CN103700542B - Actuating of relay response and delay detection circuit, circuit board and there is its electric heating products - Google Patents
Actuating of relay response and delay detection circuit, circuit board and there is its electric heating products Download PDFInfo
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- CN103700542B CN103700542B CN201310700132.0A CN201310700132A CN103700542B CN 103700542 B CN103700542 B CN 103700542B CN 201310700132 A CN201310700132 A CN 201310700132A CN 103700542 B CN103700542 B CN 103700542B
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Abstract
The invention discloses a kind of actuating of relay response and delay detection circuit, circuit board and electric heating products thereof.Described actuating of relay response and delay detection circuit comprise: power supply; Zero passage detection loop, its input is connected to power supply, and its output is connected with the zero cross signal detection terminal ZERO of control chip; Relay, its one end is connected to power supply, and the other end is connected with the input of voltage detection circuit; Voltage detection circuit, its output is connected with the voltage detection signal input terminal AD-V of control chip; Load, its one end is connected to power supply, and the other end is connected to the input of voltage detection circuit.Adopt the present invention, on the one hand, its real-time waveform voltage detected is not equivalent voltage, on the other hand, the circuit structure of this circuit is simple, only with two electrical combination, just can realize the functions such as voltage detecting, zero passage detection, the detection of relay responsive state, actuating of relay delay detection.
Description
Technical field
The present invention relates to cooking apparatus technical field, in particular to a kind of actuating of relay response and delay detection circuit, circuit board and electric heating products thereof.
Background technology
Domestic electric heating product adopts heating wire to heat object usually, but presently, owing to being subject to the impact of change in voltage, the change of such as described voltage is from the power disturbance in electric power transfer process, adopt these domestic electric heating products of heating wire heating cannot accomplish that accurate power controls, current, in order to solve the problem of change in voltage, in industry, existing researcher proposes and first carries out step-down to input voltage, portion voltage signal is separated afterwards by bleeder circuit, again by performing voltage detecting after filter circuit, but this voltage detecting circuit is comparatively complicated, device needed for it is many, manufacturing cost can be caused to improve on the one hand, second the difficulty of board design is increased.
In addition, when household electrical appliances electric heating products will realize the functions such as voltage detecting, zero passage detection, the detection of relay responsive state, actuating of relay delay detection simultaneously, its realizing circuit is complicated, and the during the design time is longer, and causing easily affects the promptness of product design and the reliability of product.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of actuating of relay response and delay detection circuit, circuit board and electric heating products thereof.
The present invention realizes by the following technical solutions:
A kind of actuating of relay response and delay detection circuit, it comprises:
Power supply;
Zero passage detection loop, its input is connected to power supply, and its output is connected with the zero cross signal detection terminal ZERO of control chip;
Relay, its one end is connected to power supply, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit, its output is connected with the voltage detection signal input terminal AD-V of control chip;
Load, its one end is connected to power supply, and the other end is connected to the input of voltage detection circuit.
Preferably, described voltage detecting circuit, comprise diode D3, resistance R1, resistance R2, parallel with one another and one holds the electric capacity C1 of ground connection jointly, resistance R3, diode D4 and the series connection group be made up of resistance R4 and electric capacity C2, and its negative electrode is connected to high level and the diode D5 that is connected with the negative electrode of described diode D4 of its anode, wherein, the anode of diode D3 is connected to relay, its negative electrode is connected with resistance R1, the other end of resistance R1 is connected with resistance R2, another of the other end of resistance R2 and described parallel circuits is jointly held and is connected, the described anode of diode D3 is connected with the output of relay circuit, the plus earth of described diode D4, one end be connected of described resistance R4 and electric capacity C2 is connected to the voltage detection signal input terminal AD-V of control chip.
Preferably, described actuating of relay response and delay detection circuit also comprise the relay circuit be connected with described relay, described relay circuit comprises the diode D1 that its negative electrode is connected to the collector electrode of triode Q2 and the first electromagnetism end of relay K 1 respectively, the anode of diode D1 is connected with the anode of diode D2, the negative electrode of diode D2 is connected with the second electromagnetism end of relay K 1 and the collector electrode of triode Q1 respectively, the base stage of triode Q1 is connected with signal terminal HBOT and passes through resistance R5 ground connection, in the grounded emitter of described triode Q1, the emitter of triode Q2 connects high level and is connected to one end of resistance R7, its base stage is connected to the other end of resistance R7 and is connected with the collector electrode of triode Q3, the grounded emitter of triode Q3, its base stage is also connected with signal terminal PULSE by electric capacity C3 by resistance R6 ground connection.
