Engineered components designed for system safety, surge protection, and high-performance climate control.
Ensuring operational durability through state-of-the-art protection devices and optimal filtration technology.
In the modern HVAC&R (Heating, Ventilation, Air Conditioning, and Refrigeration) sector, electrical anomalies and mechanical strains represent the primary causes of compressor failures. An overload protector acts as the vital safeguard for hermetic motors, breaking the electrical connection when temperatures or current loads exceed critical thresholds. As a leading manufacturer in Ningbo, China, we integrate structural thermal protection engineering alongside high-efficiency filtration components.
To prevent premature compressor burnout, our engineering division implements complex current-temperature coordination. By coordinating the performance of our air conditioning contactors, inverter control PCB boards, and fan motors, we establish a robust electrical safety shield. This guarantees that commercial chillers, domestic freezers, and industrial HVAC plants operate smoothly without risk of thermal failure.
When compressors encounter sudden pressure spikes, refrigerant blockages, or grid fluctuations, current levels rapidly climb. Without reliable overload protectors and robust starter relays, the motor winding temperature exceeds safe operating limits.
By combining our copper filter driers to remove moisture and acids with our contactors to handle high-power loads, we lower overall system resistance. The result is a highly efficient refrigeration loop that reduces thermal build-up and enhances equipment durability.
A Legacy of Scientific R&D, Technological Innovation, and Uncompromising Quality Controls Since 1988
Watch our advanced production workshop and automated processing systems in action.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a scenic coastal industrial hub. Founded in 1988, our predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over three decades of steady expansion has transformed Taojun into a integrated national high-tech enterprise focusing on design, development, production, and sales.
Our core products include: filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties, and related safety control systems. With advanced engineering and strict compliance with global guidelines, customer satisfaction remains our primary focus. Under our recognized domestic brand "Lingshan" and our global brand "Taojun", we provide safety-critical refrigeration elements across five continents.
To meet the challenges of next-generation cooling technologies, we work closely with national academic institutions to pioneer smart controls, robust structural brazing methods, and environment-friendly production practices.
Understanding the engineering capabilities that make Ningbo Taojun the preferred industrial partner.
Our core production machinery, high-speed stamping presses, and automated testing rigs are imported directly from Germany, ensuring precise tolerances and reliable performance.
Our engineering team features 15 dedicated researchers, including doctoral graduates and professors from the University of Science and Technology of China, focusing on fluid dynamics and electrical safety.
We supply custom designs, dimensions, and electrical configurations tailored to your specific application. Our flexible production lines adapt to unique technical drawings and private labels.
We source key film elements directly from Japan, ensuring zero thermal shrinkage or color deviation. Our high-grade adhesives are imported from Europe, withstanding high thermal limits of 80-90°C.
Components undergo high/low temperature tests (75°C to -35°C for 500 hours), thermal shock trials, damp-heat evaluation, and 100V high-voltage insulation tests to prevent operational breakdown.
All finished products are certified compliant with EU RoHS, REACH, and WEEE directives. We employ green, lead-free silver brazing alloys and utilize 100% recyclable packing materials.
Beyond electrical protection, our copper filter driers play a vital role in mechanical system safety. High-purity copper shells combined with a 3A molecular sieve core maintain low moisture levels (water absorption ≥ 20%), preventing freeze-ups at the expansion valve. Removing moisture prevents the formation of corrosive hydrochloric and hydrofluoric acids, protecting motor winding insulation and extending compressor lifetime.
Integrating electrical protection and system filtration across domestic, commercial, and transport HVAC industries.
In residential refrigeration, space constraints require compact, highly sensitive safety components. Our copper filter driers and mini thermal overload protectors safeguard small hermetic compressors against voltage fluctuations and high ambient heat, ensuring continuous, quiet operation.
Supermarkets, warehouse cold chain distribution centers, and commercial walk-in freezers require continuous operation. We pair heavy-duty AC contactors with bimetallic overload relays to protect three-phase motors from phase loss, voltage imbalances, and continuous high-load operations.
Industrial processes demand precise thermal control. By combining our inverter control PCB boards with smart sensors, we monitor system current and pressure in real-time. This dynamic system quickly isolates thermal overloads before any winding damage can occur.
Pioneering smart, sustainable HVAC protection systems for international markets.
As the HVAC&R industry transitions to eco-friendly refrigerants like R290 (propane) and R600a (isobutane), system safety standards are changing. These natural refrigerants are flammable, requiring ignition-proof components and precise electrical safety controls. Our future roadmap focuses on development in these key areas:
Taojun is dedicated to eco-friendly manufacturing practices. By optimizing our energy consumption, recycling copper and aluminum scraps, and using green, lead-free brazing processes, we actively lower the carbon footprint of our HVAC components. This supports global brands in reaching their sustainability targets.
Ensuring consistent quality, competitive pricing, and fast international delivery.
Located near Ningbo Port, one of the world's busiest container hubs, Taojun utilizes a highly integrated local industrial cluster. We maintain close partnerships with major domestic raw material suppliers, guaranteeing consistent access to high-purity copper, performance bimetallic strips, and high-performance molecular sieves.
Inside our manufacturing plant, our MES (Manufacturing Execution System) coordinates production scheduling, tool wear tracking, and automated quality testing in real-time. This digital workflow allows us to offer flexible OEM/ODM options with low MOQs, quick turnarounds, and short shipping lead times.
Our quality management system is fully certified under ISO 9001:2015 (Registration No.: 41325Q00065R0S), verified by CNCA and partner auditing networks.
Established in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, our history is characterized by continuous technical development and innovation.
1988: Established under scientific partnership with Zhejiang University, focusing on copper fittings and filtration.
1998: Relocated to our current modern factory, upgrading to automated production lines.
2008: Deployed our MES system, improving quality controls and product traceability.
2012: Established Ningbo Taojun Refrigeration Equipment Co., Ltd., launching our dedicated "Taojun" brand.
2021: Officially recognized as a National High-Tech Enterprise, passing strict quality audits.
Building a respected brand requires a strong company culture. Our growth has been supported by our core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty: We adhere to integrity-focused management and quality-first principles, building reliable partnerships with leading appliance manufacturers such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Innovation: We continuously upgrade our manufacturing equipment and management methods, ensuring our facility is ready for new market opportunities.
Responsibility: We maintain strict testing standards to ensure reliable components, protecting our customers' systems and reputations.
Providing engineering expertise and support from initial inquiry to long-term operations.
Our team provides dedicated technical support. We assist with component matching, system compatibility checks, and parameter verification to ensure optimal HVAC system design.
During production, we conduct high-voltage leakage checks, helium leak detection, and mechanical endurance tests, providing detailed inspection reports for every batch.
We provide a comprehensive one-year warranty alongside lifelong technical support. Our engineering team assists with troubleshooting, system updates, and performance optimization.
Explore our tools, heavy-duty contactors, and copper piping components.
Technical explanations regarding overload protection, refrigeration safety, and OEM sourcing.
Taojun