Heat exchanger tube structure and heat exchanger

Abstract

This invention provides a heat exchange tube structure and a heat exchanger. The heat exchange tube structure includes a tube body and multiple turbulence-inducing teeth, all of which are disposed on the inner wall of the tube body and form at least one helical structure. The heat exchange tube structure and heat exchanger provided by this invention utilize turbulence-inducing elements disposed on the inner wall of the tube body to disrupt and turbulent the flow boundary layer, while also turbulenting the fluid in the middle of the tube body. This solves the problem of the inability to disrupt the flow boundary layer in the prior art, effectively improving the heat exchange efficiency of the tube body. When the fluid flows through the turbulence-inducing teeth, it first generates a rotating flow along the helical structure, and the intermittent spacing allows the fluid to collide violently with the turbulence-inducing teeth, enhancing the turbulence. The pointed structure effectively increases the heat exchange area inside the tube, and while piercing the fluid flow boundary layer, the pointed structure also intensifies the turbulence of the fluid inside the tube, enhancing the fluid turbulence and reducing the heat transfer resistance, further improving the heat exchange efficiency of the heat exchange tube structure.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and in particular to a heat exchange tube structure and a heat exchanger. Background Technology

[0002] With the rapid development of the global economy, the demand for energy in today's society is increasing, and high-efficiency heat exchangers have become a research hotspot in the field. Among them, heat exchange tubes, one of the core components of heat exchangers, have also received widespread attention. The external surface processing technology of existing evaporator tubes and condenser tubes on the market is different, and the external teeth, channels or fins formed are also unique. However, the internal processing of heat exchange tubes is limited to the additional placement of spiral-shaped flow-dispersing elements to turbulence the fluid in the middle part of the tube. However, these flow-dispersing elements cannot destroy the flow boundary layer formed by the fluid inside the tube, and still cannot solve the problem of low heat exchange efficiency caused by the flow boundary layer on the inner wall of the tube. Summary of the Invention

[0003] To address the technical problem of low heat exchange efficiency caused by simply placing additional flow-disrupting elements inside the heat exchange tube without disrupting the flow boundary layer inside the tube, a heat exchange tube structure and heat exchanger are provided that disrupts and turbulents the flow boundary layer by setting flow-disrupting elements on the inner wall of the tube.

[0004] A heat exchange tube structure includes: a tube body; a plurality of turbulence teeth, all of which are disposed on the inner wall of the tube body and all of which constitute at least two helical structures, and a helical flow channel is formed between two adjacent helical structures; each helical structure includes at least two turbulence teeth, and there is a gap between two adjacent turbulence teeth in the same helical structure.

[0005] The turbulence tooth includes at least one tip structure, the sharp corner of which points inward toward the inside of the tube.

[0006] The turbulence tooth includes a connecting section, the first end of which is disposed on the inner wall of the tube body, and the tip structure is disposed on the second end of the connecting section.

[0007] The number of the pointed structure is one, and the cross-section of the pointed structure is rhomboid, with one of the pointed corners of the rhombus pointing towards the interior of the tube.

[0008] The turbulence tooth includes a support portion, which is disposed on the second end of the connecting section, and the tip structure is disposed on the support portion.

[0009] The number of the tip structures is two, including a side tip structure and a middle tip structure. The middle tip structure is disposed in the middle of the support portion, and the side tip structure is disposed on one side of the middle tip structure.

[0010] The number of the tip structures is three, including two side tip structures and one central tip structure. The central tip structure is located in the middle of the support portion, one side tip structure is located on one side of the central tip structure, and the other side tip structure is located on the other side of the central tip structure.

[0011] The two side tip structures are arranged symmetrically.

[0012] The cross-section of the side tip structure is triangular, with any side of the triangle abutting against the support portion; and / or, any corner of the triangle is located on the edge of the support portion.

[0013] The cross-section of the side tip structure is a right triangle, with the hypotenuse of the right triangle facing the middle tip structure; and / or, the right angle of the right triangle is located at the edge of the support portion.

[0014] The distance from the vertex of the tip of the middle tip structure to the inner wall of the tube is greater than the distance from the vertex of the tip of the side tip structure to the inner wall of the tube.

