CN201122067Y - Heat pipe structure with double-layer capillary tissue - Google Patents

Abstract

A heat pipe structure with double-layer capillary structures, comprising: a tube body and a second capillary structure. A first capillary structure is provided on the inner wall of the tube body, and the first capillary structure is in the shape of a groove. The second capillary structure is provided on the surface of the first capillary structure with metal powder and forms an overlapping state, and the length of the second capillary structure is not greater than half the length of the tube body or the groove. Since the heated end of the heat pipe has the first capillary structure and the second capillary structure, the heated end has a good water retention effect, and the first capillary structure allows the liquid re-condensed at the cooling end to quickly flow back to the heated end.

Description

Heat pipe structure with double capillary structure

technical field

The utility model relates to a heat pipe, in particular to a composite heat pipe structure.

Background technique

With the vigorous development of multimedia technology, in order to enable electronic components (chips) to calculate huge amounts of data in a short period of time, it is necessary to increase the computing speed of electronic components. After the computing speed of the electronic components increases, the heat energy generated by the electronic components will also increase relatively. Therefore, it is necessary to have a high-conduction heat dissipation component to quickly remove the heat generated by the electronic components to ensure that the electronic components can be used. Normal operation and service life.

The currently used heat dissipation components are mainly heat pipes, and the inside of the heat pipes has capillary tissue and working fluid. When using a heat pipe, attach the heated end of the heat pipe to the surface of the electronic component or heat conduction block, the working fluid inside the heated end absorbs heat, vaporizes the working fluid, and gradually increases the air pressure at the heated end, so that the evaporated water vapor will flow to the heat pipe. The cold side with low pressure flows to create a vapor flow. After the steam releases heat at the cooling end, it recondenses into a liquid, and quickly returns to the heating end through the capillary tissue to complete a cycle of action. In this way, the working fluid inside the heat pipe continuously circulates, and the heat energy generated by the electronic components can be quickly removed.

The capillary structure inside the heat pipe can be distinguished in design as grooved, braided mesh or metal powder sintered. The working fluid inside the heating end of the heat pipe flows to the cooling end due to heat absorption and evaporates water vapor to release heat energy, and recondenses to form a liquid, and then quickly returns to the heating end through the groove-shaped capillary tissue. Although the grooved capillary allows the liquid at the cooling end to quickly return to the heated end, the grooved capillary at the heated end has poor stagnation (condensation) effect, which reduces the heat-absorbing area or area of the heated end. However, the capillary formed by woven mesh or metal powder has a good water stagnation effect on the heated end, and also increases the heat-absorbing area or area, allowing the heated end to absorb more heat energy. However, after the evaporated water vapor flows to the cooling end to release heat energy and recondense the liquid, the capillary structure formed by the woven mesh or metal powder makes the recondensed liquid return to the heating end at a slower speed, which affects the heat dissipation efficiency.

Therefore, how to quickly return the recondensed liquid at the cooling end of the heat pipe to the heating end, and how to make the capillary at the heating end have a good water stagnation effect is the main problem to be solved by the present invention.

Utility model content

The main purpose of the utility model is to propose a composite heat pipe structure. The composite heat pipe structure uses two different capillary structures to overlap together, so that the heated end of the heat pipe has a good water stagnation effect, and at the same time, the liquid recondensed at the cooling end can also quickly return to the heated end.

In order to achieve the above-mentioned purpose, the heat pipe structure of the double-layer capillary structure of the present invention includes: a tube body, the tube body has a cooling end and a heating end, and the inner wall is provided with a first capillary structure; the second capillary structure is located at On the surface of the first capillary structure on the inner wall of the heated end, the length of the second capillary structure is not greater than half of the length of the first capillary structure.

According to the heat pipe structure with double-layer capillary structure provided by the utility model, by overlapping two different capillary structures, not only the heating end of the heat pipe has a good water stagnation effect, but also the recondensed liquid at the cooling end It can also be quickly reflowed to the heated side.

Description of drawings

Fig. 1 is a schematic side sectional view of a heat pipe with a double-layer capillary structure of the present invention;

Fig. 2 is a cross-sectional schematic diagram of the heat pipe shown in Fig. 1 along 2-2;

Fig. 3 is a cross-sectional schematic diagram of the heat pipe shown in Fig. 1 along 3-3;

Fig. 4 is a schematic cross-sectional view of a heat pipe with a double-layer capillary structure of the present invention;

Fig. 5 is a side cross-sectional schematic diagram of the flow of working fluid inside the heat pipe of the double capillary structure of the present invention.

[Description of main component symbols]

Tube 1

cooling end 11

Heating end 12

First Capillary 2

Strip 21

Groove 22

Second Capillary 3

particle 31

Slit 32

Steam 4

Liquid 5

Detailed ways

Below in conjunction with accompanying drawing, the technical content of the present utility model is described in detail.

Figures 1, 2 and 3 are the side sectional view of the heat pipe of the double-layer capillary structure of the present invention, the sectional view at the position 2-2 of Fig. 1 and the schematic sectional view of the sectional view at the position 3-3 of Fig. 1, respectively. As shown in the figure: the heat pipe structure of the double-layer capillary structure of the present invention includes: a tube body 1 , a first capillary structure 2 and a second capillary structure 3 . in:

The tube body 1 is a circular hollow cylinder made of metal material.

The first capillary tissue 2 is disposed on the inner wall of the tube body 1 , and is formed by a plurality of square strips 21 disposed on the inner wall of the tube body, and a groove 22 is formed between every two strips 21 .

The second capillary structure 3 is provided on the surface of the first capillary structure 2 by metal powder, and after heating and sintering, the metal powder is combined on the surface of the first capillary structure 2 to form an overlapping state. The particle diameter of the metal powder particles 31 is larger than the width of the groove 22 , so the metal powder particles 31 will not fall into the groove 22 . In this embodiment, the length of the second capillary structure 3 is not greater than half of the length of the groove 22 , as shown in FIG. 1 .

When the above-mentioned tube body 1 of the heat pipe is manufactured, after the working fluid is injected into the tube body, both ends of the tube body 1 are sealed to avoid leakage of the working fluid.

4 and 5 are respectively a schematic diagram of a bending section of a heat pipe with a double-layer capillary structure of the present invention and a side section of an internal working fluid flow. As shown in the figure: when the heat pipe is in use, the tube body 1 of the heat pipe will be bent according to the relationship of the installation position of the heat dissipation, so that the tube body 1 is bent into a polymorphic body, such as an L-shaped body; and one end of the tube body 1 Set as the cooling end 11, and the other end as the heated end 12. The heated end 12 has a first capillary structure 2 and a second capillary structure 3 inside, and the two overlap.

When the heated end 12 is attached to the surface of the electronic component (not shown in the figure) or the heat conduction block (not shown in the figure), the working fluid condensed by the first capillary tissue 2 and the second capillary tissue 3 inside the heated end 12 absorbs heat , to vaporize the working fluid, so that the air pressure at the heated end 12 gradually increases, so that the evaporated water vapor 4 will flow to the cold end 11 with low pressure, thereby forming a steam flow. After the water vapor 4 releases heat at the cooling end 11 , it condenses again into a liquid 5 , and quickly returns to the heated end 12 from the first capillary tissue 2 .

Since the first capillary tissue 2 and the second capillary tissue 3 are overlapped inside the heated end 12, the returning liquid 5 can condense in the slits 32 of the entire second capillary tissue 3, thereby increasing the heat absorption area of the heated end 12, And increase the speed of heat absorption.

The above-mentioned embodiments are only used to illustrate the utility model, but not to limit the utility model. Various equivalent structural changes made by those skilled in the art without departing from the spirit and scope of the present invention are within the scope of the present invention. The protection scope of the utility model is defined by the claims.

Claims (5)

1. the heat pipe structure with double-deck capillary structure is characterized in that, comprising:

Pipe shaft, described pipe shaft has colling end and heating end, and inwall is provided with first capillary structure;

Second capillary structure is located on the first capillary structure surface of described heating end inwall, and the length of described second capillary structure is not more than half of length of described first capillary structure.

2. the heat pipe structure with dual capillary structure as claimed in claim 1 is characterized in that, described body is circular hollow column.

3. the heat pipe structure with double-deck capillary structure as claimed in claim 1 is characterized in that, described first capillary structure is formed by a plurality of square strip shape body of being located on the described pipe shaft inwall, forms groove between per two described strip shape bodies.

4. the heat pipe structure with double-deck capillary structure as claimed in claim 1 is characterized in that, described second capillary structure is made of metal powder sintered particle.

5. the heat pipe structure with double-deck capillary structure as claimed in claim 4 is characterized in that the particle diameter of the particle of described metal dust is greater than the width of described groove.

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