Turbulence generator, heat exchanger and water heater

Abstract

The utility model discloses a turbulence generator, a heat exchanger and a water heater, and relates to the technical field of heat exchange equipment, the turbulence generator is used for being installed in a heat exchange tube, and the turbulence generator comprises a turbulence main body and flow deflectors; the turbulence main body extends along the length direction of the heat exchange tube; the flow deflectors are arranged on the turbulence body, and the ends of the flow deflectors incline in the direction away from the turbulence body and incline in the direction of fluid in the heat exchange pipes. An opening is formed in the end part of the flow deflector. According to the technical scheme provided by the utility model, the turbulence generator not only can strengthen heat transfer in the heat exchange tube, but also cannot generate larger resistance to fluid in the heat exchange tube.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, and particularly relates to a turbulence generator, a heat exchanger and a water heater. Background Art

[0002] The heat exchanger in a gas water heater undertakes the heat exchange task between high-temperature flue gas and water. Among them, the high-temperature flue gas flows outside the tube and exchanges heat with the water in the heat exchange tube. However, the water in the heat exchange tube often forms scale and deposits on the inner wall of the heat exchange tube, affecting the heat transfer inside the heat exchange tube and increasing the flow resistance inside the heat exchange tube, thus seriously affecting the amount of fluid inside the heat exchange tube. Therefore, the enhanced convective heat transfer technology is adopted to solve the problem of scale formation in the wall boundary layer and improve the heat transfer efficiency inside the tube.

[0003] In the related art, for the enhanced convective heat transfer technology to improve the heat exchange efficiency inside the heat exchange tube of the water heater and the problem of scale formation in the boundary layer, the main measure is to arrange a turbulence generator inside the heat exchange tube, so that when the water flows and transfers heat, the development of the boundary layer is destroyed, and the turbulent heat transfer inside the heat exchange tube is enhanced. However, the arrangement of the turbulence generator will generate a large resistance to the fluid inside the heat exchange tube. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a turbulence generator, a heat exchanger and a water heater, aiming to provide a turbulence generator that can enhance the heat transfer inside the heat exchange tube and will not generate a large resistance to the fluid inside the heat exchange tube.

[0005] To achieve the above purpose, a turbulence generator proposed by the utility model is used to be installed inside a heat exchange tube, and the turbulence generator includes:

[0006] A turbulence main body extending along the length direction of the heat exchange tube;

[0007] A guide vane arranged on the turbulence main body, the end of the guide vane is inclined away from the turbulence main body and inclined along the fluid direction inside the heat exchange tube; an opening is arranged at the end of the guide vane.

[0008] In an embodiment, along the direction from the root to the end of the guide vane, the width of the opening gradually increases.

[0009] In an embodiment, the opening is a V-shaped opening.

[0010] In an embodiment, defining the depth of the V-shaped opening as h, then it satisfies: 2mm < h < 8mm;

[0011] And / or, defining the maximum width of the V-shaped opening as L, then it satisfies: 2mm < L < 6mm.

[0012] In one embodiment, an angle α between the flow guiding fin and the turbulent main body is defined, and it satisfies: 30° < α < 60°.

[0013] In one embodiment, along the direction from the root to the end of the flow guiding fin, the width of the flow guiding fin gradually increases.

[0014] In one embodiment, the turbulent main body has a first surface and a second surface which are oppositely arranged, and the flow guiding fins are arranged on both the first surface and the second surface.

[0015] In one embodiment, the flow guiding fins arranged on the first surface and the flow guiding fins arranged on the second surface are alternately and spacedly distributed in the length direction of the turbulent main body.

[0016] In one embodiment, the turbulent main body is provided with a plurality of through holes, and the plurality of through holes are spacedly distributed along the length direction of the turbulent main body.

[0017] In one embodiment, a flow guiding fin is provided at the water inlet end of each through hole;

[0018] And / or, a pitch x between two adjacent through holes is defined, and it satisfies: 16 mm ≤ x ≤ 30 mm.

[0019] In one embodiment, the through hole is one of a trapezoidal hole and a rectangular hole.

