CN111404134A - Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance - Google Patents
Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance Download PDFInfo
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- CN111404134A CN111404134A CN202010168591.9A CN202010168591A CN111404134A CN 111404134 A CN111404134 A CN 111404134A CN 202010168591 A CN202010168591 A CN 202010168591A CN 111404134 A CN111404134 A CN 111404134A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
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- Induction Heating Cooking Devices (AREA)
Abstract
The invention discloses a safety control circuit for an electromagnetic cooking appliance and the electromagnetic cooking appliance, wherein a rectifying circuit of the safety control circuit comprises a first rectifying module, a selector switch and a second rectifying module, wherein the first rectifying module and the selector switch form a switchable rectifying unit, the output end of the rectifying unit is connected with an electromagnetic heating drive circuit, and the output end of the second rectifying module is connected with a switching power supply; the switching power supply is connected with the controller and the discharging device to provide working voltage; the controller is connected with the rectifying circuit to acquire voltage signals, when the power is off, the rectifying diode in the first rectifying module and the second rectifying module are combined to form a discharging rectifying unit, and the discharging rectifying unit supplies working voltage to the switching power supply so that residual voltage is released through a discharging device connected with the switching power supply. The safety control circuit for the electromagnetic cooking appliance can realize discharge without connecting discharge resistors in parallel at two ends of a lead connected with a main power supply, and can reduce the cost of a discharge circuit.
Description
Technical Field
The invention belongs to the technical field of discharge circuits, and particularly relates to a safety control circuit for an electromagnetic cooking appliance and the electromagnetic cooking appliance.
Background
When the electromagnetic cooking appliance is powered off, because voltage still exists in the power grid, if residual voltage in the power grid is not timely discharged, some safety accidents harmful to users may be caused.
In a discharge circuit in the prior art, a switch is usually used to control a rectifier module, and when a circuit system is powered off, since the circuit system cannot normally discharge in a half-wave rectification mode, the rectifier module needs to be switched to a full-wave rectification mode for discharging through controlling the switch, or a discharge resistor needs to be connected in parallel to two ends of an alternating current power supply for discharging. In the discharging mode of the discharging circuit, the switching of the switch is controlled according to the working state of the rectifying module during power failure, so that the problem of untimely discharging can be caused when the rectifying module is switched to a full-wave rectifying mode; in the latter, a discharge resistor needs to be connected in parallel at two ends of an alternating current power supply, and the power consumption of the discharge resistor and the power consumption of the whole electromagnetic cooking appliance system are overlapped, so that the power consumption of the whole electromagnetic cooking appliance is larger than the standby power consumption requirement, namely, the power consumption of the whole electromagnetic cooking appliance is increased by increasing the discharge resistor.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a safety control circuit for an electromagnetic cooking appliance and an electromagnetic cooking appliance, and the safety control circuit for an electromagnetic cooking appliance of the present application can realize discharge without connecting a discharge resistor in parallel at both ends of a lead connected to a main power supply, so that the cost of the discharge circuit can be reduced.
The invention is realized by the following technical scheme:
according to a first aspect, the embodiment of the invention provides a safety control circuit for an electromagnetic cooking appliance, which comprises a filter capacitor I, a rectifying circuit, an electromagnetic heating driving circuit, a switching power supply, a controller and a discharging device, wherein the controller is connected with the discharging device and the electromagnetic heating driving circuit; the switching power supply is connected with the controller and the discharging device to provide working voltage; the controller is connected with the rectifying circuit to acquire voltage signals, when the power is off, the rectifying diode in the first rectifying module and the second rectifying module are combined to form a discharging rectifying unit, and the discharging rectifying unit supplies working voltage to the switching power supply so that residual voltage is released through a discharging device connected with the switching power supply.
In a preferred implementation, the first rectifier module comprises an input, a positive voltage output and a negative voltage output, with a diverter switch disposed between the input and the positive voltage output.
