An air inlet device based on a 3D printer wind field system and a control method thereof

Abstract

The application discloses a kind of based on 3D printer wind field system air inlet device and its control method, including the box of printer, the side of the box is equipped with upper air inlet and lower air inlet, the upper air inlet is equipped with vertical adjusting device, the vertical adjusting device is used to adjust vertical wind direction, the outside of the lower air inlet is equipped with connecting pipe, another end of the connecting pipe is communicated with air blower, the other side of the box is equipped with square through slot, the sidewall of the square through slot is fixedly connected with sheet active carbon adsorption cotton, the ground of the inner chamber of the box is fixed printing substrate;By setting vertical adjusting device, the direction of air flow entering the box is continuously adjusted, when air flow is inclined and enters the box upwards, air flow directly impacts the top of the box, dust attached to the top of the box is blown off, dust is blown to the adsorption cotton on the other side, reduce dust residue in the box, reduce the influence of dust on model.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printer wind field system technology, in particular to an air inlet device based on a 3D printer wind field system and a control method thereof. BACKGROUND

[0002] A three-dimensional printer, also known as a three-dimensional printer (3D Printer, 3DP for short), is a process of rapid prototyping (Rapid Prototyping, RP). It uses layer-by-layer accumulation to make three-dimensional models. Its running process is similar to that of a traditional printer, which prints ink on paper to form a two-dimensional plane. However, the three-dimensional printer is a liquid photosensitive resin material, a molten plastic filament, a gypsum powder, and other materials that are sprayed or extruded to form a three-dimensional entity.

[0003] When the printer is printing, heat will be generated, and dust will easily adhere to the inner wall of the printer. When printing, a three-dimensional entity is formed by spraying. When spraying, the disturbed air flow blows the dust particles attached to the inner wall to fall on the three-dimensional entity, affecting the appearance of the entity and being difficult to clean. SUMMARY

[0004] The present application aims to solve the problems in the background art by providing an air inlet device based on a 3D printer wind field system and a control method thereof.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] An air inlet device based on a 3D printer wind field system and a control method thereof, comprising a box body of a printer, one side of the box body is provided with an upper air inlet and a lower air inlet, a vertical adjusting device is arranged at the upper air inlet, the vertical adjusting device is used for adjusting the vertical wind direction, a connecting pipe is arranged outside the lower air inlet, the other end of the connecting pipe is communicated with a blower, the other side of the box body is provided with a square through slot, the side wall of the square through slot is fixedly connected with a sheet-shaped activated carbon adsorption cotton, and a printing substrate is fixedly arranged on the ground in the box body.

[0007] As a preferred technical scheme of the present application, the vertical adjusting device comprises two lateral rotating rods, both of which are rotationally connected to the side wall of the upper air inlet, the outer circle of the lateral rotating rod is fixedly connected to the adjusting plate, the two adjusting plates are arranged in parallel, the two adjusting plates are fixedly connected to the upper and lower bottom surfaces of the upper air inlet through rubber membranes, one side of the box body is fixedly connected to a square tube at the upper air inlet, one end of the square tube is fixedly connected to a filter screen, the side wall of the square tube is fixedly connected to a support rod, one side of the support rod is rotationally connected to a fan, one side of the box body at the upper air outlet is provided with a driving device, and the driving device is used to drive the fan.

[0008] As a preferred technical scheme of the present application, the driving device comprises a mounting plate, the mounting plate is fixedly connected to the box body, one side of the mounting plate is fixedly connected to a motor, the main shaft of the motor penetrates the mounting plate, the main shaft of the motor penetrates the square tube, one end of the main shaft of the motor is fixedly connected to a first bevel gear, one end of the driving shaft of the fan is fixedly connected to a second bevel gear, and the first bevel gear is engaged with the second bevel gear.

[0009] As a preferred technical scheme of the present application, one side of the box body is provided with a placing groove, both of the lateral rotating rods penetrate the box body and extend into the placing groove, the outer circle of both of the lateral rotating rods is fixedly connected to a first gear, both of the first gears are located in the placing groove, the side wall of the placing groove is fixedly connected to a fixed plate, one side of the fixed plate is rotationally connected to a driving gear, a torsion spring is arranged at the connection position between the driving gear and the fixed plate, the outer circle of the main shaft of the motor is fixedly connected to a circular block, the side surface of the circular block is fixedly connected to a pushing rod, the side surface of the driving gear is fixedly connected to a circular rod, and the circular rod is matched with the pushing rod.

