CN207304968U - Electromagnetic heater and the control circuit for reducing its stand-by power consumption - Google Patents

Electromagnetic heater and the control circuit for reducing its stand-by power consumption Download PDF

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Publication number
CN207304968U
CN207304968U CN201721190020.5U CN201721190020U CN207304968U CN 207304968 U CN207304968 U CN 207304968U CN 201721190020 U CN201721190020 U CN 201721190020U CN 207304968 U CN207304968 U CN 207304968U
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unit
control
diode
rectification
control circuit
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CN201721190020.5U
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孟宪昕
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Abstract

A kind of control circuit the utility model discloses electromagnetic heater and for reducing its stand-by power consumption, wherein, control circuit includes:Controllable switch unit, is connected between the input terminal of filter unit and AC power;First rectification unit, input terminal are connected with the input terminal of filter unit, and output terminal is connected with surge detection unit and voltage detection unit respectively;Controllable switch control circuit, to control the on or off of controllable switch unit;Control unit, to export cut-off signals when receiving standby command to controllable switch control circuit, to control controllable switch unit to turn off, so that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detection unit power-off, so as to effectively reduce the stand-by power consumption of electromagnetic heater.

Description

Electromagnetic heater and the control circuit for reducing its stand-by power consumption
Technical field
Household electrical appliance technical field is the utility model is related to, it is more particularly to a kind of to be used to reduce the standby work(of electromagnetic heater The control circuit of consumption, a kind of electromagnetic heater.
Background technology
At present, the circuit diagram of electromagnetic heater exchange side is generally as shown in Figure 1.As shown in Figure 1, electromagnetic heating fills Put the EMC filter circuit in the standby state, being made of filter capacitor and inductance, surge detection circuit, zero cross detection circuit and Voltage detecting circuit is in power-up state, the power consumption of EMC filter circuit about 0.1~0.2W or so when standby, generally with filtering The capacitance of capacitance is related, and capacitance is bigger, and stand-by power consumption is more, surge detection circuit, zero cross detection circuit and voltage detecting circuit Stand-by power consumption about 0.1W or so.
And for needing the electromagnetic heater into European market, CE (Conformite Europeenne, Europe system One) certification has stand-by power consumption a tightened up requirement, current scheme there may be stand-by power consumption it is exceeded the problem of.
Utility model content
The utility model is intended to solve one of technical problem in above-mentioned technology at least to a certain extent.
For this reason, a purpose of the utility model is to propose a kind of control for being used to reduce electromagnetic heater stand-by power consumption Circuit processed, the circuit can control filter unit, rectifier bridge and the first rectification unit, surge when electromagnetic heater is standby Detection unit and voltage detection unit power-off, so as to effectively reduce the stand-by power consumption of electromagnetic heater.
Second purpose of the utility model is to propose a kind of electromagnetic heater.
To reach above-mentioned purpose, the utility model first aspect proposes a kind of for reducing the standby work(of electromagnetic heater The control circuit of consumption, the electromagnetic heater include filter unit, rectifier bridge, surge detection unit and voltage detection unit, The output terminal of the filter unit is connected with the rectifier bridge, and the control circuit includes:Controllable switch unit, it is described controllable to open Unit is closed to be connected between input terminal and the AC power of the filter unit;First rectification unit, first rectification unit Input terminal be connected with the input terminal of the filter unit, the output terminal of first rectification unit is detected with the surge respectively Unit is connected with the voltage detection unit;Controllable switch control circuit, the controllable switch control circuit controllable are opened with described Unit is closed to be connected to control the on or off of the controllable switch unit;Control unit, described control unit respectively with it is described Controllable switch control circuit, the surge detection unit are connected with the voltage detection unit, and described control unit is connecing Cut-off signals are exported when receiving standby command to the controllable switch control circuit, to control the controllable switch unit to turn off, So that the filter unit, the rectifier bridge and first rectification unit, the surge detection unit and voltage inspection Survey unit power-off.
The control circuit according to the present utility model for being used to reduce electromagnetic heater stand-by power consumption, can treat receiving Cut-off signals are exported when machine instructs to controllable switch control circuit, to control controllable switch unit to turn off, so that filter unit, whole Bridge and the first rectification unit, surge detection unit and voltage detection unit power-off are flowed, so as to reduce electromagnetic heater Stand-by power consumption.
