Precision-engineered system protection components sourced directly from China's leading manufacturing facility.
In modern industrial and domestic refrigeration architectures, the liquid line filter dryer serves as the primary system safeguard. As the thermodynamic cycle undergoes phase changes, the presence of even trace amounts of moisture, system processing residue, or chemical oxides can initiate catastrophic compressor failures. By employing advanced 3A molecular sieves, high-purity copper shells, and robust structural grids, the system achieves maximum moisture capture capacity alongside comprehensive particulate filtration.
With the global shift towards environmentally conscious low-GWP refrigerants (such as R32, R290, and CO2 systems), oil hygroscopicity has increased significantly. Modern synthetic POE and PAG lubricants absorb atmospheric moisture at rates up to ten times greater than legacy mineral oils. Consequently, implementing a highly efficient, high-integrity filter dryer is no longer optional—it is a critical requirement to prevent acid formation, hydrolytic degradation of lubricant oils, and subsequent motor winding failures.
Established in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in the industrial manufacturing hub of Xiangshan, Ningbo, China. Originally founded as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, our organization has spent over three decades evolving into a premium, high-tech enterprise integrating product design, development, high-precision manufacturing, global sales, and after-sales support.
Our comprehensive catalog features liquid line copper filter drys, high-performance check valves, air conditioning valves, wire-tube condensers, copper and brass tube fittings, and customized insulation components. Operating under our renowned domestic brand "Lingshan" and our global identity "Taojun", we provide core system solutions for major home appliance enterprises worldwide, including industry leaders such as Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
In 2021, Taojun was formally designated a National High-Tech Enterprise, validating our ongoing engineering advancements and material innovations. We operate under stringent certifications, including ISO 9001:2015, EU RoHS Environmental Directives, REACH, and USA UL approvals.
Delivering engineering precision, quality assurance systems, and manufacturing agility to protect your supply chain.
Our core production machinery is imported directly from Germany, ensuring precise metal forming, automated brazing, and highly consistent capillary extrusion tolerances.
Our dedicated R&D center is staffed by 15 engineers, including PhDs and academic researchers from the University of Science and Technology of China, focusing on thermodynamic design and material science.
Raw materials are strictly vetted: Japanese-sourced ITO film (zero shrinkage) and European sealing compounds. Every component is backed by standard aging and performance tests.
High/low temperature thermal cycling (-35°C to 75°C for 500 hours), thermal shock testing, damp heat exposure, and 100V high-voltage breakdown protection protocols.
Equipped with a real-time Manufacturing Execution System (MES) since 2008, ensuring full process traceability and tracking from copper tube cutting to desiccant filling.
Fully compliant with EU RoHS, REACH, and WEEE directives, prioritizing sustainable manufacturing processes and using 100% recyclable shipping packaging.
The core functionality of Taojun’s copper filter line dryers is based on molecular sieve technology. Traditional dryers often struggle with modern hydrofluorocarbon (HFC) and hydrofluoroolefin (HFO) refrigerants because their synthetic oils readily break down into organic acids. Our filter dryers feature a specialized compound structure:
As the HVAC/R industry moves toward lower-GWP alternatives under the Kigali Amendment, refrigeration components must adapt to new chemical and pressure demands. Taojun is actively investing in the development of next-generation filtration technology:
Our filter dryers are designed to support a wide range of global applications, meeting localized standards and environmental demands:
1. Industrial Ice Makers & Commercial Refrigeration: Heavy-duty applications, such as commercial ice maker desiccant dryers and industrial cold rooms, require reliable filtration to handle frequent thermal expansions and contractions. Our industrial dryer cartridges offer consistent structural stability to withstand high vibration.
2. Residential Air Conditioning: High-efficiency residential heat pumps require moisture-resistant construction to prevent capillary clogging. The copper split service valves, equal-tee components, and U-bends work together to keep system lines clean and dry.
3. Ultra-Low Temperature (ULT) Cold Chains: Pharmaceutical refrigeration requires extremely low moisture levels. Our dryers use pure 3A sieves to ensure desiccant stability even at sub-zero operating temperatures.
As a global partner, Taojun offers significant supply chain advantages through our localized manufacturing footprint in Ningbo, Zhejiang:
Founded as Xiangshan Refrigeration Accessories Factory, cooperating with Zhejiang University to develop early heat exchangers and filter lines.
Integrated our Manufacturing Execution System (MES) for digital production scheduling and batch tracking.
Ningbo Taojun Refrigeration Equipment Co., Ltd. was established, introducing the brand names "Taojun" and "Lingshan" to domestic and global markets.
Expanded smart manufacturing lines and increased automated quality control tests to support larger international OEM orders.
At Taojun, we believe global product quality starts with a healthy corporate culture. We focus on four core values: Honesty, Innovation, Responsibility, and Cooperation.
Taojun operates a modern quality management system certified under GB/T19001-2016/ISO9001:2015 (Registration No.: 41325Q00065R0S). Our registration is fully verifiable through the CNCA database.
We source premium copper and desiccant materials, ensuring all finished products comply with the EU RoHS environmental directive, REACH regulations, and USA UL safety standards. For global commercial partners, this documentation ensures smooth market entry and regulatory compliance.
1. Pre-Sales Consultations: Our sales engineers offer direct technical support, drawing on over 15 years of industry experience. We respond to technical inquiries within 8 hours to keep your project moving forward.
2. Custom Engineering (OEM/ODM): We design and manufacture custom filter line dimensions, fitting configurations, and desiccant capacities to meet specific system designs.
3. After-Sales Support: We offer a one-year product warranty along with lifetime engineering support. Our team helps troubleshoot issues, evaluate system performance, and optimize configurations based on client feedback.
Explore our main product configurations, including standard copper filter driers, receiver tanks, and custom brass fittings.
Our products are exported to Europe, the Americas, South America, Southeast Asia, the Middle East, Africa, and other overseas markets. We work closely with our customers to achieve mutually beneficial, long-term partnerships.
Technical guidance and product advice from our R&D team.
3A molecular sieves have a pore opening of approximately 3 Angstroms. This size allows water molecules (2.6 Angstroms) to enter and be captured, while excluding larger refrigerant molecules like R134a or R32. Using larger pore sizes, like 4A, can trap refrigerant molecules, which reduces drying capacity and can cause chemical breakdown of the refrigerant.
Polyolester (POE) oils are highly hygroscopic, meaning they absorb water quickly. In the presence of moisture, POE oil can undergo hydrolysis, creating organic acids that damage the compressor motor insulation. Systems using POE oil require dryers with high moisture capacity and acid-neutralizing capability, which we achieve by blending molecular sieves with activated alumina.
A pressure drop is usually caused by accumulated debris blocking the filter core. If the temperature difference between the inlet and outlet of the dryer is noticeable, it indicates a restriction, and the filter should be replaced to protect the expansion valve and compressor.
We use automated argon arc welding for the main shell joints to ensure clean, strong welds. Afterward, every batch is pressure-tested and helium-leak tested under high pressure to ensure leak-free operation, even in high-pressure R410A and R32 systems.
We support both OEM and ODM orders. Our standard MOQ is 500 units per specification, which allows us to maintain efficient production runs. We also offer custom dimensions, end configurations, and packaging options based on client requirements.
Additional replacement parts, connectors, and refrigeration accessories manufactured to international standards.
Taojun
