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    • 1. 发明公开
    • 차압식 매스 플로우 컨트롤러에 있어서 진단 기구
    • 差压式流量控制器诊断机理
    • KR1020090075816A
    • 2009-07-09
    • KR1020097006922
    • 2007-10-29
    • 가부시키가이샤 호리바 에스텍
    • 야스다다다히로마츠우라가즈히로나가이겐타로머드다니엘
    • G05D7/06G01F1/00G01F1/78
    • G05D7/0635G01F1/50G01F1/88G01F25/0007G05B23/0221
    • A diagnostic mechanism of a differential pressure type mass flow controller (A) comprising a diagnostic parameter calculating section (2f) for determining by integration operation a mass flow rate integration value from the lowering pressure value of an inlet side sensor (4) out of the inlet side sensor (4) and an outlet side sensor (5) provided, to allow respective communication, on the inlet (31) side and the outlet (32) side of a resistor (3) generating a differential pressure between the inlet and the outlet by bringing a flow control valve (2Va) provided on the channel for allowing fluid to flow from a flow rate control state to a close state, and then determining a diagnostic volume value from the mass flow rate integration value thus determined, and a section (2h) for comparing the diagnostic volume value determined at the diagnostic parameter calculating section (2f) with a specified volume value, whereby troubles such as clogging of the resistor can be found suitably and existence of abnormality can be diagnosed precisely.
    • 一种差压式质量流量控制器(A)的诊断机构,包括:诊断参数计算部(2f),用于通过积分运算从入口侧传感器(4)的降压值除以外的质量流量积分值 入口侧传感器(4)和出口侧传感器(5),其设置成允许在电阻器(3)的入口(31)侧和出口(32)侧相互连通,从而在入口和出口侧之间产生压差 通过使设置在通道上的流量控制阀(2Va)使流体从流量控制状态流动到关闭状态,然后从由此确定的质量流量积分值确定诊断体积值, (2h),用于将诊断参数计算部(2f)所求出的诊断体积值与规定的体积值进行比较,从而可以适当地发现电阻器堵塞等问题,存在 可以精确诊断异常情况。