JP2002372245A - Microwave oven - Google Patents

Microwave oven

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Publication number
JP2002372245A
JP2002372245A JP2001178281A JP2001178281A JP2002372245A JP 2002372245 A JP2002372245 A JP 2002372245A JP 2001178281 A JP2001178281 A JP 2001178281A JP 2001178281 A JP2001178281 A JP 2001178281A JP 2002372245 A JP2002372245 A JP 2002372245A
Authority
JP
Japan
Prior art keywords
air
heating chamber
heating
duct
hot air
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.)
Pending
Application number
JP2001178281A
Other languages
Japanese (ja)
Inventor
Takahiro Hayashi
孝宏 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2001178281A priority Critical patent/JP2002372245A/en
Publication of JP2002372245A publication Critical patent/JP2002372245A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a microwave oven capable of utilizing cooling air which has cooled a magnetron can be effectively utilized for simultaneous heating by both hot air and microwave. SOLUTION: The microwave oven comprises a mean to generate hot air in a heating chamber 10 and circulate it; a means to feed a microwave; a blower fan 8 to cool magnetron 7 being a generating source for the microwave; a duct 9 to feed cooling air, which has cooled the magnetron 7, to the heating chamber; and a control part 4. The duct 9 is provided with a thermistor 19, and a moving damper 17 switched to a first air duct 21 to effect blast to the heating chamber 10 or a second air duct 22 not to effect blast to the heating chamber. During simultaneous heating by hot air and microwave, switching to either air duct is effected by the moving damper 17 based on a detecting temperature by the thermistor 19.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、電子レンジに関す
るものである。
[0001] The present invention relates to a microwave oven.

【0002】[0002]

【従来の技術】従来、熱風循環式とマイクロ波式の両機
能を合わせ持った調理器にあっては、同時加熱により、
スピ−ド調理を可能にしていた。マイクロ波加熱時は、
マグネトロンを冷却するため強制冷風を行い、その風は
冷却後加熱室に入れ、ドアガラスの曇り防止に活用され
ている。一方、熱風循環による加熱時に、加熱室内にこ
の冷却風が入ると加熱ムラに影響がでるため、通常は強
制風冷は行わない。しかし、同時加熱時には、マグネト
ロンを冷却する必要があるため強制風冷を行うが、上記
の理由で、冷却風を加熱室内に入れるためのダクト部に
ダンパ−を設け、加熱室以外に風を吐き出していたが、
前記風は、有効活用されていなかった。
2. Description of the Related Art Conventionally, in a cooking device having both functions of a hot air circulation type and a microwave type, by simultaneous heating,
Speed cooking was enabled. During microwave heating,
Forced cooling air is used to cool the magnetron, and after cooling, it is put into the heating room and used to prevent fogging of the door glass. On the other hand, when the cooling air enters the heating chamber during the heating by the circulation of the hot air, uneven heating is affected. Therefore, the forced air cooling is not usually performed. However, during simultaneous heating, forced air cooling is performed because it is necessary to cool the magnetron.However, for the above-mentioned reasons, a damper is provided in the duct to allow the cooling air to enter the heating chamber, and the air is discharged out of the heating chamber. Had been
The wind was not being used effectively.

【0003】[0003]

【発明が解決しようとする課題】熱風循環加熱とマイク
ロ波加熱の同時加熱時において、マグネトロンを冷却し
た冷却風を有効活用できる電子レンジを提供する。
SUMMARY OF THE INVENTION An object of the present invention is to provide a microwave oven capable of effectively utilizing a cooling air that has cooled a magnetron during simultaneous heating of hot air circulation heating and microwave heating.

