JPH0224518A - Electronic balance having heat removing device - Google Patents
Electronic balance having heat removing deviceInfo
- Publication number
- JPH0224518A JPH0224518A JP17276288A JP17276288A JPH0224518A JP H0224518 A JPH0224518 A JP H0224518A JP 17276288 A JP17276288 A JP 17276288A JP 17276288 A JP17276288 A JP 17276288A JP H0224518 A JPH0224518 A JP H0224518A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- balance
- electronic balance
- electronic
- section
- 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
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 8
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000005303 weighing Methods 0.000 description 10
- 239000000758 substrate Substances 0.000 description 4
- 241000283074 Equus asinus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は除熱機構を有する秤量装置に係り、特にヒート
パイプを用いた除熱機構を有する電子天秤に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a weighing device having a heat removal mechanism, and more particularly to an electronic balance having a heat removal mechanism using a heat pipe.
重量を精密に測定する装置の一つとして電子平衡式の秤
量装置である電子天秤がある。この装置の構成及び作動
状態の概略を、本発明の詳細な説明する第１図を利用し
て先ず説明する。An electronic balance, which is an electronic balance type weighing device, is one of the devices for accurately measuring weight. The structure and operating state of this device will first be explained with reference to FIG. 1, which provides a detailed explanation of the present invention.
１は電子天秤本体、２はこの本体の一部を構成する秤量
室であり、通常はガラスケースとして構成しである。測
定に当たっては、秤量皿３上に載置された秤量物の荷重
はこの秤量室２の床５を挿通して配置されたビン６及び
このピンを有するアーム４を介して機構室１７内ロバ−
パル機構１６に伝達される。Reference numeral 1 designates an electronic balance main body, and 2 designates a weighing chamber that constitutes a part of this main body, and is usually configured as a glass case. During measurement, the load of the object to be weighed placed on the weighing pan 3 is transferred to the robot in the mechanism chamber 17 via the arm 4 having the pin and the vial 6 inserted through the floor 5 of the weighing chamber 2.
The signal is transmitted to the pulse mechanism 16.
このロバ−パル機構１６は上部副棒７と、この副枠７に
平行に位置する下部副枠８と、浮枠９〜と、これら各副
枠７．８及び浮枠９と本体固定部とを板バネ１０ａ、、
１０ｂ、１０ｃ、１０ｄをもって接続することにより構
成しである。前記アーム４はこのロバ−パル機構１６に
接続している。符号１２はビームであって、板バネ１３
を支点として揺動するよう構成してあり、その一端は板
バネ１１を介して浮枠９に接続し、他端は電磁部１４に
接続している。This donkey pal mechanism 16 includes an upper sub-rod 7, a lower sub-frame 8 located parallel to this sub-frame 7, a floating frame 9~, each of these sub-frames 7.8 and floating frame 9, and a main body fixing part. The leaf spring 10a,
10b, 10c, and 10d are connected. The arm 4 is connected to this donkey pal mechanism 16. Reference numeral 12 is a beam, and a plate spring 13
One end is connected to the floating frame 9 via a leaf spring 11, and the other end is connected to the electromagnetic section 14.
この構成において、秤量物の荷重はアーム４、ロバ−パ
ル機構１６、板バネ１１を経てビーム１２に至り、支点
１３を中心としてビーム１２を揺動するよう作用する。In this configuration, the load of the weighed object reaches the beam 12 via the arm 4, the donkey pal mechanism 16, and the leaf spring 11, and acts to swing the beam 12 about the fulcrum 13.
このビーム１２の変位は図示しない位置センサにより検
出され、このビーム−１２の変位信号はサーボ機構（図
示せず）により増幅されて変位に対応した電流が電磁部
１４に出力され、ビーム１２を秤量物の荷重に抗して平
衡させる。電磁部で発生する力と電磁部に供給する電気
量とは正確に比例するので、この電気量を電圧として出
力することにより秤量物の荷重を測定表示する。The displacement of the beam 12 is detected by a position sensor (not shown), and the displacement signal of the beam 12 is amplified by a servo mechanism (not shown), and a current corresponding to the displacement is output to the electromagnetic section 14 to weigh the beam 12. To counterbalance the load of something. Since the force generated by the electromagnetic section and the amount of electricity supplied to the electromagnetic section are exactly proportional, the load of the weighed object is measured and displayed by outputting this amount of electricity as a voltage.
