Environment-friendly PCB cleaning and drying device

Abstract

The utility model discloses an environment-friendly PCB cleaning and drying device which comprises a drying device body, a power roller conveyor penetrates through and is fixedly connected to the drying device body, the drying device body comprises a pre-cleaning box body, and the right side of the pre-cleaning box body is fixedly connected with a cleaning agent box body. And the right side of the cleaning agent box body is fixedly connected with a clear water box body. The dry ice spraying mechanisms are arranged on the upper side and the lower side in the pre-cleaning box body, and particularly, the spray head support is in precise transmission connection with the direct current motor through the lead screw nut, so that precise positioning and movement control of the dry ice spray head are achieved. By means of the design, the spraying uniformity and coverage of the dry ice are guaranteed, the cleaning efficiency is greatly improved, and it is guaranteed that pollutants on the surface of the PCB are rapidly removed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning and drying devices, and in particular relates to an environmentally friendly PCB circuit board cleaning and drying device. Background Art

[0002] In the field of electronic manufacturing, with the continuous advancement of technology and the improvement of environmental awareness, the cleaning and drying process of PCB (printed circuit board) has become a key link to ensure the reliability of electronic products and environmental sustainability. Traditional PCB cleaning methods mostly use chemical solvents. Although they can effectively remove welding residues and pollutants, they are highly volatile and easily cause environmental pollution and health risks to operators. In recent years, environmentally friendly cleaning technologies have gradually emerged, such as water-based cleaning and ultrasonic cleaning, aiming to reduce the use of harmful substances and reduce the impact on the environment.

[0003] Although the above-mentioned environmentally friendly cleaning technologies have made some progress, there are still some shortcomings. Although water-based cleaning is more environmentally friendly, it has limited ability to remove some stubborn stains. Ultrasonic cleaning is highly efficient, but the equipment cost is expensive and the energy consumption is large. In addition, the cleaning machine in the prior art lacks a pre-cleaning mechanism, which makes the amount of cleaning agent used too large. Therefore, we propose an environmentally friendly PCB circuit board cleaning and drying device. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide an environmentally friendly PCB circuit board cleaning and drying device. By providing a pre-cleaning dry ice spraying mechanism, the difficulty of cleaning in subsequent steps can be reduced, thereby reducing the amount of cleaning agent used, thereby achieving energy-saving and environmental protection.

[0005] The utility model is implemented as follows: an environmentally friendly PCB circuit board cleaning and drying device comprises a drying device main body, the drying device main body penetrates and is fixedly connected with a powered roller conveyor, the drying device main body comprises a pre-cleaning box, the right side of the pre-cleaning box is fixedly connected with a cleaning agent box, the right side of the cleaning agent box is fixedly connected with a clean water box, the right side of the clean water box is fixedly connected with a drying box, a dry ice spraying mechanism is respectively installed on the upper and lower sides of the interior of the pre-cleaning box, the dry ice spraying mechanism comprises a nozzle bracket, the left and right sides of the nozzle bracket are respectively fixedly connected with a sleeve, a smooth rod is inserted into the interior of the sleeve, the front end and the rear end of the smooth rod are respectively fixedly connected to the inner wall of the pre-cleaning box, a dry ice nozzle is fixedly connected to the lower part of the nozzle bracket, a DC motor is fixedly connected to the rear side of the pre-cleaning box, and the output shaft of the DC motor is transmission-connected to the nozzle bracket through a screw rod.

[0006] Optionally, an air distribution pipe is fixedly connected to the rear side of the pre-cleaning box, a dry ice joint is provided on the air distribution pipe, a through hole is opened on the nozzle bracket, and the upper part of the dry ice nozzle is connected to the air distribution pipe through an elastic hose.

[0007] Optionally, a first water distributor is fixedly connected to the interior of the detergent box, a cleaning solution storage box is provided on the rear side of the detergent box, a water pump is installed on the cleaning solution storage box, the water pump is connected to the first water distributor through a first connecting pipe, and the first water distributor is connected to a plurality of cleaning agent nozzles.

[0008] Optionally, a water outlet is provided at the lower portion of the cleaning agent box, and the water outlet is connected to the interior of the cleaning solution storage box through a return pipe.

