WO2006120848A1 - 流量測定装置 - Google Patents
流量測定装置Info
- Publication number
- WO2006120848A1 WO2006120848A1 PCT/JP2006/308179 JP2006308179W WO2006120848A1 WO 2006120848 A1 WO2006120848 A1 WO 2006120848A1 JP 2006308179 W JP2006308179 W JP 2006308179W WO 2006120848 A1 WO2006120848 A1 WO 2006120848A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- flow
- sub
- introduction
- flow path
- Prior art date
Links
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
-
- 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
Definitions
- the present invention relates to a flow measurement device, for example, a small flow measurement device used in medical equipment such as industrial equipment for monitoring air flow in a factory, treatment equipment for sleep apnea syndrome, and the like.
- a flow rate measuring device provided with a sub-flow channel
- a flow rate module in which a flow restrictor is provided in a main flow channel
- a combustion gas flow rate measuring device including a first main pipeline block and a second main pipeline block (see Patent Document 2).
- Patent Document 1 Special Table 2003-523506
- Patent Document 2 Japanese Patent No. 3340655
- an object of the present invention is to provide a flow rate measuring device that is small and has high measurement accuracy in which dust or the like is difficult to enter, and has a small pressure loss.
- a flow rate measuring apparatus includes a main flow pipe having a main flow path through which a fluid to solve the above problems, an orifice provided in the main flow path for restricting the flow of the fluid, and the main flow pipe. And a sub-flow path provided with a sub-flow path whose one end communicates with an inlet provided on the upstream side of the orifice and whose other end communicates with a discharge port provided on the downstream side of the orifice.
- the sub-flow path communicates with the inlet having the first branch point on the upstream side and the introduction flow path having the second branch point on the downstream side, and the introduction at the second branch point on the upstream side.
- a first sub-flow path that branches off from the flow path and is parallel to the main flow path, and that communicates with the discharge port on the downstream side, and the second branch point on the upstream side from the introduction flow path.
- a second sub-port formed to branch and intersect the main flow path And road communicates upstream side to the downstream side of the second sub flow path, thereby placing the flow rate detecting element, the detection flow passage downstream side communicating with the discharge port, there as a force consisting configuration.
- the fluid flows twice at the first and second branch points. Therefore, it is possible to reduce the flow velocity to the measurable region of the flow rate detection element while maintaining the miniaturization of the device without causing a large pressure loss. As a result, the output linearity of the flow rate detecting element can be utilized, and a small flow rate measuring device with high measurement accuracy can be obtained. In addition, the two diversion actions make it difficult for dust or the like mixed in the fluid to enter the detection flow path, thereby avoiding problems due to dust or the like.
- the flow rate measuring device is provided integrally with the main flow pipe having a main flow path through which a fluid flows, an orifice provided in the main flow path for restricting the flow of the fluid, and the main flow pipe.
- the sub-flow path block is provided with a sub-flow path communicating with the pair of discharge ports, and the sub-flow force upstream communicates with the introduction port, which is the first branch point, and the downstream side is the second branch point.
- the upstream side branches from the introduction channel at the second branch point and is parallel to the main channel, and the downstream side is a pair of the discharge ports.
- the power flow detection element is arranged to communicate with the downstream side of the pair of second sub-flow channels, and the detection flow channel with which the downstream side communicates with the pair of discharge ports has a powerful configuration.
- the cross-sectional area of the first sub-channel may be adjustable.
- the flow range flowing through the detection flow path can be adjusted by adjusting the flow path cross-sectional area of the first sub flow path, so that the selection range of usable flow rate detection elements is expanded.
- an introduction channel in which an introduction port and a second branch point located on the upstream side of the introduction channel are located on the same vertical line, a discharge port and a discharge channel, May be provided in parallel with the introduction flow path located on the same vertical line.
- the mold since the introduction flow path and the discharge flow path are aligned in the same direction, the mold can be removed at the same time, so that it can be integrally formed with the mainstream pipe.
- the introduction flow path communicating with the introduction port has a substantially L-shaped cross section so that a part of the fluid that flows in flows in the direction opposite to the flow of the main flow path. May be.
- a part of the fluid that has flowed into the introduction flow path flows in the direction opposite to the flow of the main flow path, and the remaining part flows out to the discharge flow path. For this reason, dust etc. There is an effect that it becomes even more intrusive, and it is possible to more reliably avoid problems based on dust and the like.
- FIG. 1A and FIG. 1B are a perspective view and a left side view showing an embodiment of a flow rate measuring device according to the present invention.
- FIG. 2 is an exploded perspective view of the flow rate measuring device shown in FIG.
