Heat exchange fin and heat exchanger

Abstract

The utility model discloses a heat exchange fin and a heat exchanger, and relates to the technical field of heat exchange. The heat exchange fin comprises a base plate, the base plate is provided with a plurality of heat exchange pipe holes used for installing heat exchange pipes, the heat exchange pipe holes are arranged in two rows in parallel, and the first row of heat exchange pipe holes are located below the second row of heat exchange pipe holes. A groove is formed in the portion, between every two adjacent heat exchange tube holes in the first row, of the base plate, and the grooves extend towards the second row. And turbulent flow structures are arranged on the two opposite sides of the groove of the base plate and used for guiding smoke to the smoke back sides of the first row of heat exchange pipe holes. According to the technical scheme, the heat exchange efficiency of the heat exchanger can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a heat exchange fin and a heat exchanger. Background Art

[0002] Water heaters are household appliances commonly used in people's daily lives. During use, the hot water output by the water heater is output through a user terminal (such as a faucet or shower) for user use.

[0003] The heat exchanger is an important component of the water heater. The structural design of the heat exchanger fins directly affects the thermal efficiency and flue gas emission performance of the water heater.

[0004] The stainless steel heat exchanger in the related art adopts double rows of heat exchange tubes. Due to the low thermal conductivity of stainless steel, the surface temperature distribution of the heat exchange fins is prone to unevenness, resulting in low heat exchange efficiency. Utility Model Content

[0005] The main purpose of the utility model is to provide a heat exchange fin, aiming to improve the heat exchange efficiency of a stainless steel heat exchanger.

[0006] To achieve the above-mentioned object, the heat exchange fin proposed in the present invention includes a base plate, wherein the base plate is provided with a plurality of heat exchange tube holes for installing heat exchange tubes, wherein the plurality of heat exchange tube holes are arranged in parallel in two rows, wherein the heat exchange tube holes in the first row are located below the heat exchange tube holes in the second row;

[0007] The substrate is provided with a groove between two adjacent heat exchange tube holes in the first row, and the groove extends toward the second row to guide the flue gas to the second row;

[0008] The substrate is provided with flow-disturbing structures on opposite sides of the groove, so as to guide the smoke to the smoke-removing side of the first row of heat exchange tube holes.

[0009] In one embodiment of the present application, in the direction of flue gas flow, the top of the groove is higher than the top of the heat exchange tube holes in the first row.

[0010] In one embodiment of the present application, the top of the groove is higher than the bottom of the heat exchange tube holes in the second row.

[0011] In one embodiment of the present application, the spoiler structure and the groove are spaced apart.

[0012] In one embodiment of the present application, the flow-disturbing structure is located between the groove and the adjacent heat exchange tube holes of the first row;

[0013] The flow-disturbing structure is located between two adjacent heat exchange tube holes in the upper and lower rows;

[0014] The spoiler structure is a flanging hole.

[0015] In one embodiment of the present application, a smoke baffle is provided on the upper edge of the substrate between two adjacent heat exchange tube holes in the second row, and the smoke baffle is concavely arranged toward the first row.

[0016] In one embodiment of the present application, the plurality of heat exchange tube holes in the first row are arranged opposite to the plurality of heat exchange tube holes in the second row;

[0017] The smoke baffles are arranged in a one-to-one correspondence with the grooves;

[0018] The smoke baffle is arranged in a concave arc shape.

[0019] In one embodiment of the present application, a material reduction hole is further provided on the substrate, and the material reduction hole is located between two adjacent heat exchange tube holes in the second row;

[0020] And / or, two lateral ends of the base plate are provided with smoke-blocking flanges, and the smoke-blocking flanges extend along the direction of smoke flow.

[0021] To achieve the above objectives, the present application further provides a heat exchanger, comprising:

[0022] two end plates;

[0023] A plurality of the above-mentioned heat exchange fins, wherein the plurality of the heat exchange fins are stacked side by side between the two end plates; and

[0024] The heat exchange tubes are installed in series in the plurality of heat exchange tube holes in the first row and the second row, and are connected to the two end plates.