以上に示した電子天秤は、例えば１μｇまたはこれ以下
の極めて僅かの重量を測定することが可能である。然し
、このような微量の測定を可能とするため、装置内部の
機構は敏感に作動し、振動、温度、空気の流動等の外部
の影響を受は易くなっている。The electronic balance described above is capable of measuring extremely small weights of, for example, 1 μg or less. However, in order to enable measurement of such minute amounts, the internal mechanism of the device operates sensitively and is easily affected by external influences such as vibration, temperature, and air flow.
特に空気の流動による影響は深刻であり、秤量皿が煽ら
れて測定が不正確になったり測定不能となる等の事態予
測される。この為、重量測定時には秤量室２は密閉して
外界から遮断するようになっている。In particular, the influence of air flow is serious, and it is predicted that the weighing pan will be agitated, making measurements inaccurate or impossible. For this reason, during weight measurement, the weighing chamber 2 is sealed and isolated from the outside world.
然し、装置の測定精度が向上し、より微量な測定が可能
となると、装置外部の影響のみでなく、装置内部の僅か
な空気の流動も測定精度に大きな影響を与えるようにな
ってきている。However, as the measurement accuracy of the device improves and it becomes possible to measure even smaller amounts, not only the influence from the outside of the device, but also the slight flow of air inside the device has come to have a large impact on the measurement accuracy.
装置内部に空気の流動が生じるのは、装置内部の温度分
布が均一ではなく装置内に空気の対流現象が生じるため
である。より具体的には、電子天秤の機構室１７内に配
置した電磁部１４及び、この電磁部１４よりも発熱量は
少ないが制御部の回路基板（図示せず）等から発熱し、
この熱により装置内に対流現象が生じる。この空気の流
動は機構室１７内のみでなく、ビン６とピン６用の挿通
穴５ａとの間の隙間を介して秤量皿３に向かって上昇し
、秤量皿３を煽ることになる。このため、従来よりこの
上昇流を防ぐための各種の構成が提案されているが、装
置の機構が複雑となったり、また比較的単純な構成では
その効果が僅かであるなど、問題の根本的な解決はなさ
れていない。The reason why air flows inside the device is that the temperature distribution inside the device is not uniform and air convection occurs inside the device. More specifically, heat is generated from the electromagnetic section 14 disposed in the mechanism chamber 17 of the electronic balance, and the circuit board (not shown) of the control section, etc., although the amount of heat generated is smaller than that of the electromagnetic section 14.
This heat causes a convection phenomenon within the device. This flow of air not only moves inside the mechanism chamber 17, but also rises toward the weighing pan 3 through the gap between the bottle 6 and the insertion hole 5a for the pin 6, and agitates the weighing pan 3. For this reason, various configurations have been proposed to prevent this upward flow, but the fundamental problem is that the mechanism of the device is complicated, and relatively simple configurations have little effect. No solution has been made.
本発明は上述の点に鑑み構成したものであって、空気流
の影響を完全に防止するためには、空気流自体の発生を
押されることであるとの認識に基づくものであって、対
流現象の原因となっている発熱部の熱を装置外部に排出
することにより装置内の温度分布を均一化させるよう、
発熱部に対してヒートパイプを用いた除熱装置を設置し
たことを特徴する秤量装置である。The present invention was constructed in view of the above points, and is based on the recognition that in order to completely prevent the influence of airflow, it is necessary to suppress the generation of airflow itself. In order to equalize the temperature distribution inside the device by discharging the heat from the heat generating part that causes the phenomenon to the outside of the device,
This weighing device is characterized in that a heat removal device using a heat pipe is installed in the heat generating part.
電磁部や電子基板等発熱部を覆うようにヒートパイプ除
熱装置の蒸発部を配置し、発生した熱を作動媒体が気化
することより奪い、装置外部に配置した凝縮部（放熱部
）でその媒体蒸気の潜熱を放出する。The evaporation part of the heat pipe heat removal device is placed to cover the heat generating parts such as electromagnetic parts and electronic boards, and the generated heat is removed by vaporization of the working medium, and the condensation part (heat radiation part) placed outside the device removes the generated heat. Releases the latent heat of the medium vapor.
これにより電子天秤内部の温度分布を均一化させ、対流
発生の原因を取り除く。This makes the temperature distribution inside the electronic balance uniform and eliminates the cause of convection.
以下本発明の実施例を図面を参考に具体的に説明する。 Embodiments of the present invention will be specifically described below with reference to the drawings.
