WO2020039691A1 - 流量測定装置 - Google Patents

流量測定装置 Download PDF

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Publication number
WO2020039691A1
WO2020039691A1 PCT/JP2019/022339 JP2019022339W WO2020039691A1 WO 2020039691 A1 WO2020039691 A1 WO 2020039691A1 JP 2019022339 W JP2019022339 W JP 2019022339W WO 2020039691 A1 WO2020039691 A1 WO 2020039691A1
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WO
WIPO (PCT)
Prior art keywords
flow
branch
opening
measurement device
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/022339
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English (en)
French (fr)
Japanese (ja)
Inventor
和明 上田
健悟 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to DE112019004243.2T priority Critical patent/DE112019004243T5/de
Publication of WO2020039691A1 publication Critical patent/WO2020039691A1/ja
Priority to US17/181,261 priority patent/US20210172780A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/185—Circuit arrangements for generating control signals by measuring intake air flow using a vortex flow sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/10386—Sensors for intake systems for flow rate
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6842—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow with means for influencing the fluid flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6847—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow where sensing or heating elements are not disturbing the fluid flow, e.g. elements mounted outside the flow duct
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/72—Devices for measuring pulsing fluid flows

Definitions

  • the present disclosure relates to a flow measurement device.
  • the flow measurement device is provided in the flow path for flowing the fluid and measures the flow rate of the fluid flowing in the flow path.
  • the flow measurement device includes a first branch channel having an opening that takes in at least a part of the fluid from the channel, and a flow detection unit that detects a flow rate of the fluid that branches from the first branch channel and flows from the first branch channel.
  • a vortex may be formed in the first branch.
  • the formation of the vortex impedes the flow of the fluid to the second branch and deteriorates the detection accuracy of the flow detecting unit. For this reason, a technique capable of suppressing the formation of a vortex in the first branch channel of the flow measurement device is desired.
  • a flow measurement device is provided.
  • the flow measurement device is a flow measurement device provided in a flow channel for flowing a fluid, the first flow channel having a first opening that takes in at least a part of the fluid from the flow channel, and the first flow channel.
  • a second branch having a flow rate detection unit for detecting a flow rate of the fluid flowing from the first branch, and the inside of the first branch has a structure in which a vortex is unlikely to be formed.
  • the flow rate measuring device of this aspect since the vortex can be hardly formed in the first branch flow path, the detection accuracy of the flow rate detecting unit caused by the obstruction of the flow of the fluid to the second branch flow path is reduced. Can be suppressed.
  • FIG. 1 is a cross-sectional view of a main part showing a flow measurement device according to the first embodiment
  • FIG. 2 is an explanatory diagram showing the flow measuring device viewed from the ⁇ Y axis direction side
  • FIG. 3 is a cross-sectional view of a main part showing the flow rate measuring device according to the first embodiment
  • FIG. 4 is a cross-sectional view of a main part showing a flow measurement device of a comparative example.
  • FIG. 5 is a cross-sectional view of a main part showing a flow measurement device according to a second embodiment
  • FIG. 6 is a cross-sectional view of a main part showing a flow measurement device according to a second embodiment.
  • FIG. 1 is a cross-sectional view of a main part showing a flow measurement device according to the first embodiment
  • FIG. 2 is an explanatory diagram showing the flow measuring device viewed from the ⁇ Y axis direction side
  • FIG. 3 is a cross-sectional view of a main part showing the flow
  • FIG. 7 is a cross-sectional view of a main part showing a flow measurement device according to a third embodiment
  • FIG. 8 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 9 is a cross-sectional view illustrating a main part of a flow measurement device according to another embodiment.
  • FIG. 10 is an explanatory diagram showing a flow measurement device of another embodiment
  • FIG. 11 is an explanatory diagram showing a flow measurement device of another embodiment
  • FIG. 12 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 13 is an explanatory diagram showing a flow measurement device of another embodiment
  • FIG. 14 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 14 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 15 is a main-portion cross-sectional view showing a flow measurement device of another embodiment
  • FIG. 16 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 17 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 18 is a cross-sectional view of a main part showing a flow measurement device of another embodiment
  • FIG. 19 is a cross-sectional view of a main part showing a flow measurement device according to another embodiment.
