CN203083411U - Thin heat pipe structure - Google Patents

Abstract

A thin heat pipe structure comprises: a hollow tube body and a mesh capillary structure, the mesh capillary structure is arranged in the tube body, a jig is arranged in the mesh capillary structure, the tube body is sintered so that the mesh capillary structure is sintered on the inner wall and the jig is taken out, the tube body is evacuated and filled with working fluid, and the tube body is sealed and mechanically processed to be flat; so that the mesh capillary structure can be completely attached to the inner wall of the tube body, thereby maintaining the integrity of the tube body and the integrity of the vapor-liquid circulation channel inside the heat pipe.

Description

Thin heat pipe structure

technical field

The utility model relates to a thin heat pipe structure, in particular to a thin heat pipe which can avoid affecting heat conduction efficiency due to pressure deformation of a mesh capillary structure. the

Background technique

The apparent thermal conductivity of the heat pipe is several times to tens of times that of metals such as copper and aluminum, and is quite excellent, so it is used as a cooling element for various heat countermeasures related equipment. In terms of shape, heat pipes can be divided into round pipe-shaped heat pipes and planar-shaped heat pipes. In order to cool parts to be cooled in electronic equipment such as CPUs, it is preferable to use a planar heat pipe for heat dissipation from the viewpoint of being easy to install on the part to be cooled and obtaining a wide contact area. With the miniaturization and space saving of the cooling mechanism, in the case of the cooling mechanism using a heat pipe, it is necessary to further reduce the thickness of the heat pipe. the

In other words, a space is provided inside the heat pipe as a flow path for the working fluid, and the working fluid accommodated in the space transfers heat through phase change and movement such as evaporation and condensation. Next, the operation of the heat pipe will be described in detail. The heat pipe has a sealed cavity, and transfers heat by phase change and movement of a working fluid contained in the cavity. the

Therefore, the industry uses heat pipes as heat-conducting elements. The heat pipes are pierced or embedded with heat dissipation fins, and the low-boiling-point working liquid filled in the heat pipes absorbs heat and evaporates at the heat-generating electronic components (evaporation end), and moves to the heat dissipation fins. The cooling fins (condensing end) transfer the heat generated by the heating electronic components to the cooling fins, and use the cooling fan to take away the generated heat to complete the cooling of the electronic components. the

Moreover, there are many manufacturing methods for heat pipes at present, for example, filling metal powder into a hollow tube body, and forming a capillary structure layer on the inner wall of the hollow tube by sintering the metal powder, and then Vacuumize the tube body and fill it with working fluid, and finally seal the tube, or put a mesh capillary structure in the hollow tube body, and sinter the mesh capillary structure body in the hollow tube body The wall forms a capillary structure layer, and then the tube body is evacuated and filled with working fluid and finally sealed. However, due to the thinning requirements of electronic equipment, the heat pipe needs to be made thin. the

Please refer to Fig. 1, which is a cross-sectional view of a known thin heat pipe. In the known technology, a mesh-like capillary structure 12 is built into a hollow tube body 11, and then the hollow tube body 11 is flattened into a flat shape. Injecting the working fluid and carrying out vacuuming and tube sealing operations, although it can make the hollow tube body 11 into a flat shape, but when the reticular capillary structure 12 is placed on the inner wall of the hollow tube body 11 and pressurized into a flat shape, The mesh capillary structure 12 is not completely attached to the inner wall of the hollow tube body 11, and even the junction of the mesh capillary structure body 12 will appear to be separated from the inner wall, so that the hollow tube body 11 is flattened into a flat shape. The reticular capillary structure 12 will be deformed, so that it cannot be completely attached to the inner wall of the hollow tube 11, or even the phenomenon of detachment occurs, which will affect the flattening of the hollow tube 11 and the same The integrity of the vapor-liquid circulation channel inside the heat pipe will cause its heat conduction efficiency to deteriorate. the

Therefore known technology has following shortcoming:

