CN109511187B - Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device - Google Patents
Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device Download PDFInfo
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- CN109511187B CN109511187B CN201710828185.9A CN201710828185A CN109511187B CN 109511187 B CN109511187 B CN 109511187B CN 201710828185 A CN201710828185 A CN 201710828185A CN 109511187 B CN109511187 B CN 109511187B
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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
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- H05B6/06—Control, e.g. of temperature, of power
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Abstract
The invention discloses an electromagnetic heating device and a control circuit and a method for reducing standby power consumption of the electromagnetic heating device, wherein the control circuit comprises: the controllable switch unit is connected between the input end of the filtering unit and the alternating current power supply; the input end of the first rectifying unit is connected with the input end of the filtering unit, and the output end of the first rectifying unit is respectively connected with the surge detection unit and the voltage detection unit; the controllable switch control circuit is used for controlling the on or off of the controllable switch unit; and the control unit is used for controlling the electromagnetic heating device according to the surge signal detected by the surge detection unit and the voltage signal of the alternating current power supply detected by the voltage detection unit, outputting a turn-off signal to the controllable switch control circuit when a standby instruction is received, and controlling the controllable switch unit to be turned off so as to power off the filter unit, the rectifier bridge, the first rectifier unit, the surge detection unit and the voltage detection unit, thereby effectively reducing the standby power consumption of the electromagnetic heating device.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a control circuit for reducing standby power consumption of an electromagnetic heating device, an electromagnetic heating device and a control method for reducing standby power consumption of the electromagnetic heating device.
Background
At present, the schematic diagram of the circuit on the alternating current side of the electromagnetic heating device is generally shown in fig. 1. As shown in fig. 1, in a standby state of the electromagnetic heating device, the EMC filter circuit, the surge detection circuit, the zero-cross detection circuit and the voltage detection circuit, which are composed of the filter capacitor and the inductor, are in a powered-on state, the power consumption of the EMC filter circuit is about 0.1-0.2W in standby, which is generally related to the capacitance value of the filter capacitor, and the standby power consumption of the surge detection circuit, the zero-cross detection circuit and the voltage detection circuit is about 0.1W when the capacitance value is larger and the standby power consumption is larger.
For the electromagnetic heating device which needs to enter the european market, CE (unified european) certification has a stricter requirement on standby power consumption, and the current scheme may have a problem that the standby power consumption exceeds the standard.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. To this end, an object of the present invention is to provide a control circuit for reducing standby power consumption of an electromagnetic heating device, which can control a filtering unit, a rectifying bridge, and a first rectifying unit, a surge detecting unit, and a voltage detecting unit to be powered off when the electromagnetic heating device is in standby, so that standby power consumption of the electromagnetic heating device can be effectively reduced.
A second object of the present invention is to provide an electromagnetic heating device.
A third object of the present invention is to provide a method for controlling standby power consumption of an electromagnetic heating device.
In order to achieve the above object, a first embodiment of the present invention provides a control circuit for reducing standby power consumption of an electromagnetic heating device, where the electromagnetic heating device includes a filtering unit, a rectifying bridge, a surge detecting unit, and a voltage detecting unit, an output end of the filtering unit is connected to the rectifying bridge, and the control circuit includes: the controllable switch unit is connected between the input end of the filtering unit and an alternating current power supply; the input end of the first rectifying unit is connected with the input end of the filtering unit, and the output end of the first rectifying unit is respectively connected with the surge detection unit and the voltage detection unit; the controllable switch control circuit is connected with the controllable switch unit to control the on or off of the controllable switch unit; the control unit, the control unit respectively with controllable switch control circuit surge detecting element with voltage detection unit links to each other, the control unit is used for according to surge signal that surge detecting element detected with voltage detection unit's alternating current power supply's voltage signal is right electromagnetic heating device controls to output turn-off signal extremely when receiving standby instruction controllable switch control circuit, in order to control controllable switch unit shuts off, so that the filter unit rectifier bridge and first rectifier unit surge detecting element with voltage detection unit cuts off the power supply.
