发明授权
US07963161B2 Heating resistor type air flow rate measuring device utilizing an auxiliary passage
有权
利用辅助通道的加热电阻式空气流量测量装置
- 专利标题: Heating resistor type air flow rate measuring device utilizing an auxiliary passage
- 专利标题(中): 利用辅助通道的加热电阻式空气流量测量装置
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申请号: US12261862申请日: 2008-10-30
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公开(公告)号: US07963161B2公开(公告)日: 2011-06-21
- 发明人: Takeshi Morino , Yuki Okamoto , Naoki Saito , Hiroshi Hirayama , Takahiro Miki
- 申请人: Takeshi Morino , Yuki Okamoto , Naoki Saito , Hiroshi Hirayama , Takahiro Miki
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Crowell & Moring LLP
- 优先权: JP2007-282603 20071031
- 主分类号: G01F1/68
- IPC分类号: G01F1/68
摘要:
An object of the present invention is to provide a structure which prevents a particulate contaminant and a liquid contaminant on which centrifugal separation hardly works, from arriving at a sensor element part. In order to attain the above described object, in a heat resistor type air flow rate measuring device which includes an auxiliary passage taking in a part of a fluid flowing in a main passage, and a plate-shaped sensor element installed in the aforesaid auxiliary passage and for detecting a flow rate of the fluid, and is a heat resistor type flow rate measuring device having an auxiliary passage formed along a curved line at 90° or more in an auxiliary passage portion at an upstream side from the plate-shaped sensor element, the aforesaid auxiliary passage is formed along a curved line at 90° or more on a phantom plane orthogonal to a sensor formation surface of the plate-shaped sensor element and parallel with a flow, and a sensor formation surface side and a rear side of the plate-shaped sensor element have gaps from an auxiliary passage wall surface.
公开/授权文献
- US20090173151A1 HEATING RESISTOR TYPE AIR FLOW RATE MEASURING DEVICE 公开/授权日:2009-07-09
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