[0010] As a preferred technical scheme of the present application, the vertical adjusting device is provided with a lateral adjusting device, the lateral adjusting device is used to adjust the lateral wind direction at the upper air inlet, the lateral adjusting device comprises two vertical rotating rods, both of the vertical rotating rods are rotationally connected to the square tube, both of the vertical rotating rods penetrate the square tube upwards, the outer circle of both of the vertical rotating rods is fixedly connected to a mounting block, one side of both of the mounting blocks is rotationally connected to two square rods, a torsion spring is arranged at the connection position between the square rod and the mounting block, the two square rods located on the same mounting block are arranged in parallel, and an elastic membrane is fixedly connected between the two square rods located on the same mounting block.

[0011] As a preferred technical scheme of the present application, a rack is laterally and slidingly connected in the placing groove, a spring is fixedly connected between one end of the rack and the side wall of the placing groove, the upper end of both of the vertical rotating rods is fixedly connected to a second gear, both of the second gears are engaged with the rack, and the lower surface of the rack is fixedly connected to a vertical rod, one side of one of the first gears is fixedly connected to an arc-shaped block, and the vertical rod is located on one side of the arc-shaped block and matched with the arc-shaped block.

[0012] As a preferred technical solution of the present application, the process flow comprises the following steps using the air inlet device based on the 3D printer wind field system and the control method thereof according to any one of the above.

[0013] First step: the air blower keeps the air flow of the lower air inlet, and the driving device drives the fan to generate air flow of the upper air inlet;

[0014] Second step: while the upper air inlet generates air flow, the driving device drives the vertical adjusting device to change the direction of the air flow entering the box in the up-down direction;

[0015] Third step: while the vertical adjusting device is started by the driving device, the vertical adjusting device drives the horizontal adjusting device to change the horizontal direction of the air flow entering the box;

[0016] Fourth step: after printing is completed, the air blower and the motor are turned off.

[0017] Compared with the prior art, the present application provides an air inlet device based on a 3D printer wind field system and a control method thereof, which has the following beneficial effects:

[0018] 1. The air inlet device based on the 3D printer wind field system and the control method thereof, by setting the adjusting plate, when the air flow generated by the fan passes through the two adjusting plates into the box, at this time, the two adjusting plates are rotated to be up and down, the direction of the air flow entering the box is adjusted continuously, when the air flow is inclined to enter the box upward, the air flow directly impacts the top of the box, blows off the dust attached to the top of the box, and then the two adjusting plates are rotated to be horizontal, blows the dust to the adsorbing cotton on the other side, reduces the dust residue in the box, and reduces the influence of the dust on the model;

[0019] 2. The air inlet device based on the 3D printer wind field system and the control method thereof, by setting the driving device, the motor drives the fan to rotate through the first bevel gear and the second bevel gear, generates air flow, at the same time, the main shaft of the motor drives the circular block to rotate, the circular block drives the driving gear to rotate by poking the circular rod, the driving gear drives the two first gears to rotate in the same direction, so that the two adjusting plates rotate synchronously, thereby changing the direction of the air flow continuously, by poking the rod and the circular rod, the air flow generated by the fan and the adjusting plate adjusting the direction of the air flow are synchronized, the impact effect of the air flow is fully utilized, the adjusting plate adjusts the air flow to be fan-shaped every time, increases the impact direction of the air flow, expands the blowing angle of the air flow to the dust in the box, and makes the box cleaner;

[0020] 3. The air inlet device based on the 3D printer wind field system and the control method thereof, by setting the square rod and the elastic film, when the first gear rotates, the vertical rod is pushed to move to one side through the arc block, the vertical rod drives the rack to slide to one side, the spring is compressed, the rack drives the two second gears to rotate, the two vertical rotating rods rotate, the two square rods rotate, the two square rods drive the elastic film to rotate between the two adjusting plates, the horizontal direction of the airflow is changed, at the same time, the two adjusting plates rotate up and down, the vertical direction of the airflow is changed, the device can be changed in the horizontal and vertical directions, the direction of the airflow is more variable, the airflow can be blown to any direction of the box, the inner wall of the box is blown and cleaned, the box can keep clean, which is beneficial to reduce the influence of dust in the box on the model;

