KR940002509Y1 - Thermister controlling circuit of microwave oven - Google Patents

Thermister controlling circuit of microwave oven Download PDF

Info

Publication number
KR940002509Y1
KR940002509Y1 KR2019880014157U KR880014157U KR940002509Y1 KR 940002509 Y1 KR940002509 Y1 KR 940002509Y1 KR 2019880014157 U KR2019880014157 U KR 2019880014157U KR 880014157 U KR880014157 U KR 880014157U KR 940002509 Y1 KR940002509 Y1 KR 940002509Y1
Authority
KR
South Korea
Prior art keywords
heater
microwave oven
temperature
resistor
triac
Prior art date
Application number
KR2019880014157U
Other languages
Korean (ko)
Other versions
KR900006016U (en
Inventor
허권
Original Assignee
주식회사 금성사
최근선
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 금성사, 최근선 filed Critical 주식회사 금성사
Priority to KR2019880014157U priority Critical patent/KR940002509Y1/en
Publication of KR900006016U publication Critical patent/KR900006016U/en
Application granted granted Critical
Publication of KR940002509Y1 publication Critical patent/KR940002509Y1/en

Links

Classifications

    • 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
    • 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
    • H05B6/647Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473Aspects related to microwave heating combined with other heating techniques combined with convection heating

Abstract

내용 없음.No content.

Description

전자레인지의 온도 제어 회로Microwave temperature control circuit

제 1 도는 종래 컨배션 타입 전자레인지의 설명도.1 is an explanatory diagram of a conventional convection type microwave oven.

제 2 도는 종래의 컨백션 타입 전자레인지의 캐비티내의 열풍 순환로.2 is a hot air circulation path in a cavity of a conventional convection type microwave oven.

제 3 도는 종래의 컨백션 타입 전자레인지의 캐비티내의 냉풍 순환로.3 is a cold air circulation path in a cavity of a conventional convection type microwave oven.

제 4 도는 종래의 컨백션 타입 전자레인지의 온도 제어 회로.4 is a temperature control circuit of a conventional convection type microwave oven.

제 5 도는 써미스터를 제외한 컨백션 타입 전자레인지의 설명도.5 is an explanatory diagram of a convection type microwave oven excluding the thermistor.

제 6 도는 본 고안에 따른 온도 제어 회로도.6 is a temperature control circuit diagram according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 캐비티 2 : 도파관1: cavity 2: waveguide

3 : 마그네트론 4 : 히터3: magnetron 4: heater

5 : 써미스터 6 : 팬5: thermistor 6: fan

7 : 턴테이블 8 : 콘트롤러7: turntable 8: controller

9 : 모타 10 : 벨트9: motor 10: belt

11 : 릴레이 21 : 마이콤11: relay 21: micom

22 : 키보드 23 : A/D변환기22: keyboard 23: A / D converter

24 : 전원 ZD : 제너다이오우드24: power ZD: Zener diode

R1-R13: 저항 C1: 콘덴서R 1 -R 13 : Resistor C 1 : Capacitor

Q1: 트랜지스터 ME1,MT2: 트라이액Q 1 : Transistor ME 1 , MT 2 : Triac

본 고안은 전자레인지의 온도 제어 장치에 관한 것으로 특히 히타를 겸용으로 사용하는 컨백션 타입의 전자레인지의 온도 제어 회로에 관한 것이다.The present invention relates to a temperature control device of a microwave oven, and more particularly to a temperature control circuit of a convection type microwave oven using a heater as a combined.

종래에는 전자레인의 컨백션(Convection)기능에서는 히타(4)를 릴레이(11)로서 온 오프시키므로서 전자레인지의 고내 온도를 제어하였다.Conventionally, in the convection function of the electric lane, the temperature inside the oven of the microwave oven was controlled by turning the heater 4 on and off as the relay 11.

