KR20070114983A - Method preventing for over heating of inverter microwave oven - Google Patents

Method preventing for over heating of inverter microwave oven Download PDF

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Publication number
KR20070114983A
KR20070114983A KR1020060048705A KR20060048705A KR20070114983A KR 20070114983 A KR20070114983 A KR 20070114983A KR 1020060048705 A KR1020060048705 A KR 1020060048705A KR 20060048705 A KR20060048705 A KR 20060048705A KR 20070114983 A KR20070114983 A KR 20070114983A
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South Korea
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magnetron
temperature
microwave oven
frequency output
inverter microwave
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KR1020060048705A
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Korean (ko)
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윤병길
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주식회사 대우일렉트로닉스
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Priority to KR1020060048705A priority Critical patent/KR20070114983A/en
Publication of KR20070114983A publication Critical patent/KR20070114983A/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
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature 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
    • H05B6/662—Aspects related to the boost transformer of the microwave heating apparatus
    • 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
    • H05B6/666—Safety circuits
    • 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
    • H05B6/68—Circuits for monitoring or control
    • H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

A method for preventing an over-heating effect of an inverter microwave oven is provided to operate continuously a magnetron by preventing previously an over-heating effect of a magnetron. A cooking process is performed(S10). A high voltage supply process is performed to apply a high voltage to a magnetron by using AC power(S20). A temperature sensing unit installed at the magnetron senses the temperature of the magnetron(S30). The temperature of the magnetron is compared with a set value when the temperature of the magnetron is inputted from the temperature sensing unit(S40). The magnetron controls an output control unit in order to reduce the high voltage applied to the magnetron when the temperature of the magnetron belongs to the set value(S50).

Description

인버터 전자레인지 과열방지방법{Method preventing for over heating of inverter microwave oven}Method for over heating of inverter microwave oven

도 1 은 본 발명에 따른 인버터 전자레인지의 블럭 구성도. 1 is a block diagram of an inverter microwave oven according to the present invention;

도 2 는 본 발명에 따른 인버터 전자레인지 과열방지방법의 순서도. 2 is a flow chart of the inverter microwave overheating prevention method according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10: 필터부 20: 정류부10: filter unit 20: rectifying unit

30: 고압트랜스 40: 마그네트론 발진부30: high voltage transformer 40: magnetron oscillation unit

50: 스위칭부 60: 출력제어부50: switching unit 60: output control unit

70: 마이컴 80: 온도감지부70: microcomputer 80: temperature detection unit

본 발명은 인버터 전자레인지에 관한 것으로서, 더욱 상세하게는 인버터 전자레인지의 마그네트론 온도를 제어하는 인버터 전자레인지 과열방지방법에 관한 것이다. The present invention relates to an inverter microwave oven, and more particularly to an inverter microwave overheat prevention method for controlling the magnetron temperature of the inverter microwave oven.

최근 전기밥솥, 공기조화기, 냉장고 등 대부분의 가전제품이 인버터 구동방식을 적용함으로서, 높은 에너지 사용 효율과 성능 향상 등을 꾀하고 있다. 이것은 전기밥솥, 공기조화기, 냉장고와 같은 생활의 편의 제품이 점차적으로 확대, 사용되면서 소비자들이 높은 에너지 사용 효율과 성능 향상 및 사용에 편리한 가전제품을 요구하기 때문이다. Recently, most home appliances such as electric rice cookers, air conditioners, refrigerators, etc. are applying inverter driving methods, and thus, high energy use efficiency and performance are being improved. This is because consumer convenience products such as rice cookers, air conditioners and refrigerators are gradually being expanded and used, and consumers are demanding high energy use efficiency, improved performance, and convenient home appliances.

이러한 인버터 제어는 전자레인지에도 적용된다. 전자레인지는 전류의 공급에 의하여 고주파를 발생시키고, 이러한 고주파를 조리물에 조사하는 것에 의하여 조리물을 가열하는 장치이다. 따라서, 인버터 전자레인지는 구동원인 마그네트론의 고주파 출력량을 가변하여 조리물을 가열한다. This inverter control also applies to a microwave oven. A microwave oven is a device that generates a high frequency by supplying a current, and heats the food by irradiating the high frequency to the food. Therefore, the inverter microwave oven heats the food by varying the high frequency output of the magnetron as the driving source.

