公开(公告)号：US06364923B1

公开(公告)日：2002-04-02

申请号：US09616419

申请日：2000-07-14

申请人： Stanley G. Wiedmeyer ,  Arthur A. Frigo ,  Daniel Preuss ,  Edward F. Bielick ,  Richard F. Malecha

发明人： Stanley G. Wiedmeyer ,  Arthur A. Frigo ,  Daniel Preuss ,  Edward F. Bielick ,  Richard F. Malecha

IPC分类号： B01D5000

CPC分类号： B01D46/2411 ,  B01D46/008 ,  B01D46/0091 ,  B01D46/0098 ,  Y10S55/18 ,  Y10S55/46

摘要： A method and apparatus are provided for the replacement of contaminated HEPA filters without contamination of the surrounding environment. A filter housing is generally cylindrical and defines a filter receiving cavity. The filter housing having a filter receiving end and a filter removing end. An active HEPA filter is received within the filter housing cavity and is located near the filter removing end. A backup HEPA filter is received within the filter housing cavity and is located near the filter receiving end. A change-out bag is received within the filter housing cavity and is located adjacent to the filter removing end. The filter housing includes a gas flow path through the active HEPA filter without passing through the backup HEPA filter. For the replacement of contaminated HEPA filter, end covers are removed from the filter receiving end and the filter removing end of the filter housing and the change-out bag is opened. The backup HEPA filter is pushed into position of the active HEPA filter, thereby moving the active contaminated HEPA filter into the change-out bag during filter replacement. The change-out bag is sealed to isolate the HEPA filter for disposal.

摘要翻译： 提供了一种用于替换污染的HEPA过滤器而不污染周围环境的方法和装置。 过滤器壳体通常为圆柱形并且限定过滤器接收腔。 过滤器壳体具有过滤器接收端和过滤器去除端。 主动HEPA过滤器被容纳在过滤器壳体腔内并位于过滤器去除端附近。 备用HEPA过滤器被接收在过滤器壳体腔内并位于过滤器接收端附近。 过滤袋容纳在过滤器壳体腔内并且位于过滤器去除端附近。 过滤器壳体包括通过有源HEPA过滤器的气体流路，而不通过备用HEPA过滤器。 为了更换受污染的HEPA过滤器，端盖从过滤器接收端和过滤器外壳的过滤器去除端被移除，并且转出袋打开。 备用HEPA过滤器被推入到主动HEPA过滤器的位置，从而在过滤器更换期间将主动污染的HEPA过滤器移动到更换袋中。 转出袋密封，以隔离HEPA过滤器进行处理。