Testing device for cleaning residual ions of circuit board

Abstract

The utility model relates to a testing device for cleaning residual ions of a circuit board, which belongs to the technical field of ion testing and comprises an IPA extraction device, a hot water cleaning tank is arranged at one end of the IPA extraction device, and a liquid medicine cleaning tank is arranged at one end, far away from the IPA extraction device, of the hot water cleaning tank. Rubber roller rows used for conveying PCB sample plates are rotationally connected into the liquid medicine cleaning box and the hot water cleaning box, ultrasonic oscillators are arranged in the liquid medicine cleaning box and the hot water cleaning box, and heaters are arranged at the bottoms in the liquid medicine cleaning box and the hot water cleaning box. According to the invention, the cleaning strength of the laboratory is closer to the condition of the PCB on site, secondary pollution can be prevented, the accuracy of the residual quantity of PCB ions is improved, and the laboratory result is closer to the field test, so that a reference can be provided for the cleaning of the PCB on the actual site.

Description

Technical Field

[0001] The present application relates to the technical field of ion testing, and in particular to a test device for cleaning residual ions of a circuit board. Background Art

[0002] With the rapid development of the PCB industry, the integration and component density of electronic products are getting higher and higher. The traditional surface cleaning standards can no longer meet the requirements of existing products. Therefore, ion contamination testing and ion residue testing have become new cleaning standards. The degree of ion residue directly affects the transmission of electrical signals. Ion migration will occur during use, and more seriously, it will cause short circuit and burning of the PCB board. It is necessary to test and clean the PCB sample before actual application. The test standard is IPC-TM-6502.3.28.

[0003] At present, in the process of testing the cleaning of PCB samples, the existing laboratory equipment is difficult to simulate the on-site usage. In the cleaning stage, a beaker is used for immersion cleaning test. The transfer test board is manually placed in another hot water beaker, and the heat energy supplied by the hot water is used for water washing. Finally, it is blown dry and ion chromatography is performed. The test results are used as a reference standard after the actual cleaning of the entire PCB board to determine whether the entire PCB board is clean.

[0004] However, the above-mentioned related technologies have the following problems: when conducting ion contamination tests, the cleaning strength of the test samples is insufficient, and the actual cleaning condition of the entire PCB board cannot be simulated. The amount of residual ions on the surface of the PCB sample is large. The value detected when the ion residual degree is detected after IPA extraction is inaccurate, and it is impossible to provide a reference for the actual ion residual degree of the entire PCB board after cleaning. Therefore, the simulation results in the laboratory are difficult to provide a reference for the on-site cleaning test of the PCB board. Utility Model Content

[0005] In order to address the deficiencies in the prior art, the present application provides a test device for residual ion cleaning of circuit boards, so that the intensity of laboratory cleaning is closer to the situation of PCB boards on site, and can prevent secondary contamination, improve the accuracy of residual ions on PCB boards, and make laboratory results closer to on-site tests, thereby providing a reference for the cleaning of actual on-site PCB boards.

[0006] The present application provides a test device for residual ion cleaning of a circuit board using the following technical solution:

[0007] A test device for residual ion cleaning of a circuit board comprises an IPA extraction device, a hot water cleaning tank is arranged at one end of the IPA extraction device, a chemical cleaning tank is arranged at one end of the hot water cleaning tank away from the IPA extraction device, a rubber roller row for conveying PCB samples is rotatably connected in the chemical cleaning tank and the hot water cleaning tank, an ultrasonic oscillator is arranged in the chemical cleaning tank and the hot water cleaning tank, and a heater is arranged at the bottom of the chemical cleaning tank and the hot water cleaning tank.

[0008] By adopting the above technical solution, before the PCB sample enters the IPA extraction device for ion residue detection, it is immersed in the chemical cleaning tank and the hot water cleaning tank, and double cleaned by the ultrasonic oscillator in the two cleaning tanks. Through the cavitation effect, the liquid has a huge impact force on the surface of the PCB sample, achieving the effect of mechanical cleaning, reducing the residual amount of ions after cleaning, making the laboratory test closer to the on-site cleaning situation, and the parameters of the ion residue obtained in the IPA extraction test are more accurate.

