Heat exchanger fin structure and gas water heater

Abstract

The utility model relates to a heat exchanger fin structure and a gas water heater. Relates to the technical field of water heaters. The heat exchange fin specifically comprises a fin body, a plurality of heat exchange holes formed in the fin body and a flow guide assembly arranged on the fin body. The heat exchange holes are used for allowing heat exchange pipes to penetrate through and limiting the heat exchange pipes, high-temperature flue gas flows in from the front side of the fin body and flows out from the rear side of the fin body, and the flow guide assembly guides the high-temperature flue gas flowing through the fin body and is used for enabling the high-temperature flue gas to be collected in the direction of the multiple heat exchange holes. In the flow direction of high-temperature flue gas, the sectional areas of the air inlet ends of the heat exchange holes are gradually increased, the sectional areas of the air outlet ends of the heat exchange holes are gradually reduced, and the outlines of the heat exchange pipes are matched with the heat exchange holes, so that the contact area between the inner walls of the heat exchange holes and the outer walls of the heat exchange pipes is increased, and the heat exchange capacity of the fin structure is improved; and the flowing resistance of the high-temperature flue gas flowing through the heat exchange tube is reduced, so that the high-temperature flue gas flows on the fin body more smoothly.

Description

Technical Field

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

[0002] Water heaters are an indispensable device for current household life. In terms of the energy used, they can be roughly divided into gas water heaters, electric water heaters and solar water heaters, among which gas water heaters are widely used by the general public. Existing gas water heaters are equipped with a fan, a burner and a heat exchanger inside the body. The heat exchanger is connected to a cold water pipeline and a hot water pipeline. The cold water pipeline and the hot water pipeline can form a water passage. One end of the cold water pipeline has a cold water inlet, which can be connected to an appropriate water source for inputting cold water to be heated. One end of the hot water pipeline has a hot water outlet, and cold water to be heated can be input from the cold water inlet and the cold water pipeline, so that the cold water is transported to the heat exchanger. The cold water enters the heat exchanger for heat exchange, and then the hot water is output from the hot water pipeline and the hot water outlet for use.

[0003] The heat exchanger of a gas water heater is a heat exchange device for high-temperature flue gas and water. The device is usually equipped with certain fins for heat absorption and heat exchange, and the shape of the fins affects the efficiency of heat exchange. The fins of existing heat exchangers are usually flat and straight-surface structures, so the high-temperature flue gas below is easy to rise straight up and flow outward, resulting in poor heat absorption effect of the fins, thereby reducing the heat exchange efficiency of the heat exchanger, and then reducing the heating efficiency of the gas water heater. Utility Model Content

[0004] The purpose of the utility model is to provide a heat exchanger fin structure and a gas water heater to address the deficiencies of the above-mentioned prior art, which can improve the heat exchange capacity of the fin structure and thus improve the heat exchange efficiency of the heat exchanger.

[0005] The utility model proposes a heat exchanger fin structure, including a fin body, a plurality of heat exchange holes arranged on the fin body, and a guide component arranged on the fin body; the heat exchange holes are used for heat exchange tubes to pass through and limit the heat exchange tubes, and high-temperature flue gas flows in from the front side of the fin body and flows out from the rear side of the fin body. The guide component guides the high-temperature flue gas flowing through the fin body to make the high-temperature flue gas converge in the direction of the plurality of heat exchange holes. The end of the heat exchange hole close to the high-temperature flue gas inflow is the air inlet end, and the end close to the high-temperature flue gas outflow end is the air outlet end. Along the flow direction of the high-temperature flue gas, the cross-sectional area of ​​the air inlet end gradually increases, and the cross-sectional area of ​​the air outlet end gradually decreases.

[0006] Furthermore, the end faces of the air inlet end and the air outlet end are arcuate surfaces, and along the flow direction of the high-temperature flue gas, the curvature of the arcuate surface of the air inlet end gradually decreases, and the curvature of the arcuate surface of the air outlet end gradually increases.

