CN214666252U - Ultra-thin heat pipe of embedded microetching support keel - Google Patents

Abstract

The utility model discloses an ultra-thin heat pipe with embedded micro-etching support keel, which comprises a red copper pipe shell and a support keel; the supporting keel is arranged in the red copper pipe shell; the supporting keel comprises grooves and bosses which are arranged alternately in sequence; copper powder is sintered on the surface of the groove, and the copper powder is sintered on the support keel to form a capillary structure. The utility model, through the arrangement of the supporting keel, the capillary structure is sintered on the supporting keel inside, and the pipe wall is not damaged by flattening; meanwhile, the boss of the supporting keel is in close contact with the pipe wall, so that the necessary mechanical strength in the production and assembly process can be provided.

Description

Ultra-thin heat pipe of embedded microetching support keel

Technical Field

The utility model belongs to the heat pipe field, concretely relates to ultra-thin heat pipe of embedded little etching support fossil fragments.

Background

The heat pipe (HeatPipe) is an element which realizes rapid heat transfer by means of the phase change of working liquid in the heat pipe, fully utilizes the heat conduction principle and the latent heat characteristic of a phase change medium, and can realize efficient heat transfer and transportation. A typical heat pipe is composed of a pipe shell, a wick, and a working liquid: the tube shell of the heat pipe is generally made of red copper, has relatively high heat conductivity coefficient and high ductility, and is beneficial to flattening or bending and shaping after welding and sealing. The interior of the pipe shell is pumped into a negative pressure state, and is filled with proper working liquid, the boiling point of the liquid is lower in the negative pressure state, the liquid is easy to boil and generate phase change after being heated, and the heat absorbed by the phase change is equal to the latent heat of the liquid. The inner wall of the tube shell is provided with a liquid absorbing core which is made of capillary porous materials, and generally comprises a copper powder sintering structure, a groove structure and a copper net structure. The end of the heat pipe close to the heat source is an evaporation end, and the end far away from the heat source is a condensation end. When heated, the liquid in the evaporation end is quickly evaporated to absorb heat, the vapor flows to the condensation end under a slight pressure difference, the heat is released from the condensation end and is condensed into liquid again, and the liquid flows back to the evaporation end along the porous material under the action of capillary force to form a cycle. By designing parameters such as vacuum degree and liquid filling amount in the heat pipe, the circulation can be rapidly repeated, and heat can be continuously conducted from the heating source to the radiator.

Under the trend that consumer electronic products are developed to be light, thin, portable, intelligent and multifunctional, the integration level and the power density of the consumer electronic products are synchronously increased, and ultrathin heat pipes with the thickness of less than 1mm and even 0.4mm are more and more widely applied. After the heat pipe is flattened, the working fluid is torn by the capillary structure for realizing the backflow, so that damage to different degrees is caused, and the maximum heat transfer capacity and the thermal resistance parameter of the heat pipe can be influenced. Meanwhile, for the ultrathin heat pipe with the thickness of 0.4mm, the wall thickness of a copper pipe is not more than 0.15mm, the mechanical strength is lower, the compression resistance and the deformation resistance are poor, and the system adaptability of the ultrathin heat pipe is reduced. Meanwhile, in order to ensure that the ultrathin heat pipe has certain mechanical strength, the diameter of the pipe shell is greatly limited, and the diameter of the pipe shell limits the maximum heat transfer capacity of the heat pipe, so that the heat transfer capacity of the heat pipe is limited, and the heat dissipation requirement of high-power devices with increasingly developed manufacturing processes and functions is difficult to meet.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide an ultra-thin heat pipe of embedded little etching support fossil fragments to the capillary structure who exists among the solution prior art receives the problem that destroys easily tearing, mechanical strength is low.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

an ultra-thin heat pipe with embedded micro-etching supporting keels comprises a red copper pipe shell and supporting keels; the supporting keel is arranged in the red copper pipe shell; the supporting keel comprises grooves and bosses which are arranged alternately in sequence; copper powder is sintered on the surface of the groove, and the copper powder is sintered on the support keel to form a capillary structure.

Furthermore, the red copper pipe shell is of a flat pipe-mounted structure.

Furthermore, copper powder is also sintered between the red copper tube shell and the lug boss.

Furthermore, the supporting keel is made of a red copper plate.

Furthermore, both sides of the supporting keel are provided with a plurality of grooves and bosses which are arranged alternately in sequence.

Furthermore, grooves on two sides of the supporting keel are symmetrically arranged; the bosses on the two sides of the support keel are symmetrically arranged.

Compared with the prior art, the beneficial effects of the utility model are that:

through the arrangement of the supporting keels, the capillary structures of the supporting keels are sintered on the supporting keels inside, and the supporting keels cannot be damaged due to flattening of the tube walls; meanwhile, the boss of the supporting keel is in close contact with the pipe wall, so that the necessary mechanical strength in the production and assembly process can be provided.

