CN110366282B - Electromagnetic heating device and control method thereof - Google Patents
Electromagnetic heating device and control method thereof Download PDFInfo
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- CN110366282B CN110366282B CN201810317093.9A CN201810317093A CN110366282B CN 110366282 B CN110366282 B CN 110366282B CN 201810317093 A CN201810317093 A CN 201810317093A CN 110366282 B CN110366282 B CN 110366282B
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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
- H05B6/04—Sources of current
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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
- H05B6/06—Control, e.g. of temperature, of power
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Abstract
The invention discloses an electromagnetic heating device and a control method thereof, wherein the device comprises: the first end of the first switch circuit is connected with the second power supply input end; the input filter circuit is used for filtering the alternating current; the input end of the resonant heating loop is connected with the output end of the input filter circuit; the first rectifying module is used for rectifying the alternating current; the switching power supply module is provided with a first power supply output end for providing a first preset power supply, and is used for converting the rectified alternating current to generate the first preset power supply; the first end of the second switch circuit is connected with the first power output end of the switch power supply module, and the second end of the second switch circuit is connected with the power supply end of the driving circuit; the control chip is used for acquiring a standby signal and controlling the first switch circuit and the second switch circuit to be switched off when the standby signal is acquired, so that the standby power consumption of the electromagnetic heating equipment can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an electromagnetic heating device and a control method of the electromagnetic heating device.
Background
Most circuits of the electromagnetic heating device in the related art are powered on in a standby state, for example, the input filter circuit, the surge detection circuit, the zero-cross detection circuit, the voltage detection circuit, the IGBT driving circuit, and the like are all powered on in a standby state. However, the related art has a problem that the standby power consumption of the whole machine is large, so that the situation that the CE authentication is not met may occur, and the sale of the electromagnetic heating device is influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide an electromagnetic heating device, which can effectively reduce the standby power consumption of the electromagnetic heating device.
Another object of the present invention is to provide a control method of an electromagnetic heating device.
In order to achieve the above object, an embodiment of an aspect of the present invention provides an electromagnetic heating apparatus, including: a first power input terminal and a second power input terminal through which an alternating current is input; a first switch circuit, a first end of the first switch circuit being connected to the second power input terminal; a first input end of the input filter circuit is connected with the first power supply input end, a second input end of the input filter circuit is connected with a second end of the first switch circuit, and the input filter circuit is used for filtering the alternating current; the input end of the resonant heating loop is connected with the output end of the input filter circuit, and the resonant heating loop comprises a power switch tube and a driving circuit for driving the power switch tube; a first input end of the first rectifying module is connected with the first power input end, a second input end of the first rectifying module is connected with the second power input end, and the first rectifying module is used for rectifying the alternating current; the input end of the switching power supply module is connected with the output end of the first rectifying module, the switching power supply module is provided with a first power supply output end for providing a first preset power supply, and the switching power supply module is used for converting rectified alternating current to generate the first preset power supply; a first end of the second switch circuit is connected with the first power output end of the switch power supply module, and a second end of the second switch circuit is connected with a power supply end of the driving circuit; and the control chip is respectively connected with the control end of the first switch circuit and the control end of the second switch circuit, and is used for acquiring a standby signal and controlling the first switch circuit and the second switch circuit to be switched off when the standby signal is acquired.
According to the electromagnetic heating device provided by the embodiment of the invention, alternating current is input through a first power input end and a second power input end, a first end of a first switch circuit is connected with the second power input end, a first input end and a second input end of an input filter circuit are respectively connected with the first power input end and a second end of the first switch circuit, the input filter circuit filters the alternating current, an input end of a resonant heating loop is connected with an output end of the input filter circuit, the resonant heating loop comprises a power switch tube and a driving circuit for driving the power switch tube, a first rectifying module rectifies the alternating current, a switch power module converts the rectified alternating current to generate a first preset power, a first end of a second switch circuit is connected with a first power output end of the switch power module, and a second end of the second switch circuit is connected with a power end of the driving circuit, the control chip acquires the standby signal and controls the first switch circuit and the second switch circuit to be switched off when the standby signal is acquired. Therefore, the first switch circuit and the second switch circuit are switched off in the standby state, so that the input filter circuit and the driving circuit are powered off, the standby power consumption of the whole machine is effectively reduced, the standby power consumption of the whole machine is ensured to meet CE authentication, and the normal sale of the whole machine is ensured.
According to an embodiment of the present invention, the switching power supply module may further have a second power output terminal for providing a second preset power, wherein a first terminal of the third switching circuit is connected to the second power output terminal of the switching power supply module, and a second terminal of the third switching circuit is connected to the power terminal of the control chip; and the power supply end of the display panel is connected with the second power supply output end, the control end of the display panel is connected with the control end of the third switch circuit, the display panel is communicated with the control chip, and the display panel controls the third switch circuit to be switched off after the control chip controls the first switch circuit and the second switch circuit to be switched off.
