KR940000978Y1 - Error-stop circuit of microwave oven at cooking - Google Patents

Error-stop circuit of microwave oven at cooking Download PDF

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Publication number
KR940000978Y1
KR940000978Y1 KR2019880006189U KR880006189U KR940000978Y1 KR 940000978 Y1 KR940000978 Y1 KR 940000978Y1 KR 2019880006189 U KR2019880006189 U KR 2019880006189U KR 880006189 U KR880006189 U KR 880006189U KR 940000978 Y1 KR940000978 Y1 KR 940000978Y1
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contact
microcomputer
plug
temperature
cooking
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KR2019880006189U
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KR890022205U (en
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신성운
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주식회사 금성사
최근선
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2825—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere in household appliances or professional audio/video equipment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Abstract

내용 없음.No content.

Description

전자레인지의 온도요리시 에러 방지회로Error prevention circuit when cooking temperature of microwave

제1도는 종래의 온도요리 회로도.1 is a conventional temperature cooking circuit diagram.

제2도는 본 광의 온도요리 회로도.2 is a temperature cooking circuit diagram of the light.

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

11 : 플러그 11a : 슬리브11 plug 11a sleeve

11b : 팁 12 : 잭11b: Tip 12: Jack

12a : 출입구 12b-12f : 접점12a: Doorway 12b-12f: Contact

13 : 신호변환부 14 : 마이콤13: signal conversion unit 14: micom

15 : 지연기15: delay

본 고안은 온도프로브가 감지하는 음식물의 가열온도에 따라 마이콤이 음식물을 자동으로 요리하는 전자레인지에 있어서, 온도프로브에 연결된 플러그와 그 플러그가 끼워지는 잭간의 접속이상으로 인하여 발생되는 에러를 방지하는 온도 요리시 에러 방지회로에 관한 것으로, 특히 턴테이블로 음식물을 회전시키면서 온도요리를 하는 전자레인지에 적당하도록한 전자레인지의 온도요리시 에러 방지회로에 관한 것이다.The present invention is a microwave oven for cooking food automatically according to the heating temperature of the food detected by the temperature probe, to prevent an error caused by the connection error between the plug connected to the temperature probe and the jack to which the plug is inserted The present invention relates to an error prevention circuit for temperature cooking, and more particularly, to an error prevention circuit for temperature cooking of a microwave oven which is adapted to a microwave oven for cooking temperature while rotating food on a turntable.

종래의 턴테이블을 구비하여 온도요리를 하는 전자레인지는 제1도에 도시된 바와같이 온도프로브에 연결된 플러그(1)가 끼워지는 잭(2)의 출입구(2a) 및 내측 중간부에 플러그(1)의 슬리브(1a)와 접촉되는 접점(2b)(2c)이 설치되고, 잭(2)의 내측 상부에는 플러그(1)의 팁(1b)과 접촉되는 접점(2d)이 설치되어 접점(2d)이 설치되어 접점(2b)은 접지되고, 접점(2c)은 저항(R1) 및 콘덴서(C1), 마이콤(4)의 구동 신호입력단자(DR1)에 접속되며, 접점(2d)은 저항(R2-R10), 콘덴서(C2-C4), 정전압다이오드( ZD1), 다이오드(D1), 트랜지스터(TR1) 및 집적소자(IC1)로 된 신호변환부(3)를 통해 마이콤(4)의 입력단자(IN1-IN3)에 접속되게 구성하였다.In a microwave oven equipped with a conventional turntable for temperature cooking, as shown in FIG. 1, the plug 1 at the entrance 2a and the inner middle portion of the jack 2 into which the plug 1 connected to the temperature probe is fitted. Contacts (2b) (2c) are provided in contact with the sleeve (1a) of the contact, and a contact (2d) is provided on the inner upper portion of the jack (2) in contact with the tip (1b) of the plug The contact 2b is grounded, the contact 2c is connected to the resistor R 1 , the capacitor C 1 , and the drive signal input terminal DR 1 of the microcomputer 4, and the contact 2d is Signal converting section (3) consisting of resistors (R 2 -R 10 ), capacitors (C 2 -C 4 ), constant voltage diodes (ZD 1 ), diodes (D 1 ), transistors (TR 1 ), and integrated devices (IC 1 ) It is configured to be connected to the input terminal (IN 1 -IN 3 ) of the microcomputer (4) through.

