A laser scanning system heat dissipation and dehumidification structure
By combining a closed cavity design and a water-cooled heat dissipation system with a dehumidification device, the problem of condensation on optical components of metal printers in high-temperature and high-humidity environments is solved, achieving constant temperature and humidity control of optical components and improving printing accuracy and equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG HENGRUI TECH GRP CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-10
AI Technical Summary
Optical components in metal printers are prone to condensation in high temperature and humidity environments, causing water droplets to adhere to the lenses, affecting printing accuracy and increasing cleaning downtime.
It adopts a closed cavity design combined with a water-cooled heat dissipation system and a dehumidification device, integrating a synergistic solution of sealing, dehumidification and heat dissipation. It uses semiconductor dehumidifiers, desiccant containers or condensation dehumidifiers for dehumidification, and prevents condensation from forming through a nano-coating.
It achieves constant temperature and humidity control for optical components, preventing water droplets from adhering, improving printing accuracy, reducing downtime, and extending component life.
Smart Images
Figure CN224475608U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of metal 3D printing equipment, specifically to a heat dissipation and dehumidification structure for a laser scanning system. Background Technology
[0002] Currently, in metal printers, the various optical components (including lasers, collimators, laser galvanometers, and field lenses) generate heat when the laser passes through them. This heat can cause thermal effects on the lenses, affecting their performance. Therefore, a water-cooling system is needed to maintain the operating temperature of the optical components and control the thermal effects on the lenses as much as possible. However, in the hot and humid environment of southern regions, when the surface temperature of the optical components is lower than the ambient dew point temperature, condensation easily occurs. Existing technology has the following drawbacks: 1. It causes water droplets to adhere to the lenses or the inner wall of the cavity, leading to light scattering and reduced reflectivity, directly affecting printing accuracy; 2. Frequent cleaning of the optical cavity increases downtime.
[0003] To address this, a heat dissipation and dehumidification structure for a laser scanning system is proposed. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a heat dissipation and dehumidification structure for a laser scanning system, integrating a synergistic solution of sealing, dehumidification, and heat dissipation. By using a closed cavity design to block the intrusion of external moisture, and combining an active dehumidification device with nano-coating technology, it achieves constant temperature and humidity control of the working environment of optical devices.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A heat dissipation and dehumidification structure for a laser scanning system includes a base plate and a protective cover sealed to the base plate. The base plate and the protective cover form a closed cavity, and a laser scanning system, a water-cooled heat dissipation system, and a dehumidification device are disposed within the cavity.
[0007] Furthermore, the laser scanning system includes a laser, a collimator, a laser galvanometer, and a field mirror arranged sequentially along the propagation path of the laser beam.
[0008] Furthermore, the upper surface of the base plate is provided with columns, and an optical device mounting plate is connected between the two columns. The collimator is fixedly connected to one side of the optical device mounting plate, the laser galvanometer is fixedly connected to the other side of the optical device mounting plate, and the field lens is connected to the exit end of the reflected light path of the laser galvanometer.
[0009] Furthermore, the dehumidification device is selected from any one of a semiconductor dehumidifier, a desiccant container, or a condensation dehumidifier.
[0010] Furthermore, it also includes a humidity sensor and a controller. The humidity sensor is located inside the cavity, and the controller adjusts the working state of the dehumidifier according to the humidity sensor signal.
[0011] Furthermore, the protective cover is made of aluminum alloy and has an anti-condensation coating on its inner surface, with the coating surface having a lotus leaf-like micro-nano structure.
[0012] Furthermore, the water-cooled heat dissipation system actively dissipates heat from the optical components through circulating coolant; the cooling pipes of the water-cooled heat dissipation system are in direct contact with the mounting plate of the optical components or the optical component body.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This invention relates to a heat dissipation and dehumidification structure for a laser scanning system. It includes a base plate and a protective cover sealed to the base plate, forming a closed cavity. The cavity houses the laser scanning system, a water-cooled heat dissipation system, and a dehumidification device. This structure achieves a triple protection system—sealed cavity, water-cooled heat dissipation, and intelligent dehumidification—thus completely blocking dust intrusion and moisture effects through physical sealing and anti-condensation material technology. Rigid support and closed-loop temperature and humidity control ensure long-term optical accuracy. On-demand dehumidification and directional heat dissipation reduce energy consumption and extend device lifespan. By deeply coupling environmental humidity / temperature control with the optical system structure, it solves the reliability challenges of high-precision laser equipment in complex environments. Attached Figure Description
[0015] Figure 1 The diagram shown is a schematic of the heat dissipation and dehumidification structure of the laser scanning system of this utility model.
[0016] Figure 2 The image shown is a front-view internal schematic diagram of the heat dissipation and dehumidification structure of the laser scanning system of this utility model.
[0017] Figure 3 The diagram shown is an internal view of the heat dissipation and dehumidification structure of the laser scanning system of this utility model from the rear perspective.
