Heat exchanger and gas water heating device

Abstract

The utility model relates to heat exchange equipment technical field discloses heat exchanger and gas water heating equipment, and heat exchanger includes installation end plate, water collecting box and heat exchange pipe, and water collecting box includes box body and sealing cover, and the box body has the intercommunication cavity, first opening and second opening that communicate with each other, one end that the box body is equipped with first opening is sealedly connected with the second mounting port of installation end plate, and the one end that sealing cover and box body are equipped with second opening is detachably connected, and sealing cover is used for sealing second opening, and the end of heat exchange pipe is sealedly connected with the first mounting port of installation end plate, and is communicated with intercommunication cavity, and the outer diameter size of one end that box body is equipped with first opening is less than the outer diameter size of one end that box body is equipped with second opening, and the lateral wall of box body has limit structure, and limit structure annularly sets up in the circumference of box body, and the outer diameter size of limit structure is greater than the outer diameter size of one end that box body is equipped with first opening. The above-mentioned setting of the utility model effectively guarantees the assembly accuracy of installation end plate and water collecting box.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and more specifically, to a heat exchanger and a gas-fired hot water equipment. Background Technology

[0002] A heat exchanger is a device that enables heat transfer between fluid media. It mainly consists of an end plate, heat exchange tubes, baffles, and a water collection box. The baffles are located inside the heat exchange tubes to ensure uniform heat distribution and improve heat exchange efficiency. The water collection box is fixedly mounted on the end plate and connects to the ends of multiple heat exchange tubes to form a fluid passage between them. This allows water to flow between different heat exchange tubes, creating a complete heat exchange channel.

[0003] In existing structural designs, the mounting end plate needs to be assembled and welded to the water collection box to form a closed fluid channel and prevent leakage of the fluid medium. However, during the assembly of the mounting end plate and the water collection box, the water collection box is prone to move relative to the mounting end plate, causing gaps between the two and reducing the assembly accuracy of the mounting end plate and the water collection box. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a heat exchanger and a gas-fired hot water equipment that effectively ensures the assembly accuracy of the mounting end plate and the water collection box.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A heat exchanger includes a mounting end plate, a water collection box, and heat exchange tubes. The mounting end plate has two opposite sides with a first mounting port and a second mounting port that communicate with each other. The water collection box includes a box body and a sealing cover. The box body has a communicating cavity, a first opening, and a second opening, both of which communicate with the communicating cavity. The end of the box body with the first opening is sealed to the second mounting port. The sealing cover is detachably connected to the end of the box body with the second opening and is used to seal the second opening. The end of the heat exchange tube is sealed to the first mounting port and communicates with the communicating cavity. The outer diameter of the end of the box body with the first opening is smaller than the outer diameter of the end of the box body with the second opening. The outer wall of the box body has a limiting structure, which is annularly arranged around the outer periphery of the box body. The outer diameter of the limiting structure is larger than the outer diameter of the end of the box body with the first opening.

[0007] Compared with the prior art, the heat exchanger of this utility model has the following advantages: When the end of the box body with the first opening is connected to the second mounting port, the limiting structure can abut against the end face of the second mounting port. Since the outer diameter of the limiting structure is larger than the outer diameter of the end with the first opening, after the end face of the box body abuts against the second mounting port, the limiting structure restricts the box body from further penetrating into the second mounting port. Through this setting, the limiting structure can limit the box body, play a positioning role, and make the box body fit tightly with the mounting end plate, thereby effectively avoiding improper displacement of the box body when it is fitted with the mounting end plate, and also avoiding gaps between the mounting end plate and the water collection box, thus ensuring the stability and reliability of the connection between the box body and the mounting end plate, and ensuring the assembly accuracy of the box body and the mounting end plate.

[0008] In one embodiment, the end face of the sealing cap facing the second opening has an annular protrusion that passes through the second opening, and the outer wall of the annular protrusion abuts against the inner wall of the communicating cavity. The annular protrusion, by abutting against the inner wall of the communicating cavity, positions the sealing cap, thereby facilitating the assembly of the sealing cap and the box body.