제1도의 도면 설명중 미설명 부호 Vcc1, -Vcc2, -Vcc3은 전원단자이다.The reference numeral of FIG. 1 explained drawings V cc1, cc2 -V, -V cc3 is a power supply terminal.

이와같이 구성된 종래의 전자레인지는 전원단자(Vcc1, -Vcc2, -Vcc3)에 전원이 인가되고, 요리할 음식물을 턴테이블에 얹어 온도프로브를 그 음식물에 꽂음과 아울러 온도프로브에 연결된 플러그(11)를 잭(12)에 끼우면, 마이콤(4)의 구동신호입력단자( DR1)가 잭(12)의 접점(2c), 플러그(11)의 슬리브(1a), 잭(12)의 접점(2b)을 통해 접지되므로 마이콤(14)은 온도요리를 수행함을 감지하게 된다.Thus the conventional microwave oven is configured power terminals (V cc1, cc2 -V, -V cc3) is applied to the power supply, topped with the food to cook on the turntable is connected to the temperature probe and the engagement as well as temperature probes for the food plug (11 ) Is inserted into the jack 12, the drive signal input terminal DR 1 of the microcomputer 4 is the contact (2c) of the jack 12, the sleeve (1a) of the plug 11, the contact of the jack ( Since it is grounded through 2b), the microcomputer 14 senses that temperature cooking is performed.

그리고, 온도요리를 함에 따라 음식물에 끼운 온도프로브가 음식물의 가열온도를 감지하고, 그 감지한 음식물의 가열온도를 플러그(11)의 팁(1b) 및 잭(12)의 접점(2d)을 통해 신호변환부(13)에서 변환되어 마이콤(14)의 입력단자(IN1-IN3)로 입력되므로 마이콤(14)은 입력단자(IN1-IN3)로 입력되는 음식물의 가열온도에 따른 신호로 음식물의 가열온도를 감지하면서 온도요리를 수행하게 된다.As the temperature is cooked, the temperature probe inserted in the food senses the heating temperature of the food, and the detected heating temperature of the food is measured through the tip 1b of the plug 11 and the contact 2d of the jack 12. The signal is converted by the signal conversion unit 13 and input to the input terminals (IN 1 -IN 3 ) of the microcomputer 14, the microcomputer 14 is a signal according to the heating temperature of the food input to the input terminals (IN 1 -IN 3 ) The temperature cooking is performed while sensing the heating temperature of the food.

그러나, 이와같은 종래의 전자레인지는 접점(2c)(2d)과 슬리브(1a) 및 립(1b)이 한점에서만 접촉되므로 턴테이블의 회전에 따라 음식물이 회전하여 온도프로브가 회전하고, 플러그(1)가 회전하여 접점(2c)(2d)과 슬리브(1a) 및 팁(1b)이 접촉 및 개방을 반복하는 현상이 발생하며, 접점(2c)과 슬리브(1a)간의 접촉이 개방됨에 따라 마이콤(4)의 구동신호입력단자(DR1)로 전원단자(-Vcc3)의 마이너스전원이 저항(R1)을 통해 입력되므로 마이콤(14)이 오동작을 하게됨은 물론 접점(2d)과 팁(1b)의 접촉이 개방됨에 따라 음식물의 가열에 따른 온도의 신호가 마이콤(14)에 정확히 입력되지 못하여 마이콤1(4)이 에러를 표시하고, 온도지시값이 정확하지 못하며, 음식물의 온도요리를 정확히 수행하지 못하게 되는 결함이 있었다.However, in the conventional microwave oven, since the contacts 2c and 2d and the sleeve 1a and the lip 1b are in contact only at one point, the food is rotated in accordance with the rotation of the turntable, and the temperature probe is rotated. Is rotated so that the contacts 2c and 2d and the sleeve 1a and the tip 1b are repeatedly contacted and opened. Negative power of the power supply terminal (-V cc3 ) is input through the resistor (R 1 ) to the drive signal input terminal (DR 1 ) of the microcomputer 14, thereby causing the microcomputer 14 to malfunction. As the contact of is opened, the signal of temperature according to the heating of the food is not inputted correctly to the microcomputer 14, so the microcomputer 1 (4) displays an error, the temperature indication value is not correct, and the food temperature cooking is performed correctly. There was a defect that could not be.