[0007] Furthermore, the guide assembly includes a first guide flange arranged on the left and right sides of the fin body, and the multiple heat exchange holes are arranged in the middle of the fin body. The first guide flange extends from the front side of the fin body to the rear side of the fin body to make the high-temperature flue gas converge toward the middle of the fin body.

[0008] Furthermore, the plurality of heat exchange holes are distributed in an array on the fin body, and the heat exchange holes include a front row of heat exchange holes arranged on the front side of the fin body, and a rear row of heat exchange holes arranged on the rear side of the fin body.

[0009] Furthermore, the guide assembly includes second guide flanges arranged on both sides of each of the front row heat exchange holes, and the second guide flanges guide the high-temperature flue gas flowing into the fin body to converge the high-temperature flue gas toward each of the front row heat exchange holes.

[0010] Furthermore, the guide assembly includes a guide boss disposed between two adjacent rear-row heat exchange holes, and the guide boss guides the high-temperature flue gas flowing through the rear-row heat exchange holes so as to make the high-temperature flue gas flow closely along the periphery of the rear-row heat exchange holes.

[0011] Furthermore, the guide boss includes a first boss disposed between two adjacent rear-row heat exchange holes, and the front side surface and adjacent left and right side surfaces of the first boss are provided with a first guide slope for guiding high-temperature flue gas.

[0012] Furthermore, the guide boss also includes a second boss arranged between the two adjacent rear-row heat exchange holes, the second boss is arranged on the rear side of the first boss, and the left and right side surfaces of the second boss are provided with second guide slopes for guiding high-temperature flue gas.

[0013] Furthermore, the fin structure also includes a flow boss arranged on the rear side of the fin body, and a flow channel is arranged in the flow boss, and the high-temperature flue gas flowing through the rear row heat exchange holes flows out of the fin body from the flow channel.

[0014] Furthermore, a welding rod mounting hole is also provided on the fin body, and the welding rod mounting hole is arranged on the outer periphery of the heat exchange hole and is used to fix the heat exchange tube in the heat exchange hole.

[0015] The utility model also provides a gas water heater, including the above-mentioned heat exchanger fin structure, and also includes a box body and the heat exchange tube, a plurality of the fin bodies are arranged in the box body, and the heat exchange tube extends out from one side of the box body after passing through the plurality of the fin bodies in sequence, and the outer contour of the heat exchange tube is adapted to the heat exchange hole.

[0016] The utility model provides a heat exchanger fin structure and a gas water heater having the following gain effects:

[0017] (1) In the fin structure, along the flow direction of the high-temperature flue gas, the cross-sectional area of ​​the heat exchange hole at the air inlet end gradually increases, and the cross-sectional area at the air outlet end gradually decreases. The outer contour of the heat exchange tube is adapted to the heat exchange hole, thereby increasing the contact area between the inner wall of the heat exchange hole and the outer wall of the heat exchange tube, improving the heat exchange capacity of the fin structure, and reducing the flow resistance of the high-temperature flue gas when it flows through the heat exchange tube, so that the high-temperature flue gas flows more smoothly on the fin body;

[0018] (2) The guide assembly of the fin structure includes two first guide flanges, which are respectively arranged on the left and right sides of the fin body. The first guide flanges guide the high-temperature flue gas so that the high-temperature flue gas flows to the middle of the fin body and converges toward the heat exchange tube located in the middle of the fin body, thereby preventing the high-temperature flue gas from escaping from both sides of the fin body and making the high-temperature flue gas fully contact with the heat exchange tube;

[0019] (3) The heat exchange holes of the fin structure at least include a front row of heat exchange holes and a rear row of heat exchange holes. The row of heat exchange holes located on the front side of the fin body is the front row of heat exchange holes, and the row of heat exchange holes located on the rear side of the fin body is the rear row of heat exchange holes. When the high-temperature flue gas flows in from the front side of the fin body, it first flows through the heat exchange tubes fixed in the front row of heat exchange holes, then flows through the heat exchange tubes fixed in the rear row of heat exchange holes, and finally flows out from the rear side of the fin body;

