CN210222536U - Power supply control circuit, control circuit and electromagnetic cooking utensil - Google Patents
Power supply control circuit, control circuit and electromagnetic cooking utensil Download PDFInfo
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- CN210222536U CN210222536U CN201921442931.1U CN201921442931U CN210222536U CN 210222536 U CN210222536 U CN 210222536U CN 201921442931 U CN201921442931 U CN 201921442931U CN 210222536 U CN210222536 U CN 210222536U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a power control circuit, control circuit and electromagnetic cooking utensil, first switch is established ties in the power supply loop of alternating current source to major loop circuit, first MCU is connected to the control end of first switch, break off when the standby through first MCU control first switch, with the power supply of disconnection to the major loop, because major loop consumes most consumption when electromagnetic cooking utensil standby, thereby make electromagnetic cooking utensil's stand-by power consumption greatly reduced, the standby requirement of low-power consumption has been satisfied.
Description
Technical Field
The utility model relates to a domestic appliance field, concretely relates to power control circuit, control circuit and electromagnetism cooking utensil.
Background
At present, due to the global requirement for energy saving, higher and higher requirements are required for the standby power consumption of household electrical appliances, for electromagnetic cooking appliances, the standby power consumption is not negligible, and when the electromagnetic cooking appliances are in standby, the standby power consumption is higher and the requirement of low power consumption is not met because circuits such as a main loop and the like are still in a power-on state and still consume electric energy.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough or defect among the prior art, the utility model provides a power control circuit, control circuit and electromagnetism cooking utensil to solve the too high problem that can't satisfy the low-power consumption requirement of electromagnetism cooking utensil stand-by power consumption among the prior art.
In order to achieve the above object, an aspect of the present invention provides a power control circuit for an electromagnetic cooking appliance, the power control circuit including:
a main loop circuit;
the first switch is connected in series in a power supply loop of the alternating current power supply to the main loop circuit;
the control end of the first switch is connected with the first MCU, and the first MCU controls the first switch to be disconnected when the electromagnetic cooking appliance is in standby so as to disconnect the power supply of the alternating current power supply to the main loop.
Preferably, the power supply control circuit further includes:
the input end of the first rectifying circuit is connected with an alternating current power supply through a first switch;
the input end of the surge detection circuit is connected with the output end of the first rectifying circuit, and the output end of the surge detection circuit is connected with the first MCU;
a voltage detection circuit; the input end of the voltage detection circuit is connected with the output end of the first rectification circuit, and the output end of the voltage detection circuit is connected with the first MCU;
when the first switch is turned off, the power supply of the alternating current power supply to the surge detection circuit and the voltage detection circuit is simultaneously turned off.
Preferably, the power supply control circuit further includes:
the input end of the second rectifying circuit is connected with an alternating current power supply;
and the output end of the second rectifying circuit is connected with the input end of the zero-crossing detection circuit, the output end of the zero-crossing detection circuit is connected with the first MCU, and the first MCU controls the on-off of the first switch according to a zero-crossing signal output by the zero-crossing detection circuit.
The utility model discloses another aspect provides a control circuit for electromagnetic cooking utensil, electromagnetic cooking utensil control circuit includes:
the main control board comprises the power supply control circuit for the electromagnetic cooking appliance;
and the display panel comprises a second MCU, and the second MCU is communicated with the first MCU through a connecting wire.
Preferably, the main control board further includes:
a switching tube driving circuit;
the input end of the power supply module is connected with an alternating current power supply;
and the first output end of the power supply module is connected with the switching tube driving circuit through the second switch, the control end of the second switch is connected with the second MCU, and the second MCU controls the second switch to be disconnected when the electromagnetic cooking appliance is in standby so as to disconnect the power supply of the power supply module to the switching tube driving circuit.
Preferably, the first output end of the power supply module is further connected with the first MCU through the second switch to supply power to the first MCU, and the second output end of the power supply module is connected with the second MCU to supply power to the second MCU.
