Water tank assembly and gas water heater

Abstract

The utility model discloses a water tank assembly and a gas water heater, the water tank assembly comprises a tank body and a heat exchanger, the tank body is provided with a smoke cavity, and the smoke cavity has a smoke inlet direction; the heat exchanger comprises a main heat exchange pipe set and a condensation pipe set which are sequentially arranged in the smoke inlet direction, the condensation pipe set comprises a plurality of condensation pipes which are sequentially arranged in the smoke inlet direction, and each condensation pipe extends in a bent mode in the direction forming an included angle with the smoke inlet direction. According to the technical scheme, the heat exchange efficiency of the condensation pipe can be improved, and the energy utilization efficiency of the water tank assembly is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas water heaters, and in particular to a water tank assembly and a gas water heater using the water tank assembly. Background Art

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

[0003] However, in the related art, the heat exchanger includes a main heat exchange tube and a condenser. The flue gas first passes through the main heat exchange tube and then through the condenser. After the flue gas passes through the main heat exchange tube, its temperature has been reduced, but it still contains a certain amount of heat energy. At this time, the flue gas enters the condenser. Through a further heat exchange process, the condenser recovers the remaining heat in the flue gas (mainly the latent heat released when water vapor condenses) and transfers it to water. However, the condenser cannot fully absorb the heat of the high-temperature hot air flow, resulting in serious heat energy loss and low heat exchange efficiency. Utility Model Content

[0004] The embodiments of the present application provide a water tank assembly and a gas water heater, which can improve the heat exchange efficiency of the condenser to enhance the energy utilization efficiency of the water tank assembly.

[0005] In a first aspect, an embodiment of the present application provides a water tank assembly, the water tank assembly comprising:

[0006] The box body is provided with a smoke cavity, wherein the smoke cavity has a smoke inlet direction; and

[0007] The heat exchanger includes a main heat exchange tube group and a condenser tube group arranged in sequence along the smoke inlet direction. The condenser tube group includes a plurality of condenser tubes. The plurality of condenser tubes are arranged in sequence along the smoke inlet direction, and each of the condenser tubes is bent and extended in a direction forming an angle with the smoke inlet direction.

[0008] In some embodiments, the box has a first direction and a second direction perpendicular to the smoke inlet direction, and the first direction and the second direction are arranged at an angle;

[0009] The condenser includes multiple straight segments and multiple curved segments, the straight segments extend along the first direction, and the multiple straight segments are arranged at intervals along the second direction, and the curved segments are connected to adjacent straight segments.

[0010] In some embodiments, along the smoke inlet direction, two adjacent condensing tubes are at least partially staggered. Along the smoke inlet direction, two adjacent condensing tubes are at least partially staggered.

[0011] In some embodiments, the condenser is a bellows.

[0012] In some embodiments, the box body is provided with a condensation water inlet box and a condensation water outlet box, and both ends of each condensation tube are respectively connected to the condensation water inlet box and the condensation water outlet box, so that the multiple condensation tubes are arranged in parallel.

[0013] In some embodiments, the condensed water inlet box and the condensed water outlet box are arranged on the same side wall of the box body.

[0014] In some embodiments, the box includes a first side wall and a second side wall arranged opposite to each other 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 tube group includes a plurality of first main heat exchange tubes, and both ends of the plurality of first main heat exchange tubes are respectively connected to the first main heat exchange water box and the second main heat exchange water box;

[0015] And one end of at least one of the first main heat exchange tubes is connected to the condensation water inlet box.

[0016] In some embodiments, the first main heat exchange box and the second main heat exchange box each include multiple ones, and one first main heat exchange tube is correspondingly connected to one first main heat exchange box and one second main heat exchange box, so that the multiple first main heat exchange tubes are connected in series to form a series water circuit.

[0017] In some embodiments, along the smoke inlet direction, the plurality of first main heat exchange tubes are provided in at least two rows, and the two rows of first main heat exchange tubes are arranged in a staggered manner.

[0018] In some embodiments, the box body further includes a third side wall and a fourth side wall disposed opposite to each other along the smoke inlet direction, the third side wall and the fourth side wall are both located between the first side wall and the second side wall, and the box body further includes a smoke inlet communicated with the smoke cavity;

[0019] 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 includes a plurality of second main heat exchange tubes, the plurality of second main heat exchange tubes are located on a side of the plurality of first main heat exchange tubes close to the smoke inlet, the opposite ends of the plurality of second main heat exchange tubes are respectively connected to 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 connected to the first main heat exchange water box;

[0020] A plurality of the second main heat exchange tubes are respectively arranged on the third side wall and the fourth side wall.

[0021] In some embodiments, the radial cross-section of the first main heat exchange tube and / or the second main heat exchange tube is elliptical, and the major axis of the ellipse extends along the smoke inlet direction.

[0022] In some embodiments, the heat exchanger further comprises heat exchange fins, and the heat exchange fins comprise:

[0023] The fin body has a thickness direction and is provided with a plurality of tube holes penetrating along the thickness direction, wherein the tube holes are used for the main heat exchange tube group to pass through, and along the smoke inlet direction, the fin body has an inflow end and an outflow end;

[0024] a flow-turbulating structure connected to a side surface of the fin body along the thickness direction, for blocking part of the smoke flowing toward the outflow end; and

[0025] The guide structure is connected to the fin body and is located on the same surface of the fin body as the flow-disturbing structure. The guide structure is located on a side of the flow-disturbing structure close to the inflow end to guide the smoke to the flow-disturbing structure.

