LIQUID-COOLING HEAT SINK AND HEAT EXCHANGER THEREOF
A liquid-cooling heat sink includes a base, a cover and a heat exchanger. The cover has an intake pipe and an exhaust pipe. The heat exchanger includes heat-dissipating plates overlapping with each other. Each heat-dissipating plate has dividing strips. Any two adjacent dividing strips define a through-hole. Both ends of each heat-dissipating plate are provided with a notch respectively. Each heat-dissipating plate overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively. The dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel. The cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel. In this way, the heat-exchanging efficiency and heat-dissipating effect are improved.
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1. Field of the Invention
The present invention relates to a heat sink, and in particular to a liquid-cooling heat sink and a heat exchanger thereof.
2. Description of Prior Art
With the rapid advancement of science and technology, the performance and power of electronic elements increase greatly, so that the amount of heat generated by the electronic elements also gets more and more. If the heat generated by the electronic elements is not dissipated to the outside, the heat will be accumulated in the electronic elements to cause the increase of their temperature. As a result, the performance of the electronic elements is deteriorated and thus their lifetime is shortened.
Therefore, a heat sink is mounted in an electronic apparatus such as a computer host, a liquid crystal display, a television set, a plasma TV to dissipate its heat. At an early stage, a fan is often used as the heat sink. However, the heat-dissipating effect of the fan is insufficient. Thus, in order to increase the heat-dissipating effect, the industry in this field proposes a liquid-cooling heat sink, which includes a base, a cover covering the base, and a heat exchanger disposed between the base and the cover. The base is brought into thermal contact with an electronic element to be cooled. The heat generated by the electronic element is conducted to the heat exchanger. An accommodating space is formed between the base and the cover for allowing a cooling liquid to flow through. The cover is provided with an intake pipe and an exhaust pipe. The cooling liquid flows into the accommodating space from the intake pipe to be heat-exchanged with the heat exchanger and then exits via the exhaust pipe. The circulation of the cooling liquid continuously carries the heat of the electronic element to the outside, thereby achieving a heat-dissipating effect by liquid cooling.
However, the performance of the conventional liquid-cooling heat sink depends on the heat-exchanging efficiency between the heat exchanger and the cooling liquid. Thus, if the contact area and contact time between the heat exchanger and the cooling liquid are increased, the heat-exchanging efficiency between the heat exchanger and the cooling liquid can be increased greatly.
Therefore, it is an important issue for the present Inventor to solve the above problems.
SUMMARY OF THE INVENTIONThe present invention is to provide a liquid-cooling heat sink, which is capable of increasing the contact area and contact time between the heat exchanger and the cooling liquid, thereby increasing the heat-exchanging efficiency and heat-dissipating effect.
The present invention provides a liquid-cooling heat sink, including:
a base;
a cover covering the base, an accommodating space being formed between the base and the cover for allowing a cooling liquid to be disposed therein, the cover having an intake pipe and an exhaust pipe both in communication with the accommodating space; and
a heat exchanger disposed in the accommodating space and comprising a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of dividing strips, any two adjacent dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel for allowing the cooling liquid to flow through, the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
The present invention provides a liquid-cooling heat sink, including:
a base;
a cover covering the base, an accommodating space being formed between the base and the cover for allowing a cooling liquid to be disposed therein, the cover having an intake pipe and an exhaust pipe both in communication with the accommodating space; and
a heat exchanger disposed in the accommodating space and comprising a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of curved dividing strips, any two adjacent curved dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the curved dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a plurality of multi-direction sub-channels for allowing the cooling liquid to flow through, the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
The present invention is to provide a heat exchanger of a liquid-cooling heat sink, which is capable of increasing the contact area and contact time between the heat exchanger and the cooling liquid, thereby increasing the heat-exchanging efficiency and heat-dissipating effect.
The present invention provides a heat exchanger of a liquid-cooling heat sink, disposed in the liquid-cooling heat sink for allowing a cooling liquid to flow through, the heat exchanger including:
a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of dividing strips, any two adjacent dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel for allowing the cooling liquid to flow through, the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
In comparison with prior art, the present invention has the advantageous features as follows:
According to the present invention, each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively. The dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel for allowing the cooling liquid to flow through. The cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel. Thus, after the cooling liquid flows into the notch of each heat-dissipating plate from the intake notch channel, the cooling liquid flow through the heat-dissipating plate and then through the gaps between the adjacent two overlapped heat-dissipating plates to thereby enter the adjacent through-holes. Since the dividing strips define an intersecting structure on upper and lower sides of each through-hole, the cooling liquid is guided by the intersecting structure to flow upwards, downwards, leftwards and rightwards into the multi-direction sub-channels in the through-holes of each heat-dissipating plates. In this way, the contact area and contact time between the cooling liquid and the heat-dissipating plates are increased greatly, and the heat-dissipating effect of the heat sink is thus improved.