According to the control circuit for reducing the standby power consumption of the electromagnetic heating device, the electromagnetic heating device can be controlled according to the surge signal detected by the surge detection unit and the voltage signal of the alternating current power supply detected by the voltage detection unit, and the shutdown signal is output to the controllable switch control circuit when the standby instruction is received so as to control the controllable switch unit to be turned off, so that the filtering unit, the rectifying bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off, and the standby power consumption of the electromagnetic heating device can be reduced.
In addition, the control circuit for reducing standby power consumption of an electromagnetic heating device according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the controllable switch unit is a relay unit, and the controllable switch control circuit is a relay control circuit, wherein the relay unit includes a switch and a coil, one end of the switch is connected to one end of the ac power supply, the other end of the switch is connected to one input end of the filter unit and one input end of the first rectifier unit, the other input end of the first rectifier unit is connected to the other input end of the filter unit and then to the other end of the ac power supply, one end of the coil is connected to one end of the relay control circuit, the other end of the coil is connected to the other end of the relay control circuit, and the relay control circuit controls the on or off of the switch by controlling whether the coil is energized.
According to an embodiment of the present invention, the above control circuit for reducing standby power consumption of an electromagnetic heating device further includes: the input end of the second rectifying unit is connected with the alternating current power supply, and the second rectifying unit is used for rectifying alternating current provided by the alternating current power supply and outputting pulsating direct current; and one end of the zero-crossing detection unit is connected with the output end of the second rectification unit, the other end of the zero-crossing detection unit is connected with the control unit, and the zero-crossing detection unit outputs a zero-crossing detection signal to the control unit by detecting the zero crossing point of the pulsating direct current, so that the control unit controls the controllable switch unit to be switched on or switched off through the controllable switch control circuit at the zero crossing point.
According to an embodiment of the present invention, the second rectifying unit includes: the anode of the first diode is connected with one end of the alternating current power supply, the anode of the second diode is connected with the other end of the alternating current power supply, and the cathode of the first diode is connected with the cathode of the second diode and then serves as the output end of the second rectifying unit.
According to an embodiment of the present invention, the first rectifying unit includes: the anode of the third diode is connected with the other end of the switch, the anode of the fourth diode is connected with the other end of the alternating current power supply, and the cathode of the third diode is connected with the cathode of the fourth diode and then serves as the output end of the first rectifying unit.
According to one embodiment of the present invention, the relay control circuit includes: one end of the first resistor is connected with the control unit, a base electrode of the first triode is connected with the other end of the first resistor, and an emitting electrode of the first triode is grounded; the first capacitor is connected between the base electrode and the emitting electrode of the first triode; the anode of the fifth diode is respectively connected with the collector of the first triode and one end of the coil, and the cathode of the fifth diode is connected with the other end of the coil; and one end of the second resistor is connected with the cathode of the fifth diode, and the other end of the second resistor is connected with a preset power supply.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides an electromagnetic heating apparatus, including the control circuit for reducing standby power consumption of the electromagnetic heating apparatus according to the embodiment of the first aspect of the present invention.
According to the electromagnetic heating device provided by the embodiment of the invention, through the control circuit for reducing the standby power consumption of the electromagnetic heating device, the control can be carried out according to the surge signal detected by the surge detection unit and the voltage signal of the alternating current power supply detected by the voltage detection unit, and the turn-off signal is output to the controllable switch control circuit when the standby instruction is received so as to control the controllable switch unit to be turned off, so that the filtering unit, the rectifying bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off, and the standby power consumption can be effectively reduced.
In order to achieve the above object, a third embodiment of the present invention provides a control method for reducing standby power consumption of an electromagnetic heating device, including the following steps: judging whether a standby instruction is received or not; if the standby instruction is received, a turn-off signal is output to the controllable switch control circuit to control the controllable switch unit to be turned off, so that the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off.
