A PCB welding device with smoke removal function

Abstract

The present invention discloses a PCB board welding device with a smoke removal function, which relates to the technical field of PCB board welding. The welding device is used for welding PCB boards and is characterized in that the welding device includes a shell, a capture device, a temperature control device, and a drive device. The shell is provided with a working chamber, the capture device and the temperature control device are placed in the working chamber, the capture device and the temperature control device are connected by pipes, the drive device is connected to the shell, and the drive device and the capture device are tightly connected. When welding the PCB board of an electric vehicle, the PCB board is transported into the working chamber by the drive device. When it is moved to the welding station, automatic welding is performed. The smoke generated by welding is dispersed by providing a capture device and automatically collected to prevent the generation of large smoke particles in the welding space. The large particles are prevented from adhering to the PCB board after cooling and affecting the welding quality. The temperature control device is provided to automatically cool the solder joints of the PCB board after welding to prevent the welding quality from being affected.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board welding, in particular to a PCB board welding device with a smoke removal function. Background Art

[0002] Electric vehicles are a common means of transportation and are widely used for short-distance riding. As core control components, electric vehicle PCB boards have high production quality requirements, and the production of PCB boards mainly involves welding processes.

[0003] Soldering PCBs can easily generate smoke. Initially, the smoke rises due to buoyancy. At high speeds, the smoke column narrows and converges, forming larger smoke particles. As the temperature drops, these particles fall onto the PCB, forming tin beads. These tin beads not only affect the PCB's appearance but can also cause short circuits between electrical components during the discharge process, shortening the life of electrical instruments.

[0004] In addition, the smoke concentration generated during welding in different area sizes is also different. Conventional smoke removal devices are unable to perform real-time detection and actively adjust the smoke removal efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a PCB board welding device with a smoke removal function to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The welding device is used for welding PCB boards, and is characterized in that the welding device includes a shell, a capture device, a temperature control device and a drive device. The shell is provided with a working chamber, the capture device and the temperature control device are placed in the working chamber, the capture device and the temperature control device are connected by pipes, the drive device is connected to the shell, and the drive device and the capture device are tightly connected. The capture device is used to disperse the smoke generated by welding the PCB board.

[0008] When welding the PCB board of an electric vehicle, the PCB board is transported into the working chamber by a driving device. When it is moved to the welding station, automatic welding is performed. A capture device is provided to disperse the smoke generated by welding and automatically collect it to prevent the generation of large smoke particles in the welding space. This prevents large particles from adhering to the PCB board after cooling and affecting the welding quality. A temperature control device is provided to automatically cool the solder joints of the PCB board after welding to prevent affecting the welding quality.

[0009] Furthermore, the driving device includes a driving module and a welding head, the driving module and the working chamber are tightly connected, the driving module is a cross module, and the output end of the driving module is tightly connected to the welding head and the capturing device respectively;

[0010] The capture device includes a top suction hood and a guide assembly, which are movably connected to the guide assembly. The guide assembly includes a guide seat, which is fastened to the output end of the drive module. The guide seat is provided with a rotary groove, and the top suction hood and the rotary groove are rotatably connected. The lower end of the welding head passes through the top suction hood, and a plurality of negative pressure suction holes are provided on the top suction hood. The inlet of the negative pressure suction hole faces the solder joint of the PCB board. A drainage channel is provided on the guide seat, and the end of the negative pressure suction hole is connected to the drainage channel pipe.

[0011] The driving device serves as the main power source, providing vertical and horizontal displacements through the driving module of the cross module structure. The horizontal module is fixed to the wall of the working chamber, and the output end drives the vertical module to move. The output end of the vertical module is connected to the welding head and the capture device respectively, and drives the welding head and the capture device to move at the same time. The capture device arranges several low-pressure areas near the welding point through several negative pressure suction holes on the top suction hood. The smoke generated by welding rises steadily in the form of laminar flow at low altitude, the streamlines are concentrated, and the smoke particles gather into large particles. The drainage channel is connected to the negative pressure gas source, and the several low-pressure areas arranged through the negative pressure suction holes make the smoke generated by welding be affected by the pressure difference in the low-altitude area and diffuse to the surrounding area, avoiding smoke aggregation and preventing the generation of large particles in the welding area.

