Heat exchange fin, heat exchanger and gas water heating equipment
By designing the first flow-guiding convex hull on the substrate of the heat exchange fin, the problem of weak heat exchange capacity in the tail area of the heat exchange tube hole in the finned tube heat exchanger is solved, and effective flow diversion and disturbance of the flue gas is achieved flow improves heat exchange efficiency.
Patent Information
- Application Number
- CN202420715424.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-08
AI Technical Summary
In the finned tube heat exchanger, the heat exchange capacity of the tail area of the heat exchange tube hole is weak, which affects the heat exchange efficiency, resulting in the inability to flow effectively to the heat exchange tube hole for heat exchange.
A heat exchange fin is designed, including a substrate and a first flow convex hull. The first flow convex hull is located between two adjacent heat exchange tube holes, and the protrusion is facing the smoke inlet side and extends to the heat exchange tube on both sides. The back side of the hole ensures flow diversion and spoiler and enhances the heat exchange capacity of the tail area.
Through effective flow diversion and spoiler, the flue gas can be better directed to the back side of the heat exchange pipe hole, improving the heat exchange efficiency, avoiding thermal conductivity and enhancing the heat exchange ability of the heat exchange fins.
Smart Images
Figure CN222231403U_ABST
Abstract
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 heat exchange tubes and heat exchange fins, and the heat exchange tubes are inserted into the heat exchange tube holes of the heat exchange fins. In the related art, there is a large spacing area between two adjacent heat exchange tube holes of the heat exchange fins, and part of the flue gas can be easily discharged directly from the spacing area and cannot flow to the tail area of the heat exchange tube hole for heat exchange, so that the heat exchange capacity of the tail area of the heat exchange tube hole is not strong, affecting the heat exchange efficiency. Utility Model Content
[0004] The main purpose of the utility model is to provide a heat exchange fin, which is intended to effectively guide and turbulent the flue gas while strengthening the heat exchange capacity of the tail area of the heat exchange tube hole and improving the heat exchange efficiency.
[0005] In order to achieve the above-mentioned purpose, the heat exchange fin proposed by the utility model comprises:
[0006] A base plate is provided with a plurality of heat exchange tube holes arranged at intervals along a first direction; and
[0007] A first flow-guiding convex hump is convexly arranged on the first side surface of the substrate and is located between two adjacent heat exchange tube holes; the middle portion of the first flow-guiding convex hump protrudes toward the smoke inlet side of the substrate, and the two sides of the first flow-guiding convex hump are respectively extended toward the back-smoke sides of the adjacent heat exchange tube holes; the projection length of the first flow-guiding convex hump toward the smoke inlet direction is not less than the projection length of the interval between the two adjacent heat exchange tube holes toward the smoke inlet direction; wherein the first direction intersects with the smoke inlet direction.
[0008] In one embodiment, the first flow-guiding convex hull is continuously extended;
[0009] Alternatively, the first flow-guiding convex hull has a plurality of flow-guiding segments arranged at intervals, and projections of two adjacent flow-guiding segments toward the smoke inlet direction are connected or partially overlapped.
[0010] In one embodiment, the first flow-guiding convex hull has a first flow-guiding section and two second flow-guiding sections; in the smoke-inlet direction, the first flow-guiding section is located upstream of the two second flow-guiding sections, and the second flow-guiding sections are arranged one-to-one at the periphery of the back-smoke side of the adjacent heat exchange tube holes;
[0011] The two second flow guide sections are respectively connected to two ends of the first flow guide section;
[0012] Alternatively, the two second guide segments are respectively arranged at two ends of the first guide segment at intervals, and the second guide segment is connected to or partially overlaps with the projection of the first guide segment toward the smoke inlet direction.
[0013] In one embodiment, the first flow guide section is arranged in an arc shape convex toward the smoke inlet side of the substrate;
[0014] And / or, the second flow guide section is arranged in an arc shape which is consistent with the bending direction of the peripheral edge of the back-tobacco side of the corresponding heat exchange tube hole.
[0015] In one embodiment, the heat exchange fin is used to cooperate with another adjacent heat exchange fin to form a fin interval for smoke flow between the two adjacent heat exchange fins; the protrusion height of at least part of the first guide convex bump in the thickness direction of the substrate is not less than the fin interval;
[0016] And / or, the first flow-guiding convex hump is arranged to be gradually reduced toward the protruding side in the thickness direction of the substrate.
[0017] In one embodiment, the heat exchange fin further includes a second guide convex bump protruding from the first side surface, and each heat exchange tube hole is provided with a second guide convex bump on both sides along the first direction, and the second guide convex bump is located upstream of the first guide convex bump in the smoke inlet direction;
[0018] And / or, the heat exchange fin further comprises a third flow guide bulge protruding from the first side surface, and among the plurality of heat exchange tube holes arranged side by side along the first direction, the outer sides of the two outermost heat exchange tube holes are respectively provided with the third flow guide bulge.
[0019] In one of the embodiments, the heat exchange fin further includes a guide flange protruding from the first side surface, the guide flange is arranged in one-to-one correspondence with the heat exchange tube hole, and the guide flange is located between the corresponding heat exchange tube hole and the smoke outlet side edge of the substrate.
[0020] In one embodiment, the substrate is provided with a flange hole, and the annular flange of the flange hole forms the guide flange;
[0021] Alternatively, a notch groove is provided on the smoke outlet side edge of the substrate, and the flow guide flange is provided on one side edge of the notch groove facing the heat exchange tube hole.