【0004】[0004]

【課題を解決するための手段および発明の効果】本発明
に係る第1の電子レンジは、外装と、この外装内に形成
され前面に開口を有し食品を収納する加熱室と、この加
熱室の前面開口を開閉するドアと、前記加熱室に熱風を
発生させ循環させる手段と、マイクロ波を供給する手段
と、前記マイクロ波の発生源であるマグネトロンを冷却
するブロワ−ファンと、前記マグネトロンを冷却した冷
却風を加熱室に供給するダクトと、コントロ−ル部とを
備えた電子レンジにおいて、前記ダクトに、温度検知手
段と、前記加熱室へ送風する第1風路または前記加熱室
へ送風しない第2風路に切り換える風路切換手段とを設
け、熱風とマイクロ波による同時加熱時のとき、前記温
度検知手段による検知温度に基づき、前記風路切換手段
により前記いずれかの風路に切り換えることを特徴とす
る。
Means for Solving the Problems and Effects of the Invention A first microwave oven according to the present invention comprises an exterior, a heating chamber formed in the exterior and having an opening on the front side for storing food, and a heating chamber. A door for opening and closing a front opening of the heating chamber, means for generating and circulating hot air in the heating chamber, means for supplying a microwave, a blower fan for cooling a magnetron that is a source of the microwave, and the magnetron. In a microwave oven provided with a duct for supplying cooled cooling air to a heating chamber and a control unit, a temperature detecting means is provided to the duct, and a first air passage for blowing to the heating chamber or the heating chamber is blown to the heating chamber. Air path switching means for switching to a second air path not to be provided, and when simultaneous heating by hot air and microwaves is performed, the air path switching means based on the temperature detected by the temperature detection means. Wherein the switching of the air passage.

【0005】従って、熱風とマイクロ波による同時加熱
時のとき、前記ダクトに設けた温度検知手段による検知
温度に基づき、風路を切り換えることができ、風を有効
利用できる。
Therefore, at the time of simultaneous heating by hot air and microwaves, the air path can be switched based on the temperature detected by the temperature detecting means provided in the duct, and the wind can be used effectively.

【0006】本発明に係る第2の電子レンジは、熱風と
マイクロ波による同時加熱時のとき、前記温度検知手段
による検知温度が所定値より高い場合は、前記風路切換
手段は前記加熱室へ送風する第1風路に切り換り、前記
温度検知手段による検知温度が所定値より低い場合は、
前記風路切換手段は前記加熱室へ送風しない第2風路に
切り換ることを特徴とする。
In the second microwave oven according to the present invention, when the temperature detected by the temperature detecting means is higher than a predetermined value at the time of simultaneous heating by hot air and microwaves, the air path switching means moves to the heating chamber. When the temperature is switched to the first air path for blowing air and the temperature detected by the temperature detecting means is lower than a predetermined value,
The air path switching means switches to a second air path that does not send air to the heating chamber.

【0007】従って、熱風とマイクロ波による同時加熱
時のとき、前記ダクトに設けた温度検知手段による検知
温度に基づき、風路を切り換えることができ、風を有効
利用できる。
Therefore, at the time of simultaneous heating by hot air and microwaves, the air path can be switched based on the temperature detected by the temperature detecting means provided in the duct, and the wind can be used effectively.

【0008】[0008]

【発明の実施の形態】本発明の一実施形態の電子レンジ
を、図面を参照して説明する。図1は外装を切り欠いて
右上方から見た電子レンジの斜視図、図2は電子レンジ
の要部斜視図、図3は熱風加熱の回路図、図4は図3の
制御を行う回路図、図5はタイムチャ−トである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A microwave oven according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a microwave oven viewed from the upper right with a cutout, FIG. 2 is a perspective view of a main part of the microwave oven, FIG. 3 is a circuit diagram of hot air heating, and FIG. 4 is a circuit diagram for controlling FIG. FIG. 5 is a time chart.

【0009】図1は外装11を切り欠いた図で以下説明
する。
FIG. 1 is a cutaway view of the exterior 11, which will be described below.

