Processing system and processing technology of heat exchanger and tubular fin heat exchanger

Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a machining system and technology of a heat exchanger and a tubular fin heat exchanger, the machining system comprises a pipe bending work station, a flattening work station, a shaping work station, a folding work station and a pipe penetrating water expansion work station, and the pipe bending work station is used for bending a heat exchange pipe into a heat exchange calandria; the flattening station is used for flattening the lower end part of the heat exchange calandria; the shaping work station is used for shaping the U-bend deformation section of the flattened part of the heat exchange calandria; the folding work station is used for folding the heat exchange calandria into a heat exchange coil pipe with a multi-row structure; the pipe penetrating water expansion work station comprises a pipe penetrating mechanism, a fin arranging mechanism and a water expansion mechanism, the fin arranging mechanism is used for arranging the multiple cooling fins in sequence, the pipe penetrating mechanism is used for inserting the heat exchange coil pipes which are folded to form multiple rows into the multiple cooling fins, and the water expansion mechanism is used for enabling the heat exchange coil pipes to be expanded and deformed so that the heat exchange coil pipes can make close contact with the cooling fins. The method has the effects of eradicating welding leakage, improving the quality of the heat exchanger, guaranteeing the heat exchange performance and improving the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to a heat exchanger processing system, processing technology, and a single-tube finned heat exchanger. Background Technology

[0002] In the field of refrigeration technology, heat exchangers are one of the four core components of refrigeration, and their heat exchange performance directly determines the refrigeration efficiency and operational stability of the refrigeration system. Heat exchange tubes, as one of the core heat transfer components of a heat exchanger, are tubular structures with hollow internal channels for the flow of heat exchange media (cold or hot fluids). To improve the heat exchange efficiency, existing technologies typically involve adding highly thermally conductive metal fins to the surface of the heat exchange tubes, thereby increasing the heat exchange surface area and improving efficiency.

[0003] In the processing and assembly of heat exchangers, the connection between heat exchange tubes and metal fins is often achieved by inserting tubes. The specific process is as follows: after the heat exchange tubes are processed by bending, welding, flattening and other processes, they are assembled into the fins by pushing expansion, so that the heat exchange tubes and metal fins form a tight connection, thereby ensuring the continuity of heat transfer between the heat exchange tubes and fins.

[0004] However, the following technical defects exist in the processing and assembly of heat exchangers: On the one hand, existing technologies (such as the existing Chinese patent CN211425124U which provides a tube-fin heat exchanger) typically employ multiple long U-shaped heat exchange tubes arranged in rows and columns, with adjacent long U-shaped heat exchange tubes welded together by a shorter U-shaped heat exchange tube to form a complete fluid flow channel. This production method involves numerous welding points, and the weld joints are prone to fluid leakage due to weak welding, seriously affecting the operational reliability of the heat exchanger. Furthermore, each pair of adjacent long U-shaped heat exchange tubes requires separate welding, a cumbersome process that not only reduces production efficiency but also increases production costs. On the other hand, the fin insertion process mainly relies on manual operation. In actual production, the finning workers hold multiple fins in their hands and pass the heat exchange tubes through the fins one by one. This manual operation makes it difficult to guarantee the quality of fin insertion, and problems such as missing fins, misplacement, and incorrect fin orientation are prone to occur. This leads to poor subsequent insertion of aluminum heat exchange tubes and seriously affects production efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems of easy leakage of fluid medium due to weak welding at the weld joint of heat exchange tube in the prior art, difficulty in ensuring the quality of manual fin arrangement, and low production efficiency, the present invention provides a heat exchanger processing system, processing technology and a one-tube finned heat exchanger, which will at least take a step forward in overcoming one or more of the above problems, or at least provide the public with a useful option.

[0006] The technical solution adopted by this invention to solve its technical problem is: a heat exchanger processing system, comprising: A tube bending station, which is used to bend a heat exchange tube into a snake-shaped heat exchange tube array. A flattening station, used to flatten the lower end of the heat exchanger tubes; A shaping station is used to shape the U-shaped bends deformed at the flattened part of the heat exchanger tubes; The folding station is used to fold the shaped heat exchanger tubes into a multi-row heat exchanger coil. The tube-insertion and water-expansion station includes a tube-insertion mechanism, a fin arrangement mechanism, and a water-expansion mechanism. The fin arrangement mechanism is used to arrange multiple heat exchange fins sequentially. The tube-insertion mechanism is used to insert heat exchange coils, which are folded in half to form multiple rows, into multiple heat exchange fins. The water-expansion mechanism is used to expand and deform the heat exchange coils so that they can make close contact with the heat exchange fins.

[0007] Furthermore, the flattening station includes: a flattening frame, a fixed mold, a pressing mold, and a pressing drive mechanism. The pressing drive mechanism is disposed on the flattening frame, the pressing mold is disposed on the moving end of the pressing drive mechanism, the fixed mold is located above the pressing mold, and a flattening cavity is formed between the pressing mold and the fixed mold for the lower end of the heat exchange tube to be inserted. The moving end of the pressing drive mechanism drives the pressing mold to approach the fixed mold to flatten the lower end of the heat exchange tube.

[0008] Furthermore, the shaping station includes: a shaping frame, and a tail blocking mechanism, a middle clamping mechanism, a shaping mechanism, and a shaping drive mechanism sequentially arranged on the shaping frame. The tail blocking mechanism has a blocking cavity for inserting the upper end of the heat exchange tube, and the blocking cavity is used to restrict the movement of the heat exchange tube along the x-axis. The middle clamping mechanism is used to clamp the middle part of the heat exchange tube. The shaping drive mechanism is used to drive the shaping mechanism to move along the x-axis. The shaping mechanism has a shaping cavity for inserting the lower end of the flattened heat exchange tube, and the shaping cavity has a square shaping slot to accommodate the flattened part of the heat exchange tube.

[0009] Furthermore, the folding station includes: a folding frame, and a first folding module and a second folding module disposed on the folding frame. The first folding module is used to fix the upper end of the heat exchange tube and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube, which is partially fixed, forms a first folding direction. The second folding module is used to fix the upper end of the heat exchange tube and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube, which is partially fixed, forms a second folding direction. The first folding direction is opposite to the second folding direction.

[0010] Furthermore, the fin arrangement mechanism includes: two fin arrangement side plates arranged opposite each other, a fin arrangement channel is formed between the two fin arrangement side plates, fin arrangement baffles are respectively provided at both ends of the fin arrangement channel, and a plurality of heat dissipation fins are arranged sequentially between the two fin arrangement baffles.

[0011] Furthermore, the tube-insertion mechanism includes: a tube-insertion slide mechanism, a rotating mechanism, a tube-insertion platform, a support plate assembly, a tube-pushing assembly, and a tube-insertion drive mechanism. The tube-insertion slide mechanism is located on one side of the fin arrangement mechanism. The rotating mechanism is disposed on the tube-insertion slide mechanism and is used to drive the rotating mechanism to move closer to or away from the fin arrangement mechanism along the x-axis. The tube-insertion platform is disposed on the rotating mechanism and is used to drive the tube-insertion platform to rotate around the z-axis. The tube-insertion drive mechanism, the tube-pushing assembly, and the support plate assembly are sequentially disposed on the tube-insertion platform along the x-axis. Multiple rows of heat exchange coils, folded in half, are inserted into the support plate assembly, with the lower end of the heat exchange coils facing the fin arrangement mechanism and the upper end of the heat exchange coils abutting against the tube-pushing assembly. The tube-insertion drive mechanism drives the tube-pushing assembly to move along the x-axis, thereby pushing the lower end of the heat exchange coils to sequentially pass through multiple heat dissipation fins.

[0012] Furthermore, the water expansion mechanism includes: Water tank; A water inlet pipe, one end of which is connected to the water tank and the other end of which is connected to the heat exchange coil, and a water vortex pump, a two-way ball valve one, a booster cylinder, a two-way ball valve two and a three-way ball valve are sequentially arranged on the water inlet pipe from the water tank to the heat exchange coil. The three-way ball valve is connected to an external air supply device. The return water pipe has one end connected to the water tank and the other end connected to the heat exchange coil. A two-way ball valve is installed on the return water pipe.

[0013] A tube-type finned heat exchanger manufactured using a heat exchanger processing system described in any one of the above claims includes: a fin group and a heat exchange coil. The fin group consists of several heat dissipation fins arranged parallel to each other and spaced at a certain distance. The heat exchange coil consists of a multi-layer structure composed of a heat exchange tube bent into multiple continuous U-shaped segments. The heat exchange coil passes through each of the heat dissipation fins of the fin group and is tightly fitted to the heat dissipation fins. The multi-layer structure includes at least one upper horizontal pipe layer and at least one lower horizontal pipe layer. The upper and lower horizontal pipe layers are alternately spaced along the z-axis. The corresponding ends of adjacent upper and lower horizontal pipe layers are integrally connected by a first inclined U-bend with a first folding direction. The corresponding ends of the lower horizontal pipe layer and the adjacent next upper horizontal pipe layer are integrally connected by a second inclined U-bend with a second folding direction. The first folding direction and the second folding direction are opposite. Each upper and lower horizontal pipe layer includes a first U-bend, a second U-bend, and a straight pipe section. The two ends of the straight pipe section are integrally connected to the first U-bend and the second U-bend, respectively. All first U-bends on the same side are arranged in parallel, and all second U-bends on the same side are arranged in parallel. One end of the heat exchange tube forms the fluid inlet end of the heat exchange coil, and the other end of the heat exchange tube forms the fluid outlet end of the heat exchange coil.

[0014] Furthermore, each of the first U-bend segments has a flattened surface formed on both sides, and each of the heat dissipation fins has multiple fin holes. Each fin hole includes a square slot for the first U-bend segment to pass through and an arc-shaped slot for the straight pipe segment to pass through. The height of the square slot matches the distance between the flattened surfaces formed on both sides of the first U-bend segment, and the diameter of the arc-shaped slot matches the outer diameter of the straight pipe segment. Each arc-shaped slot has an outwardly protruding limiting flange at its edge, and the limiting flange abuts against the adjacent heat dissipation fin.