[0026] In some embodiments, the guiding structure is an arched structure, and a guide channel extending along the smoke inlet direction is formed in the arched structure, and the flow-disturbing structure is located at the outlet of the guide channel.

[0027] In some embodiments, a cross section of the flow guiding channel is gradually reduced from the inflow end toward the outflow end.

[0028] In some embodiments, a first smoke outlet communicating with the guide channel is formed on a surface of the fin body facing away from the guide structure.

[0029] In some embodiments, the spoiler structure includes a spoiler ring and a spoiler plate sequentially arranged along the smoke inlet direction, and the length extension direction of the spoiler plate is arranged at an angle to the smoke inlet direction.

[0030] In some embodiments, projected along the smoke inlet direction, the projection surface of the spoiler ring is located inside the spoiler plate.

[0031] In some embodiments, a second smoke outlet communicating with the inner ring of the spoiler ring is formed on a surface of the fin body facing away from the guide structure.

[0032] In some embodiments, the heat exchange fin further includes an enclosure member connected to a side surface of the fin body in the thickness direction and disposed around the circumference of the through-tube hole.

[0033] In some embodiments, the spoiler structure and the guide structure are both provided in plurality, and one guide structure is correspondingly located on one side of the spoiler structure close to the inflow end.

[0034] In a second aspect, an embodiment of the present application provides a gas water heater, comprising:

[0035] case;

[0036] The water tank assembly as described above is disposed in the housing; and

[0037] The burner is arranged in the shell and can generate heat exchange flue gas flowing into the flue gas cavity.

[0038] The water tank assembly and gas water heater of the present embodiment are configured such that the multiple condensing tubes of the heat exchanger are arranged in sequence along the direction of smoke inlet into the smoke chamber of the tank, and each condensing tube is bent and extended in a direction forming an angle with the smoke inlet direction. Thus, the water tank assembly of the present embodiment has at least the following technical effects:

[0039] First, the arrangement and curved shape of the condenser tubes allow the flue gas to more fully contact the surface of the condenser tubes during the flow, extending the path and time of heat exchange. And due to the increase in contact area, the heat energy in the flue gas can be more fully absorbed by the condenser tubes and transferred to the water, reducing the waste and loss of heat energy to improve the heat exchange efficiency. At the same time, because the path of the curved condenser tube helps to guide the flue gas to be more evenly distributed on the outer surface, it reduces local overheating and the formation of deposits. Therefore, the water tank assembly of this embodiment not only ensures high heat exchange efficiency, but also optimizes energy utilization efficiency, providing a more energy-saving and efficient hot water use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0041] Figure 1 This is a structural diagram of an embodiment of a water tank assembly of the present application;

[0042] Figure 2 This is a structural diagram of the water tank assembly from another perspective of this application;

[0043] Figure 3 For the Figure 2 Cross-section of the middle AA section;

[0044] Figure 4 This is a schematic structural diagram of the condenser tube group of the water tank assembly of this application;

[0045] Figure 5 A schematic diagram of a portion of the structure of the heat exchanger of the water tank assembly of this application;

[0046] Figure 6 This is a schematic diagram of the structure of the heat exchange fins of the heat exchanger of this application;

[0047] Figure 7 for Figure 6 A partial enlarged view of point A in the middle;

[0048] Figure 8 This is a schematic structural diagram of the heat exchange fins of the heat exchanger of this application from another perspective.

[0049] Description of Figure Numbers:

[0050] 1. Water tank assembly; 10. Tank body; 11. First sidewall; 111. First main water exchange box; 112. Third main water exchange box; 12. Second sidewall; 121. Second main water exchange box; 122. Fourth main water exchange box; 13. Third sidewall; 14. Fourth sidewall; 10A. Smoke chamber; 10B. Smoke inlet; 10C. Smoke outlet; 10a. Condensate water inlet box; 10b. Condensate water outlet box; 10c. Water inlet; 10d. Water outlet;

[0051] 20. Heat exchanger; 21. Main heat exchange tube group; 211. First main heat exchange tube; 212. Second main heat exchange tube; 22. Condenser tube group; 221. Condenser tube; 2211. Straight section; 2212. Curved section; 23. Heat exchange fin; 231. Fin body; 231A. Inflow end; 231B. Outflow end; 2311. First smoke outlet; 2312. Second smoke outlet; 2313. Tube hole; 232. Turbine structure; 2321. Turbine ring; 2322. Turbine plate; 233. Guide structure; 233A. Guide channel; 234. Enclosure.

[0052] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0054] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0055] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0057] In the first aspect of the present application, a gas water heater is proposed. In an embodiment of the present application, the gas water heater can obtain high-temperature flue gas through combustion heating, and then transfer the heat of the high-temperature flue gas to the cold water by heat exchange with the high-temperature flue gas, thereby heating the cold water to prepare hot water, that is, prepare the required bathroom water.