[0020] (4) The flow guide assembly of the fin structure includes a second flow guide flange, and each of the two sides of the front row heat exchange hole is provided with a second flow guide flange. When the high-temperature flue gas flows through the fin body, the second flow guide flanges on both sides of the heat exchange hole guide the high-temperature flue gas, so that the high-temperature flue gas is gathered at the periphery of the heat exchange tube located in the front row, so that the high-temperature flue gas is fully in contact with the heat exchange tube located in the front row;

[0021] (5) The guide assembly of the fin structure includes a guide boss, which is located between two adjacent rear heat exchange holes and guides the high-temperature flue gas flowing between the two adjacent rear heat exchange holes, so that the high-temperature flue gas flows closely to the outer periphery of the heat exchange tubes fixed in the two heat exchange holes, thereby making the high-temperature flue gas fully contact with the heat exchange tubes located in the rear row;

[0022] (6) The fin body of the fin structure is also provided with a flow boss, which is arranged on the rear side of the guide boss. A flow channel is arranged in the flow boss. When the high-temperature flue gas flows through the rear row of heat exchange tubes, the flue gas after heat exchange can flow out of the fin body through the flow channel in the flow boss, thereby accelerating the outflow of the flue gas after heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0024] Figure 1 A schematic diagram of the structure of a heat exchanger fin structure and a smoke distribution diagram of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the installation of a heat exchanger fin structure in a gas water heater according to an embodiment of the utility model.

[0026] In the figure: 1. fin body; 2. front row heat exchange holes; 3. rear row heat exchange holes; 4. first flow guide flange; 5. second flow guide flange; 6. first boss; 7. second boss; 8. flow boss; 9. welding rod mounting hole; 10. heat exchange tube; 11. box body. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] See also Figure 1 and Figure 2 A heat exchanger fin structure according to an embodiment of the utility model comprises a fin body 1, a plurality of heat exchange holes arranged on the fin body 1, and a flow guide component arranged on the fin body 1; the heat exchange holes are used for allowing a heat exchange tube 10 to pass through, and the heat exchange tube 10 is limited, and the high-temperature flue gas flows in from the front side of the fin body 1 and flows out from the rear side of the fin body 1. The flow guide component guides the high-temperature flue gas flowing through the fin body 1 to converge the high-temperature flue gas in the direction of the plurality of heat exchange holes, and the heat exchange holes are elliptical holes.

[0029] In the present application, the heat exchanger fin structure includes a fin body 1. This embodiment also provides a gas water heater, including the above-mentioned heat exchanger fin structure, a box body 11 and a heat exchange tube 10. A plurality of fin bodies 1 are installed in the box body 11, and the heat exchange tube 10 extends out from one side of the box body 11 after sequentially passing through the plurality of fin bodies 1. Heat exchange holes are provided on the fin body 1. When the heat exchange tube 10 sequentially passes through the plurality of fin bodies 1 from one side of the box body 11, it sequentially passes through the heat exchange holes on the plurality of fin bodies 1, and the heat exchange tube 10 is limited by the heat exchange holes.

[0030] The principle of the gas water heater heating cold water is as follows: high-temperature flue gas is introduced into the box body 11, so that the high-temperature flue gas flows through the fin structure, and the high-temperature flue gas is in direct contact with the fin structure and the heat exchange tube 10 fixed on the fin structure, wherein a part of the heat of the high-temperature flue gas is directly heat-exchanged with the heat exchange tube 10 to heat the cold water in the heat exchange tube 10; another part of the heat of the high-temperature flue gas is absorbed by the fin structure, and then directly contacts with the heat exchange tube 10 through the fin structure, and heat-exchanges with the heat exchange tube 10 to heat the cold water in the heat exchange tube 10.

[0031] In the present application, when multiple fin bodies 1 are installed in the box body 11, the high-temperature flue gas flows in from one side of the fin body 1 and flows out from the other side of the fin body 1. The side where the high-temperature flue gas flows in is the front side of the fin body 1, and the side where the high-temperature flue gas flows out is the rear side of the fin body 1. When the high-temperature flue gas flows through the fin body 1, the parts of the fin body 1 located on the left and right sides of the high-temperature flue gas along the flow direction of the high-temperature flue gas are the left and right sides of the fin body 1. The "front", "rear" and "left and right" involved in the full text are all based on this.