In addition, according to the utility model control circuit for being used to reduce electromagnetic heater stand-by power consumption set forth above also There can be technical characteristic additional as follows:
Specifically, the controllable switch unit is relay unit, and the controllable switch control circuit controls for relay Circuit, wherein, the relay unit includes switch and coil, one end of the switch and one end phase of the AC power Even, the other end of a switch input with the input terminal and first rectification unit of the filter unit respectively End is connected, another input terminal of first rectification unit is connected to after being connected with another input terminal of the filter unit The other end of the AC power, one end of the coil are connected with one end of the control relay circuit, the coil The other end is connected with the other end of the control relay circuit, and whether the control relay circuit is by controlling the coil It is powered to control closure or the disconnection of the switch.
Specifically, the above-mentioned control circuit for being used to reduce electromagnetic heater stand-by power consumption further includes:Second rectification list Member, the input terminal of second rectification unit are connected with the AC power, and second rectification unit is to the exchange The alternating current that power supply provides carries out rectification, and output ripple direct current;Zero passage detection unit, one end of the zero passage detection unit It is connected with the output terminal of second rectification unit, the other end of the zero passage detection unit is connected with described control unit, institute State zero passage detection unit and export zero passage detection signal to described control unit by detecting the zero crossing of the Rectified alternating current, So that described control unit controls the controllable switch unit to turn in the zero crossing by the controllable switch control unit Or shut-off.
Further, second rectification unit includes:First diode and the second diode, first diode Anode is connected with one end of the AC power, and the anode of second diode is connected with the other end of the AC power, Output terminal as second rectification unit after the cathode of first diode is connected with the cathode of second diode.
Specifically, first rectification unit includes:3rd diode and the 4th diode, the sun of the 3rd diode Pole is connected with the other end of the switch, and the anode of the 4th diode is connected with the other end of the AC power, described Output terminal as first rectification unit after the cathode of 3rd diode is connected with the cathode of the 4th diode.
Specifically, the control relay circuit includes:First resistor, one end of the first resistor and the control are single Member is connected, and the first triode, the base stage of first triode is connected with the other end of the first resistor, the one or three pole The emitter ground connection of pipe;First capacitance, first capacitance connection is between the base stage of first triode and emitter;The Five diodes, the anode of the 5th diode respectively with the collector of first triode and one end phase of the coil Even, the cathode of the 5th diode is connected with the other end of the coil;Second resistance, one end of the second resistance and institute The cathode for stating the 5th diode is connected, and the other end of the second resistance is connected with default power supply.
To reach above-mentioned purpose, the utility model second aspect proposes a kind of electromagnetic heater, including this practicality is newly The control circuit for being used to reduce electromagnetic heater stand-by power consumption described in type embodiment first aspect.
The electromagnetic heater of the utility model, passes through the above-mentioned control for being used to reduce electromagnetic heater stand-by power consumption Circuit, cut-off signals can be exported when receiving standby command to controllable switch control circuit, to control controllable switch unit Shut-off, so that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detection unit power-off, so that Stand-by power consumption can effectively drop.
Brief description of the drawings
The above-mentioned and/or additional aspect of the utility model and advantage from the following description of the accompanying drawings of embodiments will Become obvious and be readily appreciated that, wherein,
Fig. 1 is the circuit diagram of electromagnetic heater exchange side in correlation technique;
Fig. 2 is the control circuit for being used to reduce electromagnetic heater stand-by power consumption according to the utility model one embodiment Block diagram;
Fig. 3 is the control electricity for being used to reduce electromagnetic heater stand-by power consumption according to another embodiment of the utility model The block diagram on road;
Fig. 4 is the circuit topology figure according to the control relay circuit of the utility model one embodiment;And
Fig. 5 is the control method according to the stand-by power consumption of the reduction electromagnetic heater of the utility model one embodiment Flow chart.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.
Below in conjunction with the accompanying drawings come describe the utility model embodiment be used for reduce the control of electromagnetic heater stand-by power consumption Circuit processed, electromagnetic heater and reduce electromagnetic heater stand-by power consumption control method.