Preferably, the power supply module includes:
a first rectifying and filtering circuit;
the output end of the switching power supply chip is connected with the input end of the first rectifying and filtering circuit;
the output end of the first rectifying and filtering circuit and one end of the primary side of the switching transformer are connected to the first output end of the power supply module in common;
and the input end of the second rectifying and filtering circuit is connected with the secondary side of the switch transformer, and the output end of the second rectifying and filtering circuit is the second output end of the power module.
Preferably, the main control board further comprises an isolation circuit, and the isolation circuit is connected in series with the communication lines of the first MCU and the second MCU.
Preferably, the isolation circuit comprises:
a first isolation unit and a second isolation unit;
the communication line comprises a first communication line and a second communication line, and the first isolation unit and the second isolation unit are respectively connected in series with the first communication line and the second communication line.
Preferably, the first switch comprises a first relay;
the two ends of the switch of the first relay are output ends of the first switch, and the control end of the first relay is a control end of the first switch.
Preferably, the second switch comprises a first optocoupler;
the two ends of the triode of the first optocoupler are output ends of the second switch, the cathode of the light emitting diode of the first optocoupler is grounded, and the anode of the light emitting diode of the first optocoupler is connected with the second MCU through a connecting wire.
Still another aspect of the present invention provides an electromagnetic cooking device, which includes the above-mentioned control circuit for an electromagnetic cooking device.
Through the technical scheme, the utility model discloses a power control circuit for electromagnetic cooking utensil breaks off through first MCU control first switch when the standby to the power supply of disconnection to the major loop, because the major loop consumes most consumptions when electromagnetic cooking utensil standby, thereby makes electromagnetic cooking utensil's stand-by power consumption greatly reduced, has satisfied the standby requirement of low-power consumption.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a simplified circuit schematic diagram of the electromagnetic cooking device of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
The present invention firstly proposes a power control circuit for an electromagnetic cooking appliance, in a first embodiment, as shown in fig. 1, the voltage control circuit comprises a main loop circuit 10, a first switch 40 and a first MCU 30;
the first switch 40 is connected in series in a power supply loop of the main loop circuit 10 from the ac power supply, a control end of the first switch 40 is connected to the first MCU30, and the first MCU30 controls the first switch 40 to be turned off when the electromagnetic cooking appliance is in a standby state, so as to cut off the power supply from the ac power supply to the main loop circuit 10.
The main circuit 10 is a circuit related to a power control part of an electromagnetic cooking appliance, and particularly relates to a circuit related to a high-power switch tube such as an Insulated Gate Bipolar Transistor (IGBT), so as to drive a coil panel to generate an alternating electromagnetic field, thereby generating eddy current at the bottom of a pot to heat the pot. Specifically, the main circuit 10 includes an EMC filter circuit 11, a bridge 12 and a resonant circuit 13 as shown in fig. 1, wherein an input terminal of the EMC filter circuit 11 is connected to an ac power source through a first switch 40, an output terminal thereof is connected to an input terminal of the bridge 12, an output terminal of the bridge 12 is connected to the resonant circuit 13, so that the ac power source is filtered to remove interference signals, and is rectified to a high voltage dc circuit of about 300V through the bridge 12 to supply power for the operation of the resonant circuit 13 including the power switch tube, and the power switch tube is driven by the switch tube driving circuit 20 to perform high speed switching, so as to generate electromagnetic induction on the coil disc to form an alternating magnetic field.
The main circuit 10 consumes most of the power consumption of the electromagnetic cooking device during operation, and the standby power consumption is not negligible even if the electromagnetic cooking device is still in the power-on state during standby, and is generally larger than 1W.
The first switch 40 may be the first relay CY1 shown in fig. 1, or may be other electronic switches such as a thyristor, a power tube, etc. In fig. 1, two terminals of the switch of the first relay CY1 are output terminals of the first switch 40, and a control terminal of the first relay CY1 is a control terminal of the first switch, which is connected to the first MCU30 to be controlled by the first MCU 30.
The utility model discloses a power control circuit for electromagnetic cooking utensil is through the disconnection of first MCU30 control first switch 40 when the standby to the disconnection is to the power supply of major loop, thereby makes electromagnetic cooking utensil's stand-by power consumption greatly reduced, has satisfied the standby requirement of low-power consumption.
