Multi-channel reinforced radiating tube

Abstract

According to the multi-channel reinforced radiating pipe, the section of the radiating pipe is provided with only one butt joint seam, a plurality of inner bends are arranged in the radiating pipe and form a plurality of channels, the pressure bearing capacity is enhanced, the internal resistance is changed, efficient heat conduction is achieved, the inner bends at the two ends of the section of the radiating pipe are attached to the two ends of the pipe wall, and the strength of the windward side face is higher; the inner bends are attached and welded to the inner wall of the pipe wall, the overall thickness is increased, after the inner bends are matched with the main piece, the pressure borne by the two ends of the section is increased, overall deformation is not prone to occurring, and the compression strength and the heat dissipation effect are improved. Only one butt joint seam is welded at the outer edge of the radiating pipe, so that welding spots are few, the one-time welding qualification rate is high, materials are not folded and extruded, the leakage probability is reduced, and vibration failure is not prone to being caused.

Description

Technical Field

[0001] This invention relates to the field of heat pipes, and in particular to a multi-channel reinforced heat pipe. Background Technology

[0002] With the development of technology, in manufacturing industries such as automobile manufacturing, non-road machinery, new energy, power batteries, energy storage power generation, and big data centers, power or control systems must maintain stable and reliable performance and service life, and continue to operate normally. This places increasingly higher demands on their heat transfer systems, including heat dissipation, heat exchange, and refrigeration, requiring higher heat dissipation efficiency and pressure resistance from radiators. As crucial heat-conducting components in heat transfer systems such as radiators, heat exchangers, air conditioning condensers, and evaporators, heat pipes face significant challenges in terms of pressure resistance and heat exchange efficiency.

[0003] Traditional and existing heat pipes have the following drawbacks: ① Some heat dissipation pipe channels have thinner ends (e.g.) Figure 11 As shown in the figure, the strength is not high. After the heat pipe is brazed with the main plate, it is subjected to a large pressure and is very easy to deform or even crack and leak, resulting in reduced heat dissipation and heat conduction efficiency. In severe cases, the entire heat dissipation system may even fail.

[0004] ② Some heat dissipation pipes undergo repeated folding and compression of the material to form internal partitions in order to increase strength. However, excessive compression after folding causes the material itself to generate stress that is difficult to release, or the material to crack. Furthermore, each fold has a butt joint (e.g., Figure 12 As shown in the figure, there is a high risk of incomplete soldering during the brazing process.

[0005] ③ Some heat pipes are lap-type heat pipes (e.g.) Figure 13 As shown, the heat pipe is made up of two heat pipe fins overlapping each other. The channel cross-section is formed by the material overlapping at both ends. The middle of the outer edge of the heat pipe is formed by multiple bending and extrusion of the material to form an internal partition. Then it is assembled and brazed. There are many gaps between the joints, and the surface at the overlapping ends is not complete. It is easy to produce false welds in the overlapping gaps, which can cause leakage and vibration failure. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a multi-channel reinforced heat dissipation pipe, the technical solution of which is as follows: The heat pipe consists of section I and section II, and there is only one joint between section I and section II; In section I, section I consists of an inner bend and a pipe wall. The inner bend includes inner bend I and at least one inner bend II. Inner bend I is tightly fitted to the pipe wall, and the tail of inner bend I is connected to the end of inner bend II. Several inner bends II are connected end to end, and the rear end face of the corner of each inner bend II is fitted to the pipe wall. The tail of the end inner bend II is connected to the end of the left bend, and the tail of the left bend is connected to the end of the pipe wall. In section II, the end of the pipe wall is connected to the end of the right bend, the tail of the right bend is connected to the end of the inner bend II at the beginning of section II, and several inner bends II in section II are connected end to end, and the front face of the corner of each inner bend II is in contact with the pipe wall; the tail of the end inner bend II is connected to the end of inner bend I, and inner bend I is in close contact with the pipe wall.

[0007] Furthermore, the heat dissipation pipe is integrally formed, with its entire structure beginning at the inner bend I of section I and ending at the inner bend I of section II.

