A cavity temperature regulation system

Abstract

The utility model discloses a cavity temperature regulation system relates to three -dimensional printer cavity temperature regulation technical field, including air induction mechanism and exhaust mechanism. The air induction mechanism's air induction pipeline forms inside and outside circulation air inlet channel, and air induction baffle switches position under the drive of member, and one channel can be selectively blocked to switch the air inlet source. In the exhaust mechanism, the air exhaust pipeline air inlet end is connected with the printer cavity, the filter core is arranged in the air exhaust pipeline, and the airflow generating unit discharges the gas in the cavity through the filter core and the air exhaust pipeline. The system can switch the air inlet according to the printing demand, improve the cavity temperature regulation efficiency, filter the peculiar smell gas, and solve the problems of slow heating and air pollution in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing equipment technology, specifically a cavity temperature regulation system. Background Technology

[0002] 3D printing technology, also known as additive manufacturing technology, is a technique for manufacturing solid parts by adding materials layer by layer based on three-dimensional data. In a closed-structure filament melt extrusion 3D printer, heat is generated by internal heat sources (heating elements at the nozzle and the heated bed) during the printing process, resulting in an internal temperature higher than room temperature.

[0003] Different consumables require different chamber temperatures during printing. For example, PLA and ABS have different sensitivities to ambient temperature during printing. PLA is more adaptable to ambient temperature, generally with a bed temperature range of 50-60°C and an chamber temperature not exceeding 40°C. ABS, on the other hand, is more sensitive to interlayer adhesion issues. For instance, when printing high-strength ABS parts, it is recommended to set the room temperature above 65°C to promote adhesion between layers and release internal stress. If the printing ambient temperature is too low or the flow rate is insufficient, the interlayer adhesion of ABS will be affected, leading to a reduction in part strength.

[0004] The cavity temperature regulation in the prior art has the following problems: (1) In the prior art, the cavity temperature regulation mainly uses a fan to drive the air outside the 3D printer chamber into the air duct. A heating component is set in the air duct, which heats the airflow in the air duct and gradually raises the cavity temperature. The heating efficiency is low and the waiting time is long. (2) The cavity temperature regulation mechanism in the prior art does not have an air filtration device, which directly discharges the odorous gas generated during the printing process to the outside of the printer chamber, polluting the air. Utility Model Content

[0005] The purpose of this invention is to provide a cavity temperature regulation system to solve the problems of low heating efficiency, long waiting time, lack of air filtration device, and direct discharge of odorous gas generated during printing that pollutes the air in the existing technology. This invention aims to provide the above-mentioned cavity temperature regulation system to achieve switching of air intake sources to improve cavity temperature regulation efficiency, while filtering the exhaust gas to avoid air pollution.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cavity temperature regulation system, comprising an exhaust mechanism and an exhaust mechanism; The air intake mechanism includes an air intake duct, an air intake baffle, and a driving component. The air intake duct forms at least two air intake channels, namely an internal circulation air intake channel for introducing air into the printer cavity and an external circulation air intake channel for introducing air from outside the printer cavity. The air intake baffle can be switched in position under the action of the driving component to selectively block the internal circulation air intake channel or the external circulation air intake channel, thereby switching the air intake source. The exhaust mechanism includes an exhaust duct, an airflow generating unit, and a filter element. The air inlet of the exhaust duct is connected to the printer cavity. The filter element is disposed inside the exhaust duct. The airflow generating unit is used to filter the gas inside the printer cavity through the filter element and then discharge it to the outside of the cavity through the exhaust duct.

[0007] To further optimize this utility model, the following technical solutions may be preferred: Preferably, the air intake duct includes an upper air intake channel and a lower air intake channel that cooperate with each other, and the upper air intake channel and the lower air intake channel together form the inner circulation air intake channel and the outer circulation air intake channel.

[0008] Preferably, the driving component includes an air-guiding knob and a connecting assembly. The air-guiding knob is connected to the air-guiding baffle through the connecting assembly. Rotating the air-guiding knob can drive the air-guiding baffle to switch positions.

[0009] Preferably, the connecting assembly includes a connecting screw, and the air-guiding knob passes through the lower air-guiding channel and is fixedly connected to the air-guiding baffle by the connecting screw.

[0010] Preferably, the driving component is a motor, which is drivenly connected to the air duct baffle, and the motor can drive the air duct baffle to switch positions.

