Light source assembly of three-dimensional printer and three-dimensional printer

Abstract

The utility model discloses a light source assembly of a three-dimensional printer and the three-dimensional printer, relates to the technical field of three-dimensional printing equipment, and mainly aims to improve the heat dissipation efficiency of a light source and ensure the normal work of the three-dimensional printer. According to the main technical scheme, the light source assembly of the three-dimensional printer is applied to the three-dimensional printer and comprises a light source. The heat dissipation piece is connected with the light source and used for dissipating heat of the light source; the air outlet piece comprises a first air outlet, the first air outlet and the heat dissipation piece are oppositely arranged, and at least the preset percentage of the projection, in the direction facing the heat dissipation piece, of the first air outlet is located on the heat dissipation piece.

Description

Technical Field

[0001] The utility model relates to the technical field of three-dimensional printing equipment, in particular to a light source component of a three-dimensional printer and a three-dimensional printer. Background Art

[0002] A photocurable 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] The light source usually generates heat when working. In order to ensure the normal operation of the printer, a heat sink is usually required to dissipate the heat from the light source. However, the heat dissipation efficiency of the light source in the prior art is low, which causes the temperature of the printer to be too high, which is not conducive to the normal operation of the printer. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a light source assembly of a 3D printer and a 3D printer, the main purpose of which is to improve the heat dissipation efficiency of the light source and ensure the normal operation of the 3D printer.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] In a first aspect, an embodiment of the utility model provides a light source assembly of a 3D printer, which is applied to the 3D printer, and includes:

[0007] light source;

[0008] A heat sink, the heat sink is connected to the light source and is used to dissipate heat for the light source;

[0009] An air outlet member, wherein the air outlet member comprises a first air outlet, the first air outlet is arranged opposite to the heat sink, and at least a preset percentage of a projection of the first air outlet in a direction toward the heat sink is located on the heat sink.

[0010] Optionally, the heat sink comprises a substrate and a plurality of heat sink fins disposed on the substrate, the plurality of heat sink fins are spaced apart from each other and extend from the substrate in a direction away from the substrate, and an air guide gap is formed between two adjacent heat sink fins;

[0011] The first air outlet is arranged opposite to the air guide gap so that the airflow generated by the air outlet member passes through the air guide gap;

[0012] The substrate is connected to the light source.

[0013] Optionally, the substrate comprises a first surface and a second surface which are opposite to each other;

[0014] The plurality of heat dissipation fins at least include a plurality of first heat dissipation fins, a plurality of second heat dissipation fins and a plurality of third heat dissipation fins;

[0015] A plurality of the first heat dissipation fins are arranged on the first surface at intervals; a plurality of the second heat dissipation fins and a plurality of the third heat dissipation fins are arranged on the second surface at intervals;

[0016] The light source is connected to the second surface and is located between the second heat dissipation fins and the third heat dissipation fins.

[0017] Optionally, the second heat dissipation fins and the third heat dissipation fins correspond to at least a portion of the locations where the first heat dissipation fins are disposed.

[0018] Optionally, the air outlet member is arranged on the side where the first surface of the substrate is located;

[0019] The number of the air outlet members is one or more.

[0020] Optionally, the substrate comprises a first end and a second end opposite to each other;

[0021] The plurality of first heat dissipation fins, the plurality of second heat dissipation fins and the plurality of third heat dissipation fins all extend in a direction from the first end to the second end;

[0022] The light source assembly further comprises at least one first air suction member;

[0023] If the number of the first air suction member is one, the air suction port of one of the first air suction members is arranged opposite to the first end or the second end;

[0024] If the number of the first air suction members is two or more, the air suction port of at least one of the first air suction members is arranged opposite to the first end; and the air suction port of at least another of the first air suction members is arranged opposite to the second end.

[0025] Optionally, the substrate includes a third surface and a fourth surface that are opposite to each other;

[0026] A plurality of heat dissipation fins are arranged on the third surface;

[0027] The light source is connected to the fourth surface.

[0028] Optionally, the substrate comprises a third end and a fourth end opposite to each other;

[0029] The plurality of heat dissipation fins extend respectively in a direction from the third end to the fourth end;

[0030] The air outlet member is arranged on the side where the third end of the substrate is located, and the first air outlet of the air outlet member is arranged opposite to the air guide gap.

[0031] Optionally, the light source assembly further includes:

[0032] An air guide member is arranged on the side where the fourth end of the substrate is located, and is used to guide the airflow passing through the air guide gap to a position away from the light source, and / or away from the light source assembly, and / or away from the 3D printer.

[0033] Optionally, the air guide member includes a second air inlet and a second air outlet, the second air inlet is arranged opposite to the air guide gap, and the second air outlet is arranged in a direction away from the light source, and / or away from the light source assembly, and / or away from the 3D printer.

[0034] Optionally, the wind guide member includes a wind shield plate, the wind shield plate is arranged opposite to the wind guide gap, and an angle is formed between the setting direction of the wind shield plate and the setting direction of the substrate, and the angle is any angle greater than 0 degrees and less than 180 degrees, or the angle is any angle between 60 degrees and 120 degrees;

[0035] An air outlet grille is provided on the base of the 3D printer, and when the light source assembly is arranged in the base, the air outlet grille is located on the side of the substrate facing away from the light source; or, the projection of the substrate in the direction toward the air outlet grille is entirely located on the air outlet grille; or, the projection of the air outlet grille in the direction toward the air outlet grille is entirely located on the substrate; or, the area of ​​the overlapping part of the projection of the air outlet grille in the direction toward the substrate and the substrate is larger than a preset area; or, the area of ​​the overlapping part of the projection of the substrate in the direction toward the air outlet grille and the substrate is larger than a preset area.

[0036] Optionally, the air outlet member abuts against the substrate and / or the heat dissipation fins, and the first air outlet is communicated with the air guide gaps between the plurality of heat dissipation fins; and / or,

[0037] The air guide member is in contact with the substrate and / or the heat dissipation fins, and the second air inlet is communicated with the air guide gaps between the plurality of heat dissipation fins.

[0038] Optionally, the air guide member includes an air guide channel connecting the second air inlet and the second air outlet, the air guide channel includes a first section channel and a second section channel, the setting direction of the first section channel is set in a direction that fits the connection direction of the air guide gap, the first section channel and the second section channel are set at a preset angle, and the preset angle is any angle between 60 degrees and 120 degrees; and / or,

[0039] The air outlet member further includes a first air inlet, and the opening direction of the first air inlet is consistent with the opening direction of the second air outlet.

