KR100205754B1 - Power control circuit for microwave oven - Google Patents

Power control circuit for microwave oven Download PDF

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KR100205754B1
KR100205754B1 KR1019970006430A KR19970006430A KR100205754B1 KR 100205754 B1 KR100205754 B1 KR 100205754B1 KR 1019970006430 A KR1019970006430 A KR 1019970006430A KR 19970006430 A KR19970006430 A KR 19970006430A KR 100205754 B1 KR100205754 B1 KR 100205754B1
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output
microwave oven
relay
high voltage
voltage transformer
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KR1019970006430A
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KR19980069378A (en
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이병천
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전주범
대우전자주식회사
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/642Cooling of the microwave components and related air circulation systems
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/66Circuits
    • H05B6/68Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

본 발명은 전자식 전자레인지의 출력 제어회로에 관한 것으로서, 특히 팬모터가 고압변성기에 일체로 구비된 전자식 전자레인지에 있어서, 출력조절을 실행하여도 고압변성기의 1차측에 소정전원이 계속 공급되는 즉, 고압변성기에 구비된 팬이 정지되지 않는 상태로 출력조절이 가능한 전자식 전자레인지의 출력 제어회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control circuit of an electronic microwave oven. In particular, in a microwave oven in which a fan motor is integrally provided with a high voltage transformer, the predetermined power is continuously supplied to the primary side of the high voltage transformer even when output adjustment is performed. In addition, the present invention relates to an output control circuit of an electronic microwave oven, in which a fan provided in a high-voltage transformer does not stop.

본 발명은 특히, 팬모터와 고압변성기가 일체로 구비된 전자식 전자레인지에 있어서, 제어수단(11)의 신호에 온/오프되는 동작릴레이(R3)에 단속되는 스위치단(S11)을 구동수단 접속단과 연결함과 동시에 제1라인(L)으로 고압변성기(T21) 1차측과 접속시키며, 또 출력릴레이(R4)에 단속되는 스위치(S12)단을 제2라인(L2)을 통해 고압변성기(T21)의 2차측 코일에 접속시켜 구성한 특징이 있다.In particular, the present invention relates to a driving means for connecting a switch stage (S11) intermittent to an operation relay (R3) on / off of a signal of the control means (11) in an electronic microwave oven having a fan motor and a high-pressure transformer integrally provided. The high pressure transformer T21 is connected to the primary side of the high voltage transformer T21 at the same time as the stage 1 and connected to the primary side of the high pressure transformer T21, and the switch S12 stage connected to the output relay R4 is connected through the second line L2. ) Is connected to the secondary coil.

Description

전자식 전자레인지의 출력 제어회로Output control circuit of microwave oven

본 발명은 전자식 전자레인지의 출력 제어회로에 관한 것으로서, 특히 팬모터가 고압변성기에 일체로 구비된 전자식 전자레인지에 있어서, 출력조절을 실행하여도 고압변성기의 1차측에 소정전원이 계속 공급되는 즉, 고압변성기에 구비된 팬이 정지되지 않는 상태로 출력조절이 가능한 전자식 전자레인지의 출력 제어회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control circuit of an electronic microwave oven. In particular, in a microwave oven in which a fan motor is integrally provided with a high voltage transformer, the predetermined power is continuously supplied to the primary side of the high voltage transformer even when output adjustment is performed. In addition, the present invention relates to an output control circuit of an electronic microwave oven, in which a fan provided in a high-voltage transformer does not stop.

도 1은 종래 전자식 전자레인지의 회로도로서, 출력릴레이(R1) 및 동작릴레이(S2)를 제어하는 콘트롤신호에 의해 입력전원(AC)을 구동부(3) 및 출력부(2)로 선택적으로 인가되도록 한 제어수단(1)과, 상기 제어수단(1)의 출력릴레이(R1) 및 동작릴레이(R2)와 각각이 연결된 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)와; 상기 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)의 단속으로 팬모터(FM), 트레이모터(GM), 고내등(CL)을 동작시키는 구동부(3)와; 입력전원(AC)을 공급받아 고압으로 변형시키는 고압트랜스(T2)와; 상기 고압트랜스(T2)로 부터 전압을 입력받아 고전압 출력을 발생시키는 고압캐패시터(C), 고압다이오드(D), 마그네트론(MGT)으로 된 출력부(2)로 구성된다.1 is a circuit diagram of a conventional microwave oven, in which an input power source AC is selectively applied to a driving unit 3 and an output unit 2 by a control signal for controlling an output relay R1 and an operation relay S2. One control means (1), primary and secondary safety switches (SW1, SW2) and monitor switches (SW3) connected to an output relay (R1) and an operation relay (R2) of the control means (1), respectively; A driving unit (3) for operating the fan motor (FM), the tray motor (GM), and the interior lamp (CL) by interrupting the primary and secondary safety switches (SW1, SW2) and the monitor switch (SW3); A high voltage transformer (T2) for receiving the input power (AC) and transforming it into a high voltage; It consists of a high-voltage capacitor (C), a high-voltage diode (D), a magnetron (MGT) output unit 2 for receiving a voltage from the high-voltage transformer (T2) to generate a high voltage output.

