When a fan is running, the blades are rotating and it is dangerous to come into contact with them. Therefore, safety measures are required to prevent fingers or foreign objects from coming into contact with the rotating blades.
Among the various guard shapes, the finger guard is a product with a shape that provides safety measures while minimizing the reduction in fan airflow and the increase in noise.
In this article, we will explain the features of SANYO DENKI 's finger guards.
Safety measures to prevent fingers or foreign objects from coming into contact with the rotating fan blades include finger guards as well as guards such as slits or punched holes in the sheet metal.
Finger guard
5mm wide concentric holes
φ5mm punch hole
4mm slits
Many people may think, "Aren't they all the same as long as the air flows through them?" However, the shape of the guard is an important factor that affects the cooling and performance of the entire device.
The diagram and table below show the difference in maximum airflow and noise level depending on the guard shape.
You can see that the shape of the guard affects the amount of airflow and noise. The smaller the opening area of the guard, the greater the ventilation resistance, which tends to reduce the airflow and increase noise.
If the guard shape has a small opening area, which means high ventilation resistance, even if you have calculated the required air volume and selected a fan, installing the guard may result in reduced cooling performance or unexpectedly louder noise.
Furthermore, increasing the fan speed to compensate for the lack of airflow not only increases noise but also increases power consumption.
By using the finger guard, you can ensure safety while minimizing the reduction in fan airflow and the increase in noise.
As mentioned above, finger guards prevent fingers and foreign objects from getting in, but this function is impaired if the welding peels off. Furthermore, if the plating peels off, foreign objects may get inside the device and adhere to the electronic circuits, causing malfunctions. Scratches and dirt on the finger guards also affect the texture of the device.
At SANYO DENKI, we strive to manufacture high-quality, highly reliable products by regularly updating our jigs and conducting process inspections, visual inspections, and quantity inspections.
SANYO DENKI offers a lineup of three types of finger guards that can be selected to suit a variety of environments and appearances.
Cathodic electrodeposition coating offers superior corrosion resistance and rust prevention compared to nickel chrome plating. For Splash Proof Fan, cathodic electrodeposition coating finger guards or resin finger guards are recommended.
Finger guards are important products that not only serve as a safety measure, but also affect the fan's airflow performance, noise level, and even the appearance of the equipment. To maximize the performance of your equipment, consider using SANYO DENKI 's high-quality finger guards.
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