Exhaust structure and wave-soldering apparatus thereof

Abstract

The application discloses an exhaust structure and a wave-soldering device, and can be applied to the wave-soldering device. The exhaust structure comprises a flow-converging air inlet cover, a gas flow conveying pipe group and a connecting pipe fitting. The flow-converging air inlet cover is at least partially covered above an automatic conveying device, and the automatic conveying device is specifically a track of the wave-soldering device. The gas flow conveying pipe group is in communication with the flow-converging air inlet cover. The connecting pipe fitting is arranged between the gas flow conveying pipe group and the flow-converging air inlet cover and is arranged in an inclined mode. The mouth part of the automatic conveying device below the connecting pipe fitting is out of the projection range in the vertical direction. The exhaust structure reduces the probability that the granular tin beads and tin residues float upward along the hot air, fall again to the controller mainboard after meeting the inner wall of the exhaust structure and improves the normal operation of the controller mainboard function and the yield of the controller mainboard.

Description

Technical Field

[0001] This invention relates to the field of wave soldering technology, and in particular to an exhaust structure and wave soldering equipment thereof. Background Technology

[0002] In industrial production, wave soldering is used for the mass production of circuit boards assembled manually. When the circuit boards pass through the solder bath and fume hood, the wave soldering process generates a large amount of solder beads and dross. These residues on the circuit boards can cause short circuits in components, leading to motherboard failure, board explosion, and other quality risks such as after-sales problems. Therefore, reducing solder beads and dross in wave soldering is extremely important. Figure 10 The current wave soldering exhaust hood, with its 90° structure facing the wave soldering furnace, has the following shortcomings: When the hood uses a duct to extract the exhaust gas, granular solder beads and dross float upwards with the hot air, only to fall back onto the controller motherboard after encountering the hood, affecting the normal operation of the controller motherboard; during long-term use, solder beads and dross will adhere to the inner surface of the exhaust duct, and during wave soldering, these solder beads and dross on the inner wall of the exhaust duct are prone to falling onto the motherboard, posing a serious quality hazard and affecting the yield of the controller motherboard. Summary of the Invention

[0003] The purpose of this invention is to provide an exhaust structure and wave soldering equipment thereof, which aims to solve the technical problem that the current wave soldering fume emission system affects the yield of controller motherboards.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides an exhaust structure applied to a wave soldering machine, the wave soldering machine including an automatic conveying device, the exhaust structure comprising:

[0005] A converging air inlet hood is at least partially positioned above the automatic conveying device;

[0006] The airflow delivery pipe assembly is connected to the convergent air inlet hood;

[0007] Connecting pipe fittings connect the airflow delivery pipe assembly to the converging air inlet hood;

[0008] The connecting pipe is inclined so that the automatic conveying device is located outside the vertical projection range of the opening below the connecting pipe.

[0009] In some embodiments, the automatic conveying device has a supporting ceiling and an air duct for discharging smoke to a preset position. The airflow conveying pipe assembly includes an exhaust pipe, one end of which is fixed to the supporting ceiling and communicates with the air duct, and the other end of which is connected to a connecting pipe.

[0010] In some embodiments, the airflow delivery pipe assembly further includes an airflow drive component, which includes an exhaust fan blade and a drive motor. A bracket is provided inside the exhaust pipe, and the drive motor is mounted on the bracket. The exhaust fan blade is connected to the drive shaft of the drive motor.

[0011] In some embodiments, the exhaust duct is set vertically, and the axis of the connecting pipe is set at a preset angle α with the horizontal direction, wherein the preset angle α is less than 90°;

[0012] The horizontal direction refers to the direction along the horizontal plane toward the automatic conveying device.

[0013] In some implementations, the preset included angle α is in the range of 70°≤a≤75°.

[0014] In some embodiments, the converging air inlet hood has a trumpet-shaped structure, with a first opening and a second opening. The first opening is larger than the second opening, and the second opening is connected to the end of the connecting pipe away from the exhaust pipe. The first opening is set at a preset angle α with the vertical direction.

