Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. began its journey as the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over three decades of technology refinement, we have evolved into a comprehensive high-tech enterprise integrating R&D, advanced manufacturing, and global supply chains for refrigeration components.
Located in Xiangshan, Ningbo, our facilities span advanced production blocks utilizing intelligent systems like the MES workshop management system. Our flagship product lines, distributed under the renowned "Lingshan" and "Taojun" brands, include copper filter driers, check valves, air conditioning valves, copper-iron alloy condensers, and high-performance HVAC accessories.
The phasing down of high Global Warming Potential (GWP) fluorinated gases (HFCs) under the Kigali Amendment and the stringent EU F-Gas Regulation has driven the refrigeration industry toward natural alternatives. R744 (Carbon Dioxide) features a GWP of 1 and an Ozone Depletion Potential (ODP) of 0, making it the global standard for green commercial and industrial thermal cycles.
Unlike conventional systems, CO2 systems operate at exceptionally high working pressures. In transcritical systems, pressure levels regularly exceed 120 bar, with temperatures surpassing 100°C at the compressor discharge. This demands highly specialized heat exchangers—gas coolers and condensers—engineered to handle intense thermal shocks and high burst pressures.
In subcritical cascade refrigeration systems, CO2 functions on the low-temperature side, operating below the critical point (31.1°C, 73.8 bar) with condensing temperatures ranging from -10°C to -25°C. In transcritical systems, heat rejection occurs above the critical point where phase change does not exist, requiring a dedicated gas cooler instead of a traditional condenser. Manufacturers must employ materials like K65 copper-iron alloy or heavy-wall 316L stainless steel to guarantee structural integrity.
Transitioning from traditional fin-and-tube setups to flat multi-port extruded aluminum microchannel tubes dramatically increases heat transfer efficiency while reducing the total refrigerant charge by up to 40%. The flat profile lowers air-side pressure drop, enhancing fan efficiency.
K65 alloy allows manufacturers to produce thin-walled tubing capable of withstanding operating pressures above 120 bar. This material optimizes heat exchange thermal conductivity while reducing structural weight compared to stainless steel alternatives.
To resist corrosive environments (coastal areas, industrial settings), hydrophilic and anti-corrosive coatings (e.g., epoxy, polyurethanes, silane-based coatings) are applied. This guarantees a design lifespan exceeding 15 years under harsh operating conditions.
Our commitment to reliability is demonstrated through advanced manufacturing equipment imported directly from Germany and raw materials sourced globally from Japan and Europe. At Taojun, we utilize a comprehensive 5D Quality System to verify every stage of production:
Transcritical CO2 booster systems are standard in modern European and North American supermarkets. Taojun's heavy-duty gas coolers and copper filter driers absorb moisture and acid, preventing ice blockages in high-pressure expansion valves and optimizing COP.
In subcritical cascade refrigeration, low temperatures are reached safely. Our copper filter driers, designed with 3A molecular sieves, maintain a moisture-free loop, preventing the formation of corrosive carbonic acid inside the R744 stream.
High-efficiency heat rejection makes CO2 ideal for domestic hot water heat pumps. With water inlet temperatures around 10-15°C, our gas coolers facilitate heat exchange, yielding hot water up to 90°C efficiently.
Taojun Refrigeration operates in compliance with international quality and environmental directives. Our official certification (Registration No.: 41325Q00065R0S) guarantees complete traceability and compliance with global standards.
Main ISO 9001 Certificate
Detailed Scope of Certification
UL & RoHS Compliance Documents
To verify our active certificates, visit the official China CNCA database at www.cnca.gov.cn or check with our partner registration audit body at www.zcgirz.com.
Adhering to integrity management, quality utmost, and transparent material specifications. Honesty is the foundation of our competitive edge.
Our engineers make continuous innovations in technology, mechanism, and process design to address evolving natural refrigerant challenges.
We maintain a strong sense of mission to reduce the carbon footprint of commercial refrigeration equipment worldwide through high-performance designs.
We build long-term win-win partnerships with global brands, integrating resources to optimize regional logistics and local distribution networks.
Taojun