JP3706928B2

JP3706928B2 - Canned beverage induction heating device

Info

Publication number: JP3706928B2
Application number: JP17641598A
Authority: JP
Inventors: 寿久古田; 孝史石田; 幸雄木村; 研吾貝沼; 嘉則宮腰; 隆宣角垣
Original assignee: Fuji Electric Retail Systems Co Ltd
Current assignee: Fuji Electric Retail Systems Co Ltd
Priority date: 1998-06-23
Filing date: 1998-06-23
Publication date: 2005-10-19
Anticipated expiration: 2018-06-23
Also published as: JP2000011247A

Description

【０００１】
【発明の属する技術分野】
本発明は、缶飲料を電磁誘導加熱して販売する自動販売機の誘導加熱装置に関する。
【０００２】
【従来の技術】
従来、この種の誘導加熱装置として、本出願人による特願平０９−１１７６７２号がある。この装置は回転機構を備えて、加熱中または加熱後に缶を一定の回転速度で回転させて、缶の中身飲料を撹拌することにより中身飲料の温度を均一にしている。また、温度センサを備えて、加熱中に加熱を一旦停止させ缶表面温度が安定してから表面温度を測定し、缶中身飲料温度として、加熱を継続するか否かの判断をする。また、この装置以外にも、回転機構で缶を一定角度傾斜させてから、一定の回転速度で回転させて撹拌するものもある。
【０００３】
【発明が解決しようとする課題】
しかしながら、これら従来装置では、次のような問題がある。
（1）缶中身飲料の撹拌効果が小さいため、缶表面に生じた熱を中身飲料に伝達する効率が低く、缶表面温度が局部的に高い状態になり、缶が焦げるという問題があった。
（2）温度センサを備え、その測定温度により加熱コイルを駆動するインバータのオン・オフを制御する装置では、所定時間加熱した後に、中身飲料を撹拌しているため、撹拌効果が小さいと缶表面温度と中身飲料温度がなじむまでに時間を要し、加熱時間（販売時間）が長くなるという問題がある。
（3）同じく温度センサを備え、その測定した缶表面温度により中身飲料温度を予測する場合には、加熱を一旦停止させ、缶表面温度が安定してから缶表面温度を測定しているため、缶表面温度と中身飲料温度がなじむまでに時間を要し、加熱時間（販売時間）が長くなるという問題がある。
【０００４】
【課題を解決するための手段】
そこで上記課題を解決するために、請求項１の発明は、飲料入りの缶を電磁誘導加熱を利用して加熱する缶飲料の誘導加熱装置において、缶加熱時に缶を水平姿勢に保持した状態で回転させ、缶加熱後、所定時間継続して回転させる手段を備えたことを特徴とする。
【０００５】
請求項２の発明は、飲料入りの缶の周囲に電磁誘導加熱コイルを配置しこのコイルにインバータから電力を間欠的に供給するとともに、缶の表面温度を測定する温度センサを設けておき前記インバータからの通電を停止した後の一定時間経過ごとに温度センサの測定温度と予め記憶されている目標温度とを比較し、測定温度が目標温度に達した場合にインバータの運転を停止する缶飲料の誘導加熱装置において、缶加熱後に缶を水平姿勢に保持した状態で回転させる手段を備えたことを特徴とする。
【０００６】
請求項３の発明は、飲料入りの缶の周囲に電磁誘導加熱コイルを配置しこのコイルにインバータから電力を間欠的に供給するとともに、缶の表面温度を測定する温度センサを設けておき前記インバータから所定時間通電した後に温度センサの測定温度より求めた温度上昇値と前記インバータの通電時間とから加熱能力を求め、この加熱能力に基づいて缶飲料を予め記憶されている目標温度まで加熱するのに必要な運転時間を予測してその予測時間を経過した後に前記インバータの運転を停止する缶飲料の誘導加熱装置において、缶加熱後に缶を水平姿勢に保持した状態で回転させる手段を備えたことを特徴とする。
【０００７】
請求項４の発明は、請求項１，２または３の発明において、缶を回転させる際に回転速度を増減変動させる手段を備えたことを特徴とする。
【０００８】
請求項５の発明は、請求項１，２，３または４の発明において、缶を回転させるとともに回転方向を繰り返し反転させる手段を備えたことを特徴とする。
【０００９】