[0015] A processing method for a heat exchanger, employing a processing system for a heat exchanger as described in any of the above claims, wherein the processing method includes the following steps: Step S1, pipe bending process: A heat exchange tube without welds is bent into a heat exchange tube array through the pipe bending station. The bent heat exchange tube array consists of multiple continuous U-shaped sections arranged in a serpentine structure. Step S2, Flattening process: Insert the lower ends of the heat exchange tubes that have been bent and laid flat in step S1 into the flattening cavity in sequence. The moving end of the pressing drive mechanism drives the pressing mold to approach the fixed mold to flatten the lower ends of the heat exchange tubes. Step S3, Shaping process: The heat exchange tubes flattened in step S2 are placed on the shaping station. The upper end of the heat exchange tubes is inserted into the blocking cavity, the middle clamping mechanism clamps the middle of the heat exchange tubes, and the shaping drive mechanism drives the shaping mechanism to move along the x-axis, so that the lower end of the flattened heat exchange tubes is inserted into the shaping cavity to shape the deformed U-shaped bend at the flattened part. Step S4, Folding Process: The heat exchanger tubes after being shaped in Step S3 are placed on the first folding module. The first folding module is used to fix the upper end of the heat exchanger tube and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchanger tube, which is fixed in part, forms a first folding direction. Then, the heat exchanger tubes after being folded by the first folding module are placed on the second folding module. The second folding module is used to fix the upper end of the heat exchanger tube and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchanger tube, which is fixed in part, forms a second folding direction. The flat heat exchanger tubes are folded into multiple rows of heat exchanger coils through the first folding module and the second folding module. Step S5, fin arrangement process: Place a fin arrangement baffle at one end of the fin arrangement channel, arrange multiple heat dissipation fins sequentially from one end of the fin arrangement channel to the other end, and then place another fin arrangement baffle at the other end of the fin arrangement channel to complete the fin arrangement operation. Step S6, Tube insertion preparation process: The rotating mechanism drives the tube insertion platform to rotate around the z-axis at a certain angle, so that the support plate assembly faces the outside of the tube insertion mechanism. The heat exchange coils, which are folded into multiple rows, are inserted into the support plate assembly. The upper end of the heat exchange coils abuts against the push tube assembly. The rotating mechanism drives the tube insertion platform to rotate around the z-axis to reset, so that the lower end of the heat exchange coils faces the plate arrangement channel. The tube insertion slide mechanism drives the rotating mechanism to approach the plate arrangement channel along the x-axis. Step S7, Pipe threading process: The tube pusher assembly moves and pushes the lower end of the heat exchange coil through multiple heat dissipation fins in sequence; Step S8, Tube insertion and resetting process: The tube insertion drive mechanism drives the tube pusher assembly away from the heat exchange coil along the x-axis until it separates from the upper end of the heat exchange coil; Step S9, tube expansion process: Connect one end of the inlet pipe to the fluid inlet end of the heat exchange coil, and connect the other end of the return pipe to the fluid outlet end of the heat exchange coil. Open the liquid passages of two-way ball valve 1, two-way ball valve 2, and three-way ball valve. Open two-way ball valve 3. Use a water vortex pump to deliver fluid into the inlet pipe until the inlet pipe and heat exchange coil are filled with fluid. After the inlet pipe and heat exchange coil are filled with fluid, close two-way ball valve 1 and two-way ball valve 3 to prevent the fluid in the inlet pipe from flowing back to the water tank and to seal the pressurization pipeline. Then, pressurize the fluid in the inlet pipe and heat exchange coil through the pressurization cylinder to make the heat exchange coil expand and deform, and then make close contact with the heat dissipation fins, and maintain the pressure for 1 to 2 seconds. Step S10, Drainage process: After the tube expansion is completed, the liquid passages of the two-way ball valve and the three-way ball valve are closed, the two-way ball valve is opened, the gas passage of the three-way ball valve is opened, the external air supply device supplies air into the water inlet pipe, and the gas pushes the residual liquid in the water inlet pipe and heat exchange coil through the return water pipe back to the water tank. Step S11: Disconnect the inlet pipe from the fluid inlet end and the return pipe from the fluid outlet end, and remove the expanded tube finned heat exchanger from the finned channel.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, the bending station directly bends a complete heat exchange tube into a snake-shaped heat exchange tube, eliminating a large number of welding points from the source, solving the problem of fluid medium leakage caused by weak welding points, and saving multiple welding processes, shortening the production process and reducing production costs. (2) In this invention, the flattening station, the shaping station, and the folding station successively flatten the ends of the serpentine heat exchange tube, shape the plane, and fold it in multiple layers to form a multi-row structure that is compatible with the fin group. The processes of each station are closely connected, providing qualified semi-finished products for subsequent automated tube insertion and tube expansion, and ensuring the smoothness of the overall processing technology. (3) The fin arrangement mechanism integrated in the pipe-threading and water-expansion station of the present invention can complete the orderly arrangement of multiple heat dissipation fins and ensure the stability of the fin arrangement quality; the pipe threading mechanism automatically inserts the folded heat exchange coil into the fin group, avoiding the problem of unsmooth pipe threading caused by manual pipe threading and improving pipe threading efficiency; the water expansion mechanism achieves the tight fit between the heat exchange coil and the heat dissipation fins by medium filling and internal pressurization. In the entire expansion process, the expansion is achieved only by the action of the medium and the inner wall of the coil, and no rigid parts (such as traditional push rods and expansion cores) penetrate the fin group or come into contact with the fins; (4) In this invention, the single-tube finned heat exchanger is formed by bending a complete heat exchange tube into a multi-layer structure with multiple continuous U-shaped sections. There are no splicing pipes or fittings. The entire process is integrally formed, which avoids the leakage risk caused by the welding process and improves the sealing performance. The first U-bend section is flattened to ensure that the multi-layer structure can directly pass through the fin holes of the heat exchange fins. The heat exchange coil and the fin holes are interference fit to ensure that the heat exchange fins and the heat exchange coil are firmly connected after the tube is inserted. (5) By setting a first inclined U-bend in the first folding direction and a second inclined U-bend in the second folding direction, the present invention provides two turning paths for the heat exchange coil to bend into a multi-layer structure, which satisfies the folding requirements of the heat exchange coil in multiple alternating reverse directions, thereby ensuring that a heat exchange tube can be bent into a multi-layer structure and avoiding the welding requirements that may be brought about by the multi-layer structure. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a process flow diagram of the processing technology of a heat exchanger according to the present invention; Figure 2 This is a schematic diagram of the flattening station of the present invention; Figure 3 for Figure 2 A partial sectional view; Figure 4 This is an assembly diagram of the fixed mold, clamping mold, and clamping drive mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the shaping station of the present invention; Figure 6 for Figure 5 Partial structural diagram; Figure 7 This is a schematic diagram of the tail blocking mechanism of the present invention; Figure 8 This is a schematic diagram of the central clamping mechanism of the present invention; Figure 9 This is a schematic diagram of the shaping mechanism and shaping drive mechanism of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of a local structure at point A; Figure 11 This is a schematic diagram of the folding station of the present invention; Figure 12 This is a schematic diagram showing the installation of the heat exchanger coils before folding, the first folding module, and the second folding module; Figure 13 for Figure 12 Enlarged schematic diagram of the local structure at point B; Figure 14 for Figure 12 Enlarged schematic diagram of the local structure at point C; Figure 15 This is a schematic diagram showing the installation of the folded heat exchange coil with the first and second folded modules. Figure 16 for Figure 15 Enlarged schematic diagram of the local structure at point D; Figure 17 for Figure 15 Enlarged schematic diagram of the local structure at point E; Figure 18 for Figure 15 Top view; Figure 19 This is a schematic diagram of the first folding drive mechanism; Figure 20 This is a schematic diagram of the structure of the first left jacket and the first right jacket; Figure 21This is a schematic diagram of the second folding drive mechanism; Figure 22 This is a schematic diagram of the structure of the second left jacket and the second right jacket; Figure 23 This is a schematic diagram of the first clamping mechanism and the second clamping mechanism; Figure 24 This is a schematic diagram of the structure of the pipe-penetrating hydraulic expansion station of the present invention; Figure 25 This is a partial structural schematic diagram of the tray arrangement mechanism of the present invention; Figure 26 This is a schematic diagram of the structure of the tablet press base of the present invention; Figure 27 This is a schematic diagram of the structure of the pipe-insertion hydro-expansion frame of the present invention; Figure 28 for Figure 27 Enlarged schematic diagram of the local structure at point F; Figure 29 for Figure 27 Enlarged schematic diagram of the local structure at point G; Figure 30 This is a schematic diagram of the tube-insertion mechanism of the present invention; Figure 31 This is a schematic diagram of the tube-insertion mechanism from another perspective of the present invention; Figure 32 This is a schematic diagram of the pipe-passing platform of the present invention; Figure 33 for Figure 32 Enlarged schematic diagram of the local structure at point H; Figure 34 This is a schematic diagram of the rotating mechanism of the present invention; Figure 35 This is a schematic diagram of the positioning and fixing mechanism of the present invention; Figure 36 This is a schematic diagram of the structure of the water expansion mechanism of the present invention; Figure 37 This is a schematic diagram of part of the internal structure of the water expansion mechanism of the present invention; Figure 38 This is a schematic diagram of the pipeline adjustment mechanism of the present invention.

[0019] In the picture: 000, Heat exchanger; 001, Heat exchange tube; 002, Heat exchange tube bundle; 003, Heat exchange coil; 0031, Upper horizontal tube bundle layer; 0032, Lower horizontal tube bundle layer; 0033, First inclined U-bend; 0034, Second inclined U-bend; 0035, First U-bend section; 0036, Second U-bend section; 0037, Straight tube section; 004, Heat dissipation fins; 0041, Square slot; 0042, Arc-shaped slot; 0043, Limiting flange; 1. Flattening station; 101. Flattening frame; 102. Fixed mold; 103. Pressing mold; 104. Pressing drive mechanism; 105. Flattening cavity; 106. Flattening worktable; 107. Buffer cavity; 2. Shaping station; 201. Shaping frame; 202. Tail blocking mechanism; 2021. Blocking cavity; 2022. Blocking base; 2023. Lower blocking support plate; 2024. Upper blocking pressure plate; 2025. Blocking power component; 203. Middle clamping mechanism; 2031. Clamping base; 2032. Lower clamping support plate; 2033. Upper clamping pressure plate; 2034. Clamping power component; 2035. Upper clamping groove; 20 36. Lower clamping groove; 2037. Third shaping slider; 204. Shaping mechanism; 2041. Shaping cavity; 20411. Square shaping slot; 20412. Arc-shaped shaping slot; 2042. Shaping plane; 2043. First shaping slider; 2044. Shaping base plate; 2045. Shaping plate; 2046. Shaping baffle; 205. Shaping drive mechanism; 2051. Second shaping slider; 206. Shaping slide rail; 3. Folding station; 301. Folding frame; 302. First clamping mechanism; 3021. First guide rail bracket; 3022. First lifting seat; 3023. First lifting cylinder; 3024. First pad; 3025. First pressure plate; 3026. First clamping cylinder; 303. First folding drive mechanism; 3031. First folding cylinder; 3032. First rack; 3033. First left gear; 3034. First right gear; 304. First left clamping sleeve; 305. First right clamping sleeve; 3051. First clamping sleeve body; 3052. First rotating shaft; 306. First clamping sleeve hole; 3061. First upper hole section; 3062. First lower hole section; 307. Second clamping mechanism; 3071. Second guide rail bracket; 3072. Second lifting seat; 3073. Second lifting cylinder; 3074. Second pad; 3075. Second pressure plate; 3076. Second clamping cylinder; 308. Second folding drive mechanism; 3081. Second folding cylinder; 3082. Second rack; 3083. Second left gear; 3084. Second right gear; 309. Second left sleeve; 310. Second right sleeve; 3101. Second sleeve body; 3102. Second rotating shaft; 311. Second sleeve hole; 3111. Second upper hole section; 3112. Second lower hole section; 312. First height adjustment mechanism; 3121. First 3122. Adjusting turntable; 3123. First adjusting shaft; 3124. First driving bevel gear; 3125. First adjusting screw; 3126. First nut seat; 313. Second height adjusting mechanism; 3131. Second adjusting turntable; 3132. Second adjusting shaft; 3133. Second driving bevel gear; 3134. Second driven bevel gear; 3135. Second adjusting screw; 3136. Second nut seat; 4. Pipe-through hydraulic expansion station; 401. Pipe-through mechanism; 4011. Pipe-through sliding table mechanism; 40111. Slide table drive component; 40112. Slide table guide rail; 40113. Slide table slider; 4012. Rotation mechanism; 40121. Rotation base; 40122. Rotation platform; 40123. Rotation bearing; 40124. Rotation drive component; 40125. First limiting component; 40126. Second limiting component; 40127. Third limiting component; 40128. Fourth limiting component; 4013. Pipe-through platform; 40131. Fixing block; 40132. Fixing hole ; 40133, Limit pin; 4014, Handrail assembly; 40141, Front handrail; 40142, Rear handrail; 40143, First guide hole; 40144, Second guide hole; 40145, Anti-collision post; 40146, Reset cable chain; 4015, Push tube assembly; 40151, Push rod; 40152, Connecting plate; 40153, Push tube groove; 40154, Connecting hole; 40155, Retaining plate; 40156, Mounting plate; 4016, Pipe threading drive mechanism; 40161, First mounting base; 40162, Pipe threading servo motor; 40 163. Drive wheel; 40164. Transmission belt; 40165. Driven wheel; 40166. Through-pipe screw; 402. Tablet stacking mechanism; 4021. Tablet stacking base; 4022. Tablet pressing base; 4023. Tablet stacking station; 40231. Tablet stacking lifting cylinder; 40232. Tablet stacking lifting base plate; 40233. Tablet stacking side plate; 40234. Tablet pressing cylinder; 40235. Tablet pressing plate; 40236. Tablet stacking baffle; 40237. Tablet stacking slot; 40238. Tablet stacking intermediate plate; 403. Water expansion mechanism; 4031. Water tank; 4032. Water inlet pipe ; 4033, Water vortex pump; 4034, Two-way ball valve one; 4035, Booster cylinder; 4036, Two-way ball valve two; 4037, Three-way ball valve; 4038, Digital pressure gauge; 4039, Return water pipe; 40310, Two-way ball valve three; 404, Pipe-through hydro-expansion frame; 4041, Limit seat; 4042, Limit hole; 405, Position fixing mechanism; 4051, Position lifting cylinder; 4052, Fixing component; 406, Pipeline adjustment mechanism; 4061, Y-axis adjustment slide; 4062, Slide plate; 4063, Adjustment drive component; 4064, Hanging plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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 the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figures 2 to 38 The diagram shows a preferred embodiment of the present invention, specifically a heat exchanger processing system comprising: The tube bending station is used to bend a heat exchange tube 001 into a snake-shaped heat exchange tube array 002. Flattening station 1 is used to flatten the lower end of heat exchanger tube 002; Shaping station 2 is used to shape the U-shaped bend at the flattened part of heat exchanger tube 002; Folding station 3 is used to fold the shaped heat exchanger tubes 002 into heat exchanger coils 003 with multiple rows. The pipe-insertion hydraulic expansion station 4 includes a pipe-insertion mechanism 401, a fin arrangement mechanism 402, and a hydraulic expansion mechanism 403. The fin arrangement mechanism 402 is used to arrange multiple heat exchange coils 004 in sequence. The pipe-insertion mechanism 401 is used to insert heat exchange coils 003, which are folded in half to form multiple rows, into the multiple heat exchange fins 004. The hydraulic expansion mechanism 403 is used to expand and deform the heat exchange coils 003 so that they can come into close contact with the heat exchange fins 004.

