CN204836936U - Heat sink - Google Patents

Abstract

A heat dissipation device is provided with a base and a plurality of heat dissipation fins fixed on the base, the base and the heat dissipation fins are integrally formed; the base is provided with a plurality of heat dissipation channels, so The two ends of the base are sealed and the inside of the base is in a vacuum state. The inner wall of each heat dissipation channel is provided with a capillary function layer arranged regularly or irregularly, and each heat dissipation channel is filled with a liquid working medium. The heat dissipation channel is provided with an integrally formed sawtooth surface, and part or all of the surface of the sawtooth surface is provided with capillary functional layers arranged regularly or irregularly. The serrated surface has a plurality of teeth, and the cross section of the teeth is triangular, rectangular, semicircular, arc or other irregular shapes. The liquid working medium is water or cold medium. The heat dissipation device of the utility model adopts an integrally formed base with heat dissipation fins, and a heat dissipation channel equipped with a liquid working medium, a cold medium or water is arranged in the base, which is not only easy to prepare, but also has a good heat dissipation effect.

Description

a cooling device

technical field

The utility model relates to the technical field of heat dissipation of electronic products, in particular to a heat dissipation device.

Background technique

Good heat dissipation performance is an important guarantee to ensure the effective operation of electronic products. Electronic products usually use heat sinks made of aluminum or copper for heat dissipation, and some larger products are also cooled by liquids such as water or other cooling fluids. However, with the gradual miniaturization of electronic products, the volume of the cooling device is required to be smaller and smaller, and the traditional cooling device can no longer meet the requirements.

In the prior art, for the heat dissipation of electronic products such as CPU, LED, etc., heat dissipation is also carried out through heat sinks, but the heat dissipation effect of this method is still limited.

Therefore, aiming at the shortcomings of the prior art, it is very necessary to provide a heat dissipation device with good heat dissipation performance to overcome the shortcomings of the prior art.

Contents of the invention

The purpose of the utility model is to avoid the deficiencies of the prior art and provide a heat dissipation device with a good heat dissipation effect.

The purpose of this utility model is achieved through the following technical measures.

A heat dissipation device is provided, which is provided with a base and a plurality of heat dissipation fins fixed on the base, and the base and the heat dissipation fins are integrally formed;

The inside of the base is provided with a plurality of heat dissipation channels, the two ends of the base are sealed and the inside of the base is in a vacuum state, and the inner wall of each heat dissipation channel is provided with capillary function layers arranged regularly or irregularly. Liquid working medium is filled in each cooling channel.

Preferably, the heat dissipation channel is provided with an integrally formed sawtooth surface, and part or all of the surface of the sawtooth surface is provided with capillary functional layers arranged regularly or irregularly.

Further, the serrated surface has a plurality of teeth, and the cross-section of the teeth is triangular, rectangular, semicircular, arc or other irregular shapes.

Further, the shapes of the teeth constituting the serrated surface are the same or different, and the teeth constituting the serrated surface are the same or different in size.

Further, the capillary functional layer is a capillary functional layer made of metal powder with a rough surface structure.

Further, the capillary functional layer is a capillary functional layer made of copper powder with a rough surface structure.

In the heat dissipation device described above, the liquid working medium filled in each heat dissipation channel is water or a cold medium.

The above heat dissipation channels are arranged at equal intervals or arranged at unequal intervals, and the specifications of the heat dissipation channels are the same or different.

The heat dissipation channel has two sawtooth surfaces parallel up and down, and each sawtooth surface is arranged regularly or irregularly.

The two ends of the above-mentioned base are press-fitted and hermetically connected or connected by laser welding.

The heat dissipation device of the present utility model is provided with a base and a plurality of heat dissipation fins fixed on the base, the base and the heat dissipation fins are integrally formed; the base is provided with a plurality of heat dissipation channels , the two ends of the base are sealed and the inside of the base is in a vacuum state, the inner wall of each heat dissipation channel is provided with a capillary function layer arranged regularly or irregularly, and each heat dissipation channel is filled with liquid working fluid . The heat dissipation device of the present utility model adopts an integrally formed base with heat dissipation fins, and a heat dissipation channel equipped with a liquid working medium, a cold medium or water in a vacuum state is provided in the base, which is not only convenient to prepare, but also The cooling effect is good.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the content in the accompanying drawing does not constitute any limitation to the utility model.

