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公开(公告)号:US4875406A
公开(公告)日:1989-10-24
申请号:US177549
申请日:1988-03-25
CPC分类号: G01N33/0026 , B60H3/0085
摘要: A device for the detection of various pollutant contents in gas streams, preferably in the supply to motor vehicle cabins or protection cabins for operators, with use of one or several pollutant-detecting semiconductor gas sensors. A gas sensor (4) is alternately exposed to the gas streams to be evaluated. The sensor is placed at the separation point between the outer air and the cabin air, whereby, through switching which is effected within seconds, a practially constant comparison between the quality of the inner air and the outer air is performed. For this purpose, a switching arrangement is assigned to the gas sensor (4). The gas sensor (4) and the switching arrangement can be mounted on the fresh air/ambient air valve (3). The output signal of the gas sensor (4) serves for the control of the fresh air/ambient air valve (3).
摘要翻译: PCT No.PCT / EP87 / 00411 Sec。 371日期:1988年3月25日 102(e)1988年3月25日PCT PCT 1987年7月29日PCT公布。 第WO88 / 01057号公报 日期:1988年2月11日。一种用于检测气流中的各种污染物含量的装置,优选地使用一个或多个污染物检测半导体气体传感器供给操作者的机动车辆舱或保护舱。 气体传感器(4)交替地暴露于待评估的气流中。 传感器被放置在外部空气和舱室空气之间的分离点处,由此通过在几秒钟内进行的切换,执行内部空气和外部空气的质量之间的实际恒定的比较。 为此,向气体传感器(4)分配开关装置。 气体传感器(4)和开关装置可以安装在新鲜空气/环境空气阀(3)上。 气体传感器(4)的输出信号用于新鲜空气/环境空气阀(3)的控制。