According to an embodiment of the present invention, the display panel may be configured to receive a standby command and send a standby signal to the control chip when receiving the standby command.
According to an embodiment of the present invention, the display panel may be further configured to receive an operation command, and control the third switch circuit to be closed when the operation command is received; the control chip is further used for controlling the first switch circuit and the second switch circuit to be closed after the display panel controls the third switch circuit to be closed.
According to an embodiment of the present invention, the first switching circuit may include: a switch of the relay is connected between the second power input end and the second input end of the input filter circuit; the input end of the relay driving circuit is used as the control end of the first switch circuit and is connected with the control chip, and the output end of the relay driving circuit is connected with the coil of the relay; the control chip controls the switch of the relay to be switched on or switched off through the relay driving circuit.
According to an embodiment of the present invention, the electromagnetic heating apparatus may further include: the input end of the zero-crossing detection circuit is connected with the output end of the first rectifying module, and the zero-crossing detection circuit is used for detecting a zero crossing point; the zero-crossing detection circuit is further connected with the control chip, and the control chip is used for controlling the first switch circuit to be switched on or switched off when the zero-crossing detection circuit detects a zero crossing point.
According to an embodiment of the present invention, the electromagnetic heating apparatus may further include: a surge detection circuit; a voltage detection circuit; and a first input end of the second rectifying module is connected with the first power input end, a second input end of the second rectifying module is connected with a second end of the first switching circuit, an output end of the second rectifying module is respectively connected with the surge detection circuit and the voltage detection circuit, and the second rectifying module is used for rectifying the alternating current to supply power for the surge detection circuit and the voltage detection circuit.
According to an embodiment of the present invention, the electromagnetic heating device may be an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an induction cooker.
In order to achieve the above object, in another aspect, the present invention provides a control method for an electromagnetic heating device, where the electromagnetic heating device includes a first power input terminal, a second power input terminal, a first switch circuit, an input filter circuit, a resonant heating loop, a first rectifying module, a switch power module, a second switch circuit, and a control chip, a first terminal of the first switch circuit is connected to the second power input terminal, a first input terminal of the input filter circuit is connected to the first power input terminal, a second input terminal of the input filter circuit is connected to a second terminal of the first switch circuit, an input terminal of the resonant heating loop is connected to an output terminal of the input filter circuit, the resonant heating loop includes a power switch tube and a driving circuit for driving the power switch tube, a first input terminal of the first rectifying module is connected to the first power input terminal, the second input end of the first rectifying module is connected with the second power input end, the input end of the switching power supply module is connected with the output end of the first rectifying module, the switching power supply module is provided with a first power output end for providing a first preset power supply, the first end of the second switching circuit is connected with the first power output end of the switching power supply module, and the second end of the second switching circuit is connected with the power supply end of the driving circuit, and the method comprises the following steps: the control chip acquires a standby signal; and the control chip controls the first switch circuit and the second switch circuit to be switched off when the control chip acquires a standby signal.
According to the control method of the electromagnetic heating device provided by the embodiment of the invention, the standby signal is obtained through the control chip, and the first switch circuit and the second switch circuit are controlled to be switched off when the standby signal is obtained. Therefore, the control method of the embodiment of the invention can cut off the power of the input filter circuit and the drive circuit by disconnecting the first switch circuit and the second switch circuit when in standby, thereby effectively reducing the standby power consumption of the whole machine, ensuring that the standby power consumption of the whole machine conforms to CE authentication and ensuring the normal sale of the whole machine.
According to an embodiment of the present invention, the switching power module may further have a second power output terminal for providing a second preset power, the electromagnetic heating apparatus further includes a third switching circuit and a display panel, a first terminal of the third switching circuit is connected to the second power output terminal of the switching power module, a second terminal of the third switching circuit is connected to a power terminal of the display chip, a power terminal of the display panel is connected to the second power output terminal, and the display panel is in communication with the control chip, the method further includes: the display panel controls the third switch circuit to be turned off after the control chip controls the first switch circuit and the second switch circuit to be turned off.
According to an embodiment of the present invention, the display panel may receive a standby instruction; and the display panel sends a standby signal to the control chip when receiving a standby instruction.
According to an embodiment of the present invention, the display panel may receive a work order and control the third switch circuit to be closed when receiving the work order; the control chip controls the first switch circuit and the second switch circuit to be closed after the display panel controls the third switch circuit to be closed.
According to an embodiment of the present invention, the electromagnetic heating apparatus may further include a zero-crossing detection circuit, an input terminal of the zero-crossing detection circuit being connected to an output terminal of the first rectification module, and the method further includes: and the control chip controls the first switch circuit to be switched on or switched off when the zero-crossing detection circuit detects a zero-crossing point.