請求項６の発明は、請求項１，２，３，４または５の発明において、缶を回転させるとともに缶を回転軸方向に往復動させる手段を備えたことを特徴とする。
【００１０】
請求項７の発明は、飲料入りの缶を電磁誘導加熱を利用して加熱する缶飲料の誘導加熱装置において、缶の表面温度を測定する温度センサと、この温度センサの測定値の時間変化から加熱中の温度上昇値を算出する手段と、算出された温度上昇値にもとづいて中身飲料の温度を推定する手段と、温度センサの検出温度が予め記憶されている缶表面の加熱限界温度に達したか否かを判別する手段と、限界温度に達した場合にそれまでの温度上昇値とその時点で推定されている中身飲料温度と予め記憶されている目標温度とにより加熱時間を算出する手段と、算出された加熱時間を経過した後に加熱を停止する手段とを備えたことを特徴とする。
【００１２】
【発明の実施の形態】
以下、図に沿って本発明の実施形態を説明する。
図１は実施形態の外観図であり、図２は図１の要部を取り出して示した斜視図であり、図３は図１の横断面図である。図において、５０は缶であり、内部に中身飲料５が充填されている。この缶５０が、同レベルに平行かつ水平に支持された１対のローラ２，２の上に載置され、その缶５０の上部がローラ２，２と平行なローラ３により押圧されることで、缶５０が全体では３点支持される。ローラ２はモータ４に接続されて、回転駆動されることにより、缶５０は水平姿勢のままで回転する。
【００１３】
さらに、ローラ２は図２に示されるように、その表面に螺旋状の突起または溝２ａが形成されていることで、回転しながら缶５０を軸方向に移動させることができる。また、ローラ２の下方で缶５０の下部を囲むように加熱コイル１が配置されている。この加熱コイル１は図３に示されるように、フェライト８により支持されるとともに、インバータ６に接続されている。
【００１４】
さらに、缶５０の上方には、温度センサ７が配設されており、缶５０の表面温度を測定する。
これらの構成では、インバータ６により加熱コイル１を駆動させる動作と、モータ４によりローラ２を回転させる動作があり、動作のタイミングとしては加熱と回転を同時に開始し同時に終了する場合と、加熱と回転を同時に開始し加熱終了後も一定時間回転を継続させる場合がある。
【００１５】
図４は加熱と回転を同時に実行する場合のタイミングチャートである。ここでは、インバータ６の出力がオンのとき、モータ４の回転数（回転速度）を高速のＲ４と低速のＲ５の間を直線的に繰り返し変化させるものであり、缶５０は回転数が変化することで加速と減速が繰り返されるとともに、往復駆動されることで中身飲料５は効率よく撹拌される。
【００１６】
図５は同じく、加熱と回転を同時に実行する場合のタイミングチャートである。ここでは、インバータ６の出力がオンのとき、モータ４の回転数を正転方向のＲ６から逆転方向のＲ６までの間を直線的に繰り返し変化させるものである。すなわち、缶５０は交互に正転と逆転を繰り返されるとともに、往復駆動されることで中身飲料５は効率よく撹拌される。
【００１７】
図６は加熱終了後も回転を継続する場合のタイミングチャートである。ここでは、インバータ６の出力がオンのときはモータ４を回転数Ｒ１で回転させておき、インバータ６の出力がオフになると、一定時間、モータ４の回転数を高速のＲ１と低速のＲ２の間を直線的に繰り返し変化させたものである。ここでも、缶５０は回転数が変化することで加速と減速が繰り返されるとともに、往復駆動されることで中身飲料５は効率よく撹拌される。
【００１８】
図７は同じく、加熱終了後も回転を継続する場合のタイミングチャートである。ここでは、インバータ６の出力がオンのときはモータ４を正転方向に回転数Ｒ３で回転させておき、インバータ６の出力がオフになると、一定時間、モータ４の回転数を、正転方向のＲ３から逆転方向の−Ｒ３までの間を直線的に繰り返し変化させたものである。ここでも、缶５０は交互に正転と逆転を繰り返されるとともに、往復駆動されることで中身飲料５は効率よく撹拌される。
【００１９】
次に、温度センサ７の測定温度にもとづいて、加熱時間を制御する場合について説明する。
図８は、インバータ６の運転状態と缶５０の表面温度と中身飲料５の温度との関係を示す図であり、表面温度の上昇度と中身飲料５の温度上昇度はほぼ等しく、おおよそ右上がりの直線になる。
インバータ６への通電開始後、 t ₀ 秒経過した時から t ₁ 秒間隔で缶表面の温度をサンプリングし、サンプリング毎に表面温度の上昇度を求める。サンプリングを開始してから n ＊ t ₁ 秒経過した時の温度上昇度 a _n は次式により近似的に表される。
【００２０】
【数１】