[0058] It is understood that a gas water heater can mix gas with air and use the mixed gas as fuel to achieve full combustion of the fuel. Specifically, the gas and air can be pre-mixed in a specific combustion ratio to form the desired fuel. The fuel is then ignited to produce high-temperature flue gas. This allows for more efficient energy conversion and a combustion process with lower flue gas emissions, commonly known as full premixing technology. Of course, the fuel can also be gas only, and this embodiment does not limit this.

[0059] See also Figure 1 In this embodiment, the gas water heater includes a housing (not shown), a water tank assembly 1, and a burner (not shown). The housing is used to support and install the various components of the gas water heater. The water tank assembly 1 and the burner are respectively arranged within the housing. The water tank assembly 1 has a smoke chamber 10A.

[0060] The fuel can be fed into the burner and ignited by the burner to obtain high-temperature flue gas, which then flows into the flue gas cavity 10A to exchange heat with the water flowing through the water tank assembly 1, thereby heating the water to prepare the required hot water.

[0061] The high-temperature flue gas generated by the burner of the gas water heater exchanges heat with the heat exchange liquid in the heat exchanger 20 to heat the heat exchange liquid.

[0062] However, the heat exchanger 20 includes a main heat exchange tube and a condenser 221. The flue gas first passes through the main heat exchange tube and then through the condenser 221. After the flue gas passes through the main heat exchange tube, its temperature has been reduced, but it still contains a certain amount of heat energy. At this time, the flue gas enters the condenser 221. Through a further heat exchange process, the condenser 221 recovers the remaining heat in the flue gas (mainly the latent heat released when water vapor condenses) and transfers it to water. However, the condenser 221 cannot fully absorb the heat of the high-temperature hot air flow, resulting in serious heat energy loss and low heat exchange efficiency.

[0063] To resolve the above issues, please refer to Figures 1 to 4 The second aspect of the present application proposes a water tank assembly 1. In an embodiment of the present application, the water tank assembly 1 includes a tank body 10 and a heat exchanger 20.

[0064] The housing 10 can be made of stainless steel, which offers advantages such as excellent corrosion resistance, improved anti-fouling properties, and low cost. Of course, the housing 10 can also be made of copper, which is not a limitation in this embodiment. The housing 10 can be configured as a rectangular parallelepiped or a cube to achieve a more regular shape for ease of manufacturing. The housing 10 has the aforementioned flue gas cavity 10A, and the heat exchanger 20 is disposed within the flue gas cavity 10A. The flue gas cavity 10A has a flue gas inlet direction.

[0065] The heat exchanger 20 includes a main heat exchange tube group 21 and a condenser tube group 22 arranged in sequence along the smoke inlet direction. The condenser tube group 22 includes a plurality of condenser tubes 221. The plurality of condenser tubes 221 are arranged in sequence along the smoke inlet direction, and each condenser tube 221 bends and extends in a direction forming an angle with the smoke inlet direction. The main heat exchange tube group 21 and the condenser tube group 22 can be a tube structure made of metal materials such as stainless steel or copper. Stainless steel is used as an example, so that the main heat exchange tube group 21 and the condenser tube group 22 have the advantages of better corrosion resistance, better anti-scaling and lower cost. Liquid flow channels are formed in the main heat exchange tube group 21 and the condenser tube group 22 for the heat exchange liquid to flow.

[0066] It can be understood that when the high-temperature flue gas flows through the main heat exchange tube group 21 and the condenser tube group 22, it will come into contact with the main heat exchange tube group 21 and the condenser tube group 22 to transfer heat to the main heat exchange tube group 21 and the condenser tube group 22, and then the main heat exchange tube group 21 and the condenser tube group 22 will exchange heat with the heat exchange liquid to ultimately transfer the heat to the heat exchange liquid.

[0067] Based on the water tank assembly 1 and gas water heater of the embodiment of the present application, the multiple condensing tubes 221 of the heat exchanger 20 are arranged in sequence along the smoke inlet direction of the smoke chamber 10A of the tank body 10, and each condensing tube 221 is bent and extended in a direction forming an angle with the smoke inlet direction. As a result, the water tank assembly 1 of this embodiment has at least the following technical effects:

[0068] First, the arrangement and curved shape of the condenser 221 allow the flue gas to more fully contact the surface of the condenser 221 during the flow, thereby extending the path and time of heat exchange. And due to the increase in contact area, the heat energy in the flue gas can be more fully absorbed by the condenser 221 and transferred to the water, reducing the waste and loss of heat energy to improve the heat exchange efficiency. At the same time, because the curved path of the condenser 221 helps to guide the flue gas to be more evenly distributed on the surface of the tube, local overheating and the formation of deposits are reduced. Therefore, the water tank assembly 1 of this embodiment not only ensures efficient heat exchange, but also optimizes energy utilization efficiency, providing a more energy-saving and efficient hot water use experience.

[0069] Combined with reference Figure 4 In some structural forms, the housing 10 has a first direction and a second direction perpendicular to the smoke inlet direction, and the first direction and the second direction are arranged at an angle. It is understandable that when the housing 10 is arranged in a cubic structure, the smoke inlet direction is the height direction of the housing 10, and the first direction and the second direction are the length and width directions of the housing 10, respectively. The condenser 221 includes multiple straight segments 2211 and multiple curved segments 2212. The straight segments 2211 extend along the first direction, and the multiple straight segments 2211 are arranged at intervals along the second direction. The curved segments 2212 are connected to adjacent straight segments 2211. This makes the arrangement more regular, further increasing the contact area.