第１図において、２０は機構室１７内の電磁部１４に対
して装着した除熱装置であり、第２図を用いてこの除熱
装置の詳細を説明する。In FIG. 1, 20 is a heat removal device attached to the electromagnetic part 14 in the mechanism chamber 17, and the details of this heat removal device will be explained using FIG.
先ず、この除熱装置を取り付ける対象である電磁部１４
は次のような構成となっている。２１はボビンであり、
荷重伝達機構のアーム４に取り付けてあり、アームと共
に変位するようになっている。２２はこのボビン２１に
形成した電磁力発生用コイル、２３は磁石であり、これ
らボビン２１、コイル２２及び磁石２３を収納するよう
に円筒状のヨーク２４が配置しである。２５はこのヨー
ク２４の外周壁を覆うよう密着配置した蒸発部である。First, the electromagnetic part 14 to which this heat removal device is attached
has the following structure. 21 is a bobbin;
It is attached to the arm 4 of the load transmission mechanism, and is configured to be displaced together with the arm. 22 is an electromagnetic force generating coil formed on the bobbin 21, 23 is a magnet, and a cylindrical yoke 24 is arranged to accommodate the bobbin 21, coil 22, and magnet 23. Reference numeral 25 denotes an evaporation section disposed in close contact with the outer circumferential wall of the yoke 24.
蒸発部２５は内径がヨーク外径とほぼ等しく形成した円
筒状の中空部材であり、ヨーク２４を覆うように嵌通配
置しである。両者は蒸発部内周壁とヨーク外周壁とが密
着し、かつ蒸発部頂部中央に形成した挿通穴２５ａを通
過してボビン２１がアーム４と接続するようになってい
る。蒸発部２５は中空に構成してあり、内部には伝熱媒
体が封入しである。また伝熱媒体としては例えばフロン
等がよい。２６は蒸発部２５の上部に接続したパイプ部
であり、このバイブ部２６の他端は電子天秤本体１の壁
面を挿通して外部に突出して放熱部２６ａとなっている
。２７はこの放熱部２６ａに設けた放熱フィンである。The evaporator 25 is a cylindrical hollow member whose inner diameter is approximately equal to the outer diameter of the yoke, and is fitted over the yoke 24 . The inner circumferential wall of the evaporator section and the outer circumferential wall of the yoke are in close contact with each other, and the bobbin 21 is connected to the arm 4 through an insertion hole 25a formed at the center of the top of the evaporator section. The evaporation section 25 is configured to be hollow, and a heat transfer medium is sealed inside. Further, as the heat transfer medium, for example, fluorocarbon or the like is preferable. Reference numeral 26 denotes a pipe section connected to the upper part of the evaporation section 25, and the other end of the vibrator section 26 passes through the wall surface of the electronic balance main body 1 and projects to the outside to serve as a heat radiation section 26a. Reference numeral 27 denotes a heat radiation fin provided in this heat radiation part 26a.
以上の構成において、電磁部から発生した熱は蒸発部２
５に伝達され、内部の作動媒体を蒸発させる。In the above configuration, the heat generated from the electromagnetic section is transferred to the evaporation section 2.
5 and evaporates the working medium inside.
発生した熱はこの作動媒体の気化熱として奪われ、媒体
蒸気■は蒸発部２５内を上昇してパイプ部２６を経てそ
の端部の放熱部２６ａに至る。ここにおいて媒体蒸気は
凝縮して潜熱を放出して液化し、液化媒体りは毛管現象
及び重力によりパイプ部２６を経て蒸発部２５に戻って
行く、このように内部の作動媒体が蒸発・凝縮を繰り返
して循環流動することにより発熱部の熱を電子天秤外部
の放出する。なお、図示の構成では放熱部２６ａき放熱
は自然放熱であるが、この放熱部近傍にファンを配置し
て強制放熱させるように構成することももとより可能で
ある。The generated heat is taken away as heat of vaporization of the working medium, and the medium vapor (2) rises within the evaporator section 25, passes through the pipe section 26, and reaches the heat radiation section 26a at the end thereof. Here, the medium vapor condenses and releases latent heat to liquefy, and the liquefied medium returns to the evaporation section 25 via the pipe section 26 due to capillary action and gravity.In this way, the working medium inside is evaporated and condensed. By repeatedly circulating the flow, the heat in the heat generating part is released to the outside of the electronic balance. In the illustrated configuration, heat is radiated naturally through the heat radiating portion 26a, but it is of course possible to arrange a fan near the heat radiating portion to perform forced heat radiation.