Fig. 2 is the control circuit for being used to reduce electromagnetic heater stand-by power consumption according to the utility model one embodiment Block diagram.Wherein, as shown in Fig. 2, electromagnetic heater includes:Filter unit 10, rectifier bridge 20, surge detection unit 30 and voltage detection unit 40, the output terminal of filter unit 10 be connected with rectifier bridge 20;Control circuit includes:Controllable switch unit 50th, the first rectification unit 60, controllable switch control circuit 70 and control unit 80.
Wherein, controllable switch unit 50 is connected between the input terminal of filter unit 10 and AC power AC.First rectification The input terminal of unit 60 is connected with the input terminal of filter unit 10, and the output terminal of the first rectification unit 60 detects list with surge respectively Member 30 is connected with voltage detection unit 40.Controllable switch control circuit 70 is connected with controllable switch unit 50 to control controllable switch The on or off of unit 50.Control unit 80 is examined with controllable switch control circuit 70, surge detection unit 30 and voltage respectively Single 40 are surveyed to be connected, control unit 80 to export cut-off signals when receiving standby command to controllable switch control circuit 70, To control controllable switch unit 50 to turn off, so that filter unit 10,20 and first rectification unit 60 of rectifier bridge, surge detect Unit 30 and voltage detection unit 40 power off.
Specifically, filter unit 10 can be made of capacitance and inductance, and filter unit 10 can export AC power AC Alternating current be filtered processing, to remove the spike in waveform.First rectification unit 60 can be defeated to AC power AC The alternating current gone out carries out rectification, and with output ripple direct current, surge detection unit 30 can be defeated to the first rectification unit 60 in real time The Rectified alternating current gone out is detected and generates surging signal, to judge whether AC power AC surge voltage or surge electricity occurs Stream, voltage detection unit 40 in real time can be detected the Rectified alternating current of the first rectification unit 60 output and generate voltage letter Number, to judge whether AC power AC overvoltage occurs.Control unit 80 can be according to surging signal and voltage signal to electromagnetism Heating unit is controlled, such as when control unit 80 judges that surge voltage or surge occurs in AC power AC according to surging signal Electric current, then control electromagnetic heater triggering surge protection, and control unit 80 judges that AC power AC occurs according to voltage signal Overvoltage, then control electromagnetic heater triggering overvoltage protection.Also, control unit 80 can also be when receiving standby command Cut-off signals are exported to controllable switch control circuit 70, can be controlled with ON-OFF control circuit 70 when receiving cut-off signals controllable Switch element 50 turns off, so as to so that filter unit 10,20 and first rectification unit 60 of rectifier bridge, surge detection unit 30 Powered off with voltage detection unit 40, greatly reduce the stand-by power consumption of electromagnetic heater.
Further, in the embodiment of the utility model, as shown in figure 3, controllable switch unit 50 can be relay Unit, controllable switch control circuit 70 are control relay circuit, wherein, relay unit includes switch K and coil L, switchs K One end be connected with one end of AC power AC, switch the other end of K respectively with an input terminal of filter unit 10 and first One input terminal of rectification unit 60 is connected, another input terminal of the first rectification unit 60 and filter unit 10 another Input terminal is connected to the other end of AC power AC, one end of coil L and one end phase of control relay circuit 70 after being connected Even, the other end of coil L is connected with the other end of control relay circuit 70, and control relay circuit 70 passes through control coil L Whether it is powered with the closure of controlling switch K or disconnection.
Specifically, when coil L obtains electric, K closures, during coil L dead electricity, K is disconnected.Control unit 80 can by control can Whether control ON-OFF control circuit 70 turns on whether control coil L powers on, so that the closure of controlling switch K or disconnection.
One embodiment according to the present utility model, as shown in figure 3, the control for reducing electromagnetic heater stand-by power consumption Circuit processed can also include:Second rectification unit 90 and zero passage detection unit 100.
Wherein, the input terminal of the second rectification unit 90 connects with AC power phase AC, and the second rectification unit 90 is to exchange The alternating current that power supply AC is provided carries out rectification, and output ripple direct current.One end of zero passage detection unit 100 and the second rectification list The output terminal of member 90 is connected, and the other end of zero passage detection unit 100 is connected with control unit 80, and zero passage detection unit 100 passes through The zero crossing of Rectified alternating current is detected to export zero passage detection signal to control unit 80, so that control unit 80 is led in zero crossing Cross controllable switch control unit 70 and control 80 on or off of controllable switch unit.