【0010】電子レンジ1の前面には下端を軸として、
開閉可能なドア2が取り付けられ、ドア2は取っ手3を
有する。前記ドア2の右側には、コントロ−ル部4が設
けられている。前記ドア2の下側には、複数の小孔5a
を有する吸気部5が設けられている。加熱室10の下側
には、ブロワ−ファン8用の吸い込み開口部6が形成さ
れ、開口部6には複数の開口6aが形成されている。前
記ブロワ−ファン8は、マグネトロン7を冷却し、冷却
風を加熱室10に入れるためのダクト9が設けられてい
る。また、加熱室10の天面10aには、天面10aの
断熱材固定用のボックス12が形成されている。前記ボ
ックス12は、前記ダクト9からの風を内部の仕切り1
3に沿って、加熱室10の天面10aの前方に設けられ
ているパンチング部20(図2)から加熱室10内に入
れる為のダクトを兼ねている。なお、前記マグネトロン
7とダクト9をつなぐダクト14が設けられている。
On the front surface of the microwave oven 1, the lower end is used as an axis.
A door 2 that can be opened and closed is attached, and the door 2 has a handle 3. On the right side of the door 2, a control section 4 is provided. On the lower side of the door 2, a plurality of small holes 5a
Is provided. A suction opening 6 for the blower fan 8 is formed below the heating chamber 10, and the opening 6 has a plurality of openings 6a. The blower fan 8 is provided with a duct 9 for cooling the magnetron 7 and allowing cooling air to enter the heating chamber 10. A box 12 for fixing a heat insulating material on the top surface 10a is formed on the top surface 10a of the heating chamber 10. The box 12 divides the wind from the duct 9 into an internal partition 1.
Along 3, the duct also serves as a duct for entering the heating chamber 10 from the punching section 20 (FIG. 2) provided in front of the top surface 10 a of the heating chamber 10. A duct 14 connecting the magnetron 7 and the duct 9 is provided.

【0011】通常のマイクロ波運転時に、マグネトロン
7の冷却用のブロワ−ファン8を動作させると、前記吸
気部5から空気を吸い込み、加熱室10の底を通り、前
記吸い込み開口部6を介し、前記ブロワ−ファン8の吸
気部に入る。その後、マグネトロン7を冷却した冷却風
は前記ダクト9に沿って加熱室10内に入っていく。
When the blower fan 8 for cooling the magnetron 7 is operated during normal microwave operation, air is sucked from the suction section 5, passes through the bottom of the heating chamber 10, and passes through the suction opening 6. The air enters the suction section of the blower fan 8. Thereafter, the cooling air that has cooled the magnetron 7 enters the heating chamber 10 along the duct 9.

【0012】次に、図2について以下説明する。Next, FIG. 2 will be described below.

【0013】ダクト9の下側には、開口部15が設けら
れている。断熱材固定用のボックス12とダクト9の境
界部16には開口部16aが形成されている。また、ダ
クト9内には風路切換手段である可動ダンパ−17およ
びこの内部を通過する風の温度を検知する温度検知手段
としてサ−ミスタ19が設けられている。前記サ−ミス
タ19の信号は、コントロ−ル部4の制御部21に入力
される。次に、可動ダンパ−17の動作について以下説
明する。
An opening 15 is provided below the duct 9. An opening 16a is formed at a boundary 16 between the box 12 for fixing the heat insulating material and the duct 9. The duct 9 is provided with a movable damper 17 serving as an air passage switching means and a thermistor 19 as a temperature detecting means for detecting the temperature of the wind passing therethrough. The signal from the thermistor 19 is input to the control unit 21 of the control unit 4. Next, the operation of the movable damper 17 will be described below.

