Explore our core engineering catalog of standard and custom-manufactured cooling elements.
Analysing the thermodynamics, metallurgy, and structure needed to handle up to 130 Bar of pressure in eco-friendly systems.
Unlike standard synthetic refrigerant systems, CO2 (R744) operates under immense pressure. Our gas coolers and subcritical condensers employ specialized copper-iron alloys (e.g., K65) or reinforced thick-walled copper and stainless steel tubes. This allows them to securely withstand design pressures of up to 130 bar for transcritical operation, maintaining structural safety even under heavy thermal cycling.
Optimizing thermodynamic performance is critical in gas cooler design. Microchannel heat exchangers (MCHX) drastically reduce the necessary refrigerant charge while keeping heat transfer rates high. For heavy-duty commercial applications, our advanced finned tube configurations leverage inner-grooved pipes to increase turbulence and efficiency, helping systems run effectively even during high ambient summer peaks.
The transition to transcritical R744 setups requires smart valves and pressure control systems. We design our condensers to integrate smoothly with electronic expansion valves (EEVs) and pressure sensors. This allows for real-time monitoring and adjustments between subcritical and transcritical operations, maximizing the overall Coefficient of Performance (COP).
Over 35 years of engineering excellence, starting as a university accessories factory to become a national high-tech manufacturing leader.
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.
Our company is committed to technological and process innovation, equipment improvement, and the introduction of advanced management concepts to produce first-class products. Customer satisfaction is our unwavering pursuit. With reasonable design, reliable quality, and perfect after-sales service, the "Lingshan" filter has become a well-known brand in the domestic refrigeration industry. The company has successively passed ISO9001:2008 quality management system certification, EU ROHS environmental protection directive certification, and US UL certification.
Our Original Factory Building & Zhejiang University R&D foundations.
Deployment of the MES intelligent workshop management system.
Next-gen CO2 Transcritical gas coolers & Smart cooling technology.
Specializing in high-performance refrigeration parts designed to maintain system cleanliness and thermodynamic efficiency.
Taojun specializes in refrigeration parts for over 38 years. Our catalog 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 commonly installed as OEM components or used as replacement repair parts for both domestic and commercial refrigerators and freezers.
How R744 natural cooling architectures solve strict decarbonization and performance challenges across industries.
| Sector Application | Core System Challenges | CO2 Condenser / Gas Cooler Solution | Environmental & Financial Benefits |
|---|---|---|---|
| Commercial Supermarkets | High energy consumption, strict F-gas phase-out compliance in EU/US. | Multi-compressor racks coupled with high-pressure transcritical gas coolers. | Zero ODP, GWP = 1, compliant with all future environmental regulations. |
| Industrial Cold Storage | Managing massive refrigeration capacity, oil return, and safety issues. | Finned tube CO2 evaporators and gas coolers built for high pressure. | Reduced charge volume, lower operating costs, and enhanced safety profile. |
| Heat Pumps (HP Water Heaters) | Achieving high water output temperatures in low ambient conditions. | Transcritical CO2 heat pumps designed with high temperature glide. | COP above 4.0, delivering hot water up to 90°C efficiently. |
| Refrigerated Transport | Dealing with physical vibrations, size limits, and changing ambient temperatures. | Compact microchannel R744 condensers designed to resist vibration. | Reduced system weight, faster temperature pull-down, and leak-tight safety. |
Commercial grocery retailers face strict legislative pressure to phase out HFCs. Our transcritical CO2 gas coolers manage heat dissipation effectively under varying ambient conditions. Designed with specialized fin spacing, they maximize heat transfer efficiency to lower annual operating costs.
In large distribution centers, safety and efficiency are the primary goals. Our heat exchangers are built with thick-walled seamless pipes and reinforced joints, providing stable operation in large industrial systems and peace of mind for facility operators.
