Fans come in a variety of types, each suited for specific applications in our daily lives. COOLING offers an extensive range of fans, and understanding their differences can help highlight their unique features.

Differences in Driving Power

The first distinction lies in the power source. AC fans run on alternating current (AC) from an electrical outlet, while DC fans are powered by direct current (DC). The speed of AC fans is determined by the frequency of the AC supply, whereas DC fans allow for adjustable speeds, controlled by both the motor and the circuit.

Currently, DC fans are the more common choice due to their ease of control and wide availability in various forms.

Another type is the EC fan, which can operate on both AC and DC power. These fans include a mechanism that converts AC power into DC, enabling them to function in the same manner as DC fans, even when powered by AC.

Axial Fans: Recognizable by Shape

Axial fans are the most commonly used type of fan, characterized by their straightforward design. They feature an impeller positioned at the core of the frame, which draws in air and expels it along the same axis as the rotating shaft. This type of fan is likely the one that comes to mind when you think of a “fan.” Found in many everyday applications, axial fans are known for their high airflow and low noise levels.

There are several variations of axial fans:

• Counter-Rotating Fans: These fans consist of two impellers connected in series, rotating in opposite directions. This configuration increases static pressure and improves airflow straightness.
• Durability Fans: Built to endure extreme environments, these fans are ideal for conditions that are either very hot or very cold.
• Reversible Flow Fans: These fans allow for reversible blade rotation, enabling airflow in both directions.

Each of these types can be selected based on your specific needs.

Blowers and Centrifugal Fans: A Different Approach

In contrast to axial fans, blowers and centrifugal fans pull air in from the inlet and then change the direction of airflow by 90 degrees before expelling it.

Blowers and centrifugal fans are ideal when space constraints prevent the exhaust from going in a straight line. Blowers are especially suited for localized cooling, where high static pressure ensures precise airflow for internal cooling of densely packed components. Similarly, centrifugal fans are perfect for exhausting air from equipment with high-density component configurations.

 

风扇种类：按驱动机制和形状分类

风扇有多种类型，每种风扇都适用于我们日常生活中的特定应用。COOLING 提供了丰富的风扇选择，了解它们的区别有助于突出各自的独特特点。

驱动功率的差异

首先的区别在于电源。交流（AC）风扇通过电源插座提供交流电（AC）驱动，而直流（DC）风扇则由直流电（DC）提供动力。交流风扇的转速由交流电源的频率决定，而直流风扇则允许调节转速，通过电机和电路控制。

目前，由于直流风扇易于控制且在各种形式中都有广泛的应用，它们已成为更常见的选择。

另一种类型是EC风扇，既可以使用交流电也可以使用直流电。这些风扇包含一种机制，可以将交流电转换为直流电，使其即便在交流电源驱动下也能像直流风扇一样工作。

轴流风扇：通过形状辨识

轴流风扇是最常见的风扇类型，其特点是设计简单。风扇的叶轮位于框架的核心，通过该叶轮吸入空气并沿着与旋转轴相同的轴线排出。这个类型的风扇通常是你想到“风扇”时的典型样式。轴流风扇在许多日常应用中得到广泛使用，因其高风量和低噪音而著称。

轴流风扇有几种不同的变体：

• 反转旋转风扇：这种风扇由两个叶轮组成，它们连接在一起，反向旋转。此配置增加了静压，并改善了气流的直线性。
• 耐用风扇：这些风扇设计用于应对极端环境，适合在极热或极冷的条件下使用。
• 可逆流向风扇：这种风扇可以使叶片反转，从而实现双向气流。

根据不同的需求，可以选择这些不同类型的风扇。

鼓风机和离心风扇：不同的工作方式

与轴流风扇不同，鼓风机和离心风扇通过进气口吸入空气后，将气流方向改变 90 度，再排出空气。

当空间限制导致排气无法直线排出时，鼓风机和离心风扇非常适用。鼓风机尤其适合用于局部冷却，高静压确保对密集组件的内部冷却提供精确气流。同样，离心风扇非常适合用于排放来自高密度组件配置设备的空气。