第３図は別の構成を示す。FIG. 3 shows an alternative configuration.
この構成は別の発熱部である電子基板の放熱を目的とし
たものである。This configuration is aimed at dissipating heat from the electronic board, which is another heat generating section.
第３図（Ａ）において３０は電子基板であり、基板３０
に取り付けた各種電子（電気）部品３１から相当量の発
熱がある。３２はこの基板３０を覆うように配置した蒸
発部であり、基板の形状に対応してパネル状に形成しで
ある。パイプ部２６はこの蒸発部３２の上部に接続して
おり、蒸発部３２で発生した作動媒体蒸気■はこのパイ
プ部２６を経て放熱部に至る。なお図示の構成では基板
が鉛直方向に配置しである場合を例にパイプ部の接続状
態を示したが、基板３０が水平に位置しである場合には
同図（Ｂ）の如く、蒸発部３２の天井面に当たる部分に
漏斗状の蒸気集中部３３を形成してこの部分にパイプ部
２６を接続することにより媒体の循環を円滑に行うよう
に構成しておくとよい。In FIG. 3(A), 30 is an electronic board, and the board 30
A considerable amount of heat is generated from various electronic (electrical) components 31 attached to the. Reference numeral 32 denotes an evaporation section arranged to cover this substrate 30, and is formed into a panel shape corresponding to the shape of the substrate. The pipe section 26 is connected to the upper part of this evaporation section 32, and the working medium vapor (2) generated in the evaporation section 32 passes through this pipe section 26 and reaches the heat radiation section. In the illustrated configuration, the connection state of the pipe section is shown by taking as an example the case where the substrate is arranged in the vertical direction, but when the substrate 30 is arranged horizontally, the evaporation section is connected as shown in FIG. It is preferable to form a funnel-shaped steam concentration part 33 in the part corresponding to the ceiling surface of the pipe 32 and connect the pipe part 26 to this part so as to smoothly circulate the medium.
本発明は以上に具体的に説明したように、ヒートバイブ
式の除熱装置により熱発生部である電磁部及び電子基板
からの熱を有効に電子天秤外部に排出することが可能と
なる。この結果電子天秤内部における温度分布が均一と
なって対流現象が生じなくなり、極めて微量の重量測定
も、気流の影響無く可能となる。As specifically explained above, the present invention makes it possible to effectively discharge heat from the electromagnetic part and the electronic board, which are heat generating parts, to the outside of the electronic balance by using a heat vibrator type heat removal device. As a result, the temperature distribution inside the electronic balance becomes uniform, no convection phenomenon occurs, and extremely small amounts of weight can be measured without being affected by air currents.
第１図は本発明の実施例を示す電子天秤の機構図、第２
図は除熱装置を装着した電磁部の拡大図、第３図（Ａ）
は鉛直方向に配置した電子基板の除熱機構を示す図、同
（Ｂ）は水平に配置した電子基板の除熱状態を示す図で
ある。
１・・・電子天秤 ４・・・アーム
２０・・・除熱装置 ２１・・・ボビン２２・・・コ
イル ２３・・・磁石Fig. 1 is a mechanical diagram of an electronic balance showing an embodiment of the present invention;
The figure is an enlarged view of the electromagnetic part equipped with a heat removal device, Figure 3 (A)
FIG. 3B is a diagram showing a heat removal mechanism for an electronic board arranged vertically, and FIG. 2B is a diagram showing a heat removal state of an electronic board arranged horizontally. 1...Electronic balance 4...Arm 20...Heat removal device 21...Bobbin 22...Coil 23...Magnet
Claims (3)
よりその荷重を測定するものにおいて、電磁部及び電子
基板等の発熱部のうち少なくとも一部の発熱部に対し、
内部に作動媒体を封入した蒸発部を配置し、電子天秤外
部に配置した放熱部とこの蒸発部とを気密に接続して作
動媒体が蒸発部と放熱部との間を循環流動可能に構成し
、この作動媒体の循環流動により発熱部の熱を電子天秤
外部に放出するようにしたことを特徴とする除熱装置を
有する電子天秤。(1) In devices that measure the load of a weighed object by balancing it with electromagnetic force, for at least some of the heat generating parts such as the electromagnetic part and the electronic board,
An evaporation section with a working medium sealed inside is arranged, and the evaporation section is airtightly connected to a heat radiating section arranged outside the electronic balance, so that the working medium can circulate and flow between the evaporation section and the heat radiating section. An electronic balance having a heat removal device characterized in that the heat of the heat generating part is released to the outside of the electronic balance by the circulating flow of the working medium.