즉 히타(4)에 전원이 인가되면 히타(4)의 가열에 따라 열이 발생하여 팬(6)으로 캐비티(1)내로 불여넣어 주는 것이다.That is, when power is applied to the heater 4, heat is generated as the heater 4 is heated, and the fan 4 is blown into the cavity 1 by the fan 6.

이 열풍이 일정 온도까지 상승하면 열 감지기인 써미스터(5)가 회로를 통하여 마이콤(21)이 일레이(11)의 온 오프를 제어하여 캐비티(1)내의 온도를 제어하게 되었다.When the hot air rises to a certain temperature, the thermistor 5, which is a heat sensor, controls the temperature of the cavity 1 by controlling the on and off of the array 11 through the circuit.

종래의 컨백션 타입의 전자레인지의 온도 제어 장치에 관해서 그 동작을 제 4 도에 따라 설명하면 A/D 변환기(23)의 입력 전압 Vin은이라 하면 (R6은 써미스터(5)의 저항가 되어 이것은 R0의 함수가 된다.Referring to FIG. 4, the operation of the conventional temperature control apparatus of the convection-type microwave oven, the input voltage Vin of the A / D converter 23 is (R 6 is the resistance of the thermistor (5) Which becomes a function of R 0 .

R4는 전류 제한용이며 Rin'〈〈Rin 이므로 Vin7Vin'가 된다.R 4 is for current limiting and Rin '<< Rin so Vin7 Vin '

㉮ Vin의 전압 범위는 상온에서(25℃)=280KΩ정도에서 R0=280(KΩ), l2=1(KΩ), R3=3.2(KΩ)라 하면정도가 되고 여기서(Vz는 제너전압 약 5.1V)= 전압 The voltage range of Vin is about room temperature (25 ℃) = 280KΩ If R 0 = 280 (KΩ), l 2 = 1 (KΩ), and R 3 = 3.2 (KΩ) About and here (Vz is Zener voltage about 5.1V) =

㉲ 450℉에서는 R0=500Ω정도이므로 At 450 ℉, R0 = 500Ω

정도로 측정되어 아날로그양을 디지탈양으로 A/D변환기(23)에서 컨버터시켜 히타(4)에 통전시켜 준다.It is measured to the degree and converts the analog amount into the digital amount by the A / D converter 23 to energize the heater 4.

다시 말해서 높은 전압이 A/D 변환기(23)에 들어오면 히타(4)에 릴레이(11)가 장시간 동안 전기를 인가하여 뜨거운 열풍을 캐비티(1)내에 보내주고 낮은 전압이 A/D변환기(23)에 들어오면 히타(4)에 릴레이(11)가 단시간 동안에 전위가 인가되어 덜 뜨거운 열풍을 캐비티(1)내로 보내준다.In other words, when a high voltage enters the A / D converter 23, the relay 11 applies electricity to the heater 4 for a long time to send hot hot air into the cavity 1, and a low voltage of the A / D converter 23. ), The relay 11 is applied to the heater 4 for a short time to send less hot hot air into the cavity 1.

따라서 종래의 기술의 문제점을 히타(4)를 온, 오프시키므로서 원하는 열이 균일하게 공급되지 못하고 만일 약 200℉의 온도를 원할때 히타(4)를 온시켜 열을 높이면 원하는 200℉보다 훨씬 높은 온도까지 올라게가 되고(+15℉ 이상), 혹은 히타(4)를 오프시키면 너무 낮은 온도로 떨어지게 되어(-15℉)정확한 200℉는 유지되지 않는다.Therefore, the problem of the prior art is that the desired heat is not evenly supplied by turning the heater 4 on and off, and if the temperature of the heater 4 is increased when the temperature of about 200 ° F is desired, the temperature is much higher than the desired temperature of 200 ° F. Up to (+ 15 ° F), or turning off the heater (4) will drop to too low a temperature (-15 ° F), so the exact 200 ° F will not be maintained.

