Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Integrating academic expertise with industrial force, we have specialized in refrigeration component design and thermal cycle manufacturing for over 38 years.
Today, Taojun is recognized as a National High-Tech Enterprise (awarded in 2021). We operate a highly modernized factory utilizing state-of-the-art machinery imported from Germany, and we maintain an elite R&D center staffed by 15 specialist engineers, including doctors and professors from the renowned University of Science and Technology of China (USTC). Our core commitment is to design, construct, and deliver high-precision thermal components—primarily copper-coated double-walled steel Bundy tubes, filtration units, check valves, and condensers—that exceed global efficiency and environmental standards.
To ensure high durability, all raw material selections conform to stringent parameters: our ITO films are sourced from high-specification Japanese suppliers (featuring no shrinkage and zero color difference), our liquid crystal spacers deliver superior structural uniformity, and specialized high-performance adhesives are directly imported from premium European manufacturers.
Our production floor integrates automated high-frequency induction brazing systems, MES (Manufacturing Execution System) workshop tracking, and automated CCD camera inspection loops. Watch our manufacturing process for copper filter driers, condenser coils, and Bundy tube configurations to see why industry leaders like Haier, Gree, Midea, Whirlpool, and Electrolux trust Taojun for high-volume component supply.
Copper Bundy tubes (double-walled, low-carbon steel tubing wrapped 720 degrees and copper-brazed) are the backbone of modern heat exchange systems. In an era prioritizing high efficiency and lower carbon footprints, refrigeration systems require components that withstand high working pressures and have excellent thermal conductivity.
With international treaties like the Kigali Amendment pushing the HVAC industry toward high-efficiency natural refrigerants (such as R290 propane and CO₂), operating pressures are increasing. Our copper Bundy tubes and specialized filter driers are engineered to handle high burst pressure limits and prevent refrigerant leakage.
Beyond refrigeration, double-walled copper-plated Bundy tubes are widely utilized in automotive brake lines and EV thermal management loops. Taojun provides customized bending, structural shaping, and chemical surface protection to meet these demanding applications.
Our sales footprint spans across major industrial clusters in Europe, North America, South America, Southeast Asia, the Middle East, and Africa. We offer flexible manufacturing with low MOQs and fast shipping protocols to support just-in-time production lines globally.
Bundy tubes are manufactured by roll-forming a double-copper coated steel strip (low carbon grade) into a double-wrapped tube, then furnace brazing it in a reducing atmosphere. This process diffuses copper into the steel substrate, creating a strong metallurgical bond that resists vibration, pressure peaks, and mechanical fatigue.
We employ advanced manufacturing technologies and testing methodologies to deliver reliable components for demanding refrigeration systems.
Our components undergo 30-minute thermal shock tests between 10°C and 90°C to verify structural integrity under cyclic thermal expansion and contraction.
We test components continuously at 75°C and -35°C for 500 hours to ensure long-term performance under demanding operating conditions.
We perform 500-hour damp heat exposures to test the corrosion resistance of our external surfaces and specialized coating layers.
We conduct electrical isolation and high-voltage breakdown tests (up to 100V) on relevant electronics, fan motors, and capacitors to verify safe field operation.
Established as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. This partnership laid the groundwork for our ongoing R&D and materials science development.
We implemented our MES (Manufacturing Execution System) intelligent workshop management, improving batch traceability and production consistency.
Our facility expanded international export lines, introducing automated machinery to support major OEM brand requirements worldwide.
Operating under the verified registration GB/T19001-2016 / ISO9001:2015 (Registration No: 41325Q00065R0S), we maintain quality control at every stage of production. From design validation to incoming inspection of Japanese-made liquid crystal spacers and European structural glues, our processes ensure reliable outcomes.
Main Certificate Document
Detailed Scope of Certification
Our products are integrated into dynamic and complex thermal management systems across various sectors:
Our organizational focus centers on four core values: Honesty, Innovation, Responsibility, and Cooperation.
By prioritizing long-term partnerships over short-term returns, we align our product quality with customer goals, fostering win-win scenarios. This approach has helped us build reliable supply networks with major brands like Haier, Gree, Midea, Whirlpool, Electrolux, and Huarui.
Our engineers consistently refine production tolerances, improve leak-testing protocols, and optimize molecular sieve formulations to enhance overall system efficiency.
National High-Tech Enterprise Recognition & Quality Management Standards
Developing Bundy tube internal surface profiles specifically suited for R290 (propane) and CO₂ cycles, optimizing lubricant oil return rates and minimizing total refrigerant volume requirements.
Transitioning from traditional plating finishes to next-generation bio-sourced epoxy and hybrid multi-layer coatings, which extend service life to 15+ years in harsh industrial or coastal settings.
Deploying advanced laser and ultrasonic detection equipment along the tube drawing line to identify internal and structural defects in real-time, working toward a zero-defect manufacturing target.
High-grade copper casing with active filtration media for ice makers.
Request Quotation →
Heavy-duty particulate filtration cartridge for high-volume ice production.
Request Quotation →
High-purity copper fittings manufactured for optimal brazing compatibility.
Request Quotation →
Premium refrigerant charging and safety line configurations.
We supply a wide range of hot-selling components to international markets:
Our sales network covers major industrial hubs throughout China, and our products are exported to Europe, the Americas, South America, Southeast Asia, the Middle East, Africa, and other international markets. We work closely with our partners to support reliable, long-term supply chains.
Taojun
