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WO2012053093A1 - Heating and drying moisture meter - Google Patents

Heating and drying moisture meter Download PDF

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Publication number
WO2012053093A1
WO2012053093A1 PCT/JP2010/068662 JP2010068662W WO2012053093A1 WO 2012053093 A1 WO2012053093 A1 WO 2012053093A1 JP 2010068662 W JP2010068662 W JP 2010068662W WO 2012053093 A1 WO2012053093 A1 WO 2012053093A1
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heating furnace
heating
moisture meter
drying
heat
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楠本　哲朗
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Shimadzu Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
    • G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
    • G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content

Definitions

  • the present invention relates to a heat-drying type moisture meter for measuring a moisture content and a volatile content rate of a sample, or a weight loss due to drying.
  • Moisture meters are used in a wide range of industries, such as industry, chemistry, medicine, and food. Samples to be measured are various, such as solids, liquids, gases, and granular materials.
  • the method of measuring the amount of moisture is also the method of measuring the amount of light absorbed by the sample, the method of measuring the electrical resistance and capacitance of the sample, placing the sample in a vacuum atmosphere, drying it, and drying
  • the heat-drying moisture meter which evaporates the moisture in the sample by heating and measures the mass change of the sample before and after heating, can handle many types of samples and is relatively inexpensive to manufacture. There is a feature such as.
  • the heat drying type moisture meter is roughly divided into two parts, a heating part and a mass measuring part, as seen in Patent Document 1.
  • the heating unit includes a heating unit for heating and drying the sample, and a heating furnace provided with the heating unit, and the mass measurement unit mounts the sample provided in the heating furnace. And a mass measuring means for measuring the mass of the sample on the weighing pan provided outside the heating furnace.
  • JP 2003-302324 A Japanese Patent Laid-Open No. 2002-5805
  • a cooling duct is provided between the heating furnace and the mass measuring means, and heat drying is performed. Insulation is performed between the heating furnace and the mass measuring means by sending air to the cooling duct during measurement (see Patent Document 2).
  • the cooling in the heating furnace after the heating and drying measurement is conventionally performed by natural cooling by opening the lid.
  • the measurement of the next sample is continuously performed after the measurement of a certain sample is completed, it is necessary to wait for cooling in the heating furnace in order to suppress the measurement error. There was a problem.
  • the problem to be solved by the present invention is to provide a heat-drying moisture meter that can shorten the time required for continuous measurement.
  • the heat-drying moisture meter according to the present invention made to solve the above problems is A heating furnace for heating and drying the sample placed inside, a mass measuring means for measuring the mass of the sample provided outside the heating furnace, and between the heating furnace and the mass measuring means In a heat-drying moisture meter having a cooling duct provided in the air-cooling unit, and a blowing means for sending air to the cooling duct, It is characterized by having a ventilation switching means for switching at least a part of the ventilation to the cooling duct to the inside of the heating furnace after the measurement of the heating and drying of the sample is completed.
  • the air blowing switching means may be switched in conjunction with opening and closing of the heating furnace, or may be switched automatically after the heat drying measurement is completed.
  • the inside of the heating furnace is cooled without newly providing cooling parts by switching the air blow by the air blowing means between the heat drying measurement and after the heat drying measurement. This makes it possible to reduce the time required for continuous measurement while suppressing the manufacturing cost of the apparatus.