[0022] In one of the embodiments, a smoke outlet side edge of the substrate is provided with a tail flow folded edge folded toward the first side surface, and the tail flow folded edge is arranged in a one-to-one correspondence with the first flow guide convex bump.
[0023] In one embodiment, the wake fold includes a middle fold section and two side fold sections respectively arranged at both ends of the middle fold section, the middle fold section is curved and convex toward one side close to the first guide bulge, and each of the side fold sections is inclined and extends toward the adjacent heat exchange tube hole relative to the middle fold section.
[0024] In one embodiment, a smoke exhaust notch is provided at the smoke outlet side edge of the substrate, and the smoke exhaust notch is arranged in one-to-one correspondence with the heat exchange tube holes;
[0025] And / or, both side edges of the substrate along the first direction are respectively provided with side folds folded toward the first side surface.
[0026] The utility model also provides a heat exchanger, comprising:
[0027] The heat exchange fin as described above; and
[0028] A heat exchange tube is inserted into the heat exchange tube hole of the heat exchange fin.
[0029] The utility model also provides a gas water heater, comprising the heat exchanger as described above.
[0030] The technical solution of the utility model is to provide a first guide convex hump between two adjacent heat exchange tube holes of the heat exchange fin, the middle part of the first guide convex hump protrudes toward the smoke inlet side of the substrate, and the two sides of the first guide convex hump are respectively extended toward the adjacent heat exchange tube holes, so that the first guide convex hump generally presents a V-shaped structure; when the smoke flows from the smoke inlet side to the smoke outlet side of the substrate, the smoke is first diverted through the middle position of the first guide convex hump, and then the smoke can flow along the two sides of the first guide convex hump toward the back-smoke side periphery of the heat exchange tube holes on both sides, and the first guide convex hump can play a guiding role, and at the same time can also play a smoke turbulence, destroy the boundary layer, and enhance the heat exchange effect. And the projection length of the first guide convex bulge toward the smoke inlet direction is not less than the projection length of the interval between two adjacent heat exchange tube holes toward the smoke inlet direction. While ensuring effective flow guidance and turbulence effects, the smoke can be guided to the smoke-repelling side of the heat exchange tube hole as much as possible, thereby avoiding the weak heat exchange capacity in the tail area of the heat exchange tube hole to improve the heat exchange efficiency. In addition, the first guide convex bulge does not break the substrate of the heat exchange fin, so that the substrate is still in a continuous state. During the heat exchange process, the temperatures of different areas of the heat exchange fin are different, and heat conduction transfer will be carried out to avoid heat conduction obstruction. The heat exchange fins of this technical solution can effectively guide and turbulent the smoke, while strengthening the heat exchange capacity of the tail area of the heat exchange tube hole of the heat exchange fin and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] 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.
[0032] Figure 1 This is a schematic structural diagram of an embodiment of a heat exchanger of the utility model;
[0033] Figure 2 for Figure 1 Schematic diagram of the partial structure of the heat exchanger (the arrows in the figure indicate the flow path of the flue gas);
[0034] Figure 3 This is a structural schematic diagram of an embodiment of a heat exchange fin of the utility model;
[0035] Figure 4 It is a structural schematic diagram of another embodiment of the heat exchange fin of the utility model.
[0036] Description of Figure Numbers:
[0037] Label name Label name 100 Heat Exchanger 13 Second guide convex hull 10 Heat exchange fins 14 The third guide convex hull 11 substrate 15 Diversion flange 11a First side 16 Wake fold 11b Second side 161 Middle fold section 111 Heat exchange tube hole 162 Side hem section 112 Flanged hole 17 Side hem 113 Notch 171 The first folding section 114 Smoke exhaust gap 172 The second folding edge 115 Process hole 18 Hole Flanging 12 The first guide convex hull 19 Limiting part 121 The first diversion section 20 Heat exchange tube 122 The second diversion section
[0038] 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
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] Fin-tube heat exchangers generally include heat exchange tubes and heat exchange fins, and the heat exchange tubes are inserted into the heat exchange tube holes of the heat exchange fins. In the related art, there is a large spacing area between two adjacent heat exchange tube holes of the heat exchange fins, and part of the flue gas can be easily discharged directly from the spacing area and cannot flow to the tail area of the heat exchange tube hole for heat exchange, so that the heat exchange capacity of the tail area of the heat exchange tube hole is not strong, affecting the heat exchange efficiency.
[0044] For the efficiency guarantee of the fin-tube heat exchanger based on metal materials, its heat exchange resistance mainly comes from the heat exchange capacity between the fins and the flue gas side. When the area of the heat exchange fins on the flue gas side is constant, increasing the turbulence intensity caused by the turbulence on the flue gas side can enhance the forced heat exchange effect, which can reduce the heat exchange resistance on the flue gas side to a certain extent and effectively improve the heat exchange efficiency on the flue gas side.
[0045] Based on this, the utility model proposes a heat exchange fin 10, which can effectively disturb the flue gas while enhancing the heat exchange capacity of the tail area of the heat exchange tube hole and improving the heat exchange efficiency by optimizing the design of the guide structure of the heat exchange fin 10.
[0046] Please refer to Figures 1 to 4 In one embodiment of the utility model, the heat exchange fin 10 includes a substrate 11 and a first guide convex bump 12. The substrate 11 is provided with a plurality of heat exchange tube holes 111 arranged at intervals along a first direction; the first guide convex bump 12 is convexly arranged on the first side surface 11a of the substrate 11 and is located between two adjacent heat exchange tube holes 111; the middle portion of the first guide convex bump 12 protrudes toward the smoke inlet side of the substrate 11, and the two sides of the first guide convex bump 12 are respectively extended toward the back-smoke side of the adjacent heat exchange tube holes 111; the projection length of the first guide convex bump 12 toward the smoke inlet direction is not less than the projection length of the interval between the two adjacent heat exchange tube holes 111 toward the smoke inlet direction; wherein, the first direction intersects with the smoke inlet direction.
