JPS5848816A - Air flow meter - Google Patents
Air flow meterInfo
- Publication number
- JPS5848816A JPS5848816A JP14624381A JP14624381A JPS5848816A JP S5848816 A JPS5848816 A JP S5848816A JP 14624381 A JP14624381 A JP 14624381A JP 14624381 A JP14624381 A JP 14624381A JP S5848816 A JPS5848816 A JP S5848816A
- Authority
- JP
- Japan
- Prior art keywords
- air flow
- branch pipe
- flow rate
- air
- flow meter
- 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.)
- Pending
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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Abstract
Description
【発明の詳細な説明】
本発男は送風機、プロワおよび圧７縮機などの流体機織
に使用される空気流１計に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air flow meter used in fluid machines such as blowers, blowers, and compressors.
従来、現地に裾付けられた流体１幾誠例えば送風機の風
量を計測する場りには、その送ノ虱滅のモードルの成流
１直を測定し、この測定ｌｌＮをもとにした送風機の性
能曲線を用いてノＡ量を間接的に推定するか、まだは熱
１腺式風速計と使用してＡＬ庁の各位置の風速を測定し
、この測定直よシ風計を１λ算して連出していた。Conventionally, when measuring the air flow rate of a blower, for example, when measuring the air flow rate of a blower, the flow rate of the blower mode is measured, and the blower's flow rate is calculated based on this measurement. Either estimate the amount of A indirectly using the performance curve, or use a single-gland anemometer to measure the wind speed at each location of the AL office, and calculate the 1λ of the anemometer directly from this measurement. He kept coming out.
ところがこのような手段では、多大の労力と時間を必要
とし、常時送風量金倹刈して４祇ｇ浬を行うことは不０
］′能で、かつ測定精度が悪く、将に熱線式風速計を用
いたものはｔｊｉｌＪ定各自本が高浦になる欠点がある
。However, such a method requires a great deal of labor and time, and it is impossible to constantly reduce the amount of air flow and carry out 4 hours.
]', and the measurement accuracy is poor, and those using hot wire anemometers have the disadvantage that each person's own book will be published by Takaura.
本発明は上記にかんがみ送風量を聞手に演升し、表両で
かつ精度の良好な空気流量計を提供すること金目的とす
るもので、副足用風・ａに１次分岐台を接ｄすると共に
、この１次分岐菅ｖｃ２次分岐管を接続してノ虱盪を２
段階に分岐し、その２次分岐管内のノ載量を険昶するこ
とによシ％ ｉｊ訂ｄ己則、磁用ノ虱管の風道を計ＪＪ
することを侍舐とするものである。In view of the above, it is an object of the present invention to provide an air flow meter that can calculate the air flow rate to the listener and is both accurate and accurate. At the same time, connect this primary branch pipe to the VC secondary branch pipe to prevent corrosion.
By branching into stages and increasing the load in the secondary branch pipe, it is possible to increase the amount of air in the secondary branch pipe.
It is considered samurai to do so.
以下本発明の実施例を図面について説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図に分いて、■はダクトで、その中間に側足用ノ虱
ｇ１ａが設けらｎている。２は測定用ノ虱・ａｌａ内ｌ
こ設けらｎたオリフィス、３は、Ａ１］定用ノ虱ｇ１ａ
の外側に接続された１次分岐Ｌ ４は１次分岐管３に接
続された２次分岐゛ａ、５は２次分岐管４内に設けられ
た熱１式流量計である。In Fig. 1, ``■'' is a duct, and in the middle of the duct, a lateral foot g1a is provided. 2 is the measuring louse/ala inside
This provided orifice, 3, is A1] regular use g1a
The primary branch L 4 is connected to the outside of the primary branch pipe 3 . The secondary branch L 4 is connected to the primary branch pipe 3 , and 5 is a heat type flow meter provided inside the secondary branch pipe 4 .
このような調成からなる本実施例では、空息流量′ｆ：
１次分岐管３で静圧的に分岐し、さらに２次分岐’＃４
で動圧的に分岐した後に、熱線式流量計５により空気流
量を計測する。In this embodiment, which is configured in this way, the air flow rate 'f:
It branches statically at the primary branch pipe 3, and further branches into the secondary branch '#4.
After dynamically branching at , the air flow rate is measured by a hot wire flow meter 5.