[0070] Optionally, along the smoke inlet direction, two adjacent condensers 221 are at least partially staggered. This staggered arrangement not only increases the relative surface area between the condensers 221, allowing the smoke to more fully contact the condensers 221 when passing through, thereby improving the efficiency of heat exchange, but also enhances the stability and durability of the entire system. The staggered design helps to disperse the impact force of the smoke during flow, reduces direct wear on the condensers 221, and extends the service life of the equipment. At the same time, this layout also improves the compactness of the structure, allowing more condensers 221 to be accommodated in a limited space, thereby improving the overall heat treatment capacity and efficiency. In addition, the staggered condensers 221 also optimize the airflow channel, allowing the smoke to form a more complex and changeable flow pattern during the flow process, further promoting the transfer and exchange of heat.

[0071] In some embodiments, the condenser 221 is a bellows. It is understood that the bellows has a corrugated structure formed on its wall, which increases the heat exchange area between the bellows and the high-temperature flue gas, thereby improving the heat exchange efficiency between the bellows and the high-temperature flue gas. Furthermore, the bellows is lightweight and has low material cost.

[0072] Reference Figures 1 to 4 In some structural forms, the housing 10 is provided with a condensate water inlet box 10a and a condensate water outlet box 10b, and the two ends of each condenser tube 221 are connected to the condensate water inlet box 10a and the condensate water outlet box 10b, respectively, so that multiple condenser tubes 221 are arranged in parallel. This allows multiple condenser tubes 221 to work in parallel and jointly undertake the task of heat exchange. Compared with the traditional series water channel form, its significant advantage is that it can significantly increase the overall water flow rate. Because the parallel structure allows water to flow in multiple channels simultaneously, it can more effectively utilize water resources and improve heat exchange efficiency. At the same time, because the temperature of the condenser tube 221 during operation is generally lower than that of the main heat exchange tube group 21, in this parallel arrangement, there is no need to worry too much about the risk of water vaporization caused by excessive temperature in the condenser tube 221. 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.

[0073] Furthermore, the condensate inlet box 10a and the condensate outlet box 10b are located on the same side wall of the housing 10. This layout not only optimizes the internal space structure but also greatly enhances the convenience of the installation process. During installation, there is no need to shuttle between the multiple side walls of the housing 10. Simply focus on the same side wall to easily complete the installation and commissioning of the inlet and outlet boxes of the condenser tube 221. This significantly saves installation time and reduces installation difficulty. It also reduces the potential risk of failure due to improper operation, thereby improving the overall efficiency of the water tank assembly 1.

[0074] Reference Figure 1 、 Figure 2 as well as Figure 5Optionally, the housing 10 includes a first side wall 11 and a second side wall 12, arranged opposite 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 tube assembly 21 includes multiple first main heat exchange tubes 211, each of which is connected to the first main heat exchange water box 111 and the second main heat exchange water box 121 at both ends. Thus, the multiple first main heat exchange tubes 211 connect the first main heat exchange water box 111 and the second main heat exchange water box 121, forming a heat exchange path. The multiple first main heat exchange tubes 211 can be arranged as straight tubes to simplify processing. At least one end of the first main heat exchange tube 211 is connected to the condensate inlet box 10a. During this process, the heat exchange liquid is smoothly exchanged between the main heat exchange tubes, the first main heat exchange water box 111, and the second main heat exchange water box 121, effectively transferring and releasing heat. After the heat exchange liquids complete the initial heat exchange, they flow along at least one first main heat exchange tube 211 to the condenser water inlet box 10a, where they undergo further heat exchange within the multiple condenser tubes 221. This design not only improves the heat exchange efficiency of the entire system, but also maximizes the utilization of the heat exchange liquid and reduces energy waste. It should be noted that the condenser water inlet box 10a and the condenser water outlet box 10b can be provided with either the first side wall 11 or the second side wall 12 simultaneously to facilitate the same processing.

[0075] Furthermore, each of the first main heat exchange water box 111 and the second main heat exchange water box 121 includes multiple ones, and one first main heat exchange tube 211 is connected to one first main heat exchange water box 111 and one second main heat exchange water box 121, so that the multiple first main heat exchange tubes 211 are connected in series to form a series water path. In this way, compared with the parallel water path form, the series water path form can avoid the phenomenon of empty tubes or water siltation in the first main heat exchange tubes 211 caused by the small flow rate and slow flow rate of the heat exchange liquid in some first main heat exchange tubes 211, thereby slowing down the water vaporization and scaling in the first main heat exchange tubes 211, effectively reducing the risk of damage to the first main heat exchange tubes 211, extending the service life of the main heat exchange tube group 21, and also avoiding the occurrence of explosion of the water tank assembly 1, ensuring the safety of the use of the water tank assembly 1.

[0076] Optionally, at least two rows of the plurality of first main heat exchange tubes 211 are provided along the smoke inlet direction, with the two rows of first main heat exchange tubes 211 arranged in a staggered arrangement. This staggered arrangement of the first main heat exchange tubes 211 allows for more complete contact between the smoke and the first main heat exchange tubes 211 as it flows through, increasing the heat exchange area and promoting efficient heat transfer. This layout also helps reduce eddies and dead spots in the smoke flow, improving both smoke flow uniformity and heat exchange uniformity.

