TWI468912B - Heat dissipating device - Google Patents

Description

Heat sink

The invention relates to a heat dissipating device, in particular to a heat dissipating device for dissipating heat of electronic components.

The heat dissipating device is widely used in a notebook computer. The commonly used heat dissipating device generally includes a heat absorbing plate, a heat pipe and a heat dissipating fin group formed by stacking the heat dissipating fins, and the heat absorbing plate is attached to a heat generating electronic component disposed on the circuit board. The heat generated by the heat-generating electronic component is absorbed, and the heat is transferred to the heat pipe, and is transmitted to the heat-dissipating fin group through the heat pipe, and the heat is radiated by the heat-dissipating fin group. Notebook computers tend to be compact in design, which requires a smaller heat sink and better heat dissipation.

In view of this, it is necessary to provide a heat sink having a smaller volume and better heat dissipation.

A heat dissipating device includes a heat dissipating fin group, a heat pipe and a centrifugal fan, the heat dissipating fin group is formed by stacking a plurality of heat dissipating fins, the centrifugal fan is provided with an air outlet, and the heat dissipating fin group is disposed at an air outlet of the centrifugal fan The heat pipe is in contact with the heat sink fin group, and the height of at least a portion of the heat dissipation fins of the heat dissipation fin group is gradually decreased along a stacking direction of the heat dissipation fin group, and each of the at least some of the heat dissipation fins includes a body. An upper folded edge integrally bent from a side edge of the upper body and extending in a horizontal direction, and a lower folded edge integrally bent by the lower side edge of the body and extending upwardly, the at least one of the at least one of the heat dissipation fins The upper and lower flanges of the heat dissipation fin respectively abut against the body of the first heat dissipation fin, and the at least part of the heat dissipation fins are folded on the same horizontal surface and Cooperating to form a horizontally extending top surface, wherein at least a portion of the lower fins of the heat dissipating fins are on the same upwardly inclined plane and together form an upwardly inclined bottom surface, and the bottom of the heat dissipating fin group is disposed at a corresponding reduced height The fins form a void space.

Compared with the prior art, the height of at least some of the heat dissipation fins of the heat dissipation fin assembly of the present invention gradually decreases along the stacking direction of the heat dissipation fin group, so that the heat dissipation fins are disposed at the corresponding reduced height heat dissipation fins. The sheet forms a vacant space to accommodate other components of the notebook computer, making the internal structure of the notebook more compact.

10, 20‧‧‧ heat sink

11, 21‧‧‧ centrifugal fan

12, 22‧‧‧ heat pipe

13‧‧‧Part 1

14, 14a, 14b, 14c, 16, 16a, 16b, 16c‧‧‧ heat sink fins

15‧‧‧Part II

17‧‧‧Air passage

100, 100a‧‧‧Fixing fin set

110‧‧‧Top

111‧‧‧ bottom

112‧‧‧Air inlet

113‧‧‧ side wall

114, 214‧‧ vents

121‧‧‧ top surface

122, 222‧‧‧ bottom end

123, 223‧‧ ‧ Condensation section

140, 160‧‧‧ ontology

141,161‧‧‧Upper fold

142, 162‧‧‧ hem

148, 168, 248‧‧‧ top

149, 249‧‧‧ bottom

1 is a perspective assembled view of a preferred embodiment of a heat sink of the present invention.

2 is a front view of the heat sink fin set of FIG. 1.

3 is a perspective assembled view of still another preferred embodiment of the heat sink of the present invention.

4 is a front view of the heat sink fin set of FIG. 3.

As shown in FIGS. 1 and 2, the heat sink 10 includes a centrifugal fan 11, a heat pipe 12, and a heat sink fin set 100. The top end 110 and the bottom end 111 of the centrifugal fan 11 are provided with an air inlet 112, and the side wall 113 of the centrifugal fan 11 defines an air outlet 114. The heat pipe 12 is a flat heat pipe. The top end surface 121 and the bottom end surface 122 of the heat pipe 12 are flat, and the condensation section 123 of the heat pipe 12 is located at the top end of the air outlet 114 of the centrifugal fan 11.

The heat dissipation fin group 100 is linearly stacked and disposed at the air outlet 114 of the centrifugal fan 11. The heat dissipation fin group 100 is divided into a first portion 13 and a second portion 15 adjacent to each other in the stacking direction, and the first portion 13 is located in the heat dissipation fin group. On the left side of 100, the second portion 15 is located on the right side of the heat dissipation fin set 100.