[0040] Optionally, the air guiding member includes an air guiding channel connecting the second air inlet and the second air outlet, and an extension direction of the air guiding channel is consistent with an extension direction of the air guiding gap.

[0041] Optionally, the preset percentage is any percentage between 5% and 100%; or, the preset percentage is any percentage greater than 50%; or, the preset percentage is any percentage greater than 75%; or, the preset percentage is any percentage greater than 90%.

[0042] In a second aspect, the embodiment of the utility model further provides a three-dimensional printer, comprising:

[0043] Base;

[0044] Printing platform;

[0045] A moving component, arranged on the base, the moving component is connected to the printing platform to drive the printing platform to move; and the light source component of the aforementioned 3D printer, the light source component is arranged in the base to project curing light toward the printing platform.

[0046] Optionally, the light source assembly further comprises a reflector, the reflector is arranged opposite to the light source of the light source assembly and is inclined, and the reflector is used to reflect the light projected by the light source;

[0047] The base is provided with a third air inlet and at least one third air outlet connected to the interior thereof;

[0048] The first air inlet of the air outlet of the light source assembly is connected to the third air inlet;

[0049] If the number of the first air suction member of the light source assembly is one, the number of the first air outlet is one, and the air suction port of the first air suction member is connected to the third air inlet;

[0050] If the number of the first air suction members of the light source assembly is two or more, the number of the third air outlets is two or more; the air suction port of at least one of the first air suction members is connected to at least one of the third air outlets; and the air suction port of at least another of the first air suction members is connected to at least another of the third air outlets.

[0051] Optionally, the light source assembly further comprises a light shield, the light shield is arranged opposite to the light source of the light source assembly, and the light emitted by the light source is emitted through the light shield;

[0052] The bottom of the base is provided with a fourth air inlet and a fourth air outlet connected to the interior thereof;

[0053] The first air inlet of the air outlet of the light source assembly is connected to the fourth air inlet;

[0054] The second air outlet of the air guide of the light source assembly is communicated with the fourth air outlet.

[0055] Optionally, the base is provided with at least one fifth air inlet and a fifth air outlet connected to the interior thereof;

[0056] The 3D printer further includes a second air suction member, which is disposed in the base, wherein an air suction port of the second air suction member is connected to the fifth air inlet, and an air outlet of the second air suction member is connected to the fifth air outlet.

[0057] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0058] In the technical solution provided by the embodiment of the utility model, the first air outlet of the air outlet member is arranged opposite to the heat sink, and at least a preset percentage of the projection of the first air outlet in the direction toward the heat sink is located on the heat sink, so that the airflow generated from the first air outlet can be blown toward the heat sink, thereby better taking away the heat of the heat sink, thereby improving the heat dissipation efficiency of the light source, avoiding the overheating of the 3D printer, and ensuring the normal operation of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 An exploded schematic diagram of a light source assembly of a three-dimensional printer provided by an embodiment of the utility model;

[0060] Figure 2 An exploded schematic diagram of another light source assembly of a three-dimensional printer provided by an embodiment of the utility model;

[0061] Figure 3 An exploded schematic diagram of a base in a three-dimensional printer provided by an embodiment of the utility model;

[0062] Figure 4 An exploded schematic diagram of a base in another 3D printer provided by an embodiment of the utility model;

[0063] Figure 5 An exploded schematic diagram of a base in another 3D printer provided by an embodiment of the utility model;

[0064] Figure 6 A schematic structural diagram of a base in a three-dimensional printer provided in an embodiment of the utility model.

[0065] Description of reference numerals:

[0066] 1-light source; 2-heat sink; 21-substrate; 22-heat sink fins; 221-first heat sink fins; 222-second heat sink fins; 223-third heat sink fins; 3-air outlet; 31-first air outlet; 4-first air suction; 5-air guide; 100-base; 101-third air inlet; 102-third air outlet; 103-fourth air inlet; 104-fourth air outlet; 105-fifth air inlet; 106-fifth air outlet; 6-reflector; 7-light shield; 8-second air suction. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings in the preferred embodiments of the present invention.

[0068] like Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a light source assembly of a 3D printer, which can be installed in a base 100 of the 3D printer. The light source assembly can include a light source 1; a heat sink 2, which is connected to the light source 1 and is used to dissipate heat for the light source 1; and an air outlet 3, which includes a first air outlet 31, which is arranged opposite to the heat sink 2, and at least a preset percentage of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2. It can be understood that when there are multiple air outlets 3, the first air outlet 31 is the air outlet of all the air outlets 3.

[0069] Among them, the light source 1 is a light source 1 that can emit curing light. The type of curing light is not limited, such as purple light, ultraviolet light, etc. Specifically, the light source 1 can be a surface light source 1, such as a cob light source 1 (Chip On Board Light light source 1, high-power integrated surface light source 1), or a point light source 1, etc. The heat sink 2 is a device that can transfer the heat generated by the light source 1, such as a radiator, etc., to achieve heat dissipation for the light source 1. The air outlet 3 can be a device that can generate airflow, such as a fan, a blower, etc.

[0070] In the light source assembly of the 3D printer provided by the embodiment of the utility model, the first air outlet 31 of the air outlet member 3 is arranged opposite to the heat sink 2, and at least a preset percentage of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2, so that the airflow generated from the first air outlet 31 can be blown toward the heat sink 2, thereby better taking away the heat of the heat sink 2, thereby improving the heat dissipation efficiency of the light source 1, avoiding the overheating of the 3D printer, and ensuring the normal operation of the 3D printer.

[0071] The aforementioned preset percentage can be any percentage between 5% and 100%. If a small part of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2, on the one hand, the air outlet 3 can assist the heat sink 2 in the heat dissipation function of the light source 1, and on the other hand, it is also beneficial to the installation of the light source assembly in the 3D printer when the area of ​​the first air outlet 31 of the air outlet 3 is large and the height of the heat sink 2 is small. If a large part of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2, the airflow from the first air outlet 31 to the heat sink 2 can be increased, thereby taking away more heat from the heat sink 2, and thus better improving the heat dissipation efficiency of the light source 1.

