JPH0663425A - Comparison temperature tank - Google Patents
Comparison temperature tankInfo
- Publication number
- JPH0663425A JPH0663425A JP23533292A JP23533292A JPH0663425A JP H0663425 A JPH0663425 A JP H0663425A JP 23533292 A JP23533292 A JP 23533292A JP 23533292 A JP23533292 A JP 23533292A JP H0663425 A JPH0663425 A JP H0663425A
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- liquid
- temperature
- temp
- cylinder
- 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
Landscapes
- Devices For Use In Laboratory Experiments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、測温抵抗体、熱電対
等の温度センサの比較校正等を行うための比較温槽に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a comparative temperature tank for performing comparative calibration of temperature sensors such as resistance temperature detectors and thermocouples.
【０００２】[0002]
【従来の技術】従来、被構成温度センサと標準温度セン
サとを同一温度条件で、比較校正するための恒温槽とし
て、水温槽、油温槽（オイルバス）等がある。これら
は、水、オイル等を断熱容器に収容してヒータ等で加熱
し、攪拌羽を回転、攪拌するようにしているものである
（社団法人計測自動制御学会昭和５６年３月１６日初版
発行「温度計測」第１６１頁−１６６頁）。2. Description of the Related Art Conventionally, there are a water temperature tank, an oil temperature tank (oil bath), etc. as a constant temperature tank for comparing and calibrating a constituent temperature sensor and a standard temperature sensor under the same temperature condition. These are those in which water, oil, etc. are housed in a heat-insulating container and heated by a heater etc., and the stirring blades are rotated and stirred (Issued by the Society of Instrument and Control Engineers, March 16, 1981, first edition). "Temperature measurement" pp. 161-166).
【０００３】[0003]
【発明が解決しようとする課題】このような油温槽等で
は、容器外部の駆動源から槽の外壁にシャフトを通して
攪拌羽を回転駆動等しなければならず、油もれ等のおそ
れもありシャフト軸のシール等も必要で信頼性の低下を
招き、全体として構造が複雑で大型化し、価格も高価と
なるものであった。In such an oil temperature tank, etc., a stirring blade has to be rotationally driven from a drive source outside the container through a shaft through the outer wall of the tank, which may cause oil leakage. A shaft shaft seal and the like are also required, leading to a decrease in reliability, and the overall structure is complicated and large, and the price is expensive.
【０００４】この発明の目的は、以上の点に鑑み、攪拌
羽等を無くし、小型、高精度、高信頼性の、検定、校正
等に好適な比較温槽を提供することである。SUMMARY OF THE INVENTION In view of the above points, an object of the present invention is to provide a comparative temperature tank which is free from agitating blades and the like and is small in size, high in accuracy and high in reliability and suitable for verification, calibration and the like.
【０００５】[0005]
【課題を解決するための手段】この発明は、底部に拡散
板を有し液体を収容する内筒と、この内筒より外径が大
きくしかも高い外筒と、内筒からあふれた液体を外筒の
底部から内筒の底部へ配管により送出する送出手段と、
前記配管を流れる液体の温度を一定に制御するための制
御手段とを備えるようにし、前記内筒の一定温度とされ
た液体に温度センサを挿入して比較校正を行うことを特
徴とする比較温槽である。SUMMARY OF THE INVENTION According to the present invention, an inner cylinder having a diffusion plate at the bottom for accommodating a liquid, an outer cylinder having an outer diameter larger and higher than the inner cylinder, and a liquid overflowing from the inner cylinder Delivery means for delivering from the bottom of the cylinder to the bottom of the inner cylinder by piping,
And a control unit for controlling the temperature of the liquid flowing through the pipe to be constant, and a comparative temperature is characterized by inserting a temperature sensor into the liquid of which the inner cylinder has a constant temperature to perform comparative calibration. It is a tank.
【０００６】[0006]
【実施例】図１は、この発明の一実施例を示す構成説明
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural explanatory view showing an embodiment of the present invention.
