Heat exchange fin, heat exchanger, water tank assembly and gas water heater

Abstract

The invention discloses a heat exchange fin, a heat exchanger, a water tank assembly and a gas water heater, the heat exchange fin comprises a fin main body, a turbulent flow structure and a guide structure, the fin main body has a thickness direction and is provided with a plurality of pipe passing holes penetrating in the thickness direction, and the pipe passing holes are used for allowing a main heat exchange pipe set to penetrate through; the fin body is provided with an inflow end and an outflow end in the smoke inlet direction. The turbulent flow structure is connected to the surface of one side, in the thickness direction, of the fin body and used for blocking part of smoke flowing to the outflow end. The guide structure is connected to the fin body, the guide structure and the turbulent flow structure are located on the same surface of the fin body, and the guide structure is located on the side, close to the inflow end, of the turbulent flow structure and used for guiding smoke to the turbulent flow structure. According to the technical scheme, the residence time of smoke on the heat exchange fins can be prolonged, so that the heat exchange efficiency between the heat exchange fins and the heat exchange pipes is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas water heaters, and in particular to a heat exchange fin, a heat exchanger, a water tank assembly, and a gas water heater. BACKGROUND

[0002] The high-temperature flue gas generated by the burner of the gas water heater exchanges heat with the heat exchange liquid in the heat exchange pipe to heat the heat exchange liquid.

[0003] The heat exchanger usually has a heat exchange fin that improves the heat exchange efficiency of the heat exchange pipe and the flue gas. Specifically, the heat exchange pipe is arranged in the heat exchange fin to increase the contact area with the flue gas and thus improve the heat exchange efficiency.

[0004] However, in the related art, the residence time of the flue gas on the heat exchange fin is short, which results in low heat exchange efficiency of the heat exchange pipe and the heat exchange fin, and thus affects the heat exchange efficiency between them. SUMMARY

[0005] The embodiments of the present application provide a heat exchange fin, a heat exchanger, a water tank assembly, and a gas water heater, which can prolong the residence time of the flue gas on the heat exchange fin to improve the heat exchange efficiency between the heat exchange fin and the heat exchange pipe.

[0006] In a first aspect, the embodiments of the present application provide a heat exchange fin, which comprises:

[0007] a fin body having a thickness direction and provided with a plurality of pipe holes penetrating through the thickness direction, the pipe holes being used for arranging a main heat exchange pipe group, the fin body having an inflow end and an outflow end along a flue gas inflow direction;

[0008] a spoiler structure connected to one side surface of the fin body along the thickness direction, and used for blocking part of the flue gas flowing to the outflow end; and

[0009] a guide structure connected to the fin body and located on the same surface of the fin body as the spoiler structure, the guide structure being located on one side of the spoiler structure close to the inflow end, and used for guiding the flue gas to the spoiler structure.

[0010] In some embodiments, the guide structure is an arch structure, and a flow guide channel extending along the flue gas inflow direction is formed in the arch structure, and the spoiler structure is located at the outlet of the flow guide channel.

[0011] In some embodiments, the cross section of the flow guide channel is gradually reduced from the inflow end to the outflow end.

[0012] In some embodiments, the fin body is provided with a first smoke passage opening on a surface thereof facing away from the guide structure and communicating with the flow guide channel.

[0013] In some embodiments, the spoiler structure comprises a spoiler ring and a spoiler plate arranged in sequence along the smoke inlet direction, and the length extension direction of the spoiler plate is arranged at an angle to the smoke inlet direction.

[0014] In some embodiments, the projection of the spoiler ring along the smoke inlet direction is located within the spoiler plate.

[0015] In some embodiments, the fin body is provided with a second smoke passage opening on a surface thereof facing away from the guide structure and communicating with the inner ring of the spoiler ring.

[0016] In some embodiments, the heat exchange fin further comprises an enclosing member connected to one side surface of the fin body in the thickness direction and arranged in a circumferential manner around the through-hole.

[0017] In some embodiments, the spoiler structure and the guide structure are each provided with a plurality of structures, and one of the guide structures is located on one side of one of the spoiler structures close to the inflow end.

[0018] In a second aspect, the embodiments of the present application provide a heat exchanger, which comprises:

[0019] The heat exchange fin as described above; and

[0020] A main heat exchange tube group and a condensation tube group, which are arranged in sequence along the smoke inlet direction, and the main heat exchange tube group is arranged through the through-hole.

[0021] In a third aspect, the embodiments of the present application provide a water tank assembly, which comprises:

[0022] A tank body having a flue gas cavity; and

[0023] The heat exchanger as described above is arranged in the flue gas cavity.

[0024] In some embodiments, the tank body is provided with a condensation water inlet box and a condensation water outlet box, and the condensation tube group comprises a plurality of condensation tubes, and two ends of each condensation tube are respectively communicated with the condensation water inlet box and the condensation water outlet box, so that the plurality of condensation tubes are arranged in parallel.

[0025] In some embodiments, the condensation water inlet box and the condensation water outlet box are arranged on the same side wall of the tank body.

[0026] In some embodiments, the box comprises a first side wall and a second side wall arranged oppositely along the smoke inlet direction, the first side wall is provided with a first main heat exchange water box, the second side wall is provided with a second main heat exchange water box, the main heat exchange pipe group comprises a plurality of first main heat exchange pipes, two ends of the plurality of first main heat exchange pipes are in communication with the first main heat exchange water box and the second main heat exchange water box respectively.