[0008] Furthermore, the inner bend I can be arc-shaped, square, with an inner fold, or polygonal.

[0009] Furthermore, the shape of the joint between the pipe wall and the inner bend I is the same.

[0010] Furthermore, each inner bend II consists of crests and troughs, with the crests and troughs closely fitted to the adjacent pipe wall, and the contact surfaces being point contact or surface contact.

[0011] Furthermore, the connecting surface between the crest and trough of the inner bend II can be a smooth surface, a perforated surface, a corrugated surface, or a windowed surface.

[0012] Furthermore, the heat dissipation pipe section I and section II have the same forming structure, and their shapes can be symmetrical or asymmetrical.

[0013] Furthermore, the joint is a bend I, which consists of a left bend and a right bend, with the wide surface of the left bend closely fitting the wide surface of the right bend.

[0014] Furthermore, the bonding connection method involves the materials being tightly bonded together, forming a closed state after brazing.

[0015] Furthermore, the heat sink is manufactured by flattening, bending, folding, and repeating bending and folding several times from a roll of metal material of a certain width. The heat sink forming process includes the following steps: S1: Includes three sides: the first side, the second side, and the third side, which are formed by bending and connected to each other as one unit. The first side and the second side are bent to the left, and the second side and the third side are bent to the right. The first side and the third side are on the same horizontal line. S2: Continue bending on the first and third sides to form an inner bend II on the first and third sides; S3: Repeat step S2 several times to form several inner bends II; S4: The ends of the first and third sides are rolled into an inner bend I; S5: Using the left bend and right bend as edges, fold the first and third edges after bending back towards the second edge for the first time; S6: After S5 is folded back, the left side is folded back a second time with the length of inner bend I, inner bend II and left bend, and the right side is folded back a second time with the length of inner bend I, inner bend II and right bend, so that the left bend and right bend fit together to form a heat dissipation pipe; S7: After the heat dissipation tube is formed, cut it to the required length.

[0016] The beneficial effects of this invention are as follows: This invention is a multi-channel reinforced heat dissipation pipe. The heat dissipation pipe has only one butt joint in its cross-section. The inside of the heat dissipation pipe has several internal bends, which form multiple channels, enhancing pressure resistance, changing internal resistance, and improving efficient heat conduction. The internal bends at both ends of the heat dissipation pipe cross-section are fitted to the two ends of the pipe wall, increasing the strength of the windward side. All internal bends are welded to the inner wall of the pipe, increasing the overall thickness. After being fitted with the main plate, the pressure on both ends of the cross-section increases, making the whole structure less prone to deformation, thus improving pressure resistance and heat dissipation effect. Only one butt joint is welded at the outer edge of the heat dissipation pipe, resulting in fewer weld points, a high first-time welding success rate, and the material is not subjected to folding and compression, reducing the probability of leakage and minimizing vibration failure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this patent; Figure 2 This is an enlarged view of interval I; Figure 3 This is an enlarged view of interval II; Figure 4 Enlarged view of bend I; Figure 5 This is a schematic diagram of the bend at the beginning and end of section I after the division in Example 1; Figure 6 This is a schematic diagram of the bend at the beginning and end of section II after the division in Example 1; Figure 7 This is a schematic diagram of the multi-fold composite single-seam butt joint structure of Embodiment 2 of this patent; Figure 8 Schematic diagram A of the multi-fold composite point contact structure in Example 2; Figure 9 This is a schematic diagram (B) of the multi-fold composite point contact structure in Example 2; Figure 10 This is a schematic diagram of the multi-layered folded edge structure of the inner bend I in Example 3; Figure 11 This is a schematic diagram of a single-layer, single-seam butt joint structure in the prior art; Figure 12 This is a schematic diagram of a single-layer multi-seam butt joint structure in the prior art; Figure 13 This is a schematic diagram of a single-layer, multi-slit, double-piece overlapping structure in the prior art; Figure 14 Taking a tube with a cross-sectional length of 32 as an example, a comparison of the pressure-bearing strength of heat dissipation tubes with different structures is shown in the figure. Figure 15 for Figure 14 Bar chart of first-time weld success rate (%); Figure 16 for Figure 14 Bar chart of sample burst pressure (MPa); Figure 17 This is a schematic diagram of the molding process structure of the present invention; As shown in the figure, 1 is the heat dissipation pipe, 2 is the bend I, 3 is the inner bend I, 4 is the inner bend II, 5 is the inner bend III, 6 is the left bend, 7 is the upper pipe wall, 8 is the lower pipe wall, 9 is the right bend, and 10 is the arc surface of the pipe wall. Detailed Implementation

