Heat exchanger plate heat exchanger

Abstract

The application provides a heat exchange network plate heat exchanger, which comprises a group of heat exchange copper pipes, a fin group, two side frame plates, two connecting rods, an inlet pipe and an outlet pipe; the fin group is composed of a plurality of uniformly distributed fins, the fins are arranged at intervals along the axial direction of the heat exchange copper pipes, each fin comprises a fin main body and a plurality of sleeve bodies arranged on one side of the fin main body, the heat exchange copper pipes are arranged in the through holes of the sleeve bodies and are fixedly connected through expansion; a turbulence tooth rim is arranged on the outer edge of the fin; the two side frame plates are arranged on the two sides of the fin group respectively and are used for axially limiting the fin group; the two connecting rods are arranged one above the other and penetrate through the fins of the fin group and are fixedly connected with the two side frame plates at the two ends. The application has compact structure, can enhance the structural stability of the heat exchanger during transportation, installation and operation, and can better overcome the problems of fin dislocation, loosening and expansion failure.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment technology, and in particular to a heat exchanger with a heat exchange network plate. Background Technology

[0002] In urban district heating, regional energy stations, and large-scale industrial waste heat recovery systems, heat exchangers are key equipment for heat transfer, and their performance directly affects the efficiency and stability of the entire heating system. As heating systems increasingly demand energy conservation and emission reduction, heat exchangers are gradually evolving towards more compact structures, higher heat exchange efficiency, easier installation, and more reliable operation. In this technological evolution, copper tube finned structures have gained widespread application due to their superior heat transfer performance and strong pressure resistance.

[0003] Existing copper tube finned heat exchangers typically consist of multiple parallel-arranged copper tubes and horizontally positioned fins. The fins are connected to the copper tubes via mechanical pressing or expansion to enhance convective heat transfer on the air side. A liquid heat transfer medium flows inside the copper tubes, while the fins expand the heat exchange area externally, and heat transfer is achieved through air or water cooling. Additionally, to prevent loosening of the fin assembly during operation or transportation, some designs incorporate external supports or mounting brackets.

[0004] However, in the aforementioned traditional structure, the fixation of the fin assembly in the axial direction of the copper tube remains significantly inadequate. Especially during operation, vibration, thermal expansion and contraction, or handling, the fins are prone to axial displacement, leading to problems such as fin misalignment and poor contact. This not only affects heat exchange efficiency but may also cause loosening at the expansion joints, reducing structural stability and service life. Utility Model Content

[0005] This application provides a heat exchanger with a heat network plate to solve the problem of axial loosening of the fin assembly during operation.

[0006] This application provides a heat exchanger with a heat exchanger plate, including a set of heat exchange copper tubes, a fin assembly, two side frame plates, two connecting rods, an inlet pipe and an outlet pipe;

[0007] The heat exchange copper tube is welded from multiple straight pipe sections and multiple U-shaped connecting bends, forming a continuous serpentine internally connected single heat exchange channel. The fin assembly consists of multiple evenly distributed fins, which are spaced apart along the axial direction of the heat exchange copper tube. Each fin includes a fin body and multiple collars disposed on one side of the fin body. The heat exchange copper tube passes through the through holes of the collars and is fixedly connected by an expansion joint. The outer edge of the fin is provided with a turbulence-inducing toothed edge. Two side frame plates are respectively disposed on both sides of the fin assembly for axial positioning of the fin assembly. Two connecting rods pass through each fin of the fin assembly, one above the other, and are fixedly connected at both ends to the two side frame plates. The liquid inlet pipe and the liquid outlet pipe are respectively connected to the inlet end and the outlet end of the heat exchange copper tube.

[0008] In one optional embodiment, the heat exchange copper tube is made of deoxidized copper material, and the inner diameter of each straight tube section is 6-10 mm and the wall thickness is 0.5-1.0 mm.

[0009] In one optional embodiment, the U-shaped connecting bend is welded to the straight pipe section, and each U-shaped connecting bend is located at a turning point of the heat exchange copper pipe structure.

[0010] In one optional embodiment, the fin is made of aluminum alloy with a thickness of 0.1 to 0.3 mm, and the collar body and the fin body are integrally stamped.

