Three-dimensional printer

Abstract

The utility model discloses a three-dimensional printer, relates to the technical field of three-dimensional printing, and mainly aims to reduce noise generated when the machine works. According to the main technical scheme, the three-dimensional printer comprises a base and a printing assembly, the printing assembly is arranged on the base, and a light source assembly, a heat dissipation piece, a first air channel structure, a first draught fan, a second air channel structure and a second draught fan are arranged in the base; the light source assembly is connected with the heat dissipation piece. The first air duct structure comprises a first air duct structure opening and a second air duct structure opening, the first air duct structure opening is connected with the first fan, and the second air duct structure opening is connected with the first end of the heat dissipation piece; the second air duct structure comprises a third air duct structure opening and a fourth air duct structure opening, the third air duct structure opening is connected with the second end of the heat dissipation piece, and the fourth air duct structure opening is connected with the second draught fan.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and more particularly, to a 3D printer. Background Art

[0002] A stereolithography 3D printer generally applies light to a photosensitive material through a light source, so that the liquid photosensitive material is cured into a 3D solid model.

[0003] Regarding the problem of heat generated when the light source works, in the related art, multiple fans usually work together, that is, multiple fans are used to dissipate heat from the light source together, so as to reduce the working temperature of the whole machine and maintain the normal working temperature of the whole machine.

[0004] However, since multiple fans work together, it is easy to cause a large amount of noise when the machine is working. Summary of the Utility Model

[0005] In view of this, an embodiment of the present utility model provides a 3D printer, and the main purpose is to reduce the noise generated when the machine is working.

[0006] To achieve the above object, the present utility model mainly provides the following technical solutions:

[0007] An embodiment of the present utility model provides a 3D printer, including:

[0008] A base and a printing component, the printing component is arranged on the base, and a light source component, a heat dissipation component, a first air duct structure, a first fan, a second air duct structure and a second fan are arranged inside the base;

[0009] The light source component is connected to the heat dissipation component;

[0010] The first air duct structure includes a first air duct structure port and a second air duct structure port, the first air duct structure port is connected to the first fan, and the second air duct structure port is connected to the first end of the heat dissipation component;

[0011] The second air duct structure includes a third air duct structure port and a fourth air duct structure port, the third air duct structure port is connected to the second end of the heat dissipation component, and the fourth air duct structure port is connected to the second fan.

[0012] Optionally, the first end of the heat dissipation component extends into the first air duct structure through the second air duct structure port;

[0013] The second end of the heat dissipation component extends into the second air duct structure through the third air duct structure port.

[0014] Optionally, the heat dissipation member includes a substrate and a plurality of heat dissipation fins disposed on the substrate, and the heat dissipation fins extend in a direction from the first end to the second end.

[0015] Optionally, the direction from the first end to the second end is the first direction;

[0016] Both the first air duct structure and the second air duct structure are arranged to extend in the first direction; or at least one of the first air duct structure and the second air duct structure extends in a second direction, and the second direction is different from the first direction.

[0017] Optionally, the first fan and the second fan are disposed on opposite sides of the base; or the first fan and the second fan are disposed on adjacent sides of the base.

[0018] Optionally, the first air duct structure is a pipe structure; and / or the second air duct structure is a pipe structure.

[0019] Optionally, the first air duct structure, the heat dissipation member, and the second air duct structure divide the internal space of the base into a first base space and a second base space;

[0020] The first air duct structure is a semi-open structure, and the first air duct structure communicates with the first base space and / or the second base space; and / or,

[0021] The second air duct structure is a semi-open structure, and the second air duct structure communicates with the first base space and / or the second base space.

[0022] Optionally, the first fan is an intake fan and the second fan is an exhaust fan.

[0023] Optionally, the light source assembly includes a light source and a reflector, the light source is connected to the heat dissipation member, the reflector includes a reflecting surface, and the reflecting surface is disposed opposite to the light source;

[0024] The first air duct structure, the heat dissipation member, and the second air duct structure enclose a receiving cavity, and the reflecting surface and the light source are located in the receiving cavity.

