KR940000974Y1 - Search timing limitation circuit of induction cook top - Google Patents

Search timing limitation circuit of induction cook top Download PDF

Info

Publication number
KR940000974Y1
KR940000974Y1 KR2019880013673U KR880013673U KR940000974Y1 KR 940000974 Y1 KR940000974 Y1 KR 940000974Y1 KR 2019880013673 U KR2019880013673 U KR 2019880013673U KR 880013673 U KR880013673 U KR 880013673U KR 940000974 Y1 KR940000974 Y1 KR 940000974Y1
Authority
KR
South Korea
Prior art keywords
output
unit
amplifier
search
control
Prior art date
Application number
KR2019880013673U
Other languages
Korean (ko)
Other versions
KR900006005U (en
Inventor
선용호
Original Assignee
주식회사 금성사
최근선
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 금성사, 최근선 filed Critical 주식회사 금성사
Priority to KR2019880013673U priority Critical patent/KR940000974Y1/en
Publication of KR900006005U publication Critical patent/KR900006005U/en
Application granted granted Critical
Publication of KR940000974Y1 publication Critical patent/KR940000974Y1/en

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

내용 없음.No content.

Description

인덕션 쿡톱의 서치시간 제한회로Search time limit circuit of induction cooktop

첨부된 도면은 본 고안의 서치시간 제안회로도.The accompanying drawings are a search time suggestion circuit diagram of the present invention.

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

10 : 서치키이입력부 20 : 서치시간제어부10: search key input unit 20: search time control unit

30 : 릴레이구동부 1 : 전원공급부30: relay drive unit 1: power supply unit

2 : 출력레벨조정부 3 : 입력전류감지부2: Output level adjusting unit 3: Input current detecting unit

4 : 용기감지부 5 : 쿡톱제어부4: container detection unit 5: cooktop control unit

6 : 전압조정부 7 : 서치발생부6: Voltage adjusting part 7: Search generating part

8 : 부저 및 LED 구동부 9 : 드라이브8: buzzer and LED driver 9: drive

R1-R14: 저항 Q1-Q6: 트랜지스터R 1 -R 14 : Resistor Q 1 -Q 6 : Transistor

D1-D13: 다이오드 AD1: 제너다이오드D 1 -D 13 : Diode AD 1 : Zener Diode

OP1-OP6: OP 엠프 S1, S2: 타치키이OP 1 -OP 6 : OP amplifier S 1 , S 2 : Tachiki

RL1, RL2: 릴레이코일 RS1, RS2: 릴레이스위치RL 1 , RL 2 : Relay coil RS 1 , RS 2 : Relay switch

T1: 트랜스 BD1, BD2: 정류기T 1 : Trans BD 1 , BD 2 : Rectifier

WC : 워크코일WC: Work coil

본 고안은 인덕션 쿡톱(Induction Cook Top)에 관한 것으로, 특히 마이크로프로세서를 사용하지 않는 인덕션 쿡톱의 경우에 서치시간을 제한하도록 한 인덕션 쿡톱의 서치시간 제한회로에 관한 것이다.The present invention relates to an induction cook top, and more particularly, to a search time limiting circuit of an induction cooktop for limiting the search time in an induction cooktop that does not use a microprocessor.

일반적으로 4개의 워크코일(Work Coil)을 갖는 인덕션 쿡톱의 경우에는 마이크로프로세서를 이용하여, 서치시간을 제한 하였으나 1개 또는 2개의 워크코일을 갖는 경우에는 서치시간을 제한하는 회로가 없었기 때문에 파우어가 불필요하게 소비될 뿐 아니라 부주의로 인한 원치않는 부하가 계속 가열되는 결함이 있었다.In general, an induction cooktop having four work coils uses a microprocessor to limit the search time, but when one or two work coils have a circuit to limit the search time, Not only was it consumed unnecessarily, but there was a defect that the inadvertent unwanted load continued to heat up.

본 고안은 이와같은 종래의 결함을 감안하여 서치키이로 구동되는 릴레이 구동회로로 서치 발생부의 구동시간을 일정한 시간으로 제어함으로써 불필요한 소비전력, 부주의로 인한 부하의 가열을 제거하도록한 인덕션 쿡톱의 서치시간 제한회로를 안출한 것으로, 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.The present invention, in view of such a conventional defect, the search time of the induction cooktop to remove unnecessary power consumption, inadvertent heating of the load by controlling the drive time of the search generator to a certain time by a relay drive circuit driven by a search key A limited circuit is devised, which will be described in detail with reference to the accompanying drawings.

첨부된 도면은 본 고안의 서치시간 제한회로도로서, 이에 도시한 바와같이, 트랜스(T1), 정류기(BD2)를 통과한 입력교류전원(AC)이 평활용콘덴서(C5), 정전압용 제너다이오드(ZD2), 바이어스 저항(R14)과 접속된 트랜지스터(Q5)를 통해 정전압인출되어 각부에 전원(B+)을 공급하게한 전원공급부(1)와, 입력되는 교류전원(AC)을 감지하는 입력전류감지부(3)의 출력이 기준전원(Vref)을 설정한 비교기용 OP 앰프(OP5)를 통해 트랜지스터(Q4)를 제어하여, OP 앰프(OP4)를 통해 감지되는 출력레벨조정부( 2)의 출력을 제어하여 워크코일(WC)상의 용기를 감지하게한 용기감지부(4)와, 상기한 용지감지부(4)의 OP 앰프(OP5)의 출력으로 구동되어 다이오드(D12)를 통해 트랜지스터(Q3)를 제어함에 따라 서치기능을 수행하게한 서치발생부(7)와, 상기한 OP 앰프(O P4)를 통과한 출력레벨 조정부(2)의 출력으로 구동되어 부저(BUZZER), 발광램프(L ED)를 구동하게한 부저 및 LED 구동부(8)와, 상기한 OP 앰프(OP4)를 통과한 출력레벨조정부(2)의 전압을 조정하게한 전압조정부(6)와, 워크코일(WC)의 상태를 비교하게한 OP 앰프(OP6), 상기한 전압조정부(6)의 출력의 제어를 통해 구동되는 드라이브 (9)의 출력이 정류기(BD1)를 통과한 교류전원(AC)과 함께 콘덴서(C4), 다이오드(D14)와 접속된 트랜지스터(Q6)를 제어하여 워크코일(WC)을 제어하게한 쿡톱제어부(5)로 구성된 쿡톱회로에 있어서, 전원(B+) 분배저항(R5-R9)을 통해 서치용타치키이(S1)( S2)의 온/오프상태를 비교하는 OP 앰프(OP1)의 출력이 볼테지플로어용 OP 앰프(OP2), 다이오드(D3)를 통해 후단을 제어하게한 서치키입력부(10)와, 상기한 서치키이입력부(10)의 출력이 각각의 방향제어용다이오드(D10)(D11), 바이어스저항(R1-R4)을 통해 트랜지스터(Q1)(Q2)를 구동한후 병렬접속된 다이오드(D1)(D2), 릴레이코일(RL1)( RL2)을 통해 릴레이스위치(RS1)(RS2)를 제어하여, 상기한 정류기(BD1)의 입력전원( AC), 전원조정부(6)의 입력전원을 제어하게한 릴레이구동부(30)와, 상기한 릴레이 스위치(RS2)를 통과한 전압조정부(6)의 입력전원이 저항(R11-R13), 콘덴서(C2), 다이오드(D9)를 통해 OP 앰프(OP3)의 반전(-)측에 인가된후 분배저항(R10)을 통과한 전원(B+)과 비교되어 다이오드(D4-D6), 콘덴서(C1)를 통해 상기한 OP 앰프(OP1)(O P2)의 출력을 제어함과 아울러 다이오드(D7)(D8)를 통해 서치용 타치키이(S1)(S2)를 제어하여, 서치시간을 제어하게한 서치사간제어부(20)로 구성한 것이다 .The accompanying drawings are a search time limit circuit diagram of the present invention, and as shown therein, the input AC power passing through the transformer (T 1 ) and the rectifier (BD 2 ) is a smoothing capacitor (C 5 ), for constant voltage The power supply unit 1 which draws a constant voltage through the transistor Q 5 connected to the zener diode ZD 2 and the bias resistor R 14 to supply the power B + to each part, and the input AC power AC. The output of the input current sensing unit 3 for detecting the control of the transistor (Q 4 ) through the comparator OP amplifier (OP 5 ) with the reference power supply (Vref) is set, the sensed through the OP amplifier (OP 4 ) It is driven by the output of the OP detector OP 5 of the container sensing unit 4 which controls the output of the output level adjusting unit 2 to sense the container on the work coil WC, and the paper sensing unit 4. As the transistor Q 3 is controlled through the diode D 12 , the search generator 7 performs a search function, and the OP amplifier OP 4 is passed through. The buzzer and LED driver 8 driven by the output of the output level adjusting unit 2 and driving the buzzer, the light emitting lamp L ED, and the output level adjusting unit passing through the above-described OP amplifier OP 4 . The drive driven through the control of the output of the voltage adjusting section 6, which adjusts the voltage of (2), the OP amplifier OP 6 , which compares the state of the work coil WC, and the voltage adjusting section 6 described above. The work coil WC is controlled by controlling the transistor Q 6 connected to the capacitor C 4 and the diode D 14 together with the AC power source AC whose output is passed through the rectifier BD 1 . to in one kuktop kuktop circuit consisting of the control section 5, the power source (B +) distributed resistance (R 5 -R 9) search through yongta chikiyi (S 1) OP amp for comparing the oN / oFF states of the (S 2) The output of the OP 1 and the search key input unit 10 for controlling the rear stage through the OPT OP 2 and the diode D 3 for the voltage floor, and the output of the search key input unit 10 are respectively. Room Control diode (D 10) (D 11) , the bias resistor (R 1 -R 4) of the transistor (Q 1) connected in parallel to the diode (D 1) after the drive (Q 2) through (D 2), the relay coil By controlling the relay switch RS 1 (RS 2 ) through (RL 1 ) (RL 2 ), it is possible to control the input power (AC) of the rectifier (BD 1 ) and the input power of the power adjusting unit (6). The input power of the relay driving unit 30 and the voltage adjusting unit 6 passing through the relay switch RS 2 is OP through the resistors R 11- R 13 , the capacitor C 2 , and the diode D 9 . It is applied to the inverting (-) side of the amplifier OP 3 and compared with the power supply B + that passed through the distribution resistor R 10 , and the above-mentioned through the diode (D 4 -D 6 ), the capacitor (C 1 ) By controlling the output of the OP amplifier OP 1 (OP 2 ) and controlling the search Tachiki S 1 (S 2 ) through the diodes D 7 and D 8 , the search time is controlled. It is composed of a search intercompany control unit (20).