  • the flow measuring device 10 according to the first embodiment shown in FIG. 1 is provided in a flow path for flowing a fluid and measures the flow rate of the fluid flowing in the flow path.
  • the flow measurement device 10 is provided by being inserted into an intake pipe IP that guides a fluid to a cylinder of an internal combustion engine.
  • the XYZ axis in FIG. 1 has an X axis, a Y axis, and a Z axis as three spatial axes orthogonal to each other.
  • the XYZ axes in FIG. 1 correspond to the XYZ axes in other figures.
  • FIG. 1 shows a cross section of the flow measurement device 10 cut along the YZ plane. In the flow direction of the fluid in FIG.
  • the + Y axis direction is defined as a forward direction
  • the ⁇ Y axis direction is defined as a reverse direction.
  • the forward fluid flow direction is indicated as a direction FD.
  • the cylinder of the internal combustion engine is provided on the + Y-axis direction side from the flow measuring device 10.
  • FIG. 2 shows the flow rate measuring device 10 as viewed from the ⁇ Y axis direction side.
  • the cross section of FIG. 1 is a cross section of the flow measurement device 10 as viewed from the arrow F1 in FIG.
  • FIG. 3 shows a cross section of the flow measurement device 10 cut along the XY plane.
  • the cross section of FIG. 3 is a cross section of the flow measurement device 10 as viewed from the arrow F3 in FIG.
  • the flow measuring device 10 includes a first branch 100, a second branch 200, a flow detector 300, a plate 402, and a plate 404.
  • the first branch channel 100 is a channel for taking in a part of the fluid flowing through the intake pipe IP.
  • the first branch channel 100 has a first opening 110 on the ⁇ Y-axis direction side and a second opening 120 on the + Y-axis direction side.
  • the first branch channel 100 is a channel extending from the first opening 110 to the second opening 120.
  • the length L1 on the + Z-axis direction side from the first opening 110 is longer than the length L2 on the ⁇ Z-axis direction side from the first opening 110.
  • the second branch channel 200 is a channel that branches off from the first branch channel 100.
  • the second branch channel 200 is a channel that branches off from the first branch channel 100 and extends to the third opening 220.
  • the third opening 220 is open on the wall surface in the + X axis direction.
  • another third opening 220 is provided on the wall surface in the ⁇ X axis direction.
  • the flow rate detection unit 300 is provided on the + Z-axis direction side of the second branch channel 200.
  • the flow detector 300 detects the flow rate of the fluid flowing from the first branch 100 to the second branch 200.
  • the flow rate detection unit 300 is indicated by a broken line because it is arranged on the + X-axis direction side, which is the back side of the paper.
  • the flow rate detection unit 300 is a hot wire type.
  • the flow detector 300 may be a flap type or a Karman vortex type.
  • the plate member 402 and the plate member 404 are arranged so as to be located inside the first branch channel 100.
  • the plate-like member 402 and the plate-like member 404 both extend along the Y-axis direction.
  • the plate member 402 is disposed on the ⁇ Z axis direction side of the plate member 404.
  • a part of the plate member 402 and a part of the plate member 404 are arranged so as to be located within a range R indicated by a broken line.
  • the range R includes an opening cross section CS of the second branch channel 200 at a branch position where the second branch channel 200 branches from the first branch channel 100, and a normal extending from the periphery of the opening cross section CS perpendicular to the opening cross section CS.
  • the range R is a range in which the opening cross section CS exists along the normal vector direction of the opening cross section CS in the first branch channel 100.
  • the ends of the plate-like members 402 and 404 in the ⁇ Y-axis direction are located at the ends of the first branch channels 100 on the ⁇ Y-axis direction side.
  • the length of the plate member 402 and the plate member 404 in the X-axis direction is a length that traverses the flow path cross section of the first branch channel 100 in the X-axis direction.
  • the plate-shaped member 402 and the plate-shaped member 404 are fixed to the inner wall surface on the + X axis direction side and the inner wall surface on the ⁇ X axis direction side of the first branch channel 100.
  • the flow measurement device 10p of the comparative example shown in FIG. 4 has the same configuration as the flow measurement device 10 of the first embodiment except that the plate-like members 402 and 404 are not provided.
  • the same reference numerals as in the first embodiment denote the same components, and refer to the preceding description.
  • the flow UF and the flow are generated at the periphery of the first opening 110.
  • DF occurs.
  • the flow UF indicates a flow in which the fluid that has collided with the portion on the + Z axis direction side from the first opening 110 is taken into the first branch channel 100.
  • the flow DF indicates a flow in which the fluid that has collided with the portion on the ⁇ Z axis direction side from the first opening 110 is taken into the first branch channel 100.
