Turbulence generator, heat exchanger and water heater

Abstract

The utility model discloses a turbulence generator, heat exchanger and water heater relates to heat exchange equipment technical field, wherein the turbulence generator has first end and second end opposite to each other, the turbulence generator is arranged in spiral extension from first end to second end, the turbulence generator is provided with the notch on its outer edge. According to the technical scheme, the spirally extending turbulence generator is provided and used for being installed in the heat exchange tube, fluid flows in the heat exchange tube, when the fluid flows through the turbulence generator, the fluid can flow along a flow channel of the turbulence generator, and the flowing form of the fluid is changed into rotating flow; meanwhile, part of fluid flows out of the porous structure of the turbulence generator, the circulation resistance of the fluid in the heat exchange pipe is reduced, and the flow speed of the fluid in the pipe is increased; in addition, the fluid flows out from the notch at the edge of the turbulence generator, secondary vortex is formed at the notch, a temperature boundary layer on the side wall of the heat exchange tube is thinned, and the effect of enhancing heat transfer is achieved.

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 pipe and exchanges heat with the water in the heat exchange pipe. In the related prior art, a turbulence generator or the like is usually arranged in the heat exchange pipe to improve the heat exchange efficiency. However, the existing turbulence generators have the problems of single turbulence effect and limited improvement in heat exchange effect. Summary of the Utility Model

[0003] The main object of the utility model is to provide a turbulence generator, a heat exchanger and a water heater, aiming to improve the heat exchange efficiency of the heat exchange pipe.

[0004] To achieve the above object, the turbulence generator proposed by the utility model is used for being installed in the heat exchange pipe. The turbulence generator has opposite first and second ends, and the turbulence generator is spirally extended from the first end to the second end. The turbulence generator is provided with a notch on its outer edge.

[0005] In one embodiment, the turbulence generator is arranged in a long strip shape. The outer edge of the turbulence generator includes oppositely arranged first and second side edges. The first side edge is provided with the notch, and / or the second side edge is provided with the notch.

[0006] In one embodiment, the orthographic projection pattern of the turbulence generator along its extension direction is elliptical.

[0007] In one embodiment, the first side edge and the second side edge are located on opposite sides of the turbulence generator from the first end to the second end; the notches provided on the first side edge and the second side edge correspond to each other in the position of the turbulence generator from the first end to the second end.

[0008] In one embodiment, the turbulence generator includes a plurality of spiral segments, and the plurality of spiral segments are sequentially connected from the first end to the second end. The first side edge and the second side edge of each spiral segment are both provided with the notch.

[0009] In one embodiment, define the major axis length of the turbulence generator as a;

[0010] Define the notch depth h of the notch, then it satisfies: 0.050a < h < 0.100a;

[0011] And / or, define the thickness s of the turbulence generator, then it satisfies: 0.005a < s < 0.050a.

[0012] In one embodiment, the turbulator is provided with through holes along its thickness direction, and the number of the through holes is multiple, and the multiple through holes are arranged at intervals from the first end to the second end.

[0013] In one embodiment, define the major axis length of the turbulator as a;

[0014] Define the distance between any two adjacent through holes as x, then it satisfies: 0.250a < x < 0.500a;

[0015] And / or, define the aperture diameter of the through hole as d, then it satisfies: 0.010a < d < 0.500a.

[0016] In one embodiment, define the twist ratio of the turbulator as Y, then it satisfies: 1.00 ≤ Y ≤ 5.00.

[0017] In one embodiment, the orthographic projection shape of the notch along the length direction of the turbulator is V-shaped, triangular, rectangular, trapezoidal or semi-circular.

[0018] The present utility model also provides a heat exchanger, which includes a heat exchange tube and the turbulator described in any one of the foregoing embodiments, and is arranged inside the heat exchange tube.

[0019] The present utility model also provides a water heater, which includes the heat exchanger described in any one of the foregoing embodiments.