[0047] 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 fin 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 11a and a second side surface 11b opposite to each other in the thickness direction. In the smoke inlet direction, the substrate 11 has opposite smoke inlet side and smoke outlet side. Taking the smoke inlet direction as the direction from bottom to top as an example, the lower side of the substrate 11 is the smoke inlet side, and the upper side of the substrate 11 is the smoke outlet side. Correspondingly, the lower side edge of the substrate 11 is the smoke inlet side edge, and the upper side edge of the substrate 11 is the smoke outlet side edge. 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 111 for the heat exchange tubes 20 to pass through in a side-by-side manner along a first direction (e.g., the length direction of the substrate 11), and the number of heat exchange tube holes 111 on the substrate 11 matches the number of heat exchange tubes 20 of the heat exchanger 100. The number of heat exchange tube holes 111 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, and correspondingly, the substrate 11 is provided with three heat exchange tube holes 111 arranged in a single row and spaced apart, and the heat exchange tubes 20 and the heat exchange tube holes 111 are interlaced and matched one by one. In some embodiments, when a plurality of heat exchange tubes 20 are arranged in multiple rows, the corresponding plurality of heat exchange tube holes 111 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 111 arranged in a single row is mainly taken as an example. In addition, the shape of the heat exchange tube hole 111 is adapted to the outer peripheral contour of the heat exchange tube 20. For example, the heat exchange tube hole 111 may be a circular hole, an elliptical hole, a square hole or other special-shaped holes, etc. Optionally, the heat exchange tube hole 111 may be a circular hole or an elliptical hole to adapt to the conventional structure of the heat exchange tube 20 and facilitate installation and matching.
[0048] 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 11a of one heat exchange fin 10 is opposite to and spaced from the second side surface 11b 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.
[0049] The first side surface 11a of the substrate 11 is provided with a first guide convex bulge 12, which serves as the main guide part for the incoming flue gas between the heat exchange tubes 20. The first guide convex bulge 12 is provided between any two adjacent heat exchange tube holes 111. Among them, the first guide convex bulge 12 is convexly arranged on the first side surface 11a along the thickness direction of the substrate 11. In practical applications, in order to facilitate production and manufacturing, the first guide convex bulge 12 can be stretched and formed from the second side surface 11b of the substrate 11 toward the first side surface 11a through a stretching process. Compared with the traditional flanging structure, which needs to form corresponding punching holes on the substrate 11 during production and manufacturing, the convex bulge structure formed by the stretching process will not break the substrate 11, so that the substrate 11 is still in a continuous state. During the heat exchange process, the temperatures of different areas of the heat exchange fins 10 are different, and heat transfer will be carried out, thereby avoiding heat conduction obstruction. Usually, a certain gap is left between the edges of both sides of the first flow-guiding convex bump 12 and the periphery of the adjacent heat exchange tube hole 111 , and the gap forms a smoke channel for the smoke to pass through.
[0050] like Figure 3 and Figure 4 As shown, the first flow-guiding convex bulge 12 generally presents a V-shaped structure. In the extension direction of the first flow-guiding convex bulge 12, the middle part of the first flow-guiding convex bulge 12 protrudes toward the smoke inlet side of the substrate 11, and the two sides of the first flow-guiding convex bulge 12 are respectively extended toward the back-smoke side of the adjacent heat exchange tube hole 111. For example, in one embodiment, the first flow-guiding convex bulge 12 has a first flow-guiding section 121 and two second flow-guiding sections 122 respectively located at both ends of the first flow-guiding section 121, then the first flow-guiding section 121 can be regarded as the middle position of the first flow-guiding convex bulge 12, the first flow-guiding section 121 protrudes toward the smoke inlet side of the substrate 11 compared to the two second flow-guiding sections 122 on both sides, and the two second flow-guiding sections 122 are respectively extended toward the back-smoke side of the adjacent heat exchange tube hole 111. The projection length of the first flow-guiding convex bulge 12 toward the smoke inlet direction is not less than the projection length of the interval between the two adjacent heat exchange tube holes 111 toward the smoke inlet direction. Specifically, the heat exchange fin 10 is projected toward the plane where the smoke inlet side is located, and the projection formed by the first guide convex hull 12 has a first projection length, and the projection formed by the interval between the two heat exchange tube holes 111 located on both sides of the first guide convex hull 12 has a second projection length, and the first projection length is greater than or equal to the second projection length. In other words, the projection of the first guide convex hull 12 toward the smoke inlet direction can completely cover the projection of the interval between the two adjacent heat exchange tube holes 111 toward the smoke inlet direction.
[0051] It is worth noting that the first flow guiding convex hull 12 can be a single convex hull structure (such as Figure 3 Alternatively, the first flow-guiding convex hull 12 may also be a convex hull group structure formed by combining a plurality of convex hulls (i.e., flow-guiding sections) disposed at intervals (e.g., Figure 4As long as it is ensured that, overall, the projection length of the first flow guiding convex bump 12 toward the smoke inlet direction is not less than the projection length of the interval between two adjacent heat exchange tube holes 111 toward the smoke inlet direction.