  • FIG. 1 shows a schematic longitudinal sectional view of one embodiment of a heat-drying moisture meter (hereinafter abbreviated as “moisture meter”) according to the present invention.
  • This moisture meter has a heating furnace 1 that contains a sample as a heating unit, and a heater (heating means) 2 that heats and drys the sample contained in the heating furnace 1, and a sample as a mass measuring unit.
  • a weighing pan 3 to be placed and a mass sensor (mass measuring means) 4 to measure the mass of the sample placed on the weighing pan 3 are provided.
  • the weighing pan 3 is provided inside the heating furnace 1, and is connected to the mass sensor 4 provided outside the heating furnace 1 via a connection portion 31.
  • a cooling duct 5 is provided between the heating furnace 1 and the mass sensor 4, and heat from the heating furnace 1 to the mass sensor 4 is transferred by taking outside air through a cooling fan (blower unit) 6 during the heating and drying measurement. Propagation is prevented.
  • the moisture meter of the present embodiment further opens and closes the heating furnace side duct 11 provided on the cooling fan side wall surface of the heating furnace 1 and the lid 7 of the heating furnace 1.
  • a shutter (air blowing switching means) 12 that closes only one of the cooling duct 5 and the heating furnace side duct 11.
  • the shutter 12 closes the heating furnace duct 11 when the lid 7 is closed (FIG. 1 (a)), and closes the cooling duct 5 when the lid 7 is open (FIG. 1 (b)).
  • the two ducts are switched in conjunction with opening and closing of the lid 7 by a mechanical mechanism (not shown).
  • the cooling fan is usually set to automatically stop after the measurement is completed, but the moisture meter according to the present invention needs to continue to operate for a while after the measurement is completed. For this reason, it is desirable to set the operation of the cooling fan 6 so that the temperature sensor 8 provided in the heating furnace falls below a certain threshold value or automatically stops after a predetermined time has elapsed.
  • the air is blown only to the heating furnace side duct 11 after the heat drying measurement is completed, but at this time, the air may also be blown to the cooling duct 5 side.
  • the shutter 12 switches between the two ducts in conjunction with the opening and closing of the lid 7.
  • the cooling is automatically performed by a motor or the like in synchronization with the end of the heat drying measurement. You may make it switch ventilation from the duct 5 to the heating furnace side duct 11. FIG.
  • a heating unit 21 having a heating furnace 1, a heater 2, a temperature sensor 8, a weighing pan 3, a connection unit 31, a mass measuring unit 22 having a mass sensor 4, and a cooling fan 6, a blower switching unit 24 having a motor and a shutter 12 (not shown), and a control unit 25 for controlling these units.
  • the control unit 25 controls the heating unit 21, the mass measurement unit 22, and the air blowing unit 23 as usual during the measurement of heat drying to measure the moisture content and the like.
  • the control unit 25 sends a signal to the air blowing switching unit 24, moves the shutter 12 by a motor (not shown), and switches air blowing from the cooling duct 5 to the heating furnace side duct 11. Thereby, even if the lid 7 is closed, the inside of the heating furnace 1 is forcibly cooled.
  • control unit 25 when the control unit 25 receives a signal from the temperature sensor 8 in the heating furnace 1 at regular time intervals and detects that the temperature is below the threshold value in the heating furnace 1, the control unit 25 reverses the motor of the air blowing switching unit 24 this time. It moves and the heating furnace side duct 11 is closed with the shutter 12. And the operation
  • the air blowing switching unit 24 performs the above operation after the heat drying measurement is completed, so that even if the analyst is away from the apparatus during the heat drying measurement, the inside of the heating furnace 1 is automatically cooled. can do.

