A flux recovery device and method

Abstract

The application discloses a kind of flux recovery device and method, device includes: reaction mechanism, recovery pipeline, heating mechanism, filtering mechanism, circulation pipeline;The working cavity is equipped in the reaction mechanism, and the heating mechanism is installed in the working cavity;The air inlet end of the recovery pipeline is used to connect the exhaust port of welding furnace, and the exhaust end of the recovery pipeline is communicated with the working cavity;The filtering inlet of the filtering mechanism is communicated with the working cavity, and the filtering outlet of the filtering mechanism is communicated with the air inlet end of the circulation pipeline, and the exhaust end of the circulation pipeline is used to access the air inlet of welding furnace.The application builds the integrated recovery structure of welding furnace flux waste gas collection, heating cracking, filtering purification, closed loop circulation, can effectively capture and recycle the effective component of flux in waste gas and recycle, improves the environmental protection and resource utilization of welding production.

Description

Technical Field

[0001] This invention relates to the field of welding waste gas resource recovery and utilization technology, and in particular to a flux recovery device and method. Background Technology

[0002] During circuit board soldering operations, the soldering furnace continuously emits mixed waste gas containing effective flux components. Existing conventional waste gas treatment equipment only has simple waste gas purification and emission functions and lacks a closed-loop flux recovery and recycling structure, making it impossible to capture, recover, and reuse the effective flux components in the waste gas. This treatment method results in a large amount of recyclable flux components being directly emitted with the waste gas, causing a significant waste of flux resources, increasing material costs in circuit board soldering production, and causing industrial waste gas pollution. Currently, the industry lacks a dedicated device that can achieve closed-loop recovery of soldering furnace flux waste gas. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing methods that cannot recover the effective components of flux in welding furnace exhaust gas, and to provide a flux recovery device and method.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a flux recovery device, comprising: a reaction mechanism, a recovery pipeline, a heating mechanism, a filtration mechanism, and a circulation pipeline; The reaction mechanism is provided with a working chamber, and the heating mechanism is installed in the working chamber; the air inlet of the recovery pipe is used to connect to the exhaust port of the welding furnace, and the exhaust port of the recovery pipe is connected to the working chamber; the filter inlet of the filter mechanism is connected to the working chamber, the filter outlet of the filter mechanism is connected to the air inlet of the circulation pipe, and the exhaust port of the circulation pipe is used to connect to the air inlet of the welding furnace.

[0005] Furthermore, the working chamber includes a heating chamber and a reaction chamber connected to the heating chamber; the heating mechanism is installed in the heating chamber; the exhaust end of the recovery pipe is connected to the heating chamber; and the filter inlet of the filter mechanism is connected to the reaction chamber.

[0006] Furthermore, the reaction mechanism includes a first cylinder, and the heating chamber is disposed within the first cylinder; the first cylinder has a first opening and a second opening at opposite ends, the first opening communicating with the reaction chamber; the heating mechanism includes a connecting plate and a heating component; the connecting plate is connected to the end of the first cylinder with the second opening and seals the second opening; the heating component is connected to the connecting plate and extends into the heating chamber through the second opening; the exhaust end of the recovery pipe is connected to the first cylinder and disposed near the second opening.

[0007] Furthermore, the heating component includes a plurality of heating elements and a temperature probe, wherein both the temperature probe and the heating elements extend from the second opening toward the first opening, and the plurality of heating elements are arranged around the temperature probe.

[0008] Furthermore, the reaction mechanism also includes a second cylinder, and the reaction chamber is disposed within the second cylinder; the first cylinder is connected to the second cylinder, and the first opening communicates with the reaction chamber.

[0009] Furthermore, the second cylinder has a first connecting part and a second connecting part at opposite ends, the first cylinder is connected to the first connecting part, and the filter mechanism is connected to the second connecting part and communicates with the reaction chamber.

[0010] Furthermore, the filtration mechanism includes a third cylinder, a first filter screen, and a second filter screen. The third cylinder is connected to the second connecting part. The first filter screen and the second filter screen are respectively installed at opposite ends of the third cylinder. The first filter screen forms the filtration inlet of the filtration mechanism, and the second filter screen forms the filtration outlet of the filtration mechanism.

