Engineered to comply with ISO 9001 and IATF 16949 standards, our parts deliver ultimate stability under heavy load conditions.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is situated in Xiangshan, Ningbo, a prominent manufacturing and deep-water port hub in Zhejiang Province. Our legacy traces back to 1988, emerging as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over three decades, we have progressed from a specialized engineering workshop into a highly integrated manufacturer of key HVAC components.
As an officially recognized high-tech enterprise, Taojun commands a large factory footprint optimized for automated assembly. We design, prototype, manufacture, and distribute leading lines of filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, and tie wraps. Under our prominent brand names, "Lingshan" and "Taojun," we deliver reliability to globally recognized OEM appliance brands.
Our business philosophy focuses on precision quality and environmental stewardship. The factory works with ISO 9001:2015, IATF 16949 quality controls, and holds EU ROHS, REACH, and US UL listings to serve demanding markets across Europe, the Americas, Asia, and Africa.
Analyzing internal dynamics, materials science, and functional integrity in hermetic compressor systems.
The primary failure mode of HVAC and refrigeration circuits is the combination of moisture and modern synthetic oils (POE/PVE), which creates hydrofluoric and organic acids. Taojun filter driers utilize a premium 3A molecular sieve desiccant core.
Operating with a pore opening size of 3 Angstroms, this zeolite formulation selectively adsorbs water molecules while excluding refrigerant molecules like R134a, R290, R600a, R410A, and R32. Our desiccant provides water absorption capabilities ≥20% of its dry weight, protecting systems against capillary freeze-up and chemical degradation.
Using C12200 deoxidized high-phosphorus copper, Taojun filter shells are constructed to endure extreme high-pressure profiles found in modern R410A and R32 air conditioning configurations.
The material's native ductility prevents physical stress fractures caused by system thermal cycling. The housing ends are formed using precision spinning processes, yielding consistent wall thickness. Standard joint paths employ automated argon-arc welding to ensure gas-tight seals.
To prevent particulate migration from damaging capillary tubes and expansion valves, our driers employ a multi-stage filtering design:
Ningbo Taojun operates a smart manufacturing ecosystem optimized for consistency, scale, and tracing integrity. By utilizing integrated Manufacturing Execution Systems (MES) since 2008, we ensure that every batch of raw copper tubing, 3A molecular sieve, and end connector is tracked throughout the production cycle.
Advanced German Machinery: Our production line integrates imported automated forming and welding machinery. This preserves precise mechanical dimensions (profile tolerances within ±0.02 mm) and avoids heat-affected zone issues commonly seen in manual copper brazing.
End-to-End Quality Checks: We operate a comprehensive quality control framework that includes CCD visual inspection, high/low temperature cycles, and automated helium mass spectrometer leak testing. Drier products undergo high-voltage pressure integrity sweeps to ensure a defect-free profile.
From residential comfort systems to complex industrial cold chains, Taojun components support critical operations.
Domestic refrigerators utilize narrow capillary assemblies that are sensitive to small ice crystals or particulate blockages. Our copper filter driers are designed with strict particulate controls and desiccant capacity, helping domestic appliance brands extend compressor operating lifespans.
Supermarket display units, cold storage rooms, and food processing lines face continuous operation stresses. We supply double-run, large-capacity copper filter driers, high-performance condensers, and custom valves designed to resist acid buildup and system vibration under high mass flow.
Mobile AC systems face constant vibration, structural motion, and high temperature fluctuations. Taojun manufactures custom aluminum and copper receiver-driers designed to meet critical weight limits and vibration standards, ensuring durable operation in modern transport cooling.
A journey of innovation, strategic growth, and shared values.
1998
Establishment of our main production facility, focusing on local OEM supplies.
2008
Integration of MES smart workshop and automated tracing protocols.
2024 & Beyond
Transitioning toward smart components designed for eco-friendly systems.
At Taojun, we believe that brand development is built on clear values. Our engineering team, supported by researchers and advisors from the University of Science and Technology of China, works to turn innovative ideas into practical products. We focus on responsible engineering, ensuring that our products and processes align with environmental guidelines.
Adapting to global environmental challenges and regulatory updates.
The global phase-down of HFCs requires transition to natural alternatives (hydrocarbons like R290, R600a, and R744/CO2). Our R&D team has developed filter configurations designed to withstand the higher operating pressures of subcritical and transcritical CO2 systems (above 120 bar) while maintaining a compact physical footprint.
We are researching integration of inline moisture sensors within commercial filter housings. These smart components are designed to detect moisture levels in real-time, sending alerts to system controls before moisture-driven corrosion can cause compressor damage.
To support automotive and lightweight commercial applications, we are expanding our aluminum-bodied filter drier line. These units use specialized surface treatments to resist oxidation and corrosive environments, without adding excess weight.
Helping global OEMs navigate certification requirements and technical support needs.
We maintain quality and compliance certifications to support international distribution. Our manufacturing lines run under official ISO 9001:2015 registration (No. 41325Q00065R0S), verified through the CNCA database and our certification partners.
Global Compliance Standards: We ensure that all products comply with RoHS, REACH, and WEEE directives, ensuring that hazardous substances are kept below threshold values. We also offer 100% recyclable shipping packaging to support our partners' sustainability initiatives.
OEM Service Support: Taojun provides a customer service protocol with 24-hour response windows, live engineering support, and comprehensive product warranties.
Main ISO Certificate
Certification Scope
How we partner with global distributors, purchasing departments, and engineering firms.
We review system drawings and match desiccant volume, connection sizes, and pressure parameters to your specifications. Our engineering team can assist in selecting copper grades and molecular sieve densities to suit different systems.
We offer custom solutions with flexible MOQs (minimum 500 units for custom runs). Initial samples are delivered for performance and chemical tests, ensuring validation before mass production.
Our facility uses multi-shift automated production to scale output according to demand, helping partners maintain seasonal stock levels and steady lead times.
Technical insight and practical guides regarding filter driers and HVAC components.
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