[0021] 4. The air inlet device based on the 3D printer wind field system and the control method thereof, by setting the upper air inlet and the lower air inlet, the other end of the connecting pipe is communicated with the air blower, when the airflow entering the upper air inlet is towards the model, the airflow entering from the lower air inlet is disturbed by the horizontal continuous strong airflow entering from the lower air inlet and is blown back, as shown in the figure, the airflow entering from the lower air inlet plays a certain protective role on the model, avoids the dust being blown to the model by the upper air inlet, and is beneficial to protect the model to keep clean. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the device;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the device;

[0024] Figure 3 It is a schematic diagram of the structure of the driving device;

[0025] Figure 4 It is a schematic diagram of the structure inside the square pipe;

[0026] Figure 5 It is a schematic diagram of the structure of the vertical adjusting device;

[0027] Figure 6 It is a schematic diagram of the structure of the horizontal adjusting device.

[0028] As shown in the figure: 1, box; 11, upper air inlet; 12, lower air inlet; 13, connecting pipe; 14, square through slot; 15, activated carbon adsorption cotton; 16, printing base plate; 2, vertical adjusting device; 21, horizontal rotating rod; 22, adjusting plate; 23, rubber film; 17, square pipe; 25, support rod; 26, fan; 27, filter screen; 3, driving device; 31, mounting plate; 32, motor; 33, first bevel gear; 34, second bevel gear; 35, placing groove; 4, first gear; 41, fixed plate; 42, driving gear; 43, circular block; 44, push rod; 45, circular rod; 5, horizontal adjusting device; 51, vertical rotating rod; 52, mounting block; 53, square rod; 54, elastic film; 55, rack; 56, spring; 57, second gear; 58, vertical rod; 59, arc block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Please refer to Figures 1-6 In the present embodiment: an air inlet device based on a 3D printer wind field system and a control method thereof, comprising a box 1 of the printer, one side of the box 1 is provided with an upper air inlet 11 and a lower air inlet 12, the upper air inlet 11 is provided with a vertical adjusting device 2 for adjusting the vertical wind direction, the outer side of the lower air inlet 12 is provided with a connecting pipe 13, the other end of the connecting pipe 13 is communicated with a blower, the other side of the box 1 is provided with a square through slot 14, the side wall of the square through slot 14 is fixedly connected with a flaky activated carbon adsorption cotton 15, and a printing base plate 16 is fixed on the ground in the inner cavity of the box 1.

[0031] In the present embodiment, the device is used for adjusting the airflow entering the inside of the 3D machine box. During printing, the model is formed on the printing base plate 16, and the air enters from the upper air inlet 11 and the lower air inlet 12. The airflow entering from the lower air inlet 12 is a continuous strong airflow generated by the blower. The blower is a prior art, which will not be described in detail here. The airflow directly blows to the model during printing and performs cooling treatment on the model. The environmental airflow entering from the upper air inlet 11 is continuously changed in direction on the vertical plane by the vertical adjusting device 2, blows the smoke and heat in the box 1, and is blown back when the airflow entering from the upper air inlet 11 is disturbed by the horizontal continuous strong airflow entering from the lower air inlet 12, like Figure 2The air current from the lower air inlet 12 protects the model, avoids the upper air inlet 11 from blowing dust to the model, and is beneficial to keep the model clean. The air current from the upper air inlet 11 blows the dust in the box 1 to the adsorbing cotton 15 on the other side, and the adsorbing cotton 15 wraps the dust, which is beneficial to clean the inside of the box 1.

[0032] The vertical adjusting device 2 comprises two lateral rotating rods 21, which are both rotationally connected to the side wall of the upper air inlet 11. The outer circle of the lateral rotating rod 21 is fixedly connected to the adjusting plate 22. The two adjusting plates 22 are parallel. The adjusting plate 22 is fixedly connected to the rubber film 23 between the upper and lower bottom surfaces of the upper air inlet 11. One side of the box 1 is fixedly connected to the square tube 17 at the upper air inlet 11. One end of the square tube 17 is fixedly connected to the filter screen 27. The side wall of the square tube 17 is fixedly connected to the supporting rod 25. One side of the supporting rod 25 is rotationally connected to the fan 26. The box 1 is provided with the driving device 3 at one side of the upper air outlet. The driving device 3 is used to drive the fan 26.

[0033] When the surrounding environment is relatively quiet and there is no air current, the fan 26 is driven by the driving device 3. The air current generated by the fan 26 enters the box 1 through the two adjusting plates 22. At this time, the two adjusting plates 22 are rotated to be up and down, and the direction of the air current entering the box 1 is continuously adjusted. When the air current is inclined to enter the box 1 upward, the air current directly impacts the top of the box 1, blows off the dust attached to the top of the box 1, and then the two adjusting plates 22 are rotated to be horizontal, blows the dust to the adsorbing cotton 15 on the other side, reduces the dust residue in the box 1, reduces the influence of the dust on the model, and the filter screen 27 can filter the dust in the environment to avoid the dust from the outside into the box 1 to form new dust.

[0034] The driving device 3 comprises the mounting plate 31, which is fixedly connected to the box 1. One side of the mounting plate 31 is fixedly connected to the motor 32. The main shaft of the motor 32 penetrates the mounting plate 31. The main shaft of the motor 32 penetrates the square tube 17. One end of the main shaft of the motor 32 is fixedly connected to the first bevel gear 33. One end of the driving shaft of the fan 26 is fixedly connected to the second bevel gear 34. The first bevel gear 33 is engaged with the second bevel gear 34. The box 1 is provided with the placing groove 35. The two lateral rotating rods 21 penetrate the box 1 and extend into the placing groove 35. The outer circle of the two lateral rotating rods 21 is fixedly connected to the first gear 4. The two first gears 4 are located in the placing groove 35. The side wall of the placing groove 35 is fixedly connected to the fixed plate 41. One side of the fixed plate 41 is rotationally connected to the driving gear 42. The connection part between the driving gear 42 and the fixed plate 41 is provided with the torsion spring. The outer circle of the main shaft of the motor 32 is fixedly connected to the circular block 43. The side surface of the circular block 43 is fixedly connected to the pushing rod 44. The side surface of the driving gear 42 is fixedly connected to the circular rod 45. The circular rod 45 cooperates with the pushing rod 44.

[0035] When the driving device 3 drives the fan 26, the motor 32 drives the fan 26 to rotate through the first bevel gear 33 and the second bevel gear 34, and generates airflow, at the same time, the main shaft of the motor 32 drives the circular block 43 to rotate, the circular block 43 drives the driving gear 42 to rotate through the rotating rod 45, the driving gear 42 drives the two first gears 4 to rotate in the same direction, so that the two adjusting plates 22 rotate synchronously at the same time, so that the airflow direction is changed constantly, when the rotating rod 44 is separated from the circular rod 45, under the action of the torsional spring, the driving gear 42 reversely rotates to reset, drives the two adjusting plates 22 to restore the initial inclined state, until the next time the rotating rod 44 and the circular rod 45 rotate the adjusting plate 22 to change the airflow direction, through the rotating rod 44 and the circular rod 45, the fan 26 generates airflow and the adjusting plate 22 adjusts the airflow direction synchronously, fully utilizes the impact of the airflow, the adjusting plate 22 adjusts the airflow to be fan-shaped every time, increases the impact direction of the airflow, expands the blowing angle of the airflow to the dust in the box body 1, so that the box body 1 is cleaner.