[0077] Reference Figures 1 to 3Optionally, the housing 10 further includes a third side wall 13 and a fourth side wall 14 disposed opposite to each other along the direction of smoke inlet, and both the third side wall 13 and the fourth side wall 14 are located between the first side wall 11 and the second side wall 12. The housing 10 further includes a smoke inlet 10B and a smoke outlet 10C, both of which are connected to the smoke chamber 10A. In an exemplary embodiment, the smoke inlet 10B and the smoke outlet 10C are the same opening, that is, after the smoke flows into the smoke chamber 10A from the smoke inlet 10B, it changes its flow direction and turns back when it reaches the bottom wall of the smoke chamber 10A, and then flows out from the smoke outlet 10C. In this way, the smoke inlet 10B and the smoke outlet 10C are the same opening. In another exemplary embodiment, the smoke inlet 10B and the smoke outlet 10C are located on opposite sides of the box body 10. In this way, after the smoke from the smoke inlet 10B flows into the smoke cavity 10A, it will not change its flow direction and will flow out along the smoke outlet 10C. In this way, the smoke inlet 10B and the smoke outlet 10C are different openings.

[0078] The first side wall 11 is further provided with a third main heat exchange water box 112, and the second side wall 12 is further provided with a fourth main heat exchange water box 122. The main heat exchange tube assembly 21 also includes a plurality of second main heat exchange tubes 212. The plurality of second main heat exchange tubes 212 are located on a side of the plurality of first main heat exchange tubes 211 near the smoke inlet 10B. The opposite ends of the plurality of second main heat exchange tubes 212 are respectively connected to the third main heat exchange water box 112 and the fourth main heat exchange water box 122, and at least one second main heat exchange tube 212 is connected to the first main heat exchange water box 111. The plurality of second main heat exchange tubes 212 are respectively provided on the third side wall 13 and the fourth side wall 14.

[0079] The multiple second main heat exchange tubes 212 are meticulously arranged on the third and fourth side walls 13, 14. This arrangement cleverly avoids obstruction of the flue gas flowing toward the first main heat exchange tubes 211, ensuring smooth and efficient flue gas flow. This layout also promotes uniformity and stability in the heat exchange process, allowing each main heat exchange tube group 21 to fully utilize its heat exchange efficiency, avoiding localized overheating or uneven cooling.

[0080] When high-temperature flue gas flows into the housing 10 through the smoke inlet 10B, it first encounters the multiple second main heat exchange tubes 212 for preliminary heat exchange. This process effectively reduces the flue gas temperature, laying a good foundation for subsequent cooling and heat recovery. Subsequently, the preliminarily cooled flue gas continues to flow through the multiple first main heat exchange tubes 211 for further heat exchange, achieving efficient heat transfer and utilization.

[0081] Furthermore, the housing 10 also has a water inlet 10c and a water outlet 10d. The water inlet 10c is connected to the condensing water inlet box 10a, and the water outlet 10d is connected to the fourth main heat exchange water pipe. In this way, the heat exchange liquid can flow sequentially through the water inlet 10c, the condensing tube group 22, the main heat exchange tube group 21, and the water outlet 10d, achieving circulation of the heat exchange liquid within the main heat exchange tube group 21 and the condensing tube group 22, thereby improving the heat utilization rate of the flue gas. The condensing water inlet box 10a and the fourth main heat exchange water pipe are located on the same side of the housing 10, which facilitates connection with external pipelines.

[0082] Furthermore, the radial cross-section of the first main heat exchange tube 211 or the second main heat exchange tube 212 is elliptical, and the major axis of the ellipse extends along the direction of smoke inlet. Among them, when the first main heat exchange tube 211 is an elliptical tube, compared with the traditional circular heat exchange tube, the elliptical tube can accommodate more first main heat exchange tubes 211 within the same width range. This tight and orderly arrangement not only optimizes space utilization, but also directly increases the heat exchange area, making the heat exchange process more efficient and sufficient. When the high-temperature flue gas passes through, it can contact the surface of the heat exchange tube more widely, thereby achieving faster heat transfer and more efficient energy recovery. When the second main heat exchange tube 212 is an elliptical tube, compared with the traditional circular heat exchange tube, it can increase the contact area with the flue gas and further reduce the obstruction of the flue gas flowing to the first main heat exchange tube 211. Of course, in some embodiments, the radial cross-sections of the first main heat exchange tube 211 and the second main heat exchange tube 212 can be designed to be elliptical at the same time, so as to optimize space, improve heat exchange efficiency and reduce energy consumption.

[0083] Combined with reference Figures 4 to 6 In some structural forms, the heat exchanger 20 also includes heat exchange fins 23. The heat exchange fins 23 can be made of copper to have the advantage of better thermal conductivity. Of course, the heat exchange fins 23 can also be made of other metal materials such as stainless steel, and this embodiment does not limit this.

[0084] The heat exchange fin 23 includes a fin body 231 , a flow-disturbing structure 232 and a guiding structure 233 .