【００２１】
ここで n は１以上の整数であり、特に n ＝ 1 の場合は、数式１は次式のようになる。
【００２２】
【数２】

【００２３】
こうして求められた温度上昇度 a _n を用いることで中身飲料の温度Ｔ _d を求めることができる。すなわち、加熱前の缶表面温度をＴ _s とすると、温度Ｔ _d 次式のようになる。
【００２４】
【数３】

【００２５】
こうして求められた中身飲料の温度Ｔ _d が、予め記憶しておいた目標温度Ｔ _a と比較し、Ｔ _d ≧Ｔ _a となった時点でインバータ６への通電を停止する。
また、上述したサンプリングの間隔 t ₁ を１秒とすると、数式１、２は次式のようになる。
【００２６】
【数４】

【００２７】
【数５】

【００２８】
ところで、上述した制御では、缶５０の表面温度の上昇度と中身飲料５の温度上昇度が等しい場合に成立するが、缶５０の材質や目標とする加熱温度によっては、加熱中に缶表面温度が上昇してある温度（限界値）を越えると、それ以降の表面温度の上昇度と中身飲料５の温度上昇度は同じにならない特性がある。つまり、表面温度が限界値以上の場合、中身飲料５の温度上昇度は、限界値以下の時とほぼ同じ上昇度になるが、表面温度の上昇度が減少してくる。そのため、表面温度の上昇度から中身飲料５の温度を予測できない。そこで、これらの場合での加熱時間の制御について説明する。
【００２９】
図９は、インバータ６の運転状態と缶５０の表面温度と中身飲料５の温度との関係を示す図である。図９では、図８の場合と同様に、インバータ６への通電開始後、 t ₀ 秒経過した時から t ₁ 秒間隔で缶表面の温度をサンプリングし、サンプリング毎に表面温度の上昇度を求める。サンプリング開始してから n ＊ t ₁ 秒経過した時の温度上昇度 a _n は数式１により近似的に表される。
次に、缶表面温度 T _n が限界値 T _v 以上になったら、前回のサンプリング時に求めた温度上昇度 a _n-1 により目標温度 T _a に達する時間 t _on を予測し、その時間だけインバータ６の通電を行う。その加熱時間 t _on は次式により求められる。
【００３０】
【数６】