[0015] The cross-section of the central tip structure is elliptical; and / or, the cross-section of the side tip structure is elliptical.

[0016] The cross-section of the side tip structure includes an ellipse or a triangle.

[0017] The angle of the sharp corner of the side tip structure ranges from 10° to 50°.

[0018] The angle of the pointed tip of the midpoint structure ranges from 25° to 90°.

[0019] The cross-section of the bearing part is trapezoidal, the upper base of the trapezoid is located on the second end of the connecting section, and the pointed structure is located on the lower base of the trapezoid.

[0020] The spiral angle of the spiral structure ranges from 15° to 70°.

[0021] The number of turbulence teeth on the cross-section of the tube ranges from 10 to 60.

[0022] The height of the turbulence-causing teeth ranges from 0.3 mm to 0.7 mm.

[0023] In two adjacent spiral structures, the distance between the location of the turbulence tooth in one spiral structure and the location of the adjacent turbulence tooth in the other spiral structure ranges from 0.25 mm to 1.6 mm.

[0024] The connecting section has a circular cross-section, and the diameter of the circle ranges from 0.08 mm to 0.3 mm.

[0025] The height of the connecting section ranges from 0.08 mm to 0.3 mm.

[0026] The height of the supporting part ranges from 0.07 mm to 0.15 mm.

[0027] The angle between the upper base and the waist of the trapezoid ranges from 130° to 165°.

[0028] A heat exchanger comprising the heat exchange tube structure described above.

[0029] The heat exchange tube structure and heat exchanger provided by this invention utilize flow-disrupting elements set on the inner wall of the tube to disrupt and turbulent the flow boundary layer. Simultaneously, it can also turbulentize the fluid in the middle of the tube, solving the problem of existing technologies being unable to disrupt the flow boundary layer. This effectively improves the heat exchange efficiency of the tube. When the fluid flows through the flow-disrupting teeth, it first rotates along the spiral structure, and the intermittent spacing allows the fluid to collide violently with the flow-disrupting teeth, intensifying the turbulence. The pointed structure effectively increases the heat exchange area inside the tube. While piercing the fluid flow boundary layer, the pointed structure also intensifies the turbulence of the fluid inside the tube, enhancing the fluid turbulence and reducing heat transfer resistance, further improving the heat exchange efficiency of the heat exchange tube structure. Attached Figure Description

[0030] Figure 1 A schematic diagram of the heat exchanger tube structure of an embodiment of the heat exchanger tube structure and heat exchanger provided by the present invention;

[0031] Figure 2 for Figure 1 A partial schematic diagram of point A;

[0032] Figure 3 A schematic diagram of the turbulence-dispersing teeth in an embodiment of the heat exchanger tube structure and heat exchanger provided by the present invention;

[0033] In the picture:

[0034] 1. Tube body; 2. Turbation teeth; 3. Spacing; 4. Tip structure; 21. Connecting section; 22. Bearing part; 41. Side tip structure; 42. Middle tip structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0036] like Figures 1 to 3 The heat exchange tube structure shown includes a tube body 1 and multiple turbulence-inducing teeth 2. All the turbulence-inducing teeth 2 are disposed on the inner wall of the tube body 1, and all the turbulence-inducing teeth 2 form at least one helical structure. The turbulence-inducing teeth 2, disposed on the inner wall of the tube body 1, effectively increase the heat exchange area of ​​the inner wall of the tube body 1, thereby improving the heat exchange efficiency of the heat exchange tube structure. Simultaneously, the fluid entering the tube body 1 will rotate and flow according to the helical structure when passing through the turbulence-inducing teeth 2. At this time, the turbulence-inducing teeth 2 directly disrupt and turbulent the flow boundary layer on the inner wall of the tube body 1, reducing heat transfer resistance. This overcomes the problem in the prior art where the flow boundary layer cannot be disrupted, thus affecting the heat exchange efficiency of the tube body 1, and effectively increases the heat exchange efficiency of the heat exchange tube structure.

