Heat exchange fin, heat exchanger and gas water heating equipment

Abstract

The utility model discloses a heat exchange fin, heat exchanger and gas hot water equipment, the heat exchange fin includes: a substrate having a first side surface and a second side surface opposite to each other, the substrate is provided with a plurality of heat exchange tube holes arranged at intervals along a first direction; the first flow guide structures are arranged between every two adjacent heat exchange tube holes, each first flow guide structure comprises a flow guide convex hull arranged on the first side face in a protruding mode, an opening is formed in the side, facing the smoke inlet direction, of each flow guide convex hull, and the openings are used for guiding airflow to flow from the first side face to the second side face; wherein the first direction intersects with the smoke inlet direction. According to the technical scheme, turbulent flow of smoke among the fins can be improved, the heat exchange effect is enhanced, and then the heat exchange efficiency of the heat exchanger is improved.

Description

Technical Field

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

[0002] The heat exchanger is the core component of the gas water heater. It can transfer the heat from the high-temperature flue gas generated by the burner of the water heater to the water in the heat exchange tube, thereby heating the cold water in the heat exchange tube to meet the user's hot water needs. Among them, the finned tube heat exchanger is the most common heat exchange equipment.

[0003] Fin-tube heat exchangers generally include a heat exchange tube and a plurality of fins sleeved on the outer periphery of the heat exchange tube. The plurality of fins are arranged along the length direction of the heat exchange tube, and a gap is formed between two adjacent fins. In the prior art, high-temperature flue gas passes through the fin gap along the incoming flow direction, sweeps over the fin surface, and realizes heat transfer from the high-temperature flue gas to the heat exchange fin. However, in the heat exchange process of a traditional heat exchanger, the flue gas usually only flows in a single fin gap, sweeps over the adjacent fin surface, and cannot flow through the gaps on both sides of the fin, which limits the turbulence of the flue gas between the fins to enhance the heat exchange to a certain extent, thereby affecting the heat exchange efficiency of the heat exchanger. Utility Model Content

[0004] The main purpose of the utility model is to provide a heat exchange fin, which aims to improve the turbulence of flue gas between the fins to enhance the heat exchange effect, thereby improving the heat exchange efficiency of the heat exchanger.

[0005] In order to achieve the above-mentioned purpose, the heat exchange fin proposed by the utility model comprises:

[0006] A substrate having a first side surface and a second side surface opposite to each other, wherein the substrate is provided with a plurality of heat exchange tube holes arranged at intervals along a first direction; and

[0007] A first flow guiding structure is provided between two adjacent heat exchange tube holes, the first flow guiding structure comprises a flow guiding convex package convexly provided on the first side surface, the flow guiding convex package is provided with an opening on a side facing the smoke inlet direction, and the opening is used to guide the airflow from the first side surface to the second side surface;

[0008] Wherein, the first direction intersects with the smoke entering direction.

[0009] In one of the embodiments, the first flow-guiding structure comprises a plurality of the flow-guiding convex humps, the plurality of the flow-guiding convex humps are arranged in a plurality of rows in the smoke inlet direction, and the flow-guiding convex humps in two adjacent rows are arranged in a staggered row.

[0010] In one embodiment, in the smoke inlet direction, the number of the guide convex hulls located in the upstream row is less than the number of the guide convex hulls located in the adjacent downstream row; and / or,

[0011] The substrate has a first side edge facing the smoke inlet direction, and among the plurality of guide convex humps of the first guide structure, the guide convex hump located most upstream is arranged on the first side edge.

[0012] In one of the embodiments, a concave cavity is formed on the side of the guide convex bulge facing the second side surface, and the concave cavity has a guide surface facing the opening, and the guide surface is used to guide the airflow in the concave cavity to flow toward the second side surface.

[0013] In one of the embodiments, the flow guide convex hump is configured to be tapered toward one side of the convexity.

[0014] In one embodiment, the guide bulge has an end wall opposite to and spaced from the first side surface, and a side wall connecting an edge of the end wall to the first side surface, and the side wall is arranged in an arc shape arched toward a side away from the opening.

[0015] In one of the embodiments, the heat exchange fin also includes a second flow guide structure protruding from the first side surface, the second flow guide structure is located between two adjacent heat exchange tube holes, and the second flow guide structure is located downstream of the first flow guide structure in the smoke inlet direction, and the second flow guide structure is used to guide the airflow toward the heat exchange tube holes on both sides.