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

초기의 무부하상태에서 서치용 타치키이(S1)를 온시키게되면, 분배저항(R5)(R6)을 통과한 전원이 타치키이(S1)를 통해 접지로 흐르게 되어 분배저항(R7)(R8)을 통해 OP 앰프(OP1)의 비반전(+)측에 인가되는 전원(B+)이 반전(-)측의 전원보다 높게됨에 따라 OP 앰프(OP)의 출력측에 고전위가 인가된후 콘덴서(C1)를 충전시킨다.When the search Tachiki (S 1 ) is turned on at the initial no-load state, the power passing through the distribution resistors (R 5 ) and (R 6 ) flows to the ground through the Tachiki (S 1 ) to distribute the distribution resistors (R 7). As the power (B +) applied to the non-inverting (+) side of the OP amplifier OP 1 through R 8 ) becomes higher than the power of the inverting (-) side, the high potential is applied to the output side of the OP amplifier (OP). After being applied, the capacitor C 1 is charged.

그리고 OP 앰프(OP1)의 고전위가 OP 앰프(OP2), 다이오드(D3)를 통과한후 각각의 다이오드(D10)(D11), 바이어스저항(R1-R4)을 통해 트랜지스터(Q1)(Q2)를 턴온시킨후 릴레이코일(RL1)(RL2)을 여자시켜, 릴레이스위치(RS1)(RS2)를 온시킴에 따라 입력교류전원(AC)이 정류기(BD1)를 통해 워크코일(WC)을 구동하고, 한편, 서치발생부(7)가 용기감지용 OP 앰프(OP5)의 출력에 의해 구동되어 트랜지스터(Q3)를 턴온시킴에 따라 서치기능이 수행되며, 이때 부저 및 LED 구동부(8)를 통해 서치기능의 시작이 감지된다.The high potential of the OP amplifier OP 1 passes through the OP amplifier OP 2 and the diode D 3 , and then through each of the diodes D 10 (D 11 ) and the bias resistors R 1 -R 4 . As the transistors Q 1 and Q 2 are turned on, the relay coils RL 1 and RL 2 are excited to turn on the relay switches RS 1 and RS 2 . The work coil WC is driven through the BD 1 , while the search generation unit 7 is driven by the output of the container sensing OP amplifier OP 5 to turn on the transistor Q 3 . The function is performed, and the start of the search function is sensed through the buzzer and the LED driver 8.