[0009] In one embodiment, a sealing element is provided between the box body and the sealing cap. The sealing element is arranged around the annular protrusion and fits against the periphery of the second opening and the sealing cap respectively. This arrangement helps to ensure a good seal between the box body and the sealing cap, thereby helping to prevent fluid leakage.

[0010] In one embodiment, a sealing groove is provided on the end face of the sealing cap facing the second opening. The sealing groove is arranged around the annular protrusion, and at least a portion of the sealing element is embedded in the sealing groove. The sealing groove provides installation space for the sealing element, thereby facilitating the assembly of the sealing element and the sealing cap together with the housing. This ensures the accuracy of the sealing element's installation position, reduces the difficulty of installing the sealing element, and improves installation efficiency.

[0011] In one embodiment, one end of the housing with the first opening extends into the second mounting port, and the outer side wall of the end of the housing with the first opening fits against the inner side wall of the second mounting port. This arrangement creates a mating surface around the second mounting port between the housing and the mounting end plate, effectively preventing fluid leakage from the heat exchanger at the connection between the housing and the mounting end plate, thus ensuring the operational safety and long-term reliability of the heat exchanger.

[0012] In one embodiment, the outer wall of the end of the housing with the second opening is provided with a connecting lug. Both the connecting lug and the sealing cover are provided with connecting holes. The heat exchanger also includes fasteners that pass through the connecting holes to connect the housing and the sealing cover. By providing connecting holes in the connecting lugs and utilizing the connecting holes in the connecting lugs and the sealing cover, the connection between the housing and the sealing cover is facilitated, thereby achieving a detachable connection between the housing and the sealing cover.

[0013] In one embodiment, connecting lugs are positioned opposite each other on both sides of the housing, with the orientation of the two connecting lugs perpendicular to the arrangement direction of the multiple housings on the same mounting end plate. This arrangement allows the connecting holes and fasteners to work together to create a more sufficient tightening force and a more uniform fixing effect, thereby improving the stability and reliability of the connection structure between the housing and the sealing cover.

[0014] In one embodiment, the mounting end plate includes an end plate body and a connecting plate. Along a direction perpendicular to the extension of the heat exchange tubes, the end plate body has multiple first mounting ports, each corresponding to an end of a heat exchange tube. The connecting plate is connected to the end plate body, and the connecting plate has multiple mounting cavities arranged along a direction perpendicular to the extension of the heat exchange tubes. Each mounting cavity has two connecting ports and one second mounting port on each side. The two connecting ports on the same mounting cavity communicate with the second mounting port, and the connecting ports are sealed to the first mounting ports. The ends of every two adjacent heat exchange tubes are sealed to the two connecting ports respectively. Using this configuration, the mounting end plate is divided into an end plate body and a connecting plate, thereby effectively reducing the manufacturing difficulty and improving the manufacturing efficiency of the mounting end plate.

[0015] The above-mentioned technical problems can also be solved by the following technical solutions:

[0016] A gas-fired water heating device, comprising the heat exchanger described above.

[0017] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: The gas-fired water heater includes the heat exchanger provided in the above embodiment. When the heat exchanger is assembled, when the end of the box body with the first opening is connected to the second mounting port, the limiting structure can abut against the end face of the second mounting port. Since the outer diameter of the limiting structure is larger than the outer diameter of the end of the first opening, after the box body abuts against the end face of the second mounting port, the limiting structure restricts the box body from further penetrating into the second mounting port, thereby playing a positioning role for the box body and making the box body and the mounting end plate fit tightly together. This effectively avoids improper displacement of the box body when it is fitted with the mounting end plate, and also avoids gaps between the mounting end plate and the water collection box. This ensures the stability and reliability of the connection between the box body and the mounting end plate, and guarantees the assembly accuracy of the box body and the mounting end plate. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of the heat exchanger provided by this utility model is shown;

[0020] Figure 2 An exploded schematic diagram of a portion of the structure of the heat exchanger provided by this utility model is shown.

[0021] Figure 3 This invention provides a schematic diagram showing the structure of the connecting plate and the water collection box in conjunction.

[0022] Figure 4 This invention provides a structural schematic diagram showing the connection plate and water collection box from another perspective.

[0023] Figure 5 A cross-sectional view showing the connection plate and water collection box provided by this utility model are shown.