[0018] Figure 4 The image shown is a side view of the internal structure of the heat dissipation and dehumidification structure of the laser scanning system of this utility model.
[0019] In the diagram: 1. Base plate; 2. Protective cover; 3. Collimator; 4. Laser galvanometer; 5. Field lens; 6. Column; 7. Optical component mounting plate; 8. Optical path output window; 9. Cover; 10. Connecting block. Detailed Implementation
[0020] 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.
[0021] See Figure 1-4 As shown, this utility model provides a technical solution: a heat dissipation and dehumidification structure for a laser scanning system, including a base plate 1 and a protective cover 2 sealed to the base plate. The base plate 1 and the protective cover 2 form a closed cavity, achieving IP65 level sealing through a sealing ring. The base plate 1 has reserved pipe connection ports and optical path output windows 8 to facilitate the connection of cooling pipes and condensate drainage pipes. In addition, the protective cover 2 can also have multiple maintenance windows or line interfaces, and the maintenance windows can be sealed with a cover 9 and a sealing ring, so that the cover 9 can be opened directly during maintenance without disassembling the entire protective cover 2, which is convenient for maintenance. The cavity houses a laser scanning system, a water-cooled heat dissipation system, and a dehumidification device. The sealed connection between the base plate 1 and the protective cover 2 forms a closed environment, structurally blocking the intrusion of external moisture or dust. At the same time, the integrated water-cooled heat dissipation system and dehumidification device achieve synergistic optimization of temperature management and humidity control, integrating the laser scanning system, water-cooled heat dissipation system, and dehumidification device into a single layout, reducing the risk of external environmental interference. It should be noted that this application does not show structural diagrams of the water-cooled heat dissipation system and dehumidification device, which are used in actual production and application. The following content will clearly and concisely describe the working principle of the water-cooled heat dissipation system and dehumidification device to facilitate those skilled in the art to fully understand after reading the specification.
[0022] The laser scanning system includes two sets of lasers, collimators 3, laser galvanometers 4, and field lenses 5 arranged sequentially along the laser beam propagation path. A column 6 is mounted on the upper surface of the base plate 1, and an optical component mounting plate 7 connects the two columns 6. The two collimators 3 are fixedly connected to one side of the optical component mounting plate 7 at intervals. Each of the two laser galvanometers 4 has a connecting block 10, which is used to fix them to the other side of the optical component mounting plate 7. The field lens 5 is connected to the exit end of the reflected light path of the laser galvanometer 4. It should be noted that the output end of the collimator 3 and the input end of the laser galvanometer 4 are axially connected. The combined design of the columns 6 and the optical component mounting plate 7 improves the vibration resistance and positional accuracy of the optical components, reducing calibration deviations caused by mechanical vibration or temperature deformation. The collimators 3 and laser galvanometers 4 are fixed separately on their sides, facilitating independent maintenance or replacement. A polyurethane damping pad can also be installed between the columns 6 and the base plate 1. This damping pad can absorb the linear expansion of the mounting plate 11, maintaining the positional accuracy of the optical components.
[0023] The water-cooling system actively dissipates heat from the optical components through circulating coolant. The cooling pipes of the water-cooling system are in direct contact with the mounting plate 7 or the optical component itself. The water-cooling system sets the coolant temperature, and the contact area between the copper cooling pipes and the optical component itself or mounting plate 11 is ≥80%. This direct contact design of the cooling pipes with the optical components specifically reduces the temperature of high-heat-generating components, preventing localized overheating from affecting optical performance. Water-cooling systems are a standard technology in equipment cooling, widely used in high-performance computer cases for CPU and GPU cooling. They offer advantages such as efficient heat dissipation, precise temperature control, space optimization, and quiet operation; therefore, this article will not elaborate on their specific components.
[0024] The working process of the water-cooled heat dissipation system is as follows: When the laser scanning system is started, the water-cooled heat dissipation system is also started; the pump starts working, pushing the coolant to circulate in the closed cooling pipes; the coolant comes into direct contact with the optical device mounting plate 11 or the optical device body through the cooling pipes, absorbing the heat generated by it; the heat of the optical device is transferred to the coolant through heat conduction; the coolant carrying heat flows to the heat sink; the heat sink dissipates the heat in the coolant to the external environment through heat sinks, fans or other heat dissipation mechanisms; after heat dissipation, the temperature of the coolant decreases, and it is ready to re-enter the circulation; the system continuously monitors the temperature and flow rate of the coolant to ensure that they are within the set range; based on the monitoring results, if it is necessary to adjust the cooling parameters, such as temperature and flow rate, the corresponding adjustments are made to provide continuous heat dissipation support for the optical device.