[0027] And one end of at least one of the first main heat exchange pipes is in communication with the condensation water inlet box.

[0028] In some embodiments, the first main heat exchange water box and the second main heat exchange water box each comprise a plurality of, and one first main heat exchange pipe corresponds to one first main heat exchange water box and one second main heat exchange water box in communication, so that a plurality of first main heat exchange pipes are connected in series to form a series water circuit.

[0029] In some embodiments, along the smoke inlet direction, a plurality of first main heat exchange pipes are provided with at least two rows, and two rows of first main heat exchange pipes are arranged in staggered arrangement.

[0030] In some embodiments, the box further comprises a third side wall and a fourth side wall arranged oppositely along the smoke inlet direction, the third side wall and the fourth side wall are located between the first side wall and the second side wall, and the box further has a smoke inlet port in communication with the flue gas cavity.

[0031] The first side wall is further provided with a third main heat exchange water box, the second side wall is further provided with a fourth main heat exchange water box, the main heat exchange pipe group further comprises a plurality of second main heat exchange pipes, the plurality of second main heat exchange pipes are located on one side of the plurality of first main heat exchange pipes close to the smoke inlet port, opposite ends of the plurality of second main heat exchange pipes are in communication with the third main heat exchange water box and the fourth main heat exchange water box respectively, and at least one second main heat exchange pipe is in communication with the first main heat exchange water box.

[0032] The plurality of second main heat exchange pipes are arranged on the third side wall and the fourth side wall respectively.

[0033] In some embodiments, the radial cross section of the first main heat exchange pipe and / or the second main heat exchange pipe is elliptical, and the major axis of the ellipse extends along the smoke inlet direction.

[0034] In a fourth aspect, the embodiments of the present application provide a gas water heater, which comprises a shell;

[0035] The water tank assembly as described above is arranged in the shell; and

[0036] A burner is arranged in the shell and can generate flue gas flowing to the flue gas cavity.

[0037] The heat exchange fin, the heat exchanger, the water tank assembly and the gas water heater based on the embodiment of the present application have the following technical effects:

[0038] Thus, the guide structure can accurately guide a large amount of flue gas to the spoiler structure through the above layout. Then, the spoiler structure effectively slows down the tendency of the flue gas flowing directly to the outflow end by its blocking effect, forcing the flue gas to produce more complex turbulent flow and mixing phenomena around the fin body. In this process, the contact area between the flue gas and the fin body is significantly expanded, and the contact time is also extended, providing more opportunities for heat exchange. Heat freely shuttles between the flue gas and the fin body, achieving efficient and uniform transfer, greatly improving the heat exchange efficiency. Therefore, the heat exchange fin of the embodiment promotes the full exchange of heat in the flue gas, thereby greatly improving the heat transfer efficiency in the heat exchange process. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without creative labor.

[0040] Figure 1 The structure schematic diagram of an embodiment of the water tank assembly of the present application;

[0041] Figure 2 The structure schematic diagram of the heat exchange fin of the heat exchanger of the water tank assembly of the present application; Figure 2 The sectional view along A-A section;

[0042] Figure 3 The structure schematic diagram of the heat exchange fin of the heat exchanger of the water tank assembly of the present application;

[0043] Figure 4 The structure schematic diagram of the heat exchange fin of the heat exchanger of the present application;

[0044] Figure 5 The structure schematic diagram of the heat exchange fin of the heat exchanger of the present application; Figure 4 The local enlarged view of A;

[0045] Figure 6 The structure schematic diagram of the heat exchange fin of the heat exchanger of the present application from another perspective;

[0046] Figure 7 The structure schematic diagram of the condenser pipe group of the water tank assembly of the present application;

[0047] Figure 8 Figure 7 is a structural schematic view of the water tank assembly from another perspective.

[0048] Brief Description of the Drawings

[0049] 1. water tank assembly; 10. tank body; 11. first side wall; 111. first main heat exchange water box; 112. third main heat exchange water box; 12. second side wall; 121. second main heat exchange water box; 122. fourth main heat exchange water box; 13. third side wall; 14. fourth side wall; 10A. flue gas cavity; 10B. flue gas inlet; 10C. flue gas outlet; 10a. condensation water inlet box; 10b. condensation water outlet box; 10c. water inlet; 10d. water outlet;

[0050] 20. heat exchanger; 21. main heat exchange tube group; 211. first main heat exchange tube; 212. second main heat exchange tube; 22. condensation tube group; 221. condensation tube; 2211. straight section; 2212. curved section; 23. heat exchange fin; 231. fin body; 231A. inflow end; 231B. outflow end; 2311. first flue gas passing port; 2312. second flue gas passing port; 2313. passing tube hole; 232. turbulence structure; 2321. turbulence ring; 2322. turbulence plate; 233. guide structure; 233A. guide channel; 234. enclosing member.

[0051] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application with reference to the accompanying drawings.