【００３１】
このようにして、温度センサ７により測定された缶５０の表面温度にもとづいて中身飲料５の温度を推定してその推定時間にもとづき加熱時間の制御をすることで、加熱停止後の撹拌時間が不要となり、その分販売時間が短縮される。
【００３２】
【発明の効果】
以上述べたように本発明によれば、次のような効果が得られる。
（１）缶を水平姿勢に保持した状態で回転させ、またこのとき回転数を変えたり、回転方向を反転したり、さらには缶を往復運動させるようにすることで、缶に発生した熱が速やかに中身飲料に伝達される。その結果、缶表面温度が急激に上昇することがなくなり、缶焦げを防止することができる。
【００３３】
（２）また、所定時間加熱後、缶を水平姿勢に保持した状態で回転させ、またこのとき回転数を変えたり、回転方向を反転させたり、さらには缶を往復運動させるようにすることで、缶に発生した熱が速やかに中身飲料に伝達される。その結果、中身飲料の温度が均一になるまでの時間が短くなり、加熱時間（販売時間）を短くできる。
（３）さらに、加熱時の缶表面温度の上昇度により中身温度を予測して加熱制御をすることで、中身飲料の温度を検知（推測）するためにインバータを停止させる必要がなくなり、その分、加熱時間（販売時間）を短くできる。
【図面の簡単な説明】
【図１】本発明の実施形態の外観図である。
【図２】図１の要部を取り出して示した斜視図である。
【図３】図１の横断面図である。
【図４】実施形態で加熱と回転を同時に実行する場合のタイミングチャートである。
【図５】実施形態で加熱と回転を同時に実行する場合のタイミングチャートである。
【図６】実施形態で加熱終了後も回転を継続する場合のタイミングチャートである。
【図７】実施形態で加熱終了後も回転を継続する場合のタイミングチャートである。
【図８】インバータの運転状態と缶の表面温度と中身飲料の温度との関係を示す図である。
【図９】インバータの運転状態と缶の表面温度と中身飲料の温度との関係を示す図である。
【符号の説明】
１加熱コイル
２ローラ
２ａ突起または溝
３ローラ
４モータ
５中身飲料
６インバータ
７温度センサ
８フェライト
５０缶[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction heating device of a vending machine that sells can beverages by electromagnetic induction heating.
[0002]
[Prior art]
Conventionally, there is Japanese Patent Application No. 09-117672 by this applicant as this kind of induction heating apparatus. This apparatus is equipped with a rotation mechanism, and rotates the can at a constant rotation speed during or after heating, and stirs the content drink of the can to make the temperature of the content drink uniform. In addition, a temperature sensor is provided, the heating is temporarily stopped during the heating, the surface temperature of the can is measured after the can surface temperature is stabilized, and it is determined whether or not the heating is continued as the can content beverage temperature. In addition to this device, there is also a device in which a can is inclined at a certain angle by a rotation mechanism and then stirred at a constant rotation speed.
[0003]
[Problems to be solved by the invention]
However, these conventional devices have the following problems.
(1) Because the stirring effect of the can contents beverage is small, the efficiency of transferring the heat generated on the can surface to the contents beverage is low, the can surface temperature is locally high, and the can is burnt.
(2) In the device that includes a temperature sensor and controls the on / off of the inverter that drives the heating coil based on the measured temperature, the content beverage is agitated after heating for a predetermined time. There is a problem that it takes time until the temperature and the content beverage temperature become compatible, and the heating time (sales time) becomes long.
(3) When a temperature sensor is also provided and the beverage temperature is predicted by the measured can surface temperature, the heating is temporarily stopped and the can surface temperature is stabilized before the can surface temperature is measured. There is a problem that it takes time until the surface temperature of the can and the temperature of the content beverage become compatible, and the heating time (sales time) becomes long.
[0004]
[Means for Solving the Problems]
Therefore, in order to solve the above-mentioned problem, the invention of claim 1 is a can beverage induction heating apparatus that heats a beverage-containing can using electromagnetic induction heating in a state where the can is held in a horizontal position when the can is heated. A means for rotating and rotating the can for a predetermined time after heating is provided.
[0005]
According to the second aspect of the present invention, an electromagnetic induction heating coil is disposed around a beverage-containing can, and electric power is intermittently supplied to the coil from the inverter, and a temperature sensor for measuring the surface temperature of the can is provided. Compare the measured temperature of the temperature sensor with the pre-stored target temperature every time a fixed time has elapsed after stopping energization of the battery, and when the measured temperature reaches the target temperature, The induction heating apparatus is characterized by comprising means for rotating the can in a horizontal position after the can is heated.
[0006]
According to a third aspect of the present invention , an electromagnetic induction heating coil is arranged around a beverage-containing can, and electric power is intermittently supplied to the coil from the inverter, and a temperature sensor for measuring the surface temperature of the can is provided. The heating capacity is obtained from the temperature rise value obtained from the temperature measured by the temperature sensor after the energization for a predetermined time and the energization time of the inverter, and the can beverage is heated to the pre-stored target temperature based on the heating capacity. In the can beverage induction heating device that predicts the operation time required for the operation and stops the operation of the inverter after the predicted time has elapsed, the can has a means for rotating the can in a horizontal position after heating the can. It is characterized by.
[0007]
The invention of claim 4 is characterized in that, in the invention of