第２図に示す曲の実施列は、測定用、砥ｇ ｌ−ａの外
１ｊｌｌＩに一端を取付けた１次分岐−Ｗ３Ａの曲端を
測足用ノ虱゛＠ｌａ内に、かつ送風方向に開口させ、ま
た一端金前記１次分岐１１３Ａ内に、かつ送風方向に開
口させた２次分岐１４Ａの也端金、移動自在に設けらｎ
だフロート７を内ノ釈する透明質のテーパｆｊ６のＦ瑞
に接続し、このテーパ・ａ６の上端に流量＋ｌＪ ｌ卸
孔１１を介して接１１光さｎた静圧７１１２の他端を１
次分岐管３ＡＫ接、１恍しだ構成からなり、前ｉ己テー
パａ６は目盛９を付する枠（４）ＩＯ内に設置されてい
る。このような構成からなる実施例では、空λζ流量を
１次分岐０３Ａおよび２次分肢・ａ４Ａでそれぞれ動圧
的に分岐した麦に、フロート７の上下動により空気流量
を１什副する。The execution sequence of the song shown in Fig. 2 is for measurement, with one end attached to the outside of the grinding wheel g l-a, the curved end of W3A is placed inside the foot measuring hole ゛@la, and the wind direction is The end of the secondary branch 14A, which is opened in the direction of air flow and is opened in the primary branch 113A at one end and in the direction of air blowing, is movably provided.
The other end of the static pressure 7112 connected to the upper end of this taper a6 through the hole 11 with a flow rate of +lJ is 1.
It consists of a secondary branch pipe 3AK connected and 1 parallel configuration, and the front i taper a6 is installed in a frame (4) IO with a scale 9 attached. In the embodiment having such a configuration, one part of the air flow rate is supplied to the wheat which is dynamically branched by the primary branch 03A and the secondary branch a4A by the vertical movement of the float 7.
上記両人、爪側において、ダクト１内のノ虱祉すなわち
Ｊ定用風ｉｌａ内のノ虱遺は１次分岐α３゜３Ａ内の１
次分岐風量にほぼ比例した流量となシ、１次分岐α３，
３Ａ内の１次分肢風計は２次分岐管４，４Ａのそ柱ぞれ
の２次分岐ｉｔ 、ｉｆ ｖこほぼ比例した流量となる
。したがって２次分岐風量はダクト内の、載着にほぼ比
例した凍着となるので、前ｉ己２次分肢ノ虱ｉ金ｔｌｌ
１１足することによシダクト内の風量全検知することが
できる。For both of the above, on the claw side, the damage in duct 1, that is, the damage in J regular wind ila, is 1 in the primary branch α3゜3A.
The flow rate is almost proportional to the secondary branch air volume.The primary branch α3,
The flow rate of the primary branch wind gauge in 3A is approximately proportional to the secondary branches it and if v of the secondary branch pipes 4 and 4A, respectively. Therefore, the secondary branch air volume is almost proportional to the freezing in the duct.
By adding 11, the total air volume inside the duct can be detected.
第３図はさらに曲の犬ＭρＵ金示すもので、目盛９を有
する枠体１０内に移動自圧のフロート７（！−内蔵する
透明質のテーパｄ６ｒ設置直し、このテーパ管６の上・
瑞には流量、ｂ’Ｊ １ｊｌ孔１１を介して静圧・ａ１
２の一端が連１服され、その龍４ｉ１２ａは枠体ＩＯの
下部に取付けられたブラケツ）１４を貫通して、分岐１
１６の送風方向（紙面に討し垂直方向）と直交する方向
すなわち非送風方間に開口されている。またテーパａ６
の下端には総圧ｕ１３の一端が連通され、その１也端１
３ａはブラケット１４を貫通し、かつ開口部１５を介し
て分岐管１６の送風方向に開口されている。FIG. 3 further shows the music of the dog MρU, in which a floating self-pressure float 7 (!--with built-in transparent taper d6r) is reinstalled in the frame 10 having a scale 9, and the tapered tube 6 is
Flow rate, b'J 1jl through hole 11, static pressure, a1
One end of 2 is connected to the branch 1, and the dragon 4i12a passes through the bracket 14 attached to the lower part of the frame IO.
It is opened in a direction perpendicular to the 16 air blowing directions (perpendicular to the plane of the paper), that is, in the non-air blowing direction. Also taper a6
One end of the total pressure u13 is communicated with the lower end of the
3 a passes through the bracket 14 and opens in the direction of air flow from the branch pipe 16 via an opening 15 .
上記分岐管１６は第４図に示すように１静圧ａ部１６ｂ
と総圧管、！Ａ１６ａから７２ニジ、その静圧８部１６
ｂの端部は流量１０１」岬孔１７を介して風量ｕｌｌ定
用ダクト（図示せず）の非送虱方向に開口され、総圧・
８部１６ａの端部は開口部１８ｆｒ、介して前記ダクト
の送ノ虱方向に開口されている。The branch pipe 16 has one static pressure section a 16b as shown in FIG.
