KR0126045Y1 - Apparatus for preventing overheating of a rice cooker - Google Patents

Apparatus for preventing overheating of a rice cooker

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Publication number
KR0126045Y1
KR0126045Y1 KR92019590U KR920019590U KR0126045Y1 KR 0126045 Y1 KR0126045 Y1 KR 0126045Y1 KR 92019590 U KR92019590 U KR 92019590U KR 920019590 U KR920019590 U KR 920019590U KR 0126045 Y1 KR0126045 Y1 KR 0126045Y1
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South Korea
Prior art keywords
rice cooker
overheating
microcomputer
heater
temperature
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KR92019590U
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Korean (ko)
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KR940009296U (en
Inventor
전덕구
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구자홍
엘지전자주식회사
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Priority to KR92019590U priority Critical patent/KR0126045Y1/en
Publication of KR940009296U publication Critical patent/KR940009296U/en
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Publication of KR0126045Y1 publication Critical patent/KR0126045Y1/en

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    • 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
    • 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
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0802—Control mechanisms for pressure-cookers
    • 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
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)

Abstract

본 고안은 전기밥솥의 과열을 감지하는 마이컴이 전기적 쇼크 및 노이즈등으로 인해 제어불능 상태가 되었을 경우 상기 마이컴과 무관하게 히터의 통전을 차단시켜 전기밥솥의 과열 및 오동작을 방지하는데 적당한 전기밥솥의 과열 방지장치에 관한 것으로, 전기적 쇼크 및 노이즈에 의해 마이컴(2)이 제어불능 상태일 경우 히터발생부(3)의 릴레이(RL1)(RL2)가 계속 작동하여 전기밥솥의 과열로 인해 화재 및 제품에 손상이 가는 문제점을 해결하기 위한 것이다.The present invention is to prevent the overheating and malfunction of the electric rice cooker to prevent overheating and malfunction of the electric rice cooker by blocking the energization of the heater irrespective of the micom when the microcomputer to detect overheating of the rice cooker becomes uncontrollable due to electric shock and noise. Regarding the prevention device, when the microcomputer 2 is in an uncontrollable state due to electric shock and noise, the relays RL1 and RL2 of the heater generator 3 continue to operate and cause fire and product damage due to overheating of the rice cooker. It is to solve the problem of damage.

본 고안은 이와 같은 종래 문제점을 해결하기 위하여 과열 방지장치를 구비하여 전기밥솥의 과열시 온도감지센서에 의한 추출데이타를 비교기에 입력시켜 과열기준온도를 비교 출력함으로서 마이컴의 출력신호와는 무관하게 히터의 통전을 차단하여 전기밥솥의 과열현상을 방지하도록 한 것으로 전기밥솥에 채용한다.The present invention is provided with an overheat prevention device to solve the conventional problems such as input the extraction data by the temperature sensor during the overheating of the rice cooker to the comparator to compare and output the overheating reference temperature to the heater regardless of the output signal of the microcomputer It is adopted to the electric rice cooker to prevent overheating of the electric rice cooker by blocking the electricity supply.

Description

전기밥솥의 과열 방지장치Overheating prevention device of rice cooker

제 1 도는 종래 전기밥솥의 회로도.1 is a circuit diagram of a conventional rice cooker.

제 2 도는 본 고안 과열 방지장치가 구비된 전기밥솥의 회로도.2 is a circuit diagram of an electric rice cooker equipped with the present invention overheating prevention device.

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

11 : 온도감지부 12 : 마이컴11: temperature detection unit 12: microcomputer

13 : 히터구동부 14 : 비교판단부13: heater driving unit 14: comparison judgment

15 : 조합회로15: combination circuit

본 고안은 전기밥솥의 과열을 감지하는 마이컴이 전기적 쇼크 및 노이즈등으로 인해 제어불능 상태가 되었을 경우 상기 마이컴과 무관하게 히터의 통전을 차단시켜 전기밥솥의 과열 및 오동작을 방지하는데 적당한 전기밥솥의 과열 방지장치에 관한 것이다.The present invention is to prevent the overheating and malfunction of the electric rice cooker to prevent overheating and malfunction of the electric rice cooker by blocking the energization of the heater irrespective of the micom when the microcomputer to detect overheating of the rice cooker becomes uncontrollable due to electric shock and noise. It relates to a prevention device.

