JP2019211227A - Temperature measurement system, heating furnace, and workpiece temperature acquisition method in heating furnace - Google Patents

Temperature measurement system, heating furnace, and workpiece temperature acquisition method in heating furnace Download PDF

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JP2019211227A
JP2019211227A JP2018104708A JP2018104708A JP2019211227A JP 2019211227 A JP2019211227 A JP 2019211227A JP 2018104708 A JP2018104708 A JP 2018104708A JP 2018104708 A JP2018104708 A JP 2018104708A JP 2019211227 A JP2019211227 A JP 2019211227A
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temperature
heat exchanger
heating furnace
workpiece
furnace
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Inventor
正文 勝田
Masabumi Katsuta
正文 勝田
吉田　誠
Makoto Yoshida
吉田　　誠
早乙女　康典
Yasunori Saotome
康典 早乙女
神田　輝一
Terukazu Kanda
輝一 神田
寛之 臼井
Hiroyuki Usui
寛之 臼井
剛士 大澤
Takeshi Osawa
剛士 大澤
浩隆 門
Hirotaka Kado
浩隆 門
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Mitsui Photonics Ltd
Waseda University
Kanto Yakin Kogyo Co Ltd
Sanden Automotive Climate Systems Corp
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Mitsui Photonics Ltd
Waseda University
Kanto Yakin Kogyo Co Ltd
Sanden Automotive Climate Systems Corp
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Abstract

To provide a temperature measurement system capable of accurately acquiring a temperature of a workpiece heated in a heating furnace, the heating furnace, and a workpiece temperature acquisition method in the heating furnace.SOLUTION: A temperature measurement system comprises a non-contact thermometer 71 which detects a temperature of a heat exchanger W located in a furnace, and a shield wall 40c which shields an electromagnetic wave arriving at the heat exchanger W due to heat radiation when the thermometer 71 detects the temperature of the heat exchanger W in the furnace. The temperature of the heat exchanger W can be acquired in a state in which the influence of the electromagnetic wave radiated due to heat radiation from an electric heater 41 is reduced, so the heat exchanger W can be surely heated to a target temperature by controlling an output of the electric heater 41 on the basis of the acquired temperature of the heat exchanger W. This makes it possible to suppress junction failures between metal components of the heat exchanger W.SELECTED DRAWING: Figure 2

Description

本発明は、例えば、アルミニウム等からなる複数の金属部品を互いにろう付けで接合する際に用いられる温度計測システム、加熱炉及び加熱炉内におけるワーク温度取得方法に関するものである。   The present invention relates to a temperature measurement system, a heating furnace, and a work temperature acquisition method in a heating furnace used when, for example, a plurality of metal parts made of aluminum or the like are joined together by brazing.

従来、この種の加熱炉では、炉内を加熱するためのヒータと、炉内の温度を検出するための温度センサと、を備え、温度センサの検出温度に基づいてヒータの出力を制御することで、炉内の温度を設定温度とするものが知られている（例えば、特許文献１参照）。   Conventionally, this type of heating furnace includes a heater for heating the inside of the furnace and a temperature sensor for detecting the temperature in the furnace, and controls the output of the heater based on the temperature detected by the temperature sensor. Thus, there is known one in which the temperature in the furnace is set to the set temperature (see, for example, Patent Document 1).

特開平０４−３１３４６２号公報Japanese Unexamined Patent Publication No. 04-31462

前記加熱炉では、ヒータによって炉内に位置するワークを加熱する際に、炉内の温度を設定温度まで加熱したとしても、炉内に位置するワークの温度が目的の温度に加熱されているか否かを判定することができない。このため、前記加熱炉では、ワークの温度が目的の温度に加熱できていない可能性がある。ワークが目的の温度まで加熱されない場合には、ろう付けによって複数の金属部品を互いに接続する場合に、接合不良が生じ得る。   In the heating furnace, when the workpiece located in the furnace is heated by the heater, whether or not the temperature of the workpiece located in the furnace is heated to a target temperature even if the temperature in the furnace is heated to the set temperature. Cannot be determined. For this reason, in the said heating furnace, the temperature of a workpiece | work may not be heated to the target temperature. If the workpiece is not heated to the target temperature, poor bonding may occur when the metal parts are connected to each other by brazing.