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Abstract

A heating and drying moisture meter that can shorten the time required for continuous measuring is provided. The heating and drying moisture meter has: a heating furnace-side duct (11) disposed in a wall surface on a cooling fan (6) side in a heating furnace (1); and a shutter (12) that closes only one of either a cooling duct (5) or the heating furnace-side duct (11) in conjunction with the opening and closing of a lid (7) in the heating furnace (1). The shutter (12) switches between these two ducts in conjunction with the opening and closing of the lid (7), such that the heating furnace-side duct (11) is closed (Fig. 1(a)) when the lid (7) is closed and the cooling duct (5) is closed (Fig. 1(b)) when the lid (7) is open.

Description

加熱乾燥式水分計Heat drying moisture meter

　本発明は、試料の水分率や揮発分率、あるいは乾燥に伴う重量減少量を測定するための加熱乾燥式水分計に関する。 The present invention relates to a heat-drying type moisture meter for measuring a moisture content and a volatile content rate of a sample, or a weight loss due to drying.

　水分計は工業、化学、薬品、食品など幅広い分野で用いられ、測定対象とする試料も固体、液体、気体、粉粒体など様々である。水分量を測定する方法も、試料に照射した光の吸収量を測定する方法や、試料の電気抵抗や静電容量を測定する方法、真空雰囲気に試料を載置し、乾燥させてから乾燥させる前後の質量を測定する方法など数多く存在する。これらの中でも、加熱により試料中の水分を蒸発させ、加熱前後の試料の質量変化を測定する加熱乾燥式の水分計は、多くの種類の試料に対応することができ、製造コストも比較的安価にすむ、といった特長がある。 Moisture meters are used in a wide range of industries, such as industry, chemistry, medicine, and food. Samples to be measured are various, such as solids, liquids, gases, and granular materials. The method of measuring the amount of moisture is also the method of measuring the amount of light absorbed by the sample, the method of measuring the electrical resistance and capacitance of the sample, placing the sample in a vacuum atmosphere, drying it, and drying There are many methods for measuring the mass before and after. Among these, the heat-drying moisture meter, which evaporates the moisture in the sample by heating and measures the mass change of the sample before and after heating, can handle many types of samples and is relatively inexpensive to manufacture. There is a feature such as.

　加熱乾燥式水分計は、特許文献１に見られるように、加熱部と質量測定部の２つに大別される。ここで加熱部は、試料を加熱乾燥させるための加熱手段と、加熱手段を内部に備える加熱炉と、を有しており、質量測定部は、加熱炉内に設けられた、試料を載置するための秤量皿と、加熱炉の外部に設けられた、秤量皿上の試料の質量を測定するための質量測定手段と、を有している。 The heat drying type moisture meter is roughly divided into two parts, a heating part and a mass measuring part, as seen in Patent Document 1. Here, the heating unit includes a heating unit for heating and drying the sample, and a heating furnace provided with the heating unit, and the mass measurement unit mounts the sample provided in the heating furnace. And a mass measuring means for measuring the mass of the sample on the weighing pan provided outside the heating furnace.

特開２００３－３０２３２４号公報JP 2003-302324 A 特開２００２－５８０５号公報Japanese Patent Laid-Open No. 2002-5805

　加熱乾燥式水分計では、通常、質量測定手段が加熱炉内の温度上昇の影響を受け、測定誤差が生じることを防ぐために、加熱炉と質量測定手段との間に冷却ダクトを設け、加熱乾燥測定中にこの冷却ダクトに風を送ることによって、加熱炉と質量測定手段の間の断熱を行っている（特許文献２を参照）。 In a heat-drying type moisture meter, normally, in order to prevent the mass measuring means from being affected by the temperature rise in the heating furnace and causing measurement errors, a cooling duct is provided between the heating furnace and the mass measuring means, and heat drying is performed. Insulation is performed between the heating furnace and the mass measuring means by sending air to the cooling duct during measurement (see Patent Document 2).

　一方、加熱乾燥測定後の加熱炉内の冷却は、従来より、蓋を開いての自然放冷により行われている。しかしながら、或る試料の測定が終了した後、次の試料の測定を連続して行う場合、測定誤差を抑えるためには加熱炉内の冷却を待つ必要があり、そのため、連続測定に時間が掛かるという問題があった。 On the other hand, the cooling in the heating furnace after the heating and drying measurement is conventionally performed by natural cooling by opening the lid. However, when the measurement of the next sample is continuously performed after the measurement of a certain sample is completed, it is necessary to wait for cooling in the heating furnace in order to suppress the measurement error. There was a problem.

　本発明が解決しようとする課題は、連続測定に要する時間を短縮することができる加熱乾燥式水分計を提供することである。 The problem to be solved by the present invention is to provide a heat-drying moisture meter that can shorten the time required for continuous measurement.

　上記課題を解決するために成された本発明に係る加熱乾燥式水分計は、
　内部に載置された試料の加熱乾燥を行うための加熱炉と、前記加熱炉の外部に設けられた、前記試料の質量を測定する質量測定手段と、前記加熱炉と前記質量測定手段の間に設けられた冷却ダクトと、前記冷却ダクトに風を送るための送風手段と、を有する加熱乾燥式水分計において、
　前記試料の加熱乾燥測定が終了した後に、前記冷却ダクトへの送風の少なくとも一部を前記加熱炉の内部へと切り替える送風切り替え手段
　を有していることを特徴とする。 The heat-drying moisture meter according to the present invention made to solve the above problems is
A heating furnace for heating and drying the sample placed inside, a mass measuring means for measuring the mass of the sample provided outside the heating furnace, and between the heating furnace and the mass measuring means In a heat-drying moisture meter having a cooling duct provided in the air-cooling unit, and a blowing means for sending air to the cooling duct,
It is characterized by having a ventilation switching means for switching at least a part of the ventilation to the cooling duct to the inside of the heating furnace after the measurement of the heating and drying of the sample is completed.