[0024] Figure 6 A schematic diagram of the mounting end plate provided by this utility model is shown;

[0025] Figure 7 This invention provides a schematic diagram of the mounting end plate from another perspective.

[0026] Figure 8 The diagram shows a schematic of the structure of the turbulence-disrupting plate and the heat exchange tube provided by this utility model.

[0027] The above figures include the following reference numerals:

[0028] 10. Install the end plate;

[0029] 11. First mounting port;

[0030] 12. Second mounting port;

[0031] 13. End plate body;

[0032] 14. Connecting plate;

[0033] 141. Install the cavity;

[0034] 142. Connection port;

[0035] 20. Water collection box;

[0036] 21. Box body;

[0037] 211. Connecting cavity;

[0038] 212. First opening;

[0039] 213. The second opening;

[0040] 214. Connecting lugs;

[0041] 22. Sealing cap;

[0042] 221. Annular protrusion;

[0043] 222. Sealing groove;

[0044] 23. Connecting hole;

[0045] 30. Sealing components;

[0046] 40. Limiting structure;

[0047] 50. Heat exchanger tubes;

[0048] 60. Spoiler plate. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0050] In the description of this application, it should be understood that the terms "center", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] In related technologies, during the assembly of the mounting end plate and the water collection box, the water collection box is prone to move relative to the mounting end plate, thereby reducing the assembly accuracy of the mounting end plate and the water collection box.

[0054] To solve the above problems, the following will combine... Figures 1 to 8 The following describes embodiments of the present invention.

[0055] like Figure 1 , Figure 2 and Figure 5 As shown, this embodiment of the present invention provides a heat exchanger, which includes a mounting end plate 10, a water collection box 20, and heat exchange tubes 50. The mounting end plate 10 has two opposite sides with interconnected first mounting ports 11 and second mounting ports 12. The water collection box 20 includes a box body 21 and a sealing cover 22. The box body 21 has a communicating cavity 211, a first opening 212, and a second opening 213, both of which communicate with the communicating cavity 211. One end of the box body 21 with the first opening 212 is sealed to the second mounting port 12. The sealing cover 22... 2. The end of the box body 21 with the second opening 213 is detachably connected. The sealing cover 22 is used to seal the second opening 213. The end of the heat exchange tube 50 is sealed to the first mounting port 11 and communicates with the communicating cavity 211. The outer diameter of the end of the box body 21 with the first opening 212 is smaller than the outer diameter of the end of the box body 21 with the second opening 213. The outer wall of the box body 21 has a limiting structure 40. The limiting structure 40 is arranged in a ring around the outer periphery of the box body 21. The outer diameter of the limiting structure 40 is larger than the outer diameter of the end of the box body 21 with the first opening 212.

[0056] In the embodiments of this application, when the end of the housing 21 with the first opening 212 is connected to the second mounting port 12, the limiting structure 40 can abut against the end face of the second mounting port 12. Since the outer diameter of the limiting structure 40 is larger than the outer diameter of the end of the first opening 212, after the end face of the housing 21 abuts against the second mounting port 12, the limiting structure 40 restricts the housing 21 from further penetrating into the second mounting port 12. With this arrangement, on the one hand, the limiting structure 40 can limit the housing 21, playing a positioning role, thereby effectively preventing improper displacement of the housing 21 when it mates with the mounting end plate 10, thus improving the assembly accuracy of the housing 21 and the second mounting port 12. On the other hand, the limiting structure 40 also ensures a tight fit between the end face of the housing 21 and the second mounting port 12, which helps to avoid gaps between the housing 21 and the second mounting port 12, preventing heat exchanger leakage. Meanwhile, the limiting structure 40 is distributed in a ring around the outer periphery of the box 21 so that the end face of the second mounting port 12 fits tightly with the box 21 in all directions, thereby improving the stability and reliability of the connection between the mounting end plate 10 and the box 21.

