Explore our top-tier catalog of custom-engineered copper fittings, filter driers, and high-durability condenser elements designed for commercial and residential cooling systems.
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. Over 30 years of hard work and rapid development has shaped us into a comprehensive enterprise integrating design, development, production, sales, and after-sales service for global refrigeration accessories. In 2021, we were officially recognized as a National High-Tech Enterprise.
Our leading products include: filter driers, check valves, air conditioning valves, wire-on-tube condensers, brass and copper accessories, and HVAC cable ties. We are deeply committed to process innovation, manufacturing equipment improvement, and the introduction of advanced lean management concepts to maintain a zero-defect standard. With reasonable thermal design, reliable mechanical structural integrity, and perfect technical support, our "Lingshan" filter has become a benchmark in the domestic refrigeration sector.
To assure global supply chain integration, we have passed ISO9001:2015 quality management system certification, EU ROHS environmental directive compliance, and US UL safety certifications. Continuous management innovation is our strategy to guarantee high stability, durability, and commercial viability for our global OEM and ODM partners.
Analyzing heat dissipation dynamics, pressure drop constraints, and structural configuration for next-generation refrigeration appliances.
In modern vapor-compression refrigeration systems, the wire-on-tube condenser is critical for thermal regulation. By utilizing steel wires spot-welded to both sides of a bent copper or steel fluid line, these components optimize the heat transfer coefficient without significantly increasing weight or costs. This technology is widely deployed across domestic refrigerators, beverage coolers, and commercial ice makers.
The efficiency of a wire condenser is governed by structural parameters: wire pitch, tube spacing, wire diameter, and raw material thermal conductivity. The air-side heat transfer coefficient represents the major thermal resistance in natural convection environments. By engineering a precise wire pitch (typically between 2mm to 4mm) and using low-carbon steel wires (coated with copper or paint), we maximize the secondary heat transfer surface area (fins) while preventing air stagnation boundaries.
Refrigeration systems are frequently exposed to moisture, leading to galvanic corrosion at joint interfaces—especially when copper tubing is paired with steel wires. Ningbo Taojun employs advanced surface treatments, including cathodic electrodeposition (e-coating) and zinc plating, ensuring our assemblies survive over 500 hours in standard salt-spray environments (ASTM B117). This longevity is crucial for appliances operating under high-humidity tropical conditions.
With global environmental regulations pushing for low-GWP (Global Warming Potential) refrigerants like Isobutane (R600a) and Propane (R290), minimizing the internal volume of the condenser is essential due to safety-related charge limits. Our engineers use advanced computational fluid dynamics (CFD) modeling to optimize tube internal diameters, balancing pressure drops against the phase-change heat transfer rate. This ensures maximum efficiency while staying within safety charge limits.
Taojun has specialized in manufacturing refrigeration components for 38 years, designing premium hardware to eliminate moisture and impurities.
Our filter driers and condensers are built with the highest industrial standards to prevent failure points:
We focus on metrics that directly impact system Coefficient of Performance (COP):
Delivering high-reliability solutions for diverse heating and cooling integration challenges:
Precision engineering combined with automated machinery guarantees consistent quality at scale.
Our core processing and testing lines are directly imported from Germany, ensuring precise forming tolerances.
Collaborative R&D programs with Zhejiang University drive thermodynamic design and new material evaluation.
Fully customizable shapes, sizes, and connections to meet specific appliance geometry constraints.
High-grade ITO films and liquid crystal components are sourced from Japan to support smart control displays.
Strict thermal cycling (-35°C to 75°C for 500 hours) and high-voltage leak tests verify zero operational defects.
Meeting rigorous global compliance standards for leading consumer appliance and commercial HVAC brands.
Ningbo Taojun operates a quality management system certified under GB/T19001-2016 / ISO9001:2015 (Registration No: 41325Q00065R0S). This framework governs our manufacturing processes, raw material sourcing, and finished goods testing protocols.
Our products comply with critical international market access regulations, including the EU RoHS environmental directive, REACH, and UL safety listings for pressurized systems. Our certification details can be verified via the Chinese CNCA portal.
Quality Certification
Scope of Application
Over the past three decades, we have established long-term engineering and supply partnerships with market leaders. Our components are integrated directly into systems manufactured by:
Through our integrated Manufacturing Execution System (MES), every batch of copper filter driers and wire condensers is assigned a unique production ID. This allows us to track raw material chemistry, assembly lines, brazing oven temperatures, and helium leak test parameters, providing complete transparency for audits.
Positioning your supply chain to meet upcoming environmental directives and energy efficiency challenges.
As the Kigali Amendment drives the phase-down of HFCs (such as R134a), the industry is shifting to natural refrigerants like R600a and R290. These gases require highly clean systems with zero internal chemical residues. Our proprietary interior wash process removes oil residues, preventing chemical reactions that could plug capillary tubes.
With stricter minimum energy performance standards (MEPS) globally, optimizing heat transfer at the condenser is critical. Our double-sided spot-welding patterns ensure high contact areas between the copper tube and cooling wires, improving overall heat transfer by up to 15% compared to traditional configurations.
As outdoor AC condensers and transport refrigeration units face harsher environments, conventional paint coatings are no longer sufficient. We offer specialized finishes like multi-layer epoxy powder coating and zinc-rich basecoats, providing excellent resistance to salt spray and atmospheric corrosion.
Ningbo Taojun's roots date back to 1988 with the establishment of the Xiangshan Refrigeration Accessories Factory of Zhejiang University. This academic foundation has driven our focus on engineering and research. Over the past three decades, we have continuously modernized our facilities to keep pace with changing technologies.
Our business philosophy is built on four core values: Honesty, Innovation, Responsibility, and Cooperation. These principles guide our day-to-day operations and help us build strong relationships with our clients.
Pre-Sales Engineering Support: Get direct technical consulting from engineers with over 15 years of industry experience. We respond to inquiries within 8 hours and offer 24/7 technical hotline access.
Comprehensive After-Sales Support: We provide system troubleshooting, performance audits, and a one-year warranty, along with free lifetime technical support.
Get expert answers to common questions about wire condenser design, performance, and supply chain logistics.
Review additional products in our line, including copper bend fittings, charging hoses, and auxiliary vacuum pumps.
Taojun