TWI621781B - Combined fan and cooling system using the same - Google Patents

Abstract

A composite fan blade adapted to cool a heat source, comprising a hub and a plurality of blades. The hub has a first side and a second side opposite to each other. Each of the blades is disposed on an outer circumferential surface of the hub and includes a first portion extending from the hub and a second portion coupled to the first portion, wherein each of the second portions protrudes from the first side or the second portion The side faces, and each of the second portions is a plurality of strip structures. Thereby the strip structures are brought closer to the surface of the heat source to drive the heat away more efficiently.

Description

Composite fan blade and its heat sink

The invention relates to a fan blade and a heat dissipating device thereof, in particular to a composite fan blade and a heat dissipating device thereof which are combined with a strip structure to be closer to a heat source.

In recent years, with the development of the electronics industry, the performance of electronic components has been continuously improved, the computing speed has become faster and faster, the computing speed of the internal chipset has been continuously increased, the number of wafers has been increasing, and the amount of heat emitted by the wafers has increased accordingly. If the heat is not dissipated in time, the performance of the electronic components will be greatly affected, and the operation speed of the electronic components will be lowered. As the heat is accumulated, the electronic components may be burnt, and therefore the electronic components must be dissipated.

In an electronic device with limited installation space, such as a desktop computer or a notebook computer, a fan device is usually installed in the vicinity of the electronic component, and the airflow generated by the fan blade rotation in the fan device is directly blown to the electronic component or mounted on the electronic device. A heat sink on the electronic component to effectively dissipate heat from it. The conventional fan structure generally includes a hub and a plurality of blades formed by extending outwardly from the hub, and the blades are inclined in the same hour hand direction. Since the size of the airflow generated by the fan device depends on the rotational speed of the blade, it depends on the swept area of the blade and the angle of the blade.

However, the existing fan blade area or blade angle design still cannot effectively improve the heat dissipation capability. In view of the above, the inventors of the present invention have made great efforts to solve the above problems in view of the above-mentioned prior art, and have made great efforts to solve the above problems, which has become the object of improvement of the present inventors.

One of the objects of the present invention is to provide a composite fan blade and a heat dissipating device which are combined with a strip structure to be closer to the surface of the heat source, thereby more effectively driving the heat away.

To achieve the above object, the present invention provides a composite fan blade adapted to cool a heat source including a hub and a plurality of blades. The hub has a first side and a second side opposite to each other. Each of the blades is disposed on an outer circumferential surface of the hub and includes a first portion extending from the hub and a second portion coupled to the first portion, wherein each of the second portions protrudes from the first side or the second portion The side faces, and each of the second portions is a plurality of strip structures.

In order to achieve the above object, the present invention further provides a heat dissipating device adapted to cool a heat source, comprising a composite fan blade as in the foregoing embodiment and a casing. The housing houses the composite blades, and the second portions are disposed in the direction of the heat source.

The invention also has the following effects: each blade utilizes the second portion (i.e., each strip structure) to be flexible with respect to the first portion to be closer to the heat source to more effectively sweep away the waste heat of the heat source. Each strip structure may be separately attached and protruded beyond one side of each blade (ie, the first portion), or may be combined with a joint portion to integrate the strip structures into a bristle device, which is easier to assemble. On the side of each blade.

100‧‧‧Composite fan blades

110‧‧·wheels

112‧‧‧ shaft

114‧‧‧ Groove

120‧‧‧ first side

130‧‧‧ second side

140‧‧‧ outer circumferential surface

150‧‧‧ blades

160‧‧‧ first part

170‧‧‧Part II

180‧‧‧ strip structure

190‧‧‧Brushing device

192‧‧‧Combination Department

200‧‧‧ Heat sink

210‧‧‧heat source

212‧‧‧ circuit board

220‧‧‧shell

230‧‧‧ first shell

240‧‧‧ second casing

250‧‧‧suspension shaft

260‧‧‧ air inlet

270‧‧ vents

D‧‧‧ gap

1 is a perspective view showing a composite fan blade according to a first embodiment of the present invention.

2 is a perspective view showing a composite fan blade according to another embodiment of the present invention.

3 is an exploded perspective view showing the composite fan blade of the first embodiment applied to a heat dissipating device according to the present invention.

4 is a cross-sectional view showing the application of the composite blade of the first embodiment to a heat sink according to the present invention.

FIG. 5 is an exploded perspective view showing the application of the composite fan blade to the heat sink according to the second embodiment of the present invention.

FIG. 6 is a perspective view showing a composite fan blade according to still another embodiment of the present invention.

