JPH0456089A - Microwave oven - Google Patents

Microwave oven

Info

Publication number
JPH0456089A
JPH0456089A JP16479990A JP16479990A JPH0456089A JP H0456089 A JPH0456089 A JP H0456089A JP 16479990 A JP16479990 A JP 16479990A JP 16479990 A JP16479990 A JP 16479990A JP H0456089 A JPH0456089 A JP H0456089A
Authority
JP
Japan
Prior art keywords
voltage
switching device
microwave oven
power
inverter
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.)
Granted
Application number
JP16479990A
Other languages
Japanese (ja)
Other versions
JP2607736B2 (en
Inventor
Hirohiko Muranaka
村奈嘉 宏彦
Shinichi Masuda
愼一 増田
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP2164799A priority Critical patent/JP2607736B2/en
Publication of JPH0456089A publication Critical patent/JPH0456089A/en
Application granted granted Critical
Publication of JP2607736B2 publication Critical patent/JP2607736B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Control Of High-Frequency Heating Circuits (AREA)
  • Electric Ovens (AREA)

Abstract

PURPOSE:To perform direct drive of a microwave oven by connecting multiple accumulators to an output terminal in series through an inverter at the time of operation, and while comprising a switching device for connecting the accumulators to an input terminal in parallel with each other at the time of charge. CONSTITUTION:At the time of operation, multiple accumulaters 4, 5 are connected in series by a switching device 12, and while since the accumulators 4-5, which are connected in series, are connected to an inverter 6 through an output terminal of the described switching device 12, the inverter 6 is driven by a high voltage and a low voltage to be operated with effective power conversion. At the time of charge of the described multiple accumulators 4, 5, the multiple accumulators 4, 5 are connected in parallel with each other by the switching device 12, and can be charged at a voltage lower than that of the operation time, and while the accumulators 4, 5, which are connected in parallel with each other, are connected to a direct power source 1 through an input terminal of the described switching device 12. The described multiple accumulators 4, 5 are charged at a low voltage.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

本発明は、直流Mlによって駆動する電子レンジに関す
る。
The present invention relates to a microwave oven driven by direct current Ml.

【従来の技術】[Conventional technology]

最近、自動車等が備える直流電源によって駆動できる電
子レンジが要望されている。 従来、この種の直流電源によって駆動する電子レンジと
しては、第4図に示すようなものがある。 この電子レンジは、インバータ回路24と高周波高圧ト
ランス25と半波倍電圧回路29とマグネトロン28か
らなる電子レンジ本体22と、上記インバータ回路24
に接続した電源コード23と、コネクタ23aを備えて
、このコネクタ23aに直流電源21(例えば自動車用
のバッテリーおよび自動車の発電機)を接続するように
している。」二足インバータ回路24は、高周波高圧ト
ランス25の一次巻線に接続している。」二組高周波高
圧トランス25の二次巻線は、コンデンサ26とダイオ
ード27からなる半波倍電圧回路29を介して、マグネ
トロン28に接続している。また、上記高周波高圧トラ
ンス25の別の二次巻線は、直接に、マグネトロン28
に接続している。 上記構成において、直流電源21は、コネクタ23aお
よび電源コード23を介して、直流電力をインバータ回
路24に供給する。上記インバータ回路24は、上記直
流電力を高周波交流電力に交換する。高周波高圧トラン
ス25は、上記高周波交流電力の電圧を昇圧して、上記
高周波交流電力を整流する半波倍電圧回路29を介して
マグネトロン28に直流電圧に印加すると共に、高周波
交流電圧を変圧してマグネトロン28に印加する。 すると、マグネトロン28は発振して、マイクロ波を発
生して、食品を加熱する。
Recently, there has been a demand for a microwave oven that can be driven by a DC power source provided in an automobile or the like. Conventionally, there is a microwave oven as shown in FIG. 4 which is driven by this type of DC power source. This microwave oven includes a microwave oven body 22 consisting of an inverter circuit 24, a high frequency high voltage transformer 25, a half wave voltage doubler circuit 29, and a magnetron 28, and the inverter circuit 24.
A power cord 23 and a connector 23a are provided, and a DC power source 21 (for example, an automobile battery and an automobile generator) is connected to the connector 23a. The two-legged inverter circuit 24 is connected to the primary winding of a high frequency high voltage transformer 25. The secondary windings of the two sets of high-frequency high-voltage transformers 25 are connected to the magnetron 28 via a half-wave voltage doubler circuit 29 consisting of a capacitor 26 and a diode 27. Further, another secondary winding of the high frequency high voltage transformer 25 is directly connected to the magnetron 28.
is connected to. In the above configuration, the DC power supply 21 supplies DC power to the inverter circuit 24 via the connector 23a and the power cord 23. The inverter circuit 24 exchanges the DC power into high frequency AC power. The high-frequency high-voltage transformer 25 boosts the voltage of the high-frequency AC power and applies it to the magnetron 28 as a DC voltage via a half-wave voltage doubler circuit 29 that rectifies the high-frequency AC power, and transforms the high-frequency AC voltage. The voltage is applied to the magnetron 28. Then, the magnetron 28 oscillates and generates microwaves to heat the food.