[0053] The following description relates to the accompanying drawings, unless otherwise indicated, the same reference numbers in different drawings represent the same or similar elements. The embodiments described in the following example embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0054] In the description of the present application, it should be understood that the terms "first", "second" and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise stated, "multiple" means two or more. "And / or", the association between the associated objects, means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B, and the existence of B alone. The character " / " generally represents that the associated objects before and after are a kind of "or" relationship.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0056] The application provides a gas water heater. In the embodiments of the application, the gas water heater can heat fuel by burning to obtain high-temperature flue gas with a high temperature, and then heat-exchange the high-temperature flue gas with cold water, so that the heat of the high-temperature flue gas can be transferred to the cold water, and the cold water is heated to prepare hot water, i.e., the required bath water.

[0057] It can be understood that the gas water heater can mix fuel gas and air, and use the mixed gas as fuel to achieve full combustion of the fuel. Specifically, the fuel gas and air can be premixed according to a specific combustion ratio to become the required fuel, and then the fuel is ignited to generate high-temperature flue gas. In this way, a more efficient energy conversion and a lower flue gas emission combustion process, i.e., the so-called full premixing technology, can be achieved. Of course, the fuel can also be fuel gas only, which is not limited in the embodiments.

[0058] Please refer to Figure 1 In the embodiments, the gas water heater includes a shell (not shown in the drawings), a water tank assembly 1, and a burner (not shown in the drawings). The shell is used to carry and install various components of the gas water heater. The water tank assembly 1 and the burner are arranged in the shell, and the water tank assembly 1 has a flue gas cavity 10A.

[0059] The fuel can be sent into the burner, ignited by the burner to obtain high-temperature flue gas, and then the high-temperature flue gas flows into the flue gas cavity 10A to exchange heat with the water flowing through the water tank assembly 1, so that the water is heated to prepare the required hot water.

[0060] Please refer to Figure 1 and Figure 2 In the embodiments, the water tank assembly 1 includes a tank body 10 and a heat exchanger 20. The tank body 10 can be made of stainless steel, which has the advantages of better corrosion resistance, better anti-fouling property, and lower cost. Of course, the tank body 10 can also be made of copper, which is not limited in the embodiments. The tank body 10 can be configured in a cuboid or a cube structure, so that the shape is regular to facilitate manufacturing. The tank body 10 has the flue gas cavity 10A described above.

[0061] The heat exchanger 20 is arranged in the flue gas cavity 10A, and the heat exchanger 20 comprises a main heat exchange pipe group 21 and a condensing pipe group 22, which are arranged in sequence along the flue gas inlet direction.

[0062] The main heat exchange pipe group 21 and the condensing pipe group 22 can be made of stainless steel or copper and the like. Taking the stainless steel as an example, the main heat exchange pipe group 21 and the condensing pipe group 22 have the advantages of better corrosion resistance, better anti-fouling property and lower cost. Liquid flow channels are formed in the main heat exchange pipe group 21 and the condensing pipe group 22 for the flow of heat exchange liquid. It can be understood that when the high-temperature flue gas flows through the main heat exchange pipe group 21 and the condensing pipe group 22, it will contact the main heat exchange pipe group 21 and the condensing pipe group 22 to transfer heat to the main heat exchange pipe group 21 and the condensing pipe group 22, and then the heat is further transferred to the heat exchange liquid through the heat exchange between the main heat exchange pipe group 21 and the condensing pipe group 22 and the heat exchange liquid.

[0063] With reference to Figures 2 to 4 In order to further improve the heat exchange efficiency of the heat exchanger 20 and the high-temperature flue gas, the heat exchanger 20 further comprises heat exchange fins 23 in the embodiment. The heat exchange fins 23 can be made of copper to have the advantage of better heat conduction performance. Of course, the heat exchange fins 23 can also be made of other metal materials such as stainless steel, which is not limited in the embodiment.

[0064] However, the residence time of the flue gas on the heat exchange fins 23 is short, which leads to a low heat exchange efficiency of the heat exchange pipe and the heat exchange fins 23, and further affects the heat exchange efficiency between them.

[0065] Based on this, in the embodiment, the heat exchange fins 23 comprise fin bodies 231, turbulence structures 232 and guide structures 233.

[0066] The fin body 231 is a main part of the heat exchange fin 23, which can be arranged in a substantially rectangular shape, so that the fin body 231 can have a thickness direction, a width direction and a length direction perpendicular to each other in pairs. In the smoke inlet direction, the fin body 231 has an inflow end 231A and an outflow end 231B, and the inflow end 231A and the outflow end 231B are arranged in the width direction in turn. The fin body 231 is provided with a plurality of through holes 2313 penetrating in the thickness direction, and the through holes 2313 are used for penetrating the main heat exchange pipe group 21, that is, the first main heat exchange pipe 211 can be penetrated in a through hole 2313, so as to ensure the positional stability of the first main heat exchange pipe 211 and the fin body 231. It should be noted that when the first main heat exchange pipe 211 is an elliptical pipe, the through hole 2313 is an elliptical hole. In this way, not only the stable positional relationship between the heat exchange pipe and the fin body 231 is ensured, but also the heat conduction efficiency is greatly improved, so that the heat can be more efficiently transmitted to the surrounding medium through the fin body 231. It can be understood that the heat exchange fin 23 is provided in plurality, and the plurality of heat exchange fins 23 are arranged in the axial direction of the first main heat exchange pipe 211 in turn, so as to further improve the smoke retention time.

