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    • 2. 发明授权
    • Device and process for indicating the exhaustion of a filter
    • 用于指示过滤器耗尽的装置和过程
    • US6040777A
    • 2000-03-21
    • US321465
    • 1999-05-27
    • Klaus AmmannWolfgang Bather
    • Klaus AmmannWolfgang Bather
    • B01D46/46G08B21/00
    • B01D46/46
    • A device and a process for indicating the exhaustion of an adsorption filter to indicate a necessary filter change in time is provided. The monitoring device has a gas concentration-measuring device (8), a temperature-measuring device (9) for determining the temperature of the ambient air, a memory unit (3) with a first memory field (4), in which filter data sets associated with individual filters are stored, with a second memory field (5), in which data specific of toxic substances are stored, and with a third memory field (6), which contains preset values for the ambient air humidity and the respiratory minute volume, as well as an input unit (7) for selecting preset values from the memory fields (4, 5, 6). A timer (10) with a start button (13), which provides an output of the service life t of the adsorption filter is also provided. An evaluating circuit (2) is provided, which determines a remaining capacity of the adsorption filter from the values selected with the input unit (7), the measured toxic substance content in the ambient air, the temperature of the ambient air, and the service life t, and an alarm means (11) for generating a filter exhaustion signal when the remaining capacity is lower than or equal to a preset limit value.
    • 提供了一种用于指示吸附过滤器耗尽以指示必要的过滤器时间变化的装置和方法。 监测装置具有气体浓度测定装置(8),用于判定环境空气的温度的温度测定装置(9),具有第一存储器场(4)的存储单元(3),其中过滤器数据 存储与各个过滤器相关联的组,其中存储有特定有毒物质的数据的第二存储器区域(5),以及包含环境空气湿度和呼吸分钟的预设值的第三存储器区域(6) 音量,以及用于从存储器字段(4,5,6)中选择预置值的输入单元(7)。 还提供了具有启动按钮(13)的定时器(10),其提供吸附过滤器的使用寿命t的输出。 提供评估电路(2),其从根据输入单元(7)选择的值,环境空气中测得的有毒物质含量,环境空气的温度和服务确定吸附过滤器的剩余容量 寿命t和用于当剩余容量低于或等于预设极限值时产生过滤器耗尽信号的报警装置(11)。