Heat pipe

Abstract

The present invention discloses a heat pipe, it includes a metal tube which is equipped with a sealed chamber in itself, and the sealed chamber is filled with right amount of work fluid, the inner wall of the metal tube is equipped with capillary structure, the metal tube body is divided into evaporator section, condenser section and insulating section between said both along the length direction, the capillary structure includes the honeycomb first capillary structure installed on the insulating section of the metal tube and the second capillary structure installed on the evaporator section of the metal tube, the first capillary structure is made by metal thin slices, the bore diameter of the second capillary structure is smaller than the bore diameter of the first capillary structure. Said heat pipe is equipped with corresponding capillary structure through the requirements of the sections of heat pipes are corresponding with different capillary structures to use the best functions of the sections of heat pipe effectively.

Description

【Technical field】 [0001] The invention relates to a heat conduction device, in particular to a heat pipe. 【Background technique】 [0002] The heat pipe has the characteristics of ultra-quiet, fast heat transfer, high thermal conductivity, light weight, small size, no moving parts, simple structure and multi-purpose, and the heat pipe can quickly transfer a large amount of heat energy under the condition that the temperature remains almost constant. The role of superconductors is widely used; its basic structure is that the inner wall of the closed tube is lined with a capillary structure layer that is easy to absorb the working fluid, while the central space is in a hollow state, and the equivalent capillary structure is injected into the vacuumed closed tube. The working fluid in the total pore volume of the layer. [0003] The heat pipe can be divided into an evaporating section, a condensing section and an adiabatic section in between according to functions such as absor...

AI Technical Summary

Problems solved by technology

[0005] However, most of the existing heat pipes use a single capillary structure

However, the sintered powder type, wire mesh type, or fiber type are not easy to obtain a consistent capillary structure in the mass production process, and cannot effectively control the porosity and pore size that dominate the heat transfer performance, resulting in increased variability in the heat transfer performance of the heat pipe. And the reduction of efficiency also causes the reflux resistance of the condensed liquid to be large, so that the speed of the condensed liquid is slow and the maximum heat transfer of the heat pipe is reduced; the grooved capillary structure has the same pore size and the flow resistance can be effectively controlled, but its single-layer structure design The porosity of the grooved heat pipe cannot be effectively improved, so its working fluid content will be limited and affect the heat transfer performance of the heat pipe. In addition, the cross-sectional size of the groove on the inner wall of the grooved heat pipe hinders the design of the forming tool, and it is generally difficult to meet the working fluid of the heat pipe. The need for anti-gravity properties

Although some heat pipes currently use a composite capillary structure, most of the composite capillary structures of different forms are in the radial direction of the heat pipe, while the axial direction of the heat pipe is only a composite of different pore sizes and porosities of a single capillary structure.

Therefore, the existing heat pipes do not meet the requirements of different characteristics of the capillary structure corresponding to the different functions of different sections of the heat pipe, which makes it difficult for each section of the heat pipe to perform its functions at the same time, thereby affecting the heat conduction performance of the heat pipe.

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