[0024] In a preferred embodiment, the tube bending station can use a tube bending device of the prior art to bend a heat exchange tube 001 into a snake-shaped heat exchange tube array 002.

[0025] In a preferred embodiment, see Figures 2-4 As shown, the flattening station 1 includes: a flattening frame 101, a fixed mold 102, a pressing mold 103, and a pressing drive mechanism 104. The pressing drive mechanism 104 is mounted on the flattening frame 101, the pressing mold 103 is mounted on the moving end of the pressing drive mechanism 104, the fixed mold 102 is located above the pressing mold 103, and a flattening cavity 105 is formed between the pressing mold 103 and the fixed mold 102 for the lower end of the heat exchange tube 002 to be inserted. The moving end of the pressing drive mechanism 104 drives the pressing mold 103 to approach the fixed mold 102 to flatten the lower end of the heat exchange tube 002.

[0026] Specifically, the clamping drive mechanism 104 uses components that can achieve linear drive, such as linear motors, hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0027] Specifically, a flattening worktable 106 is inclinedly arranged on the flattening frame 101. The fixed mold 102, the pressing mold 103 and the pressing drive mechanism 104 are located at the lower end of the flattening worktable 106. This allows the heat exchange tubes 002 to be laid flat and supported, preventing the remaining parts from deforming due to lack of support when one lower end is flattened. At the same time, the inclined table surface allows the area to be flattened to automatically slide into the flattening cavity 105 without the need for an additional positioning mechanism, simplifying the structure and operation.

[0028] Specifically, buffer cavities 107 are provided on both sides of the flattening cavity 105. The buffer cavities 107 are located outside the pressing mold 103. The buffer cavities 107 provided on both sides of the flattening cavity 105 can buffer the pipe ends on the adjacent sides of the lower end to be flattened.

[0029] It should be noted here that: only one lower end is flattened at a time, which effectively avoids the deformation of the heat exchange coil 002 caused by flattening multiple ends at once. This can ensure the flattening accuracy of a single end and the parallelism of each flattened surface, and also eliminate the insertion resistance of the heat exchange coil 003 and heat dissipation fins 004 in the subsequent tube insertion process, prevent the fins from being pushed out of shape, and ensure the smoothness of tube insertion and the integrity of the fin assembly.

[0030] In a preferred embodiment, see Figures 5-10As shown, the shaping station 2 includes: a shaping frame 201, and a tail blocking mechanism 202, a middle clamping mechanism 203, a shaping mechanism 204, and a shaping drive mechanism 205 sequentially arranged on the shaping frame 201. The tail blocking mechanism 202 has a blocking cavity 2021 for inserting the upper end of the heat exchange tube 002. The blocking cavity 2021 is used to stop the upper end of the heat exchange tube 002 to restrict the movement of the heat exchange tube 002 along the x-axis. The middle clamping mechanism 203 is used to clamp the middle part of the heat exchange tube 002. The shaping drive mechanism 205 is used to drive the shaping mechanism 204 to move along the x-axis. The shaping mechanism 204 has a shaping cavity 2041 for inserting the lower end of the flattened heat exchange tube 002. The shaping cavity 2041 has a shaping plane 2042 that matches the flattened plane of the heat exchange tube 002.

[0031] Specifically, there are multiple shaping cavities 2041. Each shaping cavity 2041 is used to insert the flattened lower end of a heat exchange tube 002, so as to realize the synchronous shaping of all the lower ends of the heat exchange tube 002. The multiple shaping cavities 2041 are arranged along the same straight line and are coplanar. Through the coplanar reference of the shaping cavities 2041, it is ensured that the upper and lower flattened surfaces of all the lower ends of the heat exchange tube 002 tend to be on the same plane after shaping, so as to ensure the smoothness of subsequent tube insertion.

[0032] For more details, see Figure 10 As shown, each shaping cavity 2041 includes a square shaping slot 20411 and two arc-shaped shaping slots 20412. The two arc-shaped shaping slots 20412 are connected to the two ends of the square shaping slot 20411. The height of the square shaping slot 20411 is less than the height of the arc-shaped shaping slots 20412. The square shaping slot 20411 has two shaping planes 2042 arranged opposite to each other. The two shaping planes 2042 form a square shaping slot 20411 to accommodate the flattened part of the heat exchange tube 002. The arc-shaped shaping slots 20412 are used for the straight pipe section 0037 of the heat exchange tube 002 to pass through.

[0033] In this embodiment, the shaping frame 201 is provided with a shaping slide rail 206, which is arranged along the x-axis direction. The shaping mechanism 204 is provided with a first shaping slider 2043, which is slidably connected to the shaping slide rail 206.

[0034] Specifically, the shaping mechanism 204 includes a shaping base plate 2044, a shaping plate 2045, and a shaping baffle 2046. The shaping base plate 2044 is disposed on the first shaping slider 2043, the shaping plate 2045 is disposed on the shaping base plate 2044, and multiple shaping cavities 2041 are arranged along the same straight line on the shaping plate 2045, that is, multiple shaping cavities 2041 are arranged sequentially on the shaping plate 2045 along the y-axis direction. The shaping baffle 2046... 46 is set on the shaping base plate 2044 and abuts against the end of the shaping plate 2045 away from the tail blocking mechanism 202, so as to prevent the shaping plate 2045 from being moved by the reaction force during the process of inserting the heat exchange tube 002 into the shaping cavity 2041, thereby improving the shaping accuracy. The shaping baffle 2046 is connected to the moving end of the shaping drive mechanism 205, and the shaping mechanism 204 is driven to move closer to or away from the tail blocking mechanism 202 through the shaping drive mechanism 205.

[0035] In this embodiment, the shaping drive mechanism 205 uses components that can achieve linear drive, such as linear motors, hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0036] It should be noted that the shaping drive mechanism 205 is equipped with a second shaping slider 2051, which is slidably connected to the shaping slide rail 206. The installation position of the shaping drive mechanism 205 can be adjusted according to the length of the heat exchange tube 002 to be shaped, thereby improving the versatility of the equipment.

[0037] Specifically, based on the width of the heat exchanger tube 002, the number of shaping drive mechanisms 205 can be set to multiple. Multiple shaping drive mechanisms 205 are arranged along the y-axis direction, and can synchronously drive different positions of the shaping mechanism 204, further improving the overall movement accuracy of the shaping mechanism 204.

[0038] In this embodiment, the tail blocking mechanism 202 includes a blocking base 2022, a lower blocking support plate 2023, an upper blocking pressure plate 2024, and a blocking power component 2025. The blocking base 2022 is mounted on the forming frame 201, and the lower blocking support plate 2023 is mounted on the blocking base 2022. The lower blocking support plate 2023 is provided with a plurality of blocking cavities 2021 for accommodating the lower ends of the heat exchange tubes 002. The lower end of each heat exchange tube 002 is provided with a blocking cavity 2021. Within the baffle 2021, each baffle 2021 has a U-shaped inner wall surface adapted to the lower end of the heat exchange tube 002. Multiple baffle cavities 2021 are arranged along the y-axis. The upper baffle plate 2024 is located above the lower baffle support plate 2023 and connected to the moving end of the baffle power component 2025. The baffle power component 2025 is mounted on the baffle base 2022 and is used to drive the upper baffle plate 2024 to move closer to or further away from the lower baffle support plate 2023 along the z-axis. Thus, the baffle cavities 2021 form a restraining constraint on the lower end of the heat exchange tube 002, preventing the heat exchange tube 002 from moving along the x-axis during the shaping process. The lower baffle support plate 2023 and the upper baffle plate 2024 cooperate to prevent the heat exchange tube 002 from shifting along the z-axis.

[0039] Specifically, the blocking power component 2025 uses components that can achieve linear drive, such as linear motors, hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0040] In this embodiment, the central clamping mechanism 203 includes a clamping base 2031, a lower clamping support plate 2032, an upper clamping pressure plate 2033, and a clamping power component 2034. The clamping base 2031 is mounted on the forming frame 201, and the lower clamping support plate 2032 is mounted on the clamping base 2031. The lower clamping support plate 2032 has multiple lower clamping grooves 2036 for the straight pipe sections 0037 of the heat exchanger pipe 002 to pass through. The multiple lower clamping grooves 2036 are arranged along the y-axis direction. The upper clamping pressure plate 2033 is located above the lower clamping support plate 2032 and is clamped to the lower clamping support plate 2032. The moving end of the power component 2034 is connected to the clamping power component 2034, which is set on the clamping base 2031 and is used to drive the upper clamping pressure plate 2033 to move closer to or away from the lower clamping support plate 2032 along the z-axis. The upper clamping pressure plate 2033 has multiple upper clamping grooves 2035, and the upper clamping grooves 2035 and lower clamping grooves 2036 are arranged in a one-to-one correspondence. The upper clamping grooves 2035 and lower clamping grooves 2036 are used to clamp the straight pipe section 0037 in the middle of the heat exchanger tube 002, which can prevent the straight pipe section 0037 from bending under the force during the shaping process, and further ensure the shaping quality.