[0011] In one optional embodiment, the turbulence-causing teeth are serrated or wavy structures evenly distributed along the outer edge of the fin.

[0012] In one alternative implementation, the turbulence-causing teeth of two adjacent fins are arranged in an alternating pattern.

[0013] In one optional embodiment, the connecting rod is a cylindrical metal rod, and the two connecting rods are arranged parallel to each other vertically, with both ends of the connecting rods connected to the two side frame plates by threaded fastening or welding.

[0014] In one optional embodiment, the inlet pipe and outlet pipe are provided with connecting flange structures or threaded connectors.

[0015] In one alternative embodiment, the two side frame plates are made of one-piece molded stainless steel or carbon steel material, and have multiple bolt holes on the edges for installation.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] 1. This application provides a heat exchanger with a heat exchanger plate. The heat exchange copper tubes are welded together from multiple straight tube sections and multiple U-shaped connecting bends, arranged in a serpentine continuous pattern to form a single heat exchange flow channel. Because the fluid needs to pass through multiple bends in this channel, its contact area on the inner wall of the copper tube is increased, the flow path is effectively extended, and the residence time is correspondingly increased. During this process, the number of heat exchangers increases, which is beneficial for sufficient heat transfer between the heat exchange medium and the tube wall. Compared with the traditional straight flow channel arrangement, this structure can achieve a longer flow length, thereby improving the heat exchange utilization rate. Furthermore, the single-channel structure avoids the problem of uneven flow velocity distribution caused by multi-channel flow splitting, thus helping to maintain the overall heat exchange efficiency of the system.

[0018] 2. In this application, the fins of the fin assembly are arranged at intervals along the axial direction of the heat exchange copper tube. Each fin is provided with multiple collars that match the outer diameter of the heat exchange copper tube, and are fixedly connected to the heat exchange copper tube by expansion joints to form a tight contact relationship. This assembly method helps to improve processing efficiency and enhance the structural stability of the fins during use. Moreover, in the fin assembly, the fins are arranged at a certain interval, forming a relatively uniform airflow channel, which helps to form stable forced convection between the fins, thereby enhancing the heat transfer efficiency of the fin surface. At the same time, the outer edge of the fin is provided with a turbulence tooth edge. When air flows over its surface, this structure can break the stability of the original boundary layer, enhance fluid turbulence, thereby improving the heat transfer conditions on the fin surface and helping to promote the diffusion of heat to the surrounding air.

[0019] 3. In this application, each fin in the fin assembly is connected to the heat exchange copper tube via an expansion joint with a collar. This connection method not only achieves tight thermal conductivity between the heat exchange copper tube and the fin, but also utilizes the radial expansion force of the expansion structure itself to provide a certain degree of frictional locking force in the fin axial direction, thereby limiting the axial slippage tendency of the fin during use. Simultaneously, the collar is pre-designed with a uniform length during manufacturing, naturally forming a regular interval between the fins after expansion. This creates a stable arrangement with self-positioning and self-limitation at the structural level, resulting in a highly ordered and stable fin assembly, which helps to avoid poor contact caused by localized dense packing or loose fins. Furthermore, two connecting rods, positioned vertically, penetrate each fin and form reliable fixed connections with the side frame plates at both ends, constituting a stable load-bearing frame system. The two side frame plates act as rigid stops on both sides of the fin assembly, constraining the entire fin assembly. This structure not only enhances the positioning stability of the fins but also makes the stress on each fin more balanced during operation, reducing the risk of warping and dislocation caused by pipe thermal expansion and contraction or system vibration. The presence of the upper and lower connecting rods also gives the device better overall rigidity and fatigue resistance, helping to maintain the flat layout of the fin assembly and good contact quality at the expansion joints during long-term operation. This embodiment, through the design and combination of the above structures, and the combined effect of multiple mechanisms such as collar body expansion friction, spacing self-limiting, connecting rod penetration and fixing, and side frame plate stop constraints, enhances the structural stability of the heat exchanger during transportation, installation, and operation, effectively overcoming the problems of fin misalignment and loosening and expansion joint failure, thereby improving overall reliability and service life. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a heat exchanger with a heat network plate provided in an embodiment of this application;

[0022] Figure 2 An exploded view of a heat exchanger with a heat network plate provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of a heat exchanger with a heat network plate type provided in an embodiment of this application after the fin assembly has been removed.

