KR100751794B1 - Circuit for driving convection microwave oven - Google Patents

Circuit for driving convection microwave oven Download PDF

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KR100751794B1
KR100751794B1 KR1020060060747A KR20060060747A KR100751794B1 KR 100751794 B1 KR100751794 B1 KR 100751794B1 KR 1020060060747 A KR1020060060747 A KR 1020060060747A KR 20060060747 A KR20060060747 A KR 20060060747A KR 100751794 B1 KR100751794 B1 KR 100751794B1
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South Korea
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convection
fan
relay
heater
voltage transformer
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KR1020060060747A
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Korean (ko)
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김원석
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주식회사 대우일렉트로닉스
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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
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron
    • 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
    • H05B6/664—Aspects related to the power supply of the microwave heating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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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 circuit for driving a convection microwave oven is provided to enhance the safety level of the convection microwave oven by sequentially driving a convection heater relay and a microwave relay with a predetermined delay time. A circuit for driving a convection microwave oven includes a fan relay(32), a convection fan relay(36), a convection heater relay(33), and a microwave relay(38). The fan relay is connected to a fan and a high voltage transformer and controls a current, which is applied on the fan and the high voltage transformer. One end of the convection fan relay is connected to a convection fan, a convection heater, a convection heater, and the fan. The convection fan relay controls the current applied on the convection fan, the convection heater, and the heater. The convection heater relay is connected to the high voltage transformer. One end of the convection heater relay is connected to a PTC(Positive Temperature Coefficient) and the convection fan relay. The convection heater relay controls the current applied on the convection heater, the fan, and the PTC. The microwave relay is parallel-coupled with the convection heater relay and controls the current, which is applied on the high voltage transformer.

Description

컨벡션 전자레인지 구동회로{Circuit for driving convection microwave oven}Convection microwave driving circuit {Circuit for driving convection microwave oven}

도 1 은 종래의 컨벡션 전자레인지의 구동회로도.1 is a driving circuit diagram of a conventional convection microwave oven.

도 2 는 본 발명에 따른 컨벡션 전자레인지의 구동회로도.2 is a drive circuit diagram of a convection microwave oven according to the present invention;

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

31: 팬 32: 팬 릴레이31: Fan 32: Fan Relay

33: 컨벡션 히터 34: 컨벡션 히터 릴레이33: convection heater 34: convection heater relay

35: 컨벡션 팬 36: 컨벡션 팬 릴레이35: convection fan 36: convection fan relay

37: PTC 38: MW 릴레이37: PTC 38: MW Relay

39: 고압트랜스포머39: high voltage transformer

본 발명은 컨벡션 전자레인지에 관한 것으로서, 더욱 상세하게는 컨벡션 전 자레인지의 구동시키는 컨벡션 전자레인지의 구동회로에 관한 것이다.The present invention relates to a convection microwave oven, and more particularly, to a driving circuit of a convection microwave oven for driving a convection microwave oven.

일반적으로 전자레인지는 마그네트론으로부터 발생한 고주파를 음식물에 조사하여 음식물 중에 함유된 물분자의 병진 운동에 따른 마찰열을 발생시킴으로써 유전 가열에 의해 음식물을 조리하는 것이다. In general, a microwave oven cooks food by dielectric heating by irradiating high frequency generated from the magnetron to food to generate frictional heat according to the translational motion of water molecules contained in the food.

이러한 전자레인지는 높은 열효율에 의해 음식물의 조리시간을 대폭 단축하고, 음식물의 조리나 해동 및 데우기 과정에서 영양가의 손실을 줄일 수 있는 관계로 근래 널리 사용되고 있다. These microwave ovens have been widely used in recent years due to the high thermal efficiency can significantly reduce the cooking time of food, and to reduce the loss of nutritional value during the cooking, thawing and warming of food.

특히, 최근에 개발된 컨벡션 전자레인지는 통상적인 전자레인지와 같이 고주파에 의한 음식물의 조리 기능과 함께 히터를 구비하여 이 히터를 발열시킴으로써 내부의 음식물을 직접 가열한다. In particular, recently developed convection microwave ovens have a heater with a high frequency of cooking of foods like a conventional microwave oven to heat the food directly by heating the heater.

도 1 은 종래의 컨벡션 전자레인지의 구동회로도이다. 1 is a driving circuit diagram of a conventional convection microwave oven.