여기서, 마그네트론은 내부 히터가 정상 발열이 이루어진 후에야 비로소 마그네트론의 양극에 전류가 흐르게 되면서 고주파 출력을 발진하는데, 이 때 발생되는 전류를 양극전류라 하며, 양극전류의 곱과 양극전압의 곱이 마그네트론에 인가되는 전력이 된다. 따라서 상기한 전력에 마그네트론의 효율이 곱해지면, 그 크기에 따라서 고주파 출력량이 결정된다. Here, the magnetron generates high frequency output when current flows to the anode of the magnetron only after the internal heater is normally heated.The current generated at this time is called the anode current, and the product of the anode current and the anode voltage is applied to the magnetron. To become power. Therefore, when the above power is multiplied by the efficiency of the magnetron, the high frequency output amount is determined according to the magnitude.

하지만, 이러한 인버터 전자레인지는 높은 고전력에 의해 마그네트론이 구동하게 되므로 결과적으로 마그네트론이 과열되어 전자레인지가 손상되거나 화재가 발생할 수 있는 위험성이 있었다. However, the inverter microwave oven is driven by the high power of the magnetron is a result that the magnetron is overheated, resulting in a risk of damage to the microwave oven or fire.

본 발명은 전술한 문제점을 해결하기 위해 창안된 것으로서, 마그네트론의 온도에 따라 마그네트론의 출력을 가변하여 마그네트론의 과열을 미연에 방지할 수 있도록 한 인버터 전자레인지 과열방지방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an inverter microwave overheating prevention method that prevents overheating of a magnetron by varying the output of the magnetron according to the temperature of the magnetron.

전술한 목적을 달성하기 위해 창안된 본 발명의 구성은 다음과 같다. 본 발명의 인버터 전자레인지 과열방지방법은 PWM 제어신호에 따라 고압트랜스의 일차측 전압을 제어하여 인가되는 상기 고압트랜스의 이차측 유기전압을 통해 마그네트론의 고주파 출력을 제어할 수 있도록 한 인버터 전자레인지 구동방법에 있어서, 상기 마그네트론의 온도를 감지하여 상기 마그네트론의 온도가 기 설정된 설정온도 이상이 되면, 상기 마그네트론으로부터 출력되는 고주파 출력량을 감소시키는 것을 특징으로 한다.The present invention devised to achieve the above object is as follows. Inverter microwave overheating prevention method of the present invention drives the inverter microwave oven to control the high-frequency output of the magnetron through the secondary side induced voltage of the high voltage transformer is applied by controlling the primary side voltage of the high voltage transformer according to the PWM control signal The method may include detecting the temperature of the magnetron and reducing the amount of high-frequency output from the magnetron when the temperature of the magnetron is greater than or equal to a preset set temperature.

상기 고주파 출력량은 기 설정된 설정온도범위에 따라 다르게 설정되고, 상기 마그네트론의 온도가 증가할수록 증가하는 것을 특징으로 한다.The high frequency output amount is set differently according to a preset set temperature range, and is increased as the temperature of the magnetron increases.

이하에서는 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 설명한다. Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

도 1 은 본 발명에 따른 인버터 전자레인지의 블럭 구성도이다. 1 is a block diagram of an inverter microwave oven according to the present invention.