The first portion 13 is formed by stacking a plurality of first heat dissipation fins 14, and the first two adjacent ones are dispersed. An air flow passage 17 is formed between the heat fins 14. The first portion 13 has a trapezoidal shape, and the height of each of the first heat dissipation fins 14 gradually decreases along the stacking direction of the first portion 13. The first heat dissipation fin 14 includes a body 140, an upper flange 141 and a lower flange 142. The upper flange 141 is integrally bent by the upper edge of the body 140 and extends in the horizontal direction, and the lower flange 142 is formed by the body 140. The lower side edge is integrally bent and extended obliquely upward. The upper edge 141 and the lower edge 142 of the first heat dissipation fin 14a respectively abut against the body 140 of the first first heat dissipation fin 14b, and the upper first heat dissipation fins 14 have the same hem 141 The top surface 148 of the first portion 13 is formed on the horizontal surface, and the lower flanges 142 of the plurality of first heat dissipation fins 14 are on the same upwardly inclined plane and together constitute the bottom surface 149 of the first portion 13. The top surface 148 is a horizontal plane that extends obliquely upward along the stacking direction of the first portion 13.

The second portion 15 is formed by stacking a plurality of second heat dissipation fins 16 , and an air flow passage 17 is formed between the adjacent two second heat dissipation fins 16 . The second portion 15 has a rectangular shape, and the heights of the second heat dissipation fins 16 are the same. The second heat dissipation fin 16 includes a body 160, an upper flange 161 and a lower flange 162. The upper flange 161 and the lower flange 162 are respectively horizontally extended from the upper and lower edges of the body 160. The upper edge 161 and the lower edge 162 of the second heat dissipation fin 16a respectively abut against the body 160 of the first second heat dissipation fin 16b, and the upper edge 161 of the plurality of second heat dissipation fins 16 are in the same The top surface 168 of the second portion 15 is formed on the horizontal surface, and the lower surface 162 of the second heat dissipation fin 16 is on the same horizontal surface and together constitutes the bottom surface 169 of the second portion 15, and the top surface 168 and the bottom surface 169 are both flat.

The first portion 13 and the second portion 15 are located at the air outlet 114 of the centrifugal fan 11, the first portion 13 and the second portion 15 are lined up and the top surface 148 of the first portion 13 is on the same level as the top surface 168 of the second portion 15. The top surface 148 and the second portion of the first portion 13 The top surface 168 of the sub-section 15 is attached to the bottom end surface 122 of the condensation section 123 of the heat pipe 12. The bottom surface 149 of the first portion 13 is joined to the bottom surface 169 of the second portion 15.

The first heat radiating fin 14c at the rightmost end of the first portion 13 is adjacent to the second heat radiating fin 16c at the leftmost end of the second portion 15. The first heat dissipation fins 14c are the same height as the second heat dissipation fins 16c, and the upper heat dissipation fins 16c are disposed on the upper edge of the body 140 of the first heat dissipation fins 14c, and the second heat dissipation fins 16c. The lower flange 162 abuts against the lower side edge of the body 140 of the first heat dissipation fin 14c. Except for the first heat dissipation fins 14c, the heights of the other first heat dissipation fins 14 are smaller than the height of the second heat dissipation fins 16c, and along the stacking direction away from the second heat dissipation fins 16c, the first heat dissipation fins The height of the sheet 14 is gradually smaller.

Heat is transferred from the condensation section 123 of the heat pipe 12 to the first portion 13 and the second portion 15 of the heat dissipation fin set 100, and the centrifugal fan 11 generates an air flow and blows the first portion 13 and the second portion 15, the air flow by the first portion 13 and the first portion The air flow passages 17 of the two portions 15 radiate heat from the first portion 13 and the second portion 15 to the outside air.

The height of the first portion 13 gradually decreases along the stacking direction of the first portion 13, so that the bottom portion of the first portion 13 forms a vacant space 200 to accommodate other components of the notebook computer, preventing the heat sink fin set 100 from interfering with other components of the notebook computer. To adapt to the complex space structure inside the notebook, and make the internal space of the notebook more compact. In addition, since the bottom surface 149 of the first portion 13 is a sloped surface, in the same specification, the bottom surface 149 has an area of the inclined surface which is larger than the area of the bottom surface 149 as a horizontal plane, which can increase the heat dissipation area of the first portion 13, that is, the first portion 13 is reduced. The heat dissipation performance can be maintained even in the case of volume.