[0037] The number of spiral structures is at least two, and a spiral flow channel is formed between two adjacent spiral structures. The fluid is divided into multiple parts by the flow-diverting effect of the spiral structures and enters the corresponding spiral flow channels, further increasing the turbulence effect of the turbulence teeth 2 and enhancing the degree of turbulence.

[0038] Each of the spiral structures includes at least two turbulence teeth 2, and in the same spiral structure, there is a spacing 3 between two adjacent turbulence teeth 2. While the fluid flows in a spiral under the guidance of the spiral structure, the fluid can violently collide with the turbulence teeth 2 when passing through the spacing 3, thereby further enhancing the turbulence effect.

[0039] like Figure 3 As shown, the turbulence-inducing tooth 2 includes at least one pointed structure 4, the sharp corner of which points inward toward the interior of the tube body 1. The turbulence-inducing effect of the turbulence-inducing tooth 2 is increased by using the pointed structure 4 to increase its size. Simultaneously, increasing the size of the turbulence-inducing tooth 2 also increases the heat exchange area of ​​the inner wall of the tube body 1. Furthermore, the sharp corner of the pointed structure 4 can disrupt the flow of the fluid, further enhancing the turbulence-inducing effect of the turbulence-inducing tooth 2 and its disruptive effect on the fluid boundary layer.

[0040] The turbulence-inducing tooth 2 includes a connecting section 21, the first end of which is disposed on the inner wall of the tube body 1, and the tip structure 4 is disposed on the second end of the connecting section 21. The connecting section 21 facilitates the installation of the tip structure 4 on the inner wall of the tube body 1.

[0041] The number of the pointed structure 4 is one, and the cross-section of the pointed structure 4 is rhomboid, with one sharp corner of the rhombus pointing towards the interior of the tube body 1. Preferably, part of the pointed structure 4 is submerged in the connecting section 21, that is, the first sharp corner of the rhombus points towards the interior of the tube body 1, and the second sharp corner opposite to the first sharp corner is submerged in the connecting section 21 to increase the connection strength.

[0042] The turbulence tooth 2 includes a support portion 22, which is disposed on the second end of the connecting section 21. The tip structure 4 is disposed on the support portion 22, and the support portion 22 increases the reliability of the fixation of the tip structure 4.

[0043] As one embodiment, the number of the tip structures 4 is two, including a side tip structure 41 and a middle tip structure 42. The middle tip structure 42 is disposed in the middle of the support portion 22, and the side tip structure 41 is disposed on one side of the middle tip structure 42. That is, by using two tip structures 4, the heat exchange area of ​​the turbulence-inducing teeth 2 is increased. At the same time, the two tip structures 4 can further turbulentize the fluid, increase the degree of turbulence, and increase the turbulence-inducing teeth 2 on the fluid and the disruption of the fluid boundary layer, thereby preventing fluid accumulation.

[0044] In another embodiment, the number of the tip structures 4 is three. These three tip structures 4 include two side tip structures 41 and one central tip structure 42. The central tip structure 42 is located in the middle of the support portion 22, one side tip structure 41 is located on one side of the central tip structure 42, and the other side tip structure 41 is located on the other side of the central tip structure 42. That is, by using three tip structures 4, the heat exchange area of ​​the turbulence-inducing teeth 2 is increased. Simultaneously, the three tip structures 4 can further turbulentize the fluid, increasing the degree of turbulence and enhancing the turbulence-inducing effect of the turbulence-inducing teeth 2 on the fluid and its disruption of the fluid boundary layer, thereby preventing fluid accumulation.

[0045] The two side tip structures 41 are symmetrically arranged, that is, the two side tip structures 41 are respectively arranged at opposite ends of the support portion 22.

[0046] The side tip structure 41 has a triangular cross-section, with any side of the triangle abutting against the support portion 22; and / or, any corner of the triangle is located on the edge of the support portion 22. One corner of the triangle forms the sharp corner of the side tip structure 41 for cutting and turbulenting the fluid. To ensure the reliable fixation of the side tip structure 41, one side of the triangle can be fixed as a fixed side. At the same time, to ensure that the side tip structure 41 does not produce other negative effects during the turbulence of the fluid, one sharp corner of the triangle can coincide with the edge of the support portion 22, so that the side tip structure 41 and the support portion 22 form a continuous shape, effectively turbulenting the fluid and preventing fluid accumulation.