【発明が解決しようとする課題】[Problem to be solved by the invention]

ところで、直流電力を交流電力に変換するインバータ回
路は、通常、半導体を用いた回路で構成する。そして、
この回路には、2v程度の電圧ロスがあるので、インバ
ータ回路に入力する直流電力の電圧が高い程、インバー
タ回路の電力変換効率が向上する。 しかしながら、上記従来の電子レンジでは、インバータ
回路に、発生電圧が+2V程度のものが主流である自動
車用の発電機および自動車用のバッテリーの直流電圧を
印加するので、このインバータ回路での電圧ロスか、入
力端子の20%近くに達して、電力変換効率が悪いとい
う問題がある。 しかも、」−記イノバータ回路を低い電圧+2V程度で
駆動1.7でいるので、大きな入力電流(例えば50A
以上)が必要になって、コネクタや電源コードおよびス
イッチ類等を大型化しなければならず、電子レンジが高
価になるという問題がある。 そこで、本発明の目的は、電力変換効率が良好で普通の
コネクタや電源コードを使用できろ電子レンジを提供す
ることにある。
Incidentally, an inverter circuit that converts DC power into AC power is usually configured with a circuit using a semiconductor. and,
Since this circuit has a voltage loss of about 2V, the higher the voltage of the DC power input to the inverter circuit, the more the power conversion efficiency of the inverter circuit improves. However, in the above-mentioned conventional microwave oven, since the inverter circuit is applied with the DC voltage of an automobile generator and an automobile battery, which mainly generate a voltage of about +2V, voltage loss in this inverter circuit is caused. , which reaches nearly 20% of the input terminal, resulting in a problem of poor power conversion efficiency. Moreover, since the inverter circuit described in "-" is driven at a low voltage of about +2V, the input current is large (for example, 50A).
(above)), the connectors, power cords, switches, etc. must be made larger, and there is a problem that the microwave oven becomes expensive. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a microwave oven that has good power conversion efficiency and can use ordinary connectors and power cords.

【課題を解決するための手段】[Means to solve the problem]

一ト記目的を達成するため、本発明の電子レンジは、イ
ンバータを備えて、直流電源によって駆動する電子レン
ジにおいて、複数の蓄電池と、出力端子と入力端子を備
えて、運転時においては、上記蓄電池を直列に接続する
と共に、この直列に接続した蓄電池を出力端子に接続す
る一方、上記蓄電池の充電時においては、上記蓄電池を
並列に接続すると共に、この並列に接続した蓄電池を入
力端子に接続する切替装置を備えたことを特徴としてい
る。 また、上記蓄電池の過放電防止装置を備えることが望ま
しい。
In order to achieve the above objects, the microwave oven of the present invention is equipped with an inverter and is driven by a DC power source, and is equipped with a plurality of storage batteries, an output terminal and an input terminal, and during operation, the above-mentioned The storage batteries are connected in series, and the storage batteries connected in series are connected to the output terminal, while when charging the storage batteries, the storage batteries are connected in parallel, and the storage batteries connected in parallel are connected to the input terminal. It is characterized by being equipped with a switching device. Further, it is desirable to include an overdischarge prevention device for the storage battery.

【作用】[Effect]

運転時には、複数の蓄電池は、切替装置によって直列に
接続されると共に、この直列に接続された蓄電池は、上
記切替装置の出力端子を介して、インバータに接続され
るので、インバータは、高い電圧と小さい電流で駆動さ
れて電力変換効率か良い。 上記複数の蓄電池の充電時には、複数の蓄電池は、切替
装置によって並列に接続されて、運転時より低い電圧で
充電可能な状態になると共に、この並列に接続された蓄
電池は、上記切替装置の入力端子を介して、直流電源に
接続される。そして、」1記複数の蓄電池は低い電圧で
充電される。 上記蓄電池の過放電防止装置を備えた場合には、上記蓄
電池の過放電が防止される。
During operation, a plurality of storage batteries are connected in series by a switching device, and the storage batteries connected in series are connected to an inverter via the output terminal of the switching device, so that the inverter can switch between high voltage and high voltage. It is driven with a small current and has good power conversion efficiency. When charging the plurality of storage batteries, the plurality of storage batteries are connected in parallel by the switching device so that they can be charged at a lower voltage than during operation, and the storage batteries connected in parallel are connected to the input of the switching device. Connected to a DC power source via a terminal. Then, the plurality of storage batteries are charged at a low voltage. When the storage battery over-discharge prevention device is provided, over-discharge of the storage battery is prevented.