[0009] The present application further arranges: a drying box is arranged at one end of the hot water cleaning box away from the chemical cleaning box, the rubber roller row is rotatably connected to the inside of the drying box, hot air blowing pipes are arranged on the top and bottom of the drying box, and the output end of the hot air blowing pipe faces the rubber roller row.

[0010] By adopting the above technical solution, the hot air blow pipe can dry the liquid and hot water on the surface of the PCB sample between the rubber roller rows, reducing the liquid residue, and the ion residue parameters obtained by extracting the PCB sample with IPA liquid are more accurate.

[0011] The present application further provides: the IPA extraction device includes an extraction box, the extraction box is fixedly connected to one end of the drying box away from the hot water washing box, a support frame is provided at the bottom of the extraction box, a turntable is rotatably connected to the top of the support frame, a test tube is arranged in a ring on the top of the turntable, and a plurality of test tubes are provided.

[0012] By adopting the above technical solution, the turntable rotates so that each PCB sample leaving the drying box enters each test tube accordingly, so that multiple PCB samples can be extracted in the test tubes, and the extraction rate of multiple PCB samples can be improved, so that the ion residue parameters of multiple samples can be obtained more quickly and the average value can be calculated, so as to obtain more accurate ion residue parameters.

[0013] The present application further provides: the IPA extraction device also includes a feed box, which is arranged at one end of the extraction box away from the drying box, and an IPA reagent barrel and a water bucket are arranged in the feed box, and the outlet of the IPA reagent barrel and the outlet of the water bucket are both provided with feed branch pipes, one end of the feed branch pipe is provided with a water valve, and the other end of the feed branch pipe is provided with a feed main pipe, and the feed main pipe is away from the end of the feed branch pipe toward the opening of a test tube, and a feed control panel for adjusting the mixing ratio of IPA and water is provided on the outer surface of the feed box, and the feed control panel is electrically connected to the water valve.

[0014] By adopting the above technical solution, IPA and water are mixed in the feed main pipe, and the feed control panel controls the opening or closing of the water valve to control the amount of IPA and water entering the feed main pipe, thereby adjusting the mixing ratio of IPA and water.

[0015] The present application further arranges: the chemical solution cleaning box and the hot water cleaning box are provided with a first conveying box, a second conveying box is provided between the hot water cleaning box and the drying box, the rubber roller row is rotatably connected in the first conveying box and the second conveying box, and the outer walls of the first conveying box and the second conveying box are provided with transparent plates.

[0016] By adopting the above technical solution, the secondary contamination of the board surface caused by dirty gloves or not wearing gloves can be avoided as much as possible when transferring the PCB samples in the closed transfer box, thereby making the parameters of the ion residue more accurate, and the transmission of the PCB samples can be observed from the outside through the transparent plate, reducing the possibility of accidents.

[0017] The present application further arranges: a tilting platform is provided at one end of the rubber roller row inside the drying box near the extraction box, a pressure sensor is provided at the top of the tilting platform away from the turntable, the pressure sensor is electrically connected to the turntable, the tilting platform is recessed at one end near the extraction box to form an abutment groove that is compatible with the turntable, the turntable abuts against the side wall of the abutment groove, a suction fan is provided on the top of the support frame, and the suction end of the suction fan faces the tilting platform.

[0018] By adopting the above technical solution, the pressure sensor rotates the empty test tube of the turntable close to the tilting table when detecting the gravity of the PCB sample, thereby improving the efficiency of the PCB sample entering the empty test tube. The tilting table enables the PCB sample to enter the top of the turntable more smoothly, and the suction fan can accelerate the PCB sample to the test tube opening and fall into the test tube.

