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    • 6. 发明授权
    • Filter service life estimator
    • 过滤器使用寿命估算器
    • US07537648B1
    • 2009-05-26
    • US11411679
    • 2006-04-26
    • Christopher J. KarwackiGregory W. PetersonYuqing Ding
    • Christopher J. KarwackiGregory W. PetersonYuqing Ding
    • F24F13/00G01P13/00
    • B01D46/0086Y10S55/34Y10S116/25
    • A mechanical device is used to estimate a service life of an air filter exposed to a certain chemical at various concentrations, flow rates, and relative humidity conditions. The device includes two members, one of which has at least one window, connected so that their surfaces are movable relative to one another. One member has numerical values for chemical concentrations and service life estimates printed on it. The member having windows has at least one mark printed on it by which it can be oriented relative to the chemical concentration scale on the other member. When the two members are aligned relative to a chemical concentration of interest, the corresponding service life estimate is displayed in an appropriate window.
    • 机械装置用于估计暴露于某种化学物质的各种浓度,流量和相对湿度条件下的空气过滤器的使用寿命。 该装置包括两个构件,其中一个具有至少一个窗口,其连接成使得它们的表面可相对于彼此移动。 一名成员具有印制在其上的化学品浓度和使用寿命估算值。 具有窗口的构件具有印刷在其上的至少一个标记,通过该标记可以相对于另一个构件上的化学浓度标尺定向。 当两个成员相对于感兴趣的化学物质浓度对准时,相应的使用寿命估计将显示在适当的窗口中。