Engineered to exact global standards (UL, CE, RoHS, ISO 9001:2015) for high performance under extreme thermal loads.
Located in the beautiful coastal city of Xiangshan, Ningbo, Ningbo Taojun Refrigeration Equipment Co., Ltd. originated from the prestigious Xiangshan Refrigeration Accessories Factory of Zhejiang University. For over 30 years, we have transitioned from a specialized laboratory accessory factory to a premier national high-tech enterprise, pioneering the design, development, production, and global distribution of elite refrigeration parts.
Our core product line is engineered for high stability and includes: copper filter driers, check valves, air conditioning service valves, wire-tube and finned condensers, brass and copper connection accessories, and specialized HVAC cable ties.
With an unyielding commitment to technological innovation, our brand "Lingshan" has set benchmarks in domestic and international cooling systems. We operate under stringent certifications: ISO9001:2015 Quality Management System, EU RoHS and REACH Environmental directives, and the US UL certification, ensuring that every batch of parts conforms to global safety norms.
The global heating, ventilation, air conditioning, and refrigeration (HVAC/R) industry is undergoing a structural transition driven by decarbonization, digitalization, and regulatory evolution.
The global phase-down of hydrofluorocarbons (HFCs) under the Kigali Amendment forces systems to migrate to natural or low-GWP alternatives (e.g., R32, R290, CO2, R1234yf). Because natural refrigerants like propane (R290) are flammable, components such as copper filter driers, safety access valves, and fan motors must be spark-free, airtight, and highly corrosion-resistant to prevent system leaks.
To meet stringent seasonal energy efficiency ratios (SEER2 in the US, ErP in Europe), manufacturers are adopting micro-channel condensers and optimized copper capillary tees. These elements maximize heat transfer coefficient while minimizing internal volume, reducing the total refrigerant charge required, and significantly lowering operational carbon footprints.
Air conditioners are transforming from mechanical appliances into dynamic IoT nodes. Variable-speed inverter PCB control boards are critical to optimizing energy usage. By responding dynamically to outdoor ambient temperatures and user profiles, modern frequency inverter controllers ensure stable compressor operations, reducing cyclic wear and energy draw by up to 40%.
Ningbo Taojun integrates smart automation with strategic raw material supply structures to protect global HVAC/R brands against market disruptions.
Recent macroeconomic disruptions have shown that geographical clustering and vertical integration are essential for securing manufacturing pipelines. Situated in Ningbo, a major deepwater port cluster, Taojun gains direct access to primary copper refineries and precision steel suppliers. This spatial advantage reduces raw material lead times and insulates foreign partners from logistic delays.
By leveraging CNC automatic bending machines and high-temperature brazing furnaces imported from Germany, our tolerance variation is kept within ±0.02mm. This high manufacturing precision ensures seamless compatibility for OEM assembly lines globally, eliminating alignment issues during refrigeration component installations.
Industrial performance begins with material purity. Our copper filter driers are designed to absorb systemic moisture, filter micro-debris, and prevent acid buildup.
Designed to protect refrigeration compressors from moisture and solid particulates. A moisture concentration as low as 15 ppm can react with lubricants to generate hydrofluoric acid, degrading motor winding insulation and causing copper plating on bearing surfaces.
Fittings and valves act as the gatekeepers of refrigerant containment. Taojun access valves are engineered to withstand high working pressures (R410A and R32 systems) and prevent micro-leakage at critical joint nodes.
Thermal transfer efficiency defines the efficiency of the cooling loop. Taojun wire-tube condensers undergo high-vacuum internal cleaning processes to eliminate carbon residue, grease, and moisture before seal shipping.
We combine academic collaboration with strict manufacturing controls to deliver reliable components to the world's leading appliance brands.
Our core manufacturing equipment is imported directly from Germany, ensuring precise tooling, automated feeding, and consistency across long production runs.
Our R&D center employs 15 dedicated engineers, including PhDs and professors from the University of Science and Technology of China, pushing the boundaries of thermal-fluid dynamics.
Custom sizes, geometries, and specialized materials are developed in-house. We collaborate closely with engineers from prototype design to full-scale mass production.
Our ITO films (no shrinkage, zero color variance) and liquid crystal spacers are sourced directly from Japan, and our adhesives are imported from leading European suppliers.
Every product batch undergoes 500 hours of damp heat testing, high & low temperature thermal shocks (75°C to -35°C), and 100V high-voltage insulation tests for zero breakdown.
100% recyclable shipping cartons and eco-friendly protective packaging materials to match the green operations of our global HVAC partners.
From micro-scale refrigeration loops in medical freezers to heavy-duty variable refrigerant flow (VRF) setups in commercial buildings.
Refrigeration systems operate under unique environmental pressures. Our components are adapted for high performance in these scenarios:
Thirty-eight years of growth driven by our core pillars: Honesty, Innovation, Responsibility, and Cooperation.
Established as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, laying the foundation for academic collaboration and research-driven product development.
Transitioned to digitized workshop environments. Implemented early-stage ERP systems and upgraded quality assurance workflows to serve domestic appliance brands like Haier and Midea.
Evolving into a smart factory utilizing CCD visual inspection, fully automated robotic brazing lines, and expanded exports across Europe, North America, and Southeast Asia.
A global brand is supported by its corporate culture. We believe our values can only be formed through Impact, Infiltration, and Integration.
Honesty: We adhere to high-integrity management. By prioritizing product quality, honesty forms the source of our group's competitive edge.
Innovation: Innovation is the essence of our culture, guiding our concept, mechanism, technology, and management structures. We stay adaptable to market and regulatory changes.
Responsibility: We maintain a strong sense of responsibility and mission toward our clients, employees, and society, ensuring reliable performance across the product lifecycle.
Cooperation: Working together to create a win-win situation is a key goal. Through collaborative partnerships, we manage resources effectively, allowing our teams to apply their core specialties.
Verifiable compliance with global engineering standards, guaranteeing reliability for OEM and ODM partnerships.
As the premium brand of Ningbo Taojun Refrigeration Equipment Co., Ltd., we maintain ISO certification for the design and production of key refrigeration components.
Our official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) validates our production systems for filter driers, condensers, and access valves. This certification is verifiable through China’s official CNCA portal (www.cnca.gov.cn) and our audit partner Zhongci International (www.zcgirz.com).
Main Certification Document
Detailed Scope of Certification
Answers to common technical and procurement questions regarding HVAC/R components, copper processing, and global logistics.
High-purity phosphorus-deoxidized copper (C12200) consists of at least 99.9% copper. This alloy offers excellent thermal conductivity, corrosion resistance, and ductility for flaring, bending, and brazing. Crucially, C12200 prevents hydrogen embrittlement during high-temperature brazing, ensuring joints remain gas-tight and leak-proof under high operating pressures, such as those found in R410A and R32 air conditioning loops.
Modern HVAC systems require specific desiccants based on the refrigerant and oil type. Standard HFC systems utilizing Polyolester (POE) or Polyalkylene Glycol (PAG) lubricants are highly hygroscopic and require 3A molecular sieves. A pore size of 3Å selectively adsorbs water molecules (size 2.6Å) while excluding larger refrigerant molecules, preventing chemical reactions that can degrade the desiccant matrix.
Our quality assurance protocol includes 100% helium mass spectrometer leak testing. Helium has small atomic dimensions, allowing it to penetrate micro-fissures that standard air-bubble bubble submerge tests might miss. We enforce a strict leak rate threshold of less than 1x10^-7 mbar.l/s, ensuring our components are compatible with natural refrigerants and long-term warranties.
Yes. Our engineering division utilizes multi-axis CNC bending systems to produce complex piping geometries based on custom CAD drawings or physical reference samples. Our collaboration with the University of Science and Technology of China allows us to model flow resistance and optimize tube geometry to prevent pressure drops across the refrigeration line.
Most shipments are processed via the Port of Ningbo, one of the world's largest container shipping hubs, offering direct routes to major global markets. We use double-wall corrugated carton boxes packed on ISPM-15 heat-treated pallets. For sensitive components, like electronic PCB inverter controllers, we use ESD shielding bags, moisture-absorbent packets, and vacuum-sealed poly wraps to prevent oxidization during ocean transit.
Providing thermal loop solutions from raw copper piping to advanced inverter controller boards.
Step inside our manufacturing environments, high-precision laboratories, and assembly stations.
Featuring robotic copper extrusion, precision straightening, and localized processing centers.
Integrating active helium leak testing booths and real-time CCD visual alignment checks.
Dedicated thermal-shock Chambers and pressure cycle verification systems.
The product sales network covers major and medium-sized cities in China and is exported to Europe, America, South America, Southeast Asia, the Middle East, Africa, and other overseas markets. The company's goal is to support and cooperate with every sincere customer to achieve a win-win situation.
Taojun