Air circulation device of printing device

Abstract

The invention is suitable for the technical field of printing equipment, and provides a printing device air circulation device which comprises a 3D printer box body, a first shell is fixedly mounted at the bottom of the 3D printer box body, and a mounting opening is formed in the bottom of the first shell; the first shell is provided with a mounting opening, the semiconductor chilling plate is arranged in the mounting opening, a first cold conducting plate is fixedly mounted on the refrigerating surface of the semiconductor chilling plate, a second cold conducting plate used for cooling gas is fixedly mounted at the top of the first cold conducting plate, and the bottom of the first cold conducting plate is fixedly connected with the inner wall of the bottom of the first shell; the radiating fin is fixedly arranged on the radiating surface of the semiconductor chilling plate; and the air circulation cooling mechanism is assembled on the 3D printer box body and is used for cooling a printed piece. According to the air circulation device of the printing device, the technical problems that in the using process of an existing 3D printing device, due to the fact that the air blowing direction of a cooling fan is fixed, cooling of a printing material is uneven, and the printing effect is easily affected are solved.

Description

Technical Field

[0001] This invention belongs to the field of printing equipment technology, and particularly relates to an air circulation device for a printing device. Background Technology

[0002] 3D printing devices are based on 3D model files and use powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. For example, when using nylon materials to print items, the material needs to be melted at high temperature and then bonded together for printing.

[0003] In existing 3D printing devices, fans are typically used to cool the molten nylon material during the printing process to ensure that the material can solidify more quickly. While the use of cooling fans can accelerate the solidification of the nylon material, the airflow direction of the fans is often fixed, resulting in uneven cooling of the nylon material and affecting the printing effect. Therefore, it is necessary to provide an air circulation device for the printing device to solve the above problems. Summary of the Invention

[0004] To address the technical problem that existing 3D printing devices suffer from uneven cooling of the printing material due to the fixed airflow direction of the cooling fan, which easily affects the printing effect, this invention provides an air circulation device for the printing device.

[0005] This invention is implemented as follows: an air circulation device for a printing apparatus includes: a 3D printer housing, a first housing fixedly mounted on the bottom of the 3D printer housing, the bottom of the first housing having an installation opening; a semiconductor cooling chip disposed within the installation opening, a first cooling plate fixedly mounted on the cooling surface of the semiconductor cooling chip, a second cooling plate fixedly mounted on the top of the first cooling plate for cooling gas, the bottom of the first cooling plate being fixedly connected to the bottom inner wall of the first housing; a heat sink fixedly mounted on the heat dissipation surface of the semiconductor cooling chip; and an air circulation cooling mechanism assembled on the 3D printer housing for cooling the printed parts.

[0006] Preferably, the air circulation cooling mechanism includes: a screw rotatably mounted on the 3D printer housing; a support leg fixedly mounted on the bottom of the 3D printer housing, with a base plate fixedly mounted at the bottom end of the support leg and a servo motor fixedly mounted on the top of the base plate, the output shaft of the servo motor being fixedly connected to the bottom end of the screw; a connecting block threaded onto the screw, with an annular tube fixedly mounted on the connecting block, and an air outlet for blowing air provided on the annular tube; and a flexible hose fixedly mounted on the annular tube, one end of the flexible hose being fixedly connected to the outer wall of the first housing, and the flexible hose being connected to the outer wall of the first housing. The first housing has internal connections, and the flexible tube is connected to the interior of the annular tube; a cover is fixedly installed on the first housing, and a fan is fixedly installed on the inner wall of the cover; a connecting tube is fixedly installed on the cover, and one end of the connecting tube extends to the outside of the 3D printer housing; a second housing is fixedly installed on the connecting tube, and an exhaust pipe is fixedly installed on the second housing, and one end of the exhaust pipe extends to the interior of the 3D printer housing; a slider is fixedly installed on the annular tube, and a sliding rod is slidably installed on the slider, with one end of the sliding rod fixedly connected to the inner wall of the 3D printer housing.