  • ⁇ Length L1 of the flow measurement device 10p of the comparative example is longer than length L2, similarly to the flow measurement device 10 of the first embodiment. For this reason, the amount of the fluid whose flow direction is changed by colliding with the portion on the + Z axis direction side from the first opening 110 is changed by colliding with the portion on the ⁇ Z axis direction side from the first opening 110. More than the amount of fluid to be changed. For this reason, since the flow velocity of the flow DF tends to be higher than that of the flow UF, the flow rate taken into the first branch flow path 100 at the periphery of the first opening 110 is biased. Vortex VT may be formed in the inside. The formation of the vortex VT hinders the flow of the fluid to the second branch channel 200, and deteriorates the detection accuracy of the flow rate detection unit 300.
  • the flow measuring device 10 of the first embodiment shown in FIG. 1 when a part of the fluid flowing through the intake pipe IP in the forward + Y-axis direction is taken into the first branch channel 100, the first opening is formed.
  • the flow MF indicates a flow in which the fluid flowing toward the center of the first opening 110 in the Y-axis direction is taken into the first branch channel 100.
  • the flow UF and the flow DF are the same as the flow UF and the flow DF in FIG.
  • the plate member 402 and the plate member 404 are disposed inside the first branch channel 100 as a vortex reducing structure for reducing the generation of vortices.
  • the vortex VT described in the measurement device 10p can be hardly formed. For this reason, it is possible to suppress the deterioration of the detection accuracy of the flow detection unit 300 caused by the obstruction of the flow of the fluid to the second branch channel 200.
  • the plate-like members 402 and 404 are arranged so as to be located within the range R illustrated in FIG. Can be difficult.
  • the flow measurement device 12 of the second embodiment shown in FIG. 5 is different from the flow measurement device 10 of the first embodiment in that the plate member 402 and the plate member 404 are not provided and the protrusion 502 is provided. Except for this, the configuration is the same as the device configuration of the flow measurement device 10 of the first embodiment.
  • the same reference numerals as in the first embodiment denote the same components, and refer to the preceding description.
  • the flow measurement device 12 includes the protrusion 502.
  • the protruding portion 502 protrudes from the periphery of the first opening 110 in the ⁇ Y-axis direction.
  • the protruding portion 502 protrudes from a portion on the + Z axis direction side of the periphery of the first opening 110.
  • FIG. 6 shows a cross section of the flow measuring device 12 taken along the XY plane.
  • the cross section of FIG. 3 is a cross section of the flow measuring device 12 as viewed from the arrow F6 of FIG.
  • the shape of the protrusion 502 as viewed from the -Z-axis direction is a rectangular shape.
  • the flow measuring device 12 of the second embodiment when a part of the fluid flowing through the intake pipe IP in the forward + Y-axis direction is taken into the first branch channel 100, the flow at the peripheral edge of the first opening 110 is A UF, a flow MF and a flow DF occur.
  • the flow measuring device 12 according to the second embodiment since the protrusion 502 is provided, the flow direction is changed by colliding with the portion on the + Z axis direction side from the first opening 110 and the first opening is changed. The amount of fluid taken into section 110 is limited. For this reason, the difference between the flow velocity of the flow UF and the flow velocity of the flow DF is smaller than that of the flow measurement device 10p of the comparative example shown in FIG.
  • the occurrence of bias in the flow rate can be suppressed. Therefore, since the vortex VT is less likely to be formed in the first branch channel 100, it is possible to suppress the deterioration of the detection accuracy of the flow rate detection unit 300 caused by obstructing the flow of the fluid to the second branch channel 200.
  • the flow measuring device 14 according to the third embodiment shown in FIG. 7 is different from the flow measuring device 12 according to the second embodiment in that the flow measuring device 14 includes a plate-shaped member 408 and is different in shape from the first branch flow channel 100.
  • the configuration of the flow measurement device 12 of the second embodiment is the same as that of the flow rate measurement device 12 of the second embodiment, except that the second branch channel 200 has a shape different from that of the first branch channel 100a. It is.
  • the same reference numerals as in the first embodiment denote the same components, and refer to the preceding description.
  • the first branch channel 100a has a front channel 100f and a rear channel 100g.
  • the front flow path 100f is a flow path on the side of the first opening 110 from a branch position BP where the second branch flow path 200 branches from the first branch flow path 100a.
  • the rear flow path 100g is a flow path closer to the second opening 120 than the front flow path 100f.
  • the rear flow channel 100g is inclined toward the second flow channel 200 with respect to the front flow channel 100f. In other words, while the front flow path 100f extends along the Y-axis direction, the rear flow path 100g extends obliquely from the Y-axis direction toward the + Z-axis direction.
  • the plate member 408 is arranged so as to be located inside the front flow path 100f.
  • a part of the fluid flowing through the intake pipe IP in the forward + Y-axis direction is taken into the first branch channel 100.