[0067] The spoiler structure 232 is connected to one side surface of the fin body 231 in the thickness direction, so as to block part of the smoke flowing to the outflow end 231B; the guide structure 233 is connected to the fin body 231 and located on the same surface of the fin body 231 as the spoiler structure 232, and the guide structure 233 is located on the side of the spoiler structure 232 close to the inflow end 231A, so as to guide the smoke to the spoiler structure 232.

[0068] The spoiler structure 232 is connected to one side surface of the fin body 231 in the thickness direction, and the guide structure 233 is connected to the fin body 231 and located on the same surface of the fin body 231 as the spoiler structure 232. Among them, the spoiler structure 232 and the guide structure 233 can be an integral structure with the fin body 231, so as to ensure the structural strength of the spoiler structure 232 and the guide structure 233, and ensure that the spoiler structure 232 and the guide structure 233 can maintain good form and function under complex working conditions.

[0069] In the present application, the guide structure 233 is located on the side of the spoiler structure 232 close to the inflow end 231A, the guide structure 233 guides the smoke to the spoiler structure 232, and the spoiler structure 232 blocks part of the smoke flowing to the outflow end 231B. So that the heat exchange fin 23 of the present embodiment has at least the following technical effects:

[0070] Thus, the guide structure 233 can accurately guide a large amount of flue gas to the spoiler structure 232 through the above layout. Then, the spoiler structure 232 effectively slows down the direct flow of the flue gas to the outlet end 231B by its blocking effect, forcing the flue gas to produce more complex turbulent flow and mixing phenomena around the fin body 231. In this process, the contact area between the flue gas and the fin body 231 is significantly expanded, and the contact time is also prolonged, providing more opportunities for heat exchange. Heat freely shuttles between the flue gas and the fin body 231, achieving efficient and uniform heat transfer, greatly improving the heat exchange efficiency. Therefore, the heat exchange fin 23 of the embodiment promotes the full exchange of heat in the flue gas, thereby greatly improving the heat and mass transfer efficiency in the heat exchange process.

[0071] In combination with reference to Figure 5 In some structural forms, the guide structure 233 is an arched structure, and a guide channel 233A extending in the flue gas inlet direction is formed in the arched structure, and the spoiler structure 232 is located at the outlet of the guide channel 233A. In this way, the guide structure 233 is designed as an arched structure, compared with the traditional scheme of setting a guide plate, the guide channel 233A naturally formed inside the arched structure is highly consistent with the shape of the flue gas flow direction, which can effectively guide the flue gas to flow along the predetermined path, reducing the resistance and turbulence of the flue gas in the flow process, thereby improving the heat exchange efficiency. In contrast, although the traditional guide plate can also guide the flue gas, its shape is often relatively simple and difficult to fully adapt to the complex flue gas flow characteristics, resulting in relatively low heat exchange efficiency.

[0072] In addition, the arched structure is provided with a spoiler structure 232 at the outlet of the guide channel 233A to ensure that the flue gas flows out of the outlet of the guide channel 233A and is directed to the spoiler structure 232. Through the action of the spoiler structure 232, part of the flue gas produces strong turbulent flow and mixing effect around the fin body 231, thereby greatly increasing the contact area and contact time between the flue gas and the fin body 231, promoting the in-depth process of heat transfer. This design not only improves the efficiency of heat exchange, but also makes the heat exchange process more uniform and stable.

[0073] Further, the cross section of the guide channel 233A gradually decreases from the inlet end 231A to the outlet end 231B. In this way, as the cross section gradually decreases, the flue gas will gradually accelerate during the flow process, forming a kind of "jet" effect, which helps to enhance the heat and mass exchange between the flue gas and the fin body 231. At the same time, the gradually tapered cross section also promotes the uniform distribution of flue gas in the guide channel 233A, reduces the vortex and dead zone caused by uneven flow velocity, and improves the heat exchange efficiency. In addition, this design also helps to reduce the energy loss of flue gas in the flow process, so that more energy can be effectively utilized in the heat exchange process.

[0074] Optionally, the surface of the fin body 231 away from the guide structure 233 is provided with a first smoke passing opening 2311 communicating with the flow guide channel 233A. In this way, the smoke away from the surface of the fin body 231 can also flow into the flow guide channel 233A through the first smoke passing opening 2311, so that more smoke flows to the spoiler structure 232. Such a design not only increases the contact area between the smoke and the fin body 231, but also prolongs the residence time of the smoke around the fin body 231, providing more opportunities for heat transfer. At the same time, since more smoke is directed to the spoiler structure 232, the blocking and mixing effects of the spoiler structure 232 are also more fully exerted, further promoting the exchange of heat in the smoke and the fin body 231.

[0075] In some embodiments, the spoiler structure 232 includes a spoiler ring 2321 and a spoiler plate 2322 arranged in sequence along the smoke inlet direction, and the length extension direction of the spoiler plate 2322 is arranged at an angle to the smoke inlet direction. In this way, after the smoke flows to the spoiler ring 2321, it will flow along the peripheral wall of the spoiler ring 2321 to effectively block and guide the incoming smoke, prolonging the residence time of the smoke. The spoiler plate 2322 that follows, with its length extension direction arranged at an angle to the smoke inlet direction, can make full use of the flow energy of the smoke to guide the smoke to produce more complex and turbulent flow and mixing phenomena around the fin body 231. Such complex flow state not only increases the contact area and contact time between the smoke and the fin body 231, but also promotes the uniformity and efficiency of heat transfer. Therefore, the combination of the spoiler ring 2321 and the spoiler plate 2322 in the spoiler structure 232, as well as the angle between the spoiler plate 2322 and the smoke inlet direction, together form an efficient and stable heat exchange system.