1. The mesh capillary structure will be deformed;

2. Affect the integrity of the flattening of the hollow tube body;

3. Affect the integrity of the vapor-liquid circulation channel inside the heat pipe;

4. Poor thermal conductivity. the

Utility model content

The main purpose of the utility model is to provide a thin heat pipe structure which can avoid the heat conduction efficiency being affected by the deformation of the mesh capillary structure due to pressure. the

Another object of the present invention is to provide a thin heat pipe structure capable of maintaining the integrity of the pipe body and maintaining the integrity of the vapor-liquid circulation channel inside the heat pipe to improve heat conduction efficiency. the

In order to achieve the above purpose, the utility model proposes a thin heat pipe structure, comprising: a hollow pipe body and a mesh capillary structure; the mesh capillary structure is arranged in the pipe body; a jig is arranged in the mesh capillary structure; The tube body is sintered to sinter the mesh capillary structure on the inner wall and the fixture is taken out; the tube body is pressurized into a flat shape; the tube body is vacuumed and filled with working fluid; the tube body is mechanically processed closed. the

Preferably, for the thin heat pipe structure, the mechanical processing is completed by one of stamping processing and rolling processing. the

Preferably, in the thin heat pipe structure, the jig is arranged in the net-like capillary structure, and the net-like capillary structure is effectively and closely attached to the inner wall of the tube body through the jig. the

Preferably, in the thin heat pipe structure described in item 1, the tube body is pressurized into a flat shape, and the mesh-like capillary structure in the tube body is attached to the tube body and is flat or flat. the

Through the thin heat pipe structure of the present utility model, the net-like capillary structure can be completely attached to the inner wall of the pipe after being pressed into a flat (flat) thinned shape, and the integrity of the pipe body and the interior of the heat pipe can be maintained. The integrity of the vapor-liquid circulation channel prevents the mesh capillary structure from being out of contact with the inner wall of the tube due to pressure deformation, thereby affecting the heat conduction efficiency, so that the heat pipe can be thinned and the heat conduction efficiency is greatly improved. the

Description of drawings

Fig. 1 is a sectional view of a known thin heat pipe;

Fig. 2 is the step flowchart of thin heat pipe structure of the present invention;

Fig. 3 is the implementation schematic diagram one of thin heat pipe structure of the present invention;

Fig. 4 is the implementation schematic diagram two of thin heat pipe structure of the present invention;

Fig. 5 is the implementation schematic diagram three of thin heat pipe structure of the present invention;

Fig. 6 is the implementation schematic diagram four of thin heat pipe structure of the present invention;

Fig. 7 is the implementation schematic diagram five of the thin heat pipe structure of the present invention;

Fig. 8 is the implementation schematic diagram six of the thin heat pipe structure of the present invention;

FIG. 9 is a schematic three-dimensional cross-sectional view of the thin heat pipe structure of the present invention. the

Description of main component symbols

Tube 2

Chamber 21

Reticular capillary structure 3

Fixture 4

Stamping processing tools 5

Detailed ways

The above-mentioned purpose of the utility model and its structural and functional characteristics will be described according to the preferred embodiments of the accompanying drawings. the

Please refer to Fig. 2 and Fig. 3 to Fig. 9 respectively, which are the flow chart of the steps of the thin heat pipe structure of the present invention, the implementation schematic diagram and the three-dimensional cross-sectional schematic diagram, and the thin heat pipe structure includes:

Please refer to Fig. 2 and shown in Fig. 3, S1: provide a kind of hollow pipe body and a mesh capillary structure; Prepare a hollow pipe body 2 and a mesh capillary structure 3, described hollow pipe body 2 and mesh The capillary structure 3 is a metal material with good thermal conductivity, such as copper or aluminum, or any metal with good thermal conductivity. In this embodiment, copper is used as an illustration but not limited thereto. the