[0052] It is understandable that during the flow of smoke, the side of the heat exchange tube hole 111 facing the smoke inlet direction is the smoke inlet side of the heat exchange tube hole 111, and the other side opposite thereto is the back-smoke side of the heat exchange tube hole 111. Taking the smoke inlet direction as the direction from bottom to top as an example, the lower side of the heat exchange tube hole 111 is the smoke inlet side, and the upper side of the heat exchange tube hole 111 is the back-smoke side. Due to the obstruction of the heat exchange tube 20, it is difficult for smoke to flow to the back-smoke side of the heat exchange tube hole 111 (that is, the tail area of the heat exchange tube hole 111), so that the heat exchange capacity of the tail area of the heat exchange tube hole 111 is not strong, affecting the heat exchange efficiency.
[0053] The technical solution of the utility model is to provide a first guide convex hump 12 between two adjacent heat exchange tube holes 111 of the heat exchange fin 10, the middle part of the first guide convex hump 12 protrudes toward the smoke inlet side of the substrate 11, and the two sides of the first guide convex hump 12 are respectively extended toward the adjacent heat exchange tube holes 111, so that the first guide convex hump 12 generally presents a V-shaped structure; when the smoke flows from the smoke inlet side to the smoke outlet side of the substrate 11, the smoke is first diverted through the middle position of the first guide convex hump 12, so that the smoke can flow along the two sides of the first guide convex hump 12 toward the back-smoke side periphery of the heat exchange tube holes 111 on both sides, and the first guide convex hump 12 can play a guiding role, and at the same time can also play a smoke turbulence, destroy the boundary layer, and enhance the heat exchange effect. And the projection length of the first guide convex hump 12 toward the smoke inlet direction is not less than the projection length of the interval between two adjacent heat exchange tube holes 111 toward the smoke inlet direction. While ensuring effective flow guidance and turbulence effects, the smoke can be guided to the smoke-repelling side of the heat exchange tube hole 111 as much as possible, thereby avoiding the heat exchange capacity of the tail area of the heat exchange tube hole 111 to be weak, so as to improve the heat exchange efficiency. In addition, the first guide convex hump 12 does not break the substrate 11 of the heat exchange fin 10, so that the substrate 11 is still in a continuous state. During the heat exchange process, the temperatures of different areas of the heat exchange fin 10 are different, and heat conduction transfer will be carried out, which can avoid heat conduction obstruction. The heat exchange fin 10 of the present technical solution can effectively guide and turbulent the smoke, while strengthening the heat exchange capacity of the tail area of the heat exchange tube hole of the heat exchange fin, thereby improving the heat exchange efficiency.
[0054] The first flow guiding convex hull 12 may be a single convex hull structure that is continuously extended, or the first flow guiding convex hull 12 may be a convex hull group structure formed by combining a plurality of convex hulls (i.e., flow guiding sections) that are spaced apart. Several embodiments of the first flow guiding convex hull 12 are described below.
[0055] like Figure 3As shown, in one embodiment, the first guide convex hump 12 is continuously extended. That is, the first guide convex hump 12 has no interruption in its extension direction. For example, the first guide convex hump 12 can be continuously extended in a V-shaped or V-like structure. In this embodiment, the first guide convex hump 12 is a single convex hump continuously extended, with a simple structure, and only requires one-time stretching and forming, which is easy to produce.
[0056] like Figure 3 As shown, further, the first guide bulge 12 has a first guide section 121 and two second guide sections 122; in the smoke inlet direction, the first guide section 121 is located upstream of the two second guide sections 122, and the second guide sections 122 are arranged one-to-one at the back-smoke side periphery of the adjacent heat exchange tube holes 111; the two second guide sections 122 are respectively connected to the two ends of the first guide section 121.
[0057] In this embodiment, the first guide section 121 and the second guide section 122 of the first guide bulge 12 are continuously connected. The first guide section 121 protrudes toward the smoke inlet side of the substrate 11 compared to the two second guide sections 122. The two second guide sections 122 extend in the smoke inlet direction and are inclined toward the adjacent heat exchange tube hole 111. The second guide section 122 is arranged around a portion of the periphery of the back-smoke side of the heat exchange tube hole 111, so that the first guide bulge 12 presents a continuously extended V-shaped structure. When the smoke flows from the smoke inlet side of the substrate 11 toward the smoke outlet side, the smoke first contacts the first guide section 121, and the smoke is guided to the second guide sections 122 on both sides by the first guide section 121, and then the smoke is guided to the periphery of the back-smoke side of the heat exchange tube holes 111 on both sides by the second guide section 122, thereby enhancing the heat exchange capacity of the tail area of the heat exchange tube holes 111, so that the smoke can fully contact the tail of the heat exchange tube 20 for heat exchange, so that the heat on both sides of the heat exchange tube 20 is more evenly heated, further improving the heat exchange efficiency. Optionally, the first guide section 121 is set in an arc shape that is convex toward the smoke inlet side of the substrate 11. In this way, the two second guide sections 122 can be smoothly connected by the first guide section 121 set in an arc shape, which is conducive to reducing the smoke resistance, so that the smoke can be more smoothly guided from the first guide section 121 to the second guide sections 122 on both sides. Optionally, the second guide section 122 is arranged in an arc shape consistent with the bending direction of the peripheral edge of the back-tobacco side of the corresponding heat exchange tube hole 111. In this way, the shape of the second guide section 122 is adapted to the shape of the peripheral edge of the back-tobacco side of the heat exchange tube hole 111, so that the smoke can be better guided along the peripheral edge of the back-tobacco side of the heat exchange tube hole 111 to achieve full contact and heat exchange with the back of the heat exchange tube 20. Of course, in other embodiments, the second guide section 122 can also be arranged in a straight line extending obliquely toward the adjacent heat exchange tube hole 111 relative to the smoke inlet direction.