[0076] Further, the projection of the spoiler ring 2321 along the smoke inlet direction is located within the spoiler plate 2322. This layout helps to reduce the energy loss of the smoke during flow. Since the spoiler ring 2321 and the spoiler plate 2322 cooperate closely, the smoke can maintain a high flow rate and low resistance when passing through this area, thereby reducing energy dissipation caused by uneven flow rate or vortex.

[0077] Referring to Figures 4 to 6Optionally, the surface of the fin body 231 away from the guide structure 233 is provided with a second smoke passage 2312 communicating with the inner ring of the spoiler ring 2321. In this way, the smoke that would have directly swept past the back of the fin body 231 is redirected and smoothly flows into the inner ring area of the spoiler ring 2321 through the second smoke passage 2312. Such a layout arrangement is essentially a careful planning of the smoke flow path, which not only widens the interface between the smoke and the fin body 231, but also significantly prolongs the residence time of the smoke around the fin body 231. In this process, the heat exchange between the smoke and the fin body 231 is more fully carried out, and the efficiency and effect of heat transfer are significantly improved. Therefore, the addition of the second smoke passage 2312 not only enhances the heat exchange performance of the fin structure, but also makes the entire heat exchange process more efficient and stable.

[0078] Referring to Figures 4 to 6 In some embodiments, the heat exchange fin 23 further comprises a surrounding member 234 connected to one side surface of the fin body 231 in the thickness direction and arranged around the circumference of the tube hole 2313. The surrounding member 234 can be an integral structure with the fin body 231 to ensure the structural strength of the surrounding member 234. By providing the surrounding member 234, the contact area between the first main heat exchange tube 211 and the fin body 231 can be directly and effectively increased. With the significant increase in the contact area, the heat transfer between the first main heat exchange tube 211 and the fin body 231 becomes more efficient and direct. During the heat exchange process, more heat is quickly and fully exchanged between the two, thereby significantly improving the overall heat exchange efficiency. This design not only optimizes the performance of the heat exchange fin 23, but also enables the entire heat exchange system to achieve the desired heat exchange effect in a shorter time, meeting the user's demand for efficient and energy-saving hot water supply.

[0079] Optionally, the spoiler structure 232 and the guide structure 233 are each provided with a plurality of guide structures 233 corresponding to one side of the spoiler structure 232 close to the inflow end 231A. In this way, the flow field organization inside the heat exchange fin 23 is enhanced, and the guidance and orderliness of the smoke flow are significantly improved. With the inflow of smoke, each guide structure 233 can play its guiding role to smoothly guide the smoke to the corresponding spoiler structure 232, effectively avoiding the disorder and energy loss during the flow of smoke. At the same time, the presence of multiple spoiler structures 232 further intensifies the disturbance and mixing of smoke around the fin body 231, making the heat transfer process more complete and efficient. This design not only increases the contact area between the smoke and the fin body 231, but also promotes the rapid exchange of heat between the smoke and the fin, thereby improving the overall heat exchange efficiency.

[0080] In some embodiments, referring to Figure 7, the condensing pipe group 22 comprises a plurality of condensing pipes 221 arranged in sequence along the smoke inlet direction, and each condensing pipe 221 extends in a direction forming an angle with the smoke inlet direction. In this way, the water tank assembly 1 of the embodiment has at least the following technical effects:

[0081] Firstly, the arrangement and bending form of the condensing pipe 221 enable the flue gas to contact the surface of the condensing pipe 221 more fully during flow, prolonging the heat exchange path and time. Due to the increase in contact area, the heat energy in the flue gas can be more fully absorbed by the condensing pipe 221 and transferred to the water, reducing the waste and loss of heat energy and improving the heat exchange efficiency. At the same time, the curved path of the condensing pipe 221 helps to guide the flue gas to be more evenly distributed on the pipe surface, reducing local overheating and the formation of deposits. Therefore, the water tank assembly 1 of the embodiment not only ensures efficient heat exchange, but also optimizes energy utilization efficiency, providing a more energy-saving and efficient hot water use experience.

[0082] In some structural forms, the box body 10 has a first direction and a second direction arranged vertically with the smoke inlet direction, and the first direction and the second direction are arranged at an angle. It can be understood that when the box body 10 is arranged in a cubic structure, the smoke inlet direction is the height direction of the box body 10, and the first direction and the second direction are the length direction and the width direction of the box body 10, respectively. The condensing pipe 221 comprises a plurality of straight sections 2211 and a plurality of curved sections 2212, the straight sections 2211 extend along the first direction, and the plurality of straight sections 2211 are arranged at intervals along the second direction, and the curved sections 2212 are connected to adjacent straight sections 2211. In this way, a more regular structure is arranged to further increase the contact area.