[0041] Specifically, the clamping power component 2034 uses a component that can achieve linear drive, such as a linear motor, hydraulic cylinder, pneumatic cylinder or electric push rod.

[0042] Specifically, both the lower clamping groove 2036 and the upper clamping groove 2035 have arc-shaped groove surfaces that match the outer diameter of the straight pipe section 0037. The upper clamping groove 2035 and the lower clamping groove 2036 work together to clamp the straight pipe section 0037, preventing the heat exchange pipe 002 from bending in the z-axis direction.

[0043] Specifically, a third shaping slider 2037 is provided on the clamping base 2031. The third shaping slider 2037 is slidably connected to the shaping slide rail 206, thereby adjusting the clamping position of the central clamping mechanism 203.

[0044] In a preferred embodiment, see Figures 11-23 As shown, the folding station 3 includes: a folding frame 301, and a first folding module and a second folding module disposed on the folding frame 301. The first folding module is used to fix the upper end of the heat exchange tube 002 and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube 002, which is fixed in part, forms a first folding direction. The second folding module is used to fix the upper end of the heat exchange tube 002 and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube 002, which is fixed in part, forms a second folding direction. The first folding direction is opposite to the second folding direction.

[0045] In this embodiment, the first folding module includes a first clamping mechanism 302, a first folding drive mechanism 303, and a first left clamping sleeve 304 and a first right clamping sleeve 305 rotatably connected to the folding frame 301. The first left clamping sleeve 304 and the first right clamping sleeve 305 are respectively provided with first clamping sleeve holes 306 for inserting the lower end of the heat exchange tube 002. The first clamping mechanism 302 is used to clamp and fix the upper end of the heat exchange tube 002. The first folding drive mechanism 303 is connected to the first left clamping sleeve 304 and the first right clamping sleeve 305 respectively, and is used to drive the first left clamping sleeve 304 and the first right clamping sleeve 305 to rotate in opposite directions so that the upper end clamped by the first clamping mechanism 302 forms a first folding direction. The second folding module includes a second clamping mechanism 307, a second folding drive mechanism 308, and a second left clamping sleeve 309 and a second right clamping sleeve 310 rotatably connected to the folding frame 301. The second left clamping sleeve 309 and the second right clamping sleeve 310 are respectively provided with second clamping sleeve holes 311 for the lower end of the heat exchange tube 002 to be inserted. The second clamping mechanism 307 is used to clamp and fix the upper end of the heat exchange tube 002. The second folding drive mechanism 308 is connected to the second left clamping sleeve 309 and the second right clamping sleeve 310 respectively, and is used to drive the second left clamping sleeve 309 and the second right clamping sleeve 310 to rotate in opposite directions so that the upper end clamped by the second clamping mechanism 307 forms a second folding direction.

[0046] In other words, such as Figures 12-18As shown, the heat exchange coil 002 is folded in half by the folding station 3 to form a heat exchange coil 003 with a multi-row structure. The multi-row heat exchange coil 003 has multiple upper ends arranged along the first folding direction and multiple upper ends arranged along the second folding direction, and the upper ends arranged along the first folding direction and the upper ends arranged along the second folding direction are alternately arranged.

[0047] Specifically, such as Figures 19-20 As shown, the first folding drive mechanism 303 includes a first folding cylinder 3031, a first rack 3032, a first left gear 3033, and a first right gear 3034. The first left gear 3033 is connected to the first left clamping sleeve 304, and the first right gear 3034 is connected to the first right clamping sleeve 305. The first left gear 3033 and the first right gear 3034 mesh with each other. The first folding cylinder 3031 is mounted on the folding frame 301 and is used to drive the first rack 3032 to move, thereby causing the first right gear 3034 and the first left gear 3033 to rotate in opposite directions, thereby causing the first left clamping sleeve 304 and the first right clamping sleeve 305 to rotate in opposite directions so that the upper end clamped by the first clamping mechanism 302 forms a first folding direction.

[0048] More specifically, the first left sleeve 304 and the first right sleeve 305 each include a first sleeve body 3051 and a first rotating shaft 3052. The first sleeve hole 306 is provided in the first sleeve body 3051. The first sleeve body 3051 is connected to the first rotating shaft 3052. The first rotating shaft 3052 is rotatably connected to the folding frame 301. The first left gear 3033 and the first right gear 3034 are respectively fitted on the corresponding first rotating shafts 3052.

[0049] It should be noted that the first jacket hole 306 includes a first upper hole section 3061 and a first lower hole section 3062 that are interconnected. The first upper hole section 3061 is a rectangular hole or an oblong hole. In this embodiment, the first upper hole section 3061 is an oblong hole. The cross-sectional shape of the first lower hole section 3062 is rectangular, and the width of the first lower hole section 3062 is smaller than the width of the first upper hole section 3061. In order for the first jacket hole 306 to better limit the lower end of the heat exchange tube 002 after it is flattened during the folding process, the cross-sectional shape of the first lower hole section 3062 needs to be designed to be rectangular and the width of the first lower hole section 3062 needs to be smaller than the width of the first upper hole section 3061 to fit the flattened planar area.

[0050] Specifically, such as Figures 21-22As shown, the second folding drive mechanism 308 includes a second folding cylinder 3081, a second rack 3082, a second left gear 3083, and a second right gear 3084. The second left gear 3083 is connected to the second left clamping sleeve 309, and the second right gear 3084 is connected to the second right clamping sleeve 310. The second left gear 3083 and the second right gear 3084 mesh with each other. The second folding cylinder 3081 is mounted on the folding frame 301 and is used to drive the second rack 3082 to move, thereby causing the second left gear 3083 and the second right gear 3084 to rotate in opposite directions, thereby causing the second left clamping sleeve 309 and the second right clamping sleeve 310 to rotate in opposite directions so that the upper end clamped by the second clamping mechanism 307 forms a second folding direction.

[0051] More specifically, the second left sleeve 309 and the second right sleeve 310 each include a second sleeve body 3101 and a second rotating shaft 3102. The second sleeve hole 311 is provided in the second sleeve body 3101. The second sleeve body 3101 is connected to the second rotating shaft 3102. The second rotating shaft 3102 is rotatably connected to the folding frame 301. The second left gear 3083 and the second right gear 3084 are respectively fitted on the corresponding second rotating shafts 3102.

[0052] It should be noted that the second jacket hole 311 includes a second upper hole section 3111 and a second lower hole section 3112 that are interconnected. The second upper hole section 3111 is a rectangular hole or an oblong hole. In this embodiment, the second upper hole section 3111 is an oblong hole. The cross-sectional shape of the second lower hole section 3112 is rectangular. The width of the second hole section is smaller than the width of the second upper hole section 3111. In order for the second jacket hole 311 to better limit the lower end of the heat exchange tube 002 after it is flattened during the folding process, the cross-sectional shape of the second lower hole section 3112 needs to be designed to be rectangular and the width of the second lower hole section 3112 needs to be smaller than the width of the second upper hole section 3111 to fit the flattened planar area.

[0053] In this embodiment, the first folding drive mechanism 303 and the second folding drive mechanism 308 are mirror images of each other, the first rack 3032 meshes with the first right gear 3034, and the second rack 3082 meshes with the second left gear 3083.

[0054] In this embodiment, the number of teeth of the first right gear 3034 is twice the number of teeth of the first left gear 3033. After folding, the lower end of the heat exchange tube 002 in the first jacket hole 306 of the first right jacket 305 forms an angle α1 with the first folding direction, and the lower end of the heat exchange tube 002 in the first jacket hole 306 of the first left jacket 304 forms an angle α2 with the first folding direction, where α2 = 2 × α1. Therefore, this design ensures that the two adjacent rows of heat exchange tubes 002 are arranged in parallel after folding.

[0055] In this embodiment, the number of teeth of the second left gear 3083 is twice the number of teeth of the second right gear 3084. After folding, the lower end of the heat exchange tube 002 in the second jacket hole 311 of the second left jacket 309 forms an angle β1 with the second folding direction, and the lower end of the heat exchange tube 002 in the second jacket hole 311 of the second right jacket 310 forms an angle β2 with the second folding direction, where β2 = 2 × β1. Therefore, this design ensures that the two adjacent rows of heat exchange tubes 002 are arranged in parallel after folding.

[0056] Specifically, the first left gear 3033 has 14 teeth, the first right gear 3034 has 28 teeth, α1=60°, α2=120°, the first folding cylinder 3031 drives the first rack 3032 to move, which in turn drives the first right gear 3034 to rotate forward, which in turn drives the first right jacket 305 to rotate forward. Then the lower end of the heat exchange tube 002 in the first jacket hole 306 of the first right jacket 305 rotates forward by 60°. The first left gear 3033 meshes with the first right gear 3034, so the first left gear 3033 rotates in reverse, which in turn drives the first left jacket 304 to rotate in reverse. Then the lower end of the heat exchange tube 002 in the first jacket hole 306 of the first left jacket 304 rotates in the opposite direction by 120°.

[0057] More specifically, the second left gear 3083 has 28 teeth, the second right gear 3084 has 14 teeth, β1=60°, β2=120°, the second folding cylinder 3081 drives the second rack 3082 to move, which in turn drives the second left gear 3083 to reverse, which in turn drives the second left jacket 309 to reverse. Then the lower end of the heat exchange tube 002 in the second jacket hole 311 of the second left jacket 309 rotates 60° in the opposite direction. The second left gear 3083 meshes with the second right gear 3084, so the second right gear 3084 rotates forward, which in turn drives the second right jacket 310 to rotate forward. Then the lower end of the heat exchange tube 002 in the second jacket hole 311 of the second right jacket 310 rotates 120° in the forward direction.

[0058] In this embodiment, the first folding module further includes a first height adjustment mechanism 312. The first height adjustment mechanism 312 includes a first adjustment turntable 3121, a first adjustment shaft 3122, a first driving bevel gear 3123, a first driven bevel gear 3124, a first adjustment screw 3125, and a first nut seat 3126. The first adjustment turntable 3121 is connected to the first adjustment shaft 3122. The first adjustment shaft 3122 is mounted on the folding frame 301 through a first bearing seat. The first adjustment shaft 3122 is arranged in a horizontal direction. The first driving bevel gear 3123 is connected to the first adjustment shaft 3122 and meshes with the first driven bevel gear 3124. The first driven bevel gear 3124 is connected to the first adjustment screw 3125. The first adjustment screw 3125 is arranged in a vertical direction. The first nut seat 3126 is sleeved on the first adjustment screw 3125. The first clamping mechanism 302 is connected to the first nut seat 3126.

[0059] In this embodiment, the second folding module further includes a second height adjustment mechanism 313. The second height adjustment mechanism 313 includes a second adjustment turntable 3131, a second adjustment shaft 3132, a second driving bevel gear 3133, a second driven bevel gear 3134, a second adjustment screw 3135, and a second nut seat 3136. The second adjustment turntable 3131 is connected to the second adjustment shaft 3132. The second adjustment shaft 3132 is mounted on the folding frame 301 through a second bearing seat. The second adjustment shaft 3132 is arranged in a horizontal direction. The second driving bevel gear 3133 is connected to the second adjustment shaft 3132 and meshes with the second driven bevel gear 3134. The second driven bevel gear 3134 is connected to the second adjustment screw 3135. The second adjustment screw 3135 is arranged in a vertical direction. The second nut seat 3136 is sleeved on the second adjustment screw 3135. The second clamping mechanism 307 is connected to the first nut seat 3126. Therefore, the heights of the first clamping mechanism 302 and the second clamping mechanism 307 can be adjusted according to the different heights of the heat exchange tubes 002 by the first height adjustment mechanism 312 and the second height adjustment mechanism 313, thereby increasing the versatility of the folding station 3.

[0060] Specifically, the first clamping mechanism 302 includes a first guide rail bracket 3021, a first lifting seat 3022, a first lifting cylinder 3023, a first pad 3024, a first pressure plate 3025, and a first clamping cylinder 3026. The first guide rail bracket 3021 is connected to the folding frame 301. The first lifting seat 3022 is slidably connected to the first guide rail bracket 3021 in the vertical direction. The first lifting cylinder 3023 is connected to the first guide rail bracket 3021 and is also connected to the first lifting seat 3022 and used to drive the first lifting... The seat 3022 slides up and down. The first pad 3024 is connected to the first lifting seat 3022. The first pressure plate 3025 is connected to the moving end of the first clamping cylinder 3026. A first clamping cavity is formed between the first pressure plate 3025 and the first pad 3024 for the upper end of the heat exchange tube 002 to be inserted. The first clamping cylinder 3026 is connected to the first pad 3024. The first clamping cylinder 3026 is used to drive the first pressure plate 3025 to move toward the first pad 3024 to clamp the upper end of the heat exchange tube 002 onto the first pad 3024. The second clamping mechanism 307 includes a second guide rail bracket 3071, a second lifting seat 3072, a second lifting cylinder 3073, a second pad 3074, a second pressure plate 3075, and a second clamping cylinder 3076. The second guide rail bracket 3071 is connected to the folding frame 301. The second lifting seat 3072 is slidably connected to the second guide rail bracket 3071 in the vertical direction. The second lifting cylinder 3073 is connected to the second guide rail bracket 3071 and is also connected to the second lifting seat 3072 for driving the second lifting seat 3076. 072 slides up and down, the second pad 3074 is connected to the second lifting seat 3072, the second pressure plate 3075 is connected to the moving end of the second clamping cylinder 3076, and a second clamping cavity is formed between the second pressure plate 3075 and the second pad 3074 for the upper end of the heat exchange tube 002 to be inserted. The second clamping cylinder 3076 is connected to the second pad 3074 and is used to drive the second pressure plate 3075 to move toward the second pad 3074 to clamp the upper end of the heat exchange tube 002 onto the second pad 3074.

[0061] Therefore, by using the first lifting cylinder 3023 and the second lifting cylinder 3073 to drive the first lifting seat 3022 and the second lifting seat 3072 to descend, and then further fine-tuning the height of the first clamping mechanism 302 and the second clamping mechanism 307, the upper end of the heat exchange tube 002 can be just inserted between the first pad 3024 and the first pressure plate 3025 or between the second pad 3074 and the second pressure plate 3075. This facilitates the subsequent movement of the first clamping cylinder 3026 to drive the first pressure plate 3025 toward the first pad 3024 to clamp the upper end of the heat exchange tube 002 onto the first pad 3024, and the second clamping cylinder 3076 to drive the second pressure plate 3075 toward the second pad 3074 to clamp the upper end of the heat exchange tube 002 onto the second pad 3074.

[0062] In a preferred embodiment, see Figures 25-26 As shown, the heat dissipation mechanism 402 includes: two oppositely arranged heat dissipation side plates 40233, a heat dissipation channel is formed between the two heat dissipation side plates 40233, heat dissipation baffles 40236 are respectively provided at both ends of the heat dissipation channel, and a plurality of heat dissipation fins 004 are arranged sequentially between the two heat dissipation baffles 40236.

[0063] Specifically, the tablet stacking mechanism 402 includes a tablet stacking base 4021, a tablet pressing base 4022, and two parallel tablet stacking stations 4023. The tablet pressing base 4022 is mounted on the tablet stacking base 4021. Each tablet stacking station 4023 includes a tablet stacking lifting cylinder 40231, a tablet stacking lifting base plate 40232, two opposing tablet stacking side plates 40233, a tablet pressing cylinder 40234, and a tablet pressing plate 40235. The tablet stacking lifting cylinder 40231 is mounted on the tablet stacking base 4021 and drives the tablet stacking lifting base plate 40232 to move along the z-axis. The two tablet stacking side plates 40233... The tableting base 4021 is provided with a tableting channel formed between two tableting side plates 40233. The tableting lifting base plate 40232 is located in the tableting channel. The tableting lifting base plate 40232 is provided with tableting baffles 40236 at both ends. Multiple heat dissipation fins 004 are arranged sequentially between the two tableting baffles 40236. The tableting cylinder 40234 is provided on the tableting base 4022. The tableting plate 40235 is installed on the telescopic end of the tableting cylinder 40234 and is located above the tableting channel. The tableting cylinder 40234 is used to drive the tableting plate 40235 to move along the z-axis.

[0064] Therefore, the fin lifting cylinder 40231 drives the fin lifting base plate 40232 to rise and fall, facilitating the handling and placement of the heat exchanger 000 or the heat dissipation fins 004; the fin baffle 40236 can limit the two ends of the heat dissipation fins 004 in the x-axis direction, preventing the heat dissipation fins 004 from shifting or misaligning along the x-axis direction under the pushing force of the heat exchange coil 003; before the tube insertion operation begins, the pressing cylinder 40234 drives the pressing plate 40235 to move downward and press it against the top of the heat dissipation fins 004 in the fin insertion channel, forming a downward pressure constraint on the heat dissipation fins 004 in the z-axis direction, preventing the heat dissipation fins 004 from lifting or jumping along the z-axis direction under the pushing force of the heat exchange coil 003, thereby preventing scratches on the outer wall of the coil or bending deformation of the fins caused by misaligned tube insertion.

[0065] Specifically, the side plate 40233 is provided with a tray slot 40237, and the tray baffle 40236 can be fixed in the tray slot 40237.

[0066] More specifically, a detachable intermediate plate 40238 is provided on the fin-laying lifting base plate 40232. The intermediate plate 40238 is located between two fin-laying side plates 40233. A fin-laying channel can be formed between the intermediate plate 40238 and any of the fin-laying side plates 40233. A fin-laying slot 40237 for inserting a fin-laying baffle 40236 is provided on one and / or both sides of the intermediate plate 40238. The width of the fin-laying channel can be adjusted by the intermediate plate 40238 to accommodate heat dissipation fins 004 of different specifications, thereby improving the versatility of the fin-laying mechanism 402.

[0067] In a preferred embodiment, see Figure 27 As shown, the pipe-insertion hydraulic expansion station 4 also includes a pipe-insertion hydraulic expansion machine frame 404, a sheet-laying mechanism 402 is disposed on one end of the pipe-insertion hydraulic expansion machine frame 404, a pipe-insertion mechanism 401 is disposed on the other end of the pipe-insertion base, and a hydraulic expansion mechanism 403 is disposed on the outside of the pipe-insertion hydraulic expansion machine frame 404 and close to the sheet-laying mechanism 402.

[0068] In this embodiment, see Figures 27-35As shown, the tube threading mechanism 401 includes: a tube threading slide mechanism 4011, a rotating mechanism 4012, a tube threading platform 4013, a support plate assembly 4014, a tube pushing assembly 4015, and a tube threading drive mechanism 4016. The tube threading slide mechanism 4011 is located on one side of the tray arrangement mechanism 402. The rotating mechanism 4012 is mounted on the tube threading slide mechanism 4011. The tube threading slide mechanism 4011 is used to drive the rotating mechanism 4012 to move closer to or away from the tray arrangement mechanism 402 along the x-axis direction. The tube threading platform 4013 is mounted on the rotating mechanism 4012. The rotating mechanism 4012 is used to drive... The tube-passing platform 4013 rotates around the z-axis. The tube-passing drive mechanism 4016, the tube-pushing assembly 4015, and the support plate assembly 4014 are sequentially arranged on the tube-passing platform 4013 along the x-axis. Multiple rows of heat exchange coils 003, folded in half, are passed through the support plate assembly 4014, with the lower end of the heat exchange coils 003 facing the fin arrangement mechanism 402 and the upper end of the heat exchange coils 003 abutting against the tube-pushing assembly 4015. The tube-passing drive mechanism 4016 drives the tube-pushing assembly 4015 to move along the x-axis, thereby pushing the lower end of the heat exchange coils 003 to pass through multiple heat dissipation fins 004 in sequence.

[0069] Specifically, the tube-insertion slide mechanism 4011 includes a slide drive 40111 and a slide guide 40112. The slide drive 40111 is mounted on the tube-insertion hydraulic expansion machine frame 404. The rotation mechanism 4012 is connected to the telescopic end of the slide drive 40111 and is slidably connected to the slide guide 40112. The slide guide 40112 is arranged along the x-axis direction.

[0070] More specifically, the slide drive 40111 uses components that can achieve linear drive, such as hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0071] Specifically, the lower end of the rotating mechanism 4012 is provided with a sliding block 40113, which is slidably connected to the sliding guide rail 40112. The rotating mechanism 4012 drives the tube-inserting platform 4013 to rotate around the z-axis between a first position and a second position. When the tube-inserting platform 4013 is in the first position, it is parallel to the x-axis. When the tube-inserting platform 4013 is in the second position, it forms an angle with the x-axis. This allows the area of ​​the support plate assembly 4014 at the front end of the tube-inserting platform 4013, which is used to place the heat exchange coil 003, to rotate to the outside of the tube-inserting hydro-expansion frame 404, greatly expanding the manual operation space. This facilitates operators to quickly and easily insert the heat exchange coil 003 accurately into the support plate assembly 4014 for placement and positioning, thus improving overall production efficiency.

[0072] Specifically, the rotating mechanism 4012 includes a rotating base 40121, a rotating platform 40122, a rotating bearing 40123, and a rotating drive component 40124. The rotating base 40121 is slidably connected to the telescopic end of the tube-passing slide mechanism 4011. The lower end of the rotating platform 40122 is rotatably connected to the rotating base 40121 through the rotating bearing 40123. The upper end of the rotating platform 40122 is connected to the tube-passing platform 4013. The rotating drive component 40124 is mounted on the rotating base 40121, and the telescopic end of the rotating drive component 40124 is rotatably connected to the tube-passing platform 4013.

[0073] More specifically, the rotary drive component 40124 employs a linearly driven element, such as a hydraulic cylinder, pneumatic cylinder, or electric push rod, and has an angle with the x-axis. The rotary drive component 40124 can drive the tube-passing platform 4013 to rotate 45°-60° around the z-axis, causing the area of ​​the support plate assembly 4014 at the front end of the tube-passing platform 4013, which is used to place the heat exchange coil 003, to rotate to the outside of the tube-passing hydro-expansion frame 404.

[0074] More specifically, the rotating mechanism 4012 also includes a first limiting member 40125, a second limiting member 40126, a third limiting member 40127, and a fourth limiting member 40128. The first limiting member 40125 and the second limiting member 40126 are both disposed on the pipe-inserting hydraulic expansion machine frame 404. The third limiting member 40127 is assembled on the front end of the lower end face of the pipe-inserting platform 4013, and the fourth limiting member 40128 is assembled on the rear end of the lower end face of the pipe-inserting platform 4013. When the fourth limiting member 40128 abuts against the second limiting member 40126, the pipe-inserting platform 4013 is precisely stopped at the second position, that is, rotated to the extreme position outside the pipe-inserting hydraulic expansion machine frame 404. When the third limiting member 40127 abuts against the first limiting member 40125, the pipe-inserting platform 4013 is precisely reset to the first position, that is, the working position parallel to the x-axis. Therefore, this limiting method enables precise positioning of the two key stations of the pipe-threading platform 4013, avoiding over-rotation or incomplete reset.