[0025] Optionally, the first air duct structure includes a duct body and a shielding member, the duct body includes the first air duct structure opening and the second air duct structure opening; one end of the shielding member abuts against the duct body, and the other end of the shielding member extends to the side of the reflector;

[0026] The duct body, the shielding member, the heat dissipation member, and the second air duct structure enclose the receiving cavity.

[0027] Optionally, the heat dissipation member includes a heat dissipation surface opposite to the reflection surface. The heat dissipation surface includes a first surface and a second surface located on both sides of the light source.

[0028] The first air duct structure covers the first surface, and the second air duct structure covers the second surface.

[0029] Optionally, the 3D printer further includes:

[0030] A mounting plate, on which the first air duct structure, the second air duct structure, the heat dissipation member and the light source assembly are all arranged.

[0031] Optionally, the 3D printer further includes:

[0032] At least one first mounting post and at least one second mounting post. One end of the first mounting post is connected to the mounting plate, and the other end of the first mounting post penetrates through the bottom end and the top end of the first air duct structure. One end of the second mounting post is connected to the mounting plate, and the other end of the second mounting post penetrates through the bottom end and the top end of the second air duct structure.

[0033] By means of the above technical solutions, the present utility model has at least the following beneficial effects:

[0034] In the 3D printer provided by the embodiment of the present utility model, for example, the first fan can be an intake fan, and the second fan can be an exhaust fan. The first fan is connected to the first air duct structure port of the first air duct structure. The second air duct structure port of the first air duct structure is connected to the first end of the heat dissipation member. The second fan is connected to the fourth air duct structure port of the second air duct structure. The third air duct structure port of the second air duct structure is connected to the second end of the heat dissipation member. When the first fan and the second fan are started, the cold air flow with a lower temperature blown by the first fan can be almost entirely blown towards the heat dissipation member under the guiding action of the first air duct structure, so that the cold air flow can contact the heat dissipation member to the greatest extent to better exchange heat with the heat dissipation member. Under the action of the second fan, the heated air flow after heat exchange is almost entirely discharged via the second fan under the guiding action of the second air duct structure. Thereby, the heat dissipation efficiency and heat dissipation effect of the heat dissipation member are improved, the number of fans used is reduced, the generation of turbulent flow is reduced, and the noise generated during the operation of the machine is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the base of a 3D printer provided by an embodiment of the present utility model from a first perspective;

[0036] Figure 2 It is a schematic structural diagram of the base of a 3D printer provided by an embodiment of the present utility model from a second perspective;

[0037] Figure 3 A structural schematic diagram of a 3D printer provided by an embodiment of the present utility model.

[0038] Explanation of reference numerals in the drawings:

[0039] 1 - Heat dissipation component; 11 - Heat dissipation fins; 2 - First air duct structure; 21 - Air duct body; 22 - Blocking member; 3 - First fan; 4 - Second air duct structure; 5 - Second fan; 6 - Light source assembly; 61 - Light source; 62 - Reflecting member; 621 - Reflecting surface; 7 - Mounting plate; 8 - First mounting column; 9 - Second mounting column; 100 - Base; 101 - First base space; 102 - Second base space; 200 - Printing assembly. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the drawings in the preferred embodiments of the present utility model.

[0041] As Figure 1 、 Figure 2 and Figure 3 shown, an embodiment of the present utility model provides a 3D printer, including a base 100 and a printing assembly 200. The printing assembly 200 is disposed on the base 100. Inside the base 100, there are provided a light source assembly 6, a heat dissipation component 1, a first air duct structure 2, a first fan 3, a second air duct structure 4, and a second fan 5. The light source assembly 6 is connected to the heat dissipation component 1. The first air duct structure 2 includes a first air duct structure opening and a second air duct structure opening. The first air duct structure opening is connected to the first fan 3, and the second air duct structure opening is connected to the first end of the heat dissipation component 1. The second air duct structure 4 includes a third air duct structure opening and a fourth air duct structure opening. The third air duct structure opening is connected to the second end of the heat dissipation component 1, and the fourth air duct structure opening is connected to the second fan 5. It can be understood that air vents can be opened at positions on the base 100 corresponding to the first fan 3 and the second fan 5.