종래의 컨벡션 전자레인지는 조리실(미도시) 내부에 열을 방출하는 컨벡션 히터(11), 컨벡션 히터에 의해 발생된 열을 대류시키는 컨벡션 팬(13), 조리실 내부에 발생된 열을 외부로 방출하는 팬(15)이 병렬로 배치되고 이들 컨벡션 히터(11), 컨벡션 팬(13), 팬(15) 각각에는 컨벡션 히터 릴레이(12), 컨벡션 팬 릴레이(14), 및 팬 릴레이(16)가 연결되어 마이컴(미도시)의 제어신호에 따라 이들을 온/오프됨으로써 상기한 컨벡션 히터(11), 컨벡션 팬(13), 팬(15)로 인가되는 전류를 제어한다. Conventional convection microwave oven is a convection heater (11) for dissipating heat inside the cooking chamber (not shown), a convection fan (13) for convection heat generated by the convection heater, to emit heat generated inside the cooking chamber to the outside Fans 15 are arranged in parallel and convection heater relays 12, convection fan relays 14, and fan relays 16 are connected to each of these convection heaters 11, convection fans 13, and fans 15. In order to control the current applied to the convection heater 11, the convection fan 13, and the fan 15 by turning them on and off according to a control signal of a microcomputer (not shown).

또한, 고압트랜스포머(High Voltage Transformer;HVT)(20)는 병렬로 배치되는 슬로우 액트 릴레이(Sloe Act Relay)(18)와 MW(Microwave) 릴레이(19)와 연결된 다. 또한, 슬로우 액트 릴레이(18)의 일단에는 고압트랜스포머(20)로 인가되는 전류를 감소시켜 고압트랜스포머(20)로 인가하는 PTC(정특성 써미스터)가 설치된다. In addition, the High Voltage Transformer (HVT) 20 is connected to a Slow Act Relay 18 and a MW Relay 19 arranged in parallel. One end of the slow acting relay 18 is provided with a PTC (positive characteristic thermistor) which reduces the current applied to the high voltage transformer 20 and applies the voltage to the high voltage transformer 20.

이러한 종래의 컨벡션 전자레인지는 컨벡션 히터(11)와, 컨벡션 팬(13), 및 팬(15)이 동작하는 경우에는 이들 각각에 연결된 컨벡션 히터 릴레이(12)와, 컨벡션 팬 릴레이(14), 및 팬 릴레이(16)가 마이컴의 제어신호에 따라 턴온되어 컨벡션 히터(11)와, 컨벡션 팬(13), 및 팬(15)에 전류가 인가된다. Such a conventional convection microwave oven includes a convection heater 11, a convection fan 13, and a convection heater relay 12, a convection fan relay 14 connected to each of the fans 15 when the fan 15 operates. The fan relay 16 is turned on according to the control signal of the microcomputer to apply current to the convection heater 11, the convection fan 13, and the fan 15.

한편, 마그네트론(미도시)과 팬(15)이 동작하는 경우에는 전원이 인가되면 마이컴의 제어신호에 따라 팬 릴레이(16)와 슬로우 액트 릴레이(18)가 턴온되어 팬(15)으로 전류가 유도됨과 더불어 슬로우 액트 릴레이(18)를 통해 고압트랜스포머(20)으로 전류가 유도된다. Meanwhile, when the magnetron (not shown) and the fan 15 operate, when the power is applied, the fan relay 16 and the slow act relay 18 are turned on according to the control signal of the microcomputer to induce current to the fan 15. In addition, current is induced to the high voltage transformer 20 through the slow act relay 18.

슬로우 액트 릴레이(18)를 통해 유도되는 전류는 PTC(17)를 통해 전류가 감소되어 고압트랜스포머(20)로 인가되고 소정 시간 바람직하게는 100㎳가 경과한 후, MW 릴레이(19)가 턴온됨으로써 고압트랜스포머(20)에 MW 릴레이(19)를 통해 전류가 인가된다. 이를 통해, 고압트랜스포머(39)로 돌입전류가 인가되는 것을 차단한다. The current induced through the slow act relay 18 is reduced through the PTC 17 to be applied to the high voltage transformer 20 and after a predetermined time, preferably 100 mA, the MW relay 19 is turned on. A current is applied to the high voltage transformer 20 through the MW relay 19. Through this, the inrush current is blocked from being applied to the high voltage transformer 39.