【0014】加熱室10内に熱風を発生させ循環させる
手段は、加熱室10内にヒ−タ35(図3)とファン
(図示せず)とを設け、ファンモ−タ34(図3)によ
ってファンを回転させることにより成る。熱風循環によ
る加熱時は、第2風路22を形成するため、風路切換手
段である可動ダンパ−17を図示の状態にする。その結
果、前記ブロワ−ファン8の冷却風は加熱室10に送ら
れず、前記開口部15を通過して、前記コントロ−ル部
4の周辺に送られて電子部品等を冷却する。マイクロ波
による加熱時は、前記風路切換手段である可動ダンパ−
17を前記開口部15を塞ぐ位置まで回転させ第1風路
21を形成する。前記可動ダンパ−17の回転は、可動
ダンパ−17の回転軸(図示せず)に取り付けられたギ
ア18を駆動させるためのステッピングモ−タ−(図示
せず)によって行う。
As means for generating and circulating hot air in the heating chamber 10, a heater 35 (FIG. 3) and a fan (not shown) are provided in the heating chamber 10, and a fan motor 34 (FIG. 3) is used. It consists of rotating a fan. At the time of heating by hot air circulation, the movable damper 17 which is the air path switching means is brought into the state shown in the figure to form the second air path 22. As a result, the cooling air from the blower fan 8 is not sent to the heating chamber 10 but passes through the opening 15 and is sent to the periphery of the control section 4 to cool electronic components and the like. At the time of heating by microwaves, a movable damper serving as the air path switching means is used.
17 is rotated to a position where the opening 15 is closed to form the first air passage 21. The rotation of the movable damper 17 is performed by a stepping motor (not shown) for driving a gear 18 attached to a rotating shaft (not shown) of the movable damper 17.

【0015】次に、熱風循環とマイクロ波による同時加
熱時の前記可動ダンパ−17の動作について説明する。
マイクロ波出力が大きく、あるいはマイクロ波出力があ
る程度続き、その結果、サ−ミスタ19による検知温度
が所定温度より高い場合(温度Ta以上)、可動ダンパ
−17を前記開口部15を塞ぐ位置まで回転させ、第1
風路21を形成する。そして、前記加熱室10の天面1
0aの前方に設けられているパンチング部20より冷却
風を前記加熱室10内に入れる。通常は、熱風循環時に
加熱室10内に風を入れるのは好ましくないが、風の温
度が所定温度より高い場合は、加熱室10内に風を入れ
る。加熱室10内に風を入れることにより、加熱室10
内の温度を高くすることができるので、ヒ−タ−35
(図3)の通電時間を短くすることができ、節電効果が
生じる。その理由は、加熱室10内の熱風温度は加熱室
10内に設けているサ−ミスタ46(図4)により検知
され、一定温度以上に上がらないように、前記ヒ−タ−
35はON/OFF制御されるからである。マイクロ波
出力が比較的小さい等の場合は、サ−ミスタ19による
風の検知温度が所定温度より低くなる。その場合は、加
熱室10内に風を送り込むと熱風温度が下がるので、加
熱室10内に風を送り込まない。可動ダンパ−17は図
示の状態になり、第2風路を形成する。その結果、前記
ブロワ−ファン8の冷却風は加熱室10に送られず、前
記開口部15から排気され、前記コントロ−ル部4の周
辺が冷却される。
Next, the operation of the movable damper 17 at the time of simultaneous heating with hot air circulation and microwaves will be described.
When the microwave output is large or the microwave output continues to some extent, as a result, when the temperature detected by the thermistor 19 is higher than a predetermined temperature (above the temperature Ta), the movable damper 17 is rotated to a position where the opening 15 is closed. Let the first
An air passage 21 is formed. And the top surface 1 of the heating chamber 10
Cooling air is introduced into the heating chamber 10 from a punching section 20 provided in front of the heating chamber 10a. Normally, it is not preferable to introduce air into the heating chamber 10 during circulation of hot air, but if the temperature of the air is higher than a predetermined temperature, the air is injected into the heating chamber 10. By blowing air into the heating chamber 10, the heating chamber 10
Since the inside temperature can be increased, the heater 35
The power supply time of FIG. 3 can be shortened, and a power saving effect occurs. The reason is that the temperature of the hot air in the heating chamber 10 is detected by a thermistor 46 (FIG. 4) provided in the heating chamber 10, and the heater is operated so as not to exceed a certain temperature.
This is because 35 is ON / OFF controlled. When the microwave output is relatively small, for example, the temperature of the wind detected by the thermistor 19 becomes lower than a predetermined temperature. In this case, when the air is blown into the heating chamber 10, the temperature of the hot air decreases, so that the wind is not blown into the heating chamber 10. The movable damper 17 is in the state shown in the figure, and forms a second air path. As a result, the cooling air from the blower fan 8 is not sent to the heating chamber 10 but is exhausted from the opening 15 and the periphery of the control section 4 is cooled.

