CN101662918B - Heat radiating device - Google Patents

Abstract

The invention relates to a heat radiating device which comprises a heat radiator and a fan combined with the heat radiator, wherein a positioning groove is formed at the top end of the heat radiator, an accepting space is formed in the middle of the top of the heat radiator, a card slot communicated with the accepting space is arranged on the heat radiator, the fan comprises a fan frame and impellers arranged on the fan frame, the impellers are contained in the accepting space, the fan frame outwards and convexly extends to form a positioning part, the fan frame downwards extends to form a fixed arm, a hook part is arranged at the free end of the fixed arm, the hook part is matched with the card slot, and the positioning part is contained in the positioning groove to together fix the fan onto the heat radiator. The heat radiating device is convenient to assemble, can avoid the fan from rotating and can improve the heat radiating efficiency.

Description

heat sink

technical field

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

Background technique

With the rapid development of the electronic industry, the high-speed, high-frequency and integration of electronic components (such as central processing units) make the calorific value increase dramatically. In order to efficiently remove the heat generated by electronic components in a limited space, the industry usually uses Install a cooling device on the electronic component.

The heat dissipation device usually includes a heat sink and a fan. The heat sink is used for thermal contact with the electronic components. The heat transferred to the radiator is dissipated to the surrounding air, thereby achieving the purpose of heat dissipation. However, in the above heat dissipation device, since the fan needs to be locked on the outside of the heat sink by means of four-corner locking screws, the assembly process is cumbersome, which is not conducive to cost saving. Therefore, need to improve.

Contents of the invention

In view of this, it is necessary to provide a cooling device that facilitates the assembly of the fan and the radiator.

A heat dissipation device, comprising a radiator and a fan combined with the radiator, a positioning groove is formed on the top of the radiator, and a storage space is formed in the middle of the top of the radiator, and a fan communicating with the storage space is formed on the radiator. The fan includes a fan frame and an impeller arranged on the fan frame, the impeller is accommodated in the accommodating space, the fan frame protrudes outward from the positioning part, and the fan frame extends downward to form a The fixed arm is provided with a hook at the free end of the fixed arm, and the hook is matched with the slot, and the positioning part is accommodated in the positioning groove to jointly fix the fan on the radiator.

A heat dissipation device, including a radiator and a fan combined with the radiator, the radiator includes a plurality of fins, the fins include a body and an extension formed by extending upward from the body, and the width of the extension is smaller than that of the body Width, wherein the extension part of a part of the fins protrudes from the extension part of the other part of the fins to form a positioning groove at the top of the heat sink, a receiving space is formed between the body of the fins and the extension part, and the extension part A card slot communicating with the storage space is provided on the top, the fan includes a fan frame and an impeller arranged on the fan frame, the impeller is accommodated in the storage space, and the fan frame protrudes outward from a positioning portion , the fan frame extends downwards to form a fixed arm, the free end of the fixed arm is provided with a hook, the hook cooperates with the card slot, the positioning part is accommodated in the positioning groove, and jointly fix the fan on the heat dissipation device.

In the above heat dissipation device, since the heat sink is provided with a card slot, and the fan frame of the fan is provided with a fixed arm with a hook, when assembling the above heat dissipation device, the fan can be installed by simply pushing the fan On the radiator, there is no need for screw locking, the structure is simple, and the assembly is convenient. In addition, since the heat sink is provided with a positioning groove, and the fan is provided with a positioning portion that can be accommodated in the positioning groove, it can prevent the fan from rotating after assembly, which is beneficial to the positioning of the fan. Secondly, the fan is fixed in the housing space of the radiator, so that the fan is surrounded by the radiator, and the low-temperature airflow generated by the fan can be fully utilized to improve heat dissipation efficiency. At the same time, the radiator around the fan can also serve as a traditional fan The function of the side wall of the frame not only saves the materials used for the fan, but also increases the wind pressure of the fan.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a three-dimensional assembly view of a heat sink according to a preferred embodiment of the present invention.