[0019] The present application further provides that: a limit block is arranged on the top of the turntable between every two test tubes, the top surfaces of the multiple test tubes are in the same horizontal plane as the top surface of the turntable, and the two sides of the limit block abut against the outer sides of the top surfaces of the test tubes.

[0020] By adopting the above technical solution, when the suction fan sucks the PCB sample, the limit block can reduce the deviation of the PCB sample when it moves, and the PCB sample can fall into the test tube more accurately.

[0021] The present application further provides that: both ends of the first conveying box and the second conveying box are rotatably connected with water absorption rollers.

[0022] By adopting the above technical solution, the water-absorbing roller can reduce the amount of liquid on the surface of the PCB sample when it enters the first conveyor box, and reduce the amount of hot water on the surface when it enters the second conveyor box. At the same time, it can block some liquid splashed from the liquid cleaning box and the hot water cleaning box from entering the conveyor line, thereby reducing the impact of the liquid on the detection of ion residues.

[0023] The present application further provides that: the outer surface of the rubber rollers in the rubber roller row in the chemical solution cleaning box and the hot water cleaning box is provided with spoke wheels, and there are multiple spoke wheels, and the multiple spoke wheels are arranged at equal intervals along the extension direction of the rubber rollers.

[0024] By adopting the above technical solution, the stirring of the medicine and hot water can be strengthened. When the vacuum bubbles generated by the stirring burst, the generated energy is evenly distributed and diffused into the medicine and hot water, making the temperature distribution of the medicine and hot water heated by the heater more uniform.

[0025] The present application further provides that: the outer surfaces of the chemical cleaning tank and the hot water cleaning tank are provided with a switch control panel for controlling the ultrasonic oscillator and the heater;

[0026] And / or, a hot air control panel for controlling the hot air blowing pipe is provided on the outer surface of the drying box.

[0027] By adopting the above technical solution, the start and pause of the ultrasonic oscillator and the heater can be controlled, and the start, pause and output power of the hot air blower can be controlled to adjust the cleaning degree of the PCB sample under different conditions, so as to adapt it to the actual cleaning environment of on-site cleaning as much as possible, so that the value of ion residue is more referenceable.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. The PCB samples in this application are double cleaned by immersion and ultrasonic cleaning in a chemical cleaning box and a hot water cleaning box. The cavitation effect causes the liquid to exert a huge impact force on the surface of the PCB sample, thereby achieving a mechanical cleaning effect. When the PCB sample enters the IPA extraction device, the surface ions can be reduced, thereby improving the cleaning effect and making the laboratory test closer to the on-site cleaning situation.

[0030] 2. In the present application, the spoke wheels on the surface of the rubber roller row in the liquid cleaning box and the hot water cleaning box can stir the liquid and hot water. The energy generated when the vacuum bubbles burst is evenly distributed and diffused into the liquid and hot water, making the temperature of the liquid and hot water more uniform, thereby improving the cleaning effect.

[0031] 3. In the present application, the PCB samples are transferred between the closed first transfer box and the second transfer box, which can reduce the secondary contamination of the board surface caused by dirty gloves or not wearing gloves, thereby improving the accuracy of laboratory results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of this application.

[0033] Figure 2 It is a schematic cross-sectional view of the entire application.

[0034] Figure 3 It is a schematic diagram of the internal structure of the liquid cleaning box and the hot water cleaning box of the present application.

[0035] Figure 4 This application Figure 2 Schematic diagram of the locally enlarged structure of A in the middle.

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the extraction box in this application.

[0037] Figure 6 It is a schematic diagram of the structure in the feed box in this application.

[0038] Figure numerals: 1. IPA extraction device; 100. extraction box; 101. support frame; 102. turntable; 103. test tube; 104. feed box; 105. IPA reagent barrel; 106. water bucket; 107. feed branch pipe; 108. water valve; 109. feed main pipe; 110. feed control panel; 111. suction fan; 112. limit block; 2. hot water cleaning box; 3. chemical cleaning box; 4. rubber roller row; 400. spoke wheel; 5. ultrasonic oscillator; 6. heater; 7. drying box; 700. hot air blowing pipe; 701. tilting table; 702. pressure sensor; 703. abutment groove; 8. first conveying box; 9. second conveying box; 10. transparent plate; 11. water suction roller; 12. switch control panel; 13. hot air control panel. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1 to 6 This application is described in further detail.

