KR940003234Y1 - Humidity sensor for a microwave range - Google Patents

Humidity sensor for a microwave range Download PDF

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Publication number
KR940003234Y1
KR940003234Y1 KR92002485U KR920002485U KR940003234Y1 KR 940003234 Y1 KR940003234 Y1 KR 940003234Y1 KR 92002485 U KR92002485 U KR 92002485U KR 920002485 U KR920002485 U KR 920002485U KR 940003234 Y1 KR940003234 Y1 KR 940003234Y1
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KR
South Korea
Prior art keywords
humidity sensor
voltage
resistor
input
diode
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KR92002485U
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Korean (ko)
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KR930020090U (en
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최진규
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강진구
삼성전자 주식회사
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Priority to KR92002485U priority Critical patent/KR940003234Y1/en
Priority to JP005945U priority patent/JPH0635960U/en
Publication of KR930020090U publication Critical patent/KR930020090U/en
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Publication of KR940003234Y1 publication Critical patent/KR940003234Y1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/6458—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using humidity or vapor sensors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

내용 없음.No content.

Description

전자레인지의 습도센서 구동회로Microwave humidity sensor drive circuit

제1도는 본 고안에 적용되는 전자레인지의 습도센서 구동회로도.1 is a humidity sensor driving circuit of a microwave oven applied to the present invention.

제2도는 본 고안에 습도센서 구동회로의 입출력 파형도.2 is an input / output waveform diagram of a humidity sensor driving circuit according to the present invention.

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

C1,C2 : 콘덴서 D1,D2 : 다이오드C1, C2: Capacitor D1, D2: Diode

R1-R5 : 저항 RS : 습도센서R1-R5: Resistance RS: Humidity Sensor

LVT : 저전압트랜스 ZD1,ZD2 : 제너다이오드LVT: Low voltage transformer ZD1, ZD2: Zener diode

가 : 습도센서부 나 : 마이콤A: Humidity sensor part B: Micom

본 고안은 전자레인지의 습도센서 구동회로에 관한 것으로, 특히 조리되는 음식물의 습도상태를 감지하기 위한 습도센서의 감도를 향상시켜줄 수 있도록 한 전자레인지의 습도센서 구동회로에 관한것이다.The present invention relates to a humidity sensor driving circuit of a microwave oven, and more particularly to a humidity sensor driving circuit of a microwave oven to improve the sensitivity of the humidity sensor for detecting the humidity of the cooked food.

종래의 전자레인지의 습도센서 구동회로는 그 구동회로가 복잡할 뿐만아니라 , 입력되는 교류전압으로 부터 정류부르 통해서 입력되는 정전압에 의하여 구동하도록 되어 있는 관계로 허용되는 전압 범위 내에서 구동하기 때문에, 습도센서의 감도가 정확하지 못한 문제점을 가지고 있었다.The humidity sensor driving circuit of a conventional microwave oven is not only complicated in its driving circuit but also driven within the allowable voltage range because it is driven by the constant voltage inputted through the rectifier from the input AC voltage. The sensitivity of the sensor was inaccurate.

따라서 본고안의 목적은 조리되는 음식물의 습도를 감지하는 습도 센서의 감도를 향상 시켜 음식물의 조리를 정확히 할수 있도록 하는데 있으며, 상기의 목적을 실현하기 위하여 본 고안은 입력되는 교류전압을 정전압 다이오드를 통해서 허용전압으로 클리핑하고, 저항과 콘덴서의 충방전을 이용하여 습도센서의 감도를 향상시키도록 한것을 특징으로 한다.Therefore, the purpose of this paper is to improve the sensitivity of the humidity sensor that detects the humidity of the food to be cooked, so that the food can be cooked accurately. To realize the above object, the present invention allows the input AC voltage through the constant voltage diode. Clipping to voltage, and using the charge and discharge of the resistor and the condenser to improve the sensitivity of the humidity sensor.