According to the control method for reducing the standby power consumption of the electromagnetic heating device, when a standby instruction is received, a turn-off signal can be output to the controllable switch control circuit to control the controllable switch unit to be turned off, so that the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off, and the standby power consumption of the electromagnetic heating device can be reduced.
In addition, the control method for reducing the standby power consumption of the electromagnetic heating device according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the control method for reducing standby power consumption of an electromagnetic heating apparatus further includes: and detecting the zero crossing point of the alternating current power supply so as to control the controllable switch unit to be switched off according to the zero crossing point of the alternating current power supply when the standby instruction is received.
According to an embodiment of the present invention, the controllable switch unit is a relay unit, and the controllable switch control circuit is a relay control circuit, wherein the relay unit includes a switch and a coil, one end of the switch is connected to one end of the ac power supply, the other end of the switch is connected to one input end of the filter unit and one input end of the first rectifier unit, the other input end of the first rectifier unit is connected to the other input end of the filter unit and then to the other end of the ac power supply, one end of the coil is connected to one end of the relay control circuit, the other end of the coil is connected to the other end of the relay control circuit, and the relay control circuit controls the on or off of the switch by controlling whether the coil is energized.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which,
fig. 1 is a schematic circuit diagram of an ac side of a related art electromagnetic heating apparatus;
FIG. 2 is a block schematic diagram of a control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to one embodiment of the present invention;
FIG. 3 is a block schematic diagram of a control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to another embodiment of the present invention;
FIG. 4 is a circuit topology diagram of a relay control circuit according to one embodiment of the invention; and
fig. 5 is a flowchart of a control method for reducing standby power consumption of an electromagnetic heating apparatus according to an embodiment of the present invention.
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.
The following describes a control circuit for reducing standby power consumption of an electromagnetic heating device, and a control method for reducing standby power consumption of an electromagnetic heating device according to embodiments of the present invention with reference to the drawings.
Fig. 2 is a block schematic diagram of a control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to one embodiment of the present invention. As shown in fig. 2, the electromagnetic heating apparatus includes: the device comprises a filtering unit 10, a rectifier bridge 20, a surge detection unit 30 and a voltage detection unit 40, wherein the output end of the filtering unit 10 is connected with the rectifier bridge 20; the control circuit includes: controllable switching unit 50, first rectifying unit 60, controllable switching control circuit 70 and control unit 80.
Wherein the controllable switching unit 50 is connected between the input of the filtering unit 10 and the alternating current power source AC. An input terminal of the first rectifying unit 60 is connected to an input terminal of the filtering unit 10, and an output terminal of the first rectifying unit 60 is connected to the surge detecting unit 30 and the voltage detecting unit 40, respectively. A controllable switch control circuit 70 is connected to the controllable switch unit 50 to control the switching on or off of the controllable switch unit 50. The control unit 80 is respectively connected to the controllable switch control circuit 70, the surge detection unit 30 and the voltage detection unit 40, and the control unit 80 is configured to control the electromagnetic heating device according to the surge signal detected by the surge detection unit 30 and the voltage signal of the AC power supply AC detected by the voltage detection unit 40, and output a shutdown signal to the controllable switch control circuit 70 when receiving a standby instruction, so as to control the controllable switch unit 50 to be turned off, so as to power off the filtering unit 10, the rectifier bridge 20, and the first rectifying unit 60, the surge detection unit 30 and the voltage detection unit 40.