According to the above, each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively. The cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel. Thus, the periphery of the heat exchanger is provided with the intake notch channel and the exhaust notch channel. As a result, the intake pipe and the exhaust pipe may not have to be provided on the top of the cover and may be provided on one side edge or both side edges of the cover. Therefore, the space occupied by the heat sink in the vertical direction is reduced, which shortens the thickness of the heat sink. Further, the positions of the intake pipe and the exhaust pipe can be changed based on practical demands, which makes the heat sink to have changeable spatial arrangements.
The detailed description and technical contents of the present invention will become apparent with the following detailed description accompanied with related drawings. It is noteworthy to point out that the drawings is provided for the illustration purpose only, but not intended for limiting the scope of the present invention.
Please refer to
The base 10 is made of metallic materials having high heat conductivity such as aluminum, copper or the like. The base 10 can be formed into any suitable shape. In the first embodiment, the base 10 is formed into a flat disk. After the cover 20 covers the base 10, an accommodating space S is formed between the base 10 and the cover 20 for allowing a cooling liquid and the heat exchanger 30 to be disposed therein. As shown in
The cover 20 is also made of metallic materials having high heat conductivity such as aluminum, copper or the like. The cover 20 is formed into a shape corresponding to the outer profile of the base 10 to thereby cover the base 10. Of course, the base 10 may be formed into a recessed disk, while the cover 20 is formed into a flat disk. The periphery of the cover 20 is connected to the periphery of the base 10. In this way, an accommodating space S can be also defined between the base 10 and the cover 20.
The top of the cover 20 is provided with an intake pipe 21 and an exhaust pipe 22 both in communication with the accommodating space S. The intake pipe 21 and the exhaust pipe 22 are formed on the cover 20 by a machining process or a welding process.
In order to avoid the leakage of the cooling liquid from the connecting portion between the base 10 and the cover 20, a gasket 11 is disposed into the connecting portion between the base 10 and the cover 20. It can be seen from
The heat exchanger 30 is disposed in the accommodating space S and comprises a plurality of heat-dissipating plates 31 overlapping with each other. Each of the heat-dissipating plates 31 is made of metallic materials having high heat conductivity such as aluminum, copper or the like. The heat-dissipating plates 31 are used to absorb the heat of the heat source (not shown) brought into thermal contact with the base 10.
As shown in
When the heat-dissipating plates 31, 31′ overlap with each other to form the heat exchanger 30 of the present invention, any heat-dissipating plate 31 overlaps with adjacent one heat-dissipating plate 31′ in a head-to-tail manner, so that the first notch 313 and the second notch 314 of each heat-dissipating plate 31 correspond to the second notch 314′ and the first notch 313′ of another adjacent heat-dissipating plate 31′ respectively, thereby forming an intake notch channel 316 and an exhaust notch channel 317. In other words, each heat-dissipating plate 31 and adjacent one heat-dissipating plate 31′ are staggered with each other by approximate 180 degrees. According to the embodiment shown in
It can be seen from
In order to better understand the three-dimensional flow of the cooling liquid in the heat exchanger 30, please refer to
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When the heat-dissipating plates 31a, 31a′ overlap with each other to form the heat exchanger 30 of the present invention, each heat-dissipating plate 31a and adjacent one heat-dissipating plate 31a′ overlap with each other in a head-to-tail manner. As a result, the first notch 313a and the second notch 314a of each heat-dissipating plate 31a correspond to the second notch 314a′ and the first notch 313a′ of adjacent another heat-dissipating plate 31a respectively. In other words, each heat-dissipating plate 31a and the adjacent one heat-dissipating plate 31a′ are staggered with each other by approximate 180 degrees, thereby forming an intake notch channel 316a and an exhaust notch channel 317a.
Since the curved through-holes 315a of each heat-dissipating plate 31a are not symmetrical to each other in the left-and-right direction, the first dividing strips 311a′ of the lower heat-dissipating plate 31a′ will intersect with the first dividing strips 311a of the upper heat-dissipating plate 31a, thereby dividing each through-hole 315a into a plurality of multi-direction sub-channels for allowing the cooling liquid to flow through.