[0025] The dehumidification device is selected from any one of a semiconductor dehumidifier, a desiccant container, or a condensation dehumidifier. It offers three selectable dehumidification methods—semiconductor, desiccant, and condensation—to adapt to different environmental humidity requirements and enhance structural applicability. This embodiment uses a semiconductor dehumidifier, a device that utilizes the thermoelectric effect of semiconductor materials for dehumidification. Its core working principle is based on the Peltier effect, where a temperature difference is generated at the contact point when current passes through semiconductors of different materials, creating hot and cold sides. The semiconductor dehumidifier uses this principle to adsorb moisture from the air through the cold end and condense it into water, then discharges the water through the hot end, thus achieving dehumidification. This dehumidification process does not require traditional compressors and refrigerants, resulting in a simpler structure, lighter weight, and suitability for small-device industrial applications. Since semiconductor dehumidifiers are a common technology in the home appliance industry, their specific components will not be described in detail here.
[0026] It also includes a humidity sensor and a controller. The humidity sensor is located inside the cavity, and the controller adjusts the dehumidifier's operating status based on the humidity sensor signal. The closed-loop control of the humidity sensor and controller enables dynamic dehumidification response, avoiding energy waste or insufficient humidity caused by over-dehumidification.
[0027] The working process of a semiconductor dehumidifier is as follows: A humidity sensor inside the chamber monitors the ambient humidity in real time; the controller determines whether the dehumidifier needs to be activated based on a preset humidity threshold; if the humidity exceeds the threshold, the controller activates the semiconductor dehumidifier; the semiconductor dehumidifier utilizes the Peltier effect to adsorb moisture in the air inside the chamber at the cold end and condense it into water; the condensed water is discharged from the chamber through the hot end of the semiconductor dehumidifier; after dehumidification, the humidity sensor monitors the humidity inside the chamber again; judgment range: if the humidity reaches the set range, the controller shuts off the semiconductor dehumidifier; if it still exceeds the range, the dehumidification cycle continues.
[0028] The protective cover 2 is made of aluminum alloy and has an anti-condensation coating on its inner surface. The coating contains hydrophobic nano-silica particles, and the surface of the coating has a lotus leaf-like micro-nano structure. By combining the aluminum alloy protective cover 2 with the nano-coating, the material's thermal conductivity quickly equalizes the temperature, and the hydrophobicity of the lotus leaf-like structure works synergistically to prevent condensation.
[0029] The heat dissipation and dehumidification structure of this laser scanning system achieves a triple protection system of sealed cavity, water cooling, and intelligent dehumidification. This system completely blocks dust intrusion and moisture effects through physical sealing and anti-condensation technology. Rigid support and closed-loop temperature and humidity control ensure long-term optical accuracy. On-demand dehumidification and directional heat dissipation reduce energy consumption and extend device life. By deeply coupling environmental humidity / temperature control with the optical system structure, the system solves the reliability problem of high-precision laser equipment in complex environments.
Claims
1. A heat dissipation and dehumidification structure for a laser scanning system, comprising a base plate (1) and a protective cover (2) sealed to the base plate, wherein the base plate (1) and the protective cover (2) form a closed cavity, characterized in that, The cavity is equipped with a laser scanning system, a water-cooling heat dissipation system, and a dehumidification device.
2. The heat dissipation and dehumidification structure of the laser scanning system according to claim 1, characterized in that, The laser scanning system includes a laser, a collimator (3) arranged sequentially along the propagation path of the laser beam, a laser galvanometer (4), and a field lens (5).
3. The heat dissipation and dehumidification structure of the laser scanning system according to claim 2, characterized in that, The base plate (1) has a column (6) on its upper surface. An optical device mounting plate (7) is connected between the two columns (6). The collimator (3) is fixedly connected to one side of the optical device mounting plate (7). The laser galvanometer (4) is fixedly connected to the other side of the optical device mounting plate (7). The field lens (5) is connected to the exit end of the reflected light path of the laser galvanometer (4).
4. The heat dissipation and dehumidification structure of the laser scanning system according to claim 1, characterized in that, The dehumidification device is selected from any one of a semiconductor dehumidifier, a desiccant container, or a condensation dehumidifier.
5. The heat dissipation and dehumidification structure of the laser scanning system according to any one of claims 1-4, characterized in that, It also includes a humidity sensor and a controller. The humidity sensor is located inside the cavity, and the controller adjusts the working state of the dehumidifier according to the humidity sensor signal.
6. The heat dissipation and dehumidification structure of the laser scanning system according to claim 1, characterized in that, The protective cover (2) is made of aluminum alloy and has an anti-condensation coating on its inner surface. The coating surface has a lotus leaf-like micro-nano structure.
7. The heat dissipation and dehumidification structure of the laser scanning system according to claim 1, characterized in that, The water-cooled heat dissipation system actively dissipates heat from the optical device through circulating coolant; the cooling pipes of the water-cooled heat dissipation system are in direct contact with the mounting plate (7) of the optical device or the optical device body.