[0020] The technical solution of the present utility model provides a turbulator with a spiral extension. The turbulator is used to be installed inside the heat exchange tube. As the fluid flows inside the heat exchange tube, when the fluid flows through the turbulator, the fluid will flow along the flow channel of the turbulator, and the fluid flow form becomes a swirling flow; at the same time, part of the fluid flows out from the porous structure of the turbulator, reducing the flow resistance of the fluid inside the heat exchange tube and increasing the flow velocity of the fluid inside the tube; in addition, the fluid flows out from the notch at the edge of the turbulator, forming a secondary eddy current at the notch, thinning the temperature boundary layer of the side wall of the heat exchange tube, achieving the effect of enhancing heat transfer; at the same time, the fluid flowing out from the notch also plays a role in reducing the flow resistance of the fluid inside the heat exchange tube. While thinning the temperature boundary layer of the side wall of the heat exchange tube, the fluid velocity of the side wall of the heat exchange tube is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 following drawings 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.

[0022] Figure 1 Schematic diagram of the structure of an embodiment of the turbulence generator provided by the present utility model;

[0023] Figure 2 is Figure 1 the other side view of

[0024] Figure 3 is Figure 1 the partial enlarged view of;

[0025] Figure 4 is Figure 1 the orthographic projection of the shown turbulence generator along its extending direction;

[0026] Figure 5 Schematic diagram of the structure of an embodiment of the heat exchanger provided by the present utility model.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Heat exchanger;

[0029] 10. Turbulence generator; 101. Notch; 102. Through hole; 103. Outer edge; 100. Spiral section;

[0030] 20. Heat exchange tube.

[0031] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to 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.

[0033] 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.

[0034] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, these descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. 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 scope of protection required by the present utility model.

[0035] The present utility model provides a turbulence generator, which is applied to a heat exchanger. The heat exchanger includes heat exchange tubes and a turbulence generator installed inside the heat exchange tubes. The turbulence generator 10 of the turbulence generator extends along the length direction of the heat exchange tubes. After the fluid enters the heat exchange tubes, the turbulence generator disturbs the fluid to enhance the heat transfer inside the heat exchange tubes. The structure of the turbulence generator will be described below by way of embodiments. For the convenience of understanding and description, in the attached Figures 1 to 5 In the manual of the present utility model, the solid arrow indicates a cut or a through hole.

[0036] Please refer to Figures 1 to 5 , in an embodiment of the present utility model, the turbulence generator 10 includes a turbulence generator 10 having opposite first and second ends. The turbulence generator 10 extends spirally from the first end to the second end, and the turbulence generator 10 is provided with a cut 101 on its outer edge 103.

[0037] Among them, the turbulence generator 10 is arranged in a long strip spiral plate shape. Generally speaking, the turbulence generator 10 is inserted into the heat exchange tube 20 from the port at one end of the heat exchange tube 20. It can be understood that in a manufacturing embodiment of the turbulence generator 10, it is obtained by twisting a long strip-shaped substrate according to a certain twist ratio. Or, in some embodiments, it can be obtained by 3D printing or injection molding and other solutions.

[0038] In this embodiment, the first end and the second end refer to the two ends of the turbulence generator 10 in the direction of its length extension. The turbulence generator 10 extends spirally from the first end to the second end. That is to say, the turbulence generator 10 extends spirally along its length direction.

[0039] The turbulator 10 is provided with a notch 101 at its outer edge 103. It should be understood that the outer side wall of the turbulator 10 is recessed into the turbulator 10 to form the notch 101, and the opening of the notch 101 faces the tube wall of the heat exchange tube 20. Thus, in this embodiment, by providing the notch 101 at the outer edge 103 of the turbulator 10, a secondary turbulent flow is formed between the outer wall of the turbulator 10 and the tube wall of the heat exchange tube 20, thereby strengthening the disturbance of the boundary layer of the heat exchange tube 20.

[0040] Furthermore, the shape of the positive projection of the notch 101 along the length direction of the turbulator 10 can be a regular shape such as a V shape, a triangle, a rectangle, a trapezoid or a semi-circular shape, or it can be irregular. Preferably, the shape of the positive projection of the notch 101 along the length direction of the turbulator 10 is set in a V shape. Compared with other shapes, the V-shaped notch 101 helps to induce turbulence during the fluid flow process, thereby improving the mixing and heat transfer effects.

