Improvement Case 2 [Office Building] Stopping the Cooling Fan Belt Noise

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last updated：Oct 06, 2014

八紘テクノ

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Gentle acceleration is achieved by the inverter, eliminating belt squeal at startup and extending lifespan.

When the cooling fan starts, the belt that drives it slips, causing a squeaking noise as it rubs against the pulley. Due to its installation on the rooftop, complaints have arisen from nearby apartments. Because the fan turns on and off dozens of times a day depending on the set temperature, there have been many complaints, and the belt has also experienced significant wear. This issue has been improved by implementing gentle acceleration through an inverter, which eliminates the belt squeak and extends its lifespan. 【Features】 ○ Control method: Gentle acceleration operation using an inverter ○ Target equipment: Cooling fan (for air-cooled heat pump chiller) (5.5kW × 2 units) For more details, please contact us or download the catalog.

Related Link - http://www.hakko-techno.co.jp/case/improvement/imp…

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【Issues】 ○ The belt that drives the cooling fan slips upon startup, causing a squeaking noise as it rubs against the pulley. ○ Complaints have arisen from nearby apartments due to the rooftop installation. ○ The fan turns on and off dozens of times a day based on the set temperature, leading to numerous complaints and significant belt wear. 【Improvement Measures】 ○ Implement gradual acceleration using an inverter to eliminate belt squeaking and extend its lifespan. 【Results of Implementation】 ○ The belt squeaking has stopped, and complaints from the neighborhood have been resolved. ○ Successful extension of the belt's lifespan. ○ Successful reduction in electricity costs. ● For more details, please contact us or download the catalog.