[0042] In the 3D printer provided by the embodiment of the present utility model, the first fan 3 can be an intake fan, and the second fan 5 can be an exhaust fan. The first fan 3 is connected to the first air duct structure port of the first air duct structure 2. The second air duct structure port of the first air duct structure 2 is connected to the first end of the heat sink 1. The second fan 5 is connected to the fourth air duct structure port of the second air duct structure 4. The third air duct structure port of the second air duct structure 4 is connected to the second end of the heat sink 1. When the first fan 3 and the second fan 5 are started, the cold air flow generated by the first fan 3 can be almost entirely blown towards the heat sink 1 under the guiding action of the first air duct structure 2, enabling the cold air flow to maximally contact the heat sink 1 to better exchange heat with the heat sink 1. Under the action of the second fan 5, the heated air flow after heat exchange is almost entirely discharged via the second fan 5 under the guiding action of the second air duct structure 4, thereby improving the heat dissipation efficiency and heat dissipation effect of the heat sink 1, reducing the number of fans used, thus reducing the generation of turbulence, and further reducing the noise generated during the operation of the machine. In some other embodiments, the first fan 3 can be an exhaust fan, and the second fan 5 can be an intake fan.

[0043] In some embodiments, referring to Figure 1 and Figure 2 , the first end of the heat sink 1 can extend into the first air duct structure 2 via the second air duct structure port; the second end of the heat sink 1 can extend into the second air duct structure 4 via the third air duct structure port. That is to say, both the first air duct structure 2 and the second air duct structure 4 wrap the heat sink 1, which is more conducive to all the cold air flow generated by the first fan 3 being blown towards the heat sink 1, and all the heated air flow after heat exchange being discharged via the second air duct structure 4, thereby further improving the heat dissipation efficiency and heat dissipation effect of the heat sink 1.

[0044] In some embodiments, the heat sink 1 can include a substrate and a plurality of heat dissipation fins 11 provided on the substrate, and the heat dissipation fins 11 extend in the direction from the first end to the second end.

[0045] A heat dissipation channel can be formed between two adjacent heat dissipation fins 11. Since the plurality of heat dissipation fins 11 extend in the direction from the first end to the second end, one end of the heat dissipation channel can communicate with the first air duct structure 2, and the other end of the heat dissipation channel can communicate with the second air duct structure 4, so that the cold air flow generated by the first fan 3 can directly flow into the heat dissipation channel via the first air duct structure 2, and the heated air flow after heat exchange can be directly discharged from the second fan 5 via the second air duct structure 4, thereby further improving the heat dissipation efficiency and heat dissipation effect of the heat sink 1.

[0046] Among them, the substrate can be connected to a heating element, such as the light source 61, so that the generated heat can be directly conducted to the substrate and then conducted to the air through a plurality of heat dissipation fins 11. The substrate and the heat dissipation fins 11 can be made of materials with good heat conduction performance, such as steel, aluminum or copper, etc.; moreover, the substrate and the heat dissipation fins 11 can be integrally processed and formed.

[0047] In some embodiments, the direction from the first end of the heat dissipation member 1 to the second end of the heat dissipation member 1 is the first direction; both the first air duct structure 2 and the second air duct structure 4 extend along the first direction; or, refer to Figure 1 and Figure 2 , at least one of the first air duct structure 2 and the second air duct structure 4 extends along a second direction, and the second direction is different from the first direction.