[0007] Preferably, the air circulation device of the printing apparatus further includes a gas purification mechanism installed on the second housing for filtering air.

[0008] Preferably, the gas purification mechanism includes: a rectangular opening on the second housing, a box body disposed inside the rectangular opening, a through hole at the bottom of the box body, and a handle fixedly installed on one side of the box body; and an activated carbon adsorption layer disposed inside the box body for filtering air.

[0009] Preferably, a sealing ring is fixedly installed on the inner wall of the rectangular opening, the sealing ring is in contact with the box body, and one side of the second housing is fixedly connected to the outer wall of the 3D printer box body.

[0010] Preferably, the air circulation device of the printing apparatus further includes a blower mechanism mounted on the base plate for dissipating heat from the semiconductor cooling chip and the heat sink.

[0011] Preferably, the blower mechanism includes: a first rotating shaft rotatably mounted on the top of the base plate; a first sprocket fixedly sleeved on the screw; a second sprocket fixedly sleeved on the first rotating shaft; a chain sleeved on the first sprocket and the second sprocket; a large gear fixedly sleeved on the first rotating shaft; a second rotating shaft rotatably mounted on the top of the base plate, a small gear fixedly sleeved on the second rotating shaft, the small gear meshing with the large gear; and a fan blade fixedly mounted on the top end of the second rotating shaft.

[0012] Preferably, the 3D printer housing has an outlet, and the outlet is equipped with a switch door, which is hinged to the outer wall of the 3D printer housing.

[0013] Preferably, the switch door has an observation port, and an observation window is fixedly installed on the inner wall of the observation port. The observation window is used to observe the interior of the 3D printer housing.

[0014] Preferably, a rectangular pad for anti-slip is fixedly installed on the bottom of the base plate, the rectangular pad being made of rubber material, and the annular tube being located outside the printing platform.

[0015] Compared with related technologies, the air circulation device for printing apparatus provided by the present invention has the following beneficial effects:

[0016] This solution utilizes a printing platform to provide a placement location for the layer-by-layer printed parts, allowing them to be directly formed on the platform. During printing, the thermoelectric cooler is energized, generating cooling energy on its cooling surface and transferring it to the first cooling plate. The first cooling plate then conducts the cooling energy to the second cooling plate, rapidly cooling the surrounding air. The heat generated by the thermoelectric cooler's heat dissipation surface is dissipated promptly by fixedly installed heat sinks to ensure cooling efficiency. Through a circulating cooling mechanism, air is continuously supplied from inside the 3D printer housing to the first housing. This air is cooled by the first and second cooling plates, and the cooled air evenly covers the printing area and acts on the printed parts, achieving uniform cooling. This effectively solves the technical problem in existing 3D printing devices where the fixed direction of the cooling fan leads to uneven cooling of the printing material, which easily affects printing results. Because the blown air continuously circulates within the first housing, the temperature inside the 3D printer chamber gradually decreases, further enhancing the cooling effect on the printed parts and effectively improving printing quality. The gas purification mechanism simultaneously purifies the circulating air during operation, with the activated carbon adsorption layer effectively filtering out impurities, odors, and other pollutants, reducing air pollution levels inside the 3D printer chamber. During operation, the screw on the circulating cooling mechanism synchronously drives the blower mechanism, generating airflow that directly acts on the heat dissipation surface of the thermoelectric cooler and the heat sinks fixed to it. This accelerates the airflow rate on the heat sink surface, quickly removing the large amount of heat generated by the thermoelectric cooler during operation, preventing overheating and reduced cooling efficiency due to insufficient heat dissipation. The overall heat dissipation effect is excellent. Attached Figure Description

[0017] Figure 1This is a cross-sectional structural schematic diagram of an air circulation device for a printing apparatus provided by the present invention; Figure 2 This is a schematic diagram of the external structure of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the first and second cooling plates in this invention; Figure 4 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 5 for Figure 1 An enlarged structural diagram of part B shown in the figure; Figure 6 for Figure 1 An enlarged structural diagram of section C shown in the figure; Figure 7 for Figure 1 An enlarged structural diagram of part D shown in the figure; Figure 8 for Figure 1 An enlarged structural diagram of part E shown in the figure; Figure 9 This is a schematic diagram of the assembly structure of the box body and handle in this invention; Figure 10 This is a three-dimensional structural diagram of the heat sink in this invention.

[0018] Reference numerals: 1. 3D printer housing; 2. First shell; 3. Printing platform; 4. Support leg; 5. Base plate; 6. Semiconductor cooling chip; 7. First cooling plate; 8. Second cooling plate; 9. Heat sink; 10. Screw; 11. Servo motor; 12. Connecting block; 13. Ring tube; 14. Air outlet; 15. Flexible hose; 16. Slider; 17. Slide rod; 18. Cover; 19. Fan; 20. Connecting pipe; 21. Second housing; 22. Suction pipe; 23. Box body; 24. Activated carbon adsorption layer; 25. Sealing ring; 26. First rotating shaft; 27. First sprocket; 28. Second sprocket; 29. ​​Chain; 30. Large gear; 31. Second rotating shaft; 32. Small gear; 33. Fan blade; 34. Handle; 35. Opening / closing door; 36. Observation window; 37. Through hole; 38. Rectangular opening; 39. Mounting port; 40. Rectangular pad. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification and the foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification or the foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] This invention provides an air circulation device for a printing apparatus, such as... Figure 1-10 As shown, the air circulation device of the printing apparatus includes: a 3D printer housing 1, a first housing 2 fixedly installed at the bottom of the 3D printer housing 1, and an installation port 39 at the bottom of the first housing 2; a semiconductor cooling chip 6 disposed within the installation port 39, a first cooling plate 7 fixedly installed on the cooling surface of the semiconductor cooling chip 6, a second cooling plate 8 for cooling gas fixedly installed on the top of the first cooling plate 7, and the bottom of the first cooling plate 7 fixedly connected to the bottom inner wall of the first housing 2; a heat sink 9 fixedly installed on the heat dissipation surface of the semiconductor cooling chip 6; and an air circulation cooling mechanism assembled on the 3D printer housing 1 for cooling the printed parts.

[0022] In this design, during printing, the printed parts are printed layer by layer on the printing platform 3. During printing, the thermoelectric cooler 6 is powered on, and its cooling surface generates cold energy, which is transferred to the first cooling plate 7. The first cooling plate 7 conducts the cold energy to the second cooling plate 8, causing the gas around the second cooling plate 8 to cool down rapidly. The heat generated by the heat dissipation surface of the thermoelectric cooler 6 is dissipated in time through the fixedly installed heat sink 9 to ensure cooling efficiency. At the same time, the air circulation cooling mechanism is also activated. After the air circulation cooling mechanism is activated, it continuously delivers air from the 3D printer housing 1 to the first housing 2. The air entering the first housing 2 is cooled by the first cooling plate 7 and the second cooling plate 8. The cooled air evenly covers the printing area and acts on the printed parts, achieving uniform cooling of the printed parts. Since the blown air continuously circulates in the first housing 2, the temperature inside the 3D printer housing 1 can be gradually reduced, which can further improve the cooling effect on the printed parts and effectively improve the printing effect.