[0041] The technical solution of the present utility model provides a turbulator 10 that extends spirally. The turbulator 10 is used to be installed inside the heat exchange tube 20. As the fluid flows inside the heat exchange tube 20, when the fluid flows through the turbulator 10, the fluid will flow along the flow channel of the turbulator 10, and the fluid flow form becomes a swirling flow; at the same time, part of the fluid flows out from the porous structure of the turbulator 10, reducing the flow resistance of the fluid inside the heat exchange tube 20 and increasing the flow velocity of the fluid inside the tube; in addition, the fluid flows out from the notch 101 at the edge of the turbulator 10, forming a secondary eddy current at the notch 101, thinning the temperature boundary layer of the side wall of the heat exchange tube 20, achieving the effect of strengthening heat transfer; at the same time, the fluid flowing out from the notch 101 also plays a role in reducing the flow resistance of the fluid inside the heat exchange tube 20. While thinning the temperature boundary layer of the side wall of the heat exchange tube 20, by increasing the fluid velocity of the side wall of the heat exchange tube 20, it scours the possible scale formed, inhibits the generation of scale inside the heat exchange tube 20, and prolongs the service life and maintenance cycle of the elliptical heat transfer tube.

[0042] In an exemplary embodiment, the turbulator 10 is arranged in a long strip shape, and the outer edge 103 of the turbulator 10 includes a first side edge and a second side edge that are oppositely arranged. The first side edge is provided with the notch 101, and / or the second side edge is provided with the notch 101.

[0043] It should be noted that the turbulator 10 can be installed inside the heat exchange tube 20 with a circular cross-section, or can be installed inside the heat exchange tube 20 with an elliptical cross-section. Among them, the circular heat exchange tube 20 has the advantages of wide application and strong versatility, while in industrial applications, the elliptical heat exchange tube 20 can effectively reduce the inertial resistance loss during the flue gas flow process and can greatly enhance the heat transfer performance on the flue gas side of the heat exchange tube 20.

[0044] Preferably, the technical solution of this embodiment is installed in the heat exchange tube 20 with an elliptical cross-section. That is to say, the orthographic projection pattern of the turbulence generator 10 along its extending direction is elliptical.

[0045] Furthermore, the outer edge 103 of the turbulence generator 10 is in close fit with the major axis and minor axis inside the heat exchange tube 20 (in the actual production process, the turbulence generator 10 is first designed according to the major axis of the inner diameter of the heat exchange tube 20, and then processed according to the major axis and minor axis inside the heat exchange tube 20, so that the cross-sectional view of its outer edge 103 is in close fit with the inside of the heat exchange tube 20, thereby making the turbulence generator 10 fill the heat exchange tube 20), strengthening the heat transfer performance of the heat exchange tube 20.

[0046] Exemplarily, on the basis of the previous embodiment, please refer to Figure 4 , the first side edge and the second side edge are located on the opposite sides of the turbulence generator 10 from the first end to the second end; the cutouts 101 provided on the first side edge and the second side edge correspond to each other in the position of the turbulence generator 10 from the first end to the second end. Thus, in this embodiment, by arranging the cutouts 101 on the opposite sides of the turbulence generator 10 along its major axis direction, stronger turbulence can be induced, enhancing the heat exchange effect; and the flow dead zone in the major axis direction can be effectively reduced, improving the flow efficiency of the fluid.

[0047] In another embodiment, the turbulence generator 10 includes a plurality of spiral segments 100, and the plurality of spiral segments 100 are connected in sequence from the first end to the second end, and the first side edge and the second side edge of each spiral segment 100 are provided with the cutouts 101.

[0048] In a preferred embodiment, define the major axis length of the turbulence generator 10 as a, and define the cut depth h of the cutout 101, then it satisfies: 0.05a < h < 0.1a. The design of the V-shaped cutout 101 in this embodiment can, compared with other shapes, enable the guide vane to fully guide the fluid to the tube wall of the heat exchange tube 20, so that the fluid can fully exchange heat with the heat exchange tube 20, achieving the effect of strengthening heat transfer, and at the same time can form a stronger eddy current effect, effectively reducing the flow resistance of the fluid in the heat exchange tube 20.

[0049] It should be noted that when the cut depth of the V-shaped cutout 101 is too small, there will not be enough fluid flowing out from the opening, resulting in a poor eddy current effect formed at the cutout 101 and a large resistance of the fluid; while when the cut depth of the V-shaped cutout 101 is too large, the area of the turbulence generator 10 body will be too small. On the one hand, it will affect the strength of the guide vane, causing the turbulence generator 10 to deform under the impact of the water pressure when the fluid flows through the turbulence generator 10, and on the other hand, it will affect the flow rate of the turbulence generator 10 guiding to the tube wall of the heat exchange tube 20, thus affecting the effect of strengthening heat transfer.