본 발명의 실시예에 따른 인버터 전자레인지의 과열방지장치는 도 1 에 도시된 바와 같이, 입력되는 교류전원(AC)의 소정 주파수 대역만을 통과시키는 필터부(10)와, 브릿지 다이오드(BD), 인덕터(L), 콘덴서(C1,C2)로 구성되어 교류전원을 정류하는 정류부(20), 고압트랜스(Trans)(30), 다이오드(D1,D2), 콘덴서(C3)로 구성되어 고압트랜스(Trans)(30)의 이차측 유기전압에 따라 마그네트론(M)을 구동시키는 마그네트론 발진부(40), 마이컴(70)의 제어신호에 따라 PWM 제어신호를 출력하는 출력제어부(60), 상기한 출력제어부(60)로부터 출력되는 PWM 제어신호에 따라 온/오프되어 고압트랜스(Trans)의 일차측 전압을 제어하는 스위칭부(50), 상기한 마그네트론(M)에 설치되어 마그네트론의 온도를 감지한 후 이를 마이컴(70)으로 출력하는 온도감지부(80), 및 상기한 출력제어부(60)에 제어신호를 인가하여 고압트랜스(Trans)의 이차측 유기전압에 따라 마그네트론(M)이 소정의 고주파를 출력하도록 하는 마이컴(70)을 포함하여 이루어진다. The overheat prevention apparatus of the inverter microwave oven according to the embodiment of the present invention, as shown in Figure 1, the filter unit 10, the bridge diode (BD), passing only a predetermined frequency band of the AC power input AC, It consists of an inductor (L), capacitors (C1, C2) to rectify the AC power source 20, a high-voltage transformer (Trans) 30, a diode (D1, D2), the capacitor (C3) consists of a high-voltage transformer ( The magnetron oscillator 40 for driving the magnetron M according to the secondary induced voltage of the Trans 30, the output controller 60 for outputting the PWM control signal according to the control signal of the microcomputer 70, the output controller Switching unit 50, which is on / off according to the PWM control signal output from the 60 to control the primary side voltage of the high-voltage transformer (Trans), is installed in the magnetron (M) and senses the temperature of the magnetron and then To the temperature sensing unit 80 and the output control unit 60 outputted to the microcomputer 70. It includes a microcomputer 70 to apply a control signal to the magnetron (M) to output a predetermined high frequency in accordance with the secondary induced voltage of the high-voltage transformer (Trans).

여기서, 상기한 마이컴(70)의 동작과정은 도 2 와 부합하여 상세하게 설명한다. Here, the operation process of the microcomputer 70 will be described in detail in accordance with FIG.

도 2 는 본 발명에 따른 인버터 전자레인지 과열방지방법의 순서도이다. 2 is a flow chart of the inverter microwave overheat prevention method according to the present invention.

본 발명의 실시예에 따른 인버터 전자레인지 과열방지방법은 마그네트론의 온도에 따라서 고주파 출력을 제어하도록 하는 것으로서, 조리가 시작(S10)되면, 입력된 교류전원으로 마그네트론에 고전압을 인가(S20)하도록 한다. Inverter microwave overheating prevention method according to an embodiment of the present invention is to control the high-frequency output according to the temperature of the magnetron, when cooking is started (S10), to apply a high voltage to the magnetron with the input AC power (S20). .

이와 더불어, 마그네트론(M)에 설치된 온도감지부(80)가 마그네트론의 온도를 감지하는데, 이 온도감지부(80)에 의해 감지된 마그네트론의 온도를 입력받는다. In addition, the temperature sensing unit 80 installed in the magnetron M detects the temperature of the magnetron, and receives the temperature of the magnetron sensed by the temperature sensing unit 80.

이에 따라, 마이컴(70)은 온도감지부(80)로부터 입력되는 마그네트론(M)의 온도에 따라 출력제어부(60)를 제어하여 마그네트론(M)으로부터 출력되는 고주파 출력량을 제어하는데, 이는 마그네트론(M)이 제어되는 설정온도와 다수개의 설정온도범위가 기 설정되고, 해당 설정온도범위에는 이 설정온도범위에 각각 감소될 고주파 출력량이 설정된다. 따라서, 마그네트론(M)의 온도에 따라 출력제어부(60)을 제어하여 상기한 고주파 출력량만큼 감소하도록 상기한 스위칭부(50)에 PWM 제어신호를 출력하도록 함으로써 마그네트론(M)으로부터 출력되는 고주파를 제어하게 된다. Accordingly, the microcomputer 70 controls the output controller 60 according to the temperature of the magnetron M input from the temperature sensing unit 80 to control the high frequency output amount output from the magnetron M, which is a magnetron M. ), The set temperature and the plurality of set temperature ranges to be controlled are preset, and the high frequency output amount to be reduced in each set temperature range is set in the set temperature range. Therefore, the high frequency output from the magnetron M is controlled by controlling the output controller 60 according to the temperature of the magnetron M to output the PWM control signal to the switching unit 50 so as to decrease by the high frequency output amount. Done.

즉, 온도감지부(80)로부터 마그네트론(M)의 온도가 입력되면, 입력된 마그네트론(M)의 온도가 설정온도범위에 포함되는 지를 판단(S40)하여 설정온도범위내에 포함되면, 마그네트론(M)이 이 설정온도범위에 설정된 고주파 출력량 만큼 감소하도록 출력제어부를 제어(S50)하여 마그네트론(M)에 인가되는 고전압을 감소시키고 이에 따라 마그네트론의 온도를 감소시키게 된다. That is, when the temperature of the magnetron (M) is input from the temperature sensing unit 80, it is determined whether the temperature of the input magnetron (M) is included in the set temperature range (S40), if included in the set temperature range, the magnetron (M) ) To reduce the high voltage applied to the magnetron M by controlling the output control unit S50 so as to decrease by the high frequency output amount set in the set temperature range, thereby reducing the temperature of the magnetron.

