An air-cooled flux collection device for reflow ovens

Abstract

This invention relates to the field of flux collection technology for reflow soldering furnaces, and particularly to an air-cooled flux collection device for reflow soldering furnaces. The device includes a modular box with a movable plate snapped onto its side. A condensation mechanism is located inside the box, with a flow guiding mechanism on its side. A collection mechanism is also located inside the condensation mechanism, including a collection plate with a collection cavity on its side. Inner cylinders are equidistantly arranged inside the modular box corresponding to the collection cavities. This invention, by incorporating the condensation, flow guiding, and collection mechanisms, allows for centralized collection of flux vapor inside the reflow soldering furnace, preventing waste. It also ensures that flux vapor does not flow to the cooling module during gas circulation within the furnace. After flux recovery, residual heat can be reused, reducing energy consumption. Manual flux wiping is unnecessary, and the flux can be collected centrally for convenient retrieval.

Description

Technical Field

[0001] This invention relates to the field of flux collection technology for reflow ovens, and in particular to an air-cooled flux collection device for reflow ovens. Background Technology

[0002] A reflow oven is a device used for soldering circuit boards containing electronic components. It provides a heated environment that melts the solder paste, allowing surface-mount components and the circuit board to be reliably bonded together through the solder paste alloy. In addition to the heating module, a reflow oven typically includes a cooling module to maintain metallurgical properties and reduce the exit temperature of the board. In air reflow ovens, flux vapor is directly expelled from the oven before cooling, preventing flux condensation from remaining in the cooling module and thus avoiding flux waste.

[0003] In most nitrogen-protected reflow ovens, to reduce nitrogen (N2) consumption, the internal mixed gas is circulated, and flux vapor cannot be directly discharged from the oven. Therefore, the flux vapor has the opportunity to come into full contact with the cooling module, causing its temperature to drop below 110°C and condensation to occur. This condensed flux adheres to the reflow orifice plate of the cooling module. When the liquid flux accumulates to a certain extent, it forms droplets that eventually drip down, with a high probability of dripping onto the circuit board (PCB), causing the PCB to fail quality tests or even be scrapped.

[0004] To prevent such incidents, the common practice in the industry is to regularly wipe and clean the flux on the surface of the return orifice plate in the cooling zone manually, or to recover the flux inside the steam by adding a recovery module. However, existing recovery devices generally cool the flux directly into liquid and let it flow into the collection box for collection. This causes a sudden drop in gas temperature, and when circulating it back into the furnace, a heating module is needed to add it again, resulting in increased energy consumption. Furthermore, the flux will stick to the inside of the collection box after cooling, making it difficult to retrieve and recover the flux later. Therefore, we propose an air-cooled flux collection device for reflow ovens. Summary of the Invention

[0005] In order to overcome the technical problems existing in the prior art, the present invention provides an air-cooled flux collection device for reflow ovens.

[0006] To solve the above technical problems, the present invention provides the following technical solution: including a module box, a movable plate snapped onto the side of the module box, a condensation mechanism inside the module box, a flow guiding mechanism on the side of the condensation mechanism, and a collection mechanism inside the condensation mechanism;

[0007] The condensation mechanism includes a collection plate with a collection cavity on its side. Inside the module box, an inner cylinder is equidistantly arranged at the position corresponding to the collection cavity. Temperature-conducting plates are fixedly installed at equal intervals on the side of the inner cylinder, and an outer cylinder is fixedly installed on the side of the inner cylinder.

[0008] The flow guiding mechanism includes a mounting box, an inner cavity is opened on the lower side of the mounting box, an adjusting cylinder is movably installed inside the inner cavity, a first guide groove and a second guide groove are opened on the side of the adjusting cylinder, a locking block and a first electric push rod are provided on the inner side of the adjusting cylinder, and a first exhaust pipe and a second exhaust pipe are respectively arranged alternately on the side of the mounting box.

[0009] The collecting mechanism includes a linkage rod, on the side of which are a first gear, a second gear, and a motor. On the upper side of the linkage rod is a second electric push rod. On the side of the linkage rod, corresponding to the inner side of the inner cylinder, are a scraper, a first connecting rod, and a second connecting rod.

