CN112922862A

CN112922862A - Fan module and heat dissipation system comprising same

Info

Publication number: CN112922862A
Application number: CN201911237578.8A
Authority: CN
Inventors: 黄顺治; 毛黛娟; 郭春亮
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2021-06-08

Abstract

The invention relates to a fan module and a heat dissipation system comprising the same. The shell part surrounds the fan body. The fan cover portion comprises at least one movable blade extending from the housing portion along a pivot axis of the fan body. The movable blade has a fixed end and a free end opposite to each other. The fixed end is fixed on the shell part. The free end is movable relative to the housing portion to vary a distance between the free end and the pivot axis. In addition, the invention also relates to a heat dissipation system comprising the fan module.

Description

Fan module and heat dissipation system comprising same

Technical Field

The present disclosure relates to heat dissipation devices, and particularly to a fan module and a heat dissipation system including the same.

Background

The display card (graphic card) is mainly used for generating output images to the display. With the rapid development of industries such as games, 2D/3D drawing or multimedia production, in addition to driving the rapid growth of the display card market, the selection and requirements of consumers for display cards are also more and more stringent. For example, in order to avoid the influence of the operating temperature of the display card on the performance of the display card, the performance of the heat dissipation mechanism is also one of the key factors for the consumer to purchase the display card.

The display card generally adopts an air-cooled heat dissipation method, and specifically, one or more fans can be stacked on the heat dissipation fins according to the size of the display card, so as to take away the heat energy absorbed by the heat dissipation fins from the display card. Among them, the axial flow fan has advantages of low noise, large air volume, and the like, and thus is the mainstream choice for the display card cooling fan.

Generally, the fan speed is dynamically adjusted according to the operation degree of the display card, when the rotation speed of the display card is increased, the rotation speed of the fan is increased to provide more cooling air flow, and conversely, when the rotation speed of the display card is decreased, the rotation speed of the fan is decreased. However, the display card heat dissipation module on the market at present has no flexibility of changing the rotating speed of the corresponding fan. In detail, the structural design of the conventional display card heat dissipation module using an axial flow fan is a fixed form, and if the structural design of the heat dissipation module can achieve the best heat dissipation efficiency when the fan is at a high rotation speed, the structural design cannot maintain the same degree of heat dissipation efficiency when the fan is at a low rotation speed; on the contrary, if the structural design of the heat dissipation module can achieve the best heat dissipation efficiency when the fan is at a low rotation speed, the structural design cannot achieve the same degree of heat dissipation efficiency when the fan is at a high rotation speed. That is, under the design of the conventional heat dissipation module for the display card, the fan cannot achieve a uniform heat dissipation effect when the rotation speed of the display card changes.

Understandably, the foregoing problems may also arise in other applications requiring heat dissipation. It is known that how to maintain the optimal heat dissipation efficiency when the heat source or the heat dissipation fan is dynamically changed is a challenge in the heat dissipation field.

Disclosure of Invention

In view of this, the present invention provides a fan module and a heat dissipation system including the same, which can maintain an optimal heat dissipation efficiency along with a dynamic change of a heat source.

According to an embodiment of the present invention, a fan module includes a fan body, a housing, and a cover. The shell part surrounds the fan body. The fan cover portion comprises at least one movable blade extending from the housing portion along a pivot axis of the fan body. The movable blade has a fixed end and a free end opposite to each other. The fixed end is fixed on the shell part. The free end is movable relative to the housing portion to vary a distance between the free end and the pivot axis.

According to another embodiment of the present invention, a heat dissipation system includes the fan module and a heat dissipation fin. The movable blade of the wind cover part is arranged between the shell part and the radiating fin.