[0016] In one of the embodiments, the second flow guiding structure includes two flow guiding flanges arranged at intervals along the first direction, the interval between the two flow guiding flanges is arranged opposite to the first flow guiding structure, the two flow guiding flanges are arranged at an angle, and each of the flow guiding flanges is inclined toward the adjacent heat exchange tube hole relative to the smoke inlet direction.

[0017] In one embodiment, the substrate has a second side edge facing away from the smoke inlet direction;

[0018] The second side edge is provided with a wake folded edge folded toward the first side, the wake folded edge is arranged opposite to the first flow guide structure, and the wake folded edge is arched toward the side close to the first flow guide structure; and / or, the second side edge is provided with a smoke exhaust notch, and the smoke exhaust notch is arranged opposite to the heat exchange tube hole.

[0019] In one embodiment, two opposite sides of the substrate along the first direction are respectively provided with side folded edges folded toward the first side surface.

[0020] The utility model also provides a heat exchanger, comprising:

[0021] The heat exchange fin as described above; and

[0022] A heat exchange tube is inserted into the heat exchange tube hole of the heat exchange fin.

[0023] The utility model also provides a gas water heater, comprising the heat exchanger as described above.

[0024] The technical solution of the utility model is to provide a first flow-guiding structure between two adjacent heat-exchange tube holes of the heat-exchange fin, wherein the first flow-guiding structure includes a plurality of flow-guiding convex hulls convexly arranged on the first side of the substrate, and the flow-guiding convex hulls have openings facing the direction of smoke inlet. In this way, when the smoke flows along the first side of the substrate, the flow-guiding hulls can guide the smoke, and the flow-guiding hulls can also play the role of turbulence and change the flow velocity of the smoke; and a part of the smoke can flow from the opening of the flow-guiding hulls to the second side of the substrate, so that the direction of the smoke changes, and flows from the gap on one side of the heat-exchange fin to the gap on the other side, so that the smoke flows in series between the gaps on both sides of the heat-exchange fins, thereby enhancing the degree of turbulence flow of the smoke between the fins, fully destroying the thermal boundary layer, achieving a better heat exchange enhancement effect, and thus improving the heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a schematic structural diagram of an embodiment of a heat exchanger of the utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the partial structure of the heat exchanger;

[0028] Figure 3 It is a structural schematic diagram of an embodiment of the heat exchange fin of the utility model.

[0029] Description of Figure Numbers:

[0030]

[0031]

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] The heat exchanger is the core component of the gas water heater. It can transfer the heat from the high-temperature flue gas generated by the burner of the water heater to the water in the heat exchange tube, thereby heating the cold water in the heat exchange tube to meet the user's hot water needs. Among them, the finned tube heat exchanger is the most common heat exchange equipment.

[0037] The fin-tube heat exchanger generally includes a heat exchange tube and a plurality of fins sleeved on the outer periphery of the heat exchange tube. The plurality of fins are arranged along the length direction of the heat exchange tube, and a gap is formed between two adjacent fins. In the prior art, the high-temperature flue gas passes through the fin gap along the incoming flow direction, sweeps over the fin surface, and realizes the heat transfer of the high-temperature flue gas to the heat exchange fin. However, in the heat exchange process of the traditional heat exchanger, the flue gas usually only flows in a single fin gap, sweeps over the adjacent fin surface, and cannot flow in the gaps on both sides of the fin, which limits the turbulence of the flue gas between the fins to enhance the heat exchange, thereby affecting the heat exchange efficiency of the heat exchanger. For the efficiency guarantee of the fin-tube heat exchanger based on metal materials, its heat exchange thermal resistance mainly comes from the heat exchange capacity of the fin and the flue gas side. When the area of ​​the heat exchange fin on the flue gas side is constant, the turbulence intensity brought by the turbulence on the flue gas side is increased, so that the forced heat exchange effect is enhanced, which can reduce the heat exchange thermal resistance on the flue gas side to a certain extent, and effectively improve the heat exchange efficiency on the flue gas side.

[0038] Based on this, the utility model proposes a heat exchange fin 10. By optimizing the design of the guide structure of the heat exchange fin 10, when it is applied to the heat exchanger 100, during the heat exchange process, the flue gas can flow through the surface of the heat exchange fin 10 and enter the gap on the other side, so that the flue gas can flow between the gaps on both sides of the heat exchange fin 10 to enhance the turbulence, fully destroy the thermal boundary layer, enhance heat transfer, and improve the heat exchange efficiency.

