JPH01190398A - Micro-wave drying equipment - Google Patents

Micro-wave drying equipment

Info

Publication number
JPH01190398A
JPH01190398A JP63014914A JP1491488A JPH01190398A JP H01190398 A JPH01190398 A JP H01190398A JP 63014914 A JP63014914 A JP 63014914A JP 1491488 A JP1491488 A JP 1491488A JP H01190398 A JPH01190398 A JP H01190398A
Authority
JP
Japan
Prior art keywords
clothes
drying chamber
high frequency
magnetron
drying
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
JP63014914A
Other languages
Japanese (ja)
Other versions
JP2650295B2 (en
Inventor
Ayumi Kiritooshi
切通 歩
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP63014914A priority Critical patent/JP2650295B2/en
Publication of JPH01190398A publication Critical patent/JPH01190398A/en
Application granted granted Critical
Publication of JP2650295B2 publication Critical patent/JP2650295B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce a period of time for drying clothes by applying a magnetron, and to prevent electric discharges and scorches by breaking the electric supply circuit for the magnetron when ultrasonic microphones detect the presence of metals. CONSTITUTION:Clothes in a drying chamber are efficiently dried with high frequency waves transmitted by a magnetron 3. High frequency waves transmitted by a transmitter of high frequency ceramic microphone 8 travels through objects such as clothes in the drying chamber 1. While a part of the high frequency waves is absorbed, the other part is reflected by an external casing 2 of the drying chamber 1 and transmitted to the receiver of high frequency ceramic microphone 9. Since the reflection in case the waves travel through the objects consisting only of wet clothes to be dried is different from that in case they travel through the objects containing metals, there occurs some differences in high frequency wave signals to be received. Those data of differences are processed in a data processor 10, and when a metal is detected, a controller 11 shuts off the electric supply circuit for the magnetron 3 which transmits high frequency waves to the drying chamber 1.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、電気を加熱乾燥の熱源とした衣類乾燥機にお
いて、乾燥時間を短縮するために、マグネトロンが発生
するマイクロ波である高周波電波を熱源に利用した家庭
用衣類乾燥機である高周波乾燥装置に関するものである
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a clothes dryer that uses electricity as the heat source for heating and drying.In order to shorten the drying time, the present invention uses high-frequency radio waves, which are microwaves generated by a magnetron, as the heat source. This article relates to a high-frequency drying device, which is a household clothes dryer.

従来の技術 従来の家庭用衣類乾燥機は、乾燥室を形成する回転ドラ
ムの中に、PTCヒータ、シーズヒータ等の電気ヒータ
を熱源とした熱風を送り込み、この熱風を乾燥室内で循
環させることにより衣類を電気ヒータを熱源とした熱風
を利用した家庭用の衣類乾燥機は、電気ヒータが高温に
立上るまでの時間を必要とする。又部められた熱風が乾
燥室内及び被乾燥物である衣類を一定の高温まで加熱し
ていくことにも時間を必要とする。このためこの電気ヒ
ータを熱源とした衣類乾燥機は、衣類が乾燥するまでに
長時間を要すると云う欠点があった。
Conventional technology A conventional household clothes dryer sends hot air using an electric heater such as a PTC heater or a sheathed heater as a heat source into a rotating drum that forms a drying chamber, and circulates this hot air within the drying chamber. Home clothes dryers that use hot air to dry clothes using an electric heater as a heat source require time for the electric heater to reach a high temperature. It also takes time for the heated air to heat the drying chamber and the clothes to be dried to a certain high temperature. For this reason, clothes dryers using this electric heater as a heat source have the disadvantage that it takes a long time to dry clothes.

この乾燥時間を短縮する手段として、マグネトロンが発
生するマイクロ波である高周波電波を利用する手段が考
えられる。マイクロ波である高周波電波を熱源として被
乾燥物である衣類に供給すると、高周波電波は衣類を直
接加熱する。即ち高周波電波のエネルギーが衣類及びそ
の含んでいる水分の熱エネルギーとして変換される。こ
のため衣類の乾燥時間は大きく短縮される。
As a means to shorten this drying time, it is possible to use high-frequency radio waves, which are microwaves generated by a magnetron. When high-frequency radio waves, which are microwaves, are supplied as a heat source to clothes, which are items to be dried, the high-frequency radio waves directly heat the clothes. That is, the energy of the high frequency radio waves is converted into thermal energy of the clothing and the moisture it contains. Therefore, the drying time of clothes is greatly shortened.

