Fan filter units (FFU) the development and application of FFU is FAN FILTER UNIT acronym, Chinese called "fan filter unit," that is, the fan and high efficiency filters or ultra-high efficiency filter together constitute itself can provide power the end of the purification equipment. HEPA filters used in the past in the decontamination of the band fan outlet, self-purification, laminar flow hood FFU are all one. FFU generally consists of the following four components: fans, filters, chassis, electrical control components. In the 1960s, the establishment of the first layer flow chamber has begun to appear on the application of the FFU. It was not until 1984, in the case of large-scale application of FFU to appear in Asia (about 5,000 units). What causes FFU in such a long time has not been widely development? There are three issues dominate. First: the noise problem. You can think about at the time of production technology level, 5000 Typhoon aircraft noise together would be? Second: the pressure balance. In a large static pressure box, each with a different corner of the fan is to get a balanced pressure, which is not guaranteed at the time. Third: maintenance issues. FFU air supply unit itself cost is relatively high, and if it can not guarantee the life of the motor, then the replacement will bring additional investment. These are caused by the time companies do not choose to use FFU of the main reasons. But all of this, in 1984 have changed. The first is the noise problem has been controlled, large-scale clean room FFU can control the noise below 65 decibels, which is in line with standard industrial plants. Secondly, with the development of automatic control, monitoring and adjusting all corners of the static pressure also becomes easier. Finally, with the improvement of the life of the motor technology has been a qualitative leap. Now, with the development of semiconductor electronic technology, more dense integrated circuit also requires an increasingly high level of clean room. Suzhou Science and Technology in the spring production of FFU jinghua.midspringpurify.cn take full advantage of its full functionality, in decontamination areas play an increasingly important role. First, flexibility. Because FFU laminar flow hood is self-powered, it is not restricted area. In the clean room where a huge, according to need, zoning control. Moreover, with the changes in the semiconductor manufacturing process, plant layout is bound to be adjusted accordingly, flexibility FFU make this adjustment easier, and will not bring secondary investment. Second, reusability. Theoretically, sometimes without the FFU equipment, can be removed, sealed, safekeeping, left the next use. Third, the negative pressure ventilation. This is a unique feature of FFU. Because it itself can provide static pressure so that the clean air plenum with respect to plant negative. Thus, the plenum of the particles on the role will not leak under pressure to clean areas where the seal has become very simple and safe. Fourth, reduce operating costs. While the selection of FFU, the initial investment than with high ventilation duct, but it is running late, outstanding performance energy-saving, maintenance-free characteristics. 40% reduction in operating costs with a large circulation. Suzhou Spring Purification Technology Co., Ltd. Suzhou Chun Technology 朱紫成 Purification Technology Co., Ltd. Sales www.midspringpurify.cn / jinghua.midspringpurify.cn Address: Wujiang District, Suzhou City, Zhongshan South Road, Building 612 Room 1729 collar