KR960011265A - Microwave Oven - Google Patents

Microwave Oven Download PDF

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Publication number
KR960011265A
KR960011265A KR1019940022130A KR19940022130A KR960011265A KR 960011265 A KR960011265 A KR 960011265A KR 1019940022130 A KR1019940022130 A KR 1019940022130A KR 19940022130 A KR19940022130 A KR 19940022130A KR 960011265 A KR960011265 A KR 960011265A
Authority
KR
South Korea
Prior art keywords
power
power relay
relay
microwave oven
unit
Prior art date
Application number
KR1019940022130A
Other languages
Korean (ko)
Other versions
KR0139737B1 (en
Inventor
강대병
Original Assignee
이헌조
엘지전자 주식회사
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.)
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Publication date
Application filed by 이헌조, 엘지전자 주식회사 filed Critical 이헌조
Priority to KR1019940022130A priority Critical patent/KR0139737B1/en
Publication of KR960011265A publication Critical patent/KR960011265A/en
Application granted granted Critical
Publication of KR0139737B1 publication Critical patent/KR0139737B1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/666—Safety circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

본 발명은 전자레인지 보호장치에 관한 것으로, 종래에는 고압트랜스를 제어하는 파워릴레이의 단품별, 입력전압별 동작시간의 편차를 산출하지 못함으로써 고압트랜스 초기구동시 발생하는 돌입전류를 감쇄 혹은 제거시키지 못하여 상기 돌입전류가 파워릴레이의 접점에 그대로 인가됨으로서 파워릴레이의 접점에 상당한 손상을 주고 그에따라 접점이 용착될 확률도 상대적으로 높게된다. 또한 파워릴레이가 용착되었을 때 전장부에서 추가적인 보완책이 없어서 사용자가 원하지 않는 경우에도 전자레인지가 동작하게 되어 불완전한 상태가 발생할 수 있는 등의 문제점이 있었다. 따라서 본 발명은 과도 돌입전류가 최소인 지점에서 파워릴레이의 접점을 온시킴으로써 접점의 손상을 방지하고 그에따른 릴레이 용착을 방지하도록 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven protection device. In the related art, it is possible to attenuate or eliminate an inrush current generated during initial operation of a high voltage transformer by failing to calculate a deviation of an operation time of a power relay controlling a high voltage transformer for each unit or input voltage. In this case, the inrush current is applied to the contacts of the power relay as it is, which causes considerable damage to the contacts of the power relay, and accordingly, the probability of welding the contacts is relatively high. In addition, when the power relay is welded, there is a problem that an incomplete state may occur because the microwave oven operates even if the user does not want it because there is no supplementary measure in the electronic device. Therefore, the present invention prevents damage to the contact and consequently relay welding by turning on the contact of the power relay at the point where the transient inrush current is minimum.

Description

전자레인지 보호장치Microwave Oven

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명의 전자레인지 보호장치 회로도.3 is a circuit diagram of a microwave protection device of the present invention.

제4도는 제3도에서 정상상태일때 제어부의 입출력 파형도.4 is an input / output waveform diagram of a control unit in a normal state in FIG. 3.

제5도는 제3도에서 파워릴레이 용착시 제어부의 입출력 파형도.FIG. 5 is an input / output waveform diagram of a control unit when the power relay is welded in FIG.

제6도는 제3도에서 고압트랜스의 초기전압, 전류 및 제어부의 인터럽트 파형도.6 is an interrupt waveform diagram of an initial voltage, a current, and a controller of a high voltage transformer in FIG.

제7도는 제3도에서 파워릴레이 용착시의 제어흐름도.FIG. 7 is a control flowchart of power relay welding in FIG.

제8도는 제3도에서 파워릴레이 온타임시간 설정흐름도.8 is a flow chart of power relay on time setting in FIG.

Claims (3)

전자레인지의 전체동작을 제어하는 마이크로컴퓨터 콘트롤러에 전원을 공급하는 전원공급부(11)와, 제어출력에 따라 전자레인지의 파워릴레이를 구동시키기 위한 릴레이구동부(12)와, 전자레인지의 도어 온/오프상태를 감지하기 위한 도어감지부(13)와, 입력되는 신호에 따라 다른 각 부의 동작을 제어하기 위한 제어부(17)와, 상기 제어부(17)의 입,출력정보를 표시하는 디스플레이부(14)와, 사용자가 원하는 기능을 키를 이용하여 입력시키기 위한 키입력부(15)와, 인가되는 AC입력전원에 의해 동작하여 마그네트론(MGT)을 발진시키기 위한 고압트랜스(H.V.T)와, 파워릴레이의 접점용착시 상기 제어부(17)의 제어출력에 따라 고압트랜스(H.V.T)로 공급되는 AC입력전원을 차단하기 위한 전압공급/차단제어부(18)와, 상기 파워릴레이(RY1)의 구동에 따라 AC입력전원이 공급되는지 안되는지를 감지하여 상기 제어부(17)에 전달하여 주는 파워릴레이상태 감지부(19)로 구성됨을 특징으로 하는 전자레인지 보호장치.A power supply unit 11 for supplying power to the microcomputer controller that controls the overall operation of the microwave oven, a relay driver 12 for driving the power relay of the microwave oven according to the control output, and a door on / off of the microwave oven Door detection unit 13 for detecting a state, a control unit 17 for controlling the operation of the other parts according to the input signal, and a display unit 14 for displaying the input and output information of the control unit 17 A key input unit 15 for inputting a function desired by a user using a key, a high voltage transformer (HVT) for oscillating a magnetron (MGT) by operating by an applied AC input power source, and contact welding of a power relay When the AC input power is cut in response to the driving of the power relay RY1 and the voltage supply / blocking control unit 18 to cut off the AC input power supplied to the high voltage transformer HVT according to the control output of the controller 17.Class that microwave protection, characterized by consisting of a power relay state detection unit 19 detects the andoeneunji to pass to the control unit 17. 제1항에 있어서, 전압공급/차단제어수단은 제어출력신호에 따라 온/오프하는 트랜지스터와, 상기 트랜지스터의 콜렉터측에 연결되어 그 트랜지스터의 온/오프상태에 따라 전원(Vry)을 공급 또는 차단하는 고압트랜스 차단용릴레이와 병렬연결된 역방향다이오드로 구성됨을 특징으로 하는 전자레인지 보호장치.2. The voltage supply / interruption control means according to claim 1, wherein the voltage supply / interruption control means is connected to a transistor on / off according to a control output signal and connected to a collector side of the transistor to supply or cut off the power supply Vry according to the on / off state of the transistor. Microwave protection device comprising a reverse diode connected in parallel with the high-voltage transformer blocking relay. 제1항에 있어서, 파워릴레이상태 감지수단은 포토커플러로 이루어진 것을 특징으로 하는 전자레인지 보호장치.The microwave protection device according to claim 1, wherein the power relay state detecting means comprises a photocoupler. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940022130A 1994-09-02 1994-09-02 Microwave oven protection device KR0139737B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940022130A KR0139737B1 (en) 1994-09-02 1994-09-02 Microwave oven protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940022130A KR0139737B1 (en) 1994-09-02 1994-09-02 Microwave oven protection device

Publications (2)

Publication Number Publication Date
KR960011265A true KR960011265A (en) 1996-04-20
KR0139737B1 KR0139737B1 (en) 1998-08-17

Family

ID=19391929

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940022130A KR0139737B1 (en) 1994-09-02 1994-09-02 Microwave oven protection device

Country Status (1)

Country Link
KR (1) KR0139737B1 (en)

Also Published As

Publication number Publication date
KR0139737B1 (en) 1998-08-17

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