Integrating high-frequency Japanese microelectronics engineering with automated manufacturing to supply robust operational architectures for world-leading brands.
Osaka has historically stood as the epicentre of global HVAC innovation. As the birthplace of multi-split Variable Refrigerant Flow (VRF) technology and variable frequency inverter drive standards, the Osaka region sets the benchmarks for energy efficiency, electromagnetic compatibility (EMC), and microelectronic robustness. Global procurement departments recognize that sourcing controllers from architectures deeply aligned with Osaka's industrial cluster guarantees high reliability and strict compliance with the next generation of eco-efficiency regulations.
By leveraging technological advancements in microcontrollers (MCUs), high-frequency signal processing, and low-loss inverter switching, we bridge the gap between high-volume manufacturing economies and the stringent technical quality demands of the Japanese industrial market. Our materials, including high-grade liquid crystal spacers and thermal-resistant protective films, are sourced directly from Japan, matching the high-end hardware expectations of markets requiring extended lifetimes under severe environments.
Founded in 1988 as the Xiangshan Refrigeration Accessories Factory of Zhejiang University, Ningbo Taojun Refrigeration Equipment Co., Ltd. has developed over three decades into an industry-leading OEM/ODM manufacturer. In 2021, we were officially designated a National High-Tech Enterprise, acknowledging our focus on technological evolution and thermal process optimization.
Our comprehensive production facility integrates modern design, manufacturing, quality control, and international logistics. Through strategic collaboration with academic institutions and deep material imports from Japan, we supply high-quality HVAC/R elements to global brands including Haier, Midea, Gree, Whirlpool, Electrolux, and others. Operating under the renowned "Lingshan" and "Taojun" brands, our filter driers, check valves, and air conditioning controllers comply with the strictest regulatory frameworks: ISO9001:2015, EU RoHS, and US UL certifications.
In response to global decarbonization mandates and shift to low-GWP (Global Warming Potential) refrigerants, we are driving advanced control architectures to optimize system efficiencies.
Our electronic controllers utilize advanced vector control algorithm models. This decreases harmonic distortion in compressor motors and improves variable speed performance. By matching the output to actual load profiles, seasonal energy efficiency ratios (SEER) are improved by up to 35% compared to fixed-speed designs.
Integrating Modbus, BACnet, and wireless communication protocols (Matter, Zigbee), our controllers enable direct interface with modern building management systems (BMS). Features include predictive maintenance alerts, real-time power analytics, and diagnostic algorithms to prevent compressor short-cycling.
Optimized for transition-state refrigerants (including R32, R454B, and natural refrigerants like R290). Controls coordinate with pressure monitors and dual-gauge manifolds to regulate superheat ratios, avoiding liquid slugging and optimizing expansion valve performance.
To operate reliably in harsh environments, our air conditioning and refrigeration components must withstand severe thermal and physical stresses. We verify physical and electrical stability through standard testing processes:
Our partnership with Zhejiang University research departments ensures that our physical filtration technologies, including the "Lingshan" range, absorb system moisture and acids with high efficiency, protecting compressors from internal chemical corrosion.
From consumer cooling to massive industrial refrigeration, our products are engineered for continuous thermal management.
Supplying smart controllers, capillary valves, and filter driers for home split systems, multi-split VRFs, and heat pumps requiring energy efficiency and quiet operation.
High-pressure contactors, heavy-duty accumulators, and dual-gauge manifolds designed to handle commercial refrigeration loops for food preservation, logistics, and supermarkets.
Custom extruded copper drying filters and heavy-duty condenser fan motors meant for operating in extreme high-load and highly corrosive conditions.
Quality is verified through formal auditing. Ningbo Taojun Refrigeration is officially certified to GB/T19001-2016 / ISO9001:2015 standard (Registration No.: 41325Q00065R0S), covering the design, development, and manufacturing of refrigeration parts including filter driers, condensers, and access valves.
Verifiable via China's national database (CNCA) and certified by international auditing bodies, this quality system ensures that our products maintain performance standards for global distribution.
ISO 9001 Cert Doc
Scope Details
Common engineering questions regarding OEM/ODM integration, material quality, and compliance for international buyers.
Our inverter control systems employ configurable MCU firmware with space-vector pulse-width modulation (SVPWM) algorithms. By modifying drive parameters (including voltage/frequency curves, PID acceleration/deceleration coefficients, and motor inductance presets), our boards interface with commercial scroll and rotary compressors from brands such as Daikin, Panasonic, and Mitsubishi.
We use 100% molecular sieve desiccant (primarily type 3A) in our filter driers, offering a water adsorption capacity ≥20%. Type 3A molecular sieves exclude larger refrigerant molecules (like R134a or R410A) while selectively adsorbing moisture and acid, preventing moisture release that leads to capillary freezing and oil decomposition.
We maintain strict trace element control on all brass and copper components. Our extrusion and machining lines use lead-free or low-lead brass alloys complying with the RoHS directive. Our plastics, solder pastes, and electronic components undergo regular lab analysis to verify compliance with REACH substances of very high concern (SVHC).
Using Japanese ITO films ensures uniform electrical resistance and zero dimensional shrinkage under continuous high temperatures. The liquid crystal spacers prevent parallax distortion and cell-gap degradation, ensuring the controller display remains legible and functional under thermal loads up to 90°C.
Yes. Through our ODM program, we design custom board layouts, connector styles, and sensor brackets to fit existing physical footprints. Our CAD engineers create custom prototypes within 7 to 14 business days based on your unit chassis drawings.
Our electronics are subjected to high-frequency sweep vibration testing (covering 10 Hz to 150 Hz at 2G acceleration forces) across all three axes (X, Y, Z). This mimics real-world compressor vibrations, ensuring our double-sided reflow soldering remains intact without hairline cracking.
Our baseline MOQ for standard filtration parts and valves is 500 units, while custom PCB controller boards start at 200 units. Standard production runs take 21 to 30 days, and we offer 72-hour air freight shipping for urgent evaluation samples.
A comprehensive selection of capacitors, tubing, motors, and filters engineered for residential, commercial, and industrial HVAC applications.
Taojun