本発明の目的とするところは、炉内において加熱されたワークの温度を正確に取得することのできる温度計測システム、加熱炉及び加熱炉内におけるワーク温度取得方法を提供することにある。   An object of the present invention is to provide a temperature measurement system, a heating furnace, and a workpiece temperature acquisition method in the heating furnace that can accurately acquire the temperature of the workpiece heated in the furnace.

本発明の温度計測システムは、前記目的を達成するために、ワークに到達する電磁波を吸収または遮蔽するように設けられる遮蔽壁と、該遮蔽壁によって少なくとも部分的に区画形成された領域におけるワークの温度を検出するように設けられる非接触式の温度計と、を備えている。   In order to achieve the above object, the temperature measurement system of the present invention includes a shielding wall provided to absorb or shield electromagnetic waves reaching the workpiece, and a workpiece in an area at least partially partitioned by the shielding wall. A non-contact thermometer provided to detect the temperature.

また、本発明の加熱炉内におけるワーク温度取得方法は、前記目的を達成するために、ヒータによって加熱されたワークの温度を取得する加熱炉内におけるワーク温度取得方法であって、熱放射によってワークに到達する電磁波を遮蔽壁によって吸収または遮蔽し、遮蔽壁によって電磁波の到達が吸収または遮蔽された状態のワークの温度を、非接触式の温度計によって計測する。   The workpiece temperature acquisition method in a heating furnace of the present invention is a workpiece temperature acquisition method in a heating furnace that acquires the temperature of a workpiece heated by a heater in order to achieve the above-described object. The electromagnetic wave that reaches is absorbed or shielded by the shielding wall, and the temperature of the workpiece in which the arrival of the electromagnetic wave is absorbed or shielded by the shielding wall is measured by a non-contact thermometer.

これにより、温度計によってワークの温度を取得する際に、ヒータからの熱放射によって放出された電磁波の影響を小さくした状態でワークの温度が取得される。   Thereby, when acquiring the temperature of a workpiece | work with a thermometer, the temperature of a workpiece | work is acquired in the state which made the influence of the electromagnetic waves emitted by the thermal radiation from a heater small.

本発明によれば、ヒータからの熱放射によって放出された電磁波の影響を小さくした状態でワークの温度を取得することができる。   According to the present invention, the temperature of the workpiece can be acquired in a state where the influence of the electromagnetic wave emitted by the thermal radiation from the heater is reduced.

本発明の一実施形態を示すろう付け装置の概略構成図である。It is a schematic block diagram of the brazing apparatus which shows one Embodiment of this invention. ろう付け装置の要部概略構成図である。It is a principal part schematic block diagram of a brazing apparatus. 制御系を示すブロック図である。It is a block diagram which shows a control system. 低反射部が設けられた熱交換器の図である。It is a figure of the heat exchanger provided with the low reflection part.

図１乃至図４は、本発明の一実施形態を示すものである。   1 to 4 show an embodiment of the present invention.

本発明の加熱炉及び加熱炉内におけるワーク温度取得方法が適用されるろう付け装置１は、車両用空気調和装置のエバポレータとして使用されるワークとしての熱交換器Ｗをろう付けするためのものである。熱交換器Ｗは、アルミニウム合金製の複数の部品を互いにろう付け接合することによって形成される。   A brazing apparatus 1 to which a heating furnace and a workpiece temperature acquisition method in the heating furnace of the present invention are applied is for brazing a heat exchanger W as a workpiece used as an evaporator of a vehicle air conditioner. is there. The heat exchanger W is formed by brazing and joining together a plurality of aluminum alloy parts.

このろう付け装置１は、図１に示すように、熱交換器Ｗを搬送するための搬送装置１０と、搬送装置１０の搬送方向における上流側から下流側に向かって順に、乾燥炉２０と、前室３０と、加熱炉４０と、冷却室５０と、後室６０と、を有している。   As shown in FIG. 1, the brazing device 1 includes a transport device 10 for transporting the heat exchanger W, a drying furnace 20 in order from the upstream side to the downstream side in the transport direction of the transport device 10, The front chamber 30, the heating furnace 40, the cooling chamber 50, and the rear chamber 60 are provided.

