In modern HVAC/R systems, the filter on dryer (alternatively known as the copper filter drier) is no longer treated as a simple commodity consumable. It has evolved into a key element of environmental safety, thermodynamic optimization, and system durability. As refrigeration technology undergoes rapid transformation, manufacturing standards must keep pace.
Global procurement teams are shifting focus from simple unit costs to Information Gain and technical verification. Modern purchasing demands proof of compatibility with synthetic polyester oils (POE) and polyvinylether oils (PVE), which are far more hygroscopic than older mineral oils. This makes the desiccant quality in filter driers the primary line of defense in refrigeration integrity.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a historic manufacturing hub in Zhejiang. Founded in 1988, our predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the course of three decades, our company has integrated design, engineering, advanced manufacturing, and technical support into a streamlined operational model.
In 2021, Taojun was recognized as a national High-Tech Enterprise. Our signature product lines—including copper filter driers, check valves, air conditioning valves, and condensers—are designed and certified under strict international guidelines. Our domestic brand "Lingshan" and our global brand "Taojun" have established a footprint in key manufacturing corridors worldwide.
We work with global home appliance leaders such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui, helping them achieve efficiency and system reliability.
Taojun specializes in manufacturing high-performance refrigeration parts designed to absorb moisture and acid while filtering out particulate impurities. Designed as both OEM components and aftermarket replacement parts, they support domestic, commercial, and automotive applications.
Our filter shells are made of high-purity, rust-resistant, and high-pressure copper pipes, ensuring leak-proof operations under heavy load.
Equipped with a premium 3A molecular sieve showing high water adsorption (≥20%) combined with an activated carbon layer for acid neutralization.
Sealed using argon arc welding, which prevents leakage path formation and protects internal desiccants from pre-exposure and saturation.
By using smart factory technologies, Taojun has modernized traditional production lines to meet the strict supply demands of global partners. Our factory in Zhejiang is designed to guarantee quality at scale through specific controls:
WorkShop
Product Line
R&D Testing Lab
Established as Xiangshan Refrigeration Accessories Factory, built upon academic R&D from Zhejiang University.
Constructed dedicated factory facilities to handle the growing demand for local home appliance components.
Implemented MES intelligent workshop management system, transitioning the facility toward high-efficiency production.
Expanded global OEM operations with automated assembly cells, helping global HVAC clients transition to green refrigerants.
R&D Capacity: Our engineering center employs 15 dedicated researchers, including doctors and engineering professors from the University of Science and Technology of China (USTC). This academic foundation enables us to develop solutions for complex refrigeration challenges.
Material Selection: We import core films and temperature-resistant protective coatings directly from verified partners in Japan and Europe to guarantee stable operations. Our materials are tested to withstand thermal ranges from -35°C to 75°C without cracking, peeling, or loss of desiccant integrity.
Corporate Core Values:
Refrigeration setups face different environmental loads depending on their application. Taojun's components are optimized to meet the demands of four primary sectors:
Protects capillary tubes in domestic refrigerators against moisture freeze-ups and blockage, maintaining optimal compressor operation.
Designed to withstand continuous runtime and thermal cycles, protecting larger food storage refrigeration systems from acid damage.
Resistant to mechanical vibration and road bumps, providing reliable filtration for car air conditioners under high pressures.
Perfect fit for repair, maintenance, and upgrade of older commercial buildings using modern replacement refrigerants.
Taojun Refrigeration maintains verified manufacturing credentials, giving our partners confidence in our product quality and compliance standards.
We hold compliance certifications for different regions: EU RoHS for environmental protection, US UL Certification for safety, along with IATF 16949, REACH, and WEEE compliance. Verified via China's CNCA database (www.cnca.gov.cn) and Zhongci International (www.zcgirz.com).
Main ISO Certification Document
Detailed Scope of Certification
Taojun