따라서, 온도감지부(80)로부터 입력되는 마그네트론(M)의 온도가 증가할수록 각 설정된 설정온도범위에 포함되므로, 입력되는 마그네트론(M)의 온도를 포함하는 설정온도범위에 따라 적절하게 고주파 출력량이 감소하게 된다. Therefore, since the temperature of the magnetron M input from the temperature sensing unit 80 increases, it is included in each set temperature range. Therefore, the high frequency output amount is appropriately set according to the set temperature range including the temperature of the magnetron M input. Will decrease.

전술한 바와 같이, 본 발명의 실시예에 따른 인버터 전자레인지 과열방지방법은 설정온도범위 각각에 감소될 고주파 출력량이 설정되어 있으므로, 마그네트론(M)의 온도 증가시 마그네트론(M)의 온도를 포함하는 설정온도범위의 고주파 출력량만큼 감소시켜 마그네트론이 과열되지 않고 연속적으로 동작할 수 있도록 한다.As described above, in the inverter microwave overheat prevention method according to the embodiment of the present invention, since the high frequency output amount to be reduced is set in each of the set temperature range, the temperature of the magnetron M is increased when the temperature of the magnetron M is increased. By reducing the high frequency output of the set temperature range, the magnetron can operate continuously without overheating.

본 발명은 전술한 실시예에 국한되지 않고 본 발명의 기술사상이 허용하는 범위 내에서 다양하게 변형하여 실시할 수 있다. The present invention is not limited to the above-described embodiments and can be carried out in various modifications within the scope of the technical idea of the present invention.

이와 같이 구성되는 본 발명에 따르면, 마그네트론의 온도에 따라 마그네트론의 출력을 가변하여 마그네트론의 과열을 미연에 방지할 수 있고, 이를 통해 마그네트론이 과열되지 않고 계속적으로 동작할 수 있게 된다. According to the present invention configured as described above, it is possible to prevent the overheating of the magnetron by varying the output of the magnetron according to the temperature of the magnetron, thereby allowing the magnetron to continue to operate without overheating.

Claims (3)

PWM 제어신호에 따라 고압트랜스의 일차측 전압을 제어하여 인가되는 상기 고압트랜스의 이차측 유기전압을 통해 마그네트론의 고주파 출력을 제어할 수 있도록 한 인버터 전자레인지 구동방법에 있어서, In the inverter microwave driving method for controlling the high frequency output of the magnetron through the secondary induced voltage of the high voltage transformer is applied by controlling the primary voltage of the high voltage transformer according to the PWM control signal, 상기 마그네트론의 온도를 감지하여 상기 마그네트론의 온도가 기 설정된 설정온도 이상이 되면, 상기 마그네트론으로부터 출력되는 고주파 출력량을 감소시키는 것을 포함하는 것을 특징으로 하는 인버터 전자레인지 과열방지방법.And sensing the temperature of the magnetron to reduce the amount of high-frequency output from the magnetron when the temperature of the magnetron is higher than or equal to a preset set temperature. 제 1 항에 있어서, 상기 고주파 출력량은 기 설정된 설정온도범위에 따라 다르게 설정되는 것을 포함하는 것을 특징으로 하는 인버터 전자레인지 과열방지방법.The method of claim 1, wherein the high frequency output amount is differently set according to a preset set temperature range. 제 1 항에 있어서, 상기 고주파 출력량은 상기 마그네트론의 온도가 증가할수록 증가하는 것을 포함하는 것을 특징으로 하는 인버터 전자레인지 과열방지방법.The method of claim 1, wherein the high frequency output amount increases as the temperature of the magnetron increases.
KR1020060048705A 2006-05-30 2006-05-30 Method preventing for over heating of inverter microwave oven KR20070114983A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101864065B1 (en) * 2017-01-09 2018-06-29 엘지전자 주식회사 Microwave oven and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101864065B1 (en) * 2017-01-09 2018-06-29 엘지전자 주식회사 Microwave oven and control method thereof

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