マイクロ波である高周波電波は交番電界のもっエネルギ
ーを伝達するものである。交番電界内に金属物があれば
、金属に電界が誘導され、金属間で放電を起したり、金
属物の端末で更に強い電界を誘起するなどの現象を発生
する。衣類、水分等の誘電体であれば、誘電体損失でこ
れに吸収され熱エネルギーに変換される。衣類乾燥物に
は金属物が使用されている場合がある。マイクロ波であ
る高周波電波を利用した衣類乾燥機の場合、衣類乾燥物
に金属が使用されていると、この金属物によって放電し
たり、金属物の端面で衣類が焦げる本発明は、家庭用衣
類乾燥機の乾燥時間を短縮するために、マグネトロンを
用い、マグネトロンから発生するマイクロ波である高周
波電波を加熱の熱源とし、その高周波電界によって被乾
燥物の衣類を直接加熱乾燥させるものである。衣類乾燥
物に含まれる金属物は、高周波電波の乾燥時には不具合
である。これを防止するために、超音波マイクロホンを
用い、この超音波によって金属物を検出し、乾燥室への
高周波電波の給電を遮断する。
High-frequency radio waves, which are microwaves, transmit the energy of alternating electric fields. If there is a metal object within an alternating electric field, an electric field is induced in the metal, causing phenomena such as causing discharge between the metals or inducing a stronger electric field at the ends of the metal object. If it is a dielectric material such as clothing or moisture, it is absorbed by the dielectric material due to dielectric loss and converted into thermal energy. Metal objects may be used for drying clothes. In the case of a clothes dryer that uses high-frequency radio waves (microwaves), if metal is used to dry the clothes, electrical discharge may occur due to the metal object, and the clothes may be burnt on the edge of the metal object. In order to shorten the drying time of a dryer, a magnetron is used, and high-frequency radio waves, which are microwaves, generated by the magnetron are used as a heat source, and the high-frequency electric field directly heats and dries the clothes to be dried. Metal objects contained in dried clothes are a problem when drying with high frequency radio waves. To prevent this, an ultrasonic microphone is used to detect metal objects using the ultrasonic waves, and the supply of high-frequency radio waves to the drying chamber is cut off.

マイクロ波である高周波電波を衣類乾燥機に利用するこ
とを可能なものにする。
To make it possible to utilize high frequency radio waves, which are microwaves, in a clothes dryer.

作   用 乾燥室に高周波電波を給電すると、そこにある衣類乾燥
物は水分も含めて誘電体であるので誘電体損失によって
自己発熱する。加熱によって生じた水蒸気を乾燥室外へ
排出すれば、衣類は短時間で乾燥される。
Function: When high-frequency radio waves are supplied to the drying chamber, the drying clothes there, including moisture, are dielectric, so they self-heat due to dielectric loss. If the water vapor generated by heating is discharged outside the drying chamber, the clothes can be dried in a short time.

超音波マイクロホンは、超音波を送信もし受信もする素
子である。超音波は物質によって伝播の状況が変る。密
度の低い衣類や水分と密度の高い金属では伝播の状態が
変化し、金属の境面にきた超音波のエネルギーは一部吸
収され、他は反射されてしまう。この超音波の伝播の変
化によって金属物を検知すれば、乾燥室に金属物がある
場合、高周波電波の給電を遮断することができる。マイ
クロ波である高周波電波を利用した衣類乾燥機である高
周波乾燥装置が得られる。
An ultrasonic microphone is an element that both transmits and receives ultrasonic waves. The propagation conditions of ultrasonic waves change depending on the material. The propagation conditions change between low-density clothing or moisture and high-density metals, and some of the energy of the ultrasound that reaches the metal interface is absorbed, while the rest is reflected. If a metal object is detected based on a change in the propagation of the ultrasonic waves, if there is a metal object in the drying chamber, the power supply of high-frequency radio waves can be interrupted. A high-frequency drying device, which is a clothes dryer, using high-frequency radio waves such as microwaves can be obtained.