Preferably, described zero cross detection circuit, comprise resistance R8-R12, diode D6 and D7, electric capacity C4 and C5, and triode Q4, one end of described resistance R8 is electrically connected with city, its other end is connected to the base stage of described triode Q4, described diode D6 is in parallel with resistance R9, and the negative electrode of described diode D6 is connected to high level, its anode is connected to the base stage of described triode Q4 and one end of described electric capacity C4, the other end ground connection of electric capacity C4 jointly holding with one of resistance R11 parallel with one another and electric capacity C5 is connected, the emitter of described triode Q4 connects high level, its collector electrode is connected with the other end of described resistance R11 by resistance R10, the other end of described resistance R11 is also connected to high level by described diode D7, the negative electrode of described diode D7 connects high level, the other end of described electric capacity C5 is connected with resistance R12 and zero cross signal detection terminal ZERO connects, the other end of described resistance R12 is connected to the anode of diode D7.
A kind of circuit board, it comprises:
Voltage protection circuit;
Interchange turns direct current AC/DC circuit;
DC-DC DC/DC circuit;
And, actuating of relay response described above and delay detection circuit, described circuit comprises:
Power supply;
Zero passage detection loop, its input is connected to power supply, and its output is connected with the zero cross signal detection terminal ZERO of control chip;
Relay, its one end is connected to power supply, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit, its output is connected with the voltage detection signal input terminal AD-V of control chip;
Load, its one end is connected to power supply, and the other end is connected to the input of voltage detection circuit.
A kind of electric heating products, it comprises circuit board as above, and described circuit board comprises:
Voltage protection circuit;
Interchange turns direct current AC/DC circuit;
DC-DC DC/DC circuit;
And, actuating of relay response described above and delay detection circuit, described circuit comprises:
Power supply;
Zero passage detection loop, its input is connected to power supply, and its output is connected with the zero cross signal detection terminal ZERO of control chip;
Relay, its one end is connected to power supply, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit, its output is connected with the voltage detection signal input terminal AD-V of control chip;
Load, its one end is connected to power supply, and the other end is connected to the input of voltage detection circuit.
Adopt actuating of relay response provided by the invention and delay detection circuit, which simplify voltage detecting circuit, and be combined with zero crossing circuitry.By adopting zero passage and voltage detecting two modes combined, and pass through software control, realize the detection of sine voltage, on the one hand, its real-time waveform voltage detected is not equivalent voltage, and on the other hand, the circuit structure of this circuit is simple, only with two electrical combination, the functions such as voltage detecting, zero passage detection, the detection of relay responsive state, actuating of relay delay detection just can be realized.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of a kind of actuating of relay response of providing of the embodiment of the present invention and delay detection circuit.
Fig. 2 is the circuit diagram of the voltage detection circuit that provides of the embodiment of the present invention and relay circuit.
Fig. 3 is the circuit diagram of the zero cross detection circuit that the embodiment of the present invention provides.
The realization of the object of the invention, functional characteristics and excellent effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of actuating of relay response that the embodiment of the present invention provides and delay detection circuit, it comprises:
Power supply 30;
Zero passage detection loop 50, its input is connected to power supply 30, and its output is connected with the zero cross signal detection terminal ZERO of control chip 40;
Relay 70, its one end is connected to power supply 30, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit 20, its output is connected with the voltage detection signal input terminal AD-V of control chip 40;
Load 60, its one end is connected to power supply 30, and the other end is connected to the input of voltage detection circuit 20.
As shown in Figure 2, described power supply 30 can be civil power, and described load can be heater, and one end of described heater is connected to civil power live wire ACL, its other end is connected to civil power zero line ACN by relay circuit 10.
Described voltage detecting circuit 20, comprise diode D3, resistance R1, resistance R2, parallel with one another and one holds the electric capacity C1 of ground connection jointly, resistance R3, diode D4 and the series connection group be made up of resistance R4 and electric capacity C2, and its negative electrode is connected to high level and the diode D5 that is connected with the negative electrode of described diode D4 of its anode, wherein, the anode of diode D3 is connected to relay 70, its negative electrode is connected with resistance R1, the other end of resistance R1 is connected with resistance R2, another of the other end of resistance R2 and described parallel circuits is jointly held and is connected, the anode of described diode D3 is connected with the output of relay circuit 10, the plus earth of described diode D4, one end be connected of described resistance R4 and electric capacity C2 is connected to the voltage detection signal input terminal AD-V of control chip 40.