[0023] In a further preferred embodiment of the present invention, the air circulation cooling mechanism includes: a screw 10 rotatably mounted on the 3D printer housing 1; a support leg 4 fixedly mounted on the bottom of the 3D printer housing 1, a base plate 5 fixedly mounted on the bottom end of the support leg 4, a servo motor 11 fixedly mounted on the top of the base plate 5, and the output shaft of the servo motor 11 fixedly connected to the bottom end of the screw 10; a connecting block 12 threaded onto the screw 10, an annular tube 13 fixedly mounted on the connecting block 12, and an air outlet 14 for blowing air provided on the annular tube 13; and a flexible hose 15 fixedly mounted on the annular tube 13, one end of the flexible hose 15 being fixedly connected to the outer wall of the first housing 2, and the flexible hose 15 being connected to the... The interior of the first housing 2 is connected, and the hose 15 is connected to the interior of the annular tube 13; a cover 18 is fixedly installed on the first housing 2, and a fan 19 is fixedly installed on the inner wall of the cover 18; a connecting pipe 20 is fixedly installed on the cover 18, and one end of the connecting pipe 20 extends to the outside of the 3D printer housing 1; a second housing 21 is fixedly installed on the connecting pipe 20, and an exhaust pipe 22 is fixedly installed on the second housing 21, and one end of the exhaust pipe 22 extends to the interior of the 3D printer housing 1; a slider 16 is fixedly installed on the annular tube 13, and a sliding rod 17 is slidably installed on the slider 16, and one end of the sliding rod 17 is fixedly connected to the inner wall of the 3D printer housing 1.

[0024] In this embodiment, the air circulation cooling mechanism is used to cool the printed parts. When the air circulation cooling mechanism is in use, the servo motor 11 is started, and its output shaft drives the fixedly connected screw 10 to rotate. Since the connecting block 12 is threaded on the screw 10 and the annular tube 13 is fixedly installed on the connecting block 12, the rotation of the screw 10 will cause the connecting block 12 to move up and down, thereby driving the annular tube 13 and the air outlet 14 on the annular tube 13 to rise and fall synchronously. At this time, the slider 16 connected to the annular tube 13 will slide on the slider 17 at the same time. During the rising and falling process, the fan 19 also needs to be started. After the fan 19 is started, it will deliver air into the first housing 2 through the cover 18. The air entering the first housing 2 will be cooled by the first cooling plate 7 and the second cooling plate 8. The cooled air flows into the annular pipe 13 through the hose 15. The air entering the annular pipe 13 is blown towards the printing area from the air outlet 14 on the annular pipe 13. Since the air outlet 14 moves up and down during the blowing process, the blowing range of the air outlet 14 can effectively cover different height areas of the printed parts, so that the cooled air can be blown evenly on the surface of the printed parts, achieving uniform cooling of the printed parts and effectively improving the printing effect. With the use of the fan 19, the suction pipe 22 will also generate negative pressure, which will draw the blown air into the second housing 21. After being purified by the purification mechanism, it will enter the cover 18 through the connecting pipe 20, thereby realizing the recycling of air and effectively reducing the waste of cold air.

[0025] In a further preferred embodiment of the present invention, the air circulation device of the printing device further includes a gas purification mechanism installed on the second housing 21 for filtering air.

[0026] In this embodiment, the air entering the second housing 21 can be purified by using a purification mechanism, thereby reducing the residue of pollutants.

[0027] In a further preferred embodiment of the present invention, the gas purification mechanism includes: a rectangular opening 38 formed on the second housing 21, a box 23 disposed inside the rectangular opening 38, a through hole 37 formed at the bottom of the box 23, a handle 34 fixedly installed on one side of the box 23; and an activated carbon adsorption layer 24 disposed inside the box 23 for filtering air.