【0016】熱風循環による加熱ムラをなくす為には、
熱風の循環方向を交互に変化させる必要がある。熱風循
環の回転方向を変化させることについて、図3、図4、
図5により以下説明する。
In order to eliminate heating unevenness due to hot air circulation,
It is necessary to alternately change the circulation direction of the hot air. Regarding changing the rotation direction of the hot air circulation, FIGS.
This will be described below with reference to FIG.

【0017】図3の1次側回路図について説明する。フ
ァン(図示せず)を回転させるためのファンモ−タ34
が設けられ、ファンモ−タ34の回転方向を変えるため
のファンモ−タ制御リレ−31の接点31aとファンモ
−タ制御リレ−32の接点32aとがファンモ−タ34
に対して並列に接続されている。前記ファンモ−タ34
は、比較的コストが安く堅牢なACインダクションモ−
タで、主巻線と補助巻線を変えることで回転方向を変え
ることができる。また、ヒ−タ35がヒ−タ35を制御
するヒ−タ制御リレ−33の接点33aを介して接続さ
れている。
The primary side circuit diagram of FIG. 3 will be described. Fan motor 34 for rotating a fan (not shown)
The contact point 31a of the fan motor control relay 31 for changing the rotation direction of the fan motor 34 and the contact point 32a of the fan motor control relay 32 are connected to the fan motor 34.
Are connected in parallel. The fan motor 34
Is a relatively inexpensive and robust AC induction mode.
The rotation direction can be changed by changing the main winding and the auxiliary winding. The heater 35 is connected via a contact point 33a of a heater control relay 33 for controlling the heater 35.

