Heat exchange fin, heat exchanger and gas water heater

Abstract

The utility model discloses a heat exchange fin, a heat exchanger and a gas water heater, and relates to the technical field of water heaters. The heat exchange fin comprises a base plate, the base plate is provided with a plurality of first installation holes used for installing heat exchange pipes, and the first installation holes are arranged in a row at intervals. The base plate is further provided with second mounting holes used for mounting the heat exchange tubes, and the second mounting holes are located between every two adjacent first mounting holes and staggered from the first mounting holes in the smoke flowing direction. And a groove concavely arranged towards the second mounting hole is formed in one end, deviating from the second mounting hole, of the base plate. According to the technical scheme, the heat exchange efficiency of the heat exchanger can be improved.

Description

Technical Field

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

[0002] Water heaters are common household appliances in our daily lives. Depending on the heat source, they can be categorized as gas, electric, or solar. During use, the hot water produced by the water heater is delivered to the user through a user terminal (such as a faucet or showerhead).

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

[0004] The heat exchanger in the related art uses a single row of heat exchange tubes, which has the problem of low heat exchange efficiency. Utility Model Content

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

[0006] To achieve the above-mentioned object, the heat exchange fin proposed in the present invention includes a base plate, wherein the base plate is provided with a plurality of first mounting holes for mounting heat exchange tubes, wherein the plurality of first mounting holes are arranged in a row at intervals;

[0007] The base plate is further provided with a second mounting hole for mounting the heat exchange tube, the second mounting hole being located between two adjacent first mounting holes and being staggered with the first mounting hole in the direction of flue gas flow;

[0008] The base plate is provided with a groove at one end away from the second mounting hole and is recessed toward the second mounting hole.

[0009] In one embodiment of the present application, an edge of the substrate forms an outer protrusion at the position of the second mounting hole, and the groove is opposite to the outer protrusion; the inner contour of the groove is consistent with the outer contour of the outer protrusion.

[0010] In one embodiment of the present application, the convex portion is in a convex arc shape, and the groove is in a concave arc shape.

[0011] In one embodiment of the present application, the second mounting hole is located above or below the first mounting hole.

[0012] In one embodiment of the present application, the second mounting hole is located in the middle of the heat exchange fin in the width direction.

[0013] In one embodiment of the present application, the number of the first mounting holes is an even number, and the number of the second mounting holes is an odd number.

[0014] In one embodiment of the present application, a guide flange hole is further provided on the substrate, and the guide flange hole is located between two adjacent first mounting holes;

[0015] The guide flange hole has two side flanges inclined relative to the direction of smoke flow and an upper flange connecting the upper ends of the two side flanges. The lower ends of the two side flanges are connected, and the upper ends extend in directions away from each other, so as to guide the smoke to the first mounting holes on both sides.

[0016] In one embodiment of the present application, the diversion flange holes are arranged in a fan shape;

[0017] The lower ends of the two side flanges are connected in a rounded manner; and / or, the upper flange and the upper ends of the two side flanges are connected in a rounded manner.

[0018] In one embodiment of the present application, the substrate is further provided with a flow-guiding convex bump, and the flow-guiding convex bump is arranged below the flow-guiding flange hole at intervals;

[0019] The projection of the guide convex hull on the substrate is arc-shaped, and both ends of the guide convex hull are arranged to be upward.

[0020] To achieve the above objectives, the present application further provides a heat exchanger, comprising:

[0021] two end plates;

[0022] a plurality of heat exchange fins, wherein the plurality of base plates are arranged side by side between the two end plates; and

[0023] The heat exchange tubes are installed in series through the first mounting hole and the second mounting hole.

[0024] In one embodiment of the present application, the second mounting hole is provided above the first mounting hole, the heat exchange tube provided through the first mounting hole is connected to the water inlet pipe, and the heat exchange tube provided through the second mounting hole is connected to the water outlet pipe;

[0025] Alternatively, the second mounting hole is provided below the first mounting hole, the heat exchange tube passing through the first mounting hole is connected to the water outlet pipe, and the heat exchange tube passing through the second mounting hole is connected to the water inlet pipe.

[0026] To achieve the above objectives, the present application also provides a gas water heater, including the above heat exchanger.

