3D printer air circulation control device

Abstract

This invention discloses an air circulation control device for a 3D printer, relating to the field of 3D printer technology. It includes a printer housing and an air circulation control component assembled with and communicating with the printer housing's interior. The air circulation control component includes a mounting base and an airflow regulating component communicating with the mounting base. A suction and purification cylinder assembly is annularly arranged on the airflow regulating component. A connecting cylinder is located at the top of the airflow regulating component, and a drive unit is mounted on the connecting cylinder. This invention, through its airflow regulating component, can adjust the airflow in real time according to the air temperature, thereby controlling the printer temperature, preventing filament deformation, and improving printing accuracy. The suction and purification cylinder assembly, with its filtration characteristics, not only reduces harmful gases and odors inside the printer but also sucks up and filters dust inside the printer, preventing nozzle clogging or contamination of the printing platform.

Description

Technical Field

[0001] This invention relates to the field of 3D printer technology, specifically to an air circulation control device for 3D printers. Background Technology

[0002] 3D printers (such as those using ABS material) require a sealed cavity and filtration system to handle the toxic gases produced by heating. They are generally used in conjunction with an external air purifier and equipped with a dust collector or exhaust duct.

[0003] However, in actual use, firstly, temperature changes can cause a decrease in print quality, thus requiring a customized heat dissipation solution to control temperature changes in real time; secondly, the filter device is prone to clogging, requiring regular cleaning or replacement, which is very cumbersome. In summary, an air circulation control device for 3D printers is designed and provided. Summary of the Invention

[0004] The purpose of this invention is to provide an air circulation control device for a 3D printer. This device, through its airflow adjustment component, can adjust the airflow in real time according to the air temperature to achieve rapid heat dissipation at high temperatures. At the same time, the flexible adjustment of the airflow can further control the printer temperature, prevent filament deformation, and improve printing accuracy. The suction and purification cylinder component has filtration characteristics that can not only reduce harmful gases and odors inside the printer, but also suck up and filter dust inside the printer to prevent nozzle blockage or contamination of the printing platform.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an air circulation control device for a 3D printer, comprising a printer housing and an air circulation control component assembled with and communicating with the printer housing; the air circulation control component includes a mounting base and an airflow regulating component communicating with the mounting base; a suction and purification processing cylinder assembly is annularly arranged on the airflow regulating component for suctioning and filtering foreign objects and harmful gases inside the printer to improve the printing quality; and a connecting cylinder is disposed on the top of the airflow regulating component, the connecting cylinder being provided with a drive unit for the operation of the plurality of suction and purification processing cylinder assemblies.

[0006] Preferably, the airflow regulating assembly includes a vertical cylinder communicating with the top of the mounting base, with a mounting ring disposed in a through groove in the middle of the vertical cylinder; and a regulating valve assembly disposed in the middle of the mounting ring for adjusting the flow rate of the mounting ring, the regulating valve assembly including a cross fixed in the middle of the mounting ring and a mounting sleeve fixed in the middle of the cross; further including rotating shafts disposed between the mounting sleeve and the mounting ring and distributed in a ring, with fan blades fixed on each rotating shaft, so that when several fan blades are kept in a flush state, they can form a complete circle and be used to close the opening in the middle of the mounting ring; and a transmission mechanism for driving several rotating shafts to rotate and simultaneously adjusting the angle of several fan blades to adjust the flow rate of the mounting ring.

[0007] Preferably, the transmission mechanism includes a transmission rod assembly and a meshing transmission assembly for driving the transmission rod assembly. The transmission rod assembly includes a groove formed on the outer wall of the mounting ring, and a rotatable transmission ring is provided in the groove. Each outer end of the rotating shaft passes through a through hole formed on the side wall of the mounting ring and is fixed with a transmission bar. The end of the transmission bar away from the rotating shaft is provided with a transmission groove. A transmission column is circumferentially arranged on the outer periphery of the transmission ring, and the transmission column corresponds one-to-one with the transmission groove and can be limited to move within the corresponding transmission groove.

[0008] Preferably, the meshing transmission assembly includes a transmission frame fixed on the transmission ring, with a plurality of teeth evenly arranged on the outer edge of the transmission frame; and a drive motor fixed on the outer wall of the vertical cylinder, wherein a gear meshing with the plurality of teeth is fixed at the output end of the drive motor.

[0009] Preferably, a rotary sealing ring is provided between each of the rotating shafts and the through hole opened on the mounting ring.