[0048] Among them, for both the first air duct structure 2 and the second air duct structure 4 extending along the first direction, it is convenient for the cold air flow generated by the first fan 3 to blow towards the heat dissipation member 1. At the same time, it is also convenient for the hot air flow after heat exchange with the heat dissipation member 1 to be discharged through the second air duct structure 4.

[0049] For at least one of the first air duct structure 2 and the second air duct structure 4 extending along the second direction, for example, the second direction is perpendicular to the first direction. In this way, the dimensions of the first air duct structure 2, the heat dissipation member 1, and the second air duct structure 4 in the first direction can be reduced, thereby reducing the occupied space. Without affecting the heat dissipation effect of the heat dissipation member 1, installation space is provided for the installation of other components, making it more convenient to use.

[0050] In some embodiments, the first fan 3 and the second fan 5 are arranged on opposite sides of the base 100; or, the first fan 3 and the second fan 5 are arranged on adjacent sides of the base 100.

[0051] Among them, the first fan 3 and the second fan 5 are arranged on opposite sides of the base 100, so that the first fan 3 and the second fan 5 are arranged opposite to each other to make the air inlet direction and the air extraction direction in the base 100 the same. In this way, the flow resistance of the air flow during heat dissipation can be reduced, thereby further reducing the generation of turbulence and reducing the noise generated during the operation of the machine; moreover, it is also convenient for the cold air flow generated by the first fan to be quickly extracted from the base 100 by the second fan after heat exchange with the heat dissipation member, further improving the heat dissipation efficiency and heat dissipation effect of the heat dissipation member 1.

[0052] In some embodiments, the first air duct structure can be a pipe structure; and / or, the second air duct structure can be a pipe structure.

[0053] If the first air duct structure 2 is a pipe structure, a closed space can be formed between the heat sink 1 and the first fan 3, and the cold air flow generated by the first fan 3 can be almost entirely directly blown towards the heat sink 1 through this closed space, further improving the heat dissipation efficiency and effect of the heat sink 1.

[0054] If the second air duct structure 2 is a pipe structure, a closed space can be formed between the heat sink 1 and the second fan 5, and the hot air flow after heat exchange can be almost entirely drawn away by the second fan 5 through this closed space, further improving the heat dissipation efficiency and effect of the heat sink 1.

[0055] In some embodiments, referring to Figure 2 , the first air duct structure 2, the heat sink 1 and the second air duct structure 4 divide the internal space of the base 100 into a first base space 101 and a second base space 102; the first air duct structure 2 can be a semi-open structure, and the first air duct structure 2 communicates with the first base space 101 and / or the second base space 102; and / or, the second air duct structure 4 can be a semi-open structure, and the second air duct structure 4 communicates with the first base space 101 and / or the second base space 102.

[0056] Wherein, if the first air duct structure 2 can be a semi-open structure, the cold air flow generated by the first fan 3 can not only be blown towards the heat sink 1, but also be blown towards the first base space 101 and / or the second base space 102, thus facilitating the heat dissipation and cooling of the entire space inside the base 100.

[0057] In some embodiments, referring to Figure 1 and Figure 2 , the light source 61 assembly 6 can include a light source 61 and a reflector 62, the light source 61 is connected to the heat sink 1, the reflector 62 includes a reflecting surface 621, and the reflecting surface 621 is disposed opposite to the light source 61; the first air duct structure 2, the heat sink 1 and the second air duct structure 4 enclose an accommodation cavity, and the reflecting surface 621 and the light source 61 are located inside the accommodation cavity.

[0058] Wherein, the curing light emitted by the light source 61 can be projected onto the reflecting surface 621 of the reflector 62, and after being reflected by the reflecting surface 621, it is projected into the material tank of the 3D printer to cure the material to be cured in the material tank.