미설명부호 SW4는 고압트랜스 과열 방지스위치, S3은 도어감지스위치, T1은 저압트랜스, f는 퓨우즈이다.Reference numeral SW4 is a high-voltage transformer overheating switch, S3 is a door detection switch, T1 is a low-voltage transformer, f is a fuse.

이와같이 구성된 종래 전자레인지의 회로는 초기 조건이 전자레인지의 도어가 닫힌(closed)상태에서 사용자가 원하는 조리시간 등을 입력하여 조리시작키를 누르면 이에 제어수단(1)은 출력릴레이(R1) 및 동작릴레이(R2)가 온제어되어 그 스위치(S1,S2)가 단속되므로써 구동부(3) 및 고압트랜스(T2)로 입력전원(AC)이 인가된다.In the conventional microwave oven circuit configured as described above, when the user presses a cooking start key by inputting a cooking time desired by the user in a state where the door of the microwave oven is closed, the control means 1 operates the output relay R1 and operates. The relay R2 is turned on and the switches S1 and S2 are interrupted so that the input power AC is applied to the drive unit 3 and the high voltage transformer T2.

이에 입력전원(AC)이 고압트랜스(T2)에 인가되어 2차측의 고압을 출력부(2)의 고압캐패시터(C) 및 고압다이오드(D)를 통해 받아들여 마그네트론(MGT)이 발진하며, 또 팬모터(FM), 트레이모터(GM), 고내등(CL)이 동작되어 음식물을 가열하는 통상의 조리동작이 시작된다.The input power AC is applied to the high voltage transformer T2 to receive the high voltage of the secondary side through the high voltage capacitor C and the high voltage diode D of the output unit 2, and the magnetron MTG oscillates. The fan motor FM, the tray motor GM, and the interior lamp CL are operated to start a normal cooking operation for heating food.

그런 후, 소망하는 조리시간이 경과되면 제어수단(1)의 콘트롤신호로 출력릴레이(R1) 및 동작릴레이(R2)를 제어하여 구동부(1) 및 출력부(3)로 인가되는 전원을 차단시켜 조리 작동 중지를 실행한다.Then, when the desired cooking time has elapsed, the output relay R1 and the operation relay R2 are controlled by the control signal of the control means 1 to cut off the power applied to the drive unit 1 and the output unit 3. Execute cooking stop.

한편, 도 2는 도 1과 동일 기술요소이며, 변경된 구성요소는 고압변성기(T21)의 2차측코일에 소정전압을 생성하는 탭이 구비되며, 이 탭에 팬모터(FM)가 연결된다. 이와같은 회로는 전원종류별로 별도 사양을 마련해야 하는 팬모터를 단일의 사양으로 축소할 수 있는 이점이 있다.On the other hand, Figure 2 is the same technical elements as Figure 1, the modified component is provided with a tab for generating a predetermined voltage on the secondary side coil of the high-voltage transformer (T21), the fan motor (FM) is connected to this tab. Such a circuit has the advantage of reducing the fan motor, which requires a separate specification for each type of power supply, to a single specification.

한데, 상기와 같이 고압변성기(T21)에 일체로 제작된 팬모터(FM)가 구비된 전자레인지는 풀파워(PULL POWER)일 경우 탭과 연결된 팬모터(FM)에 인가되는 전압이 별 무리없이 공급되지만, 출력릴레이(R1)를 이용하여 출력조절을 행할 경우는 고압변성기(T21) 1차측코일에 영향을 끼쳐 2차측 코일에 자속이 발생되지 않는 상태 즉, 팬모터에 전원이 충분히 공급되지 않는 상태로 된다.However, in the microwave oven equipped with a fan motor (FM) integrally manufactured in the high-pressure transformer (T21) as described above, when the full power (PULL POWER), the voltage applied to the fan motor (FM) connected to the tap is not excessive. However, when the output is adjusted using the output relay R1, the primary coil of the high voltage transformer T21 is affected, so that no magnetic flux is generated in the secondary coil, that is, the power is not supplied sufficiently to the fan motor. It is in a state.