[0010] Preferably, each of the suction purification cylinder assemblies includes a mounting plate fixed to the outer periphery of the top of the vertical cylinder, a piston sleeve fixed to the upper surface of the mounting plate, and a first and a second through pipe symmetrically distributed on both sides of the vertical cylinder. The opposite ends of the first and second through pipes are respectively connected to the side walls of the vertical cylinder and the connecting cylinder. Their opposite ends extend into the piston sleeve and are symmetrically equipped with filter valve assemblies. Each filter valve assembly includes upper and lower filter valve bodies. Each filter valve body includes a mounting hole formed in the side wall of the piston sleeve, within which a tube body is disposed, and a component assembled on the piston sleeve. The tube body includes an activated carbon filter element near one end of the piston sleeve; it also includes a stepped section in the middle of the tube body, the central opening of the stepped section being for ventilation, and a one-way valve plate on the side of the stepped section near the piston sleeve for opening and closing the central opening of the stepped section; it also includes a mounting bracket on the top of the piston sleeve, on which a piston rod is telescopically mounted, wherein one end of the piston rod passes through a through groove opened on the top of the piston sleeve and is fixed with a piston plate, and the other end is fixed with a support rod, and the drive unit is used to drive the support rod to move longitudinally so that the piston plate performs piston movement inside the piston sleeve.

[0011] Preferably, a rubber ring is provided in the through groove at the top of the piston sleeve to ensure the sealing of the piston sleeve.

[0012] Preferably, the drive unit includes a transmission unit, a dual-axis motor, and a suction unit arranged sequentially from top to bottom, wherein the transmission unit and the suction unit are respectively disposed on the output shafts at both ends of the dual-axis motor; the transmission unit includes a transmission cylinder fixed on the top output shaft of the dual-axis motor, and a limiting groove formed on the outer periphery of the transmission cylinder, wherein the limiting groove is composed of an upper inclined groove and a lower inclined groove connected end to end; it also includes a limiting rod fixed on the top end of each support rod, and the end of the limiting rod away from the support rod can slide within the limiting groove for limiting; the suction unit includes a cylinder fixed on the top of the connecting cylinder and communicating with the connecting cylinder, the outer periphery of the cylinder is provided with a vent hole, and a suction fan disposed inside the cylinder, and the suction fan is fixed to the output shaft at the bottom end of the dual-axis motor.

[0013] Preferably, a connecting pipe is provided between the side wall of the cylinder and the printer housing to realize the circulation process after air treatment, and temperature sensors and humidity sensors are respectively provided on the inner walls of the vertical cylinder and the connecting cylinder to monitor the temperature of the vertical cylinder and the humidity of the air inside the connecting cylinder in real time; a cooler is provided at the connection between each of the first pipes and the vertical cylinder; and a heating module is also provided inside the connecting cylinder to regulate the humidity of the air.

[0014] Preferably, a toner filter screen is fixed to the lower part of the vertical cylinder, and a connecting rod is provided at the bottom of the suction fan. The connecting rod passes downward through the connecting cylinder and the mounting sleeve in sequence and is fixed with a brush rod, and the brush rod is in contact with the upper surface of the toner filter screen.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention, through the setting of the air volume adjustment component, can adjust the air volume in real time according to the air temperature to achieve rapid heat dissipation under high temperature. At the same time, the flexible adjustment of the air volume can further control the printer temperature, prevent the filament from deforming, and improve printing accuracy. The set of suction purification cylinder component has the filtration characteristics that can not only reduce harmful gases and odors inside the printer, but also suck up and filter dust inside the printer to avoid clogging the nozzle or contaminating the printing platform.

[0017] 2. In another embodiment of the present invention, the transmission cylinder in which the transmission unit is located has a limiting groove on its side wall that can be slidably installed with a limiting rod fixed to the top of several support rods. At the same time, the limiting groove is composed of an upper inclined groove and a lower inclined groove connected end to end. Therefore, when the transmission cylinder rotates, the four piston plates can move longitudinally in an alternating manner. While the four suction purification cylinder assemblies are working in an alternating manner, the suction fan installed inside the cylinder operates to assist the suction of the suction purification cylinder assembly, and at the same time, the air treated inside the connecting cylinder is discharged through the vent hole opened on the side wall of the cylinder.

