DE20112785U1 - Closure construction of a heat pipe-shaped cooling plate - Google Patents

Description

TIMER.&

PATENT ATTORNEYS · EUROPEAN PATENT AND TRADEMARK ATTORNEYS

PO BOX 26 02 51 TELEPHONE: +49-89-22 18 06 HERRNSTRASSE

D-80059 MUNICH FAX: +49-89-22 26 27 D-80539 MUNICH

CHEN, Yang Shiau

4Fl., No. 39, Fu-Kang St.

Taipei Taiwan, R.O.C.

and

Glacialtech, Inc.

9Fl., No. 352, lake. 2, Jungshan Rd.

Junghe City, Taipei

Taiwan, R.O.C.

Closure construction of a heat pipe-shaped cooling plate Description

The present invention relates to a closure structure of a heat pipe-shaped heat sink, and more particularly to a closure structure of a heat pipe-shaped heat sink which distorts an angle formed between a passage and a hole by a plug by a pressing process to ensure a closed space formed in the passage without damage.

It is known that a computer CPU device generates a high temperature during operation, and the faster the operating speed, the higher the power consumption. If the operating temperature of a computer CPU device is too high, its function will be affected and there is a risk of the computer breaking down. If the heat dissipation problem cannot be solved, the operating speed of a computer CPU device will be greatly limited. Therefore, a computer CPU device with an even faster operating speed cannot be developed.

A conventional heat sink of a computer CPU device is essentially a conventional heat sink, i.e. a majority of fins are built on an aluminum support plate and this aluminum support plate is stacked on a computer CPU device so that it first absorbs the heat of this computer CPU device and further transfers the absorbed heat into the fins. Finally, these fins can serve as a heat exchange with the cooling air to be able to lower the temperature of a computer CPU device.

When a conventional heatsink of a computer CPU device is used in a desktop computer, an electric fan can be equipped for faster heat exchange between the heatsink and the cooling air to enable faster heat dissipation of the computer CPU device, since a printed circuit board motherboard of a desktop computer has a larger space for accommodating an electric fan.

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On the contrary, an electric fan cannot be used in a so-called notebook computer due to a smaller housing space of a motherboard with a shifted circuit. Therefore, an electric fan for accelerating heat dissipation speed of a CPU device cannot be used in a so-called notebook computer.

Due to the above mentioned space limitation, the heat dissipation problem of a computer CPU device cannot be solved by using the above mentioned electric fan. If the temperature of a computer CPU device can be transferred in a larger space, the heat dissipation problem can be solved easily. To solve such a problem, it is known to combine a heat sink with the computer case made of Bondur (aluminum-magnesium alloy) to allow the heat to be transferred outside. However, after actual testing, the temperature reduction function is poorly limited because the heat is not able to be transferred quickly and effectively on the computer case made of Bondur. For this reason, the

Deal with heat dissipation problem first in designing a heat sink for a computer CPU device.

It is known that the thermal conductivity of a heat pipe (so-called "thermal superconductor") is higher than 10000 W/m ° K and even 30 times higher than that of copper (thermal conductivity of copper is 360 W/m ° K). Due to the advantageous properties of a simple, light and reliable construction of a heat pipe, it is now an indispensable component for satellite or spacecraft equipment. For this reason, when developing the construction of a heat sink according to the present invention, it is considered to combine a heat pipe with a heat sink so that a heat pipe with a high thermal conductivity can be used in the field of the heat sink of a computer CPU device to enable better thermal conductivity.

As can be seen in Fig. 3 and 4, the above-mentioned conventional heat pipe-shaped cooling plate essentially consists of a plurality of guide fins (11)

and a support plate (12), wherein the guide ribs (11) are formed on the support plate (12) for the purpose of heat dissipation, and the support plate (12) is placed on an object to be heat dissipated. In the middle of the support plate (12) there is a hollow tube-shaped passage and a closed space is formed by sealing both plugs (14) located at both ends of the passage (13). The said closed space consists of a capillary structure and a cooling water source in order to be able to be formed together with the support plate (12) in a heat pipe construction.

After the support plate (12) has absorbed the heat of the object to be heat dissipated, it can quickly and independently transfer this heat further into the guide fins (11) and this heat is quickly dissipated by the guide fins (11).

However, the disadvantage of the above-mentioned known designs is that the pressing method for sealing plugs in the passage cannot ensure perfect sealing of the closed space due to possible dimensional deviations. In fact, plugs fatigue after a long period of repeated cold-hot heat exchange, so that both the heat absorption capacity and the thermal conductivity of the cooling plate are significantly reduced. Another method for fastening the sealing plug of a conventional heat pipe-shaped cooling plate requires turning work in order to screw the two sealing plugs onto the two ends of the passage of the support plate, so that the interior of the passage can be designed in a closed space. However, such a fastening method using threads is only suitable for a circular passage, so such a fastening method is limited as described above. In addition, such a conventional fastening method needs to turn screw threads on the passage and the sealing plug in order to be able to screw these two parts tight. This requires difficult and slow turning work and also increases the production costs.

