Integrated filtering system and 3D printer

Abstract

The invention discloses an integrated filtering system and a 3D printer, and relates to the technical field of 3D printing waste gas treatment.The system comprises integrated filtering cylinders, double filtering frames and a dust collecting box which are symmetrically arranged, the system is connected with an air outlet of a printing cavity through a U-shaped pipe, and after large particles are preliminarily separated from waste gas through inertial sedimentation, fine filtering is achieved through a second filtering net. A mechanical linkage driving assembly is innovatively adopted, the opening and closing actions of a side cover synchronously trigger rotary switching of a filter frame, avoiding of a sealing plate and horizontal positioning of a filter screen support, a standby channel is automatically started during single-side maintenance, and continuous operation of the printing process is ensured. The electromagnetic valve is combined to control negative-pressure suction of the dust collecting box and reverse airflow of the exhaust fan, dust attached to the surface of the filter screen is effectively removed, and the service life of the filter screen is prolonged. According to the system, the single-side load is reduced through alternate operation of two channels, and the technical problems that a traditional filtering system is low in shutdown maintenance efficiency, frequent in filter screen blockage, complex in manual operation and high in energy consumption are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment for 3D printing, and particularly to an integrated filtration system and a 3D printer. Background Art

[0002] Currently, 3D printing technology is widely used in the field of high-precision manufacturing, but the waste gas generated during the printing process contains pollutants such as uncured resin particles, pyrolysis volatiles, and support material debris.

[0003] Most of the existing filtration systems of 3D printers adopt a single filtration channel, and the filter screen needs to be cleaned during shutdown, resulting in the interruption of printing operations, low efficiency. Moreover, the filter screen in the traditional filtration system is prone to be blocked by dust due to the lack of a self-cleaning mechanism, and needs to be frequently replaced. And when maintaining, multiple components need to be disassembled, the operation is cumbersome, which seriously restricts the continuous printing efficiency.

[0004] Therefore, the present invention provides an integrated filtration system and a 3D printer to solve one or more of the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated filtration system and a 3D printer to solve one or more of the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: including: an integrated filter cylinder, a dust collection box and an air guide chamber are installed at the top of the integrated filter cylinder, a filter frame is installed inside the integrated filter cylinder, a U-shaped pipe is installed at the bottom of the integrated filter cylinder, and one end of a connecting pipe one is connected to the U-shaped pipe, and the other end of the connecting pipe one is connected to the air outlet of the 3D printer. Two groups of side covers are symmetrically installed on both sides of the integrated filter cylinder, and the side covers are linked with the filter frame inside the integrated filter cylinder through a driving component.

[0007] Preferably, two groups of dust collection boxes are provided, and the two groups of dust collection boxes are symmetrically arranged on both sides of the air guide chamber. One side of each group of dust collection boxes is communicated with the integrated filter cylinder through a connecting pipe two, and the other side of each group of dust collection boxes is communicated with the air guide chamber through a connecting pipe three. The air guide chamber is communicated with the inside of the integrated filter cylinder, and an exhaust port is opened at the top of the air guide chamber.

[0008] Preferably, a three-way valve is installed at the connection between the connecting pipe one and the U-shaped pipe, a cover plate is provided at the top of the dust collection box, an exhaust fan is installed in the air guide chamber, an electromagnetic valve is installed on each connecting pipe three, and a number of filter meshes one are installed inside the connecting pipe three.

[0009] Preferably, two groups of filter frames are provided, and each group of filter frames is connected to the side cover through a driving component. Two dividing plates are fixedly arranged on the inner wall of the integrated filter cylinder, and the two dividing plates are rotationally symmetric about the vertical central axis of the integrated filter cylinder.

[0010] Preferably, the driving motor is fixedly arranged in the middle of the inner wall of the integrated filter cartridge. A second driving gear is fixedly sleeved on the output shaft of the driving motor. The first driving gear meshes with the second driving gear, and the first driving gear is fixedly sleeved on the outer wall of the driving connecting rod. Air flow control plates are fixedly sleeved at both ends of the driving connecting rod. The air flow control plates are attached to the partition plate and are movably connected to the inner wall of the integrated filter cartridge.

[0011] Preferably, the partition plate is provided with a second ventilation hole, and the air flow control plate is provided with a first ventilation hole. The second ventilation hole and the first ventilation hole have the same aperture.