[0058] like Figure 4 As shown, in another embodiment, the first guide convex hump 12 has a plurality of guide segments arranged at intervals, and projections of two adjacent guide segments in the smoke inlet direction are connected or partially overlapped.
[0059] In the present embodiment, the first guide convex hull 12 is a convex hull group structure formed by a combination of a plurality of guide segments arranged at intervals, and each guide segment is equivalent to a small guide convex hull. The projections of two adjacent guide segments in the direction of smoke inlet are connected or partially overlapped, that is, the end of the projection of one guide segment in the direction of smoke inlet is just connected to the end of the projection of another adjacent guide segment in the direction of smoke inlet; or, the projections of two adjacent guide segments in the direction of smoke inlet have a partially overlapping section. As long as it is ensured that the projection length of the first guide convex hull 12 formed by the combination of multiple guide segments in the direction of smoke inlet is not less than the projection length of the interval between the two adjacent heat exchange tube holes 111 in the direction of smoke inlet. Among them, the number of guide segments can be two, three, four or more, which is not specifically limited here. The shape of the guide segment can be a circular convex hull, a square convex hull, an arc convex hull, a horseshoe-shaped convex hull, etc.; the shapes of multiple guide segments can be exactly the same or different, which is not specifically limited here.
[0060] like Figure 4 As shown, further, the first guide bulge 12 has a first guide section 121 and two second guide sections 122; in the smoke inlet direction, the first guide section 121 is located upstream of the two second guide sections 122, and the second guide sections 122 are one-to-one arranged at the back-smoke side periphery of the adjacent heat exchange tube holes 111; the two second guide sections 122 are respectively spaced at both ends of the first guide section 121, and the second guide section 122 is connected to or partially overlapped with the projection of the first guide section 121 toward the smoke inlet direction.
[0061] In this embodiment, the first guide convex hull 12 is a convex hull group structure formed by combining the first guide section 121 and the second guide section 122 arranged at intervals. The second guide section 122 is connected to or partially overlaps with the projection of the first guide section 121 toward the smoke inlet direction, so that the projection length of the first guide convex hull 12 toward the smoke inlet direction is not less than the projection length of the interval between the two adjacent heat exchange tube holes 111 toward the smoke inlet direction. When the smoke flows from the smoke inlet side of the substrate 11 toward the smoke outlet side, the smoke first contacts the first guide section 121, and the smoke is guided to the second guide section 122 on both sides by the first guide section 121, and then the smoke is guided to the back smoke side periphery of the heat exchange tube hole 111 on both sides by the second guide section 122, thereby enhancing the heat exchange capacity of the tail area of the heat exchange tube hole 111, so that the smoke can fully contact with the tail of the heat exchange tube 20 for heat exchange, so that the heat on both sides of the heat exchange tube 20 is more evenly heated, further improving the heat exchange efficiency. Optionally, the first guide section 121 is set in an arc shape that is convex toward the smoke inlet side of the substrate 11. In this way, the two second guide sections 122 can be smoothly connected by the first guide section 121 set in an arc shape, which is conducive to reducing the smoke resistance, so that the smoke can be more smoothly guided from the first guide section 121 to the second guide sections 122 on both sides. Optionally, the second guide section 122 is set in a straight line that extends obliquely toward the back smoke side of the adjacent heat exchange tube hole 111 relative to the smoke inlet direction, with a simple structure and easy processing. Of course, in other embodiments, the second guide section 122 can also be set in an arc shape that is consistent with the bending direction of the back smoke side periphery of the corresponding heat exchange tube hole 111. The shape of the second guide section 122 is adapted to the shape of the back smoke side periphery of the heat exchange tube hole 111, so that the smoke can be better guided along the back smoke side periphery of the heat exchange tube hole 111, so as to achieve full contact and heat exchange with the back of the heat exchange tube 20.
[0062] In actual application, a plurality of heat exchange fins 10 are arranged side by side, and a fin gap for smoke flow is formed between two adjacent heat exchange fins 10. The convex structure on the heat exchange fin 10 is generally formed by stretching, and accordingly, a concave cavity is formed at a position opposite to the convex structure on the second side 11b of the substrate 11. In order to further improve the heat exchange effect, in one of the embodiments, the protrusion height of at least part of the first guide convex bulge 12 in the thickness direction of the substrate 11 is not less than the fin gap. That is, the protrusion height of at least part of the first guide convex bulge 12 in the thickness direction of the substrate 11 is greater than or equal to the fin gap between two adjacent heat exchange fins 10. In this way, after assembly is completed, the highest protrusion position of the first guide convex bulge 12 of one of the heat exchange fins 10 can at least partially extend into the concave cavity on the back of another adjacent heat exchange fin 10. Figure 2As shown, from the cross section parallel to the smoke inlet direction, an S-shaped smoke flow channel is formed between two adjacent heat exchange fins 10, which can repeatedly change the direction of the smoke flow, guide the smoke to the concave cavity on the back of the convex package and then discharge it, thereby strengthening the turbulent contact of the smoke on the fin surface and enhancing heat exchange.