  • the vortex VT can be hardly formed.
  • the fluid flowing in the intake pipe IP flows in the ⁇ Y-axis direction, which is the opposite direction to the forward direction, and the fluid is taken into the second branch channel 200 from the third opening 220.
  • the fluid taken into the rear flow path 100g from the second opening 120 depends on the difference in inclination between the front flow path 100f and the rear flow path 100g.
  • a vortex VTa is easily formed around the branch position BP. The vortex VTa draws the fluid flowing from the third opening 220 toward the flow detector 300 toward the first branch channel 100a, and the second branch of the fluid taken into the rear channel 100g from the second opening 120. Since the flow into the road 200 is suppressed, the flow of the fluid flowing from the third opening 220 is not hindered.
  • the flow measuring device 14 has a structure that does not hinder the flow of the fluid flowing from the third opening 220 toward the flow detecting unit 300 when the fluid flows in the reverse direction in the intake pipe IP.
  • This is an effective structure in a flow measurement device in which the flow detection unit 300 performs measurement in both forward and reverse directions of the flow of the fluid flowing through the pipe IP.
  • the flow measuring device 10a according to the fourth embodiment shown in FIG. 8 is different from the flow measuring device 10 according to the first embodiment shown in FIG. 1 in that a plate-like member 402a is used instead of the plate-like member 402 and the plate-like member 404. Except for the configuration, the configuration is the same as the device configuration of the flow measurement device 10 of the first embodiment. Although the ends in the ⁇ Y-axis direction of the plate members 402 and 404 of the first embodiment are located at the ⁇ Y-axis end of the first branch channel 100, the present disclosure is limited to this. I can't. For example, as shown in FIG.
  • the end in the ⁇ Y axis direction of the plate member 402a may be located on the + Y axis direction side of the ⁇ Y axis direction end of the first distribution channel 100.
  • the flow measurement device 10a according to the fourth embodiment has the same effects as the first embodiment.
  • the flow measuring device 10b of the fifth embodiment shown in FIG. 9 is different from the flow measuring device 10 of the first embodiment shown in FIG. 1 in that the plate members 402b and 404 are used instead of the plate members 402 and 404. Except for having a plate-shaped member 404b, the configuration is the same as that of the flow rate measuring device 10 of the first embodiment. As shown in FIG. 9, the ends in the ⁇ Y-axis direction of the plate members 402b and 404b are located on the ⁇ Y-axis direction side of the ⁇ Y-axis side ends of the first branch channels 100. Is also good. That is, the plate-shaped member 402b and a part of the plate-shaped member 404b may be arranged so as to be located outside the first opening 110.
  • the flow measuring device 10b according to the fifth embodiment has the same effects as the first embodiment.
  • the flow measurement device 10c according to the sixth embodiment illustrated in FIG. 10 is different from the flow measurement device 10 according to the first embodiment illustrated in FIG. 2 in that the plate members 402c and 404 are used instead of the plate members 402 and 404. Except for having a plate-like member 404c, the configuration is the same as that of the flow rate measuring device 10 of the first embodiment.
  • the length in the X-axis direction of the plate-like member 402 and the plate-like member 404 in the first embodiment is a length that traverses the flow path cross section of the first branch channel 100 in the X-axis direction. Not limited to For example, as shown in FIG.
  • the length of the plate member 402c and the plate member 404c in the X-axis direction may be shorter than the length crossing the X-axis direction in the cross section of the first branch channel 100.
  • the plate-like member 402c and the plate-like member 404c are fixed to the inner wall surface of the first branch channel 100 on the + X-axis direction side.
  • the flow measurement device 10c according to the sixth embodiment has the same effects as the first embodiment.
  • the flow measuring device 10d of the seventh embodiment shown in FIG. 11 differs from the flow measuring device 10 of the first embodiment shown in FIG. 2 in that a plate member 402d is used instead of the plate member 402 and the plate member 404. Except for the configuration, the configuration is the same as the device configuration of the flow measurement device 10 of the first embodiment.
  • the plate-like member 402d has a shape that partitions the cross section of the first branch channel 100 into a lattice shape.
  • the flow measuring device 10d according to the seventh embodiment has the same effects as the first embodiment.
  • the flow measurement device 10e according to the eighth embodiment shown in FIGS. 12 and 13 is different from the flow measurement device 10 according to the first embodiment shown in FIGS. It is the same as the device configuration of the flow measurement device 10 of the embodiment.
  • the flow measuring device 10e has a structure ST on the ⁇ Z-axis direction side of the first branch channel 100.
  • the outer shape of the structure ST is a quadrangular prism shape.
  • the fluid whose flow direction is changed by colliding with the portion on the + Z axis direction side from the first opening 110 is provided.