본 발명은 상기와 같은 사항을 감안하여 개발된 것으로서, 그 목적은 팬모터가 고압변성기에 일체로 구비된 전자식 전자레인지에 있어서, 출력조절을 실행하여도 고압변성기의 2차측에 영향을 미치지 않게 하는 즉, 고압변성기에 구비된 팬이 정지되지 않는 상태로 출력조절이 가능한 전자식 전자레인지의 출력 제어회로를 제공함에 있다.The present invention was developed in view of the above-mentioned matters, and an object thereof is to prevent the fan motor from being influenced on the secondary side of the high pressure transformer even in the microwave oven in which the motor is integrally provided with the high pressure transformer. In other words, the present invention provides an output control circuit of an electronic microwave oven, in which a fan provided in a high-voltage transformer is not stopped.

도 1은 종래 전자식 전자레인지의 회로도,1 is a circuit diagram of a conventional microwave oven,

도 2는 종래 전자식 전자레인지의 다른 실시 회로도,2 is another embodiment of a conventional microwave oven,

도 3은 본 발명이 적용된 전자레인지의 회로도.3 is a circuit diagram of a microwave oven to which the present invention is applied.

도면의 주요 부분에 대한 부호 설명Explanation of symbols for the main parts of the drawings

2 - 출력부,T21 - 고압트랜스,2-output, T21-high voltage transformer,

31 - 구동수단,11 - 제어수단.31-drive means, 11-control means.

상기 목적을 달성하기 위한 본 발명은 출력릴레이 및 동작릴레이를 제어하는 콘트롤신호에 의해 입력전원을 구동부 및 출력부로 선택적으로 인가되도록 한 제어수단과; 상기 제어수단의 출력릴레이 및 동작릴레이와 각각이 연결된 1차,2차안전스위치, 모니터스위치와; 상기 1차,2차안전스위치, 모니터스위치의 단속으로, 트레이모터, 고내등을 동작시키는 구동수단과; 입력전원을 공급받아 고압으로 변형하되, 팬모터와 일체로 제작된 고압트랜스와; 상기 고압트랜스로 부터 전압을 입력받아 고전압 출력을 발생시키는 고압캐패시터, 고압다이오드, 마그네트론으로 된 출력부로 구성된 공지의 전자식 전자레인지에 있어서, 상기 제어수단의 신호에 온/오프되는 동작릴레이에 단속되는 스위치단을 구동수단 접속단과 연결함과 동시에 제1라인으로 고압변성기 1차측과 접속시키며, 또 출력릴레이에 단속되는 스위치단을 제2라인을 통해 고압변성기의 2차측 코일에 접속시켜 구성한 특징이 있다.The present invention for achieving the above object is a control means for selectively applying the input power to the drive unit and the output unit by a control signal for controlling the output relay and the operation relay; First and second safety switches and monitor switches connected to the output relay and the operation relay of the control means, respectively; Drive means for operating a tray motor, an interior lamp, etc. by interrupting the primary and secondary safety switches and monitor switches; A high voltage transformer, which is deformed to a high pressure by receiving an input power and manufactured integrally with the fan motor; In a known microwave oven composed of a high-voltage capacitor, a high-voltage diode, a magnetron output unit for receiving a voltage from the high-voltage transformer to generate a high voltage output, the switch is intermittent to the operation relay turned on / off the signal of the control means The stage is connected to the drive means connecting end and the first line is connected to the primary side of the high-voltage transformer, and the switch stage intermittently connected to the output relay is connected to the secondary coil of the high-voltage transformer through the second line.

이하, 첨부된 도면에 의거하여 본 발명의 바람직한 일 실시예를 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명이 적용된 전자레인지의 회로도로서, 종래기술과 동일 기술요소는 동일 부호로써 설명한다.3 is a circuit diagram of a microwave oven to which the present invention is applied, and the same technical elements as in the prior art will be described with the same reference numerals.