In a preferred implementation mode, the rectifying circuit comprises a diode D1, a diode D2, a diode D3 and a diode D4, the negative electrode connecting point of the diode D1 and the diode D3 is a positive voltage output end of the first rectifying module, the positive electrode connecting point of the diode D2 and the diode D4 is a negative voltage output end of the first rectifying module, the N end connected with the main power supply is connected with the negative electrode of the diode D2 and the positive electrode of the diode D1, and the L end connected with the main power supply is connected with the negative electrode of the diode D4 and the change-over switch.
In a preferred implementation manner, the second rectification module comprises a first unidirectional rectifier and a second unidirectional rectifier which are respectively connected with two ends of the first filter capacitor; the first one-way rectifier is a one-way silicon controlled rectifier or a one-way diode, and/or the second one-way rectifier is a one-way silicon controlled rectifier or a one-way diode.
In a preferred implementation, the discharge device is a fan.
In a preferred implementation manner, the electromagnetic heating driving circuit comprises a filtering voltage stabilizing circuit and a resonant circuit; the rectifying unit is electrically connected with the filtering and voltage stabilizing circuit, and the filtering and voltage stabilizing circuit is electrically connected with the resonant circuit.
In a preferred implementation manner, the filtering voltage stabilizing circuit includes an inductor and a second filtering capacitor, and the inductor, the second filtering capacitor and the negative voltage output terminal of the first rectifying module are connected in series.
In a preferred implementation, the diverter switch is a single pole single throw switch, a relay, or a triac.
In a preferred implementation, the switch is configured to switch the first rectification module to a full-wave rectification state or a half-wave rectification state, and in the half-wave rectification state, the power of the electromagnetic cooking appliance is below 1000W.
According to a second aspect, an embodiment of the present invention provides an electromagnetic cooking appliance, including the safety control circuit for an electromagnetic cooking appliance of the first aspect or any implementation manner of the first aspect.
Through the technical scheme of the embodiment of the invention, the following technical effects can be achieved:
1. through the safety control circuit, the rectifier diode in the first rectifier module and the second rectifier module can be combined to form the discharge rectifier unit, the discharge rectifier unit supplies the working voltage of the switching power supply, so that the electromagnetic cooking utensil is discharged through the discharge device, and when the power failure occurs, the safety control circuit can perform normal discharge no matter the first rectifier module is in a full-wave rectification state or a half-wave rectification state, the working state of the first rectifier module does not need to be switched, meanwhile, an additional discharge resistor does not need to be added, the cost is reduced, and meanwhile, the power consumption of the whole circuit system can also be reduced.
2. The switch is arranged between the input end and the positive voltage output end of the first rectifying module, so that the first rectifying module can be switched between half-wave rectification and full-wave rectification.
3. The first rectifying module comprises a diode D1, a diode D2, a diode D3 and a diode D4, and a rectifying bridge is formed by the four diodes, so that the electromagnetic heating driving circuit can work normally under the condition of alternating current power supply.
4. The second rectifying module comprises a first unidirectional rectifier and a second unidirectional rectifier, the first unidirectional rectifier and the second unidirectional rectifier can be unidirectional silicon controlled rectifiers or unidirectional diodes, rectification can be realized by simple electronic elements, and the circuit cost is low.
5. The discharging device can be a fan, the fan can be started and stopped in time, and the control is simple.
6. The electromagnetic heating driving circuit specifically comprises a filtering and voltage stabilizing circuit and a resonant circuit, wherein the filtering and voltage stabilizing circuit can filter interference signals in the circuit, and the resonant circuit can realize eddy current generation so as to heat a pot placed in an electromagnetic cooking appliance.
7. The filtering voltage stabilizing circuit particularly comprises an inductor and a second filtering capacitor, and the inductor and the second filtering capacitor are combined to enable a voltage signal input to the resonant circuit to be stable.
8. The specific form of the change-over switch is a single-pole single-throw switch, a relay or a bidirectional thyristor, the control mode is simple, and the circuit cost is saved.