[0015] In some embodiments, the first opening has a first pointed corner near the automatic conveying device, and the horizontal distance between the first pointed corner and the side of the automatic conveying device away from the converging air inlet hood is b, where b ranges from 20cm to 30cm; and / or, the vertical distance between the first pointed corner and the automatic conveying device is c, where c ranges from 50cm to 60cm; and / or, the minimum horizontal distance between the second opening and the automatic conveying device is d, where d ranges from 0cm to 10cm.

[0016] In some implementations, a detachable fitting is provided between the exhaust duct and the connecting fitting.

[0017] In some embodiments, the detachable fitting includes an insertion plate and an insertion slot that matches the insertion plate; the lower end of the exhaust pipe has two downwardly extending and spaced-apart stiffeners, and the sides of the two stiffeners that are close to each other are provided with hanging protrusions to form an insertion slot at the lower end of the exhaust pipe, and the insertion plate is connected to the upper end of the connecting pipe; or, the upper end of the connecting pipe has two upwardly extending and spaced-apart stiffeners, and the sides of the two stiffeners that are close to each other are provided with hanging protrusions to form an insertion slot at the top of the connecting pipe, and the insertion plate is connected to the lower end of the exhaust pipe.

[0018] According to another aspect of this application, embodiments of the present invention also provide a wave soldering apparatus, the wave soldering apparatus including an automatic conveying device and an exhaust structure as described above.

[0019] Compared with the prior art, the exhaust structure of the present invention has at least the following beneficial effects:

[0020] This invention discloses an exhaust structure, specifically applicable to wave soldering equipment. The wave soldering equipment includes an automatic conveying device. During normal soldering, the controller motherboard is placed on the automatic conveying device, which transports the circuit board and other control motherboards to the soldering area of ​​the wave soldering machine. The wave soldering machine then solders the circuit board and other control motherboards. The exhaust structure of this invention includes a converging air inlet hood, an airflow delivery pipe assembly, and connecting pipes. Specifically, the converging air inlet hood is at least partially positioned above the automatic conveying device, which is specifically the wave soldering track, facilitating the entry of fumes generated during wave soldering into the converging air inlet hood. The airflow delivery pipe assembly is connected to the converging air inlet hood, allowing for the rapid removal of fumes generated during wave soldering through the suction of the airflow delivery pipe assembly. This invention, by setting a connecting pipe between the airflow delivery pipe assembly and the converging air inlet hood, and tilting the connecting pipe, ensures that the opening of the automatic conveying device located below the connecting pipe is outside the vertical projection range. Figure 3 As shown, the upward arrows indicate the path of granular solder beads and dross floating upwards with the hot air, and the downward arrows indicate the path of granular solder beads and dross falling downwards. It can be seen that the exhaust structure of the present invention reduces the probability that granular solder beads and dross float upwards with the hot air and fall back onto the controller motherboard after encountering the inner wall of the exhaust structure, thereby improving the normal operation of the controller motherboard and increasing the yield of the control motherboard.

[0021] In another aspect, the wave soldering equipment provided by the present invention is manufactured based on the above-mentioned exhaust structure, and its beneficial effects are the same as those of the exhaust structure described above, which will not be repeated here.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the assembly structure of the exhaust structure provided in an embodiment of the present invention;

[0025] Figure 2 This is an exploded structural diagram of the exhaust structure provided in an embodiment of the present invention;

[0026] Figure 3A schematic diagram of the smoke flow path and the falling path of granular tin beads and tin dross in the exhaust structure provided in the embodiment of the present invention;

[0027] Figure 4 A schematic diagram showing the positional relationship between the automatic conveying devices of the exhaust structure provided in the embodiments of the present invention;

[0028] Figure 5 This is a schematic diagram of the insertion slot of the exhaust structure provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the insertion slot of the exhaust structure provided in an embodiment of the present invention from another perspective;

[0030] Figure 7 A schematic diagram of a material receiving device provided below the exhaust structure in an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of the structure from another perspective when a receiving device is provided below the exhaust structure provided in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the airflow convergence shroud of the exhaust structure provided in an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the existing exhaust structure.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Automatic conveying device;

