Heat exchange fin, heat exchanger and gas water heater

Abstract

This utility model belongs to the field of heat exchange technology, and specifically discloses a heat exchange plate, a heat exchanger, and a gas water heater. The heat exchange plate includes a substrate, a first flange, and a first protrusion. The substrate has a first side and a second side opposite to each other along its thickness direction. A plurality of heat exchange tube holes are spaced apart on the substrate. The first flange is disposed on the substrate and folded towards the first side. Along the overall flow direction of the flue gas, the first flange is located downstream of the heat exchange tube holes. The first protrusion is disposed on the substrate and protrudes towards the second side. The first protrusion is spaced between the heat exchange tube holes and the first flange. By making the edge of the first flange and the top of the first protrusion offset along the thickness direction of the substrate, the high-temperature flue gas needs to flow at a deflection along the thickness direction of the substrate to flow from the top of the first protrusion to the edge of the first flange. Therefore, the high-temperature flue gas has sufficient contact with the surface of the first protrusion, the surface of the first flange, and the surface of the substrate between the first protrusion and the first flange.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a heat exchange plate, a heat exchanger and a gas water heater. Background Technology

[0002] In gas water heaters, a heat exchanger is typically used to receive the high-temperature flue gas generated by the combustion of gas within the heater, allowing the flue gas to heat the water passing through the heat exchanger. Specifically, a heat exchanger usually includes multiple heat exchange fins arranged in sequence and heat exchange tubes connected to these fins. The process involves first exchanging heat between the high-temperature flue gas and the heat exchange fins and tubes, and then exchanging heat between the heat exchange fins and tubes, and finally between the heat exchange tubes and the water inside the tubes, thus heating the water within the tubes.

[0003] Among the various heat exchangers, the degree of contact between the high-temperature flue gas and the surface of the heat exchanger significantly affects the heat exchange efficiency as the high-temperature flue gas flows downstream along the gaps between adjacent heat exchange fins. Current heat exchangers suffer from insufficient contact between the high-temperature flue gas and the surface of the heat exchange fins, resulting in low heat exchange efficiency. Utility Model Content

[0004] One of the technical problems solved by this utility model is to provide a heat exchange plate that can effectively solve the problem of insufficient surface contact between high-temperature flue gas and the heat exchange plate.

[0005] The second technical problem solved by this utility model is to provide a heat exchanger that can improve its heat exchange efficiency by using the aforementioned heat exchange plates whose surfaces are easy to contact more fully with high-temperature flue gas.

[0006] The third technical problem solved by this utility model is to provide a gas water heater that, by using the aforementioned heat exchanger with high heat exchange efficiency, can improve the overall heat exchange efficiency of the gas water heater and reduce energy waste.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A heat exchange plate, comprising:

[0009] A substrate having a first side and a second side opposite to each other along its own thickness direction, and a plurality of heat exchange tube holes spaced apart on the substrate;

[0010] The first flange is disposed on the substrate and folded toward the first side. Along the overall flow direction of the flue gas, the first flange is located on the downstream side of the heat exchange tube hole.

[0011] The first protrusion is disposed on the substrate and protrudes toward the second side, and the first protrusion is spaced between the heat exchange tube hole and the first flange.

[0012] The heat exchanger of this invention has the following advantages compared with the prior art:

[0013] By setting a first flange on the downstream side of the heat exchange tube hole, the high-temperature flue gas can be blocked to a certain extent, allowing the high-temperature flue gas to stay near the heat exchange tube hole for a longer time.

[0014] Furthermore, by folding the first flange toward the first side and making the first bulge protrude toward the second side, the edge of the first flange and the top of the first bulge can be offset along the thickness direction of the substrate. As a result, when the high-temperature flue gas flows under the action of buoyancy, it needs to flow at an offset along the thickness direction of the substrate to flow from the top of the first bulge to the edge of the first flange, so as to flow out between the two adjacent heat exchange plates. Therefore, the high-temperature flue gas has sufficient contact with the surface of the first bulge, the surface of the first flange, and the surface of the substrate between the first bulge and the first flange.