[0011] Preferably, the air intake baffle is an electrically controlled valve, which can selectively block the internal circulation air intake channel or the external circulation air intake channel by controlling its on / off state.

[0012] Preferably, the exhaust mechanism further includes an upper shell body and a filter cover, the filter element is fixed inside the upper shell body by the filter cover, and the exhaust duct and airflow generating unit are both disposed in the upper shell body.

[0013] Preferably, the exhaust duct includes an air outlet duct and a top cover. One end of the air outlet duct is connected to the airflow generating unit, and the other end is connected to the air outlet of the top cover. The top cover is located on the top of the printer.

[0014] Preferably, the device further includes a temperature sensor and a control unit. The temperature sensor is disposed inside the printer cavity and is used to detect the cavity temperature. The control unit is electrically connected to the temperature sensor, the drive component of the induced draft mechanism, and the airflow generating unit of the exhaust mechanism, and can control the operation of the drive component and the airflow generating unit according to the detection result of the temperature sensor.

[0015] Preferably, the temperature sensor is a temperature sensing wire, which is disposed inside the wire box, and the control unit is fixedly disposed inside the printer.

[0016] This utility model has the following beneficial effects: Efficient cavity temperature regulation: The air intake mechanism switches between internal and external circulation air intake channels through the air intake baffle. When printing requires heating (such as printing ABS), it switches to internal circulation to quickly raise the temperature using the cavity's own heat, without the need for additional high-power heating, thus solving the problems of low heating efficiency and long waiting time in traditional heating. When cooling is required or to adapt to low cavity temperature consumables (such as PLA), it switches to external circulation to introduce outside air, flexibly meeting the temperature requirements of different consumables. Purified exhaust: The filter element of the exhaust system can filter out odorous gases generated during printing, preventing direct emission of polluting air and improving the operating environment. Adaptable to various scenarios: The drive components can be controlled manually (knob) or automatically (motor, electric valve). Manual adjustment reduces costs, while automatic adjustment, combined with temperature sensors and control units, achieves intelligent temperature control and improves ease of operation. Reliable structure: The exhaust duct is enclosed by upper and lower channels to form a stable air duct, and the exhaust duct is tightly connected to the top cover and other components, with a clear airflow path; the filter element is fixed by the filter element cover, the temperature sensor is located in the junction box, and all components are installed firmly to ensure long-term stable operation of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the ventilation system of this application; Figure 2 This is a schematic diagram of the induced draft switching mechanism; Figure 3 This is a schematic diagram of the induced draft switching mechanism using a rotating baffle. Figure 4 This is a schematic diagram of the cavity exhaust mechanism; Figure 5 This is a schematic diagram of the temperature sensing wire installation structure.

[0018] In the diagram: 1-Upper shell body; 2-Air intake mechanism; 3-Exhaust mechanism; 4-Temperature sensor; 201-Upper air intake channel; 202-Lower air intake channel; 203-Air intake knob; 204-Connecting screw; 205-Air intake baffle; 301-Exhaust duct; 302-Airflow generating unit; 303-Filter element. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0020] like Figure 1-4 As shown, this embodiment discloses a cavity temperature regulation system applied to a filament melt extrusion type 3D printer with a closed structure, which includes an air intake mechanism 2 and an exhaust mechanism 3 installed on the upper shell body 1 of the 3D printer. The air intake mechanism 2 includes an air intake duct, an air intake baffle 205, and a drive component. The air intake duct includes an upper air intake channel 201 and a lower air intake channel 202 that cooperate with each other, which together form at least two air intake channels, namely an internal circulation air intake channel and an external circulation air intake channel. The internal circulation air intake channel is used to introduce air into the printer cavity, and the external circulation air intake channel is used to introduce air from outside the printer cavity.

[0021] The driving component can be an air-expelling knob 203 and a connecting assembly, including a connecting screw 204. During installation, the air-expelling knob passes through the lower air-expelling channel, and the connecting screw is used to fix the air-expelling knob and the air-expelling baffle. The air-expelling baffle 205 can be switched in position by the air-expelling knob, selectively blocking the internal or external air-expelling channel to achieve switching of the air intake source. Of course, the driving component can also be a motor, which is connected to the air-expelling baffle to drive it to switch positions; the air-expelling baffle can also be replaced with an electrically controlled valve to selectively block the channel by on / off control.