[0072] Of course, if the preset percentage is 100%, the projection of the first air outlet 31 in the direction toward the heat sink 2 is entirely located on the heat sink 2, so that the airflow generated from the first air outlet 31 can be almost entirely blown toward the heat sink 2, thereby better dissipating the heat of the heat sink 2, and further improving the heat dissipation efficiency of the light source 1.

[0073] Alternatively, the aforementioned preset percentage may be any percentage greater than 50%. If more than half of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2, on the one hand, the airflow blown out from the first air outlet 31 can be blown more toward the heat sink 2, thereby taking away more heat from the heat sink 2, thereby better improving the heat dissipation efficiency of the light source 1. On the other hand, it is also beneficial to install the light source assembly in the 3D printer when the area of ​​the first air outlet 31 of the air outlet 3 is large and the height of the heat sink 2 is small.

[0074] Alternatively, the aforementioned preset percentage may be any percentage greater than 75%; or, the preset percentage may be any percentage greater than 90%. If a larger portion of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2, on the one hand, the airflow blown out from the first air outlet 31 can be blown more toward the heat sink 2, thereby taking away more heat from the heat sink 2, thereby better improving the heat dissipation efficiency of the light source 1. On the other hand, it is also beneficial to the installation of the light source assembly in the 3D printer when the area of ​​the first air outlet 31 of the air outlet 3 is large and the height of the heat sink 2 is small.

[0075] In some embodiments, see Figure 1 and Figure 2 The heat sink 2 may include a substrate 21 and a plurality of heat sink fins 22 disposed on the substrate 21. The plurality of heat sink fins 22 are spaced apart from each other and extend from the substrate 21 in a direction away from the substrate 21. An air guide gap is formed between two adjacent heat sink fins 22. The first air outlet 31 is disposed opposite to the air guide gap so that the airflow generated by the air outlet member 3 passes through the air guide gap. The substrate 21 is connected to the light source 1.

[0076] Among them, multiple cooling fins 22 can increase the heat dissipation area of ​​the heat sink 2, and the first air outlet 31 is opposite to the wind guide gap, so that the airflow generated by the air outlet 3 can pass through the wind guide gap, so that heat dissipation of each cooling fin 22 can be achieved, which is more conducive to the heat dissipation of the heat sink 2, and further improves the heat dissipation efficiency of the light source 1.

[0077] In some embodiments, see Figure 1 The substrate 21 may include a first surface and a second surface opposite to each other; the plurality of heat dissipation fins 22 include at least a plurality of first heat dissipation fins 221, a plurality of second heat dissipation fins 222 and a plurality of third heat dissipation fins 223; the plurality of first heat dissipation fins 221 are arranged on the first surface at intervals from each other; the plurality of second heat dissipation fins 222 and the plurality of third heat dissipation fins 223 are respectively arranged on the second surface at intervals from each other; the light source 1 is connected to the second surface and is located between the plurality of second heat dissipation fins 222 and the plurality of third heat dissipation fins 223.

[0078] In the above embodiment, heat dissipation fins 22 are arranged on both sides of the substrate 21, which further increases the heat dissipation area of ​​the heat sink 2 and improves the heat dissipation efficiency. Moreover, the first heat dissipation fins 221, the second heat dissipation fins 222 and the third heat dissipation fins 223 are correspondingly located on the rear side and the left and right sides of the light source 1, so that the first heat dissipation fins 221, the second heat dissipation fins 222 and the third heat dissipation fins 223 dissipate heat on three sides of the light source 1 at the same time, effectively improving the heat dissipation efficiency of the heat sink 2 to the light source 1 and improving the heat dissipation effect of the light source 1.

[0079] In some embodiments, the second heat dissipation fins 222 and the third heat dissipation fins 223 correspond to at least a portion of the first heat dissipation fins 221. Figure 1 , the second heat sink fin 222 and the third heat sink fin 223 can be respectively arranged in parallel with the first heat sink fin 221. Such a structural arrangement can make the air guide gaps of all heat sink fins 22 extend in the same direction, so that the airflow with the same flow direction as the air guide gap extending direction flowing through the air guide gap can better take away the heat of the heat sink 2, thereby ensuring the heat dissipation efficiency of the light source 1. In other words, such a structural arrangement facilitates the heat dissipation of the heat sink 2, thereby being more conducive to improving the heat dissipation efficiency of the light source 1.

[0080] In some embodiments, see Figure 1 The air outlet member 3 may be disposed on the side where the first surface of the substrate 21 is located; the number of the air outlet members 3 is one or more. Specifically, the number of the air outlet members 3 may be one, two or more.

[0081] In some embodiments, see Figure 1, the substrate 21 may include a first end and a second end; a plurality of first heat dissipation fins 221, a plurality of second heat dissipation fins 222 and a plurality of third heat dissipation fins 223 all extend in a direction from the first end to the second end;

[0082] The light source assembly also includes at least one first air suction member 4; if the number of the first air suction member 4 is one, the air suction port of one first air suction member 4 is arranged opposite to the first end or the second end; if the number of the first air suction members 4 is two or more, the air suction port of at least one first air suction member 4 is arranged opposite to the first end; and the air suction port of at least another first air suction member 4 is arranged opposite to the second end.

[0083] Specifically, in the implementation, when only one first air suction member 4 is provided, the air outlet member 3 blows air toward the first plurality of heat sink fins 221 on the side where the first surface of the substrate 21 is located. After the airflow reaches the first plurality of heat sink fins 221, it will flow toward the first end or the second end through the air guide gaps of the first plurality of heat sink fins 221 under the action of the first air suction member 4 provided at the first end or the second end of the substrate 21; at the same time, the first air suction member 4 draws the airflow flowing to the first end or the second end of the substrate 21, and at the same time, it can also draw the airflow passing through the air guide gaps of the second plurality of heat sink fins 222 and the third plurality of heat sink fins 223, thereby taking away the heat emitted by the entire heat sink 2, and finally realizing efficient heat dissipation of the entire heat sink 2. As a result, the heat sink 2 efficiently dissipates heat on three sides of the light source 1 at the same time, further improving the heat dissipation efficiency and heat dissipation effect of the light source 1.