따라서 일정 온도의 유지를 위한 최고 온도와 최저 온도의 차이가 심하게 되는 단점이 있었다.Therefore, there is a disadvantage that the difference between the highest temperature and the lowest temperature for maintaining a constant temperature is severe.

본 고안은 이와 같은 단점을 개선하고 안출된 것으로서 그 구성을 제 7 도에 따라 설명하면 다음과 같다.The present invention has been made to improve the disadvantages as described and described the configuration according to Figure 7 as follows.

히타(4)의 전원을 제어할수 있는 콘트롤러(8)를 포함하고 콘트롤러(8)은 트라이액(MT1)(MT2)과 저항(R1), 가변저항(R2), 게이트 저항(R3), 동작 지연용 콘덴서(C1)으로 평균 전류를 일정하게 가변시켜 히타(4)에 전류를 제어하여 온도를 제어하도록 구성되어 있다.The controller 8 includes a controller 8 capable of controlling a power supply of the heater 4, and the controller 8 includes a triac MT 1 , MT 2 , a resistor R 1 , a variable resistor R 2 , and a gate resistor R. 3 ), the operation delay capacitor C 1 is configured to constantly vary the average current to control the current to the heater 4 to control the temperature.

본 고안에 따른 온도 제어 회로의 동작 상태를 설명하면 제 7 도의 회로는 트라이액 트리거링 회로이다.Referring to the operating state of the temperature control circuit according to the present invention the circuit of Figure 7 is a triac triggering circuit.

여기서 콘덴서(C1)은 (+)(-)반주기 지연 기간 동안에 저항(R1)과 저항(R2)를 통해 전하를 충전한다.Here, the capacitor C 1 charges the charge through the resistor R 1 and the resistor R 2 during the positive (+) (-) half cycle delay period.

콘덴서(C1)의 (+)반주기 동안은 트라이액(MT2)는 트라이액(MT1)보다 (+)이고 콘덴서(C1)에 (+)전하가 충전되며 저항(R2)를 통해서 게이트 전류(IGT)를 충분히 흘릴수 있는 정도의 전하가 충전되면 또한 트라이액(MT1)(MT2)은 트리거 하여 결국 트라이액(MT1)(MT2)은 작동된다. 콘덴서(C1)의 충전 비율은 저항(R2)로 조정한다.During the (+) half cycle of the capacitor (C 1 ), the triac (MT 2 ) is more positive than the triac (MT 1 ), and the capacitor (C 1 ) is charged with (+) charge, and through the resistor (R 2 ) When the charge enough to flow the gate current IGT is charged, the triac MT 1 MT 2 is triggered and the triac MT 1 MT 2 is activated. The charging ratio of the capacitor C 1 is adjusted by the resistor R 2 .

만약 저항(R2)의 값이 크면 충전 비율이 낮아져서 동작 지연이 길어지는 원인이 되며 히타(4)에 걸리는 평균 전류가 낮아진다.If the value of the resistor R 2 is large, the charge rate is lowered, which causes a long operation delay, and the average current applied to the heater 4 is lowered.

이와 반대로 저항(R2)의 값이 작아지면 충전 비율이 높아져 동작지연은 짧아지며 히터(4)의 전류는 많아진다.On the contrary, as the value of the resistor R 2 decreases, the charging ratio increases, the operation delay decreases, and the current of the heater 4 increases.

히타(4)의 전류가 작아지면 히타(4)가 조금 뜨거워지게 하여 캐비타(1)내의 온도를 낮추어주고, 전류를 많게 하면 히타(4)가 뜨겁게 되어 전자레인지의 캐비티(1)내의 온도를 높게해준다.When the current of the heater 4 decreases, the heater 4 becomes slightly hot to lower the temperature in the cavity 1, and when the current is increased, the heater 4 becomes hot and the temperature in the cavity 1 of the microwave oven is increased. Make it high.