Specifically, if the shrapnel at relay forceful electric power end is in the case where being not in sine-way zero, unexpected closure or Person disconnects, and has the harm such as sparking, arcing, there are some potential safety problems.Therefore, zero passage detection unit 100 can pass through inspection The zero crossing of Rectified alternating current is surveyed to export zero passage detection signal to control unit 80, when K needs on or off, control is single Member 80 can control K to turn on or turn off according to zero cross signal at zero crossing.Thus, relay unit can not only be improved Service life, can also improve the security of circuit.
Further, one embodiment according to the present utility model, as shown in figure 3, the second rectification unit 90 can include: First diode D1 and the second diode D2, the anode of the first diode D1 are connected with one end of AC power AC, the two or two pole The anode of pipe D2 is connected with the other end of AC power AC, the cathode phase of the cathode of the first diode D1 and the second diode D2 Output terminal after even as the second rectification unit 90.
As shown in figure 3, the first rectification unit 60 can include:3rd diode D3 and the 4th diode D4, the three or two pole The anode of pipe D3 is connected with switching the other end of K, and the anode of the 4th diode D4 is connected with the other end of AC power AC, and the 3rd Output terminal as the first rectification unit 60 after the cathode of diode D3 is connected with the cathode of the 4th diode D4.
Specifically, after the alternating current that AC power AC is exported can be carried out full-wave rectification by the first rectification unit 60, output Rectified alternating current is to surge detection unit 30 and voltage detection unit 40.Second rectification unit 90 can export AC power AC Alternating current carry out full-wave rectification after, output ripple direct current to zero passage detection unit 100.
In the utility model, as shown in figure 3, filter unit 10 another input terminal and AC power AC it is another Protective tube R is also provided between end, protective tube R can be fused in circuit overcurrent, be powered off with control circuit, improve safety Property.
One embodiment according to the present utility model, as shown in figure 4, control relay circuit, that is, controllable ON-OFF control circuit 70 can include:First resistor R1, the first triode Q1, the first capacitance C1, the 5th diode D5 and second resistance R2.
Wherein, one end of first resistor R1 is connected with control unit 80.The base stage of first triode Q1 and first resistor R1 The other end is connected, the emitter ground connection of the first triode Q1.First capacitance C1 is connected to base stage and the transmitting of the first triode Q1 Between pole.The anode of 5th diode D5 is connected with the collector of the first triode Q1 and one end of coil L respectively, the five or two pole The cathode of pipe D5 is connected with the other end of coil L.One end of second resistance R2 is connected with the cathode of the 5th diode D5, the second electricity The other end of resistance R2 is connected with default power supply VCC.Wherein, presetting the size of power supply VCC can be preset according to actual conditions.
Specifically, as shown in figure 4, first resistor R1 can play metering function, the 5th diode D5 is fly-wheel diode, can To play the role of suppressing absorbing inverse electromotive force.When needing to control K closures, control unit 80 can export high electricity by R1 Ordinary mail number is to the base stage of the first triode Q1, and when the base stage of Q1 is high level, Q1 conductings, coil L is powered on, K closures.Work as needs When controlling KD disconnections, control unit 80 can pass through R1 and export low level signal to the base stage of the first triode Q1, the base stage of Q1 For low level when, Q1 shut-off, coil L dead electricity, K disconnect.
It is appreciated that in the implementation of the utility model, electromagnetic heater can be electromagnetic oven.
In conclusion the control electricity for being used to reduce electromagnetic heater stand-by power consumption according to the utility model embodiment Road, the voltage signal pair for the AC power that the surging signal and voltage detection unit that can be detected according to surge detection unit detect Electromagnetic heater is controlled, and exports cut-off signals to controllable switch control circuit when receiving standby command, with control Controllable switch unit shut-off processed, so that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detecting Unit powers off, so as to effectively reduce the stand-by power consumption of electromagnetic heater.Also, control unit can be according to zero cross signal Controllable switch unit on or off is controlled at zero crossing, can not only improve the service life of relay unit, can be with Improve the security of circuit.