[0057] Furthermore, in the embodiments of this application, the mounting end plate 10 has a first mounting port 11 and a second mounting port 12 on both sides, and the water collection box 20 includes a box body 21 with a first opening 212, a communicating cavity 211, and a second opening 213 connected in sequence. The end of the heat exchange tube 50 is sealed to the mounting end plate 10 through the first mounting port 11, and the end of the shell with the first opening 212 is sealed to the second mounting port 12, thereby realizing the communication between the end of the heat exchange tube 50 and the communicating cavity 211. At the same time, the water collection box 20 also includes a sealing cover 22, which can block the second opening 213, thereby achieving the sealing of the second opening 213, and the sealing cover 22 can also be detachably connected to the end of the box body 21 with the second opening 213. Based on this, the sealing cover 22 and the box body 21 are respectively provided with a sealed state and a separated state. In the sealed state, the sealing cover 22 is connected to the box body 21 to close the second opening 213, forming a closed space of the heat exchanger, allowing the fluid to flow in the heat exchanger. In the separated state, the fluid inside the heat exchanger is emptied in advance, and the sealing cover 22 is separated from the box 21, so that the second opening 213 is connected to the external environment. At this time, maintenance personnel can directly observe the internal condition of the heat exchange tube 50 through the second opening 213 and the connecting cavity 211, and clean it according to the attachment of impurities on the heat exchange tube 50.

[0058] The detachable design between the housing 21 and the sealing cover 22 allows maintenance personnel to easily and conveniently inspect the interior of the heat exchanger and promptly clean any adhering impurities. This avoids the problem of difficult cleaning and maintenance caused by permanent fixed connections in existing technologies. Therefore, the aforementioned design of this application enables the heat exchanger to maintain good heat exchange efficiency even after long-term use, thereby extending the service life of the heat exchanger and ensuring its long-term reliability and maintainability.

[0059] like Figure 8 As shown, in other embodiments of this application, the heat exchanger further includes a baffle plate 60, which is disposed inside the heat exchange tube 50. Specifically, a slot may be provided inside the heat exchange tube 50, and the baffle plate 60 is inserted into the slot. With this arrangement, when the baffle plate 60 needs to be replaced, it is only necessary to separate the sealing cover 22 from the housing 21, pull the baffle plate 60 out of the heat exchange tube 50, and then install a new baffle plate 60. Furthermore, the detachable design of the baffle plate 60 also provides clearance for cleaning and maintenance of the heat exchange tube 50, thereby further facilitating the cleaning of scale and other impurities on the heat exchange tube 50.

[0060] like Figure 4 As shown, the end face of the sealing cover 22 facing the second opening 213 is provided with an annular protrusion 221, the annular protrusion 221 passes through the second opening 213, and the outer side wall of the annular protrusion 221 is in contact with the inner side wall of the communicating cavity 211.

[0061] In this embodiment, through the above-described configuration, the annular protrusion 221 can position the sealing cover 22 circumferentially, ensuring smooth contact between the sealing cover 22 and the end face of the second opening 213, thereby guaranteeing accurate connection between the sealing cover 22 and the box body 21. The annular protrusion 221 can also effectively limit the circumferential displacement of the sealing cover 22 caused by fluctuations in fluid pressure or thermal expansion and contraction. Furthermore, by extending the annular protrusion 221 into the inner wall of the second opening 213 and fitting against it, after the sealing cover 22 is connected to the box body 21, the annular protrusion 221 and the inner wall of the second opening 213 cooperate to form a sealing structure, thereby significantly improving the sealing reliability and connection stability between the box body 21 and the sealing cover 22.

[0062] like Figure 2 and Figure 5 As shown, a sealing element 30 is provided between the box body 21 and the sealing cover 22. The sealing element 30 is arranged around the annular protrusion 221 and is respectively attached to the periphery of the second opening 213 and the sealing cover 22.

[0063] In this embodiment, the sealing element 30 is disposed between the second opening 213 and the sealing cover 22, which effectively improves the sealing effect between the box body 21 and the sealing cover 22. Specifically, the sealing element 30 forms another sealing structure between the sealing cover 22 and the second opening 213. The elastic deformation of the sealing element 30 tightly fills the tiny gap between the periphery of the second opening 213 and the sealing cover 22, improving the sealing reliability of the connection between the box body 21 and the sealing cover 22. Furthermore, with the cooperation of the annular protrusion 221, the sealing element 30 can better fit the periphery of the second opening 213 and the sealing cover 22, which helps to ensure that the four sides of the sealing element 30 are in close contact with the periphery of the second opening 213 and the sealing cover 22, thereby avoiding the risk of local fluid leakage due to uneven force or pressure tilting of the sealing element 30. Meanwhile, when disassembling and maintaining the heat exchanger, the seal 30 can be removed along with the sealing cover 22 to replace aged or damaged seals 30 in a timely manner, maintaining a good long-term seal between the housing 21 and the sealing cover 22.