[0020] In one embodiment, when the through hole is a trapezoidal hole, the width of the through hole gradually increases along the direction of the fluid in the heat exchange tube.

[0021] To achieve the above object, the present invention further provides a heat exchanger, including:

[0022] A heat exchange tube;

[0023] The turbulent flow generator as described above is arranged inside the heat exchange tube.

[0024] To achieve the above object, the present invention further provides a water heater, including the heat exchanger as described above.

[0025] The technical solution of the present utility model is provided with guide vanes on the main body of the turbulence, and openings are provided at the ends of the guide vanes. As the fluid flows in the heat exchange tube, when the fluid flows through the guide vanes, part of the fluid can be guided to the tube wall of the heat exchange tube through the guide vanes, so as to turbulize the flowing fluid to form eddy currents, which can ensure that the fluid can fully exchange heat with the heat exchange tube, so as to thin the boundary layer near the tube wall and achieve the effect of strengthening heat transfer; at the same time, since openings are provided at the ends of the guide vanes, part of the fluid flows out from the openings of the guide vanes, and secondary eddy currents are formed at the openings, strengthening the boundary layer disturbance and promoting the mixing of hot and cold fluids, so as to further thin the boundary layer near the tube wall. At the same time, the velocity of the fluid on the tube wall is also increased, which can reduce the flow resistance, increase the flow velocity in the heat exchange tube, inhibit the formation of scale on the tube wall, and play a role in strengthening heat transfer.

[0026] Therefore, the turbulence generator proposed by this solution can not only strengthen the heat transfer in the heat exchange tube, but also will not generate a large resistance to the fluid in the heat exchange tube. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0028] Figure 1 It is a schematic structural diagram of an embodiment of the turbulence generator provided by the present utility model;

[0029] Figure 2 For Figure 1 The partial enlarged view at A in

[0030] Figure 3 It is a side view of an embodiment of the turbulence generator provided by the present utility model;

[0031] Figure 4 For Figure 3 The partial enlarged view at B in

[0032] Figure 5 It is a top view of an embodiment of the turbulence generator provided by the present utility model;

[0033] Figure 6 It is a schematic structural diagram of a perspective view of an embodiment of the heat exchanger provided by the present utility model;

[0034] Figure 7 It is a schematic structural diagram of another perspective view of an embodiment of the heat exchanger provided by the present utility model.

[0035] Explanation of the reference numerals in the drawings:

[0036] Reference numeral Name Reference numeral Name 100 Heat exchanger 112 Flanging structure 10 Turbulence generator 12 Flow deflector 11 Turbulent main body 121 Opening 111 Through port 20 Heat exchange tube

[0037] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments and with reference to the accompanying drawings. Specific embodiments

[0038] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] The heat exchanger in a gas water heater undertakes the heat exchange task between high-temperature flue gas and water. Among them, the high-temperature flue gas flows outside the tube and exchanges heat with the water in the heat exchange tube. However, the water in the heat exchange tube often forms scale and deposits on the inner wall of the heat exchange tube, affecting the heat transfer inside the heat exchange tube and increasing the flow resistance inside the heat exchange tube, thereby seriously affecting the size of the fluid volume inside the heat exchange tube. Therefore, the enhanced convective heat transfer technology is adopted to solve the problem of scale formation in the wall boundary layer and improve the heat transfer efficiency inside the tube.

[0042] In the related art, for the technology of enhancing convective heat transfer to improve the heat transfer efficiency and the problem of boundary layer fouling in the heat exchange tube of a water heater, the main measure lies in arranging a turbulence generator inside the heat exchange tube, so that when water flows and transfers heat, the development of the boundary layer is disrupted, and the turbulent heat transfer inside the heat exchange tube is enhanced. However, the arrangement of the turbulence generator will generate a large resistance to the fluid inside the heat exchange tube.