R744 systems excel in heat recovery because of their temperature glide in transcritical operation. By using our CO2 gas coolers, industrial facilities can capture waste heat to produce high-temperature hot water, reducing overall energy demand.
Discover how our automated MES workshop and raw material quality control ensure consistent, high-precision manufacturing.
Our core production equipment is imported directly from Germany to ensure high precision in tube bending and fin punching. We employ a digital MES (Manufacturing Execution System) to monitor every stage of production in real time, guaranteeing full component traceability from raw material to finished product.
Raw Material Sourcing: To ensure high product durability, our core raw materials are sourced from top-tier suppliers. Our specialized ITO films and liquid crystal spacers are sourced directly from partners in Japan, and our industrial adhesives are imported from Europe to ensure long-term thermal stability.
We perform rigorous environmental and pressure testing to ensure maximum reliability:
Ensuring simple international shipping, complete regulatory alignment, and reliable after-sales engineering support.
Our cooling components comply with strict environmental policies worldwide. We hold ISO 9001, CE, and US UL certifications. Every component is designed to align with RoHS and REACH standards, allowing for hassle-free integration into systems worldwide.
Our technical team provides round-the-clock support to resolve engineering and operational issues. We maintain a 24-hour hotline with a guaranteed 8-hour response window, helping customers resolve critical system questions quickly.
We offer customized tube shapes, fin profiles, and mount designs to match your specific mechanical requirements. With a flexible starting MOQ of 500 units and quick prototyping, we support you from sample testing through to large-scale production.
Discover our highly requested industrial valves, installation hardware, and maintenance components.
Juntao Refrigeration: Your ISO 9001-Certified OEM/ODM Partner for Filters, Condensers, and Copper Fittings.
Ningbo Taojun Refrigeration (operating globally as Juntao Refrigeration) stands as a recognized leader in the design and production of critical refrigeration components. With our official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S), we maintain strict quality standards across all production lines.
Our certifications, registered via China's CNCA (www.cnca.gov.cn) and verified through partner Zhongci International (www.zcgirz.com), demonstrate our reliability for OEM and ODM clients worldwide. We are dedicated to providing stable, high-performance thermal solutions from our manufacturing facilities in Zhejiang, China.
Consult with experienced engineers. Get tailored technical feedback and detailed drawings within 8 hours.
Includes assistance with system setup, product training, a 1-year product warranty, and lifetime technical support.
Quality Certification
Verification Scope
Get technical answers to common questions about CO2 (R744) condensers, gas coolers, and procurement options.
Unlike standard systems that condense refrigerant at subcritical pressures, transcritical R744 systems operate above CO2's critical point (31.1°C / 73.8 bar). At these conditions, the gas cannot condense; instead, it is cooled at constant pressure. This requires a specialized gas cooler designed to handle high pressures (often up to 120-130 bar) and manage high temperature differences safely.
R744 systems operate at high working pressures. Standard copper tubing lacks the tensile strength to contain 120 bar safely without using thick walls, which can reduce heat transfer. Copper-iron alloys like K65 provide the necessary structural strength while keeping tube walls thin. Internal grooving creates turbulence in the flow, increasing the internal heat transfer coefficient to maximize efficiency.
We use automated precision welding lines alongside strict testing procedures. Every completed high-pressure condenser and filter drier undergoes helium mass spectrometer leak testing, which can detect tiny micro-leaks down to 1x10^-7 mbar·l/s. This helps ensure safe, long-term operation in transcritical systems.
Our standard MOQ for custom-configured filter driers, copper U-bend fittings, and finned tube condensers is 500 units. Depending on order complexity and requirements, standard manufacturing lead times range from 3 to 4 weeks. We also offer fast air shipping for urgent prototyping and testing phases.
Yes. Our heat exchangers are fully compatible with natural refrigerants like R744 (CO2) and R290 (propane), which have low or zero GWP. We design and build our components to help customers comply with current environmental regulations, including RoHS, REACH, and UL requirements.
Taojun