[0015] As for the heat exchange plate where the edge of the first flange and the top of the first convex hull are located on the same side of the substrate along its own thickness direction, since the high-temperature flue gas does not need to deflect and flow along the thickness direction of the substrate, it can flow from the top of the first convex hull to the edge of the first flange. Therefore, the high-temperature flue gas has insufficient contact with the surface of the first convex hull, the surface of the first flange, and the surface of the substrate between the first convex hull and the first flange.

[0016] Therefore, the heat exchange plate provided by this utility model has the advantage of enabling high-temperature flue gas to contact the surface of the heat exchange plate more fully compared to heat exchange plates where the edge of the first flange and the top of the first convex bulge are located on the same side of the substrate along its own thickness direction.

[0017] In one embodiment, the first convex hull and the first flange have a minimum spacing h, 0.8mm ≤ h < 1.5mm.

[0018] In one embodiment, the first flange is provided directly downstream between any two adjacent heat exchange tube holes along the overall flow direction of the flue gas.

[0019] In one embodiment, the first flange includes two segments respectively adjacent to two adjacent heat exchange tube holes, the segments being at least partially concentric with the edges of the adjacent heat exchange tube holes.

[0020] In one embodiment, each of the sub-segments is provided with a first convex bulge between itself and the heat exchange tube hole adjacent to it.

[0021] In one embodiment, each of the first protrusions extends at equal intervals along the same direction as the edge of the adjacent heat exchange tube hole, or each of the first protrusions extends at equal intervals along the same direction as the adjacent first flange.

[0022] In one embodiment, the heat exchange plate further includes a second protrusion, which is disposed on the substrate and protrudes toward the second side, and the second protrusion is located between two adjacent heat exchange tube holes;

[0023] For any one of the second convex humps, the second convex hump is spaced apart from the adjacent first convex hump, or, along the arrangement direction of the plurality of heat exchange tube holes, the two opposite ends of the second convex hump extend to connect with the two adjacent first convex humps.

[0024] In one embodiment, the heat exchange plate further includes a third protrusion, which is disposed on the substrate and protrudes toward the second side. Each heat exchange tube hole is provided with a plurality of third protrusions at intervals along the upstream side of the overall flow direction of the flue gas, and the plurality of third protrusions are arranged at intervals along the edge of the heat exchange tube hole; and / or,

[0025] The heat exchange plate further includes a fourth protrusion, which is disposed on the substrate and protrudes toward the second side. The fourth protrusion is adjacent to the edge of the substrate along the arrangement direction of the plurality of heat exchange tube holes, and the fourth protrusion is located downstream of the heat exchange tube holes along the overall flow direction of the flue gas.

[0026] In one embodiment, the heat exchange plate further includes two second flanges, which are disposed on the substrate and folded toward the first side. Along the arrangement direction of the plurality of heat exchange tube holes, the two second flanges are respectively disposed on two opposite sides of the substrate; and / or,

[0027] The heat exchange plate also includes a plurality of third flanges, which are disposed on the substrate and folded toward the first side, and each of the third flanges is disposed along the edge of each of the heat exchange tube holes.

[0028] The second technical problem mentioned above is solved by the following technical solution:

[0029] A heat exchanger includes a heat exchange tube and a plurality of heat exchange plates as described in the foregoing technical solutions. The plurality of heat exchange plates are arranged sequentially along the thickness direction of the substrate itself, and the first side of all the heat exchange plates faces the same direction. The heat exchange tube passes through the heat exchange tube hole of the heat exchange plate.

[0030] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0031] Since the heat exchange plates described in the aforementioned technical solution enable high-temperature flue gas to come into more full contact with the surface of the heat exchange plates, the heat exchange efficiency of the heat exchanger can be improved.

[0032] The third technical problem mentioned above is solved by the following technical solution:

[0033] A gas water heater includes an inlet pipe, an outlet pipe, and a heat exchanger as described in the foregoing technical solution, wherein the inlet pipe and the outlet pipe are respectively connected to the two ends of the heat exchanger.

[0034] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0035] Because the heat exchanger described in the aforementioned technical solution has high heat exchange efficiency, the overall heat exchange efficiency of the gas water heater is also high, which can reduce energy waste. Attached Figure Description

[0036] Figure 1 This is a partial cross-sectional view of the structure when two heat exchange fins are arranged at intervals, as provided in related technologies.