[0084] In the case of setting two or more first air suction members 4, the air outlet member 3 blows air to the first heat sink fins 221 on the side where the first surface of the substrate 21 is located. After the airflow reaches the first heat sink fins 221, it will be divided into two paths through the air guide gaps of the first heat sink fins 221 under the suction action of the first air suction member 4 set at the first end and the second end of the substrate 21, and flow to the first end and the second end of the substrate 21 respectively; at the same time, at least one first air suction member 4 at the first end of the substrate 21 not only sucks the airflow flowing to the first end, but also sucks the airflow passing through the air guide gaps of the second heat sink fins 222, and at least another first air suction member 4 at the second end of the substrate 21 not only sucks the airflow flowing to the second end, but also sucks the airflow passing through the air guide gaps of the third heat sink fins 223, thereby taking away the heat emitted by the entire heat sink 2, and finally achieving efficient heat dissipation of the entire heat sink 2. As a result, the heat sink 2 simultaneously performs efficient heat dissipation on three sides of the light source 1, further improving the heat dissipation efficiency and heat dissipation effect of the light source 1.

[0085] Understandably, see Figure 1 , Figure 3 and Figure 4The above embodiment is suitable for the case where the installation space of the light source assembly is relatively large. For example, the light source assembly is installed in the base 100 of the 3D printer, and the light source assembly further includes a reflector 6 which is arranged opposite to and obliquely to the light source 1. The curing light emitted by the light source 1 is projected onto the reflector 6 and then emitted after being reflected by the reflector 6. In this case, due to the arrangement of the reflector 6, the heat sink 2 of the light source assembly has a relatively large installation space in the base 100, and therefore, the heat sink 2 can adopt the above structure.

[0086] In some embodiments, see Figure 2 The substrate 21 may include a third surface and a fourth surface that are opposite to each other; a plurality of heat dissipation fins 22 are arranged on the third surface; and the light source 1 is connected to the fourth surface so that the heat dissipation element 2 dissipates heat for the light source 1 .

[0087] In some embodiments, see Figure 2 The substrate 21 may include a third end and a fourth end; a plurality of heat dissipation fins 22 extend respectively in a direction from the third end to the fourth end; the air outlet member 3 is arranged on the side where the third end of the substrate 21 is located, and the first air outlet 31 of the air outlet member 3 is arranged opposite to the air guide gap.

[0088] Among them, the air outlet member 3 blows air to the side heat sink 2 where the third end of the substrate 21 is located, so that the airflow can be blown from the third end to the fourth end, so that the airflow can flow continuously from one end of the multiple air guide gaps to the other end, thereby taking away more heat from the heat sink 2, realizing efficient heat dissipation of the heat sink 2, and further improving the heat dissipation efficiency and heat dissipation effect of the light source 1.

[0089] In some embodiments, see Figure 2 The light source assembly may further include an air guide member 5, which is disposed on the side where the fourth end of the substrate 21 is located, and is used to guide the airflow passing through the air guide gap to a position away from the light source 1, and / or away from the light source assembly, and / or away from the 3D printer.

[0090] According to the above embodiment, the air guide 5 can guide the hot air flow passing through the air guide gap to a position far away from the light source 1 and / or the light source assembly, and / or the 3D printer. On the one hand, the purpose of directly discharging the hot air flow can be achieved. For example, when the light source assembly is installed in the base 100 of the 3D printer, the hot air flow can be directly discharged from the base 100 through the air outlet of the base 100 under the guidance of the air guide 5, that is, the problem of the temperature of some areas in the base 100 not dropping due to the heat accumulation caused by the hot air flow flowing back and forth in the base 100 can be reduced, and the problem of the temperature of some areas in the base 100 being high due to the vortex effect brought by the flow of the hot air flow can be reduced. At the same time, it can also reduce the heat influence of other components on the heat sink 2 inside the machine, so as to facilitate the heat exchange between the light source 1 and the heat sink 2, and then better improve the heat dissipation efficiency of the heat sink 2.

[0091] In other words, the hot air flow is guided by the air guide 5 to a position away from the light source 1 and / or away from the light source assembly, and / or away from the 3D printer, for example, to a position away from the light source 1, so as to limit the heat of the light source 1 to a local area below the light source 1, thereby preventing the heat from escaping into the installation space of the entire light source assembly, such as the base 100 of the 3D printer, thereby better avoiding a high temperature inside the base 100, thereby ensuring the normal operation of the 3D printer.

[0092] The air guide member 5 may have various structural forms, as long as it can guide the airflow passing through the air guide gap to a position away from the light source 1 and / or away from the light source assembly, and / or away from the 3D printer.

[0093] In some embodiments, the air guide 5 may include a second air inlet and a second air outlet, the second air inlet is arranged opposite to the air guide gap, and the second air outlet is arranged in a direction away from the light source 1, and / or away from the light source assembly, and / or away from the three-dimensional printer, so that the hot air flow is blown away from the light source 1, and / or away from the light source assembly, and / or away from the three-dimensional printer through the air guide.

[0094] In other embodiments, the wind guide member 5 may include a wind shield, which is arranged opposite to the wind guide gap, and an angle is formed between the setting direction of the wind shield and the setting direction of the substrate 21, that is, an angle is formed between the extension direction of the wind shield and the extension direction of the substrate 21, and the angle may be greater than 0 degrees and less than 180 degrees, so that the wind shield can block the airflow, so that the airflow changes its flow direction;

[0095] An air outlet grille may be provided on the base 100 of the 3D printer. When the light source assembly is arranged in the base 100, the air outlet grille is located on the side of the substrate 21 away from the light source; wherein, the projection of the substrate 21 in the direction toward the air outlet grille is entirely located on the air outlet grille; or, the projection of the air outlet grille in the direction toward the air outlet grille is entirely located on the substrate 21; or, the area of ​​the overlapping part of the projection of the air outlet grille in the direction toward the substrate 21 with the substrate 21 is larger than a preset area, and the preset area may be an area size that can ensure that the hot air flow can be quickly discharged from the base 100; such a structural arrangement can facilitate the airflow whose flow direction is changed by the wind shield to be completely and quickly discharged from the base 100 through the air outlet grille, thereby better avoiding a high temperature inside the base 100, and further ensuring the normal operation of the 3D printer.

[0096] In the above embodiment, the angle between the wind shield and the substrate 21 can be any angle between 60 degrees and 120 degrees, thereby ensuring that the hot air flow through the air guide 5 can be limited to the local area below the light source 1, thereby better avoiding heat dissipation into the installation space of the entire light source assembly, such as the base 100 of the 3D printer, thereby better avoiding high temperatures inside the base 100, and thus ensuring the normal operation of the 3D printer.