[0011] Furthermore, the first cylindrical body extends partially into the second cylindrical body, and the third cylindrical body extends at least partially into the second cylindrical body, with the first cylindrical body and the third cylindrical body extending towards each other; the filtration mechanism also includes a fourth cylindrical body, which is located within the third cylindrical body, and the extension direction of the fourth cylindrical body is consistent with the extension direction of the third cylindrical body; the end of the fourth cylindrical body near the second cylindrical body is open, and the end of the fourth cylindrical body near the second filter screen is closed; the end of the first cylindrical body with a first outlet extends into the fourth cylindrical body from the open end of the fourth cylindrical body, and there is an airflow buffer space between the first cylindrical body and the fourth cylindrical body, the airflow buffer space being connected to the first outlet and the reaction chamber; the first filter screen is annular, with its inner edge connected to the open end of the fourth cylindrical body, and its outer edge connected to the third cylindrical body.

[0012] In one embodiment, an insulated box is also included, and both the reaction mechanism and the filtration mechanism are installed inside the insulated box.

[0013] This invention also provides a flux recovery method, performed using the flux recovery device described above, the method comprising: A recovery pipeline is used to collect the flux mixture gas discharged from the welding furnace and discharge the flux mixture gas into the working chamber; A heating device is used to heat the flux mixture gas so that the flux mixture gas reaches the reaction temperature and produces a cracking reaction, resulting in a treated mixture gas; The treated mixed gas is filtered using a filtration mechanism to obtain clean gas. The filtered clean gas is discharged into the welding furnace through a circulating pipeline.

[0014] The flux recovery device and method provided by this invention have the following advantages compared with the prior art: they establish an integrated recovery structure for collecting, heating and cracking, filtering and purifying, and circulating flux exhaust gas from welding furnaces. This structure can effectively capture and recover the effective components of flux in the exhaust gas and reuse them, changing the traditional direct emission treatment method. This effectively reduces the waste of flux resources, lowers the material cost of welding production, and reduces the environmental pollution caused by direct emission of exhaust gas, thereby improving the environmental friendliness and resource utilization rate of welding production.

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the flux recovery device provided in an embodiment of the present invention; Figure 2 This is a first cross-sectional schematic diagram of the flux recovery device provided in an embodiment of the present invention; Figure 3 This is a second cross-sectional schematic diagram of the flux recovery device provided in an embodiment of the present invention; Figure 4 This is a third cross-sectional schematic diagram of the flux recovery device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the heating mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic flowchart of the flux recovery method provided in an embodiment of the present invention.

[0018] Figure Labels 1. Reaction mechanism; 11. First cylinder; 111. Heating chamber; 12. Second cylinder; 121. Reaction chamber; 122. First connecting part; 123. Second connecting part; 124. Collection chamber; 2. Recovery pipe; 3. Heating mechanism; 31. Connecting plate; 32. Heating component; 321. Heating element; 322. Support pipe; 323. Hollowed-out bracket; 4. Filtering mechanism; 41. Third cylinder; 42. First filter screen; 43. Second filter screen; 44. Fourth cylinder; 441. Airflow buffer space; 5. Circulation pipe; 51. Main air intake channel; 52. Secondary air intake channel; 53. Acceleration channel; 54. Air outlet channel; 6. Insulation box. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present 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," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0026] See Figures 1 to 5 As shown, an embodiment of the present invention provides a flux recovery device, including: a reaction mechanism 1, a recovery pipeline 2, a heating mechanism 3, a filtration mechanism 4, and a circulation pipeline 5; The reaction mechanism 1 is provided with a working chamber, and the heating mechanism 3 is installed in the working chamber; the air inlet of the recovery pipe 2 is used to connect to the exhaust port of the welding furnace, and the exhaust port of the recovery pipe 2 is connected to the working chamber; the filter inlet of the filter mechanism 4 is connected to the working chamber, the filter outlet of the filter mechanism 4 is connected to the air inlet of the circulation pipe 5, and the exhaust port of the circulation pipe 5 is used to connect to the air inlet of the welding furnace.