Described actuating of relay response and delay detection circuit also comprise the relay circuit 10 be connected with relay 70, particularly, shown in figure 2, one end of described relay K 1 is connected to civil power zero line CAN, its other end is connected to the input of voltage detection circuit 20, described relay circuit 10 comprises the diode D1 that its negative electrode is connected to the collector electrode of triode Q2 and the first electromagnetism end of relay K 1 respectively, the anode of diode D1 is connected with the anode of diode D2, the negative electrode of diode D2 is connected with the second electromagnetism end of relay K 1 and the collector electrode of triode Q1 respectively, the base stage of triode Q1 is connected with signal terminal HBOT and passes through resistance R5 ground connection, the grounded emitter of described triode Q1, the emitter of triode Q2 connects high level and is connected to one end of resistance R7, its base stage is connected to the other end of resistance R7 and is connected with the collector electrode of triode Q3, the grounded emitter of triode Q3, its base stage is also connected with signal terminal PULSE by electric capacity C3 by resistance R6 ground connection.
Described in reference diagram 3, described zero cross detection circuit, comprise resistance R8-R12, diode D6 and D7, electric capacity C4 and C5, and triode Q4, one end of described resistance R8 is electrically connected with city, its other end is connected to the base stage of described triode Q4, described diode D6 is in parallel with resistance R9, and the negative electrode of described diode D6 is connected to high level, its anode is connected to the base stage of described triode Q4 and one end of described electric capacity C4, the other end ground connection of electric capacity C4 jointly holding with one of resistance R11 parallel with one another and electric capacity C5 is connected, the emitter of described triode Q4 connects high level, its collector electrode is connected with the other end of described resistance R11 by resistance R10, the other end of described resistance R11 is also connected to high level by described diode D7, the negative electrode of described diode D7 connects high level, the other end of described electric capacity C5 is connected with resistance R12 and zero cross signal detection terminal ZERO connects, the other end of described resistance R12 is connected to the anode of diode D7.
The following describes the operation principle of actuating of relay response that lower the present embodiment provides and delay detection circuit.
1, zero cross detection circuit detecting zero crossing, and detect mains frequency f.
2, inhibit signal t time of delay is confirmed after measuring mains frequency f.
3, after zero crossing time of delay t, start when the non-adhesive of relay K 1 voltage detecting starting AD-V port
4, average after examining n time ADv.
5, according to the size of ADv, and frequency f, then from the form preset, calculate current voltage.
6, the frequency of voltage detecting can be real-time detection, also can detect once every a period of time, so far complete voltage detecting.
When 7, needing to open relay K 1, the action that front action is several times used for detecting relay K 1 postpones.
8, relay K 1 adhesive request is had, detect zero cross signal simultaneously, relay circuit 10 outputs signal, control relay K1 adhesive, simultaneously, voltage detecting circuit 20 starts every 1ms(or 500us) detect voltage AD value, continuous detection 10 times, can detect the moment that voltage can't check suddenly, calculates and sends the time difference of control signal to loss of voltage from relay circuit 10, be the adhesive time of delay of relay K 1, be defined as t1.
9, according to the frequency f detected before, if 50Hz, the theoretical control lag of action of relay K 1 is 10ms-t1; If 60Hz, the theoretical control lag of action of relay K 1 is 8.3ms-t1.
10, in like manner, when detecting relay switch K relieving delay, the control signal that relay circuit 10 exports disconnected at zero point, simultaneously, voltage detecting circuit 20 starts every 1ms(or 500us) detect voltage AD value, detect 10 times continuously, the moment that voltage detects suddenly can be detected.This is relay K 1 hang-over delay, is defined as t2.
11, control time when relay K 1 discharges in like manner is calculated.If 50Hz, the theoretical control lag of action of relay K 1 is 10ms-t2; If 60Hz, the theoretical control lag of action of relay is 8.3ms-t2.
12, relay K 1 action postpones, and detects once during each initialization, or operation 1000 times (recommendation) of cooking detects once.