[0012] Preferably, the driving assembly includes: a positioning frame fixedly arranged on the outer wall of the top of the integrated filter cartridge. The first driving rod is rotatably connected to the positioning frame. One side of the side cover close to the positioning frame is connected to the first driving rod through two sets of annular connectors. A torsion spring is installed between the two sets of annular connectors. The filter screen support is rotatably connected to the inner wall of the integrated filter cartridge. A number of filter screen slots are provided in the filter screen support. A second filter screen is movably installed in each filter screen slot. The sealing plate is movably installed on the top of the filter screen support, and an L-shaped avoidance groove is provided in the filter screen support.

[0013] Preferably, two sets of first support frames and two sets of second support frames are symmetrically and fixedly arranged on the outer walls of the front and rear sides of the integrated filter cartridge. Both ends of the first driving rod are rotatably connected to the two sets of second support frames. The same second driving rod is rotatably installed on each first support frame. A fourth driving wheel is fixedly sleeved on the outer wall of the second driving rod. The end of the second driving rod far from the first support frame extends into the horizontal section of the L-shaped avoidance groove and is fixedly sleeved with a second bevel gear. The fourth driving rod is movably installed in the vertical section of the L-shaped avoidance groove. One end of the fourth driving rod is fixedly connected to the sealing plate. A first bevel gear is fixedly sleeved on the other end of the fourth driving rod. The first bevel gear meshes with the second bevel gear. Two sets of third driving rods are symmetrically installed on the outer walls of the front and rear sides of the integrated filter cartridge. A third driving wheel is fixedly sleeved on one end of each third driving rod. The other end of the third driving rod is fixedly connected to the outer wall of the filter screen support.

[0014] Preferably, two sets of first driving wheels are symmetrically and fixedly sleeved on the outer wall of the first driving rod. Each first driving wheel is connected to the same side of the third driving wheel through a second driving belt. A second driving wheel is movably installed on one of the second support frames. One end of the first driving rod extends into the second driving wheel. A push plate is fixedly arranged on the outer wall of the end of the first driving rod extending into the second driving wheel. A driving baffle is installed in the second driving wheel. The first driving rod drives the second driving wheel to rotate intermittently through the cooperation of the push plate and the driving baffle. The second driving wheel and the fourth driving wheel are connected through a first driving belt.

[0015] A 3D printer for filtering through the above integrated filtering system, comprising a printer main body. An air outlet is provided at the top of the printing chamber of the printer main body. The air outlet is hermetically connected to the U-shaped pipe of the integrated filter cylinder through a first connecting pipe. A control unit is provided inside the printer main body. The control unit is electrically connected to a driving motor, an exhaust fan, and a solenoid valve respectively, and the control unit is configured to synchronously regulate the filtering frame switching action of the driving assembly and the start-stop timing sequence of the exhaust fan according to the printing working conditions.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] Through the dual-channel redundancy design and the mechanical linkage automation structure, the present invention realizes the non-stop maintenance function of the 3D printer filtering system. The operator only needs to open and close the side cover once to synchronously complete the filtering path switching, the maintenance window opening, and the filter screen bracket positioning, significantly simplifying the operation process. Combining the negative pressure suction of the dust collection box controlled by the solenoid valve and the reverse air flow self-cleaning technology of the exhaust fan, it effectively separates light waste materials and removes the attachments on the surface of the filter screen, increasing the service life of the filter screen by more than 30%. The system reduces the load of the single-side filter screen through the dual-channel alternating operation mechanism, and cooperates with the intelligent air velocity regulation and the modular and repeatable cleaning design to significantly improve the operation economy of the equipment while ensuring the continuous cleanliness of the printing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view structural schematic diagram of the present invention;

[0019] Figure 2 It is the sectional structural schematic Figure 1 ;

[0020] Figure 3 It is the sectional structural schematic Figure 2 ;

[0021] Figure 4 It is the structural schematic diagram of the driving assembly in the present invention Figure 1 ;

[0022] Figure 5 It is the structural schematic diagram of the driving assembly in the present invention Figure 2 ;

[0023] Figure 6 It is the structural schematic diagram of the driving assembly in the present invention Figure 3 ;

[0024] Figure 7 It is the present invention Figure 6 The enlarged schematic diagram of the structure at A in the present invention.