[0059] In the above embodiments, the reflecting surface 621 and the light source 61 are located in the accommodation cavity surrounded by the first air duct structure 2, the heat dissipation member 1, and the second air duct structure 4, so that the light propagation space between the light source 61 and the reflecting member 62 is surrounded by the accommodation cavity, thereby isolating the light propagation space from the outside world, preventing the curing light from leaking to the outside and causing light pollution outside the device; moreover, it can also prevent external dust and other impurities from entering the device and affecting the core components such as the light source 61 and the reflecting member 62, thereby ensuring the normal optical path propagation between the light source 61 and the reflecting member 62, as well as the stable operation of other core components.

[0060] In some embodiments, referring to Figure 2 , the first air duct structure 2 may include an air duct body 21 and a shielding member 22. The air duct body 21 includes a first air duct structure opening and a second air duct structure opening; one end of the shielding member 22 abuts against the air duct body 21, and the other end of the shielding member 22 extends to the side of the reflecting member 62. The shielding member 22, the air duct body 21, the heat dissipation member 1, and the second air duct structure 4 enclose the aforementioned accommodation cavity. Among them, the shielding member 22 may be a plate structure.

[0061] In some embodiments, referring to Figure 1 , the heat dissipation member 1 may include a heat dissipation surface opposite to the reflecting surface 621. The heat dissipation surface includes a first surface and a second surface located at both ends of the light source 61. The first air duct structure 2 covers the first surface, and the second air duct structure 4 covers the second surface.

[0062] Since the heat dissipation member 1 is usually made of a metal material such as steel, aluminum, or copper, the heat dissipation member 1 is prone to light reflection, which easily causes the phenomenon that stray light other than the curing light emitted by the light source 61 is projected onto the reflecting member 62, thereby affecting the normal operation of the 3D printer and further affecting the printing quality of the model. In the above embodiments, the first surface of the heat dissipation member 1 opposite to the reflecting surface 621 is covered by the first air duct structure 2, and the second surface opposite to the reflecting surface 621 is covered by the second air duct structure 4, thereby avoiding the generation of stray light from the heat dissipation member 1 to the reflecting member 62, and further ensuring the normal operation of the 3D printer and the printing quality of the model.

[0063] It can be understood that both the first air duct structure 2 and the second air duct structure 4 can be made of non-reflective materials such as plastics.

[0064] In some embodiments, referring to Figure 1 and Figure 2 , the 3D printer may further include a mounting plate 7, and the first air duct structure 2, the second air duct structure 4, the heat dissipation member 1, and the light source 61 assembly 6 are all disposed on the mounting plate 7.

[0065] In some embodiments, referring to Figure 1, the 3D printer may further include at least one first mounting post 8 and at least one second mounting post 9. One end of the first mounting post 8 is connected to the mounting plate 7, and the other end of the first mounting post 8 penetrates through the bottom and top ends of the first air duct structure 2. One end of the second mounting post 9 is connected to the mounting plate 7, and the other end of the second mounting post 9 penetrates through the bottom and top ends of the second air duct structure 4.

[0066] Wherein, by arranging the corresponding mounting posts to penetrate through the corresponding air ducts, the functions of supporting and fixing the air ducts can be achieved, ensuring that the first air duct structure 2 and the second air duct structure 4 are stably mounted on the mounting plate 7.

[0067] Embodiment 1: A 3D printer, comprising:

[0068] A base and a printing component, the printing component is arranged on the base, and a light source component 6, a heat sink 1, a first air duct structure 2, a first fan 3, a second air duct structure 4 and a second fan 5 are arranged inside the base;

[0069] The light source component 6 is connected to the heat sink 1;

[0070] The first air duct structure 2 includes a first air duct structure opening and a second air duct structure opening. The first air duct structure opening is connected to the first fan 3, and the second air duct structure opening is connected to the first end of the heat sink 1;

[0071] The second air duct structure 4 includes a third air duct structure opening and a fourth air duct structure opening. The third air duct structure opening is connected to the second end of the heat sink 1, and the fourth air duct structure opening is connected to the second fan 5.