[0024] Figure 4 This is a schematic diagram of the structure of a fin provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100 - Heat exchange copper tube; 110 - Straight pipe section; 120 - U-shaped connecting bend; 200 - Fin assembly; 201 - Turbulence tooth edge; 210 - Fin; 211 - Fin body; 212 - Collar; 300 - Side frame plate; 301 - Bolt hole; 400 - Liquid inlet pipe; 500 - Liquid outlet pipe; 600 - Connecting rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0029] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Please see Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of a heat exchanger with a heat network plate provided in an embodiment of this application; Figure 2 An exploded view of a heat exchanger with a heat network plate provided in an embodiment of this application; Figure 3 This is a schematic diagram of a heat exchanger with a heat network plate type provided in an embodiment of this application after the fin assembly has been removed. Figure 4 This is a schematic diagram of the structure of a fin provided in one embodiment of this application. Figures 1-4 As shown in the figure, this application provides a heat exchanger with a heat exchanger plate, including a set of heat exchange copper tubes 100, a fin group 200, two side frame plates 300, two connecting rods 600, an inlet pipe 400 and an outlet pipe 500.

[0032] The heat exchange copper tube 100 is welded from multiple straight tube sections 110 and multiple U-shaped connecting bends 120, forming a continuous serpentine internally connected single heat exchange channel; the fin assembly 200 consists of multiple evenly distributed fins 210, with each fin 210 spaced apart along the axial direction of the heat exchange copper tube 100. Each fin 210 includes a fin body 211 and multiple collar bodies 212 disposed on one side of the fin body 211. The heat exchange copper tube 100 passes through the through holes of the collar bodies 212 and is fixedly connected by expansion joints. The outer edge of the fin 210 is provided with... The fin assembly 200 has a turbulence-inducing toothed edge 201; two side frame plates 300 are respectively disposed on both sides of the fin assembly 200 to axially limit the fin assembly 200; two connecting rods 600 pass through each fin 210 of the fin assembly 200, one above the other, and are fixedly connected to the two side frame plates 300 at both ends; the liquid inlet pipe 400 and the liquid outlet pipe 500 are respectively connected to the inlet end and the outlet end of the heat exchange copper tube 100. Specifically, one end of the liquid inlet pipe 400 and the liquid outlet pipe 500 can be welded to the inlet end and the outlet end of the heat exchange copper tube 100, respectively.

[0033] The heat exchanger provided in this embodiment uses a heat exchange copper tube 100 welded from multiple straight tube sections 110 and multiple U-shaped connecting bends 120, arranged in a serpentine continuous pattern to form a single heat exchange flow channel. Because the fluid needs to pass through multiple bends in this channel, its contact area on the inner wall of the copper tube increases, the flow path is effectively extended, and the residence time increases accordingly. During this process, the number of heat exchangers increases, which is beneficial for sufficient heat transfer between the heat exchange medium and the tube wall. Compared to the traditional straight-line flow channel arrangement, this structure can achieve a longer flow length, thereby improving the heat exchange utilization rate. Furthermore, the single-channel structure avoids the problem of uneven flow velocity distribution caused by multi-channel flow splitting, thus helping to maintain the overall heat exchange efficiency of the system.

[0034] Meanwhile, in this embodiment, the fins 210 of the fin assembly 200 are arranged at intervals along the axial direction of the heat exchange copper tube 100. Each fin 210 is provided with multiple collars 212 that match the outer diameter of the heat exchange copper tube 100, and is fixedly connected to the heat exchange copper tube 100 by expansion joint, forming a tight contact relationship. This assembly method helps to improve processing efficiency and enhance the structural stability of the fins 210 during use. Moreover, in the fin assembly 200, the fins 210 are arranged at a certain interval, forming a relatively uniform airflow channel, which helps the external airflow to form stable forced convection between the fins, thereby enhancing the heat transfer efficiency of the fin surface. At the same time, the outer edge of the fin is provided with a turbulence tooth edge 201. When air flows over its surface, this structure can break the stability of the original boundary layer, enhance fluid turbulence, thereby improving the heat transfer conditions of the fin surface and helping to promote the diffusion of heat to the surrounding air.