claim

1, 2 or 3, it comprises means for increasing or decreasing the rotational speed when rotating the can.
[0008]
The invention of claim 5 is characterized in that in the invention of

claim

1, 2, 3 or 4, there is provided means for rotating the can and reversing the direction of rotation repeatedly .
[0009]
The invention of claim 6 is characterized in that, in the invention of

claim

1, 2, 3, 4 or 5, a means for rotating the can and reciprocating the can in the direction of the rotation axis is provided.
[0010]
According to a seventh aspect of the present invention, there is provided a can beverage induction heating apparatus for heating a beverage-containing can using electromagnetic induction heating, and a temperature sensor for measuring the surface temperature of the can, and a time change of a measurement value of the temperature sensor. Means for calculating the temperature rise value during heating, means for estimating the temperature of the content beverage based on the calculated temperature rise value, and the temperature detected by the temperature sensor reaches the heating limit temperature of the can surface stored in advance. Means for determining whether or not the temperature has reached the limit temperature, and means for calculating the heating time based on the temperature rise value so far, the content beverage temperature estimated at that time, and the pre-stored target temperature And means for stopping the heating after the calculated heating time has elapsed .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of the embodiment, FIG. 2 is a perspective view showing an essential part of FIG. 1, and FIG. 3 is a cross-sectional view of FIG. In the figure, 50 is a can, and the inside beverage 5 is filled therein. The can 50 is placed on a pair of

rollers

2 and 2 supported in parallel and horizontally at the same level, and the upper portion of the can 50 is pressed by a roller 3 parallel to the

rollers

2 and 2. The can 50 is supported at three points as a whole. The roller 2 is connected to the motor 4 and is driven to rotate, so that the can 50 rotates in a horizontal posture.
[0013]
Further, as shown in FIG. 2, the roller 2 has a spiral protrusion or groove 2a formed on the surface thereof, so that the can 50 can be moved in the axial direction while rotating. Further, the heating coil 1 is arranged so as to surround the lower portion of the can 50 below the roller 2. As shown in FIG. 3, the heating coil 1 is supported by a ferrite 8 and connected to an inverter 6.
[0014]
Further, a temperature sensor 7 is disposed above the can 50 and measures the surface temperature of the can 50.
In these configurations, the operation for driving the heating coil 1 by the inverter 6, there is operation of rotating the roller 2 by

motors

4, and to exit start rotating and the heating time at the same time as the timing of the operation, heating In some cases, the rotation is started at the same time and the rotation is continued for a certain time after the heating is completed.
[0015]
FIG. 4 is a timing chart when heating and rotation are performed simultaneously. Here, when the output of the inverter 6 is on, the rotational speed (rotational speed) of the motor 4 is repeatedly changed linearly between the high speed R4 and the low speed R5, and the can 50 changes its rotational speed. Thus, acceleration and deceleration are repeated, and the content beverage 5 is efficiently stirred by being reciprocated.
[0016]
FIG. 5 is also a timing chart when heating and rotation are performed simultaneously. Here, when the output of the inverter 6 is on, the rotational speed of the motor 4 is repeatedly changed linearly from R6 in the forward rotation direction to R6 in the reverse rotation direction. In other words, the can 50 is repeatedly rotated forward and reverse alternately, and the content beverage 5 is efficiently stirred by being driven back and forth.
[0017]
FIG. 6 is a timing chart when the rotation is continued even after the heating is completed. Here, when the output of the inverter 6 is on, the motor 4 is rotated at the rotational speed R1, and when the output of the inverter 6 is turned off, the rotational speed of the motor 4 is set to a high speed R1 for a certain time. And the low-speed R2 are repeatedly changed linearly. Here, the can 50 is repeatedly accelerated and decelerated by changing the rotation speed, and the content beverage 5 is efficiently stirred by being reciprocated.
[0018]
FIG. 7 is also a timing chart in the case where the rotation is continued after the heating is finished. Here, when the output of the inverter 6 is turned on in advance by rotating the motor 4 at a rotation speed R3 in the forward direction, the output of the inverter 6 is turned off, a fixed time, the motor 4 The number of revolutions is linearly repeated between R3 in the forward rotation direction and -R3 in the reverse rotation direction. Here, the can 50 is repeatedly rotated forward and reverse alternately, and the content beverage 5 is efficiently stirred by being driven back and forth.
[0019]
Next, a case where the heating time is controlled based on the temperature measured by the temperature sensor 7 will be described.
FIG. 8 is a diagram showing the relationship between the operating state of the inverter 6, the surface temperature of the can 50, and the temperature of the content beverage 5. The degree of increase in the surface temperature and the temperature increase of the content beverage 5 are approximately equal and rise to the right. It becomes a straight line.
After the start of energization of the inverter 6, the temperature of the can surface is sampled at intervals of t ₁ seconds after t ₀ seconds have elapsed, and the degree of increase in the surface temperature is obtained every sampling. Temperature rise of a _n when from the start of sampling has elapsed n * t ₁ seconds is approximately expressed by the following equation.
[0020]
[Expression 1]

