JP6348828B2

JP6348828B2 - Steam generator

Info

Publication number: JP6348828B2
Application number: JP2014245276A
Authority: JP
Inventors: 田中　克幸; 克幸田中; 義朗熊切; 鈴木　英二; 英二鈴木
Original assignee: HOSHIZAKI KABUSHIKI KAISHA
Current assignee: HOSHIZAKI KABUSHIKI KAISHA
Priority date: 2014-12-03
Filing date: 2014-12-03
Publication date: 2018-06-27
Anticipated expiration: 2034-12-03
Also published as: JP2016109328A

Description

本発明は、スチームコンベクションオーブン等の加熱調理器に用いる蒸気発生装置に関する。 The present invention relates to a steam generator used in a cooking device such as a steam convection oven.

下記の特許文献１には、蒸気を含んだ熱風により食材を加熱調理するスチームコンベクションオーブンが開示されており、このスチームコンベクションオーブンは、調理庫内に蒸気を供給する蒸気発生装置を備えている。このスチームコンベクションオーブンの蒸気発生装置は、所定量の水を貯えて蒸気を発生させる筒形の蒸気発生容器と、蒸気発生容器の外周に巻回された誘導加熱コイルと、蒸気発生容器内に収容されて誘導加熱コイルに高周波電流を供給することで発熱して蒸気発生容器内の水を加熱する加熱体と、蒸気発生容器の上部に取り付けられて調理庫内に蒸気を送出する蒸気導出筒とを備えている。 The following Patent Document 1 discloses a steam convection oven that heats and cooks food with hot air containing steam, and this steam convection oven includes a steam generator that supplies steam into a cooking chamber. The steam generation device of this steam convection oven stores a predetermined amount of water to generate steam, a cylindrical steam generation container, an induction heating coil wound around the outer periphery of the steam generation container, and housed in the steam generation container A heating element that generates heat by supplying high-frequency current to the induction heating coil and heats the water in the steam generating container; and a steam outlet tube that is attached to the upper part of the steam generating container and sends steam into the cooking chamber. It has.

蒸気発生装置の加熱体は、蒸気発生容器の上部に支持された略環状平板のホルダと、このホルダに上端部が固定されて蒸気発生容器内に吊設された７本の加熱棒とを有している。ホルダの外周部には外側に突出した６つの突部が等間隔に形成されており、加熱体はホルダのこれら突部を蒸気発生容器の内周面に係止させることにより蒸気発生容器内に支持されている。加熱棒は蒸気発生容器内にて誘導加熱コイルと同じ高さ位置にて発熱する発熱部と、発熱部より高い位置にて発熱しない非発熱部とを有している。７本の加熱棒のうちの１つの加熱棒の非発熱部には径方向に挿通孔が形成され、蒸気発生容器の周面上部には加熱棒の挿通孔と対向する位置に貫通孔が形成され、蒸気発生容器の外側から貫通孔に挿入したサーミスタ等のワイヤ状の温度センサを加熱棒の非発熱部の挿通孔に嵌挿して、温度センサの検出温度に基づいて加熱体の過熱状態を検知するようにしている。 The heating element of the steam generating device has a substantially annular flat plate holder supported on the upper part of the steam generating container, and seven heating rods having an upper end fixed to the holder and suspended in the steam generating container. doing. Six protrusions projecting outward are formed at equal intervals on the outer peripheral part of the holder, and the heating body locks the protrusions of the holder on the inner peripheral surface of the steam generation container, thereby bringing the protrusion into the steam generation container. It is supported. The heating rod has a heat generating part that generates heat at the same height as the induction heating coil in the steam generating container, and a non-heat generating part that does not generate heat at a position higher than the heat generating part. A non-heat generating portion of one of the seven heating rods is formed with an insertion hole in the radial direction, and a through hole is formed in the upper portion of the peripheral surface of the steam generating container at a position facing the insertion hole of the heating rod. A wire-type temperature sensor such as a thermistor inserted into the through-hole from the outside of the steam generating container is inserted into the insertion hole of the non-heating part of the heating rod, and the overheating state of the heating body is determined based on the temperature detected by the temperature sensor. I try to detect it.

特開２０１２−２２９８３７号公報JP 2012-229837 A

特許文献１の蒸気発生装置においては、７本の加熱棒のうちの１つの加熱棒の非発熱部には径方向に挿通孔を形成し、蒸気発生容器の周面上部には加熱棒の挿通孔と対向する位置に貫通孔を形成し、蒸気発生容器の外側から貫通孔に挿入したワイヤ状の温度センサをさらに蒸気発生容器内に径方向に進行させることで加熱棒の非発熱部の挿通孔に嵌挿するようにしている。しかし、蒸気発生容器や加熱体の寸法公差により、蒸気発生容器の貫通孔から挿入したワイヤ状の温度センサをさらに蒸気発生容器の径方向に進行させても、温度センサが加熱棒の非発熱部の挿通孔からずれて嵌挿されないことがあった。温度センサにより加熱棒の非発熱部の温度を正確に検出できないと、加熱体が過熱状態であることを検知できないことがあった。これに対して、例えば、蒸気発生装置の各部品を組み付けるときに、蒸気発生容器の上側からワイヤ状の温度センサが加熱棒の非発熱部の挿通孔に嵌挿されていることを目視確認することも検討されたが、蒸気発生容器の貫通孔と加熱棒の非発熱部の挿通孔とを結ぶ直線上の直上に加熱体のホルダの突部が形成されており、ホルダの突部によって温度センサが加熱棒の非発熱部の挿通孔に挿通されているか否かを確認することができなかった。本発明は、蒸気発生装置の加熱体の過熱状態を検知するための温度センサが加熱棒の非発熱部の挿通孔に挿通されていることを確認できるようにすることを目的とする。 In the steam generator of Patent Document 1, an insertion hole is formed in the radial direction in the non-heating portion of one of the seven heating rods, and the heating rod is inserted in the upper peripheral surface of the steam generation vessel. A through-hole is formed at a position opposite to the hole, and a wire-like temperature sensor inserted into the through-hole from the outside of the steam generation container is further advanced in the radial direction into the steam generation container, thereby inserting the non-heating portion of the heating rod. It fits in the hole. However, due to the dimensional tolerance of the steam generating container and the heating element, even if the wire-shaped temperature sensor inserted from the through hole of the steam generating container is further advanced in the radial direction of the steam generating container, the temperature sensor is not heated by the non-heating part of the heating rod. In some cases, it was not inserted by shifting from the insertion hole. If the temperature sensor cannot accurately detect the temperature of the non-heating portion of the heating rod, it may not be possible to detect that the heating body is in an overheated state. On the other hand, for example, when assembling each component of the steam generating device, it is visually confirmed that the wire-shaped temperature sensor is inserted into the insertion hole of the non-heating portion of the heating rod from the upper side of the steam generating container. However, a protrusion of the holder of the heating element is formed immediately above the straight line connecting the through hole of the steam generation container and the insertion hole of the non-heating portion of the heating rod, and the temperature of the holder protrusion is It was not possible to confirm whether or not the sensor was inserted into the insertion hole of the non-heating part of the heating rod. An object of this invention is to enable it to confirm that the temperature sensor for detecting the overheating state of the heating body of a steam generator is inserted in the insertion hole of the non-heating part of a heating rod.