[0018] 3. In another embodiment of the present invention, one end of the connecting rod is fixed to the suction fan, and the other end is fixed with a brush rod. The brush rod contacts the upper surface of the toner filter screen set at the bottom of the vertical cylinder. The gas drawn out from inside the printer first contacts the toner filter screen to realize the gas pre-purification process. Here, the toner filter screen is a mature existing technology that can capture fine toner particles in the air. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A partially enlarged structural diagram;

[0021] Figure 3 This is a side view of the structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of AA;

[0023] Figure 5 for Figure 4 A partially enlarged structural diagram;

[0024] Figure 6 This is a top view of the structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of DD;

[0026] Figure 8 for Figure 7 A partially enlarged structural diagram;

[0027] Figure 9 This is a magnified structural diagram of point A;

[0028] Figure 10 This is an enlarged structural diagram of the suction purification cylinder assembly;

[0029] Figure 11 This is an enlarged structural diagram of the airflow regulation component;

[0030] Figure 12 for Figure 11 A top-view structural diagram;

[0031] Figure 13 for Figure 11 A front view structural diagram;

[0032] Figure 14 This is a schematic diagram of the working state of the present invention.

[0033] In the diagram: 111, Assembly base; 112, Vertical cylinder; 2, Suction purification cylinder assembly; 211, Mounting plate; 212, Piston sleeve; 213, First through pipe; 214, Second through pipe; 2151, Pipe body; 2152, Activated carbon filter element; 2153, One-way valve plate; 2154, Stepped section; 216, Mounting bracket; 217, Piston rod; 218, Piston plate; 219, Support rod; 3, Connecting cylinder; 4, Dual-shaft motor; 5, Suction unit; 511, Cylinder body; 512, Suction fan; 6, Transmission unit. 611. Transmission cylinder; 612. Limiting groove; 613. Limiting rod; 7. Air volume adjustment assembly; 711. Cross; 712. Mounting sleeve; 713. Rotating shaft; 714. Fan blade; 715. Transmission bar; 716. Transmission groove; 717. Transmission column; 718. Groove; 719. Transmission ring; 720. Transmission frame; 721. Gear; 722. Drive motor; 723. Gear; 724. Mounting ring; 811. Carbon powder filter; 812. Connecting rod; 813. Brush rod; 911. Refrigerator. Detailed Implementation

[0034] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The various embodiments of this invention are described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] Please see Figures 1 to 14 The present invention preferably provides the following technical solution: an air circulation control device for a 3D printer, including a printer housing and an air circulation control component assembled with and communicating with the printer housing: the air circulation control component includes a mounting base 111 and an air volume regulating component 7 communicating with the mounting base 111; a suction purification cylinder component 2 is annularly arranged on the air volume regulating component 7 for suctioning and filtering foreign objects and harmful gases inside the 3D printer to improve the printing quality of the 3D printer; and a connecting cylinder 3 is arranged on the top of the air volume regulating component 7, and a drive unit is arranged on the connecting cylinder 3 for the operation of several suction purification cylinder components 2.

[0037] like Figure 14 It can be seen that the air circulation control device provided in this application can be assembled with the printer housing, and the drive unit, connecting cylinder 3, suction purification cylinder assembly 2, and air volume adjustment assembly 7 where the air circulation control device is located are distributed sequentially from top to bottom, combined with Figure 1 , 2 As shown, the air volume regulating component 7 is connected to the printer housing through the mounting base 111, and several suction purification cylinder components 2 are disposed on the air volume regulating component 7 and are used to connect the air volume regulating component 7 and the connecting cylinder 3. The drive unit disposed on the connecting cylinder 3 is used to operate the several suction purification cylinder components 2.

[0038] Therefore, when the drive component is running, it can drive several suction and purification cylinder components 2 to start, thereby drawing the air inside the printer into the connecting cylinder 3. During this process, the function of the air volume adjustment component 7 is to adjust the air volume in real time according to the air temperature, so as to achieve rapid heat dissipation at high temperatures and meet the different heat dissipation needs of the 3D printer.

[0039] Specifically, firstly, the air volume regulation characteristics not only meet the requirements of extruded hot melt materials such as PLA and ABS to cool rapidly for shaping, but also accelerate heat dissipation and avoid poor interlayer adhesion or deformation of the filament due to uneven cooling, thus reducing heat accumulation.

[0040] Secondly, this device uses airflow adjustment to achieve flexible adjustment of heat dissipation effect, which can not only avoid uneven shrinkage caused by the filament cooling too fast or too slow, resulting in the edge of the model curling up, but also balance the cooling speed with reasonable airflow.