【実施例】【Example】

以下、本発明を図示の実施例により詳細に説明する。 第1図に示すように、本実施例の電子レンジは、インバ
ータ回路6と高周波高圧トランス7と半波倍電圧回路1
1とマグネトロン9と+2Vの蓄電池(以下、「バッテ
リー」という。)4.5と切替装置12と過放電防止装
置I3からなる電子レンジ本体2と、上記切替装置12
の入力端子12aに接続した電源コード3と、過放電防
止装置14と、コネクタ3aを備えて、このコネクタ3
aに、例えば自動車に搭載されて12Vの直流電圧を発
生ずるバッテリー等の直流電源1を接続して、この直流
電源1から上記バッテリー4.5を充電できるようにし
ている。上記切替装置12には、上記バッテリー4,5
を接続しており、切替装置12の出力端子+2bは過放
電防止装置13を介して、上記インバータ回路6に接続
している。上記切替装置は、図示しない複数のスイッチ
を備えて、第2.3図に示すように、バッテリー4.5
を直列または並列に接続して出力端子または入力端子に
接続できるようになっている。上記インバータ回路6は
高周波高圧トランス7の一次巻線に接続している。 上記高周波高圧トランス7の二次巻線は、コンデンサ8
とダイオード10からなる半波倍電圧回路11を介して
、マグネトロン9に接続している。 また、上記高周波高圧トランス7の別の二次巻線は、直
接に、マグネトロン9に接続している。 上記構成において、運転時には、第2図に示すように、
上記切替装置12は、入力端子12a、12aを開放状
態にして、バッテリー4,5を直流電源1と切り離すと
共に、上記バッテリー4.5を直列に接続して、この直
列に接続したバッテリー45を出力端子+2b、+2b
に接続している。すると、上記直列に接続したバッテリ
ー4,5は、出力端子12bおよび過放電防止装置13
を介して、インバータ回路6に24Vの直流電圧を供給
する。 したがって、上記バッテリー4.5が過放電するのを防
止できる。また、上記インバータ回路6の電力変換ロス
値は、上記インバータ回路6での電圧ロスの値2Vが、
上記インバータ回路6に人力する直流電圧値24Vに対
する割合すなわら略8%てあり、従来の如く12vの直
流電圧をインバータ回路に印加4−る場合の電力交換ロ
ス値すなわちインバータ回路での電圧ロス値2vが直流
電圧12Vに対する割合である17%に較へて、電力変
換ロス値が約9%低減できる。このように、上記インバ
ータ回路6は、効率良く直流電力を高周波交流電力に変
換する。そして、上記高周波高圧トランス7は、その二
次巻線によって、上記高周波交流電力を昇圧して、−V
層高周波交流電力を整流する半波倍電圧回路11を介し
て、マグネトロン9に直流電圧を印加すると共に、別の
二次巻線によって、上記高周波交流電圧を変圧してマグ
ネトロン9に印加する。すると、マグネトロン9は発振
してマイクロ波を発生して食品を加熱する。 −に記バッテリー4.5の充電時には、第3図に示すよ
うに、切替装置12は、出力端子12b、+2bを開放
状態にして、バッテリー4.5をインバータ回路6から
切り離すと共に、上記バッテリー4.5を並列に接続し
て、この並列に接続したバッテリー4,5を入力端子1
2a、12aに接続する。 すると、直流電源1は、コネクタ3aと過放電防止装置
14と電源コード3を介して、バッテリー4.5を12
v程度で充電できる。このとき、バッテリー4.5の充
電時の通電々流はIOA程度の小さい電流であるので、
コネクタ3aおよび電源コード3を特に大型のものにす
る必要がない。また、上記過放電防止装置14によって
、直流電源1の過放電を防止することができる。 尚、上記直流電源1は、例えば自動車に搭載されるバッ
テリーであり、一定の電気容量(例えば60AH)Lか
備えていないので、上記自動車のエンジンを回転させて
、発電機を直流電源1を充電しながら上記バッテリー4
.5を充電することが望ましい。 上記実施例では、バッテリー4.5を電子レンジ本体に
内蔵したが、電子レンジ本体の近傍に設けてもよい。
Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. As shown in FIG. 1, the microwave oven of this embodiment includes an inverter circuit 6, a high-frequency high-voltage transformer 7, and a half-wave voltage doubler circuit 1.
1, a magnetron 9, a +2V storage battery (hereinafter referred to as "battery") 4.5, a switching device 12, and an overdischarge prevention device I3;
This connector 3 is equipped with a power cord 3 connected to an input terminal 12a, an overdischarge prevention device 14, and a connector 3a.
A DC power source 1, such as a battery mounted on an automobile and generating a DC voltage of 12 V, is connected to a, so that the battery 4.5 can be charged from this DC power source 1. The switching device 12 includes the batteries 4 and 5.
The output terminal +2b of the switching device 12 is connected to the inverter circuit 6 via the overdischarge prevention device 13. The switching device includes a plurality of switches (not shown), and as shown in FIG.
can be connected in series or in parallel to the output or input terminals. The inverter circuit 6 is connected to the primary winding of a high frequency high voltage transformer 7. The secondary winding of the high frequency high voltage transformer 7 has a capacitor 8