FIG. 2 is an exploded view of the heat sink shown in FIG. 1 .

FIG. 3 is an exploded view of another form of the heat sink shown in FIG. 1 .

Detailed ways

FIG. 1 shows a heat dissipation device in a preferred embodiment of the present invention, which is used to dissipate heat from a heat-generating electronic component (not shown) such as a central processing unit. The heat dissipation device includes a base 10, a heat sink 20 disposed on the base 10, a plurality of heat pipes 30 combined with the heat sink 20, and a heat conduction column 40 arranged in the middle of the heat sink 20 (as shown in FIG. 2 ). And a fan 50 located on the radiator 20 .

Referring to FIGS. 2 and 3 , the heat sink 20 is annular and includes a pair of first fin sets 21 and a pair of second fin sets 23 .

Each first fin group 21 is fan-shaped, and is formed by stacking a plurality of first fins 211 , and an airflow channel 212 is formed between two adjacent first fins 211 . Each first fin 211 includes a body 213 and an extension 214 . The main body 213 is substantially square, and the first fin set 21 is provided with a plurality of semicircular receiving grooves 215 penetrating through each main body 213 for respectively accommodating the heat pipes 30 . The extension part 214 is integrally extended upwards from the top of the main body 213 at the outer side, and a stepped part 216 and a locking groove 217 are provided on the inner side of the extension part 214, and the width of the part above the stepped part 216 Smaller than the width of the portion of the extension portion 214 located below the stepped portion 216, the locking groove 217 is arranged below the stepped portion 216, which is roughly triangular in shape, and the upper side of the locking groove 217 is parallel to the stepped portion 216. 217 and the stepped portion 216 are used to fix the fan 50 . The extension part 214 vertically extends forward at its top and the step part 216 respectively to form an upper folded edge 218 and a stepped folded edge 219, and these upper folded edges 218 abut against each other to form the top surface 228 of the first fin set 21. , these stepped folded edges 219 abut against each other to jointly form the stepped surface 229 of the first fin set 21 .

Each second fin set 23 has a structure similar to that of the first fin set 21 . Each second fin group 23 is formed by stacking a plurality of second fins 231 , and an airflow channel 232 is formed between every two adjacent second fins 231 . Each second fin 231 includes a body 233 and an extension 234 . The body 233 is roughly triangular in shape, and the two right-angled sides of the triangle are located at the top and inside of the second fins 231 respectively, so that when the second fins 231 are assembled together to form the second fin group 23, the second An opening 240 is formed on the outer side of the fin group 23. The second fin group 23 is also provided with a semicircular receiving groove 235 that runs through each body 233. The receiving groove 235 communicates with the opening 240 for easy assembly. The heat pipe 30 enters the receiving groove 235 through the opening 240 . The extension portion 234 is integrally extended from the top of the main body 233 at the outer side, and the height of the extension portion 234 is smaller than that of the extension portion 214 of the first fin set 21 . An inner side of the extension portion 234 is provided with a slot 237 , the slot 237 matches with the slot 217 of the first fin set 21 and is at the same height. The top of the extension part 234 extends vertically forward to form an upper folded edge 238, and these upper folded edges 238 abut against each other to form the top surface 248 of the second fin set 23, the top surface 248 and the first fin set 21. The stepped surface 229 is coplanar, and the top surface 248 and the stepped surface 229 can increase the contact area with the fan 50 during installation, so that the force is more uniform.

Each heat pipe 30 has an arc-shaped condensation section 31 , a part of which is passed through the receiving groove 215 of the first fin set 21 , and the rest is embedded in the receiving groove 235 of the second fin set 23 Inside. The heat conduction column 40 is cylindrical and made of a material with good thermal conductivity, such as copper or aluminum, and is disposed between the first and second fin sets 21 , 23 of the heat sink 20 .