　なお、前記送風切り替え手段は、加熱炉の開閉に連動して切り替わるようにしても良いし、加熱乾燥測定が終了した後に自動で切り替わるようにしても良い。 The air blowing switching means may be switched in conjunction with opening and closing of the heating furnace, or may be switched automatically after the heat drying measurement is completed.

　本発明に係る加熱乾燥式水分計では、送風手段による送風を加熱乾燥測定中と加熱乾燥測定後とで切り替えることにより、新たに冷却用の部品を設けることなく加熱炉内の冷却を行う。これにより、装置の製造コストを抑えながら、連続測定に要する時間を短縮することが可能となる。 In the heat drying type moisture meter according to the present invention, the inside of the heating furnace is cooled without newly providing cooling parts by switching the air blow by the air blowing means between the heat drying measurement and after the heat drying measurement. This makes it possible to reduce the time required for continuous measurement while suppressing the manufacturing cost of the apparatus.

本発明に係る加熱乾燥式水分計の一実施例を示す概略断面図。The schematic sectional drawing which shows one Example of the heat drying type moisture meter which concerns on this invention. 本実施例の加熱乾燥式水分計の変形例を示すブロック図。The block diagram which shows the modification of the heat drying type moisture meter of a present Example.

　図１に、本発明に係る加熱乾燥式水分計（以下、「水分計」と略す）の一実施例の概略縦断面図を示す。この水分計は、加熱部として、試料を収容する加熱炉１と、加熱炉１内に収容された試料を加熱乾燥させるヒータ（加熱手段）２と、を有し、質量測定部として、試料を載置する秤量皿３と、秤量皿３上に載置された試料の質量を測定する質量センサ（質量測定手段）４と、を有する。ここで、秤量皿３は加熱炉１の内部に設けられており、加熱炉１の外部に設けられた質量センサ４と接続部３１を介して接続されている。また、加熱炉１と質量センサ４の間には冷却ダクト５が設けられ、加熱乾燥測定中に冷却ファン（送風手段）６を通して外気を取り入れることにより、加熱炉１から質量センサ４への熱の伝播を防いでいる。 FIG. 1 shows a schematic longitudinal sectional view of one embodiment of a heat-drying moisture meter (hereinafter abbreviated as “moisture meter”) according to the present invention. This moisture meter has a heating furnace 1 that contains a sample as a heating unit, and a heater (heating means) 2 that heats and drys the sample contained in the heating furnace 1, and a sample as a mass measuring unit. A weighing pan 3 to be placed and a mass sensor (mass measuring means) 4 to measure the mass of the sample placed on the weighing pan 3 are provided. Here, the weighing pan 3 is provided inside the heating furnace 1, and is connected to the mass sensor 4 provided outside the heating furnace 1 via a connection portion 31. In addition, a cooling duct 5 is provided between the heating furnace 1 and the mass sensor 4, and heat from the heating furnace 1 to the mass sensor 4 is transferred by taking outside air through a cooling fan (blower unit) 6 during the heating and drying measurement. Propagation is prevented.

　以上は、従来の水分計と同じ構造であるが、本実施例の水分計では更に、加熱炉１の冷却ファン側壁面に設けられた加熱炉側ダクト１１と、加熱炉１の蓋７の開閉に連動して、冷却ダクト５と加熱炉側ダクト１１のどちらか一方のみを閉ざすシャッター（送風切り替え手段）１２と、を有している。このシャッター１２は、蓋７が閉じられている状態では加熱炉側ダクト１１を閉ざし（図１(a)）、蓋７が開いている状態では冷却ダクト５を閉ざすよう（図１(b)）、図示しない機械的な機構により蓋７の開閉に連動してこれら２つのダクトの切り替えを行うというものである。 The above is the same structure as the conventional moisture meter, but the moisture meter of the present embodiment further opens and closes the heating furnace side duct 11 provided on the cooling fan side wall surface of the heating furnace 1 and the lid 7 of the heating furnace 1. In conjunction with this, there is provided a shutter (air blowing switching means) 12 that closes only one of the cooling duct 5 and the heating furnace side duct 11. The shutter 12 closes the heating furnace duct 11 when the lid 7 is closed (FIG. 1 (a)), and closes the cooling duct 5 when the lid 7 is open (FIG. 1 (b)). The two ducts are switched in conjunction with opening and closing of the lid 7 by a mechanical mechanism (not shown).