[0021]
Here, n is an integer equal to or greater than 1. Particularly, when n = 1 , Formula 1 is expressed by the following formula.
[0022]
[Expression 2]

[0023]
It may determine a temperature T _d of the contents beverage thus using the temperature rise of a _n obtained. That is, when the can surface temperature before heating is T _s , the temperature T _d is expressed by the following equation.
[0024]
[Equation 3]

[0025]
Temperature T _d of the contents beverage obtained in this manner is compared with the target temperature T _a which has been stored in advance, and stops energizing the inverter 6 at the time when a T _d ≧ T _a.
When the sampling interval t ₁ described above is 1 second,

Equations

1 and 2 are as follows.
[0026]
[Expression 4]

[0027]
[Equation 5]

[0028]
By the way, in the control mentioned above, it is established when the increase in the surface temperature of the can 50 is equal to the increase in the temperature of the content beverage 5, but depending on the material of the can 50 and the target heating temperature, the surface temperature of the can during the heating. When the temperature rises above a certain temperature (limit value), there is a characteristic that the degree of rise in the surface temperature thereafter and the degree of rise in the temperature of the content beverage 5 do not become the same. That is, when the surface temperature is equal to or higher than the limit value, the temperature increase degree of the content beverage 5 is almost the same as that when the surface drink is equal to or lower than the limit value, but the increase degree of the surface temperature decreases. Therefore, the temperature of the content beverage 5 cannot be predicted from the degree of increase in the surface temperature. Therefore, control of the heating time in these cases will be described.
[0029]
FIG. 9 is a diagram illustrating a relationship among the operation state of the inverter 6, the surface temperature of the can 50, and the temperature of the content beverage 5. 9, as in the case of FIG. 8, energization After the start to the inverter 6, samples the temperature of the can surface at t ₁ second intervals from the time that has elapsed t ₀ seconds, the rise of the surface temperature for each sampling Ask. Temperature rise of a _n when elapsed n * t ₁ seconds after the start of sampling is approximately expressed by Equation 1.
Next, when the can surface temperature T _n is equal to or greater than the threshold T _v, to predict the time t _on to reach the target temperature T _a by the temperature rise of a _n-1 obtained at the previous sampling, the inverter 6 only that time Turn on the power. The heating time t _on is obtained by the following equation.
[0030]
[Formula 6]