[0027] In the heat exchange fins of this utility model, a base plate is provided with a plurality of first mounting holes spaced apart in a row, and a second mounting hole located between two adjacent first mounting holes. The second mounting holes are offset from the first mounting holes in the direction of flue gas flow, thereby increasing the number of heat exchange tubes in the heat exchanger and improving heat exchange efficiency. Simultaneously, a groove is provided on the end of the base plate facing away from the second mounting holes, facing the second mounting holes. This groove can offset the base plate area occupied by the second mounting holes to a certain extent. This allows the number of heat exchange tubes to be increased and heat exchange efficiency to be improved without increasing the base plate area. Consequently, the heat exchange efficiency of the heat exchanger can be increased without increasing the volume of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of an embodiment of the heat exchange fin of the present utility model;

[0030] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0031] Figure 3 for Figure 1 Cross-sectional view at the middle BB;

[0032] Figure 4 For use Figure 1 Schematic diagram of the structure of the water path in the heat exchanger with heat exchange fins in the embodiment;

[0033] Figure 5 for Figure 4 a right side view of the embodiment;

[0034] Figure 6 for Figure 4 A left side view of the embodiment;

[0035] Figure 7 For use Figure 1 Schematic diagram of the structure of the water path in the heat exchanger when the heat exchange fins are used in the embodiment;

[0036] Figure 8 for Figure 7 a right side view of the embodiment;

[0037] Figure 9 for Figure 7 A left side view of the embodiment;

[0038] Figure 10 This is a structural schematic diagram of another embodiment of the heat exchange fin of the present utility model;

[0039] Figure 11 for Figure 10 Cross-sectional view at CC;

[0040] Figure 12 for Figure 10 Cross-sectional view at DD in the middle;

[0041] Figure 13 For use Figure 10 Schematic diagram of the structure of the water path in the heat exchanger with heat exchange fins in the embodiment;

[0042] Figure 14 for Figure 13 a right side view of the embodiment;

[0043] Figure 15 for Figure 13 Left side view of the embodiment.

[0044] Description of Figure Numbers:

[0045] Label name Label name 1 heat exchange fins 12 Diversion flange hole 11 substrate 121 Side Flanged Edge 101 First mounting hole 122 Upper flange 102 Second mounting hole 13 Diversion convex hull 103 groove 2 heat exchange tubes 104 convex part 3 End Plate 105 Solder hole 41 water inlet pipe 42 outlet pipe

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The heat exchanger is a crucial component of a water heater. The structural design of its fins directly impacts the overall thermal efficiency and flue gas emissions of the water heater. In related technologies, heat exchangers using a single row of heat exchange tubes suffer from low heat transfer efficiency. However, using a double row of heat exchange tubes to increase heat transfer efficiency increases the area of ​​the fins, resulting in a larger heat exchanger and a larger mass.

[0052] To this end, the present invention proposes a heat exchange fin 1, which aims to increase the heat exchange efficiency of the heat exchanger without increasing the volume of the heat exchanger.

[0053] In the embodiment of the present utility model, Figure 1 、 Figure 2 、 Figure 10 as well as Figure 11 As shown, the heat exchange fin 1 includes a base plate 11, which is provided with a plurality of first mounting holes 101 for mounting the heat exchange tubes 2, and the plurality of first mounting holes 101 are arranged in a row at intervals; the base plate 11 is also provided with second mounting holes 102 for mounting the heat exchange tubes 2, and the second mounting holes 102 are located between two adjacent first mounting holes 101 and are staggered with the first mounting holes 101 in the direction of flue gas flow; a groove 103 is provided at the end away from the second mounting hole 102 and is recessed toward the second mounting hole 102.

[0054] It can be understood that the heat exchange tube 2 is installed through the first mounting hole 101 and the second mounting hole 102 on multiple substrates 11 arranged side by side to form a heat exchanger. When the heat exchanger is used in a gas device, the high-temperature flue gas generated by the combustion of the gas device flows to the gap between two adjacent substrates 11 and the gap between two adjacent heat exchange tubes 2 to heat the water in the heat exchange tube 2.

[0055] Multiple first mounting holes 101 are arranged in a row at intervals. As will be understood, the arrangement of the multiple first mounting holes 101 is perpendicular to the direction of flue gas flow. Second mounting holes 102 are also provided on the base plate 11. These second mounting holes 102 are offset from the first mounting holes 101 in the direction of flue gas flow. As high-temperature flue gas flows in, a portion of it can engage with the heat exchange tubes 2 at the first mounting holes 101 for heat exchange, while the remaining portion can engage with the heat exchange tubes 2 at the second mounting holes 102 for heat exchange. This increases the number of heat exchange tubes 2 and the heat exchange area, thereby improving the heat exchange efficiency of the heat exchanger. It can be understood that since the second mounting hole 102 is located at a different position from the row where the first mounting hole 101 is located, compared to a conventional heat exchanger with a single row of heat exchange tubes 2, the provision of the second mounting hole 102 will increase the area of ​​the substrate 11. Based on this, this embodiment provides a groove 103 recessed toward the second mounting hole 102 at one end of the substrate 11 away from the second mounting hole 102. The groove 103 can offset the area of ​​the substrate 11 occupied by the second mounting hole 102 to a certain extent, that is, it can reduce the area of ​​the substrate 11. As a result, the number of heat exchange tubes 2 can be increased without increasing the area of ​​the substrate 11, thereby improving the heat exchange efficiency.

[0056] In addition, the second mounting hole 102 is staggered with the first mounting hole 101 on the flue gas flow path. Compared with the method of clamping the second mounting hole 102 between two first mounting holes 101, this embodiment can ensure the air gap between two adjacent first mounting holes 101, preventing the gap from being too small and causing excessive resistance. That is, the number of heat exchange tubes 2 can be increased without changing the position of the first mounting hole 101.

[0057] It should be noted that, under the same specifications, this embodiment increases the number of heat exchange tubes 2 compared to a conventional single-row tube structure, thereby improving heat exchange efficiency. Compared to a conventional double-row tube structure, this embodiment reduces the area of ​​the heat exchange fins 1 without increasing the volume of the entire heat exchanger. For example, taking a conventional single-row tube structure with four tubes as an example, this embodiment can add one tube to the original single-row four-tube structure, bringing the total to five tubes. Compared to a conventional double-row tube structure (three tubes in a single row + two tubes in a single row) with the same five tubes, the heat exchange fins 1 in this embodiment are smaller in height, similar to those of the single-row tube structure.

[0058] The number of the second mounting holes 102 can be determined according to actual conditions, for example, one, two or three, etc. The specific number needs to be determined according to the heat exchange requirements of the water heater.

[0059] In practical applications, the shape and structure of the groove 103 can be determined according to actual conditions, for example, it can be a circular groove, a square groove, a triangular groove, etc. During molding and manufacturing, the groove 103 can be formed by a mold or stamping.

[0060] Optionally, the first mounting hole 101 can be a circular hole or an elliptical hole to accommodate the conventional structure of the heat exchange tube 2 and facilitate installation and matching. Optionally, the second mounting hole 102 can be a circular hole or an elliptical hole to accommodate the conventional structure of the heat exchange tube 2 and facilitate installation and matching. In actual application, the shapes of the first mounting hole 101 and the second mounting hole 102 can be the same or different. The aperture sizes of the first mounting hole 101 and the second mounting hole 102 can be the same or different. For ease of installation and manufacturing, it is preferred that the first mounting hole 101 and the second mounting hole 102 have the same shape and the same aperture size.

[0061] Optionally, the first mounting hole 101 and the second mounting hole 102 are flanged holes, which can increase the connection area between the heat exchange tube 2 and the mounting hole, making the installation of the heat exchange tube 2 more stable and reliable. Furthermore, a solder hole 105 is provided at the top of the mounting hole. In actual application, solder can be placed in the solder hole 105 and then heated to melt the solder and flow into the mounting hole, achieving the welding and fixing function of the heat exchange tube 2 and the base plate 11, simplifying the connection structure and improving assembly efficiency.

[0062] In summary, in the heat exchange fin 1 of the present invention, the base plate 11 is provided with a plurality of first mounting holes 101 spaced apart in a row, and a second mounting hole 102 disposed between two adjacent first mounting holes 101. The second mounting holes 102 are offset from the first mounting holes 101 in the direction of flue gas flow, thereby increasing the number of heat exchange tubes 2 in the heat exchanger and improving heat exchange efficiency. Simultaneously, a recessed groove 103 facing the second mounting hole 102 is provided at the end of the base plate 11 facing away from the second mounting hole 102. This recess 103 can offset the area of ​​the base plate 11 occupied by the second mounting hole 102 to a certain extent. Thus, the number of heat exchange tubes 2 can be increased without increasing the area of ​​the base plate 11, thereby improving heat exchange efficiency. Consequently, the heat exchange efficiency of the heat exchanger can be increased without increasing the volume of the heat exchanger.

[0063] In one embodiment of the present application, Figure 1 and Figure 2 The edge of the substrate 11 forms a protruding portion 104 at the position of the second mounting hole 102 , and the groove 103 is opposite to the protruding portion 104 ; the inner contour shape of the groove 103 is consistent with the outer contour shape of the protruding portion 104 .

[0064] It can be understood that the second mounting hole 102 is offset from the first mounting hole 101 on the flue gas flow path, and the edge of the substrate 11 corresponding to the position where the second mounting hole 102 is located is protruded outward relative to the position where the second mounting hole 102 is not set, that is, the edge of the substrate 11 forms an outer protrusion 104 at the position of the second mounting hole 102. At this time, the groove 103 is opposite to the outer protrusion 104, so that the height dimension of the substrate 11 at the position where the second mounting hole 102 is located is roughly the same as the height dimension of the substrate 11 at other positions where the second mounting hole 102 is not set, that is, the overall height dimension of the substrate 11 is still equivalent to the height dimension when there was only a single row of first mounting holes 101, thereby increasing the number of heat exchange tubes 2 available for installation on the heat exchange fins 1 with the original single row of first mounting holes 101, thereby effectively improving the heat exchange efficiency.

[0065] In actual application, the inner contour of the groove 103 can be the same as or different from the outer contour of the outer protrusion 104. In this embodiment, to facilitate molding and manufacturing, the inner contour of the groove 103 is consistent with the outer contour of the outer protrusion 104, so that the two heat exchange fins 1 can complement each other and fit together. In this way, multiple heat exchange fins 1 can be processed simultaneously through continuous demolding, thereby improving the production efficiency of the heat exchange fins 1.

[0066] Furthermore, if Figure 1 and Figure 2 The outer protrusion 104 is convexly arc-shaped, while the groove 103 is concavely arc-shaped. By configuring the outer protrusion 104 as a convex arc and the groove 103 as a concave arc, the arc-shaped structure can better guide and disperse the airflow compared to a shape with corners, resulting in more uniform smoke distribution. Optionally, the outer protrusion 104 and the groove 103 have the same curvature.

[0067] In actual application, the specific position of the second mounting hole 102 can be determined according to actual conditions. For example, it can be set above the first mounting hole 101 or below the first mounting hole 101 .

[0068] like Figures 1 to 6 When the second mounting hole 102 is arranged above the first mounting hole 101, the heat exchange tube 2 passed through the first mounting hole 101 can be connected to the water inlet pipe 41, and the heat exchange tube 2 passed through the second mounting hole 102 can be connected to the water outlet pipe 42. At this time, the heat exchange tubes 2 in the multiple first mounting holes 101 are connected in series and then connected to the heat exchange tube 2 in the second mounting hole 102, so that the water flows in a bottom-in and top-out manner, which can ensure that the water in the heat exchange tube 2 is always maintained in a full state, further improving the heat exchange efficiency.

[0069] like Figures 10 to 15When the second mounting hole 102 is arranged below the first mounting hole 101, the heat exchange tube 2 passed through the first mounting hole 101 can be connected to the water outlet pipe 42, and the heat exchange tube 2 passed through the second mounting hole 102 can be connected to the water inlet pipe 41. At this time, the water inlet end of the heat exchange tube 2 in the second mounting hole 102 is connected to the water inlet pipe 41, and the water outlet end is connected to the heat exchange tube 2 in the first mounting hole 101. After the multiple heat exchange tubes 2 in the first mounting holes 101 are connected in series, they are connected to the water outlet pipe 42, so that the water flows in a bottom-in and top-out manner, which can ensure that the water in the heat exchange tube 2 is always maintained in a full state, further improving the heat exchange efficiency.

[0070] In order to further improve the heat transfer efficiency, Figure 1 and Figure 10 The second mounting hole 102 is located in the middle of the heat exchange fin 1 in the width direction.

[0071] It is understood that the width of the heat exchange fin 1 is perpendicular to the direction of flue gas flow, meaning that the multiple first mounting holes 101 are spaced apart along the width of the heat exchange fin 1. In actual use, the flue gas temperature in the middle of the width of the heat exchange fin 1 is much higher than that at the ends. Based on this, the second mounting holes 102 are located in the middle of the width of the heat exchange fin 1 in this embodiment. This allows the heat exchange tubes 2 installed in the second mounting holes 102 to exchange heat with the higher-temperature flue gas, further improving heat exchange efficiency and achieving higher water heating efficiency.