[0022] The exhaust system includes an exhaust duct 301, an airflow generating unit 302, a filter element, an upper housing, and a filter element cover. The upper housing provides support for all components. The filter element is fixed inside the upper housing by the filter element cover. The exhaust duct and the airflow generating unit are both located within the upper housing. The exhaust duct includes an outlet duct and a top cover. One end of the outlet duct is connected to the airflow generating unit, and the other end is connected to the outlet of the top cover, which is located on the top of the printer. The inlet end of the exhaust duct is connected to the printer cavity. When the airflow generating unit is working, it filters the gas inside the cavity through the filter element and then discharges it through the exhaust duct.

[0023] The system also includes a temperature sensor and a control unit. The temperature sensor is a temperature sensing wire 4, which is located in the wire box and placed inside the printer cavity to detect the cavity temperature. The control unit is fixed inside the printer and is electrically connected to the temperature sensor, the drive component of the induced draft mechanism, and the airflow generating unit of the exhaust mechanism. It can control the operation of the drive component and the airflow generating unit based on the detection results of the temperature sensor.

[0024] When printing ABS, if heating is required, the control unit can control the drive unit to move the air intake baffle to block the external air circulation channel and open the internal circulation, using the heat of the cavity itself to quickly raise the temperature; when printing PLA, the internal air circulation channel can be blocked and the external circulation can be opened. At the same time, the airflow generation unit continues to work, and the gas is discharged after being filtered by the filter element to avoid contamination.

[0025] To further explain the application scenarios of this device, the installation and usage process of this device is as follows: During installation, first, pass the air intake knob through the lower air intake duct, then use connecting screws to fix the air intake knob and the air intake baffle together, and finally snap on the upper air intake duct and lock it in place with screws.

[0026] During printing, the internal heat source of the machine generates heat, resulting in a high temperature inside the machine cavity. Different consumables require different temperatures during printing. Therefore, the air intake channel can be controlled by manually rotating the knob and lever. For example, when printing ABS material, blocking the first air intake (closing the external circulation air intake channel) allows the higher-temperature airflow inside the cavity to enter the fan and then be blown out through the pipes from the effector, thus achieving internal circulation. When printing PLA material, blocking the second air intake (closing the internal circulation air intake channel) achieves external circulation.

[0027] Note that in other embodiments, the air intake knob can be replaced with a motor-controlled mechanism, allowing the machine to automatically adjust the baffle position based on the different consumables used during printing to achieve internal and external air intake. In other embodiments, the baffle can also be replaced with an electrically controlled valve.

[0028] In this embodiment, during the temperature rise of the 3D printer cavity, a high-temperature airflow can be absorbed from the printer's internal cavity and then blown out through a pipe from the effector. The heating element of the nozzle in the effector heats the blown gas and accelerates the flow of gas on the heated bed, thereby achieving an internal circulation state and rapidly heating the temperature of the gas inside the cavity (the temperature rise mainly relies on the heating wire at the heated bed and the heating element at the nozzle). Compared to simply absorbing room-temperature airflow from outside the chamber into the internal cavity, this embodiment can accelerate the temperature rise of the 3D printer cavity without increasing the heating power of the cavity temperature regulation module.

[0029] When it is necessary to lower the temperature inside the cavity, the high-temperature airflow inside the cavity can be discharged through the exhaust system, and airflow from the outside of the cavity can be introduced through the exhaust system to achieve rapid cooling. See also Figure 4The ventilation system includes a fan and a fan exhaust duct. Upper housing: Provides support for the filter, fan, and fan exhaust duct. Filter cover: Secures the filter. Filter: Filters odorous gases. Fan: A ventilation device that draws air from the cavity to the outside of the machine. Fan exhaust duct: Acts as a drainage channel, expelling the air drawn by the fan through the top cover. Top cover: The machine's upper cover, serving an aesthetic purpose and featuring an air outlet. Screws: Secure the fan exhaust outlet.

[0030] The printing area produces an odor from the molten filament, necessitating the venting of this odor to the outside of the machine. This solution incorporates a filter to remove this odor. The fan exhaust duct has three screw holes, securing it to the upper housing. Ribs are incorporated into the fan exhaust duct to prevent air leakage when the fan is inserted into the exhaust port.