[0037] Figure 2 This is a partial structural cross-sectional view of the heat exchanger and mold provided in the related technology during the manufacturing process;

[0038] Figure 3 A three-dimensional structural diagram of the first type of heat exchange plate provided in this embodiment of the present invention at an angle;

[0039] Figure 4 A three-dimensional structural schematic diagram of the first type of heat exchanger provided in an embodiment of this utility model from another angle;

[0040] Figure 5 A front view schematic diagram of the first type of heat exchange plate provided in the embodiment of this utility model;

[0041] Figure 6 for Figure 5 Sectional view along the middle AA direction;

[0042] Figure 7 This is a partial cross-sectional view of the structure of two heat exchange fins arranged at intervals according to an embodiment of the present invention;

[0043] Figure 8 A partial cross-sectional view of the heat exchanger and mold during the manufacturing process, as provided in the embodiments of this utility model;

[0044] Figure 9 This is a three-dimensional structural diagram of the second type of heat exchange plate provided in an embodiment of the present utility model at an angle;

[0045] Figure 10 A three-dimensional structural diagram of the second type of heat exchanger provided in an embodiment of this utility model from another angle;

[0046] Figure 11 A three-dimensional structural diagram of the third type of heat exchange plate provided in this embodiment of the present invention at an angle;

[0047] Figure 12 A three-dimensional structural schematic diagram of the third type of heat exchanger provided in this embodiment of the present utility model from another angle;

[0048] Figure 13 A three-dimensional structural diagram of the fourth type of heat exchange plate provided in this embodiment of the present invention at an angle;

[0049] Figure 14 A three-dimensional structural diagram of the fourth type of heat exchanger provided in this embodiment of the present utility model from another angle;

[0050] Figure 15 A simplified structural diagram of a gas water heater provided for an embodiment of this utility model;

[0051] Label Explanation:

[0052] Figure 1 and Figure 2 middle:

[0053] 1' Heat exchanger fin; 11' Substrate; 12' Flanged edge; 13' Convex bulge;

[0054] 32', Second mold.

[0055] Figures 3 to 15 middle:

[0056] 100. Heat exchanger;

[0057] 1. Heat exchanger plate; 11. Substrate; 111. First side; 112. Second side; 113. Heat exchanger tube hole; 12. First flange; 121. Sub-segment; 13. First bulge; 14. Second flange; 15. Third flange; 16. Second bulge; 17. Third bulge; 18. Fourth bulge;

[0058] 2. Heat exchanger tubes;

[0059] 31. First mold; 32. Second mold;

[0060] 200. Water inlet pipe;

[0061] 300. Water outlet pipe. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] like Figures 3 to 5 As shown, this embodiment proposes a heat exchange plate 1, including a substrate 11, a first flange 12, and a first protrusion 13. The substrate 11 has a first side 111 and a second side 112 opposite to each other along its own thickness direction S1. A plurality of heat exchange tube holes 113 are spaced apart on the substrate 11. The first flange 12 is disposed on the substrate 11 and folded toward the first side 111. Along the overall flue gas flow direction S2, the first flange 12 is located downstream of the heat exchange tube holes 113. The first protrusion 13 is disposed on the substrate 11 and protrudes toward the second side 112. The first protrusion 13 is spaced between the heat exchange tube holes 113 and the first flange 12.

[0067] By setting a first flange 12 on the downstream side of the heat exchange tube hole 113, the high-temperature flue gas can be blocked to a certain extent, so that the high-temperature flue gas stays in the vicinity of the heat exchange tube hole 113 for a longer time.

[0068] Please combine Figure 6 and Figure 7 As shown, further, by folding the first flange 12 toward the first side 111, the first convex 13 protrudes toward the second side 112, allowing the edge of the first flange 12 and the top of the first convex 13 to be offset along the thickness direction S1 of the substrate 11. Consequently, when the high-temperature flue gas flows under the action of buoyancy, it needs to flow at an offset along the thickness direction S1 of the substrate 11 to flow from the top of the first convex 13 to the edge of the first flange 12, so as to flow out between two adjacent heat exchange plates 1. Therefore, the high-temperature flue gas has sufficient contact with the surface of the first convex 13, the surface of the first flange 12, and the surface of the substrate 11 between the first convex 13 and the first flange 12. Figure 7 The dashed lines and arrows exemplify a flow path of high-temperature flue gas between two adjacent heat exchange plates 1.

