Heat pipe with low heat loss

Abstract

The utility model relates to a heat pipe with low heat loss. The heat pipe comprises a pipe body made of a copper pipe, the pipe body comprises a hollow shell and a liquid absorbing core attached to the inner wall of the shell, the liquid absorbing core is made of a copper wire gauze, a flowing hole is formed in the axis of the liquid absorbing core, and a spiral groove is formed in the inner wall of the shell; a gap is formed between the surface, adjacent to the bottom surface of the spiral groove, of the copper wire gauze and the bottom surface of the spiral groove. When the deionized water flows in the gap, the side surface of the spiral groove is in contact with the deionized water, and the gravity of the deionized water is decomposed; therefore, a part of gravity is counteracted; therefore, the influence of the gravity of the deionized water on the backflow effect in the backflow process of the deionized water is reduced; the backflow effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pipes, in particular to a heat pipe with low heat loss. Background Art

[0002] Heat pipes have been widely used in electronic components with large heat generation due to their advantages of high heat transfer. When the heat pipe is working, the low-boiling-point working medium filled inside the pipe body absorbs the heat generated by the heat-generating electronic components in the evaporation section and then evaporates and vaporizes. The steam moves to the condensation section with the heat, and liquefies and condenses in the condensation section to release the heat, thereby dissipating the heat of the electronic components. The liquefied working medium flows back to the evaporation section under the action of the capillary structure of the inner wall of the heat pipe, continues to evaporate and vaporize, and liquefies and condenses, so that the working medium circulates inside the heat pipe and continuously dissipates the heat generated by the electronic components. During use, there are many angles for the placement of the heat pipe, that is, the position of the evaporation section and the condensation section. Since the liquid in the heat pipe needs to be dragged back from the condensation section to the evaporation section with the help of capillary force and gravity, when the condensation section is located directly above the evaporation section (that is, +90 degrees), this force is equal to the capillary force plus gravity, the reflux effect is the best, and the heat transfer effect of the heat pipe is also the best. When the condensation section is located directly below the evaporation section (-90 degrees), the reflux needs to overcome the influence of gravity, the reflux effect is the worst, and the heat transfer effect is naturally poor. Utility Model Content

[0003] The purpose of the utility model is to provide a heat pipe with low heat loss, so as to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a low heat loss heat pipe, including a tube body made of copper tube; the tube body includes a hollow shell and a liquid absorbent core attached to the inner wall of the shell, the liquid absorbent core is made of copper wire mesh, flow holes are arranged on the axis of the liquid absorbent core, and a spiral groove is arranged on the inner wall of the shell; a gap is arranged between the surface of the copper wire mesh adjacent to the bottom surface of the spiral groove and the bottom surface of the spiral groove.

[0005] Compared with the prior art, when deionized water flows in the gap, the side of the spiral groove contacts the deionized water, decomposing the gravity of the deionized water; thereby offsetting part of the gravity; thereby reducing the influence of the gravity of the deionized water itself on the reflux effect during the reflux process; and improving the reflux effect.

[0006] As a preferred technical solution of the present utility model, the vertical distance H of the gap is 100-400 μm.

[0007] As a preferred technical solution of the present utility model, the cross section of the spiral groove is an inverted trapezoid.

[0008] Compared with the prior art, the cross-sectional shape of the spiral groove is an inverted trapezoid. When the outer shell is bent, the cross-sectional shape of the spiral groove gradually becomes circular, with the least impact on the diameter of the spiral groove and the least impact on the capillary effect.

[0009] As a preferred technical solution of the present utility model, both ends of the tube body are formed with sealing parts to keep the inside of the tube body in a vacuum state, and an evaporation section and at least one condensation section are arranged between the two sealing parts.

[0010] As a preferred technical solution of the present utility model, the thickness of the liquid absorption core in the evaporation section is less than the thickness of the liquid absorption core in the condensation section.

[0011] As a preferred technical solution of the present utility model, at least one contact surface is arranged on the evaporation section.

[0012] As a preferred technical solution of the present utility model, three contact surfaces are arranged on the outer surface of the evaporation section, and the three contact surfaces are arranged in a "冂" shape or a triangle on the outer surface of the evaporation section.

[0013] As a preferred technical solution of the present utility model, four contact surfaces are arranged on the outer surface of the evaporation section, and the four contact surfaces are connected end to end to form a quadrilateral on the outer surface of the evaporation section.