Further, based on the first embodiment described above, in the second embodiment of the power supply control circuit, the power supply control circuit further includes the first rectification circuit 60, the surge detection circuit 70, and the voltage detection circuit 80;
the input end of the first rectifying circuit 60 is connected with an alternating current power supply through the first switch 40, the output end of the first rectifying circuit 60 is simultaneously connected with the input end of the surge detection circuit 70 and the input end of the voltage detection circuit 80, the output end of the surge detection circuit 70 and the output end of the voltage detection circuit 80 are respectively connected with the first MCU30, and when the first switch 40 is disconnected, the power supply of the alternating current power supply to the surge detection circuit 70 and the voltage detection circuit 80 is simultaneously disconnected.
In this embodiment, the ac power supply further supplies power to the surge detection circuit 70 and the voltage detection circuit 80 through the first rectification circuit 60 via the first switch 40, the ac power supply is rectified into pulsating direct current through the first rectification circuit 60 and enters the surge detection circuit 70 to detect a spike interference signal, and the voltage detection circuit 80 detects the direct current voltage of the pulsating direct current, where the surge detection circuit 70 and the voltage detection circuit 80 are both common constituent circuits in the control circuit of the electromagnetic cooking appliance, and detailed circuits thereof are not described herein again. Since the surge detection circuit 70 and the voltage detection circuit 80 consume a certain amount of power even in the standby state, the power supply to the circuits is turned off by the first switch 40 in the standby state, and the standby power consumption can be further reduced.
Specifically, as shown in fig. 1, the first rectifying circuit 60 is mainly composed of a third diode D3 and a fourth diode D4, thereby constituting a full-wave rectifying circuit.
Further, based on the above-described second embodiment, in a third embodiment of the power supply control circuit, the power supply control circuit further includes the second rectification circuit 50 and the zero-cross detection circuit 90;
the input end of the second rectifying circuit 50 is connected with an alternating current power supply, and the output end of the second rectifying circuit 50 is connected with the input end of the zero-crossing detection circuit 90;
the output end of the zero-crossing detection circuit 90 is connected with the first MCU30, and the first MCU30 controls the on-off of the first switch 40 according to the zero-crossing signal output by the zero-crossing detection circuit 90.
In this embodiment, as shown in fig. 1, the ac power source is rectified into pulsating dc power by the first rectifying circuit 60, and the pulsating dc power is input to the zero-crossing detecting circuit 90, whereby the zero-crossing pulse signal of the ac power source is output. Here, by separating the second rectifying circuit 50 of the input portion of the zero-cross detection circuit 90 from the first rectifying circuit 60 in the second embodiment described above, instead of multiplexing the first rectifying circuit 60, it is possible to detect a complete zero-cross signal of the ac power supply by interposing the second rectifying circuit 50 between the ac power supply and the first switch 40, and to control the on/off of the first switch 40 in accordance with the zero-cross signal.
Specifically, as shown in fig. 1, the second rectifying circuit 50 is mainly composed of a first diode D1 and a second diode D2, so as to form a full-wave rectifying circuit.
Since the main circuit 10 has a very large current when operating, for example, for a 2000W electromagnetic cooking appliance, the effective value of the operating current can reach about 10A, and for the alternating current inputted from the alternating current source through the first switch 40, the current changes in a sinusoidal regular cycle, and the cycle is repeated from zero point to the maximum current value and then decreases to zero point, and if the maximum current value, i.e., the peak value, exceeds 10A, so if the first switch 40 is turned on at or near these points, the current passing through the first switch 40 is very high, which is very disadvantageous to the switching device, for example, if the first switch 40 is a relay, the contact of the mechanical switch is easy to generate a sparking phenomenon when passing such a large current at the moment of turning on, which makes the switch contact easy to turn black, and the on resistance between the contacts to be long increases, so that the contact is turned on to generate a large heat to form a high temperature, further damaging the contacts and components surrounding the contacts, such as the housing. Therefore, the first switch 40 is controlled to be switched on at the zero crossing point by detecting the zero crossing signal, and the current passing through the switch at the switching-on moment is very small because the alternating current at the moment is very small or even zero, so that the problems can not be caused, the service life of components of the first switch 40 is greatly prolonged, and the working reliability of the whole power supply control circuit is improved.