[0010] Furthermore, the collecting plate is movably disposed inside the module box and is fixedly installed on the side of the movable plate. An air inlet groove is provided on the side of the collecting plate, extending through it to the inside of all collecting chambers. A first air inlet pipe is fixedly installed through the side of the module box and is snapped into the air inlet groove.

[0011] Furthermore, the inner cylinder is attached to the side of the collecting plate, the outer cylinder covers the temperature guiding plate, and the side of the outer cylinder is fixedly installed with second air inlet pipes at equal intervals, and the second air inlet pipes pass through the outer cylinder and the module box respectively, connecting the interior of all outer cylinders.

[0012] Furthermore, the mounting box is fixedly installed on the top side inside the module box and is fixedly connected to the upper side of the inner cylinder and the outer cylinder. The inner cavity corresponds to the position of the outer cylinder and the inner cylinder. The side of the adjusting cylinder maintains a distance from the inner cavity wall. The first guide groove is opened on the side of the adjusting cylinder corresponding to the position of the first protrusion of the inner cavity, and the second guide groove is opened on the side of the adjusting cylinder corresponding to the position of the second protrusion of the inner cavity.

[0013] Furthermore, the inner side of the regulating cylinder is provided with a slot, the locking block is movably installed inside the slot, the first electric push rod is fixedly set between the side of the locking block and the wall of the slot, and the ports of the first exhaust pipe and the second exhaust pipe respectively penetrate through the mounting box to two protrusions in the inner cavity and correspond to the positions of the first exhaust pipe and the air outlet of the first guide groove.

[0014] Furthermore, the linkage rod is located inside the inner cylinder, and a constraint groove is provided on the side of the linkage rod. The first gear is movably sleeved on the side of the linkage rod and meshes with it inside the constraint groove. A timing belt is meshed on the side of the first gear. The second gear is located on the upper side of the module box and meshes with it inside the timing belt. The motor is fixedly installed on the upper side of the timing belt.

[0015] Furthermore, the output end of the second electric actuator has a mating cavity, and the linkage rod is rotatably installed inside the mating cavity. A connecting air pipe is fixedly installed on the wall of the mating cavity and passes through the mating cavity.

[0016] Furthermore, the scraper is fitted to the inner side of the inner cylinder, the first connecting rod and the second connecting rod are fixedly installed on both sides of the scraper and are also fixedly connected to the side of the linkage rod. The scraper has a flow guide cavity inside, and the two walls of the flow guide cavity have exhaust holes at equal intervals. The upper side of the linkage rod has a connecting groove that passes through the first connecting rod and the second connecting rod to the inside of the flow guide cavity.

[0017] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0018] 1. This invention, by setting up a condensation mechanism, a flow guiding mechanism, and a collection mechanism, enables the centralized collection of flux vapor inside the reflow oven, avoiding waste and ensuring that flux vapor does not flow to the cooling module when the gas circulates inside the oven. After recovering the flux, the residual heat can be reused to reduce the energy consumption of the equipment. There is no need to manually wipe the flux, and the flux can be centrally collected and easily retrieved later.

[0019] 2. By setting up a condensation mechanism and a flow guiding mechanism, the present invention can modularly add corresponding components according to needs, stably recover flux vapor, and can cooperate with the furnace cold air to cool the corresponding components, so that the flux inside the vapor is condensed and collected. The cold air that takes away heat can be combined with the condensed vapor to form warm gas and circulate back to the furnace, reducing the energy consumption of the corresponding heating module for heating the gas and avoiding heat waste.

[0020] 3. This invention, by setting up a collection mechanism, can perform corresponding unified driving and can scrape the recovered flux to make it better recovered. In addition, it can be connected with internal component pipelines to allow warm gas to be circulated and recovered, ensuring the recovery effect of flux.

[0021] 4. This invention incorporates a heat-conducting plate, which conducts heat to the side of the inner cylinder. When cold air carries away the heat from the side of the heat-conducting plate and circulates, the plate absorbs heat and cools the inner cylinder. When the cold air does not circulate, the temperature on the side of the inner cylinder is kept warm, and the inner cylinder does not cool down. This design can be adapted to different needs to enable the inner cylinder to achieve both cooling and heat preservation.

