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How is the cooling fan designed?

How is the cooling fan designed?

Many people know how to use the cooling fan. We have also popularized the fault handling and reasons of the fan fan and how to extend its life. So today we will introduce how it is designed.
step one:
The design of the cooling fan first measures the relationship between the air volume and the wind pressure. It is very difficult to measure the characteristics of the air flow. At present, there are two ways to measure the static pressure and the air volume, one for the wind tunnel test and the other for the double box mode. The air volume and static pressure characteristics are measured in a two-box mode. The double-box variable exhaust system extracts air to adjust the air density. Instantly opening the nozzle will cause instantaneous changes in static pressure and air volume, and then read each static pressure. The pressure reading on the meter.
Static pressure is a function of air volume as a function of standard atmosphere and fixed operating voltage and frequency. The static efficiency of the cooling fan is equal to the volume of the air volume multiplied by the static pressure divided by the input electrical energy. The cooling fan is composed of a motor, a fan blade and an outer frame, so its efficiency includes the motor efficiency of the motor, and the air flow efficiency of the blade and the outer frame.
Step two:
All system impedance/system characteristic curve of the cooling fan When the air flows, the airflow will encounter the internal parts of the system in its flow path, and its impedance will restrict the free flow of air. The change in pressure is the measured static pressure, expressed in inches of water. In order to confirm the cooling wattage of each tank row, the system design or manufacturer must not only have an effective fan characteristic curve of the cooling fan to determine its maximum air volume, but also must know the wind resistance curve of the system. Parts inside the system can cause a loss of wind pressure. This loss varies due to the amount of wind, the so-called system impedance.
In addition, the intersection of the system operating point system characteristics of the cooling fan and the fan characteristic curve is called the system operating operating point, which is the optimal operating point of the cooling fan. At the operating point, the slope of the cooling fan is minimized, and the rate of change of the system characteristic curve is the lowest. Note that the static efficiency (air volume × wind pressure, power consumption) of the cooling fan at this time is optimized.
In addition, we must also pay attention to keep the air flow as unobstructed as possible. The air inlet and outlet are kept clear, and the airflow from the cooling fan passes through the system vertically to ensure smooth airflow and improve cooling efficiency.
Founded in 2005 in Shenzhen, China, Shenzhen Jiangshanlai Electronic Technology Co., Ltd. specializes in DC brushless motor, DC cooling fan, DC brushless fan, DC bracket fan, supercharged cooling fan, micro cooling fan, DC cooling fan. , DC blower, and non-standard fan customization, research and development, manufacturing, sales, service in one of the large enterprises, DC fan wholesale manufacturers, DC fan suppliers. Products sell well in North America, Europe, South Korea, Japan and other places.