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    • 2. 发明专利
    • Thermal type flowmeter
    • 热式流量计
    • JP2014186008A
    • 2014-10-02
    • JP2013062913
    • 2013-03-25
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • MORINO TAKESHITASHIRO SHINOBUTOKUYASU NOBORUINOUE ATSUSHIUENODAN AKIRA
    • G01F1/684
    • G01F1/6842G01F1/684G01F5/00
    • PROBLEM TO BE SOLVED: To provide a thermal type flowmeter that reduces stress affecting a member provided with a flow rate detecting part and that can accurately detect gas to be measured.SOLUTION: The present invention is a thermal type flowmeter 300 that includes a flow rate detecting part 602 for measuring a flow rate of gas 30 to be measured, by heat transfer between a sub-passage for flowing the gas 30 to be measured taken from a main passage 124 and the gas 30 to be measured flowing in the sub-passage. A surface cover 303 forms the sub-passage by welding to a housing 302 while covering a sub-passage groove. An engaging part 610 for engaging the housing 302 and the surface cover 303 with each other is formed at a position that is different from a weld part 690 where the housing 302 and the surface cover 303 are welded and that is surrounded by an inner wall 681 of an insertion opening 680.
    • 要解决的问题:提供一种能够降低影响具有流量检测部件的部件的应力并能够精确地检测待测气体的热式流量计。解决方案:本发明是一种热式流量计300,其包括流量 检测部分602,用于通过用于使从主通道124取得的待测量气体30流动的子通道与待分析通道中流动的被测量气体30之间的热传递来测量待测量的气体30的流量; 。 表面盖303通过在覆盖子通道槽的同时通过焊接而与壳体302形成子通道。 用于将壳体302和表面盖303彼此接合的接合部分610形成在与焊接部分690不同的位置处,其中壳体302和表面覆盖物303被焊接并且被内壁681包围 的插入开口680。
    • 4. 发明专利
    • Thermal flowmeter
    • 热流量计
    • JP2014001972A
    • 2014-01-09
    • JP2012136129
    • 2012-06-15
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • MORINO TAKESHITASHIRO SHINOBUTOKUYASU NOBORUHANZAWA KEIJIINOUE ATSUSHIUENODAN AKIRA
    • G01F1/684G01F1/00
    • G01F1/684G01F1/6842G01F1/6845G01F1/692G01F1/696G01F1/6965
    • PROBLEM TO BE SOLVED: To provide a thermal flowmeter that can prevent contaminants guided toward the outer circumference of a sub-passage by centrifugal force and particulate or liquid contaminants not readily permitting centrifugal separation from reaching the heat transmitting face of a flow rate detecting unit and thereby achieve a high level of measuring precision.SOLUTION: A thermal flowmeter has an upstream side curved path 390 in which a sub-passage is formed in a curved shape along a plane intrinsic to the side farther upstream than a flow rate detecting unit at least in the flowing direction of gas to be measured and a branching wall 378 formed from the downstream side of the upstream side curved path 390 to the downstream side of the flow rate detecting unit. The sub-passage on the downstream side of the upstream side curved path 390 is branched by the branching wall 378 into a main flow path 377 fluidly continuous to the outer circumferential wall side of the upstream side curved path 390 and a branch path 388 fluidly continuous to the inner circumferential wall side of the upstream side curved path 390, and the flow rate detecting unit is so arranged within the main flow path 377 that its heat transmitting face exposing part 436 is in a posture parallel to the intrinsic plane of the upstream side curved path 390.