　このような構造を用いることにより、加熱乾燥測定が終了した後に蓋７を開けると、冷却ファン６から送られてくる風によって加熱炉１内が強制的に冷却され、自然放冷よりも早く加熱炉１の内部及び各部位が冷却される。そのため、次の試料を測定するまでに要する時間を短縮することが可能となる。 By using such a structure, when the lid 7 is opened after the heat drying measurement is completed, the inside of the heating furnace 1 is forcibly cooled by the wind sent from the cooling fan 6 and heated faster than natural cooling. The inside of furnace 1 and each part are cooled. Therefore, it is possible to shorten the time required to measure the next sample.

　なお、冷却ファンは通常、測定終了後に自動で停止するように設定されているが、本発明に係る水分計では測定終了後もしばらくの間は動作し続ける必要がある。そのため、加熱炉内に設けられた温度センサ８が一定の閾値以下になるか所定の時間が経過した後に自動で停止するように、冷却ファン６の動作を設定することが望ましい。 The cooling fan is usually set to automatically stop after the measurement is completed, but the moisture meter according to the present invention needs to continue to operate for a while after the measurement is completed. For this reason, it is desirable to set the operation of the cooling fan 6 so that the temperature sensor 8 provided in the heating furnace falls below a certain threshold value or automatically stops after a predetermined time has elapsed.

　また、本実施例では、加熱乾燥測定が終了した後では加熱炉側ダクト１１にのみ送風を行うようにしていたが、この際に冷却ダクト５側にも送風されるようにしても良い。 Further, in the present embodiment, the air is blown only to the heating furnace side duct 11 after the heat drying measurement is completed, but at this time, the air may also be blown to the cooling duct 5 side.

　以上、本発明に係る加熱乾燥式水分計について実施例を用いて説明したが、本発明の趣旨の範囲内で適宜に変更や修正、又は追加を行っても構わない。 As described above, the heat-drying moisture meter according to the present invention has been described with reference to the embodiments. However, changes, modifications, or additions may be appropriately made within the scope of the gist of the present invention.

　例えば、上記実施例では、シャッター１２が蓋７の開閉と連動して２つのダクトの切り替えを行うようにしていたが、例えば、加熱乾燥測定の終了とタイミングを合わせて、モータ等により自動で冷却ダクト５から加熱炉側ダクト１１へと送風を切り替えるようにしても良い。 For example, in the above embodiment, the shutter 12 switches between the two ducts in conjunction with the opening and closing of the lid 7. For example, the cooling is automatically performed by a motor or the like in synchronization with the end of the heat drying measurement. You may make it switch ventilation from the duct 5 to the heating furnace side duct 11. FIG.

　これを図１(a)の概略縦断面図を基に、図２の機能ブロック図を用いて説明する。図２に示す本変形例の水分計では、加熱炉１、ヒータ２、温度センサ８を有する加熱部２１と、秤量皿３、接続部３１、質量センサ４を有する質量測定部２２と、冷却ファン６を有する送風部２３と、図示しないモータ及びシャッター１２を有する送風切り替え部２４と、これら各部を制御する制御部２５と、を備えている。 This will be described with reference to the functional block diagram of FIG. 2 based on the schematic longitudinal sectional view of FIG. In the moisture meter of this modification shown in FIG. 2, a heating unit 21 having a heating furnace 1, a heater 2, a temperature sensor 8, a weighing pan 3, a connection unit 31, a mass measuring unit 22 having a mass sensor 4, and a cooling fan 6, a blower switching unit 24 having a motor and a shutter 12 (not shown), and a control unit 25 for controlling these units.

　制御部２５は、加熱乾燥測定中は通常通りに加熱部２１、質量測定部２２、送風部２３を制御して水分率等の測定を行う。一方、加熱乾燥測定が終了すると、制御部２５は送風切り替え部２４に信号を送り、図示しないモータによってシャッター１２を動かし、冷却ダクト５から加熱炉側ダクト１１へと送風を切り替える。これにより、蓋７が閉ざされた状態であっても、加熱炉１内が強制的に冷却される。 The control unit 25 controls the heating unit 21, the mass measurement unit 22, and the air blowing unit 23 as usual during the measurement of heat drying to measure the moisture content and the like. On the other hand, when the heat drying measurement is completed, the control unit 25 sends a signal to the air blowing switching unit 24, moves the shutter 12 by a motor (not shown), and switches air blowing from the cooling duct 5 to the heating furnace side duct 11. Thereby, even if the lid 7 is closed, the inside of the heating furnace 1 is forcibly cooled.