9. The working state of the first rectifying module is controlled through the selector switch, so that the electromagnetic heating driving circuit is controlled.
10. The electromagnetic cooking appliance comprises the safety control circuit for the electromagnetic cooking appliance, when a circuit system is powered off, the electromagnetic cooking appliance can realize timely discharging without switching the working state of an additional first rectifier module or increasing a discharging resistor, and is low in power consumption and circuit cost.
Drawings
Fig. 1 shows a schematic diagram of a safety control circuit of an electromagnetic cooking appliance according to an embodiment of the present invention;
fig. 2 shows another schematic diagram of a safety control circuit of an electromagnetic cooking appliance according to an embodiment of the present invention;
reference numerals:
1-a filter capacitor I, 2-a rectifying circuit, 211-a first rectifying module, 212-a change-over switch, 22-a second rectifying module, 3-an electromagnetic heating driving circuit, 31-a harmonic voltage stabilizing circuit, 311-an inductor, 312-a filter capacitor II, 32-a resonant circuit, 4-a switching power supply, 5-a controller and 6-a discharging device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms of orientation such as left, right, up, down, front and back in the embodiments of the present invention are only relative concepts or are referred to a normal use state of the product, i.e., a traveling direction of the product, and should not be considered as limiting.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiment of the invention provides a safety control circuit of an electromagnetic cooking appliance, as shown in fig. 1, the safety control circuit comprises a filter capacitor I1, a rectifying circuit 2, an electromagnetic heating driving circuit 3, a switching power supply 4, a controller 5 and a discharging device 6, wherein the controller 5 is connected with the discharging device 6 and the electromagnetic heating driving circuit 3.
Specifically, as shown in fig. 1, the terminal L and the terminal N are respectively connected to a main power supply, and the first filter capacitor 1 is connected in parallel to two terminals of an alternating current power supply, the rectifier circuit 2 comprises a first rectifier module 211, a switch 212 and a second rectifier module 22, here, the first rectifier module 211 and the switch 212 form a switchable rectifier unit 21, the output terminal of the rectifier unit 21 is connected to the electromagnetic heating driving circuit 3, and the output terminal of the second rectifier module 22 is connected to the switching power supply 4.
The switching power supply 4 is connected to the controller 5 and the discharging device 6 to supply an operating voltage thereto. The controller 5 is connected with the rectifying circuit 2 to collect voltage signals.
In the entire circuit system, the first rectification module 211 may be switched between a half-wave rectification operating state and a full-wave rectification operating state by the switch 212 to convert the input ac voltage into a dc voltage. The control terminal of the changeover switch 212 is connected to the controller 5. The controller 5 can control the electromagnetic heating driving circuit 3 to generate eddy current by controlling the on and off of the electromagnetic heating driving circuit 3, so as to heat a pot placed in the electromagnetic cooking appliance.
When power is off, the rectifier diode in the first rectifier module 211 and the second rectifier module 22 combine to form a discharge rectifier unit, and the discharge rectifier unit supplies the operating voltage of the switching power supply 4, so that the residual voltage in the circuit system is released through the discharge device 6 connected with the switching power supply 4.
In a preferred implementation manner, the first rectification module 211 includes an input end, a positive voltage output end and a negative voltage output end, and the switch 212 is disposed between the input end and the positive voltage output end, so as to implement connection control of the diodes in the first rectification module, and enable the first rectification module 211 to switch between a half-wave rectification operating state and a full-wave rectification operating state. In the half-wave rectification state, the power of the electromagnetic cooking appliance is below 1000W.
