KR960010682Y1 - Center sensor detecting circuit - Google Patents
Center sensor detecting circuit Download PDFInfo
- Publication number
- KR960010682Y1 KR960010682Y1 KR2019940002441U KR19940002441U KR960010682Y1 KR 960010682 Y1 KR960010682 Y1 KR 960010682Y1 KR 2019940002441 U KR2019940002441 U KR 2019940002441U KR 19940002441 U KR19940002441 U KR 19940002441U KR 960010682 Y1 KR960010682 Y1 KR 960010682Y1
- Authority
- KR
- South Korea
- Prior art keywords
- microcomputer
- rice cooker
- center sensor
- rice
- relay
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/004—Cooking-vessels with integral electrical heating means
-
- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
- H05B1/0261—For cooking of food
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 마이컴 10a : A/D변환기10: microcomputer 10a: A / D converter
20 : 광센서 30 : 릴레이20: light sensor 30: relay
TH : 서미스터 R1-R3: 저항TH: Thermistor R 1 -R 3 : Resistance
본 고안은 전기밥솥에 관한 것으로 특히 밥솥의 중앙에 설치된 센터센서를 광센서와 릴레이를 사용하여 밥솥의 온도를 감지하기 위한 센터센터감지회로에 관한 것이다.The present invention relates to an electric rice cooker, and in particular, to a center sensor installed in the center of the rice cooker to detect the temperature of the rice cooker using a light sensor and a relay.
종래의 전기밥솥은 센터센서 상위의 밥통에 내용물이 담겨 무거워지면 밥통이 스프링의 인장력을 이겨 내려와 철판이 자석과 연동되어 작동되는 리드스위치를 차단하여 자력선을 끊으므로서 상기 리드스위치가 오프(OFF)되어 전기적으로 온도변화에 민감한 서미스터가 온(ON)이 되므로 전류패스가 형성되어 전압이 마이컴으로 유기된다.In the conventional electric rice cooker, when the contents are contained in the upper bowl of the center sensor and become heavy, the rice bowl overcomes the tension of the spring, and the reed switch is turned off by breaking the magnetic force line by blocking the reed switch operated by the iron plate interlocking with the magnet. Since the thermistor sensitive to temperature change is turned on, a current path is formed and the voltage is induced to the microcomputer.
또한 밥통을 제거하면 스프링이 인장력으로 인해 철판이 위로 상승하므로 철판이 빠져 자력선이 형성되어 리드스위치가 온(ON)이 된다. 따라서 서미스터로 전류통로가 형성되지 않고 리드스위치로 전류통로가 형성되었으나 상기 리드스위치가 결함이 많아 오동작을 자주 일으켜 과부하가 발생되어 밥통에 밥이 눌러붙는다든가 바열체가 파손되는 등의 문제점이 발생되었던 것이다.In addition, when the rice bowl is removed, the spring rises up the iron plate due to the tensile force, so the iron plate is pulled out to form a magnetic force line, the reed switch is turned on. Therefore, the current path is not formed by the thermistor, but the current path is formed by the reed switch. However, the reed switch is defective and frequently causes malfunctions, resulting in overloading, which causes rice to stick to the rice bowl or break the heating element. .
본 고안에서는 자석과 리드스위치 대용으로 신뢰성이 우수한 광센서와 광센서가 차단되면 온(ON)이 되는 릴레이를 사용하여 밥통의 온도를 감지하여 밥이 밥통에 눌러붙는 것을 방지하고 밥솥의 파손을 미연에 방지하여 제품의 신뢰성을 향상시키는데 그 목적이 있다.In the present invention, a reliable optical sensor instead of a magnet and a reed switch and a relay that is turned on when the optical sensor is cut off senses the temperature of the rice bowl to prevent the rice from sticking to the rice bowl and prevents damage of the rice cooker. The purpose is to improve the reliability of the product by preventing.
이를 첨부도면에 의해 설명한다.This will be described with reference to the accompanying drawings.