이와 동시에 릴레이스위치(RS2)를 통과한 전압조정부(6)의 입력전원이 저항(R12)(R13), 다이오드(D9)를 통해 콘덴서(C2)를 충전시키면서 OP 앰프(OP1)의 반전(-)측에 인가되어 저항(R10)을 통해 OP 앰프(OP3)의 비반전(+)측에 인가된 전원( B+)보다 높게 됨에 따라 OP 앰프(OP3)의 출력측이 저전위로 된다.At the same time, the input power of the voltage adjusting unit 6 passing through the relay switch RS 2 charges the capacitor C 2 through the resistors R 12 (R 13 ) and the diode D 9 while the OP amplifier OP 1 a) is applied to the side output of the OP amplifier (OP 3) as higher than the power source (B +) is applied to the non-inverting (+) side of the OP amplifier (OP 3) via a resistor (R 10) -), reversal (of Low potential.

이때 콘덴서(C1)의 충전전원이 다이오드(D6)를 통해 방전되어 OP앰프(OP1)( OP2)의 출력측에 저전위로 됨에 따라 트랜지스터(Q1)(Q2)의 베이스측에 저전위 바이어스가 인가되어 트랜지스터(Q1)(Q2)를 턴온시키므로 릴레이코일(RL1)(RL2)의 여자가 해제되어 릴레이스위치(RS1)(RS2)를 오프시킴으로써 서치동작이 끝나게 된다.The capacitor (C 1) stored in the base side of the transistor (Q 1) (Q 2) as the charged power is discharged via the diode (D 6) over the low potential at the output of the OP amplifier (OP 1) (OP 2) for Since the potential bias is applied to turn on the transistors Q 1 and Q 2 , the excitation of the relay coils RL 1 and RL 2 is released to turn off the relay switches RS 1 and RS 2 , thereby completing the search operation. .

그후 다시 타치키이(S1)를 온시키게되면 콘덴서(C2)의 충전전원이 다이오드(D8)를 통해 방전되어 OP 앰프(OP3)의 비반전(+)측 전원이 상승됨에 따라 OP 앰프(OP3)의 출력측이 고전위상태로 되며, 이의 고전위가 OP 앰프(OP2)의 고전위출력과 함께 트랜지스터(Q1)(Q2)를 턴온시킨후 릴레이코일(RL1)(RL2)을 다시 여자시켜 릴레이스위치(RS1)(RS2)를 온시킴으로써 서치기능이 다시 수행된다.Then, when the Tachiki (S 1 ) is turned on again, the charging power of the capacitor (C 2 ) is discharged through the diode (D 8 ) so that the power of the non-inverting (+) side of the OP amplifier (OP 3 ) is increased. The output side of (OP 3 ) becomes a high potential state, and its high potential turns on the transistors Q 1 and Q 2 together with the high potential output of the OP amplifier OP 2 and then relay coils RL 1 (RL). 2 ) The search function is performed again by exciting again by turning on the relay switch (RS 1 ) (RS 2 ).

또한 서치기능 차단용 타치키이(S2)를 온시키게되면, OP 앰프(OP1)의 반전(-)측 전원이 비반전(+)측보다 상승되어 저전위를 출력하며, 이때 OP 앰프(OP3)의 출력이 다이오드(D5)를 통해 인가되어 저전위로 됨에 따라 트랜지스터(Q1)(Q2)가 턴오프된후 릴레이코일(RL1)(RL2)의 여자가 해제되어 릴레이스위치(RS1)(RS2)가 오프됨으로써 서치가능이 차단된다.In addition, when the search function blocking tachykey (S 2 ) is turned on, the inverting (-) side power supply of the OP amplifier OP 1 is raised above the non-inverting (+) side to output a low potential. 3 ) As the output of the transistor 3 is applied through the diode D 5 to the low potential, the transistor Q 1 (Q 2 ) is turned off and then the excitation of the relay coil RL 1 (RL 2 ) is released, thereby relaying the relay switch ( Searchable is cut off by RS 1 ) (RS 2 ) being off.

