Heat dissipation device of 3D printer

Abstract

The utility model relates to a heat dissipation device of a 3D printer, and aims to solve the problem that in the printing process of the 3D printer, a wax model which is sprayed by a printing nozzle and is stacked and molded is difficult to cool and shape quickly due to high temperature. The heat dissipation device comprises a shell, a plurality of air inlets are formed in the upper end of the shell, and air inlet fans are installed at the air inlets; an air outlet is formed in the lower end of the shell, an airflow channel is formed in the shell, the cross section area of the airflow channel is gradually reduced from the air inlet end to the air outlet end, and an acute included angle is formed between the air outlet direction of the air inlet fan and the central axis of the airflow channel, so that external air is obliquely injected into the airflow channel and flows downwards along the airflow channel; and finally, the airflow vertically flows downwards from the air outlet to form an efficient airflow cooling path which directly acts on the surface of the wax model, so that rapid cooling is realized. The heat dissipation device has the characteristics of simple structure, high cooling efficiency, intelligent temperature control, easiness in maintenance and the like, is specially designed for rapid cooling and shaping of the wax model, and is suitable for various application scenes of wax model printing.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printer equipment technical field especially relates to the heat abstractor of 3D printer. BACKGROUND

[0002] As a kind of rapid prototyping technology, 3D printing technology has been widely applied in industrial manufacturing, medical treatment, education and other fields in recent years. Among them, 3D printing technology based on wax material has important application value in jewelry design, precision parts manufacturing and other fields due to its high precision, high surface quality and process characteristics suitable for investment casting. However, in the process of printing wax model, the wax material sprayed by the printing nozzle is usually in a high temperature state when it is accumulated and formed. If it cannot be cooled and shaped in time, it may cause model deformation, rough surface or size precision decline, etc., affecting the final printing quality.

[0003] Traditional cooling methods rely mainly on natural cooling or simple fan cooling, but these methods have low cooling efficiency and uneven cooling, which cannot meet the needs of high-precision wax model printing. In addition, wax material is sensitive to temperature changes, and too fast or too slow cooling may cause model defects. Therefore, developing an efficient and controllable heat dissipation device to achieve rapid and uniform cooling of wax mold has become a key technical requirement to improve the quality of 3D printed wax model.

[0004] Existing heat dissipation devices are mainly designed for 3D printing of plastic or metal materials, and their cooling methods and air flow paths are not completely suitable for the characteristics of wax material. Therefore, there is an urgent need for a heat dissipation device specially designed for wax model printing, which can achieve efficient cooling of wax model through optimization of air flow path and intelligent temperature control, thereby improving printing precision and forming efficiency. INVENTION CONTENTS

[0005] To solve the existing problems, the utility model provides a kind of heat dissipation device of 3D printer, this heat dissipation device has the characteristics such as simple structure, high cooling efficiency, intelligent temperature control and easy maintenance, is designed specially for the rapid cooling and shaping of wax model, and is suitable for various application scenarios of wax model printing.

[0006] The utility model provides a kind of heat dissipation device of 3D printer, including shell, the upper end of shell is provided with multiple air inlets, air inlet is all installed with air inlet fan;The lower end of shell is provided with air outlet, and air flow channel is formed in shell, the cross-sectional area of air flow channel gradually decreases from air inlet end to air outlet end, the air outlet direction of air inlet fan and the central axis of air flow channel are acute angle included angle, so that external air is obliquely injected into air flow channel, and flows downward along air flow channel, and finally flows vertically downward from air outlet.

[0007] Preferably, a temperature sensor is further included and arranged at the air outlet to monitor the air outlet temperature in real time and dynamically adjust the rotating speed of the air inlet fan according to the temperature change.

[0008] Preferably, the shell comprises a shell body and a side cover plate, and the side cover plate is fixedly connected with the shell body by screws, facilitating disassembly and maintenance.

[0009] Preferably, the upper end of the side cover plate is provided with a mounting hole for mounting and fixing the heat dissipation device on the 3D printer, ensuring the stability of the device.

[0010] Preferably, the shell is made of aluminum alloy to improve the overall strength and heat dissipation performance while reducing the weight of the device.

[0011] Preferably, the air inlet of the shell is provided with a filter screen to prevent dust from entering the airflow channel.

[0012] The technical effect of the heat dissipation device of the 3D printer is provided.

[0013] 1. Through the air inlet, airflow channel and air outlet structure, external air is obliquely injected into the airflow channel under the action of the air inlet fan and finally blows vertically downward from the air outlet. This airflow design can directly and uniformly act on the surface of the wax model to achieve rapid cooling and effectively avoid problems such as deformation, rough surface or size precision reduction of the wax model caused by high temperature, significantly improving the printing quality.

[0014] 2. By arranging a temperature sensor at the air outlet, the air outlet temperature is monitored in real time, and the rotating speed of the air inlet fan is dynamically adjusted according to the temperature change to realize intelligent temperature control. This design can automatically adjust the cooling intensity according to the cooling requirements of the wax model to ensure that the model defects caused by excessive cooling or slow cooling.

[0015] 3. The shell adopts a modular design, including a shell body and a side cover plate, and the side cover plate is fixed by screws, facilitating disassembly and maintenance. At the same time, the side cover plate is provided with a mounting hole at the upper end, facilitating the stable installation of the heat dissipation device on the 3D printer and adapting to the installation requirements of different models. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0017] Figure 1 is a structural schematic view of the heat dissipation device of the 3D printer according to the present application.