[0036] 2. Airflow delivery pipe assembly; 21. Exhaust duct; 211. Rib plate; 212. Hanging flange; 22. Airflow drive assembly;

[0037] 3. Converging air inlet hood; 31. First opening; 311. First pointed corner; 32. Second opening;

[0038] 4. Connecting pipe fittings;

[0039] 5. Detachable mating parts; 51. Insertion plate; 52. Insertion slot;

[0040] 6. Receiving device. Detailed Implementation

[0041] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0042] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0043] 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Example 1

[0045] like Figure 1-9 As shown, this embodiment of the invention provides an exhaust structure applied to a wave soldering machine. The wave soldering machine includes an automatic conveying device 1, and the exhaust structure includes:

[0046] A converging air inlet hood 3 is at least partially positioned above the automatic conveying device 1;

[0047] The airflow delivery pipe assembly 2 is connected to the converging air inlet hood 3;

[0048] Connecting pipe 4 connects the airflow delivery pipe assembly 2 and the converging air inlet hood 3;

[0049] The connecting pipe 4 is inclined so that the automatic conveying device 1 is located outside the vertical projection range of the opening below the connecting pipe 4.

[0050] In this embodiment, the exhaust structure can be specifically applied to a wave soldering equipment. The wave soldering equipment includes an automatic conveying device 1. During normal soldering, the controller motherboard is placed on the automatic conveying device 1. The automatic conveying device 1 conveys the circuit board and other control motherboards to the soldering area of ​​the wave soldering machine, and the circuit board and other control motherboards are soldered by wave soldering.

[0051] The exhaust structure of this embodiment includes: a converging air inlet hood 3, an airflow delivery pipe assembly 2, and a connecting pipe 4. Specifically, the converging air inlet hood 3 is at least partially positioned above the automatic conveying device 1, which is specifically a wave soldering track, facilitating the entry of wave soldering fumes into the converging air inlet hood 3. The airflow delivery pipe assembly 2 is connected to the converging air inlet hood 3, and the fumes generated by wave soldering can be quickly drawn away by the suction of the airflow delivery pipe assembly 2. In this embodiment, by setting a connecting pipe 4 between the airflow delivery pipe assembly 2 and the converging air inlet hood 3, the connecting pipe 4 is a tubular structure and is inclined, so that the opening of the automatic conveying device 1 located below the connecting pipe 4 is outside the vertical projection range. Figure 3 As shown, the upward arrows indicate the path of granular solder beads and dross floating upward with the hot air, and the downward arrows indicate the path of granular solder beads and dross falling downward. It can be seen that the exhaust structure of this embodiment reduces the probability that granular solder beads and dross float upward with the hot air and fall back onto the controller motherboard after encountering the inner wall of the exhaust structure, thereby improving the normal operation of the controller motherboard and increasing the yield of the controller motherboard.

[0052] During long-term use, the converging air inlet hood 3 is the easiest to clean, and workers can clean it promptly without solder balls or dross adhering to it. However, the airflow conveying pipe assembly 2 and the connecting pipe 4 are difficult to clean, and solder balls or dross adhere to their inner surfaces. Currently, the airflow conveying pipe assembly 2 and the connecting pipe 4 of the exhaust system are vertically arranged. During wave soldering, the solder balls or dross on the airflow conveying pipe assembly 2 and the connecting pipe 4 fall onto the control board through the bottom opening of the connecting pipe 4, posing a serious quality hazard. In this embodiment, by setting the connecting pipe 4 between the airflow conveying pipe assembly 2 and the converging air inlet hood 3 and tilting the connecting pipe 4, the opening of the automatic conveying device 1 located below the connecting pipe 4 is outside the vertical projection range. Therefore, solder balls or dross will not fall onto the controller board, avoiding quality hazards and improving the yield of the control board.