【０００７】図において、１は、水、油等の液体Ｗを収
容する内筒で、その底部にはステンレス、真ちゅう等の
多孔質焼結体又は金属板に多孔を形成した拡散板２が設
けられている。内筒１の外側には、内筒１を取り囲み内
筒１よりも外径が大きくしかも高さの高い外筒３が設け
られ、その上部に開口４０を有する蓋体４が設けられて
いる。内筒１の外側の外筒３との間の外筒３の底部に接
続する配管５１と、内筒１の底部に接続する配管５２と
の間にポンプ等の送出手段６が設けられ、内筒１の上部
からあふれた液体Ｗを外筒３の底部から内筒１の底部に
送っている。また、配管５１、５２の所要箇所にヒータ
等の熱交換器７が設けられ、温度検出器８０で熱交換器
７の配管を流れる液体Ｗの温度を検知し、熱交換器７を
制御手段８で制御し一定温度となるよう制御している。
なお、必要に応じ、配管の途中に冷凍機等の冷却手段９
を設け、液体Ｗを低温度としてもよい。そして、蓋体４
の開口４０から、標準用の温度センサ１１ａと比較校正
するための１本以上の被校正用の温度センサ１１ｂを内
筒１の一定温度とされた液体に挿入し、比較校正が行わ
れる。なお、使用する液体Ｗの量は、内筒１の容積と配
管５１、５２の部分の容積の和よりも若干多めにしたお
けば十分で、液体Ｗの熱膨張により外筒３内よりあふれ
ない量にしておく。In the figure, reference numeral 1 denotes an inner cylinder for containing a liquid W such as water or oil, the bottom of which is provided a porous sintered body such as stainless steel or brass, or a diffusion plate 2 formed by forming a porous metal plate. Has been. Outside the inner cylinder 1, an outer cylinder 3 that surrounds the inner cylinder 1 and has a larger outer diameter and a higher height than the inner cylinder 1 is provided, and a lid 4 having an opening 40 is provided above the outer cylinder 3. A delivery means 6 such as a pump is provided between a pipe 51 connected to the bottom of the outer cylinder 3 between the outer cylinder 3 outside the inner cylinder 1 and a pipe 52 connected to the bottom of the inner cylinder 1. The liquid W overflowing from the top of the cylinder 1 is sent from the bottom of the outer cylinder 3 to the bottom of the inner cylinder 1. Further, a heat exchanger 7 such as a heater is provided at a required position of the pipes 51 and 52, and the temperature detector 80 detects the temperature of the liquid W flowing through the pipe of the heat exchanger 7, and controls the heat exchanger 7 by a control means 8. The temperature is controlled to control the temperature to be constant.
If necessary, cooling means 9 such as a refrigerator may be provided in the middle of the piping.
May be provided, and the liquid W may have a low temperature. And the lid 4
From the opening 40, one or more temperature sensors 11b to be calibrated for comparative calibration with the standard temperature sensor 11a are inserted into the liquid of the inner cylinder 1 having a constant temperature, and comparative calibration is performed. It should be noted that the amount of the liquid W to be used may be slightly larger than the sum of the volume of the inner cylinder 1 and the volumes of the pipes 51 and 52, and the thermal expansion of the liquid W does not cause overflow of the outer cylinder 3. Keep the amount.
【０００８】つまり、内筒１をあふれた液体Ｗは、その
外壁を落下して外筒３の底部に達し、送出手段６により
配管５１、５２を通し内筒１の底部に到達する。このと
き配管５２に設けられ制御手段８により制御される熱交
換器７により所定温度の液体Ｗとなっている。この液体
Ｗは拡散板２を下方から上方に通過するが、拡散板２の
作用で、全面にわたって等圧な均一な流れとされ、内筒
１の内部を上昇し、きわめて温度均一性、温度安全性の
良好なものとなる。この内筒１の液体Ｗ中に、抵抗体等
の標準用の温度センサ１１ａ、被校正用の温度センサ１
１ａを上方より挿入し、両者の出力から比較校正を行
う。また、制御手段８による設定温度変更により各種温
度における校正が可能となる。In other words, the liquid W overflowing the inner cylinder 1 drops on the outer wall thereof to reach the bottom of the outer cylinder 3, and reaches the bottom of the inner cylinder 1 through the pipes 51 and 52 by the delivery means 6. At this time, the liquid W having a predetermined temperature is formed by the heat exchanger 7 provided in the pipe 52 and controlled by the control means 8. This liquid W passes through the diffusion plate 2 from the lower side to the upper side, but by the action of the diffusion plate 2, it is made a uniform flow of equal pressure over the entire surface and rises inside the inner cylinder 1, so that the temperature uniformity and temperature safety are extremely high. It has good properties. In the liquid W in the inner cylinder 1, a standard temperature sensor 11a such as a resistor and a temperature sensor 1 to be calibrated
1a is inserted from above, and comparison calibration is performed from the outputs of both. Further, by changing the set temperature by the control means 8, it becomes possible to calibrate at various temperatures.
