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In modern thermodynamic design, the performance of heat exchangers and refrigerant fluid conduits depends heavily on the metallurgical purity and mechanical tolerances of Copper LWC (Level Wound Coil). As refrigeration architectures evolve to support eco-friendly alternatives (such as low-GWP HFCs, HFOs, and natural refrigerants like R290 or CO2), requirements for interior cleanliness, grain structure uniformity, and pressure resilience have reached unprecedented levels.
Copper Level Wound Coils (LWC) act as the vital bloodstream of modern HVAC units, condensers, and evaporator assemblies. As a global leading manufacturer, Ningbo Taojun Refrigeration Equipment Co., Ltd. produces premium-grade copper solutions designed to prevent pressure drops, eliminate chemical compatibility risks, and optimize thermal conductivity.
"Information Gain" Insight: Cleanliness of the inner surface in copper LWC is critical to preventing compressor failure. Our specialized manufacturing lines reduce residual hydrocarbon contamination to less than 0.020 g/m², ensuring system reliability under high temperature and variable pressure cycles.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a historic coastal industrial center. Founded in 1988, our predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. This technical foundation allows us to maintain direct research ties with some of the country’s leading engineering minds, driving continuous breakthroughs in refrigeration component design.
Over more than 30 years of development, we have transformed into a comprehensive enterprise integrating design, R&D, advanced manufacturing, global sales, and after-sales service. In 2021, Taojun was recognized as a National High-Tech Enterprise. Our product portfolio includes: filter driers, check valves, air conditioning valves, condensers, brass and copper fittings, air conditioner cable ties, and comprehensive refrigeration accessories.
Today, our "Lingshan" brand filter driers represent a domestic standard of reliability, backed by ISO9001:2015, EU RoHS, REACH, and US UL certifications. We are a key supply chain partner for domestic and international appliance leaders, including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Specialized refrigeration parts for domestic and commercial HVAC applications designed for maximum durability.
TAOJUN copper filter driers are designed to absorb moisture and acid while filtering out minute physical impurities from the refrigeration loop. Typically installed as original components or critical repair parts, they protect high-value compressors in domestic refrigerators, freezers, and industrial HVAC systems.
Transitioning toward low-GWP green refrigerants and smart HVAC monitoring integrations.
Adapting copper LWC dimensions and wall structural properties to tolerate higher pressure profiles required by next-generation refrigerants, including R32, R290, and transcritical CO2 systems.
Implementing precision internal ribbing/micro-groove geometry within Level Wound Coils, enhancing convective heat transfer coefficients by up to 140% compared to traditional smooth-bore copper tubes.
Collaborating with university labs to develop "smart" copper drier cartridges embedded with miniaturized humidity and acid colorimetric sensors to alert predictive maintenance networks.
Maximizing product reliability through automated manufacturing execution systems (MES) and rigorous process controls.
Ningbo Taojun's manufacturing facility uses an advanced MES Intelligent Workshop Management System to monitor quality at every station. Raw material coil characteristics, tube bending parameters, desiccant volume, and leak testing outcomes are digitally logged under a traceable database.
To achieve high reliability, our production relies on specialized equipment:
Advanced Automated Workshop
Continuous Extrusion Line
Providing specialized refrigeration component sets for global commercial and domestic systems.
Delivering high-volume copper components (capillary tube assemblies, filter driers, and return bends) that match the high-efficiency standards of household refrigerators and freezers.
Providing heavy-duty, multi-core liquid line filter driers, receiver tanks, and accumulator manifolds capable of enduring high vibration and pressure in supermarket systems and refrigerated transit.
Supplying specialized moisture-absorption components designed for integration into tight automotive engine compartments, compatible with new R1234yf cooling designs.
Rigorous materials testing and international certifications verified by leading audit groups.
Ningbo Taojun Refrigeration operates under the officially audited GB/T19001-2016 / ISO9001:2015 Standard (Registration No.: 41325Q00065R0S). This guarantees consistent engineering control from initial alloy sourcing through final pressure testing.
Additionally, we hold certifications including US UL, EU RoHS, and REACH compliance directives, validating our components for use in ecologically regulated markets like North America and the EU.
ISO 9001:2015 Cert
Scope of Verification
UL Certification
RoHS & REACH Compliance
Our journey of technical innovation and our core principles of partnership.
Founded as Xiangshan Refrigeration Accessories Factory of Zhejiang University, establishing our technical foundations.
Completed expansion of our primary copper processing workshops to scale production capacity.
Integrated digital workshop management frameworks and implemented initial MES process systems.
Established the "Taojun" refrigeration brand and expanded direct export reach to the EU and Americas.
Recognized as a National High-Tech Enterprise, acknowledging our investments in research and process automation.
Scaled automated helium leak detection and continuous casting systems, achieving a 0.05% quality defect rate target.
We believe that robust corporate culture is developed through Impact, Infiltration, and Integration. Our group values shape our daily operations and long-term goals:
Providing specialized manufacturing capabilities, regulatory support, and responsive engineering services.
Over 35 years of engineering experience supported by ongoing collaborations with research universities.
Operates under audited ISO 9001 and IATF 16949 control systems to maintain a 0.05% quality defect rate target.
Active supply networks covering 50+ countries with established OEM logistics serving Haier, Midea, and Whirlpool.
Accommodating custom ODM/OEM designs with small starting runs (500-unit MOQ) and efficient prototyping cycles.
100% compliant with EU RoHS and REACH standards using clean materials and recyclable packaging designs.
All parts undergo MES-monitored helium leak checks and optical CCD inspections to prevent field defects.
Common engineering and logistical inquiries from global procurement partners.
A: Copper LWC (Level Wound Coil) allows for continuous, high-speed automated feeding into CNC hairpin bending machines. This minimizes material waste and scrap rates, improves wall thickness consistency, and minimizes brazing points, which lowers potential leak risks across the heat exchanger assembly.
A: We utilize closed-loop, multi-stage ultrasonic cleaning and high-temperature vacuum drying systems. Our quality control testing tracks residual contaminants to ensure total inner surface residues remain below 0.020 g/m², preventing chemical degradation of modern synthetic and natural refrigerants.
A: Yes, we provide custom desiccant configurations. We offer standard 3A molecular sieves for high water adsorption, as well as blends containing activated carbon to neutralize acids in systems prone to electrical burnout or chemical breakdown.
A: Every production batch is logged under our MES system. Raw material mill certifications, heat numbers, forming parameters, automated helium vacuum leak rates, and batch stampings are fully traceable for every shipment.
Complete your supply chain with our range of high-efficiency fittings, adapters, and tools.
Taojun