[0097] In some embodiments, the air outlet member 3 abuts against the substrate 21 and / or the heat sink fins 22, and the first air outlet 31 is connected to the air guide gap between the multiple heat sink fins 22; and / or the air guide member 5 abuts against the substrate 21 and / or the heat sink fins 22, and the second air inlet is connected to the air guide gap between the multiple heat sink fins 22, so as to avoid the heat flow from escaping through the gap between the air outlet member and the heat sink, and between the heat sink and the air guide member as much as possible, thereby limiting the heat of the light source 1 to the local area below the light source 1, and avoiding the heat from escaping to the installation space of the entire light source assembly, such as the base 100 of the 3D printer, so as to better avoid the high temperature inside the base 100, thereby ensuring the normal operation of the 3D printer.

[0098] In some embodiments, the air guide member 5 may include an air guide channel connecting the second air inlet and the second air outlet, the air guide channel includes a first section of the channel and a second section of the channel, the setting direction of the first section of the channel is set to fit the connection direction of the air guide gap, the first section of the channel and the second section of the channel are set at a preset angle, and the preset angle is any angle between 60 degrees and 120 degrees; and / or, the air outlet member 3 also includes a first air inlet, and the opening direction of the first air inlet is consistent with that of the second air outlet.

[0099] Among them, the second air inlet can be connected to the first section of the channel, the first section of the channel and the second section of the channel can be connected, and the second section of the channel can be connected to the second air outlet. Moreover, the setting direction of the first section of the channel fits the connection direction of the air guide gap, which can be understood as: the ventilation direction of the first section of the channel and the ventilation direction of the air guide gap can be consistent or the two have only a small angle. Such a structural setting can make the airflow blown out through the air guide gap of multiple heat dissipation fins 22 directly enter the first section of the channel, then enter the second section of the channel through the first section of the channel, and finally flow out from the second air outlet through the second section of the channel, flowing in the direction away from the light source 1, and / or away from the direction of the light source assembly, and / or away from the direction of the three-dimensional printer.

[0100] Among them, the first section of the channel and the second section of the channel have an included angle of any angle between 60 degrees and 120 degrees, which can ensure that the hot air flow flowing out through the air guide channel can be limited to the local area below the light source 1, thereby better preventing heat from dissipating into the installation space of the entire light source assembly, such as the base 100 of the 3D printer, thereby better avoiding high temperatures inside the base 100, and thus ensuring the normal operation of the 3D printer.

[0101] Specifically, the air guide member 5 can be a box body structure, which may include a roughly L-shaped top plate and side plates connected to both sides of the top plate, the top plate and the side plates together form an air guide channel, the front of the top plate is connected to the fourth end, the front of the top plate forms a second air inlet, and the bottom of the top plate forms a second air outlet. It has a simple structure, low cost, and reliable use.

[0102] Among them, see Figure 2 The air outlet 3 may further include a first air inlet, and the first air inlet and the second air outlet are opened in the same direction, so as to realize air inflow and air outflow from below the light source 1, which is more conducive to the installation of the light source assembly in the base 100 of the 3D printer, and is also more conducive to the circulation of airflow in the base 100 and the heat dissipation of the light source 1.

[0103] In some embodiments, the air outlet member 3 may be a blower. Since the air outlet area of ​​the blower is relatively small, it is convenient to realize that the projection of the first air outlet 31 of the air outlet member 3 in the direction toward the heat sink 2 is entirely located on the heat sink 2, so that the airflow blown out from the blower can all be blown toward the heat sink 2, which is more conducive to efficient heat dissipation of the heat sink 2, and further improves the heat dissipation efficiency and heat dissipation effect of the light source 1. Moreover, the air inlet and air outlet of the blower are located on the adjacent two sides thereof, which is convenient to realize that the first air inlet of the air outlet member 3 and the second air outlet of the air guide member 5 are in the same direction.

[0104] In other embodiments, the air guide member 5 may include an air guide channel connecting the second air inlet and the second air outlet, and the extension direction of the air guide channel is consistent with the extension direction of the air guide gap. In this embodiment, the air guide channel may be a linear channel. When the light source assembly is installed in the base 100 of the 3D printer, an exhaust port corresponding to the second air outlet may be provided on the side or back of the base 100, so that the hot air flow blown out from the air guide gap may be directly discharged from the side or back of the base 100 through the air guide channel.

[0105] Understandably, see Figure 2 and Figure 5 The above embodiment is applicable to the case where the installation space of the light source assembly is small. For example, the light source assembly is installed in the base 100 of the 3D printer, and the light source assembly further includes a light shield 7 arranged opposite to the light source 1, and the curing light emitted by the light source 1 is emitted through the light shield 7. In this case, due to the arrangement of the light shield 7, the installation space of the heat sink 2 in the base 100 is small, so the light source assembly can adopt the above structure.

[0106] like Figures 3 to 5 As shown, an embodiment of the utility model further provides a three-dimensional printer, including a base 100, a printing platform and a moving component, wherein the moving component is arranged on the base 100, and the moving component is connected to the printing platform to drive the printing platform to move; and also includes the light source component of the aforementioned three-dimensional printer, which is arranged in the base 100 to project curing light toward the printing platform.

[0107] The 3D printer provided by the embodiment of the utility model includes the aforementioned light source assembly of the 3D printer. Therefore, all the beneficial effects of the 3D printer including the light source assembly of the 3D printer are not described in detail here.

[0108] In some embodiments, see Figure 2 and Figure 3 The light source assembly may further include a reflector 6 , which is arranged opposite to and tilted from the light source 1 of the light source assembly, and is used to reflect the light projected by the light source 1 .

[0109] Moreover, the base 100 is provided with a third air inlet 101 and at least one third air outlet 102 connected to the interior thereof; the first air inlet of the air outlet member 3 of the light source assembly is connected to the third air inlet 101. If the number of the first air suction member 4 of the light source assembly is one, the number of the first air outlet 31 is one, and the air suction port of the first air suction member 4 is connected to the third air inlet 101; if the number of the first air suction members 4 is two or more, the number of the third air outlet 102 is two or more; the air suction port of at least one first air suction member 4 is connected to at least one third air outlet 102; the air suction port of at least another first air suction member 4 is connected to at least another third air outlet 102.

