JP2553740B2 - High frequency heater - Google Patents
High frequency heaterInfo
- Publication number
- JP2553740B2 JP2553740B2 JP2149404A JP14940490A JP2553740B2 JP 2553740 B2 JP2553740 B2 JP 2553740B2 JP 2149404 A JP2149404 A JP 2149404A JP 14940490 A JP14940490 A JP 14940490A JP 2553740 B2 JP2553740 B2 JP 2553740B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- frequency
- heating chamber
- pressure
- food
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims description 37
- 235000013305 food Nutrition 0.000 claims description 15
- 230000006837 decompression Effects 0.000 claims description 10
- 238000010257 thawing Methods 0.000 description 7
- 238000009835 boiling Methods 0.000 description 6
- 238000010411 cooking Methods 0.000 description 3
- 235000013611 frozen food Nutrition 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Ovens (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は高周波加熱器に関し、とくに減圧下におい
て、高周波加熱により冷凍食品を解凍するものである。Description: TECHNICAL FIELD The present invention relates to a high-frequency heater, and more particularly, to thaw frozen food by high-frequency heating under reduced pressure.
従来の技術 従来より減圧下における食品の高周波加熱について
は、特開昭59−41717号公報にあるように（第４図参
照）、密閉自在な調理室21と調理室21を減圧する減圧装
置22と高周波発振器23およびヒータ24などの加熱手段を
備え、加熱調理終了後には短時間に食品を調理可能な温
度まで冷却したり、減圧により沸点を自在に選択し仕上
り状態を選択することができるというものであった。2. Description of the Related Art Conventionally, as for high-frequency heating of food under reduced pressure, as shown in Japanese Patent Laid-Open No. 59-41717 (see FIG. 4), a cooking chamber 21 that can be sealed and a decompression device 22 for decompressing the cooking chamber 21 are used. With a heating means such as a high-frequency oscillator 23 and a heater 24, it is possible to cool the food to a temperature at which it can be cooked in a short time after completion of cooking, or to freely select the boiling point by decompression and select the finished state. It was a thing.
発明が解決しようとする課題 しかしながら、このような従来の高周波加熱器の構成
においては、卵焼き、お好み焼きなどの加熱を中心に沸
点が50〜100℃の範囲で減圧がなされているため、冷凍
食品の解凍において加熱のしすぎや、コーナ部は電波が
集中しやすいなどの性質により、冷凍食品の温度が部分
的に蛋白質の凝固温度以上となりコーナ部などの一部が
煮えはじめても、まだ食品の中心部は包丁も入らないく
らい、温度が低いという状態になっていた。もっと真空
に近い状態に減圧して、さらに沸点を下げれば一部だけ
の煮えはじめは緩和されるが、パッシェンの法則からも
明らかなように、真空に近くなるある段階までは火花電
圧が低下しつづけ、放電現象が起きやすくなるという欠
点があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the configuration of such a conventional high-frequency heater, since the boiling point is reduced in the range of 50 to 100 ° C. mainly for heating of omelet, okonomiyaki, etc., of frozen foods Due to the excessive heating during thawing and the tendency for radio waves to concentrate at the corners, even if the temperature of the frozen food partially exceeds the freezing temperature of the protein and some of the corners begin to boil, the center of the food still remains. The temperature was so low that I couldn't even insert a knife. If the pressure is reduced to a state closer to a vacuum and the boiling point is further lowered, only part of the boiling begins to be relieved, but as is clear from Paschen's law, the spark voltage decreases until a certain stage near the vacuum. In addition, there is a drawback that the discharge phenomenon is likely to occur.
本発明はこのような欠点を解決するもので、放電現象
を防止し、食品を均一な温度で解凍できる信頼性の高い
高周波加熱器を提供することを目的とする。The present invention solves such drawbacks, and an object of the present invention is to provide a highly reliable high-frequency heater capable of preventing a discharge phenomenon and thawing food at a uniform temperature.