[0072] As an example, taking the case where four first mounting holes 101 and one second mounting hole 102 are provided on the substrate 11 , the second mounting hole 102 is located between the two middle first mounting holes 101 .

[0073] In one embodiment of the present application, Figure 1 and Figure 10 , the number of the first mounting holes 101 is an even number, and the number of the second mounting holes 102 is an odd number.

[0074] It can be understood that when the heat exchanger is used in a gas water heater, in terms of the panel direction facing the gas water heater, the water inlet of most gas water heaters on the market is located on the right and the water outlet is located on the left. When the number of heat exchange tubes 2 in the heat exchanger is an even number, the water inlet and outlet of the heat exchanger are usually located on the left side of the heat exchanger at the same time. Then the outlet pipe 42 connected to the outlet is usually bent from the left to the right to smoothly connect with the water outlet of the gas water heater. However, setting such a bent section will not only have no heat gain for the water inside it, but will also occupy space inside the water heater. To this end, in this embodiment, when the number of the first mounting holes 101 is an even number, the number of the second mounting holes 102 is set to an odd number, so that the water inlet end of the heat exchanger is located on the left and the water outlet end is located on the right, so as to match the positions of the water inlet and the water outlet of the water heater. As a result, there is no need to bend the water outlet pipe 42 outside the heat exchanger, which is equivalent to setting the original bending section on the heat exchange fin 1, thereby increasing the heat exchange efficiency without increasing the length of the heat exchange tube 2, and at the same time, reducing the occupied space inside the water heater.

[0075] As an example, taking the heat exchanger originally having four tubes in a single row as an example, after improvement in this embodiment, the number of the first mounting holes 101 can be four, and the number of the second mounting hole 102 can be one. At this time, it is equivalent to improving the original bending section to the heat exchange tube 2 passing through the second mounting hole 102. On the basis of not changing the material consumption, the number of the heat exchange tubes 2 is increased, and the heat exchange efficiency can be effectively improved.

[0076] In order to further improve the heat exchange efficiency, in one embodiment of the present application, Figure 1 、 Figure 3 、 Figure 10 as well as Figure 12 A guide flange hole 12 is also provided on the base plate 11, and the guide flange hole 12 is located between two adjacent first mounting holes 101; the guide flange hole 12 has two side flanges 121 inclined relative to the direction of smoke flow and an upper flange 122 connecting the upper ends of the two side flanges 121. The lower ends of the two side flanges 121 are connected, and the upper ends extend in directions away from each other, so as to guide the smoke to the first mounting holes 101 on both sides.

[0077] The guide flange hole 12 is located between two adjacent first mounting holes 101. It is understood that the guide flange hole 12 is located between two adjacent first mounting holes 101 that are not provided with a second mounting hole 102. When multiple heat exchange fins 1 are arranged side by side, the guide flange hole 12 on each heat exchange fin 1 can connect the gaps on both sides of the heat exchange fin 1. This allows high-temperature flue gas to circulate through the guide flange holes 12 of different heat exchange fins 1, thereby extending the residence time of the high-temperature flue gas within the heat exchanger fins and further enhancing heat exchange.

[0078] The guide flange hole 12 includes two inclined side flanges 121, the lower ends of the two side flanges 121 are connected, and the upper ends extend in directions away from each other, so that the flue gas flowing from below can be blocked by the two side flanges 121 and guided toward both sides, so that the high-temperature flue gas between the two first mounting holes 101 can be guided to the first mounting holes 101 on both sides, so as to fully contact and exchange heat with the heat exchange tubes 2 on both sides, thereby preventing the high-temperature flue gas between the two first mounting holes 101 from being discharged without heat exchange, reducing heat loss and improving heat exchange efficiency.

[0079] It should be noted that the specific location of the guide flange hole 12 can be determined according to actual conditions, such as being located in the middle of the two first mounting holes 101, near the lower end, or near the upper end. In actual application, taking the example of high-temperature flue gas flowing from bottom to top, the flue gas passing through the heat exchange tube 2 will be blocked by the heat exchange tube 2, resulting in a lower temperature in the leeward area of ​​the heat exchange tube 2. Based on this, the guide flange hole 12 in this embodiment can be located in the area near the middle and upper part between the two first mounting holes 101. The two side flanges 121 can guide the high-temperature flue gas to the area near the leeward side of the first mounting holes 101, so that each area of ​​the substrate 11 can be fully heated, the temperature distribution is more uniform, and the heat exchange efficiency is improved.