[0069] Please compare. Figure 1 As shown, in the prior art heat exchange plate 1' where the edge of the first flange 12' and the top of the first convex 13' are located on the same side of the substrate 11' along its own thickness direction S1, the high-temperature flue gas can flow from the top of the first convex 13' to the edge of the first flange 12' without needing to deflect along the thickness direction S1 of the substrate 11'. Therefore, the contact between the high-temperature flue gas and the surface of the first convex 13', the surface of the first flange 12', and the surface of the substrate 11' between the first convex 13' and the first flange 12' is relatively insufficient. Figure 1 The image illustrates, through dashed lines and arrows, an exemplary flow path of high-temperature flue gas flowing between two adjacent heat exchange fins 1' in the prior art.

[0070] Therefore, the heat exchange plate 1 provided by this utility model has the advantage of enabling high-temperature flue gas to contact the surface of the heat exchange plate 1 more fully than the heat exchange plate 1' in the prior art where the edge of the first flange 12' and the top of the first convex 13' are located on the same side of the substrate 11' along its own thickness direction S1.

[0071] It should be noted that the "overall flue gas flow direction S2" mentioned above specifically refers to the general direction in which the flue gas flows from one side of the heat exchange plate 1 to the other side. During the process of the flue gas flowing from the heat exchange plate 1, there may be local situations where the flue gas flow direction forms an angle with the overall flue gas flow direction S2.

[0072] In addition, under normal circumstances, the overall flow direction S2 of the flue gas is perpendicular to the thickness direction S1 of the substrate 11 itself, and forms an angle with the arrangement direction of the plurality of heat exchange tube holes 113.

[0073] Please combine Figure 8 As shown, when manufacturing the heat exchange plate 1, a flat plate is usually stamped to form a substrate 11 and a first protrusion 13 and a first flange 12 provided on the substrate 11. Specifically, the mold usually includes at least a protrusion mold (not shown in the figure) and two first molds 31 and two second molds 32 respectively for abutting against two opposite sides of the plate. The two first molds 31 are spaced apart, and a protrusion mold is provided between the two first molds 31. The two second molds 32 are spaced apart, and the gap between the two second molds 32 is used to avoid the structure of the protrusion.

[0074] Please compare. Figure 2 As shown, in the related art, when producing a heat exchange plate 1' with the flange 12' and the convex 13' located on the same side, since a second mold 32' is provided between the flange 12' and the convex 13', the minimum distance between the flange 12' and the convex 13' is limited by the second mold 32'. In other words, the minimum distance h' between the flange 12' and the convex 13' is equal to the width dimension d2' of the second mold 32'.

[0075] In the heat exchange plate 1 provided in this embodiment, since the first flange 12 and the first convex 13 are respectively provided on opposite sides, the width d1 of the first mold 31 is equal to the sum of the minimum distance h between the first flange 12 and the first convex 13 and the thickness b1 of the first convex 13, and the width d2 of the second mold 32 is equal to the sum of the minimum distance h between the first flange 12 and the first convex 13 and the thickness b2 of the first flange 12. In other words, the minimum distance h between the first flange 12 and the first convex 13 satisfies: h = d1 - b1 = d2 - b2.

[0076] In order to ensure that the strength of the mold meets the usage requirements, the mold usually has different minimum size restrictions when the mold is made of different materials. Therefore, when the mold of the same material is used in this embodiment and the related technology, that is, when the minimum value of the width dimension d2' of the second mold 32' in the related technology is equal to the minimum value of the width dimension d2 of the second mold 32 in this embodiment, the minimum width values ​​of the first mold 31 and the second mold 32 are the same. Since the heat exchange plate 1 is usually of equal thickness, the thickness b1 of the first convex 13 is usually approximately equal to the thickness b2 of the first flange 12. Thus, when the minimum distance h between the first flange 12 and the first convex 13 of the heat exchange plate 1 provided in this embodiment and the minimum distance h' between the flange 12' and the convex 13' of the heat exchange plate 1' in the related technology both reach the minimum limit value, it can be achieved that: h = h' - b1.