The utility model discloses still provide a control circuit for electromagnetic cooking utensil, as shown in fig. 1, this control circuit includes main control board 100 and display panel 200, and wherein main control board 100 is installed in the drain pan of electromagnetic cooking utensil complete machine, including foretell power control circuit to this power control part of realizing electromagnetic cooking utensil, the coil panel is also installed in the drain pan, and display panel 200 is generally installed in the upper cover of electromagnetic cooking utensil complete machine, with this realization button instruction receipt and the relevant status information's of electromagnetic cooking utensil demonstration. Through the power control of the main control board 100, an alternating magnetic field is generated in the coil plate, so that eddy current heating is generated at the bottom of a metal pot placed on the microcrystalline glass panel of the upper cover, and food materials in the pot are heated.
The display panel 200 mainly includes a second MCU210, the second MCU210 and the first MCU30 communicate with each other through a connection line between the main control panel 100 and the display panel 200, so that the display panel 200 receives a key command and then transmits the key command to the first MCU30 of the main control panel 100 through the second MCU210 based on wired communication, thereby controlling the power control circuit to operate. And the display device of the display panel 200 receives the display signal transmitted by the second MCU210 for display.
The connecting wires not only realize the communication connection between the second MCU210 and the first MCU30, but also transmit other signals, such as the control signal sent by the second MCU210 to the main control board 100, and the dc power provided by the main control board 100, so as to supply power for the display panel 200 including the second MCU 210.
In the first embodiment of the control circuit, as shown in fig. 1, the control circuit further includes a second switch C0, a power module D0, and a switch tube driving circuit 20;
the input end of the power module D0 is connected to an ac power supply, the first output end of the power module D0 is connected to the switching tube driving circuit 20 through the second switch C0, the control end of the second switch C0 is connected to the second MCU210, and the second MCU210 controls the second switch C0 to be turned off when the electromagnetic cooking appliance is in standby, so as to disconnect the power supply of the power module D0 to the switching tube driving circuit 20.
The power module D0 outputs a first direct current via the first output terminal, and is connected to the switching tube driving circuit 20 via the second switch C0 to supply power to the switching tube driving circuit 20. The switching tube driving circuit 20 is used for driving the switching tube in the main loop circuit 10 to work like an IGBT, at this time, the switching tube driving circuit 20 is the IGBT driving circuit, the working voltage of the specific IGBT driving circuit is generally 18V, so the first direct current is about 18V, and the control end of the second switch C0 is connected to the second MCU210 through a connection line, thereby the second MCU210 controls the on-off of the second switch C0, when in standby, the second MCU210 controls the off-state of the second switch C0, thereby the power supply of the switching tube driving circuit 20 is cut off, and the standby power consumption is further reduced.
Specifically, the second switch C0 includes a first optical coupler TD1, as shown in fig. 1, two ends of a triode of the first optical coupler TD1 are output ends of the second switch C0, a cathode of a light emitting diode of the first optical coupler TD1 is grounded, and an anode of the light emitting diode of the first optical coupler TD1 is connected to the second MCU210 through a connection line.
When the second MCU210 outputs a high level, the light emitting diode of the first optocoupler TD1 is turned on to emit light, and the transistor of the first optocoupler TD1 is turned on, so that the first direct current supplies power to the switching tube driving circuit 20 through two ends of the transistor of the first optocoupler TD 1.
The second switch C0 may be other new switches such as a relay and a thyristor, besides the first optocoupler TD 1.
Further, based on the first embodiment of the control circuit, in the second embodiment of the control circuit, the first output terminal of the power module D0 is further connected to the first MCU30 through the second switch C0 to supply power to the first MCU30, and the second output terminal of the power module D0 is connected to the second MCU210 to supply power to the second MCU 210. Therefore, in standby, after the second MCU210 controls the second switch C0 to be turned off, the power supply to the first MCU30 is turned off at the same time, thereby further reducing standby power consumption.
Specifically, because the first dc voltage is higher, for example, 18V, and exceeds the operating voltage of the first MCU30, the first dc output terminal passes through the second switch C0, and then further passes through the voltage reduction module, specifically, the 5V voltage reduction module in fig. 1, and further reduces the first dc voltage to supply power to the first MCU 30.