[0039] Please refer to Figures 1 to 3 In one embodiment of the utility model, the heat exchange fin 10 includes a substrate 11 and a first flow guiding structure. The substrate 11 has a first side surface 111 and a second side surface 112 opposite to each other, and the substrate 11 is provided with a plurality of heat exchange tube holes 113 arranged at intervals along a first direction; the first flow guiding structure is provided between two adjacent heat exchange tube holes 113, and the first flow guiding structure includes a flow guiding convex bulge 12 convexly provided on the first side surface 111, and the side of the flow guiding convex bulge 12 facing the smoke inlet direction is provided with an opening 121, and the opening 121 is used to guide the airflow from the first side surface 111 to the second side surface 112; wherein, the first direction intersects with the smoke inlet direction.

[0040] Please combine Figure 1 and Figure 2, the heat exchange fin 10 can be applied to a heat exchanger 100, wherein the heat exchanger 100 may include a heat exchange tube 20 and a heat exchange fin 10. Among them, the substrate 11 is the main body of the heat exchange fin 10, and has the function of carrying various structures of the heat exchange fin 10. The substrate 11 has a first side surface 111 and a second side surface 112 opposite to each other in the thickness direction. The substrate 11 can be made of metal materials such as copper, aluminum, and stainless steel. The substrate 11 is provided with a plurality of heat exchange tube holes 113 for the heat exchange tube 20 to pass through in a side-by-side manner along a first direction (for example, the length direction of the substrate 11), and the number of heat exchange tube holes 113 on the substrate 11 is adapted to the number of heat exchange tubes 20 of the heat exchanger 100. The number of heat exchange tube holes 113 can be set to two, three, four or more according to actual needs, and is not specifically limited here. For example, the heat exchanger 100 may include three heat exchange tubes 20 arranged in a single row and spaced apart. Accordingly, the substrate 11 is provided with three heat exchange tube holes 113 arranged in a single row and spaced apart. The heat exchange tubes 20 and the heat exchange tube holes 113 are interlaced and matched one by one. In some embodiments, when a plurality of heat exchange tubes 20 are arranged in multiple rows, a plurality of heat exchange tube holes 113 are also arranged in multiple rows, for example, two rows, three rows or more. In this embodiment, the heat exchange fin 10 having a plurality of heat exchange tube holes 113 arranged in a single row is mainly taken as an example. In addition, the shape of the heat exchange tube hole 113 is adapted to the outer peripheral contour of the heat exchange tube 20. For example, the heat exchange tube hole 113 may be a circular hole, an elliptical hole, a square hole or other special-shaped holes, etc. Optionally, the heat exchange tube hole 113 may be a circular hole or an elliptical hole to adapt to the conventional heat exchange tube 20 structure for easy installation and matching.

[0041] like Figure 1 and Figure 2 As shown, when applied to a heat exchanger 100, a plurality of heat exchange fins 10 are arranged along the length direction of the heat exchange tube 20, wherein the first side surface 111 of one heat exchange fin 10 is opposite to and spaced from the second side surface 112 of another adjacent heat exchange fin 10, so that a gap for flue gas to pass through is formed between two adjacent heat exchange fins 10. When applied to a gas water heater, the heat exchanger 100 is arranged above the burner, and the flue gas generated by the burner flows from bottom to top to the heat exchanger 100, and the direction of the smoke inlet is also from bottom to top. The high-temperature flue gas passes through the fin gap along the incoming flow direction, sweeps across the fin surface, and realizes the heat transfer from the high-temperature flue gas to the heat exchange fin 10, so as to realize the heating of the water in the heat exchange tube 20.

[0042] The first side surface 111 of the substrate 11 is provided with a first guide structure between two adjacent heat exchange tube holes 113, and the first guide structure serves as the main guide part for the incoming flue gas between the heat exchange tubes 20. The first guide structure includes a plurality of guide convex humps 12, through which the flue gas can be guided to a preset direction and a preset position, and the guide speed can also be controlled by designing the guide humps 12. For example, the height of the guide humps 12 can be set according to the size of the flue gas resistance. When it is necessary to increase the flue gas resistance so that the flue gas has a stronger turbulence effect on the fins, it is necessary to ensure that the height of the guide humps 12 is as high as possible. Generally, the maximum height of the guide humps 12 is less than the spacing between the two heat exchange fins 10, and the height design of the guide humps 12 must also be combined with the processing difficulty of the process. Among them, the number of guide humps 12 can be designed to be one, two, three or more according to actual needs. The shape of the guide convex hull 12 can be designed to be a horseshoe, trapezoid, square, triangle, hemispherical or other special-shaped structures according to actual needs, and is not specifically limited here. The guide convex hull 12 is provided with an opening 121 on one side facing the smoke inlet direction (for example, the bottom side of the guide convex hull 12) in order to form a channel through which smoke can penetrate and to guide the smoke to the other side of the heat exchange fin 10, thereby enhancing the turbulence effect on the smoke, so that the smoke can flow through the gaps on both sides of the heat exchange fin 10.