[0009] Optionally, a second water distributor is fixedly connected to the interior of the clean water tank, and a plurality of clean water nozzles are connected to the second water distributor.

[0010] Optionally, an obliquely installed wind knife is provided on the upper inner side of the drying box, and a plurality of heating rods are fixedly connected to the lower inner side of the drying box.

[0011] Optionally, the upper parts of the drying device body and the cleaning solution storage box are provided with covers, the lower part of the pre-cleaning box is provided with an ash storage trough, and the lower part of the ash storage trough is detachably connected with a cover plate.

[0012] Optionally, rectangular through holes are respectively provided on the left and right sides of the pre-cleaning box, the cleaning agent box, the clean water box and the drying box, and observation windows are provided on the cleaning agent box, the clean water box and the drying box.

[0013] Optionally, drainage pipes are provided at the bottom of the detergent box, the clean water box and the drying box.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By installing dry ice spraying mechanisms on the upper and lower sides of the pre-cleaning box, especially by using the precise transmission connection between the nozzle bracket and the DC motor through the screw nut, the precise positioning and movement control of the dry ice nozzle is achieved. This design not only ensures the uniformity and coverage of dry ice spraying, but also greatly improves the cleaning efficiency and ensures the rapid removal of pollutants on the surface of the PCB board. The forward and backward movement of the barrel to spray significantly reduces the consumption of dry ice, while avoiding the problems of local over-cleaning or incomplete cleaning that may exist in traditional dry ice cleaning, improving environmental protection and cleaning quality.

[0016] 2. A first water distributor is set in the cleaning agent box, and a closed circulation system is formed with the cleaning solution storage box through a water pump and a first connecting pipe. This design not only realizes the efficient use of cleaning agents, but also ensures the effective recovery and treatment of wastewater during the cleaning process through the setting of the water outlet and the return pipe, reducing resource waste and environmental pollution. This step significantly reduces production costs by recycling the cleaning solution, while maintaining the consistency and high quality of the cleaning effect, meeting the dual goals of environmental protection and economic benefits.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram provided by the utility model;

[0019] Figure 2 It is an internal schematic diagram provided by the utility model;

[0020] Figure 3 This is a schematic diagram of a cleaning agent box provided by the utility model;

[0021] Figure 4 It is a schematic diagram of the clean water tank provided by the utility model;

[0022] Figure 5 It is a schematic diagram of a cleaning agent box and a cleaning solution storage box provided by the utility model;

[0023] Figure 6 It is a schematic diagram of a cleaning agent box and a dry ice spraying mechanism provided by the utility model;

[0024] Figure 7 This is a schematic diagram of the dry ice spraying mechanism provided by the utility model from a first perspective;

[0025] Figure 8 This is a schematic diagram of the dry ice spraying mechanism provided by the utility model from a second viewing angle.

[0026] In the figure: 1. cover; 2. air knife; 3. pre-cleaning box; 4. cleaning agent box; 5. clean water box; 6. drying box; 7. cleaning solution storage box; 8. power roller conveyor; 9. dry ice spraying mechanism; 91. nozzle bracket; 92. smooth rod; 93. dry ice nozzle; 94. screw rod; 95. DC motor; 96. elastic hose; 97. air distribution pipe; 98. sleeve; 10. heating rod; 11. first water distributor; 12. cleaning agent nozzle; 13. water outlet; 14. second water distributor; 15. clean water nozzle; 16. first connecting pipe; 17. water pump; 18. return pipe; 19. ash storage tank. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 8 As shown, an environmentally friendly PCB circuit board cleaning and drying device is provided in an embodiment of the utility model.

[0029] It includes a drying device body, which is penetrated by and fixedly connected with a powered roller conveyor 8. The drying device body includes a pre-cleaning box 3, a cleaning agent box 4 is fixedly connected to the right side of the pre-cleaning box 3, a clean water box 5 is fixedly connected to the right side of the cleaning agent box 4, and a drying box 6 is fixedly connected to the right side of the clean water box 5. Dry ice spraying mechanisms 9 are respectively installed on the upper and lower sides of the interior of the pre-cleaning box 3. The dry ice spraying mechanism 9 includes a nozzle bracket 91, and sleeves 98 are respectively fixedly connected to the left and right sides of the nozzle bracket 91. A smooth rod 92 is inserted into the sleeve 98, and the front and rear ends of the smooth rod 92 are respectively fixedly connected to the inner wall of the pre-cleaning box 3. A dry ice nozzle 93 is fixedly connected to the lower part of the nozzle bracket 91, and a DC motor 95 is fixedly connected to the rear side of the pre-cleaning box 3. The output shaft of the DC motor 95 is transmission-connected to the nozzle bracket 91 through a screw rod 94.