[0077] In other words, when using molds of the same material in this embodiment and related technologies, the minimum distance h between the first flange 12 and the first convex 13 of the heat exchange plate 1 in this embodiment can be smaller than the minimum distance h' between the flange 12' and the convex 13' of the heat exchange plate 1' in related technologies. As a result, the structure of the heat exchange plate 1 in this embodiment is more compact, and a smaller size design can be achieved while ensuring heat exchange efficiency. This can reduce the installation space occupied by the heat exchange plate 1 on the one hand, and save the material cost of the heat exchange plate 1 on the other hand.

[0078] In related technologies, the minimum size of molds made of commonly used materials is usually greater than or equal to 1.5 mm. If a higher quality mold is used, the minimum size of the mold can be further reduced. Thus, in this embodiment, the minimum distance h between the first protrusion 13 and the first flange 12 can be smaller than 1.5 mm. However, considering that if the minimum distance h is too small, the surface area of ​​the heat exchange plate 1 will be too small, which will lead to a significant decrease in the heat exchange efficiency of the heat exchange plate 1, the minimum distance h cannot be too small. Based on this, in one embodiment, the minimum distance h between the first protrusion 13 and the first flange 12 can satisfy: 0.8 mm ≤ h < 1.5 mm. For example, the minimum distance h can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, 1.1 mm, 1.15 mm, 1.2 mm, 1.25 mm, 1.3 mm, 1.35 mm, 1.4 mm, or 1.45 mm, etc.

[0079] Please see again. Figure 3 and Figure 4 In one embodiment, a first flange 12 is provided directly downstream of any two adjacent heat exchange tube holes 113 along the overall flow direction S2 of the flue gas. This flange 12 can block the high-temperature flue gas flowing out from the gap between any two adjacent heat exchange tube holes 113, thereby prolonging the time that the high-temperature flue gas is near the heat exchange tube holes 113 and allowing the high-temperature flue gas to have a more thorough heat exchange with the heat exchange plate 1.

[0080] In one embodiment, the first flange 12 includes two segments 121 respectively adjacent to two adjacent heat exchange tube holes 113. The segments 121 are at least partially concentrically arranged with the edge of the adjacent heat exchange tube hole 113, so that the high-temperature flue gas can be guided to flow along the edge of the heat exchange tube hole 113 through the segments 121, so as to further improve the contact between the high-temperature flue gas and the surface of part of the heat exchange plate 1 near the heat exchange tube hole 113, and further improve the heat exchange efficiency of the heat exchange plate 1.

[0081] In one embodiment, each segment 121 is provided with a first protrusion 13 between itself and the heat exchange tube hole 113 adjacent to it. On the one hand, the surface area of ​​the heat exchange plate 1 between the segment 121 and the heat exchange tube hole 113 can be increased by providing the first protrusion 13, so as to further improve the effective contact area between the heat exchange plate 1 and the high temperature flue gas. On the other hand, the first protrusion 13 can play a certain blocking role against the high temperature flue gas, so as to further prolong the time that the high temperature flue gas stays near the heat exchange tube hole 113.

[0082] In one embodiment, two adjacent first protrusions 13 are spaced apart so that the high-temperature flue gas can continue to flow downstream through the gap between the two first protrusions 13, so that the high-temperature flue gas can leave the heat exchange plate 1 in time after completing a sufficient heat exchange, and new high-temperature flue gas can then carry out the next heat exchange with the heat exchange plate 1.

[0083] In one embodiment, each first protrusion 13 extends at equal intervals along the same direction as the edge of the adjacent heat exchange tube hole 113, thereby guiding the nearby high-temperature flue gas to flow along the edge of the heat exchange tube hole 113, so as to further improve the contact between the high-temperature flue gas and the surface of part of the heat exchange plate 1 near the heat exchange tube hole 113, and further improve the heat exchange efficiency of the heat exchange plate 1.