[0041] The role of the suction purification cylinder assembly 2 in this process is as follows: on the one hand, it serves as the power source for air circulation, and on the other hand, it filters the air flowing through it. It is known that materials such as ABS release trace amounts of toxic gases such as styrene at high temperatures, and long-term inhalation may be harmful to health. Here, the suction purification cylinder assembly 2 can reduce the accumulation of harmful gases. Although PLA is relatively safe, it may still produce odors at high temperatures. Air circulation can improve the user experience, while dust can easily clog nozzles or contaminate the printing platform.

[0042] Example 2

[0043] In another embodiment of the present invention, the airflow regulating assembly 7 includes a vertical cylinder 112 communicating with the top of the mounting base 111, and a mounting ring 724 provided in a through groove in the middle of the vertical cylinder 112; and a regulating valve assembly provided in the middle of the mounting ring 724 for adjusting the flow rate of the mounting ring 724. The regulating valve assembly includes a cross 711 fixed in the middle of the mounting ring 724 and a mounting sleeve 712 fixed in the middle of the cross 711; it also includes rotating shafts 713 arranged in a ring between the mounting sleeve 712 and the mounting ring 724, and each rotating shaft 713 is fixed with a fan blade 714. When the fan blades 714 are kept in a flat state, they can form a complete circle and be used to close the opening in the middle of the mounting ring 724; and a transmission mechanism for driving the rotating shafts 713 to rotate and adjusting the angle of the fan blades 714 to adjust the flow rate of the mounting ring 724.

[0044] Combination Figure 5 , 11 As shown in Figures 12 and 13, it is known that the mounting ring 724 is fixed inside the through groove in the middle of the vertical cylinder 112. The middle of the mounting ring 724 is also provided with a regulating valve assembly for adjusting the flow rate of the mounting ring 724 and the opening in the middle of the vertical cylinder 112, thereby adjusting the flow rate of air entering the several suction purification cylinder assemblies 2.

[0045] Specific combination Figure 11 , 12 As shown, the mounting sleeve 712 is placed in the center of the mounting ring 724, and a rotating shaft 713 is rotatably mounted between the sleeve and the mounting ring 724. Each rotating shaft 713 is fixed with a fan blade 714, and several fan blades 714 can form a complete circle to close the opening in the center of the mounting ring 724. Figure 12 As shown in the figure, since the rotating shaft 713 can rotate under the action of the transmission mechanism, the angle of several fan blades 714 can be tilted, thereby adjusting the opening flow of the vertical cylinder 112 and the mounting ring 724.

[0046] Furthermore, the transmission mechanism includes a transmission rod assembly and a meshing transmission assembly for driving the transmission rod assembly. The transmission rod assembly includes a groove 718 formed on the outer wall of the mounting ring 724, and a rotatable transmission ring 719 is provided in the groove 718. The outer end of each rotating shaft 713 passes through a through hole formed on the side wall of the mounting ring 724 and is fixed with a transmission bar 715. The end of the transmission bar 715 away from the rotating shaft 713 is provided with a transmission groove 716. A transmission column 717 is arranged in a ring around the outer periphery of the transmission ring 719, and the transmission column 717 corresponds one-to-one with the transmission groove 716 and can be limited to move within the corresponding transmission groove 716. Furthermore, the meshing transmission assembly includes a transmission frame 720 fixed on the transmission ring 719, and a plurality of teeth 721 are equidistantly arranged on the outer edge of the transmission frame 720. A drive motor 722 is fixed on the outer wall of the vertical cylinder 112, and a gear 723 that meshes with the plurality of teeth 721 is fixed at the output end of the drive motor 722.

[0047] like Figure 11 , 12 As shown in Figure 13, the transmission ring 719 is rotatably installed inside the groove 718 opened on the outer side of the mounting ring 724, and the outer end of each rotating shaft 713 passes through the through hole opened on the side wall of the mounting ring 724 and is fixed with a transmission bar 715. The transmission groove 716 opened on the transmission bar 715 can be slidably installed with the transmission column 717 provided on the transmission ring 719. At the same time, the transmission frame 720 fixed to the transmission ring 719 has several teeth 721 fixed on it that can mesh with the gear 723 at the output end of the drive motor 722. Therefore, when the drive motor 722 rotates, the transmission ring 719 and several transmission columns 717 on the transmission ring 719 can rotate. Since the length of each transmission groove 716 is limited, several transmission columns 717 can move adaptively inside the corresponding transmission groove 716, thereby driving several transmission bars 715 and rotating shafts 713 to rotate.