実施例 以下図面に従い本発明の一実施例を説明する。Example An embodiment of the present invention will be described below with reference to the drawings.

第1図において、1は衣類を入れ高周波乾燥を行う乾燥
室、2は乾燥室1を構成する乾燥室外体で、乾燥室1に
給電されたマイクロ波である高周波電波を乾燥室1外へ
漏洩させない役割を果し、金属の薄板で構成される。3
は乾燥室1へ高周波電波を給電する高周波発振源である
マグネトロン、4はマグネトロン3から発振された高周
波電波を乾燥室1へ伝送給電する導波管、5は乾燥室1
へ衣類を出し入れする扉である。扉5と乾燥室外体2と
の間の構成は、高周波電波を乾燥室1に給電しての乾燥
中高周波電波がそこから漏洩しないようなものとしであ
る。6は乾燥室外体2の側壁に回転軸をもつ乾燥室1内
に設けられた回転ドラムで、乾燥の効率を上げるため被
乾燥物である衣類を回転させる。回転ドラム6は高周波
電波の電界内にあるので、ポリプロピレンなど高周波損
失の少ない樹脂材料で構成される。7は回転ドラム6を
回転駆動するための駆動モータである。
In Fig. 1, 1 is a drying chamber in which clothes are placed and subjected to high-frequency drying, and 2 is an external body of the drying chamber configuring the drying chamber 1, which leaks high-frequency radio waves, which are microwaves, supplied to the drying chamber 1 to the outside of the drying chamber 1. It is made of a thin metal plate. 3
4 is a magnetron which is a high-frequency oscillation source that supplies high-frequency radio waves to the drying chamber 1; 4 is a waveguide that transmits and supplies high-frequency radio waves oscillated from the magnetron 3 to the drying chamber 1; 5 is a waveguide that supplies power to the drying chamber 1;
This is the door for taking clothes in and out. The structure between the door 5 and the drying chamber outer body 2 is such that high frequency radio waves are supplied to the drying chamber 1 so that the high frequency radio waves do not leak therefrom during drying. Reference numeral 6 denotes a rotating drum provided in the drying chamber 1, which has a rotating shaft on the side wall of the drying chamber outer body 2, and rotates the clothes to be dried in order to increase drying efficiency. Since the rotating drum 6 is within the electric field of high-frequency radio waves, it is made of a resin material with little high-frequency loss, such as polypropylene. 7 is a drive motor for rotationally driving the rotating drum 6.

このようなもので基本部分を構成した本発明の高周波乾
燥装置であれば、乾燥室1内にある水分を含んだ衣類に
マグネトロン3から発振されたマイクロ波の高周波電波
が給電される。誘電体である衣類、水分が高周波電波の
交番電界内にあれば、誘電体損失で高周波電波のエネル
ギーがこれに吸収され熱エネルギーに変換される。従来
の熱風式と異り、被乾燥物である衣類と水分に直接即時
熱が加えられることになり、乾燥時間が大きく短縮され
る。回転ドラム6内の衣類は乾燥中駆動モータ7で回転
させられる。これは衣類が均一に高周波電波の電界中に
置かれることになり乾燥むらを防ぐ役割を果すとともに
、衣類から発生した水蒸気を広い表面から排出させる効
果もあり結果的に乾燥時間を短縮させることになる。
In the high-frequency drying apparatus of the present invention, the basic part of which is constituted by such a device, high-frequency microwave radio waves oscillated from the magnetron 3 are supplied to moisture-containing clothes in the drying chamber 1. If clothing or moisture, which is a dielectric material, is within the alternating electric field of high-frequency radio waves, the energy of the high-frequency radio waves is absorbed by the dielectric loss and converted into thermal energy. Unlike conventional hot air methods, instant heat is applied directly to the clothes and moisture to be dried, greatly shortening drying time. The clothes in the rotating drum 6 are rotated by a drive motor 7 during drying. This not only prevents uneven drying by placing the clothes evenly in the electric field of high-frequency radio waves, but also has the effect of discharging the water vapor generated from the clothes from a wide surface, which ultimately shortens the drying time. Become.