[0083] Alternatively, along the smoke inlet direction, the two adjacent condensing pipes 221 are at least partially arranged in a staggered manner. Such staggered arrangement not only increases the relative surface area between the condensing pipes 221, so that the flue gas can contact the condensing pipes 221 more fully when passing through, thereby improving the heat exchange efficiency, but also enhances the stability and durability of the entire system. The staggered arrangement design helps to disperse the impact force of the flue gas flow, reducing direct wear and tear on the condensing pipes 221, prolonging the service life of the equipment. At the same time, this layout also improves the compactness of the structure, so that more condensing pipes 221 can be accommodated in a limited space, thereby improving the overall heat treatment capacity and efficiency. In addition, the staggered arrangement of the condensing pipes 221 also optimizes the airflow channel, so that the flue gas can form a more complex and variable flow pattern during flow, further promoting heat transfer and exchange.

[0084] In some embodiments, the condensing pipes 221 are corrugated pipes. It can be understood that the corrugated pipes have a corrugated structure formed on the pipe wall, through which the heat exchange area of the corrugated pipe with the high-temperature flue gas can be increased, thereby improving the heat exchange efficiency of the corrugated pipe with the high-temperature flue gas, and the corrugated pipe is lighter in weight and lower in material cost.

[0085] With reference to Figure 1 and Figure 8 In some embodiments, the box 10 is provided with a condensing water inlet box 10a and a condensing water outlet box 10b, and the two ends of each condensing pipe 221 are respectively communicated with the condensing water inlet box 10a and the condensing water outlet box 10b, so that the plurality of condensing pipes 221 are arranged in parallel. In this way, the plurality of condensing pipes 221 can work in parallel and jointly undertake the task of heat exchange. Compared with the traditional series waterway form, the significant advantage is that it can significantly improve the overall water flow. Since the parallel structure allows water to flow in multiple channels at the same time, water resources can be more effectively utilized, and heat exchange efficiency can be improved. At the same time, since the temperature of the condensing pipe 221 is generally lower than that of the main heat exchange pipe group 21 during operation, there is no need to worry too much about the risk of vaporization of water flow in the condensing pipe 221 due to excessively high temperature. This feature not only ensures the stable operation of the system, but also reduces the energy loss and safety hazards that may be caused by vaporization.

[0086] Further, the condensing water inlet box 10a and the condensing water outlet box 10b are arranged on the same side wall of the box 10. In this way, this layout not only optimizes the internal space structure, but also greatly improves the convenience of the installation process. During installation, there is no need to shuttle between multiple side walls of the box 10, but only need to focus on the same side wall, so that the installation and debugging work of the water inlet and outlet boxes of the condensing pipes 221 can be easily completed, which significantly saves the installation time, reduces the installation difficulty, and also reduces the potential failure risk caused by improper operation, thereby improving the use efficiency of the overall water tank assembly 1.

[0087] Optionally, the box 10 comprises a first side wall 11 and a second side wall 12 arranged opposite to each other along the smoke inlet direction, the first side wall 11 is provided with a first main heat exchange water box 111, and the second side wall 12 is provided with a second main heat exchange water box 121. The main heat exchange pipe group 21 comprises a plurality of first main heat exchange pipes 211, and the two ends of the plurality of first main heat exchange pipes 211 are respectively communicated with the first main heat exchange water box 111 and the second main heat exchange water box 121. In this way, the plurality of first main heat exchange pipes 211 connects the first main heat exchange water box 111 and the second main heat exchange water box 121 to form a heat exchange path. The plurality of first main heat exchange pipes 211 can be arranged in a straight pipe manner, so that the processing is more simple. And one end of at least one first main heat exchange pipe 211 is communicated with the condensation water inlet box 10a. In this process, the heat exchange liquid is smoothly exchanged between the main heat exchange pipe, the first main heat exchange water box 111 and the second main heat exchange water box 121, and the heat is effectively transferred and released. When the heat exchange liquid completes the preliminary heat exchange, it flows to the condensation water inlet box 10a along at least one first main heat exchange pipe 211 to further perform the heat exchange process in the plurality of condensation pipes 221. Such design not only improves the heat exchange efficiency of the whole system, but also maximizes the utilization of the heat exchange liquid and reduces the waste of energy. It should be noted that the condensation water inlet box 10a and the condensation water outlet box 10b can be arranged on the first side wall 11 or the second side wall 12 at the same time to facilitate the same processing.

[0088] Further, the first main heat exchange water box 111 and the second main heat exchange water box 121 each comprise a plurality of first main heat exchange pipes 211, and one first main heat exchange pipe 211 corresponds to one first main heat exchange water box 111 and one second main heat exchange water box 121 to form a series water path. In this way, compared with the parallel water path, the series water path can avoid the phenomenon of empty pipe or water flow accumulation in the first main heat exchange pipe 211 due to the small flow and slow flow of the heat exchange liquid in the first main heat exchange pipe 211, thereby slowing down the water vaporization and scaling in the first main heat exchange pipe 211, effectively reducing the risk of damage to the first main heat exchange pipe 211, prolonging the service life of the main heat exchange pipe group 21, and avoiding the explosion of the water tank assembly 1, thereby ensuring the safety of the water tank assembly 1.