[0025] In one embodiment of the present application, the outermost heat exchange tube in the first row is defined as a first tube, and the inlet end of the first tube is a water inlet end;

[0026] The heat exchange tubes in the first row except the first tube are defined as a first row of tube groups, wherein the plurality of heat exchange tubes in the first row of tube groups are sequentially connected in series, and the outlet end of the first row of tube groups is a water outlet end;

[0027] The plurality of heat exchange tubes in the second row are defined as a second row tube group. The plurality of heat exchange tubes in the second row tube group are connected in series in sequence. The inlet end of the second row tube group is connected to the outlet end of the first tube, and the outlet end of the second row tube group is connected to the inlet end of the first row tube group.

[0028] In one embodiment of the present application, the outlet end of the first row of tubes is arranged adjacent to the inlet end of the first tube; the first tube and the first row of tubes are located upstream of the second row of tubes in the direction of flue gas flow.

[0029] In the heat exchange fins of the technical solution of the present invention, a plurality of heat exchange tube holes arranged in two rows in parallel are provided on the base plate, and a groove extending toward the second row is provided between two adjacent heat exchange tube holes in the first row on the lower edge of the base plate, and the groove can guide the high-temperature flue gas to the heat exchange tube holes in the second row, thereby promoting heat exchange between the high-temperature flue gas and the heat exchange tube fins in the second row; at the same time, the base plate is provided with a spoiler structure on both sides of the groove, and the spoiler structure can guide the high-temperature flue gas flowing from the groove to the back-to-smoke side of the first row of heat exchange tube holes, so as to fully contact and exchange heat with the back-to-smoke side of the first row of heat exchange tubes and the lower part of the second row of heat exchange tubes, thereby improving the heat exchange efficiency of the first row of heat exchange tubes and the second row of heat exchange tubes at the same time, and improving the overall heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 This is a structural diagram of an embodiment of the heat exchange fin of the present utility model;

[0032] Figure 2 This is a structural diagram of an embodiment of a heat exchanger of the present utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the heat exchanger of the utility model after the heat exchange fins and part of the heat exchange tubes are hidden;

[0034] Figure 4 This is a flow path diagram of an embodiment of a heat exchanger of the present invention.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, 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 number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The heat exchanger is a crucial component of a water heater, and the structural design of its fins directly impacts the overall thermal efficiency and flue gas emissions of the water heater. In related technologies, heat exchangers employ double rows of heat exchange tubes to maximize heat transfer efficiency. However, the flue gas distribution on the back-to-the-smoke side of the lower row of tubes and the upper row of tubes is relatively small, leading to uneven temperature distribution across the heat exchange fins. This results in uneven heat distribution across the tubes, which can easily lead to low heat transfer efficiency.

[0044] To this end, the present invention proposes a heat exchange fin 1, which aims to improve the heat exchange efficiency of the heat exchanger.

[0045] In the embodiment of the present utility model, Figure 1 As shown, the heat exchange fin 1 includes a base plate 11, and the base plate 11 is provided with a plurality of heat exchange tube holes 101 for installing the heat exchange tubes 2. The plurality of heat exchange tube holes 101 are arranged in parallel in two rows, wherein the first row of heat exchange tube holes 101 is located below the second row of heat exchange tube holes 101;

[0046] The base plate 11 is provided with a groove 102 between two adjacent heat exchange tube holes 101 in the first row. The groove 102 extends toward the second row to guide the flue gas to the heat exchange tube holes 101 in the second row.

[0047] The base plate 11 is provided with flow-turbulating structures 12 on two opposite sides of the groove 102 , so as to guide the smoke to the smoke-removing side of the first row of heat exchange tube holes 101 .

[0048] It can be understood that the heat exchange tubes 2 are passed through two rows of heat exchange tube holes 101 installed on multiple substrates 11 arranged side by side to form a heat exchanger. When the heat exchanger is used in gas equipment, the high-temperature flue gas generated by the combustion of the gas equipment flows to the gap between the two adjacent substrates 11 and the gap between the two adjacent heat exchange tubes 2, thereby heating the water in the heat exchange tubes 2.

