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Review of the working principle of ordinary FFU
Review of the working principle of ordinary FFU1. The airflow path of ordinary FFU.The working principle of ordinary FFU mainly depends on the fan and filter. First, the FFU fan sucks air from the top, and the airflow path is generally sucked from the indoor environment to the inside of the FFU device. Taking the common FFU as an example, its fan is usually responsible for generating airflow and sucking the surrounding air into the device through the air inlet. According to the searched materials, the appearance of FFU has two shapes: rectangular and sloped. The rectangular FFU generally relies on other ways to balance the airflow. At the same time, the sloped FFU plays the role of guiding, which is conducive to the flow and uniform distribution of airflow. The inhaled air flows through a specific channel inside the device to prepare for the subsequent filtering process. 2. How does ordinary FFU achieve air filtration? After the air is sucked into the FFU, it will be filtered through two stages: the primary filter and the high-efficiency filter. The primary filter is usually located at the air inlet and can filter out larger dust particles, debris, etc. The material mentioned that the core components of FFU include a motor, HEPA filter, and housing. The HEPA filter is the most important part, as it can filter fine particles, such as PM2.5 of haze, smoke from family members smoking, and some pathogenic bacteria particles larger than 0.3 microns. The filtering effect is significant, and the dust particles of 0.3 microns can reach 99.99%-99.999%. The clean air after two-stage filtration is sent out at a uniform speed of 0.45m/s±20% on the entire air outlet surface, providing high-quality clean air for clean rooms and microenvironments of different sizes and cleanliness levels. In this process, FFU purifies indoor air through continuous circulation through continuous operation, ensuring that the indoor environment always maintains a high level of cleanliness. |
