KR950014725A

KR950014725A - Food status detection device and driving method of microwave oven

Info

Publication number: KR950014725A
Application number: KR1019930025856A
Authority: KR
Inventors: 이재영
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1993-11-30
Filing date: 1993-11-30
Publication date: 1995-06-16

Abstract

본 발명은 전자렌지에 관한 것으로서, 트레이(8)에 위치하는 음식물(7)의 중량에 따라 벨로우즈(10, 12)의 부괴가 변함에 따라 극판(13, 14)간격이 역시 변화하므로 발진부(31)의 발진주파수가 변화하며, 음식물(7)이 유전가열됨에 따라 조리실(3)내부의 습도가 변화하므로 극판(13, 14)사이의 유전율이 변화하여 발진부(31)의 발진주파수가 변화한다.The present invention relates to a microwave oven, and as the ingots of the bellows (10, 12) change according to the weight of the food (7) located in the tray 8, the gap between the pole plates (13, 14) also changes, the oscillator (31) Oscillation frequency of), and the humidity inside the cooking chamber (3) changes as the food (7) is heated, the dielectric constant between the pole plates (13, 14) is changed to change the oscillation frequency of the oscillator (31).

마이콤(32)은 발진부(31)의 발진주파수에 따라 음식물(7)의 중량에 따른 마그네트론의 구동시간을 설정하는 한편 음식물이 조리완료상태인가를 판단하여 마그네트론의 구동을 제어함으로써 음식물을 자동조리할 수 있는 전자렌지를 소형, 경량화 할 수 있다.The microcomputer 32 sets the driving time of the magnetron according to the weight of the food 7 according to the oscillation frequency of the oscillation unit 31, and determines whether the food is ready for cooking, and controls the driving of the magnetron to automatically cook food. The microwave oven can be made smaller and lighter.

Description

Food status detection device and driving method of microwave oven

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

제1도는 본 발명에 따른 전자렌지의 음식물 상태 감지장치를 구비하는 전자렌지의 개략 단면도,1 is a schematic cross-sectional view of a microwave oven having a food state sensing apparatus for a microwave oven according to the present invention;

제2도는 본 발명에 따른 전자렌지의 음식물 상태 감지장치에 이루어지는 발진부의 회로도,2 is a circuit diagram of the oscillator made in the microwave food state detection apparatus according to the present invention,

제3도는 본 발명에 따른 전자렌지의 음식물 상태 감지장치의 블럭도,3 is a block diagram of a food state sensing apparatus of a microwave oven according to the present invention;

제4도는 본 발명에 따른 전자렌지의 구동방법을 행하는 흐름도이다.4 is a flowchart of a method of driving a microwave oven according to the present invention.

Claims

An apparatus for sensing the weight of food and humidity in the cooking chamber in a microwave oven, comprising: a first bellows positioned at the bottom of a tray on which food is placed, the volume of which varies in accordance with the weight pressed from the tray, and intakes / exhales air; A second bellows whose volume varies depending on the amount of air sucked in / out; An air pipe for transferring air drawn in / out of the first and second bellows between the first and second bellows, and a first electrode plate attached to the second bellows; A second electrode plate disposed at a position opposite to the first electrode plate and defining an outlet for discharging air in the cooking chamber between the first plate and the first plate; And an oscillation unit connected to the first and second pole plates to oscillate a signal having a predetermined frequency according to the dielectric constant between the first and second pole plates and the first and second pole plates.

The oscillator of claim 1, wherein the oscillator comprises: a first inverter connected to the first electrode plate; A first resistor connected between the output terminal of the first inverter and the second electrode plate; A second inverter having an output terminal connected to an input terminal of the first electrode plate and the first inverter; The food state sensing apparatus of the microwave oven having a second resistor connected between the second electrode plate and the input terminal of the second inverter.

A method of driving a microwave oven comprising a food state sensing device for outputting a weight of food and a humidity in a cooking chamber as a predetermined frequency signal, wherein the weight of food is detected according to a frequency of a signal output from the food state sensing state. And setting a predetermined first driving time to the sensed food weight; Driving the magnetron in the microwave; Determining whether food in a cooking compartment has risen to a predetermined temperature according to a frequency of a signal output from the food state sensing device; Determining whether the set first driving time is reached; And stopping the driving of the magnetron when the food in the cooking chamber rises to a predetermined temperature or reaches the set first driving time.

4. The method of claim 3, further comprising: determining whether the microwave oven is driven in a mode for thawing food; Setting a predetermined second driving time according to the detected weight of food when the microwave is driven in a mode for thawing food; Determining whether the set second driving time is reached; And stopping driving of the magnetron when the set second driving time is reached.

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