[0080] Optionally, the two side flanges 121 may be in a V-shaped or U-shaped structure. It is understood that the two side flanges 121 may be symmetrically or asymmetrically arranged, and their specific structures are not limited here.

[0081] As an example, the diversion flange hole 12 is arranged in a fan-shaped configuration and includes an upper flange 122 connecting the upper ends of the two side flanges 121. In this embodiment, the diversion flange hole 12 is arranged in a fan-shaped structure, with the two side flanges 121 forming the two radii of the fan-shaped structure, and the upper flange 122 forming the arc connecting the two side flanges 121. The fan-shaped structure of the diversion flange hole 12 simplifies the processing and ensures more uniform distribution of the smoke diverted through the two side flanges 121.

[0082] In one embodiment, the lower ends of the two side flanges 121 are connected with rounded corners. In this embodiment, by connecting the lower ends of the two side flanges 121 with rounded corners, the flow guide structure is smoother than the corner connection method, which can reduce the generation of vortexes and reduce smoke flow losses.

[0083] In one embodiment, the upper flange 122 is connected to the upper ends of the two side flanges 121 with rounded corners. In this embodiment, by connecting the upper flange 122 to the upper ends of the two side flanges 121 with rounded corners, the flow guide structure is smoother than that of a corner connection, which can reduce the generation of vortices and reduce smoke flow losses.

[0084] Furthermore, if Figure 1 、 Figure 3 、 Figure 10 as well as Figure 12 The substrate 11 is further provided with a guide convex hull 13, which is spaced below the guide flange hole 12; the projection of the guide convex hull 13 on the substrate 11 is arc-shaped, and the two ends of the guide convex hull 13 are upwardly curved.

[0085] By arranging the guide convex bumps 13 at intervals below the guide flange holes 12, the guide convex bumps 13 can guide the high-temperature flue gas to the first mounting holes 101 on both sides. It can be understood that the guide flange holes 12 are used to guide the flue gas to the middle and upper area of ​​the first mounting hole 101, and the guide convex bumps 13 are used to guide the flue gas to the middle and lower area of ​​the first mounting hole 101, thereby further enhancing the heat exchange function between the high-temperature flue gas and the heat exchange tube 2.

[0086] In this embodiment, the surface of the guide convex hull 13 can play a guiding role, allowing the flue gas to flow along the surface of the hull. Compared with the flange / baffle structure and other methods, the high-temperature flue gas will not be completely blocked in the direction from bottom to top, ensuring the upward fluidity of the flue gas and reducing the resistance of the flow channel. The wind speed can be appropriately reduced, thereby improving the flue gas emission indicators of the gas equipment.

[0087] In addition, a cavity is formed in the guide convex hull 13, which allows the high-temperature flue gas to stay in the cavity, prolonging the contact time between the high-temperature flue gas and the substrate 11, so that the hot flue gas can fully contact and exchange heat when passing through the fins, reducing heat loss.

[0088] Furthermore, the projection of the guide bump 13 on the base plate 11 is arc-shaped, with both ends of the guide bump 13 being upwardly curved. This embodiment illustrates the shape and structure of the guide bump 13. The projection of the guide bump 13 on the fin body is arc-shaped, with both ends being upwardly curved, which can guide the flue gas below in an oblique upward direction toward the heat exchange tubes 2 on both sides, further enhancing heat exchange.

[0089] Optionally, the guide bump 13 can be a press-formed guide bump 13 on the substrate 11, which simplifies the manufacturing process and improves manufacturing efficiency. As an example, the cross-sectional shape of the guide bump 13 can be approximately semicircular.

[0090] The utility model also proposes a heat exchanger, such as Figures 4 to 9 、 Figures 13 to 15The heat exchanger comprises two end plates 3, heat exchange fins 1, and heat exchange tubes 2. The specific structure of the heat exchange fins 1 refers to the above-mentioned embodiment. Since this heat exchanger utilizes all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and a detailed description thereof will not be repeated here. Specifically, multiple base plates 11 are arranged side by side between the two end plates 3; the heat exchange tubes 2 are installed in series through the first mounting hole 101 and the second mounting hole 102.