8と9が送信用超音波セラミックマイクロホンと受信用
超音波セラミックマイクロホンで、乾燥室1外で乾燥室
1内に超音波を伝播できる位置に設けられている。超音
波セラミックマイクロホンは、振動子として圧電磁器を
用いた空中超音波の送信、受信を行う超音波トランスデ
ユーサ−である。10は送信用超音波セラミックマイク
ロホン8が乾燥室1内へ超音波を送信するための送信回
路と、乾燥室1内の超音波信号を検知する受信用超音波
セラミックマイクロホン9からの情報を得て処理する受
信回路、信号処理回路を含む信号処理部である。11は
信号処理部10から送られてきた制御信号を受け、マグ
ネトロン3の発振と停止、その他の動作を制御する制御
回路である。超音波の送信回路と受信回路の例を第2図
と第3図に示す。第2図が送信回路で、発振回路をもっ
て送信用超音波セラミックマイクロホン8から超音波を
送信する。第3図は受信回路で、超音波信号を受信用超
音波セラミックマイクロホン9で受信し、情報として処
理し制御信号にして伝送する。
Reference numerals 8 and 9 denote a transmitting ultrasonic ceramic microphone and a receiving ultrasonic ceramic microphone, which are provided outside the drying chamber 1 at positions where ultrasonic waves can be propagated into the drying chamber 1. An ultrasonic ceramic microphone is an ultrasonic transducer that uses a piezoelectric ceramic as a vibrator to transmit and receive airborne ultrasonic waves. Reference numeral 10 indicates a transmission circuit for the transmitting ultrasonic ceramic microphone 8 to transmit ultrasonic waves into the drying chamber 1, and a receiving ultrasonic ceramic microphone 9 for detecting the ultrasonic signal inside the drying chamber 1. This is a signal processing section that includes a receiving circuit and a signal processing circuit for processing. Reference numeral 11 denotes a control circuit that receives control signals sent from the signal processing section 10 and controls oscillation and stopping of the magnetron 3 and other operations. Examples of ultrasonic transmitting circuits and receiving circuits are shown in FIGS. 2 and 3. FIG. 2 shows a transmitting circuit, which uses an oscillation circuit to transmit ultrasonic waves from the transmitting ultrasonic ceramic microphone 8. FIG. 3 shows a receiving circuit in which an ultrasonic signal is received by a receiving ultrasonic ceramic microphone 9, processed as information, and transmitted as a control signal.

この送信回路、受信回路が信号処理部10に含まれ、乾
燥室1へ超音波を送信するための発振信号を送るととも
に、受信された超音波信号の情報を処理し、制御信号と
して制御回路11へ伝送する。
The transmitting circuit and the receiving circuit are included in the signal processing section 10, which sends an oscillation signal for transmitting ultrasonic waves to the drying chamber 1, and processes information on the received ultrasonic signal as a control signal to the control circuit 11. Transmit to.

制御回路11は制御信号に従い、マグネトロン3に発振
と停止、その他の動作を行わせる。
The control circuit 11 causes the magnetron 3 to oscillate, stop, and perform other operations in accordance with the control signal.