The fan 50 is fixed on the radiator 20 and includes a fan frame 51 and an impeller 53 disposed on the fan frame 51 . The fan frame 51 includes a bearing seat 511 in the middle, a fixing frame 512 at the periphery, and a plurality of supporting frames 513 connecting the fixing frame 512 and the bearing seat 511 .

The bearing base 511 is used for bearing the impeller 53 , and the impeller 53 is hung upside down on the bearing base 511 . The fixed frame 512 is circular, and extends vertically downwards to form a plurality of fixed arms 514. These fixed arms 514 are arranged at equal intervals on the fixed frame 512. The free end of each fixed arm 514 is provided with a hook 515. The part 515 protrudes outward from the fixed arm 514 along the radial direction of the fixed frame 512, and the hook part 515 cooperates with the slots 217, 237 on the first and second fin sets 21, 23 of the heat sink 20, so as to The fan 50 is fixed on the radiator 20 . The outer edge of the fixing frame 512 corresponds to the second fin group 23 and radially protrudes a pair of positioning parts 517 outward, each positioning part 517 is roughly fan-shaped, and its end close to the center of the fixing frame 512 is farther away from the fixing frame 512 One end of the center is narrow, and the height of each positioning portion 517 is equal to the height difference between the extension portions 214 , 234 of the first and second fin sets 21 , 23 . The supporting frames 513 are strip-shaped and used to support the supporting base 511 . Two of these support frames 513 are connected to the position of the fixed frame 512 corresponding to the positioning portion 517, and one of the support frames 513 is provided with a wire outlet slot 518, and a fan wire 519 is accommodated in the wire outlet slot 518 to connect the fan 50 with the outside. The power supply (not shown) is electrically connected to supply power to the fan 50 .

During assembly, the condensing section 31 of the heat pipe 30 passes through the receiving groove 215 of the pair of first fin sets 21 , wherein both ends of the condensing section 31 of the heat pipe 30 protrude out of the first fin set 21 . The first fin set 21 and the heat pipe 30 are placed on the base 10 , and the pair of first fin sets 21 are arranged opposite to each other along the circumference with a certain distance therebetween. The pair of second fin sets 23 are respectively inserted in the space formed between the pair of first fin sets 21 from top to bottom, and the two ends of the condensation section 31 of the heat pipe 30 are covered by the second fin set 23 The opening 240 enters and is accommodated in the receiving groove 235 of the second fin group 23; the first and second fin groups 21, 23 are arranged alternately, and encircle to form the annular radiator 20, the first The step surface 229 of the first fin group 21 is coplanar with the top surface 248 of the second fin group 23. Since the height of the extension 234 of the second fin group 23 is smaller than the height of the extension 214 of the first fin group 21, Thereby, a positioning groove 25 is formed between the first fin group 21 on the top of each second fin group 23, and the positioning groove 25 is fan-shaped; the first and second fin groups 21, 23 The locking grooves 217 , 237 jointly form the annular locking groove 27 of the heat sink 20 . The heat conduction column 40 is arranged in the middle of the first and second fin sets 21 , 23 , and its side surfaces are closely attached to and welded with the inner surfaces of the first and second fin sets 21 , 23 . The main body 213 and the extension part 214 of the first fin set 21, the main body 233 and the extension part 234 of the second fin set 23 and the heat conduction column 40 together form a receiving space 29 in the middle of the top of the radiator 20. The slot 27 communicates with the receiving space 29 , and the stepped portion 216 and the stepped surface 229 of the first fin set 21 are located in the receiving space 29 . Align the fan 50 with the accommodating space 29 of the radiator 20, and align the positioning portion 517 of the fan 50 with the positioning groove 25 of the radiator 20, press the fan 50 downward, and make the lower part of the fixing frame 512 of the fan 50 The surface is against the step surface 229 of the first fin group 21 of the heat sink 20 and the top surface 248 of the second fin group 23, and the lower surface of the positioning part 517 is against the second side of the heat sink 20. On the top surface 248 of the fin set 23, and the positioning portion 517 is just accommodated in the positioning groove 25, the hook portion 515 on the fixed arm 514 of the fan 50 is clamped in the slot 27 of the radiator 20, so as to The fan 50 is fixed on the radiator 20. At this time, the impeller 53 of the fan 50 is accommodated in the housing space 29, and the side surface of the fixing frame 512 of the fan 50 is just attached to the inner surface of the radiator 20. The upper surface and the side surface of the positioning portion 517 just do not protrude from the heat sink 20 , as shown in FIG. 3 .