Please refer to
In the third embodiment, each heat-dissipating plate 31b has a plurality of first dividing strips 311b and a plurality of second dividing strips 312b intersecting with the first dividing strips 311b. It should be noted that, in
As shown in
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According to the above, in the first to third embodiments of the present invention, since the side edges of each heat-dissipating plate 31 are formed with an intake notch channel 316 and an exhaust notch channel 317 respectively, the cooling liquid can flow into the heat exchanger 30 via the upside of the heat-dissipating plate 31. Alternatively, the cooling liquid may flow into the heat exchanger 30 via the side edges of the heat-dissipating plate 31 on which the notches 313 or 314 are provided. In other words, there are several arrangements for the intake pipe 21 and the exhaust pipe 22. For example, the intake pipe 21 and the exhaust pipe 22 may be provided on the top or bottom of the cover 20. the intake pipe 21 is provided on the top or bottom of the cover 20, while the exhaust pipe 22 is provided on one side edge of the cover 20. The intake pipe 21 and the exhaust pipe 22 are provided on two opposite or adjacent side edges of the cover 20. Therefore, the liquid-cooling heat sink 1 of the present invention is capable of guiding the cooling liquid to flow in multiple directions. Further, the arrangement for the intake pipe 21 and the exhaust pipe 22 can be changed based on practical demands.
Although the present invention has been described with reference to the above preferred embodiments, the profile of the heat-dissipating plate 31, 31′ and the shapes of the dividing strips 311, 311′ and the through-holes 315, 315′ can be changed in a manner equivalent to those of the above preferred embodiments. For example, in the second embodiment, the dividing strips 311a, 311a′ and the through-holes 315, 315a are formed into a curved shape with respect to the line connecting the first notch 313 and the second notch 314. However, the dividing strips 311a, 311a′ and the through-holes 315a, 315a′ may be arranged to be parallel to or inclined with respect to the line connecting the first notch 313 and the second notch 314 as long as the dividing strips 311a, 311a′ intersect with each other to divide the through-holes 315a, 315a′ of the lower heat-dissipating plate 31a, 31a′ into a plurality of multi-direction sub-channels.
In the first embodiment and the second embodiment, the dividing strips 311a, 311a′ and the through-holes 315a, 315a′ are symmetrical to each other with respect to the line connecting the first notch 313 and the second notch 314, so that the intake notch channel 316 and the exhaust notch channel 317 are symmetrical to each other. However, the dividing strips 311a, 311a′ and the through-holes 315a, 315a′ may not be symmetrical to each other with respect to the line connecting the first notch 313 and the second notch 314, so that the intake notch channel 316 and the exhaust notch channel 317 are not symmetrical to each other.
Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still occur to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
Claims
1. A liquid-cooling heat sink, including:
- a base;
- a cover covering the base, an accommodating space being formed between the base and the cover for allowing a cooling liquid to be disposed therein, the cover having an intake pipe and an exhaust pipe both in communication with the accommodating space; and
- a heat exchanger disposed in the accommodating space and comprising a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of dividing strips, any two adjacent dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
- wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel for allowing the cooling liquid to flow through, and the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
2. The liquid-cooling heat sink according to claim 1, wherein the two notches are provided on two opposite ends of each heat-dissipating plate to make the intake notch channel and the exhaust notch channel to be symmetrical to each other.
3. The liquid-cooling heat sink according to claim 1, wherein the two notches are provided on two adjacent ends of each heat-dissipating plate to make the intake notch channel and the exhaust notch channel to be unsymmetrical to each other.
4. The liquid-cooling heat sink according to claim 1, wherein the dividing strips of each heat-dissipating plate comprises a plurality of first dividing strips and a plurality of second dividing strips, and the second dividing strips intersect with the first dividing strips to form an X-shaped structure.
5. The liquid-cooling heat sink according to claim 4, wherein the through-holes of each heat-dissipating plate are divided by the intersecting portions of the first dividing strips and the second dividing strips into the sub-channels.
6. The liquid-cooling heat sink according to claim 4, wherein the dividing strips of each heat-dissipating plate comprises a plurality of first dividing strips and a plurality of second dividing strips, and the second dividing strips perpendicularly intersect with the first dividing strips to form a cross structure.
7. The liquid-cooling heat sink according to claim 6, wherein the through-holes of each heat-dissipating plate are divided by the perpendicularly intersecting portions of the first dividing strips and the second dividing strips into the sub-channels.