[0043] Based on the above problems, the present utility model proposes a turbulence generator 10 that can both enhance heat transfer inside the heat exchange tube 20 and will not generate a large resistance to the fluid inside the heat exchange tube 20. The turbulence generator 10 is applied to a heat exchanger 100. The heat exchanger 100 includes a heat exchange tube 20 and a turbulence generator 10 installed inside the heat exchange tube 20. The turbulence main body 11 of the turbulence generator 10 extends along the length direction of the heat exchange tube 20. After the fluid enters the heat exchange tube 20, the turbulence generator 10 can disturb the fluid, so as to enhance heat transfer inside the heat exchange tube 20 while not generating a large resistance to the fluid inside the heat exchange tube 20. The structure of the turbulence generator 10 will be described below in the form of embodiments.

[0044] Please refer to Figures 1 to 5 , in an embodiment of the present utility model, the turbulence generator 10 is used to be installed inside the heat exchange tube 20. The turbulence generator 10 includes a turbulence main body 11 and a guide vane 12; the turbulence main body 11 extends along the length direction of the heat exchange tube 20; the guide vane 12 is arranged on the turbulence main body 11, and the end of the guide vane 12 inclines away from the turbulence main body 11 and inclines along the fluid direction inside the heat exchange tube 20; an opening 121 is provided at the end of the guide vane 12.

[0045] It can be understood that the turbulence main body 11 can be in the shape of a long strip plate structure. The plate surface of the turbulence main body 11 is arranged opposite to the tube wall of the heat exchange tube 20. The root of the guide vane 12 is connected to the plate surface of the turbulence main body 11. The end of the guide vane 12 inclines away from the turbulence main body 11, that is, inclines towards the tube wall of the heat exchange tube 20, and inclines along the fluid direction inside the heat exchange tube 20 to divert the fluid flowing through the guide vane 12 to the tube wall of the heat exchange tube 20.

[0046] In actual application, the shape of the opening 121 at the end of the guide vane 12 can specifically be in the shape of a V, U, or C, etc. As long as it is ensured that part of the fluid can flow out from the opening 121 and a secondary eddy current is formed at the opening 121, no specific limitation is made here.

[0047] Moreover, the guide vane 12 and the turbulence main body 11 can be an integral structure, which can not only ensure the connection reliability between the guide vane 12 and the turbulence main body 11, but also simplify the manufacturing process. Of course, in other embodiments, the guide vane 12 and the turbulence main body 11 can also be a split structure and be fixedly connected to the turbulence main body 11 by means of bonding, screw connection, welding, etc.

[0048] It should be noted that the turbulence generator 10 can be installed in the heat exchange tube 20 with a circular cross-section, or can be installed in the heat exchange tube 20 with an elliptical cross-section. When the turbulence generator 10 is installed in the heat exchange tube 20 with an elliptical cross-section, the guide vane 12 can be inclined towards the tube wall corresponding to the major axis of the heat exchange tube 20, so as to avoid the situation that the distance between the intermediate fluid and the tube wall of the heat exchange tube 20 is relatively far when the fluid flows through the heat exchange tube 20, resulting in uneven heating.

[0049] In summary, the technical solution of the present utility model is provided with a guide vane 12 on the turbulence main body 11, and an opening 121 is provided at the end of the guide vane 12. As the fluid flows in the heat exchange tube 20, when the fluid flows through the guide vane 12, part of the fluid can be diverted to the tube wall of the heat exchange tube 20 through the guide vane 12 to turbulize the flowing fluid to form eddy currents, which can ensure that the fluid can fully exchange heat with the heat exchange tube 20 to thin the boundary layer near the tube wall and achieve the effect of strengthening heat transfer; at the same time, since an opening 121 is provided at the end of the guide vane 12, part of the fluid flows out from the opening 121 of the guide vane 12, and a secondary eddy current is formed at the opening 121, strengthening the boundary layer disturbance, promoting the mixing of hot and cold fluids, further thinning the boundary layer near the tube wall, and at the same time increasing the velocity of the fluid on the tube wall, which can reduce the flow resistance, increase the flow velocity in the heat exchange tube 20, inhibit the formation of scale on the tube wall, and play a role in strengthening heat transfer.