[0084] like Figure 9 and Figure 10 As shown, in one embodiment, each first protrusion 13 and the adjacent first flange 12 extend at equal intervals in the same direction. This makes the blocking effect of the first protrusion 13 and the first flange 12 on the high-temperature flue gas more similar, which is beneficial to enhance the blocking effect of the first flange 12 on the flue gas by the assistance of the first protrusion 13. On the other hand, it makes the space between the first protrusion 13 and the first flange 12 smaller, thereby making the space between the first protrusion 13 and the heat exchange tube hole 113 larger, which makes it easier to extend the time for a larger amount of high-temperature flue gas to flow through the outer periphery of the heat exchange tube hole 113.

[0085] In one embodiment, the heat exchange plate 1 further includes a second protrusion 16, which may be a circular, strip-shaped, elliptical, or irregularly shaped protrusion structure. The second protrusion 16 is disposed on the substrate 11 and protrudes toward the second side 112. The second protrusion 16 is located between two adjacent heat exchange tube holes 113, so that the high-temperature flue gas can be diverted through the second protrusion 16, so that the high-temperature flue gas is divided into two streams by the second protrusion 16 and flows toward the outer periphery of the two adjacent heat exchange tube holes 113 during the downstream process, thereby making the high-temperature flue gas near the heat exchange tube holes 113.

[0086] In one embodiment, the second bulge 16 is positioned upstream of the heat exchange tube hole 113 along the overall flue gas flow direction S2, so that the second bulge 16 can divert the high-temperature flue gas earlier.

[0087] In other embodiments, the center of the second bulge 16 may also be located on the line connecting the centers of two adjacent heat exchange tube holes 113, or the second bulge 16 may also be offset towards the downstream side of the heat exchange tube hole 113 along the overall flue gas flow direction S2.

[0088] like Figure 11 and Figure 12 As shown, in one embodiment, the second convex 16 is spaced apart from the adjacent first convex 13, thereby enabling the heat exchange plate 1 to have a larger total surface area by including more spaced convex convex 1s.

[0089] like Figure 13 and Figure 14 As shown, in one embodiment, the two opposite ends of the second convex 16 along the arrangement direction of the plurality of heat exchange tube holes 113 can extend to connect with two adjacent first convex 13, so that the second convex 16 and the two adjacent first convex 13 are connected to form an integral convex structure, thereby simplifying the shape of the heat exchange plate 1 and reducing the manufacturing difficulty of the heat exchange plate 1.

[0090] For the heat exchange plate 1 including a plurality of second protrusions 16, for example, all the second protrusions 16 may be spaced apart from two adjacent first protrusions 13, or all the second protrusions 16 may be connected to two adjacent first protrusions 13, or, among the plurality of second protrusions 16, some of the second protrusions 16 are spaced apart from two adjacent first protrusions 13, and the remaining second protrusions 16 are connected to two adjacent first protrusions 13.

[0091] In addition, in one embodiment, a second protrusion 16 is provided between any two adjacent heat exchange tube holes 113, or a second protrusion 16 is provided between some of the two adjacent heat exchange tube holes 113, and no second protrusion 16 is provided between the remaining two adjacent heat exchange tube holes 113.

[0092] Please see again. Figure 3 and Figure 4In one embodiment, the heat exchange plate 1 further includes a third protrusion 17, which is disposed on the substrate 11 and protrudes toward the second side 112. Each heat exchange tube hole 113 is provided with a plurality of third protrusions 17 at intervals along the upstream side of the overall flue gas flow direction S2, and the plurality of third protrusions 17 are arranged at intervals along the edge of the heat exchange tube hole 113. On the one hand, the third protrusions 17 can block and turbulent the flue gas upstream of the heat exchange tube hole 113, thereby slowing down the flow rate of the high-temperature flue gas and increasing the time that the high-temperature flue gas stays at the outer periphery of the heat exchange tube hole 113, thereby further improving the heat exchange efficiency between the outer periphery of the heat exchange tube hole 113 and the flue gas. On the other hand, the third protrusions 17 can increase the surface area of ​​the heat exchange plate 1, thereby increasing the heat exchange area between the heat exchange plate 1 and the flue gas, thereby further improving the overall heat exchange efficiency between the heat exchange plate 1 and the flue gas.