본 고안은 이와같은 종래의 결함을 감안하여, 플러그와 잭간의 접속을 보강함과 아울러 마이콤에 입력되는 구동신호를 일정시간 지연시켜 에러를 방지하게 안출한 것으로, 이를 첨부된 제2도의 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is designed to prevent the error by reinforcing the connection between the plug and jack, and delay the driving signal input to the microcomputer for a certain time in view of such a conventional defect, according to the accompanying drawings of FIG. It will be described in detail as follows.

제2도는 본 고안의 온도요리회로도로서, 이에 도시된 바와같이 온도프로브의 플러그(11)가 끼워지는 잭(12)의 접점(12c)이 마이콤(14)의 구동신호입력단자(DR11)에 접속되고, 접점(12d)이 신호변환부(13)를 통해 마이콤(14)의 입력단자(IN11-IN13)에 접속된 전자레인지에 있어서, 상기 접점(12c)(12d)과 대향되게 접점(12e)(12f)을 형성하여 플러그(11)의 슬리브(11a) 및 팁(11b)에 접촉되게 하고, 그 접점(12c)을 잭(12)의 출입구(12a)에 형성된 접점(12b)과 공통으로 접지함과 아울러 접점(12e)을 저항(R20-R22)및 콘덴서(C14, C15), 다이오드(D12)로된 지연기(15)를 통해 마이콤(14 )의 구동신호입력단자(DR11)에 접속하며, 접점(12f)은 접점(12d)과 함께 신호변환부 (13)의 입력단자에 공통으로 접속하여 구성한 것이다.2 is a temperature cooking circuit diagram of the present invention, in which the contact 12c of the jack 12 into which the plug 11 of the temperature probe is fitted is connected to the drive signal input terminal DR 11 of the microcomputer 14. In a microwave oven connected to the input terminals IN 11 -IN 13 of the microcomputer 14 via a signal conversion section 13, the contacts being opposed to the contacts 12c, 12d. (12e) (12f) to make contact with the sleeve (11a) and the tip (11b) of the plug 11, the contact (12c) and the contact (12b) formed in the entrance (12a) of the jack 12 and In addition to grounding in common, the drive signal of the microcomputer 14 is connected to the contact point 12e through the retarder 15 including the resistors R 20 -R 22 , the capacitors C 14 , C 15 , and the diode D 12 . and connected to an input terminal (DR 11), the contact (12f) is configured and connected in common to the input terminal of the signal converter (13) with a contact (12d).

제2도의 도면 설명중 미설명 부호 Vcc1, -Vcc2, -Vcc3은 전원단자이다.The reference numeral of 2 degrees drawings described V cc1, cc2 -V, -V cc3 is a power supply terminal.

이와같이 구성된 종래의 전자레인지는 전원단자(Vcc1,-Vcc2,-Vcc3)에 전원이 인가되고, 요리할 음식물을 턴테이블에 얹어 온도프로브를 그 음식물에 꽂음과 아울러 온도프로브에 연결된 플러그(11)를 잭(12)에 끼워면, 플러그(11)의 슬리브(11a)가 잭(12)의 접점(12b, 12c)을 통해 접지되고, 접점(12c)의 접지전위가 슬리브(11a), 접점(12e)및 저항(R22)을 통해 콘덴서(C15)에 충전됨과 아울러 다이오드(D12)및 저항(R21)을 통해 콘덴서(C12)에 충전되어 마이콤(14)의 구동신호입력단자(DR11)로 입력된다.Thus the conventional microwave oven is configured power terminals (V cc1, cc2 -V, -V cc3) is applied to the power supply, topped with the food to cook on the turntable is connected to the temperature probe and the engagement as well as temperature probes for the food plug (11 ) Into the jack 12, the sleeve 11a of the plug 11 is grounded through the contacts 12b, 12c of the jack 12, and the ground potential of the contact 12c is the sleeve 11a, the contact. Charged to capacitor C 15 through 12e and resistor R 22 and charged to capacitor C 12 through diode D 12 and resistor R 21 to drive signal input terminals of the microcomputer 14. (DR 11 ).

이때, 콘덴서(C12)의 충전시정수는 다음의 식과같다.At this time, the charging time constant of the capacitor C 12 is as follows.

Rx=Vc=t=-Rx·C12·1n()여기서, Vc는 콘덴서(C12)의 충전위전위이고, tc는 충전시정수이며, Rx는 저항(R21, R22)의 병렬 합성저항이며, e는 자연대수이며, 1n은 자연로그이다.R x = V c = t = -R x C 12 1 n ( Where V c is the charging potential of the capacitor (C 12 ), t c is the charging time constant, R x is the parallel composite resistance of the resistors (R 21 , R 22 ), e is a natural logarithm, and 1n is Natural log.