[0028] In this embodiment, when the gas purification mechanism is in use, the airflow generated by the fan 19 drives the suction pipe 22 to draw gas from the 3D printer housing 1 into the second housing 21. The gas entering the second housing 21 is filtered by the activated carbon adsorption layer 24 inside the housing 23 to remove impurities, odors, and other pollutants. The filtered gas is discharged from the through hole 37 at the bottom of the housing 23, and then enters the cover 18 through the connecting pipe 20. The gas entering the cover 18 is discharged into the first housing 2 by the fan 19, and then enters the annular pipe 13 through the flexible hose 15, and then exits from the air outlet 1 on the annular pipe 13. 4. The process of exhausting and circulating the air repeatedly can filter and remove pollutants in the air while cooling the printed parts. When the activated carbon adsorption layer 24 needs to be replaced due to prolonged use, the box 23 can be easily pulled out from the rectangular opening 38 by using the handle 34 to replace or clean the activated carbon adsorption layer 24. After replacement, the box 23 can be inserted back into the rectangular opening 38. The replacement is convenient and can ensure a stable gas purification effect. While maintaining the closed-loop air circulation cooling function, it ensures the cleanliness of the cooling airflow and avoids a large amount of pollutants in the gas remaining in the 3D printer housing 1.

[0029] In a further preferred embodiment of the present invention, a sealing ring 25 is fixedly installed on the inner wall of the rectangular opening 38, the sealing ring 25 is in contact with the box body 23, and one side of the second housing 21 is fixedly connected to the outer wall of the 3D printer box 1.

[0030] In this embodiment, the use of the sealing ring 25 can effectively seal the gap between the box body 23 and the rectangular opening 38, thereby effectively preventing gas leakage from the gap between the box body 23 and the rectangular opening 38 when the activated carbon adsorption layer 24 is used to purify pollutants in the air, so as to prevent the air carrying pollutants from leaking into the air outside the device. By fixing one side of the second housing 21 to the outer wall of the 3D printer box 1, the second housing 21 can be effectively supported to prevent instability caused by fixing it through the connecting pipe 20 and the air extraction pipe 22.

[0031] In a further preferred embodiment of the present invention, the air circulation device of the printing apparatus further includes a blower mechanism mounted on the base plate 5 for dissipating heat from the semiconductor cooling chip 6 and the heat sink 9.

[0032] In this embodiment, by activating the blower mechanism mounted on the base plate 5, the directional airflow generated directly acts on the heat sink 9 fixed on the heat dissipation surface of the thermoelectric cooler 6, accelerating the airflow on the surface of the heat sink 9, and quickly removing the large amount of heat generated by the heat dissipation surface of the thermoelectric cooler 6 during operation. This avoids the problem of reduced cooling efficiency caused by the thermoelectric cooler 6 due to excessive temperature due to untimely heat dissipation, thereby ensuring that the cooling surface of the thermoelectric cooler 6 can continuously and stably transfer the cold energy to the first cooling plate 7. The first cooling plate 7 then conducts the cold energy to the second cooling plate 8 at the top to cool the surrounding air, thus ensuring the stability of the thermoelectric cooler 6 during use.

[0033] In a further preferred embodiment of the present invention, the blower mechanism includes: a first rotating shaft 26 rotatably mounted on the top of the base plate 5; a first sprocket 27 fixedly sleeved on the screw 10; a second sprocket 28 fixedly sleeved on the first rotating shaft 26; a chain 29 sleeved on the first sprocket 27 and the second sprocket 28; a large gear 30 fixedly sleeved on the first rotating shaft 26; a second rotating shaft 31 rotatably mounted on the top of the base plate 5, a small gear 32 fixedly sleeved on the second rotating shaft 31, the small gear 32 meshing with the large gear 30; and a fan blade 33 fixedly mounted on the top end of the second rotating shaft 31.