출력릴레이(R1) 및 동작릴레이(R2)를 제어하는 콘트롤신호에 의해 입력전원(AC)을 구동수단(31) 및 출력부(2)로 선택적으로 인가되도록 한 제어수단(11)과; 상기 제어수단(11)의 출력릴레이(R1) 및 동작릴레이(R2)와 각각이 연결된 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)와; 상기 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)의 단속으로, 트레이모터(GM), 고내등(CL)을 동작시키는 구동수단(31)과; 입력전원(AC)을 공급받아 고압으로 변형하되, 팬모터(FM)와 일체로 제작된 고압트랜스(T21)와; 상기 고압트랜스(T21)로 부터 전압을 입력받아 고전압 출력을 발생시키는 고압캐패시터(C), 고압다이오드(D), 마그네트론(MGT)으로 된 출력부(2)로 구성된다.Control means (11) for selectively applying an input power source (AC) to the drive means (31) and the output unit (2) by a control signal for controlling the output relay (R1) and the operation relay (R2); Primary and secondary safety switches (SW1, SW2) and monitor switches (SW3) connected to the output relay (R1) and the operation relay (R2) of the control means (11), respectively; Drive means (31) for operating the tray motor (GM) and the high lamp (CL) at the interruptions of the primary and secondary safety switches (SW1, SW2) and the monitor switch (SW3); A high voltage transformer (T21) which is supplied with an input power source (AC) and is deformed to a high pressure, and is integrally formed with the fan motor (FM); It consists of a high-voltage capacitor (C), a high-voltage diode (D), the magnetron (MGT) output unit 2 for receiving a voltage from the high-voltage transformer (T21) to generate a high voltage output.

이상은 통상의 구성에 관한 설명으로 본 발명은 상기 제어수단(11)의 신호에 온/오프되는 동작릴레이(R3)와, 이 동작릴레이(R3)에 의해 단속되는 스위치(S11)단을 구비하되 상기 구동수단(31)과 연결되는 접속단과 연결하고, 또한 제1라인(L1)을 이용하여 고압변성기(T21) 1차측과도 연결시킨다.As described above, the present invention includes an operation relay R3 which is turned on / off by the signal of the control means 11 and a switch S11 stage which is interrupted by the operation relay R3. It is connected to the connection terminal connected to the drive means 31, and also connected to the primary side of the high-pressure transformer T21 by using the first line (L1).

그리고, 상기 제어수단(10)의 신호에 온/오프되는 출력릴레이(R4)와, 이 츨력릴레이(R4)에 의해 단속되는 스위치(S12)단을 구비하되, 이 스위치(S12)단은 제2라인(L2)을 통해 고압변성기(T21)의 2차측 코일에 접속하여 구성한다.And an output relay R4 turned on / off by the signal of the control means 10 and a switch S12 stage interrupted by the output relay R4, the switch S12 stage being a second stage. It is configured by connecting to the secondary coil of the high-pressure transformer T21 through the line (L2).

미설명부호 SW4는 고압트랜스 과열 방지스위치, S3은 도어감지스위치, T1은 저압트랜스, f는 퓨우즈이다.Reference numeral SW4 is a high-voltage transformer overheating switch, S3 is a door detection switch, T1 is a low-voltage transformer, f is a fuse.

상기와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.

초기 조건이 전자레인지의 도어가 닫힌(closed)상태에서 사용자가 원하는 조리시간 등을 입력하여 조리시작키를 누르면 이에 제어수단(11)은 출력릴레이 (R4)및 동작릴레이(R3)가 온제어되어 스위치(S12,S11)가 단속되므로써 구동수단(31) 및 고압트랜스(T2)로 입력전원(AC)이 인가된다.When the user enters a desired cooking time and the like in the initial condition, the door of the microwave oven is closed, the control means 11 controls the output relay R4 and the operation relay R3 on. Since the switches S12 and S11 are interrupted, the input power source AC is applied to the driving means 31 and the high voltage transformer T2.

이에 입력전원(AC)이 고압트랜스(T2)에 인가되어 2차측의 고압을 출력부(2)의 고압캐패시터(C) 및 고압다이오드(D)를 통해 받아들여 마그네트론(MGT)이 발진하며, 또 팬모터(FM), 트레이모터(GM), 고내등(CL)이 동작되어 음식물을 가열하는 통상의 조리동작이 시작된다.The input power AC is applied to the high voltage transformer T2 to receive the high voltage of the secondary side through the high voltage capacitor C and the high voltage diode D of the output unit 2, and the magnetron MTG oscillates. The fan motor FM, the tray motor GM, and the interior lamp CL are operated to start a normal cooking operation for heating food.

그런 후, 소망하는 조리시간이 경과되면 제어수단(11)의 콘트롤신호로 출력릴레이(R4) 및 동작릴레이(R3)를 제어하여 구동수단(31) 및 출력부(2)로 인가되는 전원을 차단시켜 조리 작동 중지를 실행한다.Then, when the desired cooking time has elapsed, the output relay R4 and the operation relay R3 are controlled by the control signal of the control means 11 to cut off the power applied to the driving means 31 and the output unit 2. To stop cooking.