  • the shape of the structure ST is not limited to that shown in FIG. 12 as long as it has a shape extending from the first opening 110 toward the ⁇ Z-axis direction.
  • the flow measurement device 12a according to the ninth embodiment illustrated in FIG. 14 is different from the flow measurement device 12 according to the second embodiment illustrated in FIG.
  • the configuration is the same as the device configuration of No. 12.
  • the flow measuring device 12a in addition to the protruding portion 502 protruding from the portion on the + Z axis direction side of the peripheral edge of the first opening 110, the flow measuring device 12a protrudes from the portion on the ⁇ Z axis direction side of the peripheral edge of the first opening portion 110. It has a protrusion 504.
  • the length of the protrusion 504 in the ⁇ Y axis direction is equal to the length of the protrusion 502 in the ⁇ Y axis direction.
  • the difference between the flow speeds of the flow UF and the flow DF is relatively small. It is possible to suppress the occurrence of bias in the flow rate taken into the tank. Therefore, since the vortex VT is less likely to be formed in the first branch channel 100, it is possible to suppress the deterioration of the detection accuracy of the flow rate detection unit 300 caused by obstructing the flow of the fluid to the second branch channel 200.
  • the flow measurement device 12b of the tenth embodiment shown in FIG. 15 is different from the flow measurement device 12 of the second embodiment shown in FIG.
  • the configuration is the same as the device configuration of No. 12.
  • the protruding portion 502 protruding from the + Z-axis side portion of the peripheral edge of the first opening 110 in addition to the protruding portion 502 protruding from the + Z-axis side portion of the peripheral edge of the first opening 110, the protruding portion protruding from the + Z-axis side portion of the peripheral edge of the second opening 120 A portion 506 is provided.
  • the flow measurement device 12c according to the eleventh embodiment illustrated in FIG. 16 is different from the flow measurement device 12 according to the second embodiment illustrated in FIG. 6 except that a protrusion 502c having a shape different from that of the protrusion 502 is provided. This is the same as the device configuration of the flow measurement device 12 of the second embodiment.
  • the shape of the protruding portion 502c as viewed from the ⁇ Z-axis direction side is a curved shape.
  • the flow measuring device 12c according to the eleventh embodiment has the same effects as the second embodiment.
  • the flow measurement device 12d according to the twelfth embodiment illustrated in FIG. 17 is different from the flow measurement device 12 according to the second embodiment illustrated in FIG. 6 in that a protrusion 502d having a different shape from the protrusion 502 is provided. This is the same as the device configuration of the flow measurement device 12 of the second embodiment.
  • the shape of the protruding portion 502d as viewed from the -Z axis direction side is a trapezoidal shape.
  • the flow measuring device 12d according to the twelfth embodiment has the same advantages as the second embodiment.
  • the flow measuring device 12e of the thirteenth embodiment shown in FIG. 18 is different from the flow measuring device 12 of the second embodiment shown in FIG. It is the same as the device configuration of the flow measurement device 12 of the embodiment.
  • the shape of the protruding portion 502e is a cylindrical shape having a through hole penetrating in the Y-axis direction.
  • the protruding portion 502e may have a shape in which the first branch channel 100 extends in the ⁇ Y-axis direction.
  • the flow measuring device 12e according to the thirteenth embodiment has the same effects as the second embodiment.
  • the flow measurement device 12f according to the fourteenth embodiment illustrated in FIG. 19 is different from the flow measurement device 12 according to the second embodiment illustrated in FIG. 5 except that the flow measurement device 12f includes a plate-shaped member 410 and a fourth opening 115. This is the same as the device configuration of the flow measurement device 12 of the second embodiment.
  • the end in the + Y-axis direction of the plate-shaped member 410 is arranged so as to be located within the range R.
  • the end in the ⁇ Y-axis direction of the plate-shaped member 410 is located at the end on the ⁇ Y-axis direction side of the first branch channel 100.
  • the fourth opening 115 is provided between the opening cross section CS at the branch position of the second branch channel 200 and the first opening 110, and opens in the + X-axis direction.
  • the fourth opening 115 is used for discharging dust and moisture accumulated in the first branch channel 100.
  • the flow measuring device 12f according to the fourteenth embodiment has the same advantages as the first and second embodiments.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)
  • Analytical Chemistry (AREA)
PCT/JP2019/022339 2018-08-24 2019-06-05 流量測定装置 Ceased WO2020039691A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112019004243.2T DE112019004243T5 (de) 2018-08-24 2019-06-05 Durchflussmesser
US17/181,261 US20210172780A1 (en) 2018-08-24 2021-02-22 Flowmeter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018157230A JP7068103B2 (ja) 2018-08-24 2018-08-24 流量測定装置
JP2018-157230 2018-08-24