[0012] Furthermore, the guide assembly also includes a rotary motor, a transmission cavity is provided on the guide seat, the guide seat is placed in the transmission cavity, a transmission gear is provided at the output end of the guide seat, an external tooth surface is provided on the top suction cover, and the output end of the guide seat is meshed with the external tooth surface through the transmission gear.

[0013] The rotary motor is fixed through the transmission chamber. The rotary motor is used to output torque, drive the transmission gear to rotate, and the transmission gear engages with the external tooth surface, thereby driving the top suction hood to rotate. When the top suction hood rotates, due to the negative pressure suction holes axially arranged in the inner cavity of the top suction hood, the inner cavity as a whole tends to the negative pressure zone. Under the action of the pressure difference, the smoke generated by welding flows directly in the circumferential direction and is enriched through the negative pressure suction holes, instead of being in a laminar flow upward.

[0014] Furthermore, the drainage channel is arranged in a ring shape, the capturing device further includes a filter, and the drainage channel outlet is connected to the negative pressure gas source through the filter.

[0015] The drainage channel is evacuated through a negative pressure air source, thereby creating negative pressure in the negative pressure suction hole. When the smoke enters the annular drainage channel from the negative pressure suction hole, it is guided through the drainage channel and sent into the filter, which automatically filters impurities in the smoke to prevent the smoke from diffusing and adhering to the PCB board, affecting the welding quality.

[0016] Furthermore, the capture device also includes a sensing component, which includes a light emitting plate and a mounting plate, which are arranged through the middle of the top suction hood. One side of the light emitting plate and the mounting plate are respectively fastened to the inner wall of the top suction hood. A photosensitive layer is provided on the side of the mounting plate away from the inner wall of the top suction hood. Two electrode sheets are provided on the photosensitive layer. The light emitting direction of the light emitting plate is toward the photosensitive layer. The two electrode sheets are respectively electrically connected to the two wiring terminals of the photosensitive power supply to form a photosensitive circuit.

[0017] The light emitting plate and the mounting plate are fixed through the inner cavity of the top suction hood. The light emitting plate is used to emit parallel light, which passes through the smoke flowing in the circumferential direction. During the welding process, the greater the smoke concentration, the greater the optical path loss of the parallel light, that is, the smaller the light intensity irradiated on the photosensitive layer, which irradiates the photosensitive layer and excites electron-hole pairs, making the circuit between the two electrode sheets conductive and generating photosensitive current. The smoke concentration and the photosensitive current are negatively correlated, that is, the greater the smoke concentration, the smaller the photosensitive current.

[0018] Furthermore, the guide assembly also includes a plurality of air compressor plates, which are fastened to the top suction cover, are located at the inlet of the negative pressure suction hole, are arranged at an angle, and the rotary motor is electrically connected to the photosensitive circuit.

[0019] By setting an air compression plate at the inlet of the negative pressure suction hole and arranging it tilted, when the top suction hood rotates, part of the air is pressed toward the negative pressure suction hole, thereby increasing the pressure difference and improving the radial flow efficiency of the smoke at the welding point.

[0020] Furthermore, the temperature regulating device includes a first hot air pipe, a plurality of air supply channels are provided on the top suction hood, the outlet of the first hot air pipe is connected to the air supply channel pipeline, and the plurality of air supply channel outlets are arranged toward the welding point.

[0021] By setting the first hot air pipe, temperature compensation is performed on the space at the welding point and the negative pressure suction hole, so that the smoke will not solidify prematurely when flowing radially, avoiding affecting the smoke collection quality.

[0022] Furthermore, the temperature control device also includes a second hot air duct and a cooling air duct, a preheating chamber and a cooling chamber are provided on the guide seat, the second hot air duct is connected to the preheating chamber pipeline, the cooling air duct is connected to the cooling chamber pipeline, and the preheating chamber and the cooling chamber are set to open on one side downward.

[0023] By setting up a second hot air duct, impurities on the surface of the PCB board are cleaned through the second hot air duct before welding. The built-in electric heating wire preheats the PCB board at the same time. After preheating, welding is carried out at the position to be welded. Automatic smoke removal is performed during welding. The PCB board after smoke removal is sent to the bottom of the cooling chamber, and the cooling air duct is used to automatically cool the soldering point, thereby improving welding efficiency.

