CN102790020A - Liquid-cooled heat sink - Google Patents

Abstract

The invention discloses a liquid-cooled heat dissipating double-fuselage, comprising: the heat absorption portion, first transmission pipe, second transmission pipe and heat dissipation portion, wherein the heat absorption portion includes: the heat absorption block, the first sudden expansion pipe and the second sudden expansion pipe. The heat absorption block is used for contacting with an external heating element, a plurality of flow channels are arranged in the heat absorption block, and cooling liquid flows in the flow channels to absorb heat generated by the external heating element. The first sudden expansion pipe is connected with one side of the heat absorption block, and the second sudden expansion pipe is connected with the other side of the heat absorption block. The first transmission pipe is connected with the first sudden expansion pipe, the second transmission pipe is connected with the second sudden expansion pipe, and the heat dissipation part is respectively connected with the first transmission pipe and the second transmission pipe, so that a loop is formed among the heat absorption part, the heat dissipation part, the first transmission pipe and the second transmission pipe, and cooling liquid can flow in the loop.

Description

Liquid-cooled heat sink

technical field

The invention relates to a heat dissipation device, in particular to a liquid-cooled heat dissipation device.

Background technique

Due to the improvement of the operating efficiency of electronic devices, the operating efficiency of heating elements in electronic devices is also getting higher and higher. In order to maintain the normal operation of electronic devices, taking the cooling device of CPU in electronic devices as an example, liquid cooling is commonly used at present. System, and this kind of cooling device has a cavity on the heat-absorbing copper block that is in direct contact with the CPU for the flow of coolant, so that the coolant in the cavity can exchange heat with the heat-absorbing copper block, and then let the heat-absorbing copper block The contacted CPU cools down, but the cavity occupies a certain volume, which makes the liquid cooling system larger, and the contact area with the heat-absorbing copper block and the cooling liquid is limited, and the effect of the cooling liquid cannot be fully exerted.

In a liquid-cooled heat sink disclosed in the background art, a plurality of recesses are designed in the cavity to increase the contact area between the cooling liquid and the heat-absorbing block to improve heat exchange efficiency. However, this background technology still retains a cavity with a considerable volume, and does not reduce the volume of the liquid-cooled heat sink.

Therefore, it is necessary to provide a liquid-cooled heat dissipation device, which can not only save the volume occupied by the cavity, but also increase the heat exchange area between the cooling liquid and the CPU, so as to reduce the volume and increase the heat exchange efficiency.

Contents of the invention

A main object of the present invention is to provide a heat absorbing block having a plurality of flow channels inside.

Another main objective of the present invention is to provide a liquid-cooled heat sink that increases the heat exchange area between the cooling liquid and the external heating element.

In order to achieve the above-mentioned purpose, the liquid-cooled heat dissipation device of the present invention includes: a heat-absorbing part, a first transmission pipe, a second transmission pipe and a heat-dissipating part, wherein the heat-absorbing part includes: a heat-absorbing block, a first sudden expansion pipe and The second sudden expansion tube. The heat-absorbing block is used to contact the external heating element. There are multiple flow channels inside the heat-absorbing block to allow the coolant to flow in the multiple flow channels to absorb the heat emitted by the external heating element during operation. The first sudden expansion tube and One side of the heat-absorbing block is connected to allow the cooling liquid to flow into multiple flow channels, and the second sudden expansion tube is connected to the other side of the heat-absorbing block to allow the cooling liquid to flow out of the multiple flow channels. The first transmission pipe is connected with the first sudden expansion pipe, the second transmission pipe is connected with the second sudden expansion pipe, and the heat dissipation part is respectively connected with the first transmission pipe and the second transmission pipe, so that the heat absorption part, the heat dissipation part and the first transmission pipe A loop is formed between the tube and the second transfer tube, allowing the coolant to flow in the loop.

Description of drawings

FIG. 1 is an exploded schematic diagram of a liquid-cooled heat sink according to an embodiment of the present invention;

2 is an exploded schematic diagram of a heat absorbing part of a liquid-cooled heat sink according to an embodiment of the present invention;

3 is an exploded schematic diagram of a heat absorbing part of a liquid-cooled heat sink according to another embodiment of the present invention;

Fig. 4 is a schematic diagram of a heat absorbing block according to another embodiment of the present invention;

Fig. 5 is a schematic diagram of a heat absorbing block according to another embodiment of the present invention;

FIG. 6 is an exploded schematic diagram of a liquid-cooled heat sink according to another embodiment of the present invention.