[0049] Multiple heat exchange tube holes 101 are arranged in two parallel rows, with the first row of heat exchange tube holes 101 located below the second row of heat exchange tube holes 101. It is understood that the arrangement direction of the first row of heat exchange tube holes 101 is perpendicular to the direction of flue gas flow, and the arrangement direction of the second row of heat exchange tube holes 101 is also perpendicular to the direction of flue gas flow. When the high-temperature flue gas flows in, a portion of it first contacts the heat exchange tubes 2 in the first row of heat exchange tube holes 101 for heat exchange, and the other portion flows through the gaps between two adjacent heat exchange tube holes 101 in the first row to the second row of heat exchange tube holes 101 for heat exchange.

[0050] In this embodiment, a groove 102 is provided between two adjacent heat exchange tube holes 101 in the first row of the substrate 11, and the groove 102 extends toward the second row. This serves to guide the high-temperature flue gas to the second row of heat exchange tubes 2 for heat exchange. As will be appreciated, the groove 102 is hollow. Therefore, when the high-temperature flue gas flows to the groove 102, it does not exchange heat with the substrate 11. This ensures that the temperature of the flue gas flowing through the groove 102 to the second row remains high, thereby improving the heating efficiency of the second row of heat exchange tubes 2. Furthermore, the substrate 11 is provided with a flow-disrupting structure 12 on opposite sides of the groove 102. This flow-disrupting structure 12 can disrupt the flue gas flow, allowing the high-temperature flue gas to flow more efficiently toward the back-to-the-smoke area of ​​the first row of heat exchange tubes 2 and the area below the second row of heat exchange tubes 2, promoting heat exchange on the back-to-the-smoke side of the first row of heat exchange tubes 2 and improving heat exchange efficiency.

[0051] In practical applications, the shape and structure of the groove 102 can be determined according to actual conditions, and can be, for example, a strip groove, a triangular groove, a circular groove, or a groove structure of some other shape. The groove 102 extends toward the second row. It is understandable that the groove 102 can extend to a position between the first row and the second row, or the groove 102 can also extend to the position where the second row is located.

[0052] In practical applications, the specific structure of the flow-disrupting structure 12 can be determined based on actual conditions, such as a rib structure, a flanged hole structure, a convex hull structure, or some other structure. The shape of the flow-disrupting structure 12 can be determined based on actual conditions, such as a circular, square, V-shaped, U-shaped, or some other shape. As long as it can guide the high-temperature flue gas in the groove 102 toward the first row of heat exchange tube holes 101, it will be sufficient. During molding and manufacturing, the groove 102 can be formed by mold forming or stamping.

[0053] In actual applications, the number of heat exchange tube holes 101 in the first row and the number of heat exchange tube holes 101 in the second row can be the same or different. The heat exchange tube holes 101 can be circular, elliptical, flat, or other shapes. In this embodiment, considering that elliptical and flat heat exchange tubes are prone to local high temperatures and vaporization noise, circular holes are selected as the heat exchange tube holes 101 as an example, and the corresponding heat exchange tubes 2 are circular tubes. This avoids local high temperatures caused by heat accumulation at the fire end, prevents water vaporization, and reduces vaporization noise.

[0054] Optionally, the diameter of the heat exchange tube hole 101 can be selected between 13 mm and 18 mm, for example, the diameter of the heat exchange tube hole 101 is 13 mm, 13.5 mm, 13.8 mm, 14 mm, 14.5 mm, 15 mm, 15.3 mm, 15.5 mm, 16 mm, 17 mm or 18 mm, etc.

[0055] Optionally, the heat exchange tube hole 101 is a flanging hole, which can increase the connection area between the heat exchange tube 2 and the heat exchange tube hole 101, making the installation of the heat exchange tube 2 more stable and reliable.