13. for ensureing the effect of zero passage break-make, that is, action completed before zero crossing, the adhesive that previous calculations goes out and release time, needs 1ms slightly in advance
14, the 3rd effect of this circuit, be the action situation whether fault detecting relay K 1, based on relay K 1 adhesive and release, can corresponding relation be found at voltage detecting circuit 20, namely when relay K 1 discharges, can voltage be detected, can't check voltage during relay K 1 adhesive, therefore, can judge that relay K 1 performs whether consistent with control signal, send pickup signal if there is relay K 1, but still can detect voltage, namely illustrate that relay K 1 cannot adhesive; Or relay K 1 sends release signal, but still can't check voltage, illustrate that relay K 1 cannot discharge.Need to send information warning, or do relay K 1 action reparation.
It should be noted that time of delay, t was to catch sinusoidal wave crest or the position close to crest after zero crossing.
The embodiment of the present invention additionally provides a kind of circuit board, and it comprises:
Voltage protection circuit;
Interchange turns direct current AC/DC circuit;
DC-DC DC/DC circuit;
And, actuating of relay response described above and delay detection circuit, with reference to figure 1, described circuit comprises:
Power supply 30;
Zero passage detection loop 50, its input is connected to power supply 30, and its output is connected with the zero cross signal detection terminal ZERO of control chip 40;
Relay 70, its one end is connected to power supply 30, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit 20, its output is connected with the voltage detection signal input terminal AD-V of control chip 40;
Load 60, its one end is connected to power supply 30, and the other end is connected to the input of voltage detection circuit 20.
Shown in figure 2, described voltage detecting circuit 20, comprise diode D3, resistance R1, resistance R2, parallel with one another and one holds the electric capacity C1 of ground connection jointly, resistance R3, diode D4 and the series connection group be made up of resistance R4 and electric capacity C2, and its negative electrode is connected to high level and the diode D5 that is connected with the negative electrode of described diode D4 of its anode, wherein, the anode of diode D3 is connected to relay 70, its negative electrode is connected with resistance R1, the other end of resistance R1 is connected with resistance R2, another of the other end of resistance R2 and described parallel circuits is jointly held and is connected, the anode of described diode D3 is connected with the output of relay circuit 10, the plus earth of described diode D4, one end be connected of described resistance R4 and electric capacity C2 is connected to the voltage detection signal input terminal AD-V of control chip 40.
Described actuating of relay response and delay detection circuit also comprise the relay circuit 10 be connected with relay 70, particularly, shown in figure 2, one end of described relay K 1 is connected to civil power zero line CAN, its other end is connected to the input of voltage detection circuit 20, described relay circuit 10 comprises the diode D1 that its negative electrode is connected to the collector electrode of triode Q2 and the first electromagnetism end of relay K 1 respectively, the anode of diode D1 is connected with the anode of diode D2, the negative electrode of diode D2 is connected with the second electromagnetism end of relay K 1 and the collector electrode of triode Q1 respectively, the base stage of triode Q1 is connected with signal terminal HBOT and passes through resistance R5 ground connection, in the grounded emitter of described triode Q1, the emitter of triode Q2 connects high level and is connected to one end of resistance R7, its base stage is connected to the other end of resistance R7 and is connected with the collector electrode of triode Q3, the grounded emitter of triode Q3, its base stage is also connected with signal terminal PULSE by electric capacity C3 by resistance R6 ground connection.
More specifically, with reference to figure 3, described zero cross detection circuit, comprise resistance R8-R12, diode D6 and D7, electric capacity C4 and C5, and triode Q4, one end of described resistance R8 is electrically connected with city, its other end is connected to the base stage of described triode Q4, described diode D6 is in parallel with resistance R9, and the negative electrode of described diode D6 is connected to high level, its anode is connected to the base stage of described triode Q4 and one end of described electric capacity C4, the other end ground connection of electric capacity C4 jointly holding with one of resistance R11 parallel with one another and electric capacity C5 is connected, the emitter of described triode Q4 connects high level, its collector electrode is connected with the other end of described resistance R11 by resistance R10, the other end of described resistance R11 is also connected to high level by described diode D7, the negative electrode of described diode D7 connects high level, the other end of described electric capacity C5 is connected with resistance R12 and zero cross signal detection terminal ZERO connects, the other end of described resistance R12 is connected to the anode of diode D7.