하지만, 상기한 전자레인지 구동회로에서 채용된 슬로우 액트 릴레이(18)는 상기한 바와 같이 돌입전류를 감소시키기 위한 것으로서, 슬로우 액트 릴레이(18)를 통해 돌입전류를 감소시킬 수는 있으나, 이 슬로우 액트 릴레이(18)의 가격이 높아 전자레인지의 가격 경쟁력이 떨어지게 되는 한 요인이 되었다. However, the slow act relay 18 employed in the above microwave driving circuit is to reduce the inrush current as described above, but the slow act relay 18 may reduce the inrush current through the slow act relay. The high price of the relay 18 has become a factor in the price competitiveness of the microwave oven.

따라서, 슬로우 액트 릴레이를 채용하지 않고도 돌입전류를 감소시키고 이와 더불어 생산 비용을 감소시킬 필요성이 있었다.Thus, there was a need to reduce inrush current and at the same time reduce production costs without employing slow acting relays.

본 발명은 전술한 문제점을 해결하기 위해 창안된 것으로서, 컨벡션 히터 릴레이를 통해 PTC와 직렬로 연결하여 이 컨벡션 히터 릴레이와 MW 릴레이를 지연 시간을 두고 순차적으로 구동하도록 한 컨벡션 전자레인지 구동회로를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a convection microwave drive circuit for driving the convection heater relay and the MW relay sequentially with a delay time by connecting them in series with PTC through a convection heater relay. The purpose is.

전술한 목적을 달성하기 위해 창안된 본 발명의 구성은 다음과 같다. 본 발명의 컨벡션 전자레인지의 구동회로는 조리실 내부에 열을 방출하는 컨벡션 히터, 상기 컨벡션 히터에 의해 발생된 열을 대류시키는 컨벡션 팬, 상기 조리실 내부에 발생된 열을 외부로 방출하는 팬, 및 상기 조리실 내부에 고주파를 조사하는 고압트랜스포머로 인가되는 전류를 마이컴의 제어신호에 따라 제어하여 콤비 조리를 수행하도록 하는 컨벡션 전자레인의 구동회로에 있어서, 상기 팬과 고압트랜스포머에 연결되어 상기 팬과 고압트랜스포머로 인가되는 전류를 제어하는 팬 릴레이, 일단이 상기 컨벡션 팬과 컨벡션 히터, 및 팬에 연결되어 상기 컨벡션 팬과 컨벡션 히터, 및 히터로 인가되는 전류를 제어하는 컨벡션 팬 릴레이, 상기 고압트랜스포머에 연결되어 상기 고압트랜스포머로 인가되는 전류를 감소시키는 PTC와 상기 컨벡션 팬 릴레이에 일단이 연결되어 상기 컨벡션 히터와, 팬, 및 PTC로 인가되는 전류 를 제어하는 컨벡션 히터 릴레이, 및 상기 컨벡션 히터 릴레이와 병렬로 배치되어 상기 고압트랜스포머로 인가되는 전류를 제어하는 MW 릴레이를 포함하는 것을 특징으로 한다.The present invention devised to achieve the above object is as follows. The driving circuit of the convection microwave oven of the present invention includes a convection heater for dissipating heat inside the cooking chamber, a convection fan for convection of heat generated by the convection heater, a fan for dissipating heat generated in the cooking chamber to the outside, and the In the drive circuit of the convection electronic lane to perform a combination cooking by controlling the current applied to the high-voltage transformer for irradiating the high frequency inside the cooking chamber according to the control signal of the microcomputer, the fan and the high-voltage transformer is connected to the fan and the high-voltage transformer A fan relay for controlling a current applied to the convection fan and a convection heater, and a fan connected to the convection fan and a convection heater, and a convection fan relay for controlling a current applied to the heater, and connected to the high voltage transformer. PTC and the convection fan reel to reduce the current applied to the high voltage transformer A convection heater relay connected at one end to the convection heater, a fan, and a PTC, and a MW relay disposed in parallel with the convection heater relay to control a current applied to the high voltage transformer. Characterized in that.

상기 고압트랜스포머 구동시 상기 팬 릴레이와 컨벡션 히터 릴레이, 및 MW 릴레이는 기 설정된 지연시간을 두고 순차적으로 동작하는 것을 특징으로 한다.When the high voltage transformer is driven, the fan relay, the convection heater relay, and the MW relay operate sequentially with a predetermined delay time.

