JPS6115334B2 - - Google Patents

Description

【発明の詳細な説明】 本発明は、ヒータ及び該ヒータにより加熱され
た雰囲気を熱風として調理室に送風するフアンを
備え、所謂熱風調理を可能とした電子レンジに関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microwave oven that is equipped with a heater and a fan that blows the atmosphere heated by the heater into a cooking chamber as hot air, thereby enabling so-called hot-air cooking.

第１図はこの種電子レンジの従来例を示し、１
は電子レンジの外筐、２は該外筐に収納された調
理室、３は該調理室の前面開口を開閉するドア、
４は該ドア上部の上記外筐１前面に設けられた操
作パネル部、５は上記調理室２内にて食品６を載
置回転するターンテーブル、７は該ターンテーブ
ルを回動するギヤードモータ、８は上記食品６を
加熱するマイクロ波を発振するマグネトロン、９
は該マグネトロン冷却用のブロワーモータ、１０
ａ，１０ｂは上記調理室２上壁面に穿設された第
１，第２小孔群、１１は該第１，第２小孔群に跨
つて上記調理室２上に設置された通風ダクト、１
２は該ダクト内に装着されたヒータ、１３は該ヒ
ータにより加熱された雰囲気を熱風として上記通
風ダクト１１を介して第２小孔群１０ｂから上記
調理室２に送風すると共に、上記調理室２の雰囲
気を第１小孔群１０ａから上記通風ダクト１１内
に吸気する循環用フアンで、該フアンはベルト１
４を介して上記ブロワーモータ９にて回動され
る。１５は上記第２小孔群１０ｂから送風される
熱風の方向を変更するヒータノズルで、該ノズル
は手動で回動可能となるように装着されている。
１６は上記調理室２内の雰囲気を外部に排気する
排気ダクト、１７は該排気ダクト内に装着され排
気温度を検知するサーミスタ等の温度検出素子で
ある。 Figure 1 shows a conventional example of this type of microwave oven.
2 is an outer casing of the microwave oven; 2 is a cooking chamber housed in the outer casing; 3 is a door that opens and closes the front opening of the cooking chamber;
4 is an operation panel provided on the front surface of the outer casing 1 above the door; 5 is a turntable for placing and rotating the food 6 in the cooking chamber 2; 7 is a geared motor for rotating the turntable; 8 is a magnetron that oscillates microwaves to heat the food 6; 9;
is a blower motor for cooling the magnetron, 10
a, 10b are first and second small hole groups bored in the upper wall surface of the cooking chamber 2; 11 is a ventilation duct installed above the cooking chamber 2 across the first and second small hole groups; 1
Reference numeral 2 denotes a heater installed in the duct; 13, the atmosphere heated by the heater is blown into the cooking chamber 2 through the ventilation duct 11 from the second small hole group 10b; is a circulation fan that sucks the atmosphere from the first small hole group 10a into the ventilation duct 11, and the fan
4 and is rotated by the blower motor 9. Reference numeral 15 denotes a heater nozzle for changing the direction of the hot air blown from the second small hole group 10b, and this nozzle is mounted so as to be rotatable manually.
16 is an exhaust duct for exhausting the atmosphere inside the cooking chamber 2 to the outside, and 17 is a temperature detection element such as a thermistor installed in the exhaust duct to detect the temperature of the exhaust gas.

斯る装置で、調理室２の略均一温度の雰囲気に
よるオーブン調理を行なうには、ヒータノズル１
５を実線の位置に回動すれば良い。すると、熱風
は実線矢印のように直接食品６に吹き当たらない
方向に循環する。然らば、調理室２内の雰囲気温
度は略均一となり、オーブン調理が可能となる。
従つて、自然対流によつて上昇してくる温度検出
素子１７付近の雰囲気温度も調理室２内の雰囲気
温度と略同一となり、よつて雰囲気温度の制御に
よるオーブン調理も可能となる。 With such an apparatus, in order to perform oven cooking in an atmosphere with a substantially uniform temperature in the cooking chamber 2, the heater nozzle 1 must be
5 should be rotated to the position indicated by the solid line. Then, the hot air circulates in a direction that does not directly hit the food 6, as shown by the solid arrow. Therefore, the atmospheric temperature in the cooking chamber 2 becomes substantially uniform, and oven cooking becomes possible.
Therefore, the ambient temperature near the temperature detection element 17, which rises due to natural convection, becomes approximately the same as the ambient temperature in the cooking chamber 2, and oven cooking by controlling the ambient temperature becomes possible.