Specifically, when the circuit system is powered off, the first filter capacitor 1 stores voltage, and at this time, the second rectifier module 22 in the rectifier circuit 2 and the two diodes connected with the negative voltage output end in the first rectifier module 211 form full-bridge rectification, specifically, when the end L is positive voltage at the moment of power failure, the current trend is that the end L-the second rectifier module 22-the switching power supply 4-the controller 5-the discharge device 6-the end 211-N of the first rectifier module because the first filter capacitor 1 has voltage, and when the end N is positive voltage at the moment of power failure, the current trend is that the end N-the second rectifier module 22-the switching power supply 4-the controller 5-the discharge device 6-the end 211-L of the first rectifier module because the first filter capacitor 1 has voltage.
It can be known from the above current flow direction analysis that, no matter how positive and negative the voltages of the L terminal and the N terminal connected to the ac power supply in the circuit system are at the moment of power failure, and no matter whether the first rectification module 211 is in the half-wave rectification operating state or the full-wave rectification operating state, the safety control circuit of the embodiment of the present invention can release the voltage in the first filter capacitor 1, that is, discharge the residual electric quantity in the circuit, the residual voltage in the first filter capacitor 1 can charge the switching power supply 4, and the switching power supply 4 can provide electric energy for the controller 5 and the discharge device 6, so as to reasonably utilize the residual electric quantity in the circuit system, and further, there is no need to add a discharge resistor or switch the operating state of the first rectification module 211.
Through the safety control circuit, the rectifier diode in the first rectifier module 211 and the second rectifier module 22 can be combined to form a discharge rectifier unit, the discharge rectifier unit supplies the working voltage of the switching power supply 4, so that the discharge device can discharge 6 the electromagnetic cooking utensil, and when the power failure occurs, the safety control circuit can perform normal discharge no matter the first rectifier module 211 is in a full-wave rectification state or a half-wave rectification state, the working state of the first rectifier module 211 does not need to be switched, meanwhile, an additional discharge resistor does not need to be added, the cost is reduced, and the power consumption of the whole circuit system can be reduced.
In a preferred implementation manner of this embodiment, as shown in fig. 2, the first rectification module 211 includes a diode D1, a diode D2, a diode D3, and a diode D4., specifically, a connection point of cathodes of the diode D1 and the diode D3 is an anode output terminal of the rectification circuit 3, and a connection point of anodes of the diode D2 and the diode D4 is a negative voltage output terminal of the first rectification module 211, the N terminal of the main power supply is connected to the cathode of the diode D2 and the anode of the diode D1, the L terminal of the main power supply is connected to the cathode of the diode D4 and the switch 212, that is, as shown in fig. 2, a connection point of the diode D1 and the diode D3 is a positive voltage output terminal of the first rectification module, a connection point of the diode D2 and the diode D4 is a negative voltage output terminal of the first rectification module 211, the L terminal is connected between the diode D3 and the diode D4, and the N terminal is connected between the diode D1.
A first contact of the changeover switch 212 is connected to the anode of the diode D3, and a second contact of the changeover switch 212 is connected to the L terminal of the main power supply and the cathode of the diode D4.
Here, the switch 212 may be a single-pole single-throw switch, a relay, or a triac, but the embodiment is not limited thereto. As an example, in this implementation, the switch 212 is a relay. The controller 5 may control the first rectification module 211 to switch between the half-wave rectification operation state and the full-wave rectification operation state by controlling the opening or closing of the relay. Specifically, when the relay is opened, the first rectifying module 211 is in a half-wave rectifying operation state, and when the relay is closed, the first rectifying module 211 is in a full-wave rectifying operation state.
In a preferred implementation manner of the present embodiment, the second rectification module 22 includes a first unidirectional rectifier and a second unidirectional rectifier, which are respectively connected to two ends of the first filter capacitor 1, specifically, as shown in fig. 2, an anode of the first unidirectional rectifier is electrically connected to the N end connected to the main power supply, a cathode of the first unidirectional rectifier is electrically connected to the input end of the switching power supply 4, an anode of the second unidirectional rectifier is electrically connected to the L end connected to the main power supply, a cathode of the second unidirectional rectifier is electrically connected to a cathode of the first unidirectional rectifier and the input end of the switching power supply 4, the first output end of the switching power supply 4 is electrically connected to the discharging device 6, and the second output end is electrically connected to the controller 5.