8. The liquid-cooling heat sink according to claim 1, wherein the base and the cover are made of metallic materials having high heat conductivity, a gasket is disposed in a connecting portion between the base and the cover, and the accommodating space is formed in the cover.
9. The liquid-cooling heat sink according to claim 1, wherein the intake pipe and the exhaust pipe are provided on the top of the cover.
10. The liquid-cooling heat sink according to claim 1, wherein the intake pipe is provided on the top of the cover, and the exhaust pipe is provided on one side edge of the cover.
11. The liquid-cooling heat sink according to claim 1, wherein the intake pipe and the exhaust pipe are provided on both side edges of the cover.
12. A heat exchanger of a liquid-cooling heat sink, disposed in the liquid-cooling heat sink for allowing a cooling liquid to flow through, the heat exchanger including:
- a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of dividing strips, any two adjacent dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
- wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a multi-direction sub-channel for allowing the cooling liquid to flow through, and the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
13. The heat exchanger of a liquid-cooling heat sink according to claim 12, wherein the two notches are provided on two opposite ends of each heat-dissipating plate to make the intake notch channel and the exhaust notch channel to be symmetrical to each other.
14. The heat exchanger of a liquid-cooling heat sink according to claim 12, wherein the two notches are provided on two adjacent ends of each heat-dissipating plate to make the intake notch channel and the exhaust notch channel to be unsymmetrical to each other.
15. The heat exchanger of a liquid-cooling heat sink according to claim 12, wherein the dividing strips of each heat-dissipating plate comprises a plurality of first dividing strips and a plurality of second dividing strips, and the second dividing strips intersect with the first dividing strips to form an X-shaped structure.
16. The heat exchanger of a liquid-cooling heat sink according to claim 15, wherein the through-holes of each heat-dissipating plate are divided by the intersecting portions of the first dividing strips and the second dividing strips into the sub-channels.
17. The heat exchanger of a liquid-cooling heat sink according to claim 15, wherein the dividing strips of each heat-dissipating plate comprises a plurality of first dividing strips and a plurality of second dividing strips, and the second dividing strips perpendicularly intersect with the first dividing strips to form a cross structure.
18. The heat exchanger of a liquid-cooling heat sink according to claim 17, wherein the through-holes of each heat-dissipating plate are divided by the perpendicularly intersecting portions of the first dividing strips and the second dividing strips into the sub-channels.
19. A liquid-cooling heat sink, including:
- a base;
- a cover covering the base, an accommodating space being formed between the base and the cover for allowing a cooling liquid to be disposed therein, the cover having an intake pipe and an exhaust pipe both in communication with the accommodating space; and
- a heat exchanger disposed in the accommodating space and comprising a plurality of heat-dissipating plates overlapping with each other, each of the heat-dissipating plates being constituted of a plurality of curved dividing strips, any two adjacent curved dividing strips defining a through-hole, both ends of each heat-dissipating plate being provided with a notch respectively;
- wherein each of the heat-dissipating plates overlaps with adjacent one heat-dissipating plate in a head-to-tail manner, so that the two notches of each heat-dissipating plate form an intake notch channel and an exhaust notch channel respectively, the curved dividing strips form an intersecting structure on upper and lower sides of each through-hole respectively to thereby define a plurality of multi-direction sub-channels for allowing the cooling liquid to flow through, and the cooling liquid flows from the intake notch channel into the multi-direction sub-channels and exits via the exhaust notch channel.
20. The liquid-cooling heat sink according to claim 19, wherein one of the notches is curved, and the curved dividing strips are arranged at intervals to follow the profile of the curved notch, thereby defining a plurality of curved through-holes.
21. The liquid-cooling heat sink according to claim 19, wherein the two notches are provided on two opposite ends of each heat-dissipating plate.
22. The liquid-cooling heat sink according to claim 19, wherein the intake pipe and the exhaust pipe are provided on the top of the cover.
23. The liquid-cooling heat sink according to claim 19, wherein the intake pipe is provided on the top of the cover, and the exhaust pipe is provided on one side edge of the cover.
24. The liquid-cooling heat sink according to claim 19, wherein the intake pipe and the exhaust pipe are provided on both side edges of the cover.
Type: Application
Filed: Oct 4, 2011
Publication Date: Apr 5, 2012
Applicant:
Inventor: Chia-Chun CHENG (New Taipei City)
Application Number: 13/252,980
International Classification: F28F 9/00 (20060101); F28F 7/00 (20060101);