[0024] Furthermore, the driving device also includes a conveyor and a carrier plate. The conveyor is tightly connected to the shell. A plurality of carrier plates are provided on the conveyor, and the carrier plates are used to clamp the PCB boards.

[0025] The PCB board is continuously transported by setting a conveyor, fixed on the shell, and passed through the working chamber. A chain plate mechanism can be used, and a carrier plate is set on the conveyor chain to clamp the PCB board through the carrier plate, thereby ensuring welding accuracy.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the capture device arranges several low-pressure areas near the welding point through several negative-pressure suction holes on the top suction hood, and the smoke generated by welding rises steadily in the form of laminar flow at low altitude, the streamlines are concentrated, and the smoke particles gather into large particles. The drainage channel is connected to the negative-pressure gas source, and the several low-pressure areas arranged through the negative-pressure suction holes make the smoke generated by welding be affected by the pressure difference in the low-altitude area and diffuse to the surrounding area, avoiding smoke convergence and preventing large particles from being generated in the welding area; when the top suction hood rotates, due to the negative-pressure suction holes axially arranged in the inner cavity of the top suction hood, the inner cavity as a whole tends to the negative-pressure area, and the smoke generated by welding flows directly in the circumferential direction under the action of the pressure difference, and is enriched through the negative-pressure suction holes, and will not be in a laminar flow upward; by arranging an air compression plate at the inlet of the negative-pressure suction hole and arranging it tilted, part of the air is pressed toward the negative-pressure suction hole when the top suction hood rotates, and the radial flow efficiency of the smoke at the welding point is improved by increasing the pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the driving device of the present invention;

[0029] Figure 3 This is a schematic diagram of the driving of the welding head of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the guide assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of the top suction cover structure of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the guide seat of the present invention;

[0033] Figure 7 for Figure 3 A magnified view of a part A of the view;

[0034] Figure 8 It is a schematic diagram of PCB board conveying of the present invention.

[0035] In the figure: 1. Shell; 11. Working chamber; 2. Capturing device; 21. Top suction hood; 211. Negative pressure suction hole; 212. External tooth surface; 213. Air supply channel; 22. Guide assembly; 221. Guide seat; 2211. Preheating chamber; 2212. Cooling chamber; 2213. Rotating trough; 2214. Drainage channel; 2215. Transmission chamber; 222. Rotating motor; 223. Air compressor; 23. Induction assembly; 231. Light output plate; 232. Mounting plate; 233. Photosensitive layer; 234. Electrode sheet; 24. Filter; 3. Temperature control device; 31. First hot air pipe; 32. Second hot air pipe; 33. Cooling air pipe; 4. Driving device; 41. Driving module; 42. Welding head; 43. Conveyor; 44. Carrier board. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example: Figures 1-8 As shown, the present invention provides a technical solution for a PCB board welding device with a smoke removal function.

[0038] The welding device is used for welding PCB boards, and is characterized in that the welding device includes a shell 1, a capture device 2, a temperature control device 3 and a drive device 4. The shell 1 is provided with a working chamber 11. The capture device 2 and the temperature control device 3 are placed in the working chamber 11. The capture device 2 and the temperature control device 3 are connected by pipes. The drive device 4 is connected to the shell 1. The drive device 4 and the capture device 2 are tightly connected. The capture device 2 is used to disperse the smoke generated by welding the PCB board.

[0039] When welding the PCB board of an electric vehicle, the PCB board is transported into the working chamber 11 by the driving device 4. When it is moved to the welding station, automatic welding is performed. The smoke generated by the welding is dispersed by the capture device 2 and automatically collected to prevent the generation of large smoke particles in the welding space. The large particles are prevented from adhering to the PCB board after cooling and affecting the welding quality. The solder joints of the PCB board after welding are automatically cooled by the temperature control device 3 to prevent the welding quality from being affected.

[0040] Furthermore, the driving device 4 includes a driving module 41 and a welding head 42. The driving module 41 is fastened to the working chamber 11. The driving module 41 is a cross module. The output end of the driving module 41 is fastened to the welding head 42 and the capturing device 2 respectively.