Description of main component symbols

Liquid cooling heat sink 1, 1a Heat absorbing part 10, 10a

Heat-absorbing block 11 first sudden expansion tube 12, 12a

Flow channel 111, 111a, 111b Second sudden expansion tube 13, 13a

Liquid inlet port 121 Heat absorbing block port 122, 132

The first transmission pipe 20 heat dissipation part 40

Outlet port 131 Heat sink 42

Second transfer pipe 30 Coolant 60

Fan 41 External heating element 90

pump 50

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below and described in detail in conjunction with the accompanying drawings.

Please refer to FIG. 1 for a liquid-cooled heat sink according to an embodiment of the present invention, wherein FIG. 1 is an exploded view of the liquid-cooled heat sink.

As shown in FIG. 1 , the liquid-cooled heat sink 1 of the present invention is in contact with an external heating element 90 for dissipating the heat generated by the external heating element 90 . The liquid-cooled heat sink 1 includes a heat absorbing portion 10 , a first transmission pipe 20 , a second transmission pipe 30 and a heat dissipation portion 40 , and the connection between the heat absorption portion 10 , the heat dissipation portion 40 and the first transmission pipe 20 and the second transmission pipe 30 A circuit is formed between them, so that the cooling liquid 60 can flow in the circuit in the direction shown by the arrow in FIG. 1 .

In one embodiment of the present invention, the heat absorbing block 10 is a copper block, but the present invention is not limited thereto, and the heat absorbing block 10 can be any material with high thermal conductivity. In one embodiment of the present invention, the material used for the first transmission pipe 20 and the second transmission pipe 30 is plastic or copper, and the cooling liquid 60 is refrigerant or fluorocarbon dielectric fluid (FC72), but the present invention does not rely on This is the limit. In this embodiment, the cooling part 40 has a fan 41 and a cooling fin 42 , and the cooling fin 42 is adjacent to the fan 41 , and the cooling fin 42 is connected to the first transmission tube 20 and the second transmission tube 30 respectively. The fan 41 and the cooling fins 42 can cool down the cooling liquid 60 to return to the supercooled state, and the cooling liquid 60 that has returned to the supercooled state will enter the heat absorbing part 10 through the first transmission pipe 20, thereby continuously cooling the external heat. Element 90. In one embodiment of the present invention, the external heating element 90 in contact with the liquid-cooled heat sink 1 is a central processing unit (CPU), but the present invention is not limited thereto, and the liquid-cooled heat sink 1 can be connected with any heat-generating Components, such as a graphics processing chip, a south bridge chip or a north bridge chip and other heat-generating chips, are in contact with each other for dissipating the generated heat.

Next, please refer to FIG. 2 for the heat absorbing part of the liquid-cooled heat sink according to an embodiment of the present invention, wherein FIG. 2 is an exploded view of the heat absorbing part.

As shown in FIGS. 1 and 2 , the heat absorbing portion 10 includes a heat absorbing block 11 , a first sudden expansion tube 12 and a second sudden expansion tube 13 . The heat absorbing block 11 is used to contact the external heating element 90 to absorb the heat generated by the external heating element 90 . The inside of the heat absorbing block 11 includes a plurality of flow channels 111, which are used to allow the cooling liquid 60 to flow in the plurality of flow channels 111 as shown by the arrows in FIGS. hot.

The first sudden expansion tube 12 has a liquid inlet port 121 and a heat absorbing block port 122 . One end of the first expansion tube 12 is connected to the first transfer pipe 20 through the liquid inlet port 121 , and the other end is connected to the heat absorbing block 11 through the heat absorbing block port 122 . The liquid inlet port 121 is a single pipe diameter, which is connected with the first transmission pipe 20 and allows the cooling liquid 60 to flow into the first sudden expansion pipe 12 and then flow into the plurality of flow channels 111 . Through the design of the first sudden expansion tube 12, the cooling liquid 60 can be guided to flow in multiple tube diameters (multiple flow channels 111) of the heat absorbing block 11 from originally flowing in a single tube diameter (the first transfer tube 20). , to cool the external heating element 90 , and in order to match the heat absorbing block 11 , the pipe diameter of the heat absorbing block interface 122 is substantially equivalent to the size of the end connected to the heat absorbing block 11 .