[0022] 5. This invention, by setting up an adjusting cylinder and its surrounding components, allows the second guide groove to connect with the inside of the outer cylinder when the adjusting cylinder is in its default state, enabling the cold air to carry away the heat from the temperature-conducting plate. When the adjusting cylinder is driven, the second guide groove is not connected with the inside of the outer cylinder, allowing the cold air to remain inside the outer cylinder, thus enabling the inner cylinder to switch between different states. In addition, the first electric push rod pushes the locking block to fit against the side of the linkage rod, which drives the adjusting cylinder to rotate under the drive of the linkage rod. This eliminates the need for an additional drive motor to drive the adjusting cylinder, further reducing energy consumption during equipment use.

[0023] 6. By setting a first gear and its surrounding components, the present invention can drive all the first gears to rotate by setting a synchronous belt, so that the first gear drives the linkage rod to rotate, and only one set of motors is needed to drive it, reducing the energy consumption of the equipment; in addition, the first gear can slide inside the constraint groove, so that the linkage rod can also be driven to rotate when it moves up and down inside the second gear.

[0024] 7. This invention, by setting up a connecting air pipe, a scraper and its surrounding components, can drive the linkage rod to perform lifting and lowering operations through the connecting air pipe. This allows the scraper to be attached to the inner side of the inner cylinder to scrape the flux on the side of the inner cylinder. Alternatively, the scraper and the first connecting rod can be attached to the side and bottom of the collection chamber to scrape and break up the flux inside the collection chamber, preventing the flux inside the collection chamber from cooling and caking and becoming impossible to remove later, thus facilitating subsequent material retrieval. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the half-section structure of the present invention;

[0027] Figure 3 This is an exploded structural diagram of the condensation mechanism of the present invention;

[0028] Figure 4 This is a partial structural schematic diagram of the outer cylinder of the present invention;

[0029] Figure 5 This is a partial exploded structural diagram of the flow guiding mechanism of the present invention;

[0030] Figure 6 For the present invention Figure 2 A magnified structural diagram at point A;

[0031] Figure 7 This is a partial structural schematic diagram of the second electric actuator of the present invention;

[0032] Figure 8 This is a schematic diagram of a partial explosion structure of the collection mechanism of the present invention.

[0033] The components include: 1. Module box; 11. Movable plate; 2. Condensation mechanism; 21. Collection plate; 211. Air inlet slot; 22. Collection chamber; 23. First air inlet pipe; 24. Outer cylinder; 241. Second air inlet pipe; 25. Inner cylinder; 26. Temperature guide plate; 3. Flow guiding mechanism; 31. Mounting box; 32. Inner cavity; 33. Adjusting cylinder; 34. First guide slot; 35. Second guide slot; 36. Slot; 361. Locking block; 362. First electric... 37. Push rod; 38. First exhaust pipe; 4. Second exhaust pipe; 5. Collection mechanism; 6. Linkage rod; 7. Constraint groove; 8. First gear; 9. Second gear; 10. Synchronous belt; 11. Motor; 22. Second electric push rod; 33. Mating cavity; 44. Connecting air pipe; 5. Scraper; 6. First connecting rod; 7. Second connecting rod; 8. Guide cavity; 9. Exhaust hole; 10. Connecting groove. Detailed Implementation

[0034] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0035] Example: Figure 1 and Figure 2 As shown, an air-cooled flux collection device for a reflow oven includes a module box 1, which is a rectangular box with a hollow side. The module box 1 can be modularly installed to correspond to the heating module position inside the reflow oven. A movable plate 11 is snapped onto the side of the module box 1 and fixed to the side of the module box 1 with screws. The movable plate 11 is a rectangular plate. A condensation mechanism 2 for collecting flux is provided inside the module box 1. A flow guiding mechanism 3 for recovering waste heat is provided on the side of the condensation mechanism 2. A collection mechanism 4 that can be driven in multiple states and recover subsequent flux is provided inside the condensation mechanism 2.

