What is the fan air volume?
Fan blowing should not be too large. According to modern science, indoor wind speed should be controlled at 0.2 ~ 0.5m/s, and should not exceed 3m/s directly. So don't blow the electric fan too loudly, especially in places where there is through flow and it is easy to blow. Don't blow too close. Appropriate distance should make people feel cool and comfortable. After blowing for a period of time, it is necessary to change the position of the electric fan, or change the direction of the human body, to avoid one side being cold for too long, and let the electric fan blow against the ceiling or a corner.
Choose an electric fan with small side effects. For example, the ceiling fan is soft and uniform; Another example is the louver fan, because its air supply angle is three-dimensional, and the airflow is soft, similar to natural gust. There is also an electric fan with breeze characteristics, which can reduce the slow speed of the electric fan from the usual 700 ~ 800 rpm to 450 ~ 500 rpm, thus obtaining the characteristics similar to natural breeze.
What should I pay attention to when buying a fan?
1. Whether the control mechanism is flexible, including speed control switch, timing knob, rocking switch, lighting switch, etc. These control mechanisms should be flexible in operation and reliable in contact. For speed regulating gear, two gears are not allowed to be connected at the same time or one gear cannot be pressed down. Press the stop key, and all speed keys should be reset normally.
2, the performance of moving parts, the fan head of the electric fan can run flexibly at all angles and can be locked firmly. When adjusted to the angle of depression or the position of shaking the head, the net cover should not collide with the fan strut. When the fan is running, it has good stability, will not topple, and the shaking angle shall not be less than 60-80 degrees.
3. Random files. The accompanying documents of each electric fan include instruction manual, product certificate, circuit diagram and packing list. Check the quantity and quality of spare parts according to the packing list when purchasing.
4. Whether the mesh cover and the fan blades are obviously deformed, use a pen to move the fan blades slowly at a fan blade point on the assembled fan mesh cover, and the corresponding points of other fan blades should be very close to the pen tip, then rotate the fan blades to see if the rotation is light and flexible and can stop at any position.
5. Starting performance Starting performance is an important quality index of electric fans. During the inspection, the electric fan should be set at a low speed. When the rated voltage of the power supply is 85%, that is, when the voltage of 220 volts drops to 187 volts through the voltage regulator, the electric fan should be started. The electric fan should be able to start from a static state and run normally. The shorter the time required for the electric fan to start normal operation, the better the starting performance of the fan motor.
6. Operation and speed regulation performance. Turn the rocker switch back and forth several times after power-on, and check whether it fails or is too tightly assembled. In this process, there should be no abnormal noise in the mechanical transmission part of the fan. When the electric fan is running at high, medium and low speed, the larger the air supply angle, the better. When the electric fan stops running, the axial clearance of the rotating shaft should not exceed 0.5cm. Excessive clearance will cause axial movement and impact sound during operation.
In short, fans, like air conditioners, are an effective helper for people to cool down in summer. I hope that the above knowledge about the fan air volume and what matters need to be paid attention to when buying a fan can be summarized for everyone. We should know that fans of different brands, sizes and air volumes are different, so we should choose them according to actual needs, so I hope this article can bring some help to friends in need!