따라서 서치동안에 워크코일(WC)에 적정부하가 인가되면, 입력전류감지부(3)를 통해 상승된 입력전류가 감지됨에 따라 OP 앰프(OP5)의 반전(-)측 전원이 비반전( +)측보다 상승되어 저전위를 출력하며, 이의 저전위가 서치발생부(7)의 기능을 차단함과 아울러 트랜지스터(Q4)를 턴오프시킴에 따라 워크코일(WC)에 정상적인 파우어가 곱됨으로서 쿡톱기능이 수행된다.Therefore, when a proper load is applied to the work coil WC during the search, the inverting (-) side power supply of the OP amplifier OP 5 is non-inverted (+) as the input current increased through the input current sensing unit 3 is sensed. As the lower potential rises above the output side, the low potential cuts off the function of the search generator 7 and turns off the transistor Q 4 so that the normal work force is multiplied by the work coil WC. The cooktop function is performed.

이상에서 상세히 설명한 바와같이 본 고안은 마이크로프로세서를 사용하지 않는 1개 또는 2개의 워크코일을 갖는 인덕션 쿡톱에서 서치시간에 대한 제어를 실현하여, 계속되는 서치기간 동안에 부주의로 인한 부하의 가열등을 제거하므로 안전성이 향상되며, 불필요한 파우어의 손실을 방지할 수 있는 효과가 있다.As described in detail above, the present invention realizes the control of the search time in an induction cooktop having one or two work coils without using a microprocessor, thereby eliminating inadvertent heating of the load during the subsequent search period. The safety is improved, and there is an effect to prevent the loss of unnecessary powder.

Claims (1)

정류기(BD2), 정전압트랜지스터(Q5)를 통해 각부에 전원(B+)을 공급하게한 전원공급부(1)와, 입력전류 감지부(3)의 출력이 서치신호발생부(7), 출력레벨조정부(2)를 제어하게한 용기감지부(4)와, 상기한 출력레벨조정부(2)에 의해 구동되게한 전압조정부(6), 부저 및 LED 구동부(8)와, 워크코일(WC)감지용 OP 앰프(OP3), 상기한 전압조정부(6)의 출력이 드라이브(9)를 제어한후 정류기(BD1)의 출력과함께 트랜지스터 (Q6)를 구동하여 워크코일(WC)을 제어하게한 쿡톱제어부(5)로 구성된 인덕션 쿡톱회로에 있어서, 전원(B+) 분배저항(R5-R8)으로 타치키이(S1)(S2)상태를 감지하게한 OP 앰프(OP1)의 출력이 OP 앰프(OP2), 다이오드(D3)를 통해 후단을 제어하게한 서치키이입력부(10)와, 상기한 서치키이입력부(10)의 출력이 각각의 다이오드(D10)(D11), 바이어스저항(R1-R4)을 통해 트랜지스터(Q1)(Q2)를 제어한후 병렬접속된 다이오드( D1)(D2), 릴레이코일(RL1)(RL2)을 통해 릴레이스위치(RS1)(RS2)를 제어하여, 상기한 정류기(BD1), 전압조정부(6)의 입력전원을 제어하게한 릴레이구동부(30)와, 상기한 전압조정부(6)의 입력전원이 저항(R11-R13), 다이오드(D9), 콘덴서(C2)를 통해 OP 앰프(OP3)의 반전(-)측에 인가된후 비반전(+)측의 기준전원(B+)과 비교되어, 다이오드(D4-D6), 콘덴서(C1)를 통해 상기한 OP 앰프(OP1)(OP2)의 출력을 제어함과 아울러 다이오드(D7)(D8)를 통해 상기한 타치키이(S1)(S2)를 제어하여 서치시간을 제어하게한 서치시간제어부(20)로 구성된 것을 특징으로 한 인덕션 쿡톱의 서치시간 제어회로.The power supply unit 1, which supplies power B + to each unit through the rectifier BD 2 and the constant voltage transistor Q 5 , and the output of the input current sensing unit 3 are search signal generator 7, and output. The container detecting unit 4 which controls the level adjusting unit 2, the voltage adjusting unit 6, the buzzer and the LED driving unit 8, which are driven by the output level adjusting unit 2, and the work coil WC. The sensing OP amplifier OP 3 and the output of the voltage adjusting unit 6 control the drive 9, and then drive the transistor Q 6 together with the output of the rectifier BD 1 to drive the work coil WC. In the induction cooktop circuit composed of the cooktop control unit 5 to control, the OP amplifier (OP 1 ) for detecting the Tachiki (S 1 ) (S 2 ) state by the power supply (B +) distribution resistor (R 5 -R 8 ) ) output OP amplifier (OP 2) of diodes (each diode output of the D 3) control to a search key input section 10 to the rear end through the said one search key input section 10 (D 10) ( D 11 ), bias resistor (R 1- After controlling the transistor (Q 1 ) (Q 2 ) through R 4 ) the relay switch (RS 1 ) (D 1 ) (D 2 ), through the relay coil (RL 1 ) (RL 2 ) connected in parallel RS 2 ) to control the input power of the rectifier BD 1 and the voltage adjusting unit 6, and the input power of the voltage adjusting unit 6 is a resistor (R 11 −). R 13 ), the diode D 9 and the capacitor C 2 are applied to the inverting (-) side of the OP amplifier OP 3 and then compared with the reference power supply (B +) on the non-inverting (+) side. (D 4 -D 6 ), the output of the above-described OP amplifier (OP 1 ) (OP 2 ) through the condenser (C 1 ) and the Tachiki (D 8 ) through the diode (D 7 ) (D 8 ) S 1 ) (S 2 ) A search time control circuit of an induction cooktop, characterized in that the search time control unit 20 is configured to control the search time.
KR2019880013673U 1988-08-22 1988-08-22 Search timing limitation circuit of induction cook top KR940000974Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880013673U KR940000974Y1 (en) 1988-08-22 1988-08-22 Search timing limitation circuit of induction cook top