一方、集中熱風によるグリル調理を行なうには
熱風を破線矢印のように食品６に集中すべくヒー
タノズル１５を破線の位置に回動すれば良い。然
るに、斯る場合は調理室２内の雰囲気温度に均一
性を欠き、温度検出素子１７での温度制御による
グリル調理は行なわれ難くなる。 On the other hand, in order to perform grill cooking using concentrated hot air, the heater nozzle 15 may be rotated to the position shown by the broken line in order to concentrate the hot air on the food 6 as shown by the broken line arrow. However, in such a case, the atmospheric temperature within the cooking chamber 2 lacks uniformity, making it difficult to perform grill cooking by temperature control using the temperature detection element 17.

本発明は斯る点に鑑みてなされたもので、以下
本発明実施例を図面を参照して詳述する。尚、従
来例と同一部分には同一符号を記してその説明は
省略する。 The present invention has been made in view of these points, and embodiments of the present invention will be described in detail below with reference to the drawings. Incidentally, the same parts as in the conventional example are denoted by the same reference numerals, and the explanation thereof will be omitted.

即ち、第２図に於いて、１８は調理室２上壁面
に穿設された開口、１９は該開口に嵌着されたマ
イクロ波防止リングで、該リングは、マイクロ波
調理時に於けるマイクロ波の通過は阻止するが、
調理室２からの赤外線は通過せしめる。２０は上
記リング１９を通過した赤外線を周期的に断続す
るチヨツパ、２１は該チヨツパを周期的に回動す
るモータ、２２はチヨツパ２０による断続にて、
調理室２及びチヨツパ２０からの赤外線を交互に
反射集束する凹面鏡で、該凹面鏡は揺動自在に枢
着されている。２３は上記凹面鏡２２を外部操作
にて揺動するように操作パネル部４に設けられた
凹面鏡操作ハンドルで、これら凹面鏡２２及びハ
ンドル２３にて後述の赤外線検出素子の赤外線検
出視野を変更する変更手段が構成されている。２
４は上記凹面鏡２２による赤外線集束点に位置
し、上記凹面鏡２２にて反射集束された上記赤外
線を受光して食品６等の温度に応じた信号を出力
する焦電型赤外線検出素子で、該素子はタンタル
酸リチウム（LiTaO₃）結晶等にて形成されてい
る。２５は上記素子２４の出力する信号を増幅す
る増幅器である。尚、上記調理室２壁表面は赤外
線放射の良い非光沢仕上げ或いは琺瑯仕上げであ
る。 That is, in FIG. 2, 18 is an opening formed in the upper wall surface of the cooking chamber 2, 19 is a microwave prevention ring fitted into the opening, and the ring is designed to prevent microwaves during microwave cooking. Although it prevents the passage of
The infrared rays from the cooking chamber 2 are allowed to pass through. 20 is a chopper that periodically interrupts the infrared rays that have passed through the ring 19; 21 is a motor that periodically rotates the chopper;
It is a concave mirror that alternately reflects and focuses infrared rays from the cooking chamber 2 and chopper 20, and is pivotally mounted so as to be swingable. Reference numeral 23 denotes a concave mirror operation handle provided on the operation panel section 4 so that the concave mirror 22 can be swung by an external operation, and the concave mirror 22 and the handle 23 are used as changing means for changing the infrared detection field of the infrared detection element, which will be described later. is configured. 2
Reference numeral 4 denotes a pyroelectric infrared detection element located at the infrared convergence point of the concave mirror 22, which receives the infrared rays reflected and focused by the concave mirror 22 and outputs a signal corresponding to the temperature of the food 6, etc.; is formed of lithium tantalate (LiTaO ₃ ) crystal or the like. 25 is an amplifier for amplifying the signal output from the element 24. The wall surface of the cooking chamber 2 has a non-glossy finish or an enamel finish that emits infrared rays well.

斯る装置で、オーブン調理或いはグリル調理を
行なう場合のヒータノズル１５の位置は従来例と
同様である。 With such an apparatus, the position of the heater nozzle 15 when performing oven cooking or grill cooking is the same as in the conventional example.

そして、グリル調理の場合は、赤外線検出素子
２４の視野を食品６に向けるように、操作ハンド
ル２３を操作して実線に示す位置に凹面鏡２２を
揺動する。この様にすると、食品６からの赤外線
を直接受光でき、よつて食品の温度を略正確に検
知できる。 In the case of grill cooking, the operation handle 23 is operated to swing the concave mirror 22 to the position shown by the solid line so that the field of view of the infrared detection element 24 is directed toward the food 6. In this way, the infrared rays from the food 6 can be directly received, and the temperature of the food can therefore be detected almost accurately.

一方、オーブン調理の場合は、赤外線検出素子
２４の視野を調理室２側壁に向けるように、破線
の位置に凹面鏡２２を揺動する。 On the other hand, in the case of oven cooking, the concave mirror 22 is swung to the position indicated by the broken line so that the field of view of the infrared detection element 24 is directed toward the side wall of the cooking chamber 2.