[0072] Embodiment 2: The 3D printer according to Embodiment 1,

[0073] The first end of the heat sink 1 extends into the first air duct structure 2 through the second air duct structure opening;

[0074] The second end of the heat sink 1 extends into the second air duct structure 4 through the third air duct structure opening.

[0075] Embodiment 3: The 3D printer according to Embodiment 2,

[0076] The heat sink 1 includes a substrate and a plurality of heat dissipation fins 11 arranged on the substrate, and the heat dissipation fins 11 extend in the direction from the first end to the second end.

[0077] Embodiment 4: The 3D printer according to Embodiment 1,

[0078] The direction from the first end to the second end is the first direction;

[0079] The first air duct structure 2 and the second air duct structure 4 both extend along the first direction; alternatively, at least one of the first air duct structure 2 and the second air duct structure 4 extends along a second direction different from the first direction.

[0080] Example 5. A 3D printer according to Example 1,

[0081] The first fan and the second fan are arranged on opposite sides of the base; alternatively, the first fan and the second fan are arranged on adjacent sides of the base.

[0082] Example 6. A 3D printer according to Example 1,

[0083] The first air duct structure is a pipe structure; and / or, the second air duct structure is a pipe structure.

[0084] Example 7. A 3D printer according to Example 1,

[0085] The first air duct structure, the heat dissipation component, and the second air duct structure divide the internal space of the base into a first base space and a second base space;

[0086] The first air duct structure is a semi-open structure, and the first air duct structure communicates with the first base space and / or the second base space; and / or,

[0087] The second air duct structure is a semi-open structure, and the second air duct structure communicates with the first base space and / or the second base space.

[0088] Example 8. A 3D printer according to Example 1,

[0089] The first fan is an air intake fan, and the second fan is an air outlet fan; or,

[0090] The first fan is an air outlet fan, and the second fan is an air intake fan.

[0091] Example 9. A 3D printer according to Example 1,

[0092] The light source assembly 6 includes a light source 61 and a reflector 62. The light source 61 is connected to the heat dissipation component 1. The reflector 62 includes a reflecting surface 621, and the reflecting surface 621 is arranged opposite to the light source 61;

[0093] The first air duct structure 2, the heat dissipation component 1, and the second air duct structure 4 enclose a receiving cavity, and the reflecting surface 621 and the light source 61 are located in the receiving cavity.

[0094] Example 10. A 3D printer according to Example 9,

[0095] The first air duct structure 2 includes an air duct body 21 and a shielding member 22. The air duct body 21 includes a first air duct structure opening and a second air duct structure opening; one end of the shielding member 22 abuts against the air duct body 21, and the other end of the shielding member 22 extends to the side of the reflecting member 62;

[0096] The air duct body 21, the shielding member 22, the heat dissipation member 1, and the second air duct structure 4 enclose an accommodation cavity.

[0097] Embodiment 11. A 3D printer according to Embodiment 9,

[0098] The heat dissipation member 1 includes a heat dissipation surface opposite to the reflecting surface 621. The heat dissipation surface includes a first surface and a second surface located on both sides of the light source 61;

[0099] The first air duct structure 2 covers the first surface, and the second air duct structure 4 covers the second surface.

[0100] Embodiment 12. A 3D printer according to Embodiment 9, further comprising:

[0101] A mounting plate 7, and the first air duct structure 2, the second air duct structure 4, the heat dissipation member 1, and the light source assembly 6 are all disposed on the mounting plate 7.