[0035] Furthermore, in this embodiment, each fin 210 in the fin assembly 200 is connected to the heat exchange copper tube 100 by an expansion joint 212. This connection method not only achieves a tight thermal conductive contact between the heat exchange copper tube 100 and the fin 210, but also utilizes the radial expansion force of the expansion joint structure itself to provide a certain degree of frictional locking force in the axial direction of the fin 210, thereby limiting the axial slippage tendency of the fin during use. At the same time, the collar 212 is pre-designed with a uniform length during manufacturing, and after expansion, it naturally forms a regular interval between the fins 210, forming a stable arrangement with self-positioning and self-limitation at the structural level. This makes the fin assembly 200 present a highly ordered and stable arrangement, which helps to avoid poor contact caused by local dense packing or loosening of the fins 210. Furthermore, two connecting rods 600, positioned vertically, penetrate each fin 210 and form reliable fixed connections with the side frame plates 300 at both ends, constituting a stable load-bearing frame system. The two side frame plates 300 form rigid stops on both sides of the fin assembly 200, constraining the entire fin assembly 200. This structure not only enhances the positioning stability of the fins 210 but also makes the force on each fin more balanced during operation, reducing the risk of warping and dislocation caused by thermal expansion and contraction of the pipeline or system vibration. The presence of the upper and lower connecting rods also gives the device better overall rigidity and fatigue resistance, helping to maintain the flat layout of the fin assembly 200 and maintain good contact quality at the expansion joints during long-term operation. This embodiment, through the design and combination of the above-mentioned structures, enhances the structural stability of the heat exchanger during transportation, installation and operation through the combined effects of multiple mechanisms such as the expansion friction of the collar body 212, the self-limiting of the spacing, the through-connection and fixing of the connecting rod 600, and the stop constraint of the side frame plate 300. It effectively overcomes the problems of fin misalignment and loosening and expansion failure, thereby improving the overall reliability and service life.

[0036] In some embodiments, the heat exchange copper tube 100 is made of deoxidized copper material, and the inner diameter of each straight tube section 110 is 6 to 10 mm and the wall thickness is 0.5 to 1.0 mm.

[0037] In this embodiment, deoxidized copper is selected as the raw material for the heat exchange copper tube 100. Its excellent thermal conductivity and strong corrosion resistance ensure stable structural performance under high temperature and pressure conditions. The extremely low oxygen content in deoxidized copper effectively reduces corrosion damage caused by oxidation reactions in high-temperature media. Furthermore, regarding the structure of the heat exchange copper tube 100, the inner diameter and wall thickness parameters of the straight pipe section 110 are limited. Specifically, the inner diameter of the straight pipe section is set to a range of 6 to 10 mm, which helps to increase the contact area between the fluid and the pipe wall while maintaining a certain flow capacity, thereby promoting effective heat exchange at the interface. The wall thickness is set between 0.5 and 1.0 mm, which, while considering mechanical strength, avoids increased thermal resistance or material waste due to excessive wall thickness, thus improving the utilization efficiency of the copper material.

[0038] In some embodiments, the U-shaped connecting bend 120 and the straight pipe section 110 are connected by welding, and each U-shaped connecting bend 120 is located at the structural turning point of the heat exchange copper pipe 100.

[0039] In this embodiment, the U-shaped connecting bend 120 is connected to the straight pipe section 110 by welding, which forms a continuous and tight connection interface in the structure, which is beneficial to improving the overall sealing strength and mechanical stability of the heat exchange copper tube 100. The welding fixing method has stronger vibration resistance and thermal expansion and contraction resistance, which helps to reduce the risk of leakage.

[0040] Furthermore, during the serpentine arrangement of the heat exchange copper tubes 100, each U-shaped connecting bend 120 is uniformly placed at the turning points of the structure, ensuring a clear directional change in the flow path at each turning point. This tube arrangement not only helps to construct a uniform and continuous heat exchange path but also makes subsequent welding operations more centralized and standardized, reducing problems caused by misalignment and cross-interference of tube segments during assembly. Through standardized structural design, the internal fluid flows more smoothly in the transition area, which can reduce local eddies and energy loss to a certain extent, thus positively impacting overall heat exchange efficiency.