Fig. 1 is a structural schematic diagram of a heat dissipation device of the present invention.

Fig. 2 is a schematic cross-sectional view of a heat dissipation device of the present invention.

Fig. 3 is an enlarged view of area A in Fig. 2 .

Fig. 4 is a schematic cross-sectional view of Embodiment 3 of a heat dissipation device of the present invention.

Fig. 5 is an enlarged view of area B in Fig. 4 .

6 is a schematic cross-sectional view of a heat dissipation channel of the heat dissipation device of the present invention.

7 is a schematic cross-sectional view of another heat dissipation channel of the heat dissipation device of the present invention.

In Figures 1 to 7, including:

Base 100,

heat dissipation channel 110, serrated surface 120, teeth 121,

heat dissipation fins 200 .

Detailed ways

The utility model will be further described in conjunction with the following examples.

Example 1.

A heat dissipation device, as shown in Figures 1 to 3, is provided with a base 100 and a plurality of heat dissipation fins 200 fixed on the base 100 arranged in parallel, and the base 100 and the heat dissipation fins 200 are integrally formed .

The integrally formed structure of the base 100 and the heat dissipation fins 200 avoids the process of welding the separately prepared base 100 and heat dissipation fins 200 in the prior art, and has the characteristics of convenient preparation and precise fixing position.

The inside of the base 100 is in a vacuum state. There are multiple cooling channels 110 inside the base 100 .

It should be noted that the plurality of heat dissipation channels 110 may be connected to each other sequentially or only partially connected to each other, or may not be connected to each other. Sequentially communicating with each other means that two adjacent heat dissipation channels communicate with each other, so that the cavity between the connected heat dissipation channels constitutes the entire inside of the base 100 . If the heat dissipation passages are only partially connected, the base 100 is a cavity structure formed by a plurality of heat dissipation passages. If the heat dissipation channels 110 are not connected to each other, the cavity of each heat dissipation channel constitutes the interior of the base 100 as a whole.

In this embodiment, the cooling channels 110 have the same specification and are arranged at equal intervals. It should be noted that the cooling channels may also be arranged at non-equal intervals. The specifications of the cooling channels can also be set to be the same or different.

The inner wall of each cooling channel 110 is provided with regularly or irregularly arranged capillary functional layers, and each cooling channel is filled with liquid working medium. When the base is heated, the liquid working medium at the heating end of the heat dissipation channel 110 corresponding to the heated part is heated and vaporized, and the vaporized gas moves to the far end of the heat dissipation channel, and the gas is pre-cooled and liquefied at the remote end of the heat dissipation channel 110, and the liquefied liquid working medium is The function of the capillary function layer gradually returns from the far end to the heating end, and the cycle continues accordingly, so as to transfer heat from the heating end to the far end and dissipate it through the cooling fins.

Specifically, the capillary functional layer is a capillary functional layer composed of metal powder with a rough surface structure, preferably copper powder.

Specifically, the liquid working medium filled in each cooling channel 110 is specifically a cooling medium, preferably a liquid cooling medium. The function of the cooling medium in the heat dissipation channel 110 can accelerate the heat dissipation efficiency. Refrigerant is a substance that easily absorbs heat and turns into gas, and easily releases heat and turns into liquid. There are many kinds of raw materials used as refrigerant medium, such as freon, chlorofluorocarbon, etc., which will not be repeated here.

In order to improve the heat dissipation effect, the heat dissipation channel 110 is provided with a serrated surface 120 . The setting of the serrated surface 120 can increase the heat dissipation area and improve the heat dissipation efficiency. Part of the surface of the sawtooth surface 120 is provided with regularly or irregularly arranged capillary functional layers. The sawtooth surface 120 has a plurality of teeth 121 , and the cross section of the teeth 121 is triangular, as shown in FIG. 2 and FIG. 3 .

Specifically, in this embodiment, the heat dissipation channel 110 has two sawtooth surfaces 120 parallel up and down, so as to obtain the largest heat dissipation area as possible. It should be noted that the sawtooth surface 120 is not limited to the upper and lower parallel structure in this embodiment, and may also be set as a non-parallel structure or other irregular structures.

