Explore our flagship high-precision copper filter driers, accumulators, and climate control system assemblies.
A heritage of engineering excellence in refrigeration accessories.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over more than three decades of hard work and rapid development, it has now become a comprehensive enterprise integrating design, development, production, sales, and after-sales service of refrigeration accessories. In 2021, Taojun was recognized as a National High-Tech Enterprise.
Our company is committed to technological and process innovation, equipment improvement, and the introduction of advanced management concepts to produce first-class products. Customer satisfaction is our unwavering pursuit. With reasonable design, reliable quality, and perfect after-sales service, the "Lingshan" filter has become a well-known brand in the domestic refrigeration industry. The company has successively passed ISO9001:2015 quality management system certification, EU ROHS environmental protection directive certification, and US UL certification.
In 2012, Ningbo Taojun Refrigeration Equipment Co., Ltd. was established to scale global operations, creating the brand "Taojun" condensers, "Taojun" stop valves, and other series. Over the years, we have established stable partnerships with domestic and foreign home appliance giants such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Addressing the complex engineering issues of modern refrigeration loops, system acidification, and green transition.
Contemporary refrigerants (HFCs and HFOs like R32, R1234yf, and hydrocarbons like R290) are highly sensitive to trace moisture. Water reacts with polyolester (POE) lubricants, forming corrosive organic acids that destroy compressor motor windings. Our filters utilize premium 3A molecular sieves with a pore size of 3Å to selectively adsorb water molecules while ignoring refrigerant molecules, avoiding system blockage.
By blending specialized activated alumina inside our solid core variations, we establish a chemical neutralization sink that traps hydrofluoric and hydrochloric acids. This prevents premature capillary tube erosion, valve seat decay, and copper plating of steel components in heavy-duty commercial and residential HVAC compressors.
Trace mechanical contaminants (copper shavings, scale, oxide dust, flux residues) must be stopped before entering expansion devices. Our multilayer progressive filtration mesh layout gradient stops particulate contamination down to 25 microns without causing massive pressure drops that degrade system energy performance ratios (EER).
How Ningbo Taojun delivers high-performance copper drying components to international buyers.
| Functional Category | Material / Structural Specification | Core Strength & Industrial Benefit |
|---|---|---|
| Shell Core Architecture | High purity, heavy-wall red copper pipe (SF-Cu / C12200). | Unmatched oxidation resistance, reliable brazeability, and burst test rating over 60 bar. |
| Desiccant Agent | Synthetic 3A Zeolite Molecular Sieve pellets (Water adsorption ≥ 20%). | Maintains maximum adsorption capacity under high thermal loads without releasing binder dust. |
| Sealing & Assembly | Argon-arc protective welding & automated spinning process. | Guarantees hermetic seals. 100% helium chamber mass spectrometry tested for zero leakage. |
| Co-solvent Neutralizer | Synergistic combination of active carbon & activated alumina layers. | Captures soluble wax, sludge, and organic acids generated under compressor over-temperature conditions. |
Refrigeration brand procurement requires deep reliability. With 38+ years of dedicated service, Taojun guarantees key quality parameters:
Tracking over three decades of systematic growth from a specialized university lab affiliate to a global production hub.
Founded as Xiangshan Refrigeration Accessories Factory of Zhejiang University. Established core research foundations for copper accessory fabrication.
Relocated to dedicated modern factory facilities in Xiangshan, Ningbo, expanding copper tube processing lines.
Implemented MES intelligent workshop management systems, introducing precision tracking for filter drier assembly quality.
Established Ningbo Taojun Refrigeration Equipment Co., Ltd. Launched the "Taojun" brand of high-performance condensers and valves, initiating direct exports.
Officially certified as a National High-Tech Enterprise. Invested heavily in CCD visual inspection lines and leak testing automation.
Upgraded to GB/T19001-2016/ISO9001:2015 standards, supplying key HVAC/R assemblies to global appliance brands across 50 countries.
Helping procurement directors select high-value OEM/ODM component manufacturers.
Global refrigeration markets are undergoing rapid transitions toward natural refrigerants, and components must adapt. Key areas of focus include:
1. Increased System Pressures (e.g., CO2 / R744): CO2 cycles operate under much higher pressures than traditional fluorocarbons. Standard copper filter shells are replaced by high-strength copper-iron alloys (e.g., K65) or heavier wall thicknesses to handle pressures exceeding 120 bar without rupture. Our factory designs specialized copper-spinning profiles to prevent stress-concentration cracks at the transition joints.
2. Oil Miscibility in Low-GWP Systems: Hydrocarbon refrigerants like R290 and HFO refrigerants like R1234yf exhibit complex oil miscibility properties. Any particulate restriction in the liquid line can lead to oil logging in the evaporator. A reliable filter drier must maintain low pressure drops to ensure constant compressor oil return, preventing dry runs and catastrophic bearing failures.
3. Elimination of Process Contaminants: Our assembly lines ensure each copper filter is purged with dry nitrogen and hermetically sealed with rubber plugs immediately after extrusion to prevent atmospheric moisture contamination before installation.
To support global sustainability initiatives, our engineering division (supported by experts from the University of Science and Technology of China) focuses on the following research tracks:
Official validation records and compliance procedures for global distribution.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates a quality management system certified under GB/T19001-2016 / ISO9001:2015 (Registration No.: 41325Q00065R0S). This framework covers the entire lifecycle of our filter driers, condensers, and access valves.
All certification documents are verified through China's CNCA database (www.cnca.gov.cn) and audited by Zhongci International (www.zcgirz.com), guaranteeing transparency for our international partners.
Additionally, we comply with the following environmental and safety directives:
ISO 9001 Certificate
Audited Certification Scope
A closer look at our cleanrooms, manufacturing stations, and diagnostic laboratories.
Technical and commercial answers to help procurement and engineering teams make informed decisions.
Complete your supply chain requirements with our secondary line of adapter kits, condensers, molecular filters, and valves.
Taojun