[0089] In combination with reference Figure 2 and Figure 3 Optionally, along the smoke inlet direction, the plurality of first main heat exchange pipes 211 are arranged in at least two rows, and the two rows of first main heat exchange pipes 211 are arranged in a staggered manner. In this way, the staggered arrangement of the first main heat exchange pipes 211 enables the smoke to contact the first main heat exchange pipes 211 more fully when flowing through, thereby increasing the heat exchange area and promoting the effective transfer of heat. At the same time, such layout also helps to reduce the vortex and dead angle in the smoke flow, thereby improving the uniformity of the smoke flow and the uniformity of the heat exchange.

[0090] Referring to Figure 1 and Figure 8 Optionally, the box 10 further comprises a third side wall 13 and a fourth side wall 14 arranged opposite to each other along the smoke inlet direction, both of which are located between the first side wall 11 and the second side wall 12. The box 10 also has a smoke inlet 10B and a smoke outlet 10C, both of which are in communication with the smoke cavity 10A. Among them, an exemplary case is that the smoke inlet 10B and the smoke outlet 10C are the same opening, that is, the smoke changes the flow direction when flowing into the smoke cavity 10A from the smoke inlet 10B and flows out from the smoke outlet 10C after flowing to the bottom wall of the smoke cavity 10A, thereby the smoke inlet 10B and the smoke outlet 10C are the same opening. Another exemplary case is that the smoke inlet 10B and the smoke outlet 10C are located on opposite sides of the box 10, so that the smoke flowing into the smoke cavity 10A from the smoke inlet 10B does not change the flow direction and flows out along the smoke outlet 10C, thereby the smoke inlet 10B and the smoke outlet 10C are different openings.

[0091] The first side wall 11 is also provided with a third main heat exchange water box 112, and the second side wall 12 is also provided with a fourth main heat exchange water box 122. The main heat exchange pipe group 21 further comprises a plurality of second main heat exchange pipes 212, which are located on the side of the plurality of first main heat exchange pipes 211 close to the smoke inlet 10B. The opposite ends of the plurality of second main heat exchange pipes 212 are in communication with the third main heat exchange water box 112 and the fourth main heat exchange water box 122, respectively, and at least one second main heat exchange pipe 212 is in communication with the first main heat exchange water box 111. The plurality of second main heat exchange pipes 212 are arranged on the third side wall 13 and the fourth side wall 14, respectively.

[0092] In this way, the plurality of second main heat exchange pipes 212 are carefully arranged on the third side wall 13 and the fourth side wall 14. This arrangement skillfully avoids blocking the flow of smoke to the first main heat exchange pipes 211, ensuring smooth and efficient flow of smoke. At the same time, such a layout also promotes the uniformity and stability of the heat exchange process, so that each main heat exchange pipe group 21 can fully exert its heat exchange efficiency, avoiding the problem of local overheating or uneven cooling.

[0093] When the high-temperature smoke flows into the box 10 from the smoke inlet 10B, it will first encounter the plurality of second main heat exchange pipes 212 and undergo preliminary heat exchange, which effectively reduces the temperature of the smoke and lays a good foundation for subsequent cooling and heat recovery. Subsequently, the preliminarily cooled smoke will continue to flow through the plurality of first main heat exchange pipes 211 for deeper heat exchange, achieving efficient heat transfer and utilization. In the entire heat exchange process, both the first main heat exchange pipes 211 and the second main heat exchange pipes 212 fully play their due roles and work together to complete the task of cooling and heat recovery of high-temperature smoke.

[0094] Referring to Figure 1 and Figure 8 Further, the box 10 also has a water inlet 10c and a water outlet 10d, wherein the water inlet 10c is in communication with the condensation water inlet box 10a, and the water outlet 10d is in communication with the fourth main heat exchange water pipe. In this way, the heat exchange liquid can flow in the path of the water inlet 10c, the condensation pipe group 22, the main heat exchange pipe group 21 and the water outlet 10d in sequence, so as to realize the circulation of the heat exchange liquid in the main heat exchange pipe group 21 and the condensation pipe group 22, so as to improve the heat utilization rate of the flue gas. The condensation water inlet box 10a and the fourth main heat exchange water pipe are located on the same side of the box 10, so as to facilitate the connection with the external pipeline.

[0095] Further, the radial section of the first main heat exchange pipe 211 or the second main heat exchange pipe 212 is elliptical, and the long axis of the ellipse extends along the flue gas inlet direction. When the first main heat exchange pipe 211 is an elliptical pipe, compared with the traditional circular heat exchange pipe, the elliptical pipe can accommodate more rows of the first main heat exchange pipe 211 in the same width range. This close and orderly arrangement not only optimizes the space utilization, but also directly improves the heat exchange area, so that the heat exchange process is more efficient and sufficient. When the high-temperature flue gas passes through, it can contact the surface of the heat exchange pipe more widely, so as to realize faster heat transfer and more efficient energy recovery. When the second main heat exchange pipe 212 is an elliptical pipe, compared with the traditional circular heat exchange pipe, the contact area with the flue gas can be increased, and the resistance to the flue gas flowing to the first main heat exchange pipe 211 can be further reduced. Of course, in some embodiments, the radial sections of the first main heat exchange pipe 211 and the second main heat exchange pipe 212 can be designed as elliptical at the same time, so as to integrate space optimization, heat exchange efficiency improvement and energy consumption reduction.