[0053] If solder balls or dross fall onto the control motherboard without directly short-circuiting, the production test cannot report the fault immediately. After being transported and shaken, and after the adhesive solidifies, the solder balls or dross adhere to the components, causing short circuits and leading to after-sales quality issues, resulting in after-sales repair costs and failure rates. If solder balls or dross residue causes the motherboard to fail, it will require a large number of personnel to repackage and inspect it, wasting manpower and resources. Moreover, the use of soldering irons during rework poses certain quality risks. The venting structure in this embodiment reduces the probability of control motherboard rework, after-sales repair costs, and failure rates.

[0054] In some embodiments, the automatic conveying device 1 has a supporting ceiling and an air duct for discharging smoke to a preset position. The airflow conveying pipe assembly 2 includes an exhaust pipe 21, which is a tubular structure. One end of the exhaust pipe 21 is fixed to the supporting ceiling and communicates with the air duct, while the other end of the exhaust pipe 21 is connected to the connecting pipe 4.

[0055] In this embodiment, the automatic conveying device 1 has a supporting ceiling and an air duct for discharging smoke to a preset position. The supporting ceiling can be the ceiling of the roof, and the air duct is a smoke discharge pipe. The airflow conveying pipe group 2 includes an exhaust pipe 21. One end of the exhaust pipe 21 is fixed to the supporting ceiling and communicates with the air duct. The other end of the exhaust pipe 21 is connected to the connecting pipe 4 to form a complete smoke discharge channel.

[0056] In some embodiments, the airflow delivery pipe assembly 2 further includes an airflow drive assembly 22, which includes an exhaust fan blade and a drive motor. A bracket is provided inside the exhaust pipe 21, and the drive motor is mounted on the bracket. The exhaust fan blade is connected to the drive shaft of the drive motor.

[0057] In this embodiment, the airflow drive assembly 22 includes exhaust fan blades and a drive motor. A bracket is provided inside the exhaust pipe 21, and the drive motor is mounted on the bracket. The drive motor is fixed inside the exhaust pipe 21 by the bracket. The exhaust fan blades are connected to the drive shaft of the drive motor. The drive shaft of the drive motor drives the exhaust fan blades to quickly extract the smoke.

[0058] In some embodiments, the exhaust pipe 21 is vertically arranged, and the axis of the connecting pipe 4 is set at a preset angle α with the horizontal direction, wherein the preset angle α is less than 90°.

[0059] The horizontal direction is the direction along the horizontal plane toward the automatic conveying device 1.

[0060] In this embodiment, the axis of the exhaust pipe 21 is vertically arranged, and the axis of the connecting pipe 4 is set at a preset angle α with the horizontal direction, where the preset angle α is less than 90°; the horizontal direction is the direction along the horizontal plane toward the automatic conveying device 1 (e.g., Figure 4(as indicated by the arrow in the middle), by controlling the axis of the connecting pipe 4 to form a preset angle α with the horizontal direction, it is convenient to determine the tilt angle, which facilitates the manufacturing and production of the exhaust structure in this embodiment.

[0061] Tables 1 and 2 are comparison tables of the number of defective control motherboards when the included angle α has different values. The total number of samples in each group is equal. Tables 1 and 2 are the control motherboards transported by the automatic conveying device in 4 hours.

[0062] Serial Number included angle a Number of defects Serial Number included angle a Number of defects Serial Number included angle a Number of defects 1 90 26 1 85 14 1 80 12 2 90 18 2 85 16 2 80 13 3 90 16 3 85 17 3 80 10 4 90 10 4 85 13 4 80 9 5 90 25 5 85 10 5 80 11 6 90 23 6 85 9 6 80 8 7 90 21 7 85 12 7 80 13 8 90 19 8 85 11 8 80 14 9 90 15 9 85 14 9 80 8 10 90 20 10 85 10 10 80 7

[0063] Table 1

[0064] Serial Number included angle a Number of defects Serial Number included angle a Number of defects Serial Number included angle a Number of defects 1 75 10 1 70 13 1 65 13 2 75 8 2 70 6 2 65 11 3 75 11 3 70 9 3 65 15 4 75 9 4 70 10 4 65 10 5 75 12 5 70 12 5 65 9 6 75 9 6 70 11 6 65 14 7 75 6 7 70 12 7 65 13 8 75 7 8 70 8 8 65 8 9 75 9 9 70 7 9 65 10 10 75 10 10 70 6 10 65 7

[0065] Table 2

[0066] In some implementations, the preset included angle α is in the range of 70°≤a≤75°.