[0032] Since a portion of the heat of the high-temperature flue gas flowing through the fin body 1 is directly heat-exchanged with the heat exchange tube 10 to heat the cold water in the heat exchange tube 10, in the present application, a guide component is also provided on the fin body 1. When the high-temperature flue gas flows through the fin body 1, the guide component guides the high-temperature flue gas to flow toward the heat exchange hole, so that the high-temperature flue gas gathers on the periphery of the heat exchange tube 10 and fully contacts the heat exchange tube 10, thereby enabling the high-temperature flue gas to better exchange heat with the cold water in the heat exchange tube 10, reducing the heat loss of the high-temperature flue gas, improving the heat exchange capacity of the fin structure, and improving the heat exchange efficiency of the heat exchanger.

[0033] Since the high-temperature flue gas flowing through the fin body 1 is in direct contact with the fin body 1, part of the heat is absorbed by the fin body 1, and then directly contacts the outer wall of the heat exchange tube 10 through the inner wall of the heat exchange hole, exchanges heat with the heat exchange tube 10, and heats the cold water in the heat exchange tube 10. After the high-temperature flue gas exchanges heat with the cold water in the heat exchange tube 10, it flows out along the outer periphery of the heat exchange tube 10.

[0034] Therefore, in the present embodiment, the end of the heat exchange hole close to the high-temperature flue gas inflow is set as the air inlet end, and the end close to the high-temperature flue gas outflow is set as the air outlet end, and along the flow direction of the high-temperature flue gas, the cross-sectional area of ​​the air inlet end gradually increases, and the cross-sectional area of ​​the air outlet end gradually decreases, so that the outer contour of the heat exchange tube 10 is adapted to the heat exchange hole. When the high-temperature flue gas flows through the fin body 1, it flows along the outer periphery of the heat exchange tube 10, thereby increasing the contact area between the inner wall of the heat exchange hole and the outer wall of the heat exchange tube 10, and reducing the flow resistance of the high-temperature flue gas when it flows through the heat exchange tube 10, so that the high-temperature flue gas flows on the fin body 1 more smoothly.

[0035] Specifically, in the present embodiment, the heat exchange hole provided on the fin body 1 may be a circular hole, and the heat exchange tube 10 of the gas water heater is a circular tube whose outer contour matches the heat exchange hole, so that the heat exchange tube 10 passes through the heat exchange hole, so that when the high-temperature flue gas flows through the fin body 1, it flows along the periphery of the heat exchange tube 10, which not only increases the area for heat exchange between the fin body 1 and the heat exchange tube 10, but also makes the high-temperature flue gas flow on the fin body 1 smoother.

[0036] In this embodiment, the heat exchange holes provided on the fin body 1 can also be rectangular holes, and the heat exchange tube 10 of the gas water heater is a rectangular tube whose outer contour is adapted to the heat exchange hole. Compared with the round tube, the rectangular heat exchange tube 10 is adapted to the rectangular heat exchange hole, which can further increase the contact area between the inner wall of the heat exchange hole and the outer wall of the heat exchange tube 10, thereby increasing the area for heat exchange between the fin body 1 and the heat exchange tube 10, and improving the heat exchange capacity of the fin structure.

[0037] In this embodiment, the end faces of the air inlet and the air outlet are cambered surfaces, and along the direction of the high-temperature flue gas, the curvature of the cambered surface of the air inlet gradually decreases, and the curvature of the cambered surface of the air outlet gradually increases. The end faces of the air inlet and the air outlet of the heat exchange hole are both set as cambered surfaces. Since the curvature of the cambered surface of the air inlet of the heat exchange hole gradually decreases, and the curvature of the cambered surface of the air outlet of the heat exchange hole gradually increases, the flow speed of the high-temperature flue gas along the periphery of the heat exchange tube 10 can be further accelerated, thereby reducing the flow resistance of the high-temperature flue gas when it flows through the heat exchange tube 10, accelerating the flow speed of the high-temperature flue gas around the heat exchange tube 10, and making the high-temperature flue gas flow more smoothly on the fin body 1.