本発明は、上記の課題を解決するために、所定量の水を貯えて蒸気を発生させる筒形の蒸気発生容器と、蒸気発生容器の外周に巻回された誘導加熱コイルと、蒸気発生容器内に収容されて誘導加熱コイルに高周波電流を供給することで発熱して蒸気発生容器内の水を加熱する加熱体とを備え、加熱体は蒸気発生容器の上部に支持されたホルダと、このホルダに上端部が固定されて蒸気発生容器内に吊設された複数の加熱棒とを有し、加熱棒は誘導加熱コイルと同じ高さ位置にて発熱する発熱部と、該発熱部より高い位置にて発熱しない非発熱部とを有し、複数の加熱棒のうちの１つの加熱棒の非発熱部には径方向に挿通孔を形成するとともに、蒸気発生容器の周面上部には挿通孔と対向する位置に貫通孔を形成し、蒸気発生容器の貫通孔に外側から挿入した温度センサを加熱棒の非発熱部の挿通孔に嵌挿し、温度センサの検出温度に基づいて加熱体の過熱状態を検知するようにした蒸気発生装置であって、ホルダの外周部には周方向に沿って外側に突出する複数の突部が形成され、複数の突部を蒸気発生容器の内周部に係合させることで加熱体を蒸気発生容器内に支持させるようにし、ホルダの複数の突部を蒸気発生容器の貫通孔と加熱棒の非発熱部の挿通孔とを結ぶ直線上の直上を避けるように配置したことを特徴とする蒸気発生装置を提供するものである。 In order to solve the above-described problems, the present invention provides a cylindrical steam generation container that stores a predetermined amount of water to generate steam, an induction heating coil wound around the outer periphery of the steam generation container, and a steam generation container And a heating element that generates heat by supplying a high-frequency current to the induction heating coil and heats the water in the steam generation container. The heating body includes a holder supported on the upper part of the steam generation container, A plurality of heating rods, the upper end of which is fixed to the holder and suspended in the steam generation container, the heating rods generating heat at the same height as the induction heating coil, and higher than the heating portions A non-heat generating portion that does not generate heat at a position, and a non-heat generating portion of one of the plurality of heating rods is formed with an insertion hole in the radial direction and is inserted into the upper peripheral surface of the steam generating container A through hole is formed at a position opposite to the hole, and it is outside the through hole of the steam generating container. The steam generator is inserted into the insertion hole of the non-heating part of the heating rod and detects the overheating state of the heating body based on the temperature detected by the temperature sensor. Is formed with a plurality of protrusions protruding outward along the circumferential direction, and the plurality of protrusions are engaged with the inner peripheral portion of the steam generation container so that the heating body is supported in the steam generation container. A plurality of protrusions are arranged so as to avoid a position directly above a straight line connecting the through hole of the steam generating container and the insertion hole of the non-heat generating portion of the heating rod.

上記のように構成した蒸気発生装置においては、ホルダの外周部には周方向に沿って外側に突出する複数の突部が形成され、複数の突部を蒸気発生容器の内周部に係合させることで加熱体を蒸気発生容器内に支持させるようにし、ホルダの複数の突部を蒸気発生容器の貫通孔と加熱棒の非発熱部の挿通孔とを結ぶ直線上の直上を避けるように配置したので、蒸気発生容器の貫通孔に外側から挿入した温度センサが加熱棒の非発熱部の挿通孔に嵌挿されていることを蒸気発生容器の上側からホルダの突部によって遮られることなく目視によって確認できるようになった。 In the steam generator configured as described above, a plurality of protrusions are formed on the outer peripheral portion of the holder so as to protrude outward along the circumferential direction, and the plurality of protrusions are engaged with the inner peripheral portion of the steam generating container. So that the heating element is supported in the steam generation container, so that the plurality of protrusions of the holder are not directly above the straight line connecting the through hole of the steam generation container and the insertion hole of the non-heating part of the heating rod. Because it is arranged, the temperature sensor inserted from the outside into the through hole of the steam generating container is inserted into the insertion hole of the non-heating part of the heating rod without being blocked by the protrusion of the holder from the upper side of the steam generating container It can be confirmed by visual inspection.