It is connected to the magnetron 9 via a half-wave voltage doubler circuit 11 consisting of a diode 10 and a diode 10. Further, another secondary winding of the high frequency high voltage transformer 7 is directly connected to the magnetron 9. In the above configuration, during operation, as shown in Figure 2,
The switching device 12 opens the input terminals 12a and 12a to disconnect the batteries 4 and 5 from the DC power source 1, connects the batteries 4 and 5 in series, and outputs the battery 45 connected in series. Terminal +2b, +2b
is connected to. Then, the batteries 4 and 5 connected in series are connected to the output terminal 12b and the overdischarge prevention device 13.
A DC voltage of 24V is supplied to the inverter circuit 6 through the inverter circuit 6. Therefore, over-discharging of the battery 4.5 can be prevented. Further, the power conversion loss value of the inverter circuit 6 is such that the voltage loss value 2V in the inverter circuit 6 is
The percentage of the DC voltage value 24V manually applied to the inverter circuit 6 is approximately 8%, and the power exchange loss value when applying 12V DC voltage to the inverter circuit as in the conventional case, that is, the voltage loss in the inverter circuit. The power conversion loss value can be reduced by about 9% compared to 17%, which is the ratio of the value 2V to the DC voltage 12V. In this way, the inverter circuit 6 efficiently converts DC power into high frequency AC power. The high-frequency high-voltage transformer 7 boosts the high-frequency AC power through its secondary winding to -V
A DC voltage is applied to the magnetron 9 through a half-wave voltage doubler circuit 11 that rectifies the high-frequency AC power, and the high-frequency AC voltage is transformed and applied to the magnetron 9 by another secondary winding. Then, the magnetron 9 oscillates and generates microwaves to heat the food. - When charging battery 4.5, as shown in FIG. 3, switching device 12 opens output terminals 12b and +2b to disconnect battery 4.5 from inverter circuit 6, and .5 are connected in parallel, and the batteries 4 and 5 connected in parallel are connected to the input terminal 1.
Connect to 2a and 12a. Then, the DC power supply 1 connects the battery 4.5 to 12 through the connector 3a, the overdischarge prevention device 14, and the power cord 3.
It can be charged at about V. At this time, the current flowing when charging the battery 4.5 is a small current of about IOA, so
There is no need to make the connector 3a and the power cord 3 particularly large. Further, the overdischarge prevention device 14 can prevent overdischarge of the DC power supply 1. Note that the DC power source 1 is, for example, a battery installed in a car, and does not have a certain electric capacity (for example, 60 AH), so the DC power source 1 is charged by rotating the engine of the car. While the above battery 4
.. It is desirable to charge 5. In the above embodiment, the battery 4.5 is built into the microwave oven main body, but it may be provided near the microwave oven main body.