即ち、オーブン調理に於いては、食品６を容器
内に収納するとか、或いはアルミ箔にて包装し、
その状態で調理する場合が生じ、それにて斯る場
合に上述のグリル調理に於ける位置に凹面鏡２２
を揺動すると、赤外線検出素子２４は上記容器等
からの赤外線を受光することになる。そして、上
記容器等の種類、形状等が異なると、それにより
赤外線検出素子２４に入射する赤外線量に変化を
示し、調理室２の均一温度にも拘わらず温度制御
によるオーブン調理を十分に行なうことができな
い。 That is, in oven cooking, the food 6 is stored in a container or wrapped in aluminum foil,
There may be cases where cooking is done in that state, and in such cases, the concave mirror 22 is placed in the position for grill cooking as described above.
When the container is oscillated, the infrared detecting element 24 receives infrared rays from the container or the like. If the type, shape, etc. of the containers etc. differ, the amount of infrared rays incident on the infrared detection element 24 will change accordingly, and oven cooking by temperature control will not be carried out sufficiently despite the uniform temperature of the cooking chamber 2. I can't.

よつて、上述のように赤外線検出素子２４の視
野を調理室２壁面に向けることにより、食品６の
容器等に拘わらず常に調理室２の温度を正確に把
握できる。 Therefore, by directing the field of view of the infrared detection element 24 toward the wall surface of the cooking chamber 2 as described above, the temperature of the cooking chamber 2 can always be accurately grasped regardless of the container of the food 6 or the like.

尚、調理室２壁は非光沢仕上げ或いは琺瑯仕上
げされているため、調理室２壁は調理室２内の雰
囲気にて熱せられ、それにてその雰囲気温度に応
じた赤外線を確実に放射できる。 Since the walls of the cooking chamber 2 are finished with a non-glossy finish or enamel, the walls of the cooking chamber 2 are heated by the atmosphere inside the cooking chamber 2, and thus can reliably radiate infrared rays according to the ambient temperature.

処で、本発明実施例では、赤外線検出素子２４
の視野の揺動はオーブン調理或いはグリル調理に
ついてだけ述べたが、勿論予熱或いはマイクロ波
調理等に於いても、それに応じて素子２４の視野
を揺動すれば更に電子レンジの機能を増大するこ
とができる。 However, in the embodiment of the present invention, the infrared detection element 24
The fluctuation of the field of view of the element 24 has been described only for oven cooking or grill cooking, but of course, the functionality of the microwave oven can be further increased by swinging the field of view of the element 24 accordingly in preheating, microwave cooking, etc. I can do it.

以上詳述した如く、本発明レンジによれば、マ
イクロ波及び熱風による様々な調理形態に応じ、
赤外線検出素子の視野を変化せしめ、最も好まし
い所の温度を検知するようにしたため、従来と較
べて温度制御運転を極めて正確に行なうことがで
きる。 As detailed above, according to the microwave oven of the present invention, according to various cooking methods using microwaves and hot air,
Since the field of view of the infrared detection element is changed to detect the temperature at the most preferable location, temperature control operation can be performed more accurately than in the past.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の電子レンジの断面図、第２図
は本発明実施例電子レンジの断面図である。 ２……調理室、１２……ヒータ、１３……循環
用フアン、１５……ヒータノズル、２４……焦電
型赤外線検出素子。 FIG. 1 is a sectional view of a conventional microwave oven, and FIG. 2 is a sectional view of a microwave oven according to an embodiment of the present invention. 2... Cooking chamber, 12... Heater, 13... Circulation fan, 15... Heater nozzle, 24... Pyroelectric infrared detection element.

Claims (1)

【特許請求の範囲】[Claims] １ 調理室、該調理室にマイクロ波を供給するマ
グネトロン、上記調理室外に設けられたヒータ、
該ヒータにより加熱された雰囲気を熱風として上
記調理室に送風するフアン、上記調理室からの赤
外線を受光し食品等の温度に応じた信号を出力す
る赤外線検出素子、上記マイクロ波及び熱風によ
る調理形態に応じて上記赤外線検出素子の視野を
変更する変更手段を備えたことを特徴とする電子
レンジ。1 a cooking chamber, a magnetron that supplies microwaves to the cooking chamber, a heater provided outside the cooking chamber,
A fan that blows the atmosphere heated by the heater into the cooking chamber as hot air, an infrared detection element that receives infrared rays from the cooking chamber and outputs a signal according to the temperature of the food, etc., and a mode of cooking using the microwave and hot air. A microwave oven characterized by comprising a changing means for changing the field of view of the infrared detecting element according to the above.