Oil-Free Inverter Centrifugal Chiller Air Suspension Technology for Ultimate Efficiency

Oil-Free Inverter Centrifugal Chiller Air Suspension Technology for Ultimate Efficiency

Energy-Saving and Oil-Free
● Air Suspension Technology
Wotech's new generation of high-efficiency air bearing centrifugal chillers adopts highly reliabledynamic air foil bearing technology. The use of aerospace-grade aluminum alloy materials andprocesses provides higher reliability and temperature resistance.
● Advanced Compressor

Dynamic air foil bearings

No need for lubricating oil or auxiliary equipment

Instant startup at ultra-high rotational speeds

Compact structure
Over 2 million start-stop life cycles

No efficiency loss from circulation system

High control precision
● Oil-Free Lubrication System
No need for oil-ubricated bearings or lubrication systems. The design is simpler andeliminates long-term efficiency loss caused by oil system degradation.
● Permanent Magnet Synchronous Motor Technology

High-Speed Permanent Magnet Synchronous Motor
High power density, compact size, lightweight structure, high motor efficiency; motor efficiency reaches up to 99% within full operating range

Uniform temperature distribution and eficient cooling; motor temperature is controlled at around 40'C, ensuring safeand efficient operation
Uses low-loss silicon steel cores and high-performance rare earth permanent magnets for high motor eficiency andlow total power loss

Employs Space Vector Pulse Width Modulation ($VPWM) for speed regulation and control; automatically adapts toload changes with high precision, low starting current, low operating current, and low lifetime energy and distribution cost

Stable & Reliable

Self-developed core technologies and components ensure long-term reliable operationunder various harsh conditions
● Aerospace-Grade Materials
Critical components use aerospace-grade alloy materials, ensuring long-term structuralstability and safety under extreme conditions.

● Precision Control System

The electrical control system offers full automation, ensuring efficient and secure unit operation. Real-time monitoring and remote access allow for unmanned and worry-free operation.

● Inverter Control Technology

Built in IGBT (Insulated Gate Bipolar Transistor) is an inverter that can convert the input DC voltage into adjustable three-phase AC voltage. The signals from the motor and bearing controller determine the input frequency, voltage, and phase of the inverter, and adjust the motor speed accordingly to meet the on-site load requirements.

● Anti-Vibration Design for Compressor

Effectively dampens vibration at the compressor base and bearings, enhancing system stability and durability.

● Extended Operating Life

Between Nov. 1, 2021, and May 31, 2022, reliability testing of the centrifugal air bearing compressor showed a startup and shutdown cycle count of 5.57 million times, confirming excellent durability.

Wide operating Range
Multiple core technologiecross a wide operating range.ensure relane nerormance a0The unit supports frequent start/stop operations while maintaining oil-free operation time of over 90% andrefrigerant content fluctuation within 10%
● Multi-Technology Coordinated Control

Wotech’s new-generation control system integrates multiple control modes, using intelligent adaptive control logic and advanced load distribution algorithms to achieve coordinated operation of multiple compressors.

The advanced GV (Guide Vane) technology enhances system efficiency across various loads, keeping deviation within 10% during unit start and shutdown.

• Under 10% load: unit can operate stably
• 15% load: high efficiency
• 50% load: optimized performance
• 100% load: full capacity and stability

In complex environments, the intelligent system maintains high-efficiency and oil-free operation.

● Low Ambient Temperature Operating Technology
Supports low-temperature startup and stable operation down to -20°C ambient temperature.The advanced vapor injection and adaptive defrost control strategies enable reliable unit operatioreven under bu'o humldlty and uitra-ow amblent condlons, makina it sultable tor data centerslaboratories, electronics workshops, and other precision-controlled environments.
● Comprehensive industrial level safety design
The unit integrates multiple protection features including electronic expaion valves, temperatureand pressure sensors,smart controlboards, and complete fault diaanosis odicables fault isolation and automatic alarms to ensure equipment safety and long-term stableoeratic

Specifications

Guangdong Wotech Renewable Energy & Technology Co., Ltd.(hereinafter referred to as Wotech) was founded in 2005, integrating research and development, manufacturing, marketing, and after-sales service of heat pumps.

At present, Wotech has three production bases in Shunde, Zhaoqing and Heyuan, Covering covering 25, 000 square meters. With state-of-the-art automated production lines, and a modern and spacious office complex with its very own testing laboratories, making Wotech one of the most advanced air source heat pump suppliers in China. Through comprehensive planning and persistent study over the past 20 years, Wotech is awarded as one of the top 10 heat pump leading brands in China and the top 10 Chinese exporters to more than 60 countries overseas.

Wotech has a perfect process in customer service and pays excellent attention to details. Wotech is specialized in OEM/ODM projects, designing tailored air source heat pump products for various high-end markets. Moreover, in order to satisfy more and more complex and demanding markets, customized solutions for residential and commercial swimming pool heating, house heating/cooling, and hot water combined systems can be made to our partners for intelligent applications.

Wotech, with many years of heat pump export experience, sets up a top international quality control system to achieve the belief of making the best quality heat pumps for global users.
 

FOSHAN SHUNDE HUAMING RENEWABLE ENERGY&TECHNOLOGY CO.,LTD. (hereinafter referred to as DUHM) is a subsidiary of Wotech, which was founded in 2011.

In 2015, Wotech completed shareholding reform and became the 1st heat pump public company in 2016, with stock code 835751.

In 2019, Wotech laboratory is accredited CNAS (China National Accreditation Service for Conformity Assessment) and awarded as the "Leading Brand of Heat Pump" by the Chinese Heat Pump Association.

In 2022, Wotech is Certified for PED ( The Pressure Equipment Directive, ESRs), which is compulsory certification for heat pumps in EU market.

We leverage renewable energy and cutting-edge intelligent technologies to deliver efficient solutions, working towards a sustainable future for all.