このようなもので構成される本発明実施例の高周波乾燥
装置であれば、マグネトロン3より発生した高周波電波
で乾燥室1の衣類は効率よく加熱乾燥される。送信用超
音波セラミックマイクロホン8から超音波を送信し、乾
燥室1内の衣類などの媒質中を伝播させる。超音波は一
部は吸収されるが他の部分は乾燥室外体2で反射され、
受信用超音波セラミックマイクロホン9へ伝播されてく
る。この超音波信号が乾燥室1内の状況を知らせる情報
となる。超音波は音波の伝播速度が媒質の性質に左右さ
れ、密度の高い媒質中では、密度の低い媒質中よりも音
波はゆっくりと伝播し、また弾性の大きい媒質中では、
弾性の小さい媒質中よりも速く伝播する。このほか、超
音波が伝播する過程で、2つの相異なる媒質、たとえば
空気と水、あるいは空気と金属などの境界にきた場合、
音のエネルギーの一部分は、強さは衰えているが同じ超
音波の形のま\他の媒質中には入り、他の部分は反射さ
れてしまう。超音波は、固体から固体へ、液体から液体
へ、また気体から気体へと、最もよく通過する。液体か
ら固体、したがって固体から液体への通過はかなり悪く
なり、気体から液体へ、あるいは固体へ、またその逆に
いたっては、まったく悪くなる。
In the high-frequency drying apparatus of the embodiment of the present invention constructed as described above, the clothes in the drying chamber 1 can be efficiently heated and dried using the high-frequency radio waves generated by the magnetron 3. Ultrasonic waves are transmitted from the transmitting ultrasonic ceramic microphone 8 and propagated through a medium such as clothing in the drying chamber 1. A part of the ultrasonic wave is absorbed, but the other part is reflected by the drying chamber external body 2,
The waves are propagated to the receiving ultrasonic ceramic microphone 9. This ultrasonic signal becomes information that informs the situation inside the drying chamber 1. In ultrasonic waves, the propagation speed of sound waves depends on the properties of the medium; sound waves propagate more slowly in a medium with high density than in a medium with low density, and in a medium with high elasticity,
Propagates faster than in a less elastic medium. In addition, when an ultrasonic wave comes to a boundary between two different media, such as air and water, or air and metal, during the propagation process,
A portion of the sound energy enters other media in the form of ultrasonic waves, although the intensity is decreasing, and the other portion is reflected. Ultrasound travels best from solid to solid, liquid to liquid, and gas to gas. The passage from liquid to solid and thus from solid to liquid is much worse, and from gas to liquid or solid and vice versa it is quite bad.

このような超音波の性質から、送信用超音波セラミック
マイクロホン8より送信された超音波は、乾燥室1内の
衣類など被乾燥物の媒質としての違いにより、受信用セ
ラミックマイクロホン9に受信されるまでに様々の変化
を受ける。被乾燥物が水分を含んだ衣類丈の場合と、内
部に金属物をもった場合とでは反射に差があり、受信さ
れる超音波信号に差が生ずる。これを情報源として処理
すれば、金属物を検知することができ、乾燥室1への高
周波電波の給電を遮断することができる。衣類乾燥物に
含まれる金属物は、高周波電波による乾燥時には不具合
であるが、これを防止することができる。
Due to the properties of such ultrasonic waves, the ultrasonic waves transmitted from the transmitting ultrasonic ceramic microphone 8 are received by the receiving ceramic microphone 9 due to the difference in the medium of the object to be dried, such as clothes, in the drying chamber 1. undergoes various changes. There is a difference in reflection between when the object to be dried is a piece of clothing containing moisture and when there is a metal object inside, resulting in a difference in the received ultrasonic signals. If this is processed as an information source, metal objects can be detected and the supply of high frequency radio waves to the drying chamber 1 can be interrupted. Metal objects contained in dried clothes are a problem when dried using high frequency radio waves, but this can be prevented.

発明の効果 このような本発明の構成であれば、家庭用の衣類乾燥機
の熱源としてマイクロ波である高周波電波が利用でき、
衣類を熱風によってではなく衣類の自己発熱によって直
接加熱乾燥されるので、効率的に短縮された時間で乾燥
される高周波乾燥装置が得られる。衣類乾燥物の中に含
まれる金属類は、超音波マイクロホンで検出され乾燥室
への高周波電波給電を遮断するので、高周波電波電界中
での不具合な面が防止され、安全なものが得られる。
Effects of the Invention With the configuration of the present invention, high-frequency radio waves, which are microwaves, can be used as a heat source for household clothes dryers.
Since the clothes are directly heated and dried not by hot air but by the self-heating of the clothes, a high frequency drying device can be obtained which efficiently dries the clothes in a shortened time. Metals contained in the dried clothes are detected by an ultrasonic microphone and the high frequency radio wave power supply to the drying chamber is cut off, thereby preventing problems in the high frequency radio field and producing safe clothes.