Drawings

FIG. 1 is a cross-sectional view of an ultra-thin heat pipe;

figure 2 is a schematic view of a support keel structure;

fig. 3 is a schematic view of the installation of the ultra-thin heat pipe.

Reference numerals: 1-red copper pipe shell; 2-supporting keel; 3-a capillary structure; 4-a groove; 5-boss.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.

Utility model as shown in fig. 1-3, an ultra-thin heat pipe of embedded little etching support fossil fragments, including red copper tube 1, support fossil fragments 2 and capillary structure 3, support fossil fragments 2 sets up in red copper tube 1, and support fossil fragments 2 is including alternate slot 4 and the boss 5 that sets up in proper order, and slot 4's surface sintering has the copper powder, forms capillary structure 3 on sintering support fossil fragments 2 with the copper powder, and red copper tube 1 is the tubular construction of flat. Copper powder is also sintered between the red copper tube shell 1 and the lug boss 5, a plurality of grooves 4 and lug bosses 5 which are sequentially alternated are arranged on both sides of the supporting keel 2, and the grooves 4 on both sides of the supporting keel 2 are symmetrically arranged; the bosses 5 on two sides of the support keel 2 are symmetrically arranged.

The red copper pipe shell 1 is initially a round pipe, and is pre-flattened after being cleaned, the supporting keel 2 is a red copper plate, a series of structures with grooves and bosses arranged alternately are etched through a micro-etching technology, the grooves are used as steam flow channels after working liquid is heated and boiled, and the bosses are used as supporting structures after the red copper pipe shell is flattened. The relative sizes of the groove and the boss need to be determined after parameter optimization according to the use scene of the ultrathin heat pipe. And then, sintering copper powder on the keel to form a capillary structure 3 serving as a channel for condensing the working liquid and then refluxing to an evaporation end by taking the supporting keel 2 as a substrate, finally, properly cleaning the supporting keel 2 containing the copper powder sintered structure, inserting the supporting keel into the pre-flattened red copper tube shell 1, and fixing the red copper tube shell 1 and the supporting keel 2 by using a jig so as to fix the relative positions. And then, carrying out secondary flattening operation on the red copper tube shell 1 to enable the inner wall of the tube shell to be in close contact with the boss part of the support keel 2, and applying pressure at the high temperature of 800-900 ℃ to enable the red copper tube shell 1 and the support keel 2 to be fixed through copper powder sintering of the boss part. And then carrying out conventional heat pipe production processes such as leakage detection, liquid filling, packaging, inspection and the like on the heat pipe.

By adopting the ultrathin heat pipe with the built-in supporting structure, the capillary structure of the ultrathin heat pipe is sintered on the supporting keel inside, and the ultrathin heat pipe cannot be damaged due to flattening of the pipe wall; meanwhile, the boss of the supporting keel is tightly contacted with the pipe wall, so that the necessary mechanical strength in the production and assembly process can be provided; in addition, the heat pipe adopting the support structure does not need to consider mechanical strength, so that the diameter of the pipe shell can be unlimited, the heat transfer capacity is higher, the area of the flattened plane is larger, the heat pipe is suitable for application scenes with larger areas of multiple heat sources or more concentrated multiple heat sources, and the heat pipe is expected to replace a uniform temperature plate (VaporChamber) with higher cost and more complex process.

It should be noted that, although the present invention has been described by the above embodiments, the present invention may have other various embodiments. Various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention, and it is intended that all such modifications and changes fall within the scope of the appended claims and their equivalents.

Claims (6)

1. An ultra-thin heat pipe with embedded micro-etching supporting keels is characterized by comprising a red copper pipe shell and supporting keels; the supporting keel is arranged in the red copper pipe shell; the supporting keel comprises grooves and bosses which are arranged alternately in sequence; copper powder is sintered on the surface of the groove, and the copper powder is sintered on the support keel to form a capillary structure.

2. The ultra-thin heat pipe with embedded microetching support keels as claimed in claim 1, wherein the copper pipe shell is a flat pipe-mounted structure.

3. The ultra-thin heat pipe with embedded micro-etched support keels as claimed in claim 1, wherein copper powder is also sintered between the copper pipe shell and the bosses.

4. The ultra-thin heat pipe with embedded micro-etched support keel as claimed in claim 1, wherein the material of the support keel is copper plate.

5. The ultra-thin heat pipe with embedded micro-etched support keel as claimed in claim 1, wherein both sides of the support keel are provided with a plurality of grooves and bosses which are sequentially spaced.

6. The ultra-thin heat pipe with embedded micro-etched support keel as claimed in claim 5, wherein the grooves at two sides of the support keel are symmetrically arranged; the bosses on the two sides of the support keel are symmetrically arranged.

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