上記のように構成した蒸気発生装置においては、蒸気発生容器の内周面上部には蒸気発生容器の貫通孔が加熱棒の挿通孔と対向する位置にてホルダの複数の突部に係合する複数の係合溝部を形成し、ホルダの複数の突部を蒸気発生容器の複数の係合溝部に係合させるのが好ましく、このようにしたときには、ホルダの突部を蒸気発生容器の係合溝部に係合させたときに、蒸気発生容器の貫通孔が加熱棒の挿通孔と対向する位置となり、加熱体の蒸気発生容器の周方向及び上下方向に対する位置決めを容易とすることができた。また、このように構成した蒸気発生装置においては、ホルダの複数の突部の一部と蒸気発生容器の複数の係合溝部の一部とを加熱体の蒸気発生容器に対する周方向の位置決めをするための位置決め用突部と位置決め用係合溝部とし、蒸気発生容器の貫通孔が加熱棒の挿通孔と対向する位置に配置したときだけ、位置決め突部が位置決め用係合溝部に係合するようにしたのが好ましく、このようにしたときには、蒸気発生容器の貫通孔が加熱棒の挿通孔と対向しない位置で、ホルダの複数の突部が蒸気発生容器の複数の係合溝部に係合するのを防ぐことができた。また、このように構成した蒸気発生装置においては、蒸気発生容器の上部には加熱体の上側にて蒸気発生容器の内周面上部に嵌合する筒形のスペーサを設け、スペーサの下部には突部の上側にて係合溝部に係合する複数の突起部を形成するのが好ましく、このようにしたときには、ホルダの突部がスペーサの突起部によって係合溝部の底部に押し込まれた状態で係合されるようになり、加熱体の上下方向の位置がずれるのを防ぐことができた。また、ホルダの突部がスペーサの突起部によって上方に移動するのを規制されるようになったので、蒸気発生装置の輸送をするときに、加熱体が蒸気発生容器の内部で上下に動くのを防ぐことができた。さらに、ホルダの複数の突部が蒸気発生容器の複数の係合溝部の間の部分に引っ掛かった状態でスペーサを蒸気発生容器の内周面上部に嵌合させたときには、スペーサが正常時より高い位置で蒸気発生容器の上部に嵌合することになり、スペーサの上下方向の位置を確認することで、ホルダの突部が蒸気発生容器の係合溝部の底部に係合しているか否かを確認することができるようになった。 In the steam generator configured as described above, the through hole of the steam generating container is engaged with the plurality of protrusions of the holder at a position facing the insertion hole of the heating rod on the inner peripheral surface of the steam generating container. It is preferable to form a plurality of engagement grooves and engage the plurality of protrusions of the holder with the plurality of engagement grooves of the steam generation container. In this case, the protrusions of the holder are engaged with the steam generation container. When engaged with the groove, the through hole of the steam generating container is positioned to face the insertion hole of the heating rod, and positioning of the heating body in the circumferential direction and the vertical direction of the steam generating container can be facilitated. Further, in the steam generator configured as described above, the circumferential positioning of the heating body with respect to the steam generating container is performed with a part of the plurality of protrusions of the holder and a part of the plurality of engaging grooves of the steam generating container. The positioning protrusion is engaged with the positioning engagement groove only when the through hole of the steam generating container is disposed at a position facing the insertion hole of the heating rod. In this case, the plurality of protrusions of the holder engage with the plurality of engaging grooves of the steam generating container at a position where the through hole of the steam generating container does not face the insertion hole of the heating rod. I was able to prevent. In the steam generator configured as described above, a cylindrical spacer that is fitted to the upper part of the inner peripheral surface of the steam generating container is provided on the upper part of the steam generating container at the upper part of the heating body, and the lower part of the spacer It is preferable to form a plurality of protrusions that engage with the engagement groove on the upper side of the protrusion, and when this is done, the protrusion of the holder is pushed into the bottom of the engagement groove by the protrusion of the spacer. It was possible to prevent the position of the heating body from shifting in the vertical direction. In addition, since the protrusion of the holder is restricted from moving upward by the protrusion of the spacer, the heating element moves up and down inside the steam generation container when the steam generator is transported. Was able to prevent. Furthermore, when the spacer is fitted to the upper part of the inner peripheral surface of the steam generating container with the plurality of protrusions of the holder being caught in the portions between the plurality of engaging grooves of the steam generating container, the spacer is higher than normal. It will be fitted to the top of the steam generating container at the position, and by checking the vertical position of the spacer, it can be determined whether or not the protrusion of the holder is engaged with the bottom of the engaging groove of the steam generating container. Now you can confirm.

本発明の蒸気発生装置の斜視図である。It is a perspective view of the steam generator of this invention. 図１のＡ−Ａ線における一部破断断面図である。It is a partially broken sectional view in the AA line of FIG. 図１の蒸気送出筒を取り外したときの蒸気発生容器の平面図である。It is a top view of a steam generation container when the steam delivery pipe | tube of FIG. 1 is removed. 蒸気発生容器の上側部の図３のＢ−Ｂ線での断面図（ａ）と、Ｃ−Ｃ線での断面図（ｂ）である。It is sectional drawing (a) in the BB line of FIG. 3 of the upper part of a steam generation container, and sectional drawing (b) in CC line. 加熱体の斜視図（ａ）であり、Ｄ−Ｄ線の断面図（ｂ）である。It is a perspective view (a) of a heating body, and is sectional drawing (b) of the DD line. スペーサの斜視図（ａ）と、底面図（ｂ）である。It is the perspective view (a) and bottom view (b) of a spacer.

以下、本発明の蒸気発生装置の一実施形態を図面を参照して説明する。この実施形態の蒸気発生装置１０は、スチームコンベクションオーブン等の加熱調理器に用いられ、加熱調理機器の調理庫内に蒸気を供給するものである。図１及び図２に示したように、蒸気発生装置１０は、所定量の水を貯えて蒸気を発生させる筒形（略円筒形）の蒸気発生容器１１と、蒸気発生容器１１の外周に巻回した誘導加熱コイル２０と、蒸気発生容器１１内に収容されて誘導加熱コイル２０に高周波電流を供給することで発熱して蒸気発生容器１１内の水を加熱する加熱体３０とを備えている。 Hereinafter, an embodiment of a steam generator according to the present invention will be described with reference to the drawings. The steam generator 10 of this embodiment is used in a cooking device such as a steam convection oven, and supplies steam into a cooking chamber of a cooking device. As shown in FIGS. 1 and 2, the steam generator 10 includes a cylindrical (substantially cylindrical) steam generating container 11 that stores a predetermined amount of water and generates steam, and is wound around the outer periphery of the steam generating container 11. A rotating induction heating coil 20 and a heating body 30 housed in the steam generation container 11 and generating heat by supplying a high frequency current to the induction heating coil 20 to heat water in the steam generation container 11 are provided. .

図１及び図２に示したように、蒸気発生容器１１は上下が開口した筒形形状をしており、上側部１２と下側部１３とから構成されている。蒸気発生容器１１の上端の開口１１ａは蒸気の噴き出し口となっており、蒸気発生容器１１の下端の開口は排水口となっている。蒸気発生容器１１の上部には調理庫内に蒸気を送り出す蒸気導出筒１４が着脱可能に取り付けられており、蒸気導出筒１４の上部にて水平方向に延出させた接続筒部１４ａが調理庫内に接続されている。蒸気発生容器１１の下部には排水筒部（図示省略）が接続され、蒸気発生容器１１内の水は排水筒部に設けた排水バルブを開放することによって排水される。 As shown in FIGS. 1 and 2, the steam generation container 11 has a cylindrical shape with upper and lower openings, and includes an upper part 12 and a lower part 13. The opening 11a at the upper end of the steam generating container 11 serves as a steam outlet, and the opening at the lower end of the steam generating container 11 serves as a drain outlet. A steam outlet tube 14 for sending steam into the cooking chamber is detachably attached to the upper portion of the steam generating container 11, and a connecting tube portion 14 a extending horizontally in the upper portion of the steam outlet tube 14 is a cooking chamber. Connected in. A drain cylinder (not shown) is connected to the lower part of the steam generation container 11, and water in the steam generation container 11 is drained by opening a drain valve provided in the drain cylinder.