상기 지연시간은 100㎳인 것을 특징으로 한다.The delay time is characterized in that 100ms.

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 2 는 본 발명에 따른 컨벡션 전자레인지의 구동회로도이다. 2 is a driving circuit diagram of a convection microwave oven according to the present invention.

본 발명의 실시예에 따른 전자레인지 구동회로는 팬(31)의 구동을 제어하는 팬 릴레이(32)가 팬(31)과 직렬로 연결되고 고압트랜스포머(39)의 후단에 설치되어 턴온시 상기한 팬(31)으로 전류를 인가함과 더불어 고압트랜스포머(39)로 전류가 인가되도록 한다. In the microwave driving circuit according to the embodiment of the present invention, the fan relay 32 controlling the driving of the fan 31 is connected in series with the fan 31 and installed at the rear end of the high voltage transformer 39 to turn on the above. In addition to applying a current to the fan 31, a current is applied to the high-voltage transformer 39.

또한, 컨벡션 히터(33)의 구동을 제어하는 컨벡션 히터 릴레이(34)는 PTC(37)의 일단에 설치됨과 더불어 컨벡션 히터(33)와 직렬로 연결되어 턴온시 PTC(37)와 컨벡션 히터(33)로 전류를 공급한다. In addition, the convection heater relay 34 which controls the driving of the convection heater 33 is installed at one end of the PTC 37 and connected in series with the convection heater 33 to turn on the PTC 37 and the convection heater 33. Supply current.

아울러, 팬(31)은 일단이 컨벡션 히터(33)와 연결된다.In addition, one end of the fan 31 is connected to the convection heater 33.

컨벡션 팬 릴레이(36)는 컨벡션 팬 릴레이(35)와 팬(31)의 구동을 제어하는 것으로서, 상기한 컨벡션 히터(33)와 컨벡션 히터 릴레이(34), 및 팬(31)에 직렬로 연결되고, 컨벡션 팬(35)과 직렬로 연결되어 턴온시 컨벡션 팬(35)과 팬(31), 및 컨벡션 히터(33)로 전류를 공급한다. The convection fan relay 36 controls the driving of the convection fan relay 35 and the fan 31, and is connected in series to the convection heater 33, the convection heater relay 34, and the fan 31. The convection fan 35 is connected in series to supply current to the convection fan 35, the fan 31, and the convection heater 33 at turn-on.

또한, MW 릴레이(38)는 상기한 컨벡션 히터 릴레이(34)와 병렬로 배치되어 고압트랜스포머(39)로 전류를 공급한다. In addition, the MW relay 38 is disposed in parallel with the convection heater relay 34 to supply a current to the high-voltage transformer (39).

따라서, 고압트랜스포머(39)는 일단이 팬 릴레이(32)와 연결되고 병렬로 배치된 컨벡션 히터 릴레이(34)와 MW 릴레이(38)에 타단이 연결된다. Accordingly, the high voltage transformer 39 has one end connected to the fan relay 32 and the other end connected to the convection heater relay 34 and the MW relay 38 arranged in parallel.

이하 상기한 컨벡션 전자레인지의 구동회로에 따른 컨벡션 전자레인지의 콤비 조리시 구동과정을 각각의 경우에 따라 상세하게 설명한다. Hereinafter, the driving process during the combination cooking of the convection microwave oven according to the driving circuit of the convection microwave oven will be described in detail in each case.

먼저, 마그네트론(미도시)과 팬(31)이 동작하는 경우, 마이컴(미도시)은 상기한 팬 릴레이(32)를 턴온시켜 팬(31)을 구동시키고, 이와 함께 팬 릴레이(32)가 턴온됨으로써 고압트랜스포머(39)의 일단이 접지와 연결된다. First, when the magnetron (not shown) and the fan 31 operate, the microcomputer (not shown) turns on the fan relay 32 to drive the fan 31, and together with the fan relay 32, the fan relay 32 turns on. As a result, one end of the high voltage transformer 39 is connected to the ground.

팬 릴레이(32) 턴온 후, 기 설정된 지연시간 바람직하게는 100㎳가 경과하면, 컨벡션 히터 릴레이(34)를 턴온시켜 PTC(37)로 전류가 공급되도록 하고, 역시 지연시간이 경과하면 MW 릴레이(38)를 턴온시켜 고압트랜스포머(39)로 전류가 공급되어 마그네트론이 동작하게 된다. After the turn-on of the fan relay 32, when the predetermined delay time, preferably 100 ms has elapsed, the convection heater relay 34 is turned on so that the current is supplied to the PTC 37, and when the delay time has elapsed, the MW relay ( 38) is turned on to supply a current to the high voltage transformer 39 to operate the magnetron.