[0064] like Figure 5 As shown, the sealing cover 22 has a sealing groove 222 on the end face facing the second opening 213. The sealing groove 222 is arranged around the annular protrusion 221, and at least a portion of the sealing member 30 is embedded in the sealing groove 222.

[0065] In the embodiments of this application, the sealing groove 222 provides a receiving space for the sealing member 30. The sealing member 30 can be embedded in the sealing groove 222, thereby limiting the sealing member 30 along the extension direction of the box body 21 and constraining it in the circumferential direction, which helps to prevent the sealing member 30 from slipping off. Furthermore, the sealing groove 222 also provides appropriate deformation space for the sealing member 30, preventing excessive deformation of the sealing member 30 due to excessive interaction force between the end face of the second opening 213 and the sealing cover 22, thus preventing premature failure of the sealing member 30. In addition, the sealing groove 222 also provides a pre-installation space for the sealing member 30. Thus, the sealing member 30 can be placed in the sealing groove 222 first, and then assembled with the sealing cover 22 and the box body 21. This ensures the accuracy of the installation position of the sealing member 30, reduces the installation difficulty of the sealing member 30, and improves the installation efficiency of the sealing cover 22 and the box body 21.

[0066] like Figure 5 As shown, one end of the box body 21 with the first opening 212 extends into the second mounting port 12, and the outer side wall of the end of the box body 21 with the first opening 212 fits against the inner side wall of the second mounting port 12.

[0067] In this embodiment, through the above-described arrangement, one end of the first opening 212 is fitted to the second mounting port 12, forming a surface contact connection structure at the junction of the housing 21 and the mounting end plate 10. This creates a continuous, gapless sealing strip around the second mounting port 12 at the junction of the housing 21 and the mounting end plate 10, effectively preventing fluid leakage from the heat exchanger. Simultaneously, the formed surface contact connection structure enhances the structural strength of the junction between the housing 21 and the mounting end plate 10, enabling it to effectively resist water pressure fluctuations within the heat exchanger, chemical corrosion from scale buildup inside the heat exchanger, and thermal expansion and contraction due to temperature changes. This, in turn, improves the operational safety and long-term reliability of the heat exchanger.

[0068] In other embodiments of this application, the end face of one end of the first opening 212 may be fitted and connected to the end face of the second mounting port 12.

[0069] In other embodiments of this application, the outer side wall of the end of the box 21 with the first opening 212 and the inner side wall of the second mounting port 12 are both provided with sealing grooves. A sealing element is provided in the sealing groove on the outer side wall of the end of the first opening 212, and the sealing element protrudes from the outer side wall of the end of the box 21 with the first opening 212. With this arrangement, when the box 21 mates with the mounting end plate 10, the sealing element is deformed and squeezed into the second mounting port 12. As one end of the first opening 212 extends into the second mounting port 12, the sealing element engages with the sealing groove on the inner side wall of the second mounting port 12. The sealing element fills the space of the sealing groove on the inner side wall of the second mounting port 12. While forming an engagement between the box 21 and the mounting end plate 10, the sealing element also enhances the sealing performance at the connection between the mounting end plate 10 and the box 21, further improving the sealing reliability between the mounting end plate 10 and the box 21.

[0070] like Figure 4 and Figure 5 As shown, the outer side wall of the end of the box body 21 with the second opening 213 is provided with a connecting lug 214. Both the connecting lug 214 and the sealing cover 22 are provided with connecting holes 23. The heat exchanger also includes fasteners, which are inserted into the connecting holes 23 to connect the box body 21 and the sealing cover 22.