And total pressure pipe,! 72 Niji from A16a, its static pressure 8 parts 16
The end of b is opened in the non-transmission direction of a duct (not shown) for regulating the air volume ULL through the cape hole 17, and the total pressure
The end portion of the 8-part 16a is opened in the direction of the feed line of the duct via an opening 18fr.
次に上記のような構成からなる本実施例の作用について
ｌｉ明する。Next, the operation of this embodiment configured as described above will be explained.
流量、ｊｌＪ ＋１Ｉｌｌ孔１１はテーパｕ６に比べて
十分に小さいので、総圧と静圧の圧力差は流！ １ｆｆ
ｔｌ 脚孔１１の前後部にほとんど作用する。葡、この
ため流量制御孔１１を流通する風速は４圧１１３の開口
部１５における風速とほぼ同一となる。同様に分岐管１
６の流量制御孔１７は分岐１１６に比べて十分に小さい
ので、全圧と静圧の圧力肩は前ｄ白ｈ１ｊ呻孔１７の前
後部にほとんど作用するから、 （ＩｉｌＪ御孔１７全
流速する風速は分岐管１６の総圧管部１６ａの開口部１
８における風速とほぼ同一となる。Flow rate, jlJ +1Ill hole 11 is sufficiently smaller than taper u6, so the pressure difference between the total pressure and static pressure is the flow! 1ff
tl It mostly acts on the front and rear of the leg hole 11. Therefore, the wind speed flowing through the flow control hole 11 is approximately the same as the wind speed at the opening 15 of the four pressure 113. Similarly, branch pipe 1
Since the flow rate control hole 17 of No. 6 is sufficiently small compared to the branch 116, the pressure shoulders of the total pressure and static pressure mostly act on the front and rear parts of the front d white h 1 j groaning hole 17. The wind speed is determined by the opening 1 of the total pressure pipe section 16a of the branch pipe 16.
It is almost the same as the wind speed at 8.
したがってテーパ・θ６内の風量は分岐管１６内の風量
に比例した流量となｐ、分岐１１６内の風量はダクト内
の風量に比ρりした流量となる。そこでテーバ看６内の
バイパスノ虱量に１音率を乗じた目盛９を枠体ｌＯに施
すことによシ、ダクト内の風量を・検知することが可能
である。すなわちフロート７はテーパ菅６内を流血する
総圧と静圧との圧力差（動圧）に伴って上下動されるた
め、フロート７の位＋１を目盛９金介して読取ることに
より風量ｆｒ：測定することができる。Therefore, the air volume in the taper θ6 is a flow rate p that is proportional to the air volume in the branch pipe 16, and the air volume in the branch 116 is a flow rate that is proportional to the air volume in the duct. Therefore, it is possible to detect the air volume in the duct by providing a scale 9 on the frame 10, which is the amount of bypass air in the taber 6 multiplied by one tone. That is, since the float 7 is moved up and down in accordance with the pressure difference (dynamic pressure) between the total pressure and the static pressure of blood flowing inside the taper tube 6, by reading the digit of the float 7 +1 through the 9-karat gold scale, the air volume fr: can be measured.
第５図ないし第７図は第３図に示す空気流量計の訣用列
金示したもので、第５図および第６図は空気流量計１９
を送風機２０の吐出１１１１Ｊ ２０ ｂおよび吸込側
２０ａに、第７図はダクト２１の中間にそれぞれ取付け
た場合である。Figures 5 to 7 show the basic columns of the air flow meter shown in Figure 3, and Figures 5 and 6 show the air flow meter 19.
are attached to the outlet 1111J 20 b and suction side 20a of the blower 20, and FIG. 7 shows the case where they are attached to the middle of the duct 21.
以上説１男したように本発力じよれば、風量を常に目Ｉ
Ｊｉ！により険知することができるから、計Ｊｌ＋が容
易であり、流本議械の運転管理に使用して非常に１更利
である。また風遣を測定用風Ｈから２段階にバイパスさ
せ、１設当９のバイパス比率を小さくすることにより、
測定両度の向上ｒはかることができる。さらに構造が比
較的に簡単であシ、安１曲に製１乍することがｏＪ ｌ
ｉＥである。According to the original theory, as stated above, the air volume should always be monitored.
Ji! Therefore, the total Jl+ is easy to use, and it is very convenient to use it for operation management of the main assembly. In addition, by bypassing the wind blowing in two stages from the measuring wind H, and reducing the bypass ratio of 9 per setting,
Improvements in measurement accuracy can be measured. Furthermore, the structure is relatively simple, and it is easy to manufacture one piece at a time.