[0085] The fin body 231 is the main part of the heat exchange fin 23, which can be roughly rectangular, so the fin body 231 can have thickness, width and length directions that are perpendicular to each other. Along the smoke inlet direction, the fin body 231 has an inlet end 231A and an outlet end 231B, and the inlet end 231A and the outlet end 231B are arranged in sequence in the smoke width direction. The fin body 231 is provided with a plurality of through-tube holes 2313 that pass through along the thickness direction. The through-tube holes 2313 are used for the main heat exchange tube group 21 to pass through, that is, the first main heat exchange tube 211 can be passed through a through-tube hole 2313 to ensure the positional stability of the first main heat exchange tube 211 and the fin body 231. It should be noted that when the first main heat exchange tube 211 is an elliptical tube, the through-tube hole 2313 is an elliptical hole. This not only ensures a stable positional relationship between the heat exchange tube and the fin body 231, preventing shaking and misalignment during operation, but also greatly improves heat conduction efficiency, allowing heat to be more efficiently transferred to the surrounding medium through the fin body 231. It will be understood that multiple heat exchange fins 23 are provided, and the multiple heat exchange fins 23 are arranged in sequence along the axial direction of the first main heat exchange tube 211 to further increase the flue gas retention time.

[0086] The spoiler structure 232 is connected to one side surface of the fin body 231 along the thickness direction, and the guide structure 233 is connected to the fin body 231 and is located on the same surface of the fin body 231 as the spoiler structure 232. The spoiler structure 232 and the guide structure 233 can be integrated with the fin body 231 to ensure the structural strength of the spoiler structure 232 and the guide structure 233, ensuring that the spoiler structure 232 and the guide structure 233 can still maintain good form and function under complex working conditions.

[0087] The technical solution of this embodiment is to locate the guide structure 233 on the side of the flow-disturbing structure 232 close to the inflow end 231A. The guide structure 233 guides the smoke to the flow-disturbing structure 232, and the flow-disturbing structure 232 blocks part of the smoke from flowing toward the outflow end 231B. As a result, the heat exchange fin 23 of this embodiment has at least the following technical effects:

[0088] In this way, through the above-mentioned layout, the guide structure 233 can accurately guide a large amount of smoke to the spoiler structure 232. Subsequently, the spoiler structure 232, with its blocking effect, effectively slows down the trend of the smoke to flow directly to the outflow end 231B, forcing the smoke to produce more complex turbulence and mixing phenomena around the fin body 231. In this process, the contact area between the smoke and the fin body 231 is significantly expanded, and the contact time is also extended, providing more sufficient opportunities for heat exchange. Heat shuttles freely between the smoke and the fin body 231, achieving efficient and uniform transfer, greatly improving the heat exchange efficiency. Therefore, the heat exchange fins 23 of this embodiment promote the full exchange of heat in the smoke, thereby greatly improving the heat and mass transfer efficiency during the heat exchange process.

[0089] Combined with reference Figure 7 In some structural forms, the guide structure 233 is an arched structure, and a guide channel 233A extending in the direction of smoke inlet is formed within the arched structure. The flow-disturbing structure 232 is located at the outlet of the guide channel 233A. Compared to the traditional scheme of providing a guide plate, the guide structure 233 is designed as an arched structure. The shape of the guide channel 233A naturally formed within the arched structure is highly consistent with the direction of smoke flow, which can effectively guide the smoke to flow along a predetermined path, reducing the resistance and turbulence of the smoke during the flow process, thereby improving the efficiency of heat exchange. In contrast, although traditional guide plates can also play a role in guiding smoke, their shape is often relatively simple, making it difficult to fully adapt to the complex flow characteristics of smoke, resulting in relatively low heat exchange efficiency.

[0090] Furthermore, the arched structure incorporates a flow-disrupting structure 232 at the outlet of the guide channel 233A to ensure that the flue gas, after exiting the guide channel 233A, flows in a directed manner toward the flow-disrupting structure 232. Through the action of the flow-disrupting structure 232, some of the flue gas experiences intense turbulence and mixing around the fin bodies 231, significantly increasing the contact area and duration between the flue gas and the fin bodies 231 and promoting further heat transfer. This design not only improves heat exchange efficiency but also makes the heat exchange process more uniform and stable.

[0091] Furthermore, the cross-section of the guide channel 233A is configured to gradually decrease from the inlet end 231A toward the outlet end 231B. As the cross-section gradually decreases, the flue gas gradually accelerates during flow, creating a "jet"-like effect that helps enhance heat and mass exchange between the flue gas and the fin body 231. At the same time, the tapering cross-section also promotes the uniform distribution of flue gas within the guide channel 233A, reducing eddies and dead zones caused by uneven flow velocity, thereby improving heat exchange efficiency. Furthermore, this design also helps reduce energy loss during flue gas flow, allowing more energy to be effectively utilized in the heat exchange process.

[0092] Optionally, a first smoke outlet 2311 connected to the guide channel 233A is provided on the surface of the fin body 231 facing away from the guide structure 233. In this way, the smoke on the surface of the fin body 231 facing away from the guide structure 233 can also flow into the guide channel 233A through the first smoke outlet 2311, so that more smoke flows to the turbulent 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 sufficient opportunities for heat transfer. At the same time, since more smoke is directed to the turbulent structure 232, the blocking and mixing effects of the turbulent structure 232 on the smoke are also more fully exerted, further promoting the exchange of heat in the smoke with the fin body 231.

