Factory-direct solutions manufactured to rigorous ISO 9001 and UL safety standards
Unlocking electrical efficiency and high reliability in variable-speed HVAC/R systems and grid-tied inverters.
In contemporary power electronic converters, the DC Link stage serves as the intermediate buffer balancing the transient power difference between the input rectifier and the high-frequency inverter output. Whether processing energy in a commercial VRF (Variable Refrigerant Flow) system, driving a multi-megawatt industrial chiller, or feeding renewable energy into the grid, the selection of the DC Link Capacitor directly governs system efficiency, electromagnetic compatibility (EMC), and overall system lifetime.
Taojun
L = L0 * (V0 / V)^n * 2^((T0 - T) / 10)
While legacy systems relied heavily on aluminum electrolytic capacitors due to their low initial cost per microfarad, modern high-frequency converters demand the superior characteristics of Metallized Polypropylene Film Capacitors. These capacitors feature low self-inductance (ESL), ultra-low ESR, self-healing capability, and an exceptionally high tolerance for overvoltage transients. When integrated with advanced HVAC controllers, they stabilize the DC bus voltage, filter high-frequency current harmonics, and protect sensitive IGBT modules from voltage spikes.
Why leading global HVAC/R and power electronics brands choose Taojun (Juntao) as their strategic sourcing partner.
Founded in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, we maintain academic ties that support advanced R&D. Our team features 15 highly specialized engineers, collaborating directly with professors and doctoral researchers from the University of Science and Technology of China.
Our film capacitor materials and mechanical components follow high standards. We import premium raw materials including optical-grade ITO film (zero shrinkage, no color difference) and liquid crystal spacers from Japan, and specialized resins from Europe, ensuring thermal stability up to 90°C.
Utilizing high-tech manufacturing equipment imported from Germany and Japan, our factories employ Argon Arc Welding, helium leak detection, and automated CCD optical inspection. This high precision reduces system impedance and guarantees a leakage rate near zero.
Decarbonization, high power densities, and intelligent building networks are shifting component specifications.
The global shift toward eco-friendly refrigeration and high-voltage DC networks requires components that can withstand extreme electrical stress. Our product range satisfies the requirements of eco-friendly systems using natural refrigerants (R290, CO2) and high-frequency variable speed compressors. Ningbo Taojun Refrigeration Equipment Co., Ltd. is at the forefront, providing integration solutions that meet the requirements of leading brands including Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Modern HVAC systems are shifting toward variable-frequency drive controls to optimize energy use. Advanced DC-link filtering stabilizes voltage fluctuations, protecting sensitive components and minimizing electromagnetic interference (EMI) on the electrical grid.
Outdoor refrigeration and heat pump units face extreme high and low-temperature fluctuations. Our components undergo 500-hour testing at -35°C and 75°C, damp heat testing for 500 hours, and thermal shock testing from 10°C to 90°C to ensure stable performance.
Global logistics demand strict certification. Taojun's manufacturing lines are certified to ISO9001:2008, EU RoHS, REACH, and US UL standards, enabling seamless integration into European, North American, and Asian markets.
Over 35 years of engineering experience in refrigeration parts and electronic components manufacturing
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. The company's leading products include: filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties and other refrigeration accessories series products. After 30 years of hard work and rapid development, it has now become a comprehensive enterprise integrating the design and development, production and sales, and after-sales service of refrigeration accessories. In 2021, it became a national high-tech enterprise.
In 2012, Ningbo Taojun Refrigeration Equipment Co., Ltd. was established, creating the brand "Taojun" condensers, "Taojun" stop valves and other series of products. Over the years, it has established partnerships with well-known domestic and foreign home appliance enterprises such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Main Production Site
Precision Machining
Testing Laboratory
QA Department
Taojun has specialized in refrigeration parts for 38 years. Our core range includes filter driers, access valves, and condensers. Feature: TAOJUN copper filter driers are designed to absorb moisture and acid, and to filter out impurities. They are installed as original components and supplied as repair parts for both domestic and commercial refrigerators, freezers, and air conditioners.
Striving to build a reliable world brand backed by honest values, technical innovation, and responsible cooperation.
1998 - Original Factory Building
2008 - MES Intelligent Workshop Management
2024 - Modernized R&D Center & Facility
Honesty: Our group adheres to the principle of people-oriented, integrity-driven management. Quality and reputation are the real sources of our competitive edge.
Innovation: Innovation leads to development, which leads to increased strength. We innovate in concept, mechanism, technology, and management to stay prepared for emerging market opportunities.
Responsibility: We maintain a strong sense of responsibility and mission for our clients and society. This long-term commitment drives our development.
Cooperation: Working together to create a win-win situation is a key development goal. Through active cooperation, we integrate resources and allow professionals to maximize their specialty.
Modern Assembly Workshop
Automated Production Line
R&D Analysis Laboratory
Official ISO 9001:2015 registration validating OEM & ODM precision manufacturing capacities.
Main ISO 9001 Certificate
Detailed Scope of Certification
Juntao Refrigeration (NINGBO TAOJUN REFRIGERATION EQUIPMENT CO., LTD.) operates under official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) for the design and production of refrigeration components, including filter driers, condensers, and access valves. This validates our design, production control, and global supply capacities.
Pre-Sales Service: One-to-one consultation with sales engineers who offer over 15 years of technical experience. Responsive service is available 24/7, with inquiries addressed within 8 hours.
After-Sales Support: Technical training, system installation guidance, and troubleshooting support. We offer a one-year warranty alongside lifetime technical assistance to continuously improve quality based on customer feedback.
UL Safety Certification
RoHS Environmental Directive
Quality System Audited Certificate
High-Tech Enterprise Certificate
Answers to critical questions regarding component reliability, materials, and applications.
Explore our full line of refrigeration and heat dissipation hardware for global distribution.
Direct access to our certified components range for domestic and commercial home appliances.
Universal Copper Refrigeration Filter Drier for Ice Maker Desiccant Dryer
Universal Industrial Dryer Filter Cartridge for Ice Makers
TAOJUN copper fittings for Refrigerator & AC
Factory Customized 10g 15g Welding Copper Filter Drier
Copper Accumulator/ mufflers/ Filter Drier for HVAC Parts
Custom Extruded Copper Drying Filters
Brass fittings for Refrigerator Freezer Parts
Air Conditioning Fitting Charging Hose Safety Valve
