The full English name of FFU is (Fan Filter Unit), and the corresponding professional term in Chinese is Fan Filter Unit (unit).
FFU can be modularly connected and used, and is widely applied in clean rooms, clean workstations, clean production lines, assembly clean rooms, and hundreds of other application scenarios.

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 the primary and high-efficiency filters. The filtered clean air is sent out at a uniform speed of 0.45M/S ± 20% throughout the outflow surface. It is suitable for obtaining high-end other clean environments in various environments. It provides high-quality clean air for clean rooms and different-sized and different cleanliness-level micro-environments. In new clean rooms and clean workshop renovations, it can improve cleanliness, reduce noise and vibration, and also significantly reduce costs. The equipment maintenance is convenient, making it an ideal component for cleaning and hygiene. A clean environment is provided by a large area. Most of it is used for 100-level or higher cleanliness. Usually, the floor method requires high-rise floors with return air ducts and should ensure a lower cleanliness level near this level. It is more expensive.

Ultrasonic Hood
The ultrasonic hood is an air purification device that can provide a part of the high-clean environment. It is mainly composed of cabinets, fans, primary air filters, shock-absorbing layers, lights, etc., and the shell is sprayed with plastic. This product can be hung and supported on the ground, with a compact structure and convenient use. It can be used alone or multiple times to form a strip of clean areas. The ultrasonic hood makes the air pass through the high-efficiency filter at a certain wind speed, forming a uniform layer, allowing the clean air to flow in a unidirectional manner, and ensuring the required cleanliness during the process. The working area. There are two types of clean ultrasonic hoods, which are installed inside the fan and connected to the fan from the outside. The equipment method is suspended and floor-mounted. The ultrasonic hood passes air through the high-efficiency air filter by the fan under a certain wind pressure and balances the pressure through the damping layer. Clean air is sent into the operation area in a straight laminar flow mode, ensuring that the operation area reaches the required high cleanliness during the process.

Compared with clean rooms, ultrasonic hoods have the advantages of low investment, quick effect, low factory construction requirements, convenient equipment, and energy saving. Currently, they are widely used in precision machinery, electronics, pharmaceuticals, food, and fine chemicals.

This structure is more chaotic than FFU. It is a part of the purification equipment, with lower environmental conditions. It is used to provide higher cleanliness for parts, suitable for renovation projects, and the overall requirements are not very high, but only meet partial requirements. It can be used alone or in parallel over a large area.