이하 첨부된 도면의 의거 본 고안을 상세히 설명하면 다음과 같다. 제1도는 본 고안에 적용되는 습도센서의 구동회로 로서, 입력되는 교류전압단(AC)에 연결된 저전압트랜스(LVT)의 2차측에 디바이드 저항(R1)을 통해서 입력전압의 클리핑을 위한 제너 다이오드(ZD1),(ZD2)를 서로 대응 되는 방향으로 연결하고, 상기 제너다이오드 (ZD1),(ZD2)의 에노우드단자 측에는 습도센서(RS), 전류 분할용 저항(R4), 다이오드 (D1),(D2), 충전용콘덴서(C1)(C2) 방전용저항(R2),(R3)로 구성되는 습도센서부(RS)와 전류 제한용 저항(R5)을 통해서 마이콤(나)의 입력단자에 연결하여서 된것이다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a driving circuit of a humidity sensor according to the present invention, and a zener diode for clipping an input voltage through a divide resistor R1 at a secondary side of a low voltage transformer LVT connected to an input AC voltage terminal AC. ZD1) and (ZD2) are connected to each other in a direction corresponding to each other, and the humidity sensor RS, current splitting resistor R4, diode D1, (on the zener diodes ZD1 and ZD2) D2), the charging capacitor (C1) (C2) connected to the input terminal of the microcomputer (B) through the humidity sensor section (RS) consisting of the discharge resistor (R2), (R3) and the current limiting resistor (R5) It was done.

상기와 같이 구성하여서 된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.If described in detail the effect of the present invention made by configuring as described above.

먼저, 전자레인지에 전원을 인가 시키면 교류입력단(AC)에는 소정의 교류전압이 입력되고 이입력된 교류전압은 저전압트랜스(LVT)의 1,2차측을 통해서 낮추어져 상기 저전압트랜스(LVT)의 2차측에는 제2a도에 도시한 바와같이, 교류전압 파형이 나타나게 되고 이교류전압은 디바이더저항(R1)을 통해서 클리핑을 위한 제너다이오드 (ZD1),(ZD2)에 의하여 제2b도에 도시한 바와같이 클리핑 된 교류전압이 나타나게 된다. 이와같이 입력되는 교류전압을 클리핑 하는 이유는 습도센서(RS)가 허용전압이 이하의 교류전압이 요구되기 때문이다.First, when power is supplied to the microwave oven, a predetermined AC voltage is input to the AC input terminal AC, and the input AC voltage is lowered through the primary and secondary sides of the low voltage transformer LVT, thereby reducing the voltage of the low voltage transformer LVT. As shown in FIG. 2A, the AC voltage waveform is shown on the vehicle side, and the cross-flow voltage is shown by the zener diodes ZD1 and ZD2 for clipping through the divider resistor R1 as shown in FIG. 2B. The clipped AC voltage will appear. The reason for clipping the input AC voltage is that the humidity sensor RS requires an AC voltage of less than the allowable voltage.

상기와 같이 클리핑된 교류전압은 상기 습도센서부(가)의 습도센서(RS), 전류분할용 저항(R4)을 통해서 처음 반파전압은 다이오드(D2)를 통해서 콘덴서(C2)에 충전되고, 다음의 반파전압은 다이오드(D1)를 통해서 콘덴서(C1)에 충전된다.As described above, the clipped AC voltage is charged through the humidity sensor RS of the humidity sensor unit A and the current splitting resistor R4, and the first half-wave voltage is charged to the capacitor C2 through the diode D2. The half-wave voltage of is charged in the capacitor C1 through the diode D1.