[0018] As shown in the figure, the present invention is a multi-channel reinforced heat dissipation pipe. The heat dissipation pipe 1 is made of a single piece of material and is formed by multiple bending. It includes section I and section II. There is only one butt joint between section I and section II, namely the bending part I2.

[0019] The forming structure of interval I and interval II is the same, and the shape can be symmetrical or asymmetrical. The following examples use the symmetrical form as an example. Example 1

[0020] This embodiment takes the contact between the inner bend and the pipe wall as an example.

[0021] 1. In interval I, such as Figure 1 , Figure 2 and Figure 5 As shown:

[0022] Section I consists of an inner bend and a pipe wall. The inner bend is composed of inner bend I3 and multiple inner bends II (in this embodiment, inner bend II is composed of inner bend II4 and inner bend III5). Multiple inner bends form multiple channels for efficient heat conduction. The pipe wall includes an upper pipe wall 7, a pipe wall arc surface 10, and a lower pipe wall 8.

[0023] The inner bend I3 is arc-shaped, with its upper surface at the beginning fitting against the inner wall of the upper pipe wall, the arc surface of the inner bend I3 fitting against the arc surface 10 of the pipe wall, and the lower surface of the tail of the inner bend I3 fitting against the lower pipe wall 8.

[0024] After the tail of the inner bend I3 is connected to the head of the inner bend II4, it bends upward, and the upper plane of the tail of the inner bend II4 is in contact with the inner wall of the upper pipe 7.

[0025] The tail of inner bend II4 connects to the head of inner bend III5 and then bends downward. The lower plane of the tail of inner bend III5 fits against the inner wall of the lower pipe wall 8. The connecting surface between the crest and trough of inner bend II can be a smooth surface, a perforated surface, a corrugated surface, or a windowed surface, etc. The connecting surface is not limited to the above forms and can be of various forms.

[0026] The end of the inner bend III5 connects to the lower end of the left bend and then bends upwards. The end of the left bend 6 connects to the right side of the upper pipe wall.

[0027] 2. In interval II, such as Figure 1 , Figure 3 and Figure 6 As shown:

[0028] The lower pipe wall of section I extends to the lower pipe wall of section II and is integrally connected; The lower pipe wall, the arc surface of the pipe wall, and the upper pipe wall of section II are integrally connected. The end of the upper pipe wall is connected to the beginning of the right bend 9 and then bends downward. The tail of the right bend is connected to the beginning of the inner bend III5. The lower plane of the beginning of the inner bend III5 is in contact with the inner wall of the lower pipe wall 8. The tail of the inner bend III5 bends upward and connects with the beginning of the inner bend II4. The upper plane of the beginning of the inner bend is in contact with the inner wall of the upper pipe wall 7. The tail of the inner bend II4 bends downward and connects with the beginning of the inner bend I3. The lower plane of the beginning of the inner bend I3 is in contact with the lower pipe wall. The arc surface of the inner bend I3 is in contact with the arc surface of the pipe wall of section II. The upper plane of the end of the inner bend I3 is in contact with the inner wall of the upper pipe wall.

[0029] like Figure 4 As shown, the left and right bends are tightly fitted together to form a butt joint, i.e., the bend I2. In this embodiment, all mating surfaces are connected with zero gaps and are brazed to form a closed state. Example 2

[0030] like Figure 7 As shown in the diagram, this embodiment uses a multi-fold composite single-seam butt joint structure as an example. Compared with Embodiment 1, the first and last planes of the inner bend are both in contact with the pipe wall, and the left and right bends are the same as in Embodiment 1. The difference from Embodiment 1 is that the inner bends I3 at both ends of this embodiment have opposite shapes to those in Embodiment 1, and the number of inner bends II is increased.