[0040] refer to Figures 1 to 3In this embodiment, a test device for cleaning residual ions of a circuit board includes an IPA extraction device 1. The IPA extraction device 1 is used to detect the residual ions of a PCB sample after cleaning. A hot water cleaning tank 2 is provided at one end of the IPA extraction device 1. A liquid medicine cleaning tank 3 is provided at the end of the hot water cleaning tank 2 away from the IPA extraction device 1. When the PCB sample enters the cleaning procedure, it first enters the liquid medicine cleaning tank 3 to be rinsed and cleaned with liquid medicine, and then enters the hot water cleaning tank 2 to clean the liquid medicine remaining on the PCB sample, and further cleans the ions on the surface of the PCB sample. The liquid medicine cleaning tank 3 and A rubber roller row 4 is rotatably connected in the hot water cleaning tank 2, and the rubber roller row 4 is used to convey the PCB sample. An ultrasonic oscillator 5 is fixedly connected in the chemical cleaning tank 3 and the hot water cleaning tank 2. A heater 6 is fixedly connected to the bottom of the chemical cleaning tank 3 and the hot water cleaning tank 2. The ultrasonic oscillator 5 can cause the liquid in the chemical cleaning tank 3 and the hot water cleaning tank 2 to oscillate and produce a cavitation effect, thereby causing the chemical solution and hot water to produce a huge impact force on the surface of the PCB sample, so as to achieve the effect of mechanical cleaning, improve the cleaning degree of the PCB sample in the laboratory, and thus be able to be closer to the cleaning condition of the entire PCB on site.

[0041] refer to Figure 2 and Figure 4 In this embodiment, a drying box 7 is provided at one end of the hot water cleaning box 2 away from the chemical cleaning box 3, and the rubber roller row 4 is rotatably connected to the inside of the drying box 7. The top and bottom of the drying box 7 are fixedly connected with a hot air blowing pipe 700, and the output end of the hot air blowing pipe 700 faces the rubber roller row 4, so that the residual chemical solution and hot water on the surface of the PCB sample between the rubber roller rows 4 are dried, reducing the influence of the chemical solution and hot water on the ion residual detection, so that the ion residual parameter of the PCB sample obtained by IPA chemical solution extraction is more accurate.

[0042] refer to Figure 1 , Figure 5 and Figure 6 In this embodiment, the IPA extraction device 1 includes an extraction box 100, which is fixedly connected to the end of the drying box 7 away from the hot water washing box 2. A support frame 101 is fixedly connected to the bottom of the extraction box 100, and a turntable 102 is rotatably connected to the top of the support frame 101. A test tube 103 is arranged on the top of the turntable 102. There are multiple test tubes 103. When the turntable 102 rotates, each PCB sample leaving the drying box 7 can enter a corresponding test tube 103, so that the extraction of multiple PCB samples leaving the drying box 7 is realized, and the rate of obtaining multiple ion residues is improved, so as to calculate the average value of the ion residues more quickly to improve the accuracy of the ion residue reference value.

[0043] Furthermore, the IPA extraction device 1 further comprises a feed box 104, which is arranged at one end of the extraction box 100 away from the drying box 7, and an IPA reagent barrel 105 and a water barrel 106 are fixedly connected in the feed box 104, and the outlet of the IPA reagent barrel 105 and the outlet of the water barrel 106 are both fixedly connected with a feed branch pipe 107, one end of the feed branch pipe 107 is fixedly connected with a water valve 108, and the other end of the feed branch pipe 107 is fixedly connected with a feed main pipe 109, and IPA and water enter from their respective feed branch pipes 107. The mixed materials are fed into the feed main pipe 109, and mixing occurs in the feed main pipe 109. One end of the feed main pipe 109 away from the feed branch pipe 107 faces the opening of a test tube 103, so that the mixed IPA can enter the test tube 103 more accurately from the feed main pipe 109. A feed control panel 110 is fixedly connected to the outer surface of the feed box 104. The feed control panel 110 is electrically connected to the water valve 108. The feed control panel 110 can control the opening or closing of the water valve 108 to adjust the mixing ratio of IPA and water.