상기에서, 마이콤(14)이 고전위로 감지하는 전위가 -2.5V이상이라고 가정하고, 저항(Rx)을 1.92㏀으로 설정하고, 콘덴서(C15)는 100㎌로 설정하며, 전원단자(-Vcc13)에 -9V가 인가되게 하면, 콘덴서(C15)에 충전되는 전위가 -2.5V로 될때까지 약 344msec가 소요된다.In the above, it is assumed that the potential detected by the microcomputer 14 at high potential is -2.5 V or more, the resistance R x is set to 1.92 kV, the capacitor C 15 is set to 100 kV, and the power supply terminal (- When applied to the -9V to be V cc13), the potential charged in the capacitor (C 15) takes about 344msec until a -2.5V.

즉, 잭(12)에 온도프로브(11)를 끼우면, 약 344msec 후에 마이콤(14)의 구동신호입력단자(DR11)로 -2.5V가 입력되므로 마이콤(14)은 온도요리를 수행함을 감지하게 된다.That is, when the temperature probe 11 is inserted into the jack 12, after about 344 msec, -2.5V is input to the drive signal input terminal DR 11 of the microcomputer 14 so that the microcomputer 14 senses that temperature cooking is performed. do.

그리고, 온도요리를 함에 따라 가열된 음식물의 온도를 온도프로브가 감지하고, 감지한 음식물의 온도는 플러그(11)의 팁(11b)및 접점(12d)(12f)을 통해 신호변환부 (13)에서 신호변환되어 마이콤(14)의 입력단자(IN11-IN13)로 입력되므로 마이콤(1 4)은 입력단자(IN11-IN13)로 입력되는 음식물의 가열온도에 따라 음식물의 온도요리를 수행하게 된다.In addition, the temperature probe detects the temperature of the heated food as the temperature is cooked, and the detected food temperature is converted into the signal conversion unit 13 through the tips 11b and the contacts 12d and 12f of the plug 11. Since the signal is converted from and input to the input terminal (IN 11 -IN 13 ) of the microcomputer 14, the microcomputer (1 4) according to the heating temperature of the food input to the input terminal (IN 11 -IN 13 ) of the food cooking temperature Will be performed.

이와같이 동작함에 있어서, 턴테이블의 회전에 따라 플러그(11)가 회전되어도 두개의 접점(12c, 12e)(12d, 12f)이 플러그(11)의 슬리브(11a) 및 팁(11b)의 양측에서 접촉되므로 슬리브(11a) 및 팁(11b)과 접점(12c, 12e)(12d, 12f)이 확실하게 접속되고, 또한 플러그(11)의 회전에 따라 슬리브(11a)와 접점(12e)이 일시적으로 접촉되지 않아도 지연기(15)의 지연동작에 의하여 마이콤(14)의 오동작을 방지하게 된다.In this operation, since the two contacts 12c, 12e, 12d, 12f are in contact with both sides of the sleeve 11a and the tip 11b of the plug 11 even when the plug 11 is rotated in accordance with the rotation of the turntable. The sleeve 11a and the tip 11b and the contacts 12c and 12e and 12d and 12f are reliably connected, and the sleeve 11a and the contact 12e are not temporarily contacted with the rotation of the plug 11. Even if the delay of the delay device 15, the malfunction of the microcomputer 14 is prevented.

즉, 접점(12e)과 슬리브(11a)가 접촉되지 않았을 경우에 콘덴서(C15)의 충전전위는 저항(R22)(R20)을 통해 전원단자(-Vcc13)로 방전되고, 다이오드(D12)는 차단상태로 되어 저항(R21)을 통해서는 방전되지 않으며, 이때 콘덴서(C15)의 방전시정수는 다음의 식과같다.That is, when the contact 12e and the sleeve 11a are not in contact with each other, the charging potential of the capacitor C 15 is discharged to the power supply terminal (-V cc13 ) through the resistor R 22 (R 20 ) and the diode ( D 12 ) is cut off and is not discharged through the resistor R 21. At this time, the discharge time constant of the capacitor C 15 is expressed by the following equation.

여기서, RY는 저항 (R20,R22)의 직틸합성저항이고, VD는 콘덴서(C15)의 방전전위이며, tD는 콘덴서(C15)의 방전시정수이다. Wherein, R Y is jiktil combined resistance of the resistor (R 20, R 22), V D is the discharge potential of the capacitor (C 15), t D is the number of the discharge time constant of the capacitor (C 15).