The utility model embodiment also proposes a kind of electromagnetic heater, it includes the above-mentioned electromagnetic heating that is used to reduce and fills Put the control circuit of stand-by power consumption.
The electromagnetic heater of the utility model embodiment, by above-mentioned for reducing electromagnetic heater stand-by power consumption Control circuit, can according to surge detection unit detect surging signal and voltage detection unit detect AC power electricity Pressure signal is controlled, and exports cut-off signals to controllable switch control circuit when receiving standby command, controllable to control Switch element turns off, so that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detection unit break Electricity, so as to effectively drop stand-by power consumption.
Based on above-mentioned electromagnetic heater, the embodiment of the utility model also proposes a kind of reduction electromagnetic heater The control method of stand-by power consumption.
Fig. 5 is the control method according to the stand-by power consumption of the reduction electromagnetic heater of the utility model one embodiment Flow chart.As shown in figure 5, the control method may comprise steps of:
S1, judges whether to receive standby command.
S2, if receiving the standby command, output cut-off signals are to controllable switch control circuit, to control controllable open Unit shut-off is closed, so that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detection unit break Electricity.
Specifically, cut-off signals are exported when receiving standby command to controllable switch control circuit, control can be switched Circuit controls controllable switch unit to turn off when receiving cut-off signals, so as to so that filter unit, rectifier bridge and first Rectification unit, surge detection unit and voltage detection unit power-off, greatly reduce the stand-by power consumption of electromagnetic heater.
One embodiment according to the present utility model, the control method of the stand-by power consumption of above-mentioned reduction electromagnetic heater It can also include:The zero crossing of AC power is detected, so as to the zero crossing control when receiving standby command according to AC power Controllable switch unit shut-off processed.
Specifically, if the shrapnel at relay forceful electric power end is in the case where being not in sine-way zero, unexpected closure or Person disconnects, and has the harm such as sparking, arcing, there are some potential safety problems.Therefore, can be exported by zero passage detection unit Zero-signal, when controllable switch unit needs on or off, can control controllable switch according to zero cross signal at zero crossing Unit turns on or shut-off.Thus, the service life of controllable switch unit can be not only improved, the safety of circuit can also be improved Property.
In the embodiment of the utility model, as shown in figure 3, controllable switch unit can be relay unit, it is controllable to open Pass control circuit is control relay circuit, wherein, relay unit includes switch and coil, one end of switch and AC power One end be connected, the other end of switch respectively with an input terminal of filter unit and an input terminal phase of the first rectification unit Even, another input terminal of the first rectification unit is connected to the another of AC power after being connected with another input terminal of filter unit One end, one end of coil are connected with one end of control relay circuit, the other end of coil and control relay circuit it is another End is connected, and whether control relay circuit is powered with the closure of controlling switch or disconnection by control coil.
Specifically, when coil obtains it is electric when, switch closure, during coil losing electricity, switches off.Can be by controlling controllable switch Whether control circuit turns on whether control coil powers on, so that the closure of controlling switch or disconnection.
It should be noted that the controlling party of the stand-by power consumption for reducing electromagnetic heater described in the utility model embodiment Method is based on the electromagnetic heater described in above-described embodiment, the details not disclosed in this present embodiment specifically be can refer to above-mentioned Embodiment, to reduce redundancy, details are not described herein again.