[0091] In one embodiment of the present application, the second mounting hole 102 is located above the first mounting hole 101. The heat exchange tube 2 passing through the first mounting hole 101 is connected to the water inlet pipe 41, while the heat exchange tube 2 passing through the second mounting hole 102 is connected to the water outlet pipe 42. With this arrangement, the heat exchange tubes 2 in the first mounting holes 101 are connected in series and then connected to the heat exchange tube 2 in the second mounting hole 102, so that water flows in a bottom-in, top-out manner. This ensures that the water in the heat exchange tube 2 is always full, further improving heat exchange efficiency.

[0092] In one embodiment of the present application, the second mounting hole 102 is disposed below the first mounting hole 101. The heat exchange tube 2 passing through the first mounting hole 101 is connected to the water outlet pipe 42, while the heat exchange tube 2 passing through the second mounting hole 102 is connected to the water inlet pipe 41. With this arrangement, the water inlet end of the heat exchange tube 2 in the second mounting hole 102 is connected to the water inlet pipe 41, and the water outlet end is connected to the heat exchange tube 2 in the first mounting hole 101. Multiple heat exchange tubes 2 in the first mounting holes 101 are connected in series and then connected to the water outlet pipe 42, so that water flows in a bottom-in, top-out manner, ensuring that the water in the heat exchange tube 2 is always full, further improving heat exchange efficiency.

[0093] The present utility model also proposes a gas water heater, which includes a heat exchanger. The specific structure of the heat exchanger refers to the above-mentioned embodiment. Since the gas water heater adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0094] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat exchange fin, characterized in that: The substrate comprises a base plate, wherein the base plate is provided with a plurality of first mounting holes for mounting heat exchange tubes, wherein the plurality of first mounting holes are arranged in a row at intervals; The base plate is further provided with a second mounting hole for mounting the heat exchange tube, the second mounting hole being located between two adjacent first mounting holes and being staggered with the first mounting hole in the direction of flue gas flow; The substrate is provided with a groove at one end away from the second mounting hole and is recessed toward the second mounting hole; An outer convex portion is formed on the edge of the substrate at the position of the second mounting hole, and the groove is opposite to the outer convex portion; the inner contour of the groove is consistent with the outer contour of the outer convex portion.

2. The heat exchange fin according to claim 1, characterized in that: The outer convex portion is in a convex arc shape, and the groove is in a concave arc shape.

3. The heat exchange fin according to claim 1, characterized in that: The second mounting hole is located above or below the first mounting hole.

4. The heat exchange fin according to claim 3, characterized in that: The second mounting hole is located in the middle of the substrate in the width direction.

5. The heat exchange fin according to any one of claims 1 to 4, characterized in that: The number of the first mounting holes is an even number, and the number of the second mounting holes is an odd number.

6. The heat exchange fin according to any one of claims 1 to 4, characterized in that: The base plate is further provided with a guide flange hole, and the guide flange hole is located between two adjacent first mounting holes; The guide flange hole has two side flanges inclined relative to the direction of smoke flow and an upper flange connecting the upper ends of the two side flanges. The lower ends of the two side flanges are connected, and the upper ends extend in directions away from each other, so as to guide the smoke to the first mounting holes on both sides.

7. The heat exchange fin according to claim 6, characterized in that: The diversion flange holes are arranged in a fan shape; The lower ends of the two side flanges are connected in a rounded manner; and / or, the upper flange and the upper ends of the two side flanges are connected in a rounded manner.

8. The heat exchange fin according to claim 6, characterized in that: The base plate is further provided with a flow-guiding convex bump, and the flow-guiding convex bump is arranged below the flow-guiding flange hole at intervals; The projection of the guide convex hull on the substrate is arc-shaped, and both ends of the guide convex hull are arranged to be upward.

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

10. The heat exchanger according to claim 9, characterized in that The second mounting hole is provided above the first mounting hole, the heat exchange tube passing through the first mounting hole is connected to the water inlet pipe, and the heat exchange tube passing through the second mounting hole is connected to the water outlet pipe; Alternatively, the second mounting hole is provided below the first mounting hole, the heat exchange tube passing through the first mounting hole is connected to the water outlet pipe, and the heat exchange tube passing through the second mounting hole is connected to the water inlet pipe.

11. A gas water heater, characterized in that: Comprising the heat exchanger according to claim 9 or 10.

Images