[0063] It is worth noting that the protrusion height of at least part of the first guide bulge 12 in the thickness direction of the substrate 11 is greater than or equal to the fin spacing. The protrusion height of part of the guide section of the first guide bulge 12 in the thickness direction of the substrate 11 may be greater than or equal to the fin spacing, or the protrusion height of the first guide bulge 12 as a whole in the thickness direction of the substrate 11 may be greater than or equal to the fin spacing. For example, in one embodiment, when the first guide bulge 12 is a single bulge structure that is continuously extended, the protrusion height of the first guide bulge 12 in the thickness direction of the substrate 11 may be greater than or equal to the fin spacing. For another example, in another embodiment, when the first guide bulge 12 is a bulge group formed by combining the first guide section 121 and the second guide section 122 that are spaced apart, at least the protrusion height of the first guide section 121 in the thickness direction of the substrate 11 is greater than or equal to the fin spacing.
[0064] Please combine Figure 2 and Figure 3 In one of the embodiments, the first guide bulge 12 is tapered toward the protruding side in the thickness direction of the substrate 11. For example, in the thickness direction of the substrate 11, the first guide bulge 12 protrudes from the first side 11a of the substrate 11 toward the side away from the second side 11b, and the first guide bulge 12 is tapered toward the side away from the second side 11b. In this way, the first guide bulge 12 has a certain taper in the protruding direction, which can ensure that when the height of the bulge is greater than the fin gap, the first guide bulge 12 of one heat exchange fin 10 can be smoothly inserted into the concave cavity on the back of the bulge of another heat exchange fin 10 without causing interference. And in the thickness direction of the substrate 11, the first guide bulge 12 has a certain taper, which can avoid rupture at the connection during the stretching process to ensure the structural integrity of the bulge and the processing quality. Specifically, a cross section of the first flow guiding convex hull 12 cut along a plane perpendicular to the substrate 11 is a cross section of the first flow guiding convex hull 12 , wherein the cross section of the first flow guiding convex hull 12 may be triangular, trapezoidal, fan-shaped, or the like.
[0065] like Figure 3 and Figure 4As shown, in some embodiments, the heat exchange fin 10 also includes a second guide bulge 13 protruding from the first side surface 11a, and each of the heat exchange tube holes 111 is provided with a second guide bulge 13 on both sides along the first direction respectively, and in the smoke inlet direction, the second guide bulge 13 is located upstream of the first guide bulge 12.
[0066] In this embodiment, each heat exchange tube hole 111 is provided with a second guide convex bulge 13 on both sides along the first direction, and there is a certain gap between the second guide convex bulge 13 and the periphery of the heat exchange tube hole 111 for smoke flow. In the process of smoke flowing from the smoke inlet side to the smoke outlet side of the substrate 11, the smoke is first guided and disturbed by the second guide convex bulge 13, and then the smoke is guided and disturbed for the second time by the downstream first guide convex bulge 12. Through the cooperation of multiple guide convex bulges, the guide and disturbance effect of the smoke can be further strengthened, and the heat exchange can be further enhanced. Optionally, the projection of the second guide convex bulge 13 toward the substrate 11 is circular, so that the second guide convex bulge 13 is simple in structure and easy to process. Optionally, the second guide convex bulge 13 is gradually reduced in the convex direction. For example, the second guide convex bulge 13 can be a structure similar to a circular convex bulge, such as a truncated cone or a hemispherical shape. Of course, the second guide convex hull 13 can also be designed as a square, triangle, trapezoid, rhombus, horseshoe or other special-shaped convex hull structures. In practical applications, the second guide convex hull 13 can be formed by stretching from the second side 11b of the substrate 11 toward the first side 11a through a stretching process.
[0067] like Figure 3 and Figure 4 As shown, in some embodiments, the heat exchange fin 10 also includes a third guide bulge 14 protruding from the first side surface 11a, and among the multiple heat exchange tube holes 111 arranged side by side along the first direction, the outer sides of the two outermost heat exchange tube holes 111 are respectively provided with the third guide bulge 14.
[0068] In this embodiment, by providing a third guide convex bulge 14 on the outside of the outermost heat exchange tube hole 111, the third guide convex bulge 14 can guide the smoke located on the outermost side toward the adjacent heat exchange tube hole 111 to further enhance the heat exchange. Among them, the third guide convex bulge 14 can be set as a straight convex bulge or an arc convex bulge inclined toward the adjacent heat exchange tube hole 111 relative to the smoke inlet direction. Optionally, the first guide convex bulge 12 is set to be tapered in the convex direction. Specifically, the cross-section obtained by cutting the third guide convex bulge 14 with a plane perpendicular to the substrate 11 is the cross-section of the third guide convex bulge 14, wherein the cross-sectional shape of the third guide convex bulge 14 can be a triangle, a trapezoid, a fan, etc. In practical applications, the third guide convex bulge 14 can be formed by stretching from the second side 11b of the substrate 11 toward the first side 11a through a stretching process.
[0069] Alternatively, if Figure 3 and Figure 4 As shown, the third guide convex bump 14 is arranged corresponding to the periphery of the back-tobacco side of the adjacent heat exchange tube hole 111, and the third guide convex bump 14 is arranged in an arc shape consistent with the bending direction of the periphery of the back-tobacco side of the corresponding heat exchange tube hole 111, so that the smoke can be better guided to the back-tobacco side of the heat exchange tube hole 111, and the heat exchange in the tail area of the heat exchange tube hole 111 can be strengthened. In addition, the third guide convex bump 14 can also be combined with the second guide section 122 of the first guide convex bump 12 located on the other side of the heat exchange tube hole 111 to form a similar "eight"-shaped structure, which is conducive to gathering and discharging the smoke toward the tail of the heat exchange tube hole 111.