[0071] In this embodiment, by opening a connection hole 23 on the connecting lug 214 and using fasteners passing through the connection hole 23 on the connecting lug 214 and the sealing cover 22, the connection between the housing 21 and the sealing cover 22 is facilitated, thereby achieving a detachable connection between the housing 21 and the sealing cover 22. The cooperation between the fasteners and the connection hole 23 provides sufficient fastening force between the sealing cover 22 and the housing 21, and also provides the sealing cover 22 with stable anti-vibration displacement capability, enabling the sealing cover 22 to withstand water pressure fluctuations within the heat exchanger, effectively avoiding the risk of heat exchanger leakage due to loosening of the sealing cover 22. Simultaneously, the fastening force provided by the fasteners ensures that the sealing cover 22 can maintain a reliable fastening to the housing 21 even after multiple disassemblies and reassemblies, guaranteeing the long-term durability of the fastening between the sealing cover 22 and the housing 21. In addition, when the fasteners wear out or are damaged, the detachable design of the box body 21 and the sealing cover 22 allows for timely replacement of the fasteners, ensuring the tightness of the connection between the box body 21 and the sealing cover 22 under long-term connection.

[0072] In some embodiments of this application, the connecting hole 23 is provided with an internal thread, and the fastener includes a screw. The internal thread can cooperate with the screw to form a detachable connection between the sealing cover 22 and the box body 21. At the same time, it can also provide sufficient pre-tightening force between the box body 21 and the sealing cover 22, which can withstand the water pressure inside the heat exchanger, while also ensuring a tight fit between the box body 21 and the sealing cover 22, avoiding the risk of leakage from the heat exchanger.

[0073] In other embodiments of this application, the fastener includes a fastening pin. The diameter of the connecting hole 23 provided on the connecting lug 214 is smaller than the diameter of the connecting hole 23 provided on the sealing cover 22. The fastening pin passes through the connecting hole 23 of the sealing cover 22 and the connecting hole 23 of the connecting lug 214 respectively, so as to realize the pin hole fit between the connecting lug 214 and the sealing cover 22.

[0074] like Figures 3 to 5 As shown, the connecting lugs 214 are arranged opposite each other on both sides of the box body 21, and the arrangement direction of the two connecting lugs 214 is perpendicular to the arrangement direction of the multiple boxes 21 of the same mounting end plate 10.

[0075] In this embodiment, the connecting lugs 214 are positioned opposite each other on both sides of the housing 21. After the housing 21 and the sealing cover 22 are connected by fasteners, on the one hand, the fasteners located on both sides of the housing 21 can provide more sufficient tightening force and fixing effect; on the other hand, a uniform and collinear tension force is formed on the symmetrical sides of the sealing cover 22, so that the sealing cover 22 is subjected to a more comprehensive compressive force. This further improves the sealing cover 22's resistance to vibration and water pressure fluctuations, while also preventing fluid leakage or sealing failure caused by local warping of the sealing cover 22. Thus, the stability and reliability of the connection structure between the housing 21 and the sealing cover 22 are improved.

[0076] Furthermore, the orientation of the two connecting lugs 214 is perpendicular to the arrangement direction of the multiple boxes 21 on the same mounting end plate 10, so that the installation position of the fastener does not conflict with the spatial arrangement of the multiple boxes 21, thereby providing sufficient space for the operator to install and disassemble, making it convenient for the operator to use tools for installation and maintenance, and avoiding narrow installation space due to factors such as the arrangement of the boxes 21, which could cause the fastener to be misaligned or unevenly stressed.

[0077] like Figure 6 and Figure 7 As shown, the mounting end plate 10 includes an end plate body 13 and a connecting plate 14. Along the extension direction perpendicular to the heat exchange tube 50, the end plate body 13 is provided with a plurality of first mounting ports 11, each of which corresponds to the end of the heat exchange tube 50. The connecting plate 14 is connected to the end plate body 13. The connecting plate 14 is arranged with a plurality of mounting cavities 141 along the extension direction perpendicular to the heat exchange tube 50. Each mounting cavity 141 has two connecting ports 142 and a second mounting port 12 on opposite sides. The two connecting ports 142 on the same mounting cavity 141 are interconnected with the second mounting port 12, and the connecting ports 142 are sealed to the first mounting ports 11. The ends of each pair of adjacent heat exchange tubes 50 are sealed to the two connecting ports 142 respectively.