[0036] The condensation mechanism 2 can recover the flux and can also be used to recover waste heat in conjunction with subsequent components.

[0037] like Figures 2 to 4As shown, the condensation mechanism 2 includes a collection plate 21 movably disposed inside the module box 1 and fixedly installed on the side of the movable plate 11. The collection plate 21 is a rectangular plate, and collection cavities 22 are equidistantly formed on the side of the collection plate 21. The collection cavities 22 are circular cavities. An air inlet groove 211 is formed on the side of the collection plate 21, penetrating into all the collection cavities 22. The air inlet groove 211 is a circular groove. A first air inlet pipe 23 is fixedly installed through the side of the module box 1 and is snapped into the air inlet groove 21. 1. Internally, one end of the first air inlet pipe 23 is connected to the flux vapor collection point at the heating module of the reflow oven. The first air inlet pipe 23 is a circular pipe. Inside the module box 1, an inner cylinder 25 is equidistantly arranged at the position corresponding to the collection chamber 22, and the inner cylinder 25 is attached to the side of the collection plate 21. The inner cylinder 25 is a hollow funnel-shaped cylinder. Temperature-conducting plates 26 are fixedly installed at equal intervals on the side of the inner cylinder 25. The temperature-conducting plates 26 are finned plates of heat-conducting material. An outer cylinder 24 is fixedly installed on the side of the inner cylinder 25, and the outer cylinder 24 covers the temperature-conducting plates 21. 6. The outer cylinder 24 is a C-shaped cylinder with a cover. Second air inlet pipes 241 are fixedly installed at equal intervals along the side of the outer cylinder 24, passing through both the outer cylinder 24 and the module box 1, connecting the interior of all outer cylinders 24. One end of the second air inlet pipe 241 is connected to the circulating gas collection point of the reflow oven cooling module. Specifically, flux vapor flows from the collection chamber 22 to the inner cylinder 25 through the first air inlet pipe 23 via the air inlet groove 211. The inner cylinder 25 gradually contracts, and the vapor contacts the... The inner cylinder 25 is cooled and condenses into liquid. The flux liquid flows from the side of the inner cylinder 25 into the collection chamber 22 for collection. The cold air from the synchronous cooling module flows into the outer cylinder 24 from the second air inlet pipe 241. With the flow of subsequent components, the heat on the side of the inner cylinder 25 can be removed through the heat conduction plate 26, which improves the cooling of the steam. Later, the collection plate 21 can be pulled out of the module box 1 by pulling the movable plate 11. During installation, the first air inlet pipe 23 is inserted into the air inlet groove 211 to position and constrain the collection plate 21.

[0038] The waste heat of flux vapor can be reused through the flow guiding mechanism 3, and it can be used in multiple states.

[0039] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the flow guiding mechanism 3 includes a mounting box 31 fixedly installed on the top side inside the module box 1, and the mounting box 31 is fixedly connected to the upper side of the inner cylinder 25 and the outer cylinder 24. The mounting box 31 is a rectangular box, and an inner cavity 32 is opened on the lower side of the mounting box 31, with the inner cavity 32 corresponding to the positions of the outer cylinder 24 and the inner cylinder 25. The inner cavity 32 is a cylindrical cavity with a convex cross-section. An adjusting cylinder 33 is movably installed inside the inner cavity 32, and the side of the adjusting cylinder 33 maintains a certain distance from the wall of the inner cavity 32. The adjusting cylinder 33 is a cylinder with an "F" shaped cross-section, and the side of the adjusting cylinder 33 corresponds to the inner cavity. A first guide groove 34, which penetrates the first protrusion and the outer cylinder 24, is mirror-imagely formed at the position of the first protrusion 32. The first guide groove 34 is an "L"-shaped circular groove. A second guide groove 35, which penetrates the second protrusion of the inner cavity 32, is mirror-imagely formed on the side of the adjusting cylinder 33 and corresponds to the position of the inner cylinder 25. The second guide groove 35 is an "L"-shaped circular groove. A slot 36, which is rectangular, is formed on the inner side of the adjusting cylinder 33. A locking block 361 is movably installed inside the slot 36. The locking block 361 is a wear-resistant rectangular block with one side arc-shaped. A first electric push rod 362 is symmetrically fixed between the side of the mounting box 31 and the wall of the slot 36. A first exhaust pipe 37 and a second exhaust pipe 38 are staggered on the side of the mounting box 31, with the ports of the first exhaust pipe 37 and the second exhaust pipe 38 respectively penetrating the mounting box 31 to two protrusions in the inner cavity 32, corresponding to the outlet positions of the first exhaust pipe 37 and the first guide groove 34. The outlet ports of the first exhaust pipe 37 and the second exhaust pipe 38 are finally connected in parallel to enter the furnace. The first exhaust pipe 37 and the second exhaust pipe 38 are multi-circular pipes. Specifically, the push rod 362 is pushed through the slot 36. When the moving block 361 cooperates with the later components, it can drive the regulating cylinder 33 to rotate inside the inner cavity 32. In the default state, the first exhaust pipe 37 is connected to the inside of the outer cylinder 24. The flux vapor is condensed and collected inside the inner cylinder 25 and flows through the second guide groove 35 and is discharged from the second exhaust pipe 38. The cold air passes through the inside of the outer cylinder 24 and carries away the heat from the side of the heat-conducting plate 26. Then it passes through the first guide groove 34 and is discharged from the first exhaust pipe 37. Finally, the heat-carrying flow and the recovered steam are combined to form warm gas that flows back into the furnace, making full use of the heat of the gas.

[0040] The set collection mechanism 4 can trigger each component and collect flux in multiple states, which also facilitates the subsequent removal of flux.

[0041] like Figure 2 , Figure 3 and Figures 6 to 8As shown, the collection mechanism 4 includes a linkage rod 41 disposed inside the inner cylinder 25, and the linkage rod 41 extends out through the adjustment cylinder 33 and the installation box 31 and penetrates the module box 1. The linkage rod 41 is a "T"-shaped round rod. A constraint groove 411 is formed in the side surface of the linkage rod 41 corresponding to the upper position of the module box 1. The constraint groove 411 is a spline groove. A first gear 42 is movably sleeved on the side surface of the linkage rod 41, and the first gear 42 is meshed and installed inside the constraint groove 411. The first gear 42 is an annular gear with an inner spline shape. A synchronous belt 422 is meshed and sleeved on the side surface of the first gear 42. The synchronous belt 422 is an "O"-shaped belt with teeth on the inner side. A second gear 421 is disposed on the upper side of the module box 1 and is disposed inside the synchronous belt 422 and meshed with it. The synchronous belt 422 is a circular gear. A motor 423 is fixedly installed on the upper side of the synchronous belt 422, and the motor 423 is fixed on the upper side of the module box 1 through a support frame. A second electric push rod 43 is disposed on the upper side of the linkage rod 41, and the second electric push rod 43 is fixed on the upper side of the module box 1 through a support frame. A mating cavity 431 is formed at the output end of the second electric push rod 43, and the linkage rod 41 is rotatably installed inside the mating cavity 431. The mating cavity 431 is a cylindrical groove with a cross-section in the shape of a Chinese character "tu". A connecting air pipe 44 is fixedly disposed on the wall surface of the mating cavity 431, and the connecting air pipe 44 penetrates the mating cavity 431. The other end of the connecting air pipe 44 is fixedly connected to the parallel connection of the first exhaust pipe 37 and the second exhaust pipe 38 and is equipped with an electric control valve (a general three-way valve can be used). By default, the electric control valve makes the connecting air pipe 44 in a non-connected state, and the warm gas of the first exhaust pipe 37 and the second exhaust pipe 38 flows into the furnace; specifically, by driving the second gear 421 to mesh with the synchronous belt 422 by the motor 423 to make it rotate, the synchronous belt 422 can drive all the first gears 42 to rotate synchronously with it, and the first gear 42 can drive the linkage rod 41 to perform an overall rotational movement. By pushing with the provided second electric push rod 43, the linkage rod 41 can be driven to perform a lifting movement inside the inner cylinder 25. The rotation of the linkage rod 41 inside the mating cavity 431 is restricted. In this way, all the linkage rods 41 can be driven to rotate by a single motor 423, reducing the energy consumption during the use of the device;

[0042] Scraper blades 45 are equidistantly fitted to the inner side of the inner cylinder 25. The scraper blades 45 are folded plates. A first connecting rod 451 and a second connecting rod 452 are fixedly installed on both sides of the scraper blades 45 and are also fixedly connected to the side of the linkage rod 41. The scraper blades 45, the first connecting rods 451 and the second connecting rods 452 are all made of heat-conducting material. A flow guiding cavity 453 is formed inside the scraper blades 45. The flow guiding cavity 453 is a folded groove. Through-holes are equidistantly formed on the two walls of the flow guiding cavity 453. The exhaust hole 454 of the scraper 45 is a circular hole. A connecting groove 46 is provided on the upper side of the linkage rod 41, and the connecting groove 46 passes through the first connecting rod 451 and the second connecting rod 452 to the inside of the guide cavity 453. The connecting groove 46 is a multi-cylinder groove. Specifically, by default, the rotation of the linkage rod 41 drives the scraper 45 to rotate, which can perform scraping and cleaning operation on the inner side of the inner cylinder 25. When the second electric push rod 43 pushes the scraper 45 downward, the scraper 45... 5 will detach from the inner cylinder 25 and reach the wall of the collection chamber 22, and the first connecting rod 451 will contact the bottom wall of the collection chamber 22. At this time, the linkage rod 41 rotates, driving the scraper 45 and the first connecting rod 451 to scrape the wall of the collection chamber 22, breaking up the clumps of flux collected inside, so that the flux can be easily poured out when the collection plate 21 is pulled out. The above is connected to the gas pipe 44 through the electric control valve, so that the warm gas from the first exhaust pipe 37 and the second exhaust pipe 38 can flow back to the inside of the connecting groove 46, and be discharged from the connecting groove 46 to the inside of the guide chamber 453 and discharged from the exhaust hole 454, so that the warm gas can be recycled to maximize the recovery of flux. Alternatively, the warm gas can heat the scraper 45, the first connecting rod 451 and the second connecting rod 452, so that the flux accumulated on the side melts and flows into the inside of the collection chamber 22. In addition, the heated outer cylinder 24 and inner cylinder 25 module box 1 can also more easily scrape the flux on the wall of the collection chamber 22.

[0043] Working principle:

[0044] During normal recycling: When the reflow oven is in use, the flux at the heating module is heated into a vapor state. The vapor is collected and discharged from the first air inlet pipe 23 through the air inlet groove 211 to the inside of each collection chamber 22. Then, the inner cylinder 25 gradually contracts and guides the vapor to cool down and condense into liquid on its side, which flows into the bottom of the collection chamber 22 for collection. The condensed vapor then passes through the second guide groove 35 to the second exhaust pipe 38 for discharge.

[0045] Meanwhile, the cold air from the cold air module is collected and discharged into the interior of each outer cylinder 24 through the second air inlet pipe 241. The cold air carries away the heat from the side of the temperature guide plate 26 and absorbs the temperature from the inside of the inner cylinder 25 through the temperature guide plate 26 to cool it down, ensuring the condensation effect of the steam on its side. Then, the cold air that has carried away the heat passes through the first guide groove 34 to the first exhaust pipe 37 and is discharged. The cold air and steam are connected in parallel through the first exhaust pipe 37 and the second exhaust pipe 38 and then converge to form warm gas and discharge it back into the furnace. This effectively keeps the recovered gas at a certain temperature and reduces the energy consumption of reheating.

[0046] At the same time, the second electric push rod 43 pulls the linkage rod 41 so that the scraper 45 fits against the inner side of the inner cylinder 25. The motor 423 drives the second gear 421 to rotate and mesh with the synchronous belt 422, which drives the linkage rod 41 to rotate. The linkage rod 41 drives the scraper 45 to rotate on the side of the inner cylinder 25, scraping the condensed flux and quickly dropping it to the bottom of the collection chamber 22 for collection.