[0093] Combined with reference Figures 6 to 8 In some embodiments, the spoiler structure 232 includes a spoiler ring 2321 and spoiler plates 2322, which are arranged sequentially along the smoke inlet direction. The length of the spoiler plates 2322 is arranged at an angle to the smoke inlet direction. As the smoke flows toward the spoiler ring 2321, it flows along the peripheral wall of the spoiler ring 2321, effectively blocking and guiding the incoming smoke and extending its retention time. The spoiler plates 2322, which follow the spoiler ring 2321, are arranged at an angle to the smoke inlet direction. This allows the spoiler plates 2322 to more fully utilize the flow energy of the smoke, guiding the smoke to produce more complex and intense turbulence and mixing around the fin bodies 231. This complex flow pattern not only increases the contact area and contact time between the smoke and the fin bodies 231, but also promotes uniform and efficient heat transfer. Therefore, the combination of the spoiler ring 2321 and the spoiler plate 2322 in the spoiler structure 232, and the angle setting between the spoiler plate 2322 and the smoke inlet direction, together constitute an efficient and stable heat exchange system.

[0094] Furthermore, projected along the smoke inlet direction, the projection of spoiler ring 2321 lies within spoiler plate 2322. This arrangement helps reduce energy loss during smoke flow. Because spoiler ring 2321 and spoiler plate 2322 fit closely together, smoke maintains a high flow velocity and low resistance as it passes through this area, thereby reducing energy dissipation caused by uneven flow velocity or vortex generation.

[0095] Combined with reference Figures 6 to 8Optionally, a second smoke outlet 2312 connected to the inner ring of the spoiler ring 2321 is provided on the surface of the fin body 231 facing away from the guide structure 233. This allows the smoke that might have originally passed directly over the back of the fin body 231 to be redirected and flow smoothly into the inner ring area of ​​the spoiler ring 2321 through the second smoke outlet 2312. Such a layout arrangement is essentially a careful planning of the smoke flow path. It not only widens the interface where the smoke contacts 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 can be carried out more fully, and the efficiency and effect of heat transfer are significantly improved. Therefore, the addition of the second smoke outlet 2312 not only enhances the heat exchange performance of the fin structure, but also makes the entire heat exchange process more efficient and stable.

[0096] Reference Figure 6 In some embodiments, the heat exchange fin 23 further includes an enclosure 234, which is connected to one side surface of the fin body 231 in the thickness direction and is arranged around the circumference of the tube hole 2313. The enclosure 234 can be an integral structure with the fin body 231 to ensure the structural strength of the enclosure 234. The provision of the enclosure 234 can directly and effectively increase the contact area between the first main heat exchange tube 211 and the fin body 231. With the significant increase in 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 can be exchanged quickly and fully 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 ideal heat exchange effect in a shorter time, meeting the user's demand for efficient and energy-saving hot water supply.

[0097] Combined with reference Figures 6 to 8 Optionally, there are multiple spoiler structures 232 and guide structures 233, and one guide structure 233 is located on the side of a spoiler structure 232 close to the inlet end 231A. This not only enhances the flow field organization inside the heat exchange fin 23, but also significantly improves the guidance and orderliness of the flue gas flow. As the flue gas flows in, each guide structure 233 can play its guiding role, smoothly guiding the flue gas to the corresponding spoiler structure 232, effectively avoiding turbulence and energy loss during the flue gas flow. At the same time, the presence of multiple spoiler structures 232 further aggravates the disturbance and mixing of the flue gas around the fin body 231, making the heat transfer process more sufficient and efficient. This design not only increases the contact area between the flue gas and the fin body 231, but also promotes the rapid exchange of heat between the flue gas and the fin, thereby improving the overall heat exchange efficiency.

[0098] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0099] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A water tank assembly (1), suitable for a gas water heater, characterized in that: The water tank assembly (1) comprises: The box body (10) is provided with a smoke cavity (10A), wherein the smoke cavity (10A) has a smoke inlet direction; and The heat exchanger (20) comprises a main heat exchange tube group (21) and a condenser tube group (22) which are sequentially arranged along the smoke inlet direction. The condenser tube group (22) comprises a plurality of condenser tubes (221). The plurality of condenser tubes (221) are sequentially arranged along the smoke inlet direction, and each of the condenser tubes (221) bends and extends in a direction forming an angle with the smoke inlet direction.

2. The water tank assembly (1) according to claim 1, characterized in that The box (10) has a first direction and a second direction perpendicular to the smoke inlet direction, and the first direction and the second direction are arranged at an angle; The condenser (221) comprises a plurality of straight segments (2211) and a plurality of curved segments (2212), wherein the straight segments (2211) extend along the first direction, and the plurality of straight segments (2211) are arranged at intervals along the second direction, and the curved segments (2212) are connected to adjacent straight segments (2211).

3. The water tank assembly (1) according to claim 1, characterized in that Along the smoke inlet direction, two adjacent condensation tubes (221) are at least partially arranged in a staggered manner.

4. The water tank assembly (1) according to claim 1, characterized in that The condenser (221) is a corrugated tube.

5. The water tank assembly (1) according to claim 1, characterized in that The box body (10) is provided with a condensation water inlet box (10a) and a condensation water outlet box (10b), and both ends of each condensation tube (221) are respectively connected to the condensation water inlet box (10a) and the condensation water outlet box (10b), so that the multiple condensation tubes (221) are arranged in parallel.