[0078] In this embodiment, the mounting end plate 10 adopts a split design, that is, the mounting end plate 10 is divided into an end plate body 13 and a connecting plate 14. This setting can reduce the manufacturing difficulty of the mounting end plate 10, thereby improving the production efficiency of the mounting end plate 10. Based on this, along the extension direction perpendicular to the heat exchange tube 50, the end plate body 13 is provided with a plurality of first mounting ports 11, and the connecting plate 14 has a plurality of mounting cavities 141, and each mounting cavity 141 is provided with two connecting ports 142 and a second mounting port 12 on both sides. With the above arrangement, after the end of the heat exchange tube 50 is engaged with the first mounting port 11, the ends of every two heat exchange tubes 50 can be connected through the mounting cavity 141, thereby realizing the transfer of fluid between adjacent heat exchange tubes 50. Furthermore, after one end of the first opening 212 is sealed and connected to the connecting plate 14, the end of the heat exchange tube 50 is also connected to the connecting cavity 211, thereby realizing the transfer of fluid in the heat exchanger.

[0079] like Figures 1 to 4 as well as Figure 8As shown, the heat exchanger includes two mounting end plates 10, which are arranged at intervals relative to each other. A housing 21 connects two adjacent heat exchange tubes 50, allowing multiple heat exchange tubes 50 to be sequentially connected end-to-end through the two mounting end plates 10 and the housings 21. In this embodiment, one mounting end plate 10 is connected to the inlet, and the other mounting end plate 10 is connected to the outlet. Multiple heat exchange tubes 50 and multiple housings 21 cooperate to form a heat exchange channel, enabling fluid flow and heat exchange. With this configuration, during heat exchanger maintenance, removing a sealing cover 22 allows direct inspection of the internal condition of the two heat exchange tubes 50, increasing maintenance efficiency and convenience. Multiple heat exchange tubes 50 are connected end to end through the housing 21 to form an "S"-shaped continuous series flow path, so that the fluid flows through each heat exchange tube 50 in sequence, thereby extending the length of heat exchange of the fluid. This is conducive to the uniform transfer and diffusion of heat along the entire flow path, so as to improve the overall heat exchange efficiency of the heat exchanger.

[0080] This utility model embodiment also provides a gas-fired water heating device, which includes the water heater provided in the above embodiment. Using the gas-fired water heating device provided in this application, when the gas-fired water heating device needs inspection or maintenance, workers can inspect the inside of the heat exchanger through the detachable connection between the housing 21 and the sealing cover 22. Specifically, workers can remove the sealing cover 22 from the housing 21 and directly observe the inside of the heat exchange tube 50 through the communicating cavity 211. They can then specifically clean and maintain the heat exchange tube 50 based on the scale and other impurities adhering to it, thereby effectively ensuring the heat exchange efficiency of the water heater and ensuring the efficient operation of the gas-fired water heating device.

[0081] The technical solution of this application has at least the following advantages:

[0082] 1. The detachable design of the housing 21 and the sealing cover 22 allows operators to easily clean impurities attached to the heat exchange tube 50, maintain good heat exchange efficiency of the heat exchanger, and extend the service life of the heat exchanger.

[0083] 2. The outer side wall of the box body 21 with the first opening 212 abuts against the inner side wall of the second mounting port 12, forming a sealing structure between the mounting end plate 10 and the box body 21. This ensures the sealing performance at the connection between the mounting end plate 10 and the box body 21, while also improving the connection strength at the connection between the mounting end plate 10 and the box body 21 to resist fluid pressure fluctuations.

[0084] 3. The outer wall of the annular protrusion 221 of the sealing cover 22 fits against the inner wall of the end of the box body 21 with the second opening 213, and a sealing element 30 is provided between the end face of the second opening 213 and the sealing cover 22, forming a sealed space of the heat exchanger and forming two sealing structures between the sealing cover 22 and the box body 21, which effectively enhances the sealing effect between the sealing cover 22 and the box body 21 and improves the sealing performance of the heat exchanger.

