Heat pipe structure

Abstract

A heat pipe structure comprises a main body, wherein the main body is provided with a cavity, the cavity is provided with a first side and a second side, the first side and the second side are respectively provided with a first capillary structure, a second capillary structure and working fluid, the size of the first capillary structure is greater than that of the second capillary structure but smaller than a half circumference of the inner wall of the cavity, the first capillary structure is connected with the cavity, and the first capillary structure and the cavity collectively define at least one steam passage. Through the heat pipe structure, the heat conduction quantity can be enhanced, and the heat conduction efficiency can be greatly improved.

Description

technical field [0001] A heat pipe structure, especially a heat pipe structure that can reduce thermal resistance pressure and greatly improve vapor-liquid circulation inside the heat pipe, thereby increasing heat transfer efficiency. Background technique [0002] With the increasing miniaturization and high performance of computers, smart electronic devices and other electrical equipment, this means that the heat transfer elements and heat dissipation elements used in them also need to be designed in the direction of miniaturization and thinning, so as to Meet the needs of users. [0003] A heat pipe is a heat conduction element with excellent heat conduction efficiency. Its heat transfer efficiency is several times or even tens of times higher than that of metals such as copper and aluminum, so it is used as a cooling element in various heat-related equipment. [0004] In terms of shape, heat pipes can be divided into heat pipes with round pipe shape, heat pipes with D-sh...

AI Technical Summary

Problems solved by technology

[0006] Although the flat heat pipe can achieve the purpose of thinning, another problem arises, because the flat heat pipe sinters the metal powder on the inner wall surface of the heat pipe body, so that the sintered body can completely cover the inner wall , so that when the flat heat pipe is pressurized, the capillary structure (that is, sintered metal powder or mesh capillary structure) inside the flat heat pipe located on both sides of the pressurized surface is easily damaged by extrusion, and then falls off from the inner wall of the flat heat pipe or deformation, so that the heat transfer efficiency of the thin heat pipe is greatly reduced or even disabled; in addition, although the flat heat pipe can achieve heat source conduction, but after the flat heat pipe is made thin, the internal capillary will be caused by the thinning purpose. The capillary force of the structure is insufficient, causing the working fluid to block the steam channel. Furthermore, because the flat heat pipe is thinned and processed, the area of ​​the flow channel in the tube is reduced, so the capillary force is reduced, resulting in a decrease in the maximum heat transfer rate. One of the main reasons is The overall thinning of the flat heat pipe leads to a decrease in the internal volume of the flat heat pipe. Another reason is that the thinner the flat heat pipe after flattening, the central depression is caused and the steam channel is closed and blocked.

[0007] Therefore, in order to solve the above-mentioned known shortcomings, the industry in this field inserts a mandrel into the inner chamber of the flat heat pipe, and the mandrel forms a specific slit shape along the axial direction, and the slit formed by the slit and the inner wall of the chamber The space is filled with metal powder and sintered to form a capillary structure. Finally, the mandrel is pulled out, and then the central part of the chamber where the capillary structure is located is pressurized to make a flat shape. The capillary structure and the flat part of the inner wall of the chamber Thermal contact, and gaps on both sides of the capillary structure in the chamber can be used as steam channels to obtain better steam channel impedance, but because of the narrow capillary cross-section, the capillary force is reduced, resulting in anti-gravity thermal efficiency and heat transfer efficiency If it is extremely poor, then this shortcoming is the key point that needs to be improved.

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