It is iE.
第１図ないし第３図は本発明の空気流量計の実施例を示
す］＠面図、第４図は第３図の分岐管の側面図、第５図
ないし第７図は第３図に示す空気流量計の吐用例を示す
説明図である。
１ａ・・・測定用ノ虱計、３，３Ａ・・・１次分岐’ｆ
ｉ−４＊４Ａ・・・２次分：ｔａ、６・・・チー−”ｆ
ｌ、７・・・フロート、１２・・・静圧ｉ、１３・・・
４あ圧管、１６・・・分岐管、１６ａ・・・総圧・８部
、１６ｂ・・・静圧８部。
不２図
￥３ｓ 図
９
ト
ａ
第 ７ 図
ｚｒ ｒｑ ｚｔFigures 1 to 3 show an embodiment of the air flow meter of the present invention] Figure 4 is a side view of the branch pipe in Figure 3, Figures 5 to 7 are Figure 3. FIG. 2 is an explanatory diagram showing an example of discharge of the air flow meter shown in FIG. 1a... Measuring louse meter, 3, 3A... Primary branch 'f
i-4*4A...Second order: ta, 6...Chi-"f
l, 7...Float, 12...Static pressure i, 13...
4 Pressure pipe, 16... Branch pipe, 16a... Total pressure 8 parts, 16b... Static pressure 8 parts. Figure 9 Toa Figure 7 zr rq zt
Claims (1)
と共に、この１次分岐ｇに２次分岐菅全羨絖して風量を
２段階に分岐し、その２次分岐庁内の風量を検知するこ
とによシ、前記測定用）虱ｇの、載量を計測すること金
１階徴とする空気流量計。 ２、＄動自圧に設けたフロートを内蔵し、かつこのフロ
ートの移動を外部から目尻可能に調成したテーバ・ａの
上、下部に静圧ａおよび総圧管の一端をそれぞれ連通す
ると共に、その容管の他端を静圧・ｇ部および総圧管部
からなる分岐管の非送風方向および送風方向にそれぞれ
開口させ、前記静圧・Ｕ部および総圧管部の端部を風量
測定用ダクトの押送ノ虱方向および送風方向にそれぞれ
開口させたことを特徴とする特許請求の範囲第１項記載
の空気流量計。[Scope of Claims] 1. The first branch 11ti is connected to the pipe and metal for the purpose of measurement 7, and the air volume is divided into two stages by connecting the first branch to the second branch g. An air flow meter whose first feature is to measure the load by detecting the air volume within the secondary branch office. 2. The static pressure a and one end of the total pressure pipe are communicated with the upper and lower parts of the Taber-a, which has a built-in float provided for dynamic automatic pressure and whose movement can be controlled from the outside, and The other end of the container pipe is opened in the non-blowing direction and the blowing direction of the branch pipe consisting of the static pressure/G part and the total pressure pipe part, respectively, and the ends of the static pressure/U part and the total pressure pipe part are connected to the air volume measuring duct. 2. The air flow meter according to claim 1, wherein the air flow meter is opened in the direction of the air flow and in the direction of the air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14624381A JPS5848816A (en) | 1981-09-18 | 1981-09-18 | Air flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14624381A JPS5848816A (en) | 1981-09-18 | 1981-09-18 | Air flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5848816A true JPS5848816A (en) | 1983-03-22 |
Family
ID=15403327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14624381A Pending JPS5848816A (en) | 1981-09-18 | 1981-09-18 | Air flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848816A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416234C (en) * | 2006-09-30 | 2008-09-03 | 浙江麦姆龙仪表有限公司 | Measuring method and its device for external screw sampling of pipeline gas flow |
| CN100416233C (en) * | 2006-09-30 | 2008-09-03 | 浙江麦姆龙仪表有限公司 | Measuring method and its device for external leading sampling of pipeline gas flow |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442172A (en) * | 1977-09-10 | 1979-04-03 | Sanfuremu Akiyumu Kk | Flow meter |
-
1981
- 1981-09-18 JP JP14624381A patent/JPS5848816A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442172A (en) * | 1977-09-10 | 1979-04-03 | Sanfuremu Akiyumu Kk | Flow meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416234C (en) * | 2006-09-30 | 2008-09-03 | 浙江麦姆龙仪表有限公司 | Measuring method and its device for external screw sampling of pipeline gas flow |
| CN100416233C (en) * | 2006-09-30 | 2008-09-03 | 浙江麦姆龙仪表有限公司 | Measuring method and its device for external leading sampling of pipeline gas flow |
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