KR950006345A

KR950006345A - Microwave Humidity Detection Device

Info

Publication number: KR950006345A
Application number: KR1019930017244A
Authority: KR
Inventors: 이재영
Original assignee: 배순훈; 대우전자주식회사
Priority date: 1993-08-31
Filing date: 1993-08-31
Publication date: 1995-03-20
Also published as: KR950010377B1

Abstract

본 발명은 전자렌지의 습도 검출장치에 관한 것으로, 종래에는 습도센서등을 브릿지회로로 구성하고 있으므로, 브릿지회로의 평형조절회로등 회로구성이 복잡해지는 문제점이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting humidity of a microwave oven. In the related art, since a humidity sensor or the like is conventionally configured as a bridge circuit, a circuit configuration such as a balance control circuit of the bridge circuit is complicated.

본 발명은, 전자레인지의 배기구(3)상에 복수개의 상하 전극판(12a, 12b)이 각각 일정한 간격을 두고 배열되어 그 상하 전극판(12a, 12b) 사이를 통과하는 습기 및 공기에 의해 정전용량이 가변되어 습도치를 검출하는 습도검출부(10)와, 그 습도검출부(10)의 정전용량변화치를 주파수신호로 변환시키는 주파수 변환부(20)와, 그 주파수 변환부(20)에서 출력되는 주파수신호를 입력받아 습도치로 환산하여 가열제어를 하는 메인콘트롤러(30)로 구성함으로써, 정전용량식 습도센서를 구성하여 습도를 검출할수 있고, 이로인해 조립의 간편성, 신뢰성 향상 및 원가 절감에 적당하게 된다.According to the present invention, the plurality of upper and lower electrode plates 12a and 12b are arranged at regular intervals on the exhaust port 3 of the microwave oven, and are electrostatically discharged by moisture and air passing between the upper and lower electrode plates 12a and 12b. The humidity detector 10 detects a humidity value by varying the capacitance, a frequency converter 20 for converting the capacitance change value of the humidity detector 10 into a frequency signal, and a frequency output from the frequency converter 20. By inputting the signal and converting it into a humidity value to configure the main controller 30 for heating control, a capacitive humidity sensor can be configured to detect humidity, thereby making it easy to assemble, improve reliability and reduce costs. .

Description

Microwave Humidity Detection Device

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

제1도는 종래 전자레인지의 습도검출 회로도,1 is a humidity detection circuit diagram of a conventional microwave oven,

제2도는 본 발명에 의한 전자레인지의 습도 검출장치 구성도,2 is a configuration diagram of a humidity detecting apparatus for a microwave oven according to the present invention;

제3도 (가) 및 (나)는 본 발명에 의한 정전용량 방식 습도검출부의 구조도,3 (a) and (b) is a structural diagram of the capacitance type humidity detection unit according to the present invention,

제4도는 정전용량 방식 습도검출설명도,4 is an explanatory diagram of capacitance type humidity detection,

제5도는 정전용량에 따른 주파수 변환부의 회로도,5 is a circuit diagram of a frequency converter according to capacitance,

제6도 (가) 및 (나)는 수증기 발생에 따른 정전용량과 주파수를 각각 보인 파형도,6 (a) and (b) are waveform diagrams showing capacitance and frequency according to the generation of water vapor,

제7도는 습도값 주파수 검출에 따른 요리제어 흐름도.7 is a cooking control flow chart according to the humidity value frequency detection.

Claims

The plurality of upper and lower electrode plates 12a and 12b are arranged at regular intervals on the exhaust port 3 of the microwave oven, and the capacitance is changed by moisture and air passing between the upper and lower electrode plates 12a and 12b. A humidity detector 10 for detecting a humidity value, a frequency converter 20 for converting the capacitance change value of the humidity detector 10 into a frequency signal, and a frequency signal output from the frequency converter 20 Humidity detection device of a microwave oven, characterized in that consisting of a main controller 30 for heating control in terms of humidity.

The upper and lower electrodes according to claim 1, wherein the humidity detectors 10 form upper and lower pairs at predetermined intervals in brackets 11 provided on the exhaust port 3 to match the size of the exhaust port 3, respectively. A device for detecting humidity in a microwave oven, characterized in that the plate (12a) (12b) is fixedly arranged and exhausted through the upper and lower electrode plates (12a) (12b).

3. The humidity detection apparatus according to claim 2, wherein the humidity detection unit (10) is configured by fixing three pairs of upper and lower electrode plates (12a, 12b) in the bracket (11).

The method of claim 1, wherein the main controller 30, the frequency input means for reading the frequency signal of the frequency converter 20, the input reference value for starting to read the frequency value and for each cooking type for automatic cooking A storage means for storing a cooking completion reference value in advance, an input time determination means for determining whether the input frequency is greater than or equal to the input reference value, and the input frequency is greater than or equal to the input reference value, and at regular intervals through the frequency input means. Average calculation means for calculating the average value except the maximum value and the minimum value by inputting a predetermined number of times, and the average value calculation process is repeatedly performed until the average value is above the cooking completion reference value, and when the average value is above the cooking completion reference value, cooking completion Characterized in that it comprises a means of determining the completion time of the signal generating signal Humidity detecting apparatus of the character range.

※ Note: The disclosure is based on the initial application.