The embodiment of the present invention additionally provides a kind of electric heating products, and it comprises circuit board as above, and described circuit board comprises:
Voltage protection circuit;
Interchange turns direct current AC/DC circuit;
DC-DC DC/DC circuit;
And, actuating of relay response described above and delay detection circuit, with reference to figure 1, described circuit comprises:
Power supply 30;
Zero passage detection loop 50, its input is connected to power supply 30, and its output is connected with the zero cross signal detection terminal ZERO of control chip 40;
Relay 70, its one end is connected to power supply 30, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit 20, its output is connected with the voltage detection signal input terminal AD-V of control chip 40;
Load 60, its one end is connected to power supply 30, and the other end is connected to the input of voltage detection circuit 20.
Continue with reference to figure 2, described voltage detecting circuit 20, comprise diode D3, resistance R1, resistance R2, parallel with one another and one holds the electric capacity C1 of ground connection jointly, resistance R3, diode D4 and the series connection group be made up of resistance R4 and electric capacity C2, and its negative electrode is connected to high level and the diode D5 that is connected with the negative electrode of described diode D4 of its anode, wherein, the anode of diode D3 is connected to relay 70, its negative electrode is connected with resistance R1, the other end of resistance R1 is connected with resistance R2, another of the other end of resistance R2 and described parallel circuits is jointly held and is connected, the anode of described diode D3 is connected with the output of relay circuit 10, the plus earth of described diode D4, one end be connected of described resistance R4 and electric capacity C2 is connected to the voltage detection signal input terminal AD-V of control chip 40.
Continue with reference to figure 2, describedly be connected to relay 70(K1 as illustrated in the drawing) relay circuit 10, comprise the diode D1 that its negative electrode is connected to the collector electrode of triode Q2 and the first electromagnetism end of relay K 1 respectively, the anode of diode D1 is connected with the anode of diode D2, the negative electrode of diode D2 is connected with the second electromagnetism end of relay K 1 and the collector electrode of triode Q1 respectively, the base stage of triode Q1 is connected with signal terminal HBOT and passes through resistance R5 ground connection, in the grounded emitter of described triode Q1, the emitter of triode Q2 connects high level and is connected to one end of resistance R7, its base stage is connected to the other end of resistance R7 and is connected with the collector electrode of triode Q3, the grounded emitter of triode Q3, its base stage is also connected with signal terminal PULSE by electric capacity C3 by resistance R6 ground connection.
Continue with reference to figure 3, described zero cross detection circuit, comprise resistance R8-R12, diode D6 and D7, electric capacity C4 and C5, and triode Q4, one end of described resistance R8 is electrically connected with city, its other end is connected to the base stage of described triode Q4, described diode D6 is in parallel with resistance R9, and the negative electrode of described diode D6 is connected to high level, its anode is connected to the base stage of described triode Q4 and one end of described electric capacity C4, the other end ground connection of electric capacity C4 jointly holding with one of resistance R11 parallel with one another and electric capacity C5 is connected, the emitter of described triode Q4 connects high level, its collector electrode is connected with the other end of described resistance R11 by resistance R10, the other end of described resistance R11 is also connected to high level by described diode D7, the negative electrode of described diode D7 connects high level, the other end of described electric capacity C5 is connected with resistance R12 and zero cross signal detection terminal ZERO connects, the other end of described resistance R12 is connected to the anode of diode D7.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. actuating of relay response and a delay detection circuit, is characterized in that, comprising:
Power supply;
Zero passage detection loop, its input is connected to power supply, and its output is connected with the zero cross signal detection terminal ZERO of control chip;
Relay, its one end is connected to power supply, and the other end is connected with the input of voltage detection circuit;
Voltage detection circuit, its output is connected with the voltage detection signal input terminal AD-V of control chip;
Load, its one end is connected to power supply, and the other end is connected to the input of voltage detection circuit;
Wherein, described load is heater;
Described voltage detecting circuit, comprise diode D3, resistance R1, resistance R2, parallel with one another and one holds the electric capacity C1 of ground connection jointly, resistance R3, diode D4 and the series connection group be made up of resistance R4 and electric capacity C2, and its negative electrode is connected to high level and the diode D5 that is connected with the negative electrode of described diode D4 of its anode, wherein, the anode of diode D3 is connected to relay, its negative electrode is connected with resistance R1, the other end of resistance R1 is connected with resistance R2, another of the other end of resistance R2 and described parallel circuits is jointly held and is connected, the described anode of diode D3 is connected with the output of relay circuit, the plus earth of described diode D4, one end be connected of described resistance R4 and electric capacity C2 is connected to the voltage detection signal input terminal AD-V of control chip.