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880013673U KR940000974Y1 (en) 1988-08-22 1988-08-22 Search timing limitation circuit of induction cook top

Publications (2)

Publication Number Publication Date
KR900006005U KR900006005U (en) 1990-03-09
KR940000974Y1 true KR940000974Y1 (en) 1994-02-25

Family

ID=19278614

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880013673U KR940000974Y1 (en) 1988-08-22 1988-08-22 Search timing limitation circuit of induction cook top

Country Status (1)

Country Link
KR (1) KR940000974Y1 (en)

Also Published As

Publication number Publication date
KR900006005U (en) 1990-03-09

Similar Documents

Publication Publication Date Title
KR970002289B1 (en) Control apparatus of fluorescent lamp
KR100210275B1 (en) Circuit for powering gas discharge lamp
US6650070B1 (en) Point of use lighting controller
KR940000974Y1 (en) Search timing limitation circuit of induction cook top
US5518396A (en) Self-powered flame monitoring apparatus
US4902936A (en) Light adjusting apparatus
JP2006156147A (en) Induction heating device
WO1987007996A1 (en) A ballast for systems having multiple high-intensity discharge lamps
US5045758A (en) Solid state regulated power supply for luminescent lamp
KR100219960B1 (en) Long light converting system
US20040130280A1 (en) Ventilator having an abnormal operation indication device
KR890001602Y1 (en) Control circuit of microwave oven
JPH09320770A (en) Lighting device
KR100274947B1 (en) A fade-out switching circuit and there method of ac. lamp
KR890007622Y1 (en) Arrangement for controlling induction motor
KR0116340Y1 (en) Induction range driver
KR900008571Y1 (en) Power control circuit for magnetic inductive cooker
KR0150539B1 (en) Inverter type lamp control circuit using pulse width modulation
KR940006486B1 (en) Electrotherapeutic apparatus
JPH08205399A (en) Ac adaptor
JPH0745379A (en) Discharge lamp lighting unit and illuminator using this
KR940005500Y1 (en) Switch of distant infrared rays sensor with adhered blackout prearrangement function
WO2004079906A2 (en) Variable frequency half bridge driver
JPH0151878B2 (en)
KR940001786B1 (en) Voltage control system

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
LAPS Lapse due to unpaid annual fee