Air duct assembly, printer head and three-dimensional printer

Abstract

The utility model provides an air duct assembly, a printer head and a three-dimensional printer. The air duct assembly is used for being detachably assembled on a printer head and comprises a shell. The shell part is hollow, and a flow channel is formed in the hollow position; at least a first opening and two symmetrically arranged second openings are formed in the shell, and the flow channel is communicated with the openings; the opening directions of the second openings are opposite, the first opening is located on the symmetry axis of the two second openings, the opening direction of the first opening deviates from the second openings, and the first opening is used for being communicated with an air outlet of a cooling fan. According to the air duct assembly, the printer head and the three-dimensional printer, the printed piece near the printing nozzle can be fully cooled, so that the airflow concentration phenomenon is reduced, and the situation that the printed piece is cooled unevenly is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of three-dimensional printing equipment, and more specifically, relates to an air duct assembly, a printer head, and a three-dimensional printer. Background Art

[0002] Existing 3D printers fail to fully consider airflow distribution in the design of their cooling ducts. When air is blown out of the duct or fan outlet at high speed, excessive airflow concentration or improper outlet design creates a strong airflow barrier, leading to concentrated airflow in certain areas of the cooling duct. This airflow barrier impedes the flow of surrounding air, making it difficult for cooler air to effectively enter the cooling area, thus affecting the cooling effect. When local air volume is excessive, the cooling effect is actually reduced, leading to localized overheating. This can cause uneven cooling of the printed part, resulting in localized collapse or warping, which is particularly noticeable when printing large objects or complex structures. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide an air duct assembly, a printer head and a three-dimensional printer to solve the technical problem of uneven cooling of printed parts existing in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the first aspect of the present application is to provide an air duct assembly, which includes a shell; the shell portion is hollow and a flow channel is formed at the hollow position; at least a first opening and two symmetrically arranged second openings are formed on the shell, and the flow channel connects the openings; the opening directions of the second openings are opposite, the first opening is located on the symmetry axis of the two second openings and its opening direction is away from each second opening, and the first opening is used to connect the air outlet of the cooling fan.

[0005] Optionally, the second opening is extended in a straight line; or, the second opening is extended along an arc, and the arc centers of the two second openings are located in the same axial direction as the nozzle on the printer head.

[0006] Optionally, the shell includes a main body and two side wings, and the two side wings are arranged on the same side of the main body and are spaced apart; the first opening is opened in the main body, and each second opening is opened in each side wing.

[0007] Optionally, the side wing portion is arranged to gradually shrink in a direction away from the main body portion; and / or, the side wall of the side wing portion opposite to the second opening is arranged in an arc shape.

[0008] Optionally, one side of the housing on which the first opening is formed is tilted, with the top thereof tilted toward the printer head.

[0009] Optionally, a third opening is further provided on the side of the shell opposite to the first opening, and the third opening is located between the two second openings.

[0010] Optionally, a guide vane is provided in the flow channel; the guide vane is used to guide the airflow from the first opening to each of the second openings; and / or, at least part of the guide vane is provided at a position in the flow channel facing the third opening, and the guide vane is used to guide the airflow to each of the second openings and the third opening respectively.

[0011] Optionally, at least two clamping arms are further provided on the housing, and the clamping arms are used to clamp the air duct assembly to the printer head; the clamping direction of the clamping arms is perpendicular to the axial direction of the printer head.

[0012] In an embodiment of the second aspect of the present application, a printer head is proposed, comprising: a print nozzle; a bracket, arranged on the print nozzle, and having a snap-in position on the bracket; the aforementioned air duct assembly, wherein each snap-in arm is snap-into each of the snap-in positions, and each second opening is located on opposite sides of the print nozzle; and a cooling fan, fixedly arranged on the bracket and having an air outlet facing the first opening on the air duct assembly.

[0013] In an embodiment of the third aspect of the present application, a three-dimensional printer is proposed, which includes a frame and a driving device arranged on the frame, a printing platform and the aforementioned printer head, wherein the printer head is driven by the driving device to perform printing operations on the printing platform.

[0014] The air duct assembly, printer head, and 3D printer provided by the embodiments of the present application have at least the following beneficial effects:

[0015] By detachably arranging the air duct assembly on the printer head, the cooling fan is detachably arranged on the air duct assembly and located on one side of the printer head. In this way, the cooler air blown out by the cooling fan can flow out through the second opening to fully dissipate the heat of the printed part near the print nozzle, thereby reducing the air flow concentration phenomenon and avoiding uneven cooling of the printed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figures 1 to 3A perspective view of an air duct assembly in some embodiments of the present application;

[0018] Figure 4 A perspective view of a printer head in some embodiments of the present application;

[0019] Figure 5 An exploded view of a printer head in some embodiments of the present application;

[0020] Figure 6 This is a three-dimensional diagram of a three-dimensional printer in some embodiments of the present application. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0023] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element.