[0110] The air outlet 3 can draw cold air from the outside of the base 100 through the third air inlet 101, and send the air into the base 100 through the first air outlet 31 to dissipate heat from the heat sink 2. The first air suction member 4 can draw the heat of the heat sink 2 in the base 100 to the outside of the base 100 through the third air outlet 102, thereby dissipating heat from the heat sink 2 and ultimately achieving efficient heat dissipation of the light source 1. Specifically, the third air inlet 101 and the third air outlet 102 can be correspondingly arranged on two adjacent side walls of the base 100.

[0111] In some embodiments, see Figure 5 and Figure 6 The light source assembly further includes a light shield 7 , which is disposed opposite to the light source 1 of the light source assembly, and the light emitted by the light source 1 is emitted through the light shield 7 .

[0112] Moreover, a fourth air inlet 103 and a fourth air outlet 104 connected to the interior of the base 100 are provided at the bottom; the first air inlet of the air outlet member 3 of the light source assembly is connected to the fourth air inlet 103; and the second air outlet of the air guide member 5 of the light source assembly is connected to the fourth air outlet 104.

[0113] Among them, the air outlet member 3 can suck the cold air flow outside the base 100 through the fourth air inlet 103, and send the air flow into the base 100 through the first air outlet 31 to dissipate the heat of the heat sink 2. The hot air flow after passing through the heat sink 2 is discharged from the base 100 from the fourth air outlet 104 through the air guide member 5 under the action of the air outlet member 3, thereby realizing the heat dissipation of the heat sink 2 and finally realizing efficient heat dissipation of the light source 1.

[0114] In some embodiments, see Figure 5 The base 100 is provided with at least one fifth air inlet 105 and a fifth air outlet 106 connected to the interior thereof; the three-dimensional printer may further include a second air suction member 8, the second air suction member 8 is arranged in the base 100, the air suction port of the second air suction member 8 is connected to the fifth air inlet 105, and the air suction port of the second air suction member 8 is connected to the fifth air outlet 106

[0115] In the above embodiment, by providing the second air suction member 8, the second air suction member 8 draws the external cold air flow into the base 100 through the fifth air inlet 105, so that the cold air flow performs heat exchange in the base 100, and then the hot air flow is discharged from the base 100 through the fifth air outlet 106, thereby achieving heat dissipation of the entire space in the base 100, and further facilitating the normal operation of the 3D printer. The fifth air inlet 105 and the fifth air outlet 106 can be correspondingly provided on two opposite side walls of the base 100.

[0116] It should be noted that, among the various embodiments described in the present application, if the features in different embodiments are not mutually exclusive / not contradictory, they may be combined into one embodiment for implementation.

[0117] Embodiment 1: A light source assembly of a three-dimensional printer, comprising:

[0118] Light source 1;

[0119] A heat sink 2, the heat sink 2 is connected to the light source 1 and is used to dissipate heat for the light source 1;

[0120] The air outlet member 3 includes a first air outlet 31 . The first air outlet 31 is arranged opposite to the heat sink 2 . At least a preset percentage of the projection of the first air outlet 31 in the direction toward the heat sink 2 is located on the heat sink 2 .

[0121] Embodiment 2: According to the light source assembly of embodiment 1,

[0122] The heat sink 2 includes a base plate 21 and a plurality of heat sink fins 22 disposed on the base plate 21. The plurality of heat sink fins 22 are spaced apart from each other and extend from the base plate 21 in a direction away from the base plate 21. An air guide gap is formed between two adjacent heat sink fins 22.

[0123] The first air outlet 31 is arranged opposite to the air guide gap, so that the airflow generated by the air outlet member 3 passes through the air guide gap;

[0124] The substrate 21 is connected to the light source 1 .

[0125] Embodiment 3: According to the light source assembly of embodiment 2,

[0126] The substrate 21 includes a first surface and a second surface that are opposite to each other;

[0127] The plurality of heat dissipation fins 22 at least include a plurality of first heat dissipation fins 221 , a plurality of second heat dissipation fins 222 and a plurality of third heat dissipation fins 223 ;

[0128] A plurality of first heat dissipation fins 221 are disposed on the first surface at intervals; a plurality of second heat dissipation fins 222 and a plurality of third heat dissipation fins 223 are disposed on the second surface at intervals;

[0129] The light source 1 is connected to the second surface and is located between the plurality of second heat dissipation fins 222 and the plurality of third heat dissipation fins 223 .

[0130] Embodiment 4: According to the light source assembly of embodiment 3,

[0131] The second heat dissipation fins 222 and the third heat dissipation fins 223 correspond to at least a portion of the first heat dissipation fins 221 .

[0132] Embodiment 5: According to the light source assembly of embodiment 3,

[0133] The air outlet member 3 is disposed on the side where the first surface of the substrate 21 is located;

[0134] The number of the air outlet pieces 3 is one or more.

[0135] Embodiment 6: According to the light source assembly of embodiment 3,

[0136] The substrate 21 includes a first end and a second end opposite to each other;

[0137] The plurality of first heat dissipation fins 221, the plurality of second heat dissipation fins 222 and the plurality of third heat dissipation fins 223 all extend in a direction from the first end to the second end;

[0138] The light source assembly further includes at least one first air suction member 4;

[0139] If the number of the first air suction member 4 is one, the air suction port of the first air suction member 4 is arranged opposite to the first end or the second end;

[0140] If the number of the first air suction members 4 is two or more, the air suction port of at least one first air suction member 4 is arranged opposite to the first end; the air suction port of at least another first air suction member 4 is arranged opposite to the second end.

[0141] Embodiment 7: The light source assembly according to embodiment 2,

[0142] The substrate 21 includes a third surface and a fourth surface which are opposite to each other;

[0143] A plurality of heat dissipation fins 22 are provided on the third surface;

[0144] The light source 1 is connected to the fourth surface.

[0145] Embodiment 8: The light source assembly according to embodiment 7,

[0146] The substrate 21 includes a third end and a fourth end opposite to each other;

[0147] The plurality of heat dissipation fins 22 extend from the third end to the fourth end respectively;

[0148] The air outlet member 3 is disposed on the side where the third end of the base plate 21 is located, and the first air outlet of the air outlet member 3 is disposed opposite to the air guide gap.