[0067] In this embodiment, a comparison of Table 1 and Table 2 shows that the number of defective control motherboards is lowest when the angle is 70°≤a≤75°. Therefore, the range of the preset angle a is 70°≤a≤75°, resulting in a lower number of defective control motherboards and a higher yield. Preferably, based on long-term statistics, when the preset angle a is 73°, the number of defective control motherboards is lower and the yield is highest.

[0068] In some embodiments, the converging air inlet hood 3 has a trumpet-shaped structure, and the converging air inlet hood 3 has a first opening 31 and a second opening 32. The first opening 31 is larger than the second opening 32. The second opening 32 is connected to the end of the connecting pipe 4 away from the exhaust pipe 21. The first opening 31 is set at a preset angle α with the vertical direction.

[0069] In this embodiment, the converging air intake hood 3 has a trumpet-shaped structure. The axis of the converging air intake hood 3 and the axis of the connecting pipe 4 can be coaxially arranged. The converging air intake hood 3 has a first opening 31 and a second opening 32. The first opening 31 is larger than the second opening 32. The second opening 32 is connected to the end of the connecting pipe 4 away from the exhaust pipe 21. The first opening 31 is set at a preset angle α with the vertical direction, so that the smoke can be gathered by the converging air intake hood 3 and enter the connecting pipe 4. It is then quickly drawn away by the airflow drive component 22 in the exhaust pipe 21. The outer wall of the converging air intake hood 3 is set at an angle e with the horizontal plane, where 125°≥e≥120°, so that the smoke flows more smoothly.

[0070] In some embodiments, the first opening 31 has a first pointed corner 311 near the automatic conveying device 1, and the horizontal distance between the first pointed corner 311 and the side of the automatic conveying device 1 away from the converging air inlet hood 3 is b, where b ranges from 20cm to 30cm; and / or, the vertical distance between the first pointed corner 311 and the automatic conveying device 1 is c, where c ranges from 50cm to 60cm; and / or, the minimum horizontal distance between the second opening 32 and the automatic conveying device 1 is d, where d ranges from 0cm to 10cm.

[0071] In this embodiment, by controlling the horizontal distance b between the first sharp corner 311 and the side of the automatic conveying device 1 away from the converging air intake hood 3 to be within the range of 20cm≤b≤30cm, not only are granular solder beads and dross prevented from falling onto the control board, but also the smoke is ensured to smoothly enter the converging air intake hood 3, thus ensuring the smoke extraction effect of the converging air intake hood 3. Preferably, b is 25cm. Furthermore, by controlling the vertical distance c between the first sharp corner 311 and the automatic conveying device 1 to be within the range of 50cm… When m≤c≤60cm, it not only prevents granular solder beads and dross from falling onto the control board, but also ensures that the smoke enters the converging air intake hood 3 smoothly, thus ensuring the smoke extraction effect of the converging air intake hood 3. The preferred c is 55cm. By controlling the minimum horizontal distance d between the second opening 32 and the automatic conveying device 1 to a range of 0cm≤d≤10cm, it is possible to prevent granular solder beads and dross from falling onto the control board, while ensuring that the smoke enters the converging air intake hood 3 smoothly, thus ensuring the smoke extraction effect of the converging air intake hood 3.

[0072] Because the exhaust pipe 21 and connecting fitting 4 often need to be manually cleaned during wave soldering to prevent blockage and affect the smoke extraction effect, there is a risk of employees being burned by the hot air generated by the wave soldering.