[0093] In one embodiment, the heat exchange plate 1 further includes a fourth protrusion 18, which is disposed on the substrate 11 and protrudes toward the second side 112. The fourth protrusion 18 is adjacent to the edge of the substrate 11 along the arrangement direction of the plurality of heat exchange tube holes 113, and the fourth protrusion 18 is located downstream of the heat exchange tube holes 113 along the overall flow direction S2 of the flue gas, so that the high-temperature flue gas can be blocked from the downstream side by the fourth protrusion 18, thereby increasing the time that the high-temperature flue gas stays at the outer periphery of the heat exchange tube holes 113, and further improving the heat exchange efficiency between the outer periphery of the heat exchange tube holes 113 and the flue gas.

[0094] In one embodiment, the heat exchange plate 1 further includes two second flanges 14. The second flanges 14 are disposed on the substrate 11 and folded toward the first side 111. Along the arrangement direction of the plurality of heat exchange tube holes 113, the two second flanges 14 are respectively disposed on two opposite sides of the substrate 11. This allows the second flanges 14 to prevent high-temperature flue gas from leaving the heat exchange plate 1 from both sides of the substrate 11 along the arrangement direction of the plurality of heat exchange tube holes 113, thereby further improving the degree of contact between the high-temperature flue gas and the surface of the heat exchange plate 1.

[0095] In one embodiment, the heat exchange plate 1 further includes a plurality of third flanges 15. The third flanges 15 are disposed on the substrate 11 and folded toward the first side 111. Each third flange 15 is disposed along the edge of each heat exchange tube hole 113. The third flanges 15 can limit the heat exchange tube 2 passing through the heat exchange tube hole 113, so that the relative position of the heat exchange tube 2 and the heat exchange plate 1 is more easily kept stable.

[0096] In one embodiment, the heat exchange plate 1 may include both a second flange 14 and a third flange 15, so as to make the heat exchange efficiency of the heat exchange plate 1 higher and make the relative position of the heat exchange tube 2 and the heat exchange plate 1 easier to maintain stability.

[0097] Furthermore, by folding all the flanges toward the first side 111 and making all the protrusions toward the second side 112, the edges of all the flanges and the tops of all the protrusions are offset along the thickness direction S1 of the substrate 11. This allows for more thorough contact between the high-temperature flue gas and the surfaces of all the flanges, protrusions, and the substrate 11 as it flows downstream. On the other hand, it also allows for a smaller distance between the flanges and the nearest protrusions. This ensures the heat exchange efficiency of the heat exchange plate 1 while reducing its size, thereby minimizing the installation space occupied by the heat exchange plate 1 and saving on the material cost of the heat exchange plate 1.

[0098] like Figure 15 As shown, this embodiment also proposes a heat exchanger 100, which includes heat exchange tubes 2 and multiple heat exchange plates 1 as described in the aforementioned technical solutions. The multiple heat exchange plates 1 are arranged sequentially along the thickness direction S1 of the substrate 11 itself, and the first side 111 of all the heat exchange plates 1 faces the same direction. The heat exchange tubes 2 pass through the heat exchange tube holes 113 of the heat exchange plates 1. Since the heat exchange plates 1 described in the aforementioned technical solutions can make the high-temperature flue gas contact the surface of the heat exchange plates 1 more fully, the heat exchange efficiency of the heat exchanger 100 can be higher.

[0099] Furthermore, since the heat exchange fins 1 can be designed to be smaller, the overall size of the heat exchanger 100 can also be made smaller.

[0100] Please continue reading Figure 15 This embodiment also proposes a gas water heater (not labeled in the figure), which includes an inlet pipe 200, an outlet pipe 300, and a heat exchanger 100 as described in the aforementioned technical solution. The inlet pipe 200 and the outlet pipe 300 are respectively connected to the two ends of the heat exchange pipe 2. Since the heat exchanger 100 described in the aforementioned technical solution has a high heat exchange efficiency, the overall heat exchange efficiency of the gas water heater is also high, which can reduce energy waste.

[0101] Furthermore, since the heat exchanger 100 can be designed to be smaller, it is beneficial to enable the gas water heater to be designed to be smaller.

