山洋散热风扇主要分为：直流风扇和交流风扇两大类型，这两种风扇的区别主要表现在以下三个方面：

　　Shanyang cooling fans are mainly divided into two types: DC fans and AC fans. The differences between the two fans are mainly reflected in the following three aspects:

　　直流和交流风扇对比图

　　1.原理不同：

　　1. Different principles:

　　交流散热风扇的电源为交流，电源电压会正弦性交替变化，然而直流风扇电源电压固定，必须依赖电路控制，使两组线圈轮流工作才能产生不同磁场。交流风扇因电源频率固定，所以硅钢片产生的磁极变化速度，由电源频率决定，频率愈高磁场切换速度愈快，理论上转速会愈快，就像直流风扇极数愈多转速愈快的原理一样。不过，频率也不能太快，太快将造成激活困难。我们电脑散热器上应用的都是直流风扇。而一般一款好的散热风扇主要考察风量、转速、噪音、使用寿命长短、采用何种结构类型的扇叶轴承等。

　　The power supply of the AC cooling fan is AC, and the power supply voltage will change sinusoidally. However, the power supply voltage of the DC fan is fixed, which must be controlled by the circuit to make the two groups of coils work in turn to produce different magnetic fields. Because the power frequency of the AC fan is fixed, the change speed of the magnetic pole generated by the silicon steel sheet is determined by the power frequency. The higher the frequency, the faster the magnetic field switching speed, and the faster the speed in theory, just like the principle that the more poles of the DC fan, the faster the speed. However, the frequency should not be too fast, too fast will make it difficult to activate. DC fans are used on our computer radiators. Generally, a good cooling fan mainly investigates the air volume, speed, noise, service life, and the type of fan blade bearing used.

　　2.风量不同：

　　2. Different air volume:

　　同一规格尺寸的散热风扇，因交流风扇的马达体积大，扇叶短而直流风扇刚好相反，扇叶长马达小，所以单位面积内带动的风流量多，风量更大，散热能力更好。

　　For the cooling fan of the same specification and size, because the motor volume of AC fan is large and the fan blade is short, while that of DC fan is just the opposite, the fan blade is long and the motor is small, so the air flow driven per unit area is large, the air volume is larger and the heat dissipation capacity is better.

　　3.材料不同：

　　3. Different materials:

　　交流风扇外框一般是铝框，而直流风扇的外框是塑胶框，耐高温的能力不一样，选择直流还是交流风扇要看在同样成本的条件下哪款产品更匹配自己的产品。

　　The outer frame of AC fan is generally aluminum frame, while the outer frame of DC fan is plastic frame, which has different high temperature resistance. The choice of DC or AC fan depends on which product is more suitable for your own product at the same cost.

　　山东红宝电气有限公司与山洋品牌达成了长期的战略合伙伙伴关系，提供的山洋风机类型有：直流风扇、交流风扇、鼓风机、防水/防尘风扇、对转风机、防水离心风机、防油风扇、长寿命风扇、耐热风扇、离心风扇等，规格型号近万种，已广泛应用于：通讯设备、UPS电源、医疗器械、电焊机、工控设备、家用电器、空气净化行业、汽车行业等行业领域。

　　Shandong Hongbao Electric Co., Ltd. has reached a long-term strategic partnership with Shanyang brand. The types of Shanyang fans provided include DC fan, AC fan, blower, waterproof / dustproof fan, counter rotating fan, waterproof centrifugal fan, oil proof fan, long-life fan, heat-resistant fan and centrifugal fan. There are nearly 10000 specifications and models, which have been widely used in communication equipment UPS power supply, medical devices, electric welding machines, industrial control equipment, household appliances, air purification industry, automobile industry and other industries.