[0047] The side tip structure 41 has a cross-section of a right triangle, with the hypotenuse of the right triangle facing the middle tip structure 42; and / or, the vertex of the right triangle is located at the edge of the support portion 22.

[0048] The distance from the vertex of the tip of the middle tip structure 42 to the inner wall of the tube body 1 is greater than the distance from the vertex of the tip of the side tip structure 41 to the inner wall of the tube body 1.

[0049] As another embodiment not shown in the figures, the cross-section of the central tip structure 42 is elliptical; and / or, the cross-section of the side tip structure 41 is elliptical.

[0050] The cross-section of the side tip structure 41 may be elliptical, triangular, or irregular in shape. The specific shape will be determined based on actual needs and the specific parameters of the fluid.

[0051] The angle θ2 of the sharp corner of the side tip structure 41 ranges from 10° to 50°, preferably 25°.

[0052] The angle of the pointed tip structure 42 ranges from 25° to 90°, preferably 50°.

[0053] The cross-section of the bearing part 22 is trapezoidal, with the upper base of the trapezoid located on the second end of the connecting section 21, and the tip structure 4 located on the lower base of the trapezoid. By adjusting the size of the lower base of the trapezoid, the number of tip structures 4 installed and the spacing 3 between adjacent tip structures 4 are increased, thereby avoiding fluid accumulation caused by overly dense installation of the tip structures 4 and ensuring the turbulence effect of the turbulence teeth 2.

[0054] The spiral angle of the spiral structure ranges from 15° to 70°, preferably 45°.

[0055] On the cross-section of the tube body 1, the number of the turbulence-inducing teeth 2 ranges from 10 to 60, preferably 35. The cross-section of the tube body 1 is a cross section perpendicular to its axis. Based on the number of turbulence-inducing teeth 2 on the cross-section of the tube body 1, the number of spiral structures formed within the tube body 1 can be determined. For example, if there are 10 fluid-encircling teeth on the cross-section of the tube body 1, then there are also 10 spiral structures within the tube body 1, forming 10 spiral flow channels.

[0056] The height h3 of the turbulence tooth 2 ranges from 0.3 mm to 0.7 mm, preferably 0.5 mm.

[0057] In two adjacent spiral structures, the distance L2 between the location of the turbulence tooth 2 in one spiral structure and the location of the adjacent turbulence tooth 2 in the other spiral structure ranges from 0.25 mm to 1.6 mm, preferably 0.9 mm.

[0058] The cross-section of the connecting segment 21 is circular, and the diameter L1 of the circle ranges from 0.08 mm to 0.3 mm, preferably 0.15 mm.

[0059] The height h1 of the connecting segment 21 ranges from 0.08 mm to 0.3 mm, preferably 0.15 mm.

[0060] The height h2 of the bearing portion 22 ranges from 0.07 mm to 0.15 mm, and is preferably 0.1 mm.

[0061] The included angle θ1 between the upper base and the waist of the trapezoid ranges from 130° to 165°, preferably 150°.