[0044] refer to Figures 1 to 3 In this embodiment, the liquid cleaning box 3 and the hot water cleaning box 2 are fixedly connected with a first conveying box 8, and the hot water cleaning box 2 and the drying box 7 are fixedly connected with a second conveying box 9. The rubber roller row 4 is rotatably connected to the first conveying box 8 and the second conveying box 9. The outer walls of the first conveying box 8 and the second conveying box 9 are fixedly connected with a transparent plate 10. In this embodiment, the transparent plate 10 is selected as an acrylic plate, and the transmission of the PCB sample can be observed across the transparent plate 10 to avoid accidents as much as possible. During operation, the PCB sample after immersion and cleaning in the liquid cleaning box 3 is transferred to the closed first conveying box 8 through the rubber roller row 4, and then enters the hot water cleaning box 2, and is transferred to the closed second conveying box 9 through the rubber roller row 4, and enters the drying box 7. No human intervention is required during the transmission process, which reduces the secondary contamination of the PCB sample surface caused by dirty gloves or not wearing gloves, so that the detection of the parameters of ion residue is more accurate.

[0045] refer to Figure 2 , Figure 4 and Figure 5In this embodiment, the rubber roller row 4 inside the drying box 7 is integrally formed with a tilting platform 701 at one end close to the extraction box 100, and a pressure sensor 702 is fixedly connected to the top of the tilting platform 701 away from the turntable 102. The pressure sensor 702 is electrically connected to the turntable 102. The tilting platform 701 is concavely formed with an abutment groove 703 at one end close to the extraction box 100. The abutment groove 703 is adapted to the turntable 102, and the turntable 102 abuts against the side wall of the abutment groove 703, thereby reducing the gap at the connection between the tilting platform 701 and the turntable 102, so that the PCB sample is not easily When the tilting platform 701 detects the gravity of the PCB sample, the pressure sensor 702 can send a signal to rotate the turntable 102, and the position of the turntable 102 relative to the next empty test tube 103 is abutted against the abutting groove 703, so that the PCB sample can fall into the empty test tube 103. A suction fan 111 is fixedly connected to the top of the support frame 101, and the suction end of the suction fan 111 faces the tilting platform 701, which can provide power for the movement of the PCB sample toward the opening of the test tube 103, and the PCB sample can enter the inside of the test tube 103 more smoothly.

[0046] Furthermore, a limit block 112 is provided on the top of the turntable 102 between every two test tubes 103. The top surfaces of the multiple test tubes 103 are in the same horizontal plane as the top surface of the turntable 102. The two sides of the limit block 112 are in contact with the outer sides of the top surfaces of the test tubes 103. When the suction fan 111 sucks the PCB sample to the opening of the test tube 103, the PCB sample is guided by the limit block 112 and moves between the two sides of the limit block 112 to enter the test tube 103 more accurately, thereby minimizing the displacement of the PCB sample during movement.

[0047] refer to Figure 2 and Figure 3 In the present embodiment, both ends of the first conveying box 8 and the second conveying box 9 are rotatably connected with a water-absorbing roller 11. In the present embodiment, a sponge is provided on the surface of the water-absorbing roller 11. When the liquid from the chemical cleaning box 3 and the hot water cleaning box 2 splashes to the first conveying box 8 and the second conveying box 9, the water-absorbing roller 11 can absorb part of the liquid, reduce the liquid entering the first conveying box 8 and the second conveying box 9, and at the same time absorb part of the liquid attached to the PCB sample passing through the absorption roller.

