公开(公告)号：EP2977729A1

公开(公告)日：2016-01-27

申请号：EP14768491.4

申请日：2014-01-29

申请人： Hitachi Automotive Systems, Ltd.

发明人： TOKUYASU Noboru ,  TASHIRO Shinobu ,  MORINO Takeshi ,  UENODAN Akira

IPC分类号： G01F1/692 ,  G01F1/684 ,  G01P5/12

CPC分类号： G01F1/6847 ,  G01F1/6842 ,  G01F1/692 ,  G01F1/696 ,  G01F5/00 ,  G01P5/12

摘要： In order to provide a thermal flow meter capable of preventing adherence of contaminants to an air flow sensing portion, the thermal flow meter (300) of the invention includes a bypass passage for flowing a measurement target gas (30) received from a main passage (124) and an air flow sensing portion (602) for measuring a flow rate of the measurement target gas (30) by performing heat transfer with the measurement target gas (30) flowing through the bypass passage through a heat transfer surface (437). The air flow sensing portion (602) is provided to be exposed to an exposed surface (402) arranged along a flow direction of the measurement target gas (30) inside the bypass passage is embedded, the mount support surface (402) has a stage (407) formed to surround a periphery of the air flow sensing portion (602), and an inner portion surrounded by the stage protrudes more than an outer portion of the stage.

摘要翻译： 为了提供能够防止污染物与气流感测部的粘附的热流量计，本发明的热流量计（300）包括用于使从主通路（1）接收的测量对象气体（30）流动的旁通通路 124）和用于通过使流过旁通通路的测量对象气体（30）通过传热面（437）进行传热来测量测量对象气体（30）的流量的气流感测部（602）。 空气流动检测部分602被设置为暴露于沿旁路通道内部的测量对象气体30的流动方向布置的暴露表面402，安装支撑表面402具有一个阶段 （407），其形成为围绕所述气流检测部（602）的周边，并且由所述台围绕的内部部分比所述台的外部突出。