In the above-mentioned heat dissipation device, the fan 50 is fixedly installed in the housing space 29 of the radiator 20, so that the impeller 53 of the fan 50 is surrounded by the radiator 20, and the low-temperature airflow generated by the fan 50 can be fully utilized to improve the heat dissipation efficiency. The heat sink 20 on the periphery of the fan 50 can also serve as the side wall of the traditional fan frame, which can increase the wind pressure of the fan 50 while saving the materials of the fan 50 . In addition, since the heat sink 20 is provided with a stepped portion 216 and a slot 27, and the fan 50 has a fixed frame 512 and a fixed arm 514 with a hook portion 515, when assembling the heat sink, it is only necessary to push the fan 50 The fan 50 can be installed on the radiator 20 without screw locking, the structure is simple, and the assembly is convenient. Secondly, since the radiator 20 is also provided with a positioning groove 25, the fan 50 is provided with a positioning portion 517 that can be positioned in the positioning groove 25, so it can prevent the fan 50 from rotating after assembly, which is beneficial to the fan 50. At the same time, the fixed frame 512 of the fan 50 does not protrude from the radiator 30, thereby laying a foundation for ensuring that the fan wire 519 does not protrude from the top surface 228 of the radiator 30 and preventing the fan wire 519 from being damaged. Again, the first and second fins 211, 231 of the heat sink 20 are arranged radially along the heat conduction column 40, so that the low-temperature airflow generated by the fan 50 can be controlled by the airflow between the first and second fins 211, 231. The passages 212 and 232 blow toward the surroundings of the heat sink 20 , and while taking away the heat from the heat sink 20 , they can also dissipate heat to other heat-generating electronic components around the heat sink 20 . Again, the heat sink 20 is formed by a pair of first fin sets 21 and a pair of second fin sets 23 staggered to form, so that the arc-shaped condensation section 31 of the heat pipe 30 can be passed through the first and second fin sets 21, Within 23.

Of course, in the above-mentioned heat dissipation device, the slot 27 on the radiator 20 can also be provided only on one of the first and second fin groups 21, 23, so that only the slot needs to be provided during manufacture. The fin group is processed, which can reduce the manufacturing process and reduce the cost.

Claims (10)