[0048] Furthermore, the outer surfaces of the rubber rollers in the rubber roller row 4 in the liquid cleaning tank 3 and the hot water cleaning tank 2 are fixedly connected with spoke wheels 400, and a plurality of spoke wheels 400 are provided. The plurality of spoke wheels 400 are arranged at equal intervals along the extension direction of the rubber rollers, and the spoke wheels 400 stir the liquid medicine and hot water as the rubber rollers rotate. When the vacuum bubbles generated by the stirring liquid burst, the generated energy is evenly distributed and diffused into the liquid medicine and hot water, so that the temperature of the liquid medicine and hot water heated by the heater 6 at the bottom of the liquid cleaning tank 3 and the hot water cleaning tank 2 is evenly distributed.

[0049] refer to Figure 1 and Figure 4 In this embodiment, a switch control panel 12 is fixedly connected to the outer surface of the chemical cleaning box 3 and the hot water cleaning box 2, and the switch control panel 12 is used to control the start and pause of the ultrasonic oscillator 5 and the heater 6; a hot air control panel 13 is provided on the outer surface of the drying box 7, and the hot air control panel 13 is used to control the start, pause and output power of the hot air blowing pipe 700, so as to adjust the cleaning degree of the PCB sample in the laboratory under different conditions.

[0050] The implementation principle of the embodiment of the present application is as follows: the PCB sample is placed in the liquid cleaning box 3, and the switch control panel 12 is started to heat and ultrasonically oscillate the liquid in the liquid cleaning box 3 and the hot water cleaning box 2. After being soaked in the liquid, the PCB sample is conveyed to the hot water cleaning box 2 by the rubber roller row 4 through the first conveying box 8. After being soaked in hot water and ultrasonically oscillated, the PCB sample passes through the rubber roller row 4 through the second conveying box 9 and enters the drying box 7. The hot air blowing pipe 700 in the drying box 7 dries the PCB sample, and then is conveyed by the rubber roller row 4 to fall to the top of the tilting table 701, slides from the top of the tilting table 701 to the top of the waiting turntable 102, and is sucked by the suction fan 111. After moving to the inside of the test tube 103 on both sides of the limit block 112, the turntable 102 rotates the next empty test tube 103 to the direction close to the tilting table 701.

[0051] IPA and water enter the feed main pipe 109 from the feed branch pipe 107 to be mixed through the opening of the water valve 108 controlled by the feed control panel 110, and then flow from the feed main pipe 109 close to the end of the turntable 102 into the test tube 103 on the top of the turntable 102 to achieve the delivery of the extraction liquid.

[0052] The device can better simulate the actual cleaning conditions on site. The experimenter can adjust the concentration of the solution in the solution cleaning box 3 according to the detection of the ion concentration in the IPA extract to test the best cleaning conditions, thereby providing a basis for the actual cleaning conditions on site and avoiding the problem of a large amount of solution waste caused by direct on-site testing.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A test device for residual ion cleaning of a circuit board, characterized in that: The invention comprises an IPA extraction device (1), wherein a hot water cleaning tank (2) is arranged at one end of the IPA extraction device (1), a chemical cleaning tank (3) is arranged at one end of the hot water cleaning tank (2) away from the IPA extraction device (1), a rubber roller row (4) for conveying PCB samples is rotatably connected in the chemical cleaning tank (3) and the hot water cleaning tank (2), an ultrasonic oscillator (5) is arranged in the chemical cleaning tank (3) and the hot water cleaning tank (2), and a heater (6) is arranged at the bottom of the chemical cleaning tank (3) and the hot water cleaning tank (2).

2. A test device for residual ion cleaning of a circuit board according to claim 1, characterized in that: A drying box (7) is arranged at one end of the hot water cleaning box (2) away from the chemical cleaning box (3); the rubber roller row (4) is rotatably connected to the inside of the drying box (7); hot air blowing pipes (700) are arranged at the top and bottom of the drying box (7); the output end of the hot air blowing pipe (700) faces the rubber roller row (4).

