A blower with PWM function and technical support provide sufficient airflow and low noise.

The enhanced virus suppression function has increased ventilation resistance, and the current fan does not produce enough airflow.

In response to the spread of COVID-19, the introduction of air purifiers is becoming more widespread in various places. Air purifier manufacturer Company A has also begun developing a new product with enhanced virus suppression functions. However, during development, there were several issues with the fan installed inside the air purifier. Mr. B from Company A's Product Development Department explains:
"For the new model, we needed to add multiple layers of special filters to strengthen the virus suppression function. However, increasing the number of filters and increasing density increases the airflow resistance ^*1, and the current fan did not have enough static pressure to ensure sufficient airflow.
So we considered installing a fan with high static pressure, but then noise became an issue. Because air purifiers are used in close proximity to people, such as in hospitals, stores, and homes, it is necessary to keep fan noise to a minimum." (Mr. B)
To resolve the issues of strengthening virus suppression functionality and reducing noise, Mr. B was looking for a fan that could achieve both high static pressure and low noise.

*1 Ventilation resistance: The difficulty of air flowing inside the device. For more information, Knowledge Fan Basics: Ventilation Resistance of Equipment
For more information about noise, Knowledge Fan Basics: Fan Noise and Sound Pressure Levels

We offer high static pressure blowers that are ideal for equipment with high ventilation resistance.

Mr. B contacted a person at SANYO DENKI CO., LTD., the manufacturer of the fans that are installed in the current model of air purifiers, and discussed achieving both high static pressure and low noise levels.
After listening to Mr. B's detailed explanation of the issues, the SANYO DENKI CO., LTD. representative suggested the high static pressure blower "San Ace B97."
"We decided to consult with them again because they have a good reputation for their track record in past installations and their thorough support. The fans they proposed have one of the highest static pressures in the industry, and have a proven track record of ensuring sufficient airflow even in devices with high ventilation resistance, such as servers and storage. They also have unique designs on the blades and frame shape that achieve low noise levels along with high static pressure. What's more PWM control function makes it possible to control the rotation speed according to the situation, so we were able to expect even further noise reduction." (Mr. B)

Even after the official adoption, we provided support to reduce noise, achieving low noise levels while maintaining sufficient airflow.

Mr. B evaluated the "San Ace B97" and confirmed that it could ensure sufficient airflow even in an air purifier with multiple layers of filters that had high ventilation resistance. He officially decided to adopt it.
Furthermore, at the request of Mr. B and others from the Product Development Department, SANYO DENKI CO., LTD. continued to provide technical support for noise reduction.
"SANYO DENKI CO., LTD. Denki measured the noise level of the fan when it was running in their in-house anechoic chamber, and also suggested adding vibration-absorbing material to the fan mounting area. With this support, we were able to achieve a level of quietness that had never been seen before," said Mr. B.

Having successfully developed a new model of air purifier, Company A continues to use SANYO DENKI CO., LTD. fans as it continues to research products suited to the "with COVID-19" era.

For more information about blower fans, please also see "Features of Blower Fans."​

release date: 2021-02-15 00:00