【０００９】そして、冷却手段９を作動させることによ
り、より低温域の温度範囲の比較温槽が実現できる。た
とえば、液体Ｗとして、水を使用すれば、１５〜９０
℃、シリコンオイルを使用すれば、−５０〜３００℃の
各種温度の恒温液槽とすることができる。また、内筒１
外筒３との間の空気層で断熱作用をもたせ、より一層均
一な液温とすることができる。By operating the cooling means 9, it is possible to realize a comparative temperature tank in a lower temperature range. For example, if water is used as the liquid W, 15 to 90
By using silicon oil at ℃, it is possible to make a constant temperature liquid bath at various temperatures of -50 to 300 ℃. Also, the inner cylinder 1
An air layer between the outer cylinder 3 and the outer cylinder 3 has a heat insulating function, so that a more uniform liquid temperature can be obtained.
【００１０】[0010]
【発明の効果】以上述べたように、この発明は、内筒、
外筒を設け、内筒をあふれた液体を、内筒下部の拡散板
を介して循環させるようにした比較温槽である。従っ
て、攪拌羽が不要で液量も内筒分程度の従来の半分位で
済み、液体の熱膨脹も吸収でき、攪拌羽用のシャフト軸
のシールも不要であり、小型、安価なものとなる。ま
た、拡散板の作用で内筒内の液温は、均一温度とされ、
しかも、内筒と外筒との断熱空気層の作用で、いっそ
う、温度分布、温度安全性が向上する。また、制御手段
により、各種任意温度が実現でき、同時に多数の温度セ
ンサの比較校正、検定が可能である。As described above, according to the present invention, the inner cylinder,
It is a comparative temperature tank in which an outer cylinder is provided, and a liquid overflowing the inner cylinder is circulated through a diffusion plate below the inner cylinder. Therefore, a stirring blade is not required, and the amount of liquid is about half that of the conventional one, which is equivalent to that of the inner cylinder, thermal expansion of the liquid can be absorbed, and a shaft shaft for the stirring blade is not required to be sealed, and the device is small and inexpensive. Also, the liquid temperature in the inner cylinder is made uniform by the action of the diffusion plate,
Moreover, the temperature distribution and temperature safety are further improved by the action of the heat insulating air layer between the inner cylinder and the outer cylinder. Further, various arbitrary temperatures can be realized by the control means, and at the same time, comparative calibration and verification of a large number of temperature sensors are possible.
【図１】この発明の一実施例を示す構成説明図である。FIG. 1 is a structural explanatory view showing an embodiment of the present invention.
１ 内筒 ２ 拡散板 ３ 外筒 ４ 蓋体 ５１、５２ 配管 ６ 送出手段 ７ 熱交換器 ８ 制御手段 ９ 冷却手段 １０ａ、１０ｂ 温度センサ Ｗ 液体 1 Inner Cylinder 2 Diffusion Plate 3 Outer Cylinder 4 Lid 51, 52 Piping 6 Delivery Means 7 Heat Exchanger 8 Control Means 9 Cooling Means 10a, 10b Temperature Sensor W Liquid
Claims (1)
と、この内筒より外径が大きくしかも高い外筒と、内筒
からあふれた液体を外筒の底部から内筒の底部へ配管に
より送出する送出手段と、前記配管を流れる液体の温度
を一定に制御するための制御手段とを備え、前記内筒の
一定温度とされた液体に温度センサを挿入して比較校正
を行うことを特徴とする比較温槽。Claim: What is claimed is: 1. An inner cylinder having a diffusion plate at the bottom for containing a liquid, an outer cylinder having an outer diameter larger and higher than the inner cylinder, and a liquid overflowing from the inner cylinder from the bottom of the outer cylinder to the bottom of the inner cylinder. It is equipped with a delivery means for delivering to the pipe by means of a pipe and a control means for controlling the temperature of the liquid flowing through the pipe to be constant, and a temperature sensor is inserted into the liquid of which the inner cylinder has a constant temperature for comparative calibration. A comparative hot water tank characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23533292A JPH0663425A (en) | 1992-08-11 | 1992-08-11 | Comparison temperature tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23533292A JPH0663425A (en) | 1992-08-11 | 1992-08-11 | Comparison temperature tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0663425A true JPH0663425A (en) | 1994-03-08 |
Family
ID=16984540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23533292A Pending JPH0663425A (en) | 1992-08-11 | 1992-08-11 | Comparison temperature tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107731A (en) * | 2014-08-04 | 2014-10-22 | 广州赛宝计量检测中心服务有限公司 | Constant-temperature temperature test box heated by liquid |
-
1992
- 1992-08-11 JP JP23533292A patent/JPH0663425A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107731A (en) * | 2014-08-04 | 2014-10-22 | 广州赛宝计量检测中心服务有限公司 | Constant-temperature temperature test box heated by liquid |
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