[0056] In summary, in the heat exchange fin 1 of the technical solution of the present invention, a plurality of heat exchange tube holes 101 arranged in parallel in two rows are provided on the substrate 11, and a groove 102 extending toward the second row is provided between two adjacent heat exchange tube holes 101 in the first row. The groove 102 can guide the high-temperature flue gas to the heat exchange tube holes 101 in the second row, thereby promoting heat exchange between the high-temperature flue gas and the heat exchange tubes 2 in the second row; at the same time, the substrate 11 is provided with a spoiler structure 12 on both sides of the groove 102, and the spoiler structure 12 can guide the high-temperature flue gas flowing from the groove 102 to the back-smoke side of the first row of heat exchange tube holes 101, so as to fully contact and exchange heat with the back-smoke side of the first row of heat exchange tubes 2 and the lower part of the second row of heat exchange tubes 2, thereby improving the heat exchange efficiency of the first row of heat exchange tubes 2 and the second row of heat exchange tubes 2 at the same time, thereby improving the overall heat exchange efficiency of the heat exchanger.

[0057] In order to further improve the heat exchange efficiency, in one embodiment of the present application, Figure 1 In the direction of flue gas flow, the top of the groove 102 is higher than the top of the first row of heat exchange tube holes 101.

[0058] As can be understood, taking the example of flue gas flowing from bottom to top, the first row of heat exchange tube holes 101 is located below the second row of heat exchange tube holes 101, and the groove 102 extends upward from the lower edge of the base plate 11, thereby guiding the high-temperature flue gas upward. In this embodiment, by setting the top of the groove 102 higher than the top of the first row of heat exchange tube holes 101, the high-temperature flue gas can be directly guided along the groove 102 to the top of the first row of heat exchange tube holes 101, which can promote contact and heat exchange between the high-temperature flue gas and the second row of heat exchange tubes 2. At the same time, the temperature distribution in the second and first rows of the base plate 11 is more uniform, thereby improving heat exchange efficiency.

[0059] Furthermore, the top of the groove 102 is higher than the bottom of the second row of heat exchange tube holes 101 .

[0060] In this arrangement, the groove 102 extends between two adjacent heat exchange tube holes 101 in the second row, so that the high-temperature flue gas can be directly guided along the groove 102 to the second row of heat exchange tube holes 101 to contact and exchange heat with the second row of heat exchange tubes 2, further improving the heat exchange efficiency between the high-temperature flue gas and the second row of heat exchange tubes 2.

[0061] In one embodiment of the present application, Figure 1 The spoiler structure 12 and the groove 102 are spaced apart.

[0062] This arrangement forms a flow channel between the spoiler structure 12 and the groove 102, allowing the flue gas to flow between the spoiler structure 12 and the groove 102. At the same time, the spoiler structure 12 can also guide the airflow toward the area between the first row of heat exchange tube holes 101 and the second row of heat exchange tube holes 102, making the temperature distribution of the heat exchange fins more uniform.

[0063] In one embodiment of the present application, Figure 1 The flow-disturbing structure 12 is located between the groove 102 and the adjacent first row of heat exchange tube holes 101 .

[0064] By arranging the spoiler structure 12 between the groove 102 and the adjacent first row of heat exchange tube holes 101, the high-temperature flue gas directed upward along the groove 102 can be spoiled by the spoiler structure 12, so that the high-temperature flue gas can flow to the back-tobacco side of the first row of heat exchange tube holes 101 to exchange heat with the back-tobacco side of the first row of heat exchange tubes 2, thereby making the peripheral temperature distribution of the first row of heat exchange tubes 2 uniform, avoiding the occurrence of local high temperature causing internal water vaporization.

[0065] Furthermore, the spoiler structure 12 is located between two adjacent heat exchange tube holes 101 in the upper and lower rows.

[0066] With such arrangement, when the high-temperature flue gas directed upward along the groove 102 flows to the turbulent flow structure 12, under the turbulent flow effect of the turbulent flow structure 12, part of the high-temperature flue gas can flow toward the back-smoke side of the first row of heat exchange tube holes 101, part of it can flow toward the first row of heat exchange tube holes 101, and part of it can flow upward to between two adjacent heat exchange tube holes 101 in the second row. As a result, the high-temperature flue gas can mix on the surface of the heat exchange fin 1, so that the temperature distribution on the surface of the heat exchange fin 1 is more uniform, avoiding local high temperature.

