KR950013319A

KR950013319A - How to read power supply frequency of microwave oven

Info

Publication number: KR950013319A
Application number: KR1019930022815A
Authority: KR
Inventors: 박희중
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1993-10-30
Filing date: 1993-10-30
Publication date: 1995-05-17

Abstract

본 발명은 전자레인지의 전원주파수 판독방법에 관한 것으로, 종래에는 전원입력 초기부터 주파수 판독을 하기때문에 초기 불안정에 따른 에러가 발생될 수 있다. 이에따라 본 발명은 전원주파수의 1주기마다 발생되는 외부인터럽트가 걸리면, 내부타이머를 동작시키는 1주기시간이 경과되기 전에 외부인터럽트가 걸리는지, 소정시간을 경과한후에 외부인터럽트가 걸리는지에 의거하여 60Hz인지 50Hz인지에 대해 서로구별되게 세팅시키는 1차판독과정과, 그 1차판독과정에서 세팅된 이전세팅값과 현재세팅값이 같은지를 판단하여 같은 경우에만 횟수카운트를 증가시키는 횟수카운트과정과, 그 횟수 카운트값이 미리 설정된 소정횟수를 넘게되면, 상기 세팅된 값에 따라 해당주파수로 판단하여 주파수 판독을 완료하는 주파수판독과정을 수행하도록 이루어진 프로그램을 마이컴에 내장시켜 구성함으로써, 전원 주파수 판독의 정확성을 높여 신뢰성을 향상시킬수가 있게 된다.The present invention relates to a method for reading a power frequency of a microwave oven, and in the related art, an error due to initial instability may occur because the frequency is read from an initial power input. Accordingly, according to the present invention, if an external interrupt occurs every one cycle of the power frequency, whether the external interrupt occurs before one cycle time for operating the internal timer or whether the external interrupt occurs after a predetermined time is 60 Hz or 50 Hz. The first reading process of setting differently for each other, the number counting process of increasing the count count only when the same value is determined by determining whether the previous setting value and the current setting value set in the first reading process are the same, and the count value When the predetermined number of times is exceeded, the microcomputer has a built-in program configured to perform a frequency reading process to complete the frequency reading by judging by the corresponding frequency according to the set value, thereby increasing the accuracy of power frequency reading and increasing reliability. It can be improved.

Description

How to read power supply frequency of microwave oven

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

제1도는 본 발명에 의한 전자레인지의 전원주파수 판독방법을 실현시키는 마이컴이 포함된 제어회로블럭,1 is a control circuit block including a microcomputer for realizing a power frequency reading method of a microwave oven according to the present invention;

제2도는 본 발명에 따른 전자레인지의 전원주파수 판독방법의 제어흐름도.2 is a control flowchart of a method for reading a power frequency of a microwave oven according to the present invention.

Claims

If an external interrupt occurs every 1 cycle of the power frequency, distinguish between 60Hz and 50Hz based on whether an external interrupt occurs before one cycle time of operating the internal timer or if an external interrupt occurs after a predetermined time. The first reading process for setting the number of times, the number counting process for increasing the count count only when the same value is determined by determining whether the previous setting value and the current setting value are the same in the first reading process, and the predetermined number of times is set in advance. When the number of times is exceeded, the power frequency reading method of the microwave oven, characterized in that the frequency is determined to perform a frequency reading process to complete the frequency reading by determining the corresponding frequency according to the set value.

The method of claim 1, wherein the first reading process comprises: a time checking step of determining whether the count time of the internal timer reaches the predetermined time, and the count time of the internal timer is determined by the predetermined time as a result of the time check. An external interrupt determination step of determining whether the external interrupt is applied again until time is reached, and if an external interrupt is caught in the external interrupt determination step, 60 Hz of performing a first set (RAM1 = 2) according to the 60 Hz judgment on the first RAM. And a 50 Hz determination step of performing a first set (RAM1 = 1) according to a 50 Hz determination on the first RAM when the counting time of the internal timer reaches the predetermined predetermined time. How to read the power frequency of the microwave oven.

The method of claim 1, wherein the counting process comprises: determining whether the setting values of the second ram storing the previous setting value and the first ram storing the current setting value are the same, and the setting value of the first ram; If the setting value of the RAM and the second is different from each other, the second RAM is replaced with the current setting value of the first RAM, the previous value storage step of clearing the count counter, the setting value of the first RAM and the second RAM If the same, the power frequency reading method of the microwave oven, characterized in that to perform a count count increasing step of increasing the count value of the count counter by one.

2. The method of claim 1, wherein the frequency reading process includes: determining whether the counter value of the number counter becomes a predetermined number of times and returning to the one cycle counting process until the predetermined number of times is reached; When a predetermined number of times is reached, determining whether the setting value set in the first reading process is a setting value (RAM1 = 2) according to 60 Hz reading, and as a result, setting value (RAM1 = 2) according to 60 Hz reading. In this case, the power supply frequency of the microwave oven is determined to be 60 Hz, and in the case of a setting value (RAM1 = 2) according to the 50 Hz reading, the power supply frequency is determined to be 50 Hz to complete the frequency reading. Read method.

5. The method of claim 4, wherein the predetermined number of times compared with the count value of the number counter is 10 times.

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