[0024] When an element is referred to as being “connected to” another element, it can be directly connected to the another element or indirectly connected to the another element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0027] In the description of the present application, “plurality” means two or more, unless otherwise clearly defined.

[0028] Please also refer to Figures 1 to 6 , the air duct assembly, printer head and 3D printer provided in the embodiments of the present application are now described.

[0029] refer to Figures 1 to 3 The air duct assembly of the embodiment of the present application includes a housing 100. Specifically, the housing 100 is partially hollow and a flow channel is formed in the hollow position; at least a first opening 111 and two symmetrically arranged second openings 112 are formed on the housing 100, and the flow channel connects the openings; the opening directions of the two second openings 112 are opposite to each other and there is a distance between the two second openings 112; the first opening 111 is located on the symmetry axis of the two second openings 112 and its opening direction is away from each second opening 112. The first opening 111 is used to connect to the air outlet of the cooling fan 400.

[0030] refer to Figures 4 to 6 When in use, the air duct assembly is assembled to the bottom of the printer head 200. After assembly, the nozzle 210 on the printer head 200 is accommodated in the gap between the two second openings 112, and the cooling fan 400 is located on one side of the printer head 200.

[0031] On the one hand, the cooler air sent by the cooling fan 400 enters the flow channel and can flow out from the two second openings 112 at the same time. Moreover, after flowing out from the second openings 112, the cooler air can dissipate heat from the printed workpiece near the nozzle 210 from two opposite directions at the same time, thereby avoiding the problem of airflow concentration caused by the size of the opening when the cooler air flows out from a single opening. The printed workpiece near the nozzle 210 can be effectively cooled, thereby preventing uneven cooling of the printed workpiece.

[0032] On the other hand, the cooling fan 400 is disposed on the side of the air duct assembly, so that the projection area of ​​the printer head 200 in the printing height direction is smaller, thereby preventing the printer head 200 from colliding with or interfering with the printed workpiece during printing.

[0033] In some embodiments, the second openings 112 are extended in a straight line, that is, each second opening 112 is arranged parallel to the two sides of the nozzle 210; or, the second openings 112 are extended along an arc, and the arc centers of the two second openings 112 are located in the same axial direction as the nozzle 210 on the printer head 200. In this way, the airflow flowing out through the second openings 112 can supply air and dissipate heat from all angles near the nozzle 210, so as to effectively accelerate the heat dissipation speed of the printed part near the nozzle 210.

[0034] refer to Figures 1 to 3 In some embodiments, the housing 100 includes a main body 120 and two side wings 130, which are disposed on the same side of the main body 120 and spaced apart from each other. A first opening 111 is formed in the main body 120, and second openings 112 are respectively formed in the side wings 130. The aforementioned flow channel is the hollow area formed within the main body 120 and the side wings 130.

[0035] refer to Figures 1 to 3 In a further embodiment, the flow channel is configured to gradually contract in a direction approaching the second opening 112, so that after the airflow reaches the vicinity of the second opening 112, it can be well guided to the vicinity of the nozzle 210, thereby effectively dissipating heat from the printed workpiece near the nozzle 210. Specifically, the side wing portion 130 is configured to gradually contract in a direction away from the main body portion 120, so that the cross-section of the flow channel within the side wing portion 130 can gradually decrease in a direction away from the first opening 111; alternatively, the side wall of the side wing portion 130 opposite the second opening 112 is configured to be curved, similarly to enable the cross-section of the flow channel within the side wing portion 130 to gradually decrease in a direction away from the first opening 111.

[0036] refer to Figure 3 and Figure 4 In some embodiments, the side of the housing 100 with the first opening 111 is tilted, with the top of the side tilted toward the printer head 200. By tilting the side of the housing 100 with the first opening 111, when the cooling fan 400 is mounted at the first opening 111, the cooler air delivered by the cooling fan 400 can enter the flow channel as smoothly as possible and quickly flow to the second openings 112, thereby reducing airflow concentration in the flow channel and achieving rapid heat dissipation of the printed part near the printer nozzle 210.

[0037] refer to Figures 1 to 3 Based on any of the above embodiments, a third opening 113 is further provided on the side of the housing 100 opposite the first opening 111. The third opening 113 is located between the two second openings 112. In other words, the third opening 113 and the two second openings 112 can form a C-shaped air outlet at the printer nozzle 210, thereby allowing the printed workpiece near the printer nozzle 210 to receive cooling air from as many angles as possible. It is understood that the opening size of the third opening 113 can be larger than the opening size of the second opening 112, and this is not a limitation.

[0038] refer to Figure 3 Based on the above-mentioned embodiment in which the third opening 113 is provided, a guide vane 140 is provided in the flow channel; the guide vane 140 is used to guide the airflow from the first opening 111 to each second opening 112; and / or, at least part of the guide vane 140 is provided at a position in the flow channel directly opposite the third opening 113, and the guide vane 140 is used to guide the airflow to each second opening 112 and the third opening 113 respectively.