Further, based on the second embodiment of the control circuit, in the third embodiment of the control circuit, the power module D0 includes a switching power chip D1, a first rectifying and smoothing circuit D0, a second rectifying and smoothing circuit D3, and a switching transformer T1;
the output end of the switching power supply chip D1 is connected with the input end of the first rectifying and filtering circuit D0, the output end of the first rectifying and filtering circuit D0 and one end of the primary side of the switch transformer T1 are connected with the first output end of the power supply module D0, the input end of the second rectifying and filtering circuit D3 is connected with the secondary side of the switch transformer T1, and the output end of the second rectifying and filtering circuit D3 is the second output end of the power supply module D0.
In this embodiment, the power module D0 mainly includes a switching power circuit formed by a switching power chip D1, wherein the first rectifying-smoothing circuit D0 is located on the secondary side of the switching transformer T1, so that the first rectifying-smoothing circuit D0 is not isolated by the switching transformer T1 and is connected to the ac power terminal to form a strong power terminal of the thermal ground, specifically, the first rectifying-smoothing circuit D0 mainly includes a fifth diode D5, an eighth diode D8 and a second capacitor C2, so as to implement rectifying-smoothing, and form a first dc output terminal at the anode output of the eighth diode D8. The second rectifying and filtering circuit D3 is located on the secondary side of the switching transformer T1, and mainly includes a sixth diode D6 and a third capacitor C3, and a second output terminal of the power module D0 is formed at the cathode of the sixth diode D6, and outputs a second direct current to power the second MCU 210.
Further, the main control board 100 further includes an isolation circuit, and the isolation circuit is connected in series to the communication lines of the first MCU30 and the second MCU 210. Because the first direct current is a strong current terminal, after the first output terminal is connected to the first MCU30, the first MCU30 is also a strong current terminal, and the second direct current is isolated by the switching transformer T1, and the second direct current output by the first MCU30 is an isolated weak current terminal, so that after the second output terminal is connected to the second MCU210, the second MCU210 is also a weak current terminal, and therefore the first MCU30 and the second MCU210 cannot be directly interconnected, otherwise a high voltage difference between the strong current and the weak current forms a large current on a connection line between the first MCU30 and the second MCU210, so as to damage the first MCU30 and the second MCU210, and therefore an isolation circuit needs to be added on the connection line between the two for isolation, specifically, to isolate the strong current terminal and the weak current terminal.
Specifically, the isolation circuit comprises a first isolation unit B0 and a second isolation unit A0, and the communication lines comprise a first communication line and a second communication line; the first isolation unit B0 and the second isolation unit a0 are connected in series to the first communication line and the second communication line, respectively.
As shown in fig. 1, the communication lines are specifically a first communication line and a second communication line, and implement data transmission and data reception functions, respectively, so that isolation circuits are respectively disposed on the two communication lines, specifically, a first isolation unit B0 and a second isolation unit a0 implement isolation, where the first isolation unit B0 mainly consists of a second optocoupler TD2, and the second isolation unit a0 mainly consists of a third optocoupler TD 3. The isolation of strong current and weak current is realized through the two optical couplers. Thereby ensuring proper communication between the first MCU30 and the second MCU 210.
The utility model discloses still provide an electromagnetic cooking utensil, this electromagnetic cooking utensil includes foretell control circuit who is used for electromagnetic cooking utensil, and this electromagnetic cooking utensil specifically can be one of electromagnetism stove, electromagnetic heating's electric rice cooker and electromagnetic heating's electric pressure cooker. Through the control circuit, the extremely low power consumption of the electromagnetic cooking appliance in the standby state is realized, and the standby power consumption lower than 0.5W can be realized, so that the low-power-consumption standby requirement is met.
The above is merely a preferred embodiment of the present invention, and not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (12)
1. A power control circuit for an electromagnetic cooking appliance, the power control circuit comprising:
a main loop circuit;
the first switch is connected in series in a power supply loop of an alternating current power supply to the main loop circuit;
and the control end of the first switch is connected with the first MCU, and the first MCU controls the first switch to be disconnected when the electromagnetic cooking appliance is in a standby state so as to disconnect the power supply of the alternating current power supply to the main loop.