図２に示したように、蒸気発生容器１１（の上側部１２）の周面上部には貫通孔１２ａが形成されており、貫通孔１２ａには加熱体３０の過熱状態を検知するための温度センサ３３が蒸気発生容器１１の外側から内部に挿入可能となっている。図２及び図３に示したように、蒸気発生容器１１（の上側部１２）の内周面上部には上下方向に延びる６つの係合溝部１２ｂが形成されており、これら係合溝部１２ｂは後述する加熱体３０のホルダ３１の外周部の突部３１ａが係合可能となっている。図３及び図４に示したように、６つの係合溝部１２ｂは蒸気発生容器１１の周方向に沿って等間隔に配置され、各係合溝部１２ｂは蒸気発生容器１１の（の上側部１２）の内周面上部にて上側が開いた状態で外側に凹むように上下方向に延びている。６つの係合溝部１２ｂのうちの図３に示す右側に配置された２つ（一部）の係合溝部１２Ａｂは蒸気発生容器１１の周方向の幅が他の係合溝部１２ｂよりも長くなっており、これら２つの係合溝部１２Ａｂは加熱体３０の蒸気発生容器１１に対する周方向の位置を決める位置決め用係合溝部１２Ａｂとなっている。また、図３に示す左側に配置された２つの係合溝部１２ｂの間の部分１２ｃは図４に示したように他の部分より高くなっている。 As shown in FIG. 2, a through hole 12 a is formed in the upper peripheral surface of the steam generation container 11 (upper portion 12 thereof), and a temperature for detecting an overheated state of the heating body 30 is formed in the through hole 12 a. The sensor 33 can be inserted into the steam generating container 11 from the outside. As shown in FIGS. 2 and 3, six engaging groove portions 12 b extending in the vertical direction are formed in the upper portion of the inner peripheral surface of the steam generation container 11 (the upper portion 12 thereof). The protrusion 31a of the outer peripheral part of the holder 31 of the heating body 30 mentioned later can be engaged. As shown in FIGS. 3 and 4, the six engaging groove portions 12 b are arranged at equal intervals along the circumferential direction of the steam generating container 11, and each engaging groove portion 12 b is an upper side portion 12 of the steam generating container 11. ) Extending in the vertical direction so as to be recessed outward with the upper side opened at the upper part of the inner peripheral surface. Of the six engaging groove portions 12b, two (partial) engaging groove portions 12Ab arranged on the right side shown in FIG. 3 have the circumferential width of the steam generating container 11 longer than the other engaging groove portions 12b. These two engaging groove portions 12Ab are positioning engaging groove portions 12Ab that determine the circumferential position of the heating body 30 with respect to the steam generating container 11. Further, the portion 12c between the two engaging groove portions 12b arranged on the left side shown in FIG. 3 is higher than the other portions as shown in FIG.

図１に示したように、蒸気発生容器１１の隣接する位置には水位検知タンク１５が立設しており、水位検知タンク１５の下部は蒸気発生容器１１の下部に連通接続されている。水位検知タンク１５内にはフロートスイッチよりなる水位センサ１６が設けられており、水位センサ１６は水位検知タンク１５内の水位を検出することで蒸気発生容器１１内の水位を検知している。水位検知タンク１５には給水管（図示省略）が接続されており、給水管には給水弁（図示省略）が介装されている。給水管から送出される水は給水弁の開放によって水位検知タンク１５に供給され、水位検知タンク１５に供給された水は水位検知タンク１５内の水位と同じ水位となるように蒸気発生容器１１に流入する。 As shown in FIG. 1, a water level detection tank 15 is erected at a position adjacent to the steam generation container 11, and a lower part of the water level detection tank 15 is connected to a lower part of the steam generation container 11. A water level sensor 16 comprising a float switch is provided in the water level detection tank 15, and the water level sensor 16 detects the water level in the water level detection tank 15 to detect the water level in the steam generation container 11. A water supply pipe (not shown) is connected to the water level detection tank 15, and a water supply valve (not shown) is interposed in the water supply pipe. The water sent from the water supply pipe is supplied to the water level detection tank 15 by opening the water supply valve, and the water supplied to the water level detection tank 15 is supplied to the steam generation container 11 so that the water level is the same as the water level in the water level detection tank 15. Inflow.

図１及び図２に示したように、蒸気発生容器１１の外周には上下方向の中間部から下部に誘導加熱コイル２０が巻回されている。誘導加熱コイル２０に高周波電流を供給することによって、蒸気発生容器１１内の加熱体３０の周囲に磁界を発生させ、この磁界により加熱体３０に渦電流が流れるときの電気抵抗によって発生するジュール熱によって蒸気発生容器１１内の水を加熱している。 As shown in FIGS. 1 and 2, an induction heating coil 20 is wound around the outer periphery of the steam generation container 11 from the middle part in the vertical direction to the lower part. By supplying a high frequency current to the induction heating coil 20, a magnetic field is generated around the heating body 30 in the steam generation container 11, and Joule heat generated by electric resistance when an eddy current flows through the heating body 30 by this magnetic field. Thus, the water in the steam generation container 11 is heated.

図２に示したように、蒸気発生容器１１内には加熱体３０が収容されており、加熱体３０は誘導加熱コイル２０に高周波電流を供給したときに発生する磁界の影響によって渦電流が流れるときの電気抵抗により発生するジュール熱によって蒸気発生容器１１内の水を加熱するものである。図２、図３及び図５に示したように、加熱体３０は、蒸気発生容器１１の上部に支持されたホルダ３１と、ホルダ３１に上端部が固定されて蒸気発生容器１１内に吊設された１２本（複数）の加熱棒３２とを備えている。ホルダ３１は略環状平板形をしており、ホルダ３１の外周部には外側に突出する６つ（複数）の突部３１ａが蒸気発生容器１１の係合溝部１２ｂと同様に周方向に沿って等間隔に形成されている。ホルダ３１の６つの突部３１ａは蒸気発生容器１１の上部の６つの係合溝部１２ｂに着脱可能に係合しており、ホルダ３１の突部３１ａが係合溝部１２ｂの底部に係止して蒸気発生容器１１の上部に支持されている。６つの突部３１ａのうちの図３に示す右側に配置された２つ（一部）の突部３１Ａａは、蒸気発生容器１１の位置決め用係合溝部１２Ａｂと同様に、加熱体３０の周方向の幅が他の突部３１ａよりも長くなっている。これら２つの突部３１Ａａは、蒸気発生容器１１の位置決め用係合溝部１２Ａｂにのみ係合可能となっており、加熱体３０の蒸気発生容器１１に対する周方向の位置を決める位置決め用突部３１Ａａとなっている。 As shown in FIG. 2, a heating body 30 is accommodated in the steam generation container 11, and an eddy current flows through the heating body 30 due to the influence of a magnetic field generated when a high frequency current is supplied to the induction heating coil 20. The water in the steam generation container 11 is heated by Joule heat generated by electrical resistance. As shown in FIGS. 2, 3, and 5, the heating body 30 includes a holder 31 supported on the upper part of the steam generation container 11, and an upper end fixed to the holder 31 so as to be suspended in the steam generation container 11. 12 (plural) heating rods 32 are provided. The holder 31 has a substantially annular flat plate shape, and six (a plurality of) projecting portions 31 a projecting outward are provided on the outer peripheral portion of the holder 31 along the circumferential direction in the same manner as the engaging groove portion 12 b of the steam generating container 11. It is formed at equal intervals. The six protrusions 31a of the holder 31 are detachably engaged with the six engagement grooves 12b at the top of the steam generating container 11, and the protrusions 31a of the holder 31 are engaged with the bottom of the engagement groove 12b. It is supported on the upper part of the steam generation container 11. Of the six protrusions 31a, two (partial) protrusions 31Aa arranged on the right side shown in FIG. 3 are arranged in the circumferential direction of the heating body 30 in the same manner as the positioning engagement groove 12Ab of the steam generation container 11. Is longer than the other protrusions 31a. These two protrusions 31Aa can be engaged only with the positioning engagement groove 12Ab of the steam generating container 11, and positioning protrusions 31Aa for determining the circumferential position of the heating body 30 with respect to the steam generating container 11 and It has become.