The first unidirectional rectifier and the second unidirectional rectifier of the implementation mode can be unidirectional silicon controlled rectifiers or unidirectional diodes respectively. In order to save cost, as shown in fig. 2, the first unidirectional rectifier and the second unidirectional rectifier are both diodes. Here, the diode D5 is a first unidirectional rectifier, and the diode D6 is a second unidirectional rectifier.
In order to enable the controller 5 to better obtain the power-off signal, in this implementation manner, the safety control circuit is further provided with a sampling resistor R1 and a sampling resistor R2, as shown in fig. 2, specifically, when the capacitor C1 (where the capacitor C1 is the filter capacitor one 1) discharges, current can flow into the controller 5 through the R1, so that the controller 5 detects the power-off signal, and starts to drive the fan to discharge. The discharge device 6 may be a fan, for example, or may be another discharge device, but the present embodiment is not limited thereto.
The electromagnetic heating driving circuit 3 of this embodiment may specifically include a harmonic voltage stabilizing circuit 31 and a resonant circuit 32, the rectifying unit 21 is electrically connected to the harmonic voltage stabilizing circuit 31, and the harmonic voltage stabilizing circuit 31 is electrically connected to the resonant circuit 32. as shown in fig. 2, the harmonic voltage stabilizing circuit 31 includes an inductor 311 and a second filter capacitor 312, L in fig. 2 is the inductor 311, C2 is the second filter capacitor 312, C2 is grounded, the negative voltage output end of the first rectifying module 211 is connected to a resistor R3, and the other end of the R3 is grounded.
Taking fig. 2 as an example, the embodiment further provides a specific working principle of the safety control circuit for an electromagnetic cooking appliance of the present application:
when the switch K1 is closed and the first rectifying module 211 is in a full-wave rectification operating state, if the L end connected to the ac power supply is a positive voltage, the capacitor C1 (the first filter capacitor 1) stores a voltage, the capacitor C1 discharges outwards, and the controller 5 detects that the circuit system is powered off and drives the fan to discharge, at this time, the current trend is L end-D6-switch power supply-fan-GND-R3-D2-N end, so that a power consumption loop is formed, and the residual electric quantity in the capacitor C1 is discharged through the rotation of the fan.
When the switch K1 is closed and the first rectifying module 211 is in a full-wave rectification operating state, if the N terminal connected to the ac power supply is a positive voltage, the capacitor C1 (filter capacitor one 1) stores a voltage, the capacitor C1 discharges outwards, and the controller 5 detects that the circuit system is powered off and drives the fan to discharge, at this time, the current goes to the N terminal-D5-switch power supply-fan-GND-R3-D4-L terminal, so that a power consumption loop is formed, and the residual electric quantity in the capacitor C1 is discharged through the rotation of the fan.
When the switch K1 is turned off and the first rectifying module 211 is in a half-wave rectifying working state, if the L end connected to the ac power supply is a positive voltage, the capacitor C1 (the first filter capacitor 1) stores a voltage, the capacitor C1 discharges outwards, and the controller 5 detects that the circuit system is powered off and drives the fan to discharge, at this time, the current trend is L end-D6-switch power supply-fan-GND-R3-D2-N end, so that a power consumption loop is formed, and the residual electric quantity in the capacitor C1 is discharged through the rotation of the fan.
When the switch K1 is turned off and the first rectifying module 211 is in a half-wave rectifying working state, if the N terminal connected to the ac power supply is a positive voltage, the capacitor C1 (filter capacitor one 1) stores a voltage, the capacitor C1 discharges outwards, and the controller 5 detects that the circuit system is powered off and drives the fan to discharge, at this time, the current goes to the N terminal-D5-switch power supply-fan-GND-R3-D4-L terminal, so that a power consumption loop is formed, and the residual electric quantity in the capacitor C1 is discharged through the rotation of the fan.
