April 27–29, 2025 – The 36th China Refrigeration Expo grandly opens at the Shanghai New International Expo Center. ACOL Online Control Technology Co., Ltd., a leading domestic innovator in central air conditioning fluid control, unveiled its groundbreaking product lineup, including the WFM50 series vortex flow sensors and CT flat rectangular expansion tanks, under the theme "Precision Measurement + Sustainable Energy Savings."

WFM50 Vortex Flow Sensors

As a velocity-type flow meter based on the Kármán vortex street principle, the WFM50 measures volumetric flow rates of gases, steam, or liquids. Key features include:

• Low pressure loss and high accuracy

• Wide measurement range unaffected by fluid density, pressure, temperature, or viscosity

• No moving mechanical parts, ensuring minimal maintenance and long-term stability

• Cost-effective solution for high-precision flow measurement

"This product solves critical pain points in central air conditioning systems, such as high-pressure switch protection activation and heat exchanger freeze damage caused by low water flow," emphasized Zhang Yadong, General Manager of ACOL. "Real-time flow feedback enables intelligent compressor frequency adjustment, reducing failure rates by 60% and boosting overall energy efficiency by 15%."

CT Flat Rectangular Expansion Tanks

Designed for compact systems like wall-hung boilers and heat pumps, ACOL’s CT series features:

• Ultra-thin 60mm profile (40% space efficiency improvement, 60% installation depth reduction)

• Butyl rubber diaphragm tested over 500,000 cycles, withstanding 4bar pressure

• Long-life Gas Retention patented technology (no leakage even after valve core removal, 6–8 years maintenance cycle vs. traditional 1–2 years)

Future Vision
"Over the next three years, ACOL will invest heavily in smart fluid laboratories to become a global leader in HVAC control solutions," stated Zhang Yadong.

From bridging domestic technological gaps to setting international standards, ACOL is reshaping the fluid control landscape for central air conditioning. Driven by China’s dual-carbon strategy, this 25-year industry "hidden champion" is poised to lead HVAC control into an era of precision IoT-enabled innovation.