搬送装置１０は、例えば電動モータによって駆動する駆動ローラ１１と、回転自在に設けられた従動ローラ１２と、駆動ローラ１１及び従動ローラ１２に巻き掛けられたメッシュベルト１３と、を有している。搬送装置１０は、駆動ローラ１１を駆動させて、駆動ローラ１１及び従動ローラ１２に巻き掛けられたメッシュベルト１３を搬送方向に送ることで、メッシュベルト１３上に載置された熱交換器Ｗを搬送方向に移動させる。   The transport device 10 includes, for example, a driving roller 11 driven by an electric motor, a driven roller 12 that is rotatably provided, and a mesh belt 13 that is wound around the driving roller 11 and the driven roller 12. The conveying device 10 drives the driving roller 11 to send the mesh belt 13 wound around the driving roller 11 and the driven roller 12 in the conveying direction, thereby causing the heat exchanger W placed on the mesh belt 13 to move. Move in the transport direction.

乾燥炉２０は、炉内に電熱ヒータ２１を有し、電熱ヒータ２１によって炉内に位置する熱交換器Ｗを加熱することにより、熱交換器Ｗに塗布された加工油を蒸発させる。   The drying furnace 20 has an electric heater 21 in the furnace, and heats the heat exchanger W located in the furnace by the electric heater 21 to evaporate the processing oil applied to the heat exchanger W.

前室３０は、室内に窒素ガスが供給されており、室内の熱交換器Ｗが窒素ガス雰囲気中に位置している。   The front chamber 30 is supplied with nitrogen gas, and the indoor heat exchanger W is located in the nitrogen gas atmosphere.

加熱炉４０は、炉内に窒素ガスが供給されている。また、加熱炉４０は、炉内に複数の電熱ヒータ４１を有し、電熱ヒータ４１によって炉内に位置する熱交換器Ｗを加熱してろう付けを行う。加熱炉４０は、熱交換器Ｗの搬送方向に複数のゾーン１，２，…，ｎ（以降、１〜ｎと記載する）に分割されており、搬送方向の上流側から下流側に向かって、例えば＋４００℃〜＋６００℃の範囲内で徐々に炉内の温度が高くなるように、それぞれのゾーン１〜ｎにおける電熱ヒータ４１−１，４１−２，…，４１−ｎ（以降、４１−１〜ｎと記載する）の出力が調整される。   The heating furnace 40 is supplied with nitrogen gas in the furnace. Moreover, the heating furnace 40 has a plurality of electric heaters 41 in the furnace, and heats the heat exchanger W located in the furnace by the electric heaters 41 to perform brazing. The heating furnace 40 is divided into a plurality of zones 1, 2,..., N (hereinafter referred to as 1 to n) in the transport direction of the heat exchanger W, and from the upstream side to the downstream side in the transport direction. For example, the electric heaters 41-1, 41-2,..., 41-n (hereinafter referred to as 41-n in each of the zones 1 to n) so that the temperature in the furnace gradually increases within a range of + 400 ° C. to + 600 ° C. 1 to n) is adjusted.

また、加熱炉４０のそれぞれのゾーン１〜ｎの出口側には、図２に示すように、加熱炉４０のゾーンとゾーンとを連結する連結部４０ａが形成されている。連結部４０ａの上面には、炉内において搬送装置１０によって搬送される熱交換器Ｗに設けられた後述する低反射部の温度を炉外から検出するための窓４０ｂが設けられている。   Moreover, as shown in FIG. 2, the connection part 40a which connects the zone of the heating furnace 40 is formed in the exit side of each zone 1-n of the heating furnace 40. As shown in FIG. On the upper surface of the connecting portion 40a, a window 40b is provided for detecting the temperature of a low reflection portion, which will be described later, provided in the heat exchanger W transported by the transport device 10 in the furnace from the outside of the furnace.