[0031] exist Figure 7 In this process, depending on the situation, the internal bends and multiple folds can be combined and made into point contacts with the pipe wall, such as... Figure 8 and Figure 9 As shown. Inner bends II4 and III5... (multiple inner bends II can be added depending on the actual situation). The first or last end of each bend is in point contact with the inner wall of the pipe, with zero gap fitting, and a closed state is formed after brazing. Example 3

[0032] like Figure 10 As shown, with Figure 7 In contrast, the inner bend I3 has a multi-layered inner bend shape, and the shape of its pipe wall arc surface 10 is the same as that of the inner bend I3. Depending on the actual situation, the shape of the inner bend I3 can be changed to a square, arc, or polygon, and the shape of the inner bend II can be the same as... Figure 8 and Figure 9 They have the same shape.

[0033] Taking a tubular cross-section length of 32 as an example, this patent differs from existing technologies (such as...). Figures 11-13 Compared to (as shown), the pressure-bearing strength of heat pipes with different structures is compared, such as Figures 14-16 As shown, this invention significantly improves the first-time welding qualification rate compared to existing technologies for the same tube type, effectively improving product quality and reducing production costs. It also enhances the product's pressure resistance, with a burst pressure value far exceeding that of existing heat dissipation tubes. This provides better protection for the safety and stability of heat transfer systems such as heat dissipation, heat exchange, and refrigeration. Experimental results verify that its thermal conductivity is also significantly improved, allowing for a more compact design of the radiator and heat exchanger core, achieving material savings, cost reduction, and energy efficiency.

[0034] The molding process of this invention, such as Figure 17 As shown (in) Figure 7 (Taking molding as an example) This invention is made from a roll of metal material of a certain width through leveling, bending, folding, and several bending and folding processes. The metal material used is copper or aluminum with a diameter of 1.5m, a width of 108 mm, and a thickness of 0.24 mm. The heat sink forming process includes the following steps: S1: Includes three sides: the first side, the second side, and the third side, which are formed by bending and connected to each other as one unit. The first side and the second side are bent to the left, and the second side and the third side are bent to the right. The first side and the third side are on the same horizontal line. S2: Continue bending on the first and third sides to form an inner bend II on the first and third sides; S3: Repeat step S2 once to form two inner bends II (i.e., inner bend II4 and inner bend III5). S4: The ends of the first and third sides are rolled into an inward bend I3; S5: Using the left bend and right bend as edges, fold the first and third edges after bending back towards the second edge for the first time; S6: After S5 is folded back, the left side is folded back for the second time with the length of inner bend I, inner bend II, inner bend III and left bend, and the right side is folded back with the length of inner bend I, inner bend II, inner bend III and right bend, so that the left bend and right bend fit together to form a heat dissipation pipe. S7: After the heat dissipation tube is formed, it is cut to the required length and assembled with other matching heat dissipation components and brazed as a whole. After brazing, the heat dissipation tube is integrated and sealed at the joint of inner bend I, inner bend II and the second side, thus realizing the function of the heat dissipation tube.

[0035] This heat dissipation pipe production equipment has several sets of quick-change mold frames. Each quick-change mold frame has a pair of roller combinations, which are suitable for changing tubes of different specifications and different inner cavity folds. The heat dissipation pipe is made of fixed-length rolled plate material. One end of the equipment is a material inlet guide device. Through leveling, rolling, folding, secondary rolling, and secondary folding (the number of rolling and folding corresponds to the number of inner bends II4 and III5), after several steps of rolling and folding, the inner bends I3 are rolled at both ends, and then gradually folded back to form the pipe wall arc surface 10. The folding continues to gradually make the inner bends I3 at both ends contact and fit with the pipe wall arc surface. The top and bottom surfaces of the intersection of inner bends II4 and III5 fit with the pipe wall 7 and pipe wall 8 respectively. The left bend 6 and right bend 9 are butted and fitted together to form the shaped heat dissipation pipe. The equipment automatically cuts it to the required length and then assembles it with other matching heat dissipation components and brazes it to form an integral and sealed state, realizing the function of the heat dissipation pipe.