【0018】図4は、図3の回路の制御を行う回路図
で、以下この回路図について説明する。制御部36の出
力ポ−トP1、P2は、ファンモ−タ制御リレ−31、
32の駆動信号を出力する。また、出力ポ−トP3は、
ヒ−タ制御リレ−33の駆動信号を出力する。通常、フ
ァンモ−タ制御リレ−31をONするため、P1ポ−ト
にLow信号が出力される。そして、トランジスタ37
と38がONになる。その結果、ファンモ−タ制御リレ
−31の励磁コイル39に電流が流れ、ファンモ−タ3
4のファンモ−タ制御リレ−31の接点31aがONす
ることで、ファンモ−タ34に通電され、ファンモ−タ
34がCW(時計周り)方向に回転し、ファンが回転を
開始する。次に、一定時間経過後、P1ポ−トにHi信
号が出力され、上記トランジスタ37と38がOFF
し、ファンモ−タ制御リレ−31の接点31aがOFF
しファンモ−タ34は停止する。次に、P2ポ−トにL
ow信号が出力される。そして、トランジスタ40と4
1がONになる。その結果、ファンモ−タ制御リレ−3
2の励磁コイル42に電流が流れ、ファンモ−タ34の
制御リレ−32の接点32aがONすることで、ファン
モ−タ34に通電され、ファンモ−タ34がCW(反時
計周り)方向に回転し、ファンが回転を開始する。ま
た、一定時間経過後P2ポ−トにHi信号が出力され、
トランジスタ40と41がOFFし、ファンモ−タ制御
リレ−32の接点32aがOFFする。以後、前記動作
を繰り返しファンモ−タ34は交互に回転方向が変わ
り、熱風循環の方向が交互に変わり加熱ムラが生じな
い。
FIG. 4 is a circuit diagram for controlling the circuit of FIG. 3, and this circuit diagram will be described below. The output ports P1 and P2 of the control unit 36 are connected to a fan motor control relay 31,
32 drive signals are output. The output port P3 is
A drive signal for the heater control relay 33 is output. Normally, a Low signal is output to the P1 port to turn on the fan motor control relay 31. And the transistor 37
And 38 are turned ON. As a result, a current flows through the exciting coil 39 of the fan motor control relay 31 and the fan motor 3
When the contact 31a of the fan motor control relay 31 of No. 4 is turned on, the fan motor 34 is energized, the fan motor 34 rotates in the CW (clockwise) direction, and the fan starts rotating. Next, after a certain period of time, a Hi signal is output to the P1 port, and the transistors 37 and 38 are turned off.
And the contact 31a of the fan motor control relay 31 is turned off.
Then, the fan motor 34 stops. Next, L is added to the P2 port.
An ow signal is output. And transistors 40 and 4
1 turns ON. As a result, fan motor control relay-3
When the current flows through the excitation coil 42 of the second motor and the contact 32a of the control relay 32 of the fan motor 34 is turned on, the fan motor 34 is energized and the fan motor 34 rotates in the CW (counterclockwise) direction. Then, the fan starts rotating. After a lapse of a predetermined time, a Hi signal is output to the P2 port.
The transistors 40 and 41 are turned off, and the contact 32a of the fan motor control relay 32 is turned off. Thereafter, the above operation is repeated, and the rotation direction of the fan motor 34 changes alternately, and the direction of circulation of hot air changes alternately, so that uneven heating does not occur.

【0019】出力ポ−トP3は、ヒ−タ35の制御リレ
−33の駆動信号を出力する。サ−ミスタ46の検知温
度が所定温度に達するまでは、P3ポ−トにLow信号
が出力され、トランジスタ43と44ががONになり、
ヒ−タ制御リレ−33の励磁コイル45に電流が流れ、
ヒ−タ制御リレ−33の接点35がONすることで、ヒ
−タ35が通電される。また、サ−ミスタ46の検知温
度が所定温度に達すると、P3ポ−トにHi信号が出力
され、トランジスタ43と44がOFFしているので、
ヒ−タ制御リレ−33の励磁コイル45が通電されず、
ヒ−タ制御リレ−33の接点33aはOFFし、ヒ−タ
35は通電されない。
The output port P3 outputs a drive signal for the control relay 33 of the heater 35. Until the temperature detected by the thermistor 46 reaches a predetermined temperature, a Low signal is output to the P3 port, and the transistors 43 and 44 are turned on.
A current flows through the exciting coil 45 of the heater control relay 33,
When the contact point 35 of the heater control relay 33 is turned on, the heater 35 is energized. When the temperature detected by the thermistor 46 reaches a predetermined temperature, a Hi signal is output to the P3 port and the transistors 43 and 44 are turned off.
The excitation coil 45 of the heater control relay 33 is not energized,
The contact 33a of the heater control relay 33 is turned off, and the heater 35 is not energized.

【0020】図5に示す具体的制御を説明するタイミン
グチャ−トについて以下説明する。
A timing chart for explaining the specific control shown in FIG. 5 will be described below.