課題を解決するための手段 この目的を達成するために、本発明は高周波加熱器は
食品を収納する加熱室と、前記加熱室に高周波電力を供
給する高周波発振器と、高周波電力の強さを制御する給
電制御装置と、前記加熱室内を減圧する減圧装置とを備
え、前記給電制御装置は高周波発振器からの高周波電力
を制御して複数の加熱段階を作る構成とするとともに前
記減圧装置は前記複数の加熱段階に対して加熱室内の圧
力を変えるように構成したものである。Means for Solving the Problems In order to achieve this object, the present invention relates to a high-frequency heater, a heating chamber for storing food, a high-frequency oscillator for supplying high-frequency power to the heating chamber, and controlling the strength of the high-frequency power. And a decompression device for decompressing the inside of the heating chamber, wherein the power supply control device is configured to control a high frequency power from a high frequency oscillator to create a plurality of heating stages, and the decompression device includes a plurality of the decompression devices. The pressure in the heating chamber is changed with respect to the heating stage.
作用 このような本発明の高周波加熱器では、食品を収納す
る加熱室を減圧状態とし、高出力で加熱する段階は減圧
状態でやや高目の圧力とし、低出力で加熱する段階では
真空に近い低めの圧力に制御する構成としているので食
品の解凍に必要な加熱を行ないつつ、放電現象を防止す
ることができる。In such a high-frequency heater of the present invention, the heating chamber containing the food is depressurized, the step of heating at high output is slightly higher pressure in the depressurized state, and the step of heating at low output is close to vacuum. Since the pressure is controlled to be low, it is possible to prevent the discharge phenomenon while performing the heating required for thawing the food.
実 施 例 以下、本発明の一実施例の高周波加熱器について、第
１図〜第３図をもとにして説明する。Example Hereinafter, a high-frequency heater according to an example of the present invention will be described with reference to FIGS. 1 to 3.
第１図において本実施例の高周波加熱器は、食品１を
収納する加熱室２に、高周波電力を供給する高周波発振
器３が結合されている。高周波発振器３は給電制御装置
４により制御される。給電制御装置４は出力切り換えス
イッチ５により高周波出力の切り換えが可能となってい
る。加熱室２には減圧装置６が結合されており、加熱室
２内の圧力を調節する構成になっている。Referring to FIG. 1, in the high frequency heater according to the present embodiment, a high frequency oscillator 3 that supplies high frequency power is coupled to a heating chamber 2 that houses a food 1. The high frequency oscillator 3 is controlled by the power feeding control device 4. The power feeding control device 4 can switch the high frequency output by the output changeover switch 5. A decompression device 6 is coupled to the heating chamber 2 and is configured to adjust the pressure inside the heating chamber 2.
本実施例の動作を説明すると、第２図のタイムチャー
トにおいて、加熱室２内に食品１を収納し蓋７で加熱室
２の開口部を塞ぎ、減圧装置６を作動して減圧する。加
熱室２内の圧力が約100Torr程度になったら、加熱をス
タートする。この時、高周波出力は高出力P1に設定され
ている。解凍が進行し食品１の一部が解凍しはじめたら
高周波出力を低出力P2に切り換える。加熱室６内の圧力
は加熱開始から徐々に真空に近くなるように減圧されて
行き、加熱の途中では沸点が蛋白質の凝固温度よりも充
分低くなるような圧力に減圧されている。The operation of this embodiment will be described. In the time chart of FIG. 2, the food 1 is stored in the heating chamber 2, the opening of the heating chamber 2 is closed by the lid 7, and the decompression device 6 is operated to reduce the pressure. When the pressure in the heating chamber 2 reaches about 100 Torr, heating is started. At this time, the high frequency output is set to high output P 1 . When the thawing progresses and a part of the food 1 begins to thaw, the high frequency output is switched to the low output P 2 . The pressure in the heating chamber 6 is gradually reduced from the start of heating so as to be closer to a vacuum, and is reduced to a pressure at which the boiling point is sufficiently lower than the coagulation temperature of protein during heating.
なお、給電制御装置４は圧力計８からの信号12より、
加熱室２内の圧力が減圧されすぎて、実験から求められ
た、各高周波出力で放電が発生しやすい圧力まで下がっ
た時は、放電予告表示灯９を点灯させるとともに、低目
の高周波出力に切り換えて加熱する構成となっている。In addition, the power supply control device 4 receives the signal 12 from the pressure gauge 8 from
When the pressure in the heating chamber 2 is excessively reduced, and the pressure drops to the level at which discharge is likely to occur at each high-frequency output obtained from the experiment, the discharge notice indicator lamp 9 is turned on and a low high-frequency output is set. It is configured to switch and heat.
このような構成によれば、高周波出力を高出力として
も放電現象が起きず、解凍時間を短縮することができ
る。With such a configuration, the discharge phenomenon does not occur even when the high frequency output is high, and the thawing time can be shortened.