이 때, 컨벡션 히터 릴레이(34)가 턴온되더라도 컨벡션 팬 릴레이(36)가 턴온되지 않으므로 컨벡션 히터(33)는 동작하지 않는다. At this time, even if the convection heater relay 34 is turned on, the convection fan relay 36 is not turned on, so the convection heater 33 does not operate.

다음으로, 컨벡션 히터(33)와 컨벡션 팬(35), 및 팬(31)이 동작하는 경우에는 컨벡션 히터 릴레이(33)와 컨벡션 팬 릴레이(36)를 턴온시킨다. 이와 같이, 컨벡션 히터 릴레이(33)와 컨벡션 팬 릴레이(36)가 턴온되면 컨벡션 히터 릴레이(33) 와 컨벡션 팬 릴레이(36)를 통해 컨벡션 히터(33)와 팬(31)으로 전류가 공급되므로 컨벡션 히터(33)와 팬(31)이 구동하게 되고, 이와 함께 컨벡션 팬(35)으로 전류가 공급되어 컨벡션 팬(35)이 구동하게 된다. Next, when the convection heater 33, the convection fan 35, and the fan 31 operate, the convection heater relay 33 and the convection fan relay 36 are turned on. As such, when the convection heater relay 33 and the convection fan relay 36 are turned on, the current is supplied to the convection heater 33 and the fan 31 through the convection heater relay 33 and the convection fan relay 36. The heater 33 and the fan 31 are driven, and together with this, a current is supplied to the convection fan 35 to drive the convection fan 35.

따라서, 컨벡션 팬(35)과 컨벡션 히터(33)가 구동하게 되면, 팬(31)도 함게 구동하게 된다. 아울러, 컨벡션 팬(35)과 컨벡션 히터(33)는 컨벡션 히터 릴레이(34)와 컨벡션 팬 릴레이(36)가 서로 직렬로 연결되므로 컨벡션 팬 릴레이(35)가 턴온되지 않으면 구동하지 않는다. 따라서 컨벡션 전자레인지의 안전조건에 만족하게 된다.Therefore, when the convection fan 35 and the convection heater 33 are driven, the fan 31 is also driven together. In addition, the convection fan 35 and the convection heater 33 are not driven unless the convection fan relay 35 is turned on because the convection heater relay 34 and the convection fan relay 36 are connected in series. Therefore, the safety conditions of the convection microwave oven are satisfied.

마지막으로, 팬(31)만 동작하는 경우에는 팬 릴레이(32)를 턴온시킨다. 이와 같이, 팬 릴레이(32)를 턴온시키면 팬(31)으로 전류가 공급되므로 팬(31)이 구동하게 된다. 한편, 팬 릴레이(32)가 턴온되어 고압트랜스포머(39)의 일단이 접지와 연결되나, 컨벡션 히터 릴레이(34)와 MW 릴레이(38)가 턴오프 상태이므로 고압트랜스포머(39)로 전류가 공급되지 않아 고압트랜스포터(39)는 동작하지 않는다. Finally, when only the fan 31 is operated, the fan relay 32 is turned on. As such, when the fan relay 32 is turned on, the current is supplied to the fan 31 so that the fan 31 is driven. On the other hand, the fan relay 32 is turned on so that one end of the high voltage transformer 39 is connected to the ground, but since the convection heater relay 34 and the MW relay 38 are turned off, current is not supplied to the high voltage transformer 39. Therefore, the high pressure transporter 39 does not operate.

이러한 구성에 따라 팬 릴레이(32)가 턴온되지 않으면 고압트랜스포머(39)가 동작하지 않게 되므로 고압트랜스포머(39) 동작시 팬(31)이 반드시 동작하도록 하는 안전조건에 충분히 만족한다. According to this configuration, if the fan relay 32 is not turned on, the high voltage transformer 39 does not operate, and thus satisfies the safety condition that the fan 31 necessarily operates during the operation of the high voltage transformer 39.