[0018] Figure 2 is another perspective view of the heat dissipation device of the 3D printer according to an embodiment of the present application;

[0019] Figure 3 is a schematic view of the heat dissipation device of the 3D printer according to an embodiment of the present application installed on the printer;

[0020] Figure 4 is a schematic view of part of the heat dissipation device of the 3D printer according to an embodiment of the present application;

[0021] Figure 5 is a schematic view of the shell main body structure of the heat dissipation device of the 3D printer according to an embodiment of the present application;

[0022] Figure 6 is a schematic view of the side cover plate structure of the heat dissipation device of the 3D printer according to an embodiment of the present application.

[0023] Reference signs: shell 1, shell main body 11, side cover plate 12, mounting hole 121, air inlet 2, air inlet fan 3, air outlet 4, airflow passage 5, temperature sensor 6, printer 10 DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The heat dissipation device of the 3D printer according to the present embodiment comprises a shell 1, an air inlet fan 3 and a temperature sensor 6.

[0026] The shell 1 is made of aluminum alloy or hard plastic, and the upper end is provided with six air inlets 2 arranged in a line. The air inlets 2 are circular openings, and each air inlet 2 is provided with an air inlet fan 3. The lower end of the shell 1 is provided with an air outlet 4, which is a long strip-shaped opening. The opening width of the air outlet 4 is smaller than the diameter of a single air inlet 2, forming an airflow passage 5 with a gradually decreasing cross-sectional area from the air inlet end to the air outlet end. A filter screen (not shown in the figure) is arranged at the air inlet 2 of the shell 1 to prevent dust from entering the airflow passage 5. It should be noted that the air inlets 2 and the air outlet 4 are not limited to circular or long strip-shaped openings, but can also adopt other opening shapes.

[0027] The air outlet direction of the air inlet fan 3 forms an acute angle with the central axis a1-a2 of the air flow channel 5, so that the external air is obliquely injected into the air flow channel 5 and flows downward along the air flow channel 5, and finally flows vertically downward from the air outlet 4 to blow on the surface of the printed model on the printer platform. The inner wall of the air flow channel 5 is smooth, which ensures smooth air flow and reduces turbulent loss.

[0028] The temperature sensor 6 is installed at the air outlet 4 of the lower end of the shell 1, and the temperature sensor 6 is multiple, preferably 3, for real-time monitoring of the outlet temperature and transmitting the temperature signal to the control unit, and the control unit adjusts the rotating speed of the air inlet fan 3 according to the temperature change.

[0029] As shown in Figure 5 and Figure 6 The shell 1 includes a shell body 11 and a side cover plate 12, and the side cover plate 12 is fixedly connected with the shell body 11 by screws, which is convenient for disassembly and maintenance. The upper end of the side cover plate 12 is provided with a mounting hole 121 for mounting and fixing the heat dissipation device on the 3D printer, so as to ensure the stability of the device.

[0030] The working process of the heat dissipation device is as follows:

[0031] Step 1: After starting the 3D printer, the air inlet fan of the heat dissipation device starts to work, and the external air is obliquely injected into the air flow channel through the air inlet.

[0032] Step 2: The air flows downward along the air flow channel, gradually accelerates during the flow process, and finally blows vertically downward from the air outlet to directly act on the surface of the wax model, so as to realize rapid cooling.

[0033] Step 3: The temperature sensor monitors the temperature at the air outlet in real time and transmits the temperature data to the control unit to adjust the rotating speed of the air inlet fan.

[0034] Step 4: After the printing is completed, the heat dissipation device automatically stops working.

[0035] The above only describes the preferred embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat dissipation device of a 3D printer, characterized in that, Including the shell (1), the upper end of the shell (1) is provided with a plurality of air inlets (2), and the air inlet (2) is provided with an air inlet fan (3); The lower end of the shell (1) is provided with an air outlet (4), and the shell (1) is formed with an airflow channel (5), the cross-sectional area of the airflow channel (5) gradually decreases from the air inlet end to the air outlet end, the air outlet direction of the air inlet fan (3) and the central axis of the airflow channel (5) are acute angle, so that the external air is obliquely injected into the airflow channel (5), and flows downward along the airflow channel (5), and finally flows vertically downward from the air outlet (4).

2. The heat dissipating device according to claim 1, wherein It also includes a temperature sensor (6) arranged at the air outlet (4) for real-time monitoring of the outlet air temperature, and dynamically adjusting the rotating speed of the air inlet fan (3) according to the temperature change.

3. The heat dissipating device of claim 2, wherein, The shell (1) includes a shell body (11) and a side cover plate (12), the side cover plate (12) is fixedly connected with the shell body (11) through screws, which is convenient for disassembly and maintenance.

4. The heat dissipating device according to claim 3, wherein The upper end of the side cover plate (12) is provided with a mounting hole (121), and the mounting hole (121) is used for mounting and fixing the heat dissipation device on the 3D printer (10), ensuring the stability of the device.

5. The heat dissipating device of claim 4, wherein, The material of the shell (1) is aluminum alloy, which improves the overall strength and heat dissipation performance, and reduces the weight of the device.

6. The heat dissipating device of claim 1, wherein The air inlet (2) of the shell (1) is provided with a filter screen to prevent dust from entering the airflow channel (5).

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