[0102] Embodiment 13. A 3D printer according to Embodiment 12, further comprising:

[0103] At least one first mounting post 8 and at least one second mounting post 9. One end of the first mounting post 8 is connected to the mounting plate 7, and the other end of the first mounting post 8 penetrates through the bottom end and the top end of the first air duct structure 2. One end of the second mounting post 9 is connected to the mounting plate 7, and the other end of the second mounting post 9 penetrates through the bottom end and the top end of the second air duct structure 4.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A three-dimensional printer, characterized in that: include: A base and a printing assembly, wherein the printing assembly is arranged on the base, and a light source assembly, a heat sink, a first air duct structure, a first fan, a second air duct structure and a second fan are arranged inside the base; The light source assembly is connected to the heat sink; The first air duct structure comprises a first air duct structure opening and a second air duct structure opening, the first air duct structure opening is connected to the first fan, and the second air duct structure opening is connected to the first end of the heat sink; The second air duct structure includes a third air duct structure opening and a fourth air duct structure opening, the third air duct structure opening is connected to the second end of the heat sink, and the fourth air duct structure opening is connected to the second fan.

2. The three-dimensional printer according to claim 1, characterized in that: The first end of the heat sink extends into the first air duct structure through the second air duct structure opening; The second end of the heat dissipation element extends into the second air duct structure through the third air duct structure opening.

3. The three-dimensional printer according to claim 2, characterized in that: The heat sink includes a substrate and a plurality of heat dissipation fins disposed on the substrate, wherein the heat dissipation fins extend from the first end to the second end.

4. The three-dimensional printer according to claim 1, characterized in that: The direction from the first end to the second end is a first direction; The first air duct structure and the second air duct structure are both extended along the first direction; or at least one of the first air duct structure and the second air duct structure is extended along a second direction, and the second direction is different from the first direction.

5. The three-dimensional printer according to claim 1, characterized in that: The first fan and the second fan are arranged on two opposite sides of the base; or, the first fan and the second fan are arranged on two adjacent sides of the base.

6. The three-dimensional printer according to claim 1, characterized in that: The first air duct structure is a pipe structure; and / or the second air duct structure is a pipe structure.

7. The three-dimensional printer according to claim 1, characterized in that: The first air duct structure, the heat sink and the second air duct structure divide the inner space of the base into a first base space and a second base space; The first air duct structure is a semi-open structure, and the first air duct structure is connected to the first base space and / or the second base space; and / or, The second air duct structure is a semi-open structure, and the second air duct structure is connected to the first base space and / or the second base space.

8. The three-dimensional printer according to claim 1, characterized in that: The first fan is an air inlet fan, and the second fan is an air outlet fan; or, The first fan is an air outlet fan, and the second fan is an air inlet fan.

9. The three-dimensional printer according to claim 1, characterized in that: The light source assembly comprises a light source and a reflector, wherein the light source is connected to the heat sink, and the reflector comprises a reflective surface, and the reflective surface is arranged opposite to the light source; The first air duct structure, the heat sink and the second air duct structure form an accommodating cavity, and the reflecting surface and the light source are located in the accommodating cavity.

10. The three-dimensional printer according to claim 9, characterized in that: The first air duct structure includes an air duct body and a shielding member, the air duct body includes the first air duct structure opening and the second air duct structure opening; one end of the shielding member abuts against the air duct body, and the other end of the shielding member extends to the side of the reflector; The air duct body, the shielding member, the heat dissipation member and the second air duct structure form the accommodating cavity.

11. The three-dimensional printer according to claim 9, characterized in that: The heat sink comprises a heat dissipation surface opposite to the reflective surface, and the heat dissipation surface comprises a first surface and a second surface located on both sides of the light source; The first air duct structure covers the first surface, and the second air duct structure covers the second surface.

12. The three-dimensional printer according to claim 9, characterized in that: Also includes: A mounting plate, on which the first air duct structure, the second air duct structure, the heat sink and the light source assembly are all arranged.

13. The three-dimensional printer according to claim 12, characterized in that: Also includes: At least one first mounting column and at least one second mounting column, one end of the first mounting column is connected to the mounting plate, and the other end of the first mounting column passes through the bottom and top of the first air duct structure, one end of the second mounting column is connected to the mounting plate, and the other end of the second mounting column passes through the bottom and top of the second air duct structure.

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