종래 전기밥솥은 제 1 도에 도시된 바와 같이 전기밥솥의 내부온도를 검출하는 온도센서(RTH1), 저항(R1)(R2)으로 구성된 온도검지부(1)와, 검출된 전기밥솥의 온도를 제어하는 마이컴(2)과, 마이컴(2)의 제어신호에 의해 전기밥솥의 내부를 발열시키는 저항(R3내지 R6), 트랜지스터(Q1)(Q2), 다이오드(D1)(D2), 히터구동용 릴레이(RL1)(RL2)가 구비된 히터구동부(3)로 구성된 것으로 미설명부호 C1은 콘덴서, ZD1내지 ZD3는 제너다이오드이다.Conventional electric rice cooker is a temperature sensor (1) consisting of a temperature sensor (R TH1 ), a resistor (R1) (R2) for detecting the internal temperature of the electric rice cooker as shown in Figure 1, and the detected temperature of the electric rice cooker For controlling the microcomputer 2 and the resistors R3 to R6 that generate heat inside the rice cooker according to the control signal of the microcomputer 2, transistors Q1 and Q2, diodes D1 and D2, and heater driving. It is composed of a heater driving unit 3 provided with relays RL1 and RL2. Reference numeral C1 denotes a capacitor, and ZD1 to ZD3 denote zener diodes.

이와 같이 구성된 종래 전기밥솥은 제 1 도에서와 같이 먼저, 전기밥솥의 내부온도를 감지하는 온도검지부(1)내의 온도센서(RTH1)는 전기밥솥의 내부 온도변화에 따라 변화된 상기 온도센서(RTH1)의 저항값은 공급전압(VCC)인가시, 저항(R1)(R2)에 의해 분압된 온도변화값(VTH1)은 마이컴(2)의 입력단(C)을 통해 입력된다.In the conventional electric rice cooker configured as described above, as shown in FIG. 1, the temperature sensor R TH1 in the temperature detecting unit 1 for detecting the internal temperature of the electric rice cooker is changed according to the internal temperature change of the electric rice cooker R. When the resistance value of TH1 is applied to the supply voltage VCC, the temperature change value V TH1 divided by the resistors R1 and R2 is input through the input terminal C of the microcomputer 2.

이때 마이컴(2)은 온도검지부(1)에서 감지한 전기밥솥의 내부 온도변화값(VTH1)에 의해 히터구동부(3)내의 트랜지스터(Q1)(Q2)를 온/오프 구동시켜 히터구동용 릴레이(RL1)(RL2)의 통전율을 제어함으로서 히터의 발열이 제어되어 전기밥솥의 취반공정이 진행된다.At this time, the microcomputer 2 drives the transistors Q1 and Q2 in the heater driving unit 3 on / off by the internal temperature change value V TH1 of the electric rice cooker sensed by the temperature detecting unit 1 to relay the heater driving. By controlling the current carrying ratio of (RL1) and (RL2), the heat generation of the heater is controlled to proceed with the cooking process of the rice cooker.

이때 취반공정시 전기밥솥에 과열현상이 발생하여 온도감지부(1)내의 온도센서(RTH1)가 전기밥솥의 내부 온도변화를 감지하면 마이컴(2)은 히터구동부(3)내의 트랜지스터(Q1)(Q2)를 오프시켜 히터구동용 릴레이(RL1)(RL2)의 구동을 차단함으로서 히터의 발열을 오프시켜 전기밥솥의 과열을 방지하도록 한 것이다.At this time, if the overheating phenomenon occurs in the rice cooker during the cooking process and the temperature sensor R TH1 in the temperature sensing unit 1 detects a change in the internal temperature of the rice cooker, the microcomputer 2 performs the transistor Q1 in the heater driving unit 3. By turning off (Q2) to cut off the driving of the heater driving relays (RL1) (RL2), the heating of the heater is turned off to prevent overheating of the rice cooker.