The second sudden expansion tube 13 has a liquid outlet port 131 and a heat-absorbing block interface 132. One end of the second sudden expansion tube 13 is connected to the heat-absorbing block 11 through the heat-absorbing block interface 132, and the other end is connected to the second transmission port through the liquid outlet port 131. The tubes 30 are connected, and the liquid outlet port 131 is a single tube diameter, which is connected with the second transmission tube 30 , allowing the cooling liquid 60 that has absorbed the heat generated by the external heating element 90 to flow out of the second expansion tube 13 . Through the design of the second sudden expansion pipe 13, the cooling liquid 60 flows from the multiple pipe diameters (multiple flow channels 111) of the heat absorbing block 11, and returns to a single pipe diameter (the second transmission pipe 30), and In order to cooperate with the heat-absorbing block 11 , the pipe diameter of the heat-absorbing block interface 132 is substantially equivalent to the size of the end connected to the heat-absorbing block 11 . At this time, the coolant 60 flowing out of the second sudden expansion tube 13 will flow into the second transmission tube 30 and then enter the heat dissipation part 40 .

As shown in FIG. 2 , in an embodiment of the present invention, the plurality of flow channels 111 are circular tubes, and the diameter of each flow channel is substantially smaller than 3 mm, but the present invention is not limited thereto. The present invention can increase the heat exchange area between the cooling liquid 60 and the external heating element 90 by arranging a plurality of flow channels 111 in the heat absorbing block 11 in direct contact with the external heating element 90 , thereby improving cooling efficiency. Furthermore, the mass flow rate (mass flow rate) of the cooling liquid flowing in each flow channel 111 is smaller than that of using a single pipe diameter, so the cooling liquid flowing in each flow channel 111 can be faster Reach the boiling point of the cooling liquid (quickly produce a phase change from liquid phase to gas phase), thereby taking away more heat, and improving the heat transfer efficiency of the heat-absorbing block 11, and then improving the liquid-cooled heat dissipation device 1 of the present invention. The efficiency of cooling the external heating element 90. In addition, the liquid-cooled heat sink 1 of the present invention can allow the cooling liquid 60 to flow directly in the flow channel 111 of the heat-absorbing block 11, which can save the space of the heat-absorbing part 10, so that the heat-absorbing part 10 of the liquid-cooled heat sink 1 smaller in size.

It should be noted here that, as shown in FIG. 2 , in one embodiment of the present invention, the first sudden expansion tube 12 and the second sudden expansion tube 13 are roughly triangular in shape, and the cooling liquid 60 is inside the heat absorption part 10 The flow direction is straight flow, but the present invention is not limited thereto. The first sudden expansion tube 12 and the second sudden expansion tube 13 can also have other shapes, and the cooling liquid 60 can also flow in other directions in the heat absorption part 10 .

Please refer to FIG. 3 for the heat absorbing part of a liquid-cooled heat sink according to another embodiment of the present invention, wherein FIG. 3 is an exploded view of the heat absorbing part. As shown in FIG. 3 , in another embodiment of the present invention, the shape of the first sudden expansion tube 12 a and the second sudden expansion tube 13 a of the heat absorption part 10 a is a long cylinder. The liquid inlet port 121 is disposed at one end of the first sudden expansion tube 12a, and the liquid outlet port 131 is disposed at one end of the second sudden expansion tube 13a. The flow direction of the cooling liquid 60 in the heat absorbing portion 10a is shown by the arrows in FIG. A plurality of flow channels 111 of the thermal block 11 . The cooling liquid 60 that has absorbed the heat generated by the external heating element 90 then flows out of the plurality of flow channels 111 from left to right and enters the second sudden expansion pipe 13a, and finally the cooling liquid 60 flows into the second sudden expansion pipe 13a from bottom to top through the liquid outlet port 131. Transfer tube 30.

In addition, as shown in Figures 2 and 3, in an embodiment of the present invention, the plurality of flow channels 111 of the heat absorbing block 11 are approximately circular in diameter, but the present invention is not limited thereto, and the plurality of flow channels 111 can also be other shapes. External heating element 90

Please refer to FIG. 4 and FIG. 5 for the heat absorbing block according to another embodiment of the present invention, wherein FIG. 4 and FIG. 5 are schematic diagrams of the heat absorbing block.