[0034] In this embodiment, when the blower mechanism is in use, while the servo motor 11 drives the screw 10 to rotate, the screw 10 simultaneously drives the first sprocket 27 to rotate. Since the chain 29 is sleeved on the first sprocket 27 and the second sprocket 28, the first sprocket 27 can drive the second sprocket 28 to rotate via the chain 29. The second sprocket 28 will drive the first rotating shaft 26, which is rotatably mounted on the top of the base plate 5, to rotate. During the rotation of the first rotating shaft 26, it will drive the large gear 30 to rotate synchronously, and the small gear 32, which meshes with the large gear 30, will also rotate simultaneously. The small gear 32 will drive the second rotating shaft 31 to rotate on the top of the base plate 5. Since the large gear 30 can increase the rotation speed of the small gear 32, ... The second rotating shaft 31 enables the fan blades 33 to rotate rapidly, generating airflow. This airflow directly acts on the heat dissipation surface of the thermoelectric cooler 6 and the heat sink 9 fixed thereon, accelerating the airflow rate on the surface of the heat sink 9. This quickly removes the large amount of heat generated by the thermoelectric cooler 6 during operation, preventing the thermoelectric cooler 6 from overheating due to insufficient heat dissipation and resulting in reduced cooling efficiency. The heat dissipation effect is good, and it can continuously provide stable heat dissipation for the thermoelectric cooler 6 and the heat sink 9, ensuring that the cooling surface of the thermoelectric cooler 6 can continuously and efficiently transfer cold energy to the first cooling plate 7 and the second cooling plate 8, laying the foundation for stable cooling of the air circulation cooling mechanism.

[0035] In a further preferred embodiment of the present invention, the 3D printer housing 1 is provided with an outlet, and the outlet is provided with a switch door 35, which is hinged to the outer wall of the 3D printer housing 1.

[0036] In this embodiment, the outlet on the 3D printer housing 1 provides an operating channel for placing the printing substrate and removing the printed part. Since the switch door 35 is hinged to the outer wall of the 3D printer housing 1, the outlet can be opened and closed by rotating the switch door 35 around the hinge point. Before printing, the switch door 35 is opened to place the printing substrate into the printing area inside the 3D printer housing 1. Then, the switch door 35 is closed to form a relatively sealed space in the 3D printer housing 1, which prevents the cooling airflow from leaking from the outlet when the air circulation cooling mechanism is working, ensures the stability of the closed-loop airflow in the 3D printer housing 1, and ensures that the cooling airflow can be concentrated on the printing area to achieve uniform cooling. After printing, the switch door 35 is rotated again to open the outlet, and the formed printed part can be easily removed. The hinge structure ensures both the flexibility of opening and closing the switch door 35 and the sealing after closing, which is suitable for the use needs of the entire printing process.

[0037] In a further preferred embodiment of the present invention, an observation port is provided on the switch door 35, and an observation window 36 is fixedly installed on the inner wall of the observation port. The observation window 36 is used to observe the interior of the 3D printer housing 1.

[0038] In this embodiment, the observation port on the switch door 35 provides a convenient way to observe the printing process inside the 3D printer housing 1. The observation window 36, fixedly installed on the inner wall of the observation port, is light-transmitting and does not affect the sealing of the 3D printer housing 1. This allows operators to clearly observe the molding progress, surface condition, and cooling airflow of the printed parts inside the 3D printer housing 1 through the observation window 36 without opening the switch door 35. This avoids temperature fluctuations and cooling airflow leakage inside the 3D printer housing 1 caused by frequent opening and closing of the switch door 35, thereby ensuring the cooling effect of the air circulation cooling mechanism and the molding quality of the printed parts. At the same time, the fixed installation structure of the observation window 36 ensures its stability and reliability during device operation, continuously providing support for real-time observation of the printing process.

[0039] In a further preferred embodiment of the present invention, a rectangular pad 40 for anti-slip is fixedly installed on the bottom of the base plate 5. The rectangular pad 40 is made of rubber material, and the annular tube 13 is located outside the printing platform 3.