[0041] The capturing device 2 includes a top suction hood 21 and a guide assembly 22, which are movably connected to each other. The guide assembly 22 includes a guide seat 221, which is fastened to the output end of the driving module 41. A rotary groove 2213 is provided on the guide seat 221, and the top suction hood 21 and the rotary groove 2213 are rotatably connected. The lower end of the welding head 42 passes through the top suction hood 21, and a plurality of negative pressure suction holes 211 are provided on the top suction hood 21. The inlet of the negative pressure suction hole 211 faces the soldering point of the PCB board. A drainage channel 2214 is provided on the guide seat 221, and the end of the negative pressure suction hole 211 is connected to the drainage channel 2214 pipeline.

[0042] The driving device 4 serves as the main power source, providing vertical and horizontal displacements through the driving module 41 of the cross module structure. The horizontal module is fixed to the wall of the working chamber 11, and the output end drives the vertical module to move. The output end of the vertical module is connected to the welding head 42 and the capturing device 2 respectively, and drives the welding head 42 and the capturing device 2 to move at the same time. The capturing device 2 arranges a number of low-pressure areas near the welding point through a number of negative pressure suction holes 211 on the top suction hood 21. The smoke generated by welding rises steadily in the form of laminar flow at low altitude, with streamlines concentrated, and the smoke particles gather into large particles. The drainage channel 2214 is connected to the negative pressure gas source. Through the several low-pressure areas arranged through the negative pressure suction holes 211, the smoke generated by welding is affected by the pressure difference in the low-altitude area and diffuses to the surrounding area, avoiding smoke aggregation and preventing the generation of large particles in the welding area.

[0043] Furthermore, the guide assembly 22 also includes a rotary motor 222, a transmission cavity 2215 is provided on the guide seat 221, the guide seat 221 is placed in the transmission cavity 2215, a transmission gear is provided at the output end of the guide seat 221, and an external tooth surface 212 is provided on the top suction cover 21, and the output end of the guide seat 221 is engaged with the external tooth surface 212 through the transmission gear.

[0044] The rotary motor 222 is fixed through the transmission chamber 2215. The rotary motor 222 is used to output torque, drive the transmission gear to rotate, and the transmission gear and the outer tooth surface 212 are engaged, thereby driving the top suction hood 21 to rotate. When the top suction hood 21 rotates, due to the negative pressure suction hole 211 axially arranged in the inner cavity of the top suction hood 21, the inner cavity as a whole tends to the negative pressure zone. Under the action of the pressure difference, the smoke generated by welding flows directly in the circumferential direction and is enriched through the negative pressure suction hole 211, instead of being in a laminar flow upward.

[0045] Furthermore, the drainage channel 2214 is arranged in a ring shape, and the capturing device 2 further includes a filter 24 . The outlet of the drainage channel 2214 is connected to the negative pressure gas source through the filter 24 .

[0046] The drainage channel 2214 is evacuated by a negative pressure gas source, thereby creating a negative pressure in the negative pressure suction hole 211. When the smoke enters the annular drainage channel 2214 from the negative pressure suction hole 211, it is guided through the drainage channel 2214 and sent into the filter 24, which automatically filters the impurities in the smoke to prevent the smoke from diffusing and adhering to the PCB board, affecting the welding quality.

[0047] Furthermore, the capture device 2 also includes a sensing component 23, which includes a light-emitting plate 231 and a mounting plate 232, which are arranged through the middle of the top suction cover 21. The light-emitting plate 231 and one side of the mounting plate 232 are respectively fastened to the inner wall of the top suction cover 21. The mounting plate 232 is provided with a photosensitive layer 233 on the side away from the inner wall of the top suction cover 21, and two electrode sheets 234 are provided on the photosensitive layer 233. The light-emitting direction of the light-emitting plate 231 is toward the photosensitive layer 233, and the two electrode sheets 234 are respectively electrically connected to the two wiring terminals of the photosensitive power supply to form a photosensitive circuit.

[0048] The light emitting plate 231 and the mounting plate 232 are fixed through the inner cavity of the top suction cover 21. The light emitting plate 231 is used to emit parallel light, and the parallel light passes through the smoke flowing in the circumferential direction. During the welding process, the greater the smoke concentration, the greater the optical path loss of the parallel light, that is, the smaller the light intensity irradiated on the photosensitive layer 233, and the light irradiated on the photosensitive layer 233 and excited the electron-hole pairs, so that the circuit between the two electrode sheets 234 is turned on and a photosensitive current is generated. The smoke concentration and the photosensitive current are negatively correlated, that is, the greater the smoke concentration, the smaller the photosensitive current.