[0048] Furthermore, a rotary sealing ring is provided between each rotating shaft 713 and the through hole opened on the mounting ring 724 to ensure the sealing of the outer wall of the fan blade 714.

[0049] Example 3

[0050] In another embodiment of the present invention, each suction purification cylinder assembly 2 includes a mounting plate 211 fixed to the outer periphery of the top of the vertical cylinder 112, a piston sleeve 212 fixed to the upper surface of the mounting plate 211, and a first through pipe 213 and a second through pipe 214 centrally symmetrically distributed on both sides of the vertical cylinder 112. The opposite ends of the first through pipe 213 and the second through pipe 214 are respectively connected to the side walls of the vertical cylinder 112 and the connecting cylinder 3. Their opposite ends extend into the piston sleeve 212 and are symmetrically provided with filter valve assemblies. Each filter valve assembly includes upper and lower filter valve bodies. Each filter valve body includes a mounting hole opened in the side wall of the piston sleeve 212. A tube body 2151 is provided in the mounting hole, and a tube body 2151 is assembled near the piston sleeve. The activated carbon filter element 2152 at one end of the 212 also includes a stepped portion 2154 disposed in the middle of the tube body 2151, the central opening of the stepped portion 2154 being used for ventilation, and a one-way valve plate 2153 disposed on the side of the stepped portion 2154 near the piston sleeve 212 for opening and closing the central opening of the stepped portion 2154; it also includes a mounting bracket 216 disposed on the top of the piston sleeve 212, on which a piston rod 217 is telescopically mounted, wherein one end of the piston rod 217 passes through a through groove opened on the top of the piston sleeve 212 and is fixed with a piston plate 218, and the other end is fixed with a support rod 219, and the drive unit is used to drive the support rod 219 to move longitudinally so that the piston plate 218 performs piston movement inside the piston sleeve 212.

[0051] See Figure 2 , 8 As shown in Figures 9 and 10, in this embodiment, the suction purification cylinder assembly 2 is preferably in four groups. Each group of suction purification cylinder assemblies 2 has a first through pipe 213 and a second through pipe 214 symmetrically arranged on both sides of the piston sleeve 212 on which it is located. Figure 10 As shown, the opposite ends of the first pipe 213 and the second pipe 214 are connected to the side walls of the vertical cylinder 112 and the connecting cylinder 3, respectively. Their opposite ends extend into the piston sleeve 212 and are symmetrically equipped with filter valve assemblies. Each filter valve assembly consists of two filter valve bodies distributed vertically. The two upper filter valve bodies containing the first pipe 213 and the second pipe 214 are positioned opposite each other, and the two lower filter valve bodies are positioned opposite each other. Figure 9 Meanwhile, each filter valve body is provided with an activated carbon filter element 2152 at one end of the pipe 2151 near the piston sleeve 212, and a one-way valve plate 2153 is provided on the side of the stepped section 2154 in the middle near the piston sleeve 212 (that is, the two one-way valve plates 2153 on the first pipe 213 are placed on the right side of the stepped section 2154, while the two one-way valve plates 2153 on the second pipe 214 are placed on the right side of the stepped section 2154, see reference). Figure 9 The activated carbon filter element 2152 here is a mature existing technology that can adsorb dust and harmful gases;

[0052] The piston plate 218 inside the piston sleeve 212 can move longitudinally under the transmission action of the piston rod 217 and the support rod 219, combined with the driving action of the drive unit. With the above structures, when the piston plate 218 moves longitudinally, the one-way valve plates 2153 where the four filter valve bodies are located can be switched to realize the air suction filtration and self-cleaning process.

[0053] To facilitate the explanation of the function of the filter valve body, the upper filter valve body where the first pipe 213 and the second pipe 214 are located is set as A or B, respectively, and the lower filter valve body where the first pipe 213 and the second pipe 214 are located is set as C or D, respectively. The range of motion of the piston plate 218 is between the upper and lower filter valve bodies.