Related Child Applications (1)

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US17/181,261 Continuation US20210172780A1 (en) 2018-08-24 2021-02-22 Flowmeter

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WO2020039691A1 true WO2020039691A1 (ja) 2020-02-27

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PCT/JP2019/022339 Ceased WO2020039691A1 (ja) 2018-08-24 2019-06-05 流量測定装置

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JP (1) JP7068103B2 (enExample)
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JP7068095B2 (ja) * 2018-08-14 2022-05-16 株式会社Soken 流量測定装置

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JPH10300545A (ja) * 1997-04-24 1998-11-13 Mitsubishi Electric Corp 感熱式流量センサ
JP2002005712A (ja) * 2000-06-16 2002-01-09 Hitachi Ltd 空気流量測定装置
JP2002005713A (ja) * 2000-04-17 2002-01-09 Denso Corp 空気流量測定装置
EP1221593A1 (en) * 2001-01-05 2002-07-10 NGK Spark Plug Company Limited Gas flow measurement device
JP2010261771A (ja) * 2009-05-01 2010-11-18 Denso Corp 空気流量測定装置
JP2013024654A (ja) * 2011-07-19 2013-02-04 Denso Corp 空気流量測定装置

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JPH10300545A (ja) * 1997-04-24 1998-11-13 Mitsubishi Electric Corp 感熱式流量センサ
JP2002005713A (ja) * 2000-04-17 2002-01-09 Denso Corp 空気流量測定装置
JP2002005712A (ja) * 2000-06-16 2002-01-09 Hitachi Ltd 空気流量測定装置
EP1221593A1 (en) * 2001-01-05 2002-07-10 NGK Spark Plug Company Limited Gas flow measurement device
JP2010261771A (ja) * 2009-05-01 2010-11-18 Denso Corp 空気流量測定装置
JP2013024654A (ja) * 2011-07-19 2013-02-04 Denso Corp 空気流量測定装置

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