    • 要解决的问题:提供一种热流量计,其能够防止通过离心力向副通道的外周引导的污染物和不容易使离心分离到达流量检测单元的热传递面的颗粒或液体污染物,以及 从而达到高水平的测量精度。解决方案:热流量计具有上游侧弯曲路径390,其中沿着至少比流量检测单元更远的一侧的侧面固有的弯曲形状的子通道至少 在被测定气体的流动方向和从上游侧曲线路径390的下游侧向流量检测部的下游侧形成的分支壁378。 上游侧曲线路径390的下游侧的副通道由分支壁378分支成与上游侧弯曲路径390的外周壁侧流体连通的主流路377和流路连通的分支路388 上游侧弯曲路径390的内周壁侧,流量检测单元配置在主流路377内,使其传热面露出部436处于与上游侧的固有平面平行的姿势 曲线路径390。
    • 5. 发明专利
    • Thermal type flowmeter
    • 热式流量计
    • JP2014001968A
    • 2014-01-09
    • JP2012136108
    • 2012-06-15
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • TASHIRO SHINOBUHANZAWA KEIJITOKUYASU NOBORUMORINO TAKESHIDOI RYOSUKEUENODAN AKIRA
    • G01F1/684
    • PROBLEM TO BE SOLVED: To provide a thermal type flowmeter with a structure having high reliability of a connecting part for electrically connecting terminals to each other in the thermal type flowmeter.SOLUTION: A thermal type flowmeter 300 comprises: a sub-passage for making measured gas 30 taken in from a main passage 124 flow through; and a flow rate detecting element for measuring a flow rate of the measured gas 30 by performing heat transfer between the measured gas 30 flowing through the sub-passage and itself. In a housing of the thermal type flowmeter 300, a resin coating part 330 for coating a connecting part 320 to which a connecting terminal 412 and an external terminal 306 of a circuit package 400 having a flow rate detecting part 602 are electrically connected, with a second resin 301 constituting the housing is formed.
    • 要解决的问题:提供一种具有在热式流量计中将端子彼此电连接的连接部具有高可靠性的结构的热式流量计。解决方案:热式流量计300包括:用于测量的子通道 从主通道124取出的气体30流过; 以及流量检测元件,用于通过在流过所述子通道的测量气体30与其自身之间进行热传递来测量所测量的气体30的流量。 在热式流量计300的壳体中,用于涂覆连接部分320的树脂涂覆部分330,连接部分320与具有流量检测部分602的电路封装400的连接端子412和外部端子306电连接, 形成构成壳体的第二树脂301。
    • 7. 发明专利
    • Thermal type flowmeter
    • 热式流量计
    • JP2014001985A
    • 2014-01-09
    • JP2012136293
    • 2012-06-15
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • TASHIRO SHINOBUHANZAWA KEIJITOKUYASU NOBORUMORINO TAKESHIDOI RYOSUKEUENODAN AKIRA
    • G01F1/684G01F1/692
    • PROBLEM TO BE SOLVED: To provide a thermal type flowmeter having high measurement accuracy while maintaining the inside of a gap formed on a rear surface of a flow rate detecting element in a clean state.SOLUTION: A thermal type flowmeter 300 comprises: a sub-passage for making measured gas 30 taken in from a main passage 124 flow through; and a flow rate detecting element for measuring a flow rate of the measured gas 30 by performing heat transfer between the measured gas 30 flowing through the sub-passage and itself. A circuit package 400 of the thermal type flowmeter 300 is molded of polymer resin 401 in a state where the flow rate detecting element 602 is mounted on a substrate 536, and a porous film 550 capable of ventilating a gap 674 of the flow rate detecting element 602 and the outside of the circuit package 400 is integrally molded of the polymer resin 401 constituting the circuit package 400, with the substrate 536, so as to cover a vent hole 521 formed on the substrate 536 on which the flow rate detecting element 602 is mounted.
    • 要解决的问题:提供一种具有高测量精度的热式流量计,同时保持在清洁状态下形成在流量检测元件的后表面上的间隙的内部。热解流量计300包括: 用于使从主通道124取出的测量气体30的通道流过; 以及流量检测元件,用于通过在流过所述子通道的测量气体30与其自身之间进行热传递来测量所测量的气体30的流量。 在流量检测元件602安装在基板536上的状态下,热式流量计300的电路封装400由聚合物树脂401成型,能够使流量检测元件的间隙674通风的多孔膜550 602和电路封装400的外部由构成电路封装400的聚合物树脂401与基板536整体模制,以覆盖形成在基板536上的通气孔521,流量检测元件602 安装。