그러나 종래 전기밥솥은 전기적 쇼크 및 노이즈에 의해 마이컴(2)이 제어불능 상태일 경우 히터발생부(3)의 릴레이(RL1)(RL2)가 계속 작동하여 전기밥솥의 과열로 인해 화재 및 제품에 손상이 가는 문제점이 있었다.However, in the conventional electric rice cooker, when the microcomputer 2 is in an uncontrollable state due to electric shock and noise, the relay RL1 (RL2) of the heater generator 3 continues to operate, causing damage to fire and products due to overheating of the rice cooker. There was a problem going this way.

본 고안은 이와 같은 종래 문제점을 해결하기 위하여 과열 방지장치를 구비하여 전기밥솥의 과열시 온도센서에 의한 추출데이타를 비교기에 입력시켜 과열기준온도를 비교 출력함으로서 마이컴의 출력신호와는 무관하게 히터의 통전을 차단하여 전기밥솥의 과열현상을 방지하는데 그 목적이 있는 것으로 첨부된 도면에 의하여 본 고안의 구성 및 작용효과를 설명하면 다음과 같다.The present invention is provided with an overheat prevention device to solve such a conventional problem by inputting the extraction data by the temperature sensor during the overheating of the rice cooker to the comparator to compare and output the overheating reference temperature to the heater regardless of the output signal of the microcomputer Blocking the current to prevent the overheating of the electric rice cooker with the purpose to explain the configuration and effect of the present invention by the accompanying drawings as follows.

먼저, 본 고안 과열 방지장치가 구비된 전기밥솥은 제 2 도에 도시된 바와 같이 전기밥솥의 내부온도를 검출하는 온도센서(RTH2), 저항(R7)(R8)으로 구성된 온도검지부(11)와, 상기 온도검지부(11)에서 검출된 전기밥솥의 내부온도를 입력받아 설정된 기준전압과 비교하여 전기밥솥의 내부온도상태를 판단하는 비교판단부(14)와, 온도검지부(11)에서 검출된 온도 변화값을 입력받고 조합회로(15)를 제어하는 마이컴(12)과, 상기 마이컴(12)의 제어신호와 비교판단부(14)의 비교신호를 입력받아 이를 조합하여 히터구동부(13)를 제어하는 조합회로(15)와, 조합회로(15)에서 조합된 신호에 의해 히터를 구동 제어하는 저항(R13내지 R16), 트랜지스터(Q3)(Q4), 다이오드(D3)(D4), 히터구동용 릴레이(RL3)(RL4)가 구비된 히터구동부(13)로 구성된 것으로 상기 비교판단부(14)는 온도검지부(11)에서 검출된 전기밥솥의 내부 온도변화값을 입력받아 각 저항(R9,R10)(R11,R12)에 의해 과열방지온도값으로 설정된 기준전압과 비교하는 비교기(14A)(14B)로 구성되고, 상기 조합회로(15)는, 각각의 비교기(14A)(14B)에서 비교 출력된 신호를 조합하는 OR게이트(15A)(15C)와, 상기 OR게이트(15A)(15C)에서 조합된 신호를 입력받아 이를 마이컴(12)에서 출력된 제어신호와 조합하는 OR게이트(15B)(15D)로 구성된 것으로, 미설명부호, C2는 트랜지스터 ZD4-ZD6은 제너다이오드이다.First, the electric rice cooker equipped with the present invention overheating prevention device is a temperature detector 11 consisting of a temperature sensor (R TH2 ), a resistor (R7) (R8) for detecting the internal temperature of the rice cooker as shown in FIG. And, the input and the internal temperature of the electric rice cooker detected by the temperature detection unit 11 is compared with the set reference voltage to determine the internal temperature state of the electric rice cooker 14 and detected by the temperature detector 11 The heater driver 13 is configured by receiving the temperature change value and controlling the combination circuit 15 and the control signal of the microcomputer 12 and the comparison signal of the comparison determination unit 14. Combination circuit 15 to control, resistors R13 to R16, transistors Q3 (Q4), diodes D3 (D4), and heater drive for driving control of the heater by the combined signal from combination circuit 15 It is composed of a heater driving unit 13 provided with a relay (RL3) (RL4) for the comparison determination unit 14 is a temperature test To the comparator 14A (14B) receiving the internal temperature change value of the electric rice cooker detected by the unit 11 and comparing it with the reference voltage set as the overheat prevention temperature value by each resistor (R9, R10) (R11, R12). The combination circuit 15 is composed of OR gates 15A and 15C for combining the signals output from the comparators 14A and 14B, and combined with the OR gates 15A and 15C. It consists of OR gates 15B and 15D that receive a signal and combine it with a control signal output from the microcomputer 12, where reference numeral C2 denotes a transistor ZD4-ZD6 which is a zener diode.