[0149] Embodiment 9: The light source assembly according to embodiment 8 further comprises:

[0150] The air guide member 5 is arranged on the side where the fourth end of the substrate 21 is located, and is used to guide the airflow passing through the air guide gap to a position away from the light source 1 and / or away from the light source assembly and / or away from the 3D printer.

[0151] Embodiment 10, according to the light source assembly of embodiment 9, the air guide member includes a second air inlet and a second air outlet, the second air inlet is arranged opposite to the air guide gap, and the second air outlet is arranged in a direction away from the light source 1, and / or away from the light source assembly, and / or away from the 3D printer.

[0152] Embodiment 11: The light source assembly according to embodiment 9,

[0153] The wind guide member 5 includes a wind shield plate, which is arranged opposite to the wind guide gap, and an angle is formed between the setting direction of the wind shield plate and the setting direction of the base plate, and the angle is any angle greater than 0 degrees and less than 180 degrees, or any angle between 60 degrees and 120 degrees;

[0154] An air outlet grille is provided on the base 100 of the 3D printer. When the light source assembly is arranged in the base 100, the air outlet grille is located on the side of the substrate 21 away from the light source 1; wherein the projection of the substrate 21 in the direction toward the air outlet grille is entirely located on the air outlet grille; or, the projection of the air outlet grille in the direction toward the air outlet grille is entirely located on the substrate 21; or, the area of ​​the overlapping part of the projection of the air outlet grille in the direction toward the substrate 21 and the substrate 21 is greater than a preset area.

[0155] Embodiment 12: The light source assembly according to embodiment 10,

[0156] The air outlet member 3 is in contact with the substrate and / or the heat dissipation fins, and the first air outlet is connected with the air guide gap between the plurality of heat dissipation fins 22; and / or,

[0157] The air guide member 5 is in contact with the base plate and / or the heat dissipation fins, and the second air inlet is communicated with the air guide gaps between the plurality of heat dissipation fins 22 .

[0158] Embodiment 13: The light source assembly according to embodiment 10,

[0159] The air guide member 5 includes an air guide channel connected to the second air inlet and the second air outlet, the air guide channel includes a first section channel and a second section channel, the setting direction of the first section channel is arranged in a direction that fits the connection direction of the air guide gap, the first section channel and the second section channel are arranged at a preset angle, and the preset angle is any angle between 60 degrees and 120 degrees; and / or,

[0160] The air outlet 3 further includes a first air inlet, and the opening direction of the first air inlet is consistent with that of the second air outlet.

[0161] Embodiment 14: The light source assembly according to embodiment 10,

[0162] The air guiding member includes an air guiding channel connecting the second air inlet and the second air outlet, and an extending direction of the air guiding channel is consistent with an extending direction of the air guiding gap.

[0163] Embodiment 15: A light source assembly according to any one of embodiments 1 to 14,

[0164] The preset percentage is any percentage between 5% and 100%; or, the preset percentage is any percentage greater than 50%; or, the preset percentage is any percentage greater than 75%; or, the preset percentage is any percentage greater than 90%.

[0165] Embodiment 16: A three-dimensional printer, comprising:

[0166] Base 100;

[0167] Printing platform;

[0168] A moving component, disposed on the base 100, connected to the printing platform to drive the printing platform to move; and

[0169] As in the light source assembly of any one of embodiments 1 to 14 of the 3D printer, the light source assembly is disposed in the base 100 to project curing light toward the printing platform.

[0170] Embodiment 17: A three-dimensional printer according to embodiment 16,

[0171] The light source assembly further includes a reflector 6, which is arranged opposite to and tilted from the light source 1 of the light source assembly, and is used to reflect the light projected by the light source 1;

[0172] The base 100 is provided with a third air inlet 101 and at least one third air outlet 102 which are connected to the interior thereof;

[0173] The first air inlet of the air outlet member 3 of the light source assembly is connected to the third air inlet 101;

[0174] If the number of the first air suction member 4 of the light source assembly is one, the number of the first air outlet 31 is one, and the air suction port of the first air suction member 4 is connected to the third air inlet 101;

[0175] If the number of first air suction parts 4 of the light source assembly is two or more, the number of third air outlets 102 is two or more; the air suction port of at least one first air suction part 4 is connected to at least one third air outlet 102; the air suction port of at least another first air suction part 4 is connected to at least another third air outlet 102.

[0176] Embodiment 18: A three-dimensional printer according to embodiment 16,

[0177] The light source assembly further includes a light shield 7, which is arranged opposite to the light source 1 of the light source assembly, and the light emitted by the light source 1 is emitted through the light shield 7;

[0178] The bottom of the base 100 is provided with a fourth air inlet 103 and a fourth air outlet 104 which are connected to the interior thereof;

[0179] The first air inlet of the air outlet member 3 of the light source assembly is connected to the fourth air inlet 103;

[0180] The second air outlet of the air guide member 5 of the light source assembly is communicated with the fourth air outlet 104 .

[0181] Embodiment 19: A three-dimensional printer according to embodiment 18,

[0182] The base 100 is provided with at least one fifth air inlet 105 and a fifth air outlet 106 which are connected to the interior thereof;

[0183] The 3D printer further includes a second suction member 8 , which is disposed in the base 100 , wherein the suction port of the second suction member 8 is connected to the fifth air inlet 105 , and the air outlet of the second suction member 8 is connected to the fifth air outlet 106 .

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A light source assembly for a 3D printer, characterized in that: include: light source; A heat sink, the heat sink is connected to the light source and is used to dissipate heat for the light source; An air outlet member, wherein the air outlet member comprises a first air outlet, the first air outlet is arranged opposite to the heat sink, and at least a preset percentage of a projection of the first air outlet in a direction toward the heat sink is located on the heat sink.

2. The light source assembly according to claim 1, characterized in that: The heat sink comprises a substrate and a plurality of heat sink fins arranged on the substrate, wherein the plurality of heat sink fins are spaced apart from each other and extend from the substrate in a direction away from the substrate, and an air guide gap is formed between two adjacent heat sink fins; The first air outlet is arranged opposite to the air guide gap so that the airflow generated by the air outlet member passes through the air guide gap; The substrate is connected to the light source.

