In critical cooling networks, moisture, acid, and solid contaminants represent the primary precursors to premature compressor breakdown. As a leading manufacturer with over three decades of research-driven expertise, Taojun Refrigeration designs high-capacity HVAC drier filters engineered to protect commercial and domestic cooling cycles.
Modern HVAC/R applications increasingly deploy synthetic polyolester (POE) and polyvinyl ether (PVE) lubricants alongside low-GWP refrigerants (e.g., R32, R1234yf, and carbon dioxide). These newer synthetic lubricants are highly hygroscopic, absorbing atmospheric moisture at rates up to 100 times higher than traditional mineral oils. When moisture breaches the hermetic system, it triggers the hydrolysis of POE lubricants, generating hydrofluoric and organic acids. These corrosive elements dissolve electrical winding insulation, corrode copper pipes (inducing copper plating on bearing surfaces), and ultimately culminate in catastrophic compressor motor burnouts.
Our engineered copper and brass filter driers utilize a premium thermodynamic blend of 3A molecular sieves combined with active alumina cores, delivering industry-leading water absorption capacity (≥20%) and maximum acid entrapment. By maintaining the refrigeration circuit at sub-critical moisture levels, Taojun filters prevent structural deterioration and scale formation within capillary tubes and expansion valves.
Founded in 1988, the predecessor of Ningbo Taojun Refrigeration Equipment Co., Ltd. was the prestigious Xiangshan Refrigeration Accessories Factory of Zhejiang University. Centered in Xiangshan, Ningbo—a coastal hub known for industrial excellence—we transitioned from an academic technology incubation partner into a national high-tech enterprise in 2021.
Over our 30+ year trajectory, our team has integrated advanced materials science with precise metal fabrication methods. Under the proprietary domestic brand "Lingshan" and the international product brand "Taojun", we manufacture copper filter driers, check valves, air conditioning access valves, condensers, and precision brass fittings. Through constant investments in automated manufacturing systems and lean management structures, we guarantee first-class product reliability across domestic and commercial industrial scales.
Taojun HVAC drier filters are developed to prevent fluid resistance while maximizing mechanical strength, ensuring they function reliably under high operating pressures.
The external shell of our drier filter is manufactured using TP2 (C12200) phosphorus-deoxidized copper tubing, featuring a minimum copper content of 99.9%. This choice of alloy exhibits excellent cold forming properties and high thermal conductivity, and is highly resistant to stress corrosion cracking under elevated pressure conditions. TP2 copper permits robust brazing welds when joining to system tubing, eliminating weak joints that lead to refrigerant charge leaks.
Internally, we employ a multi-barrier filtration stack. This includes a high-capacity 3A molecular sieve desiccant bed bounded by dense, non-woven glass-mat filters and custom stainless steel mesh arrays. The 3A pore configuration selectively adsorbs water molecules (kinetic diameter ~2.6 Å) while excluding larger refrigerant molecules like R410A, R134a, or R32 (typically >3.9 Å), preventing catalytic refrigerant decomposition within the drier body.
Our core production machinery is imported directly from Germany, ensuring precise machining tolerances (down to ±0.02mm) and repeatable quality control across high-volume production runs.
Our research and development team includes 15 engineers, including doctors and researchers from the University of Science and Technology of China (USTC). This academic foundation supports our work in desiccant design, thermodynamic simulation, and product prototyping.
We source key raw materials from reliable global suppliers. Our high-uniformity liquid crystal spacers and ITO films are sourced from Japan, and we utilize high-temperature protective films that resist degradation at temperatures of 80°C to 90°C.
Our components undergo 500 hours of continuous high and low temperature cycling (-35°C to 75°C), thermal shock testing (10°C to 90°C for 30 minutes), and damp heat exposure. Finished units are also subjected to 100V electrical isolation and pressure leakage checks.