[0067] Optionally, the flow-disturbing structure 12 is a flanged hole. The flanged hole structure can not only block smoke and divert flow, but also increase the heat exchange area and improve heat exchange efficiency. The shape of the flanged hole can be determined according to actual conditions, and can be, for example, circular, square, triangular, strip, or other shapes. As an example, the flanged hole is a circular hole for ease of molding and manufacturing. Optionally, the diameter of the flanged hole can be selected between 2 mm and 6 mm, and the height of the flange can be selected between 1 mm and 2 mm.

[0068] In one embodiment of the present application, Figure 1 A smoke baffle 13 is provided on the upper edge of the base plate 11 between two adjacent heat exchange tube holes 101 in the second row, and the smoke baffle 13 is concavely arranged toward the first row.

[0069] In this embodiment, a smoke baffle 13 is provided on the upper edge of the base plate 11. The smoke baffle 13 is located between two adjacent heat exchange tube holes 101 in the second row. When the high-temperature flue gas flows upward to the second row, the smoke baffle 13 can block the high-temperature flue gas between the two adjacent heat exchange tube holes 101 from flowing upward, and can block the high-temperature flue gas from flowing back to the heat exchange tube holes 101 in the second row to contact and exchange heat with the second row of heat exchange tubes 2, thereby preventing the high-temperature flue gas from flowing away without heat exchange, thereby improving the thermal utilization rate of the high-temperature flue gas.

[0070] The smoke baffle 13 is concavely arranged toward the first row, so that the smoke baffle 13 can guide the high-temperature flue gas to flow back to the heat exchange tube holes 101 in the second row, further improving the heat exchange efficiency.

[0071] Optionally, the smoke baffle 13 is arranged in a concave arc shape. Compared with a shape with corners, the arc-shaped structure of such a design can better guide and disperse the airflow, making the smoke distribution more uniform.

[0072] Furthermore, if Figure 1 The plurality of heat exchange tube holes 101 in the first row are arranged opposite to the plurality of heat exchange tube holes 101 in the second row; the smoke baffles 13 and the grooves 102 are arranged in a one-to-one correspondence.

[0073] With this design, the groove 102 can extend upward to between two adjacent heat exchange tube holes 101 in the second row, thereby better guiding the high-temperature flue gas to the second row of heat exchange tube holes 101. Optionally, a groove 102 is provided between every two adjacent heat exchange tube holes 101 in the first row, thereby guiding the high-temperature flue gas to between every two adjacent heat exchange tube holes 101 in the second row, making the flue gas distribution more uniform. On this basis, the base plate 11 is provided with a smoke baffle 13 between every two adjacent heat exchange tube holes 101 in the second row, and the smoke baffle 13 is arranged in a one-to-one correspondence with the groove 102, so that the high-temperature flue gas can stay on the base plate 11 for a longer time, fully contact and exchange heat with multiple heat exchange tubes 2, and further improve the heat exchange efficiency.

[0074] In one embodiment of the present application, Figure 1 A material reduction hole 103 is further provided on the substrate 11 , and the material reduction hole 103 is located between two adjacent heat exchange tube holes 101 in the second row.

[0075] By providing the material reduction holes 103, on the one hand, the weight of the heat exchange fins 1 can be reduced, the heat storage amount can be reduced, and the water shut-off temperature rise can be reduced; on the other hand, the material reduction holes 103 can allow the high-temperature flue gas to flow between the substrates 11, enhance the turbulence, and improve the heat exchange efficiency of the heat exchanger.

[0076] Optionally, the diameter of the material reduction hole 103 may be between 2 mm and 5 mm.

[0077] In one embodiment of the present application, Figure 1 The base plate 11 is provided with smoke blocking flanges 14 at both transverse ends, and the smoke blocking flanges 14 extend along the direction of smoke flow.

[0078] In this embodiment, the smoke barrier flange 14 blocks the lateral outward flow of high-temperature smoke, preventing it from escaping through the sides without undergoing heat exchange. The smoke barrier flange 14 extends in the direction of smoke flow, both guiding the upward flow of smoke and extending the length of the side barrier to improve the heat utilization rate of the smoke.