이와 같이 구성된 본 고안의 작용효과는 제 2 도에 도시된 바와 같이 먼저 전기밥솥의 내부온도를 감지하는 온도검지부(11)내의 온도센서(RTH2)는 전기밥솥의 내부 온도변화에 따라 변화된 상기 온도센서(RTH2)의 저항값은 전압(VCC)인가시, 저항(R7)(R8)에 의해 분압된 온도변화값(VTH2)으로 비교판단부(14)의 각 비교기(14A)(14B)에 인가된다.As shown in FIG. 2, the temperature sensor R TH2 in the temperature detection unit 11 that detects the internal temperature of the electric rice cooker is changed in accordance with the internal temperature change of the electric rice cooker. The resistance value of the sensor R TH2 is the temperature change value V TH2 divided by the resistors R7 and R8 when the voltage VCC is applied, and each comparator 14A and 14B of the comparison determination unit 14. Is applied to.

따라서 비교기(14A)(14B)의 (+)단자에는 저항(R9,R10)(R11,R12)에의 기준전압(약 0.4V)을 만들어준 후, 상기 기준 전압값을 과열방지온도(예: 170℃)값으로 정한다.Therefore, after the reference voltage (approximately 0.4V) is made to the resistors R9, R10 (R11, R12) at the (+) terminals of the comparators 14A, 14B, the reference voltage value is converted into an overheat prevention temperature (for example, 170). (Degree C) value.

이때 전기밥솥이 정상상태일 경우 비교기(14A)의 (-)단자에 입력되는 온도검지부(11)에서 검출된 온도변화값의 레벨이 (+)단자에 입력되는 저항(R9,R10)에 의해 설정된 기준전압값의 레벨보다 높기 때문에 로우신호가 출력되며, 비교기(14B)의 (-)단자 레벨도 (+)단자 레벨보다 높기 때문에 마찬가지로 로우신호가 출력된다.At this time, when the rice cooker is in a normal state, the level of the temperature change value detected by the temperature detector 11 inputted to the negative terminal of the comparator 14A is set by the resistors R9 and R10 inputted to the positive terminal. The low signal is output because it is higher than the level of the reference voltage value, and the low signal is similarly output because the negative terminal level of the comparator 14B is higher than the positive terminal level.

따라서 조합회로부(15)의 OR게이트(15A)(15C)는 각 비교기(14A)(14B)에서 출력된 로우신호를 조합함으로서 상기 OR게이트(15A)(15B)에서는 로우신호가 출력된다.Therefore, the OR gates 15A and 15C of the combination circuit unit 15 combine the low signals output from the comparators 14A and 14B, so that the low signals are output from the OR gates 15A and 15B.