Drawings
FIG. 1 is a block schematic diagram of an electromagnetic heating apparatus according to an embodiment of the present invention;
FIG. 2 is a block schematic diagram of an electromagnetic heating apparatus according to one embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an electromagnetic heating apparatus according to another embodiment of the present invention;
fig. 4 is a flowchart of a control method of an electromagnetic heating apparatus according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling an electromagnetic heating apparatus according to an embodiment of the present invention, from an operating state to a standby state, wherein the method is applied to a display panel;
fig. 6 is a flow chart of a control method of an electromagnetic heating device from an operating state to a standby state according to another embodiment of the present invention, wherein the control chip is applied;
fig. 7 is a flowchart of a control method of an electromagnetic heating apparatus according to an embodiment of the present invention, from a standby state to an operating state, wherein the control method is applied to a display panel; and
fig. 8 is a flowchart of a control method of an electromagnetic heating apparatus from a standby state to an operating state according to another embodiment of the present invention, wherein the control method is applied to a control chip.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An electromagnetic heating apparatus and a control method of the electromagnetic heating apparatus of the embodiments of the present invention are described below with reference to the drawings.
Fig. 1 is a block schematic diagram of an electromagnetic heating apparatus according to an embodiment of the present invention. As shown in fig. 1, an electromagnetic heating apparatus according to an embodiment of the present invention includes: the power supply comprises a first power supply input end V1, a second power supply input end V2, a first switch circuit 10, an input filter circuit 20, a resonant heating loop 30, a first rectifying module 40, a switch power supply module 50, a second switch circuit 60 and a control chip 70.
Wherein, ac power is input through the first power input terminal V1 and the second power input terminal V2, for example, the ac power may be 220V; a first terminal of the first switching circuit 10 is connected to the second power input terminal V2; the first input terminal 20a of the input filter circuit 20 is connected to the first power input terminal V1, the second input terminal 20b of the input filter circuit 20 is connected to the second terminal 10b of the first switch circuit 10, and the input filter circuit 20 is configured to filter the alternating current; the input end of the resonant heating circuit 30 is connected to the output end of the input filter circuit 20, and the resonant heating circuit 30 includes a power switch tube 31 and a driving circuit 32 for driving the power switch tube 31. The power switch tube 31 may be an IGBT (Insulated Gate Bipolar Transistor), and the driving circuit 32 may drive the power switch tube 31 to be turned on or off.
According to an embodiment of the present invention, a rectifier bridge 105 is provided between the input filter circuit 20 and the resonant heating circuit 30, and rectifies the filtered ac power output by the input filter circuit 20 and inputs the rectified dc power into the resonant heating circuit 30 to supply power to the resonant heating circuit 30.
The first input end 40a of the first rectifying module 40 is connected to the first power input end V1, the second input end 40b of the first rectifying module 40 is connected to the second power input end V2, and the first rectifying module 40 is configured to rectify the alternating current; the input end of the switching power supply module 50 is connected to the output end of the first rectifying module 40, the switching power supply module 50 has a first power supply output end 50a for providing a first preset power supply, and the switching power supply module 50 is configured to convert the rectified ac power to generate a first preset power supply; the first terminal 60a of the second switch circuit 60 is connected to the first power output terminal 50a of the switching power supply module 50, and the second terminal 60b of the second switch circuit 60 is connected to the power supply terminal of the driving circuit 32. Wherein, the voltage of the first preset power source may be + 18V.
According to an embodiment of the present invention, as shown in fig. 3, the first rectifying module 40 may include a first diode D1 and a second diode D2, wherein an anode of the first diode D1 is connected to the second power input terminal V2, an anode of the second diode D2 is connected to the first power input terminal V1, and a cathode of the second diode D2 is connected to the cathode of the first diode D1 and then to the input terminal of the switching power module 50.
The control chip 70 is connected to the control terminal 10K of the first switch circuit 10 and the control terminal 60K of the second switch circuit 60, respectively, and the control chip 70 is configured to obtain a standby signal and control the first switch circuit 10 and the second switch circuit 60 to be turned off when the standby signal is obtained.
Specifically, an alternating current is input into the electromagnetic heating device through the first power input end V1 and the second power input end V2, when the electromagnetic heating device heats normally, the control chip 70 controls the first switch circuit 10 to be closed and the second switch circuit 60 to be closed, at this time, the alternating current is filtered through the input filter circuit 20 and transmitted to the resonant heating circuit 30, the first rectifying module 40 rectifies the alternating current, the switching power supply module 50 converts the rectified alternating current into a first preset power supply to supply power to the driving circuit 32 in the resonant heating circuit 30, and the driving circuit 32 drives the power switch tube 31 to be turned on or turned off according to a control signal output by the control chip 70.
When the electromagnetic heating device is in standby, the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to be turned off, so that the input filter circuit 20 and the resonant heating circuit 30 are powered off.
Therefore, the electromagnetic heating device provided by the embodiment of the invention can cut off the input filter circuit and the drive circuit by disconnecting the first switch circuit and the second switch circuit when in standby, thereby effectively reducing the standby power consumption of the whole machine, ensuring that the standby power consumption of the whole machine conforms to CE authentication and ensuring the normal sale of the whole machine.