[0062] A heat exchanger comprising the heat exchange tube structure described above.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A heat exchange tube structure, characterized by: The utility model relates to a kind of pipe body (1);Multiple spoiler teeth (2), all the spoiler teeth (2) are arranged on the inner wall of the pipe body (1), and all the spoiler teeth (2) constitute at least two spiral structures, and spiral flow channel is formed between adjacent two spiral structures; Each spiral structure includes at least two spoiler teeth (2), and there is a spacing (3) between adjacent two spoiler teeth (2) in the same spiral structure. The spoiler tooth (2) includes at least one tip structure (4), and the sharp corner of the tip structure (4) points to the inside of the pipe body (1). The spoiler tooth (2) includes a connecting segment (21), the first end of the connecting segment (21) is arranged on the inner wall of the pipe body (1), and the tip structure (4) is arranged on the second end of the connecting segment (21). The spoiler tooth (2) includes a bearing portion (22), the bearing portion (22) is arranged on the second end of the connecting segment (21), and the tip structure (4) is arranged on the bearing portion (22). The number of the tip structure (4) is two, and the two tip structures (4) include a side tip structure (41) and a middle tip structure (42), the middle tip structure (42) is arranged in the middle of the bearing portion (22), and the side tip structure (41) is arranged on one side of the middle tip structure (42). Or, the number of the tip structure (4) is three, and the three tip structures (4) include two side tip structures (41) and a middle tip structure (42), the middle tip structure (42) is arranged in the middle of the bearing portion (22), one side tip structure (41) is arranged on one side of the middle tip structure (42), and the other side tip structure (41) is arranged on the other side of the middle tip structure (42). The number of the tip structure (4) is one, and the cross section of the tip structure (4) is rhombic, one sharp corner of the rhombic points to the inside of the pipe body (1). The two side tip structures (41) are symmetrically arranged.

2. The heat exchange tube structure according to claim 1, characterized by: The cross section of the side tip structure (41) is triangular, and any side of the triangular abuts on the bearing portion (22); and / or, any corner of the triangular is located on the edge of the bearing portion (22).

3. The heat exchange tube structure according to claim 1, wherein: The cross section of the side tip structure (41) is a right-angled triangle, the hypotenuse of the right-angled triangle faces the middle tip structure (42); and / or, the right angle of the right-angled triangle is located at the edge of the bearing portion (22).

4. The heat exchange tube structure according to claim 1, wherein: The distance from the vertex of the sharp corner of the middle tip structure (42) to the inner wall of the pipe body (1) is greater than the distance from the vertex of the sharp corner of the side tip structure (41) to the inner wall of the pipe body (1).

5. The heat exchange tube structure according to claim 4, wherein: The cross section of the middle tip structure (42) is elliptical; and / or, the cross section of the side tip structure (41) is elliptical.

6. The heat exchange tube structure according to claim 1, wherein: The cross section of the side tip structure (41) includes an ellipse or a triangle.

7. The heat exchange tube structure according to claim 1, wherein: The angle of the sharp corner of the side tip structure (41) ranges from 10° to 50°.

8. The heat exchange tube structure according to claim 1, wherein: The angle of the sharp corner of the middle tip structure (42) ranges from 25° to 90°.

9. The heat exchange tube structure according to claim 1, wherein: ​ 10. The heat exchange tube structure according to claim 1, characterized by: ​ 11. The heat exchange tube structure according to claim 1, characterized by: The cross section of the bearing part (22) is trapezoidal, the upper base of the trapezoid is arranged on the second end of the connecting section (21), and the pointed end structure (4) is arranged on the lower base of the trapezoid.

12. The heat exchange tube structure according to claim 1, characterized by: The helix angle of the helical structure ranges from 15° to 70°.

13. The heat exchange tube structure according to claim 1, characterized by: The number of the turbulence teeth (2) on the cross section of the pipe body (1) ranges from 10 to 60.

14. The heat exchange tube structure according to claim 1, characterized by: The height of the turbulence teeth (2) ranges from 0.3 mm to 0.7 mm.

15. The heat exchange tube structure according to claim 1, characterized by: The distance between the arrangement positions of the turbulence teeth (2) in one helical structure and the arrangement positions of the adjacent turbulence teeth (2) in another helical structure ranges from 0.25 mm to 1.6 mm.

16. The heat exchange tube structure according to claim 1, characterized by: The cross section of the connecting section (21) is circular, and the diameter of the circle ranges from 0.08 mm to 0.3 mm.

17. The heat exchange tube structure according to claim 1, characterized by: The height of the connecting section (21) ranges from 0.08 mm to 0.3 mm.

18. The heat exchange tube structure according to claim 1, characterized by: The height of the bearing part (22) ranges from 0.07 mm to 0.15 mm.

19. The heat exchange tube structure according to claim 11, wherein: The included angle between the upper base and the waist of the trapezoid ranges from 130° to 165°.

20. A heat exchanger, characterized by: The heat exchange pipe structure according to any one of claims 1 to 19 is included.

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