[0038] Specifically, in this embodiment, the heat exchange hole provided on the fin structure may be an elliptical hole, and the heat exchange tube 10 of the gas water heater is an elliptical tube whose outer contour matches the heat exchange hole. Compared with a round tube, the elliptical heat exchange tube 10 matches the elliptical heat exchange hole, which can not only increase the contact area between the inner wall of the heat exchange hole and the outer wall of the heat exchange tube 10, so that when the high-temperature flue gas flows through the fin body 1, the area for heat exchange between the fin body 1 and the heat exchange tube 10 is increased, and the heat exchange capacity of the fin structure is improved, but also the flow speed of the high-temperature flue gas around the heat exchange tube 10 can be further accelerated, so that the high-temperature flue gas flows more smoothly on the fin body 1.

[0039] Since in the present application, each fin body 1 is provided with a plurality of heat exchange holes, in actual implementation, the gas water heater may include a plurality of heat exchange tubes 10, and the plurality of heat exchange tubes 10 respectively penetrate the plurality of heat exchange holes on the fin body 1, thereby fixing the plurality of heat exchange tubes 10 on the box body 11, so that the high-temperature flue gas flowing through the fin body 1 can simultaneously exchange heat with the plurality of heat exchange tubes 10, and heat the cold water in the plurality of heat exchange tubes 10, thereby improving the heat exchange capacity of the fin structure, and further improving the heat exchange efficiency of the heat exchanger.

[0040] In this embodiment, the flow guide assembly includes a first flow guide flange 4 provided on the left and right sides of the fin body 1, a plurality of heat exchange holes are provided in the middle of the fin body 1, and the first flow guide flange 4 extends from the front side of the fin body 1 to the rear side of the fin body 1, so as to make the high-temperature flue gas converge toward the middle of the fin body 1. In this application, the flow guide assembly includes two first flow guide flanges 4, the two first flow guide flanges 4 are respectively provided on the left and right sides of the fin body 1, and the two first flow guide flanges 4 extend from the front side of the fin body 1 to the rear side of the fin body 1.

[0041] A plurality of heat exchange holes are arranged in the middle of the fin body 1, that is, a plurality of heat exchange tubes 10 are fixed in the middle of the fin body 1. When the high-temperature flue gas flows through the fin body 1, the first guide flanges 4 located on both sides of the fin body 1 guide the high-temperature flue gas, so that the high-temperature flue gas flows to the middle of the fin body 1 and converges toward the heat exchange tube 10 located in the middle of the fin body 1, thereby preventing the high-temperature flue gas from escaping from both sides of the fin body 1, making the high-temperature flue gas fully contact with the heat exchange tube 10, and further making the high-temperature flue gas better exchange heat with the cold water in the heat exchange tube 10, thereby reducing the heat loss of the high-temperature flue gas.

[0042] In this embodiment, a plurality of heat exchange holes are distributed in an array on the fin body 1, and the heat exchange holes include a front row of heat exchange holes 2 provided on the front side of the fin body 1, and a rear row of heat exchange holes 3 provided on the rear side of the fin body 1. In the above embodiment, it is mentioned that each fin body 1 is provided with a plurality of heat exchange holes, which can be respectively passed through by a plurality of heat exchange tubes 10, so that the plurality of heat exchange tubes 10 are fixed on the box body 11, so that the high-temperature flue gas flowing through the fin body 1 can exchange heat with the plurality of heat exchange tubes 10 at the same time. However, the plurality of heat exchange holes are distributed in a straight line horizontally or vertically on the fin body 1, which will result in a low space utilization rate of the fin body 1, thereby increasing the size of the fin body 1.