In conclusion according to the utility model embodiment reduction electromagnetic heater stand-by power consumption control method, Can be when receiving standby command, output cut-off signals to controllable switch control circuit, to control controllable switch unit to turn off, So that filter unit, rectifier bridge and the first rectification unit, surge detection unit and voltage detection unit power-off, so as to drop The stand-by power consumption of electromagnetic heater.And it is possible to controlled according to zero cross signal at zero crossing controllable switch unit turn on or Person turns off, and can not only improve the service life of controllable switch unit, can also improve the security of circuit.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model Limitation.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally;Can be Mechanically connect or be electrically connected;It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (7)

  1. A kind of 1. control circuit for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that the electromagnetic heater Including filter unit, rectifier bridge, surge detection unit and voltage detection unit, the output terminal of the filter unit and the rectification Bridge is connected, and the control circuit includes:
    Controllable switch unit, the controllable switch unit are connected between input terminal and the AC power of the filter unit;
    First rectification unit, the input terminal of first rectification unit are connected with the input terminal of the filter unit, and described first The output terminal of rectification unit is connected with the surge detection unit and the voltage detection unit respectively;
    Controllable switch control circuit, the controllable switch control circuit are connected described controllable to control with the controllable switch unit The on or off of switch element;
    Control unit, described control unit respectively with the controllable switch control circuit, the surge detection unit and the electricity Pressure detection unit is connected, and described control unit is exporting cut-off signals when receiving standby command to the controllable switch control Circuit processed, to control the controllable switch unit to turn off, so that the filter unit, the rectifier bridge and first rectification Unit, the surge detection unit and voltage detection unit power-off.
  2. 2. the control circuit as claimed in claim 1 for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that described Controllable switch unit is relay unit, and the controllable switch control circuit is control relay circuit, wherein, the relay Unit includes switch and coil, one end of the switch are connected with one end of the AC power, the other end point of the switch It is not connected with an input terminal of the filter unit and an input terminal of first rectification unit, the first rectification list Another input terminal of member is connected to the other end of the AC power after being connected with another input terminal of the filter unit, One end of the coil is connected with one end of the control relay circuit, and the other end of the coil is controlled with the relay The other end of circuit is connected, and whether the control relay circuit is by controlling the coil to be powered to control closing for the switch Close or disconnect.
  3. 3. the control circuit as claimed in claim 1 or 2 for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that Further include:
    Second rectification unit, the input terminal of second rectification unit are connected with the AC power, second rectification unit Alternating current to provide the AC power carries out rectification, and output ripple direct current;
    Zero passage detection unit, one end of the zero passage detection unit are connected with the output terminal of second rectification unit, the mistake The other end of zero detection unit is connected with described control unit, and the zero passage detection unit is by detecting the Rectified alternating current Zero crossing to export zero passage detection signal to described control unit, so as to described control unit the zero crossing by it is described can Control switch control unit and control the controllable switch unit on or off.
  4. 4. the control circuit as claimed in claim 3 for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that described Second rectification unit includes:First diode and the second diode, anode and the AC power of first diode One end is connected, and the anode of second diode is connected with the other end of the AC power, the cathode of first diode Output terminal after being connected with the cathode of second diode as second rectification unit.
  5. 5. the control circuit as claimed in claim 2 for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that described First rectification unit includes:3rd diode and the 4th diode, the anode of the 3rd diode are another with the switch End be connected, the anode of the 4th diode is connected with the other end of the AC power, the cathode of the 3rd diode and Output terminal as first rectification unit after the cathode of 4th diode is connected.
  6. 6. the control circuit as claimed in claim 2 for being used to reduce electromagnetic heater stand-by power consumption, it is characterised in that described Control relay circuit includes:
    First resistor, one end of the first resistor are connected with described control unit,
    First triode, the base stage of first triode are connected with the other end of the first resistor, first triode Emitter ground connection;
    First capacitance, first capacitance connection is between the base stage of first triode and emitter;
    5th diode, the anode of the 5th diode respectively with the collector of first triode and the coil one End is connected, and the cathode of the 5th diode is connected with the other end of the coil;
    Second resistance, one end of the second resistance are connected with the cathode of the 5th diode, the second resistance it is another End is connected with default power supply.
  7. A kind of 7. electromagnetic heater, it is characterised in that including as any one of claim 1-6 be used for reduce electromagnetism The control circuit of heating unit stand-by power consumption.
CN201721190020.5U 2017-09-14 2017-09-14 Electromagnetic heater and the control circuit for reducing its stand-by power consumption Active CN207304968U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201721190020.5U CN207304968U (en) 2017-09-14 2017-09-14 Electromagnetic heater and the control circuit for reducing its stand-by power consumption

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617470A (en) * 2018-11-07 2019-04-12 舒可士(深圳)科技有限公司 The control system of hair dryer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617470A (en) * 2018-11-07 2019-04-12 舒可士(深圳)科技有限公司 The control system of hair dryer

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