KR930022927A - Microwave Load Measurement System - Google Patents

Microwave Load Measurement System Download PDF

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Publication number
KR930022927A
KR930022927A KR1019920006851A KR920006851A KR930022927A KR 930022927 A KR930022927 A KR 930022927A KR 1019920006851 A KR1019920006851 A KR 1019920006851A KR 920006851 A KR920006851 A KR 920006851A KR 930022927 A KR930022927 A KR 930022927A
Authority
KR
South Korea
Prior art keywords
input terminal
sensor
signal processor
control unit
sensor signal
Prior art date
Application number
KR1019920006851A
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Korean (ko)
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KR940007476B1 (en
Inventor
김정태
Original Assignee
이헌조
주식회사 금성사
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019920006851A priority Critical patent/KR940007476B1/en
Publication of KR930022927A publication Critical patent/KR930022927A/en
Application granted granted Critical
Publication of KR940007476B1 publication Critical patent/KR940007476B1/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
    • H05B6/68—Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Abstract

본 발명은 전자레인지의 무부하 감지에 관한 것으로, 유전체 센서(20)를 통해 가열실내(11)의 부하에 따른 정정용량을 검출하고, 센서신호 처리부(21)가 그 정정용량에 상응하는 주파수를 발진하며, 제어부(22)는 상기 센서 신호 처리부(21)로 부터 입력되는 신호의 주파수를 소정시간의 간격을 두고 측정한 후, 그 측정된 주파수의 차가 기 설정된 기준치를 상회할때 무부하 상태로 판정함으로써 무부하 상황을 보다 정확하게 감지할 수 있게 한 것이다.The present invention relates to detection of no load of a microwave oven, and detects a correction capacitance according to the load of the heating chamber 11 through the dielectric sensor 20, and the sensor signal processing unit 21 oscillates a frequency corresponding to the correction capacitance. The controller 22 measures the frequency of the signal input from the sensor signal processor 21 at intervals of a predetermined time, and then determines that the signal is in a no-load state when the difference of the measured frequencies exceeds a preset reference value. This allows more accurate detection of no-load conditions.

Description

전자레인지의 부하량 측정 시스템Microwave Load Measurement System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 일반적인 전자레인지의 무부하 감지 블록도, 제2도는 본 발명 전자레인지의 부하량 측정 시스템에 대한 블록도, 제3도는 제2도에서 센서신호 처리부의 상세회로도, 제4도는 본 발명에 적용된 유전체센서의 평면도, 제5도는 유전체센서의 온도변화에 따른 정전용량 변화 그래프, 제6도는 (가) 내지 (다)는 제3도 각부의 파형도, 제7도는 온도변화에 따른 부하별 주파수 그래프, 제8도는 본 발명의 신호 흐름도.1 is a no-load detection block diagram of a typical microwave oven, FIG. 2 is a block diagram of a load measurement system of a microwave oven of the present invention, FIG. 3 is a detailed circuit diagram of a sensor signal processing unit in FIG. 2, and FIG. 4 is a dielectric applied to the present invention. A plan view of the sensor, FIG. 5 is a graph of capacitance change according to the temperature change of the dielectric sensor, FIG. 8 is a signal flow diagram of the present invention.

Claims (2)

턴테이블 구동모터(14), 마그네트론(15), 고압트랜스(16), 팬모터(17) 및 요리표시 램프(18)의 구동을 제어하는 구동 제어부(19)와, 배출구(11')의 일측 벽에 설치되어 가열실(11)내의 온도에 상응되는 정전용량을 갖는 유전체 센서(20)와, 상기 유전체 센서(20)의 정정용량 변화에 사용되는 주파수의 신호를 발진하는 센서신호 처리부(21)와, 상기 센서신호 처리부(21)로 부터 입력되는 주파수를 소정시간 간격을 두고 측정하여 그 주파수차를 토대로 부하량을 판단함과 아울러, 상기 구동제어부(19)를 통해 시스템을 총괄제어하는 제어부(22)와, 전자레인지의 동작을 지시하기 위해 상기 제어부(22)에 사용자가 선택하는 각종 키이신호를 공급하는 조작부(23)로 구성한 것을 특징으로 하는 전자레인지의 부하량 측정 시스템.A drive control unit 19 for controlling the drive of the turntable drive motor 14, the magnetron 15, the high voltage transformer 16, the fan motor 17, and the dish display lamp 18, and one side wall of the discharge port 11 ′. A dielectric sensor 20 having a capacitance corresponding to a temperature in the heating chamber 11, a sensor signal processor 21 for oscillating a signal having a frequency used for changing the capacitance of the dielectric sensor 20; The controller 22 measures the frequency input from the sensor signal processor 21 at predetermined time intervals to determine the load based on the frequency difference, and controls the system through the drive controller 19. And an operation unit (23) for supplying various key signals selected by the user to the control unit (22) to instruct the operation of the microwave oven. 제1항에 있어서, 센서신호 처리부(21)는 일측 입력단자가 접지된 노아게이트 단자에 접속함과 아울러, 저항(R)을 통해 자신의 타측입력단자 및 유전체 센서(20)의 일측입력단자에 공통 접속하고, 상기 노아게이트(NOR2)의 출력단자를 상기 유전체 센서(20)의 타측입력단자 및 제어부(22)의 입력단자에 공통접속하여 구성한 것을 특징으로 하는 전자레인지의 부하량 측정 시스템.The sensor signal processor 21 is connected to a noah gate terminal of which one input terminal is grounded, and is connected to its other input terminal and one input terminal of the dielectric sensor 20 through a resistor (R). And a common connection, and an output terminal of the NOA gate (NOR2) connected in common to the other input terminal of the dielectric sensor (20) and an input terminal of the control unit (22). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920006851A 1992-04-23 1992-04-23 Road testing system of microwave oven KR940007476B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920006851A KR940007476B1 (en) 1992-04-23 1992-04-23 Road testing system of microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920006851A KR940007476B1 (en) 1992-04-23 1992-04-23 Road testing system of microwave oven

Publications (2)

Publication Number Publication Date
KR930022927A true KR930022927A (en) 1993-11-24
KR940007476B1 KR940007476B1 (en) 1994-08-18

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ID=19332198

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920006851A KR940007476B1 (en) 1992-04-23 1992-04-23 Road testing system of microwave oven

Country Status (1)

Country Link
KR (1) KR940007476B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020034583A (en) * 2000-11-02 2002-05-09 전주범 Apparatus for preventing unloaded oscillation of magnetron using capacitance sensors in microwave oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020034583A (en) * 2000-11-02 2002-05-09 전주범 Apparatus for preventing unloaded oscillation of magnetron using capacitance sensors in microwave oven

Also Published As

Publication number Publication date
KR940007476B1 (en) 1994-08-18

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