図３及び図５に示したように、ホルダ３１には周方向に沿って等間隔に１２本の加熱棒３２の上端部が固定されている。加熱棒３２は蒸気発生容器１１の軸線方向に延び、蒸気発生容器１１の中心軸を中心とした同心円上に等間隔に配置されている。加熱棒３２は導電性の金属製棒状部材であり、蒸気発生容器１１の外周に巻回された誘導加熱コイル２０と同じ高さ位置でこれに高周波電流を供給したときに発熱する発熱部３２ａと、この発熱部３２ａより高い位置にて発熱しない非発熱部３２ｂとを有している。加熱棒３２はこの発熱しない非発熱部３２ｂがホルダ３１に固定されている。 As shown in FIGS. 3 and 5, the upper ends of the twelve heating rods 32 are fixed to the holder 31 at equal intervals along the circumferential direction. The heating rods 32 extend in the axial direction of the steam generation container 11 and are arranged at equal intervals on a concentric circle centered on the central axis of the steam generation container 11. The heating rod 32 is a conductive metal rod-like member, and a heating portion 32a that generates heat when a high frequency current is supplied to the induction heating coil 20 wound around the outer periphery of the steam generation vessel 11 at the same height position. And a non-heat generating portion 32b that does not generate heat at a position higher than the heat generating portion 32a. The heating rod 32 is fixed to the holder 31 with a non-heating portion 32 b that does not generate heat.

図２及び図４に示したように、１２本（複数）の加熱棒３２のうちの１本の加熱棒３２Ａの非発熱部３２Ａｂには径方向に挿通孔３２Ａｃが形成されており、図３及び図５に示したように、非発熱部３２Ａｂに挿通孔３２Ａｃが形成された加熱棒３２Ａはホルダ３１の突部３１ａが形成されていない周方向の位置に固定されている。加熱棒３２Ａの挿通孔３２Ａｃは蒸気発生容器１１の貫通孔１２ａと対向する位置に形成されており、挿通孔３２Ａｃには蒸気発生容器１１の貫通孔１２ａに外側から挿入した温度センサ３３が嵌挿されている。温度センサ３３はこの実施形態ではワイヤ状（線状であり、ある程度の変形可能な棒状でもある）の感温部３３ａを有したサーミスタであり、感温部３３ａが挿通孔３２Ａｃに嵌挿されている。温度センサ３３は加熱棒３２Ａの非発熱部３２Ａｂの検出温度に基づいて、加熱体３０の過熱状態（例えば、蒸気発生容器１１内に所定量の水が貯えられてない状態で加熱体３０が発熱するいわゆる空焚きの状態）を検知するものである。 As shown in FIGS. 2 and 4, an insertion hole 32Ac is formed in the radial direction in the non-heat generating portion 32Ab of one heating rod 32A among the twelve (plural) heating rods 32, and FIG. As shown in FIG. 5, the heating rod 32 A in which the insertion hole 32 Ac is formed in the non-heating portion 32 Ab is fixed at a circumferential position where the protrusion 31 a of the holder 31 is not formed. The insertion hole 32Ac of the heating rod 32A is formed at a position facing the through hole 12a of the steam generating container 11, and the temperature sensor 33 inserted from the outside into the through hole 12a of the steam generating container 11 is inserted into the insertion hole 32Ac. Has been. In this embodiment, the temperature sensor 33 is a thermistor having a wire-like (linear and also deformable rod-like) temperature sensing portion 33a, and the temperature sensing portion 33a is inserted into the insertion hole 32Ac. Yes. Based on the temperature detected by the non-heat generating portion 32Ab of the heating rod 32A, the temperature sensor 33 generates heat when the heating body 30 is overheated (for example, when a predetermined amount of water is not stored in the steam generation container 11). The so-called empty state).

図２に示したように、蒸気発生容器１１の上部には加熱体３０の上側に筒形のスペーサ４０が嵌合して設けられている。スペーサ４０は加熱体３０が蒸気発生容器１１内にて上下方向にずれるのを防ぐためのものである。図６に示したように、スペーサ４０の下部には下側に突出する６つの突起部４１が形成されており、これら突起部４１は蒸気発生容器１１の係合溝部１２ｂと同様に周方向に沿って等間隔に形成されている。６つの突起部４１のうちの図６（ｂ）に示す右側に配置された２つの突起部４１Ａは蒸気発生容器１１の位置決め用係合溝部１２Ａｂと同様に、スペーサ４０の周方向の幅が他の突起部４１よりも長くなって。また、図６（ａ）に示す左側に配置されたスペーサ４０の突起部４１の間の部分４２は、図３にて示した蒸気発生容器１１の上部内周面の２つの縦溝の間の部分１２ｃに係合可能となるように、他の部分より高くなっている。 As shown in FIG. 2, a cylindrical spacer 40 is fitted to the upper part of the steam generating container 11 on the upper side of the heating body 30. The spacer 40 is for preventing the heating body 30 from shifting vertically in the steam generation container 11. As shown in FIG. 6, six projections 41 projecting downward are formed in the lower part of the spacer 40, and these projections 41 are arranged in the circumferential direction in the same manner as the engagement groove 12 b of the steam generating container 11. It is formed at equal intervals along. Of the six protrusions 41, the two protrusions 41 A arranged on the right side shown in FIG. 6B have other circumferential widths of the spacer 40 like the positioning engagement grooves 12 Ab of the steam generation container 11. It is longer than the protrusion 41. Moreover, the part 42 between the protrusion parts 41 of the spacer 40 arrange | positioned at the left side shown to Fig.6 (a) is between two vertical grooves of the upper internal peripheral surface of the steam generation container 11 shown in FIG. It is higher than the other parts so that it can engage with the part 12c.