[0079] The utility model also proposes a heat exchanger, such as Figures 1 to 4 The heat exchanger includes two end plates 3, multiple heat exchange fins 1, and heat exchange tubes 2. The specific structure of the heat exchange fins 1 refers to the above-mentioned embodiments. Since this heat exchanger adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and will not be described in detail here. The multiple heat exchange fins 1 are stacked side by side between the two end plates 3; the heat exchange tubes 2 are installed in series through the multiple heat exchange tube holes 101 in the first and second rows and connected to the two end plates 3.

[0080] In one embodiment of the present application, Figures 2 to 4, define the outermost heat exchange tube 2 in the first row as the first tube 21a, and the inlet end of the first tube 21a is the water inlet end 201; define the other heat exchange tubes 2 in the first row except the first tube 21a as the first row tube group 21b, the multiple heat exchange tubes 2 in the first row tube group 21b are connected in series in sequence, and the outlet end of the first row tube group 21b is the water outlet end 202; define the multiple heat exchange tubes 2 in the second row as the second row tube group 22, the multiple heat exchange tubes 2 in the second row tube group 22 are connected in series in sequence, the inlet end of the second row tube group 22 is connected to the outlet end of the first tube 21a, and the outlet end of the second row tube group 22 is connected to the inlet end of the first row tube group 21b.

[0081] This embodiment illustrates the flow path of the heat exchange tubes by setting the outermost first tube 21a of the first row as the water inlet pipe of the entire flow path of the heat exchanger, and the outlet end of the first row of tube group 21b outside the first tube 21a of the first row as the water outlet end 202 of the entire flow path of the heat exchanger. The outlet end of the first tube 21a is connected to the inlet end of the second row of tube group 22, and the outlet end of the second row of tube group 22 is connected to the inlet end of the first row of tube group 21b outside the first tube 21a of the first row. Therefore, after water enters from the water inlet end 201 of the first tube 21a, it flows through the first tube 21a, the second row of tube group 22, and the first row of tube group 21b in sequence for heat exchange, and then flows out from the water outlet end 202. That is, water enters from the side of the first row, flows through the second row, and then flows into the first row and flows out.

[0082] This design, on the one hand, takes into account the higher temperature of the areas on both sides of the first row of heat exchange fins 1, and places the first tube 21a at the outermost position of the first row. Compared with the method of arranging other heat exchange tubes at this position, the water inlet temperature of the first tube 21a is the lowest, which can reduce the possibility of water vaporization in the tube; on the other hand, water enters from the first row, is heated, and then flows to the second row of tube groups 22, so that the temperature difference between the second row of tube groups 22 and the flue gas is reduced, which can improve the generation of condensed water.

[0083] In order to further improve the carburization noise, such as Figure 3 In some embodiments, a turbulent spring 61 and a tie 62 may be provided in the heat exchange tube 2 to turbulently flow the water in the tube so that the high-temperature water near the inner wall of the tube is fully mixed with the water in the center of the tube, thereby avoiding the vaporization of the high-temperature water near the inner wall of the tube.

[0084] Furthermore, the outlet end of the first tube group 21b is adjacent to the inlet end of the first tube 21a. The first tube 21a and the first tube group 21b are located upstream of the second tube group 22 in the direction of flue gas flow.

[0085] As you can understand, the heat exchange tubes located at the outlet end of the first row of tubes 21b serve as the outlet pipes for the entire heat exchanger flow path. When the water heater is shut off, the heat exchange tubes on both sides of the first row of heat exchange fins 1 and located there transfer more heat to the water within the tubes, causing the water temperature to rise even more within the heat exchange tubes 2 on both sides of the first row, resulting in a higher temperature rise during the water shut-off. Therefore, this embodiment places the outlet end of the first row of tubes 21b adjacent to the inlet end of the first tube 21a. This allows the outlet pipes for the entire heat exchanger flow path to avoid the areas on both sides of the first row of heat exchange fins 1, where the heat storage capacity is relatively high, effectively reducing the temperature rise during the water shut-off.