따라서 본 고안에 따른 온도 제어 장치는 무접점 방식의 전류 제어를 하기 때문에 원하는 온도의 편차가 거의 없으며 충전 회로의 복잡성이나 부품의 과다를 줄이고 종전에 사용한 히타(4)를 온, 오프시켰던 릴레이(11)를 사용하지 않으므로서 원가를 대폭 줄일수 있는 것이다.Therefore, since the temperature control device according to the present invention performs the contactless current control, there is almost no variation in the desired temperature, and the relay 11 that has turned on and off the heater 4 used previously, reduces the complexity of the charging circuit and the excessive amount of components. The cost can be greatly reduced without using).

Claims (1)

컨백션 타입의 전자레인지에 있어서, 저항(R1)과 가변저항(R2)과 콘덴서(C1)를 트라이액(MT1)(MT2)에 병렬 연결하고 콘덴선(C1)와 트라이액(MT1)(MT2)간에 게이트 저항(R3)을 연결하여 히타(4)에 연결 구성하여 트라이액(MT1)(MT2)에 인가되는 전류를 제어하도록 구성된 것을 특징으로 하는 전자레인지의 온도 제어 회로.In a microwave oven of the convection type, a resistor R 1 , a variable resistor R 2 , and a capacitor C 1 are connected in parallel to a triac MT 1 MT 2 , and the condensation line C 1 and tri Electron, characterized in that configured to control the current applied to the triac (MT 1 ) (MT 2 ) by connecting the gate resistor (R 3 ) between the liquid (MT 1 ) (MT 2 ) connected to the heater (4) Temperature control circuit of the range.
KR2019880014157U 1988-08-30 1988-08-30 Thermister controlling circuit of microwave oven KR940002509Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880014157U KR940002509Y1 (en) 1988-08-30 1988-08-30 Thermister controlling circuit of microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880014157U KR940002509Y1 (en) 1988-08-30 1988-08-30 Thermister controlling circuit of microwave oven

Publications (2)

Publication Number Publication Date
KR900006016U KR900006016U (en) 1990-03-09
KR940002509Y1 true KR940002509Y1 (en) 1994-04-20

Family

ID=19278870

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880014157U KR940002509Y1 (en) 1988-08-30 1988-08-30 Thermister controlling circuit of microwave oven

Country Status (1)

Country Link
KR (1) KR940002509Y1 (en)

Also Published As

Publication number Publication date
KR900006016U (en) 1990-03-09

Similar Documents

Publication Publication Date Title
US3364338A (en) Oven temperature control
US4338511A (en) Electronic thermostat equipped with an energy-saving device
US4443690A (en) Power control for cooking appliance with transient operating modes
KR850000583B1 (en) Fice cooker-warmer
US4370535A (en) Microwave oven power control system
KR940002509Y1 (en) Thermister controlling circuit of microwave oven
SE7700658L (en) PROCEDURE AND DEVICE FOR REGULATING THE TEMPERATURE OF A POTTERY OVEN OR SIMILAR
US4090664A (en) Tri-state electrical circuit
US3560824A (en) Speed control of an electric motor employing thermally sensitive resistance
GB2048525A (en) Timed control circuit for electric heater
JPS5921610B2 (en) rice cooker control device
CA1196968A (en) Microwave generator cooling apparatus
US3428785A (en) Solid state oven temperature control
JPS6360659B2 (en)
SU1312546A1 (en) Device for controlling temperature
US4323861A (en) Oscillator circuit for controlling the power level of a microwave oven
JPS6454687A (en) Hot air blower with automatic voltage switching
GB2177858A (en) Control system for a domestic heating appliance
JPS623447B2 (en)
JPS6360658B2 (en)
JPH0625798Y2 (en) Room temperature controller
JPS5578311A (en) Temperature control unit
JPS5820967Y2 (en) ondo controller
JPH0435718Y2 (en)
SU995384A1 (en) Device for power supply of resistance electric furnace with silicon carbide heaters

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19961223

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee