Ningbo Taojun Refrigeration Equipment Co., Ltd. (operating globally as Juntao Refrigeration), situated in the industrial hub of Xiangshan, Ningbo, is a premium manufacturer specializing in fluid control and purification components for the global HVAC/R market. Established in 1988 as the Xiangshan Refrigeration Accessories Factory under the direct technical lineage and support of the esteemed Zhejiang University, our organization has achieved over three decades of systematic expansion and technical validation.
Our core product line features copper and aluminum filter driers, check valves, air conditioning valves, condensing units, high-grade brass/copper fittings, and climate-resistant cable wrapping systems. Under our leading domestic brand "Lingshan", our filter products have garnered industry-wide praise for their high material integrity and stability. Recognizing our continuous investment in automated production and process engineering, we were certified as a National High-Tech Enterprise in 2021.
In 2012, our international expansion led to the creation of the global "Taojun" division. Under this banner, we have developed close, tier-1 partnerships with globally recognized home appliance conglomerates including Gree, Midea, Haier, Xinfei, Whirlpool, Electrolux, and Huarui.
Our manufacturing processes utilize precision automated machinery to deliver consistent internal core densities. Our copper filter driers are designed to withstand high operational burst pressures required by next-generation HFC and hydrocarbon refrigerants. By maintaining strict control over raw materials and utilizing automated orbital TIG/argon-arc welding, we guarantee zero-leakage performance under extreme system thermal cycles.
In high-capacity HVAC/R systems, the air conditioning filter drier represents the primary defense mechanism against system breakdown caused by liquid contaminants, volatile organic compounds, and acid formation. When moisture penetrates a closed loop, it reacts with synthetic lubricants (such as POE or PAG oils) and modern halogenated refrigerants. This chemical breakdown yields highly corrosive acids (hydrofluoric and hydrochloric acids) which compromise compressor winding insulation, accelerate copper plating on bearing surfaces, and cause chemical corrosion of the system's expansion valves.
Our filter driers incorporate high-porosity 3A (Angstrom) molecular sieve crystals. The 3Å pore size is specifically chosen to selectively adsorb water molecules (molecular diameter ~2.6Å) while completely excluding refrigerant molecules like R134a or R410A (molecular diameters > 4Å). This prevents competitive adsorption, preserving 100% of the active site density for water absorption.
We utilize C12200 high-purity copper tubing (minimum copper content 99.9%) for our filter housings. This alloy provides superior thermal conductivity, high corrosion resistance, and high ductility. This ductility is crucial for absorbing structural vibrations and maintaining structural integrity when subjected to internal mechanical stress and high-pressure surges.
Our filter structure integrates a high-density, multi-stage stainless steel mesh boundary. The primary mesh captures large solder slag and metal filings, while the secondary micro-mesh prevents particulate migration down to 20 microns. This multi-layered design ensures low pressure drop, maximizing system coefficient of performance (COP).
Our chemical engineering lab, staffed by senior researchers collaborating with the University of Science and Technology of China, continuously evaluates desiccant formulations. We optimize the ratio of molecular sieves and activated alumina in our solid-core lines to provide targeted organic acid neutralization, preventing premature compressor motor burnout.
At Taojun, we reject compromises. To guarantee consistent quality, our manufacturing facility is equipped with automated machinery imported directly from Germany. We control trace impurities through a systematic manufacturing execution system (MES) that tracks each component batch from raw copper extrusions to the final packaged unit.
Our quality verification processes include:
In modern industrial and commercial infrastructure, HVAC/R systems are designed with increasing complexity. The integration of high-efficiency scroll compressors, microchannel heat exchangers, and electronic expansion valves (EEVs) requires highly precise fluid management. Standard off-the-shelf components often fail to meet the performance criteria of these systems. As an engineering-focused OEM supplier, Taojun designs complete solutions across multiple industrial sectors:
Our heavy-duty molecular sieve liquid line filter driers are designed to handle large refrigerant volumes. They maintain dry operating conditions in walk-in freezers, supermarket display cases, and refrigerated transport containers, preventing valve freeze-up and safeguarding perishable assets.