上記のように構成した蒸気発生装置１０の作動について説明する。加熱調理器の調理庫内に蒸気を含んだ熱風を対流させるときに、蒸気発生装置１０を制御装置（図示省略）の制御に基づいて作動させる。蒸気発生装置１０を作動させたときには、給水管から送出される水が給水弁の開放によって水位検知タンク１５に供給され、水位検知タンク１５内に供給された水は蒸気発生容器１１に流入する。水位検知タンク１５内の水位センサ１６による検出水位に基づいて、蒸気発生容器１１内には所定の水位となるように水が供給されている。具体的には、蒸気発生容器１１内の水位は水位センサ１６の検出水位に基づいて加熱体３０の加熱棒３２の発熱部３２ａを少し超える位置まで供給されるように制御されている。 The operation of the steam generator 10 configured as described above will be described. When the hot air containing steam is convected in the cooking chamber of the heating cooker, the steam generator 10 is operated based on control of a control device (not shown). When the steam generator 10 is operated, water sent from the water supply pipe is supplied to the water level detection tank 15 by opening the water supply valve, and the water supplied into the water level detection tank 15 flows into the steam generation container 11. Based on the water level detected by the water level sensor 16 in the water level detection tank 15, water is supplied into the steam generation container 11 so as to reach a predetermined water level. Specifically, the water level in the steam generation container 11 is controlled so as to be supplied to a position slightly exceeding the heat generating portion 32 a of the heating rod 32 of the heating body 30 based on the detected water level of the water level sensor 16.

このように蒸気発生容器１１内の加熱棒３２の発熱部３２ａが水中に浸漬された状態で誘導加熱コイル２０に高周波電流を供給して、加熱棒３２の発熱部３２ａに流れる渦電流により生じる電気抵抗のジュール熱を発生させると、蒸気発生容器１１内の水は加熱されて蒸気となる。蒸気発生容器１１内で発生した蒸気は上端の開口１１ａから噴き出し、蒸気導出筒１４によって調理庫内に導かれる。 In this way, high-frequency current is supplied to the induction heating coil 20 in a state where the heat generating portion 32a of the heating rod 32 in the steam generating container 11 is immersed in water, and electricity generated by eddy current flowing in the heat generating portion 32a of the heating rod 32 is generated. When the Joule heat of resistance is generated, the water in the steam generation container 11 is heated to become steam. The steam generated in the steam generation container 11 is ejected from the opening 11a at the upper end and is guided into the cooking chamber by the steam outlet tube 14.

蒸気発生容器１１内の水位が上述した所定の水位となっているときには、加熱棒３２の発熱部３２ａは水中に浸漬された状態であり、加熱棒３２の発熱部３２ａの熱が蒸気発生容器１１内の水と熱交換されるため、温度センサ３３により検出される非発熱部３２ｂの温度は蒸気とほぼ同じ１００℃となっている。蒸気発生容器１１内の水位が水位センサの故障等によって加熱棒３２の発熱部３２ａより下側の水位となると、加熱棒３２の発熱部３２ａの熱が蒸気発生容器１１内の水と熱交換されなくなって非発熱部３２ｂに伝導され、温度センサ３３により検出される非発熱部３２ｂの温度は１００℃以上に上昇する。温度センサ３３により検出される温度が所定温度として例えば１１０℃以上を検出すると、制御装置は加熱体３０が過熱状態であると検知して誘導加熱コイル２０に高周波電流の供給を停止させる。これにより、加熱体３０が過熱状態となることに起因した故障を防ぐことができる。 When the water level in the steam generating container 11 is the above-mentioned predetermined water level, the heat generating portion 32a of the heating rod 32 is immersed in water, and the heat of the heat generating portion 32a of the heating rod 32 is heated by the steam generating container 11. Since heat is exchanged with the water inside, the temperature of the non-heating part 32b detected by the temperature sensor 33 is about 100 ° C., which is substantially the same as that of steam. When the water level in the steam generating container 11 becomes a lower water level than the heat generating part 32a of the heating rod 32 due to a failure of the water level sensor or the like, the heat of the heat generating part 32a of the heating rod 32 is heat exchanged with the water in the steam generating container 11. The temperature of the non-heat generating part 32b detected by the temperature sensor 33 rises to 100 ° C. or higher. When the temperature detected by the temperature sensor 33 is, for example, 110 ° C. or more as a predetermined temperature, the control device detects that the heating body 30 is in an overheated state and stops the induction heating coil 20 from supplying high-frequency current. Thereby, the malfunction resulting from the heating body 30 becoming an overheated state can be prevented.

上記のように構成した蒸気発生装置１０においては、蒸気発生容器１１内に収容された加熱体３０は、蒸気発生容器１１の上部に支持されたホルダ３１と、このホルダ３１に上端部が固定されて蒸気発生容器１１内に吊設された１２本（複数）の加熱棒３２とを有している。各加熱棒３２は誘導加熱コイル２０と同じ高さ位置にて発熱する発熱部３２ａと、発熱部３２ａより高い位置にて発熱しない非発熱部３２ｂとを有している。１２本の加熱棒３２のうちの１つの加熱棒３２Ａの非発熱部３２Ａｂには径方向に挿通孔３２Ａｃが形成され、蒸気発生容器１１の周面上部には挿通孔３２Ａｃと対向する位置に貫通孔１２ａが形成されている。蒸気発生装置１０においては、蒸気発生容器１１の貫通孔１２ａに外側から挿入した温度センサ３３を加熱棒３２Ａの非発熱部３２Ａｂの挿通孔３２Ａｃに嵌挿して、温度センサ３３の検出温度に基づいて加熱体３０の過熱状態を検知するようにしている。 In the steam generating apparatus 10 configured as described above, the heating body 30 accommodated in the steam generating container 11 has a holder 31 supported on the upper part of the steam generating container 11 and an upper end fixed to the holder 31. And 12 (plural) heating rods 32 suspended in the steam generation vessel 11. Each heating rod 32 has a heat generating portion 32a that generates heat at the same height as the induction heating coil 20, and a non-heat generating portion 32b that does not generate heat at a position higher than the heat generating portion 32a. An insertion hole 32Ac is formed in the radial direction in the non-heating part 32Ab of one heating rod 32A of the twelve heating rods 32, and penetrates at a position facing the insertion hole 32Ac in the upper peripheral surface of the steam generating container 11. A hole 12a is formed. In the steam generation device 10, the temperature sensor 33 inserted from the outside into the through hole 12 a of the steam generation container 11 is inserted into the insertion hole 32 Ac of the non-heating part 32 Ab of the heating rod 32 A, and based on the detected temperature of the temperature sensor 33. The overheating state of the heating body 30 is detected.

加熱体３０のホルダ３１の外周部には周方向に沿って外側に突出する６つ（複数）の突部３１ａが形成され、６つの突部３１ａを蒸気発生容器１１の内周部に係合させることで加熱体３０を蒸気発生容器１１内に支持させるようにしている。図３に示したように、この蒸気発生装置１０では、ホルダ３１の６つの突部３１ａを蒸気発生容器１１の貫通孔１２ａと加熱棒３２Ａの非発熱部３２Ａｂの挿通孔３２Ａｃとを結ぶ直線上の直上を避けるように配置した。これにより、蒸気発生容器１１の貫通孔１２ａに外側から挿入した温度センサ３３が加熱棒３２Ａの非発熱部３２Ａｂの挿通孔３２Ａｃに嵌挿されていることを蒸気導出筒１４を取り外した状態の蒸気発生容器１１の上側からホルダ３１の突部３１ａによって遮られることなく目視によって確認できるようになった。 Six (a plurality of) protrusions 31 a projecting outward in the circumferential direction are formed on the outer periphery of the holder 31 of the heating body 30, and the six protrusions 31 a are engaged with the inner periphery of the steam generating container 11. By doing so, the heating body 30 is supported in the steam generation container 11. As shown in FIG. 3, in this steam generator 10, the six protrusions 31a of the holder 31 are on a straight line connecting the through hole 12a of the steam generation container 11 and the insertion hole 32Ac of the non-heat generating part 32Ab of the heating rod 32A. Arranged to avoid directly above. Thereby, the steam in a state where the steam outlet tube 14 is removed that the temperature sensor 33 inserted from the outside into the through hole 12a of the steam generating container 11 is fitted into the insertion hole 32Ac of the non-heating part 32Ab of the heating rod 32A. It can be confirmed visually from the upper side of the generating container 11 without being blocked by the protrusion 31a of the holder 31.

また、蒸気発生容器１１の内周面上部には蒸気発生容器１１の貫通孔１２ａが加熱棒３２Ａの挿通孔３２Ａｃと対向する位置にてホルダ３１の６つの突部３１ａに係合する６つの係合溝部１２ｂが形成されており、ホルダ３１の６つの突部３１ａを蒸気発生容器１１の６つの係合溝部１２ｂに係合させている。これにより、ホルダ３１の突部３１ａを蒸気発生容器１１の係合溝部１２ｂに係合させることによって、蒸気発生容器１１の貫通孔１２ａが加熱棒３２Ａの挿通孔３２Ａｃと対向する位置となり、加熱体３０の蒸気発生容器１１の周方向及び上下方向に対する位置決めを容易とすることができた。 In addition, at the upper part of the inner peripheral surface of the steam generation container 11, there are six engagements that engage the six protrusions 31a of the holder 31 at positions where the through holes 12a of the steam generation container 11 face the insertion holes 32Ac of the heating rod 32A. Joint grooves 12 b are formed, and the six protrusions 31 a of the holder 31 are engaged with the six engagement grooves 12 b of the steam generation container 11. Thus, by engaging the protrusion 31a of the holder 31 with the engagement groove 12b of the steam generating container 11, the through hole 12a of the steam generating container 11 is positioned to face the insertion hole 32Ac of the heating rod 32A, and the heating body Positioning with respect to the circumferential direction and the up-down direction of 30 steam generation containers 11 could be facilitated.

また、ホルダ３１の６つの突部３１ａのうちの図３に示す右側の２つ（一部）と、蒸気発生容器１１の６つの係合溝部１２ｂのうちの図３に示す右側の２つ（一部）とを、他の突部３１ａ及び他の係合溝部１２ｂの幅よりも長く（広く）することで、加熱体３０の蒸気発生容器１１に対する周方向の位置決めをするための位置決め用突部３１Ａａと位置決め用係合溝部１２Ａｂとして、蒸気発生容器１１の貫通孔１２ａが加熱棒３２Ａの挿通孔３２Ａｃと対向する位置にて、位置決め用突部３１Ａａが位置決め用係合溝部１２Ａｂにだけ係合するようにした。これにより、蒸気発生容器１１の貫通孔１２ａが加熱棒３２Ａの挿通孔３２Ａｃと対向しない位置（位置決め用突部３１Ａａが位置決め用係合溝部１２Ａｂ以外の他の係合溝部１２ｂと係合する位置）では、ホルダ３１の６つの突部３１ａが蒸気発生容器１１の６つの係合溝部１２ｂに係合するのを防ぐことができた。 Also, two of the six protrusions 31a of the holder 31 on the right side (a part) shown in FIG. 3 and two of the six engagement grooves 12b of the steam generating container 11 on the right side shown in FIG. Positioning part for positioning the heating element 30 in the circumferential direction with respect to the steam generating container 11 by making the part longer) than the width of the other protruding part 31a and the other engaging groove part 12b. As the positioning groove 31Aa and the positioning engagement groove 12Ab, the positioning protrusion 31Aa engages only with the positioning engagement groove 12Ab at a position where the through hole 12a of the steam generating container 11 faces the insertion hole 32Ac of the heating rod 32A. I tried to do it. Thereby, the position where the through hole 12a of the steam generating container 11 does not face the insertion hole 32Ac of the heating rod 32A (the position where the positioning protrusion 31Aa engages with the other engaging groove 12b other than the positioning engaging groove 12Ab). Then, it was possible to prevent the six protrusions 31 a of the holder 31 from engaging with the six engagement grooves 12 b of the steam generation container 11.

また、蒸気発生容器１１の上部には加熱体３０の上側にて蒸気発生容器１１の内周面上部に嵌合する筒形のスペーサ４０が設けられている。スペーサ４０の下部にはホルダ３１の突部３１ａの上側にて蒸気発生容器１１の係合溝部１２ｂに係合する６つの突起部４１が形成されている。これにより、ホルダ３１の突部３１ａがスペーサ４０の突起部４１によって係合溝部１２ｂの底部に押し込まれた状態で係合されるようになり、加熱体３０の上下方向の位置がずれるのを防ぐことができた。また、ホルダ３１の突部３１ａがスペーサ４０の突起部４１によって上方に移動するのを規制されるようになったので、蒸気発生装置１０の輸送をするときに、加熱体３０が蒸気発生容器１１の内部で上下に動くのを防ぐことができた。さらに、ホルダ３１の突部３１ａが蒸気発生容器１１の係合溝部１２ｂの間の部分に引っ掛かった状態でスペーサ４０を蒸気発生容器１１の内周面上部に嵌合させたときには、スペーサ４０が正常時より高い位置で蒸気発生容器１１の上部に嵌合することになり、スペーサ４０の上下方向の位置を確認することで、ホルダ３１の突部３１ａが蒸気発生容器１１の係合溝部１２ｂの底部に係合しているか否かを確認することができるようになった。 In addition, a cylindrical spacer 40 that is fitted to the upper part of the inner peripheral surface of the steam generating container 11 is provided on the upper side of the steam generating container 11 above the heating body 30. Six protrusions 41 that engage with the engagement grooves 12 b of the steam generation container 11 are formed on the lower portion of the spacer 40 above the protrusions 31 a of the holder 31. As a result, the protrusion 31a of the holder 31 is engaged with the protrusion 41 of the spacer 40 while being pushed into the bottom of the engagement groove 12b, and the vertical position of the heating body 30 is prevented from shifting. I was able to. Further, since the protrusion 31 a of the holder 31 is restricted from moving upward by the protrusion 41 of the spacer 40, when the steam generator 10 is transported, the heating body 30 is moved to the steam generation container 11. It was possible to prevent it from moving up and down inside. Furthermore, when the spacer 40 is fitted to the upper part of the inner peripheral surface of the steam generation container 11 with the protrusion 31a of the holder 31 hooked on the portion between the engagement grooves 12b of the steam generation container 11, the spacer 40 is normal. The upper end of the steam generating container 11 is fitted at a position higher than the time, and the vertical position of the spacer 40 is confirmed so that the protrusion 31a of the holder 31 is the bottom of the engaging groove 12b of the steam generating container 11. It is now possible to confirm whether or not it is engaged.

上記のように構成した蒸気発生装置１０においては、加熱体３０は１２本（複数）の加熱棒３２を備えているが、本発明はこれに限られるものでなく、加熱棒３２を１２本より少なく、または１２本より多くしたものであってもよく、このようにしたときにも上述したのと同様の作用効果を得ることができる。 In the steam generator 10 configured as described above, the heating body 30 includes twelve (plural) heating rods 32. However, the present invention is not limited to this, and the heating rods 32 are more than twelve. There may be fewer or more than twelve, and when this is done, the same effects as described above can be obtained.

上記のように構成した蒸気発生装置１０においては、加熱体３０のホルダ３１には６つの突部３１ａが形成され、蒸気発生容器１１の上部内周面に６つの係合溝部１２ｂを形成したが、本発明はこれに限られるものでなく、ホルダ３１の突部３１ａを２つ以上とするとともに、蒸気発生容器１１の係合溝部１２ｂをホルダ３１の突部３１ａに応じた数としてもよく、このようにしたときにも上述したのと同様の作用効果を得ることができる。 In the steam generator 10 configured as described above, the holder 31 of the heating body 30 is formed with six protrusions 31 a and the steam generator vessel 11 is formed with six engaging grooves 12 b on the upper inner peripheral surface. The present invention is not limited to this, and the number of the protrusions 31a of the holder 31 may be two or more, and the number of the engagement grooves 12b of the steam generating container 11 may be set according to the number of protrusions 31a of the holder 31, Even in this case, the same effects as described above can be obtained.

１０…蒸気発生装置、１１…蒸気発生容器、１２ａ…貫通孔、１２ｂ…係合溝部、１２Ａｂ…位置決め用係合溝部、２０…誘導加熱コイル、３０…加熱体、３１…ホルダ、３１ａ…突部、３１Ａａ…位置決め用突部、３２，３２Ａ…加熱棒、３２ａ…発熱部、３２ｂ，３２Ａｂ…非発熱部、３２Ａｃ…挿通孔、４０…スペーサ、４１…突起部。 DESCRIPTION OF SYMBOLS 10 ... Steam generating apparatus, 11 ... Steam generating container, 12a ... Through-hole, 12b ... Engaging groove part, 12Ab ... Engaging groove part for positioning, 20 ... Induction heating coil, 30 ... Heating body, 31 ... Holder, 31a ... Projection part , 31Aa: positioning protrusions, 32, 32A ... heating rod, 32a ... heating part, 32b, 32Ab ... non-heating part, 32Ac ... insertion hole, 40 ... spacer, 41 ... projection part.

Claims

A cylindrical steam generating container for storing a predetermined amount of water and generating steam;
An induction heating coil wound around the outer periphery of the steam generating container;
A heating element housed in the steam generation vessel and generating heat by supplying a high-frequency current to the induction heating coil to heat the water in the steam generation vessel;
The heating body has a holder supported on the upper part of the steam generation container, and a plurality of heating rods having upper ends fixed to the holder and suspended in the steam generation container,
The heating rod has a heating part that generates heat at the same height as the induction heating coil, and a non-heating part that does not generate heat at a position higher than the heating part,
A non-heat generating portion of one of the plurality of heating rods is formed with an insertion hole in a radial direction, and a through hole is formed at a position facing the insertion hole in the upper peripheral surface of the steam generating container. A temperature sensor inserted from the outside into the through hole of the steam generating container is inserted into the insertion hole of the non-heat generating portion of the heating rod, and the overheating state of the heating body is detected based on the temperature detected by the temperature sensor. A steam generator,
A plurality of protrusions projecting outward along the circumferential direction are formed on the outer peripheral portion of the holder, and the heating body is moved to the steam by engaging the plurality of protrusions with the inner peripheral portion of the steam generating container. So that it is supported in the generation vessel,
The steam generator according to claim 1, wherein the plurality of protrusions of the holder are arranged so as to avoid a position directly above a straight line connecting the through hole of the steam generating container and the insertion hole of the non-heat generating part of the heating rod.

The steam generator according to claim 1,
A plurality of engaging groove portions extending in the vertical direction are formed in the upper part of the inner peripheral surface of the steam generating container so that the plurality of protrusions of the holder engage with each other at a position where the through hole faces the insertion hole. A plurality of protrusions are engaged with a plurality of engagement grooves of the steam generation container.

The steam generator according to claim 2,
Positioning protrusions for positioning a part of the plurality of protrusions of the holder and a part of the plurality of engaging grooves of the steam generation container in the circumferential direction of the heating body with respect to the steam generation container As an engaging groove,
The steam generating device characterized in that the positioning protrusion engages with the positioning engaging groove only when the through hole of the steam generating container is disposed at a position facing the insertion hole of the heating rod. .

The steam generator according to claim 2 or 3,
Provided on the upper part of the steam generating container is a cylindrical spacer that fits to the upper part of the inner peripheral surface of the steam generating container above the heating body,
The steam generator according to claim 1, wherein a plurality of protrusions that engage with the engaging groove are formed on the lower side of the spacer above the protrusion.