[0014] In addition to the technical problems solved by the present invention, the technical features constituting the technical solution, and the advantages brought by these technical features of the technical solution described above, other technical problems that the present utility model can solve, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. Description of the Drawings

[0015] Figure 1 is the front view of the present utility model.

[0016] Figure 2 is the A-A cross-sectional view of the present utility model.

[0017] Figure 3 is the enlarged view at B of the present utility model.

[0018] Explanation of the reference numerals in the drawings: 01. Outer shell, 02. Liquid absorption core, 03. Flow hole, 04. Tube body, 05. Sealing part, 06. Evaporation section, 07. Condensation section, 08. Contact surface, 09. Spiral groove, 10. Gap. Detailed Description of the Embodiment

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0020] As shown in Figure 1-3As shown, a heat pipe with low heat loss of the utility model has a tube body 04 made of copper tube. The tube body 04 includes a hollow shell 01 and a liquid wick 02 attached to the inner wall of the shell 01. The liquid wick 02 is made of copper wire mesh. A flow hole 03 is arranged on the axis of the liquid wick 02. The liquid wick 02 is injected with a working medium, which is deionized water. When one end of the tube body 04 is heated (evaporation section 06), the liquid working medium in the liquid wick 02 will be vaporized into steam, and the steam will flow to the other end under the pressure difference inside the tube body 04. The steam flows in the flow hole 03. At the other end (condensation section 07), the steam is liquefied after being cooled, releasing latent heat and re-condensing into a liquid working medium, and then flows back to the evaporation end through the liquid wick 02 structure.

[0021] The two ends of the tube body 04 are crimped to form sealing parts 05, and an evaporation section 06 and at least one condensation section 07 are provided between the two sealing parts 05. The tube body 04 is sealed by the two sealing parts 05 so that the interior of the tube body 04 is in a vacuum state.

[0022] When a condensation section 07 is provided between two sealing parts 05, one of the sealing parts 05 is connected to the end of the evaporation section 06. When the other sealing part 05 is connected to the end of the evaporation section 06. At the same time, the evaporation section 06 and the condensation section 07 are fixedly connected. The evaporation section 06 is in contact with the heat source (photovoltaic inverter, computer CPU radiator, GPU radiator, graphics card radiator, server radiator, stage lamp, mining lamp, car lamp, etc.), and heat is transferred through the condensation end. And heat is dissipated through the ridges on the condensation section 07.

[0023] When two condensation sections 07 are arranged between the two sealing parts 05, the two condensation sections 07 are respectively fixedly connected to the two ends of the evaporation section 06. The two sealing parts 05 are respectively fixedly connected to the two condensation sections 07. Therefore, during use, the heat on the evaporation section 06 is conducted through the condensation sections 07 at both ends, accelerating the heat conduction efficiency of the evaporation section 06.

[0024] At least one contact surface 08 that abuts against the heat source is provided on the evaporation section 06, and the contact surface 08 is extruded by stamping when being processed. During use, multiple tube bodies 04 are fixed on the base in a row, and the contact surfaces 08 of the multiple tube bodies 04 are on the same horizontal plane and abut against the heat source. The contact surface 08 area with the heat source is increased by the design of the contact surface 08. The heat generated by the heat source can be quickly transferred to the tube body 04 and transmitted through the tube body 04. A number of ridges are provided on the condensation end. The heat on the tube body 04 is transferred to the surface of the ridge through the ridge, and then the heat on the ridge is taken away by the action of an external fan.

[0025] Since the contact surface 08 is provided on the evaporation section 06, the pore diameter of the evaporation section 06 is smaller than that of the condensation section 07, so as to ensure that the diameter of the tube hole provided along the axis of the wick 02 is the same. As a result, the thickness of the wick 02 within the evaporation section 06 is smaller than that of the wick 02 within the condensation section 07. When the steam is liquefied after being cooled in the condensation section 07, the latent heat is released and it is re-condensed into the liquid working medium, and then it flows back to the evaporation section 06 through the wick 02 structure. It is equivalent to the liquid flowing from a large diameter to a small diameter, generating a certain pressure to accelerate the capillary flow rate of the liquid working medium.

[0026] Three contact surfaces 08 are provided on the outer surface of the evaporation section 06, and the three contact surfaces 08 are arranged in a "冂" shape or a triangle on the outer surface of the evaporation section 06.