1. A cooling device, comprising a radiator and a fan combined with the radiator, characterized in that: a positioning groove is formed on the top of the radiator, and a housing space is formed in the middle of the top of the radiator, and the radiator is provided with A card slot communicating with the storage space, the fan includes a fan frame and an impeller arranged on the fan frame, the impeller is housed in the storage space, and the fan frame protrudes outward from a positioning portion, the fan frame The fan frame extends downwards to form a fixed arm, the free end of the fixed arm is provided with a hook, the hook cooperates with the card slot, and the positioning part is accommodated in the positioning groove to jointly fix the fan on the radiator. 2. The heat dissipation device according to claim 1, wherein the heat sink comprises a pair of first fin sets and a pair of second fin sets, and the heat sink is composed of first and second fin sets The pair of first fin groups and the pair of second fin groups are mutually staggered, and each of the first and second fin groups includes a main body and an extension extending upward from the main body, and the second The height of the extension part of the fin group is smaller than the height of the extension part of the first fin group, and the positioning groove is formed between the first fin groups on each second fin group. 3. The heat dissipation device according to claim 2, wherein the width of the extension part of the first and second fin groups is smaller than the width of the main body, and the receiving space is formed in the first and second fin groups Between the extension part of the fin group and the main body, the locking groove is provided on the extension part of at least one of the first and second fin groups. 4. The heat dissipation device according to claim 2, further comprising a heat pipe, the heat pipe includes an arc-shaped condensation section, each of the first and second fin groups is provided with a receiving groove, and each of the first fin groups Openings are also provided on the two fin groups, and the openings communicate with the receiving grooves of the second fin group. A part of the condensing section of the heat pipe is inserted in the receiving grooves of the first fin group, and the other part is provided by the second fin group. The opening of the fin set enters and is accommodated in the receiving groove of the second fin set. 5. The heat dissipation device according to claim 1, wherein the fan frame comprises an annular fixed frame, the positioning portion is formed by radially extending outward from the fixed frame, and the fixed arm is formed by the fixed frame Extending downward, the heat sink is further provided with a step above the slot, and the fixing frame abuts against the step. 6. The heat dissipation device according to claim 5, wherein the heat sink comprises a pair of first fin groups and a pair of second fin groups, and the first fin group consists of several first fin groups The second fin group is formed by stacking a plurality of second fins, the step part is formed on the first fin group, and each first fin is located at the step part. There are step folds, the step folds jointly form the step surface of the first fin group, and the top ends of each second fin are provided with upper folds, and the upper folds jointly form the second fin group The top surface, the top surface of the second fin group is coplanar with the step surface of the first fin group, and the fixed frame of the fan is against the top surface of the second fin group and the step of the first fin group On the top surface, the positioning part of the fan abuts against the top surface of the second fin set. 7. A heat dissipation device, comprising a heat sink and a fan combined with the heat sink, the heat sink includes a plurality of fins, characterized in that: the fins include a body and an extension formed by extending upward from the body, the extension The width of the part is smaller than the width of the body, and the extension part of one part of the fins protrudes from the extension part of the other part of the fins to form a positioning groove at the top of the radiator, and a receiving space is formed between the body and the extension part of the fins. space, the extension part is provided with a card slot communicating with the storage space, the fan includes a fan frame and an impeller arranged on the fan frame, the impeller is housed in the storage space, and the fan frame faces The positioning part protrudes outward, and the fan frame extends downward to form a fixed arm. The free end of the fixed arm is provided with a hook part, and the hook part cooperates with the card slot. The positioning part is accommodated in the positioning groove. Fix the fan on the radiator together. 8. The heat dissipation device according to claim 7, wherein the heat sink comprises a pair of first fin sets and a pair of second fin sets, and the heat sink is composed of first and second fin sets Forming a ring shape, the pair of first fin groups and the pair of second fin groups are staggered from each other, and the extension of the fins of the first fin group protrudes beyond the extension of the fins of the second fin group department. 9. The heat dissipation device according to claim 7, wherein the fan frame includes an annular fixed frame, the positioning portion is formed by extending radially outward from the fixed frame, and the fixed arm is formed by the fixed frame Extending downward, the heat sink is further provided with a step above the slot, and the fixing frame abuts against the step. 10. The heat dissipation device according to claim 9, wherein the heat sink comprises a pair of first fin groups and a pair of second fin groups, and the first fin group consists of several first fin groups The second fin group is formed by stacking a plurality of second fins, the step part is formed on the first fin group, and each first fin is located at the step part. There are step folds, the step folds jointly form the step surface of the first fin group, and the top ends of each second fin are provided with upper folds, and the upper folds jointly form the second fin group The top surface, the top surface of the second fin group is coplanar with the step surface of the first fin group, and the fixed frame of the fan is against the top surface of the second fin group and the step of the first fin group On the top surface, the positioning part of the fan abuts against the top surface of the second fin set.

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