[0102] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0103] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat exchange fin, characterized by, include: A substrate (11) has a first side (111) and a second side (112) opposite to each other along its own thickness direction, and a plurality of heat exchange tube holes (113) are spaced apart on the substrate (11). The first flange (12) is disposed on the substrate (11) and folded toward the first side (111). Along the overall flow direction of the flue gas, the first flange (12) is located downstream of the heat exchange tube hole (113). The first convex bulge (13) is disposed on the substrate (11) and protrudes toward the second side (112). The first convex bulge (13) is spaced between the heat exchange tube hole (113) and the first flange (12).

2. The heat exchange sheet according to claim 1, wherein The first convex hull (13) and the first flange (12) have a minimum distance h, 0.8mm≤h<1.5mm.

3. The heat exchange sheet according to claim 1, wherein Along the overall flow direction of the flue gas, the first flange (12) is provided directly downstream between any two adjacent heat exchange tube holes (113).

4. The heat exchange sheet according to claim 3, wherein The first flange (12) includes two segments (121) respectively adjacent to two adjacent heat exchange tube holes (113), and the segments (121) are at least partially concentric with the edges of the adjacent heat exchange tube holes (113).

5. The heat exchange sheet according to claim 4, wherein Each of the sub-segments (121) and its adjacent heat exchange tube hole (113) is provided with a first convex bulge (13).

6. The heat exchange sheet according to any one of claims 1 to 5, wherein Each of the first protrusions (13) extends at equal intervals along the edge of the adjacent heat exchange tube hole (113) in the same direction, or each of the first protrusions (13) extends at equal intervals along the adjacent first flange (12) in the same direction.

7. The heat exchange sheet according to any one of claims 1 to 5, wherein The heat exchange plate (1) further includes a second protrusion (16), which is disposed on the substrate (11) and protrudes toward the second side (112). The second protrusion (16) is located between two adjacent heat exchange tube holes (113). For any one of the second convex humps (16), the second convex humps (16) are spaced apart from the adjacent first convex humps (13), or, along the arrangement direction of the plurality of heat exchange tube holes (113), the two opposite ends of the second convex humps (16) extend to connect with the two adjacent first convex humps (13).

8. The heat exchange sheet according to any one of claims 1 to 5, wherein The heat exchange plate (1) further includes a third protrusion (17), which is disposed on the substrate (11) and protrudes toward the second side (112). Each heat exchange tube hole (113) is provided with a plurality of third protrusions (17) at intervals along the upstream side of the overall flue gas flow direction, and the plurality of third protrusions (17) are arranged at intervals along the edge of the heat exchange tube hole (113); and / or, The heat exchange plate (1) further includes a fourth protrusion (18), which is disposed on the substrate (11) and protrudes toward the second side (112). The fourth protrusion (18) is adjacent to the edge of the substrate (11) along the arrangement direction of the plurality of heat exchange tube holes (113), and the fourth protrusion (18) is located downstream of the heat exchange tube holes (113) along the overall flow direction of the flue gas.

9. The heat exchange sheet according to any one of claims 1 to 5, wherein The heat exchange plate (1) further includes two second flanges (14), which are disposed on the substrate (11) and folded toward the first side (111). Along the arrangement direction of the plurality of heat exchange tube holes (113), the two second flanges (14) are respectively disposed on two opposite sides of the substrate (11); and / or, The heat exchange plate (1) also includes a plurality of third flanges (15), which are disposed on the substrate (11) and folded toward the first side (111), and each of the third flanges (15) is disposed along the edge of each of the heat exchange tube holes (113).

10. A heat exchanger, characterized by The heat exchanger (100) includes a heat exchange tube (2) and a plurality of heat exchange plates (1) as described in any one of claims 1-9. The plurality of heat exchange plates (1) are arranged sequentially along the thickness direction of the substrate (11) itself, and the first side (111) of all the heat exchange plates (1) faces the same direction. The heat exchange tube (2) passes through the heat exchange tube hole (113) of the heat exchange plate (1).

11. A gas water heater, characterised by, The gas water heater includes an inlet pipe (200), an outlet pipe (300), and a heat exchanger (100) as described in claim 10, wherein the inlet pipe (200) and the outlet pipe (300) are respectively connected to the two ends of the heat exchange pipe (2).

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