[0043] Therefore, in the present application, a plurality of heat exchange holes are distributed in an array on the fin body 1, thereby improving the space utilization of the fin body 1 and reducing the size of the fin body 1 under the premise of ensuring the number of heat exchange holes on the fin body 1. Since a plurality of heat exchange holes are distributed in an array on the fin body 1, that is, at least two rows and two columns of heat exchange holes are provided on the fin body 1, in the present application, the heat exchange holes at least include a front row of heat exchange holes 2 and a rear row of heat exchange holes 3, a row of heat exchange holes located on the front side of the fin body 1 is the front row of heat exchange holes 2, and a row of heat exchange holes located on the rear side of the fin body 1 is the rear row of heat exchange holes 3. When the high-temperature flue gas flows in from the front side of the fin body 1, it first flows through the heat exchange tube 10 fixed in the front row of heat exchange holes 2, then flows through the heat exchange tube 10 fixed in the rear row of heat exchange holes 3, and finally flows out from the rear side of the fin body 1.

[0044] In this embodiment, the flow guide assembly includes a second flow guide flange 5 provided on both sides of each front row heat exchange hole 2, and the second flow guide flange 5 guides the high-temperature flue gas flowing into the fin body 1, so as to make the high-temperature flue gas converge in the direction of each front row heat exchange hole 2. In the present application, the flow guide assembly includes a second flow guide flange 5, and each front row heat exchange hole 2 is provided with a second flow guide flange 5 on both sides. When the high-temperature flue gas flows through the fin body 1, the second flow guide flange 5 on both sides of the heat exchange hole guides the high-temperature flue gas, so that the high-temperature flue gas converges on the periphery of the heat exchange tube 10 located in the front row, so that the high-temperature flue gas is fully in contact with the heat exchange tube 10 located in the front row.

[0045] In the present application, the first guide flange 4 and the second guide flange 5 can be used alone or in combination. The specific implementation of the combination of the first guide flange 4 and the second guide flange 5 is as follows: when the high-temperature flue gas flows in from the front side of the fin body 1, the first guide flanges 4 located on both sides of the fin body 1 first guide the high-temperature flue gas to make the high-temperature flue gas flow toward the middle of the fin body 1; then the second guide flanges 5 located on both sides of the front row of heat exchange holes 2 continue to guide the high-temperature flue gas to make the high-temperature flue gas flow further toward the direction of the front row of heat exchange holes 2, so that the high-temperature flue gas can better contact with the heat exchange tubes 10 located in the front row, reduce the heat loss of the high-temperature flue gas, and then improve the heat exchange capacity of the fin structure and the heat exchange efficiency of the heat exchanger.

[0046] In this embodiment, the flow guide assembly includes a flow guide boss disposed between two adjacent rear heat exchange holes 3, and the flow guide boss guides the high-temperature flue gas flowing through the rear heat exchange holes 3 so as to make the high-temperature flue gas flow closely to the periphery of the rear heat exchange holes 3. In the previous embodiment, it is mentioned that at least two rows and two columns of heat exchange holes are disposed on the fin body 1, that is, at least two front heat exchange holes 2 and at least two rear heat exchange holes 3 are provided.

[0047] In the present application, the flow guide assembly includes a flow guide boss, which is arranged between two adjacent rear-row heat exchange holes 3. When the high-temperature flue gas flows through the front-row heat exchange holes 2 on the fin body 1 and then flows to the rear-row heat exchange holes 3, the flow guide boss located between the two adjacent rear-row heat exchange holes 3 guides the high-temperature flue gas flowing between the two adjacent rear-row heat exchange holes 3, so that the high-temperature flue gas flows closely to the outer periphery of the heat exchange tubes 10 fixed in the two rear-row heat exchange holes 3, so that the high-temperature flue gas is fully in contact with the heat exchange tubes 10 located in the rear row.

[0048] Since the first flow-guiding flange 4 extends from the front side of the fin body 1 to the rear side of the fin body 1, it can be foreseen that the first flow-guiding flange 4, the second flow-guiding flange 5 and the flow-guiding boss can be used individually, in combination of two, or in combination of three. When the first flow-guiding flange 4, the second flow-guiding flange 5 and the flow-guiding boss are used simultaneously, since the second flow-guiding flange 5 is located on both sides of the front row heat exchange holes 2 and the flow-guiding boss is located between the two adjacent rear row heat exchange holes 3, the flow-guiding boss is located on the rear side of the second flow-guiding flange 5.