なお、本実施例では高周波出力をP1とP2の２段切り換
えとしたが、３段階以上としたり、高周波出力を切り換
える途中で高周波出力をゼロとする時間を設けることに
より、一層均一に解凍することができる。In this embodiment, the high frequency output is switched between P 1 and P 2 in two stages, but it is more uniformly defrosted by setting it in three stages or more, or by providing a time for making the high frequency output zero during switching of the high frequency output. can do.
発明の効果 以上の実施例の説明で明らかなように本発明の高周波
加熱器によれば、食品を収納する加熱室を減圧状態と
し、高出力で加熱する段階は減圧状態でやや高目の圧力
とし、低出力で加熱する段階では真空に近い低い圧力に
減圧することができるので、食品の解凍に必要な加熱を
行ないつつ、放電現象を防止することが可能となり、食
品の加熱を均一に行ない、短時間に良好な解凍が実現で
きる信頼性の高い高周波加熱器を提供することができ
る。EFFECTS OF THE INVENTION According to the high-frequency heater of the present invention as is clear from the above description of the embodiments, the heating chamber for storing food is in a decompressed state, and the step of heating at a high output is a slightly higher pressure in the decompressed state. At the stage of heating with low output, it is possible to reduce the pressure to a low pressure close to vacuum, so it is possible to prevent the discharge phenomenon while performing the heating necessary for thawing the food, and to uniformly heat the food. Therefore, it is possible to provide a highly reliable high-frequency heater that can achieve good thawing in a short time.
第１図は本発明の一実施例の高周波加熱器の構成を示す
断面図、第２図は本実施例の高周波加熱器の動作を示す
タイムチャート、第３図は圧力と水の沸点の関係を示す
図、第４図は従来の高周波加熱器の構成を示す斜視図で
ある。 １……食品、２……加熱室、３……高周波発振器、４…
…給電制御装置、５……出力切り換えスイッチ、６……
減圧装置。FIG. 1 is a sectional view showing the structure of a high-frequency heater according to an embodiment of the present invention, FIG. 2 is a time chart showing the operation of the high-frequency heater according to this embodiment, and FIG. 3 is a relationship between pressure and boiling point of water. FIG. 4 is a perspective view showing the structure of a conventional high-frequency heater. 1 ... Food, 2 ... Heating room, 3 ... High-frequency oscillator, 4 ...
… Power supply controller, 5 …… Output changeover switch, 6 ……
Decompression device.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山下 誠一 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 実開 昭58−109194（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Seiichi Yamashita 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References
Claims (1)
周波電力を供給する高周波発振器と、高周波電力の強さ
を制御する給電制御装置と、前記加熱室内を減圧する減
圧装置とを備え、前記給電装置は高周波発振器からの高
周波電力を制御して複数の加熱段階を作る構成とすると
ともに前記減圧装置は前記複数の加熱段階に対して加熱
室内の圧力を変えるように構成した高周波加熱器。1. A heating chamber for storing food, a high-frequency oscillator for supplying high-frequency power to the heating chamber, a power supply control device for controlling the intensity of the high-frequency power, and a decompression device for decompressing the heating chamber. The power feeding device is configured to control high frequency power from a high frequency oscillator to create a plurality of heating stages, and the decompression device is configured to change the pressure in the heating chamber for the plurality of heating stages. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2149404A JP2553740B2 (en) | 1990-06-07 | 1990-06-07 | High frequency heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2149404A JP2553740B2 (en) | 1990-06-07 | 1990-06-07 | High frequency heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0443225A JPH0443225A (en) | 1992-02-13 |
| JP2553740B2 true JP2553740B2 (en) | 1996-11-13 |
Family
ID=15474393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2149404A Expired - Fee Related JP2553740B2 (en) | 1990-06-07 | 1990-06-07 | High frequency heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553740B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2679372B2 (en) * | 1990-08-08 | 1997-11-19 | 松下電器産業株式会社 | High frequency heater |
| US5767487A (en) * | 1992-03-17 | 1998-06-16 | Tippmann; Eugene R. | Subatmospheric pressure cooking device |
| ATE267505T1 (en) * | 1993-07-30 | 2004-06-15 | Eugene R Tippmann | METHOD FOR COOKING AT SUBPRESSION |
-
1990
- 1990-06-07 JP JP2149404A patent/JP2553740B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0443225A (en) | 1992-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |