JP2001091324A5 - - Google Patents

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Publication number
JP2001091324A5
JP2001091324A5 JP2000249997A JP2000249997A JP2001091324A5 JP 2001091324 A5 JP2001091324 A5 JP 2001091324A5 JP 2000249997 A JP2000249997 A JP 2000249997A JP 2000249997 A JP2000249997 A JP 2000249997A JP 2001091324 A5 JP2001091324 A5 JP 2001091324A5
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JP
Japan
Prior art keywords
air passage
fluid
measured
heating resistor
throttle
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Withdrawn
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JP2000249997A
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Japanese (ja)
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JP2001091324A (en
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Priority to JP2000249997A priority Critical patent/JP2001091324A/en
Priority claimed from JP2000249997A external-priority patent/JP2001091324A/en
Publication of JP2001091324A publication Critical patent/JP2001091324A/en
Publication of JP2001091324A5 publication Critical patent/JP2001091324A5/ja
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Claims (4)

被測定流体が流れる主空気通路を形成する主空気通路体と、前記主空気通路体内に挿入されて前記被測定流体の流量を測定する発熱抵抗体等を包含する測定モジュールとを備える発熱抵抗体式空気流量測定装置において、
前記測定モジュールは、前記被測定流体の入口開口部と出口開口部とを含む曲がりを持った副空気通路を形成している副空気通路体の内部に、前記発熱抵抗体等を有し、
前記主空気通路体は、前記副空気通路体の上流側に位置する内部側壁周囲に前記主空気通路の内側に突出した絞りを有し、
前記副空気通路体は前記入口開口部と前記出口開口部が、前記被測定流体が前記絞りの先端から前記被測定流体の主流線に平行方向に延展して形成する流束領域の内側に位置するように配設され、前記入口開口部と前記出口開口部の圧力差を大きくして前記副空気通路を流れる前記被測定流体の流速を大きくするようにしたことを特徴とする発熱抵抗体式空気流量測定装置。A heating resistor type comprising a main air passage body forming a main air passage through which a fluid to be measured flows, and a measurement module including a heating resistor inserted into the main air passage to measure the flow rate of the fluid to be measured. In the air flow measurement device,
The measurement module has the heating resistor and the like inside a sub air passage body forming a sub air passage having a bend including an inlet opening and an outlet opening of the fluid to be measured.
The main air passage body has a throttle projecting inward of the main air passage around an inner side wall located on the upstream side of the sub air passage body,
The sub-air passage body has the inlet opening and the outlet opening positioned inside a flux region formed by the fluid to be measured extending from the tip of the throttle in a direction parallel to the main flow line of the fluid to be measured. The heating resistor type air is arranged to increase the flow rate of the fluid to be measured flowing through the auxiliary air passage by increasing the pressure difference between the inlet opening and the outlet opening. Flow measurement device. 被測定流体を吸気するエアエアクリーナと、前記エアエアクリーナから前記被測定流体が流入する主空気通路を形成する主空気通路体と、前記主空気通路体内に挿入されて前記被測定流体の流量を測定する発熱抵抗体等を包含する測定モジュールとを備える発熱抵抗体式空気流量測定装置において、
前記測定モジュールは、前記被測定流体の入口開口部と出口開口部とを含む曲がりを持った副空気通路を形成している副空気通路体の内部に、前記発熱抵抗体等を有し、
前記エアエアクリーナは、前記副空気通路体の上流側に位置する吸気出口開口部に前記主空気通路の有効断面積より小さい有効断面積の絞りを形成され、
前記副空気通路体は前記入口開口部と前記出口開口部が、前記被測定流体が前記絞りの先端から前記被測定流体の主流線に平行方向に延展して形成する流束領域の内側に位置するように配設され、前記入口開口部と前記出口開口部の圧力差を大きくして前記副空気通路を流れる前記被測定流体の流速を大きくするようにしたことを特徴とする発熱抵抗体式空気流量測定装置。An air air cleaner that sucks in the fluid to be measured, a main air passage body that forms a main air passage through which the fluid to be measured flows from the air air cleaner, and a flow rate of the fluid to be measured that is inserted into the main air passage body In a heating resistor type air flow measuring device comprising a measurement module including a heating resistor and the like,
The measurement module has the heating resistor and the like inside a sub air passage body forming a sub air passage having a bend including an inlet opening and an outlet opening of the fluid to be measured.
The air air cleaner is formed with a throttle having an effective cross-sectional area smaller than an effective cross-sectional area of the main air passage at an intake outlet opening located on the upstream side of the sub air passage body,
The sub-air passage body has the inlet opening and the outlet opening positioned inside a flux region formed by the fluid to be measured extending from the tip of the throttle in a direction parallel to the main flow line of the fluid to be measured. The heating resistor type air is arranged to increase the flow rate of the fluid to be measured flowing through the auxiliary air passage by increasing the pressure difference between the inlet opening and the outlet opening. Flow measurement device. 請求項１、２のいずれか１項において、前記絞りの寸法は、前記絞り位置における前記主空気通路の有効断面積に対する前記絞りの有効断面積の比の関係が７０〜９０(％)の範囲となっていることを特徴とする発熱抵抗体式空気流量測定装置。3. The size of the throttle according to claim 1, wherein the ratio of the effective cross-sectional area of the throttle to the effective cross-sectional area of the main air passage at the throttle position is in a range of 70 to 90 (%). A heating resistor type air flow rate measuring device characterized by that. 請求項１、２のいずれか１項において、前記絞りの形状は、当該絞りの上流側半分がほぼ円弧形状であり、下流側半分が前記主流線方向に対しほぼ垂直形状であることを特徴とする発熱抵抗体式空気流量測定装置。The shape of the throttle according to any one of claims 1 and 2, wherein the upstream half of the throttle is substantially arc-shaped and the downstream half is substantially perpendicular to the main stream line direction. Heating resistor type air flow measuring device.
JP2000249997A 2000-08-21 2000-08-21 Heat resistor type air flowrate measuring device Withdrawn JP2001091324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000249997A JP2001091324A (en) 2000-08-21 2000-08-21 Heat resistor type air flowrate measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000249997A JP2001091324A (en) 2000-08-21 2000-08-21 Heat resistor type air flowrate measuring device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP23162096A Division JP3527813B2 (en) 1996-09-02 1996-09-02 Heating resistor type air flow measurement device

Publications (2)

Publication Number Publication Date
JP2001091324A JP2001091324A (en) 2001-04-06
JP2001091324A5 true JP2001091324A5 (en) 2005-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000249997A Withdrawn JP2001091324A (en) 2000-08-21 2000-08-21 Heat resistor type air flowrate measuring device

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JP (1) JP2001091324A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5912276B2 (en) * 2011-03-29 2016-04-27 株式会社クボタ Air cleaner

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