[0027] Specifically, in this embodiment, the recovery pipe 2 is directly connected to the exhaust port of the welding furnace to collect the mixed waste gas containing flux components generated during welding operations in real time, and introduce the waste gas into the working chamber of the reaction mechanism 1. The mixed waste gas is heated by the heating mechanism 3 built into the working chamber, which causes the flux components in the waste gas to undergo a decomposition reaction. The mixed gas after the reaction is then purified by the filtration mechanism 4, and finally the treated clean gas is returned to the welding furnace through the circulation pipe 5, forming a complete waste gas recovery and circulation path.

[0028] This embodiment establishes an integrated recycling structure for collecting, heating and pyrolyzing, filtering and purifying, and circulating flux exhaust gas from welding furnaces. It can effectively capture and recover the effective components of flux in the exhaust gas and reuse them, completely changing the traditional direct emission treatment method. This effectively reduces flux resource waste, lowers welding production material costs, and reduces environmental pollution caused by direct exhaust gas emissions, thereby improving the environmental friendliness and resource utilization rate of welding production.

[0029] Furthermore, the flux recovery device also includes an insulation box 6, in which the reaction mechanism 1 and the filtration mechanism 4 are both installed.

[0030] Specifically, in this embodiment, the heat preservation performance of the heat preservation box 6 is used to completely enclose the core operating reaction mechanism 1 and the filtration mechanism 4 of the device, locking in the heat inside the cavity from all directions. This reduces the heat loss from the heating chamber 111 and the reaction chamber 121, maintains a constant temperature in the operating area, and ensures stable temperature conditions for the flux decomposition reaction.

[0031] Furthermore, the working chamber includes a heating chamber 111 and a reaction chamber 121 connected to the heating chamber 111; the heating mechanism 3 is installed in the heating chamber 111; the exhaust end of the recovery pipe 2 is connected to the heating chamber 111; and the filter inlet of the filter mechanism 4 is connected to the reaction chamber 121.

[0032] Specifically, in this embodiment, the working chamber is divided into two independent functional areas: a heating chamber 111 and a reaction chamber 121, which are interconnected, to achieve separate operation of the waste gas heating and component reaction processes. The mixed waste gas discharged from the welding furnace first enters the heating chamber 111 through the recovery pipe 2, where the heating mechanism 3 completes the dedicated heating operation. The heated waste gas automatically flows into the interconnected reaction chamber 121 to complete the flux component decomposition reaction. The gas after the reaction is completed is then connected to the filtration mechanism 4 for purification treatment.

[0033] This embodiment avoids interference between the exhaust gas heating process and the pyrolysis reaction process by functionally partitioning the working chamber, ensuring that the mixed exhaust gas can be fully heated to the temperature required for the pyrolysis reaction, effectively improving the sufficiency of the flux component pyrolysis reaction, preventing the problem of low recovery efficiency caused by the direct reaction of insufficiently heated exhaust gas, and further improving the integrity and operational stability of flux recovery.

[0034] Further, the reaction mechanism 1 includes a first cylinder 11, and the heating chamber 111 is disposed inside the first cylinder 11; the first cylinder 11 has a first opening and a second opening at opposite ends, the first opening is connected to the reaction chamber 121, the heating mechanism 3 includes a connecting plate 31 and a heating component 32, the connecting plate 31 is connected to the end of the first cylinder 11 with the second opening and seals the second opening, the heating component 32 is connected to the connecting plate 31 and extends into the heating chamber 111 through the second opening; the exhaust end of the recovery pipe 2 is connected to the first cylinder 11 and disposed near the second opening.

[0035] Specifically, in this embodiment, a closed heating chamber 111 is formed by the first cylinder 11, and the second opening of the first cylinder 11 is sealed by the connecting plate 31 to ensure the airtightness of the heating chamber 111. The heating component 32 is fixed by the connecting plate 31 and extends into the heating chamber 111, which can uniformly heat the mixed waste gas in the chamber. The arrangement of the recovery pipe 2 close to the second opening allows the waste gas to flow directionally from the end where the second opening is located to the first opening, effectively prolonging the circulation and residence time of the mixed waste gas in the heating chamber 111, so as to achieve full heating of the waste gas and ensure the heating effect.

[0036] Furthermore, the heating component 32 includes a plurality of heating elements 321 and a temperature probe (not shown in the figure). Both the temperature probe and the heating elements 321 extend from the second opening toward the first opening, and the plurality of heating elements 321 are arranged around the temperature probe.

[0037] Specifically, this embodiment employs a layout of multiple heating elements 321 surrounding a temperature probe, allowing the heating elements 321 to heat the mixed waste gas inside the heating chamber 111 from multiple circumferential directions. The temperature probe collects the ambient temperature inside the chamber in real time, accurately feeding back the waste gas heating temperature value. Operators can adjust the working state of the heating elements 321 based on the temperature data, ensuring that the temperature inside the heating chamber 111 matches the requirements of the pyrolysis reaction.

[0038] In one embodiment, the heating element 321 is a heating tube, the connecting plate 31 is connected to a support tube 322, the support tube 322 extends from the second opening toward the first opening, the temperature probe is inserted into the support tube 322, and the first cylinder 11 is provided with a plurality of hollow brackets 323, the hollow brackets 323 are used to support the support tube 322 and the heating tube.

[0039] Specifically, the support tube 322 structure can protect and accurately position the temperature probe, preventing it from shifting or shaking due to airflow impact, thus ensuring temperature detection accuracy. The hollow bracket 323 can effectively improve the structural stability of the heating tube and the support tube 322, preventing component deformation and displacement caused by long-term high-temperature operation and airflow erosion, extending the service life of the heating mechanism 3. At the same time, the hollow and transparent structure will not obstruct gas flow and heat transfer, continuously ensuring the heating uniformity and operational stability of the heating chamber 111.

[0040] Furthermore, the reaction mechanism 1 also includes a second cylinder 12, and the reaction chamber 121 is disposed inside the second cylinder 12; the first cylinder 11 is connected to the second cylinder 12, and the first opening communicates with the reaction chamber 121.

[0041] Specifically, the reaction mechanism 1 is equipped with an independent second cylinder 12, within which a reaction chamber 121 is formed. The first cylinder 11 is directly connected to the second cylinder 12, allowing the first opening at the end of the first cylinder 11 to communicate with the reaction chamber 121 inside the second cylinder 12. The flux mixture waste gas, after being fully heated by the heating chamber 111 inside the first cylinder 11, can be directly introduced into the reaction chamber 121 inside the second cylinder 12 through the first opening. The flux components undergo a cracking reaction within this independent, sealed chamber, achieving chamber separation between the heating and cracking reaction processes. This effectively avoids the adverse effects of temperature fluctuations and airflow disturbances during the heating process on the cracking reaction. The independent second cylinder 12 provides a stable and sealed reaction space for the flux cracking reaction, ensuring the cracking reaction of the mixed waste gas proceeds fully and uniformly, improving the recovery and conversion rate of the effective flux components. Simultaneously, the split structure simplifies equipment assembly, disassembly, and subsequent maintenance.

[0042] Furthermore, the second cylinder 12 has a first connecting part 122 and a second connecting part 123 at opposite ends, the first cylinder 11 is connected to the first connecting part 122 and communicates with the reaction chamber 121, and the filter mechanism 4 is connected to the second connecting part 123 and communicates with the reaction chamber 121.

[0043] Specifically, in this embodiment, a first connecting part 122 and a second connecting part 123 are respectively provided at both ends of the second cylinder 12, forming a dedicated docking installation structure at both ends. The first cylinder 11 is docked with the first connecting part 122 to stably introduce the heated mixed waste gas into the reaction chamber 121, and the filter mechanism 4 is docked with the second connecting part 123 to directionally export the mixed gas after the reaction is completed. The partitioned docking structure at both ends standardizes the unidirectional flow path of the gas, forming an orderly operation process of heating, pyrolysis reaction, and filtration purification.

[0044] Furthermore, the filtration mechanism 4 includes a third cylinder 41, a first filter screen 42, and a second filter screen 43. The third cylinder 41 is connected to the second connecting part 123. The first filter screen 42 and the second filter screen 43 are respectively installed at opposite ends of the third cylinder 41. The first filter screen 42 forms the filtration inlet of the filtration mechanism 4, and the second filter screen 43 forms the filtration outlet of the filtration mechanism 4.

[0045] Specifically, in this embodiment, the third cylinder 41 is used as the filter carrier, and a first filter screen 42 and a second filter screen 43 are respectively arranged at both ends of the cylinder to form a double-layer graded filtration structure. The mixed gas after the reaction first passes through the first filter screen 42 for preliminary impurity removal, and then passes through the second filter screen 43 for fine filtration, removing residual reaction impurities and particulate matter in the gas step by step, thereby significantly improving the purification accuracy of the mixed gas, effectively removing impurities and debris in the gas after the pyrolysis reaction, ensuring the cleanliness of the gas returned to the welding furnace, preventing impurities from entering the welding furnace and affecting the welding quality, and preventing pipeline blockage, thus extending the service life of the equipment.

[0046] Further, the first cylinder 11 partially extends into the second cylinder 12, and the third cylinder 41 at least partially extends into the second cylinder 12, with the first cylinder 11 and the third cylinder 41 extending towards each other; the filter mechanism 4 also includes a fourth cylinder 44, which is located inside the third cylinder 41, and the extending direction of the fourth cylinder 44 is consistent with the extending direction of the third cylinder 41; the end of the fourth cylinder 44 near the second cylinder 12 is open, and the end of the fourth cylinder 44 near the second cylinder 12 is open. One end of the second filter screen 43 is closed. The first cylinder 11, with a first outlet, extends into the fourth cylinder 44 from the open end of the fourth cylinder 44, and there is an airflow buffer space 441 between it and the fourth cylinder 44. The airflow buffer space 441 is connected to the first outlet and the reaction chamber 121. The first filter screen 42 is annular. The inner edge of the first filter screen 42 is connected to the open end of the fourth cylinder 44, and the outer edge of the first filter screen 42 is connected to the third cylinder 41.

[0047] Specifically, the first cylinder 11 extends partially into the second cylinder 12, and the third cylinder 41 extends at least partially into the second cylinder 12, with both extending towards each other. Through the multi-cylinder nested integrated assembly structure, the core functional structures of heating, reaction, and filtration are concentrated inside the second cylinder 12, effectively reducing the overall axial space occupied by the device, significantly improving the integration of the equipment structure, and ensuring the airflow connection accuracy of each functional structure, avoiding airflow turbulence caused by misalignment of pipeline connections. On this basis, the end of the first cylinder 11 with the first outlet extends into the fourth cylinder 44 from the open end, further embedding and integrating the multi-level functional structures. While continuously reducing the equipment installation space, it transforms the originally straight airflow path into a bent direction, changing the straight-flow transmission mode of the gas. Finally, an airflow buffer space 441 is formed between the first cylinder 11 and the fourth cylinder 44. This space relies on a tortuous airflow path to further extend the overall residence time of the gas in the airflow buffer space 441 and the reaction chamber 121, allowing the residual flux components to fully complete the secondary reaction and sedimentation separation. At the same time, it stabilizes and decelerates the high-speed airflow, and guides the flow evenly to ensure that the subsequent filtration process is carried out smoothly and efficiently.

[0048] In another embodiment, when the filter mechanism 4 is integrally disposed inside the second cylinder 12, the third cylinder 41 can eliminate the independent docking assembly structure and be directly formed by one end of the second cylinder 12 having the second connecting part 123, so that the third cylinder 41 and the second cylinder 12 are an integrated structure.

[0049] Furthermore, a collecting chamber 124 is provided between the second filter screen 43 and the air inlet end of the circulation pipe 5, and the air inlet end of the circulation pipe 5 is connected to the collecting chamber 124.