When the heat dissipation device is in use, the side of the base 100 without the heat dissipation fins 200 is assembled on a heat source such as a circuit board. The substance is heated and gasified, the gasification gas moves to the far end of the heat dissipation channel, and the gas is pre-cooled and liquefied at the far end of the heat dissipation channel, and the liquefied liquid working medium gradually returns from the far end to the heating end due to the action of the capillary function layer, and continues to circulate accordingly , to transfer heat from the heated end to the heat dissipation fins 200 and dissipate it through the heat dissipation fins 200 . The sawtooth surface 120 of the heat dissipation channel 110 is provided to improve heat dissipation efficiency.

To sum up, the heat dissipation device of the present invention has the characteristics of convenient preparation, simple structure and good heat dissipation effect.

Example 2.

A heat dissipation device, the other structure is the same as that of Embodiment 1, the difference is that: the entire surface of the sawtooth surface is provided with capillary functional layers arranged regularly or irregularly.

Through the capillary function layer, the drug effect can be used to transport heat, and the condensed liquid can be sent back to the original end through the capillary function layer, which has the characteristics of good heat dissipation effect.

Example 3.

A heat dissipation device, the other structure is the same as that of Embodiment 1 or 2, the difference is that: as shown in Figure 4 and Figure 5, the heat dissipation channels 110 are arranged at non-equal intervals, and the teeth 121 of the sawtooth surface in the heat dissipation channels are set as rectangle.

It should be noted that the cross-sectional shape of the teeth 121 is not limited to the rectangle in this embodiment, and can also be set as a triangle, a circle, an arc, a rectangle or other irregular shapes, and the teeth 121 constituting the serrated surface have the same shape Or not the same, the teeth 121 constituting the serrated surface 120 are the same or different in size, which can be flexibly selected and set according to specific needs. As shown in FIG. 6 , the sawtooth surface 120 is composed of teeth 121 with arc-shaped, triangular, isosceles trapezoidal, non-isosceles trapezoidal, and semicircular sections, and the spacing between the teeth 121 is different. FIG. 7 is a schematic diagram of the structure of the heat dissipation channel 110 with an elliptical cross-section and a sawtooth surface 120 composed of arc-shaped, triangular, isosceles trapezoidal, non-isosceles trapezoidal, and semicircular teeth 121 . Of course, Fig. 6 and Fig. 7 only use two examples for illustration, which can be flexibly set according to actual needs during use.

The heat dissipation device of the utility model has the characteristics of convenient preparation, simple structure and good heat dissipation effect.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should It is understood that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (10)

1. a heat abstractor, is characterized in that: be provided with pedestal, the multiple radiating fins be fixed on pedestal, and described pedestal and described radiating fin are formed in one structure;

Described base interior is provided with multiple heat dissipation channel, the two ends of described pedestal arrange in sealing and described base interior is vacuum state, each heat dissipation channel internal face is provided with the capillary function layer of rule or irregular alignment, is filled with liquid refrigerant in each heat dissipation channel.

2. heat abstractor according to claim 1, is characterized in that: described heat dissipation channel is provided with integrated serrated face, and the some or all of surface of described serrated face is provided with the capillary function layer of rule or irregular alignment.

3. heat abstractor according to claim 2, is characterized in that: described serrated face has multiple teeth, and the cross section of teeth is triangle, rectangle, semicircle, arc or other is irregularly shaped.

4. heat abstractor according to claim 3, is characterized in that: the shape forming the teeth of serrated face is identical or not identical, and the size forming the teeth of serrated face is identical or not identical.

5. heat abstractor according to claim 4, is characterized in that: described capillary function layer is the capillary function layer be made up of the metal dust with rough surface structure.

6. heat abstractor according to claim 5, is characterized in that: described capillary function layer is the capillary function layer be made up of the copper powders with rough surface structure.

7. the heat abstractor according to claim 1 to 6 any one, is characterized in that: liquid refrigerant filling in each heat dissipation channel is water or coolant media.

8. heat abstractor according to claim 7, is characterized in that: described heat dissipation channel is in spread configuration at equal intervals or in unequal interval spread configuration, the specification of described heat dissipation channel is identical or not identical.

9. heat abstractor according to claim 8, is characterized in that: described heat dissipation channel has two parallel up and down serrated faces, and each serrated face is in rule or irregular setting.

10. heat abstractor according to claim 9, is characterized in that: the two ends pressing sealing of described pedestal or laser welded seal connect.