[0050] Therefore, the turbulence generator 10 proposed by this solution can not only strengthen the heat transfer in the heat exchange tube 20, but also will not generate a large resistance to the fluid in the heat exchange tube 20.

[0051] Please refer to Figure 1 、 Figure 2 , in an embodiment of the present utility model, along the direction from the root to the end of the guide vane 12, the width of the opening 121 gradually increases.

[0052] With such a setting, as the fluid flows in the heat exchange tube 20, when the fluid flows through the guide vane 12, since the width of the opening 121 gradually increases along the direction from the root to the end of the guide vane 12, when part of the fluid flows out from the opening 121 of the guide vane 12, it can enhance the effect of turbulizing the flowing fluid to form a better eddy current effect, achieve the purpose of strengthening heat transfer, and at the same time effectively reduce the flow resistance of the fluid.

[0053] It should be noted that the width of the opening 121 refers to the distance between the opposite side walls of the opening 121.

[0054] Please refer to Figure 1 、 Figure 2 , in an embodiment of the present utility model, the opening 121 is a V-shaped opening 121.

[0055] With such a setting, compared with other shapes, the design of the V-shaped opening 121 enables the deflector 12 to fully deflect the fluid to the tube wall of the heat exchange tube 20, ensuring that the fluid can fully exchange heat with the heat exchange tube 20, achieving the effect of enhancing heat transfer. At the same time, a stronger vortex effect can be formed, effectively reducing the flow resistance of the fluid in the heat exchange tube 20.

[0056] It should be noted that when the depth of the V-shaped opening 121 is too shallow, not enough fluid will flow out from the opening 121, resulting in a poor vortex effect at the opening 121 and a large resistance of the fluid. When the depth of the V-shaped opening 121 is too deep, the area of the deflector 12 will be too small. On the one hand, it will affect the strength of the deflector 12, causing the deflector 12 to deform under the impact of the water pressure when the fluid flows through the deflector 12. On the other hand, it will affect the flow rate of the deflector 12 guiding the fluid to the tube wall of the heat exchange tube 20, thereby affecting the effect of enhancing heat transfer.

[0057] Based on this, please refer to Figure 2 , in an embodiment of the present invention, the depth of the V-shaped opening 121 is defined as h, and it satisfies: 2mm < h < 8mm.

[0058] With such a setting, by controlling the depth of the V-shaped opening 121 between 2mm and 8mm, the intensity of the secondary vortex flowing through the V-shaped opening 121 can be increased, and at the same time, the boundary layer thickness can be effectively reduced to achieve the effect of enhancing turbulent heat transfer in the heat exchange tube 20.

[0059] As some examples, the depth of the V-shaped opening 121 can specifically be 2.1mm, 2.7mm, 3mm, 3.2mm, 4mm, 4.6mm, 5mm, 5.3mm, 6mm, 6.5mm, 7mm, 7.4mm, 7.8mm, etc.

[0060] It should be noted that when the maximum width of the V-shaped opening 121 is too small, not enough fluid will flow out from the opening 121, resulting in a poor vortex effect at the opening 121 and a large resistance of the fluid. When the maximum width of the V-shaped opening 121 is too large, the distance between the V-shaped opening 121 and the side wall of the deflector 12 will be too small, also resulting in too small an area of the deflector 12. On the one hand, it will affect the strength of the deflector 12, causing the deflector 12 to deform under the impact of the water pressure when the fluid flows through the deflector 12. On the other hand, it will affect the flow rate of the deflector 12 guiding the fluid to the tube wall of the heat exchange tube 20, thereby affecting the effect of enhancing heat transfer.

[0061] Based on this, please refer to Figure 2, in an embodiment of the present utility model, the maximum width of the V-shaped opening 121 is defined as L, and it satisfies: 2 mm < L < 6 mm.

[0062] By setting it in this way, by controlling the maximum width of the V-shaped opening 121 between 2 mm and 6 mm, the intensity of the secondary eddy current flowing through the V-shaped opening 121 can be improved, and at the same time, the boundary layer thickness can be effectively thinned to achieve the effect of enhancing the turbulent heat transfer in the heat exchange tube 20.