[0041] In some embodiments, the fin 210 is made of aluminum alloy with a thickness of 0.1 to 0.3 mm, and the collar 212 and the fin body 211 are integrally stamped structures.

[0042] In the above embodiments, further optimization of the material and manufacturing method of the fins 210 aims to improve heat transfer performance and structural stability. The fins 210 are made of aluminum alloy, which has high thermal conductivity, facilitating the formation of a more efficient heat transfer channel between the heat exchange copper tube 100 and the surrounding air. Under heat load, heat can diffuse more rapidly along the fins 210, thereby enhancing the overall heat transfer response.

[0043] Meanwhile, in this embodiment, the thickness of the fins 210 is set between 0.1 and 0.3 mm. This size range reduces the fin mass while maintaining a certain mechanical support capacity, which has a positive effect on reducing the overall weight of the device. Thinner fins can also effectively reduce airflow resistance, which helps to improve the heat exchange effect under natural or forced convection. In addition, the fin body 211 and the collar 212 are integrally formed by stamping. Compared with later welding or riveting methods, structural positioning and deformation control can be achieved directly during the processing stage, enhancing its compatibility with the expansion joint of the heat exchange copper tube 100.

[0044] Through the above structural optimization, the fins 210 can maintain a more stable contact with the heat exchange copper tubes 100 during operation, reducing loosening or thermal resistance fluctuations caused by thermal expansion and contraction. Overall, this integrated molding method not only improves assembly efficiency but also helps to improve the bonding strength and heat conduction consistency of the fin assembly 200, which is of positive significance for the long-term stable operation of the heat exchanger.

[0045] In some embodiments, the turbulence-causing edge 201 is a sawtooth or wave-shaped structure evenly distributed along the outer edge of the fin 210.

[0046] In this embodiment, the turbulence-distributing toothed edge 201 adopts a serrated or wavy structure with equal spacing. This structure is composed of multiple serrated units with equal amplitude and period. Optionally, the tooth height of each tooth unit is 1.5 to 2.5 times the fin thickness, and the tooth pitch is smaller than the row spacing of adjacent fins 210, thereby generating a strong local disturbance effect when the airflow passes through. During the contact with air, the turbulence-distributing toothed edge 201 can break the quasi-steady boundary layer formed along the fin surface, so that the airflow forms a continuous disturbance vortex when passing through the inter-fin channel. This process can significantly increase the disturbance intensity of the airflow in the near-wall region, thereby improving the turbulent kinetic energy exchange efficiency and helping to improve the thermal convection environment on the surface of the fin 210. Unlike the straight-edge fins or unstructured toothed edges commonly found in the prior art, the turbulence-distributing toothed edge 201 in this embodiment adopts a regular arrangement and appropriate parameter control in its structure, so that the turbulence-distributing toothed edge 201 no longer only plays an edge disturbance role, but forms a wavy interface that continuously disturbs the airflow throughout the entire channel.

[0047] In some embodiments, the turbulence teeth 201 of two adjacent fins 210 are arranged alternately.

[0048] In this embodiment, the turbulence-causing edges 201 on adjacent fins 210 are designed in a staggered arrangement, breaking the repetitive and consistent edge morphology in the axial direction. This staggered arrangement causes air to be disturbed to varying degrees as it passes through the gaps between adjacent fins, resulting in a deflection of the airflow path and the formation of a more complex vortex structure between the fins 210. Due to the irregular change in the streamline direction, the scouring effect generated when the airflow contacts the surface of the fins 210 is enhanced, which helps to improve the heat transfer efficiency between the fins 210 and the air, thereby improving the heat exchange capacity between the heat exchange copper tube 100 and the ambient gas.

[0049] In some embodiments, the connecting rod 600 is a cylindrical metal rod, and the two connecting rods 600 are arranged in parallel vertically, and the two ends of the connecting rod 600 are connected to the two side frame plates 300 by thread fastening or welding.

[0050] In this embodiment, the connecting rod 600 is a cylindrical metal rod, arranged in parallel vertically, passing through the fin assembly 200 and connecting to the two side frame plates 300 at both ends. In the specific connection, threaded fastening or welding can be selected according to actual needs to improve the stability of the connection. The double-rod arrangement maintains the neatness and stability of the overall shape of the fin assembly 200 during subsequent transportation and operation, reducing displacement and structural disturbance caused by vibration or thermal expansion and contraction. Especially in heat exchange conditions with frequent high-temperature cycles, this type of structural support plays a stabilizing role in maintaining the relative positional relationship between components.