2. actuating of relay response as claimed in claim 1 and delay detection circuit, it is characterized in that, also comprise the relay circuit be connected with described relay, described relay circuit comprises the diode D1 that its negative electrode is connected to the collector electrode of triode Q2 and the first electromagnetism end of relay K 1 respectively, the anode of diode D1 is connected with the anode of diode D2, the negative electrode of diode D2 is connected with the second electromagnetism end of relay K 1 and the collector electrode of triode Q1 respectively, the base stage of triode Q1 is connected with signal terminal HBOT and passes through resistance R5 ground connection, in the grounded emitter of described triode Q1, the emitter of triode Q2 connects high level and is connected to one end of resistance R7, its base stage is connected to the other end of resistance R7 and is connected with the collector electrode of triode Q3, the grounded emitter of triode Q3, its base stage is also connected with signal terminal PULSE by electric capacity C3 by resistance R6 ground connection.
3. actuating of relay response as claimed in claim 1 and delay detection circuit, it is characterized in that, described zero cross detection circuit, comprise resistance R8-R12, diode D6 and D7, electric capacity C4 and C5, and triode Q4, one end of described resistance R8 is electrically connected with city, its other end is connected to the base stage of described triode Q4, described diode D6 is in parallel with resistance R9, and the negative electrode of described diode D6 is connected to high level, its anode is connected to the base stage of described triode Q4 and one end of described electric capacity C4, the other end ground connection of electric capacity C4 jointly holding with one of resistance R11 parallel with one another and electric capacity C5 is connected, the emitter of described triode Q4 connects high level, its collector electrode is connected with the other end of described resistance R11 by resistance R10, the other end of described resistance R11 is also connected to high level by described diode D7, the negative electrode of described diode D7 connects high level, the other end of described electric capacity C5 is connected with resistance R12 and zero cross signal detection terminal ZERO connects, the other end of described resistance R12 is connected to the anode of diode D7.
4. a circuit board, is characterized in that, comprising:
Voltage protection circuit;
Interchange turns direct current AC/DC circuit;
DC-DC DC/DC circuit;
And, the actuating of relay response as described in claim 1-3 any one and delay detection circuit.
5. an electric heating products, is characterized in that, comprises circuit board as claimed in claim 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310700132.0A CN103700542B (en) | 2013-12-18 | 2013-12-18 | Actuating of relay response and delay detection circuit, circuit board and there is its electric heating products |
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| CN201310700132.0A CN103700542B (en) | 2013-12-18 | 2013-12-18 | Actuating of relay response and delay detection circuit, circuit board and there is its electric heating products |
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| US9680319B2 (en) * | 2014-06-27 | 2017-06-13 | Ergotron, Inc. | Electrical system for universal charging station |
| CN104898405B (en) * | 2015-05-22 | 2017-11-07 | 江苏固德威电源科技股份有限公司 | A kind of relay closing moment detection method |
| CN105242728A (en) * | 2015-10-28 | 2016-01-13 | 小米科技有限责任公司 | Method and device controlling power on/off of intelligent socket, and the intelligent socket |
| CN108448532A (en) * | 2018-04-24 | 2018-08-24 | 广东华美骏达电器有限公司 | A kind of relay zero-crossing control circuit |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
| CN109743048B (en) * | 2018-12-27 | 2023-10-27 | 通力科技股份有限公司 | Relay zero crossing trigger circuit, method and device |
| CN110459433B (en) * | 2019-08-27 | 2022-11-01 | 九阳股份有限公司 | Relay zero-crossing control method and cooking appliance |
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| JPH08171842A (en) * | 1994-12-16 | 1996-07-02 | Funai Techno Syst Kk | Relay controlling circuit |
| CN2872566Y (en) * | 2006-01-18 | 2007-02-21 | 百利通电子(上海)有限公司 | Overzero switch controlling circuit |
| CN101908439A (en) * | 2010-07-09 | 2010-12-08 | 北海市深蓝科技发展有限责任公司 | Self-adaptive electromagnetic relay zero-crossing on and off control method |
| CN103186150A (en) * | 2011-12-30 | 2013-07-03 | 北大方正集团有限公司 | Alternating current heater control device and method |
| CN203707029U (en) * | 2013-12-18 | 2014-07-09 | 美的集团股份有限公司 | Relay action response and delay detection circuit, circuit board and electrothermal product comprising same |
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|---|---|
| CN103700542A (en) | 2014-04-02 |
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