As can be seen from the above analysis, the safety control circuit of the embodiment of the present invention can discharge the voltage remaining in the power grid, and does not need to increase a discharge resistor or switch the operating state of the rectifying circuit 3, regardless of whether the voltage at L, which is connected to the ac power supply at the moment of power failure, is positive or the voltage at N is positive, and regardless of whether the K1 is in the open or closed state at this time, that is, regardless of whether the first rectifying module 211 is in the half-wave rectifying operating state or the full-wave rectifying operating state.
Meanwhile, in order to discharge the voltage in the filter capacitor one 1 in the prior art, a discharge resistor needs to be connected in parallel at two ends of the filter capacitor one 1, and the power consumption of the discharge resistor is 0.5-1W. The power consumption of the whole electromagnetic cooking appliance is about 0.9W, after the two parts are overlapped, the power consumption of the whole electromagnetic cooking appliance is larger than 1W, the standby power consumption of the electromagnetic stove is required to be within 1W, and therefore the existing mode of adding a discharge resistor cannot meet the requirement of secondary energy efficiency. The safety control circuit does not need to increase a discharge resistor, the power consumption of the whole machine can be kept about 0.9W, and the requirement of secondary energy efficiency standby power consumption is met.
Another embodiment of the present invention further provides an electromagnetic cooking appliance, where the electromagnetic cooking appliance includes the safety control circuit of the electromagnetic cooking appliance in the above specific implementation manner, so that the electromagnetic cooking appliance of this embodiment can realize timely discharging without switching the working state of an additional rectifier circuit or adding a discharging resistor when a circuit system is powered off, and the electromagnetic cooking appliance has low power consumption and low circuit cost.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A safety control circuit for an electromagnetic cooking appliance comprises a filter capacitor I (1), a rectifying circuit (2), an electromagnetic heating drive circuit (3), a switching power supply (4), a controller (5) and a discharging device (6), wherein the controller (5) is connected with the discharging device (6) and the electromagnetic heating drive circuit (3),
the rectifying circuit (2) comprises a first rectifying module (211), a selector switch (212) and a second rectifying module (22), the first rectifying module (211) and the selector switch (212) form a switchable rectifying unit (21), the output end of the rectifying unit (21) is connected with the electromagnetic heating driving circuit (3), and the output end of the second rectifying module (22) is connected with the switching power supply (4);
the switching power supply (4) is connected with the controller (5) and the discharging device (6) to provide working voltage;
the controller (5) is connected with the rectifying circuit (2) to collect voltage signals, when the power is off, a rectifying diode in the first rectifying module (211) and the second rectifying module (22) are combined to form a discharging rectifying unit, and the discharging rectifying unit supplies working voltage to the switching power supply (4) so that residual voltage is released through a discharging device (6) connected with the switching power supply (4).
2. The safety control circuit according to claim 1, wherein the first rectifier module (211) comprises an input, a positive voltage output and a negative voltage output, the switch (212) being arranged between the input and the positive voltage output.
3. The safety control circuit according to claim 2, wherein the first rectifying module (211) comprises: diode D1, diode D2, diode D3, and diode D4;
the negative electrode connecting point of the diode D1 and the diode D3 is a positive voltage output end of the first rectifying module (211), the positive electrode connecting point of the diode D2 and the diode D4 is a negative voltage output end of the first rectifying module (211), the N end connected with a main power supply is connected with the negative electrode of the diode D2 and the positive electrode of the diode D1, and the L end connected with the main power supply is connected with the negative electrode of the diode D4 and the switch (212).
4. The safety control circuit according to claim 1, wherein the second rectification module (22) comprises a first unidirectional rectifier and a second unidirectional rectifier respectively connected to two ends of the first filter capacitor (1);
the first one-way rectifier is a one-way silicon controlled rectifier or a one-way diode, and/or the second one-way rectifier is a one-way silicon controlled rectifier or a one-way diode.