[0096] The same or similar reference signs in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0097] The above is only a preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchange fin, characterized by, The heat exchange fin comprises: a fin body having a thickness direction and provided with a plurality of through holes penetrating the thickness direction, the through holes being used for penetrating a main heat exchange tube group, the fin body having an inflow end and an outflow end along a smoke inflow direction; a spoiler structure connected to one side surface of the fin body along the thickness direction, used for blocking part of the smoke flowing to the outflow end; and a guide structure connected to the fin body and located on the same surface of the fin body as the spoiler structure, the guide structure being located on one side of the spoiler structure close to the inflow end, used for guiding the smoke to the spoiler structure. The guide structure is an arch structure, and a guide channel extending along the smoke inflow direction is formed in the arch structure, and the spoiler structure is located at the outlet of the guide channel.

2. The heat exchange fin as set forth in claim 1, wherein The cross section of the guide channel is gradually reduced from the inflow end to the outflow end.

3. The heat exchange fin according to claim 2, wherein A first smoke passage opening communicating with the guide channel is formed on the surface of the fin body away from the guide structure.

4. The heat exchange fin as set forth in claim 2, wherein The spoiler structure comprises a spoiler ring and a spoiler plate arranged in sequence along the smoke inflow direction, and the length extension direction of the spoiler plate is arranged at an angle with the smoke inflow direction.

5. The heat exchange fin as set forth in claim 1, wherein The projection plane of the spoiler ring is located in the spoiler plate along the smoke inflow direction.

6. The heat exchange fin as set forth in claim 5, wherein A second smoke passage opening communicating with the inner ring of the spoiler ring is formed on the surface of the fin body away from the guide structure.

7. The heat exchange fin as set forth in claim 5, wherein The heat exchange fin further comprises an enclosing member connected to one side surface of the fin body in the thickness direction and arranged in a circumferential direction of the through hole.

8. The heat transfer fin according to claim 1, wherein A plurality of spoiler structures and guide structures are provided, and one guide structure is located on one side of one spoiler structure close to the inflow end.

9. The heat exchange fin as set forth in claim 1, wherein The heat exchange fin comprises:

10. A heat exchanger, characterized by the heat exchange fin according to any one of claims 1-9; and a main heat exchange tube group and a condensation tube group arranged in sequence along the smoke inflow direction, the main heat exchange tube group penetrating the through hole. The heat exchanger comprises:

11. A water tank assembly characterized by, a box body having a smoke cavity; and the heat exchange fin according to claim 10, arranged in the smoke cavity. The box body is provided with a condensation water inlet box and a condensation water outlet box, and the condensation tube group comprises a plurality of condensation tubes, both ends of each condensation tube being communicated with the condensation water inlet box and the condensation water outlet box respectively, so that the plurality of condensation tubes are arranged in parallel.

12. The water tank assembly of claim 11, wherein, The condensation water inlet box and the condensation water outlet box are arranged on the same side wall of the box body.

13. The water tank assembly of claim 12, wherein, The box body comprises a first side wall and a second side wall arranged oppositely along the smoke inflow direction, the first side wall is provided with a first main heat exchange water box, the second side wall is provided with a second main heat exchange water box, the main heat exchange tube group comprises a plurality of first main heat exchange tubes, both ends of the plurality of first main heat exchange tubes being communicated with the first main heat exchange water box and the second main heat exchange water box respectively; 14. The water tank assembly of claim 12, wherein, and at least one end of at least one first main heat exchange tube is communicated with the condensation water inlet box. The first main heat exchange water box and the second main heat exchange water box each comprise a plurality of first main heat exchange water boxes, and one first main heat exchange tube is communicated with one first main heat exchange water box and one second main heat exchange water box, so that the plurality of first main heat exchange tubes are connected in series to form a series water circuit.

15. The water tank assembly of claim 14, wherein, ​ 16. The water tank assembly of claim 14, wherein, Along the smoke inlet direction, the first main heat exchange tubes are arranged in at least two rows, and the two rows of the first main heat exchange tubes are arranged in staggered arrangement.

17. The water tank assembly of claim 14, wherein, The box further comprises a third side wall and a fourth side wall arranged opposite to each other along the smoke inlet direction, the third side wall and the fourth side wall are located between the first side wall and the second side wall, and the box further has a smoke inlet communicated with the flue gas cavity; The first side wall is further provided with a third main heat exchange water box, the second side wall is further provided with a fourth main heat exchange water box, the main heat exchange tube group further comprises a plurality of second main heat exchange tubes, the plurality of second main heat exchange tubes are located on one side of the plurality of first main heat exchange tubes close to the smoke inlet, and opposite ends of the plurality of second main heat exchange tubes are respectively communicated with the third main heat exchange water box and the fourth main heat exchange water box, and at least one second main heat exchange tube is communicated with the first main heat exchange water box; The plurality of second main heat exchange tubes are arranged in the third side wall and the fourth side wall.

18. The water tank assembly of claim 17, wherein, The radial section of the first main heat exchange tube and / or the second main heat exchange tube is an ellipse, and the long axis of the ellipse extends along the smoke inlet direction.

19. A gas water heater, characterized by, Comprise: A housing; The water tank assembly according to any one of claims 11-18 is arranged in the housing; And A burner arranged in the housing and capable of generating flue gas flowing to the flue gas cavity.

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