[0036] This invention relates to a multi-channel reinforced heat dissipation pipe. The heat dissipation pipe has one and only one butt joint. Inside, there are several internal bends, forming multiple channels for efficient heat conduction. The internal bends at both ends of the heat dissipation pipe's cross-section are closely fitted to the pipe wall, increasing the strength of the windward side. All internal bends are welded to the inner wall of the pipe, enhancing the overall thickness. After brazing with the main plate, the pressure resistance at both ends increases, making the overall structure less prone to deformation and improving pressure resistance and heat dissipation. Only one butt joint is welded at the outer edge of the heat dissipation pipe, resulting in fewer weld points, a high first-time welding success rate, reduced leakage probability, and less susceptibility to vibration-induced failure.

[0037] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A multi-channel reinforced heat dissipation pipe, characterized in that, The heat pipe consists of section I and section II, and there is only one joint between section I and section II; In section I, section I consists of an inner bend and a pipe wall. The inner bend includes inner bend I and at least one inner bend II. Inner bend I is tightly fitted to the pipe wall, and the tail of inner bend I is connected to the end of inner bend II. Several inner bends II are connected end to end, and the rear end face of the corner of each inner bend II is fitted to the pipe wall. The tail of the end inner bend II is connected to the end of the left bend, and the tail of the left bend is connected to the end of the pipe wall. In section II, the end of the pipe wall is connected to the end of the right bend, the tail of the right bend is connected to the end of the inner bend II at the beginning of section II, and several inner bends II in section II are connected end to end, and the front face of the corner of each inner bend II is in contact with the pipe wall; the tail of the end inner bend II is connected to the end of inner bend I, and inner bend I is in close contact with the pipe wall.

2. The multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The heat pipe is integrally formed, and its entire structure begins at the inner bend I of section I and ends at the inner bend I of section II.

3. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The inner bend I can be arc-shaped, square, with an inner fold, or polygonal.

4. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The shape of the joint between the pipe wall and the inner bend I is the same.

5. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, Each inner bend II consists of crests and troughs, with the crests and troughs closely fitted to the adjacent pipe wall, and the contact surfaces being either point contact or surface contact.

6. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The connection surface between the crest and trough of the inner bend II can be a smooth surface, a perforated surface, a corrugated surface, or a windowed surface.

7. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The heat pipe section I and section II have the same forming structure, and their shapes are either symmetrical or asymmetrical.

8. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The joint is a bend I, which consists of a left bend and a right bend, with the wide side of the left bend and the wide side of the right bend closely fitted together.

9. A multi-channel reinforced heat dissipation pipe as described in claim 1, characterized in that, The bonding connection method involves the materials being tightly bonded together and then brazed to form a closed state.

10. The heat dissipation pipe according to claim 1, characterized in that, The heat sink is made from metal material through leveling, bending, folding, and repeated bending and folding. The forming process includes the following steps: S1: Includes three sides: the first side, the second side, and the third side, which are formed by bending and connected to each other as one unit. The first side and the second side are bent to the left, and the second side and the third side are bent to the right. The first side and the third side are on the same horizontal line. S2: Continue bending on the first and third sides to form an inner bend II on the first and third sides; S3: Repeat step S2 several times to form several inner bends II; S4: The ends of the first and third sides are rolled into an inner bend I; S5: Using the left bend and right bend as edges, fold the first and third edges after bending back towards the second edge for the first time; S6: After S5 is folded back, the left side is folded back a second time with the length of inner bend I, inner bend II and left bend, and the right side is folded back a second time with the length of inner bend I, inner bend II and right bend, so that the left bend and right bend fit together to form a heat dissipation pipe; S7: After the heat dissipation tube is formed, cut it to the required length.

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