WO-2026092397-A1 - GAS PURIFICATION METHOD FOR THREE-DIMENSIONAL PRINTING, GAS PURIFICATION APPARATUS, AND 3D PRINTING SYSTEM

WO2026092397A1WO 2026092397 A1WO2026092397 A1WO 2026092397A1WO-2026092397-A1

Abstract

The present application relates to the technical field of three-dimensional (3D) printing, and discloses a gas purification method for three-dimensional printing, a gas purification apparatus, and a 3D printing system. The gas purification method comprises: providing a target space, a printing material for three-dimensional printing being arranged in the target space, so that the target space comprises a target gas derived from the printing material; arranging a photocatalyst in the target space; projecting light of a predetermined wavelength onto the photocatalyst to excite the photocatalyst; inputting oxygen into the target space to increase the concentration of oxygen in the target space; and inputting ozone into the target space and/or generating ozone in the target space. The gas purification apparatus of the present application is intended to solve the problem of air pollution generated in a 3D printing process, and is particularly intended for the efficient purification of harmful gases such as volatile organic compounds (VOCs).

Inventors

XIONG, Rui
ZHONG, Jiongchao
HE, Jianpeng
LIANG, YUHAO
LIN, Jieqi

Assignees

广州黑格智造信息科技有限公司

Dates

Publication Date: 20260507
Application Date: 20251027
Priority Date: 20241030

Claims (20)

A gas purification method for 3D printing, comprising: A target space is provided in which printing material for 3D printing is arranged, such that the target space includes a target gas originating from the printing material; A photocatalyst is arranged in the target space; A predetermined wavelength of light is projected onto the photocatalyst to excite the photocatalyst; Oxygen is introduced into the target space to increase the oxygen concentration therein; and Introduce ozone into the target space and/or generate ozone in the target space.
The gas purification method according to any one of the preceding claims, wherein the target space: Configured to accommodate at least one 3D printing device; or Limited to a single 3D printing device.
The gas purification method according to any one of the preceding claims, wherein the three-dimensional printing equipment includes any one of DLP printing equipment, LCD printing equipment, FDM printing equipment, SLA printing equipment, and inkjet three-dimensional printing equipment.
The gas purification method according to any one of the preceding claims, wherein the photocatalyst comprises at least one of titanium dioxide, zinc oxide, tungsten trioxide, and modified titanium dioxide.
The gas purification method according to any one of the preceding claims, wherein the modified titanium dioxide includes at least one of non-metal-doped titanium dioxide, metal-doped titanium dioxide, noble metal-deposited titanium dioxide, and heterostructured titanium dioxide.
The gas purification method according to any one of the preceding claims, wherein the light of the predetermined wavelength includes visible light and/or ultraviolet light.
The gas purification method according to any one of the preceding claims, wherein... Use a first light source to emit visible light; and/or Ultraviolet light is emitted using a second light source independent of the first light source.
The gas purification method according to any one of the preceding claims, wherein the light of the predetermined wavelength includes at least one wavelength selected from the following ranges: 190nm to 280nm, 281nm to 320nm, and 321nm to 400nm.
The gas purification method according to any one of the preceding claims, wherein the light of the predetermined wavelength includes at least one wavelength selected from the following ranges: 240nm to 260nm, 310nm to 320nm, and 340nm to 360nm.
The gas purification method according to any one of the preceding claims, wherein inputting oxygen into the target space comprises: continuously or intermittently inputting oxygen into the target space at a predetermined flow rate to promote the decomposition of organic compounds in the target gas.
The gas purification method according to any one of the preceding claims, wherein inputting oxygen into the target space comprises: using an oxygen supply device to output oxygen of a predetermined concentration to the target space, wherein the predetermined concentration is 25% to 100%.
The gas purification method according to any one of the preceding claims, wherein inputting oxygen into the target space comprises: inputting oxygen toward the photocatalyst such that the average oxygen concentration in a 0.5 m³ space centered on the photocatalyst is 28% to 70%.
The gas purification method according to any one of the preceding claims, wherein inputting oxygen into the target space comprises: inputting oxygen into the target space such that the average oxygen concentration in a 5 m³ space centered on the photocatalyst is 30% to 50%.
The gas purification method according to any one of the preceding claims, wherein the step of introducing ozone into the target space and/or generating ozone in the target space comprises: Ozone is obtained by using light of the predetermined wavelength to decompose oxygen in the target space; and/or, Ozone is obtained by using an electric current to decompose oxygen in the target space; and/or... Ozone, independent of the target space, is introduced into the target space.
According to any one of the preceding claims, the concentration of oxygen and ozone input into the target space is configured such that the concentration of the target gas and the concentration of ozone in at least a portion of the target space are both 0 to 0.050 mg/ m³ , preferably 0 to 0.005 mg/ m³ .
The gas purification method according to any one of the preceding claims further includes: using a ventilation device to accelerate the flow of gas in the target space.
The gas purification method according to any one of the preceding claims further includes: Detect the concentration of the target gas in the target space; When the detected concentration of the target gas is greater than a first predetermined concentration, light of a predetermined wavelength is projected onto the photocatalyst.
The gas purification method according to any one of the preceding claims further includes: Detect the concentration of the target gas associated with the printing material in the target space; When the concentration of the detected target gas is less than the second predetermined concentration, the projection of light of the predetermined wavelength is stopped, and the input and/or generation of ozone is stopped.
The gas purification method according to any one of the preceding claims further includes: Collect or remove gases that have undergone purification and/or products obtained from the purified gases.
The gas purification method according to any one of the preceding claims further includes: One or more of activated carbon filter cartridges, HEPA filter cartridges, particulate filter cartridges, fiber filter cartridges, and electrostatic filter cartridges are arranged in the target space.

Description

Gas purification methods, gas purification devices, and 3D printing systems for 3D printing This application claims priority to Chinese Patent Application No. 202411538326X, filed on October 30, 2024, entitled "Gas Purification Method and 3D Printing System for 3D Printing," the entire contents of which are incorporated herein by reference; Chinese Patent Application No. 2024226382463, filed on October 30, 2024, entitled "Air Purification Module, 3D Printing Equipment and 3D Printing System," also filed on October 30, 2024, entitled "Air Purification Module, 3D Printing Equipment and 3D Printing System," the entire contents of which are incorporated herein by reference; and Chinese Patent Application No. 2025209808898, filed on May 16, 2025, entitled "Air Purification Device and 3D Printing System," the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of 3D printing technology, specifically to a gas purification method, gas purification device, and 3D printing system for 3D printing. Background Technology 3D printing is a rapid prototyping manufacturing technology that transforms digital models of materials such as resin, plastic, and metal into physical models by building objects layer by layer. 3D printing processes include: Stereolithography (SLA), which uses photosensitive resin as the material and employs a UV laser to scan the liquid resin to solidify it layer by layer; Digital Light Processing (DLP), where a light source irradiates liquid photosensitive resin in a patterned manner to solidify it layer by layer; Selective Laser Sintering (SLS), which uses powdered metal as the material and uses a laser under computer control to scan and irradiate the powder to achieve sintering; and Fused Deposition Modeling (FDM), which heats and melts a filament of thermoplastic material, extrudes the material through a nozzle, and the molten filament adheres to the previous layer to form a solid model. For 3D printing equipment that uses photosensitive resins or hot-melt plastics as printing materials, these materials inevitably release volatile gases during placement or printing. These gases may contain various components such as hydrocarbons, halogenated hydrocarbons, aldehydes and ketones, esters, alcohols, and amides, collectively known as volatile organic compounds (VOCs). Because VOCs have diverse properties and some components are toxic, they may pollute the printing environment and pose potential health hazards to operators. With the increasing popularity of 3D printing technology, air pollution caused by printing materials (e.g., in the printing area and inside the printer) is becoming increasingly prominent. Current 3D printing equipment on the market uses activated carbon filters or negative pressure ventilation to exhaust gases generated during the printing process. However, activated carbon filters become saturated and ineffective after a period of time, requiring frequent replacement to maintain purification efficiency. For enclosed spaces, using negative pressure ventilation to exhaust gases from inside the printing equipment (e.g., in manufacturing rooms) still poses health threats to operators. Therefore, there is a need to explore an efficient and sustainable air purification solution to reduce or eliminate health risks (e.g., respiratory, allergic, carcinogenic) for users operating printing equipment. Technical issues To address the issues of low air purification efficiency and poor sustainability in the current 3D printing industry, this application provides a gas purification method, gas purification device, and 3D printing system for 3D printing, aiming to solve these problems. Technical solutions The first aspect of this application provides a gas purification method for 3D printing, comprising: providing a target space in which printing material for 3D printing is disposed, such that the target space includes a target gas originating from the printing material; disposing a photocatalyst in the target space; projecting light of a predetermined wavelength onto the photocatalyst to excite the photocatalyst; introducing oxygen into the target space to increase the oxygen concentration in the target space; and introducing ozone into the target space and/or generating ozone in the target space. This application proposes a gas purification method based on the catalytic oxidation principle of photocatalysts, aiming to solve the air pollution problem generated during 3D printing, particularly for the efficient purification of harmful gases such as VOCs (volatile organic compounds). This method accelerates the decomposition of VOCs under light and catalyst conditions by injecting oxygen into the target space inside or around the 3D printing equipment, and by injecting ozone to promote the oxidation of the small molecule products obtained from the decomposition, converting them into harmless substances such as water and carbon dioxide.