[0031] Figure 4 The diagram shows the airflow direction when the fan is operating. When the 3D printer is working, the fan rotates, drawing out contaminated air from the printing chamber through a filter and expelling it through the fan outlet and top cover outlet. The airflow is smooth throughout the process. By incorporating components at the fan outlet, the air drawn out after being filtered by filter element 303 is guided to the top cover outlet for easy discharge from the machine.

[0032] The fan / blower may also, or alternatively, include centrifugal fans, axial fans, centrifugal blowers, positive displacement blowers, crossflow fans, wall-attached effect devices, convection devices, or any combination of elements that can be used to generate airflow. The system described herein may also include multiple blowers.

[0033] See Figure 5 This application presents a schematic diagram of the installation structure of the temperature sensor. The temperature sensor uses a temperature-sensing wire, which is housed inside a junction box. The junction box is fixedly mounted on the column of the 3D printer. Junction box: Used to pass the wire and provides an aesthetically pleasing concealment of the wire. Temperature-sensing wire: An electronic device used to detect temperature.

[0034] In this embodiment, the control unit for controlling the blower and fan is fixedly installed inside the upper housing. The temperature sensor is connected to the control unit.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cavity temperature regulation system, characterized in that, Includes an exhaust system and a draft system; The air intake mechanism includes an air intake fan, an air intake duct, an air intake baffle, and a driving component. The air intake duct is connected to the air intake fan to form at least two air intake channels, namely an internal circulation air intake channel for introducing air into the printer cavity and an external circulation air intake channel for introducing air outside the printer cavity. The air intake baffle can be switched in position under the drive of the drive component to selectively block the internal circulation air intake channel or the external circulation air intake channel, thereby switching the air intake source of the induced draft fan. The exhaust mechanism includes an exhaust duct, an exhaust fan, and a filter element. The air inlet of the exhaust duct is connected to the printer cavity. The filter element is disposed inside the exhaust duct. The exhaust fan is used to filter the gas inside the printer cavity through the filter element and then discharge it to the outside of the cavity through the exhaust duct.

2. The cavity temperature regulation system according to claim 1, characterized in that, The air intake duct includes an upper air intake channel and a lower air intake channel that cooperate with each other. The upper air intake channel and the lower air intake channel together form the inner circulation air intake channel and the outer circulation air intake channel.

3. The cavity temperature regulation system according to claim 2, characterized in that, The driving component includes an air-guiding knob and a connecting assembly. The air-guiding knob is connected to the air-guiding baffle through the connecting assembly. Rotating the air-guiding knob can drive the air-guiding baffle to switch positions.

4. The cavity temperature regulation system according to claim 3, characterized in that, The connecting assembly includes a connecting screw, and the air-guiding knob passes through the lower air-guiding channel and is fixedly connected to the air-guiding baffle by the connecting screw.

5. The cavity temperature regulation system according to claim 1, characterized in that, The driving component is a motor, which is connected to the air duct baffle. The motor can drive the air duct baffle to switch positions.

6. The cavity temperature regulation system according to claim 1, characterized in that, The air intake baffle is an electrically controlled valve, which can selectively block the internal circulation air intake channel or the external circulation air intake channel by controlling its on / off state.

7. The cavity temperature regulation system according to claim 1, characterized in that, The exhaust mechanism also includes an upper shell body and a filter cover. The filter is fixed inside the upper shell body by the filter cover. The exhaust duct and the airflow generating unit are both located in the upper shell body.

8. The cavity temperature regulation system according to claim 1, characterized in that, The exhaust duct includes an air outlet duct and a top cover. One end of the air outlet duct is connected to the exhaust fan, and the other end is connected to the air outlet of the top cover. The top cover is located on the top of the printer.

9. A cavity temperature regulation system according to claim 1, characterized in that, It also includes a temperature sensor and a control unit. The temperature sensor is installed inside the printer cavity to detect the cavity temperature. The control unit is connected to the temperature sensor, the drive component of the air intake mechanism, and the exhaust mechanism, and can control the drive component and the airflow generation unit to work based on the detection results of the temperature sensor.

10. A cavity temperature regulation system according to claim 9, characterized in that, The temperature sensor is a temperature sensing wire, which is installed inside the wire box, and the control unit is fixedly installed inside the printer.

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