[0063] As some examples, the maximum width of the V-shaped opening 121 can specifically be 2.1 mm, 2.7 mm, 3 mm, 3.2 mm, 4 mm, 4.6 mm, 5 mm, 5.3 mm, 5.9 mm, etc.

[0064] It should be noted that when the angle between the guide vane 12 and the turbulent main body 11 is too small, the guide vane 12 cannot direct enough flow to the tube wall of the heat exchange tube 20, resulting in poor heat transfer enhancement effect; and when the angle between the guide vane 12 and the turbulent main body 11 is larger, the resistance to the fluid is greater. Therefore, when the angle between the guide vane 12 and the turbulent main body 11 is too large, the resistance of the fluid will be large.

[0065] Based on this, please refer to Figure 4 , in an embodiment of the present utility model, the angle between the guide vane 12 and the turbulent main body 11 is defined as α, and it satisfies: 30° < α < 60°.

[0066] By setting it in this way, by controlling the angle between the guide vane 12 and the turbulent main body 11 between 30° and 60°, the resistance of the fluid can be reduced while ensuring the heat transfer enhancement effect.

[0067] As some examples, the angle between the guide vane 12 and the turbulent main body 11 can specifically be 31°, 36°, 37°, 40°, 41°, 43°, 46°, 50°, 52°, 55°, 56°, 59°, etc.

[0068] Please refer to Figure 2 , in an embodiment of the present utility model, along the direction from the root to the end of the guide vane 12, the width of the guide vane 12 gradually increases.

[0069] With such an arrangement, as the fluid flows in the heat exchange tube 20, when the fluid flows through the flow guiding fins 12, since the width of the flow guiding fins 12 gradually increases in the direction from the root to the end, the fluid can be fully guided to the wall of the heat exchange tube 20, further increasing the velocity of the fluid on the tube wall and achieving the purpose of enhancing heat transfer. In addition, the larger the width of the flow guiding fins 12, the larger the width of the opening 121 can be correspondingly set. When part of the fluid flows out from the opening 121 of the flow guiding fins 12, it can enhance the turbulence effect on the flowing fluid to form a better eddy current effect.

[0070] Please refer to Figure 3 , in an embodiment of the present invention, the turbulent main body 11 has a first surface and a second surface arranged opposite to each other, and flow guiding fins 12 are provided on both the first surface and the second surface.

[0071] With such an arrangement, when the fluid flows through the turbulence generator 10, the flow guiding fins 12 on the first surface and the second surface can guide the flowing fluid. The fluid is guided by the upstream surface of the flow guiding fins 12 to flow towards the wall of the heat exchange tube 20, and an eddy current is formed on the downstream surface of the flow guiding fins 12. Moreover, the flow guiding fins 12 provided on the first surface and the flow guiding fins 12 provided on the second surface are spaced apart by the turbulent main body 11, and eddy currents can be formed in both the upper and lower regions of the turbulent main body 11 in the height direction of the cross section of the heat exchange tube 20 to meet the requirement that the fluid can be fully mixed and heat exchanged under a cross section with a relatively large height dimension.

[0072] It should be noted that the first surface and the second surface of the turbulent main body 11 are two opposite plate surfaces of the turbulent main body 11.

[0073] In actual application, the number of the flow guiding fins 12 provided on the first surface and the number of the flow guiding fins 12 provided on the second surface may be the same or different.

[0074] Please refer to Figure 3 , in an embodiment of the present invention, the flow guiding fins 12 provided on the first surface and the flow guiding fins 12 provided on the second surface are alternately and spacedly distributed in the length direction of the turbulent main body 11.

[0075] With such an arrangement, the interaction between the flow guiding fins 12 provided on the first surface and the flow guiding fins 12 provided on the second surface can be reduced, and excessive resistance to the fluid flowing through the heat exchange tube 20 can be avoided to ensure the smooth flow of the fluid.

[0076] Please refer to Figure 1 , Figure 2 , Figure 5 , in an embodiment of the present invention, the turbulent main body 11 is provided with a plurality of through holes 111, and the plurality of through holes 111 are spacedly distributed along the length direction of the turbulent main body 11.