With the global phase-out of HCFCs, modern VRF systems utilize high-pressure refrigerants like R410A and R32. Taojun's copper accumulator-driers and double copper filters feature reinforced wall thicknesses and reliable braze connections to ensure trouble-free operation over extended system lifespans.
Modern electric vehicles (EVs) utilize advanced heat pump configurations to manage both cabin temperature and battery thermal performance. Our lightweight aluminum receiver-driers are engineered to satisfy stringent automotive vibration requirements and match the high-efficiency demands of R1234yf systems.
Originated as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. This direct connection with leading academic researchers established our technical foundation in thermodynamic cycle mechanics and mechanical filtration.
Constructed our dedicated manufacturing facility in Xiangshan. This expansion integrated advanced metal stamping, automated extrusion lines, and cleanrooms for molecular sieve handling, increasing production capacity for domestic home appliance OEMs.
Implemented our MES (Manufacturing Execution System) intelligent workshop management database. This system tracks furnace temperatures, raw material certs, and gas charging pressures for each production batch, enabling complete traceability.
Achieved deep supply chain integration with leading global brands across Europe, South America, North America, Southeast Asia, and Africa. We continue to expand our automated smart manufacturing systems to produce zero-leakage components for next-generation systems.
Operating a global HVAC/R supply chain requires complete compliance with international regulatory bodies. Our production processes are validated against strict international guidelines to ensure compatibility with high safety and environmental standards.
Juntao Refrigeration holds a verifiable GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) for the design, development, and manufacturing of refrigeration parts (copper filter driers, condensers, access valves). This quality management framework ensures that every raw material shipment is verified for compliance, and every production step is documented and measured.
ISO 9001:2015 Main
Scope of Certification
US UL Safety Standards
EU RoHS Green Compliant
REACH Chemical Safety
Factory Quality Assurance Document
Corporate Verification Record
Collaborating with our engineering team gives you access to 35+ years of refrigeration design expertise. We help you choose the right component sizes and desiccant materials based on your specific system operating conditions.
Our relationship with our partners continues long after delivery. We provide technical support to ensure smooth integration into your assembly lines and reliable product field performance.
The global HVAC/R market is undergoing a major shift driven by regulations like the Kigali Amendment and the EU F-gas rules. The industry is transitioning toward ultra-low global warming potential (GWP) alternatives and natural refrigerants, including CO2 (R744), Propane (R290), and Isobutane (R600a). This shift introduces new technical challenges for system components:
Natural refrigerants operate under different pressures and chemical parameters. For example, transcritical CO2 systems require components to withstand high operational pressures, often exceeding 120 bar. In contrast, R290 systems require minimal charge sizes due to their flammability, necessitating smaller, highly efficient filter drier designs.
Taojun's R&D department is actively developing solutions to meet these requirements. We are testing copper-iron alloy (CuFe2P) shells to handle higher pressures, and developing high-density solid-core molecular sieve configurations. These new designs provide the required moisture absorption capacity while minimizing internal volume, helping OEMs meet safety regulations without sacrificing filtration performance.
Designed for lightweight refrigeration systems, maintaining steady flow rates under temperature fluctuations.
Ensures water absorption and filtration for ice maker systems, preventing valve freezing.
Heavy-duty cartridges configured for commercial and industrial water extraction pipelines.
Fully customizable spun copper shapes and connections designed to fit compact spaces.
Multi-purpose assemblies that reduce compressor pulsation noise while filtering fluid.
Engineered to customer specifications, maintaining wall thickness uniformity and fit.
Lightweight alternative constructed for automotive AC loops and high corrosion resistance.
Features a solid desiccant core for high system reliability and flow protection.
Designed with dual chambers to maximize moisture and acid removal capacity.
Our standardized domestic refrigerator series is optimized for low-charge systems. Available in 10g, 15g, and 20g configurations, these units provide reliable protection for residential appliances.
Our sales and logistics network supports major commercial and industrial hubs worldwide. We export refrigeration components to Europe, North America, South America, Southeast Asia, the Middle East, and Africa. We work closely with our global partners to build efficient, reliable cooling systems.
Taojun