In the fan module and the heat dissipation system including the same disclosed in the foregoing embodiments of the present invention, the housing portion surrounding the fan body is provided with the movable blade extending along the pivot axis of the fan body, and the free end of the movable blade is movable relative to the housing portion to change the distance between the movable blade and the pivot axis, so that, in practical applications, when the working temperature of the heat source is not too high yet, the heat source may be concentrated at a position where the heat dissipation fin corresponds to the center of the fan module, and under the condition that the fan module is operating at a low rotation speed, the generated airflow can be more intensively delivered to an area where the temperature of the heat dissipation fin is higher under the guidance of the movable blade, thereby allowing the airflow to effectively penetrate through the heat dissipation fin to achieve an expected heat dissipation efficiency; however, when the rotation speed of the fan module is increased along with the increase of the working temperature of the heat source, and the temperature of the whole heat dissipation fin is increased, the high wind pressure generated by the fan module can drive the movable blade to swing, so that the free end of the movable blade is relatively far away from the pivot axis, and therefore, the airflow can be guided by the movable blade to expand a larger area on the heat dissipation fin, the contact area between the airflow and the heat dissipation fin is increased, and the heat dissipation efficiency of the heat source is improved.

Therefore, the fan module can dynamically adjust the air flow guiding mode according to the rotating speed of the fan module through the movable blades of the wind cover part of the fan module, so that the optimal heat dissipation efficiency can be maintained along with the dynamic change of the heat source.

The foregoing description of the present disclosure and the following detailed description are presented to illustrate and explain the principles and spirit of the invention and to provide further explanation of the invention as claimed.

Drawings

Fig. 1 is a perspective view of a heat dissipation system according to an embodiment of the invention.

FIG. 2 is an enlarged partial side sectional view of the fan module of FIG. 1.

Fig. 3 is a schematic view illustrating the heat dissipation system of fig. 1 when the fan module is in a low rotation speed.

Fig. 4 is a schematic view illustrating the heat dissipation system of fig. 1 when the fan module is at a high rotation speed.

Fig. 5 is a perspective view of a heat dissipation system according to another embodiment of the invention.

FIG. 6 is an enlarged partial side sectional view of a fan module according to yet another embodiment of the present invention.

FIG. 7 is a schematic diagram of the fan module of FIG. 6 in use at a high speed.

Fig. 8 is a perspective view of a fan module according to yet another embodiment of the invention.

FIG. 9 is an enlarged partial side sectional view of the fan module of FIG. 8.

The reference numerals are explained below:

1a, 1b heat dissipation system

10a, 10b, 10c, 10d fan module

11 side of wind inlet

12 air outlet side

30 heat dissipation fin

110a, 110b, 110c, 110d housing

120 fan body

121 wheel valley

122 fan blade

130a, 130b, 130c, 130d wind shield

131 movable blade

132 fixed segment

111c inner layer structure

112c flexible outer layer structure

131d, 131c Movable vane

140 pivot

301 long side

302 short side

1102. 1102d groove

1311 fixed end

1312 free end

A gas flow

AX pivot axis

O air outlet

Detailed Description

The detailed features and advantages of the present invention are described in detail in the embodiments below, which are sufficient for any person skilled in the art to understand the technical contents of the present invention and to implement the same, and the related objects and advantages of the present invention can be easily understood by any person skilled in the art from the disclosure of the present specification, the claims and the accompanying drawings. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.

In addition, for the purpose of keeping the drawings clean, some conventional structures and elements may be shown in the drawings in a simplified schematic manner. In the drawings, some features of the present application may be slightly enlarged or changed in scale or size for the purpose of facilitating understanding and viewing of the technical features of the present invention, but this is not intended to limit the present invention.

Furthermore, the terms "end," "portion," "region," "place," and the like may be used hereinafter to describe a particular element or structure, or a particular feature thereon or therebetween, but are not limited to such terms. Terms such as "substantially", "about" and "approximately" may also be used hereinafter to describe a reasonable or acceptable amount of deviation that may exist between modified instances or events but which does not yet achieve the desired result.

Furthermore, unless otherwise defined, all words or terms used herein, including technical and scientific words and terms, have their ordinary meanings as will be understood by those of ordinary skill in the art.

