TWM616502U - Heat pipe structure - Google Patents

Abstract

A heat pipe structure comprising: a pipe body having a first end, a second end and an airtight cavity The wall surface of the tube body has at least one capillary structure layer and the tube body is filled with a working fluid. Any one of the first and second ends of the tube body is arranged perpendicular to a horizontal plane. They are respectively located at the upper and lower ends of the tube body, and the lower end of the tube body in contact with the horizontal surface has an expansion space as a release space for ice molecules after the working fluid freezes.

Description

Heat pipe structure

A heat pipe structure, especially a heat pipe structure with space for releasing force of ice molecules that freezes.

The traditional heat pipe system has a hollow shell (tube) body, and a capillary wick, working fluid (water, refrigerant, methanol, acetone, liquid ammonia, etc.) are arranged inside the shell (tube) body. The hollow shell (tube) At present, most of the materials on the market are made of copper, aluminum, etc., because the internal working fluid of the hollow shell (tube) body undergoes a phase change latent heat mechanism for heat conduction.

However, the current applications in the field of electronic product heat dissipation are heat pipes made of copper material and water (Copper tube+Pure Water). Because copper has better thermal conductivity, the working fluid has better latent heat, which can meet most of the requirements. Used in a normal environment; but it will still suffer from application conditions, such as outdoor (5G, 6G base stations, outdoor photovoltaic power IGBT cooling, automotive or any outdoor application that requires heat dissipation), when the working fluid is at an ambient temperature of 0 degrees The resulting icing problem and the influence of icing molecular force on the structural strength are restricted by conditions.

When the heat pipe is installed horizontally, when the working fluid encounters icing, the ice molecules swell and squeeze the heat pipe wall to expand, causing the heat pipe to deform. On the other hand, if the heat pipe is installed in an upright manner, the working fluid will be affected by gravity. When the working environment is lower than 0 degrees, the working fluid inside the heat pipe will freeze, and the ice molecules will expand to expand the wall of the heat pipe. In severe cases, the heat pipe will burst, causing the heat pipe to rupture. Loss of vacuum and leakage of working fluid.

Therefore, how to provide proper protection of the internal working fluid from icing at low temperature, and then destroy the internal vapor-liquid circulation of the heat pipe, is the most important goal for those who are familiar with the art.

Therefore, in order to effectively solve the above-mentioned problems, the main purpose of this creation is to provide a solution to solve the problem that the working liquid filled in the heat pipe will freeze at zero when the heat pipe is vertically arranged. The release force will expand the bottom of the tube body, thereby adding a heat pipe structure with a space for releasing force of ice molecules.

In order to achieve the above purpose, this creation provides a heat pipe structure, which includes: a tube body; the tube body has a first end, a second end and an airtight chamber, and the wall surface of the tube body has at least one capillary structure Layer and filled with a working fluid. Either one of the first and second ends of the pipe body is arranged perpendicular to a horizontal plane. The first and second ends are respectively located at the upper and lower ends of the pipe body. The lower end in contact with the horizontal plane has an expansion space as a release space for ice molecules after the working fluid freezes.

When the heat pipe is placed vertically, the working fluid affected by gravity will gather at the lower end of the heat pipe, and because the working fluid filled in the heat pipe will freeze when the working environment is below zero, and in the actual working environment The temperature varies from -40 to 100 degrees. When the internal working fluid freezes due to the different physical density of the ice water, the molecular release force of the ice at the lower end of the most vertical direction (the lower end of the heat pipe) will make the bottom of the heat pipe bulge. Therefore, in this creation, an expansion space that prevents the heat pipe body from swelling is used as the release space for ice molecules after the working fluid freezes.

1: Tube body

11: first end

12: second end

13: Airtight chamber

14: Expansion space

2: Capillary structure layer

3: working fluid

Figure 1 is a perspective view of the first embodiment of the heat pipe structure created; Figure 2 is a cross-sectional view of the first embodiment of the heat pipe structure created.

The above-mentioned purpose of this creation and its structural and functional characteristics will be described based on the preferred embodiments of the accompanying drawings.

Please refer to Figures 1 and 2, which are the three-dimensional and cross-sectional views of the first embodiment of the heat pipe structure of this creation. As shown in the figure, the heat pipe structure of this creation includes: a tube body 1; the tube body 1 has a first End 11 and a second end 12 and an airtight chamber 13, the wall surface of the tube body 1 has at least one capillary structure layer 2 and is filled with a working fluid 3, the working fluid 3 is water, refrigerant, methanol, acetone. In any case, the capillary structure layer 2 can be sintered powder or grooves or woven mesh or a combination thereof, and the tube body 1 is any one of a round tube, a flat tube, or a square tube. The material of the tube body 1 It is any one of aluminum, copper, stainless steel, or titanium. Either one of the first and second ends 11, 12 of the tube body 1 is arranged perpendicular to a horizontal plane, which means that the tube body 1 is in an upright manner. The first and second ends 11, 12 are respectively located at the upper and lower ends of the tube body 1, and one end of the tube body 1 in contact with the horizontal plane has an expansion space 14 as the ice molecules of the working fluid 3 after freezing Free up space.

The volume ratio of the part where the tube body 1 is provided with the expansion space 14 is greater than that of other parts of the tube body 1. The tube wall protrudes horizontally to either the left or right sides to form a space for tube expansion.

The problem solved by this creation is that when the heat pipe is used upright, the working fluid will gather at the lower end. At the same time, when the ambient temperature is lower than 0 degrees, the working fluid at the lower end of the heat pipe will freeze and cause the heat pipe to freeze. The phenomenon of expansion of the ice part, even bursting of the tube, so in this case, when the heat pipe is used upright, an expansion space is set at the lower end of the heat pipe as a release space for the ice molecules after the working fluid freezes. Of course, it can also be located at both ends of the heat pipe. The expansion space is arranged continuously, or the expansion space is correspondingly arranged in various parts of the heat pipe according to different usage conditions.

1: Tube body

11: first end

12: second end

13: Airtight chamber

14: Expansion space

2: Capillary structure layer

3: working fluid

Claims (6)

A heat pipe structure includes: a pipe body having a first end and a second end and an airtight chamber; the wall surface of the pipe body has at least one capillary structure layer and is filled with a working fluid; Either one of the first and second ends is arranged perpendicular to a horizontal plane, the first and second ends are respectively located at the upper and lower ends of the tube body, and one end of the tube body in contact with the horizontal plane has an expansion space as a working fluid The ice molecules after freezing free up space. As for the heat pipe structure described in item 1 of the scope of patent application, the place where the pipe body has the expansion space is the lower end, and the volume ratio of the pipe body is greater than other parts of the pipe body. According to the heat pipe structure described in item 1 of the scope of patent application, the expansion space is vertically protruded from the pipe wall of the pipe body to form a pipe expansion space. As for the heat pipe structure described in item 1 of the scope of patent application, the expansion space is horizontally protruded from either side of the tube wall to the left or right to form an expansion space. In the heat pipe structure described in item 1 of the scope of patent application, the material of the pipe body is any one of aluminum, copper, stainless steel, and titanium. In the heat pipe structure described in item 1 of the scope of patent application, the workflow system is any one of water, refrigerant, methanol, and acetone.

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