한편 마이컴(12)은 입력단(C-1)을 통해 온도검지부(11)의 온도변화값(VTH2)을 입력받아 현재 전기밥솥의 내부온도를 판단한 후, 히터구동부(13)의 히터를 구동시키고자 할 경우 상기 마이컴(12)은 출력단(A-1)(B-2)을 통해 조합회로부(15)내의 OR게이트(15B)(15C)에 로우신호를 출력시키면, 상기 OR게이트(15B)(15D)는 OR게이트(15A)(15C)에서 출력된 로우신호와 마이컴(12)에서 출력된 로우신호를 조합함으로서 최종적으로 로우신호가 출력되어 히터구동부(13)내의 트랜지스터(Q3)(Q4)가 온되어 히터구동용 릴레이(RL3)(RL4)가 작동함으로서 히터가 발열하며, 히터구동을 차단하고자 할 경우에는 상기 마이컴(12)은 OR게이트(15B)(15D)에 하이신호를 출력시켜 히터구동을 차단시킨다.Meanwhile, the microcomputer 12 receives the temperature change value V TH2 of the temperature detector 11 through the input terminal C-1, determines the current temperature of the electric rice cooker, and then drives the heater of the heater driver 13. If the microcomputer 12 outputs a low signal to the OR gates 15B and 15C in the combined circuit unit 15 through the output terminals A-1 and B-2, the OR gate 15B ( 15D) combines the low signal output from the OR gates 15A and 15C and the low signal output from the microcomputer 12, thereby finally outputting the low signal, so that the transistors Q3 and Q4 in the heater driver 13 are provided. When the heater driving relays RL3 and RL4 are turned on to generate heat, the microcomputer 12 outputs a high signal to the OR gates 15B and 15D to block the heater driving. To block.

따라서 사용자가 전기밥솥을 정상상태로 작동시키고자 할 때 조합회로(15)의 OR게이트(15B)(15D)는 OR게이트(15A)(15C)의 출력신호가 로우상태이므로 마이컴(12)의 출력단(A-1)(B-1)의 출력신호에 따라 결정된다.Therefore, when the user wants to operate the rice cooker in the normal state, the output signal of the microcomputer 12 is OR gate 15B, 15D of the combination circuit 15 because the output signal of the OR gate 15A, 15C is low. It is determined according to the output signal of (A-1) (B-1).

즉, 마이컴(12)의 출력단(A-1)(B-1)에 로우신호가 출력될 때 조합회로(15)의 OR게이트(15B)(15D)의 출력신호는 로우가 되어 히터구동부(13)내의 트랜지스터(Q3)(Q4)가 온되어 히터구동용 릴레이(RL3)(RL4)에 의해 구동한다.That is, when the low signal is output to the output terminals A-1 (B-1) of the microcomputer 12, the output signal of the OR gates 15B and 15D of the combination circuit 15 becomes low and the heater driver 13 Transistors Q3 and Q4 are turned on and driven by heater driving relays RL3 and RL4.

한편 마이컴(12)의 출력단(A-1)(B-1)에 하이신호가 출력되면 조합회로(15)의 OR게이트(15B)(15D)의 출력신호는 하이가 되어 히터구동부(3)내의 트랜지스터(Q3)(Q4)가 오프되면서 히터구동용 릴레이(RL3)(RL4)가 오프되어 히터구동을 차단시킨다.On the other hand, when a high signal is output to the output terminals A-1 (B-1) of the microcomputer 12, the output signals of the OR gates 15B and 15D of the combination circuit 15 become high, and thus, in the heater driver 3, As the transistors Q3 and Q4 are turned off, the heater driving relays RL3 and RL4 are turned off to block the heater driving.

이때 사용자가 전기밥솥을 정상적으로 사용시 과열되어 비교기(14A)(14B)의 (+)단자 레벨이 (-)단자 레벨보다 높을 경우 상기 비교기(14A)(14B)에서는 하이신호가 출력됨으로서 조합회로(15)내의 OR게이트(15A)(15C)에서도 하이신호가 출력된다.At this time, when the user uses the electric rice cooker normally, if the (+) terminal level of the comparator 14A (14B) is higher than the (-) terminal level, the comparator 14A (14B) outputs a high signal so that the combined circuit 15 A high signal is also output from the OR gates 15A and 15C in the parentheses.

따라서 OR게이트(15B)(15D)에서도 하이신호가 출력되어 마이컴(12)의 출력단(A-1)(B-1)에서 출력되는 신호(예 : 로우신호)와는 무관하게 히터구동부(13)내의 트랜지스터(Q3)(Q4)가 오프되면서 히터구동용 릴레이(RL3)(RL4)가 오프되어 히터구동을 차단시킨다.Therefore, the high signal is also output from the OR gates 15B and 15D, and the signal is output from the output terminal A-1 (B-1) of the microcomputer 12 (for example, a low signal) regardless of the signal in the heater driver 13. As the transistors Q3 and Q4 are turned off, the heater driving relays RL3 and RL4 are turned off to block the heater driving.

