KR970004677B1 - Door for a microwave oven - Google Patents

Door for a microwave oven Download PDF

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Publication number
KR970004677B1
KR970004677B1 KR1019940027471A KR19940027471A KR970004677B1 KR 970004677 B1 KR970004677 B1 KR 970004677B1 KR 1019940027471 A KR1019940027471 A KR 1019940027471A KR 19940027471 A KR19940027471 A KR 19940027471A KR 970004677 B1 KR970004677 B1 KR 970004677B1
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South Korea
Prior art keywords
door
switch
solenoid
microwave oven
hole
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KR1019940027471A
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Korean (ko)
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KR960014796A (en
Inventor
유학석
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대우전자 주식회사
배순훈
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Priority to KR1019940027471A priority Critical patent/KR970004677B1/en
Publication of KR960014796A publication Critical patent/KR960014796A/en
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Publication of KR970004677B1 publication Critical patent/KR970004677B1/en

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/66Circuits
    • H05B6/666Safety circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/6414Aspects relating to the door of the microwave heating apparatus
    • H05B6/6417Door interlocks of the microwave heating apparatus and related circuits

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

The door safety circuit of a microwave oven is arranged to prevent a door from being opened on the case where a cooked material is unexpectedly exploded. In the microwave where a pair of door hooks are formed, a locking protrusion(10) having a hole(10A) is protruded, and a solenoid(20) is installed on the inner side of a front plate(3) and forms a shaft(20A) which is inserted into the hole(10A), the door safety circuit installs a start relay(RY1) which controls each load driving power by means of a first switch(RY11) at a relay where a second switch(RY12) is formed to be engaged with the first switch(RY11). Thus, the output power of a low voltage transducer(L.V.T) from the second switch(RY12) of the start relay(RY1) is applied to the solenoid(20) via a direct current rectifier(21).

Description

전자렌지의 도어안전회로Microwave Door Safety Circuit

제1도는 본 발명에 의한 전자레인지의 도어안전장치를 보안 사시도.1 is a security perspective view of a door safety device of a microwave oven according to the present invention.

제2도 (a) 및 (b)는 본 발명에 의한 전자레인지의 도어안전장치의 작용 설명도.Figure 2 (a) and (b) is an explanatory view of the operation of the door safety device of the microwave oven according to the present invention.

제3도는 본 발명에 의한 전자레인지의 도어안전회로도.3 is a door safety circuit diagram of a microwave oven according to the present invention.

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

1 : 도어 2 : 도어후크1: door 2: door hook

3 : 캐비티 전면판 4 : 후크삽입공3: cavity front panel 4: hook insertion hole

10 : 잠금편 10a : 구멍10: locking piece 10a: hole

11 : 레버삽입공 20 : 솔레노이드11: lever insertion hole 20: solenoid

20a : 샤프트 21 : 직류정류부20a: shaft 21: DC rectifier

30 : 제어회로 RY1 : 시작릴레이30: control circuit RY1: start relay

RY11,RY12 : 시작릴레이스위치RY11, RY12: Start relay switch

본 발명의 전자렌지의 도어안전회로에 관한 것으로, 특히 전자렌지의 잘못사용에 의해 조리실 내에서 용기 폭발들이 발생될때 도어가 열리는 위험을 방지할 수 있도록 하는 안전 잠금장치를 제어할 수 있도록 한 전자렌지의 도어안전 회로에 관한 것이다.The present invention relates to a door safety circuit of a microwave oven, in particular a microwave oven capable of controlling a safety lock device that can prevent a door from being opened when a container explosion occurs in a cooking chamber due to a misuse of the microwave oven. Of the door safety circuit.

일반적으로, 전자렌지의 도어는 도어후크에 의해 도어가 잠기도록 되어 있고, 그 후크에 의해 연동되는 1차,2차 안전스위치 및 모니터스위치에 의해 도어의 열림시 전자렌지의 동작이 중지되도록 제어회로가 구성된다.In general, the door of the microwave oven is locked by the door hook, the control circuit to stop the operation of the microwave oven when the door is opened by the primary and secondary safety switch and the monitor switch interlocked by the hook. Is composed.

그런데, 전자렌지의 조리실내에 밀폐된 조리물(예 : 계란, 우유팩, 마개가 막힌 병류 및 한약팩등등)을 장시간 가열하는 경우에 터지는 경우가 생길수 있고, 조리실내에서 밀폐된 조리물이 터지게 되면, 그 폭발력에 의해 도어후크에 의해 잠겨있던 도어가 열리면서 조리물의 깨진 파편 및 트레이의 깨진 파편이 튀어나와 매우 위험한 문제점이 있었다.However, when the food (eg, eggs, milk packs, clogged bottles and herbal packs, etc.) sealed in the microwave's cooking chamber is heated for a long time, it may burst, and the sealed food in the cooking chamber may burst. When the door is locked by the door hook by the explosive force, broken fragments of the food and broken fragments of the tray pop out, which was very dangerous.

본 발명은 이와 같은 종래 문제점을 감안하여 도어를 닫으면 솔레노이드에 의해 완전하게 도어가 잠기도록 하되, 그 솔레노이드를 조리시작시에 구동시킬 수 있도록 한 전자렌지의 도어안전회로에 관한 것이다.The present invention relates to a door safety circuit of a microwave oven that allows the door to be completely locked by the solenoid when the door is closed in view of such a conventional problem, so that the solenoid can be driven at the start of cooking.

이와 같은 본 발명의 목적은 도어프레임에 잠금편을 설치하고 캐비티 전면판 내측에서 솔레노이드에 의해 잠금편의 구멍에 샤프트를 끼워서 도어가 안전하게 잠기도록 이루어진 전자렌지에 있어서, 시작릴레이의 제1스위치와 연동되는 제2스위치를 구비시켜 그 시작릴레이의 제2스위치에 의해 상기한 솔레노이드를 제어토록 결선하여 조리중에만 솔레노이드가 동작되도록 함으로써, 달성되는 것으로, 이와 같은 본 발명에 의하면, 조리시작시에 솔레노이드가 작동되어 도어를 후크 이외의 보안적으로 안전하게 잠그게 되고, 조리가 중단 내지 종료되면, 시작릴레이에 의해 솔레노이드가 오프되어 안전잠금을 해제하게 되므로, 조리실 내부에서 폭발등이 발생한다 하더라도 도어가 안전하게 닫혀 있어서 안전을 도모할 수 있게 된다.The object of the present invention is to install a locking piece in the door frame and to insert the shaft into the hole of the locking piece by the solenoid inside the cavity front plate, so that the door is securely locked, the first switch of the start relay It is achieved by providing a second switch and connecting the solenoid to be controlled by the second switch of the start relay so that the solenoid is operated only during cooking. According to the present invention, the solenoid is operated at the start of cooking. The door is securely and securely locked other than the hook, and when the cooking is stopped or terminated, the solenoid is turned off by the start relay to release the safety lock. Therefore, even if an explosion occurs inside the cooking chamber, the door is safely closed. Safety can be achieved.

이하, 본 발명에 의한 실시예를 첨부된 도면을 참조해서 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 도어안전회로는 제1도 및 제2도에 도시된 바와 같은 도어안전장치의 솔레노이드를 제어하기 위한 회로로서, 먼저, 도어안전장치는, 도어(1)의 프레임상에 상하로 도어후크(2)가 돌설되며, 캐비티 전면판(3)에 도어후크 삽입공(4)이 형성되고, 그 도어후크 삽입공(4) 내측에는 도어후크(2)가 삽입되어 걸리는 걸림부가 형성되고, 그 도어후크(2)에 의해 레버를 통하거나 직접 연동되는 1차, 2차 도어안전스위치, 모니터스위치 도어감지스위치등이 설치되어 구성된다.The door safety circuit of the present invention is a circuit for controlling the solenoid of the door safety device as shown in FIGS. 1 and 2, firstly, the door safety device is a door hook up and down on the frame of the door 1. (2) is protruded, the door hook insertion hole (4) is formed in the cavity front plate (3), inside the door hook insertion hole (4) inside the door hook (2) is inserted into the engaging portion is formed, The door hook 2 is provided with a primary and secondary door safety switch, a monitor switch, a door detection switch, and the like, which are directly or interlocked with a lever.

이와 같은 통상의 도어잠금장치에 있어서 본 발명자에 의해 제안된 도어안전장치는, 상기한 도어(1)의 상하 후크(2)사이에 선단에 구멍(10a)이 형성된 잠금편(10)을 돌출되게 설치하고, 그 잠금편(10)이 삽입될 수 있도록 캐비티 전면판(3)에 잠금편 삽입공(11)을 형성하며, 그 잠금편 삽입공(11) 내측에는 삽입된 잠금편(10)의 구멍(10a)에 샤프트(20a)를 끼워서 안전하게 잠글수 있는 솔레노이드(20)를 고정설치하여 구성된다.In such a conventional door locking device, the door safety device proposed by the present inventors protrudes the locking piece 10 having a hole 10a formed at the tip between the upper and lower hooks 2 of the door 1. And a locking piece insertion hole 11 in the cavity front plate 3 so that the locking piece 10 can be inserted therein, and inside the locking piece insertion hole 11 of the locking piece 10 inserted therein. It is configured by fixing the solenoid 20 which can be safely locked by inserting the shaft 20a into the hole 10a.