[0047] When the recovery rate is low: When the external sensor detects that the flux content inside the warm gas is still high, the electric control valve connects the connecting gas pipe 44 to the junction of the first exhaust pipe 37 and the second exhaust pipe 38. The warm gas generated by the junction is discharged from the connecting gas pipe 44 into the mating cavity 431, and then flows into the guide cavity 453 through the connecting groove 46 and is discharged from the exhaust hole 454. At this time, the warm gas comes into contact with the inner side of the inner cylinder 25 again to condense the residual flux. At the same time, the warm gas heats the first connecting rod 451, the second connecting rod 452 and the scraper 45, so that the scraper 45 generates a little heat and can better scrape the flux on the side of the inner cylinder 25 until the flux content inside the warm gas reaches the standard and the normal state is restored.

[0048] After recycling: At this time, the first electric push rod 362 pushes the locking block 361 to fit against the side of the linkage rod 41. When the linkage rod 41 rotates, it will drive the adjusting cylinder 33 to rotate a certain position inside the inner cavity 32. Then, the first electric push rod 362 pulls the locking block 361 away from the side of the linkage rod 41. The position of the first guide groove 34 is intersected with the outer cylinder 24. At this time, the inside of the outer cylinder 24 is not connected to the first guide groove 34. After the cold air absorbs the heat of the heat conduction plate 26, it accumulates inside the outer cylinder 24, so that the side of the inner cylinder 25 is no longer cooled, and a heat preservation effect is produced. At the same time, there is only uncondensed steam at the junction of the first exhaust pipe 37 and the second exhaust pipe 38. The connecting gas pipe 44 is connected through the electric control valve. The steam returns to the inside of the inner cylinder 25 from the connecting groove 46 and heats the side of the first connecting rod 451, the second connecting rod 452 and the guide cavity 453. At this time, the scraper 45 fits against the inside of the inner cylinder 25 and rotates to scrape and melt the residual flux, which flows into the bottom of the collection cavity 22.

[0049] Subsequently, the second electric actuator 43 pushes the linkage rod 41 downward, causing the scraper 45 to disengage from the inner cylinder 25 until the first connecting rod 451 reaches the bottom of the collection chamber 22. The heated scraper 45 and the first connecting rod 451 rotate on the side of the collection chamber 22 driven by the linkage rod 41, which scrapes and breaks up the flux on the side of the collection chamber 22, preventing the flux from sticking to the side and bottom of the collection chamber 22 after cooling. Then, the connecting air pipe 44 pulls the linkage rod 41 to reset and adhere to the side of the inner cylinder 25. This state is maintained for a certain period of time, so that the flux melts and flows into the bottom of the collection chamber 22 after the first connecting rod 451, the second connecting rod 452 and the scraper 45 are heated. After completion, the collection plate 21 is pulled out by the movable plate 11, and the flux inside the collection chamber 22 can be removed by tools for subsequent recycling.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An air-cooled flux collection device for a reflow oven, comprising a module box (1), a movable plate (11) snapped onto the side of the module box (1), a condensation mechanism (2) provided inside the module box (1), a flow guiding mechanism (3) provided on the side of the condensation mechanism (2), and a collection mechanism (4) provided inside the condensation mechanism (2). Its features are: The condensation mechanism (2) includes a collection plate (21), a collection cavity (22) is provided on the side of the collection plate (21), an inner cylinder (25) is provided at equal intervals inside the module box (1) corresponding to the position of the collection cavity (22), a temperature guiding plate (26) is fixedly installed at equal intervals on the side of the inner cylinder (25), and an outer cylinder (24) is fixedly installed on the side of the inner cylinder (25). The flow guiding mechanism (3) includes a mounting box (31), an inner cavity (32) is opened on the lower side of the mounting box (31), an adjusting cylinder (33) is movably installed inside the inner cavity (32), a first guide groove (34) and a second guide groove (35) are opened on the side of the adjusting cylinder (33), a locking block (361) and a first electric push rod (362) are provided on the inner side of the adjusting cylinder (33), and a first exhaust pipe (37) and a second exhaust pipe (38) are respectively staggered on the side of the mounting box (31); The collecting mechanism (4) includes a linkage rod (41), a first gear (42), a second gear (421) and a motor (423) are provided on the side of the linkage rod (41), a second electric push rod (43) is provided on the upper side of the linkage rod (41), and a scraper (45), a first connecting rod (451) and a second connecting rod (452) are provided on the side of the linkage rod (41) corresponding to the inner side of the inner cylinder (25).