[0031]
In this manner, the temperature of the beverage 5 is estimated based on the surface temperature of the can 50 measured by the temperature sensor 7 and the heating time is controlled based on the estimated time, whereby the stirring time after the heating is stopped. It becomes unnecessary and the sales time is reduced accordingly.
[0032]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
(1) By rotating the can in a horizontal position, changing the number of rotations, reversing the direction of rotation, and reciprocating the can, the heat generated in the can Promptly communicated to the beverage. As a result, the can surface temperature does not rise rapidly, and the can can be prevented from being burnt.
[0033]
(2) In addition, after heating for a predetermined time, the can is rotated while being held in a horizontal position. At this time, the rotational speed is changed, the direction of rotation is reversed, and the can is reciprocated. The heat generated in the can is quickly transferred to the beverage. As a result, the time until the temperature of the content beverage becomes uniform is shortened, and the heating time (sales time) can be shortened.
(3) In addition, by setting the prediction to heating control contents temperature by increasing the degree of the can surface temperature at the time of heating, it is not necessary to Ru inverter is stopped in order to detect the temperature of the contents beverage (guess), its Minutes and heating time (sales time) can be shortened.
[Brief description of the drawings]
FIG. 1 is an external view of an embodiment of the present invention.
FIG. 2 is a perspective view showing a main part of FIG.
3 is a cross-sectional view of FIG.
FIG. 4 is a timing chart in the case where heating and rotation are performed simultaneously in the embodiment.
FIG. 5 is a timing chart in the case where heating and rotation are performed simultaneously in the embodiment.
FIG. 6 is a timing chart in the case where rotation is continued even after the end of heating in the embodiment.
FIG. 7 is a timing chart in the case where rotation is continued even after the end of heating in the embodiment.
FIG. 8 is a diagram showing the relationship between the operating state of the inverter, the surface temperature of the can, and the temperature of the content beverage.
FIG. 9 is a diagram showing the relationship between the operating state of the inverter, the surface temperature of the can, and the temperature of the content beverage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heating coil 2 Roller 2a Protrusion or groove 3 Roller 4 Motor 5 Contents drink 6 Inverter 7 Temperature sensor 8 Ferrite 50 Can

Claims

In a can beverage induction heating apparatus that heats a can containing beverage using electromagnetic induction heating,
An induction heating apparatus for can beverages, comprising means for rotating a can in a horizontal position when the can is heated and rotating the can continuously for a predetermined time after the can is heated.

After disposing the electromagnetic induction heating coil around the beverage-containing can and intermittently supplying power from the inverter to this coil, and providing a temperature sensor for measuring the surface temperature of the can and stopping the energization from the inverter In the canned beverage induction heating device that compares the measured temperature of the temperature sensor with a pre-stored target temperature every time a certain time elapses, and stops the operation of the inverter when the measured temperature reaches the target temperature,
An induction heating apparatus for can beverage comprising a means for rotating the can in a state of being held in a horizontal position after the can is heated.

An electromagnetic induction heating coil is arranged around a beverage-containing can, and electric power is intermittently supplied to the coil from the inverter, and a temperature sensor for measuring the surface temperature of the can is provided. The heating capacity is obtained from the temperature rise value obtained from the measured temperature of the sensor and the energization time of the inverter, and the operation time required to heat the can beverage to the pre-stored target temperature is predicted based on the heating capacity. In the canned beverage induction heating device that stops the operation of the inverter after the predicted time has elapsed,
An induction heating apparatus for can beverage comprising a means for rotating the can in a state of being held in a horizontal position after the can is heated.

In the induction heating device for can beverage according to claim 1, 2, or 3,
An induction heating apparatus for a can beverage, comprising means for increasing or decreasing the rotation speed when rotating the can.

The induction heating apparatus for can beverage according to claim 1, 2, 3, or 4,
An induction heating apparatus for a can beverage, comprising means for rotating a can and reversing the direction of rotation repeatedly.

In the induction heating apparatus for can beverage according to claim 1, 2, 3, 4, or 5,
An induction heating apparatus for a can beverage comprising means for rotating a can and reciprocating the can in a rotation axis direction.

In a can beverage induction heating apparatus that heats a can containing beverage using electromagnetic induction heating,
A temperature sensor for measuring the surface temperature of the can;
Means for calculating a temperature rise value during heating from the time change of the measured value of the temperature sensor;
Means for estimating the temperature of the content beverage based on the calculated temperature rise value;
Means for determining whether or not the temperature detected by the temperature sensor has reached the pre-stored heating limit temperature of the can surface;
Means for calculating the heating time based on the temperature rise value up to that point, the content beverage temperature estimated at that time, and the target temperature stored in advance when the limit temperature is reached;
Means for stopping the heating after the calculated heating time has elapsed ;
An induction heating apparatus for can beverages, comprising: