The global heating, ventilation, air conditioning, and refrigeration (HVAC&R) industry is undergoing a structural transition driven by decarbonization, strict environmental protocols (such as the EU F-Gas Regulation and the Kigali Amendment), and the adoption of low-GWP (Global Warming Potential) refrigerants like R32, R290 (Propane), and HFO blends. Within this ecosystem, the air conditioning filter drier remains a critical component required to safeguard system efficiency and longevity.
As a core component in both residential and industrial cooling loops, the primary function of the filter drier is the extraction of moisture, acids, and solid particulate matter. Moisture ingress is particularly hazardous; it leads to the hydrolysis of POE (Polyolester) lubricants, generating harmful organic acids that trigger compressor winding failures and system corrosion. Consequently, global HVAC OEMs demand highly customized, zero-leakage, and thermodynamically optimized filter driers.
Modern filter drier manufacturing requires highly controlled thermodynamic environments. Chemical drying techniques must prevent desiccant attrition while ensuring minimal pressure drops across the core matrix. Taojun group addresses these requirements with targeted R&D partnerships alongside key institutions like the University of Science and Technology of China.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a historic and coastal industrial hub. Founded in 1988, our operational predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over 30 years of development has positioned Taojun as an integrated powerhouse for high-precision refrigeration accessories.
Our comprehensive production facility specializes in: filter driers, check valves, air conditioning split service valves, condensers, brass and copper accessories, and specialized HVAC piping. Awarded the designation of National High-Tech Enterprise in 2021, the company continues to pioneer core processing techniques, quality-control protocols, and automated manufacturing systems.
Under our proprietary domestic brand "Lingshan", our components are recognized for engineering reliability. For global markets, Taojun operates as a major supplier of OEM and ODM components, partnering with international appliance manufacturers including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Each copper filter drier is constructed from high-purity, seamless copper pipe. This provides excellent corrosion resistance and elevated burst pressure ratings. Mechanical jointing uses precise automated machining to prevent internal stress concentration and micro-cracking.
Equipped with premium 3A Molecular Sieve desiccant beads combined with an optional activated carbon layer. The 3A molecular pore structure selectively adsorbs water molecules while excluding refrigerant and lubricant compounds, preventing chemical decomposition.
We utilize precision automated welding and inert gas protection (Argon Arc) to eliminate oxidation during assembly. This ensures clean internal surfaces and prevents contamination from slag, meeting strict clean-room requirements.
From raw materials testing to high-pressure validation, our engineering process focuses on performance and reliability.
We import specialized ITO films and high-temperature resistant protective films directly from Japan, alongside European grade sealing adhesives to maintain material integrity under extreme thermal cycles.
Our Manufacturing Execution System (MES) tracks production batches from raw copper extrusion to final pressure testing, enabling traceability for industrial and residential components.
Components undergo 500-hour environmental endurance chamber testing between -35°C and 75°C, alongside rapid thermal shock testing from 10°C to 90°C to simulate harsh field environments.
Each completed assembly undergoes helium mass spectrometer leak detection and 100V high-voltage breakdown analysis to ensure reliable containment of modern refrigerants.
Our commitment to technical precision includes:
Taojun refrigeration components are designed to meet the demands of various operating environments.
Designed for split and window-type HVAC systems, these filter driers prevent capillary blockages and system failures in residential settings. Optimized flow geometry ensures quiet operation and minimizes refrigerant noise.
Engineered for high duty cycles in display cabinets and cold storage units. These heavy-duty molecular sieve cores handle high moisture capacities during frequent system defrosted cycles.
Built to withstand vibration and thermal cycling in vehicle air conditioning loops. Manufactured under IATF 16949 processes to ensure mechanical reliability under high vibration conditions.
Taojun Refrigeration operates a quality management system certified to GB/T19001-2016 / ISO9001:2015 (Registration No.: 41325Q00065R0S). This framework governs our manufacturing processes, including incoming raw materials inspection and helium leak validation.
Main Certification Document
Detailed Scope of Certification
Our certification status can be verified online through the Certification and Accreditation Administration of China (CNCA) website (www.cnca.gov.cn) or via the registrar Partner, Zhongci International (www.zcgirz.com). We also comply with CE, EU RoHS, and UL requirements for international markets.
Taojun