embodiment, the wind deflector 3 is arranged at the first straight section 121, the wind deflector 3 is arc-shaped, one end of the wind deflector 3 is connected with the first straight section 121, the other end of the wind deflector 3 extends away from the curved section 122 and close to the outer periphery of the fan wheel 1, the distance between the end of the other end of the wind deflector 3 and the outer periphery of the fan wheel 1 is less than the minimum distance between the outer periphery of the fan wheel 1 and the curved section 122, the minimum distance is between the outer periphery of the fan wheel 1 and the curved section 122, and the other end of the wind deflector 3 is tangent to the first straight section 121.

[0032] Referring to FIG. 1, the plurality of guide vanes 2 are arranged in the rotating pressure area III, the jet flow area II and the wake flow area I. Figure 1 As shown in FIG. 1, any one of the plurality of guide vanes 2 is arranged opposite to at least one of the other guide vanes 2, so as to form an air flow channel between the guide vanes 2.

[0033] The embodiment is further described in detail by taking five guide vanes as an example.

[0034] Referring to FIG. 1, the plurality of guide vanes 2 are arranged in the rotating pressure area III, the jet flow area II and the wake flow area I. Figure 3 As shown in FIG. 1, the five guide vanes 2 are respectively a first guide vane 21, a second guide vane 22, a third guide vane 23, a fourth guide vane 24 and a fifth guide vane 25, the first guide vane 21 and the second guide vane 22 are located in the rotating pressure area III, the third guide vane 23 spans the rotating pressure area III and the jet flow area II, the fifth guide vane 25 is located in the jet flow area II, and the fourth guide vane 24 spans the jet flow area II and the wake flow area I.

[0035] The first guide vane 21 is arranged close to the curved section 122 and the distance between the first guide vane 21 and the curved section 122 is less than 1 / 2 of the width of the flow channel where the first guide vane 21 is arranged, preferably 1 / 4, the first guide vane 21 is the shortest among the five guide vanes and plays a role of pre-distribution.

[0036] The second guide vane 22 is arranged close to the curved section 122 and the distance between the second guide vane 22 and the curved section 122 is equal to 1 / 2-1 / 4 of the width of the flow channel where the second guide vane 22 is arranged, preferably 3 / 8, the second guide vane 22 is the longest among the five guide vanes and plays a role of main distribution.

[0037] The third guide vane 23 is arranged close to the fan wheel 1 and the distance between the third guide vane 23 and the curved section 122 is equal to 1 / 2-3 / 4 of the width of the flow channel where the third guide vane 23 is arranged, preferably 1 / 2.

[0038] The fourth guide vane 24 is arranged close to the fan wheel 1 and the distance between the fourth guide vane 24 and the curved section 122 is equal to 1 / 2-3 / 4 of the width of the flow channel where the fourth guide vane 24 is arranged, preferably 5 / 8.

[0039] The fifth guide vane 25 is arranged close to the second straight section 123 and the distance between the fifth guide vane 25 and the second straight section 123 is equal to 1 / 2-1 / 4 of the width of the flow channel where the fifth guide vane 25 is arranged, preferably 1 / 4.

[0040] The lengths of the third guide vane 23, the fourth guide vane 24 and the fifth guide vane 25 can be designed as required, preferably, the lengths of the third guide vane 23 and the fourth guide vane 24 are the same, and the length of the fifth guide vane 25 is greater than the lengths of the third guide vane 23 and the fourth guide vane 24.

[0041] Referring to FIG. 1, the first guide vane 21 and the second guide vane 22 have a gas flow channel due to spatially overlapping each other, the second guide vane 22 and the third guide vane 23 have a gas flow channel due to spatially overlapping each other, and the third guide vane 23 and the fifth guide vane 25 and the third guide vane 23 and the fourth guide vane 24 have gas flow channels due to spatially overlapping each other. Figure 3

[0042] From the above technical solutions, the present application has the following beneficial effects:

[0043] The shunt type cooling fan in the present application makes the gas flow in the flow channel more uniform by installing multiple guide vanes in the flow channel, reduces gas flow vortex, reduces aerodynamic noise and vibration noise, balances the negative pressure area, and ensures greater actual air inlet area.