[0050] Based on this, please refer to Figure 4 , in an embodiment of the present invention, the incision depth of the V-shaped incision 101 is defined as h, and it satisfies: 0.050a < h < 0.100a. Exemplarily, the value range of the depth of the V-shaped incision 101 includes but is not limited to 0.060a, 0.070a, 0.080a, 0.090a. In this way, in this embodiment, by controlling the depth of the V-shaped incision 101 between 5% and 10% of the major axis of the heat exchange tube 20, the secondary vortex intensity of the fluid flowing through the V-shaped incision 101 can be enhanced, and at the same time, the boundary layer thickness can be effectively thinned to achieve the effect of strengthening the turbulent heat transfer in the heat exchange tube 20.

[0051] As some examples, considering that in a water heater, the major diameter of the commonly used elliptical heat exchange tube 20 is usually 20 mm to 40 mm. Taking the major diameter of the heat exchange tube 20 as 40 mm as an example, the depth of the V-shaped incision 101 can specifically be 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm or 4.0 mm.

[0052] It should be noted that when the maximum width of the V-shaped incision 101 is too small, it will also cause insufficient fluid to flow out from the incision 101, resulting in a poor vortex effect at the incision 101 and a large fluid resistance; while when the maximum width of the V-shaped incision 101 is too large, the distance between the V-shaped incision 101 and the side wall of the turbulence generator 10 will be too small, which will also cause the area of the turbulence generator 10 to be too small. On the one hand, it will affect the strength of the turbulence generator 10, causing the turbulence generator 10 to deform under the impact of the water pressure when the fluid flows through the turbulence generator 10. On the other hand, it will affect the flow rate of the turbulence generator 10 guiding to the wall of the heat exchange tube 20, thereby affecting the effect of strengthening heat transfer.

[0053] Based on this, please refer to Figure 2 , in an embodiment of the present invention, the maximum width of the V-shaped incision 101 is defined as L, and it satisfies: 0.050a < L < 0.100a. Exemplarily, the value range of the maximum width of the V-shaped incision 101 includes but is not limited to 0.060a, 0.070a, 0.080a, 0.090a. In this way, in this embodiment, by controlling the maximum width of the V-shaped incision 101 between 5% and 10% of the major axis of the heat exchange tube 20, the secondary vortex intensity of the fluid flowing through the V-shaped incision 101 can also be enhanced, and at the same time, the boundary layer thickness can be effectively thinned to achieve the effect of strengthening the turbulent heat transfer in the heat exchange tube 20.

[0054] As some examples, considering that in a water heater, the major axis of the commonly used elliptical heat exchange tube 20 is usually 20 mm to 40 mm. Taking the major axis of the heat exchange tube 20 being 40 mm as an example, the maximum width of the V-shaped notch 101 can specifically be 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm or 4.0 mm.

[0055] The size of the thickness of the turbulence generator 10 affects the size of the fluid flow channel in the heat exchange tube 20, thereby affecting the resistance of the fluid in the heat exchange tube 20 and the strength of the structure of the turbulence generator 10. That is, if the thickness of the turbulence generator 10 is too large, the channel for the fluid to flow in the heat exchange tube 20 will be very small, and the resistance of the fluid in the heat exchange tube 20 will be large. If the thickness of the turbulence generator 10 is too small, the turbulence generator 10 will be weak in terms of structural strength and durability, and may be deformed or damaged during long-term use.

[0056] Based on this, in one embodiment, define the thickness s of the turbulence generator 10, then it satisfies: 0.005a < s < 0.050a.

[0057] With such a setting, by controlling the thickness of the turbulence generator 10 between five-thousandths and five-hundredths of the major axis length of the heat exchange tube 20, the turbulence generator 10 can have better structural strength, and the resistance of the fluid in the heat exchange tube 20 will not be too large.

[0058] As some examples, taking the major axis of the heat exchange tube 20 being 40 mm as an example, the maximum width of the V-shaped notch 101 can specifically be 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm or 4.0 mm.

