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比专利适用于矿山通风的主扇。目的在于依借同时测定风流全压、静压和动压来扩大此装置的功能范围。此装置由全压和静压管、电动机和热线风速测定变换器组成。后者有两个传感元件布置在工作室内。此装置装配有带一组小孔的喷管、间歇式运动机构、空气分
Than the patent for mine ventilation of the main fan. The purpose is to expand the functional range of this device by simultaneously determining the total pressure of the airflow, the static pressure and the dynamic pressure. The device consists of a full pressure and static pressure tube, motor and hot wire wind speed measuring transducer. The latter has two sensing elements arranged in the working chamber. This unit is equipped with a nozzle with a series of small holes, intermittent movement mechanism, air separation