[0043] The technical solution of the utility model is to provide a first flow guiding structure between two adjacent heat exchange tube holes 113 of the heat exchange fin 10, and the first flow guiding structure includes a plurality of flow guiding convex hulls 12 convexly arranged on the first side 111 of the substrate 11, and the flow guiding convex hulls 12 have openings 121 facing the direction of smoke inlet. In this way, when the smoke flows along the first side 111 of the substrate 11, the flow guiding hulls 12 can guide the smoke, and the flow guiding hulls 12 can also play the role of turbulence and change the flow velocity of the smoke; and a part of the smoke can flow from the opening 121 of the flow guiding hulls 12 to the second side 112 of the substrate 11, so that the direction of the smoke changes, and flows from the gap on one side of the heat exchange fin 10 to the gap on the other side, so that the smoke flows in series between the gaps on both sides of the heat exchange fin 10, thereby enhancing the degree of turbulence flow of the smoke between the fins, fully destroying the thermal boundary layer, achieving a better heat exchange enhancement effect, and thus improving the heat exchange efficiency of the heat exchanger 100.

[0044] like Figure 3 As shown, in one embodiment, the first guide structure includes a plurality of guide convex bumps 12, and the plurality of guide convex bumps 12 are arranged in a plurality of rows in the smoke inlet direction, and the guide convex bumps 12 in two adjacent rows are arranged in a staggered row.

[0045] In this embodiment, the first flow guiding structure includes a plurality of flow guiding bumps 12, which can further improve the flow guiding and flow disturbing effects on the flue gas. The plurality of flow guiding bumps 12 are arranged in multiple rows in the flue gas inlet direction, and two adjacent rows of flow guiding bumps 12 are arranged in a staggered pattern. The so-called staggered arrangement means that the upper and lower rows of flow guiding bumps 12 are arranged in a staggered manner. In this way, the overlapping area of the projections of two adjacent rows of flow guiding bumps 12 in the flue gas inlet direction is minimized, so as to ensure that the flue gas can come into full contact with each row of flow guiding bumps 12 for heat exchange. Among them, the number of flow guiding bumps 12 can be three, four, five or more. The plurality of flow guiding bumps 12 can be arranged in two rows, three rows or more in the flue gas inlet direction.

[0046] Optionally, as Figure 3 shown, in one embodiment, in the flue gas inlet direction, the number of the flow guiding bumps 12 in the upstream row is less than the number of the flow guiding bumps 12 in the adjacent downstream row. In this way, the plurality of flow guiding bumps 12 of the first flow guiding structure are arranged as a whole to form a structure similar to an inverted pyramid. During the upward flow of the flue gas, under the guidance of the first flow guiding structure, the flue gas can gradually flow towards the heat exchange tube holes 113 on both sides, so that the flue gas can come into full contact with the heat exchange tubes 20 passing through the heat exchange tube holes 113 for heat exchange. For example, the first flow guiding structure includes three flow guiding bumps 12, and the three flow guiding bumps 12 are arranged in two rows in the flue gas inlet direction. The first row (i.e., the upstream row) is provided with one flow guiding bump 12, and the second row (i.e., the downstream row) is provided with two flow guiding bumps 12. Moreover, the interval part between the two flow guiding bumps 12 in the second row is arranged opposite to the flow guiding bump 12 in the first row, so that the first flow guiding structure as a whole presents a structure similar to an inverted "pin" character. Another example is that the first flow guiding structure includes five flow guiding bumps 12, and the five flow guiding bumps 12 are arranged in two rows in the flue gas inlet direction. The first row (i.e., the upstream row) is provided with two flow guiding bumps 12, and the second row (i.e., the downstream row) is provided with three flow guiding bumps 12. Moreover, the interval part between any two adjacent flow guiding bumps 12 in the second row is arranged opposite to the flow guiding bump 12 in the first row.