2. The air-cooled flux collection device for a reflow oven according to claim 1, characterized in that: The collecting plate (21) is movably disposed inside the module box (1) and is fixedly installed on the side of the movable plate (11). The side of the collecting plate (21) is provided with an air inlet groove (211) that extends through it to the inside of all the collecting chambers (22). The side of the module box (1) is fixedly installed with a first air inlet pipe (23) that is snapped into the inside of the air inlet groove (211).

3. The air-cooled flux collection device for a reflow oven according to claim 2, characterized in that: The inner cylinder (25) is attached to the side of the collecting plate (21), and the outer cylinder (24) covers the temperature-conducting plate (26). The side of the outer cylinder (24) is equidistantly fixed with a second air inlet pipe (241), and the second air inlet pipe (241) passes through the outer cylinder (24) and the module box (1) respectively, connecting the interior of all outer cylinders (24).

4. The air-cooled flux collection device for a reflow oven according to claim 3, characterized in that: The mounting box (31) is fixedly installed on the top side inside the module box (1) and is fixedly connected to the upper side of the inner cylinder (25) and the outer cylinder (24). The inner cavity (32) corresponds to the position of the outer cylinder (24) and the inner cylinder (25). The side of the adjusting cylinder (33) maintains a distance from the wall of the inner cavity (32). The first guide groove (34) is opened on the side of the adjusting cylinder (33) corresponding to the first protrusion of the inner cavity (32). The second guide groove (35) is opened on the side of the adjusting cylinder (33) corresponding to the second protrusion of the inner cavity (32).

5. The air-cooled flux collection device for a reflow oven according to claim 4, characterized in that: The inner side of the regulating cylinder (33) is provided with a slot (36), the locking block (361) is movably installed inside the slot (36), the first electric push rod (362) is fixedly set between the side of the locking block (361) and the wall of the slot (36), and the ports of the first exhaust pipe (37) and the second exhaust pipe (38) respectively penetrate through the mounting box (31) to two protrusions in the inner cavity (32) and correspond to the air outlet positions of the first exhaust pipe (37) and the first guide groove (34).

6. The air-cooled flux collection device for a reflow oven according to claim 5, characterized in that: The linkage rod (41) is located inside the inner cylinder (25). A constraint groove (411) is provided on the side of the linkage rod (41). The first gear (42) is movably sleeved on the side of the linkage rod (41) and meshed inside the constraint groove (411). A synchronous belt (422) is meshed on the side of the first gear (42). The second gear (421) is located on the upper side of the module box (1) and meshes inside the synchronous belt (422). The motor (423) is fixedly installed on the upper side of the synchronous belt (422).

7. A gas-cooled flux collection device for a reflow oven according to claim 6, characterized in that: The output end of the second electric actuator (43) is provided with a mating cavity (431) and the linkage rod (41) is rotatably installed inside the mating cavity (431). A connecting air pipe (44) is fixedly provided on the wall of the mating cavity (431) and the connecting air pipe (44) passes through the mating cavity (431).

8. A gas-cooled flux collection device for a reflow oven according to claim 7, characterized in that: The scraper (45) is fitted to the inner side of the inner cylinder (25). The first connecting rod (451) and the second connecting rod (452) are fixedly installed on both sides of the scraper (45) and are also fixedly connected to the side of the linkage rod (41). The scraper (45) has a flow guide cavity (453) inside. The two walls of the flow guide cavity (453) have exhaust holes (454) at equal intervals. The upper side of the linkage rod (41) has a connecting groove (46) that passes through the first connecting rod (451) and the second connecting rod (452) to the inside of the flow guide cavity (453).

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