What are the differences between detachable fu and DC ffu

There are many differences between the detachable FFU and the DC FFU, as follows:
Design structure and characteristics
Detachable FFU The main feature is that the fan and the high-efficiency filter adopt a detachable design. By setting a high-efficiency filter installation frame at the bottom of the FFU box, the high-efficiency filter is fixedly installed inside the frame. The filter can be easily removed from the bottom by removing the screws, which is convenient for maintenance and replacement. There is no need to disassemble and assemble the FFU box. It is particularly suitable for occasions with high maintenance requirements for clean rooms and frequent replacement of filters, such as GMP clean workshops in pharmaceutical factories.
DC FFU: Structurally similar to a common FFU, it usually combines a fan and a filter to form a self-powered terminal purification device. Its uniqueness lies in adopting DC motors, which have better performance and feature small-size, lightweight, and compact structures. In addition, the box and high-efficiency filters of some DC FFUs also adopt a split design, making the installation and replacement of high-efficiency filters more convenient.
Motors and performance
Detachable FFU: It usually adopts a high-efficiency AC centrifugal fan. The characteristic of AC motors is that the initial investment is relatively low, but the later maintenance cost and energy consumption are relatively high. Its speed regulation methods may be AC electronic or AC variable voltage speed regulation. Although AC electronic speed regulation can achieve step-less speed regulation, it has high noise and is only suitable for small-power fans. The AC variable voltage speed regulation has low noise and is suitable for high-power fans, but the regulation is staged and the wind speed is not continuous.
DC FFU: It adopts DC motors and has significant advantages in terms of energy efficiency, noise control, speed regulation accuracy, and service life. It can achieve precise wind speed regulation through an intelligent control system, meeting the fine requirements of different working environments. It can be steplessly speed-regulated and the wind speed is uniform. The FFU driven by a DC motor has lower noise, longer working time, and less vibration.
Energy Consumption and Cost
Detachable FFU: Due to the use of AC motors, its power is relatively large and its average energy consumption is relatively high. For example, the average power of the traditional AC motor FFU is 150W - 190W±5W, and the average energy consumption is 170W. During long-term operation, the electricity cost is relatively high, and the maintenance cost of AC motors is also relatively high, such as the need to replace components like brushes regularly.
DC FFU: The power of a DC FFU is generally 85W - 135W, with an average energy consumption of 110W, which is significantly lower than that of an AC FFU. Although the initial investment in DC FFU is relatively high, due to its low energy consumption, it can save a large amount of electricity for long-term use and has a relatively low overall operating cost.
Application scenarios
Detachable FFU: It is suitable for places with high requirements for the convenience of cleanroom maintenance. Besides GMP clean workshops in pharmaceutical factories, it is also widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms, and local 100-level clean rooms, etc. It has advantages in some environments where high air quality is required but maintenance work needs to be carried out efficiently.
DC FFU: It is mainly used in places with extremely high requirements for air quality and where precise control of wind speed and energy consumption is needed, such as manufacturers of semiconductors, electronics, flat panel displays, and disk drives, as well as optical and biological industries where strict control of air pollution is required, and in laboratories, clean rooms and other environments.