[0040] In this embodiment, the rectangular pad 40 fixedly installed at the bottom of the base plate 5 is made of rubber material, which has good anti-slip and elasticity, and can increase the friction between the base plate 5 and the placement surface. This effectively prevents the device from sliding due to vibrations caused by the operation of the servo motor 11 and the rotation of the fan blade 33 during operation. At the same time, the buffering effect of the rubber material can absorb some vibration energy, ensuring the installation stability and operating accuracy of components such as the support leg 4, servo motor 11, and first rotating shaft 26 on the base plate 5. The annular tube 13 is located outside the printing platform 3, which not only avoids interference between the annular tube 13 and the printing platform 3 or the printed parts on it when the annular tube 13 moves up and down with the connecting block 12 along the screw 10, but also allows the air outlet 14 on the annular tube 13 to form an annular blowing range around the printing platform 3. With the position adjustment function driven by the servo motor 11, the cooling clean airflow delivered by the hose 15 is evenly blown from the outside of the printing platform 3 to all parts of the printed parts, ensuring that the cooling airflow covers the entire area without affecting the normal operation of the printing platform 3, achieving uniform cooling of the printed parts, and further improving the printing quality.

[0041] In summary, compared with related technologies, this solution, through the use of the printing platform 3, provides a placement position for the layer-by-layer printed parts, allowing the printed parts to be directly formed on the printing platform 3. During the printing process, the semiconductor cooling chip 6 is energized, and its cooling surface generates cold energy, which is transferred to the first cooling plate 7. The first cooling plate 7 conducts the cold energy to the second cooling plate 8, causing the gas around the second cooling plate 8 to cool down rapidly. The heat generated by the heat dissipation surface of the semiconductor cooling chip 6 is dissipated in a timely manner through the fixedly installed heat sink 9 to ensure cooling efficiency. Through the use of the circulating cooling mechanism, air inside the 3D printer housing 1 can be continuously transported to the first housing 2. The air entering the first housing 2 is cooled by the first cooling plate 7 and the second cooling plate 8. The cooled air evenly covers the printing area and acts on the printed parts, achieving uniform cooling of the printed parts. This effectively solves the problem that in existing 3D printing devices, the fixed airflow direction of the cooling fan leads to uneven cooling of the printing material, which can easily affect printing. Regarding the technical issues of printing effect, since the blown air continuously circulates within the first housing 2, the temperature inside the 3D printer housing 1 gradually decreases, further improving the cooling effect on the printed parts and effectively enhancing the printing effect. Through the use of a gas purification mechanism, the circulating air is simultaneously purified during the operation of the circulating cooling mechanism. The activated carbon adsorption layer 24 in the gas purification mechanism effectively filters and removes impurities, odors, and other pollutants from the gas, reducing air pollution levels inside the 3D printer housing 1. During the operation of the circulating cooling mechanism, the screw 10 on the circulating cooling mechanism synchronously drives the blower mechanism, enabling it to generate airflow. This airflow directly acts on the heat dissipation surface of the semiconductor cooling chip 6 and the heat sink 9 fixed thereon, accelerating the airflow rate on the surface of the heat sink 9 and quickly removing the large amount of heat generated by the semiconductor cooling chip 6 during operation. This prevents the semiconductor cooling chip 6 from overheating due to insufficient heat dissipation, resulting in reduced cooling efficiency and a better heat dissipation effect.

[0042] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An air circulation device for a printing apparatus, characterized in that, include: 3D printer housing (1), the bottom of which is fixedly installed with a first shell (2), and the bottom of the first shell (2) is provided with an installation port (39). A semiconductor cooling chip (6) is disposed in the mounting port (39). A first cooling plate (7) is fixedly mounted on the cooling surface of the semiconductor cooling chip (6). A second cooling plate (8) for cooling gas is fixedly mounted on the top of the first cooling plate (7). The bottom of the first cooling plate (7) is fixedly connected to the bottom inner wall of the first housing (2). Heat sink (9) is fixedly installed on the heat dissipation surface of the semiconductor cooling chip (6); An air circulation cooling mechanism for cooling the printed parts is mounted on the 3D printer housing (1).