[0047] Furthermore, in one embodiment, the substrate 11 has a first side edge facing the flue gas inlet direction, and among the plurality of flow guiding bumps 12 of the first flow guiding structure, the flow guiding bump 12 located at the most upstream is arranged on the first side edge.

[0048] In this embodiment, taking the direction of smoke inlet from bottom to top as an example, the first side edge of the substrate 11, that is, the lower side edge of the substrate 11, when the smoke flows to the first side edge of the substrate 11, it will contact the most upstream guide convex hull 12 (for example, the first row of guide convex hulls 12), and the incoming smoke will be guided once through the most upstream guide convex hull 12, and a part of the smoke will change its flow direction at the opening 121 of the most upstream guide convex hull 12 and flow to the other side of the substrate 11, and the smoke on both sides of the most upstream guide convex hull 12 will continue to flow upward, and will be guided twice when flowing through the downstream guide convex hull 12 (for example, the second row of guide convex hulls 12), and a part of the smoke will change its flow direction at the opening 121 of the downstream guide convex hull 12 and flow to the other side of the substrate 11. Thereby, the degree of turbulent flow of smoke between the fins can be further enhanced, the thermal boundary layer can be fully destroyed, a better heat exchange enhancement effect can be achieved, and the heat exchange efficiency of the heat exchanger 100 can be further improved. The number of the flow-guiding convex bumps 12 located at the most upstream may be one or more. Optionally, the first side edge of the substrate 11 is arranged in a wave shape, the first side edge has a wave crest section surrounding the periphery of each of the heat exchange tube holes 113, and a wave trough section connected between two adjacent wave crest sections, and the flow-guiding convex bumps 12 are arranged in the wave trough section.

[0049] like Figure 2 As shown, in one embodiment, a concave cavity is formed on the side of the guide convex bulge 12 facing the second side 112, and the concave cavity has a guide surface facing the opening 121, and the guide surface is used to guide the airflow in the concave cavity to flow toward the second side 112. In this way, when the smoke from the first side 111 of the substrate 11 flows into the concave cavity through the opening 121 of the guide convex bulge 12, the smoke contacts the guide surface and can flow to the second side 112 under the guidance of the guide surface. In order to achieve a better guiding effect, optionally, the guide surface is a gradually expanding conical surface from the bottom of the concave cavity toward the second side 112. In practical applications, the guide convex bulge 12 can be stretched and formed from the second side 112 of the substrate 11 toward the first side 111 through a stretching process, and then a concave cavity can be formed on the back of the guide convex bulge 12, and the molding process is simple.

[0050] Furthermore, if Figure 2As shown, the guide convex bulge 12 is gradually set toward the side of the bulge. That is, in the thickness direction of the substrate 11, the side wall 123 of the guide convex bulge 12 has a certain taper, so that it can avoid rupture at the connection during the stretching process to ensure the structural integrity of the guide convex bulge 12 and ensure the processing quality. In addition, it can be understood that when multiple heat exchange fins 10 are arranged side by side, the guide convex bulge 12 of one heat exchange fin 10 is arranged corresponding to the concave cavity on the back of the guide convex bulge 12 of another heat exchange fin 10. By making the guide convex bulge 12 have a certain taper in the direction of the bulge, it can be ensured that when the convex bulge height is greater than the fin gap, a part of the guide convex bulge 12 of one heat exchange fin 10 can be inserted into the concave cavity on the back of the guide convex bulge 12 of the other heat exchange fin 10, so that the guide convex bulges 12 on the two heat exchange fins 10 can form a certain overlap without causing interference, thereby reducing the processing accuracy requirements for the guide convex bulge 12, reducing the processing difficulty and cost.

[0051] like Figure 2 and Figure 3 As shown, in one embodiment, the guide bulge 12 has an end wall 122 opposite to and spaced from the first side surface 111, and a side wall 123 connecting the edge of the end wall 122 to the first side surface 111, and the side wall 123 is arranged in an arc shape that is arched toward the side away from the opening 121.

