Explore our industrial grade refrigeration system protectors, copper filter driers, and high-performance HVAC components designed for maximum durability.
In modern industrial and household thermal management systems, protection against overheating and excess current is paramount to avoiding catastrophic machine failures.
Hermetic compressors rely on continuous electrical cycles. When the system experiences abnormalities like locked rotors, refrigerant loss, or severe voltage drops, current levels spike. An overload protector functions as the system's heart guard. Acting as a temperature-sensitive bimetallic actuator, it interrupts electrical connections before motor winding insulation breaks down at 130°C–150°C. Modern smart HVAC infrastructure integrates both mechanical bimetallic protectors and advanced electronic solid-state sensors to ensure zero breakdown operation.
Thermal overload protectors are only as good as the medium they operate in. High moisture, chemical acids, and particulate debris accelerate electrical breakdown. This is why copper filter driers work in tandem with overload protectors. By absorbing residual moisture down to <10 PPM and capturing circulating micro-particles, filter driers protect the compressor's cylinder walls and valve plates from friction-induced overheating, directly preventing premature overload tripping.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 30 years of relentless effort, Taojun has evolved into a comprehensive high-tech enterprise integrating design, R&D, advanced manufacturing, and global sales of premium refrigeration system accessories.
Our leading products include high-performance filter driers, check valves, air conditioning valves, copper & brass fittings, and advanced motor protection-related accessories. With certified ISO 9001:2015, EU RoHS, and UL credentials, we guarantee unmatched product stability for domestic and international OEMs.
Behind every high-reliability product lies strict technical excellence, advanced test processes, and a world-class engineering team.
Rooted in academia since 1988, our primary engineering R&D center has established deep project-oriented partnerships with state key laboratories of Zhejiang University and USTC, ensuring constant innovation in thermodynamic component architecture.
Our quality standard system features raw material source audits, MES digital process tracking, online CCD visual dimensional inspections, high pressure helium leak tests, and comprehensive laboratory life-span simulation audits, ensuring defect rates remain below 0.05%.
With an expansive flexible production line, we accommodate customer-specified dimensions, material grades, and thermal configurations. We serve tier-one home appliance companies, including Haier, Midea, Whirlpool, Electrolux, and Gree.
Excellence in thermal overload protectors and system driers is validated through rigorous simulated environment stress tests:
A glimpse into our advanced production lines, testing laboratories, and robotic automated workshops.
Our journey from a local university-affiliated manufacturing factory to a globally recognized brand.
Foundation and Initial Growth: Established as Xiangshan Refrigeration Accessories Factory of Zhejiang University. Built early production facilities and refined primary brass and copper component fabrication.
Brand Establishment & Automation: Formally registered Ningbo Taojun Refrigeration Equipment Co., Ltd. and introduced the "Taojun" brand. Deployed advanced MES intelligent workshop systems and CNC high-precision machining centers.
High-Tech Enterprise Transformation: Certified as a National High-Tech Enterprise. Expanded corporate networks to over 50 countries, serving major HVAC/R global enterprises.
Adapting HVAC/R protections to meet diverse environments, strict international standards, and emerging smart grid demands.
Overload protectors and copper filter driers protect small hermetic compressors (using R600a and R134a) against voltage fluctuations and mechanical wear, prolonging appliance lifespan up to 15 years.
Ensuring system durability in supermarket showcases, medical cold storage, and logistics centers where thermal overload protections prevent refrigeration losses during heavy-duty continuous cycles.
Protecting larger rotary and scroll compressors against locked rotor currents under high outdoor temperatures, safeguarding heat pump systems during winter start-ups.
As the refrigeration industry transitions toward green alternatives (R290, R32) and smart IoT platforms, Ningbo Taojun is investing in two key areas:
Detailed technical answers addressing core engineering concerns for sourcing managers and refrigeration engineers.
Premium components manufactured for domestic, commercial, and industrial refrigeration projects.
Taojun