2. The air circulation device for the printing apparatus as described in claim 1, characterized in that, The air circulation cooling mechanism includes: Rotate the screw (10) mounted on the 3D printer housing (1). A support leg (4) is fixedly installed at the bottom of the 3D printer housing (1). A base plate (5) is fixedly installed at the bottom end of the support leg (4). A servo motor (11) is fixedly installed at the top of the base plate (5). The output shaft of the servo motor (11) is fixedly connected to the bottom end of the screw (10). A connecting block (12) is threaded onto the screw (10), and an annular tube (13) is fixedly installed on the connecting block (12). An air outlet (14) for blowing air is provided on the annular tube (13). A flexible hose (15) is fixedly installed on the annular tube (13). One end of the flexible hose (15) is fixedly connected to the outer wall of the first housing (2). The flexible hose (15) is connected to the interior of the first housing (2). The flexible hose (15) is connected to the interior of the annular tube (13). A cover (18) is fixedly installed on the first housing (2), and a fan (19) is fixedly installed on the inner wall of the cover (18). A connecting pipe (20) is fixedly installed on the cover (18), one end of which extends to the outside of the 3D printer housing (1); A second housing (21) is fixedly installed on the connecting pipe (20), and an air extraction pipe (22) is fixedly installed on the second housing (21). One end of the air extraction pipe (22) extends into the interior of the 3D printer housing (1). A slider (16) is fixedly installed on the annular tube (13), and a slide rod (17) is slidably installed on the slider (16). One end of the slide rod (17) is fixedly connected to the inner wall of the 3D printer housing (1).

3. The air circulation device for the printing apparatus as described in claim 2, characterized in that, The air circulation device of the printing device also includes a gas purification mechanism installed on the second housing (21) for filtering air.

4. The air circulation device for the printing apparatus as described in claim 3, characterized in that, The gas purification mechanism includes: A rectangular opening (38) is provided on the second housing (21), and a box body (23) is provided inside the rectangular opening (38). A through hole (37) is provided at the bottom of the box body (23), and a handle (34) is fixedly installed on one side of the box body (23). An activated carbon adsorption layer (24) for filtering air is disposed inside the housing (23).

5. The air circulation device for the printing apparatus as described in claim 4, characterized in that, A sealing ring (25) is fixedly installed on the inner wall of the rectangular opening (38), and the sealing ring (25) is in contact with the box body (23). One side of the second shell (21) is fixedly connected to the outer wall of the 3D printer box body (1).

6. The air circulation device for the printing apparatus as described in claim 2, characterized in that, The air circulation device of the printing device also includes a blower mechanism mounted on the base plate (5) for dissipating heat from the semiconductor cooling chip (6) and the heat sink (9).

7. The air circulation device for the printing apparatus as described in claim 6, characterized in that, The blower mechanism includes: Rotate the first rotating shaft (26) mounted on the top of the base plate (5); The first sprocket (27) is fixedly sleeved on the screw (10); A second sprocket (28) is fixedly sleeved on the first rotating shaft (26); Chain (29) fitted on the first sprocket (27) and the second sprocket (28); A large gear (30) is fixedly sleeved on the first rotating shaft (26); A second rotating shaft (31) is rotatably mounted on the top of the base plate (5). A small gear (32) is fixedly sleeved on the second rotating shaft (31), and the small gear (32) meshes with the large gear (30). Fan blades (33) are fixedly installed at the top of the second rotating shaft (31).

8. The air circulation device for the printing apparatus as described in claim 1, characterized in that, The 3D printer housing (1) has an outlet, and the outlet is equipped with a switch door (35), which is hinged to the outer wall of the 3D printer housing (1).

9. The air circulation device for the printing apparatus as described in claim 8, characterized in that, An observation port is provided on the switch door (35), and an observation window (36) is fixedly installed on the inner wall of the observation port. The observation window (36) is used to observe the interior of the 3D printer housing (1).

10. The air circulation device for the printing apparatus as described in claim 2, characterized in that, A rectangular pad (40) for anti-slip is fixedly installed on the bottom of the base plate (5). The rectangular pad (40) is made of rubber material. The annular tube (13) is located outside the printing platform (3).

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