公开(公告)号：US20160116314A1

公开(公告)日：2016-04-28

申请号：US14696553

申请日：2015-04-27

Applicant: Mitsubishi Electric Corporation

Inventor： Kazuto AKAGI ,  Naoyuki KISHIKAWA ,  Hiroyuki URAMACHI ,  Hiroshi SAKANOUE ,  Masahiro KAWAI ,  Yuji ARIYOSHI

IPC: G01F1/56 ,  G01F15/02 ,  G01F15/18

CPC classification number: G01F5/00 ,  G01F1/6842 ,  G01F1/692 ,  G01F15/12

Abstract: A flow rate measuring device includes: a bypass passage; a flow rate detecting element; and a flow rate measuring circuit. The bypass passage includes: an inflow port; an outflow port; and a plurality of bent portions. The plurality of bent portions include first to third bent portions for forming U-shapes, and a fourth bent portion for bending the bypass passage bent at the third bent portion so as to be parallel to a mainstream flowing direction. The flow rate detecting element is arranged inside the bypass passage in a part after bending at the fourth bent portion. A route connecting the inflow port and the flow rate detecting element as a straight line is blocked by an inner wall surface of the bypass passage on an outer peripheral side, which is formed between the first bent portion and the second bent portion.

Abstract translation: 流量测量装置包括：旁通通道; 流量检测元件; 和流量测量电路。 旁路通路包括：流入口; 流出口; 和多个弯曲部。 多个弯曲部分包括用于形成U形的第一至第三弯曲部分和用于弯曲在第三弯曲部分处弯曲以使其平行于主流流动方向的旁路通道的第四弯曲部分。 流量检测元件在第四弯曲部弯曲后的一部分配置在旁通路内。 将流入口和流量检测元件连接成直线的路径被形成在第一弯曲部和第二弯曲部之间的外周侧的旁通通路的内壁面阻挡。

公开(公告)号：US20150101402A1

公开(公告)日：2015-04-16

申请号：US14180516

申请日：2014-02-14

Applicant: Mitsubishi Electric Corporation

Inventor： Naoyuki KISHIKAWA ,  Yuji ARIYOSHI ,  Masahiro KAWAI ,  Hiroyuki URAMACHI ,  Kazuto AKAGI

IPC: G01M15/04 ,  G01F9/00

CPC classification number: G01M15/042 ,  G01F1/6842 ,  G01F9/00

Abstract: Dust with various particle diameters entering a bypass passage, particularly, relatively large dust with a particle diameter of 100 to 200 μm or so, is reliably caused to collide with a first step-shaped part, a second step-shaped part and a plate-like member to be sufficiently decelerated and reach a flow rate detecting device with low collision energy. This can prevent the flow rate detecting device from being damaged by collision of dust. Furthermore, the placement position of the plate-like member is optimized to suppress air turbulence at a flow rate detecting part, which achieves a good balance between flow rate detection accuracy and dust tolerance.

Abstract translation: 具有进入旁路通道的各种粒径的粉尘，特别是粒径为100〜200μm左右的较大的粉尘，可靠地与第一台阶部，第二台阶部和板状部分碰撞， 使其充分减速，达到低碰撞能量的流量检测装置。 这可以防止流量检测装置被灰尘的碰撞损坏。 此外，优化板状部件的配置位置，以抑制流量检测部的空气湍流，实现流量检测精度与灰尘容忍度的良好平衡。

公开(公告)号：US20180113015A1

公开(公告)日：2018-04-26

申请号：US15478486

申请日：2017-04-04

Applicant: Mitsubishi Electric Corporation

Inventor： Kazuto AKAGI ,  Naoyuki KISHIKAWA ,  Masahiro KAWAI ,  Yuji ARIYOSHI

IPC: G01F5/00 ,  G01F1/64 ,  G01F15/18 ,  F02M35/10

CPC classification number: G01F5/00 ,  F02M35/10386 ,  G01F1/64 ,  G01F1/6842 ,  G01F1/6845 ,  G01F15/185

Abstract: Provide a flow measuring device by which a variation of a shape of a bypass passage, which is caused by a stack of a foreign material, is prevented, and a flow velocity of a measured fluid, which is passed on a flow detecting element, is constant.A sub-bypass passage is arranged at a previous step with respect to a bypass passage which is linked to a flow detecting element, and bypass passage wall surfaces, which are positioned at an adjacent portion of the sub-bypass passage, are inclined toward a direction of a sub-inflow opening, and an inner-circumference-side wall surface and an outer-circumference-side wall surface of the sub-bypass passage are inclined toward a direction of a sub-outflow opening.

公开(公告)号：US20190107421A1

公开(公告)日：2019-04-11

申请号：US15877435

申请日：2018-01-23

Applicant: Mitsubishi Electric Corporation

Inventor： Kazuto AKAGI ,  Yuji ARIYOSHI ,  Masahiro KAWAI ,  Naoyuki KISHIKAWA

IPC: G01F1/684 ,  G01F15/14

CPC classification number: G01F1/6842 ,  G01F1/6845 ,  G01F1/692 ,  G01F15/14

Abstract: Provide a flow measuring device which inhibits a reduction of flow detection accuracy, which is caused by an influence of a bottom flow which is flowed and inputted from a fit gap between a flow detecting element and an installing portion of the flow detecting element. A concave portion, which inhibits an influence of a bottom flow which is flowed and inputted from a fit gap between an installing portion and a flow detecting element, is provided at a bottom surface of the installing portion of a plate which is positioned on a projected area of a cavity of the flow detecting element.

公开(公告)号：US20170122788A1

公开(公告)日：2017-05-04

申请号：US15055750

申请日：2016-02-29

Applicant: Mitsubishi Electric Corporation

Inventor： Naoyuki KISHIKAWA ,  Yuji ARIYOSHI ,  Masahiro KAWAI ,  Shinichiro HIDAKA ,  Kazuto AKAGI

IPC: G01F15/18

CPC classification number: G01F15/185 ,  G01F1/005 ,  G01F1/684 ,  G01F1/6842 ,  G01F1/696

Abstract: An environment sensor arranged in a measuring chamber disposed in a circuit board receiving portion does not affect a flow of air through a bypass passage, and thus does not affect detection accuracy of a flow rate detection element arranged in the bypass passage. A recessed portion is disposed in a side surface of a base parallel to a flow direction A of intake air passing through a main passage and a communication port of the measuring chamber is disposed in the recessed portion, and thus the measuring chamber is unlikely to be infiltrated by fouling substances, water droplets, and the like contained in the intake air. The communication port has a small length dimension L, and thus an environment parameter of the intake air is likely to propagate to the measuring chamber and high levels of detection response, detection accuracy, and reliability are ensured for the environment sensor.