【発明の効果】【Effect of the invention】

以上の説明より明らかなように、本発明の電子レンジは
、運転時には、切替装置が複数の蓄電池を直列に接続す
るど共に、この直列に接続した蓄電池を一4二記切替装
置の出力端子を介してインバータに接続するので、特殊
で大型の直流電源装置を用いることなく、高い電圧と小
さな電流でインバータを駆動できて、インバータの電力
交換効率が良い。また、上記複数の蓄電池の充電時には
、上記切替装置が上記複数の蓄電池を並列に接続するの
で、普通の電源コードおよびコネクタを用いて、低い電
圧で上記複数の蓄電池を充電できる。 」−1記複数の蓄電池の過放電防止装置を備えた場合に
は、上記複数の蓄電池の過放電を防止できる。
As is clear from the above description, during operation of the microwave oven of the present invention, the switching device connects a plurality of storage batteries in series, and the storage batteries connected in series are connected to the output terminal of the switching device as described in 142. Since the inverter is connected to the inverter through the inverter, the inverter can be driven with high voltage and small current without using a special large DC power supply, and the inverter's power exchange efficiency is high. Further, when charging the plurality of storage batteries, the switching device connects the plurality of storage batteries in parallel, so that the plurality of storage batteries can be charged at a low voltage using an ordinary power cord and connector. ”-1 When the device is provided with an over-discharge prevention device for a plurality of storage batteries, over-discharge of the plurality of storage batteries can be prevented.

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

第1図は本発明の電子レンジの一実施例の回路図、第2
図は上記実施例の運転時の回路図、第3図は上記実施例
の充電時の回路図、第4図は従来の電子レンジの回路図
である。 1.21・・・直流電源、2.22・・・電子レンジ本
体、3.23・・電源コート、4.5・・・バッテリー
6.24・・・インバータ回路、 7.25 8,26・ I Q、27 If、29 ・高周波高圧トランス、 コンデンサ、9.28・・・マグネI・ロン、ダイオー
ド、 ・・半波倍電圧回路、12・・切替装置、・過放電防止
装置。
Fig. 1 is a circuit diagram of an embodiment of the microwave oven of the present invention;
FIG. 3 is a circuit diagram of the above embodiment during operation, FIG. 3 is a circuit diagram of the above embodiment during charging, and FIG. 4 is a circuit diagram of a conventional microwave oven. 1.21...DC power supply, 2.22...Microwave oven body, 3.23...Power coat, 4.5...Battery 6.24...Inverter circuit, 7.25 8,26. I Q, 27 If, 29 - High frequency high voltage transformer, capacitor, 9.28... Magne I Ron, diode, - Half wave voltage doubler circuit, 12... Switching device, - Over discharge prevention device.

Claims (2)

【特許請求の範囲】[Claims] (1)インバータを備えて、直流電源によって駆動する
電子レンジにおいて、 複数の蓄電池と、 出力端子と入力端子を備えて、運転時においては、上記
蓄電池を直列に接続すると共に、この直列に接続した蓄
電池を出力端子に接続する一方、上記蓄電池の充電時に
おいては、上記蓄電池を並列に接続すると共に、この並
列に接続した蓄電池を入力端子に接続する切替装置を備
えたことを特徴とする電子レンジ。
(1) A microwave oven equipped with an inverter and driven by a DC power source, which is equipped with a plurality of storage batteries, an output terminal and an input terminal, and which is connected in series with the storage batteries during operation; A microwave oven comprising a switching device that connects a storage battery to an output terminal, connects the storage batteries in parallel when charging the storage battery, and connects the parallel-connected storage batteries to an input terminal. .
(2)請求項1に記載の電子レンジにおいて、上記蓄電
池の過放電防止装置を備えた電子レンジ。
(2) The microwave oven according to claim 1, further comprising an overdischarge prevention device for the storage battery.
JP2164799A 1990-06-22 1990-06-22 Automotive microwave oven Expired - Fee Related JP2607736B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2164799A JP2607736B2 (en) 1990-06-22 1990-06-22 Automotive microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2164799A JP2607736B2 (en) 1990-06-22 1990-06-22 Automotive microwave oven

Publications (2)

Publication Number Publication Date
JPH0456089A true JPH0456089A (en) 1992-02-24
JP2607736B2 JP2607736B2 (en) 1997-05-07

Family

ID=15800155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2164799A Expired - Fee Related JP2607736B2 (en) 1990-06-22 1990-06-22 Automotive microwave oven

Country Status (1)

Country Link
JP (1) JP2607736B2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5074836A (en) * 1973-11-08 1975-06-19
JPS60236490A (en) * 1984-05-09 1985-11-25 松下電器産業株式会社 High frequency heating device
JPS61185887A (en) * 1985-02-13 1986-08-19 株式会社デンソー Electronic oven range for automobile
JPS61153992U (en) * 1985-03-15 1986-09-24

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5074836A (en) * 1973-11-08 1975-06-19
JPS60236490A (en) * 1984-05-09 1985-11-25 松下電器産業株式会社 High frequency heating device
JPS61185887A (en) * 1985-02-13 1986-08-19 株式会社デンソー Electronic oven range for automobile
JPS61153992U (en) * 1985-03-15 1986-09-24

Also Published As

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