[0073] In some embodiments, a detachable fitting 5 is provided between the exhaust pipe 21 and the connecting fitting 4, which makes it easy to disassemble the exhaust pipe 21 and the connecting fitting 4, facilitates assembly and disassembly, and makes it easy to clean the exhaust pipe 21, the airflow drive component 22 and the connecting fitting 4. Disassembly and cleaning also avoids the risk of employees being burned by the hot air generated by the wave crest during operation.

[0074] In some embodiments, the detachable fitting 5 includes an insertion plate 51 and an insertion groove 52 that matches the insertion plate 51; the lower end of the exhaust pipe 21 has two downwardly extending and spaced-apart stiffeners 211, and the side of the two stiffeners 211 that are close to each other is provided with a hanging protrusion 212 to form an insertion groove 52 at the lower end of the exhaust pipe 21, and the insertion plate 51 is connected to the upper end of the connecting pipe 4.

[0075] In this embodiment, the detachable fitting 5 includes an insertion plate 51 and an insertion slot 52 that matches the insertion plate 51. Specifically, two stiffening plates 211 are spaced apart at the lower end of the exhaust pipe 21. The two stiffening plates 211 extend downward and each of the two stiffening plates 211 has a hanging protrusion 212 on its adjacent side. Therefore, two insertion slots 52 can be formed at the lower end of the exhaust pipe 21. The insertion plate 51 is connected to the upper end of the connecting pipe 4. The insertion plate 51 is opened with an air passage hole that matches the connecting pipe 4. During assembly, the two ends of the insertion plate 51 are inserted into the two insertion slots 52 to hang the connecting pipe 4 below the exhaust pipe 21. This structure is simple, easy to manufacture, and facilitates the assembly between the connecting pipe 4 and the exhaust pipe 21. It also facilitates the cleaning of the exhaust pipe 21, the airflow drive assembly 22, and the connecting pipe 4.

[0076] In some embodiments, the upper end of the connecting pipe 4 has two upwardly extending and spaced-apart stiffeners 211, and the side of the two stiffeners 211 that are close to each other is provided with a hanging protrusion 212 to form an insertion groove 52 on the top of the connecting pipe 4, and the insertion plate 51 is connected to the lower end of the exhaust pipe 21.

[0077] In this embodiment, two stiffening plates 211 are spaced apart at the upper end of the connecting pipe 4. The two stiffening plates 211 extend upward and are provided with hanging protrusions 212 on the side of the two stiffening plates 211 that are close to each other. Two insertion slots 52 can be formed on the top of the connecting pipe 4. The insertion plate 51 is connected to the lower end of the exhaust pipe 21. The insertion plate 51 is opened in the air passage hole that is adapted to the exhaust pipe 21. During assembly, the two ends of the insertion plate 51 are inserted into the two insertion slots 52 to hang the connecting pipe 4 below the exhaust pipe 21. This structure is simple, easy to manufacture, and facilitates the assembly between the connecting pipe 4 and the exhaust pipe 21. It also facilitates the cleaning of the exhaust pipe 21, the airflow drive assembly 22, and the connecting pipe 4.

[0078] In some embodiments, the insertion slot 52 has a limiting structure that positions the insertion plate 51. When installed in place, the insertion plate 51 is blocked by the limiting structure, which facilitates installation. The insertion slot 52 extends horizontally to prevent the insertion plate 51 from falling out of the insertion slot 52. The insertion plate 51 can also be reinforced with screws after installation.

[0079] For the sake of cleaning the site, such as Figure 7 and 8 As shown, a receiving device 6 can be installed directly below the opening of the connecting pipe 4 to prevent granular solder beads and slag from falling to the ground and to facilitate cleaning.

[0080] In summary, the exhaust structure of this invention modifies the angle of the wave soldering fume hood, greatly reducing the amount of solder balls and dross remaining on the controller motherboard.

[0081] The exhaust structure of this invention changes the vertical 90° tin furnace smoke extraction method to an inclined angle smoke extraction method, thereby reducing the problem of surface tin dross attached to the smoke hood falling onto the control motherboard.