[0052] In this embodiment, the guide convex bulge 12 is formed by the arc-shaped side wall 123 and the fan-shaped end wall 122, so that the guide convex bulge 12 is a horseshoe-shaped structure or a nearly horseshoe-shaped structure, with a regular shape and easy processing. And the guide convex bulge 12 is a horseshoe-shaped structure or a nearly horseshoe-shaped structure. When the smoke passes through the opening 121 of the guide convex bulge 12, it can be guided to the other side of the heat exchange fin 10 by the horseshoe-shaped structure closed at the tail of the guide convex bulge 12, forming a series flow of smoke between the two sides of the fin, thereby enhancing the turbulence effect on the smoke. Optionally, the side wall 123 has a taper that tapers toward the side close to the end wall 122, so that the guide convex bulge 12 is set to taper toward the convex side.

[0053] In one embodiment, the heat exchange fin 10 also includes a second flow guide structure protruding from the first side surface 111, the second flow guide structure is located between two adjacent heat exchange tube holes 113, and the second flow guide structure is located downstream of the first flow guide structure in the smoke inlet direction. The second flow guide structure is used to guide the airflow to flow toward the heat exchange tube holes 113 on both sides.

[0054] In this embodiment, after the flue gas is guided by the first guide structure, a part of the flue gas flows to the other side of the heat exchange fin 10 through the opening 121 of the first guide structure, and the other part of the flue gas continues to flow upward to the second guide structure, and can be guided again by the second guide structure, and the flue gas is guided to the heat exchange tube holes 113 on both sides through the second guide structure, so as to fully contact and exchange heat with the heat exchange tubes 20 on both sides, and further improve the heat exchange efficiency. Among them, the specific structure of the second guide structure can be determined according to actual conditions, such as a flange structure, a convex hull structure, a guide groove structure or other special-shaped structures, etc., and its specific structure is not limited here, as long as it can guide the flue gas to the heat exchange tube holes 113 on both sides.

[0055] like Figure 3 As shown, in one embodiment, the second flow guiding structure includes two flow guiding flanges 13 arranged at intervals along the first direction, the interval between the two flow guiding flanges 13 is arranged opposite to the first flow guiding structure, the two flow guiding flanges 13 are arranged at an angle, and each of the flow guiding flanges 13 is inclined toward the adjacent heat exchange tube hole 113 relative to the smoke inlet direction.

[0056] In this embodiment, the two guide flanges 13 of the second guide structure are arranged in an inverted "eight" shape. The two guide flanges 13 are located downstream of the guide convex 12 and are respectively located at the tail of two adjacent heat exchange tube holes 113. In this way, the flue gas on both sides of the heat exchange tube hole 113 that is not disturbed by the guide convex 12 can be respectively guided to the heat exchange tube hole 113 to weaken the flue gas turbulence caused by the heat exchange tube hole 113, strengthen the contact between the incoming flue gas and the heat exchange fin 10 area at the tail of the heat exchange tube 20, strengthen the heat exchange, and further improve the heat exchange efficiency.

[0057] It can be understood that, for two adjacent heat exchange tube holes 113, the two flow-guiding flanges 13 between the two adjacent heat exchange tube holes 113 are arranged in an inverted "eight" shape. For a single heat exchange tube hole 113, when flow-guiding flanges 13 are respectively provided on both sides of the tail of the single heat exchange tube hole 113, the two flow-guiding flanges 13 corresponding to the heat exchange tube hole 113 are arranged in an "eight" shape. In addition, the two flow-guiding flanges 13 between two adjacent heat exchange tube holes 113 can be symmetrically arranged or asymmetrically arranged; similarly, the two flow-guiding flanges 13 located on both sides of a single heat exchange tube hole 113 can be symmetrically arranged or asymmetrically arranged. For example, among a plurality of heat exchange tube holes 113 arranged in a row, the flow-guiding flanges 13 located on both sides of the outermost heat exchange tube hole 113 are asymmetrically arranged. In actual application, the side fold 15 on the side of the substrate 11 can be used to replace the flow-guiding flange 13 located on the outermost side.

[0058] It should be noted that the flow-guiding flange 13 can be formed by the flange of the flange hole penetrated on the substrate 11. For example, a rectangular flange hole can be formed on the substrate 11, and the rectangular flange of the rectangular flange hole is folded toward the first side surface 111 to form the flow-guiding flange 13, which has a simple structure and is easy to process and form. Alternatively, the flow-guiding flange 13 can be fixed to the first side surface 111 of the substrate 11 by welding, bonding, etc. In addition, the flow-guiding flange 13 can be a flat plate structure or an arc-shaped plate structure with a certain curvature, which is not specifically limited here.