[0075] Preferably, the first limiting member 40125 is a mechanical induction switch. When the sensing end of the mechanical induction switch senses the third limiting member 40127, it means that the tube-passing platform 4013 is reset to the first position.

[0076] Specifically, a positioning and fixing mechanism 405 is provided on the pipe-threading hydraulic expansion machine frame 404. The positioning and fixing mechanism 405 is located below the pipe-threading platform 4013 and between the pipe-threading mechanism 401 and the sheet-laying mechanism 402. The positioning and fixing mechanism 405 includes a positioning lifting cylinder 4051 and a fixing component 4052. The positioning lifting cylinder 4051 is mounted on the pipe-threading hydraulic expansion machine frame 404, and the fixing component 4052 is mounted on the moving end of the positioning lifting cylinder 4051. The positioning lifting cylinder 4051 is used to drive the fixing component 4052 to move along the z-axis. A fixing block 40131 is provided on the lower end face of the pipe-threading platform 4013, and a fixing hole 40132 is provided on the fixing block 40131 for the fixing component 4052 to be inserted. Thus, the fixing component 4052 and the fixing hole 40132 achieve precise fixing of the pipe-threading position of the pipe-threading platform 4013, ensuring the stability of the pipe-threading operation.

[0077] More specifically, after the tube-threading slide mechanism 4011 drives the rotating mechanism 4012 and the tube-threading platform 4013 to move to the preset tube-threading position, the positioning lifting cylinder 4051 drives the fixing component 4052 to rise along the z-axis, so that the fixing component 4052 is precisely inserted into the fixing hole 40132 of the fixing block 40131, thereby achieving rigid fixation of the tube-threading platform 4013 at the tube-threading position. This structural design can effectively prevent the tube-threading platform 4013 from shifting due to the reaction force generated by the pushing component 4015 during the tube-threading process, avoiding problems such as tube-threading jamming, fin damage, or deformation of the heat exchange coil 003 caused by the movement of the tube-threading platform 4013.

[0078] Specifically, the front end of the pipe-threading platform 4013 is provided with a limiting pin 40133, the axis of which is set along the x-axis. The pipe-threading hydraulic expansion frame 404 is provided with a limiting seat 4041, and the limiting seat 4041 is provided with a limiting hole 4042 for the insertion of the limiting pin 40133. During the process of the rotating mechanism 4012 and the pipe-threading platform 4013 moving to the preset pipe-threading position, the limiting pin 40133 and the limiting seat 4041 cooperate to play a guiding role. In addition, during the pipe-threading process, the limiting hole 4042 can limit the pipe-threading platform 4013 in the radial direction of the limiting pin 40133, so that the U-bend section of the heat exchange coil 003 corresponds to the arc-shaped slot 0042 and the square slot 0041 on the heat dissipation fins 004, thereby improving the accuracy of pipe threading.

[0079] Specifically, the tube-threading drive mechanism 4016 includes a first mounting base 40161, a tube-threading servo motor 40162, a drive wheel 40163, a transmission belt 40164, two sets of driven wheels 40165, and two tube-threading screws 40166. The first mounting base 40161 is disposed on the tube-threading platform 4013, the tube-threading servo motor 40162 is mounted on the first mounting base 40161, the drive wheel 40163 is directly connected to the motor shaft of the tube-threading servo motor 40162, and the two sets of driven wheels 4016... Five symmetrically arranged on both sides of the driving wheel 40163 and rotating in the same direction, the driving wheel 40163 and two sets of driven wheels 40165 are connected by a transmission belt 40164. Each tube-passing screw 40166 is connected to a corresponding set of driven wheels 40165 and is rotatably mounted on the tube-passing platform 4013 through bearings. The tube-passing screws 40166 are arranged along the x-axis. Both ends of the tube-pushing assembly 4015 are respectively mounted on a tube-passing screw 40166 and threadedly connected to the tube-passing screw 40166. Thus, only one tube-passing servo motor 40162 can drive two tube-passing screws 40166 to rotate synchronously, realizing synchronous transmission driven by a single power source, and improving the movement stability and force balance of the tube-pushing assembly 4015.

[0080] Specifically, the push tube assembly 4015 includes a push rod 40151 and a connecting plate 40152. The rear end of the push rod 40151 is connected to the connecting plate 40152. The front end of the push rod 40151 is provided with a push tube groove 40153. The push tube groove 40153 is recessed from the front end of the push rod 40151 towards the rear end face. The shape of the push tube groove 40153 matches the shape of the upper end of the heat exchange coil 003. The two ends of the connecting plate 40152 are respectively mounted on a tube threading screw 40166 and threadedly connected to the tube threading screw 40166. The tube threading drive mechanism 4016 is used to drive the connecting plate 40152 to move along the x-axis direction. Therefore, by forming a close fit between the push tube groove 40153 with the upper end of the heat exchange coil 003 through the matching shape, the contact area between the push rod 40151 and the heat exchange coil 003 can be effectively increased, avoiding slippage during the pushing process and ensuring the pushing force.

[0081] It should be noted that the design of the push tube groove 40153 abutting against the upper end of the heat exchange coil 003 ensures that the push tube assembly 4015 will not enter the internal area of ​​the heat dissipation fin 004 during the entire tube insertion process. Therefore, when the push tube assembly 4015 retracts along the x-axis after tube insertion, there is no possibility of contact with the heat dissipation fin 004. This fundamentally avoids the problem of the push rod 40151 getting stuck with the heat dissipation fin 004 during retraction, thereby preventing the heat dissipation fin 004 from deforming due to sticking and effectively ensuring the overall assembly accuracy and product quality of the heat exchanger 000.

[0082] More specifically, the end face of the connecting plate 40152 is provided with a connecting hole 40154, which extends laterally through the connecting plate 40152. The rear end face of the push rod 40151 is provided with a threaded hole coaxial with the connecting hole 40154. The push rod 40151 and the connecting plate 40152 are fastened by screwing through the connecting hole 40154 and screwing into the threaded hole. When replacing, the push rod 40151 can be removed simply by loosening the screw.

[0083] Specifically, the push tube assembly 4015 also includes a retaining plate 40155 and a mounting plate 40156. The retaining plate 40155 is slidably disposed on the tube-passing platform 4013. The retaining plate 40155 is provided with a retaining hole. The front end of the push rod 40151 passes through the retaining hole and slides with it. The mounting plate 40156 is mounted on the front end face of the connecting plate 40152. The mounting plate 40156 is provided with a mounting hole for the rear end of the push rod 40151 to pass through. Thus, through the cooperation of mounting plate 40156 and connecting plate 40152, the precise positioning and installation of the rear end of push rod 40151 is achieved, ensuring the coaxiality of the connection between push rod 40151 and connecting plate 40152, and avoiding deviation in the pushing direction caused by the installation offset of the rear end of push rod 40151; the holding plate 40155 forms a radial limit on the front end of push rod 40151 to ensure that push rod 40151 accurately abuts against the upper end of heat exchange coil 003 along a predetermined trajectory during the pushing process.

[0084] More specifically, mounting plate 40156 is fastened to connecting plate 40152 by screws.

[0085] Specifically, the support plate assembly 4014 includes a front support plate 40141 and at least one rear support plate 40142. The front support plate 40141 is disposed on the tube-passing platform 4013 and has a first guide hole 40143 for the evaporator coil to pass through. The rear support plate 40142 is slidably connected to the tube-passing platform 4013 and is located between the front support plate 40141 and the pusher assembly 4015. The rear support plate 40142 has a second guide hole 40144 for the evaporator coil to pass through, and the first guide hole 40143 matches the second guide hole 40144. Thus, the heat exchange coil 003 is precisely pre-aligned before being inserted through the first guide hole 40143 of the front support plate 40141. When the heat exchange coil 003 is placed, it enters the first guide hole 40143 and can be gradually guided and positioned by the first guide hole 40143, so that the posture of the heat exchange coil 003 is consistent with the subsequent insertion trajectory.

[0086] More specifically, the number of rear support plates 40142 can be adjusted according to the length of the heat exchange coil 003, so that after the heat exchange coil 003 enters the first guide hole 40143, it further passes through the second guide holes 40144 of each rear support plate 40142 in sequence. Through the synergistic effect of the front support plate 40141 and the rear support plate 40142, the dual positioning of the front and rear ends of the heat exchange coil 003 can be achieved.

[0087] More specifically, each rear support plate 40142 is provided with an anti-collision post 40145 on its end face facing the push tube assembly 4015, in order to limit the minimum distance between two adjacent rear support plates 40142, effectively avoid direct collision between adjacent rear support plates 40142 during the tube pushing or resetting process, and prevent damage such as deformation and guide hole displacement of the rear support plate 40142 due to collision.

[0088] More specifically, a reset drag chain 40146 is provided between the front support plate 40141 and the connecting plate 40152. Multiple rear support plates 40142 are spaced apart and connected to the reset drag chain 40146. Thus, the linkage relationship between the connecting plate 40152 and the rear support plates 40142 is established by the reset drag chain 40146. When the pipe is inserted, when the connecting plate 40152 moves along the negative x-axis (i.e., the retraction direction), the reset drag chain 40146 can synchronously drive each rear support plate 40142 to slide back to its initial position along the pipe insertion platform 4013. There is no need for manual operation of the rear support plates 40142 to reset, which simplifies the process flow and improves production continuity and ease of operation.

[0089] In a preferred embodiment, see Figures 36-38 As shown, the water expansion mechanism 403 includes: Water tank 4031; The inlet pipe 4032 is connected to the water tank 4031 at one end and to the heat exchange coil 003 at the other end. A water vortex pump 4033, a two-way ball valve 4034, a booster cylinder 4035, a two-way ball valve 4036 and a three-way ball valve 4037 are sequentially installed on the inlet pipe 4032 from the water tank 4031 toward the heat exchange coil 003. A digital pressure gauge 4038 is installed on the booster cylinder 4035 and the three-way ball valve 4037 is connected to an external air supply device. The return water pipe 4039 is connected at one end to the water tank 4031 and at the other end to the heat exchange coil 003. A two-way ball valve 40310 is installed on the return water pipe 4039. Thus, through the cooperation of the three-way ball valve 4037 and the external air supply device, the liquid medium in the inlet pipe 4032 and the heat exchange coil 003 can be pushed out together by the gas during the drainage process, and then flow back to the water tank 4031 through the return water pipe 4039, so as to realize the circulation of the medium and the cleaning of the pipe.

[0090] It should be noted that existing technologies use an insert-type expansion core to expand the coil, increasing its inner and outer diameters to a preset size to achieve a tight fit between the coil and the fins. However, the insertion of the expansion core through the inner wall of the coil can easily cause scratches and generate debris. This debris remains inside the coil, posing a risk of blockage and ultimately affecting the evaporator's performance. In contrast, the water expansion mechanism 403 of this invention achieves a tight fit between the heat exchange coil 003 and the heat dissipation fins 004 through medium filling and internal pressurization. During the entire expansion process, expansion is achieved solely through the interaction between the medium and the inner wall of the coil, without any rigid components (such as traditional push rods or expansion cores) penetrating the fin assembly or contacting the fins.