[0051] In some embodiments, the inlet pipe 400 and the outlet pipe 500 are provided with connecting flange structures or threaded connectors.

[0052] This embodiment features connecting flange structures or threaded connectors on the inlet pipe 400 and outlet pipe 500. This aims to improve the ease of connection and compatibility between the heat exchanger and the external piping system, allowing for flexible selection based on the operating environment. Specifically, using a flange structure meets the common flange-to-flange installation requirements of large-scale heat network systems, offering good connection accuracy and sealing performance, which facilitates faster equipment assembly and subsequent disassembly. Threaded connectors are more suitable for small to medium-sized heat exchange applications, enabling reliable connections without relying on welding, thus simplifying on-site construction procedures. Furthermore, at the end of the equipment's operating cycle or when periodic maintenance is required, these interfaces allow for quicker cleaning operations, reducing maintenance intensity.

[0053] In some embodiments, the two side frame plates 300 are made of one-piece molded stainless steel or carbon steel material plates, and the edges are provided with a plurality of bolt holes 301 for installation.

[0054] In this embodiment, the side frame plate 300 is made of one-piece molded stainless steel plate or carbon steel plate, and multiple bolt holes 301 for installation are provided on its edge. From the perspective of structural design, the overall rigidity of the side frame plate 300 is effectively improved, which is conducive to the side frame plate 300 forming a stable limiting support for the fin assembly 200.

[0055] Meanwhile, this embodiment features multiple bolt holes 301 along the edge of the side frame plate 300, facilitating precise positioning and efficient installation of the heat exchanger during on-site construction. This design not only simplifies the connection process with the bracket or equipment housing but also enhances the adaptability of the device under different engineering conditions, reducing installation time and manual adjustment costs.

[0056] The following describes the usage process of the heat exchanger with a heat network plate provided in the embodiments of this application:

[0057] During installation, operators can use the multiple bolt holes 301 located on the edges of the two side frame plates 300 for positioning, and then use bolts to firmly fix the heat exchanger to the foundation support to ensure that the device has good structural stability during operation and reduce the risk of displacement and loosening caused by vibration, thermal expansion and contraction or fluid impact.

[0058] When connecting to an external heating network system, if the inlet pipe 400 and outlet pipe 500 adopt a flange structure or threaded connection design, they can be connected according to the actual pipe interface form, and supplemented with conventional sealing measures such as sealing gaskets, bolt tightening or thread sealant to ensure that the connection part has reliable sealing performance, thereby effectively suppressing fluid leakage and improving system safety.

[0059] Before the heat exchanger is officially started, working fluid needs to be injected into the continuous serpentine flow channel inside the heat exchange copper tube 100 through the liquid inlet pipe 400. This flow channel is formed by welding multiple straight pipe sections 110 with U-shaped connecting bends 120, creating a single, internally continuous flow path. The fluid flows continuously along this serpentine channel, which helps to enhance the heat exchange process with the inner wall of the heat exchange copper tube 100 and improve the heat transfer efficiency per unit volume.

[0060] During the heat transfer process, the outer surface of the heat exchange copper tube 100 is provided with fins 210 arranged at intervals along its axial direction. Each fin 210 is tightly connected to the heat exchange copper tube 100 by an expansion joint through a collar body 212, achieving efficient heat conduction from the heat exchange copper tube 100 to the fins 210. The main body of the fins 210 is made of aluminum alloy, which has excellent thermal conductivity and can quickly diffuse heat from the heat exchange copper tube 100 to its entire surface area.

[0061] Each fin 210 has a turbulence-inducing toothed edge 201 on its outer edge. The heat exchange copper tube 100 has a serrated or wavy structure with equal spacing. When air flows over its surface, it can effectively disrupt the boundary layer, induce vortex flow, and increase the degree of turbulence, thereby enhancing the heat exchange effect on the air side. To further enhance the turbulence intensity, the turbulence-inducing toothed edges 201 of adjacent fins 210 are arranged in an alternating manner, breaking the axial repetition of the fin boundary morphology. This helps to construct more complex flow channels and turbulent airflow trajectories, thereby improving the degree of airflow scouring and thermal convection on the fin surface.