[0077] With such a setting, the arrangement of the through-holes 111 enables the fluids in the regions on both sides of the main turbulent flow 11 (e.g., the upper and lower regions, the left and right regions) at the cross-sectional height of the heat exchange tubes 20 to flow through the through-holes 111 and mix with each other, thereby making the fluids in the regions on both sides of the main turbulent flow 11 mix evenly, improving the heating uniformity of the fluids, and achieving the effect of enhancing heat transfer.

[0078] In practical applications, the number of the through-holes 111 and the number of the guide vanes 12 can be the same or different.

[0079] Please refer to Figure 2 , in an embodiment of the present invention, a guide vane 12 is provided at the water inlet end of each through-hole 111.

[0080] With such a setting, the eddies formed by the fluids flowing through the guide vanes 12 can be located on both sides of the through-holes 111. Under the action of the eddies, the fluids on both sides of the main turbulent flow 11 can be more fully mixed.

[0081] It should be noted that the water inlet end of the through-hole 111 refers to the end close to the water inlet of the heat exchange tube 20.

[0082] It should be noted that when the pitch between two adjacent through-holes 111 is too large, the density of the corresponding guide vanes 12 is too large, resulting in too few guide vanes 12 being provided, and not enough flow can be directed to the tube wall of the heat exchange tube 20, making the effect of enhancing heat transfer worse; while when the pitch between two adjacent through-holes 111 is too small, the density of the corresponding guide vanes 12 is too small, resulting in too many guide vanes 12 being provided, thus increasing the resistance to the fluid.

[0083] Based on this, please refer to Figure 5 , in an embodiment of the present invention, the pitch between two adjacent through-holes 111 is defined as x, and it satisfies: 16 mm ≤ x ≤ 30 mm.

[0084] With such a setting, by controlling the pitch between two adjacent through-holes 111 between 16 mm and 30 mm, the resistance to the fluid can be reduced while ensuring the effect of enhancing heat transfer.

[0085] As some examples, the pitch between two adjacent through-holes 111 can specifically be 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, etc.

[0086] It should be noted that the pitch between two adjacent through-holes 111 refers to the distance between the water inlet end of one through-hole 111 and the water inlet end of the next through-hole 111.

[0087] Please refer to Figure 2 In an embodiment of the present utility model, the through - opening 111 is one of a trapezoidal opening and a rectangular opening. With such a setting, by using a trapezoidal opening or a rectangular opening as the through - opening 111, the turbulence intensity of the fluid in the heat - exchange tube 20 can be enhanced, and the flow resistance in the heat - exchange tube 20 can be effectively reduced.

[0088] It should be noted that the rectangular opening can specifically be a rectangular - shaped opening or a square - shaped opening.

[0089] Please refer to Figure 2 In an embodiment of the present utility model, when the through - opening 111 is a trapezoidal opening, the width of the through - opening 111 gradually increases along the fluid direction in the heat - exchange tube 20.

[0090] With such a setting, as the fluid flows in the heat - exchange tube 20, when the fluid flows through the turbulence body 11, the fluids in the regions on both sides of the turbulence body 11 can flow through the trapezoidal through - opening 111 to mix more evenly, which can improve the heating uniformity of the fluid and achieve the effect of enhancing heat transfer.

[0091] Please refer to Figure 6 、 Figure 7 The present utility model also provides a heat exchanger 100, which includes a heat - exchange tube 20 and a turbulence generator 10. The specific structure of the turbulence generator 10 refers to the above - mentioned embodiment. Since this heat exchanger 100 adopts all the technical solutions of the above - mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above - mentioned embodiments, which will not be elaborated here one by one. Among them, the turbulence generator 10 is arranged inside the heat - exchange tube 20.

[0092] In this embodiment, the heat exchanger 100 may include multiple heat - exchange tubes 20. The multiple heat - exchange tubes 20 can be arranged in parallel or in series, and the turbulence generator 10 is installed in at least one of the heat - exchange tubes 20. For two adjacent heat - exchange tubes 20, a space for the high - temperature flue gas to flow can be formed between the two adjacent heat - exchange tubes 20.