Please refer to Fig. 2 and shown in Fig. 4, S2: set the reticular capillary structure in the tube body; the reticular capillary structure 3 is at first sheet-like, so take the reticular capillary structure 3 of appropriate width and length as Conform to the inner diameter of the tube body 2, and in this embodiment, its net-like capillary structure 3 is crimped and the two ends are joined but not overlapped with each other after crimping, as an illustration but not as a limitation, and then it is The net-like capillary structure 3 penetrates into the cavity 21 of the tube body 2 , and the net-like capillary structure 3 will expand and stick to the inner wall of the tube body 2 after being placed in the cavity 21 . the

Please refer to Fig. 2 and Fig. 5, S3: provide a jig and arrange the jig in the net-like capillary structure; prepare a jig 4, the net-like capillary structure 3 will stretch after being inserted into the tube body 2 Open and attach to the inner wall of the tube body 2, and the jig 4 uses the width of the jig 4 in accordance with the inner diameter of the reticular capillary structure 3 in this embodiment, so that the jig 4 is set in the reticular capillary structure 3 The net capillary structure 3 will be completely attached to the inner wall of the tube body 2 tightly. the

Please refer to Fig. 2 and Fig. 6, S4: sinter the pipe body so that the mesh capillary structure is sintered on the inner wall and take out the jig; at this time, it can be inserted into the mesh capillary structure 3 and the treatment tool The tube body 2 with tool 4 is sintered. After the tube body 2 is sintered, the internal network capillary structure 3 is completely attached to the inner wall, and then the jig 4 in the network capillary structure 3 is taken out. the

Please refer to Fig. 2 and Fig. 7, shown in Fig. 8, S5: apply mechanical processing to pressurize this pipe body and make flat (flat) shape; ) shape, the mechanical processing can be any one of stamping tool 5 and rolling tool. The body 2 is pressed into a flat shape, and the reticular capillary structure 3 inside the tube body 2 is made into a flat shape at the same time as the tube body 2, and the reticular capillary structure 3 is also closely attached to the tube body 2 in the tube body 2 the inner wall. the

S6: vacuumize the tube body and fill it with working fluid; vacuumize and fill the chamber 21 of the flattened tube body 2 with working fluid. the

S7: closing the tube body. Finally, the open end of the tube body 2 that is evacuated and filled with working fluid is closed. the

In addition, another step process (not shown in the figure) of the thin heat pipe structure of the present invention, its S1-S4 remain unchanged, only the step S5 is changed to vacuumize first and fill in the working fluid, and then execute the step S6 to seal the tube body , Carry out 57 steps again at last and apply machining to this pipe body and make flat (flat) shape. the

Thereby, the thin heat pipe structure of the utility model can make its net-like capillary structure fully adhere to the inner wall of the pipe after it is pressurized into a flat shape, and maintain the integrity of the pipe body and maintain the vapor-liquid circulation channel inside the heat pipe Integrity, so as to avoid the effect of the mesh capillary structure from affecting the heat conduction efficiency due to pressure deformation, so that the heat pipe can be thinned and the heat conduction efficiency can be greatly improved. the

Although the present utility model is disclosed as above in terms of implementation, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, this The scope of protection of the utility model shall be subject to the scope of the appended patent application. the

Claims (4)

1. A thin heat pipe structure, characterized in that, comprising: A hollow tube body and a mesh capillary structure; The mesh capillary structure is set in the tube body; A jig is set in the mesh capillary structure; The tube body is sintered to sinter the mesh capillary structure on the inner wall and the jig is taken out; The tube body is pressurized into a flat shape; The tube body is evacuated and filled with working fluid; The tube body is closed by machining. the 2 . The thin heat pipe structure according to claim 1 , wherein the mechanical processing is completed by one of stamping processing and rolling processing. 3 . the 3. The thin heat pipe structure according to claim 1, wherein the jig is arranged in the mesh capillary structure, and the mesh capillary structure is effectively and tightly attached to the pipe body through the jig. inner wall. the 4. The thin heat pipe structure according to claim 1, characterized in that, the tube body is pressurized into a flat shape, and the reticular capillary structure in the tube body is attached to the tube body and is flat or flat . the

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