According to an embodiment of the present invention, as shown in fig. 2, the switching power supply module 50 further has a second power output terminal 50b for providing a second predetermined power, and the electromagnetic heating apparatus further includes a third switching circuit 80 and a display panel 90.
The first end 80a of the third switch circuit 80 is connected to the second power output end 50b of the switching power supply module 50, and the second end 80b of the third switch circuit 80 is connected to the power supply end 70D of the control chip 70; the power terminal 90D of the display panel 90 is connected to the second power output terminal 50b, the control terminal 90K of the display panel 90 is connected to the control terminal 80K of the third switch circuit 80, the display panel 90 communicates with the control chip 70, and the display panel 90 controls the third switch circuit 80 to be turned off after the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to be turned off.
Wherein, the second preset power voltage is +5V, the display panel 90 sends a standby instruction or a working instruction to the control chip 70 by a communication manner, and receives a feedback of completing standby sent by the control chip 70.
That is, the switching power supply module 50 may also convert the alternating current into a second preset power supply, which is supplied to the control chip 70 through the third switching circuit 80 when the electromagnetic heating apparatus is normally heated. When the electromagnetic heating device is in standby, after the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to be switched off, the display panel 90 controls the third switch circuit 80 to be switched off again, that is, after the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to be switched off, the power supply to the control chip 70 is stopped, so that the control chip 70 is powered off when in standby, and the standby power consumption of the electromagnetic heating device is further reduced.
According to an embodiment of the present invention, the display panel 90 is used for receiving a standby instruction and transmitting a standby signal to the control chip 70 when receiving the standby instruction.
It should be noted that the display panel 90 may determine that the standby instruction is received when the "standby" key is triggered, or may generate the standby instruction when the operation instruction of the user is not received within a preset time, or may determine that the standby instruction is received when a combination key composed of a plurality of keys is triggered in a preset manner.
That is, the display panel 90 transmits a standby signal to the control chip 70 when acquiring the standby instruction, the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to be turned off after acquiring the standby signal transmitted by the display panel 90, the control chip 70 transmits a completion standby flag to the display panel 90 after the first switch circuit 10 and the second switch circuit 60 are turned off, and the display panel 90 controls the third switch circuit 80 to be turned off after receiving the completion standby flag transmitted by the control chip 70.
According to an embodiment of the present invention, the display panel 90 is further configured to receive an operation instruction and control the third switch circuit 80 to close when receiving the operation instruction, and the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to close after the display panel 90 controls the third switch circuit 80 to close.
That is, after the electromagnetic heating device enters the alternating current, the display panel 90 may detect whether a work instruction of a user, for example, whether a cooking key is triggered, the display panel 90 controls the third switching circuit 80 to be closed when receiving the work instruction, that is, the switching power module 50 may supply power to the control chip 70 through the third switching circuit 80, the display panel 90 sends the work instruction to the control chip 70 after the control chip 70 is powered on, and the control chip 70 controls the first switching circuit 10 and the second switching circuit 60 to be closed after acquiring the work instruction sent by the display panel 90.
According to an embodiment of the present invention, as shown in fig. 3, the first switching circuit 10 of the electromagnetic heating apparatus may include a relay 11 and a relay driving circuit 12.
Wherein, the switch of the relay 11 is connected between the second power input terminal V2 and the second input terminal 20b of the input filter circuit 20, the input terminal of the relay driving circuit 12 is connected to the control chip 70 as the control terminal of the first switch circuit 10, and the output terminal of the relay driving circuit 12 is connected to the coil of the relay 11; the control chip 70 controls the switch of the relay 11 to be closed or opened through the relay driving circuit 12.
According to an embodiment of the present invention, as shown in fig. 3, the electromagnetic heating apparatus further includes a zero-crossing detection circuit 101, an input end of the zero-crossing detection circuit 101 is connected to an output end of the first rectification module 40, the zero-crossing detection circuit 101 is configured to detect a zero-crossing point, wherein the zero-crossing detection circuit 101 is further connected to the control chip 70, and the control chip 70 is configured to control the first switch circuit 10 to be turned on or off when the zero-crossing point is detected by the zero-crossing detection circuit 101.
That is, the zero-cross detection circuit 101 may detect a zero-cross point of the voltage of the alternating current, and send a zero-cross signal to the control chip 70 when detecting the zero-cross point, and after the control chip 70 acquires the standby signal sent by the display panel 90, the control chip controls the first switch circuit 10 and the second switch circuit 60 to be turned off when receiving the zero-cross point signal; after the control chip 70 acquires the working instruction sent by the display panel 90, when receiving the zero-crossing point signal, the control chip controls the first switch circuit 10 and the second switch circuit 60 to be closed, so that the impact of the alternating voltage on the relay is reduced, and the service life of the relay is prolonged.
Specifically, when the display panel 90 receives a standby instruction, the display panel 90 transmits a standby signal to the control chip 70, the control chip 70 determines whether a zero-crossing signal transmitted by the zero-crossing detection circuit 101 is received after receiving the standby signal, the control chip 70 controls the first and second switching circuits 10 and 60 to be turned off when receiving the zero-crossing signal, and transmits a completion standby flag to the display panel 90 after the first and second switching circuits 10 and 60 are turned off, and the display panel 90 controls the third switching circuit 80 to be turned off after receiving the completion standby flag transmitted by the control chip 70.
When the display panel 90 receives a working instruction, the display panel 90 controls the third switch circuit 80 to close to supply power to the control chip 70, the control chip 70 determines whether a zero-crossing signal sent by the zero-crossing detection circuit 101 is received after being powered on, and the control chip 70 controls the first switch circuit 10 and the second switch circuit 60 to close when receiving the zero-crossing signal.
According to an embodiment of the present invention, as shown in fig. 3, the electromagnetic heating apparatus may further include a surge detection circuit 102, a voltage detection circuit 103, and a second rectification module 104.
A first input end of the second rectifying module 104 is connected to the first power input end V1, a second input end of the second rectifying module 104 is connected to the second end 10b of the first switching circuit 10, an output end of the second rectifying module 104 is connected to the surge detecting circuit 102 and the voltage detecting circuit 103, respectively, and the second rectifying module 104 is configured to rectify an ac power to supply power to the surge detecting circuit 102 and the voltage detecting circuit 103.
According to an embodiment of the present invention, as shown in fig. 3, the second rectifying module 104 may include a third diode D3 and a fourth diode D4, wherein an anode of the third diode D3 is connected to the first power input terminal V1, an anode of the fourth diode D4 is connected to the second power input terminal V2, and a cathode of the fourth diode D4 is connected to a cathode of the third diode D3 and then connected to the surge detecting circuit 102 and the voltage detecting circuit 103.
Therefore, the surge detection circuit 102 and the voltage detection circuit 103 are separated from the zero-cross detection circuit 101 by the second rectifier module 104, and the surge detection circuit 102 and the voltage detection circuit 103 are connected to the rear end of the first switch circuit 10, so that the surge detection circuit 102 and the voltage detection circuit 103 are also controlled by the first switch circuit 10, and the standby power consumption is reduced.
That is to say, after the electromagnetic heating device enters the standby state, only the display panel 90 of the complete electromagnetic heating device is in the power-on state, and other circuits such as the resonant circuit, the surge detection circuit 102, the voltage detection circuit 103 and the like are powered off in the standby state, so that the standby power consumption of the complete electromagnetic heating device is effectively reduced, and the standby power consumption can be less than 0.2W in the actual test, thereby achieving the design expectation.
According to one embodiment of the present invention, the electromagnetic heating device may be an induction cooker, an electric rice cooker, an electromagnetic pressure cooker, an electromagnetic range, or the like.
In summary, according to the electromagnetic heating apparatus provided in the embodiment of the present invention, ac power is input through a first power input terminal and a second power input terminal, a first terminal of a first switch circuit is connected to the second power input terminal, a first input terminal and a second input terminal of an input filter circuit are respectively connected to the first power input terminal and a second terminal of the first switch circuit, the input filter circuit filters the ac power, an input terminal of a resonant heating circuit is connected to an output terminal of the input filter circuit, the resonant heating circuit includes a power switch and a driving circuit for driving the power switch, the first rectifying module rectifies the ac power, the switch power module converts the rectified ac power to generate a first preset power, a first terminal of a second switch circuit is connected to the first power output terminal of the switch power module, and a second terminal of the second switch circuit is connected to a power supply terminal of the driving circuit, the control chip acquires the standby signal and controls the first switch circuit and the second switch circuit to be switched off when the standby signal is acquired. Therefore, the first switch circuit and the second switch circuit are switched off in the standby state, so that the input filter circuit and the driving circuit are powered off, the standby power consumption of the whole machine is effectively reduced, the standby power consumption of the whole machine is ensured to meet CE authentication, and the normal sale of the whole machine is ensured.
Fig. 4 illustrates a control method of an electromagnetic heating apparatus according to an embodiment of the present invention. Wherein, the electromagnetic heating device comprises a first power input end, a second power input end, a first switch circuit, an input filter circuit, a resonant heating circuit, a first rectifying module, a switch power module, a second switch circuit and a control chip, wherein, the first end of the first switch circuit is connected with the second power input end, the first input end of the input filter circuit is connected with the first power input end, the second input end of the input filter circuit is connected with the second end of the first switch circuit, the input end of the resonant heating circuit is connected with the output end of the input filter circuit, the resonant heating circuit comprises a power switch tube and a driving circuit for driving the power switch tube, the first input end of the first rectifying module is connected with the first power input end, the second input end of the first rectifying module is connected with the second power input end, the input end of the switch power module is connected with the output end of the first rectifying module, the switching power supply module is provided with a first power supply output end for providing a first preset power supply, the first end of the second switching circuit is connected with the first power supply output end of the switching power supply module, and the second end of the second switching circuit is connected with the power supply end of the driving circuit, and the method comprises the following steps:
s1: the control chip acquires a standby signal.
S2: and the control chip controls the first switch circuit and the second switch circuit to be switched off when acquiring the standby signal.
Specifically, the electromagnetic heating device inputs alternating current through a first power input end and a second power input end, and when the first switch circuit is closed, the alternating current is filtered through the input filter circuit and is transmitted to the resonant heating loop; the first rectifying module rectifies alternating current, the switching power supply module converts the rectified alternating current into a first preset power supply and transmits the first preset power supply to the second switching circuit, and when the second switching circuit is closed, the driving circuit in the resonant heating loop drives the power switching tube to be switched on or switched off according to a driving signal; when the control chip acquires the standby signal, the control chip controls the first switch circuit and the second switch circuit to be disconnected, namely the input filter circuit and the resonant heating loop stop working.
Therefore, the electromagnetic heating method provided by the embodiment of the invention can cut off the input filter circuit and the drive circuit by disconnecting the first switch circuit and the second switch circuit when in standby, thereby effectively reducing the standby power consumption of the whole machine, ensuring that the standby power consumption of the whole machine conforms to CE authentication and ensuring the normal sale of the whole machine.
According to an embodiment of the present invention, the switching power module further has a second power output terminal for providing a second predetermined power, the electromagnetic heating apparatus further includes a third switching circuit and a display panel, a first terminal of the third switching circuit is connected to the second power output terminal of the switching power module, a second terminal of the third switching circuit is connected to a power terminal of the display chip, a power terminal of the display panel is connected to the second power output terminal, and the display panel is in communication with the control chip, the method further includes: the display panel controls the third switch circuit to be turned off after the control chip controls the first switch circuit and the second switch circuit to be turned off.
And the second preset power supply voltage is +5V, and the display panel sends a standby signal or a working instruction to the control chip in a communication mode and receives standby feedback sent by the control chip for completing standby.
That is, the switching power supply module may further convert the alternating current into a second preset power supply, and the second preset power supply is supplied to the control chip through the third switching circuit when the electromagnetic heating device is normally heated. When the electromagnetic heating device is in standby, after the control chip controls the first switch circuit and the second switch circuit to be disconnected, the display panel controls the third switch circuit to be disconnected, namely, the control chip stops supplying power to the control chip after controlling the first switch circuit and the second switch circuit to be disconnected, so that the control chip is powered off in standby, and the standby power consumption of the electromagnetic heating device is further reduced.
According to an embodiment of the present invention, the control method of the electromagnetic heating apparatus further includes: the display panel receives the standby instruction, and sends a standby signal to the control chip when receiving the standby instruction.
That is to say, the display panel sends a standby signal to the control chip when acquiring the standby instruction, the control chip controls the first switch circuit and the second switch circuit to be switched off after acquiring the standby signal sent by the display panel, the control chip sends a completion standby mark to the image-like plate after the first switch circuit and the second switch circuit are switched off, and the display panel controls the third switch circuit to be switched off after receiving the completion standby mark sent by the control chip.
According to an embodiment of the present invention, the control method of the electromagnetic heating apparatus further includes: the display panel receives the working instruction and controls the third switch circuit to be closed when the working instruction is received, and the control chip controls the first switch circuit and the second switch circuit to be closed after the display panel controls the third switch circuit to be closed.
That is to say, after the electromagnetic heating device enters the alternating current, the display panel can detect whether a work instruction of a user, such as whether a cooking key is triggered, the display panel controls the third switch circuit to be closed when receiving the work instruction, that is, the switch power module can supply power to the control chip through the third switch circuit, the display panel sends the work instruction to the control chip after the control chip is powered on, and the control chip controls the first switch circuit and the second switch circuit to be closed after acquiring the work instruction sent by the display panel.
According to an embodiment of the present invention, the electromagnetic heating apparatus further includes a zero-crossing detection circuit, an input terminal of the zero-crossing detection circuit is connected to an output terminal of the first rectification module, and the control method further includes: and the control chip controls the first switch circuit to be closed or closed when the zero-crossing detection circuit detects a zero-crossing point.
That is to say, the zero-crossing detection circuit can detect the voltage zero-crossing point of the alternating current and send the zero-crossing signal to the control chip when detecting the zero-crossing point, and after the control chip obtains the standby instruction sent by the display panel, the control chip controls the first switching circuit and the second switching circuit to be switched off when receiving the zero-crossing point signal; after the control chip acquires a working instruction sent by the display panel, the first switch circuit and the second switch circuit are controlled to be closed when a zero crossing point signal is received, so that the impact of alternating voltage on the relay is reduced, and the service life of the relay is prolonged.
Specifically, when the display panel receives a standby instruction, the display panel sends the standby instruction to the control chip, the control chip judges whether a zero-crossing signal sent by the zero-crossing detection circuit is received or not after receiving the standby instruction, the control chip controls the first switch circuit and the second switch circuit to be disconnected when receiving the zero-crossing signal, sends a standby completion flag to the display panel after the first switch circuit and the second switch circuit are disconnected, and the display panel controls the third switch circuit to be disconnected after receiving the standby completion flag sent by the control chip.
When the display panel receives a working instruction, the display panel controls the third switch circuit to be closed to supply power to the control chip, the control chip judges whether a zero-crossing signal sent by the zero-crossing detection circuit is received or not after being electrified, and the control chip controls the first switch circuit and the second switch circuit to be closed when receiving the zero-crossing signal.
According to an embodiment of the present invention, as shown in fig. 5, when the electromagnetic heating apparatus enters the standby state, the control method applied to the display panel side includes the steps of:
s101: and judging whether a standby instruction is acquired.
If yes, executing step S102; if not, return to step S101.
S102: the display panel sends a standby signal to the control chip.
S103: and judging whether the feedback of finishing the standby state sent by the control chip is received. For example, a completion standby flag sent by the control chip.
If yes, executing step S104; if not, return to step S103.
S104: the display panel controls the third switch circuit to be turned off to turn off the power supply to the control chip.
S105: the electromagnetic heating device enters a standby state.
According to an embodiment of the present invention, as shown in fig. 6, when the electromagnetic heating device enters the standby state, the control method applied to the control chip side includes the following steps:
s201: and judging whether a standby signal sent by the display panel is received or not.
If yes, go to step S202; if not, return to step S201.
S202: and judging whether a zero-crossing signal is received.
If yes, go to step S203; if not, return to step S202.
S203: the control chip controls the first switch circuit and the second switch circuit to be disconnected.
S204: the control chip sends feedback of completing the standby state to the display panel. For example, a completion standby flag is sent to the display panel.
According to an embodiment of the present invention, as shown in fig. 7, when the electromagnetic heating apparatus enters the operating state, the control method applied to the display panel side includes the steps of:
s301: and judging whether a work instruction is received. For example, there is a cooking key that is activated by the user.
If yes, go to step S302; if not, return to step S301.
S302: the display panel controls the third switch circuit to be closed to supply power to the control chip.
S303: the display panel sends a working instruction to the control chip.
S304: the electromagnetic heating device enters a working state.
According to an embodiment of the present invention, as shown in fig. 8, when the electromagnetic heating device enters the working state, the control method applied to the control chip side includes the following steps:
s401: and judging whether a work instruction sent by the display panel is received. If yes, go to step S402; if not, return to step S401.
S402: and judging whether a zero-crossing signal is received. If so, go to step S403; if not, return to step S402.
S403: the control chip controls the first switch circuit and the third switch circuit to be closed.
S404: the electromagnetic heating device enters a working state.
In summary, according to the control method of the electromagnetic heating apparatus provided in the embodiment of the present invention, the control chip obtains the standby signal, and controls the first switch circuit and the second switch circuit to be turned off when the standby signal is obtained. Therefore, the control method of the embodiment of the invention can cut off the power of the input filter circuit and the drive circuit by disconnecting the first switch circuit and the second switch circuit when in standby, thereby effectively reducing the standby power consumption of the whole machine, ensuring that the standby power consumption of the whole machine conforms to CE authentication and ensuring the normal sale of the whole machine.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
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; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. An electromagnetic heating device, comprising:
a first power input terminal and a second power input terminal through which an alternating current is input;
a first switch circuit, a first end of the first switch circuit being connected to the second power input terminal;
a first input end of the input filter circuit is connected with the first power supply input end, a second input end of the input filter circuit is connected with a second end of the first switch circuit, and the input filter circuit is used for filtering the alternating current;
the input end of the resonant heating loop is connected with the output end of the input filter circuit, and the resonant heating loop comprises a power switch tube and a driving circuit for driving the power switch tube;
a first input end of the first rectifying module is connected with the first power input end, a second input end of the first rectifying module is connected with the second power input end, and the first rectifying module is used for rectifying the alternating current;
the input end of the switching power supply module is connected with the output end of the first rectifying module, the switching power supply module is provided with a first power supply output end for providing a first preset power supply, and the switching power supply module is used for converting rectified alternating current to generate the first preset power supply;
a first end of the second switch circuit is connected with the first power output end of the switch power supply module, and a second end of the second switch circuit is connected with a power supply end of the driving circuit;
and the control chip is respectively connected with the control end of the first switch circuit and the control end of the second switch circuit, and is used for acquiring a standby signal and controlling the first switch circuit and the second switch circuit to be switched off when the standby signal is acquired.
2. An electromagnetic heating device as claimed in claim 1, wherein the switching power supply module further has a second power supply output terminal for providing a second predetermined power supply, the device further comprising:
a first end of the third switch circuit is connected with a second power output end of the switch power supply module, and a second end of the third switch circuit is connected with a power supply end of the control chip;
and the power supply end of the display panel is connected with the second power supply output end, the control end of the display panel is connected with the control end of the third switch circuit, the display panel is communicated with the control chip, and the display panel controls the third switch circuit to be switched off after the control chip controls the first switch circuit and the second switch circuit to be switched off.
3. The electromagnetic heating apparatus according to claim 2, wherein the display panel is configured to receive a standby instruction and send a standby signal to the control chip when receiving the standby instruction.
4. Electromagnetic heating device according to claim 2,
the display panel is also used for receiving a working instruction and controlling the third switch circuit to be closed when the working instruction is received;
the control chip is further used for controlling the first switch circuit and the second switch circuit to be closed after the display panel controls the third switch circuit to be closed.
5. The electromagnetic heating apparatus according to claim 1, wherein the first switching circuit comprises:
a switch of the relay is connected between the second power input end and the second input end of the input filter circuit;
the input end of the relay driving circuit is used as the control end of the first switch circuit and is connected with the control chip, and the output end of the relay driving circuit is connected with the coil of the relay;
the control chip controls the switch of the relay to be switched on or switched off through the relay driving circuit.
6. The electromagnetic heating apparatus according to any one of claims 1 to 5, characterized by further comprising:
the input end of the zero-crossing detection circuit is connected with the output end of the first rectifying module, and the zero-crossing detection circuit is used for detecting a zero crossing point;
the zero-crossing detection circuit is further connected with the control chip, and the control chip is used for controlling the first switch circuit to be switched on or switched off when the zero-crossing detection circuit detects a zero crossing point.
7. The electromagnetic heating apparatus according to claim 1, further comprising:
a surge detection circuit;
a voltage detection circuit;
and a first input end of the second rectifying module is connected with the first power input end, a second input end of the second rectifying module is connected with a second end of the first switching circuit, an output end of the second rectifying module is respectively connected with the surge detection circuit and the voltage detection circuit, and the second rectifying module is used for rectifying the alternating current to supply power for the surge detection circuit and the voltage detection circuit.
8. The electromagnetic heating device according to claim 1, wherein the electromagnetic heating device is an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an electromagnetic range.
9. A control method of an electromagnetic heating device is characterized in that the electromagnetic heating device comprises a first power input end, a second power input end, a first switch circuit, an input filter circuit, a resonant heating circuit, a first rectification module, a switch power module, a second switch circuit and a control chip, wherein the first end of the first switch circuit is connected with the second power input end, the first input end of the input filter circuit is connected with the first power input end, the second input end of the input filter circuit is connected with the second end of the first switch circuit, the input end of the resonant heating circuit is connected with the output end of the input filter circuit, the resonant heating circuit comprises a power switch tube and a driving circuit for driving the power switch tube, the first input end of the first rectification module is connected with the first power input end, the second input end of the first rectifying module is connected with the second power input end, the input end of the switching power supply module is connected with the output end of the first rectifying module, the switching power supply module is provided with a first power output end for providing a first preset power supply, the first end of the second switching circuit is connected with the first power output end of the switching power supply module, and the second end of the second switching circuit is connected with the power supply end of the driving circuit, and the method comprises the following steps:
the control chip acquires a standby signal;
and the control chip controls the first switch circuit and the second switch circuit to be switched off when the control chip acquires a standby signal.
10. A method for controlling an electromagnetic heating apparatus according to claim 9, wherein said switching power supply module further has a second power supply output terminal for supplying a second predetermined power supply, said electromagnetic heating apparatus further comprises a third switching circuit, a first terminal of said third switching circuit being connected to said second power supply output terminal of said switching power supply module, a second terminal of said third switching circuit being connected to a power supply terminal of said control chip, and a display panel, a power supply terminal of said display panel being connected to said second power supply output terminal, said display panel being in communication with said control chip, said method further comprising:
the display panel controls the third switch circuit to be turned off after the control chip controls the first switch circuit and the second switch circuit to be turned off.
11. The control method of an electromagnetic heating apparatus according to claim 10,
the display panel receives a standby instruction;
and the display panel sends a standby signal to the control chip when receiving a standby instruction.
12. The control method of an electromagnetic heating apparatus according to claim 10,
the display panel receives a working instruction and controls the third switch circuit to be closed when receiving the working instruction;
the control chip controls the first switch circuit and the second switch circuit to be closed after the display panel controls the third switch circuit to be closed.
13. A control method of an electromagnetic heating apparatus according to any one of claims 9-12, characterized in that the electromagnetic heating apparatus further comprises a zero-crossing detection circuit, an input of which is connected to an output of the first rectification module, the method further comprising:
and the control chip controls the first switch circuit to be switched on or switched off when the zero-crossing detection circuit detects a zero-crossing point.
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| CN201810317093.9A CN110366282B (en) | 2018-04-10 | 2018-04-10 | Electromagnetic heating device and control method thereof |
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