- FIG. 3A and FIG. 3B are a cross-sectional view and a plan view of the flow rate measuring device shown in FIG.
- FIG. 4 is a cross-sectional perspective view of the flow rate measuring apparatus shown in FIG.
- FIG. 5A and FIG. 5B are a plan view of the flow rate measuring device shown in FIG. 1 and a plan view showing a state where a cover is removed.
- FIG. 6 is a perspective view of the flow rate measuring device shown in FIG. 5B.
- FIG. 7 is a perspective view of the flow rate measuring device shown in FIG. 5B as seen at different angular forces.
- FIG. 8 is a plan sectional perspective view of FIG. 7.
- FIG. 9 is a plan sectional perspective view of FIG. 7 cut at a different position from FIG.
- FIG. 10 is a plan sectional perspective view of FIG. 7 cut at a different position from FIG.
- FIG. 11 is a plan sectional perspective view of FIG. 7 cut at a different position from FIG.
- FIG. 12A to 12D are plan sectional views, and FIG. 12E is a front view showing a cutting position.
- FIGS. 13A to 13D are side cross-sectional views
- FIG. 13E is a plan view showing a cutting position.
- FIG. 14 is a perspective view schematically showing the flow path of the flow rate measuring device according to the present invention.
- FIG. 15 is a perspective view schematically showing a flow path of the flow rate measuring device according to the present invention.
- FIG. 16 is a perspective view schematically showing a flow channel according to another embodiment of the present invention. Explanation of symbols
- the flow measuring device includes a base 10 integrally formed with a sub-flow channel block 20 that forms a sub-flow channel on the outer peripheral surface of the main flow tube 11, and a central portion.
- the base 10 is provided with a cross-shaped orifice 13 at the center of the inner peripheral surface of the main flow path 12 passing through the main flow pipe 11.
- the first adjustment ribs 14 and 14 are projected from the inner peripheral surface provided with the orifice 13 so as to face each other vertically, while the second adjustment ribs 15 and 15 are projected so as to face each other right and left. It is.
- the first and second adjusting ribs 14 and 15 are provided to correct the non-uniform flow velocity distribution and perform more accurate flow rate measurement.
- the seal plate 30 also serves as an insulating material such as rubber, and serves to prevent fluid leakage and protect the circuit board 40.
- the flow rate detecting element 41 attached to the center of the lower surface detects data, and the control circuit 42 provided on the upper surface converts the flow rate of the main flow path 12 based on the data and outputs it.
- the flow rate detecting element 41 include, but are not limited to, a thermal flow rate detecting element and a hot wire type flow rate detecting element.
- the secondary flow path formed in the secondary flow path block 20 is located at a position facing the left and right of the inner peripheral surface located near the upstream side of the orifice 13.
- the sub-flow channel is formed so as to be line-symmetric, and has a substantially plane L-shaped introduction vertical groove 22 for raising the fluid flowing in from the introduction ports 21, 21. , 22 are provided. Then, at the second branch point 20a located at the upper end of the introduction vertical groove 22, a first sub-channel 23 formed in parallel with the main channel 12 and a direction orthogonal to the main channel 12 are formed. Divided into second subchannel 24. The first sub-channel 23 communicates with a discharge vertical groove 27 having a substantially L-shape in a plane over a partition wall 23a located at the center.
- the second sub-channel 24 and the other second sub-channel 24 provided so as to be line-symmetric with the first junction 20 They merge at a and communicate with a third flow path 25 that is a detection flow path formed in parallel with the main flow path 12.
- the protrusion 29a is formed so as to face the middle part of the opposed surface, and becomes a narrow detection area. /! This is to correct the non-uniform flow by narrowing the flow path.
- a third branch point 20c located on the downstream side of the third flow path 25 the left and right branches into a pair of fourth sub flow paths 26 and 26, respectively.
- the fourth sub-channel 26 merges with the downstream side of the first sub-channel 23 at the second junction 20d located on the downstream side thereof, and communicates with the discharge vertical groove 27. Finally, it communicates with the main flow path 12 through the discharge port 28 located downstream of the discharge vertical groove 27.
- the fluid is diverted through the inlet 21 that is the first branch point, so that dust or the like is unlikely to enter the introduction vertical groove 22.
- the introduction vertical groove 22 communicating with the introduction port 21 is formed in a substantially L-shaped plane so that the fluid flowing from the introduction port 21 flows in the direction opposite to the flow of the main flow path 12. Since dust, liquid, and the like having a large mass are unlikely to flow in the reverse direction, the third passage 25, which is the detection channel, makes it more difficult for dust and the like to enter.