[0049] In this embodiment, the flow guide boss includes a first boss 6 disposed between two adjacent rear-row heat exchange holes 3, and the front side surface of the first boss 6 and the adjacent left and right sides are provided with a first flow guide slope for guiding the high-temperature flue gas. In this application, the flow guide boss includes a first boss 6, the first boss 6 is disposed between two adjacent rear-row heat exchange holes 3, and the front side surface of the first boss 6 and the adjacent left and right sides are provided with a first flow guide slope.

[0050] When the high-temperature flue gas flows from the front row heat exchange holes 2 to the rear row heat exchange holes 3, part of the high-temperature flue gas flows between two adjacent rear row heat exchange holes 3. At this time, the first boss 6 located between the two adjacent rear row heat exchange holes 3 guides the high-temperature flue gas through the first guide slope, so that the high-temperature flue gas flows toward both sides of the first boss 6, so that the high-temperature flue gas flows closely to the periphery of the heat exchange tubes 10 fixed in the two rear row heat exchange holes 3, and then the high-temperature flue gas is fully in contact with the heat exchange tubes 10 located in the rear row.

[0051] In this embodiment, the guide boss also includes a second boss 7 disposed between two adjacent rear-row heat exchange holes 3, the second boss 7 is disposed on the rear side of the first boss 6, and the left and right sides of the second boss 7 are provided with a second guide slope for guiding the high-temperature flue gas. In the present application, a second boss 7 is also disposed between two adjacent rear-row heat exchange holes 3, and the second boss 7 is disposed on the rear side of the first boss 6.

[0052] Second guide slopes are provided on the left and right sides of the second boss 7. The high-temperature flue gas flowing between two adjacent rear-row heat exchange holes 3 is first guided by the first guide slope of the first boss 6 to make the high-temperature flue gas flow toward the heat exchange tubes 10 on both sides, and then guided by the second guide slope of the second boss 7 to make the high-temperature flue gas continue to flow toward the heat exchange tubes 10 on both sides, so that the guide boss has a better guiding effect on the high-temperature flue gas, thereby improving the heat exchange capacity of the fin structure and the heat exchange efficiency of the heat exchanger.

[0053] In this embodiment, the fin structure further includes a flow boss 8 disposed on the rear side of the fin body 1, and a flow channel is disposed in the flow boss 8, and the high-temperature flue gas flowing through the rear heat exchange holes 3 flows out of the fin body 1 from the flow channel. In the above embodiment, it is mentioned that the high-temperature flue gas flows in from the front side of the fin body 1 and flows out from the rear side of the fin body 1. Therefore, the fin body 1 of the present application is further provided with a flow boss 8, and a flow channel is disposed in the flow boss 8.

[0054] It can be foreseen that: on the fin body 1, the flow boss 8 is arranged on the rear side of the guide boss. When the high-temperature flue gas flows from the front row of heat exchange tubes 10 to the rear row of heat exchange tubes 10, the guide boss located between two adjacent heat exchange tubes 10 in the rear row guides the high-temperature flue gas, so that the high-temperature flue gas flows closely to the outer periphery of the rear row of heat exchange tubes 10; when the high-temperature flue gas flows through the rear row of heat exchange tubes 10, the flue gas after heat exchange can flow out of the fin body 1 through the flow channel in the flow boss 8, thereby accelerating the outflow of the flue gas after heat exchange.

[0055] In this embodiment, the fin body 1 is also provided with a welding rod installation hole 9, which is arranged on the periphery of the heat exchange hole and is used to fix the heat exchange tube 10 in the heat exchange hole. In this application, the fin body 1 is also provided with a welding rod installation hole 9, which is arranged on the periphery of the heat exchange hole and is connected to the heat exchange hole. When the heat exchange tube 10 passes through the heat exchange hole, a welding rod can be installed in the welding rod installation hole 9. After the welding rod is melted at high temperature, the welding rod welds the heat exchange tube 10 and the fin body 1 together, so that the heat exchange tube 10 is fixed on the fin body 1 more firmly.