連結部４０ａにおける熱交換器Ｗの搬送方向の両側には、加熱炉４０内における熱放射によって加熱炉４０のゾーン１〜ｎから連結部４０ａに到達する電磁波を遮蔽する遮蔽壁４０ｃが設けられている。遮蔽壁４０ｃは、加熱炉４０のゾーン１〜ｎ側と連結部４０ａ側とを仕切るように設けられ、搬送装置１０によって搬送される熱交換器Ｗが通過可能な開口４０ｃ１を有している。   On both sides of the connecting portion 40a in the conveying direction of the heat exchanger W, shielding walls 40c are provided to shield electromagnetic waves reaching the connecting portion 40a from the zones 1 to n of the heating furnace 40 by heat radiation in the heating furnace 40. Yes. The shielding wall 40c is provided so as to partition the zone 1 to n side of the heating furnace 40 and the connecting portion 40a side, and has an opening 40c1 through which the heat exchanger W conveyed by the conveying device 10 can pass.

また、遮蔽壁４０ｃの連結部４０ａ側の面には、後述する温度計によって熱交換器Ｗの温度を検出する際に、遮蔽壁４０ｃからの熱放射の影響を抑制するための壁面冷却部４０ｄが設けられている。壁面冷却部４０ｄは、遮蔽壁４０ｃの壁面に沿って形成された冷却水流路に冷却水を流通させることで遮蔽壁４０ｃの壁面を冷却するものである。   Further, on the surface of the shielding wall 40c on the side of the connecting part 40a, a wall surface cooling part 40d for suppressing the influence of heat radiation from the shielding wall 40c when detecting the temperature of the heat exchanger W with a thermometer to be described later. Is provided. The wall surface cooling unit 40d cools the wall surface of the shielding wall 40c by circulating cooling water through a cooling water flow path formed along the wall surface of the shielding wall 40c.

また、壁面冷却部４０ｄの連結部４０ａ側の面には、後述する温度計によって熱交換器Ｗの温度を検出する際に、壁面冷却部４０ｄからの熱反射の影響を抑制するための仮反射部４０ｅが設けられている。仮反射部４０ｅは、例えばドライエッチングによって表面に微細な凹凸が複数形成された反射防止構造を有し、入射光に対する反射光の反射率が所定の反射率以下となる。   Further, the surface of the wall surface cooling section 40d on the side of the connecting section 40a is temporarily reflected to suppress the influence of heat reflection from the wall surface cooling section 40d when the temperature of the heat exchanger W is detected by a thermometer to be described later. A portion 40e is provided. The temporary reflecting portion 40e has an antireflection structure in which a plurality of fine irregularities are formed on the surface by dry etching, for example, and the reflectance of the reflected light with respect to the incident light is equal to or lower than a predetermined reflectance.

冷却室５０は、炉内に窒素ガスが供給されており、室内に充満した窒素ガス雰囲気中においてろう付けされた熱交換器Ｗを冷却する。   The cooling chamber 50 is supplied with nitrogen gas in the furnace, and cools the heat exchanger W brazed in a nitrogen gas atmosphere filled in the chamber.

後室６０には、冷却室５０において冷却され、ろう付けが完了した熱交換器Ｗが搬送される。   The heat exchanger W that has been cooled in the cooling chamber 50 and brazed is transported to the rear chamber 60.

また、ろう付け装置１は、図３に示すように、電熱ヒータ４１の出力を制御するためのコントローラ７０を備えている。   Moreover, the brazing apparatus 1 is provided with the controller 70 for controlling the output of the electric heater 41, as shown in FIG.

コントローラ７０は、ＣＰＵ、ＲＯＭ，ＲＡＭを有している。コントローラ７０は、入力側に接続された装置からの入力信号を受信すると、ＣＰＵが、入力信号に基づいてＲＯＭに記憶されたプログラムを読み出すとともに、入力信号によって検出された状態をＲＡＭに記憶したり、出力側に接続された装置に出力信号を送信したりする。   The controller 70 has a CPU, ROM, and RAM. When the controller 70 receives an input signal from a device connected to the input side, the CPU reads a program stored in the ROM based on the input signal, and stores a state detected by the input signal in the RAM. The output signal is transmitted to a device connected to the output side.