[0050] Specifically, the collecting cavity 124 can be independently installed inside the insulation box 6. When the filter mechanism 4 is installed entirely inside the second cylinder 12, it can also be directly installed inside the second cylinder 12. In this embodiment, the cavity space of the collecting cavity 124 is used to stabilize and homogenize the filtered gas, eliminating the instantaneous airflow pressure difference and flow velocity fluctuations generated during the filtration process. At the same time, two layout methods are used to adapt to different filter mechanism 4 installation structures: independent layout adapts to the split filter structure, and embedded layout adapts to the built-in filter structure of the second cylinder 12, ensuring that the airflow can smoothly transition under different assembly forms.

[0051] Furthermore, the circulation pipe 5 includes a main air intake channel 51, a secondary air intake channel 52, an acceleration channel 53, and an exhaust channel 54. The air intake end of the main air intake channel 51 is connected to the filter mechanism 4. The secondary air intake channel 52 is used to introduce nitrogen gas, and the exhaust end of the secondary air intake channel 52 and the exhaust end of the main air intake channel 51 are both connected to the air intake end of the acceleration channel 53. The exhaust end of the acceleration channel 53 is connected to the air intake end of the exhaust channel 54. The exhaust end of the exhaust channel 54 is used to connect to the air inlet of the welding furnace. The air intake ends of the secondary air intake channel 52, the acceleration channel 53, and the exhaust channel 54 are connected sequentially in a straight line.

[0052] Specifically, in this embodiment, the circulation pipe 5 is configured as a multi-channel combined structure. The main intake channel 51 is responsible for receiving the clean recovered gas output from the filter mechanism 4, while the auxiliary intake channel 52 is separately connected to high-purity nitrogen as an acceleration gas source. Utilizing the structural feature of the auxiliary intake channel 52, acceleration channel 53, and outlet channel 54 being arranged coaxially and linearly, high-speed nitrogen forms a high-speed airflow field within the acceleration channel 53. Through airflow coupling, the recovered gas output from the main intake channel 51 is synchronously accelerated, achieving uniform mixing and pressure stabilization and acceleration of the two gases within the acceleration channel 53. Finally, the gas is uniformly transported to the welding furnace through the outlet channel 54. It is understood that the acceleration channel 53 in this embodiment can adopt a Venturi contraction acceleration structure.

[0053] See Figure 6 As shown, this embodiment of the invention also provides a flux recovery method, which is performed using the flux recovery device described above. The method includes: S1. The flux mixture gas discharged from the welding furnace is collected by a recovery pipeline and discharged into the working chamber; S2. The flux mixture gas is heated by a heating mechanism to bring it to the reaction temperature and cause a cracking reaction, thus obtaining the treated mixture gas. S3. The treated mixed gas is filtered using a filtration mechanism to obtain clean gas. S4. Use a circulating pipeline to discharge the filtered clean gas into the welding furnace.

[0054] Specifically, this embodiment relies on the closed-loop structure of the device to realize the fully automatic recovery and treatment of flux waste gas from the welding furnace. First, the waste gas is collected in a closed manner, and then the flux components are decomposed by precise heating to separate the effective reusable components. After filtration and impurity removal, clean gas is obtained and finally returned to the welding furnace to realize the recycling and reuse of waste gas resources.

[0055] It is understood that the fluxes adaptable for recycling in this embodiment cover the mainstream categories of electronic soldering, mainly including rosin-based fluxes, modified rosin fluxes, organic acid-based halogen-free fluxes, and general-purpose synthetic resin fluxes, which can cover fluxes used in conventional soldering processes such as reflow soldering and wave soldering. Under the suitable high-temperature pyrolysis conditions provided in this embodiment, the mixed gas of various fluxes can undergo a controlled pyrolysis reaction to generate corresponding reactants. All pyrolysis reactants can be separated by a filtration mechanism to retain clean, recyclable effective components, which is suitable for the recycling and reuse requirements of soldering furnaces.