[0049] Furthermore, the guide assembly 22 also includes a plurality of air pressure plates 223, which are fastened to the top suction cover 21, and the air pressure plates 223 are located at the inlet of the negative pressure suction hole 211. The air pressure plates 223 are arranged at an angle, and the rotary motor 222 is electrically connected to the photosensitive circuit.

[0050] By setting an air compression plate 223 at the inlet of the negative pressure suction hole 211 and arranging it tilted, when the top suction hood 21 rotates, part of the air is pressed toward the negative pressure suction hole 211, thereby increasing the pressure difference and improving the radial flow efficiency of the smoke at the welding point.

[0051] Furthermore, the temperature regulating device 3 includes a first hot air pipe 31, and a plurality of air supply channels 213 are provided on the top suction hood 21. The outlet of the first hot air pipe 31 is connected to the air supply channel 213, and the outlets of the plurality of air supply channels 213 are arranged toward the welding point.

[0052] By providing the first hot air pipe 31 , temperature compensation is performed on the space between the welding point and the negative pressure suction hole 211 , so that the smoke will not solidify prematurely when flowing radially, thereby avoiding affecting the smoke collection quality.

[0053] Furthermore, the temperature control device 3 also includes a second hot air duct 32 and a cooling air duct 33. A preheating chamber 2211 and a cooling chamber 2212 are provided on the guide seat 221. The second hot air duct 32 and the preheating chamber 2211 are connected by pipeline, and the cooling air duct 33 and the cooling chamber 2212 are connected by pipeline. The preheating chamber 2211 and the cooling chamber 2212 are set to open on one side downward.

[0054] By providing the second hot air duct 32, impurities on the surface of the PCB board are cleaned by the second hot air duct 32 before welding. The built-in electric heating wire preheats the PCB board at the same time. After preheating, welding is performed on the position to be welded. Automatic smoke removal is performed during welding. The PCB board after smoke removal is sent to the bottom of the cooling chamber 2212, and the soldering point is automatically cooled by the cooling air duct 33, thereby improving welding efficiency.

[0055] Furthermore, the driving device 4 further includes a conveyor 43 and a carrier plate 44. The conveyor 43 is tightly connected to the housing 1. A plurality of carrier plates 44 are provided on the conveyor 43. The carrier plates 44 are used to clamp the PCB boards.

[0056] The PCB board is continuously conveyed by setting a conveyor 43, fixed on the shell 1, and passed through the working chamber 11. A chain plate mechanism can be used, and a carrier plate 44 is set on the conveyor chain. The PCB board is clamped by the carrier plate 44 to ensure welding accuracy.