[0044] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description manner of the specification is only for clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other implementation manners that those skilled in the art can understand.​

Claims

1. A split-flow cooling fan, characterized in that: The split-flow cooling fan includes a frame and a fan wheel accommodated in the frame, the fan wheel having a fan wheel center line arranged along a first direction, an air outlet formed on one side of the frame, a flow channel formed in the frame at the periphery of the fan wheel, a plurality of guide vanes for evenly diverting the airflow are installed in the flow channel along the direction of airflow, the flow channel is divided into a wake area, a jet area and a rotary pressurization area by a plurality of dividing lines, the wake area, the jet area and the rotary pressurization area are arranged in sequence in a counterclockwise direction, and the guide vanes are respectively located in the rotary pressurization area, across the rotary pressurization area and the jet area, located in the jet area and across the jet area and the wake area; Along the width direction of the flow channel, any two adjacent guide plates form an airflow channel generated by overlapping projections in space, and any two adjacent guide plates form a section at both ends along the direction of airflow travel that does not overlap projections in space.

2. The split-flow cooling fan according to claim 1, characterized in that: The guide vane is arranged in the flow channel on the right side of the impeller centerline.

3. The split-flow cooling fan according to claim 1, characterized in that: The guide plate extends in an Archimedean spiral or a logarithmic spiral.

4. The split-flow cooling fan according to claim 1, characterized in that: The frame includes a bottom plate for mounting the impeller and side plates mounted on the periphery of the bottom plate, and the guide vanes are vertically fixedly mounted on the bottom plate.

5. The split-flow cooling fan according to claim 4, characterized in that: The side panel includes a first straight section, a curved section and a second straight section connected in sequence. The first straight section and the second straight section form an air outlet, and the opening of the air outlet gradually increases toward the outside of the frame. The second straight section is arranged along the first direction, and the curved section extends in an Archimedean spiral or a logarithmic spiral.

6. The split-flow cooling fan according to any one of claims 1 to 5, characterized in that: The dividing lines include a first dividing line, a second dividing line and a third dividing line. The first dividing line is a line connecting the shortest distance between the outer periphery of the impeller and the curved section. The second dividing line is located on the right side of the center line of the impeller and one end is tangent to the outer periphery of the impeller along the first direction, and the other end extends toward the air outlet along the first direction. The third dividing line is set along the second direction and is perpendicular to the second dividing line. One end of the third dividing line is connected to the end of the second dividing line that is tangent to the outer periphery of the impeller.

7. The split-flow cooling fan according to any one of claims 1 to 5, characterized in that: Some of the guide vanes located in the rotating pressurizing area are arranged close to the curved section and the distance from the curved section is less than 1 / 2 of the width of the flow channel where the guide vanes are located. Another part of the guide vanes located in the rotating pressurizing area are arranged close to the curved section and the distance from the curved section is equal to 1 / 2~1 / 4 of the width of the flow channel where the guide vanes are located. The guide vanes spanning the rotating pressurizing area and the jet area are arranged close to the impeller and the distance from the curved section is equal to 1 / 2~3 / 4 of the width of the flow channel where the guide vanes are located. The guide vanes spanning the jet area and the wake area are arranged close to the impeller and the distance from the curved section is equal to 1 / 2~3 / 4 of the width of the flow channel where the guide vanes are located. The guide vanes located in the jet area are arranged close to the second straight section and the distance from the second straight section is equal to 1 / 2~1 / 4 of the width of the flow channel where the guide vanes are located.

8. The split-flow cooling fan according to claim 5, characterized in that: A wind shield is installed at the first straight section, one end of the wind shield is connected to the first straight section, and the other end extends in a direction away from the curved section and close to the outer periphery of the fan wheel, and the distance between the end of the other end and the outer periphery of the fan wheel is less than the minimum distance between the outer periphery of the fan wheel and the curved section.

9. The split-flow cooling fan according to claim 8, characterized in that: The windshield is arc-shaped.

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