[0036] The horizontal adjusting device 5 is arranged between the vertical adjusting devices 2, and is used for adjusting the horizontal airflow direction at the upper air inlet 11. The horizontal adjusting device 5 comprises two vertical rotating rods 51, the two vertical rotating rods 51 are rotationally connected with the square tube 17, the two vertical rotating rods 51 penetrate the square tube 17 upwards, the outer circles of the two vertical rotating rods 51 are fixedly connected with mounting blocks 52, one side of each of the two mounting blocks 52 is rotationally connected with two square rods 53, torsional springs are arranged between the mounting blocks 52 and the square rods 53, the two square rods 53 arranged on the same mounting block 52 are arranged in parallel, the two square rods 53 arranged on the same mounting block 52 are fixedly connected with an elastic film 54, a rack 55 is arranged in the placing groove 35 in a sliding manner, a spring 56 is arranged between one end of the rack 55 and the side wall of the placing groove 35 in a fixed manner, the upper ends of the two vertical rotating rods 51 are fixedly connected with second gears 57, the two second gears 57 are engaged with the rack 55, and a vertical rod 58 is fixedly connected to the lower surface of the rack 55. One side of one of the first gears 4 is fixedly connected with an arc-shaped block 59, and the vertical rod 58 is located on one side of the arc-shaped block 59 and cooperates with the arc-shaped block 59.

[0037] When the first gear 4 rotates while the vertical adjusting device 2 adjusts the wind direction at the upper air inlet 11, the vertical rod 58 is pushed to move to one side by the arc block 59, the rack 55 is driven to slide to one side by the vertical rod 58, the spring 56 is compressed, the two second gears 57 are driven to rotate by the rack 55, the two vertical rotating rods 51 are rotated, the two square rods 53 are rotated, the elastic membrane 54 is rotated between the two adjusting plates 22, the horizontal direction of the air flow is changed, at the same time, the two adjusting plates 22 are rotated up and down, the vertical direction of the air flow is changed, so that the device can be changed in the horizontal and vertical directions, the direction of the air flow is more variable, the air flow can be blown to the box 1 in any direction, the inner wall of the box 1 is blown and cleaned, and the box 1 can be kept in a clean state, which is favorable for reducing the influence of dust in the box 1 on the model.

[0038] The application discloses a kind of based on 3D printer wind field system's air inlet device and its control method, process flow includes the following steps: first, air blower keeps the air flow of lower air inlet, drive device drives fan to make upper air inlet produce air flow;Second, while upper air inlet produces air flow, drive device drives vertical adjusting device to change the direction of air flow into box in up-down direction;Third, while vertical adjusting device is driven by drive device, vertical adjusting device drives horizontal adjusting device, changes the horizontal direction of air flow into box;Fourth, printing is completed, air blower and motor are closed.

[0039] The working principle and use flow of the application are as follows: the model is formed on the printing substrate 16, the wind enters from the upper air inlet 11 and the lower air inlet 12, respectively, the air flow entering from the lower air inlet 12 is the continuous strong air flow generated by the air blower, which directly blows to the model being printed to cool the model, the motor 32 drives the fan 26 to rotate through the first bevel gear 33 and the second bevel gear 34 to generate air flow, the main shaft of the motor 32 drives the circular block 43 to rotate, the circular block 43 drives the driving gear 42 to rotate by pushing the circular rod 45, the driving gear 42 drives the two first gears 4 to rotate in the same direction, so that the two adjusting plates 22 rotate simultaneously and synchronously, thereby continuously changing the vertical direction of the air flow, when the first gear 4 rotates, the vertical rod 58 is pushed to move to one side by the arc block 59, the rack 55 is driven to slide to one side by the vertical rod 58, the spring 56 is compressed, the two second gears 57 are driven to rotate by the rack 55, the two vertical rotating rods 51 are rotated, the two square rods 53 are rotated, the elastic membrane 54 is rotated between the two adjusting plates 22, the horizontal direction of the air flow is changed, and the dust is blown to the adsorbing cotton 15 on the other side.