[0056] The above embodiments are preferred implementations of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A flux recovery device, characterized in that, include: Reaction mechanism, recovery pipeline, heating mechanism, filtration mechanism, circulation pipeline; The reaction mechanism is provided with a working chamber, and the heating mechanism is installed in the working chamber; the air inlet of the recovery pipe is used to connect to the exhaust port of the welding furnace, and the exhaust port of the recovery pipe is connected to the working chamber; the filter inlet of the filter mechanism is connected to the working chamber, the filter outlet of the filter mechanism is connected to the air inlet of the circulation pipe, and the exhaust port of the circulation pipe is used to connect to the air inlet of the welding furnace.

2. The flux recovery device according to claim 1, characterized in that, The working chamber includes a heating chamber and a reaction chamber connected to the heating chamber; the heating mechanism is installed in the heating chamber; the exhaust end of the recovery pipe is connected to the heating chamber; and the filter inlet of the filtration mechanism is connected to the reaction chamber.

3. The flux recovery device according to claim 2, characterized in that, The reaction mechanism includes a first cylinder, and the heating chamber is disposed within the first cylinder. The first cylinder has a first opening and a second opening at opposite ends. The first opening communicates with the reaction chamber. The heating mechanism includes a connecting plate and a heating component. The connecting plate is connected to the end of the first cylinder with the second opening and seals the second opening. The heating component is connected to the connecting plate and extends into the heating chamber through the second opening. The exhaust end of the recovery pipe is connected to the first cylinder and disposed near the second opening.

4. The flux recovery device according to claim 3, characterized in that, The heating component includes a plurality of heating elements and a temperature probe. Both the temperature probe and the heating elements extend from the second opening toward the first opening, and the plurality of heating elements are arranged around the temperature probe.

5. The flux recovery device according to claim 3, characterized in that, The reaction mechanism further includes a second cylinder, and the reaction chamber is disposed within the second cylinder; the first cylinder is connected to the second cylinder, and the first opening communicates with the reaction chamber.

6. The flux recovery device according to claim 5, characterized in that, The second cylinder has a first connecting part and a second connecting part at opposite ends. The first cylinder is connected to the first connecting part and communicates with the reaction chamber. The filter mechanism is connected to the second connecting part and communicates with the reaction chamber.

7. The flux recovery device according to claim 6, characterized in that, The filtration mechanism includes a third cylinder, a first filter screen, and a second filter screen. The third cylinder is connected to the second connecting part. The first filter screen and the second filter screen are respectively installed at opposite ends of the third cylinder. The first filter screen forms the filtration inlet of the filtration mechanism, and the second filter screen forms the filtration outlet of the filtration mechanism.

8. The flux recovery device according to claim 7, characterized in that, The first cylindrical body extends into the second cylindrical body, and the third cylindrical body extends into the second cylindrical body at least partially, with the first and third cylindrical bodies extending towards each other. The filtration mechanism also includes a fourth cylindrical body located within the third cylindrical body, and the extension direction of the fourth cylindrical body is consistent with that of the third cylindrical body. The end of the fourth cylindrical body near the second cylindrical body is open, and the end of the fourth cylindrical body near the second filter screen is closed. The end of the first cylindrical body with a first outlet extends into the fourth cylindrical body from the open end of the fourth cylindrical body, and there is an airflow buffer space between the first and fourth cylindrical bodies. The airflow buffer space is connected to the first outlet and the reaction chamber. The first filter screen is annular, with its inner edge connected to the open end of the fourth cylindrical body and its outer edge connected to the third cylindrical body.

9. The flux recovery device according to claim 1, characterized in that, It also includes an insulated box, in which both the reaction mechanism and the filtration mechanism are installed.

10. A method for recovering flux, characterized in that, The method is performed using the flux recovery apparatus according to any one of claims 1 to 9, the method comprising: A recovery pipeline is used to collect the flux mixture gas discharged from the welding furnace and discharge the flux mixture gas into the working chamber; A heating device is used to heat the flux mixture gas so that the flux mixture gas reaches the reaction temperature and produces a cracking reaction, resulting in a treated mixture gas; The treated mixed gas is filtered using a filtration mechanism to obtain clean gas. The filtered clean gas is discharged into the welding furnace through a circulating pipeline.

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