[0054] Combination Figure 9 When the piston plate 218 moves upward inside the piston sleeve 212, the lower cavity of the piston sleeve 212 increases. Due to air pressure, the one-way valve plate 2153 located at C opens towards the piston sleeve 212, the one-way valve plate 2153 located at D closes, and the one-way valve plate 2153 located at A closes. The one-way valve plate 2153 located at B opens towards the connecting cylinder 3, thereby drawing air from inside the vertical cylinder 112 into the lower cavity of the piston sleeve 212 through C. During this process, the air can pass through the activated carbon filter element located at C. Filtering is performed at 2152. At the same time, the activated carbon filter element 2152 at D is subjected to suction towards the piston sleeve 212, achieving self-cleaning. Simultaneously, the one-way valve plate 2153 at A is closed, and the one-way valve plate 2153 at B is opened towards the connecting cylinder 3. When the lower chamber of the piston sleeve 212 draws in gas, the air in the upper chamber of the piston sleeve 212 is pushed into the connecting cylinder 3 and further filtered through the activated carbon filter element 2152 at B. At the same time, the activated carbon filter element 2152 at A self-cleans.

[0055] Conversely, when the piston plate 218 moves downward inside the piston sleeve 212, the one-way valve plate 2153 where A is located opens towards the piston sleeve 212, the one-way valve plate 2153 where B is located closes, the one-way valve plate 2153 where C is located closes, and the one-way valve plate 2153 where D is located opens towards the connecting cylinder 3, so that the air inside the vertical cylinder 112 is drawn into the upper chamber of the piston sleeve 212 through A, and the air in the lower chamber of the piston sleeve 212 is pushed into the connecting cylinder 3.

[0056] In this embodiment, A and B or C and D, which cooperate with each other, can perform self-cleaning while the other performs air purification, ensuring the filtration and purification effect and further improving the filtration quality of harmful gases and impurities.

[0057] Furthermore, a rubber ring is provided in the through groove at the top of the piston sleeve 212 to ensure the sealing of the inside of the piston sleeve 212.

[0058] Example 4

[0059] In another embodiment of the present invention, the drive unit includes a transmission unit 6, a dual-axis motor 4, and a suction unit 5 arranged sequentially from top to bottom. The transmission unit 6 and the suction unit 5 are respectively disposed on the output shafts at both ends of the dual-axis motor 4. The transmission unit 6 includes a transmission cylinder 611 fixed on the top output shaft of the dual-axis motor 4, and a limiting groove 612 formed on the outer periphery of the transmission cylinder 611. The limiting groove 612 is composed of an upper inclined groove and a lower inclined groove connected end to end. It also includes a limiting rod 613 fixed on the top of each support rod 219, and the end of the limiting rod 613 away from the support rod 219 can slide within the limiting groove 612. Further, the suction unit 5 includes a cylinder 511 fixed on the top of the connecting cylinder 3 and communicating with the connecting cylinder 3. The outer periphery of the cylinder 511 is provided with a vent hole, and a suction fan 512 is disposed inside the cylinder 511. The suction fan 512 is fixed to the output shaft at the bottom end of the dual-axis motor 4.

[0060] Since the transmission unit 6 and the suction unit 5 are respectively installed on the output shafts at both ends of the dual-shaft motor 4, the transmission unit 6 and the suction unit 5 can operate simultaneously when the dual-shaft motor 4 is running.

[0061] The transmission cylinder 611 where the transmission unit 6 is located has a limiting groove 612 on its side wall that can be slidably installed with the limiting rod 613 fixed to the top of several support rods 219. At the same time, the limiting groove 612 is composed of an upper inclined groove and a lower inclined groove connected end to end. Therefore, when the transmission cylinder 611 rotates, the four piston plates 218 can move longitudinally in an alternating manner.

[0062] While the four suction purification cylinder assemblies 2 are operating in an alternating manner, the suction fan 512 installed inside the cylinder 511 runs to assist the suction of the suction purification cylinder assemblies 2. At the same time, the air processed inside the connecting cylinder 3 is discharged through the vent holes opened on the side wall of the cylinder 511. This is the first implementation of the cylinder 511.

[0063] Example 5

[0064] As another embodiment of the cylinder 511, a connecting pipe is provided between the side wall of the cylinder 511 and the printer housing to realize the circulation process after air treatment, and temperature sensors and humidity sensors are respectively provided on the inner walls of the vertical cylinder 112 and the connecting cylinder 3 to monitor the temperature of the vertical cylinder 112 and the humidity of the air inside the connecting cylinder 3 in real time; a cooler 911 is provided at the connection between each first pipe 213 and the vertical cylinder 112; and a heating module is also provided inside the connecting cylinder 3 to regulate the humidity of the air.