- discharge longitudinal groove 27 has a substantially L-shaped cross section is to ensure a smooth flow in consideration of the balance between the upstream side and the downstream side.
- the introduction vertical groove 22 and the discharge vertical groove 27 are formed in the same direction so as to be arranged side by side, it is possible to perform die cutting at the same time.
- the flow channel block 20 can be integrally molded. For this reason, it would be advantageous to obtain a flow measurement device with high assembly accuracy with fewer parts and fewer assembly steps.
- the fluid that has also flowed upstream of the main flow path 12 hits the orifice 13, thereby reducing the influence of the drift. Then, a part of the fluid with less drift flows into the introduction vertical groove 22 from the introduction port 21 which is the first branch point. At this time, since the dust mixed in the fluid has a large mass, most of the dust flows downstream according to the flow of the main flow path 12.
- the introduction vertical groove 22 has a substantially L-shape in plan view, a part of the fluid that flows in flows in the direction opposite to the flow of the main flow path 12, but dust or the like has a mass compared to gas. Big so reverse Difficult to flow in the direction. For this reason, dust or the like flows from the second branch point 20a to the discharge vertical groove 27 via the first sub-passage 23. Therefore, the fluid flowing into the second sub flow path 24 from the second branch point 20a is extremely less contaminated with dust and the like, and the flow rate detecting element 41 is hardly contaminated.
- the fluid that has flowed into the second sub-channel 24 merges with the fluid that flows through the other second sub-channel 24 at the first confluence 20b, and then flows into the third channel 25 to face the protruding portions 29a,
- the flow rate is measured by passing through the flow rate detection element 41 arranged between 29a.
- the fluid separated into the left and right at the third branch point 20c located on the downstream side of the third sub-channel 25 flows from the fourth sub-channel 26 to the upstream side of the discharge longitudinal groove 27, and the second junction 20d. Then, it joins with the fluid that has flowed from the introduction longitudinal groove 27 through the first subchannel 23. Then, the joined fluid descends along the discharge longitudinal groove 27 and flows out from the discharge outlet 28 to the main flow path 12.
- the flow rate detection element 41 detects the flow rate of the fluid passing therethrough, for example, by detecting a change in voltage based on the amount of heat taken away by the fluid passing at a predetermined speed. According to this embodiment, since the speed of the fluid passing through the third sub-channel 25 can be set low, a flow rate detecting element that can measure only a low-speed fluid can be used and can be manufactured at low cost.
- the flow rate of the third sub-channel 25 is adjusted by adjusting the height and area of the partition wall 23a in the first sub-channel 23 or the cross-sectional area of the second sub-channel 24.
- the flow rate can be adjusted to a suitable level.
- a pair of sub-channels are provided symmetrically so that the fluids are merged. Therefore, even if the velocity distribution of the fluid in the main channel is not uniform, it is averaged. Measurement accuracy is improved.
- the flow rate measuring device is applicable not only when measuring the flow rate of gas but also when measuring the flow rate of liquid.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0611536-5A BRPI0611536A2 (pt) | 2005-05-02 | 2006-04-19 | dispositivo de medição de vazão |
EP06732086.1A EP1879004B1 (en) | 2005-05-02 | 2006-04-19 | Flow rate measuring device |
US11/913,291 US7574908B2 (en) | 2005-05-02 | 2006-04-19 | Flow rate measuring device |
AU2006245224A AU2006245224B2 (en) | 2005-05-02 | 2006-04-19 | Flow rate measuring device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005134239A JP3870969B2 (ja) | 2005-05-02 | 2005-05-02 | 流量測定装置 |
JP2005-134239 | 2005-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006120848A1 true WO2006120848A1 (ja) | 2006-11-16 |
Family
ID=37396361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/308179 WO2006120848A1 (ja) | 2005-05-02 | 2006-04-19 | 流量測定装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7574908B2 (ja) |
EP (1) | EP1879004B1 (ja) |
JP (1) | JP3870969B2 (ja) |
CN (1) | CN100533069C (ja) |
AU (1) | AU2006245224B2 (ja) |
BR (1) | BRPI0611536A2 (ja) |
WO (1) | WO2006120848A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8573051B2 (en) | 2008-09-01 | 2013-11-05 | Omron Corporation | Flow rate measurement device having an auxiliary passage arrangement that prevents liquid breaking into the detection passage |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5160809B2 (ja) * | 2007-05-08 | 2013-03-13 | Ckd株式会社 | 熱式流量計 |
JP5273950B2 (ja) * | 2007-06-08 | 2013-08-28 | アズビル株式会社 | 流量計 |
JP2008304396A (ja) * | 2007-06-08 | 2008-12-18 | Yamatake Corp | 流量計 |
WO2008152769A1 (ja) | 2007-06-08 | 2008-12-18 | Yamatake Corporation | 流量計 |
JP5003372B2 (ja) * | 2007-09-13 | 2012-08-15 | オムロン株式会社 | 流量測定装置 |
JP5339988B2 (ja) * | 2008-11-21 | 2013-11-13 | アズビル株式会社 | 分流式流量計及び流量制御装置 |
JP5272930B2 (ja) | 2009-07-01 | 2013-08-28 | オムロン株式会社 | 流量測定装置 |
JP5728841B2 (ja) | 2010-07-26 | 2015-06-03 | オムロン株式会社 | 流量測定用構造体および流量測定装置 |
JP2012026931A (ja) * | 2010-07-26 | 2012-02-09 | Omron Corp | 流量測定用構造体、および流量測定装置 |
JP5904959B2 (ja) | 2013-03-08 | 2016-04-20 | 日立オートモティブシステムズ株式会社 | 熱式空気流量計 |
EP3358315B1 (en) * | 2015-09-30 | 2022-10-12 | Hitachi Astemo, Ltd. | Physical quantity detection device |
EP3382351B1 (en) * | 2017-03-31 | 2019-10-09 | Ryusok Co., Ltd | Ultrasonic flow meter |
JP6686126B2 (ja) * | 2018-12-28 | 2020-04-22 | 日立オートモティブシステムズ株式会社 | 熱式流量計 |
CN110058046B (zh) * | 2019-04-23 | 2021-02-12 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | 一种基于对流传热的流体流速测量方法及装置 |
JP7097333B2 (ja) * | 2019-06-25 | 2022-07-07 | 日立Astemo株式会社 | 物理量検出装置 |
CN115096394B (zh) * | 2022-08-22 | 2022-11-29 | 厚爱医疗仪器(江苏)有限公司 | 一种流体类仪表工作时的流通量测试装置 |
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2005
- 2005-05-02 JP JP2005134239A patent/JP3870969B2/ja not_active Expired - Fee Related
-
2006
- 2006-04-19 WO PCT/JP2006/308179 patent/WO2006120848A1/ja active Application Filing
- 2006-04-19 EP EP06732086.1A patent/EP1879004B1/en active Active
- 2006-04-19 CN CNB2006800202257A patent/CN100533069C/zh active Active
- 2006-04-19 US US11/913,291 patent/US7574908B2/en active Active
- 2006-04-19 BR BRPI0611536-5A patent/BRPI0611536A2/pt active Search and Examination
- 2006-04-19 AU AU2006245224A patent/AU2006245224B2/en not_active Ceased
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JPS5710414A (en) | 1980-06-23 | 1982-01-20 | Toshiba Corp | Thermal type flow meter |
JPS5977027U (ja) * | 1982-11-15 | 1984-05-24 | 株式会社エステック | マスフロ−流量計 |
JPH0943020A (ja) * | 1995-08-03 | 1997-02-14 | Hitachi Ltd | 発熱抵抗式流量測定装置 |
JPH1054741A (ja) * | 1996-08-09 | 1998-02-24 | Yamatake Honeywell Co Ltd | 流量検出装置 |
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JP2000274662A (ja) | 1999-03-25 | 2000-10-03 | Tokyo Gas Co Ltd | 誘導路 |
JP2001174305A (ja) * | 1999-10-06 | 2001-06-29 | Ngk Spark Plug Co Ltd | 流量及び流速測定装置 |
JP2003523506A (ja) | 2000-02-16 | 2003-08-05 | ハネウェル・インターナショナル・インコーポレーテッド | 流量モジュールおよび一体化された流れ制限器 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8573051B2 (en) | 2008-09-01 | 2013-11-05 | Omron Corporation | Flow rate measurement device having an auxiliary passage arrangement that prevents liquid breaking into the detection passage |
Also Published As
Publication number | Publication date |
---|---|
CN101194145A (zh) | 2008-06-04 |
BRPI0611536A2 (pt) | 2010-09-21 |
EP1879004A1 (en) | 2008-01-16 |
JP2006308518A (ja) | 2006-11-09 |
US7574908B2 (en) | 2009-08-18 |
CN100533069C (zh) | 2009-08-26 |
US20090078039A1 (en) | 2009-03-26 |
JP3870969B2 (ja) | 2007-01-24 |
EP1879004B1 (en) | 2016-07-20 |
AU2006245224A1 (en) | 2006-11-16 |
EP1879004A4 (en) | 2009-06-03 |
AU2006245224B2 (en) | 2009-12-10 |
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