First, referring to fig. 1, fig. 1 is a schematic perspective view of a heat dissipation system 1a according to an embodiment of the invention. The heat dissipation system 1a of the present embodiment can be configured in an electronic device such as a desktop computer or a notebook computer, and can be used to dissipate heat from a heat source such as a Graphics Processing Unit (GPU) or a Central Processing Unit (CPU). For the purpose of simplifying the drawings, the heat source applicable to the heat dissipation system 1a and the outer casing for fixing the heat dissipation system 1a are omitted and not shown, and the invention is not limited thereto.

In the present embodiment, the heat dissipation system 1a may at least include a fan module 10a and a heat dissipation fin 30, the fan module 10a is located at one side of the heat dissipation fin 30, and the structure for fixing the fan module 10a to the heat dissipation fin 30 is omitted for clarity of the structure of the fan module 10 a. The side of the heat sink 30 opposite to the fan module 10a can be used for thermally contacting a heat source (not shown) to absorb heat energy generated by the heat source during operation. The fan module 10a has an air inlet side 11 and an air outlet side 12 opposite to each other, and the air outlet side 12 of the fan module 10a faces the heat dissipation fins 30.

Further, in the present embodiment, the fan module 10a may at least include a housing portion 110a, a fan body 120, and a cover portion 130 a. The fan body 120 includes a hub 121(hub) and a plurality of blades 122, when the fan module 10a operates, the hub 121 can drive the blades 122 to rotate about a pivot axis AX to generate an airflow flowing from the air inlet side 11 to the air outlet side 12, wherein the form and material of the fan body 120 are not particularly limited and can be adjusted as required. The housing portion 110a surrounds the fan body 120, wherein the material of the housing portion 110a may also be adjusted according to the requirement, which is not limited in the present invention. Although the housing portion 110a of fig. 1 is annular, the shape of the housing portion 110a is not a limitation of the present invention; for example, in some other embodiments, the housing portion may also be square or other polygonal shape. The wind shield portion 130a may include a plurality of movable blades 131, the movable blades 131 extend from the housing portion 110a along the pivot axis AX toward the heat sink fins 30, and the movable blades 131 are disposed along the contour of the housing portion 110a, so that the movable blades 131 may form a ring structure or other geometric structures according to the contour of the housing portion 110 a. As shown in fig. 1, the movable blades 131 of the fan housing 130a are disposed between the housing 110a and the heat sink fins 30, so as to guide the airflow generated by the fan body 120 to the heat sink fins 30.

Further, referring to fig. 2 in conjunction with fig. 1, fig. 2 is a partially enlarged side sectional view of the fan module 10a of fig. 1. In the present embodiment, the movable blade 131 has a fixed end 1311 and a free end 1312 opposite to each other, the housing portion 110a has a plurality of grooves 1102, the fixed ends 1311 of the movable blade 131 can be respectively inserted into the grooves 1102 to fix the movable blade 131 on the housing portion 110a, wherein the fixed ends 1311 of the movable blade 131 can be, but are not limited to, fixed in the grooves 1102 of the housing portion 110a by a suitable method such as tight fitting or adhesive. The free ends 1312 of the movable blades 131 are closer to the heat dissipation fins 30 than the fixed ends 1311, and the free ends 1312 may surround the air outlet O of the fan module 10 a. In addition, in the present embodiment, each movable blade 131 may partially overlap with the adjacent movable blades 131, and such a configuration helps to improve the integrity of the space surrounded by the movable blades 131.

In addition, in the present embodiment, the movable blade 131 has high flexibility, and the flexibility thereof may be higher than that of the housing portion 110a, for example. Specifically, when the rotation speed of the fan body 120 is increased to increase the wind pressure to a certain degree, the wind pressure drives the movable blade 131 to deform. The material of the movable blade 131 is not particularly limited as long as the movable blade 131 can achieve the above purpose, and may be, for example, but not limited to, plastic, rubber, or other suitable materials.

Referring to fig. 3 to 4, fig. 3 is a schematic view illustrating the heat dissipation system 1a of fig. 1 when the fan module 10a is at a low rotation speed, and fig. 4 is a schematic view illustrating the heat dissipation system 1a of fig. 1 when the fan module 10a is at a high rotation speed. For the sake of simplicity, the term "rotation speed of the fan module" used below means "rotation speed of the fan body of the fan module".

As shown in fig. 3, when the operating temperature of the heat source (not shown) is not too high, the heat source may concentrate at the position of the heat sink fins 30 corresponding to the center of the fan module 10a, and the fan module 10a may operate at a lower speed, in which case, the wind pressure generated by the fan module 10a is not enough to deform the movable blades 131, so that the movable blades 131 of the hood portion 130a may be in the original state, and the airflow (the airflow a shown in the figure) generated by the fan module 10a is guided by the hood portion 130a and is more intensively delivered to the region with higher temperature of the heat sink fins 30, so that the airflow more effectively penetrates through the heat sink fins 30 to achieve the desired heat dissipation efficiency.

Next, as shown in fig. 4, when the operating temperature of the heat source (not shown) is increased and the fan module 10a gradually increases the rotation speed, the wind pressure generated by the fan module 10a is increased to a degree that the movable blade 131 is forced to deform, in which case the movable blade 131 of the wind shield portion 130a is driven by the wind pressure to bend outward, and the free end 1312 of the movable blade is relatively far away from the pivot axis AX of the fan module 10 a. The diameter of the air outlet O formed by the free end 1312 moving outward can be increased, so that the airflow a blown from the air outlet side 12 of the fan module 10a can be guided by the movable blades 131 to spread a wider area on the heat dissipating fins 30, and the increased airflow passes through a larger number of heat dissipating surfaces on the heat dissipating fins 30 to increase the contact area between the airflow and the heat dissipating fins 30, thereby increasing the heat dissipating efficiency of the heat source.

Therefore, the fan housing 130a of the fan module 10a can dynamically adjust the manner of guiding the airflow according to the rotation speed of the fan module 10a, so as to maintain the optimal heat dissipation efficiency with the dynamic change of the heat source.

Although the wind shield 130a is only formed by the movable blade 131 in the above embodiment, the invention is not limited thereto. For example, please refer to fig. 5, fig. 5 is a schematic perspective view of a heat dissipation system 1b according to another embodiment of the present invention, it should be noted that the main difference between the heat dissipation system 1b of fig. 5 and the heat dissipation system 1a of the foregoing embodiment is a wind hood portion, for the purpose of brief description, only the difference of the embodiments will be described below, and the same or similar portions can be understood by referring to the contents of the foregoing embodiments, and the same or similar features are denoted by the same reference numerals, and details thereof will not be repeated.

As shown in fig. 5, in the embodiment, the fan module 10b of the heat dissipation system 1b may include a housing portion 110b and a fan housing portion 130b, the fan housing portion 130b may include a plurality of movable blades 131 and at least one fixed section 132, the fixed section 132 and the movable blades 131 both extend from the housing portion 110b along the pivot axis AX of the fan module 10b, wherein the fixed section 132 is adjacent to the movable blades 131, and the movable blades 131 adjacent to the fixed section 132 may partially overlap the fixed section 132, such an overlapping configuration helps to improve the integrity of the space surrounded by the fan housing portion 130 b.

In addition, the flexibility of the fixed section 132 is at least lower than that of the movable blade 131, specifically, the fixed section 132 is not deformed by wind pressure generated by the rotation of the fan body 120. It should be noted that the fixed segment 132 may be fixed to the housing portion 110b in a manner similar or identical to the movable blade 131, or the fixed segment 132 may be integrally formed with the housing portion 110 b. On the other hand, in the present embodiment, the heat sink fins 30 are, for example, rectangular and have a long side 301 and a short side 302, and in configuration, the movable blade 131 of the wind shielding portion 130b corresponds to the short side 302 of the heat sink fins 30, and the fixed segment 132 of the wind shielding portion 130b corresponds to the long side 301 of the heat sink fins 30.