3. The light source assembly according to claim 2, characterized in that: The substrate comprises a first surface and a second surface which are opposite to each other; The plurality of heat dissipation fins at least include a plurality of first heat dissipation fins, a plurality of second heat dissipation fins and a plurality of third heat dissipation fins; A plurality of the first heat dissipation fins are arranged on the first surface at intervals; a plurality of the second heat dissipation fins and a plurality of the third heat dissipation fins are arranged on the second surface at intervals; The light source is connected to the second surface and is located between the second heat dissipation fins and the third heat dissipation fins.

4. The light source assembly according to claim 3, characterized in that: The second heat dissipation fins and the third heat dissipation fins correspond to at least a portion of the locations where the first heat dissipation fins are disposed.

5. The light source assembly according to claim 3, characterized in that: The air outlet member is arranged on the side where the first surface of the substrate is located; The number of the air outlet members is one or more.

6. The light source assembly according to claim 3, characterized in that: The substrate includes opposing first and second ends; The plurality of first heat dissipation fins, the plurality of second heat dissipation fins and the plurality of third heat dissipation fins all extend in a direction from the first end to the second end; The light source assembly further comprises at least one first air suction member; If the number of the first air suction member is one, the air suction port of one of the first air suction members is arranged opposite to the first end or the second end; If the number of the first air suction members is two or more, the air suction port of at least one of the first air suction members is arranged opposite to the first end; and the air suction port of at least another of the first air suction members is arranged opposite to the second end.

7. The light source assembly according to claim 2, characterized in that: The substrate comprises a third surface and a fourth surface which are opposite to each other; A plurality of heat dissipation fins are arranged on the third surface; The light source is connected to the fourth surface.

8. The light source assembly according to claim 7, characterized in that: The substrate includes opposing third and fourth ends; The plurality of heat dissipation fins extend respectively in a direction from the third end to the fourth end; The air outlet member is arranged on the side where the third end of the substrate is located, and the first air outlet of the air outlet member is arranged opposite to the air guide gap.

9. The light source assembly according to claim 8, characterized in that: Also includes: An air guide member is arranged on the side where the fourth end of the substrate is located, and is used to guide the airflow passing through the air guide gap to a position away from the light source, and / or away from the light source assembly, and / or away from the 3D printer.

10. The light source assembly according to claim 9, characterized in that: The air guide member includes a second air inlet and a second air outlet, the second air inlet is arranged opposite to the air guide gap, and the second air outlet is arranged in a direction away from the light source, and / or away from the light source assembly, and / or away from the 3D printer.

11. The light source assembly according to claim 9, characterized in that: The wind guide member includes a wind shield plate, the wind shield plate is arranged opposite to the wind guide gap, and an angle is formed between the setting direction of the wind shield plate and the setting direction of the base plate, and the angle is any angle greater than 0 degrees and less than 180 degrees, or the angle is any angle between 60 degrees and 120 degrees; An air outlet grille is provided on the base of the 3D printer, and when the light source assembly is arranged in the base, the air outlet grille is located on a side of the substrate facing away from the light source; wherein the projection of the substrate in a direction toward the air outlet grille is entirely located on the air outlet grille; or, the projection of the air outlet grille in a direction toward the air outlet grille is entirely located on the substrate; or, the area of ​​the overlapping part of the projection of the air outlet grille in a direction toward the substrate and the substrate is greater than a preset area.

12. The light source assembly according to claim 10, characterized in that: The air outlet member is in contact with the substrate and / or the heat dissipation fins, and the first air outlet is in communication with the air guide gaps between the plurality of heat dissipation fins; and / or, The air guide member is in contact with the substrate and / or the heat dissipation fins, and the second air inlet is communicated with the air guide gaps between the plurality of heat dissipation fins.

13. The light source assembly according to claim 10, characterized in that: The air guide member includes an air guide channel connecting the second air inlet and the second air outlet, the air guide channel includes a first section channel and a second section channel, the first section channel is arranged in a direction that matches the connection direction of the air guide gap, the first section channel and the second section channel are arranged at a preset angle, and the preset angle is any angle between 60 degrees and 120 degrees; and / or, The air outlet member further includes a first air inlet, and the opening direction of the first air inlet is consistent with the opening direction of the second air outlet.

14. The light source assembly according to claim 10, characterized in that: The air guiding member includes an air guiding channel connecting the second air inlet and the second air outlet, and an extending direction of the air guiding channel is consistent with an extending direction of the air guiding gap.

15. The light source assembly according to any one of claims 1 to 14, characterized in that: The preset percentage is any percentage between 5% and 100%; or, the preset percentage is any percentage greater than 50%; or, the preset percentage is any percentage greater than 75%; or, the preset percentage is any percentage greater than 90%.

16. A three-dimensional printer, characterized in that: include: Base; Printing platform; A moving component, disposed on the base, and connected to the printing platform to drive the printing platform to move; and The light source assembly of the 3D printer according to any one of claims 1 to 15, wherein the light source assembly is arranged in the base to project curing light toward the printing platform.

17. The three-dimensional printer according to claim 16, characterized in that: The light source assembly further comprises a reflector, which is arranged opposite to and tilted from the light source of the light source assembly, and is used to reflect the light projected by the light source; The base is provided with a third air inlet and at least one third air outlet connected to the interior thereof; The first air inlet of the air outlet of the light source assembly is connected to the third air inlet; If the number of the first air suction member of the light source assembly is one, the number of the first air outlet is one, and the air suction port of the first air suction member is connected to the third air inlet; If the number of the first air suction members of the light source assembly is two or more, the number of the third air outlets is two or more; the air suction port of at least one of the first air suction members is connected to at least one of the third air outlets; and the air suction port of at least another of the first air suction members is connected to at least another of the third air outlets.

18. The three-dimensional printer according to claim 16, characterized in that: The light source assembly further comprises a light shield, which is arranged opposite to the light source of the light source assembly, and the light emitted by the light source is emitted through the light shield; The bottom of the base is provided with a fourth air inlet and a fourth air outlet connected to the interior thereof; The first air inlet of the air outlet of the light source assembly is connected to the fourth air inlet; The second air outlet of the air guide of the light source assembly is communicated with the fourth air outlet.

19. The three-dimensional printer according to claim 18, characterized in that: The base is provided with at least one fifth air inlet and a fifth air outlet connected to the interior thereof; The 3D printer further includes a second air suction member, which is disposed in the base, wherein an air suction port of the second air suction member is connected to the fifth air inlet, and an air outlet of the second air suction member is connected to the fifth air outlet.

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