[0056] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A heat exchanger fin structure, characterized in that: The invention comprises a fin body (1), a plurality of heat exchange holes arranged on the fin body (1), and a flow guide component arranged on the fin body (1); the heat exchange holes are used for allowing a heat exchange tube (10) to pass through and for limiting the heat exchange tube (10); high-temperature flue gas flows in from the front side of the fin body (1) and flows out from the rear side of the fin body (1); the flow guide component guides the high-temperature flue gas flowing through the fin body (1) so as to make the high-temperature flue gas converge in the direction of the plurality of heat exchange holes; the end of the heat exchange hole close to the high-temperature flue gas inflow is an air inlet end, and the end close to the high-temperature flue gas outflow is an air outlet end; along the flow direction of the high-temperature flue gas, the cross-sectional area of ​​the air inlet end gradually increases, and the cross-sectional area of ​​the air outlet end gradually decreases.

2. A heat exchanger fin structure as claimed in claim 1, characterized in that: The end faces of the air inlet end and the air outlet end are arc surfaces. Along the flow direction of the high-temperature flue gas, the curvature of the arc surface of the air inlet end gradually decreases, and the curvature of the arc surface of the air outlet end gradually increases.

3. A heat exchanger fin structure as claimed in claim 1, characterized in that: The flow guide assembly comprises a first flow guide flange (4) arranged on the left and right sides of the fin body (1); a plurality of heat exchange holes are arranged in the middle of the fin body (1); the first flow guide flange (4) extends from the front side of the fin body (1) to the rear side of the fin body (1) so as to allow high-temperature flue gas to converge toward the middle of the fin body (1).

4. A heat exchanger fin structure as claimed in claim 1, characterized in that: The plurality of heat exchange holes are distributed in an array on the fin body (1), and the heat exchange holes include a front row of heat exchange holes (2) arranged on the front side of the fin body (1), and a rear row of heat exchange holes (3) arranged on the rear side of the fin body (1).

5. A heat exchanger fin structure as claimed in claim 4, characterized in that: The flow guide component comprises second flow guide flanges (5) arranged on both sides of each of the front row heat exchange holes (2), and the second flow guide flanges (5) guide the high-temperature flue gas flowing into the fin body (1) so as to converge the high-temperature flue gas in the direction of each of the front row heat exchange holes (2).

6. A heat exchanger fin structure as claimed in claim 4, characterized in that: The flow guide component comprises a flow guide boss arranged between two adjacent rear heat exchange holes (3), and the flow guide boss guides the high-temperature flue gas flowing through the rear heat exchange holes (3) so as to make the high-temperature flue gas flow closely along the periphery of the rear heat exchange holes (3).

7. A heat exchanger fin structure as claimed in claim 6, characterized in that: The guide boss comprises a first boss (6) arranged between two adjacent rear-row heat exchange holes (3); the front side surface and adjacent left and right side surfaces of the first boss (6) are provided with a first guide slope for guiding high-temperature flue gas.

8. A heat exchanger fin structure as claimed in claim 7, characterized in that: The guide boss also includes a second boss (7) arranged between the two adjacent rear-row heat exchange holes (3), the second boss (7) being arranged on the rear side of the first boss (6), and the left and right side surfaces of the second boss (7) being provided with second guide slopes for guiding high-temperature flue gas.

9. A heat exchanger fin structure as claimed in claim 4, characterized in that: The fin structure also includes a flow boss (8) arranged on the rear side of the fin body (1), and a flow channel is arranged in the flow boss (8), and the high-temperature flue gas flowing through the rear row heat exchange holes (3) flows out of the fin body (1) through the flow channel.

10. A heat exchanger fin structure as claimed in claim 1, characterized in that: The fin body (1) is also provided with a welding rod mounting hole (9), which is arranged on the outer periphery of the heat exchange hole and is used to fix the heat exchange tube (10) in the heat exchange hole.

11. A gas water heater, characterized in that: It comprises a heat exchanger fin structure as described in any one of claims 1 to 10, and also comprises a box body (11), and the heat exchange tube (10), wherein a plurality of the fin bodies (1) are arranged in the box body (11), and the heat exchange tube (10) extends out from one side of the box body (11) after sequentially penetrating through a plurality of the fin bodies (1), and the outer contour of the heat exchange tube (10) is adapted to the heat exchange hole.

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