[0025] In the figure: 1. Integrated filter cartridge; 2. Three-way valve; 3. First connecting pipe; 4. U-shaped pipe; 5. Side cover; 6. Driving assembly; 7. Filter frame; 8. Dust collection box; 9. Air guide chamber; 10. Exhaust fan; 11. Second connecting pipe; 12. Solenoid valve; 13. Third connecting pipe; 14. Driving motor; 15. Driving connecting rod; 16. First driving gear; 17. Second driving gear; 18. Airflow control plate; 19. First ventilation hole; 20. Partition plate; 21. Second ventilation hole; 22. First filter net; 23. Cover plate; 24. First support frame; 25. Second support frame; 26. Positioning frame; 27. Ring-shaped connecting piece; 28. First driving rod; 29. First driving wheel; 30. Second driving wheel; 31. Torsion spring; 32. First driving belt; 33. Second driving belt; 34. Second driving rod; 35. Third driving rod; 36. Filter net support; 37. Filter net slot; 38. Second filter net; 39. Sealing plate; 40. Fourth driving rod; 41. First bevel gear; 42. Second bevel gear; 43. Third driving wheel; 44. Fourth driving wheel; 45. Driving baffle; 46. Pushing plate; 47. L-shaped avoidance groove. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Embodiment 1

[0030] Please refer to Figure 1 - Figure 2 Figure 1 - Figure 2 , the present invention provides a technical solution, including: an integrated filter cartridge 1, a dust collection box 8 and an air guide chamber 9 are installed at the top of the integrated filter cartridge 1, a filter frame 7 is installed inside the integrated filter cartridge 1, a U-shaped pipe 4 is installed at the bottom of the integrated filter cartridge 1, and one end of a connecting pipe 1 3 is connected to the U-shaped pipe 4, and the other end of the connecting pipe 1 3 is connected to the air outlet of the 3D printer. Two groups of side covers 5 are symmetrically installed on both sides of the integrated filter cartridge 1, and the side covers 5 are linked with the filter frame 7 inside the integrated filter cartridge 1 through a driving component 6.

[0031] Preferably, two groups of dust collection boxes 8 are provided, and the two groups of dust collection boxes 8 are symmetrically arranged on both sides of the air guide chamber 9. One side of each group of dust collection boxes 8 is communicated with the integrated filter cartridge 1 through a connecting pipe 2 11, and the other side of each group of dust collection boxes 8 is communicated with the air guide chamber 9 through a connecting pipe 3 13. The air guide chamber 9 is communicated with the inside of the integrated filter cartridge 1, and an exhaust port is opened at the top of the air guide chamber 9.

[0032] The working principle and beneficial effects of the above technical solution are as follows: When the 3D printer is running, by controlling the three-way valve 2, the dust-containing waste gas generated in the printing chamber can enter the left or right integrated filter cartridge 1 through the connecting pipe 1 3 and the U-shaped pipe 4, and flow upward with the air flow, and is finely filtered through the filter net 2 38 in the symmetrically arranged filter frames 7 on both sides. The filtered clean gas is discharged through the exhaust port at the top of the air guide chamber 9, while the intercepted dust accumulates on the surface of the filter net 2 38 and the bottom of the integrated filter cartridge 1. When one side of the filter frame 7 needs to be cleaned, the driving component 6 drives the filter frame 7 to rotate and switch through the linkage of the side cover 5, and controls the waste gas to automatically switch to the other side filtering path to achieve continuous filtering. Through the symmetric layout of the double filter frames 7 and the dust collection box 8, online switching and maintenance are supported, avoiding downtime and affecting the printing continuity. And through the mechanical linkage of the side cover 5 and the filter frame 7, the manual operation process is simplified, and the synchronous control of the filter path switching and the maintenance window opening is realized through a single action.

[0033] Embodiment 2

[0034] On the basis of Embodiment 1, please refer to Figure 1 - Figure 3 Figure 1 - Figure 3 , a three-way valve 2 is installed at the connection between the connecting pipe 1 3 and the U-shaped pipe 4, a cover plate 23 is provided at the top of the dust collection box 8, an exhaust fan 10 is installed in the air guide chamber 9, an electromagnetic valve 12 is installed on each group of connecting pipes 3 13, and several groups of filter nets 1 22 are installed in the connecting pipe 3 13.

[0035] Preferably, two groups of filter frames 7 are provided, and each group of filter frames 7 is connected to the side cover 5 through a group of driving components 6. Two groups of partition plates 20 are fixedly arranged on the inner wall of the integrated filter cartridge 1, and the two groups of partition plates 20 are rotationally symmetric about the vertical central axis of the integrated filter cartridge 1.

[0036] Preferably, the drive motor 14 is fixedly arranged in the middle of the inner wall of the integrated filter cartridge 1. A second drive gear 17 is fixedly sleeved on the output shaft of the drive motor 14. The first drive gear 16 meshes with the second drive gear 17, and the first drive gear 16 is fixedly sleeved on the outer wall of the drive link 15. Airflow control plates 18 are fixedly sleeved at both ends of the drive link 15, and the airflow control plates 18 are attached to the partition plate 20 and are movably connected to the inner wall of the integrated filter cartridge 1.

[0037] Preferably, the partition plate 20 is provided with a second ventilation hole 21, and the airflow control plate 18 is provided with a first ventilation hole 19, and the second ventilation hole 21 and the first ventilation hole 19 have the same aperture.

[0038] Preferably, the top of the cover plate 23 is provided with air holes for communicating with the outside.

[0039] The working principle and beneficial effects of the above technical solution are as follows: During use, by starting the drive motor 14 to drive the second drive gear 17 to rotate, and then the first drive gear 16 drives the drive link 15 to rotate until the partition plate 20 on the right side as shown in Figure 2 is blocked by the airflow control plate 18, and after the first ventilation hole 19 and the second ventilation hole 21 on the partition plate 20 on the left side and the airflow control plate 18 coincide, start the exhaust fan 10 to pass the waste gas generated in the 3D printer through the first connecting pipe 3 along the U-shaped pipe 4 on the left side into the integrated filter cartridge 1. At this time, the waste gas will become clean gas after passing through a number of groups of second filter meshes 38 in the left filter frame 7 and pass through the second ventilation hole 21 and the first ventilation hole 19 to be discharged from the top of the air guide chamber 9. When the left filter frame 7 has been used for a period of time, waste filtered will accumulate in the integrated filter cartridge 1 on this side. At this time, rotate the three-way valve 2 and synchronously start the drive motor 14 to rotate in the reverse direction, so that the partition plate 20 on the left side is blocked by the airflow control plate 18. After the first ventilation hole 19 and the second ventilation hole 21 on the partition plate 20 on the right side and the airflow control plate 18 coincide, the waste gas will enter the integrated filter cartridge 1 on the right side along the U-shaped pipe 4 on the right side for filtration.

[0040] At this time, the solenoid valve 12 on the left connecting pipe three 13 can be selected to be opened (the right solenoid valve 12 needs to be closed), so that a communication space is formed between the dust collection box 8 on the left side and the integrated filter cartridge 1 on this side through the connecting pipe two 11 (the air holes on the cover plate 23 on this side need to be opened). With the assistance of the exhaust fan 10, the waste with lighter mass accumulated and filtered on the left side of the filter frame 7 will be extracted from the connecting pipe two 11 into the dust collection box 8 on this side, and the possible attachments on the filter frame 7 can be sucked at the same time, so as to prevent blockage. In addition, the setting of several groups of filter screens one 22 on the connecting pipe three 13 can also prevent waste from entering the air guide chamber 9. Therefore, the waste with lighter mass can be accumulated in the dust collection box 8 and taken out by opening the cover plate 23. This can not only separate waste with different masses, but also extend the service life of the filter screen two 38 in the filter frame 7.

[0041] Through the above method, the dust collection boxes 8 on the left and right sides can be used alternately, and the waste accumulated in the integrated filter cartridge 1 can be separated for subsequent treatment without stopping the 3D printer, which greatly improves the working efficiency of the 3D printer and can always ensure the cleanliness of the printing chamber in the 3D printer.

[0042] It should be noted that the setting of the dust collection box 8 is to separate and extend the service life of the filter screen two 38. After the 3D printer is used for a long time, it is still necessary to drive the filter frame 7 through the driving component 6 to clean or replace the filter screen two 38 inside it.

[0043] Embodiment 3

[0044] Based on any one of Embodiments 1-2, please refer to Figure 3 - Figure 7 , the driving component 6 includes: a positioning frame 26, the positioning frame 26 is fixedly arranged on the outer wall of the top of the integrated filter cartridge 1, a driving rod one 28 is rotatably connected with the positioning frame 26, one side of the side cover 5 close to the positioning frame 26 is connected with the driving rod one 28 through two sets of annular connectors 27, a torsion spring 31 is installed between the two sets of annular connectors 27, a filter screen support 36 is rotatably connected with the inner wall of the integrated filter cartridge 1, a number of filter screen slots 37 are opened in the filter screen support 36, and a filter screen two 38 is movably installed in each filter screen slot 37. A sealing plate 39 is movably installed on the top of the filter screen support 36, and an L-shaped avoidance groove 47 is opened in the filter screen support 36.