한데, 본 발명은 출력릴레이(R4)를 이용하여 출력조절을 행할 경우는 고압변성기(T21) 1차측코일에 영향을 끼쳐 2차측 코일에 자속이 발생되지 않았던 현상을, 출력조절시 제2라인(L2)을 통해 2차측 코일을 직접 제어하므로 이에 1차측 코일에는 영향을 주지 않는 상태로 출력조절을 행할수 있게 된다.However, in the present invention, when the output adjustment is performed using the output relay R4, a phenomenon in which the magnetic flux is not generated in the secondary coil due to the influence on the primary coil of the high pressure transformer T21 is generated. Since the secondary coil is directly controlled through L2), the output coil can be controlled without affecting the primary coil.

그리하여 1차측코일의 정상적인 자속공급으로 인해 2차측에 구비된 팬모터가 정상동작을 행할수 있음은 당연하다.Thus, it is natural that the fan motor provided on the secondary side can operate normally due to the normal magnetic flux supply of the primary coil.

이상에서 살펴본 바와 같이 본 발명은 팬모터가 고압변성기에 일체로 구비된 전계식 전자레인지에 있어 출력조절을 실행하여도 고압변성기에 구비된 팬이 정지되지 않는 상태로 출력조절이 가능한 특징을 지닌다.As described above, the present invention has a feature that the fan motor is capable of output adjustment in a state in which the fan provided in the high-pressure transformer is not stopped even when the output adjustment is performed in the electric microwave oven provided integrally with the high-pressure transformer.

이상의 설명은 본 발명의 일 실시예에 불과하며, 본 발명의 그 구성요지 범위내에서 얼마든지 변경이 가능하다.The above description is only one embodiment of the present invention, and any change may be made within the scope of the present invention.

Claims (1)

출력릴레이(R4) 및 동작릴레이(R3)를 제어하는 콘트롤신호에 의해 입력전원(AC)을 구동수단(31) 및 출력부(2)로 선택적으로 인가되도록 한 제어수단(11)과; 상기 제어수단(11)의 출력릴레이(R4) 및 동작릴레이(R3)와 각각이 연결된 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)와; 상기 1차,2차안전스위치(SW1,SW2), 모니터스위치(SW3)의 단속으로, 트레이모터(GM), 고내등(CL)을 동작시키는 구동수단(31)과; 입력전원(AC)을 공급받아 고압으로 변형하되, 팬모터(FM)와 일체로 제작된 고압트랜스(T21)와; 상기 고압트랜스(T21)로 부터 전압을 입력받아 고전압 출력을 발생시키는 고압캐패시터(C), 고압다이오드(D), 마그네트론(MGT)으로 된 출력부(2)로 구성된 공지의 전자식 전자레인지에 있어서, 상기 제어수단(11)의 신호에 온/오프되는 동작릴레이(R3)에 단속되는 스위치단(S11)을 구동수단 접속단과 연결함과 동시에 제1라인(L)으로 고압변성기(T21) 1차측과 접속시키며, 또 출력릴레이(R4)에 단속되는 스위치(S12)단을 제2라인(L2)을 통해 고압변성기(T21)의 2차측 코일에 접속시켜 구성한 것임을 특징으로 한 전자식 전자레인지의 출력 제어회로.Control means (11) for selectively applying an input power source (AC) to the drive means (31) and the output unit (2) by a control signal for controlling the output relay (R4) and the operation relay (R3); Primary and secondary safety switches (SW1 and SW2) and monitor switches (SW3) connected to the output relay (R4) and the operation relay (R3) of the control means (11), respectively; Drive means (31) for operating the tray motor (GM) and the high lamp (CL) at the interruptions of the primary and secondary safety switches (SW1, SW2) and the monitor switch (SW3); A high voltage transformer (T21) which is supplied with an input power source (AC) and is deformed to a high pressure, and is integrally formed with the fan motor (FM); In a well-known microwave oven comprising an output unit (2) of a high voltage capacitor (C), a high voltage diode (D), a magnetron (MGT) for receiving a voltage from the high voltage transformer (T21) to generate a high voltage output, Connecting the switch stage S11 intermittent to the operation relay R3 turned on / off by the signal of the control means 11 with the driving means connecting end and at the same time as the primary side of the high pressure transformer T21 to the first line L And an output control circuit of the microwave oven connected to the secondary coil of the high-voltage transformer T21 via a second line L2, the switch S12 being interrupted to the output relay R4. .
KR1019970006430A 1997-02-28 1997-02-28 Power control circuit for microwave oven KR100205754B1 (en)

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KR100205754B1 true KR100205754B1 (en) 1999-07-01

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