[0059] like Figure 3 As shown, in one embodiment, the substrate 11 has a second side edge facing away from the smoke inlet direction; the second side edge is provided with a wake fold edge 14 folded toward the first side surface 111, and the wake fold edge 14 is arranged opposite to the first flow guide structure, and the wake fold edge 14 is arched toward the side close to the first flow guide structure.

[0060] In this embodiment, the first side edge of the substrate 11 is the lower side edge of the substrate 11, and the second side edge of the substrate 11 is the upper side edge of the substrate 11, and the flue gas flows from the first side edge of the substrate 11 to the second side edge. A tail flow fold 14 is provided at a position corresponding to the first flow guiding structure at the second side edge of the substrate 11, and the tail flow fold 14 can be used to conduct secondary flow guidance for the flue gas that fails to be guided to the other side of the heat exchange fin 10 between the flow guiding convex hulls 12, thereby extending the flow of the flue gas out of the heat exchange fin 10, so as to weaken the flue gas turbulence separation effect caused by the heat exchange tube hole 113, strengthen the contact between the incoming flue gas and the tail area of ​​the heat exchange tube 20, and further promote the heat exchange between the flue gas and the fin. Among them, the tail flow fold 14 can be set to a "V"-shaped, "U"-shaped or arc-shaped structure that arches toward the side close to the first flow guiding structure, etc. For example, a "V"-shaped groove is provided at the second side edge of the substrate 11, and a "V"-shaped tail flow fold 14 is formed at the edge of the "V"-shaped groove. Optionally, the corners of the wake fold 14 are rounded, so that the structure of the wake fold 14 is smoother, which can reduce the generation of vortices and reduce smoke flow losses.

[0061] In one embodiment, the second side edge is provided with a smoke exhaust notch 114, and the smoke exhaust notch 114 is arranged opposite to the heat exchange tube hole 113. In this embodiment, the smoke exhaust notch 114 is used to discharge the tail smoke after heat exchange with the fins, and the size of the smoke exhaust notch 114 can be adjusted according to the smoke flow resistance. For example, when it is necessary to increase the heat exchange resistance of the smoke on the fins, the size of the smoke exhaust notch 114 can be reduced, and the tail flow fold 14 can be appropriately increased. Among them, the smoke exhaust notch 114 can be set to a "V" shape, "U" shape or arc shape according to actual needs.

[0062] On the basis of the above embodiment, in one embodiment, two opposite sides of the substrate 11 along the first direction are respectively provided with side folded edges 15 folded toward the first side surface 111 .

[0063] In this embodiment, side folds 15 are provided on both sides of the base plate 11 to guide the corresponding flue gas into the heat exchanger 100, so as to prevent the flue gas from dispersing and flowing to the outside of the first and last heat exchange tube holes 113 of the heat exchange fins 10, thereby weakening the adequacy of the heat exchange between the flue gas and the fin body. Optionally, the side fold 15 includes a first fold section 151 and a second fold section 152. In the direction of the smoke inlet, the second fold section 152 is located downstream of the first fold section 151, and the second fold section 152 is inclined relative to the first fold section 151 toward the side close to the heat exchange tube hole 113. In this way, the second fold can be used to guide the flue gas to the adjacent heat exchange tube hole 113, and the second fold can also replace the guide flange 13 on the outside of the outermost heat exchange tube hole 113, thereby simplifying the manufacturing process.

[0064] In addition, in one embodiment, the periphery of the heat exchange tube hole 113 is provided with a hole flange 16 folded toward the first side surface 111, and the hole flange 16 can increase the contact area with the heat exchange tube 20, thereby enhancing the heat exchange effect. At the same time, the hole flange 16 can be welded with the heat exchange tube 20 to improve the connection stability between the heat exchange fin 10 and the heat exchange tube 20. Furthermore, the periphery of the hole flange 16 of the heat exchange tube hole 113 can be provided with a plurality of limiting portions 17 at intervals along the circumferential direction, so as to facilitate mutual positioning and maintaining the spacing between any two adjacent heat exchange fins 10 when assembling the heat exchanger 100. In addition, a process hole 115 is also provided on the peripheral side of the heat exchange tube hole 113. Optionally, the process hole 115 is connected to the heat exchange tube hole 113. In actual application, solder can be placed in the process hole 115 first, and then heated to melt the solder and flow into the heat exchange tube hole 113, so as to achieve welding and fixation of the heat exchange tube 20 and the heat exchange fin 10, simplifying the connection structure and improving assembly efficiency.