[0070] In the above embodiment, by combining the guide convex bumps (such as the first guide convex bump 12, the second guide convex bump 13 and the third guide convex bump 14) on the substrate 11 with the distribution of the fin heat exchange tube holes 111, the flue gas can be well guided to the tail of the heat exchange tube hole 111, thereby reducing the turbulent separation effect at the tail of the heat exchange tube hole 111 caused by the lack of guidance, strengthening the heat exchange in the tail area of the heat exchange tube 20, and improving the heat exchange efficiency.
[0071] like Figure 3 and Figure 4 As shown, in some embodiments, the heat exchange fin 10 also includes a guide flange 15 protruding from the first side surface 11a, and the guide flange 15 is arranged in a one-to-one correspondence with the heat exchange tube hole 111, and the guide flange 15 is located between the corresponding heat exchange tube hole 111 and the smoke outlet side edge of the substrate 11.
[0072] In this embodiment, by providing a flow guide flange 15 between the smoke outlet side edges of the substrate 11 of the heat exchange tube hole 111, the smoke at the tail of the heat exchange tube hole 111 can be disturbed again, and the contact heat exchange between the smoke and the fins can be promoted again, further improving the heat exchange efficiency. Optionally, a smoke exhaust notch 114 is provided at the smoke outlet side edge of the substrate 11, and accordingly, the flow guide flange 15 is located between the corresponding heat exchange tube hole 111 and the smoke exhaust notch 114. Among them, the flow guide flange 15 can be designed as an annular flange, a rectangular flange, a V-shaped flange, a U-shaped flange or other special-shaped flanges as needed, and no specific limitation is made here.
[0073] For example, Figure 3 As shown, in one embodiment, the base plate 11 is provided with a flange hole 112, and the flange hole 112 has an annular flange folded toward the first side surface 11a, and the annular flange forms the guide flange 15. In practical application, the flange hole 112 can be directly punched out on the base plate 11.
[0074] For example, Figure 4As shown, in one embodiment, the smoke outlet side edge of the substrate 11 is provided with a notch groove 113, and the side edge of the notch groove 113 facing the heat exchange tube hole 111 is provided with the guide flange 15. In practical application, the notch groove 113 with flange can be directly punched out on the substrate 11. Optionally, the guide flange 15 can be an arc-shaped flange, and a corresponding notch is formed on the smoke outlet side edge of the substrate 11 to ensure that after the guide flange 15 is folded back to the plane of the substrate 11, the smoke exhaust notch 114 on the smoke outlet side edge of the substrate 11 has a complete arc edge to match the continuous material during the continuous stamping production during the fin processing.
[0075] like Figure 3 and Figure 4 As shown, in some embodiments, the smoke outlet side edge of the substrate 11 is provided with a tail flow fold 16 folded toward the first side surface 11a, and the tail flow fold 16 is arranged one-to-one with the first guide convex hull 12. The tail flow fold 16 can guide and turbulent the smoke again, prolonging the flow of the smoke out of the heat exchange fin 10, so as to weaken the smoke turbulence separation effect caused by the heat exchange tube hole 111, strengthen the contact between the incoming smoke and the tail area of the heat exchange tube 20, and further promote the heat exchange between the smoke and the fin. Among them, the tail flow fold 16 can be set to a "V"-shaped, "U"-shaped or arc-shaped structure arched toward the side close to the first guide convex hull 12, etc.
[0076] like Figure 3 and Figure 4 As shown, in some embodiments, the wake fold 16 includes a middle fold section 161, and two side fold sections 162 respectively arranged at both ends of the middle fold section 161, the middle fold section 161 is curved and convex toward one side close to the first guide bulge 12, and each of the side fold sections 162 is inclined and extends relative to the middle fold section 161 toward the adjacent heat exchange tube hole 111.
[0077] In this embodiment, the middle folding section 161 is generally in a U-shaped structure opening toward the smoke outlet side of the substrate 11, and the side folding sections 162 on both sides cooperate to form a V-shaped structure. The middle folding section 161 is U-shaped and protrudes downward, and each side folding section 162 is inclined and extends toward the adjacent heat exchange tube hole 111 relative to the middle folding section 161, so that the smoke behind the guide convex bag can be guided to the tail of the heat exchange tube hole 111 in advance, thereby accelerating the turbulence effect.
[0078] like Figure 3 and Figure 4As shown, in some embodiments, a smoke exhaust notch 114 is provided at the smoke outlet side edge of the substrate 11, and the smoke exhaust notch 114 is arranged one-to-one with the heat exchange tube hole 111. 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 16 can be appropriately increased. Among them, the smoke exhaust notch 114 can be set to a "V" type, "U" type or arc-shaped structure according to actual needs.
[0079] like Figure 3 and Figure 4 As shown, in some embodiments, the two side edges of the substrate 11 along the first direction are respectively provided with side folds 17 folded toward the first side surface 11a. In this embodiment, by providing side folds 17 on both sides of the substrate 11, the corresponding flue gas is directed into the heat exchanger 100 to prevent the flue gas from dispersing and flowing to the outside of the first and last heat exchange tube holes 111 of the heat exchange fin 10, thereby weakening the adequacy of the heat exchange between the flue gas and the fin body. Optionally, the side fold 17 includes a first fold section 171 and a second fold section 172. In the direction of smoke inlet, the second fold section 172 is located downstream of the first fold section 171, and the second fold section 172 is inclined relative to the first fold section 171 toward the back-tobacco side close to the heat exchange tube hole 111. In this way, the second fold section 172 can be used to guide the flue gas to the back-tobacco side of the adjacent heat exchange tube hole 111, thereby strengthening the heat exchange at the tail of the heat exchange tube hole 111.