コントローラ７０の入力側には、加熱炉４０において搬送装置１０によって搬送される熱交換器Ｗの温度を窓４０ｂを介して炉外から計測するための非接触式の複数の温度計７１−１，７１−２，…，７１−ｎ（以降、７１−１〜ｎと記載する）が接続されている。また、コントローラ７０の出力側には、複数の電熱ヒータ４１−１〜ｎが接続されている。   On the input side of the controller 70, a plurality of non-contact type thermometers 71-1 for measuring the temperature of the heat exchanger W conveyed by the conveying device 10 in the heating furnace 40 from the outside of the furnace through the window 40 b, 71-2, ..., 71-n (hereinafter referred to as 71-1 to n) are connected. A plurality of electric heaters 41-1 to 41-n are connected to the output side of the controller 70.

複数の温度計７１−１〜ｎは、互いに異なる二つの測定波長のそれぞれの輝度を比較することによって温度を計測する二色式の放射温度計が用いられる。複数の温度計７１−１〜ｎは、図２に示すように、窓４０ｂの炉外側に取り付けられ、搬送装置１０によって搬送される熱交換器Ｗの後述する低反射部の温度を上方から計測する。   As the plurality of thermometers 71-1 to 71-n, a two-color radiation thermometer that measures the temperature by comparing the brightness of two different measurement wavelengths is used. As shown in FIG. 2, the plurality of thermometers 71-1 to 7-n are attached to the outside of the furnace of the window 40b, and measure the temperature of a low reflection portion (described later) of the heat exchanger W conveyed by the conveying device 10 from above. To do.

熱交換器Ｗは、冷媒と熱交換する空気の流通方向に並ぶ一対の熱交換ユニット１００を有している。熱交換ユニット１００は、図４に示すように、互いに間隔をおいて配置された一対のヘッダ１０１と、一対のヘッダ１０１の間を連結する複数の扁平チューブ１０２と、隣り合う扁平チューブ１０２の間に設けられたフィン１０３と、を有している。   The heat exchanger W includes a pair of heat exchange units 100 arranged in the flow direction of the air that exchanges heat with the refrigerant. As shown in FIG. 4, the heat exchange unit 100 includes a pair of headers 101 that are spaced apart from each other, a plurality of flat tubes 102 that connect between the pair of headers 101, and adjacent flat tubes 102. And fins 103 provided on the surface.

一方の熱交換ユニット１００の一方のヘッダ１０１には、熱交換器Ｗにおいて空気と熱交換する冷媒を流入させるための冷媒流入管１０１ａが接続されている。また、他方の熱交換ユニット１００の一方のヘッダ１０１には、熱交換器Ｗにおいて空気と熱交換した冷媒を流出させるための冷媒流出管１０１ｂが接続されている。   One header 101 of one heat exchange unit 100 is connected to a refrigerant inflow pipe 101a for allowing a refrigerant to exchange heat with air in the heat exchanger W. In addition, a refrigerant outflow pipe 101 b for allowing the refrigerant that has exchanged heat with air in the heat exchanger W to flow out is connected to one header 101 of the other heat exchange unit 100.

冷媒流入管１０１ａの外周面には、電熱ヒータ４１からの熱放射によって放出される電磁波の反射率が所定の反射率以下の低反射部８０が設けられている。   On the outer peripheral surface of the refrigerant inflow pipe 101a, there is provided a low reflection portion 80 in which the reflectance of electromagnetic waves emitted by heat radiation from the electric heater 41 is equal to or lower than a predetermined reflectance.

低反射部８０は、例えば、ドライエッチングによって表面に微細の凹凸が複数形成された反射防止構造を有し、入射光に対する反射光の反射率が所定の反射率以下となる。   The low reflection portion 80 has an antireflection structure in which a plurality of fine irregularities are formed on the surface by dry etching, for example, and the reflectance of the reflected light with respect to the incident light is equal to or lower than a predetermined reflectance.