이때 상기 다이오드(D1),(D2), 콘덴서(C1),(C2), 그리고 방전용저항(R2),(R3)은 서로 동일규격치를 사용하여 상기 습도센서(RS)에 걸리는 전압을 대칭이 도게하고, 상기 방전용저항(R3)과 콘덴서(C2)의 시정수를 조정시켜, 상기 콘덴서(C1),(C2)에 충전되는 전압을 방전 시킴으로써, 상기 습도센서부(가)에서 출력되는 전압을 DC에 가까운 전압을 출력시켜 전류제한용 저항(R5)을 통해서 마이콤(나)에 입력시켜 줌으로써, 상기 마이콤(나)에서는 정확한 습도를 감지할 수 있게되는 이다.At this time, the diodes (D1), (D2), capacitors (C1), (C2), and discharge resistors (R2), (R3) use the same standard value and the voltage across the humidity sensor (RS) is symmetrical. And the time constants of the discharge resistor R3 and the capacitor C2 are adjusted to discharge the voltage charged in the capacitors C1 and C2, thereby outputting the voltage from the humidity sensor unit A. By outputting a voltage close to DC and input to the microcomputer (na) through the current limiting resistor (R5), it is to be able to detect the exact humidity in the microcomputer (na).

이상에서 설명한 바와같이 본 고안은 입력되는 교류전압을 제너다이오드를 이용하여 클리핑 시키고 이 클리핑된 전압은 습도센서를 통해 교호로 충방전되는 저항과 콘덴서를 이용하여 상기 습도센서로 감지된 전압을 직류에 가까운 파형의 전압으로 만들어 마이콤에 입력시킴으로써, 보다 정확한 습도를 감지할 수 있는 효과를 제공하게 되는 것이다.As described above, the present invention clips the input AC voltage by using a zener diode, and the clipped voltage uses a resistor and a capacitor which are alternately charged and discharged through a humidity sensor to convert the voltage detected by the humidity sensor to a DC. By inputting the voltage to the microcomputer with the voltage of the near waveform, it provides the effect of detecting more accurate humidity.

Claims (1)

입력되는 교류전압단(AC)에 연결되는 저전압트랜스(LVT)의 2차측에는 다이오드저항(R1)을 통해서 클리핑용 제너다이오드(ZD1),(ZD2)를 연결시키고 이제너다이오드(ZD1),(ZD2)의 에노우드단자에는 습도센서(RS), 저항(R4), 다이오드(D1),(D2), 콘덴서(C2),(C1), 방전용 저항(R2),(R3)으로 구성된 습도센서부(가)와, 전류제한용저항(R5)을 통해서 마이콤(나)의 입력단자에 연결시켜서된 것을 특징으로 하는 전자레인지의 습도센서 구동회로.The zener diodes ZD1 and ZD2 for clipping are connected to the secondary side of the low voltage transformer LVT connected to the input AC voltage terminal AC, and now the diodes ZD1 and ZD2 are connected. ), Humidity sensor (RS), resistor (R4), diode (D1), (D2), capacitor (C2), (C1), discharge resistor (R2), (R3) (A) and a humidity sensor drive circuit of a microwave oven, which is connected to an input terminal of a microcomputer (b) through a current limiting resistor (R5).
KR92002485U 1992-02-20 1992-02-20 Humidity sensor for a microwave range KR940003234Y1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR92002485U KR940003234Y1 (en) 1992-02-20 1992-02-20 Humidity sensor for a microwave range
JP005945U JPH0635960U (en) 1992-02-20 1993-02-22 Humidity sensing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR92002485U KR940003234Y1 (en) 1992-02-20 1992-02-20 Humidity sensor for a microwave range

Publications (2)

Publication Number Publication Date
KR930020090U KR930020090U (en) 1993-09-24
KR940003234Y1 true KR940003234Y1 (en) 1994-05-16

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KR92002485U KR940003234Y1 (en) 1992-02-20 1992-02-20 Humidity sensor for a microwave range

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KR (1) KR940003234Y1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996444A (en) * 1982-11-24 1984-06-02 Toyota Motor Corp Fuel injection control method for internal-combustion engine
JPH0334684U (en) * 1989-08-07 1991-04-04

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JPH0635960U (en) 1994-05-13
KR930020090U (en) 1993-09-24

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