The invention is therefore based on the important task of designing a closure structure of a heat pipe-shaped cooling plate of the type described above in such a way that

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that the two plugs mentioned above are sealed in the two holes of the passage so that the two angle parts can be distorted by a pressing effect in order to avoid any damage to the closed space formed by the passage.

The invention is based on a further object of designing a closure structure of a heat pipe-shaped cooling plate of the type described at the outset in such a way that the two plugs are pressed very precisely into the two holes of the passage by means of a pressing process, so that the design of the passage, the two holes and the two sealing plugs can be carried out without limit, thus enabling faster mechanical processing.

The tasks set are solved by the features specified in the protection claims.

The subject matter of the invention is shown by way of example in the drawing. Fig. 1 shows a schematic representation of the invention in the state in which the two plugs are pressed into the two holes of the passage;

Fig. 2 is a schematic representation of the invention in assembled arrangement; Fig. 3 is a perspective representation of a conventional heat pipe-shaped

Cooling net and
Fig. 4 is a sectional view of a conventional heat pipe-shaped cooling plate.

A closure structure of a heat pipe-shaped cooling plate essentially consists, as can be seen in Fig. 1 and Fig. 2, of a support plate (21) placed on an object to be heat-dissipated and a plurality of guide ribs (22) arranged on the outside of the support plate (21), wherein this support plate (21) is designed in the form of a heat pipe and has a closed space in capillary design with recooling water, and a hole (24) with a larger diameter widens on each of the two ends of the passage (23) located in the middle of this heat pipe, namely an angle piece (25) is designed between the passage (23) and the hole (24). In order to create advantageous design conditions, it is proposed that the

the above-mentioned hole (24) is sealed with a plug (26) by means of a pressing process, so that the passage can be formed in a closed space in capillary design with cooling water, thus enabling the support plate (21) to be designed in the form of a heat pipe.

The material hardness of the above-mentioned plug (26) is higher than that of the support plate (21), and the plug (26) has an annular groove for forming a pressure reduction area (27) in order to be able to absorb the gases and burrs generated during the pressing process. When the end of the plug (26) facing the hole is further pressed over until it reaches the stop of the above-mentioned angle piece (25), the angle piece (25) is distorted due to a pressing effect. This makes it difficult for a gas to penetrate along the inner wall of the hole (24) and thus damage to the closed space formed by the passage (23) can be avoided.

In addition, the two plugs (26) are pressed precisely into the two holes (24) of the passage (23) by means of a pressing process, so that the design of the passage (23), the two holes (24) and the two sealing plugs (26) can be carried out in unlimited ways, for example in square, circular, oval and/or other designs, thus enabling faster machining work.

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A closure structure of a heat pipe-shaped cooling plate is described, which essentially consists of a support plate placed on an object to be heat-dissipated and a plurality of guide ribs arranged on the outside of the support plate, wherein this support plate is designed in the form of a heat pipe and has a hole with a larger diameter on each of the two ends of the passage located in the middle of this heat pipe, and an angle piece is designed between the passage and the hole. In order to create advantageous design conditions, it is proposed that the above-mentioned hole be sealed with a plug by means of a pressing process and that this plug has an annular groove for forming a pressure reduction area in order to be able to absorb the gases and burrs generated during the pressing process. When the end of the plug facing the hole is reached by pressing until the stop of the above-mentioned angle piece, the angle piece is distorted due to a pressing effect. This can prevent damage to the closed space formed by the passage.

Claims (3)

1. A closure structure of a heat pipe-shaped cooling plate, which essentially consists of a support plate placed on an object to be heat-dissipated and a plurality of guide ribs arranged outside on the support plate, this support plate being designed in the form of a heat pipe and having a closed space in capillary design with recooling water in it in order to be able to quickly absorb and further transfer the heat absorbed by the heat-dissipating object, characterized in that a hole with a larger diameter is provided on each of the two ends of the passage located centrally in this heat pipe and an angle piece is designed between the passage and the hole; that the angle piece is distorted by a pressing effect and by means of the distorted angle pieces a closed room is made in the passage. 2. Closure structure of a heat pipe-shaped cooling plate according to claim 1, characterized in that the plug has an annular groove for forming a pressure reduction area in order to enable the gases and burrs generated during the pressing process to be absorbed. 3. Closure structure of a heat pipe-shaped cooling plate according to claim 1, characterized in that the heat pipe structure is arranged on a support plate.