　制御部２５は更に、加熱炉１内の温度センサ８から一定の時間間隔で信号を受け取り、加熱炉１内の閾値以下になったことを検知すると、今度は送風切り替え部２４のモータを逆に動かして加熱炉側ダクト１１をシャッター１２で閉ざす。そして、送風部２３における冷却ファン６の動作を停止する。本変形例では、加熱乾燥測定が終了した後に送風切り替え部２４が上記の動作を行うことにより、分析者が例えば加熱乾燥測定中に装置から離れていたとしても、自動で加熱炉１内を冷却することができる。 Further, when the control unit 25 receives a signal from the temperature sensor 8 in the heating furnace 1 at regular time intervals and detects that the temperature is below the threshold value in the heating furnace 1, the control unit 25 reverses the motor of the air blowing switching unit 24 this time. It moves and the heating furnace side duct 11 is closed with the shutter 12. And the operation | movement of the cooling fan 6 in the ventilation part 23 is stopped. In this modified example, the air blowing switching unit 24 performs the above operation after the heat drying measurement is completed, so that even if the analyst is away from the apparatus during the heat drying measurement, the inside of the heating furnace 1 is automatically cooled. can do.

１…加熱炉
１１…加熱炉側ダクト
１２…シャッター
２…ヒータ
３…秤量皿
３１…接続部
４…質量センサ
５…冷却ダクト
６…冷却ファン
７…蓋
８…温度センサ
２１…加熱部
２２…質量測定部
２３…送風部
２４…送風切り替え部
２５…制御部 DESCRIPTION OF SYMBOLS 1 ... Heating furnace 11 ... Heating furnace side duct 12 ... Shutter 2 ... Heater 3 ... Weighing pan 31 ... Connection part 4 ... Mass sensor 5 ... Cooling duct 6 ... Cooling fan 7 ... Cover 8 ... Temperature sensor 21 ... Heating part 22 ... Mass Measuring unit 23 ... Blower unit 24 ... Blower switching unit 25 ... Control unit

Claims (3)

　内部に載置された試料の加熱乾燥を行うための加熱炉と、前記加熱炉の外部に設けられた、前記試料の質量を測定する質量測定手段と、前記加熱炉と前記質量測定手段の間に設けられた冷却ダクトと、前記冷却ダクトに風を送るための送風手段と、を有する加熱乾燥式水分計において、
　前記試料の加熱乾燥測定が終了した後に、前記冷却ダクトへの送風の少なくとも一部を前記加熱炉の内部へと切り替える送風切り替え手段
　を有していることを特徴とする加熱乾燥式水分計。 A heating furnace for heating and drying the sample placed inside, a mass measuring means for measuring the mass of the sample provided outside the heating furnace, and between the heating furnace and the mass measuring means In a heat-drying moisture meter having a cooling duct provided in the air-cooling unit, and a blowing means for sending air to the cooling duct,
A heat-drying type moisture meter, comprising: air blowing switching means for switching at least part of the air blowing to the cooling duct to the inside of the heating furnace after the measurement of the heat drying of the sample is completed. 　前記送風切り替え手段が、加熱炉の開閉に連動して送風を切り替えることを特徴とする請求項１に記載の加熱乾燥式水分計。 The heat drying moisture meter according to claim 1, wherein the air blowing switching means switches air blowing in conjunction with opening and closing of the heating furnace. 　前記送風切り替え手段が、加熱乾燥測定が終了した後に自動で送風を切り替えることを特徴とする請求項１に記載の加熱乾燥式水分計。 The heat drying moisture meter according to claim 1, wherein the air blowing switching unit automatically switches air blowing after the heat drying measurement is completed.
PCT/JP2010/068662 2010-10-22 2010-10-22 Heating and drying moisture meter Ceased WO2012053093A1 (en)

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JP2019039745A (en) * 2017-08-24 2019-03-14 株式会社島津製作所 Adsorption rate measuring device

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