[0027] At the same time, four contact surfaces 08 can also be provided on the outer surface of the evaporation section 06, and the four contact surfaces 08 are connected end to end and arranged in a "口" shape (quadrilateral) on the outer surface of the evaporation section 06.

[0028] The condensation section 07 includes an installation section for installing the ridge fins and an arc-shaped transition section located between the installation section and the evaporation section 06. Since the arc-shaped transition section will reduce the heat conduction performance of the tube body 04, the bending radius of the transition section is greater than or equal to three times the diameter of the condensation end, ensuring a smooth transition between the installation section and the evaporation section 06, and making the change amount of the maximum heat transfer power of the tube body 04 smaller.

[0029] The inner wall of the shell 01 is provided with a spiral groove 09. The cross section of the spiral groove 09 is an inverted trapezoid. The spiral groove 09 can be formed in the tube drawing stage of producing the copper tube. It can also be formed by processing the copper tube later. The copper wire mesh and the inner wall of the shell 01 are fixed to the inner wall of the shell 01 by diffusion welding. A gap 10 is provided between the surface of the copper wire mesh adjacent to the bottom surface of the spiral groove 09 and the bottom surface of the spiral groove 09, and the vertical distance H of the gap 10 is 100-400μm. Since the monodisperse in deionized water, the diameter range is between 20nm-1000μm, and the capillary pore size of the sintered liquid absorbent core 02 is usually between 3-400μm. Therefore, the vertical distance H of the gap 10 is designed to be 100-400μm, so that the deionized water can pass through the gap 10 smoothly. At the same time, through the setting of the spiral groove 09, when the deionized water flows in the gap, the side of the spiral groove 09 contacts the deionized water, and the gravity of the deionized water is decomposed. Thus, a part of the gravity is offset. Thus, the influence of the gravity of the deionized water itself on the reflux effect during the reflux process of the deionized water is reduced. The reflux effect is improved, and the heat transfer effect of the tube body 04 is improved at the same time. At the same time, the cross-sectional shape of the spiral groove 09 is an inverted trapezoid. When the shell 01 is bent, the cross-sectional shape of the spiral groove 09 gradually becomes circular. Therefore, when the shell 01 is bent, the impression on the diameter of the spiral groove 09 is the smallest, and the impression on the capillary effect is the smallest. At the same time, a copper wire mesh is attached to the inside of the shell 01. Through the copper wire mesh setting. The capillary effect of the copper wire mesh can make up for the weakening of the capillary phenomenon caused by the bending deformation of the spiral groove 09. Therefore, the heat conduction effect of the heat conduction bending part is similar to the heat conduction effect of the horizontal section of the tube body 04.

[0030] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A heat pipe with low heat loss, comprising a pipe body made of a copper pipe; characterized in that: The tube body includes a hollow outer shell and a liquid absorption core attached to the inner wall of the outer shell. The liquid absorption core is made of copper wire mesh, a flow hole is provided on the axis of the liquid absorption core, and a spiral groove is provided on the inner wall of the outer shell; there is a gap between the surface of the copper wire mesh adjacent to the bottom surface of the spiral groove and the bottom surface of the spiral groove.

2. The heat pipe with low heat loss according to claim 1, characterized in that: The vertical distance H of the gap is 100 - 400 μm.

3. The heat pipe with low heat loss according to claim 1, characterized in that: The cross-section of the spiral groove is an inverted trapezoid.

4. The heat pipe with low heat loss according to any one of claims 1 to 3, characterized in that: Both ends of the tube body are formed with sealing parts to make the inside of the tube body in a vacuum state, and an evaporation section and at least one condensation section are provided between the two sealing parts.

5. The heat pipe with low heat loss according to claim 4, characterized in that: The thickness of the liquid absorption core in the evaporation section is less than the thickness of the liquid absorption core in the condensation section.

6. The heat pipe with low heat loss according to claim 5, characterized in that: At least one contact surface is provided on the evaporation section.

7. The heat pipe with low heat loss according to claim 6, characterized in that: Three contact surfaces are provided on the outer surface of the evaporation section, and the three contact surfaces are arranged in a "冂" shape or a triangle on the outer surface of the evaporation section.

8. The heat pipe with low heat loss according to claim 5, characterized in that: Four contact surfaces are provided on the outer surface of the evaporation section, and the four contact surfaces are connected end to end to form a quadrilateral on the outer surface of the evaporation section.

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