상기에서 콘덴서(C15)의 최대 충전전위가 접지전위이고, 마이콤(14)의 저전위로 감지하는 전위가 -4V 이하라고 가정하며, 저항(RY)의 값을 49㏀으로 설정하면, 콘덴서(C15)의 전위가 -4V이하로 방전될 때까지 약 2.88sec가 소요된다.In the above, it is assumed that the maximum charging potential of the capacitor C 15 is the ground potential, and that the potential detected by the low potential of the microcomputer 14 is -4 V or less, and when the value of the resistor R Y is set to 49 kV, the capacitor ( It takes about 2.88 sec until the potential of C 15 ) is discharged below -4V.

즉, 접점(12e)이 슬리브(11a)와 접촉되지 않을때 약 2.88sec 후에 마이콤(14 )이 구동신호입력단자(DR11)로 저전위가 입력됨을 감지하므로 플러그(11)의 회전에 따라 접점(12e)가 슬리브(11a)의 순간적으로 접촉되지 않아도 마이콤(14)은 오동작을 하지않게 된다.That is, when the contact 12e is not in contact with the sleeve 11a, the microcomputer 14 detects that the low potential is input to the driving signal input terminal DR 11 after about 2.88 sec. Even if 12e is not instantaneously in contact with the sleeve 11a, the microcomputer 14 does not malfunction.

이상에서 상세히 설명한 바와같이 본 고안은 플러그와 잭간을 이중으로 하여 플러그가 회전되어도 플러그와 잭이 확실하게 접촉됨은 물론 지연기를 사용하여 마이콤에 구동신호를 입력시키므로 마이콤의 오동작을 방지할 수 있는 효과가 있다.As described in detail above, the present invention doubles the plug and the jack, so that the plug and the jack are surely contacted even when the plug is rotated, and the driving signal is input to the micom by using a delay, thereby preventing the malfunction of the micom. have.

Claims (1)

온도프로브의 플러그(11)가 끼워지는 잭(12)의 접점(12c)이 마이콤(14)의 구동신호입력단자(DR11)에 접속되고, 접점(12d)이 신호변환부(13)를 통해 마이콤(14)의 입력단자(IN11-IN13)에 접속된 전자레인지에 있어서, 상기 접점(12c)(12d)과 대향되게 접점(12e)(12f)을 형성하여 상기 플러그(11)의 슬리브(11a) 및 팁(11b)과 접촉되게 함과 아울러 접점(12c)과 잭(12)의 출입구(12a)에 형성한 접점(12b)을 공통접지하고, 접점(12e)은 지연기(15)를 통해 상기 마이콤(14)의 입력단자(DR11)에 접속하며, 접점(12f)은 접점(12d)과 함께 신호변환부(13)의 입력단자에 공통으로 접속하여 구성함을 특징으로 하는 전자레인지의 온도 요리시 에러 방지회로.The contact 12c of the jack 12, into which the plug 11 of the temperature probe is fitted, is connected to the drive signal input terminal DR 11 of the microcomputer 14, and the contact 12d is connected via the signal conversion unit 13. In a microwave oven connected to the input terminals (IN 11 -IN 13 ) of the microcomputer 14, the sleeves of the plug 11 are formed by forming the contacts 12e and 12f to face the contacts 12c and 12d. While making contact with the tip 11b and the tip 11b, the contact 12c and the contact 12b formed at the entrance 12a of the jack 12 are commonly grounded, and the contact 12e is the retarder 15. It is connected to the input terminal (DR 11 ) of the microcomputer 14 through, the contact 12f is characterized in that the connection to the input terminal of the signal conversion unit 13 with the contact 12d in common Error prevention circuit when cooking the temperature range.
KR2019880006189U 1988-04-29 1988-04-29 Error-stop circuit of microwave oven at cooking KR940000978Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019880006189U KR940000978Y1 (en) 1988-04-29 1988-04-29 Error-stop circuit of microwave oven at cooking

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Application Number Priority Date Filing Date Title
KR2019880006189U KR940000978Y1 (en) 1988-04-29 1988-04-29 Error-stop circuit of microwave oven at cooking

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KR890022205U KR890022205U (en) 1989-11-03
KR940000978Y1 true KR940000978Y1 (en) 1994-02-25

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