To ensure system integrity, every batch of copper filter driers and receivers is tested using automated high-pressure helium leak detection rigs, identifying microscopic structural voids down to 1x10⁻⁸ mbar·l/s.
We support refrigeration wholesalers and system developers with bespoke design modifications. We offer custom dimensions, end connection configurations, and personalized branding options with a low minimum order quantity (MOQ) of 500 units.
The HVAC/R industry is undergoing a global transition driven by regulations like the Kigali Amendment, which mandate the phasedown of high-GWP HFCs in favor of natural alternatives (hydrocarbons like R600a, R290, and CO₂/R744). These system changes require updated component designs. For instance, carbon dioxide systems operate at pressures up to 10-15 times higher than R22 systems, demanding increased mechanical wall thickness and stronger braze welds.
Taojun's engineering team collaborates with partners to supply components designed for these high-pressure operations. Our copper accumulator shells, receiver tanks, and capillary tubing options are engineered to withstand these demanding performance profiles, ensuring reliable system integration for refrigeration developers worldwide.
Our advanced manufacturing facility utilizes automated high-frequency induction brazing and real-time CCD visual QC inspection systems.
2024 Expansion
1998 Factory Site
2008 MES System
We believe that a global brand relies on a strong corporate culture, built over years through the principles of Impact, Infiltration, and Integration. Our growth is guided by four core values:
From residential cooling units to high-demand commercial cold chains, Taojun components are designed to meet diverse and challenging operational requirements.
We provide comprehensive pre-sales support, drawing on our 15 years of technical experience in refrigeration design. Our sales engineers consult on projects to select components that align with specific system parameters, flow rates, and fluid configurations. The service hotline is available 24/7, with a commitment to address technical inquiries within 8 hours.
Our commitment extends beyond delivery. Taojun provides equipment evaluations, field installation support, and technical training on system cleanliness. All manufactured components include a one-year warranty, backed by lifetime technical support to help optimize the operating life of your system components.
Ningbo Taojun Refrigeration Equipment Co., Ltd. maintains a quality management system certified to GB/T19001-2016 / ISO9001:2015 standards (Registration No. 41325Q00065R0S). This certification covers the design and manufacture of filter driers, condensers, and access valves. It is verifiable via the official CNCA database (www.cnca.gov.cn) and through Zhongci International (www.zcgirz.com), validating our production standards for global OEM and ODM partnerships.
Main Certification Document
Detailed Scope of Certification
As global environmental policies shift towards lower Global Warming Potential (GWP) alternatives, the design requirements for HVAC/R system components continue to evolve.
| Feature / Parameter | Legacy Specifications | Next-Generation Standards | Taojun Engineering Solution |
|---|---|---|---|
| Refrigerant Compatibility | HCFCs, HFCs (R22, R134a, R404A) | Low-GWP HFOs, Natural Ref. (R32, R290, CO₂) | Optimized 3A molecular sieve blends preventing refrigerant catalyst reactions. |
| Pressure Tolerances | 1.5 MPa to 3.0 MPa | 4.5 MPa to 14.0 MPa (CO₂ Transcritical) | Thickened TP2 copper tubing and automated induction brazing configurations. |
| Acid Adsorption Capacity | Basic moisture retention | Dual-action moisture & organic acid capture | Composite core models integrating activated alumina with molecular sieves. |
| Environmental Compliance | Standard scrap recovery | RoHS, REACH, WEEE, 100% recyclable packing | Certified lead-free raw materials and eco-friendly packaging solutions. |
We continue to invest in our production and testing facilities to meet these evolving standards. Our facilities include testing laboratories, pilot production lines, and dedicated assembly areas, allowing us to evaluate prototype components under simulated operating conditions and verify performance before volume production.
WorkShop
Product Line
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For system upgrades, repair, and replacement, refer to the individual model sheets below:
Taojun's products are exported to Europe, North America, South America, Southeast Asia, the Middle East, Africa, and other global regions.
Taojun