KR950006340A

KR950006340A - Microwave impedance matching controller and control method

Info

Publication number: KR950006340A
Application number: KR1019930017114A
Authority: KR
Inventors: 한경해
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1993-08-31
Filing date: 1993-08-31
Publication date: 1995-03-20
Also published as: KR950010376B1

Abstract

본 발명은 전자레인지의 임피던스 정합 제어장치와 제어방법에 관한 것으로, 고내(2)의 음식물(3)을 가열할 때 음식물(3)의 양과질에 따라 최적의 조리상태를 얻기위하여 마이크로파를 임피던스 정합하여 최적의 조리상태를 얻도록한 것으로, 상기 마이크로파를 임피던스 정합하기위해 마이크로파를 고내(2)에 전송시키는 도파관(6) 내에 실험적으로 구한 임피던스 정합위치에 스터브를 장착하거나, 자계센서(8)를 장착하여 임피던스 정합상태를 비정합 상태이면 고내(2)의 형상을 변형시키거나, 유전체(12)를 이송시켜 고내(2)에 전송되는 마이크로파의 위상을 조절하여 임피던스가 정합되게 하지만, 고가의 자계센서와 서보모터(9)를 사용하므로서 원가상승 및 자계센서(8)에서 측정하는 임피던스 정합상태가 정밀하지 못해 최적의 조리상태를 얻지못하는 문제점을 해결하기 위한 것이다.The present invention relates to an impedance matching control device and a control method of a microwave oven, and to match an microwave with an impedance to obtain an optimum cooking condition according to the quantity and quality of the food (3) when heating the food (3) in the refrigerator (2). To obtain an optimum cooking state, and to place the stub at the impedance matching position experimentally obtained in the waveguide 6 which transmits the microwave to the inside of the refrigerator 2 for impedance matching of the microwave or the magnetic field sensor 8 If the impedance matching state is inconsistent, the shape of the inside of the refrigerator 2 may be deformed, or the dielectric 12 may be transferred to adjust the phase of the microwaves transmitted to the interior of the refrigerator 2 so that the impedance is matched. By using the sensor and the servomotor (9), the impedance matching measured by the cost increase and the magnetic field sensor (8) is not accurate, and thus the optimum cooking state cannot be obtained. To solve the problem.

본 발명의 이와같은 종래 문제점을 해결하기 위하여, 임피던스 비정합시, 또는 마그네트론의 자체발열에 의해 마그네트론에 가해지는 전압이 낮을 때 고정입력전력이 소비되는 것을 이용하여 도파관내의 스터브위치를 조절하여 최적의 임피던스 정합이 되도록 하므로서 음식물 조리시, 음식물의 양과질에 관계없이 최적의 조리상태를 얻도록 한 것으로 전자레인지에 적용한다.In order to solve the conventional problems of the present invention, by adjusting the stub position in the waveguide by using a fixed input power is consumed when the impedance is mismatched, or when the voltage applied to the magnetron is low due to the self-heating of the magnetron, the optimum impedance When the food is cooked so as to be matched, it is applied to the microwave oven to obtain the optimum cooking state regardless of the quantity and quality of the food.

Description

Microwave impedance matching controller and control method

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

제1도는 종래 전자레인지의 구조를 보인 단면도,1 is a cross-sectional view showing the structure of a conventional microwave oven,

제2도는 종래 다른 실시예를 보인 전자레인지의 단면도,2 is a cross-sectional view of a microwave oven according to another embodiment of the prior art,

제3도는 종래 또다른 실시예를 보인 전자레인지의 단면도,3 is a cross-sectional view of a microwave oven according to another embodiment of the prior art,

제4도는 본 발명 전자레인지의 임피던스 정합 제어장치 블럭구성도,4 is a block diagram of an impedance matching controller of a microwave oven according to the present invention;

제5도는 본 발명 전자레인지의 부분 단면도,5 is a partial cross-sectional view of the present invention microwave oven,

제6도는 본 발명 다른 실시예를 보인 전자레인지의 부분 단면도,6 is a partial cross-sectional view of a microwave oven according to another embodiment of the present invention;

제7도는 본 발명 전자레인지의 임피던스 정합 제어과정을 보인 플로우챠트.Figure 7 is a flow chart showing the impedance matching control process of the microwave oven of the present invention.

Claims

Electron consisting of a magnetron 25 for generating electromagnetic waves, a driving device for driving the magnetron 25, a waveguide 31, which is a path of electromagnetic waves generated in the magnetron 25, and a heating chamber 32 in which food is heated. In the range, a stub (35) attached to any part of the waveguide (31) and rotating at a low speed to match impedance, a detector (30) for detecting a voltage applied to the magnetron (25), and An impedance matching control device for a microwave oven including a microcomputer (27) for controlling the driving motor (34) to rotate the stub (35) in a predetermined step so that the voltage value detected by the detector (30) becomes maximum.

The first process of driving the drive motor 34 by one rotation so as to drive the magnetron 25 to generate microwaves, and at the same time to drive the stub 32 in the waveguide 31 stepwise, the first rotated drive motor 34 And a second process of comparing the magnetron voltage values detected by the detector 30 at the current and previous rotation angles of the motor), and if the current detected voltage value is greater than the previous detected voltage value, storing the driving motor (34). A third process that is repeatedly executed from the first process until the first rotation is completed; and when the driving motor 34 is driven one revolution, the drive corresponding to the magnetron voltage maximum value detected by the detector 30 is driven. The fourth process converts the rotation angle of the motor 34 into time to drive the driving motor 34 to move the stub 35 by the converted time to match the impedance of the microwave to obtain an optimum cooking state. phrase Impedance matching control method of a microwave oven.

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