[0080] In addition, if Figure 3 and Figure 4 As shown, in some embodiments, the periphery of the heat exchange tube hole 111 is provided with a hole flange 18 folded toward the first side surface 11a, and the hole flange 18 can increase the contact area with the heat exchange tube 20, thereby enhancing the heat exchange effect. At the same time, the hole flange 18 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 18 of the heat exchange tube hole 111 can be provided with a plurality of limiting portions 19 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 111. Optionally, the process hole 115 is connected to the heat exchange tube hole 111. 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 111, 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.
[0081] like Figure 1As 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 111 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 111 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.
[0082] 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.
[0083] 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 base plate is provided with a plurality of heat exchange tube holes arranged at intervals along a first direction; as well as A first flow-guiding convex hump is convexly arranged on the first side surface of the substrate and is located between two adjacent heat exchange tube holes; the middle portion of the first flow-guiding convex hump protrudes toward the smoke inlet side of the substrate, and the two sides of the first flow-guiding convex hump are respectively extended toward the back-smoke sides of the adjacent heat exchange tube holes; the projection length of the first flow-guiding convex hump toward the smoke inlet direction is not less than the projection length of the interval between the two adjacent heat exchange tube holes toward the smoke inlet direction; wherein the first direction intersects with the smoke inlet direction.
2. The heat exchange fin according to claim 1, characterized in that: The first flow-guiding convex hull is arranged to extend continuously; Alternatively, the first flow-guiding convex hull has a plurality of flow-guiding segments arranged at intervals, and projections of two adjacent flow-guiding segments toward the smoke inlet direction are connected or partially overlapped.
3. The heat exchange fin according to claim 1, characterized in that: The first flow-guiding convex hull has a first flow-guiding section and two second flow-guiding sections; in the smoke-inlet direction, the first flow-guiding section is located upstream of the two second flow-guiding sections, and the second flow-guiding sections are arranged one-to-one at the periphery of the back-smoke side of the adjacent heat exchange tube holes; The two second flow guide sections are respectively connected to two ends of the first flow guide section; Alternatively, the two second guide segments are respectively arranged at two ends of the first guide segment at intervals, and the second guide segment is connected to or partially overlaps with the projection of the first guide segment toward the smoke inlet direction.
4. The heat exchange fin according to claim 3, characterized in that: The first flow guide section is arranged in an arc shape protruding toward the smoke inlet side of the substrate; And / or, the second flow guide section is arranged in an arc shape which is consistent with the bending direction of the peripheral edge of the back-tobacco side of the corresponding heat exchange tube hole.
5. The heat exchange fin according to claim 1, characterized in that: The heat exchange fin is used to cooperate with another adjacent heat exchange fin to form a fin interval for smoke flow between the two adjacent heat exchange fins; the protrusion height of at least part of the first guide convex bump in the thickness direction of the substrate is not less than the fin interval; And / or, the first flow-guiding convex bump is arranged to be tapered toward one side of the convexity in the thickness direction of the substrate.
6. The heat exchange fin according to claim 1, characterized in that: The heat exchange fin further includes a second guide convex bump protruding from the first side surface, and each heat exchange tube hole is provided with a second guide convex bump on both sides along the first direction, and the second guide convex bump is located upstream of the first guide convex bump in the smoke inlet direction; And / or, the heat exchange fin further comprises a third flow guide bulge protruding from the first side surface, and among the plurality of heat exchange tube holes arranged side by side along the first direction, the outer sides of the two outermost heat exchange tube holes are respectively provided with the third flow guide bulge.
7. The heat exchange fin according to claim 1, characterized in that: It also includes a guide flange protruding from the first side surface, the guide flange is arranged in a one-to-one correspondence with the heat exchange tube holes, and the guide flange is located between the corresponding heat exchange tube hole and the smoke outlet side edge of the substrate.
8. The heat exchange fin according to claim 7, characterized in that: The base plate is provided with a flange hole, and the annular flange of the flange hole forms the flow guide flange; Alternatively, a notch groove is provided on the smoke outlet side edge of the substrate, and the flow guide flange is provided on one side edge of the notch groove facing the heat exchange tube hole.
9. The heat exchange fin according to claim 1, characterized in that: A tail flow folded edge folded toward the first side surface is provided on the smoke outlet side edge of the substrate, and the tail flow folded edge is arranged in one-to-one correspondence with the first flow guide convex bump.
10. The heat exchange fin according to claim 9, characterized in that: The wake fold includes a middle fold section and two side fold sections respectively arranged at both ends of the middle fold section. The middle fold section is curved and convex toward one side close to the first guide bulge. Each of the side fold sections is inclined and extends toward the adjacent heat exchange tube hole relative to the middle fold section.
11. The heat exchange fin according to any one of claims 1 to 10, characterized in that: A smoke exhaust notch is provided at the smoke outlet side edge of the substrate, and the smoke exhaust notch is arranged in one-to-one correspondence with the heat exchange tube holes; And / or, both side edges of the substrate along the first direction are respectively provided with side folds folded toward the first side surface.
12. A heat exchanger, characterized in that: include: The heat exchange fin according to any one of claims 1 to 11; as well as A heat exchange tube is inserted into the heat exchange tube hole of the heat exchange fin.
13. A gas water heater, characterized in that: Comprising the heat exchanger of claim 12.