して円筒状の中空蒸発部を密着配置したことを特徴とす
る特許請求の範囲第（１）項記載の除熱装置を有する電
子天秤。(2) The heat removal device according to claim (1), wherein the heat removal target is an electromagnetic part, and a cylindrical hollow evaporator part is arranged in close contact with a yoke of the electromagnetic part. electronic balance.
うようにパネル状の蒸発部を近接配置したことを特徴と
する特許請求の範囲第（１）項記載の除熱装置を有する
電子天秤。（４）蒸発部と放熱部との間を循環流動する
作動媒体をフロンとしたことを特徴とする特許請求の範
囲第（１）項ないし第（３）項の何れかに記載の除熱装
置を有する電子天秤。(3) An electronic device having a heat removal device according to claim (1), characterized in that the heat removal target is an electronic board, and a panel-shaped evaporator is arranged close to the electronic board so as to cover the electronic board. Balance. (4) The heat removal device according to any one of claims (1) to (3), characterized in that the working medium that circulates and flows between the evaporation section and the heat radiation section is fluorocarbon. An electronic balance with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17276288A JPH0224518A (en) | 1988-07-13 | 1988-07-13 | Electronic balance having heat removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17276288A JPH0224518A (en) | 1988-07-13 | 1988-07-13 | Electronic balance having heat removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0224518A true JPH0224518A (en) | 1990-01-26 |
Family
ID=15947865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17276288A Pending JPH0224518A (en) | 1988-07-13 | 1988-07-13 | Electronic balance having heat removing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224518A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006071587A (en) * | 2004-09-06 | 2006-03-16 | Ishida Co Ltd | Metering apparatus |
| EP1925922A1 (en) | 2006-11-24 | 2008-05-28 | Mettler-Toledo AG | Temperature controlled multiple weighing device |
| DE202006020921U1 (en) | 2006-11-24 | 2011-06-09 | Mettler-Toledo Ag | Temperable multi-weighing device |
| JP2014102242A (en) * | 2012-10-24 | 2014-06-05 | Yamato Scale Co Ltd | Weight sorter |
| CN110462351A (en) * | 2017-05-19 | 2019-11-15 | 赛多利斯实验室仪器有限责任两合公司 | The magnetic tank of moving coil device for electronic balance |
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| JPS5837519B2 (en) * | 1975-11-10 | 1983-08-16 | 株式会社東芝 | The best way to do this is to |
| JPS616733B2 (en) * | 1978-03-04 | 1986-02-28 | Ntn Toyo Bearing Co Ltd | |
| JPS6355422A (en) * | 1986-05-15 | 1988-03-09 | Ee & D:Kk | Electromagnetic parallel type weighing device |
-
1988
- 1988-07-13 JP JP17276288A patent/JPH0224518A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837519B2 (en) * | 1975-11-10 | 1983-08-16 | 株式会社東芝 | The best way to do this is to |
| JPS616733B2 (en) * | 1978-03-04 | 1986-02-28 | Ntn Toyo Bearing Co Ltd | |
| JPS6355422A (en) * | 1986-05-15 | 1988-03-09 | Ee & D:Kk | Electromagnetic parallel type weighing device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006071587A (en) * | 2004-09-06 | 2006-03-16 | Ishida Co Ltd | Metering apparatus |
| EP1925922A1 (en) | 2006-11-24 | 2008-05-28 | Mettler-Toledo AG | Temperature controlled multiple weighing device |
| US7686507B2 (en) | 2006-11-24 | 2010-03-30 | Mettler-Toledo Ag | Multi-module weighing system with temperature control |
| DE202006020921U1 (en) | 2006-11-24 | 2011-06-09 | Mettler-Toledo Ag | Temperable multi-weighing device |
| JP2014102242A (en) * | 2012-10-24 | 2014-06-05 | Yamato Scale Co Ltd | Weight sorter |
| CN110462351A (en) * | 2017-05-19 | 2019-11-15 | 赛多利斯实验室仪器有限责任两合公司 | The magnetic tank of moving coil device for electronic balance |
| CN110462351B (en) * | 2017-05-19 | 2021-06-08 | 赛多利斯实验室仪器有限责任两合公司 | Magnetic pot for moving coil device of electronic balance |
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