[0093] In one embodiment, the turbulence generator 10 can be fixedly connected to the tube wall of the heat - exchange tube 20 by welding through the turbulence body 11. Of course, in other embodiments, the turbulence body 11 can also be fixedly connected to the tube wall of the heat - exchange tube 20 by bonding, screw connection, etc.

[0094] Optionally, in order to facilitate the fixed connection of the turbulence generator 10 to the tube wall of the heat exchange tube 20, flanging structures 112 may be respectively provided on both sides of the turbulence body 11. The provision of the flanging structures 112 can increase the connection area (such as the welding area) between the turbulence body 11 and the tube wall of the heat exchange tube 20, so that the turbulence generator 10 can be better fixedly connected to the tube wall of the heat exchange tube 20 through the flanging structures 112.

[0095] The present utility model also provides a water heater, which includes a heat exchanger 100. The specific structure of the heat exchanger 100 refers to the above embodiments. Since this water heater adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0096] In this embodiment, the water heater may further include a housing, a burner and a combustion chamber. The burner and the heat exchanger 100 are both arranged in the housing. The burner is used to burn gas to generate high-temperature flue gas in the combustion chamber. The high-temperature flue gas flows towards the heat exchanger 100 and exchanges heat with the water in the heat exchange tube 20 of the heat exchanger 100 to heat the water flowing through the heat exchange tube 20.

[0097] The above description is only an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the technical concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A turbulence generator for installation inside a heat exchange tube, characterized in that, The turbulence generator includes: a turbulence main body extending along the length direction of the heat exchange tube; flow guiding vanes provided on the turbulence main body, with the ends of the flow guiding vanes inclined away from the turbulence main body and inclined along the fluid direction in the heat exchange tube; openings are provided at the ends of the flow guiding vanes.

2. The turbulence generator according to claim 1, wherein, Along the direction from the root to the end of the flow guiding vane, the width of the opening gradually increases.

3. The turbulence generator according to claim 2, characterized in that The opening is a V-shaped opening.

4. The turbulence generator according to claim 3, wherein, Defining the depth of the V-shaped opening as h, then it satisfies: 2mm < h < 8mm; and / or, defining the maximum width of the V-shaped opening as L, then it satisfies: 2mm < L < 6mm.

5. The turbulator according to any one of claims 1 to 4, characterized in that, Defining the included angle between the flow guiding vane and the turbulence main body as α, then it satisfies: 30° < α < 60°.

6. The turbulator according to any one of claims 1 to 4, characterized in that, Along the direction from the root to the end of the flow guiding vane, the width of the flow guiding vane gradually increases.

7. The turbulator according to any one of claims 1 to 4, characterized in that The turbulence main body has a first surface and a second surface which are oppositely arranged, and the flow guiding vanes are provided on both the first surface and the second surface.

8. The turbulence generator according to claim 7, characterized in that, The flow guiding vanes provided on the first surface and the flow guiding vanes provided on the second surface are alternately and spacedly distributed in the length direction of the turbulence main body.

9. The turbulator according to any one of claims 1 to 4, characterized in that, The turbulence main body is provided with a plurality of through openings, and the plurality of through openings are spacedly distributed along the length direction of the turbulence main body.

10. The turbulence generator according to claim 9, characterized in that, One flow guiding vane is provided at the water inlet end of each through opening; and / or, defining the pitch between two adjacent through openings as x, then it satisfies: 16mm ≤ x ≤ 30mm.

11. The turbulence generator according to claim 9, characterized in that, The through opening is one of a trapezoidal opening and a rectangular opening.

12. The turbulator according to claim 11, characterized in that, When the through opening is a trapezoidal opening, the width of the through opening gradually increases along the fluid direction in the heat exchange tube.

13. A heat exchanger, characterized in that, It includes: a heat exchange tube; the turbulence generator according to any one of claims 1 to 12, provided in the heat exchange tube.

14. A water heater, characterized in that, It includes the heat exchanger according to claim 13.

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