[0030] An air distribution pipe 97 is fixedly connected to the rear side of the pre-cleaning box 3 , a dry ice joint is provided on the air distribution pipe 97 , a through hole is opened on the nozzle bracket 91 , and the upper part of the dry ice nozzle 93 is connected to the air distribution pipe 97 through an elastic hose 96 .

[0031] A first water distributor 11 is fixedly connected to the interior of the cleaning agent box 4, and a cleaning solution storage box 7 is provided on the rear side of the cleaning agent box 4. A water pump 17 is installed on the cleaning solution storage box 7. The water pump 17 is connected to the first water distributor 11 through a first connecting pipe 16. The first water distributor 11 is connected to a plurality of cleaning agent nozzles 12.

[0032] A water outlet 13 is provided at the lower portion of the cleaning agent box 4 , and the water outlet 13 is communicated with the interior of the cleaning solution storage box 7 through a return pipe 18 .

[0033] A second water distributor 14 is fixedly connected to the interior of the clean water tank 5 , and a plurality of clean water nozzles 15 are connected to the second water distributor 14 .

[0034] An obliquely installed wind knife 2 is provided on the upper inner side of the drying box body 6 , and a plurality of heating rods 10 are fixedly connected to the lower inner side of the drying box body 6 .

[0035] A cover 1 is provided on the upper part of the drying device body and the cleaning solution storage box 7, and an ash storage tank 19 is provided on the lower part of the pre-cleaning box 3. A cover plate is detachably connected to the lower part of the ash storage tank 19.

[0036] Rectangular through holes are respectively provided on the left and right sides of the pre-cleaning box 3 , the cleaning agent box 4 , the clean water box 5 and the drying box 6 , and observation windows are provided on the cleaning agent box 4 , the clean water box 5 and the drying box 6 .

[0037] The lower parts of the cleaning agent box 4, the clean water box 5 and the drying box 6 are all provided with drainage pipes.

[0038] The dry ice spraying mechanism 9 is connected to the DC motor 95 through a precise transmission of the screw 94, ensuring that the nozzle bracket 91 and the dry ice nozzle 93 below it can achieve precise and controllable movement in the pre-cleaning box 3. This design not only optimizes the use efficiency of dry ice and reduces resource waste, but also effectively removes pollutants on the surface of the circuit board through uniform coverage of dry ice, avoiding damage that may be caused by traditional cleaning methods, such as the risk of short circuits caused by chemical residues or water stains. Compared with traditional chemical solvents, the use of dry ice significantly reduces the environmental burden and meets the requirements of green manufacturing.

[0039] The first water distributor 11 in the cleaning agent box 4 and the cleaning solution storage box 7 form a circulation system through the water pump 17 and the first connecting pipe 16, which realizes the recovery and reuse of the cleaning agent. This design not only reduces the consumption of cleaning agents and reduces production costs, but also ensures the continuity and cleanliness of the cleaning process through the arrangement of the water outlet 13 and the return pipe 18, and avoids the pollution of wastewater discharge to the environment. The design of the circulation system is a major innovation of the present invention, which embodies the idea of ​​improving the recycling rate of resources under the premise of environmental protection.

[0040] The combination of the obliquely installed wind knife 2 and the heating rod 10 in the drying box 6 realizes efficient drying of the cleaned PCB board. The design of the oblique wind knife 2 helps the air flow to contact the surface of the circuit board more evenly and accelerate the evaporation of water, while the heating rod 10 improves the drying efficiency, shortens the drying cycle, and reduces energy consumption. This drying strategy not only avoids potential electrical problems caused by the circuit board getting damp, but also ensures high efficiency and energy saving in the drying process, which reflects a significant improvement on traditional drying technology.