[0065] like Figure 1 As shown, the utility model also proposes a heat exchanger 100, which includes a heat exchange fin 10 and a heat exchange tube 20, and the heat exchange tube 20 is inserted into the heat exchange tube hole 113 of the heat exchange fin 10. Specifically, a plurality of heat exchange fins 10 are arranged side by side, and a plurality of heat exchange tubes 20 are inserted into a plurality of heat exchange tube holes 113 of each heat exchange fin 10 one by one. The specific structure of the heat exchange fin 10 refers to the above embodiment. Since the heat exchanger 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0066] The utility model also provides a gas water heater, including a heat exchanger 100. The specific structure of the heat exchanger 100 refers to the above embodiment. Since the gas water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the gas water heater includes but is not limited to a gas water heater, a wall-mounted boiler, etc.

[0067] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied 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: include: A substrate having a first side surface and a second side surface opposite to each other, wherein the substrate is provided with a plurality of heat exchange tube holes arranged at intervals along a first direction; as well as A first flow guiding structure is provided between two adjacent heat exchange tube holes, the first flow guiding structure comprises a flow guiding convex package convexly provided on the first side surface, the flow guiding convex package is provided with an opening on a side facing the smoke inlet direction, and the opening is used to guide the airflow from the first side surface to the second side surface; Wherein, the first direction intersects with the smoke entering direction.

2. The heat exchange fin according to claim 1, characterized in that: The first flow-guiding structure comprises a plurality of flow-guiding convex humps, the plurality of flow-guiding convex humps are arranged in a plurality of rows in the smoke inlet direction, and the flow-guiding convex humps in two adjacent rows are arranged in a staggered row.

3. The heat exchange fin according to claim 2, characterized in that: In the smoke inlet direction, the number of the guide convex hulls located in the upstream row is less than the number of the guide convex hulls located in the adjacent downstream row; and / or, The substrate has a first side edge facing the smoke inlet direction, and among the plurality of guide convex humps of the first guide structure, the guide convex hump located most upstream is arranged on the first side edge.

4. The heat exchange fin according to claim 1, characterized in that: A concave cavity is formed on the side of the guide convex hull facing the second side surface, and the concave cavity has a guide surface facing the opening, and the guide surface is used to guide the airflow in the concave cavity to flow toward the second side surface.

5. The heat exchange fin according to claim 4, characterized in that: The flow-guiding convex hull is arranged to be gradually reduced toward one side of the convexity.

6. The heat exchange fin according to claim 1, characterized in that: The guide convex hull has an end wall opposite to and spaced from the first side surface, and a side surrounding wall connecting an edge of the end wall with the first side surface, wherein the side surrounding wall is arranged in an arc shape arched toward a side away from the opening.

7. The heat exchange fin according to claim 1, characterized in that: It also includes a second flow guiding structure protruding from the first side surface, the second flow guiding structure is located between two adjacent heat exchange tube holes, the second flow guiding structure is located downstream of the first flow guiding structure in the smoke inlet direction, and the second flow guiding structure is used to guide the airflow to flow toward the heat exchange tube holes on both sides.

8. The heat exchange fin according to claim 7, characterized in that: The second flow guiding structure includes two flow guiding flanges arranged at intervals along the first direction, the interval between the two flow guiding flanges is arranged opposite to the first flow guiding structure, the two flow guiding flanges are arranged at an angle, and each of the flow guiding flanges is inclined toward the adjacent heat exchange tube hole relative to the smoke inlet direction.

9. The heat exchange fin according to claim 1, characterized in that: The substrate has a second side edge facing away from the smoke inlet direction; The second side edge is provided with a wake folded edge folded toward the first side, the wake folded edge is arranged opposite to the first flow guide structure, and the wake folded edge is arched toward the side close to the first flow guide structure; and / or, the second side edge is provided with a smoke exhaust notch, and the smoke exhaust notch is arranged opposite to the heat exchange tube hole.

10. The heat exchange fin according to any one of claims 1 to 9, characterized in that: The substrate is provided with side folding edges folded toward the first side surface at two opposite sides along the first direction.

11. A heat exchanger, characterized in that: include: The heat exchange fin according to any one of claims 1 to 10; as well as A heat exchange tube is inserted into the heat exchange tube hole of the heat exchange fin.

12. A gas water heater, characterized in that: Comprising the heat exchanger of claim 11.

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