이와 같이 잠금편과 솔레노이드(20)를 설치한 경우에 도어(1)를 닫고 솔레노이드(20)를 작동시키면, 솔레노이드(20)의 샤프트(20a)가 잠금편(10)의 구멍(10a)에 끼워져 도어를 후크(2)의 잠금 이외에 보완적으로 잠그게 된다.When the locking piece and the solenoid 20 are installed in this way, when the door 1 is closed and the solenoid 20 is operated, the shaft 20a of the solenoid 20 is inserted into the hole 10a of the locking piece 10. The door is complementarily locked in addition to the locking of the hook (2).

그런데, 도어만 닫으면 솔레노이드(20)가 동작되어 이중으로 잠그게 된다면, 메인 전원이 가해진 경우에 항상 솔레노이드를 작동시켜야 한다는 문제점이 생기므로, 가장 효과적이면서도 안전 기능을 수행할 수 있도록 본 발명에 따른 제3도에 도시된 바와 같은 안전회로를 제공한다.By the way, if the solenoid 20 is locked only by closing the door, the solenoid 20 is operated so that the solenoid should always be operated when the main power is applied. A safety circuit as shown in FIG. 3 is provided.

제3도는 본 발명에 의한 전자렌지의 도어안전 회로도로서, 이에 도시된 바와 같이 마그네트론 서모스탯(온도스위치)(MTH)를 통한후 시작릴레이스위치(RY11) 및 1차, 2차 도어안전스위치(SW1)(SW2)를 통하여 각종 부하 즉, 턴테이블모터(GM) 캐비티램프(CL) 팬모터(FM) 및 출력조절 릴레이(RY2) 스위치를 통해서 고압트랜스(H.V.T)를 제어할 수 있도록 이루어지고, 저압트랜스(L.V.T)를 통해 일정한 저전압을 공급받는 제어회로(PCB)(30)에서 부하구동수단을 통해서 각 부하의 구동을 제어토록 구성된다. 시작릴레이(RY1)를 통해서 상기한 시작릴레이스위치(RY11)를 제어하고, 출력조절 릴레이(RY2)를 통해서 마그네트론의 출력을 조절할 수 있도록 이루어진다.3 is a door safety circuit diagram of a microwave oven according to the present invention, and as shown thereafter, through a magnetron thermostat (temperature switch) M TH , a start relay switch RY11 and a primary and secondary door safety switch ( It is made to control the high voltage transformer (HVT) through various loads through SW1) (SW2), that is, turntable motor (GM) cavity lamp (CL) fan motor (FM) and output control relay (RY2) switch. The control circuit (PCB) 30 that receives a constant low voltage through the transformer LVT is configured to control the driving of each load through the load driving means. The start relay switch RY11 is controlled through the start relay RY1, and the output of the magnetron is controlled through the output control relay RY2.

이와 같은 전자렌지 제어회로에 있어서, 상기한 저압트랜스(L.V.T)의 2차측 출력전원을 상기한 시작릴레이(RY1)의 제1스위치(RY11)와 연동되는 제2스위치(RY12)를 통한 전원이 직류 정류부(21)를 통하여 도어안전잠금을 제동하는 솔레노이드(20)를 구동시키도록 결선하여 구성된다. 여기서, 시작릴레이(RY1)는 2개의 스위치(RY11)(RY12)를 가진 4단자 릴레이를 사용한 것이다.In the microwave control circuit as described above, the second output power of the low voltage transformer LVT is supplied via the second switch RY12 which is linked with the first switch RY11 of the start relay RY1. It is configured to drive the solenoid 20 for braking the door safety lock through the rectifier 21. Here, the start relay RY1 uses a four-terminal relay having two switches RY11 and RY12.