[0091] Specifically, the water tank 4031 provides the liquid medium to the entire water expansion mechanism 403; the water-pumping vortex pump 4033 provides power to deliver the liquid medium into the inlet pipe 4032; the two-way ball valve 4034 acts as an on / off component, closing after the heat exchange coil 003 is filled with liquid medium to prevent the liquid medium from flowing back to the water tank 4031 during pressurization, ensuring pressurization efficiency and expansion accuracy; the pressurization cylinder 4035 provides pressure through the piston rod's differential ratio, pressurizing the liquid medium in the heat exchange coil 003 that has already been filled with liquid medium to expand the heat exchange coil 003 so that it fits tightly with the heat dissipation fins 004; and the digital display pressure gauge 4038 displays the pressure in real time. Internal pressure; the three-way ball valve 4037 acts as an on / off component, connecting the liquid branch and closing the gas branch during the tube expansion process, and closing the liquid branch and connecting the gas branch after the tube expansion is completed. The external gas supply device supplies gas to the inlet pipe 4032, thereby pushing the liquid medium in the inlet pipe 4032 and the heat exchange coil 003 to be discharged back to the water tank 4031 from the return pipe 4039; the two-way ball valve 4036 acts as an on / off component, which can prevent gas from entering the booster cylinder 4035 during the drainage stage; the two-way ball valve 40310 acts as an on / off component, closing during the tube expansion process to achieve tube cavity sealing during the expansion stage, and opening during the drainage process to ensure that the liquid medium is discharged back to the water tank 4031 during the drainage stage.

[0092] More specifically, the liquid medium is water or alcohol. Alcohol is more volatile than water, so there is no residue in the heat exchange coil 003 after the drainage is completed.

[0093] In this embodiment, the plate arrangement mechanism 402 is provided with a pipeline adjustment mechanism 406. The pipeline adjustment mechanism 406 is used to adjust the position of the inlet pipe 4032 and the return pipe 4039 in the z-axis and y-axis directions, so as to facilitate the operator to connect the other end of the inlet pipe 4032 to the heat exchange coil 003 and the other end of the return pipe 4039 to the heat exchange coil 003.

[0094] Specifically, the inlet pipe 4032 and the return pipe 4039 are flexible hoses.

[0095] More specifically, the pipeline adjustment mechanism 406 includes a y-axis adjustment slide 4061, a slide plate 4062, an adjustment drive 4063, and a hanging plate 4064. The y-axis adjustment slide 4061 is arranged along the y-axis direction and is located above two parallel sheet-laying stations 4023. The slide plate 4062 is slidably arranged on the y-axis adjustment slide 4061. The y-axis adjustment slide 4061 can drive the slide plate 4062 to move between the two sheet-laying stations 4023. The adjustment drive 4063 is arranged on the slide plate 4062. The hanging plate 4064 is arranged on the telescopic end of the adjustment drive 4063. The adjustment drive 4063 is used to drive the hanging plate 4064 to move along the z-axis direction. The other end of the inlet pipe 4032 and the other end of the return pipe 4039 are both connected to the hanging plate 4064.

[0096] More specifically, the adjustment drive 4063 uses components that can achieve linear drive, such as hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0097] A single-tube finned heat exchanger 000, manufactured using a heat exchanger processing system according to any of the above embodiments, includes: a finned assembly and a heat exchange coil 003, see below. Figure 1 As shown, the fin assembly consists of several heat dissipation fins 004 arranged in parallel with a certain distance from each other, and the heat exchange coil 003 consists of a multi-layer structure composed of a heat exchange tube 001 bent into multiple continuous U-shaped segments. The heat exchange coil 003 is inserted into each heat dissipation fin 004 of the fin assembly and is tightly attached to the heat dissipation fin 004. The multi-layer structure includes at least one upper horizontal pipe layer 0031 and at least one lower horizontal pipe layer 0032. The upper horizontal pipe layer 0031 and the lower horizontal pipe layer 0032 are alternately spaced along the z-axis. The corresponding ends of adjacent upper horizontal pipe layers 0031 and lower horizontal pipe layers 0032 are integrally connected by a first inclined U-bend 0033 having a first folding direction. The corresponding ends of the lower horizontal pipe layer 0032 and the adjacent next-to-next upper horizontal pipe layer 0031 are integrally connected by a second inclined U-bend 0034 having a second folding direction. The first folding direction and the second folding direction are opposite. Each upper horizontal pipe layer 0031 and lower horizontal pipe layer 0032 includes a first U-bend 0035, a second U-bend 0036, and a straight pipe section 0037. The two ends of the straight pipe section 0037 are integrally connected to the first U-bend 0035 and the second U-bend 0036 respectively. All first U-bends 0035 on the same side are arranged in parallel, and all second U-bends 0036 on the same side are arranged in parallel. One end of the heat exchange tube 001 forms the fluid inlet end of the heat exchange coil 003, and the other end of the heat exchange tube 001 forms the fluid outlet end of the heat exchange coil 003.

[0098] In a preferred embodiment, each first U-bend 0035 has a flattened surface formed on both sides, and each heat dissipation fin 004 has a plurality of fin holes. Each fin hole includes a square slot 0041 for the first U-bend 0035 to pass through and an arc-shaped slot 0042 for the straight pipe section 0037 to pass through. The height of the square slot 0041 matches the spacing between the flattened surfaces formed on both sides of the first U-bend 0035, and the diameter of the arc-shaped slot 0042 matches the outer diameter of the straight pipe section 0037. The edge of each arc-shaped slot 0042 has an outwardly protruding limiting flange 0043, which abuts against the adjacent heat dissipation fin 004.

[0099] A heat exchanger manufacturing process, wherein a tube-type finned heat exchanger 000 is obtained by processing a heat exchanger manufacturing system according to any of the above embodiments, wherein the manufacturing process includes the following steps: Step S1, pipe bending process: A heat exchange tube 001 without welds is bent into a heat exchange tube 002 through the pipe bending station. The bent heat exchange tube 002 is composed of multiple continuous U-shaped sections arranged in a serpentine structure. Step S2, flattening process: The lower end of the heat exchange tube 002, which has been bent and laid flat in step S1, is inserted into the flattening cavity 105 in sequence. The moving end of the pressing drive mechanism 104 drives the pressing mold 103 to approach the fixed mold 102 to flatten the lower end of the heat exchange tube 002. Step S3, Shaping process: The heat exchange tube 002, which has been flattened in step S2, is placed on the shaping station 2. The upper end of the heat exchange tube 002 is inserted into the blocking cavity 2021. The middle clamping mechanism 203 clamps the middle part of the heat exchange tube 002. The shaping drive mechanism 205 drives the shaping mechanism 204 to move along the x-axis, so that the lower end of the flattened heat exchange tube 002 is inserted into the shaping cavity 2041 to shape the U-shaped bend deformed at the flattened part. Step S4, Folding Process: The heat exchanger tube 002, after being shaped in step S3, is placed on the first folding module. The first folding module is used to fix the upper end of the heat exchanger tube 002 and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchanger tube 002, which is fixed in part, forms the first folding direction. Then, the heat exchanger tube 002, after being folded by the first folding module, is placed on the second folding module. The second folding module is used to fix the upper end of the heat exchanger tube 002 and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchanger tube 002, which is fixed in part, forms the second folding direction. The flat heat exchanger tube 002 is folded into multiple rows of heat exchanger coils 003 through the first folding module and the second folding module. Step S5, fin arrangement process: Place one fin arrangement baffle 40236 at one end of the fin arrangement channel, arrange multiple heat dissipation fins 004 sequentially from one end of the fin arrangement channel to the other end, and then place another fin arrangement baffle 40236 at the other end of the fin arrangement channel to complete the fin arrangement operation. Step S6, Tube insertion preparation process: The rotating mechanism 4012 drives the tube insertion platform 4013 to rotate around the z-axis by a certain angle, so that the support plate assembly 4014 faces the outside of the tube insertion mechanism 401. The heat exchange coils 003, which are folded into multiple rows, are inserted into the support plate assembly 4014. The upper end of the heat exchange coil 003 abuts against the push tube assembly 4015. The rotating mechanism 4012 drives the tube insertion platform 4013 to rotate around the z-axis to reset, so that the lower end of the heat exchange coil 003 faces the plate arrangement channel. The tube insertion slide mechanism 4011 drives the rotating mechanism 4012 to approach the plate arrangement channel along the x-axis. Step S7, tube threading process: The tube threading drive mechanism 4016 drives the tube pusher assembly 4015 to move along the x-axis direction, thereby pushing the lower end of the heat exchange coil 003 through multiple heat dissipation fins 004 in sequence. Step S8, Tube insertion and resetting process: The tube insertion drive mechanism 4016 drives the tube push assembly 4015 away from the heat exchange coil 003 along the x-axis until it separates from the upper end of the heat exchange coil 003. Step S9, Tube Expansion Process: Connect one end of the inlet pipe 4032 to the fluid inlet end of the heat exchange coil 003, and connect the other end of the return pipe 4039 to the fluid outlet end of the heat exchange coil 003. Open the liquid passages of two-way ball valve 4034, two-way ball valve 4036, and three-way ball valve 4037, and open two-way ball valve 40310. Use the water vortex pump 4033 to pump liquid medium into the inlet pipe 4032 until the inlet pipe 4032 and the heat exchange coil 003 are filled with liquid medium. After the heat exchange coil 003 is filled with liquid medium, the two-way ball valve 4034 and the two-way ball valve 40310 are closed to prevent the liquid medium in the inlet pipe 4032 from flowing back to the water tank 4031 and to seal the pressurization pipeline. Then, the pressurization cylinder 4035 pressurizes the liquid medium in the inlet pipe 4032 and the heat exchange coil 003, causing the heat exchange coil 003 to expand and deform, and then to make close contact with the heat dissipation fins 004 (that is, the outer diameter of the heat exchange coil 003 is circumferentially and tightly fitted with the arc-shaped groove 0042 of the fin hole), and the pressure is maintained for 1 second to 2 seconds. Step S10, Drainage process: After the expansion is completed, the liquid passages of the two-way ball valve 4036 and the three-way ball valve 4037 are closed, the two-way ball valve 40310 is opened, the gas passage of the three-way ball valve 4037 is opened, and the external gas supply device supplies gas to the inlet pipe 4032. The gas pushes the liquid medium remaining in the inlet pipe 4032 and the heat exchange coil 003 through the return pipe 4039 back to the water tank 4031. Step S11: Disconnect the inlet pipe 4032 from the fluid inlet end, disconnect the return pipe 4039 from the fluid outlet end, and remove the expanded tube finned heat exchanger 000 from the finned channel.

[0100] The above description is based on the preferred embodiments of the present invention. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A processing system for a heat exchanger, characterized in that, include: A tube bending station is used to bend a heat exchange tube (001) into a snake-shaped heat exchange tube (002); Flattening station (1), the flattening station (1) is used to flatten the lower end of the heat exchange pipe (002); Shaping station (2), the shaping station (2) is used to shape the U-shaped bend deformed at the flattened part of the heat exchange pipe (002); The folding station (3) is used to fold the shaped heat exchange tubes (002) into heat exchange coils (003) with multiple rows of structures. The tube-insertion water expansion station (4) includes a tube-insertion mechanism (401), a fin arrangement mechanism (402), and a water expansion mechanism (403). The fin arrangement mechanism (402) is used to arrange multiple heat exchange fins (004) sequentially. The tube-insertion mechanism (401) is used to insert heat exchange coils (003) that are folded in half to form multiple rows into multiple heat exchange fins (004). The water expansion mechanism (403) is used to expand and deform the heat exchange coils (003) so that they can come into close contact with the heat exchange fins (004).

2. The processing system for a heat exchanger as described in claim 1, characterized in that, The flattening station (1) includes: a flattening frame (101), a fixed mold (102), a pressing mold (103), and a pressing drive mechanism (104). The pressing drive mechanism (104) is disposed on the flattening frame (101). The pressing mold (103) is disposed on the moving end of the pressing drive mechanism (104). The fixed mold (102) is located above the pressing mold (103). A flattening cavity (105) is formed between the pressing mold (103) and the fixed mold (102) for the lower end of the heat exchange tube (002) to be inserted. The moving end of the pressing drive mechanism (104) drives the pressing mold (103) to approach the fixed mold (102) to flatten the lower end of the heat exchange tube (002).