[0082] The exhaust structure of this invention reduces the after-sales failure rate of the control motherboard due to solder balls and dross, ensuring the life of the air conditioner and reducing after-sales maintenance costs.

[0083] The exhaust structure of this invention reduces the impact of solder balls and dross on the control board failure, reduces the possibility of missed inspections by employees and equipment AOI, and reduces the risk of personnel repackaging soldering irons and wasting working hours.

[0084] The exhaust structure of this invention is simple to operate and easy to disassemble, clean and maintain.

[0085] Example 2

[0086] This invention also provides a wave soldering device, which includes an automatic conveying device 1 and the exhaust structure of embodiment 1.

[0087] It will be readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0088] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An exhaust structure applied to a wave soldering machine, the wave soldering machine comprising an automatic conveying device, characterized in that, The exhaust structure includes: A converging air inlet hood, which at least partially covers the automatic conveying device; The airflow delivery pipe assembly is connected to the convergent air inlet hood; A connecting pipe fitting is used to connect the airflow delivery pipe assembly and the converging air inlet shroud. The connecting pipe is inclined so that the automatic conveying device is located outside the vertical projection range of the opening below the connecting pipe. The automatic conveying device has a supporting ceiling and an air duct to guide the smoke to a preset position. The airflow conveying pipe assembly includes an exhaust pipe. One end of the exhaust pipe is fixed to the supporting ceiling and communicates with the air duct. The other end of the exhaust pipe is connected to the connecting pipe. The exhaust duct is vertically arranged, and the axis of the converging air inlet hood is coaxial with the axis of the connecting pipe; the axis of the connecting pipe is set at a preset angle α with the horizontal direction, and the preset angle α is less than 90°; wherein, the horizontal direction is the direction along the horizontal plane toward the automatic conveying device; The outer wall of the air inlet hood is set at an angle e to the horizontal plane, and the value of angle e is in the range of: 125°≥e≥120°.

2. The exhaust structure according to claim 1, characterized in that, The airflow delivery pipe assembly also includes an airflow drive component, which includes an exhaust fan blade and a drive motor. A bracket is provided inside the exhaust pipe, and the drive motor is mounted on the bracket. The exhaust fan blade is connected to the drive shaft of the drive motor.

3. The exhaust structure according to claim 1, characterized in that, The range of the preset included angle α is: 70°≤a≤75°.

4. The exhaust structure according to claim 1, characterized in that, The converging air inlet hood has a trumpet-shaped structure and has a first opening and a second opening. The first opening is larger than the second opening. The second opening is connected to the end of the connecting pipe that is away from the exhaust pipe. The first opening is set at the preset angle α with the vertical direction.

5. The exhaust structure according to claim 4, characterized in that, The first opening has a first pointed corner near the automatic conveying device. The horizontal distance between the first pointed corner and the side of the automatic conveying device away from the converging air inlet hood is b, where b ranges from 20cm to 30cm. And / or, the vertical distance between the first pointed corner and the automatic conveying device is c, where c ranges from 50cm to 60cm. And / or, the minimum horizontal distance between the second opening and the automatic conveying device is d, where d ranges from 0cm to 10cm.

6. The exhaust structure according to claim 1, characterized in that, A detachable fitting is provided between the exhaust pipe and the connecting pipe.

7. The exhaust structure according to claim 6, characterized in that, The detachable fitting includes an insertion plate and an insertion slot that matches the insertion plate; the lower end of the exhaust pipe has two downwardly extending and spaced-apart stiffeners, and the sides of the two stiffeners that are close to each other are provided with hanging protrusions to form the insertion slot at the lower end of the exhaust pipe, and the insertion plate is connected to the upper end of the connecting pipe; or, the upper end of the connecting pipe has two upwardly extending and spaced-apart stiffeners, and the sides of the two stiffeners that are close to each other are provided with hanging protrusions to form the insertion slot at the top of the connecting pipe, and the insertion plate is connected to the lower end of the exhaust pipe.

8. A wave soldering equipment, characterized in that, The wave soldering equipment includes an automatic conveying device and an exhaust structure as described in any one of claims 1-7.

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