2. The power control circuit of claim 1, further comprising:
the input end of the first rectifying circuit is connected with the alternating current power supply through the first switch;
the input end of the surge detection circuit is connected with the output end of the first rectification circuit, and the output end of the surge detection circuit is connected with the first MCU;
a voltage detection circuit; the input end of the voltage detection circuit is connected with the output end of the first rectification circuit, and the output end of the voltage detection circuit is connected with the first MCU;
and when the first switch is turned off, simultaneously turning off the power supply of the alternating current power supply to the surge detection circuit and the voltage detection circuit.
3. The power control circuit of claim 1, further comprising:
the input end of the second rectifying circuit is connected with the alternating current power supply;
the output end of the second rectifying circuit is connected with the input end of the zero-crossing detection circuit, the output end of the zero-crossing detection circuit is connected with the first MCU, and the first MCU controls the on-off of the first switch according to a zero-crossing signal output by the zero-crossing detection circuit.
4. A control circuit for an electromagnetic cooking appliance, the control circuit comprising:
a main control board including the power control circuit for the electromagnetic cooking appliance according to any one of claims 1 to 3;
and the display panel comprises a second MCU, and the second MCU is communicated with the first MCU through a connecting wire.
5. The control circuit of claim 4, wherein the master control board further comprises:
a switching tube driving circuit;
the input end of the power supply module is connected with the alternating current power supply;
and the first output end of the power supply module is connected with the switch tube driving circuit through the second switch, the control end of the second switch is connected with the second MCU, and the second MCU controls the second switch to be disconnected when the electromagnetic cooking appliance is in a standby state so as to disconnect the power supply of the power supply module to the switch tube driving circuit.
6. The control circuit of claim 5, wherein the first output terminal of the power module is further connected to the first MCU via the second switch to supply power to the first MCU, and the second output terminal of the power module is connected to the second MCU to supply power to the second MCU.
7. The control circuit of claim 6, wherein the power module comprises:
a first rectifying and filtering circuit;
the output end of the switching power supply chip is connected with the input end of the first rectifying and filtering circuit;
the output end of the first rectifying and filtering circuit and one end of the primary side of the switching transformer are connected to the first output end of the power supply module in a sharing mode;
and the input end of the second rectifying and filtering circuit is connected with the secondary of the switch transformer, and the output end of the second rectifying and filtering circuit is the second output end of the power module.
8. The control circuit of claim 7, wherein the main control board further comprises an isolation circuit, and the isolation circuit is connected in series with the communication lines of the first MCU and the second MCU.
9. The control circuit of claim 8, wherein the isolation circuit comprises:
a first isolation unit and a second isolation unit;
the communication lines comprise a first communication line and a second communication line, and the first isolation unit and the second isolation unit are respectively connected in series with the first communication line and the second communication line.
10. The control circuit of claim 4, wherein the first switch comprises a first relay;
the two ends of the switch of the first relay are the output end of the first switch, and the control end of the first relay is the control end of the first switch.
11. The control circuit of claim 5, wherein the second switch comprises a first optocoupler;
the two ends of the triode of the first optocoupler are output ends of the second switch, the cathode of the light emitting diode of the first optocoupler is grounded, and the anode of the light emitting diode of the first optocoupler is connected with the second MCU through the connecting wire.
12. An electromagnetic cooking appliance, characterized in that it comprises a control circuit for an electromagnetic cooking appliance according to any one of claims 5 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921442931.1U CN210222536U (en) | 2019-08-30 | 2019-08-30 | Power supply control circuit, control circuit and electromagnetic cooking utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921442931.1U CN210222536U (en) | 2019-08-30 | 2019-08-30 | Power supply control circuit, control circuit and electromagnetic cooking utensil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210222536U true CN210222536U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921442931.1U Active CN210222536U (en) | 2019-08-30 | 2019-08-30 | Power supply control circuit, control circuit and electromagnetic cooking utensil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210222536U (en) |
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2019
- 2019-08-30 CN CN201921442931.1U patent/CN210222536U/en active Active
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