6. The water tank assembly (1) according to claim 5, characterized in that The condensation water inlet box (10a) and the condensation water outlet box (10b) are arranged on the same side wall of the box body (10).

7. The water tank assembly (1) according to claim 5, characterized in that The box body (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); the second side wall (12) is provided with a second main heat exchange water box (121); the main heat exchange tube group (21) comprises a plurality of first main heat exchange tubes (211); both ends of the plurality of first main heat exchange tubes (211) are respectively connected to the first main heat exchange water box (111) and the second main heat exchange water box (121); And at least one end of the first main heat exchange tube (211) is connected to the condensation water inlet box (10a).

8. The water tank assembly (1) according to claim 7, characterized in that The first main heat exchange water box (111) and the second main heat exchange water box (121) each include a plurality of them, and one first main heat exchange tube (211) is correspondingly connected to one first main heat exchange water box (111) and one second main heat exchange water box (121), so that the plurality of first main heat exchange tubes (211) are connected in series to form a series water path.

9. The water tank assembly (1) according to claim 7, characterized in that Along the smoke inlet direction, the plurality of first main heat exchange tubes (211) are provided in at least two rows, and the two rows of the first main heat exchange tubes (211) are arranged in a staggered manner.

10. The water tank assembly (1) according to claim 7, characterized in that The box body (10) further comprises a third side wall (13) and a fourth side wall (14) arranged opposite to each other along the smoke inlet direction, the third side wall (13) and the fourth side wall (14) being located between the first side wall (11) and the second side wall (12), and the box body (10) further comprises a smoke inlet (10B) communicating with the smoke cavity (10A); The first side wall (11) is further provided with a third main heat exchange water box (112), the second side wall (12) is further provided with a fourth main heat exchange water box (122), the main heat exchange tube group (21) further includes a plurality of second main heat exchange tubes (212), the plurality of second main heat exchange tubes (212) are located on a side of the plurality of first main heat exchange tubes (211) close to the smoke inlet (10B), the opposite ends of the plurality of second main heat exchange tubes (212) are respectively connected to the third main heat exchange water box (112) and the fourth main heat exchange water box (122), and at least one of the second main heat exchange tubes (212) is connected to the first main heat exchange water box (111); A plurality of the second main heat exchange tubes (212) are respectively arranged on the third side wall (13) and the fourth side wall (14).

11. The water tank assembly (1) according to claim 10, characterized in that The radial cross-section of the first main heat exchange tube (211) and / or the second main heat exchange tube (212) is elliptical, and the major axis of the ellipse extends along the smoke inlet direction.

12. The water tank assembly (1) according to any one of claims 1 to 11, characterized in that The heat exchanger (20) further comprises heat exchange fins (23), and the heat exchange fins (23) comprise: The fin body (231) has a thickness direction and is provided with a plurality of tube holes (2313) passing through along the thickness direction. The tube holes (2313) are used for the main heat exchange tube group (21) to pass through. Along the smoke inlet direction, the fin body (231) has an inflow end (231A) and an outflow end (231B); a flow-disturbing structure (232) connected to a side surface of the fin body (231) along the thickness direction, for blocking part of the smoke flowing toward the outflow end (231B); and A guide structure (233) is connected to the fin body (231) and is located on the same surface of the fin body (231) as the flow-disturbing structure (232). The guide structure (233) is located on a side of the flow-disturbing structure (232) close to the inflow end (231A) to guide the smoke toward the flow-disturbing structure (232).

13. The water tank assembly (1) according to claim 12, characterized in that The guiding structure (233) is an arched structure, and a guide channel (233A) extending along the smoke inlet direction is formed in the arched structure, and the flow-disturbing structure (232) is located at the outlet of the guide channel (233A).

14. The water tank assembly (1) according to claim 13, characterized in that The cross section of the guide channel (233A) is gradually reduced from the inflow end (231A) toward the outflow end (231B).

15. The water tank assembly (1) according to claim 13, characterized in that A first smoke outlet (2311) communicating with the guide channel (233A) is provided on a surface of the fin body (231) facing away from the guide structure (233).

16. The water tank assembly (1) according to claim 12, characterized in that The spoiler structure (232) comprises 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.

17. The water tank assembly (1) according to claim 16, characterized in that Projected along the smoke inlet direction, the projection surface of the spoiler ring (2321) is located inside the spoiler plate (2322).

18. The water tank assembly (1) according to claim 16, characterized in that A second smoke outlet (2312) communicating with the inner ring of the spoiler ring (2321) is provided on the surface of the fin body (231) facing away from the guide structure (233).

19. The water tank assembly (1) according to claim 12, characterized in that The heat exchange fin (23) further includes a closing piece (234), which is connected to a side surface of the fin body (231) in the thickness direction and is arranged around the circumference of the tube hole (2313).

20. The water tank assembly (1) according to claim 12, characterized in that The flow-disturbing structure (232) and the guide structure (233) are both provided in plurality, and one guide structure (233) is correspondingly located on one side of the flow-disturbing structure (232) close to the inflow end (231A).

21. A gas water heater, characterized in that: include: case; The water tank assembly (1) according to any one of claims 1 to 20, arranged in the housing; as well as The burner is arranged in the shell and can generate heat exchange flue gas flowing into the flue gas cavity (10A).

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