또한 온도검지부(11)의 온도센서(RTH2)가 오프되었을 경우 비교판단부(14)에 구비된 각 비교기(14A)(14B)의 (+)단자 레벨이 (-)단자 레벨보다 높아 하이신호가 출력되어 마이컴(12)의 출력된(A-1)(B-1)에서 출력되는 신호와는 무관하게 조합회로(15)의 OR게이트(15A내지 15D)의 출력신호는 하이가 되어 히터구동부(13)를 오프시키므로서 히터구동을 차단한다.In addition, when the temperature sensor R TH2 of the temperature detection unit 11 is turned off, the positive terminal level of each of the comparators 14A and 14B included in the comparison determination unit 14 is higher than the (-) terminal level, thereby high signal. Is output and the output signal of the OR gate 15A-15D of the combination circuit 15 becomes high regardless of the signal output from (A-1) (B-1) output of the microcomputer 12 and the heater driver. The heater drive is interrupted by turning off (13).

이상에서 설명한 바와 같이 전기밥솥이 과열시 온도센서에 의한 추출데이타를 비교기에 인가하여 과열기준온도로 비교 출력됨으로서 마이컴의 출력신호와는 무관하게 히터의 통전을 차단함으로서 전기밥솥의 과열현상을 방지할 수 있는 효과가 있다.As described above, when the rice cooker overheats, the extraction data by the temperature sensor is applied to the comparator to be compared and output to the reference temperature of the superheater, thereby preventing the overheating of the rice cooker by blocking the energization of the heater regardless of the output signal of the microcomputer. It can be effective.

Claims (2)

전기밥솥의 내부온도를 검출하는 온도검지부(11)와, 검출된 온도를 비교 판단하는 비교판단부(14)와, 상기 온도검지부(11)에서 검출된 온도를 감지하는 마이컴(12)과, 마이컴(12)의 감지신호와 비교판단부(14)의 비교신호를 조합하는 조합회로(15)와, 조합된 신호에 의해 히터를 구동시키는 히터구동부(13)로 구성된 전기밥솥의 과열 방지장치.A temperature detection unit 11 for detecting an internal temperature of the rice cooker, a comparison determination unit 14 for comparing and determining the detected temperature, a microcomputer 12 for detecting a temperature detected by the temperature detection unit 11, and a microcomputer The overheat prevention device of the rice cooker which consists of the combination circuit 15 which combines the detection signal of (12) and the comparison signal of the comparison determination part 14, and the heater drive part 13 which drives a heater by the combined signal. 제 1 항에 있어서, 마이컴(12)의 온도감지신호와는 무관하게 비교판단부(14)에서 비교판단된 신호에 의해 히터구동부(13)가 온/오프 구동제어되는 것을 특징으로 한 전기밥솥의 과열 방지장치.The electric rice cooker of claim 1, wherein the heater driving unit 13 is controlled to be turned on and off by a signal determined by the comparison determination unit 14 regardless of the temperature sensing signal of the microcomputer 12. Overheat protection.
KR92019590U 1992-10-12 1992-10-12 Apparatus for preventing overheating of a rice cooker KR0126045Y1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030068672A (en) * 2002-02-15 2003-08-25 엘지전자 주식회사 An electric iron pot
KR100779429B1 (en) * 2006-05-15 2007-11-28 조윤남 Superheating prevention system and the method of cooker
KR100920647B1 (en) * 2009-05-07 2009-10-07 주식회사 지에스홈쇼핑 Overheating preventive temperature control circuit and the method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030068672A (en) * 2002-02-15 2003-08-25 엘지전자 주식회사 An electric iron pot
KR100779429B1 (en) * 2006-05-15 2007-11-28 조윤남 Superheating prevention system and the method of cooker
KR100920647B1 (en) * 2009-05-07 2009-10-07 주식회사 지에스홈쇼핑 Overheating preventive temperature control circuit and the method

Also Published As

Publication number Publication date
KR940009296U (en) 1994-05-17

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