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

As shown in FIGS. 1 and 2, the present invention provides a composite blade 100 comprising a hub 110 and a plurality of blades 150. The hub 110 has a first side 120 and a second side 130 opposite to each other. Each of the blades 150 is equally or unevenly distributed on the outer circumferential surface 140 of the hub 110 and includes a first portion 160 extending from the hub 110 and a second portion 170 coupled to the first portion 160 Each of the second portions 170 protrudes from the first side 120 or the second side 130, and each of the second portions 170 preferably has a plurality of strip structures 180.

In the present embodiment, each of the blades 150 is preferably formed by extending at an angle and linearly extending in the same rotational direction, and can be applied to the centrifugal fan blade. Each of the vanes 150 may also be curved outwardly from the outer circumferential surface 140 of the hub 110, or may be applied as an axial flow vane, as shown in FIG. however In other various embodiments, each of the blades 150 may also be a radially extending linear extension, a curved curved extension, or other form of blade, and is not limited.

In the embodiment shown in FIG. 1 and FIG. 2, the hub 110 further has a rotating shaft 112 and a recess 114. One end of the rotating shaft 112 is preferably connected to the bottom surface of the second side surface 130 and disposed at the center of the recess 114. Therefore, each of the second portions 170 preferably protrudes in the opposite direction to the opening of the recess 114, that is, protrudes outward from the second side surface 130. However, in another exemplary embodiment, one end of the rotating shaft 112 may also be connected to the bottom surface of the first side surface 120 such that the second portion 170 protrudes beyond the first side surface 120, as needed.

In addition, the material of each strip structure 180 of each second portion 170 preferably includes, but is not limited to, graphite, metal or any other heat conductive flexible material. The shape of each strip structure 180 also includes, but is not limited to, graphite wire, copper wire, aluminum wire or alloy wire thereof, and the like. The rigidity of each of the first portions 160 belonging to the body of the blade 100 is preferably greater than the rigidity of the second portions 170, that is, the flexibility of each of the second portions 170 is greater than the first portions 160, so that the strip structure 180 The ability to rotate with the blade 100 and to deform relative to the first portion 160 can increase the effect of sweeping.

In the embodiment shown in FIG. 1, a plurality of bristle devices 190 are further included, each bristle device 190 being coupled to each of the second portions 170 and attached to one of the sides of each of the vanes 150, respectively. Each bristle device 190 also includes a joint 192 of the same or different metallic material as each strip structure 180 to securely secure the strip structures 180. In order to accelerate the heat dissipation effect, the first portion 160 material may be the same or different heat conductive material as the material of each bristle device 190, such as copper, silver, aluminum or an alloy thereof, as needed or designed. However, in the embodiment shown in FIG. 2, each of the second portions 170 may also be directly attached to one of the sides of each of the vanes 150, as needed.

Moreover, in another exemplary embodiment, each of the first portions 160 may also be integrally formed with each of the second portions 170. Alternatively, in another exemplary embodiment, each of the second portions 170 may be formed in an Insert Molding manner with each of the first portions 160, as needed.

As shown in FIG. 3 and FIG. 4, an exploded and cross-sectional view of the composite fan blade of the first embodiment of the present invention assembled to the heat sink is applied. As shown, the present invention further provides a heat dissipating device 200 adapted to cool a heat source 210, including a composite blade 100 and a housing 220 as in the previous embodiments. The composite blade 100 is housed in the housing 220, and each of the second portions 170 is disposed in the direction of the heat source 210.

In the present embodiment, the housing 220 is preferably made of a metal material having a high thermal conductivity, such as iron, aluminum or an alloy thereof. The housing 220 further includes a first outer casing 230 and a second outer casing 240 that is overlapped with the first outer casing 230. The first outer casing 230 has a suspension shaft 250 and at least one air inlet 260. When the first outer casing 230 covers the second outer casing 240, an air outlet 270 is formed on one side of the casing 220 such that the direction of the at least one air inlet 260 is perpendicular to the direction of the air outlet 270, so the composite fan of the embodiment The leaf 100 is preferably a centrifugal flow fan.

The hub 110 of the composite blade 100 has a shaft 112 assembled with the suspension shaft 250 and a recess 114 for receiving the stator (not shown). One end of the rotating shaft 112 is preferably connected to the bottom surface of the second side surface 130 and disposed at the center of the groove 114 to rotate the composite blade 100 relative to the housing 220 with the suspension shaft 250 as an axis.

As shown in FIG. 4, when the heat sink 200 is attached to a surface of the heat source 210 electrically connected to the circuit board 212, that is, the second housing 240 is attached to the surface of the heat source 210 of the heat source 210, wherein each of the second Portions 170 (i.e., strip structures 180) are disposed in the direction of heat source 210. When the heat sink 200 is in operation, in addition to the wind flow generated by the rotation of the blades 150, the strips 180 are added to bring the waste heat out more quickly and efficiently with the surface closest to the heat source 210. The tuyere 270 is discharged.

In this embodiment, each of the second portions 170 preferably does not contact the inner surface of the second outer casing 240 of the casing 220, that is, a very small one between the strip structures 180 and the inner surface of the second outer casing 240. The gap D, therefore, does not contact the inner surface of the second outer casing 240, so that no noise, wear or other interference is generated. However, in other exemplary embodiments, since each of the second portions 170 is a flexible material, each of the second portions 170 may also contact the inner surface of the second outer casing 240 of the casing 220, and the same effects as described above can be achieved.

FIG. 5 is an exploded perspective view of a heat sink according to a second embodiment of the present invention. In this embodiment, the single housing 220 includes at least one air inlet 260 and one air outlet 270, wherein the air outlet 270 is disposed corresponding to the at least one air inlet 260 to make the composite fan blade having the curved curved blades 150 100 can be attached to the suspension shaft 250 of the housing 220 from the air outlet 270. Therefore, the composite blade 100 of the present embodiment is preferably an axial flow fan.

When the heat sink 200 of the present embodiment is disposed adjacent to the surface of the heat source (not shown), the strip structures 180 may be disposed more directly toward the heat source 210. Similarly, when the heat sink 200 is in operation, each strip structure 180 on the axial flow fan blade 100 can discharge the waste heat of the heat source 210 from the air outlet 270 in the surface closest to the heat source 210, thereby improving heat dissipation. effect.

In addition, in the embodiment of FIG. 5, each second portion 170 also has a very small gap D between the heat source (not shown) so that the strip structures 180 do not contact the surface of the heat source. So as to avoid noise or wear. Of course, in other exemplary embodiments, since each of the second portions 170 is a flexible material, each of the second portions 170 may also contact the surface of the heat source, as needed.

6 is a perspective view of a composite fan blade according to still another embodiment of the present invention. As shown in FIG. 6, the second portion 170 can be disposed outside the first portion 160 in addition to the direction of the heat source. The second portion 170 is preferably combined with the first portion 160 in a buried manner. For other structures and connection relationships of the second portion 170 of this embodiment, refer to the foregoing, and details are not described herein again.

Therefore, each of the blades 150 of the present invention can be closer to the heat source 210 by utilizing the flexibility of each of the second portions 170 (ie, the strip structures 180) relative to the first portion 160 to more effectively sweep away the heat source 210. Waste heat. Moreover, each strip structure 180 can be separately attached and protruded beyond one side of each blade 150 (ie, the first portion 160), or a joint portion 192 can be combined to form each strip structure 180 into one. The bristle device 190 can therefore be more easily assembled on the side of each blade 150.

In the above, the embodiments disclosed herein are to be considered as illustrative of the invention and not to limit the invention. The scope of the present invention is defined by the scope of the appended claims, and the legal equivalents thereof are not limited to the foregoing description.

Claims (9)

A heat dissipating device adapted to cool a heat source, comprising: a composite fan blade, comprising: a hub having an opposite first side and a second side; and a plurality of blades, each of the blades being distributed on the hub The outer circumferential surface, each of the segments includes a first portion extending from the hub and a second portion coupled to the first portion, wherein each of the second portions protrudes from the first side or the a second side, and each of the second portions is a plurality of strip structures; and a housing accommodating the composite fan blades, and each of the second portions is disposed in a direction of the heat source. The heat dissipating device of claim 1, wherein the housing further comprises a first outer casing, a second outer casing covering the first outer casing, and an air outlet, the first outer casing having a suspension shaft and at least An air inlet, the direction of the at least one air inlet is perpendicular or opposite to the direction of the air outlet. The heat dissipating device of claim 1, wherein a side of the housing is further attached to a surface of the heat source, each of the strip structures being capable of contacting or not contacting the surface of the housing or the heat source. When the strip structure does not contact the surface of the housing or the heat source, each strip structure has a gap between the strip or the surface of the heat source. The heat dissipating device of claim 1, wherein the material of the strip structure comprises graphite or metal. The heat dissipating device of claim 1, wherein the rigidity of each of the first portions is greater than the rigidity of each of the second portions. The heat sink of claim 1, wherein each of the first portions is integrally formed with each of the second portions. The heat dissipating device of claim 1, wherein each of the second portions and each of the first portions are formed in a buried manner. The heat dissipating device according to claim 1, further comprising a plurality of bristle devices, each of the bristle devices being coupled to each of the second portions and attached to one of the side faces of each of the blades. The heat dissipating device of claim 8, wherein each of the bristle devices further comprises a joint to jointly fix the strip structures.