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1. 发明申请

WO2005053819A1 A FILTER SYSTEM FOR AN ELECTRONIC EQUIPMENT ENCLOSURE 审中-公开
标题翻译：一种用于电子设备外壳的过滤系统
公开(公告)号：WO2005053819A1
公开(公告)日：2005-06-16
申请号：PCT/US2004/039817
申请日：2004-11-24
申请人： EMERSON NETWORK POWER, ENERGY SYSTEMS, NORTH AMERICA, INC. , LATHAM, Steven, R. , GARCIA, Marvin, P. , COSLEY, Michael, R.
发明人： LATHAM, Steven, R. , GARCIA, Marvin, P. , COSLEY, Michael, R.
IPC分类号： B01D46/12
CPC分类号： B01D46/0023 , B01D46/0086 , B01D46/12 , B01D46/46 , B01D46/54 , B01D2267/40 , B01D2273/30 , G11B33/146 , H05K7/20181 , Y10S95/90
摘要： A filter system including a method for self cleaning the filter system of an electronic equipment enclosure (10) where air flow is monitored wither by monitoring fan performance or air flow velocity through the enclosure. The system includes two filters elements, an upstream ASHRAE or HEPA filter element (22) to block particulate matter and a downstream PTFE filter element (24) to block water vapor. The ASHRAE or HEPA filter elements is relatively inexpensive and easy to clean. The PTFE filter element is more expensive and difficult to clean. Thus, the cheaper filter is used to protect the more expensive filter from contaminants and to increase its useful life. The method of self cleaning includes stopping the fan when a signal is received indicating a predetermined resistance to air flow which is a function of blockage of the filter elements, thereafter operating the fan an increased rotational velocity to determine whether the fan itself is malfunctioning, thereafter slowing and stopping the fan to allow the fan to be reversed, rotating the fan in reverse for a predetermined period of time, such as five minutes, thereafter slowing and stopping the fan and returning the fan to its usual rotational velocity and direction. If the resistance to air flow is still above a predetermined level, the fan is again slowed, stopped and reversed and then returned to normal operation. The reversal operation can be conducted a multiple number of times, however, after a predetermined number, a signal is sent requesting maintenance.
摘要翻译：一种过滤系统，包括用于自动清洁电子设备外壳（10）的过滤系统的方法，其中通过监视通过外壳的风扇性能或空气流速来监测空气流量。该系统包括两个过滤器元件，用于阻止颗粒物质的上游ASHRAE或HEPA过滤元件（22）和用于阻挡水蒸汽的下游PTFE过滤元件（24）。 ASHRAE或HEPA过滤元件相对便宜且易于清洁。 PTFE过滤元件更昂贵，难以清洗。因此，更便宜的过滤器用于保护更昂贵的过滤器免于污染物并增加其使用寿命。自清洁方法包括当接收到指示预定的阻力为空气流量的信号时停止风扇，该风阻是过滤器元件堵塞的函数，此后使风扇运转增加旋转速度，以确定风扇本身是否发生故障减速并停止风扇使风扇反转，将风扇反向旋转一段预定时间，如五分钟，然后减速并停止风扇，并将风扇返回到其通常的转速和方向。如果气流阻力仍高于预定值，则风扇再次变慢，停止并反转，然后恢复正常运行。反转操作可以进行多次，然而，在预定数量之后，发送请求维护的信号。

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