3. The processing system for a heat exchanger as described in claim 1, characterized in that, The shaping station (2) includes: a shaping frame (201), and a tail blocking mechanism (202), a middle clamping mechanism (203), a shaping mechanism (204), and a shaping drive mechanism (205) sequentially arranged on the shaping frame (201). The tail blocking mechanism (202) has a blocking cavity (2021) for inserting the upper end of the heat exchange tube (002). The blocking cavity (2021) is used to restrict the heat exchange tube (002) from moving along the x-axis. The middle clamping mechanism (203) is used to clamp the middle part of the heat exchange tube (002), and the shaping driving mechanism (205) is used to drive the shaping mechanism (204) to move along the x-axis. The shaping mechanism (204) has a shaping cavity (2041) for inserting the lower end of the flattened heat exchange tube (002). The shaping cavity (2041) has a square shaping slot (20411) to accommodate the flattened part of the heat exchange tube (002).

4. The processing system for a heat exchanger as described in claim 1, characterized in that, The folding station (3) includes: a folding frame (301), and a first folding module and a second folding module disposed on the folding frame (301). The first folding module is used to fix the upper end of the heat exchange tube (002) and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube (002) with a part fixed forms a first folding direction. The second folding module is used to fix the upper end of the heat exchange tube (002) and two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube (002) with another part fixed forms a second folding direction. The first folding direction is opposite to the second folding direction.

5. The processing system for a heat exchanger as described in claim 1, characterized in that, The fin arrangement mechanism (402) includes: two oppositely arranged fin arrangement side plates (40233), a fin arrangement channel is formed between the two fin arrangement side plates (40233), fin arrangement baffles (40236) are respectively provided at both ends of the fin arrangement channel, and a plurality of heat dissipation fins (004) are arranged sequentially between the two fin arrangement baffles (40236).

6. The processing system for a heat exchanger as described in claim 1, characterized in that, The tube threading mechanism (401) includes: a tube threading slide mechanism (4011), a rotating mechanism (4012), a tube threading platform (4013), a support plate assembly (4014), a tube pushing assembly (4015), and a tube threading drive mechanism (4016). The tube threading slide mechanism (4011) is located on one side of the sheet arrangement mechanism (402). The rotating mechanism (4012) is mounted on the tube threading slide mechanism (4011). The tube threading slide mechanism (4011) is used to drive the rotating mechanism (4012) to move closer to or away from the sheet arrangement mechanism (402) along the x-axis. The tube threading platform (4013) is mounted on the rotating mechanism (4012). The rotating mechanism (4012) is used to drive the rotating mechanism (4012) to move closer to or away from the sheet arrangement mechanism (402) along the x-axis. The tube-passing platform (4013) is driven to rotate around the z-axis. The tube-passing drive mechanism (4016), the tube-pushing assembly (4015), and the support plate assembly (4014) are sequentially arranged on the tube-passing platform (4013) along the x-axis. Multiple rows of heat exchange coils (003) formed by folding are passed through the support plate assembly (4014), and the lower end of the heat exchange coil (003) faces the fin arrangement mechanism (402). The upper end of the heat exchange coil (003) abuts against the tube-pushing assembly (4015). The tube-passing drive mechanism (4016) drives the tube-pushing assembly (4015) to move along the x-axis, thereby pushing the lower end of the heat exchange coil (003) to pass through multiple heat dissipation fins (004) in sequence.

7. The processing system for a heat exchanger as described in claim 1, characterized in that, The water expansion mechanism (403) includes: Water tank (4031); A water inlet pipe (4032) is provided, one end of which is connected to the water tank (4031), and the other end of which is connected to the heat exchange coil (003). A water pump (4033), a two-way ball valve (4034), a booster cylinder (4035), a two-way ball valve (4036), and a three-way ball valve (4037) are sequentially arranged on the water inlet pipe (4032) from the water tank (4031) to the heat exchange coil (003). The three-way ball valve (4037) is connected to an external air supply device. The return water pipe (4039) is connected at one end to the water tank (4031) and at the other end to the heat exchange coil (003). A two-way ball valve (40310) is installed on the return water pipe (4039).

8. A tube-type finned heat exchanger manufactured using a heat exchanger processing system as described in any one of claims 1 to 7, characterized in that, include: The fin assembly and heat exchange coil (003) are provided. The fin assembly consists of several heat dissipation fins (004) arranged in parallel and at a certain distance from each other. The heat exchange coil (003) consists of a multi-layer structure in which a heat exchange tube (001) is bent into multiple continuous U-shaped segments. The heat exchange coil (003) is inserted through each of the heat dissipation fins (004) of the fin assembly and is tightly attached to the heat dissipation fins (004). The multi-layer structure includes at least one upper horizontal pipe layer (0031) and at least one lower horizontal pipe layer (0032). The upper horizontal pipe layer (0031) and the lower horizontal pipe layer (0032) are alternately spaced along the z-axis. The corresponding ends of adjacent upper horizontal pipe layers (0031) and lower horizontal pipe layers (0032) are integrally connected by a first inclined U-bend (0033) with a first folding direction. The corresponding ends of the lower horizontal pipe layer (0032) and the adjacent next upper horizontal pipe layer (0031) are integrally connected by a second inclined U-bend (0034) with a second folding direction. The first folding direction and the second folding direction are opposite. Each upper horizontal pipe layer (0031) and lower horizontal pipe layer (0032) includes a first U-bend (0035), a second U-bend (0036), and a straight pipe section (0037). The two ends of the straight pipe section (0037) are integrally connected to the first U-bend (0035) and the second U-bend (0036) respectively. All first U-bends (0035) on the same side are arranged in parallel, and all second U-bends (0036) on the same side are arranged in parallel. One end of the heat exchange tube (001) forms the fluid inlet end of the heat exchange coil (003), and the other end of the heat exchange tube (001) forms the fluid outlet end of the heat exchange coil (003).

9. The single-tube finned heat exchanger as described in claim 8, characterized in that, Each of the first U-bend segments (0035) has a flattened surface formed on both sides. Each of the heat dissipation fins (004) has a plurality of fin holes. Each of the fin holes includes a square slot (0041) for the first U-bend segment (0035) to pass through and an arc-shaped slot (0042) for the straight pipe segment (0037) to pass through. The height of the square slot (0041) matches the spacing between the flattened surfaces formed on both sides of the first U-bend segment (0035). The diameter of the arc-shaped slot (0042) matches the outer diameter of the straight pipe segment (0037). The edge of each arc-shaped slot (0042) has an outwardly protruding limiting flange (0043). The limiting flange (0043) abuts against the adjacent heat dissipation fin (004).

10. A processing method for a heat exchanger, employing a processing system for a heat exchanger as described in any one of claims 1 to 7, characterized in that, The processing technology includes the following steps: Step S1, pipe bending process: A heat exchange tube (001) without weld seam is bent into a heat exchange tube (002) through the pipe bending station. The bent heat exchange tube (002) is composed of multiple continuous U-shaped sections arranged in a serpentine structure. Step S2, flattening process: The lower end of the heat exchange tube (002) that has been bent and laid flat in step S1 is inserted into the flattening cavity (105) in sequence. The pressing drive mechanism (104) drives the pressing mold (103) to approach the fixed mold (102) to flatten the lower end of the heat exchange tube (002). Step S3, Shaping process: The heat exchange tube (002) flattened in step S2 is placed on the shaping station (2). The upper end of the heat exchange tube (002) is inserted into the blocking cavity (2021). The middle clamping mechanism (203) clamps the middle part of the heat exchange tube (002). The shaping drive mechanism (205) drives the shaping mechanism (204) to move along the x-axis, so that the lower end of the flattened heat exchange tube (002) is inserted into the shaping cavity (2041) to shape the U-shaped bend deformed at the flattened part. Step S4, Folding process: The heat exchange tube (002) after being shaped in step S3 is placed on the first folding module. The first folding module is used to fix the upper end of the heat exchange tube (002) and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube (002) with a part fixed forms the first folding direction. Then, the heat exchange tube (002) after being folded by the first folding module is placed on the second folding module. The second folding module is used to fix the upper end of the heat exchange tube (002) and the two lower ends adjacent to the upper end, and drive the two lower ends to rotate in opposite directions so that the upper end of the heat exchange tube (002) with another part fixed forms the second folding direction. The flat heat exchange tube (002) is folded into multiple rows of heat exchange coils (003) through the first folding module and the second folding module. Step S5, fin arrangement process: Place one fin arrangement baffle (40236) at one end of the fin arrangement channel, arrange multiple heat dissipation fins (004) sequentially from one end of the fin arrangement channel to the other end, and then place another fin arrangement baffle (40236) at the other end of the fin arrangement channel to complete the fin arrangement operation. Step S6, Tube insertion preparation process: The rotating mechanism (4012) drives the tube insertion platform (4013) to rotate around the z-axis by a certain angle, so that the support plate assembly (4014) faces the outside of the tube insertion mechanism (401), and the heat exchange coils (003) arranged in multiple rows are inserted into the support plate assembly (4014). The upper end of the heat exchange coils (003) abuts against the push tube assembly (4015). The rotating mechanism (4012) drives the tube insertion platform (4013) to rotate and reset around the z-axis, so that the lower end of the heat exchange coils (003) faces the plate arrangement channel. The tube insertion slide mechanism (4011) drives the rotating mechanism (4012) to approach the plate arrangement channel along the x-axis. Step S7, Pipe threading process: The tube pusher assembly (4015) moves and pushes the lower end of the heat exchange coil (003) through multiple heat dissipation fins (004) in sequence; Step S8, Tube resetting process: The tube driving mechanism (4016) drives the tube pushing assembly (4015) away from the heat exchange coil (003) along the x-axis until it separates from the upper end of the heat exchange coil (003); Step S9, tube expansion process: Connect one end of the inlet pipe (4032) to the fluid inlet end of the heat exchange coil (003), and connect the other end of the return pipe (4039) to the fluid outlet end of the heat exchange coil (003). Open the liquid passages of two-way ball valve one (4034), two-way ball valve two (4036), and three-way ball valve (4037), and open two-way ball valve three (40310). Fluid is then pumped into the inlet pipe (4032) by the water vortex pump (4033) until the inlet pipe (4032) and the heat exchange coil (003) are connected. After the inlet pipe (4032) and heat exchange coil (003) are filled with fluid, the two-way ball valve one (4034) and the two-way ball valve three (40310) are closed to prevent the fluid in the inlet pipe (4032) from flowing back to the water tank (4031) and to seal the pressurization pipeline. Then, the pressurization cylinder (4035) pressurizes the fluid in the inlet pipe (4032) and heat exchange coil (003), causing the heat exchange coil (003) to expand and deform, and then to make close contact with the heat dissipation fins (004), and maintain the pressure for 1s to 2s. Step S10, Drainage process: After the expansion tube is completed, the liquid passage of the two-way ball valve (4036) and the three-way ball valve (4037) is closed, the two-way ball valve (40310) is opened, the gas passage of the three-way ball valve (4037) is opened, the external gas supply device supplies gas into the water inlet pipe (4032), and the gas pushes the liquid remaining in the water inlet pipe (4032) and the heat exchange coil (003) to be discharged back to the water tank (4031) through the return water pipe (4039); Step S11: Disconnect the inlet pipe (4032) from the fluid inlet end, disconnect the return pipe (4039) from the fluid outlet end, and remove the expanded tube finned heat exchanger (000) from the finned channel.

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