5. Safety control circuit according to claim 1, characterized in that the discharge device (6) is a fan.
6. The safety control circuit according to claim 2, wherein the electromagnetic heating drive circuit (3) comprises a filter regulation circuit (31) and a resonance circuit (32);
the rectifying unit (21) is electrically connected with the filtering and voltage stabilizing circuit (31), and the filtering and voltage stabilizing circuit (31) is electrically connected with the resonant circuit (32).
7. The safety control circuit according to claim 6, wherein the filter voltage regulation circuit (31) comprises an inductor (311) and a second filter capacitor (312), and the inductor (311), the second filter capacitor (312) and the negative voltage output terminal of the first rectifying module (211) are connected in series.
8. The safety control circuit according to claim 1, wherein the switch (212) is a single pole single throw switch, a relay, or a triac.
9. The safety control circuit according to any of claims 1-8, wherein the switch (212) is configured to switch the first rectifying module (211) to a full-wave rectifying state or a half-wave rectifying state, wherein the power of the electromagnetic cooking appliance is below 1000W.
10. An electromagnetic cooking appliance comprising the safety control circuit for an electromagnetic cooking appliance of any one of claims 1 to 9.
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| CN202010168591.9A CN111404134A (en) | 2020-03-12 | 2020-03-12 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
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| CN202010168591.9A CN111404134A (en) | 2020-03-12 | 2020-03-12 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201138253A (en) * | 2010-04-22 | 2011-11-01 | Leadtrend Tech Corp | Discharging module applied in a switched-mode power supply and method thereof |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN106937424A (en) * | 2017-04-07 | 2017-07-07 | 杭州信多达电器有限公司 | A kind of Electromagnetic Heating controls circuit |
| CN107015513A (en) * | 2017-06-06 | 2017-08-04 | 浙江绍兴苏泊尔生活电器有限公司 | Control circuit, household appliance and power supply method of household appliance |
| CN108966397A (en) * | 2018-07-05 | 2018-12-07 | 九阳股份有限公司 | The power control circuit and Poewr control method of electromagnetic heater |
| US20190029078A1 (en) * | 2017-07-24 | 2019-01-24 | Haier Us Appliance Solutions, Inc. | Determining resonant frequency for quasi-resonant induction cooking devices |
| CN110708780A (en) * | 2019-09-04 | 2020-01-17 | 九阳股份有限公司 | Rectifier bridge stack for electromagnetic heating control and electromagnetic heating circuit |
| CN211630096U (en) * | 2020-03-12 | 2020-10-02 | 九阳股份有限公司 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
-
2020
- 2020-03-12 CN CN202010168591.9A patent/CN111404134A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201138253A (en) * | 2010-04-22 | 2011-11-01 | Leadtrend Tech Corp | Discharging module applied in a switched-mode power supply and method thereof |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN106937424A (en) * | 2017-04-07 | 2017-07-07 | 杭州信多达电器有限公司 | A kind of Electromagnetic Heating controls circuit |
| CN107015513A (en) * | 2017-06-06 | 2017-08-04 | 浙江绍兴苏泊尔生活电器有限公司 | Control circuit, household appliance and power supply method of household appliance |
| US20190029078A1 (en) * | 2017-07-24 | 2019-01-24 | Haier Us Appliance Solutions, Inc. | Determining resonant frequency for quasi-resonant induction cooking devices |
| CN108966397A (en) * | 2018-07-05 | 2018-12-07 | 九阳股份有限公司 | The power control circuit and Poewr control method of electromagnetic heater |
| CN110708780A (en) * | 2019-09-04 | 2020-01-17 | 九阳股份有限公司 | Rectifier bridge stack for electromagnetic heating control and electromagnetic heating circuit |
| CN211630096U (en) * | 2020-03-12 | 2020-10-02 | 九阳股份有限公司 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
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Application publication date: 20200710 |