즉, 본 발명의 실시예에 따른 컨벡션 전자레인지 구동회로는 슬로우 액트 릴레이를 채용하지 않고 각종 릴레이를 통해 컨벡션 전자레인지가 구동할 수 있도록 함으로써, 컨벡션 전자레인지의 생산비용을 절감할 수 있다.That is, the convection microwave oven driving circuit according to the embodiment of the present invention can reduce the production cost of the convection microwave oven by allowing the convection microwave oven to be driven through various relays without employing a slow acting relay.

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, 컨벡션 히터 릴레이를 통해 PTC와 직렬로 연결하여 이 컨벡션 히터 릴레이와 MW 릴레이를 지연 시간을 두고 순차적으로 구동하도록 하여 저 비용으로 안전조건을 충분히 만족하는 컨벡션 전자레인지를 생산할 수 있다. According to the present invention configured as described above, a convection microwave oven that satisfactorily meets safety conditions at low cost by being connected in series with PTC through a convection heater relay to sequentially drive the convection heater relay and the MW relay with a delay time. Can produce.

Claims (3)

조리실 내부에 열을 방출하는 컨벡션 히터, 상기 컨벡션 히터에 의해 발생된 열을 대류시키는 컨벡션 팬, 상기 조리실 내부에 발생된 열을 외부로 방출하는 팬, 및 상기 조리실 내부에 고주파를 조사하는 고압트랜스포머로 인가되는 전류를 마이컴의 제어신호에 따라 제어하여 콤비 조리를 수행하도록 하는 컨벡션 전자레인의 구동회로에 있어서, Convection heater for dissipating heat inside the cooking chamber, a convection fan for convection heat generated by the convection heater, a fan for dissipating heat generated inside the cooking chamber to the outside, and a high pressure transformer for irradiating high frequency inside the cooking chamber In the driving circuit of the convection electronic lane to perform a combination cooking by controlling the applied current according to the control signal of the microcomputer, 상기 팬과 고압트랜스포머에 연결되어 상기 팬과 고압트랜스포머로 인가되는 전류를 제어하는 팬 릴레이;A fan relay connected to the fan and the high voltage transformer to control a current applied to the fan and the high voltage transformer; 일단이 상기 컨벡션 팬과 컨벡션 히터, 및 팬에 연결되어 상기 컨벡션 팬과 컨벡션 히터, 및 히터로 인가되는 전류를 제어하는 컨벡션 팬 릴레이;A convection fan relay having one end connected to the convection fan and the convection heater and a fan to control the convection fan and the convection heater and a current applied to the heater; 상기 고압트랜스포머에 연결되어 상기 고압트랜스포머로 인가되는 전류를 감소시키는 PTC와 상기 컨벡션 팬 릴레이에 일단이 연결되어 상기 컨벡션 히터와, 팬, 및 PTC로 인가되는 전류를 제어하는 컨벡션 히터 릴레이; 및A convection heater relay connected to the high voltage transformer to reduce the current applied to the high voltage transformer and the convection fan relay connected at one end to control the convection heater, the fan, and the current applied to the PTC; And 상기 컨벡션 히터 릴레이와 병렬로 배치되어 상기 고압트랜스포머로 인가되는 전류를 제어하는 MW 릴레이를 포함하는 것을 특징으로 하는 컨벡션 전자레인지의 구동회로.And a MW relay disposed in parallel with the convection heater relay to control a current applied to the high voltage transformer. 제 1 항에 있어서, 상기 고압트랜스포머 구동시 상기 팬 릴레이와 컨벡션 히 터 릴레이, 및 MW 릴레이는 기 설정된 지연시간을 두고 순차적으로 동작하는 것을 특징으로 하는 컨벡션 전자레인지의 구동회로.The driving circuit of the convection microwave oven according to claim 1, wherein the fan relay, the convection heater relay, and the MW relay operate sequentially with a predetermined delay time when the high voltage transformer is driven. 제 2 항에 있어서, 상기 지연시간은 100㎳인 것을 특징으로 하는 컨벡션 전자레인지의 구동회로.3. The driving circuit of a convection microwave oven according to claim 2, wherein said delay time is 100 microseconds.
KR1020060060747A 2006-06-30 2006-06-30 Circuit for driving convection microwave oven KR100751794B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100229779B1 (en) 1997-08-29 1999-11-15 전주범 Control method of inrush electric current for microwave oven

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100229779B1 (en) 1997-08-29 1999-11-15 전주범 Control method of inrush electric current for microwave oven

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