[0065] In this embodiment, combined with Figure 1 , 2As shown in Figures 10 and 11, air sequentially passes through the vertical cylinder 112, the cooler 911, and the connecting cylinder 3, and then enters the printer through the connecting pipe. During this process, the air drawn from inside the printer first contacts the temperature sensor inside the vertical cylinder 112. When the temperature sensor detects that the temperature of the gas flowing inside the vertical cylinder 112 is too high, the microcontroller receives the temperature signal, causing the drive motor 722 of the airflow adjustment component 7 to run and adaptively adjust the tilt angle of the fan blades 714 to accelerate the printer's heat dissipation efficiency. Subsequently, when this part of the gas enters the first through pipe 213 of the suction purification cylinder assembly 2, this part of the air contacts the cooler 911, combined with... Figure 10 As shown, the gas is cooled down. After cooling, the gas is filtered and then enters the connecting tube 3 and comes into contact with the humidity sensor inside the connecting tube 3. When the humidity sensor detects that the humidity of the gas inside the connecting tube 3 is too high, it transmits the humidity information to the microcontroller. The microcontroller controls the heating module to operate adaptively in real time, so that the air entering the printer through the connecting tube maintains a suitable temperature and humidity.

[0066] Example 6

[0067] In another embodiment of the present invention, a toner filter screen 811 is fixed at the lower part of the vertical cylinder 112, and a connecting rod 812 is provided at the bottom of the suction fan 512. The connecting rod 812 passes downward through the connecting cylinder 3 and the mounting sleeve 712 in sequence and is fixed with a brush rod 813. The brush rod 813 is in contact with the upper surface of the toner filter screen 811.

[0068] like Figure 8 As shown, one end of the connecting rod 812 is fixed to the suction fan 512, and the other end is fixed with a brush rod 813. The brush rod 813 contacts the upper surface of the toner filter 811 set at the lower part of the vertical cylinder 112. The gas drawn out from inside the printer first contacts the toner filter 811 to achieve the pre-purification process of the gas. The toner filter 811 here is a mature existing technology that can capture fine toner particles in the air.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Detachable installation can take many forms, such as through a combination of plug-in and snap-fit ​​connections, or through bolted connections, etc.

[0070] The foregoing, in conjunction with embodiments and accompanying drawings, has clearly and completely described the concept, specific structure, and resulting technical effects of the present invention, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the possibility of forming a better connection structure by adding or reducing connecting accessories, depending on the specific implementation.

[0071] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A 3D printer air circulation control device, comprising a printer housing and an air circulation control component assembled with and communicating with the printer housing, characterized in that: The air circulation control component includes a mounting base (111) and an air volume regulating component (7) connected to the mounting base (111). The air volume regulating component (7) is provided with a suction purification tube component (2) in a ring, which is used to suck up and filter foreign objects and harmful gases inside the 3D printer to improve the printing quality of the 3D printer. And a connecting cylinder (3) is provided on the top of the air volume regulating component (7), and a drive unit is provided on the connecting cylinder (3) for the operation of several suction purification cylinder components (2); Each of the suction purification tube assembly (2) includes a mounting plate (211) fixed to the outer periphery of the top of the vertical tube (112) and a piston sleeve (212) fixed to the upper surface of the mounting plate (211). The first pipe (213) and the second pipe (214) are symmetrically distributed on both sides of the vertical cylinder (112). The opposite ends of the first pipe (213) and the second pipe (214) are connected to the side walls of the vertical cylinder (112) and the connecting cylinder (3), respectively. The opposite ends of the two pipes extend into the piston sleeve (212) and are symmetrically provided with filter valve assemblies. Each filter valve assembly includes upper and lower filter valve bodies. Each filter valve body includes an installation hole opened on the side wall of the piston sleeve (212). The installation hole is provided with a tube body (2151) and an activated carbon filter element (2152) assembled on the tube body (2151) near the piston sleeve (212). It also includes a stepped section (2154) disposed in the middle of the tube body (2151), the central opening of the stepped section (2154) being used for ventilation, and a one-way valve plate (2153) disposed on the side of the stepped section (2154) near the piston sleeve (212) for opening and closing the central opening of the stepped section (2154); It also includes a mounting bracket (216) disposed on the top of the piston sleeve (212), on which a piston rod (217) is telescopically mounted. One end of the piston rod (217) passes through a through slot opened on the top of the piston sleeve (212) and is fixed with a piston plate (218), while the other end is fixed with a support rod (219). The drive unit is used to drive the support rod (219) to move longitudinally so that the piston plate (218) can perform piston movement inside the piston sleeve (212).