[0062] To ensure the overall stability and arrangement accuracy of the fin assembly 200, two connecting rods 600 are installed at the top and bottom, running parallel through all the fins 210. Both ends are fixedly connected to the side frame plates 300 at both ends via threaded fastening or welding, forming a complete load-bearing skeleton system. This structure provides mechanical support and limiting constraints for the fin assembly 200, maintaining the relative positional relationship between the fins 210 during long-term operation and reducing fin loosening, skewing, or dislocation caused by environmental temperature fluctuations or mechanical vibration.

[0063] After the working fluid completes the heat exchange with the fins, it will be discharged from the outlet pipe 500, completing one heat exchange cycle. The entire heat exchanger unit has a compact structure, reasonable layout, and high heat exchange efficiency, making it suitable for heat transfer needs in various industrial heating network systems. During daily use and maintenance, it is only necessary to periodically check the sealing connection status of the inlet pipe 400 and the outlet pipe 500, and clean the dust or attachments on the surface of the fins 210 to maintain the stability of the equipment operation and its long-term performance.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat exchanger with a heat network plate, characterized in that, It includes a set of heat exchange copper tubes (100), finned assembly (200), two side frame plates (300), two connecting rods (600), liquid inlet pipe (400) and liquid outlet pipe (500); The heat exchange copper tube (100) is welded from multiple straight tube sections (110) and multiple U-shaped connecting bends (120), forming a single heat exchange channel with a continuous serpentine internal structure. The fin assembly (200) consists of multiple uniformly distributed fins (210), with each fin (210) spaced apart along the axial direction of the heat exchange copper tube (100). Each fin (210) includes a fin body (211) and multiple collar bodies (212) disposed on one side of the fin body (211). The heat exchange copper tube (100) passes through the collar bodies (212). The fins (210) are fixedly connected in the through hole by expansion joint. The outer edge of the fins (210) is provided with turbulence tooth edge (201). Two side frame plates (300) are respectively set on both sides of the fin group (200) for axial positioning of the fin group (200). Two connecting rods (600) are connected to each fin (210) of the fin group (200) through one above the other and fixedly connected to the two side frame plates (300) at both ends. The liquid inlet pipe (400) and the liquid outlet pipe (500) are respectively connected to the inlet end and the outlet end of the heat exchange copper tube (100).

2. The heat exchanger with a heat network plate according to claim 1, characterized in that, The heat exchange copper tube (100) is made of deoxidized copper material, and the inner diameter of each straight tube section (110) is 6-10 mm and the wall thickness is 0.5-1.0 mm.

3. The heat exchanger with a heat network plate according to claim 1, characterized in that, The U-shaped connecting bend (120) is connected to the straight pipe section (110) by welding, and each U-shaped connecting bend (120) is located at the structural turning point of the heat exchange copper pipe (100).

4. The heat exchanger with a heat network plate according to claim 1, characterized in that, The fin (210) is made of aluminum alloy with a thickness of 0.1 to 0.3 mm. The collar body (212) and the fin body (211) are integrally stamped structures.

5. The heat exchanger with a heat network plate according to claim 1, characterized in that, The turbulence-cambered edge (201) is a sawtooth or wave-shaped structure that is evenly distributed along the outer edge of the fin (210).

6. The heat exchanger with a heat network plate according to claim 5, characterized in that, The turbulence teeth (201) of two adjacent fins (210) are staggered.

7. The heat exchanger with a heat network plate according to claim 1, characterized in that, The connecting rod (600) is a cylindrical metal rod. The two connecting rods (600) are arranged in parallel vertically, and the two ends of the connecting rod (600) are connected to the two side frame plates (300) by thread fastening or welding.

8. The heat exchanger with a heat network plate according to claim 1, characterized in that, The inlet pipe (400) and outlet pipe (500) are provided with connecting flange structures or threaded connectors.

9. The heat exchanger with a heat network plate according to claim 1, characterized in that, The two side frame plates (300) are made of one-piece molded stainless steel or carbon steel material plates, and have multiple bolt holes (301) on the edges for installation.

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