[0059] In one embodiment, the turbulence generator 10 is provided with a through hole 102 along its thickness direction, and the through hole 102 is usually located in the middle of the turbulence generator 10. Thus, part of the fluid flows out from the through hole 102 of the turbulence generator 10, reducing the flow resistance of the fluid in the heat exchange tube 20, increasing the flow velocity of the fluid in the tube, and further being able to adjust the turbulence intensity and fluid flow resistance of the fluid in the core flow region in the heat exchange tube 20, thereby strengthening the heat transfer performance in the heat exchange tube 20 and reducing the fluid flow resistance.

[0060] Further, considering that the heat exchange tube 20 has a certain length, in order to enhance the heat transfer performance inside the heat exchange tube 20 throughout its entire length and reduce the resistance of fluid flow, the number of the through holes 102 is multiple, and the multiple through holes 102 are arranged at intervals from the first end to the second end. In other embodiments, the multiple through holes 102 may be arranged in other ways, such as in an array, etc., and the multiple through holes 102 are arranged at array intervals from the first end to the second end.

[0061] Based on the previous embodiment, define the aperture diameter d of the through hole 102, and define the major axis length of the turbulator 10 as a, then it satisfies: 0.010a < d < 0.500a. Exemplarily, the values of d include but are not limited to 0.011a, 0.015a, 0.020a, 0.025a, 0.030a, 0.040a, 0.050a, 0.060a, 0.070a, 0.080a, 0.090a, 0.100a, 0.200a, 0.300a, 0.400a, 0.420a or 0.480a. In this embodiment, by controlling the aperture diameter d of the through hole 102 between one percent and fifty percent of the major axis of the heat exchange tube 20, a better balance can be obtained between enhancing the heat transfer performance inside the heat exchange tube 20 and reducing the resistance of fluid flow.

[0062] Based on the foregoing embodiment, define the distance between any two adjacent through holes 102 as x, then it satisfies: 0.25a < x < 0.50a. Exemplarily, the values of x include but are not limited to 0.26a, 0.28a, 0.30a, 0.32a, 0.34a, 0.36a, 0.38a, 0.40a, 0.42a, 0.44a, 0.46a or 0.48a.

[0063] In this embodiment, by controlling the distance between any two adjacent through holes 102 between twenty-five percent and fifty percent of the major axis of the heat exchange tube 20, while the turbulator 10 has good structural strength, a better balance can also be obtained between enhancing the heat transfer performance inside the heat exchange tube 20 and reducing the resistance of fluid flow.

[0064] Since in this embodiment, the turbulator 10 is arranged in a spiral shape, the turbulator 10 has a twist ratio, and the twist ratio is usually defined as the ratio of the pitch of the spiral part to the diameter. The pitch refers to the distance that the spiral line advances along the axial direction for a complete cycle, and the diameter refers to the outer diameter of the spiral turbulator; in an ellipse, the twist ratio is usually defined as the ratio of the pitch ( Figure 2 P in Figure 4 it) to the major axis ( a in it).

[0065] Different twist ratios will affect the degree of fluid disturbance, thereby affecting the heat transfer efficiency and flow resistance. When the twist ratio is relatively large, the spiral is relatively gentle, and the flow resistance is small, but the heat transfer efficiency is low; when the twist ratio is relatively small, the spiral is relatively steep, the flow resistance is large, but the heat transfer efficiency is high.

[0066] Based on this, in a preferred embodiment, the twist ratio of the turbulence generator 10 is defined as Y, and it satisfies: 1.0 ≤ Y ≤ 5.0. Exemplarily, the twist ratio of the turbulence generator 10 can be 1.0, 1.2, 1.5, 1.8, 2.0, 2.2, 2.5, 2.8, 3.0, 3.2, 3.5, 3.8, 4.0, 4.2, 4.5, 4.8 or 5.0. Thus, the turbulence generator 10 of this embodiment can enhance turbulence and strengthen the heat transfer effect while making the flow resistance of the fluid relatively moderate.

[0067] In summary, the technical solution of the present utility model provides a turbulator 10 extending spirally. The turbulator 10 is used to be installed in the heat exchange tube 20. As the fluid flows in the heat exchange tube 20, when the fluid flows through the turbulator 10, the fluid will flow along the flow channel of the turbulator 10, and the fluid flow form becomes a swirling flow; at the same time, part of the fluid flows out from the porous structure of the turbulator 10, reducing the flow resistance of the fluid in the heat exchange tube 20 and increasing the flow velocity of the fluid in the tube; in addition, the fluid flows out from the cut 101 at the edge of the turbulator 10, forming a secondary eddy current at the cut 101, thinning the temperature boundary layer of the side wall of the heat exchange tube 20, achieving the effect of strengthening heat transfer; at the same time, the fluid flowing out from the cut 101 also plays a role in reducing the flow resistance of the fluid in the heat exchange tube 20. While thinning the temperature boundary layer of the side wall of the heat exchange tube 20, by increasing the fluid velocity of the side wall of the heat exchange tube 20, it scours the possible scale formation, inhibits the formation of scale in the heat exchange tube 20, and extends the service life and maintenance cycle of the elliptical heat transfer tube.