[0057] The working principle of the present invention is as follows: the capture device 2 arranges a number of low-pressure areas near the welding point through a number of negative pressure suction holes 211 on the top suction hood 21. The smoke generated by welding rises steadily in the form of laminar flow at low altitude, the streamlines are concentrated, and the smoke particles gather into large particles. The drainage channel 2214 is connected to the negative pressure gas source, and the several low-pressure areas arranged through the negative pressure suction holes 211 make the smoke generated by welding be affected by the pressure difference in the low-altitude area and diffuse to the surrounding area, thereby avoiding smoke aggregation and preventing the generation of large particles in the welding area. When the top suction hood 21 is connected to the negative pressure gas source, the smoke generated by welding is affected by the pressure difference in the low-altitude area and diffuses to the surrounding area, thereby avoiding smoke aggregation and preventing the generation of large particles in the welding area. When the hood 21 rotates, due to the negative pressure suction hole 211 axially arranged in the inner cavity of the top suction hood 21, the inner cavity as a whole tends to the negative pressure zone. Under the action of the pressure difference, the smoke generated by welding flows directly in the circumferential direction and is enriched through the negative pressure suction hole 211, and does not flow upward in a laminar state; by arranging an air compression plate 223 at the inlet of the negative pressure suction hole 211 and arranging it at an angle, when the top suction hood 21 rotates, part of the air is pressed toward the negative pressure suction hole 211, and the radial flow efficiency of the smoke at the welding point is improved by increasing the pressure difference.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A PCB soldering device with a smoke removal function, the soldering device being used for soldering PCBs, characterized in that: The welding device comprises a housing (1), a collecting device (2), a temperature regulating device (3) and a driving device (4); the housing (1) is provided with a working chamber (11); the collecting device (2) and the temperature regulating device (3) are placed in the working chamber (11); the collecting device (2) and the temperature regulating device (3) are connected by pipes; the driving device (4) is connected to the housing (1); the driving device (4) and the collecting device (2) are tightly connected; the collecting device (2) is used to disperse smoke generated by welding a PCB board; The collecting device (2) comprises a top suction cover (21) and a guide assembly (22), and the guide assembly (22) comprises a guide seat (221); The guide assembly (22) further includes a rotary motor (222), a transmission cavity (2215) is provided on the guide seat (221), the guide seat (221) is placed in the transmission cavity (2215), a transmission gear is provided at the output end of the guide seat (221), an external tooth surface (212) is provided on the top suction cover (21), and the output end of the guide seat (221) is meshed with the external tooth surface (212) via the transmission gear; The top suction cover (21) is provided with a plurality of negative pressure suction holes (211), and the inlets of the negative pressure suction holes (211) face the soldering points of the PCB board; The guide assembly (22) further includes a plurality of air-compression plates (223), the air-compression plates (223) being fastened to the top suction cover (21), the air-compression plates (223) being located at the inlet of the negative pressure suction hole (211), and the air-compression plates (223) being arranged obliquely; The temperature regulating device (3) comprises a first hot air pipe (31), a plurality of air supply channels (213) are provided on the top suction cover (21), an outlet of the first hot air pipe (31) is connected to the air supply channel (213), and the outlets of the plurality of air supply channels (213) are arranged toward the welding point; The driving device (4) includes a driving module (41) and a welding head (42), the driving module (41) and the working chamber (11) are tightly connected, the driving module (41) is a cross module, and the output end of the driving module (41) is tightly connected to the welding head (42) and the capturing device (2) respectively; The top suction cover (21) and the guide assembly (22) are movably connected, the guide seat (221) and the output end of the driving module (41) are tightly connected, a rotary groove (2213) is provided on the guide seat (221), the top suction cover (21) and the rotary groove (2213) are rotatably connected, the lower end of the welding head (42) passes through the top suction cover (21), the guide seat (221) is provided with a drainage channel (2214), and the end of the negative pressure suction hole (211) is connected to the drainage channel (2214) pipeline; The drainage channel (2214) is arranged in a ring shape, and the capture device (2) further comprises a filter (24). The outlet of the drainage channel (2214) is connected to a negative pressure gas source via the filter (24).

2. The PCB soldering device with smoke removal function according to claim 1, characterized in that: The capture device (2) further comprises a sensing component (23), the sensing component (23) comprising a light emitting plate (231) and a mounting plate (232), the light emitting plate (231) and the mounting plate (232) being arranged through the middle of the top suction cover (21), one side of the light emitting plate (231) and the mounting plate (232) being respectively fastened to the inner wall of the top suction cover (21), a photosensitive layer (233) being provided on the side of the mounting plate (232) away from the inner wall of the top suction cover (21), two electrode sheets (234) being provided on the photosensitive layer (233), the light emitting direction of the light emitting plate (231) being towards the photosensitive layer (233), and the two electrode sheets (234) being respectively electrically connected to two wiring terminals of a photosensitive power supply to form a photosensitive circuit.

3. The PCB soldering device with smoke removal function according to claim 2, characterized in that: The rotary motor (222) is electrically connected to the photosensitive circuit.

4. The PCB soldering device with smoke removal function according to claim 3, characterized in that: The temperature regulating device (3) further comprises a second hot air pipe (32) and a cooling air pipe (33); a preheating chamber (2211) and a cooling chamber (2212) are provided on the guide seat (221); the second hot air pipe (32) and the preheating chamber (2211) are connected by pipes; the cooling air pipe (33) and the cooling chamber (2212) are connected by pipes; the preheating chamber (2211) and the cooling chamber (2212) are opened downward on one side.

5. The PCB soldering device with smoke removal function according to claim 4, characterized in that: The driving device (4) further comprises a conveyor (43) and a carrier plate (44); the conveyor (43) is tightly connected to the housing (1); a plurality of carrier plates (44) are provided on the conveyor (43); and the carrier plates (44) are used to clamp the PCB board.

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