3 and 4 illustrate a heat sink 20 according to another preferred embodiment of the present invention, which differs from the previous preferred embodiment in that the heat sink fin set 100a is not divided into two parts. The height of all the heat dissipation fins 24 of the heat dissipation fin group 100a decreases from right to left along the stacking direction of the heat dissipation fin group 100a, and the top surface 248 of the heat dissipation fin group 100a is attached to the bottom end surface of the condensation section 223 of the heat pipe 22. 222. The bottom surface 249 of the heat dissipation fin group 100a is a sloped surface to form a void space 200a.

In summary, the present invention conforms to the requirements of the invention patent, and proposes a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧heating device

11‧‧‧ Centrifugal fan

12‧‧‧ Heat pipe

13‧‧‧Part 1

15‧‧‧Part II

100‧‧‧Fixing fin set

110‧‧‧Top

111‧‧‧ bottom

112‧‧‧Air inlet

113‧‧‧ side wall

114‧‧‧air outlet

121‧‧‧ top surface

122‧‧‧ bottom end

123‧‧‧Condensation section

Claims (7)

A heat dissipating device includes a heat dissipating fin group, a heat pipe and a centrifugal fan, the heat dissipating fin group is formed by stacking a plurality of heat dissipating fins, the centrifugal fan is provided with an air outlet, and the heat dissipating fin group is disposed at an air outlet of the centrifugal fan The heat pipe is in contact with the heat sink fin group, and the improvement is that the height of at least part of the heat dissipation fins in the heat dissipation fin group gradually decreases along the stacking direction of the heat dissipation fin group, and each of the at least some of the heat dissipation fins is The utility model comprises a body, an upper folded edge which is integrally bent from a side edge of the upper body and extends in a horizontal direction, and a lower folded edge which is integrally bent by a lower side edge of the body and obliquely extended upward, the at least part of the heat dissipation fin The upper and lower folded edges of the rear heat dissipating fins respectively abut against the body of the first heat dissipating fin, and the at least part of the heat dissipating fins are folded on the same horizontal surface and together form a horizontal extension. a top surface, the at least a portion of the lower fins of the heat dissipating fins are on the same upwardly inclined plane and together form an upwardly inclined bottom surface, and the bottom of the heat dissipating fin group is formed by a heat sink fin corresponding to the reduced height A vacant space. The heat dissipating device of claim 1, wherein the heat dissipating fin component is disposed adjacent to the first portion and the second portion, and the height of each of the heat dissipating fins of the first portion gradually decreases along the stacking direction, and each of the second portion The heights of the heat dissipation fins are the same, and the heights of the heat dissipation fins of the first portion are not greater than the height of any one of the heat dissipation fins of the second portion. The heat dissipating device of claim 2, wherein the heat pipe is flat, the flat heat pipe has a bottom end plane, and the first portion and the second portion of the heat dissipating fin group are arranged in a row and have a horizontal top surface. The bottom end plane of the heat pipe is attached to the top surface of the heat dissipation fin group. The heat dissipation device of claim 3, wherein the first portion of the heat dissipation fin set has a sloped bottom surface, and the second portion of the heat dissipation fin group has a horizontal bottom surface, and the bottom surface of the first portion of the heat dissipation fin group Connected to the bottom surface of the second portion of the heat sink fin set. The heat dissipation device of claim 3, wherein the first part of the heat dissipation fin set has a first heat dissipation fin adjacent to the second portion of the heat dissipation fin set, the second portion of the heat dissipation fin group having a second heat dissipation fin adjacent to the first portion of the heat dissipation fin group, the first heat dissipation fin and the second The fins have the same height. The heat dissipating device of claim 1, wherein the heat pipe is flat, the flat heat pipe has a bottom end plane, the heat dissipation fin group has a horizontal top surface, and the bottom end plane of the heat pipe is attached to the heat dissipation fin On the top of the group. The heat dissipation device of claim 1, wherein the height of all the heat dissipation fins of the heat dissipation fin group gradually decreases along the stacking direction of the heat dissipation fin group.