【0021】以下に述べる各制御リレ−については、上
記に説明しているので詳細ついては省略する。加熱室1
0内の熱風温度をA℃に設定して運転を開始したとす
る。サ−ミスタ46の検知温度がA℃に達するまでは、
ヒ−タ制御リレ−33をONにして、ヒ−タ35へ通電
して加熱室10内の温度を上げるとともに、ファンモ−
タ制御リレ−31をONにして、ファン(図示せず)を
CW(時計周り)方向で回転させる。サ−ミスタ46の
検知温度がA℃に達すると、ヒ−タ制御リレ−33をO
FFし、ヒ−タ35への通電をOFFする。ヒ−タ35
への通電をOFF後、オ−バシュ−トで、サ−ミスタ4
6の検知温度がA℃を越え、その後温度が下がり始め
る。ヒ−タ35がOFFしてから再び検知温度がA℃に
なると、ヒ−タ35へ通電する。OFFしてから再びA
℃になるまで、加熱室10の大きさ等にもよるが、1分
程度はかかる。そこで、OFFしてからT期間(一例:
ファンモ−タの回転が完全に停止する時間+α=約20
秒程度)後に、ファンモ−タ制御リレ−31をOFFし
て、ファンモ−タ制御リレ−32をONして、ファンを
CCW(反時計周り)方向で回転させる。以後、この動
作を繰り返すことで、ヒ−タ35のOFF時にタイミン
グよくファンモ−タ34の回転方向を変えることが可能
となる。
Each of the control relays described below has been described above, and will not be described in detail. Heating room 1
It is assumed that the operation is started with the hot air temperature in 0 set to A ° C. Until the temperature detected by the thermistor 46 reaches A ° C.
When the heater control relay 33 is turned on, the heater 35 is energized to increase the temperature in the heating chamber 10 and the fan motor
The control relay 31 is turned on, and the fan (not shown) is rotated in the CW (clockwise) direction. When the temperature detected by the thermistor 46 reaches A ° C., the heater control relay 33 is turned off.
FF is performed and the power supply to the heater 35 is turned off. Heater 35
After turning off the power to the thermistor 4
The detected temperature of 6 exceeds A ° C., and then the temperature starts to decrease. When the detected temperature reaches A ° C. again after the heater 35 is turned off, the heater 35 is energized. A after turning off
It takes about one minute until the temperature reaches ° C, depending on the size of the heating chamber 10 and the like. Therefore, after turning OFF, the period T (example:
Time when the rotation of the fan motor is completely stopped + α = about 20
After about (seconds), the fan motor control relay 31 is turned off, the fan motor control relay 32 is turned on, and the fan is rotated in the CCW (counterclockwise) direction. Thereafter, by repeating this operation, the rotation direction of the fan motor 34 can be changed with good timing when the heater 35 is turned off.

【0022】[0022]

【発明の効果】熱風循環加熱とマイクロ波加熱の同時加
熱時において、マグネトロン冷却後の冷却風を有効活用
する。
The cooling air after the magnetron cooling is effectively used during the simultaneous heating of the hot air circulation heating and the microwave heating.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の電子レンジの外装を切り欠いて右上方
から見た斜視図である。
FIG. 1 is a perspective view of a microwave oven according to the present invention, in which the exterior of the microwave oven is cut away and viewed from the upper right.

【図2】同電子レンジの要部斜視図である。FIG. 2 is a perspective view of a main part of the microwave oven.

【図3】熱風循環加熱の回路図である。FIG. 3 is a circuit diagram of hot air circulation heating.

【図4】熱風循環加熱の回路を制御する回路図である。FIG. 4 is a circuit diagram for controlling a circuit for circulating hot air.

【図5】熱風循環加熱時のタイムチャ−トである。FIG. 5 is a time chart at the time of hot air circulation heating.