2. The 3D printer air circulation control device according to claim 1, characterized in that: The air volume regulating component (7) includes a vertical cylinder (112) communicating with the top of the mounting base (111), and an installation ring (724) is provided in the through groove opened in the middle of the vertical cylinder (112). And a regulating valve assembly disposed in the middle of the mounting ring (724) for adjusting the flow rate of the mounting ring (724), the regulating valve assembly including a cross (711) fixed in the middle of the mounting ring (724) and a mounting sleeve (712) fixed in the middle of the cross (711). It also includes a rotating shaft (713) arranged in a ring between the mounting sleeve (712) and the mounting ring (724), and each rotating shaft (713) is fixed with a fan blade (714). When several fan blades (714) are kept in a flat state, they can form a complete circle and be used to close the opening in the middle of the mounting ring (724). And a transmission mechanism for driving several rotating shafts (713) to rotate, while adjusting the angle of several fan blades (714) to adjust the flow rate of the mounting ring (724).

3. The 3D printer air circulation control device according to claim 2, characterized in that: The transmission mechanism includes a transmission rod assembly and a meshing transmission assembly for driving the transmission rod assembly. The transmission rod assembly includes a groove (718) formed on the outer wall of the mounting ring (724), and a rotatable transmission ring (719) is provided in the groove (718). Each of the rotating shafts (713) has a transmission bar (715) fixed to its outer end through a through hole in the side wall of the mounting ring (724). The transmission bar (715) has a transmission groove (716) at one end away from the rotating shaft (713). And a transmission column (717) is arranged in a ring around the outer periphery of the transmission ring (719), and the transmission column (717) corresponds one-to-one with the transmission groove (716) and can be limited to move inside the corresponding transmission groove (716).

4. The 3D printer air circulation control device according to claim 3, characterized in that: The meshing transmission assembly includes a transmission frame (720) fixed on the transmission ring (719), and a plurality of teeth (721) are equidistantly arranged on the outer edge of the transmission frame (720). And a drive motor (722) fixed to the outer wall of the vertical cylinder (112), and a gear (723) that meshes with a plurality of teeth (721) is fixed at the output end of the drive motor (722).

5. The 3D printer air circulation control device according to claim 2, characterized in that: A rotary sealing ring is provided between each of the said rotating shafts (713) and the through holes opened on the mounting ring (724).

6. The 3D printer air circulation control device according to claim 1, characterized in that: A rubber ring is provided in the through groove at the top of the piston sleeve (212) to ensure the sealing of the inside of the piston sleeve (212).

7. The 3D printer air circulation control device according to claim 1, characterized in that: The drive unit includes a transmission unit (6), a dual-axis motor (4), and a suction unit (5) arranged sequentially from top to bottom. The transmission unit (6) and the suction unit (5) are respectively located on the output shafts at both ends of the dual-axis motor (4). The transmission unit (6) includes a transmission cylinder (611) fixed on the top output shaft of the dual-axis motor (4) and a limiting groove (612) formed on the outer periphery of the transmission cylinder (611), wherein the limiting groove (612) is composed of an upper inclined groove and a lower inclined groove connected end to end. It also includes a limiting rod (613) fixed to the top of each of the support rods (219), and one end of the limiting rod (613) away from the support rod (219) can slide within the limiting groove (612); The suction unit (5) includes a cylinder (511) fixed to the top of the connecting cylinder (3) and communicating with the connecting cylinder (3). The cylinder (511) has a ventilation hole on its outer periphery and a suction fan (512) located inside the cylinder (511). The suction fan (512) is fixed to the output shaft at the bottom of the dual-axis motor (4).

8. The 3D printer air circulation control device according to claim 7, characterized in that: A connecting pipe is provided between the side wall of the cylinder (511) and the printer housing to realize the circulation process after air treatment; Temperature sensors and humidity sensors respectively installed on the inner walls of the vertical cylinder (112) and the connecting cylinder (3) are used to monitor the temperature of the vertical cylinder (112) and the humidity of the air inside the connecting cylinder (3) in real time. A cooler (911) is provided at the connection between each of the first through pipe (213) and the vertical cylinder (112); It also includes a heating module located inside the connecting cylinder (3) for regulating the humidity of the air.

9. The 3D printer air circulation control device according to claim 7, characterized in that: The lower part of the vertical cylinder (112) is fixed with a toner filter screen (811) and a connecting rod (812) set at the bottom of the suction fan (512). The connecting rod (812) passes through the connecting cylinder (3) and the mounting sleeve (712) in sequence and is fixed with a brush rod (813). The brush rod (813) is in contact with the upper surface of the toner filter screen (811).

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