[0086] In some embodiments, the outlet end of the first row of tube groups 21 b may be located near the middle of the first row.

[0087] As an example, take 10 heat exchange tubes as an example, the first row and the second row each have 5 heat exchange tubes, such as Figure 4 As shown, the first row consists of tubes 1, 10, 9, 8, and 7 arranged in parallel and spaced apart. The second row consists of tubes 2, 3, 4, 5, and 6 arranged in parallel and spaced apart. Tube 1 is the water inlet of the flow path, and tube 10 is the water outlet of the flow path. Adjacent tubes are connected by water caps 5 provided on end plates 3 to form water pockets, so that tubes 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 are connected in series. During operation, water enters tube 1, passes through tubes 2, 3, 4, 5, 6, 7, 8, 9, and 10 in sequence, and then flows out of tube 10.

[0088] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat exchange fin, characterized in that: The heat exchange tube holes are arranged in parallel in two rows, wherein the heat exchange tube holes in the first row are located below the heat exchange tube holes in the second row. The substrate is provided with a groove between two adjacent heat exchange tube holes in the first row, and the groove extends toward the second row to guide the flue gas to the second row; The substrate is provided with flow-disturbing structures on opposite sides of the groove, so as to guide the smoke to the smoke-removing side of the first row of heat exchange tube holes.

2. The heat exchange fin according to claim 1, characterized in that: In the flue gas flow direction, the top of the groove is higher than the top of the heat exchange tube holes in the first row.

3. The heat exchange fin according to claim 2, characterized in that: The top of the groove is higher than the bottom of the heat exchange tube holes in the second row.

4. The heat exchange fin according to any one of claims 1 to 3, characterized in that: The spoiler structure is spaced apart from the groove.

5. The heat exchange fin according to claim 4, characterized in that: The flow-disturbing structure is located between the groove and the adjacent heat exchange tube holes of the first row; The flow-disturbing structure is located between two adjacent heat exchange tube holes in the upper and lower rows; the flow-disturbing structure is a flanged hole.

6. The heat exchange fin according to any one of claims 1 to 3, characterized in that: A smoke baffle is provided on the upper edge of the base plate between two adjacent heat exchange tube holes in the second row, and the smoke baffle is concavely arranged toward the first row.

7. The heat exchange fin according to claim 6, characterized in that: The plurality of heat exchange tube holes in the first row are arranged opposite to the plurality of heat exchange tube holes in the second row; The smoke baffles are arranged in a one-to-one correspondence with the grooves; and the smoke baffles are arranged in a concave arc shape.

8. The heat exchange fin according to any one of claims 1 to 3, characterized in that: The substrate is further provided with a material reduction hole, the material reduction hole being located between two adjacent heat exchange tube holes in the second row; And / or, two lateral ends of the base plate are provided with smoke-blocking flanges, and the smoke-blocking flanges extend along the direction of smoke flow.

9. A heat exchanger, characterized in that: include: two end plates; A plurality of heat exchange fins according to any one of claims 1 to 8, wherein the plurality of heat exchange fins are stacked side by side between the two end plates; as well as The heat exchange tubes are installed in series in the plurality of heat exchange tube holes in the first row and the second row, and are connected to the two end plates.

10. The heat exchanger according to claim 9, characterized in that The outermost heat exchange tube in the first row is defined as a first tube, and the inlet end of the first tube is a water inlet end; The heat exchange tubes in the first row except the first tube are defined as a first row of tube groups, wherein the plurality of heat exchange tubes in the first row of tube groups are sequentially connected in series, and the outlet end of the first row of tube groups is a water outlet end; The plurality of heat exchange tubes in the second row are defined as a second row tube group. The plurality of heat exchange tubes in the second row tube group are connected in series in sequence. The inlet end of the second row tube group is connected to the outlet end of the first tube, and the outlet end of the second row tube group is connected to the inlet end of the first row tube group.

11. The heat exchanger according to claim 10, wherein The outlet end of the first tube row is adjacent to the inlet end of the first tube, and the first tube and the first tube row are located upstream of the second tube row in the flue gas flow direction.

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