[0068] The present utility model also proposes a heat exchanger 1, which includes a heat exchange tube 20 and a turbulator 10. The specific structure of the turbulator 10 refers to the above embodiment. Since this heat exchanger 1 adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0069] In this embodiment, the heat exchanger 1 can have one heat exchange tube 20 or multiple heat exchange tubes 20. The multiple heat exchange tubes 20 can be arranged in parallel or in series, and at least one heat exchange tube 20 is installed with a turbulator 10.

[0070] In one embodiment, the turbulence generator 10 can be fixedly connected to the tube wall of the heat exchange tube 20 by welding. Of course, in other embodiments, the turbulence generator 10 is also connected to the tube wall of the heat exchange tube 20 by interference fit.

[0071] The present utility model also provides a water heater, which includes a heat exchanger 1. The specific structure of the heat exchanger 1 refers to the above embodiments. Since this water heater adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0072] In this embodiment, the water heater is usually a gas water heater. The water heater may further include a housing, an inner shell, a burner, and a heat exchanger 1. The burner and the heat exchanger 1 are disposed inside the inner shell to form a combustion chamber. The inner shell is disposed inside 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 to the heat exchanger 1 and exchanges heat with the water in the heat exchange tube 20 of the heat exchanger 1 to heat the water flowing through the heat exchange tube 20.

[0073] 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 under the technical concept of the present utility model by using the content of the specification and drawings 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 turbulator has opposite first and second ends, and the turbulator extends spirally from the first end to the second end, and the turbulator is provided with a notch at its outer edge.

2. The turbulence generator according to claim 1, characterized in that The turbulator is arranged in a long strip shape, and the outer edge of the turbulator includes a first side edge and a second side edge arranged opposite to each other. The first side edge is provided with the notch, and / or the second side edge is provided with the notch.

3. The turbulence generator according to claim 2, characterized in that, The orthographic projection pattern of the turbulator along its extending direction is elliptical.

4. The turbulence generator according to claim 3, characterized in that, The first side edge and the second side edge are located on opposite sides of the turbulator from the first end to the second end; the notches provided on the first side edge and the second side edge correspond to each other in the position of the turbulator from the first end to the second end.

5. The turbulence generator according to claim 4, characterized in that, The turbulator includes a plurality of spiral segments, and the plurality of spiral segments are sequentially connected from the first end to the second end. The first side edge and the second side edge of each spiral segment are both provided with the notch.

6. The turbulator according to claim 3, wherein, Define the major axis length of the turbulator as a; Define the notch depth h of the notch, and it satisfies: 0.050a < h < 0.100a; and / or, define the thickness s of the turbulator, and it satisfies: 0.005a < s < 0.050a.

7. The turbulence generator according to claim 3, characterized in that The turbulator is provided with through holes along its thickness direction, and the number of the through holes is multiple, and the multiple through holes are arranged at intervals from the first end to the second end.

8. The turbulence generator according to claim 7, wherein, Define the major axis length of the turbulator as a; Define the distance between any two adjacent through holes as x, and it satisfies: 0.250a < x < 0.500a; and / or, define the aperture d of the through hole, and it satisfies: 0.010a < d < 0.500a.

9. The turbulence generator according to any one of claims 1 to 8, characterized in that, Define the twist ratio of the turbulator as Y, and it satisfies: 1.00 ≤ Y ≤ 5.

00.

10. The turbulence generator according to claim 9, characterized in that, The orthographic projection shape of the notch along the length direction of the turbulator is V-shaped, triangular, rectangular, trapezoidal or semi-circular.

11. A heat exchanger, characterized in that, Comprising: A heat exchange tube; The turbulator according to any one of claims 1 to 10, provided in the heat exchange tube.

12. A water heater, characterized in that, Comprising the heat exchanger according to claim 11.

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