As shown in Figure 4, in another embodiment of the present invention, the plurality of flow channels 111a of the heat-absorbing block 11a can be a square pipe diameter; or, as shown in Figure 5, in another embodiment of the present invention, The plurality of flow channels 111b of the heat absorbing block 11b may be star-shaped pipe diameters, but the present invention is not limited to the above-mentioned embodiments.

In addition, the plurality of flow channels 111 , 111 a , 111 b of the present invention can also be arbitrarily matched with the first sudden expansion tube 12 , 12 a or the second sudden expansion tube 13 , 13 a. Furthermore, in order to further improve the heat absorption efficiency of the heat absorption block 11 , in the present invention, cooling fins or internal helical threads can also be provided in the plurality of flow channels 111 , 111 a , 111 b.

Please refer to FIG. 6 for a liquid-cooled heat sink according to another embodiment of the present invention, wherein FIG. 6 is an exploded schematic view of the liquid-cooled heat sink.

As shown in FIG. 6, in another embodiment of the present invention, a liquid-cooled heat sink 1a includes a heat absorbing portion 10, a first transmission pipe 20, a second transmission pipe 30, a heat dissipation portion 40, and a pump 50. The pump 50 can be To accelerate the heat dissipation cycle of the cooling liquid 60, for pumping the cooling liquid 60 that returns to the supercooled state after the cooling part 40 has dissipated heat, into the first transfer pipe 20, so that the cooling liquid 60 enters the heat absorbing part 10 again to perform A heat dissipation cycle that cools the external heating element 90 . In this embodiment, the pump 50 is disposed on the first delivery pipe 20 , but the present invention is not limited thereto.

To sum up, the present invention shows its characteristics that are very different from the prior art in terms of purpose, means and effect. However, it should be noted that the above-mentioned embodiments are examples only for the convenience of description, and the scope of rights claimed in the present invention should be determined by the claims, rather than limited to the above-mentioned embodiments.

Claims (10)

1. liquid-cooling heat radiator comprises:

The endothermic section, this endothermic section comprises:

Heat-absorbing block, in order to contact with an outside heater element, this heat-absorbing block inside comprises a plurality of circulation roads, in order to let a cooling fluid in these a plurality of circulation roads, flow, to absorb the heat that this outside heater element is produced;

The first sudden expansion pipe, it is connected with a side of this heat-absorbing block, in order to let this cooling fluid flow in these a plurality of circulation roads; And

The second sudden expansion pipe, it is connected with the opposite side of this heat-absorbing block, in order to let this cooling fluid flow out these a plurality of circulation roads;

First transfer tube, it is connected with this first sudden expansion pipe;

Second transfer tube, it is connected with this second sudden expansion pipe; And

Radiating part, it is connected with this first transfer tube and this second transfer tube respectively, makes to form a loop between this endothermic section, this radiating part and this first transfer tube and this second transfer tube, lets this cooling fluid be able in this loop, flow.

2. liquid-cooling heat radiator as claimed in claim 1, wherein the caliber of each circulation road of these a plurality of circulation roads is in fact less than 3mm.

3. liquid-cooling heat radiator as claimed in claim 2, wherein each circulation road of these a plurality of circulation roads is essentially circular caliber.

4. liquid-cooling heat radiator as claimed in claim 2, wherein each circulation road of these a plurality of circulation roads is essentially square caliber or star caliber.

5. liquid-cooling heat radiator as claimed in claim 2, wherein this first sudden expansion pipe or this second sudden expansion pipe are essentially triangle.

6. liquid-cooling heat radiator as claimed in claim 2, wherein this first sudden expansion pipe or this second sudden expansion pipe are essentially rectangular cylinder, and this first transfer tube is connected with an end of this first sudden expansion pipe, and this second transfer tube is connected with an end of this second sudden expansion pipe.

7. like each described liquid-cooling heat radiator of claim 1 to 6, also comprise a pump, this pump is located at this first transfer tube.

8. like each described liquid-cooling heat radiator of claim 1 to 6, wherein this radiating part also comprises a fan and a fin.

9. like each described liquid-cooling heat radiator of claim 1 to 6, wherein this endothermic section is made by the material of the high heat conduction of a tool (Thermal Conductivity) character.

10. like 9 described liquid-cooling heat radiators of claim the, wherein this endothermic section is made by copper.

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