[0040] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air inlet device based on a 3D printer wind field system, characterized in that: The utility model provides a printer's box (1), one side of the box (1) is equipped with upper air inlet (11) and lower air inlet (12), the upper air inlet (11) is equipped with vertical adjusting device (2), the vertical adjusting device (2) is used for adjusting vertical wind direction, the lower air inlet (12) outside is equipped with connecting pipe (13), the other end of connecting pipe (13) is communicated with air blower, the other side of the box (1) is equipped with square through slot (14), the side wall of square through slot (14) is fixedly connected with sheet active carbon adsorption cotton (15), the ground of the inner chamber of the box (1) is fixedly connected with printing base plate (16); The vertical adjusting device (2) includes two transverse rotating rods (21), which are both rotatably connected to the side wall of the upper air inlet (11), the outer circle of the transverse rotating rod (21) is fixedly connected with an adjusting plate (22), the two adjusting plates (22) are arranged in parallel, the adjusting plates (22) are fixedly connected with rubber membranes (23) between the upper and lower bottom surfaces of the upper air inlet (11), one side of the box (1) is fixedly connected with a square tube (17) at the upper air inlet (11), one end of the square tube (17) is fixedly connected with a filter screen (27), the side wall of the square tube (17) is fixedly connected with a supporting rod (25), one side of the supporting rod (25) is rotatably connected with a fan (26), one side of the box (1) is provided with a driving device (3) at the upper air outlet, and the driving device (3) is used for driving the fan (26); The driving device (3) includes a mounting plate (31) fixedly connected with the box (1), one side of the mounting plate (31) is fixedly connected with a motor (32), the main shaft of the motor (32) penetrates the mounting plate (31), the main shaft of the motor (32) penetrates the square tube (17), one end of the main shaft of the motor (32) is fixedly connected with a first bevel gear (33), one end of the driving shaft of the fan (26) is fixedly connected with a second bevel gear (34), and the first bevel gear (33) is engaged with the second bevel gear (34); One side of the box (1) is provided with a placing groove (35), the two transverse rotating rods (21) penetrate the box (1) and extend into the placing groove (35), the outer circles of the two transverse rotating rods (21) are fixedly connected with first gears (4), the two first gears (4) are located in the placing groove (35), the side wall of the placing groove (35) is fixedly connected with a fixed plate (41), one side of the fixed plate (41) is rotatably connected with a driving gear (42), the connecting position of the driving gear (42) and the fixed plate (41) is provided with a torsion spring, the outer circle of the main shaft of the motor (32) is fixedly connected with a circular block (43), one side of the circular block (43) is fixedly connected with a pushing rod (44), one side of the driving gear (42) is fixedly connected with a circular rod (45), and the circular rod (45) is matched with the pushing rod (44).

2. The air inlet device based on a 3D printer wind field system according to claim 1, characterized in that: The vertical adjusting device (2) is provided with a horizontal adjusting device (5), which is used for adjusting the horizontal wind direction at the upper air inlet (11). The horizontal adjusting device (5) comprises two vertical rotating rods (51), which are rotationally connected with the square tube (17). The two vertical rotating rods (51) penetrate the square tube (17) upward. The outer circles of the two vertical rotating rods (51) are fixedly connected with mounting blocks (52). The two mounting blocks (52) are rotationally connected with two square rods (53) on one side. The square rods (53) are provided with torsion springs at the connecting positions with the mounting blocks (52). The two square rods (53) on the same mounting block (52) are arranged in parallel. The two square rods (53) on the same mounting block (52) are fixedly connected with an elastic film (54).

3. The air inlet device based on a 3D printer wind field system according to claim 2, characterized in that: The rack (55) is transversely and slidably connected in the placing groove (35). The rack (55) is fixedly connected with springs (56) between one end and the side wall of the placing groove (35). The upper ends of the two vertical rotating rods (51) are fixedly connected with second gears (57). The two second gears (57) are engaged with the rack (55). The lower surface of the rack (55) is fixedly connected with a vertical rod (58). One side of the first gear (4) is fixedly connected with an arc-shaped block (59). The vertical rod (58) is located on one side of the arc-shaped block (59) and cooperates with the arc-shaped block (59).

4. A control method of an air inlet device based on a 3D printer wind field system, characterized in that: The control method comprises the following steps: Step 1: The air blower keeps the airflow of the lower air inlet, and the driving device drives the fan to generate airflow of the upper air inlet; Step 2: While the upper air inlet generates airflow, the driving device drives the vertical adjusting device to change the direction of the airflow entering the box in the up-down direction; Step 3: While the vertical adjusting device is started by the driving device, the vertical adjusting device drives the horizontal adjusting device to change the horizontal direction of the airflow entering the box; Step 4: After printing is completed, the air blower and the motor are turned off.

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