[0045] Preferably, two sets of first support frames 24 and two sets of second support frames 25 are symmetrically and fixedly arranged on the outer walls of the front and rear sides of the integrated filter cartridge 1. Both ends of the first driving rod 28 are rotatably connected to the two sets of second support frames 25. The same second driving rod 34 is rotatably installed on each first support frame 24. A fourth driving wheel 44 is fixedly sleeved on the outer wall of the second driving rod 34. One end of the second driving rod 34 away from the first support frame 24 extends into the horizontal section of the L-shaped avoidance groove 47 and is fixedly sleeved with a second bevel gear 42. The fourth driving rod 40 is movably installed in the vertical section of the L-shaped avoidance groove 47. One end of the fourth driving rod 40 is fixedly connected to the sealing plate 39. A first bevel gear 41 is fixedly sleeved on the other end of the fourth driving rod 40. The first bevel gear 41 meshes with the second bevel gear 42. The two third driving rods 35 are symmetrically installed on the outer walls of the front and rear sides of the integrated filter cartridge 1. One end of each third driving rod 35 is fixedly sleeved with a third driving wheel 43. The other end of the third driving rod 35 is fixedly connected to the outer wall of the filter screen support 36.

[0046] Preferably, two sets of first driving wheels 29 are symmetrically and fixedly sleeved on the outer wall of the first driving rod 28. Each first driving wheel 29 is connected to the third driving wheel 43 on the same side by a second driving belt 33. A second driving wheel 30 is movably installed on one of the second support frames 25. One end of the first driving rod 28 extends into the second driving wheel 30. A push plate 46 is fixedly arranged on the outer wall of the end of the first driving rod 28 extending into the second driving wheel 30. A driving baffle 45 is installed in the second driving wheel 30. The first driving rod 28 drives the second driving wheel 30 to rotate intermittently through the cooperation of the push plate 46 and the driving baffle 45. The second driving wheel 30 is connected to the fourth driving wheel 44 by a first driving belt 32.

[0047] The working principle and beneficial effects of the above technical solution are as follows: When using the filter screen slot 37 in the left filter frame 7 for filtration, the filter screen slot 37 in the right filter frame 7 can be cleaned. At this time, as Figure 3 shown in the figure, the right partition plate 20 is blocked by the air flow control plate 18. The left partition plate 20 coincides with the first ventilation hole 19 and the second ventilation hole 21 on the air flow control plate 18. The waste gas in the printer is filtered from the left in the manner of Embodiment 2. The user manually opens the right side cover 5. While the side cover 5 rotates around the positioning frame 26 through the first driving rod 28, it drives the third driving wheel 43 to rotate synchronously through the first driving wheel 29 and the second driving belt 33. At this time, the filter frame 7 on the right side in the integrated filter cartridge 1 rotates synchronously (from the vertical state to the horizontal state).

[0048] Meanwhile, when the driving rod 1 28 starts to rotate at one end of the driving wheel 2 30, since there is a gap between the driving baffle 45 and the pushing plate 46, the driving wheel 2 30 will not rotate. When the filtering frame 7 rotates 35°, the pushing plate 46 just abuts against the driving baffle 45. At this time, while the driving rod 1 28 continues to rotate, it will push the driving wheel 2 30 to rotate and drive the driving wheel 4 44 to rotate synchronously through the driving belt 1 32. While the driving wheel 4 44 rotates, it drives the bevel gear 2 42 to rotate synchronously through the driving rod 2 34, and then drives the driving rod 4 40 to rotate through the bevel gear 1 41. Finally, the sealing plate 39 no longer blocks the filter slot 37 on the filter screen support 36.

[0049] In the above way, when the user opens the side cover 5, the vertically placed filter screen support 36 will rotate towards the horizontal direction, and the sealing plate 39 also rotates synchronously to provide an avoidance space for the disassembly of the filter screen 2 38, until the side cover 5 is Figure 3 fully opened as shown in the figure. At this time, the filter screen support 36 is completely in the horizontal state. At this time, the user can clean or replace the filter screen 2 38 installed therein, or can also clean or overhaul the inside of the integrated filter cartridge 1 on this opened side synchronously.

[0050] In the above way, the left and right sides of the integrated filter cartridge 1 can be alternately cleaned without stopping the 3D printer, so that while ensuring that the 3D printer is always clean, its working efficiency is not reduced, which is simple and efficient.

[0051] Embodiment 4

[0052] The present invention also provides a 3D printer for filtering through the above integrated filtering system, including a printer main body. An air outlet is provided at the top of the printing chamber of the printer main body. The air outlet is hermetically connected to the U-shaped pipe 4 of the integrated filter cartridge 1 through a connecting pipe 1 3. A control unit is provided in the printer main body. The control unit is electrically connected to the driving motor 14, the exhaust fan 10, and the solenoid valve 12 respectively, and the control unit is configured to synchronously regulate the filtering frame 7 switching action of the driving component 6 and the start-stop timing of the exhaust fan 10 according to the printing working conditions.

[0053] The working principle and its beneficial effects of the above technical solution are as follows: The control unit real-time monitors the dust concentration in the printing chamber through the built-in sensor and the differential pressure data of the filtering system. Under the standard printing working conditions, the control unit defaults to open the left filtering channel and controls the exhaust fan to operate at the basic speed to ensure the balance between the waste gas filtering efficiency and the energy consumption. When it is detected that the differential pressure of the left filtering channel exceeds the threshold value, indicating that the filter screen 2 is blocked, the control unit performs the following actions:

[0054] 1. Switching instruction: Send a reverse rotation signal to the drive motor 14 to drive the air flow control board 18 to close the left ventilation hole and simultaneously open the right filter channel;

[0055] 2. Air flow coordination: During the switching process, briefly increase the rotation speed of the exhaust fan 10 to compensate for the air flow fluctuations caused by the path switching and maintain the negative pressure stability of the printing chamber;

[0056] 3. Dust collection linkage: After the switching is completed, open the right solenoid valve 12 to activate the waste suction function of the right dust collection box 8, and simultaneously close the left solenoid valve 12 to prevent air flow interference.

[0057] Through the above methods, the start-stop logic of the drive motor 14, the solenoid valve 12, and the exhaust fan 10 can be deeply bound to the printing process. For example, when printing high-volatile materials, the fan speed can be automatically increased to enhance the waste gas treatment ability.

[0058] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An integrated filtration system, characterized in that: including: An integrated filter cartridge (1), a dust collection box (8) and an air guide chamber (9) are installed at the top of the integrated filter cartridge (1), a filter frame (7) is installed inside the integrated filter cartridge (1), a U-shaped pipe (4) is installed at the bottom of the integrated filter cartridge (1), and one end of a first connecting pipe (3) is connected to the U-shaped pipe (4), and the other end of the first connecting pipe (3) is connected to the air outlet of a 3D printer. Two groups of side covers (5) are symmetrically installed on both sides of the integrated filter cartridge (1), and the side covers (5) are linked with the filter frame (7) inside the integrated filter cartridge (1) through a driving assembly (6).

2. The integrated filtration system according to claim 1, characterized in that: Two groups of dust collection boxes (8) are provided, and the two groups of dust collection boxes (8) are symmetrically arranged on both sides of the air guide chamber (9). One side of each group of dust collection boxes (8) is communicated with the integrated filter cartridge (1) through a second connecting pipe (11), and the other side of each group of dust collection boxes (8) is communicated with the air guide chamber (9) through a third connecting pipe (13). The air guide chamber (9) is communicated with the inside of the integrated filter cartridge (1), and a discharge port is opened at the top of the air guide chamber (9).

3. The integrated filtration system according to claim 2, characterized in that: A three-way valve (2) is installed at the connection between the first connecting pipe (3) and the U-shaped pipe (4). A cover plate (23) is provided at the top of the dust collection box (8). An exhaust fan (10) is installed inside the air guide chamber (9). An electromagnetic valve (12) is installed on each group of third connecting pipes (13), and a number of first filter meshes (22) are installed inside the third connecting pipe (13).

4. The integrated filtration system according to claim 1, characterized in that: Two groups of filter frames (7) are provided, and each group of filter frames (7) is connected to the side cover (5) through a group of driving assemblies (6). Two partition plates (20) are fixedly arranged on the inner wall of the integrated filter cartridge (1), and the two partition plates (20) are rotationally symmetric about the vertical central axis of the integrated filter cartridge (1).

5. The integrated filtration system according to claim 4, characterized in that: A driving motor (14) is fixedly arranged in the middle of the inner wall of the integrated filter cartridge (1). A second driving gear (17) is fixedly sleeved on the output shaft of the driving motor (14). A first driving gear (16) meshes with the second driving gear (17), and the first driving gear (16) is fixedly sleeved on the outer wall of a driving connecting rod (15). Air flow control plates (18) are fixedly sleeved at both ends of the driving connecting rod (15), and the air flow control plates (18) are in contact with the partition plates (20) and are movably connected to the inner wall of the integrated filter cartridge (1).

6. The integrated filtration system according to claim 5, characterized in that: Ventilation holes II (21) are formed in the partition plates (20), ventilation holes I (19) are formed in the air flow control plates (18), and the apertures of the ventilation holes II (21) and the ventilation holes I (19) are the same.

7. The integrated filtration system according to claim 1, characterized in that: The driving component (6) includes: a positioning frame (26), the positioning frame (26) is fixedly arranged on the outer wall of the top of the integrated filter cartridge (1), a first driving rod (28) is rotatably connected to the positioning frame (26), and one side of the side cover (5) close to the positioning frame (26) is connected to the first driving rod (28) through two groups of annular connectors (27). A torsion spring (31) is installed between the two groups of annular connectors (27). The filter screen support (36) is rotatably connected to the inner wall of the integrated filter cartridge (1). A plurality of groups of filter screen slots (37) are formed in the filter screen support (36), and a second filter screen (38) is movably installed in each group of filter screen slots (37). A sealing plate (39) is movably installed on the top of the filter screen support (36), and an L-shaped avoidance groove (47) is formed in the filter screen support (36).

8. An integrated filtration system according to claim 7, wherein: Two groups of first support frames (24) and two groups of second support frames (25) are symmetrically and fixedly arranged on the outer walls of the front and rear sides of the integrated filter cartridge (1). Both ends of the first driving rod (28) are rotatably connected to the two groups of second support frames (25). The same second driving rod (34) is rotatably installed on each first support frame (24). A fourth driving wheel (44) is fixedly sleeved on the outer wall of the second driving rod (34). One end of the second driving rod (34) away from the first support frame (24) extends movably into the horizontal section of the L-shaped avoidance groove (47) and is fixedly sleeved with a second bevel gear (42). A fourth driving rod (40) is movably installed in the vertical section of the L-shaped avoidance groove (47), and one end of the fourth driving rod (40) is fixedly connected to the sealing plate (39). A first bevel gear (41) is fixedly sleeved on the other end of the fourth driving rod (40). The first bevel gear (41) meshes with the second bevel gear (42). Two groups of third driving rods (35) are symmetrically installed on the outer walls of the front and rear sides of the integrated filter cartridge (1), and a third driving wheel (43) is fixedly sleeved on one end of each group of third driving rods (35). The other end of the third driving rod (35) is fixedly connected to the outer wall of the filter screen support (36).

9. An integrated filtration system according to claim 8, wherein: Two groups of first driving wheels (29) are symmetrically and fixedly sleeved on the outer wall of the first driving rod (28), and each group of first driving wheels (29) is connected to the third driving wheel (43) on the same side through a second driving belt (33). A second driving wheel (30) is movably installed on one of the second support frames (25), and one end of the first driving rod (28) extends movably into the second driving wheel (30). A push plate (46) is fixedly arranged on the outer wall of the end of the first driving rod (28) extending into the second driving wheel (30). A driving baffle (45) is installed in the second driving wheel (30). The first driving rod (28) drives the second driving wheel (30) to rotate intermittently through the cooperation of the push plate (46) and the driving baffle (45). The second driving wheel (30) is connected to the fourth driving wheel (44) through a first driving belt (32).

10. A 3D printer for filtering through an integrated filtration system according to any one of claims 1-9 above, wherein, It includes a printer main body. An air outlet is provided at the top of the printing chamber of the printer main body. The air outlet is hermetically connected to the U-shaped pipe (4) of the integrated filter cartridge (1) through a first connecting pipe (3). A control unit is provided in the printer main body. The control unit is electrically connected to a driving motor (14), an exhaust fan (10), and a solenoid valve (12) respectively. And the control unit is configured to synchronously regulate the switching action of the filter frame (7) of the driving assembly (6) and the start-stop timing sequence of the exhaust fan (10) according to the printing conditions.

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