[0041] Through the innovative design of the above key steps, the utility model has not only achieved substantial breakthroughs in environmental protection, efficiency and cost control, but also enhanced the practicality and maintenance convenience of the equipment through the optimization of details, such as the design of the observation window, the drain pipe and the ash storage tank 19. The overall solution shows an effective solution to the bottleneck of the existing technology, such as solving the problem of cleaning agent waste through the recycling system, improving the environmental protection and accuracy of cleaning through the dry ice spraying mechanism 9, and shortening the production cycle through the efficient drying mechanism, thereby providing an advanced comprehensive solution in the field of PCB cleaning and drying, which has significant industry promotion value and environmental benefits.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly PCB circuit board cleaning and drying device, comprising a drying device body, characterized in that: A powered roller conveyor (8) is passed through and fixedly connected to the main body of the drying device. The main body of the drying device comprises a pre-cleaning box (3). The right side of the pre-cleaning box (3) is fixedly connected to a cleaning agent box (4). The right side of the cleaning agent box (4) is fixedly connected to a clean water box (5). The right side of the clean water box (5) is fixedly connected to a drying box (6). Dry ice spraying mechanisms (9) are respectively installed on the upper and lower sides of the interior of the pre-cleaning box (3). The dry ice spraying mechanism (9) comprises a nozzle bracket (91 ), the left and right sides of the nozzle bracket (91) are respectively fixedly connected with sleeves (98), the interior of the sleeve (98) is plugged with a smooth rod (92), the front and rear ends of the smooth rod (92) are respectively fixedly connected to the inner wall of the pre-cleaning box (3), the lower part of the nozzle bracket (91) is fixedly connected with a dry ice nozzle (93), the rear side of the pre-cleaning box (3) is fixedly connected with a DC motor (95), and the output shaft of the DC motor (95) is transmission-connected to the nozzle bracket (91) through a screw rod (94).

2. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1 is characterized in that: An air distribution pipe (97) is fixedly connected to the rear side of the pre-cleaning box (3), a dry ice joint is provided on the air distribution pipe (97), a through hole is provided on the nozzle bracket (91), and the upper part of the dry ice nozzle (93) is connected to the air distribution pipe (97) via an elastic hose (96).

3. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1 is characterized in that: A first water distributor (11) is fixedly connected to the interior of the cleaning agent box (4), a cleaning solution storage box (7) is provided on the rear side of the cleaning agent box (4), a water pump (17) is installed on the cleaning solution storage box (7), and the water pump (17) is connected to the first water distributor (11) through a first connecting pipe (16), and the first water distributor (11) is connected to a plurality of cleaning agent nozzles (12).

4. The environmentally friendly PCB circuit board cleaning and drying device according to claim 3 is characterized in that: A water outlet (13) is provided at the lower part of the cleaning agent box (4), and the water outlet (13) is communicated with the interior of the cleaning solution storage box (7) through a return pipe (18).

5. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1 is characterized in that: A second water distributor (14) is fixedly connected to the interior of the clean water tank (5), and a plurality of clean water nozzles (15) are connected to the second water distributor (14).

6. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1 is characterized in that: An obliquely installed wind knife (2) is provided on the upper inner side of the drying box (6), and a plurality of heating rods (10) are fixedly connected to the lower inner side of the drying box (6).

7. The environmentally friendly PCB circuit board cleaning and drying device according to claim 3 is characterized by: The upper part of the drying device body and the cleaning solution storage box (7) is provided with a cover (1), the lower part of the pre-cleaning box (3) is provided with an ash storage tank (19), and the lower part of the ash storage tank (19) is detachably connected with a cover plate.

8. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1 is characterized in that: The left and right sides of the pre-cleaning box (3), the cleaning agent box (4), the clean water box (5) and the drying box (6) are respectively provided with rectangular through holes, and the cleaning agent box (4), the clean water box (5) and the drying box (6) are provided with observation windows.

9. The environmentally friendly PCB circuit board cleaning and drying device according to claim 1, characterized in that: Drain pipes are provided at the bottom of the cleaning agent box (4), the clean water box (5) and the drying box (6).

Images