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Comparison and analysis of AC FFU and DC FFU in clean workshop

Views: 0     Author: Site Editor     Publish Time: 2020-08-25      Origin: Site

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FFUThe full name in English is: Fan Filter Unit, and the Chinese is the fan filter unit group. The FFU fan filter unit can be modularly connected and used. FFU is widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms and local 100-level applications. FFU is equipped with primary and high-efficiency two-stage filters. The fan sucks in air from the top of the FFU and filters it through primary and high-efficiency filters. The filtered clean air is sent out at a uniform speed of 0.45M/S±20% on the entire air outlet surface.

As the air filter unit, the FFU unit is divided into DC and AC. Generally speaking, the electronic factory that purchases and uses FFU in large quantities usually uses DC FFU, while the local laminar flow of pharmaceutical factories usually uses AC FFU. So what is the difference between these two FFUs themselves? Today we will discuss it together.

Comparative analysis of AC and DC FFU systems:

1. CommunicationFFU

Exchange FFU


AC electronic speed control

AC variable voltage speed regulation


Stepless speed regulation, continuous wind speed

Low noise, suitable for high-power fans


Loud noise, only suitable for low-power fans

Adjust the classification, the wind speed is not continuous

2. Direct currentFFU

Using a DC motor, the operating status of the fan can be centrally controlled and displayed through a computer equipped with control software.

3. Comparative analysis of AC FFU and DC FFU system

Exchange FFU


Suitable for FFU below 100 units

Suitable for more than 100 FFU

AC FFU system

DC FFU system

Motor mechanical efficiency is about 60%

Motor mechanical efficiency is about 80%

High heat loss

The heat loss is only 1/3 of the AC form

Small initial investment

The initial investment is relatively high and can be recovered within a few years

High energy consumption and high operating costs

Low energy consumption, low operating cost

Simple system and complex control

Complex system and simple control

Starting current is about 3 times of working current

Starting current is less than operating current

Low initial investment

High initial investment               Mobile: 13355281100
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