[0039] Specifically, in some embodiments, a guide plate 140 is provided in the side wing portion 130 near each second opening 112 . The guide plate 140 may be formed on a side wall of the side wing portion 130 or on a bottom wall of the side wing portion 130 .

[0040] refer to Figure 3 In other embodiments, a guide vane 140 is disposed in the main body 120 directly opposite the third opening 113. Preferably, at least two guide vanes 140 are symmetrically arranged to guide airflow symmetrically to each of the second openings 112, thereby evenly dissipating heat on both sides of the printed workpiece near the printer nozzle 210. Furthermore, the two symmetrically arranged guide vanes 140 are spaced apart to allow airflow to flow between the two guide vanes 140 toward the third opening 113.

[0041] refer to Figures 1 to 5 In addition to any of the above embodiments, at least two clamping arms 150 are further provided on the housing 100. The clamping arms 150 are used to clamp the air duct assembly to the printer head 200; the clamping direction of the clamping arms 150 is perpendicular to the axial direction of the printer head 200. The provision of the clamping arms 150 allows the air duct assembly to be quickly and conveniently assembled to the printer head 200. Furthermore, at least one of the clamping arms 150 is provided with a threaded hole. Once the air duct assembly is clamped to the printer head 200, it can be secured by tightening the screws.

[0042] refer to Figure 4 and Figure 5 In a second embodiment of the present application, a printer head 200 is provided, comprising a printer nozzle 210, a bracket 220, the aforementioned air duct assembly, and a cooling fan 400. The bracket 220 is mounted on the printer nozzle 210 and is used to connect and secure the air duct assembly. Specifically, the bracket 220 is provided with a snap-fit ​​position 221, and each snap-fit ​​arm 150 on the air duct assembly snaps into each snap-fit ​​position 221. Furthermore, after the air duct assembly is assembled, each second opening 112 is located on opposite sides of the printer nozzle 210. The cooling fan 400 is fixedly mounted on the bracket 220, with its air outlet facing the first opening 111 on the air duct assembly.

[0043] refer to Figure 6 In an embodiment of the third aspect of the present application, a three-dimensional printer is proposed, which includes a frame 310, a driving device 320 arranged on the frame 310, a printing platform 330 and the printer head 200 in the aforementioned embodiment. The printer head 200 is driven by the driving device 320 to perform printing operations on the printing platform 330.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An air duct assembly for detachably assembling on a printer head, characterized in that: The invention comprises a shell; the shell is partially hollow and a flow channel is formed at the hollow position; the shell is formed with at least a first opening and two symmetrically arranged second openings, and the flow channel connects the openings; The opening directions of the second openings are opposite to each other, the first opening is located on the symmetry axis of the two second openings and its opening direction is away from each second opening, and the first opening is used to connect to the air outlet of the cooling fan.

2. The air duct assembly according to claim 1, wherein: The second opening is extended in a straight line; or, the second opening is extended along an arc, and the arc centers of the two second openings are located in the same axial direction as the nozzle on the printer head.

3. The air duct assembly according to claim 2, wherein: The shell includes a main body and two side wings, and the two side wings are arranged on the same side of the main body and are spaced apart. The first opening is opened in the main body, and each second opening is opened in each side wing.

4. The air duct assembly according to claim 3, wherein: The side wing portion is gradually contracted in a direction away from the main body portion; and / or a side wall of the side wing portion opposite to the second opening is arranged in an arc shape.

5. The air duct assembly according to claim 1, wherein: The side of the housing where the first opening is formed is tilted, with the top thereof tilted toward the printer head.

6. The air duct assembly according to claim 1, wherein: A third opening is further provided on the side of the shell opposite to the first opening, and the third opening is located between the two second openings.

7. The air duct assembly according to claim 6, wherein: A guide vane is provided in the flow channel; the guide vane is used to guide the airflow from the first opening to each of the second openings; and / or, at least part of the guide vane is provided at a position in the flow channel facing the third opening, and the guide vane is used to guide the airflow to each of the second openings and the third opening respectively.

8. The air duct assembly according to any one of claims 1 to 7, characterized in that: At least two clamping arms are further provided on the housing, and the clamping arms are used to clamp the air duct assembly to the printer head; the clamping direction of the clamping arms is perpendicular to the axial direction of the printer head.

9. A printer head, characterized in that: include: Print nozzle; A bracket is provided on the printing nozzle, and a snap-in position is provided on the bracket; The air duct assembly according to any one of claims 1 to 8, wherein each clamping arm is clamped in each of the clamping positions, and each second opening is located on opposite sides of the printing nozzle; The cooling fan is fixedly arranged on the bracket and the air outlet of the fan is directly facing the first opening of the air duct assembly.

10. A three-dimensional printer, characterized in that: include: frame; A driving device, a printing platform and the printer head according to claim 9 are arranged on the frame, and the printer head is driven by the driving device to perform a printing job on the printing platform.

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