먼저 전자렌지의 도어(1)를 당으면, 도어후크(2)에 의해 통상의 도어잠김 상태가 되고, 1차, 2차 도어안전스위치(SW1)(SW2)가 온되며, 이후 조리세팅을 하여 조리를 시작시키면, 시작릴레이(RY1)가 온되어 그의 제1, 제2스위치(RY11)(RY12)를 온시키게 되며, 이에따라 제1스위치(RY11)를 통해서는 각 부하에 전원이 공급되어 조리시작이 이루어지고, 동시에 제2스위치(RY12)를 통해서는 저압트랜스(L.V.T)의 전원이 직류 정류부(21)에 공급되고, 그 직류정류부(21)를 통하여 직류전원이 솔레노이드(20)에 인가되어 솔레노이드(20)가 온된다.First, when the door 1 of the microwave oven is pulled out, the door hook 2 is normally locked, and the first and second door safety switches SW1 and SW2 are turned on, and then the cooking setting is performed. When the cooking starts, the start relay RY1 is turned on to turn on the first and second switches RY11 and RY12. Accordingly, power is supplied to each load through the first switch RY11 to start cooking. At the same time, the power of the low voltage transformer LVT is supplied to the DC rectifying unit 21 through the second switch RY12, and the DC power is applied to the solenoid 20 through the DC rectifying unit 21. 20 is turned on.

이에 따라 솔레노이드(20)의 샤프트(20a)가 제2도 (a)에 도시된 바와 같이 잠금편(10)의 구멍(10a)에 끼워져 후크(2)이외에 잠금편(10)이 솔레노이드(20)에 의해 잠겨져 안전하게 도어가 잠기게 된다.Accordingly, the shaft 20a of the solenoid 20 is fitted into the hole 10a of the locking piece 10 as shown in FIG. 2 (a), so that the locking piece 10 besides the hook 2 is the solenoid 20. Locked by the door, the door is securely locked.

이상에서 상세히 설명한 바와 같이 전자렌지의 잘못 사용으로 인해 밀폐된 용기를 사용하는 조리를 장시간 하였을때 밀폐된 조리용기가 폭발한다 하더라도 잠금편(10)의 구멍(10a)에 솔레노이드(20)의 샤프트(20a)가 끼워져 고정되어 있으므로, 전자렌지의 도어(1)가 안전하게 닫혀진 상태가 유진되어 깨어진 파편이 튀어나오는 위험을 방지할 수 있게 된다.As described in detail above, even when the cooking vessel using the sealed container explodes due to misuse of the microwave for a long time, the shaft of the solenoid 20 in the hole 10a of the locking piece 10 may be exploded. Since 20a) is fitted and fixed, the state in which the door 1 of the microwave oven is safely closed is used to prevent the risk of the broken fragments popping out.

Claims (1)

전자렌지 도어에 한쌍의 도어후크 이외에 구멍(10a)을 가진 잠금편(10)을 돌설하고, 그 잠금편(10)의 구멍(10a)에 샤프트(20a)가 끼워지는 솔레노이드(20)를 전면판(3) 내측에 설치하여 이루어진 전자렌지에 있어서, 제1스위치(RY11)에 의해 각 부하구동 전원을 제어하는 시작릴레이(RY1)를 상기 제1스위치(RY11)와 연동되는 제2스위치(RY12)가 있는 릴레이로 설치하고, 그 시작릴레이(RY1)의 제2스위치(RY12)를 통하여 저압트랜스(L.V.T)의 출력전원이 직류정류부(21)를 통하여 상기한 솔레노이드(20)에 인가될 수 있도록 결선하여 구성한 것을 특징으로 하는 전자렌지의 도어안전회로.In addition to the pair of door hooks in the microwave door, the lock piece 10 having a hole 10a is protruded, and the solenoid 20 in which the shaft 20a is fitted into the hole 10a of the lock piece 10 is mounted on the front plate. (3) In the microwave oven installed inside, a start switch RY1 for controlling each load driving power supply by the first switch RY11 and a second switch RY12 interlocked with the first switch RY11. And the output power of the low voltage transformer LVT can be applied to the solenoid 20 through the DC rectifier 21 through the second switch RY12 of the start relay RY1. Door safety circuit of a microwave oven, characterized in that the configuration.
KR1019940027471A 1994-10-26 1994-10-26 Door for a microwave oven KR970004677B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940027471A KR970004677B1 (en) 1994-10-26 1994-10-26 Door for a microwave oven

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Application Number Priority Date Filing Date Title
KR1019940027471A KR970004677B1 (en) 1994-10-26 1994-10-26 Door for a microwave oven

Publications (2)

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KR960014796A KR960014796A (en) 1996-05-22
KR970004677B1 true KR970004677B1 (en) 1997-04-02

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KR1019940027471A KR970004677B1 (en) 1994-10-26 1994-10-26 Door for a microwave oven

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412105B1 (en) * 2000-10-18 2003-12-24 삼성전자주식회사 Microwave oven

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KR960014796A (en) 1996-05-22

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