Thus, when the wind pressure of the fan module 10b is increased to force the movable blade 131 to deform, the airflow is guided by the deformed movable blade 131 to flow to the portion of the heat dissipation fin 30 that is not overlapped with the fan module 10a, so as to achieve the effect of increasing the contact area between the airflow and the heat dissipation fin 30 as described in the foregoing embodiment; at this time, the fixing section 132 still maintains the original shape due to the material characteristics thereof, which is helpful for reducing the amount of the air flow flowing to the space outside the long sides 301 of the heat dissipation fins 30, so that the air flow can be effectively utilized to avoid reducing the heat dissipation efficiency of the fan module 10a to the heat dissipation fins 30.

Therefore, the arrangement of the movable blades and the fixed segments on the fan module can be determined according to the configuration of the heat dissipation fins, so as to improve the utilization rate of the airflow, so that the airflow generated by the fan module 10b having a circular structure or a shape different from that of the heat dissipation fins can be uniformly distributed on the heat dissipation fins 30 having a rectangular structure, thereby increasing the heat dissipation effect.

In addition, the assembly manner of the movable blade and the housing portion in the foregoing embodiment is only one example of the present invention, and the present invention is not limited thereto. For example, please refer to fig. 6 to 7, wherein fig. 6 is a partially enlarged side sectional view of a fan module 10c according to another embodiment of the present invention, and fig. 7 is a schematic use view of the fan module 10c of fig. 6 at a high rotation speed. It should be noted that the main difference between the fan module 10c of fig. 6 to 7 and the fan module of the foregoing embodiment lies in the assembly of the wind cover portion and the housing portion, and for the purpose of brief description, only the differences between the embodiments are described below, and the same or similar portions can be understood by referring to the contents of the foregoing embodiments, and the same or similar features are denoted by the same reference numerals, and details thereof will not be repeated.

As shown in fig. 6, in the present embodiment, the fan module 10c includes a housing portion 110c and a wind shield portion 130c, wherein the housing portion 110c includes an inner layer structure 111c and a flexible outer layer structure 112c, and the wind shield portion 130c includes a plurality of movable blades 131 c. Specifically, the inner layer structure 111c and the flexible outer layer structure 112c can be both annular or other geometric structures, wherein the flexible outer layer structure 112c is sleeved on the inner layer structure 111 c. The fixed end 1311 of the movable blade 131c is integrally connected to the flexible outer layer structure 112c, wherein the movable blade 131c has high flexibility, like the flexible outer layer structure 112c, and is made of rubber, for example.

Next, as shown in fig. 7, when the wind pressure of the fan module 10c is increased to force the movable blade 131c to deform, the flexible outer layer structure 112c connected to the movable blade 131c can be interlocked to deform. When the wind pressure of the fan module 10c decreases with the decrease of the rotation speed, the deformed flexible outer layer structure 112c can automatically and elastically reset due to the material property thereof, thereby driving the movable blade 131c connected thereto to return to the position as shown in fig. 6. It can be seen that the flexible outer layer structure 112c helps to reposition the movable blade 131 c.

In addition, it should be noted that the single structure formed by the flexible outer layer structure 112c and the movable blade 131c can also be regarded as a kit, so that the user can selectively sleeve on other suitable fan modules, and the best heat dissipation effect can be maintained and provided in coordination with the dynamic change of the heat source as described above.

Alternatively, please refer to fig. 8 to 9 to describe another example of the assembly of the wind cowl portion and the housing portion of the present invention, wherein fig. 8 is a perspective view of a fan module 10d according to yet another embodiment of the present invention, and fig. 9 is a partially enlarged side sectional view of the fan module 10d of fig. 8. It should be noted that the main difference between the fan module 10c of fig. 8-9 and the fan module of the foregoing embodiment is the assembly of the wind cover portion and the housing portion, and for the purpose of brief description, some components in fig. 8-9 are shown by dashed lines or simplified manner, and only the difference between the embodiments will be described below, and the same or similar parts can be understood by referring to the contents of the foregoing embodiments, and the same or similar features are denoted by the same reference numerals, and details thereof will not be repeated.

As shown in fig. 8 and 9, in the present embodiment, the fan module 10d includes a housing portion 110d, a hood portion 130d, and a plurality of pivots 140, wherein the hood portion 130d includes a plurality of movable blades 131d, the pivots 140 can be embedded in the grooves 1102d of the housing portion 110d and are substantially perpendicular to the pivot axis AX of the fan body 120, and the fixed ends 1311 of the movable blades 131d are respectively pivoted to the pivots 140, so as to be pivotally disposed on the housing portion 110 d. It is noted that the groove 1102d is sized to allow the movable blade 131d to rotate a specific amount relative to the housing portion 110 d.

When the wind pressure of the fan module 10d increases with the rotating speed, the movable blade 131d is forced to pivot relative to the housing 110d (as shown by the arrow in fig. 9), so as to achieve the effect of diffusing the airflow outwards as in the previous embodiment. When the wind pressure of the fan module 10d is decreased as the rotational speed is decreased, the movable blade 131d can naturally return to the original position by using gravity. It can be seen that the fan module 10d can also provide the best heat dissipation effect in coordination with the dynamic variation of the heat source as described above. It should be noted that, a torsion spring (not shown) may be optionally disposed between the movable blade 131d and the pivot 140 to assist the return of the movable blade 131d, but the invention is not limited thereto. In addition, although the movable blade 131d and the pivot 140 are independent components, the invention is not limited thereto, for example, in other embodiments, the movable blade and the pivot may be integrated, in which case, a shaft hole may be additionally formed on the housing for the pivot to pivot together with the movable blade and the pivot relative to the housing.

Finally, it should be added that the adjacent movable blades of the foregoing embodiments can overlap each other at low wind pressure, but the invention is not limited thereto; for example, in other embodiments, the movable vanes may be arranged in an adjacent, non-overlapping manner. In addition, the number, shape, length or size of the movable blades of the fan module can be adjusted according to actual requirements, and the invention is not limited thereto. For example, in some other embodiments, the fan module may also include only a single movable blade, and the movable blade may be changed to other geometries.

Although the present invention has been described with reference to the above embodiments, it is not intended to limit the invention. All changes and modifications that come within the spirit and scope of the invention are desired to be protected by the following claims. With regard to the scope of protection defined by the present invention, reference should be made to the appended claims.

Claims

1. A fan module, comprising:

a fan body;

a housing portion surrounding the fan body; and

and the wind cover part comprises at least one movable blade which extends from the shell part along a pivot axis of the fan body, wherein the at least one movable blade is provided with a fixed end and a free end which are opposite to each other, the fixed end is fixed on the shell part, and the free end can move relative to the shell part to change the distance between the free end and the pivot axis.

2. The fan module as claimed in claim 1, wherein the number of the at least one movable blade of the cover portion is plural, the plural movable blades are disposed along the housing portion, and the plural free ends of the plural movable blades constitute an air outlet of the fan module.

3. The fan module as claimed in claim 1, wherein the fan body is an axial fan.

4. The fan module as claimed in claim 1, wherein the fixed end of the at least one movable blade of the hood portion is embedded in a groove of the housing portion.

5. The fan module as claimed in claim 1, wherein the housing portion includes an inner layer structure and a flexible outer layer structure, the flexible outer layer structure is disposed on the inner layer structure, and the at least one movable blade of the cover portion is connected to the flexible outer layer structure.

6. The fan module as claimed in claim 5, wherein the at least one movable blade of the shroud portion is integrally formed with the flexible outer structure.

7. The fan module as claimed in claim 1, wherein the at least one movable blade of the shroud portion is pivotally connected to the housing portion, and a pivot of the at least one movable blade is perpendicular to the pivot axis of the fan body.

8. The fan module as claimed in claim 1, wherein the at least one movable blade of the shroud portion has a higher flexibility than the housing portion.

9. A heat dissipation system, comprising:

the fan module of claim 1; and

the at least one movable blade of the wind cover part is arranged between the shell part and the heat dissipation fins.

10. The heat dissipating system of claim 9, wherein the heat dissipating fins have a long side and a short side, the housing further comprises at least one fixed section extending from the housing along the pivot axis of the fan body and adjacent to the at least one movable blade, the at least one movable blade of the housing corresponding to the short side of the heat dissipating fins, and the at least one fixed section corresponding to the long side of the heat dissipating fins.