내용물이 들어 있는 밥통이 밥솥에 삽입되면 차단되는 광센서(20)를 취사 및 보온을 콘드하는 마이컴(10)에 연결하고, 상기 마이컴(10)에 광센서(10) 차단시 온(ON)이 되는 트랜지스터(TR)와 릴레이(30) 코일(L)을 직렬연결하고, 온도변화에 민감한 서미스터(TH)를 릴레이(20) 스위치접점단자와 아날로그신호를 디지탈신호로 바꾸어 입력하는 A/D변환기(10a)를 통해 마이컴(10)에 연결되게 구성한다.When the rice container containing the contents is inserted into the rice cooker, the optical sensor 20 which is blocked is connected to the microcomputer 10 for cooking and warming, and when the optical sensor 10 is blocked by the microcomputer 10, the ON is ON. A / D converter that connects the transistor TR and the relay 30 coil L in series, and converts the thermistor TH sensitive to temperature change into a digital signal by switching the switch contact terminal of the relay 20 with an analog signal ( It is configured to be connected to the microcomputer 10 through 10a).
도면의 설명중 미설명부호 저항(R1,R2)은 광센서(20)를 보호하기 위한 저항이고, 저항(R2)은 마이컴(10)에 입력되는 값을 보호하기 위한 저항이다.Unexplained resistors R 1 and R 2 in the description of the drawings are resistors for protecting the optical sensor 20, and resistors R 2 are resistors for protecting a value input to the microcomputer 10.
이하 본 고안의 작용 및 효과를 설명한다.Hereinafter will be described the operation and effect of the present invention.
전원(Vcc)이 인가된 상태에서 내용물이 들어있는 밥통을 전기밥솥에 삽입하면 밥통이 인장스프링력을 이겨센터센서에 설치된 광센서(20)가 전기밥솥의 하부에 설치된 철판에 의해 발광부에서 수광부로 전달되는 빛이 차단되므로 마이컴(10)은 이를 감지하여 일정전압을 트랜지스터(TR) 베이스에 인가하여 상기 트랜지스터(TR)를 도통시키므로 콜렉터에 연결된 릴레이(30)가 온(ON)이 된다.When the power supply (Vcc) is inserted into the rice cooker containing the contents into the electric rice cooker, the rice bowl beats the tension spring force, the light sensor 20 installed in the center sensor is a light receiving part in the light emitting part by the iron plate installed in the lower part of the rice cooker Since light transmitted to the microcomputer 10 is blocked, the microcomputer 10 senses this and applies a constant voltage to the base of the transistor TR to conduct the transistor TR so that the relay 30 connected to the collector is turned on.
따라서 릴레이(30)가 온(ON)이 되므로 전류가 온도변화에 민감한 서미스터(TH)와 릴레이(30) 접점단자를 경유하여 전류패스가 형성되어 일정전압을 A/D변환기(10a)를 통해 아날로그신호를 디지탈신호로 변환하여 마이컴(10)에 인가하므로서 상기 마이컴(10)이 밥솥의 온도를 정확하게 감지하여 입력된 프로그램에 의해 취사 및 보온을 행한다.Therefore, since the relay 30 is turned on, a current path is formed through the thermistor TH and the relay 30 contact terminal, where the current is sensitive to temperature change, thereby converting a constant voltage through the A / D converter 10a. By converting a signal into a digital signal and applying it to the microcomputer 10, the microcomputer 10 accurately senses the temperature of the rice cooker and performs cooking and warming by an input program.
상술한 바와 같이 본 고안은 전기밥솥에 사용되는 자석과 리드스위치 대신 신뢰성이 우수한 광센서와 광센서차단시 온(ON)이 되는 릴레이를 사용하여 밥솥의 온도를 정확하게 감지하여 오작동 및 과열로 인한 밥솥의 파손을 미연에 방지할 수 있는 유익한 고안이다.As described above, the present invention uses a highly reliable optical sensor and a relay that is turned on when the optical sensor is blocked, instead of the magnet and the reed switch used in the electric rice cooker, accurately detecting the temperature of the rice cooker due to malfunction and overheating. It is an advantageous design that can prevent the damage in advance.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940002441U KR960010682Y1 (en) | 1994-02-08 | 1994-02-08 | Center sensor detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940002441U KR960010682Y1 (en) | 1994-02-08 | 1994-02-08 | Center sensor detecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950024406U KR950024406U (en) | 1995-09-13 |
| KR960010682Y1 true KR960010682Y1 (en) | 1996-12-26 |
Family
ID=19377059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019940002441U KR960010682Y1 (en) | 1994-02-08 | 1994-02-08 | Center sensor detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR960010682Y1 (en) |
-
1994
- 1994-02-08 KR KR2019940002441U patent/KR960010682Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR950024406U (en) | 1995-09-13 |
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