以上のように構成されたろう付け装置１において、搬送装置１０によって搬送される熱交換器Ｗは、乾燥炉２０、前室３０、加熱炉４０、冷却室５０、後室６０、を順に通過することでろう付けが行われ、複数の構成部品が互いに接合されて一体に形成される。   In the brazing device 1 configured as described above, the heat exchanger W transported by the transport device 10 sequentially passes through the drying furnace 20, the front chamber 30, the heating furnace 40, the cooling chamber 50, and the rear chamber 60. Then, brazing is performed, and a plurality of components are joined together to form a single body.

ろう付け装置１によって熱交換器Ｗをろう付けする際に、コントローラ７０は、複数の温度計７１−１〜ｎによって計測された熱交換器Ｗの温度に基づいて電熱ヒータ４１−１〜ｎの出力を調整する。   When the heat exchanger W is brazed by the brazing device 1, the controller 70 sets the electric heaters 41-1 to 4n based on the temperature of the heat exchanger W measured by the plurality of thermometers 71-1 to n. Adjust the output.

熱交換器Ｗの温度は、遮蔽壁４０ｃによって囲まれた連結部４０ａにおいて温度計７１−１〜ｎによって計測されるので、加熱炉４０の各ゾーン１〜ｎに設けられた電熱ヒータ４１−１〜ｎからの熱放射の影響を小さくした状態で取得される。   Since the temperature of the heat exchanger W is measured by the thermometers 71-1 to n in the connecting portion 40a surrounded by the shielding wall 40c, the electric heater 41-1 provided in each zone 1 to n of the heating furnace 40. It is acquired in a state where the influence of thermal radiation from ~ n is reduced.

熱交換器Ｗの温度を計測する際には、温度計７１−１〜ｎによって熱交換器Ｗに設けられた低反射部８０の温度を計測する。低反射部８０は、温度計７１−１〜ｎによって取得した画像の画像処理パターン認識によって特定することが可能である。また、低反射部８０の温度を取得するためには、搬送装置１０の駆動ローラ１１の回転数を計測し、温度計７１−１〜ｎによって低反射部８０が計測されるタイミングにおける温度計７１−１〜ｎの検出結果を、低反射部８０の温度として取得してもよい。   When measuring the temperature of the heat exchanger W, the temperature of the low reflection part 80 provided in the heat exchanger W is measured by the thermometers 71-1 to 71-n. The low reflection part 80 can be specified by image processing pattern recognition of images acquired by the thermometers 71-1 to 71-n. Moreover, in order to acquire the temperature of the low reflection part 80, the rotation speed of the drive roller 11 of the conveying apparatus 10 is measured, and the thermometer 71 at the timing when the low reflection part 80 is measured by the thermometers 71-1 to n. The detection results of −1 to n may be acquired as the temperature of the low reflection unit 80.

また、コントローラ７０は、各ゾーン１〜ｎを通過後の連結部４０ａにおいて、温度計７１−１〜ｎによって熱交換器Ｗの低反射部８０の温度を計測する。   Moreover, the controller 70 measures the temperature of the low reflection part 80 of the heat exchanger W by the thermometers 71-1 to n in the connection part 40a after passing through the zones 1 to n.

これにより、熱交換器Ｗの温度は、電熱ヒータ４１からの熱放射によって放出された電磁波の反射の影響を小さくした状態で取得される。   Thereby, the temperature of the heat exchanger W is acquired in a state where the influence of the reflection of the electromagnetic wave emitted by the heat radiation from the electric heater 41 is reduced.

このように、本実施形態の温度計測システムによれば、熱交換器Ｗに到達する電磁波を遮蔽するように設けられる遮蔽壁４０ｃと、遮蔽壁４０ｃによって区画形成された連結部４０ａにおける熱交換器Ｗの温度を検出するように設けられる非接触式の温度計７１−１〜ｎと、を備えている。   As described above, according to the temperature measurement system of the present embodiment, the shielding wall 40c provided so as to shield the electromagnetic wave reaching the heat exchanger W, and the heat exchanger in the connecting portion 40a partitioned by the shielding wall 40c. Non-contact thermometers 71-1 to 71-n provided to detect the temperature of W.

また、本実施形態の加熱炉によれば、炉内に位置する熱交換器Ｗの温度を検出する非接触式の温度計７１−１〜ｎと、温度計７１−１〜ｎによって炉内の熱交換器Ｗの温度を検出する際に、熱放射によって熱交換器Ｗに到達する電磁波を遮蔽する遮蔽壁４０ｃと、を備えている。   Moreover, according to the heating furnace of this embodiment, the non-contact-type thermometers 71-1 to n for detecting the temperature of the heat exchanger W located in the furnace and the thermometers 71-1 to n in the furnace When detecting the temperature of the heat exchanger W, a shielding wall 40c that shields electromagnetic waves reaching the heat exchanger W by heat radiation is provided.

また、本実施形態のワーク温度取得方法によれば、熱放射によって熱交換器Ｗに到達する電磁波を遮蔽壁４０ｃによって遮蔽し、遮蔽壁４０ｃによって電磁波の到達が遮蔽された状態の熱交換器Ｗの温度を、非接触式の温度計７１−１〜ｎによって計測する。   Further, according to the work temperature acquisition method of the present embodiment, the electromagnetic wave reaching the heat exchanger W by heat radiation is shielded by the shielding wall 40c, and the heat exchanger W in a state where the arrival of the electromagnetic wave is shielded by the shielding wall 40c. Are measured by non-contact type thermometers 71-1 to 71-n.

これにより、電熱ヒータ４１からの熱放射によって放出された電磁波の影響を小さくした状態で熱交換器Ｗの温度を取得することができるので、取得した熱交換器Ｗの温度に基づいて電熱ヒータ４１の出力を制御することによって熱交換器Ｗを確実に目標の温度に加熱することが可能なり、熱交換器Ｗの金属部品同士の接合不良を抑制することが可能となる。   Thereby, since the temperature of the heat exchanger W can be acquired in a state where the influence of the electromagnetic wave emitted by the heat radiation from the electric heater 41 is reduced, the electric heater 41 is based on the acquired temperature of the heat exchanger W. By controlling the output, it is possible to reliably heat the heat exchanger W to the target temperature, and to suppress the bonding failure between the metal parts of the heat exchanger W.

また、温度計７１−１〜ｎは、二色式の放射温度計である。   The thermometers 71-1 to 71-n are two-color radiation thermometers.

これにより、熱交換器Ｗと放射率が異なる、ろう付けの際に生じるヒュームや、加工油、フラックス等が熱交換器Ｗに付着した状態においても、確実に熱交換器Ｗの温度を計測することが可能となる。   Thereby, the temperature of the heat exchanger W is reliably measured even in a state where fumes generated during brazing, processing oil, flux, and the like, which have an emissivity different from that of the heat exchanger W, are attached to the heat exchanger W. It becomes possible.

尚、前記実施形態では、加熱対象物であるワークとしての熱交換器Ｗをろう付けするための加熱炉４０に本発明を適用したものを示したが、これに限られるものではない。例えば、熱交換器Ｗ以外のろう付けを行う物品を加熱する加熱炉においても本発明を適用することが可能である。   In the above-described embodiment, the present invention is applied to the heating furnace 40 for brazing the heat exchanger W as a work to be heated. However, the present invention is not limited to this. For example, the present invention can be applied to a heating furnace that heats an article to be brazed other than the heat exchanger W.

また、前記実施形態では、ろう付けを行う加熱炉４０に本発明を適用したものを示したが、ろう付け工程以外の加熱対象物を加熱する工程で用いられる加熱炉に本発明を適用してもよい。   Moreover, in the said embodiment, what applied this invention to the heating furnace 40 which brazes was shown, However, This invention is applied to the heating furnace used in the process of heating the heating target object other than a brazing process. Also good.

また、前記実施形態では、二色式の放射温度計を温度計７１として用いたものを示したが、非接触式の温度計であれば例えば単色式の放射温度計を用いてもよい。   In the above embodiment, a two-color radiation thermometer is used as the thermometer 71. However, for example, a monochromatic radiation thermometer may be used as long as it is a non-contact thermometer.

また、前記実施形態では、加熱炉４０のゾーン１〜ｎ側と連結部４０ａ側とを仕切るように設けられ、搬送装置１０によって搬送される熱交換器Ｗが通過可能な開口４０ｃ１を有する遮蔽壁４０ｃを示したが、これに限られるものではない。熱交換器Ｗの温度を計測する際に、加熱炉４０のゾーン１〜ｎ側と連結部４０ａ側とを仕切るものであれば、例えば、開口４０ｃ１を有さない可動式の遮蔽壁によって、熱交換器Ｗの温度の計測の際にのみ加熱炉４０のゾーン１〜ｎ側と連結部４０ａ側とを仕切るようにしてもよい。この場合には、熱交換器Ｗの温度の計測時以外に、遮蔽壁を加熱炉４０外に位置させることが可能となるので、遮蔽壁の連結部４０ａ側の面を冷却する壁面冷却部４０ｄを必要としない。また、この場合には、熱交換器Ｗを通過させるための開口が必要なくなることから、加熱炉４０のゾーン１〜ｎ側と連結部４０ａ側とを完全に仕切ることが可能となる。   Moreover, in the said embodiment, it is provided so that the zone 1-n side of the heating furnace 40 and the connection part 40a side may be partitioned, and the shielding wall which has the opening 40c1 which the heat exchanger W conveyed by the conveying apparatus 10 can pass through. Although 40c is shown, it is not limited to this. When the temperature of the heat exchanger W is measured, if the zone 1 to n side of the heating furnace 40 and the connecting portion 40a side are separated, for example, heat can be generated by a movable shielding wall having no opening 40c1. You may make it partition the zone 1-n side of the heating furnace 40, and the connection part 40a side only at the time of the measurement of the temperature of the exchanger W. FIG. In this case, since the shielding wall can be positioned outside the heating furnace 40 except when the temperature of the heat exchanger W is measured, the wall surface cooling unit 40d that cools the surface of the shielding wall on the connecting portion 40a side. Do not need. Further, in this case, since an opening for allowing the heat exchanger W to pass through is not necessary, it is possible to completely partition the zone 1 to n side of the heating furnace 40 and the connecting portion 40a side.

４０…加熱炉、４０ｃ…遮蔽壁、４１…電熱ヒータ、７０…コントローラ、７１−１〜ｎ…温度計、Ｗ…熱交換器。   40 ... heating furnace, 40c ... shielding wall, 41 ... electric heater, 70 ... controller, 71-1 to n ... thermometer, W ... heat exchanger.

Claims (4)

ワークに到達する電磁波を吸収または遮蔽するように設けられる遮蔽壁と、
該遮蔽壁によって少なくとも部分的に区画形成された領域におけるワークの温度を検出するように設けられる非接触式の温度計と、を備えた
温度計測システム。 A shielding wall provided to absorb or shield electromagnetic waves reaching the workpiece;
And a non-contact thermometer provided to detect the temperature of the workpiece in an area at least partially partitioned by the shielding wall. 温度計は、二色式の放射温度計である
請求項１に記載の温度計測システム。 The temperature measurement system according to claim 1, wherein the thermometer is a two-color radiation thermometer. 請求項１または２に記載の温度計測システムを有する
加熱炉。 A heating furnace comprising the temperature measurement system according to claim 1. ヒータによって加熱されたワークの温度を取得する加熱炉内におけるワーク温度取得方法であって、
熱放射によってワークに到達する電磁波を遮蔽壁によって吸収または遮蔽し、
遮蔽壁によって電磁波の到達が吸収または遮蔽された状態のワークの温度を、非接触式の温度計によって計測する
加熱炉内におけるワーク温度取得方法。 A workpiece temperature acquisition method in a heating furnace for acquiring the temperature of a workpiece heated by a heater,
The electromagnetic wave that reaches the workpiece by thermal radiation is absorbed or shielded by the shielding wall,
A method for obtaining a workpiece temperature in a heating furnace in which the temperature of a workpiece in which the arrival of electromagnetic waves is absorbed or shielded by a shielding wall is measured by a non-contact type thermometer.
JP2018104708A 2018-05-31 2018-05-31 Temperature measurement system, heating furnace, and workpiece temperature acquisition method in heating furnace Pending JP2019211227A (en)

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