3. A test device for residual ion cleaning of a circuit board according to claim 2, characterized in that: The IPA extraction device (1) comprises an extraction box (100), wherein the extraction box (100) is fixedly connected to one end of a drying box (7) away from a hot water washing box (2), a support frame (101) is arranged at the bottom of the extraction box (100), a turntable (102) is rotatably connected to the top of the support frame (101), a test tube (103) is arranged around the top of the turntable (102), and a plurality of the test tubes (103) are arranged.

4. A test device for residual ion cleaning of a circuit board according to claim 3, characterized in that: The IPA extraction device (1) further comprises a feed box (104), wherein the feed box (104) is arranged at one end of the extraction box (100) away from the drying box (7), wherein an IPA reagent barrel (105) and a water barrel (106) are arranged in the feed box (104), wherein the outlet of the IPA reagent barrel (105) and the outlet of the water barrel (106) are both provided with a feed branch pipe (107), wherein one end of the feed branch pipe (107) is provided with a water valve (108), and the other end of the feed branch pipe (107) is provided with a feed main pipe (109), wherein the end of the feed main pipe (109) away from the feed branch pipe (107) faces an opening of a test tube (103), and a feed control panel (110) for adjusting the mixing ratio of IPA and water is arranged on the outer surface of the feed box (104), wherein the feed control panel (110) is electrically connected to the water valve (108).

5. The test device for residual ion cleaning of a circuit board according to claim 2, characterized in that: The chemical cleaning box (3) and the hot water cleaning box (2) are provided with a first conveying box (8); a second conveying box (9) is provided between the hot water cleaning box (2) and the drying box (7); the rubber roller row (4) is rotatably connected to the first conveying box (8) and the second conveying box (9); and the outer walls of the first conveying box (8) and the second conveying box (9) are provided with a transparent plate (10).

6. A test device for residual ion cleaning of a circuit board according to claim 3, characterized in that: An inclined platform (701) is arranged at one end of the rubber roller row (4) inside the drying box (7) close to the extraction box (100); a pressure sensor (702) is arranged at the top of the inclined platform (701) at one end away from the turntable (102); the pressure sensor (702) is electrically connected to the turntable (102); an abutment groove (703) adapted to the turntable (102) is formed in a concave shape at one end of the inclined platform (701) close to the extraction box (100); the turntable (102) abuts against the side wall of the abutment groove (703); a suction fan (111) is arranged at the top of the support frame (101); the suction end of the suction fan (111) faces the inclined platform (701).

7. A test device for residual ion cleaning of a circuit board according to claim 6, characterized in that: A limiting block (112) is provided on the top of the turntable (102) between every two test tubes (103); the top surfaces of the test tubes (103) and the top surface of the turntable (102) are in the same horizontal plane; and two sides of the limiting block (112) abut against the outer sides of the top surfaces of the test tubes (103).

8. The test device for residual ion cleaning of a circuit board according to claim 5, characterized in that: Water absorption rollers (11) are rotatably connected at both ends of the first conveying box (8) and the second conveying box (9).

9. The test device for residual ion cleaning of a circuit board according to claim 1, characterized in that: The outer surfaces of the rubber rollers in the rubber roller row (4) in the chemical cleaning box (3) and the hot water cleaning box (2) are provided with spoke wheels (400), a plurality of the spoke wheels (400) are provided, and the plurality of spoke wheels (400) are arranged at equal intervals along the extension direction of the rubber rollers.

10. The test device for residual ion cleaning of a circuit board according to claim 2, characterized in that: The outer surfaces of the liquid cleaning tank (3) and the hot water cleaning tank (2) are provided with a switch control panel (12) for controlling the ultrasonic oscillator (5) and the heater (6); And / or, a hot air control panel (13) for controlling the hot air blowing pipe (700) is provided on the outer surface of the drying box (7).

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