[0085] 4. The limiting structure 40 provided on the box body 21 not only achieves effective positioning of the box body 21, but also improves the assembly accuracy of the box body 21 and the mounting end plate 10, and improves the installation efficiency of the box body 21 and the mounting end plate 10. In addition, the limiting structure 40 also makes the end face of the second mounting port 12 fit tightly with the outer side wall of the end of the box body 21 with the second opening 213, further enhancing the connection effect between the box body 21 and the mounting end plate 10.

[0086] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0087] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes: Mounting end plate (10), the two opposite sides of the mounting end plate (10) have a first mounting port (11) and a second mounting port (12) that are interconnected. A water collection box (20) includes a box body (21) and a sealing cover (22). The box body (21) has a communicating cavity (211), a first opening (212) and a second opening (213). The first opening (212) and the second opening (213) are both communicating with the communicating cavity (211). The end of the box body (21) with the first opening (212) is sealed to the second mounting port (12). The sealing cover (22) is detachably connected to the end of the box body (21) with the second opening (213). The sealing cover (22) is used to seal the second opening (213). Heat exchange tube (50), the end of which is sealed to the first mounting port (11) and communicates with the communicating cavity (211); The outer diameter of the end of the box body (21) with the first opening (212) is smaller than the outer diameter of the end of the box body (21) with the second opening (213). The outer wall of the box body (21) has a limiting structure (40), which is arranged in a ring around the outer periphery of the box body (21). The outer diameter of the limiting structure (40) is larger than the outer diameter of the end of the box body (21) with the first opening (212).

2. The heat exchanger according to claim 1, characterized in that, The sealing cap (22) has an annular protrusion (221) on its end face facing the second opening (213). The annular protrusion (221) passes through the second opening (213), and the outer side wall of the annular protrusion (221) is in contact with the inner side wall of the communicating cavity (211).

3. The heat exchanger according to claim 2, characterized in that, A sealing element (30) is provided between the box body (21) and the sealing cover (22). The sealing element (30) is arranged around the annular protrusion (221) and is respectively attached to the periphery of the second opening (213) and the sealing cover (22).

4. The heat exchanger according to claim 3, characterized in that, The sealing cap (22) has a sealing groove (222) on its end face facing the second opening (213). The sealing groove (222) is arranged around the annular protrusion (221), and at least a portion of the sealing element (30) is embedded in the sealing groove (222).

5. The heat exchanger according to claim 1, characterized in that, The end of the box body (21) with the first opening (212) extends into the second mounting port (12), and the outer side wall of the end of the box body (21) with the first opening (212) fits against the inner side wall of the second mounting port (12).

6. The heat exchanger according to claim 1, characterized in that, The outer side wall of the end of the box body (21) with the second opening (213) is provided with a connecting lug (214). Both the connecting lug (214) and the sealing cover (22) are provided with connecting holes (23). The heat exchanger also includes fasteners, which are inserted into the connecting holes (23) to connect the box body (21) and the sealing cover (22).

7. The heat exchanger according to claim 6, characterized in that, The connecting lugs (214) are arranged opposite each other on both sides of the housing (21), and the arrangement direction of the two connecting lugs (214) is perpendicular to the arrangement direction of the multiple housings (21) of the same mounting end plate (10).

8. The heat exchanger according to claim 1, characterized in that, The mounting end plate (10) includes: The end plate body (13) is provided with a plurality of first mounting ports (11) along the extension direction perpendicular to the heat exchange tube (50), and the first mounting ports (11) are provided one-to-one with the ends of the heat exchange tube (50). A connecting plate (14) is connected to the end plate body (13). The connecting plate (14) has multiple mounting cavities (141) arranged along the extension direction perpendicular to the heat exchange tube (50). Each mounting cavity (141) has two connecting ports (142) and a second mounting port (12) on its opposite sides. The two connecting ports (142) on the same mounting cavity (141) are connected to the second mounting port (12), and the connecting ports (142) are sealed to the first mounting port (11) one by one. The ends of each two adjacent heat exchange tubes (50) are sealed to the two connecting ports (142) one by one.

9. A gas-fired hot water device, characterized in that, The gas-fired hot water equipment includes the heat exchanger as described in any one of claims 1 to 8.

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