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

第1図は本発明の一実施例を示す高周波乾燥機の縦断面
図、第2図、第3図は同機に用いる超音波セラミックマ
イクロホンの送信回路と受信回路の回路図である。 1・・・・・・乾燥室、2・・・・・乾燥室外体、3・
・・・マグネトロン、8・・・・・送信用超音波セラミ
ックマイクロホン、9・・・・受信用超音波セラミック
マイクロホン。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名l−
乾凍呈 2−乾繰呈外体 3・・−マ/jネトロン 8.2−  マイクロホン 第1図 第2図 第 3r1!J
FIG. 1 is a longitudinal sectional view of a high frequency dryer showing an embodiment of the present invention, and FIGS. 2 and 3 are circuit diagrams of a transmitting circuit and a receiving circuit of an ultrasonic ceramic microphone used in the same device. 1...Drying chamber, 2...Drying chamber outer body, 3.
... Magnetron, 8... Ultrasonic ceramic microphone for transmitting, 9... Ultrasonic ceramic microphone for receiving. Name of agent: Patent attorney Toshio Nakao and one other person
Freezing 2 - Drying outer body 3... - Ma/j Netron 8.2 - Microphone Figure 1 Figure 2 Figure 3r1! J

Claims (1)

【特許請求の範囲】[Claims]  乾燥室に高周波電波を給電するマグネトロンと、乾燥
室にある被乾燥物を検知する超音波マイクロホンとを備
え、前記マグネトロンへ供給される電源を前記超音波マ
イクロホンの検知信号で開閉動作させる高周波乾燥装置
A high-frequency drying device that includes a magnetron that supplies high-frequency radio waves to a drying chamber and an ultrasonic microphone that detects objects to be dried in the drying chamber, and that opens and closes power supplied to the magnetron using a detection signal from the ultrasonic microphone. .
JP63014914A 1988-01-26 1988-01-26 Induction dryer Expired - Lifetime JP2650295B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63014914A JP2650295B2 (en) 1988-01-26 1988-01-26 Induction dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63014914A JP2650295B2 (en) 1988-01-26 1988-01-26 Induction dryer

Publications (2)

Publication Number Publication Date
JPH01190398A true JPH01190398A (en) 1989-07-31
JP2650295B2 JP2650295B2 (en) 1997-09-03

Family

ID=11874234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63014914A Expired - Lifetime JP2650295B2 (en) 1988-01-26 1988-01-26 Induction dryer

Country Status (1)

Country Link
JP (1) JP2650295B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714962A1 (en) * 1994-01-12 1995-07-13 Raffin De Francois Laundry dryer
KR20000067557A (en) * 1999-04-29 2000-11-25 구자홍 Drying washing machine
US7525074B2 (en) * 2006-05-31 2009-04-28 International Business Machines Corporation Method and apparatus for detecting metal placed within a microwave oven
CN104711819A (en) * 2013-12-13 2015-06-17 海尔集团公司 Washing machine with metal detector and control method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60232428A (en) * 1984-05-02 1985-11-19 Matsushita Electric Ind Co Ltd Heat-cooking device
JPS6188486A (en) * 1984-10-05 1986-05-06 株式会社日立ホームテック High frequency heater with wireless temperature probe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60232428A (en) * 1984-05-02 1985-11-19 Matsushita Electric Ind Co Ltd Heat-cooking device
JPS6188486A (en) * 1984-10-05 1986-05-06 株式会社日立ホームテック High frequency heater with wireless temperature probe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714962A1 (en) * 1994-01-12 1995-07-13 Raffin De Francois Laundry dryer
KR20000067557A (en) * 1999-04-29 2000-11-25 구자홍 Drying washing machine
US7525074B2 (en) * 2006-05-31 2009-04-28 International Business Machines Corporation Method and apparatus for detecting metal placed within a microwave oven
CN104711819A (en) * 2013-12-13 2015-06-17 海尔集团公司 Washing machine with metal detector and control method thereof

Also Published As

Publication number Publication date
JP2650295B2 (en) 1997-09-03

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