【符号の説明】[Explanation of symbols]

2 ドア 4 コントロ−ル部 5 吸気部 6 吸い込み開口部 7 マグネトロン 8 ブロワ−ファン 9 ダクト 10 加熱室 12 ボックス 15 開口部 17 可動ダンパ− 19 サ−ミスタ 20 パンチング部 31 ファンモ−タ制御リレ− 32 ファンモ−タ制御リレ− 33 ヒ−タ制御リレ− 34 ファンモ−タ 35 ヒ−タ 36 制御部 2 Door 4 Control unit 5 Intake unit 6 Suction opening 7 Magnetron 8 Blower fan 9 Duct 10 Heating chamber 12 Box 15 Opening 17 Movable damper 19 Thermistor 20 Punching unit 31 Fan motor control relay 32 Fanmo -Controller relay 33 Heater control relay 34 Fan motor 35 Heater 36 Control unit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 外装と、この外装内に形成され前面に開
口を有し食品を収納する加熱室と、この加熱室の前面開
口を開閉するドアと、前記加熱室に熱風を発生させ循環
させる手段と、マイクロ波を供給する手段と、前記マイ
クロ波の発生源であるマグネトロンを冷却するブロワ−
ファンと、前記マグネトロンを冷却した冷却風を加熱室
に供給するダクトと、コントロ−ル部とを備えた電子レ
ンジにおいて、前記ダクトに、温度検知手段と、前記加
熱室へ送風する第1風路または前記加熱室へ送風しない
第2風路に切り換える風路切換手段とを設け、熱風とマ
イクロ波による同時加熱時のとき、前記温度検知手段に
よる検知温度に基づき、前記風路切換手段により前記い
ずれかの風路に切り換えることを特徴とする電子レン
ジ。
1. An exterior, a heating chamber formed in the exterior and having a front opening to store food, a door for opening and closing a front opening of the heating chamber, and generating and circulating hot air in the heating chamber. Means, means for supplying microwaves, and a blower for cooling a magnetron which is a source of the microwaves
In a microwave oven provided with a fan, a duct for supplying cooling air for cooling the magnetron to a heating chamber, and a control unit, a temperature detecting means is provided for the duct, and a first air passage for blowing air to the heating chamber. Alternatively, air path switching means for switching to a second air path that does not send air to the heating chamber is provided, and at the time of simultaneous heating with hot air and microwaves, the air path switching means based on the temperature detected by the temperature detection means. A microwave oven characterized by switching to a wind path.
【請求項2】 請求項1に記載の電子レンジにおいて、
熱風とマイクロ波による同時加熱時のとき、前記温度検
知手段による検知温度が所定値より高い場合は、前記風
路切換手段は前記加熱室へ送風する第1風路に切り換
り、前記温度検知手段による検知温度が所定値より低い
場合は、前記風路切換手段は前記加熱室へ送風しない第
2風路に切り換ることを特徴とする電子レンジ。
2. The microwave oven according to claim 1, wherein
At the time of simultaneous heating with hot air and microwaves, if the temperature detected by the temperature detecting means is higher than a predetermined value, the air path switching means switches to a first air path for blowing into the heating chamber, and the temperature detection is performed. If the temperature detected by the means is lower than a predetermined value, the air path switching means switches to a second air path which does not send air to the heating chamber.
JP2001178281A 2001-06-13 2001-06-13 Microwave oven Pending JP2002372245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001178281A JP2002372245A (en) 2001-06-13 2001-06-13 Microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001178281A JP2002372245A (en) 2001-06-13 2001-06-13 Microwave oven

Publications (1)

Publication Number Publication Date
JP2002372245A true JP2002372245A (en) 2002-12-26

Family

ID=19019005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001178281A Pending JP2002372245A (en) 2001-06-13 2001-06-13 Microwave oven

Country Status (1)

Country Link
JP (1) JP2002372245A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778700B1 (en) 2006-04-27 2007-11-22 주식회사 대우일렉트로닉스 Method for controlling damper of convection microwave oven
WO2022113998A1 (en) * 2020-11-26 2022-06-02 シャープ株式会社 Heating cooker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778700B1 (en) 2006-04-27 2007-11-22 주식회사 대우일렉트로닉스 Method for controlling damper of convection microwave oven
WO2022113998A1 (en) * 2020-11-26 2022-06-02 シャープ株式会社 Heating cooker

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