TWM615244U - Heat pipe structure - Google Patents

Abstract

A heat pipe structure comprising: a tube body, a plurality of capillary structures, and a working fluid; the tube The body has an airtight chamber; the capillary structures are composed of the groove, the mesh body, and the sintered powder layered from the outside to the inside. The grooves have an open side and a closed side, and the width of the open side is smaller than the closed side. The width of the side; the working fluid is filled in the airtight chamber of the tube, and diffused and recirculated by the aforementioned capillary structure. Through the creation of the heat pipe structure, the phase change can occur in the tube at an ambient temperature of 0~-90 degrees Low temperature start-up phase change of latent heat heat exchange.

Description

Heat pipe structure

A heat pipe structure, especially a low-temperature start-up phase-change latent heat heat pipe structure that can undergo phase-change latent heat exchange in the tube body at an ambient temperature of 0 to -90 degrees.

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 (opper 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 still suffers from application conditions, such as outdoor (5G, 6G base stations, outdoor photovoltaic power IGBT heat dissipation, automotive or any indoor or outdoor applications that require heat dissipation), the working fluid is at ambient temperature 0 Conditions such as the icing problem caused by the temperature and the influence of icing molecular force on the structural strength.

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 kind of latent heat heat pipe structure that can undergo phase change latent heat exchange at an ambient temperature of 0 to -90 degrees Celsius.

In order to achieve the above purpose, this creation provides a heat pipe structure, which includes: a tube body, a plurality of capillary structures, and a working fluid; the tube body has an airtight chamber; the capillary structures are formed by the grooves and the grid , The sintered powder is composed of layers from outside to inside. The grooves have an open side and a closed side. The width of the open side is smaller than the width of the closed side; the working fluid is filled in the airtight chamber of the tube, and Diffusion and reflow are carried out through the capillary structures. The mesh body is arranged to further separate the sintered powder body from the groove, preventing the powder of the sintered powder body from falling into the groove and blocking the groove , Which further affects the diffusion path of the working fluid in the vapor state in the groove. Through the heat pipe structure of this creation, the ambient temperature can be 0~-90 degrees, and the low temperature start phase change of the latent heat exchange can still occur in the pipe body. .

11: Tube body

111: airtight chamber

12: Plural capillary structure

121: groove

1211: open side

1212: closed side

122: Mesh

1221: Peripheral surface

1222: inner surface

123: Sintered powder

2: The working fluid

3: Powder sintered body

Figure 1 is a three-dimensional exploded view of the first embodiment of the heat pipe structure created; Figure 2 is a combined 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 exploded and combined 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 11, a plurality of capillary structures 12, and a work Fluid 2; The tube body 11 has an airtight chamber 111, and the tube body 11 is made of aluminum (the aluminum material is made of aluminum, but not limited to models A3003 and Al6063. The tube body 11 has a wall thickness of about Is 0.5mm, the depth of the groove 112 is 0.3mm, the width is 0.3mm), copper, stainless steel, titanium, and the tube body 11 is any one of a round tube, a flat tube, or a square tube, wherein the tube body has An evaporation area (which can be set at one end or the middle section of the tube) and a heat dissipation area (which can be set at one end of the tube).

The capillary structures 12 are composed of a groove 121, a mesh body 122, and a sintered powder 123 layered from the outside to the inside. The grooves 121 are arranged in an annular array on the wall of the pipe body 11, and the The groove 121 has an open side 1211 and a closed side 1212. The width of the open side 1211 is smaller than the width of the closed side 1212. The cross-sectional shape of the groove 121 is an inverted trapezoid or ohmic or triangular shape. The outer surface of 122 is joined to the inner wall surface of the tube body 11 through sintering or diffusion bonding, and the material of the mesh body 122 is any of copper, aluminum, stainless steel, and titanium. Al6063 is taken as an example, but it is not meant to be a limitation. The mesh number is preferably 200#, but it is not meant to be a limitation.

The working fluid 2 is filled in the airtight chamber 111 of the tube body 11. When the working fluid 2 is working, the liquid working fluid is evaporated and converted into a vapor state working fluid by the evaporation area, and the working fluid is stored in the airtight chamber 111 and Or diffuse in the groove or flow to the heat dissipation area for heat dissipation and cooling. When the vapor working fluid is condensed, it will be condensed and converted into a liquid working fluid. After being converted into a liquid working fluid, it will pass through the grid 122 and the sintered powder 123 and or the groove 121 The capillary phenomenon is generated to guide the liquid working fluid back to the evaporation area (the part in contact with the heat source) of the tube body 11, and the groove 121 can allow the aforementioned condensed liquid working fluid to flow back or the evaporated vapor working fluid to diffuse.

The mesh body 122 is mainly used to separate the sintered powder 123 from the groove 121 to prevent the powder of the sintered powder 123 from falling into the groove 121 and block the groove 121, thereby affecting the operation of the liquid state. The path for the fluid 22 to diffuse in the groove 121, so that the low-temperature start-up phase change of the latent heat exchange can still occur in the pipe body 11 at an ambient temperature of 0 to -90 degrees.

The mesh body 122 has a peripheral surface 1221 and an inner peripheral surface 1222. The peripheral surface 1221 is attached to the open side 1211 of the groove 121 correspondingly. The inner peripheral surface 122 is provided with a powder sintered body 3. The sintered powder body 3 is a structure sintered by any one of copper powder, aluminum powder, and nickel powder.

The working fluid 2 is filled in the airtight chamber 111 of the tube body 11.

This creation provides a multi-scale capillary wick low-temperature heat pipe. The tube body 11 uses an example to illustrate that it mainly adopts aluminum material and sets "Ω"-shaped grooves on the inner wall of the tube body 11 and adds an aluminum grid. And sintered powder body, and finally vacuumized and filled with working liquid (refrigerant (liquid point -90 degrees), so that the working temperature range is -90 degrees to 100 degrees, for outdoor scenes (such as 5G, 6G base station chip Heat dissipation, photovoltaic power IBGT heat dissipation, vehicle chip heat dissipation), the tube body can undergo phase change latent heat heat exchange at ambient temperature of 0 to -90 degrees, and the low temperature start phase change latent heat heat pipe, that is, the low temperature heat pipe structure. When the heat pipe is used in a low temperature environment, the internal The working fluid does not produce icing and keeps the vapor-liquid circulation inside the heat pipe in normal operation.

11: Tube body

111: airtight chamber

12: Plural capillary structure

121: groove

1211: open side

1212: closed side

122: Mesh

123: Sintered powder

2: working fluid

3: Powder sintered body

Claims (5)

A heat pipe structure includes: a tube body with an airtight chamber; a plurality of capillary structures, the capillary structures are composed of a groove, a mesh body, and a sintered powder layered from the outside to the inside, the grooves It has an open side and a closed side, the width of the open side is smaller than the width of the closed side, and is arranged in the airtight chamber; a working fluid is filled in the airtight chamber of the tube body and performed through the capillary structure Diffusion and backflow. According to the heat pipe structure described in item 1 of the scope of patent application, the cross-sectional shape of the groove is an inverted trapezoid or ohmic or triangular shape. According to the heat pipe structure described in item 1 of the scope of patent application, the sintered powder is a structure sintered by any of copper powder, aluminum powder, and nickel powder. In the heat pipe structure described in item 1 of the scope of patent application, the material of the mesh body is any one of copper, aluminum, stainless steel, and titanium. As for 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.

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