Weidun is a brand of Shenzhen Tianlong Environmental Protection Technology Co., Ltd., specializing in commercial kitchen oil smoke purification. With innovation and quality at our core, we provide oil smoke purification solutions for commercial kitchens. The Zhiyun Series features IoT cloud-based monitoring with remote diagnostics, oil smoke detection, data analysis and smart alerts. The Zhijie Series uses modular stacking with 1.0mm carbon steel housing and outdoor powder coating for durability. The integrated exhaust hood combines purifier, hood, duct and fan in one unit. Our coffee roasting smoke purifier effectively treats emissions from coffee roasting. Weidun products feature stable operation and practical design for restaurants, canteens, hotels and other commercial kitchens.
Weidun is headquartered in Longhua District, Shenzhen, with a production base of about 10,000 sqm in Xinxu Town, Huizhou. The company began oil smoke purification work in 2015, was formally established in 2016, and launched the Weidun brand in 2021.
Weidun, a brand of Shenzhen Tianlong Environmental Protection Technology Co., Ltd., has long been dedicated to commercial kitchen oil smoke purification. We believe real environmental protection goes beyond meeting standards — it means purifying every wisp of smoke with care. From the IoT online monitoring of the Zhiyun Series to the modular flexibility of the Zhijie Series, Weidun stays committed to independent R&D and precision manufacturing, blending innovation with craftsmanship into every unit and bringing clean air back to the kitchen.
Weidun operates its own factory with complete environmental production equipment, covering high-power laser cutting, automatic bending, full laser welding and in-house spray painting to deliver end-to-end manufacturing from sheet metal to finished units.
View full certifications & test reports：Certifications
From 2015 to 2025, Tianlong has grown steadily, witnessing the continuous evolution of its brands and products.
Engaged in oil smoke purification from the very beginning
Established an office and obtained the product environmental certification in the same year
Obtained ISO system certification and CE certification, plus multiple patented technologies
The “Tianlong” brand and Huizhou factory were established with supporting equipment upgraded
Launched the Zhiyun and Zhijie series, enriching the product line and upgrading reports to a composite format
Obtained corporate credit and environmental production certificates
The Weidun brand was officially founded and Tianlong moved into its new headquarters
Upgraded the power supply and launched a more stable electronic control system; developed the integrated hood and oil mist purifier
Completed annual system and product certification audits; registered the “Tianlong” trademark; upgraded the Zhiyun and Zhijie series
Completed annual product certification audits, improved after-sales service and obtained third-party test reports for products
Added commercial kitchen air conditioning and coffee roasting product lines
Weidun focuses on oil smoke purification under Shenzhen Tianlong Environmental Protection Technology Co., Ltd. We are expanding and invite talented professionals to join us. We offer competitive compensation, comprehensive benefits and value talent development. Join us in building a greener future!
People-oriented reflects respect, recognition and care for every employee.
Creating value means driving sustainable development through helping employees realize their potential.
Employees are the driving force of development; sharing success is our guiding principle.
Mutual benefit is fundamental; employee growth determines company growth, and employee capability is our core strength.
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