Explore our premium grade refrigeration parts, manufactured directly in our Ningbo facility to meet strict UL and RoHS standards.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in the scenic and industrially robust tourist city of Xiangshan, Ningbo, China. The predecessor of our enterprise was the esteemed Xiangshan Refrigeration Accessories Factory of Zhejiang University. This foundational integration of university-backed engineering R&D and high-precision manufacturing sets us apart in the global thermodynamic component industry.
For more than 35 years, Taojun has engaged in rapid, continuous development, scaling to become a modern, comprehensive national high-tech enterprise (certified in 2021) that integrates the design, development, high-volume production, global marketing, and post-sales technical validation of premium refrigeration accessories.
Our core portfolio encompasses advanced copper filter driers, check valves, air conditioning stop valves, refrigeration condensers, high-purity brass and copper fittings, and heavy-duty cabling systems. Managed through state-of-the-art corporate frameworks, we serve as the OEM/ODM partner of choice for household names including Gree, Midea, Haier, Xinfei, Whirlpool, Electrolux, and Huarui.
Through our automated production, Taojun integrates German-imported core manufacturing systems and robotic lines. This ensures zero human error during critical copper pipe drawing, double-sided chamfering, and desiccant packing processes. Our video showcases the real-time efficiency of our automated copper drier fabrication.
“By combining MES intelligent systems with robotic arm assembly, Taojun maintains an ultra-low defect rate of under 0.05% across millions of units shipped globally annually.”
Engineering hermetically-sealed absorption components designed to optimize refrigerant purity and extend compressor lifetime.
Equipped with pure 3A molecular sieves (water adsorption capability ≥ 20%) alongside an activated carbon layer to entrap free moisture molecules and eliminate harmful organic acids created by oil degradation.
We implement professional-grade orbital argon arc welding methods to encapsulate our high-purity copper shells, guaranteeing complete structural integrity against thermal cycling and high-pressure surges.
By filtering out dust, copper swarf, slag, and internal system debris down to microscopic levels, Taojun copper driers protect the compressor cylinder, valves, and capillary tubes from abrasive failure.
Shell Material: High-grade, TP2 deoxidized copper tubes (copper content ≥ 99.9%), exhibiting exceptional heat transfer, tensile resilience, and corrosion-resistance in aggressive coastal or high-humidity regions.
Desiccant Blend: Specially formulated 3A molecular sieve beads (Zeolite) that select water molecules while rejecting refrigerants (such as R134a, R410a, R600a, R290, R32). Prevent capillary blockage resulting from hydrate precipitation.
Structural Reliability: Engineered to withstand bursting pressures exceeding 5x nominal working pressure, making them suitable for subcritical and supercritical heat pump/HVAC systems alike.
Integration Ease: Extended solid ends allow quick, safe brazing without desiccant deterioration. Perfect for automated production lines of refrigerators, vending machines, and mini-split indoor evaporators.
Years of Thermodynamic Manufacturing Expertise
Maximum Factory Defect Tolerance Rate
Thermal Damp Heat Chambers Testing Period
Countries and Regions Globally Exported To
A comprehensive overview of our manufacturing prowess, quality standards, and materials compliance.
Our core production equipment is imported directly from Germany, enabling high precision during forming, pressing, and automated hermetic welding.
We employ 15 research engineers in our R&D center, partnering with professors and doctors from the University of Science and Technology of China and Zhejiang University.
Critical materials (like liquid crystal spacers with high uniformity) are sourced from Japan, and specialized resins are imported from Europe to ensure high thermal resilience of related components up to 90°C.
Our MES (Manufacturing Execution System) monitors every batch. Together with CCD visual checks and helium leak testing, we guarantee structural safety.
The global cooling and heating industry is undergoing rapid changes due to environmental policies like the Kigali Amendment. The transition toward low-GWP (Global Warming Potential) refrigerants like Propane (R290) and Difluoromethane (R32) demands high thermodynamic stability and minimal oil moisture levels within the compressor casing.
At Taojun, our roadmap focuses on Smart Driers featuring built-in micro-humidity sensors to detect moisture levels in real time. We are also optimizing dry filtration systems for ultra-low charge R290 residential air conditioners to maintain safe operation and high system performance.
Our production facilities in Ningbo, Zhejiang, benefit from China's premier industrial refrigeration cluster. With raw copper mills, brass foundries, and packaging suppliers all located within a 50-kilometer radius, Taojun operates with high efficiency and raw material stability.
Our proximity to the Port of Ningbo (the world's largest port by cargo throughput) allows us to offer short container shipping times, fast customs clearances, and economical bulk shipping rates to North America, South America, Europe, Southeast Asia, and the Middle East.
Custom designs engineered for diverse commercial, industrial, and residential cooling systems.
OEM/ODM Customization: We offer custom sizes, wall thicknesses, molecular sieve weights (ranging from 5g to over 100g), and outlet geometries tailored to your exact piping layout.
Comprehensive Pre-Sales & After-Sales Services: Our engineers provide 24/7 technical consulting, installation guidance, and troubleshooting support. All items are backed by our 1-year product warranty and lifetime engineering support.
We maintain strict ISO 9001:2015, RoHS, REACH, and UL compliance across our entire production range.
Tracing our evolution from a specialized university workshop to a global thermodynamic component manufacturer.
Initial factory building expansions under Xiangshan Refrigeration accessories guidelines.
Implementation of MES intelligent workshop management and digital inventory control systems.
Global logistics expansion, smart desiccant drier integration, and smart manufacturing setups.
Honesty: We prioritize people-centric, integrity-driven operations, premium product quality, and a strong corporate reputation. Honesty is the foundation of Taojun's competitive edge.
Innovation: Innovation drives our group's development. Our teams continuously innovate in concept, mechanisms, technology, and management.
Responsibility: We maintain a strong sense of responsibility toward our clients, our communities, and the environment, driving our group's ongoing growth.
Cooperation: We work closely with partners to build win-win relationships. Through integrity and collaboration, we optimize resources and leverage professional expertise.
Key answers to guide HVAC/R procurement specialists and refrigeration design engineers.
3A molecular sieves have a pore opening of approximately 3 Angstroms. This allows them to selectively adsorb water molecules (2.8 Å) while excluding larger molecules like refrigerants (such as R134a, R290, or R410a). This prevents refrigerant decomposition and ensures high moisture absorption capacity without affecting system performance.
Higher pressure refrigerants like R410A and subcritical CO2 require increased wall thickness for copper shells (typically ≥ 0.8mm to 1.2mm) to safely withstand higher operating pressures. Our TP2 deoxidized copper tubes are engineered to support maximum allowable working pressures (MWP) of up to 45 bar (650 psi) with a safety factor of 5x.
All molecular sieve desiccants are heat-activated and packed in a humidity-controlled cleanroom. Following assembly, copper filter driers undergo dry-nitrogen purging and vacuum-sealed baking. The ends are then immediately sealed with airtight elastomer plugs to prevent moisture absorption before installation.
Yes. We support custom inlet/outlet OD configurations ranging from capillary tube insertions (e.g., 2.0mm to 3.0mm) to standard fractional solder connections (1/4", 3/8", 1/2", 5/8"). All connections are processed with high-precision chamfering for smooth insertion and reliable brazing.
Explore our additional high-precision fittings, service valves, and filtering solutions engineered for high performance.
Taojun