Specifically, the filtering unit 10 may be composed of a capacitor and an inductor, and the filtering unit 10 may perform filtering processing on the alternating current output by the alternating current power source AC to remove spikes in the waveform. The first rectifying unit 60 may rectify alternating current output from the alternating current power AC to output pulsating direct current, the surge detecting unit 30 may detect the pulsating direct current output from the first rectifying unit 60 in real time and generate a surge signal to determine whether surge voltage or surge current occurs in the alternating current power AC, and the voltage detecting unit 40 may detect the pulsating direct current output from the first rectifying unit 60 in real time and generate a voltage signal to determine whether overvoltage occurs in the alternating current power AC. The control unit 80 may control the electromagnetic heating device according to the surge signal and the voltage signal, for example, when the control unit 80 determines that the AC power AC has a surge voltage or a surge current according to the surge signal, the electromagnetic heating device is controlled to trigger surge protection, and when the control unit 80 determines that the AC power AC has an overvoltage according to the voltage signal, the electromagnetic heating device is controlled to trigger overvoltage protection. In addition, the control unit 80 may further output a shutdown signal to the controllable switch control circuit 70 when receiving the standby instruction, and the switch control circuit 70 may control the controllable switch unit 50 to be turned off when receiving the shutdown signal, so that the filtering unit 10, the rectifier bridge 20, the first rectifying unit 60, the surge detecting unit 30, and the voltage detecting unit 40 may be powered off, thereby greatly reducing the standby power consumption of the electromagnetic heating apparatus.
Further, in the embodiment of the present invention, as shown in fig. 3, the controllable switch unit 50 may be a relay unit, and the controllable switch control circuit 70 may be a relay control circuit, where the relay unit includes a switch K and a coil L, one end of the switch K is connected to one end of the alternating current power supply AC, the other end of the switch K is connected to one input end of the filtering unit 10 and one input end of the first rectifying unit 60, the other input end of the first rectifying unit 60 is connected to the other end of the alternating current power supply AC after being connected to the other input end of the filtering unit 10, one end of the coil L is connected to one end of the relay control circuit 70, the other end of the coil L is connected to the other end of the relay control circuit 70, and the relay control circuit 70 controls the on or off of the switch K by controlling whether the coil L is energized.
Specifically, when the coil L is energized, K is closed, and when the coil L is de-energized, K is open. The control unit 80 can control the on/off of the switch K by controlling whether the controllable switch control circuit 70 turns on or off to control whether the coil L is powered on.
According to an embodiment of the present invention, as shown in fig. 3, the control circuit for reducing standby power consumption of the electromagnetic heating apparatus may further include: a second rectifying unit 90 and a zero-crossing detecting unit 100.
The input end of the second rectifying unit 90 is connected to the alternating current power supply AC, and the second rectifying unit 90 is configured to rectify the alternating current provided by the alternating current power supply AC and output a pulsating direct current. One end of the zero-cross detection unit 100 is connected to the output end of the second rectification unit 90, the other end of the zero-cross detection unit 100 is connected to the control unit 80, and the zero-cross detection unit 100 outputs a zero-cross detection signal to the control unit 80 by detecting a zero-cross point of the pulsating direct current, so that the control unit 80 controls the controllable switch unit 80 to be turned on or off through the controllable switch control circuit 70 at the zero-cross point.
Specifically, if the elastic sheet at the strong power end of the relay is suddenly closed or opened under the condition that the elastic sheet is not at the zero point of the sine wave, the damages such as sparking, arc discharge and the like can be caused, and certain potential safety hazards exist. Therefore, the zero-cross detection unit 100 may output the zero-cross detection signal to the control unit 80 by detecting a zero-cross point of the pulsating direct current, and when K needs to be turned on or off, the control unit 80 may control K to be turned on or off at the zero-cross point according to the zero-cross signal. Therefore, the service life of the relay unit can be prolonged, and the safety of the circuit can be improved.
Further, according to an embodiment of the present invention, as shown in fig. 3, the second rectification unit 90 may include: a first diode D1 and a second diode D2, wherein the anode of the first diode D1 is connected to one end of the AC power source AC, the anode of the second diode D2 is connected to the other end of the AC power source AC, and the cathode of the first diode D1 is connected to the cathode of the second diode D2 to serve as the output terminal of the second rectifying unit 90.
As shown in fig. 3, the first rectification unit 60 may include: the anode of the third diode D3 is connected to the other end of the switch K, the anode of the fourth diode D4 is connected to the other end of the alternating current power supply AC, and the cathode of the third diode D3 is connected to the cathode of the fourth diode D4 and then serves as the output end of the first rectifying unit 60.
Specifically, the first rectifying unit 60 may output pulsating direct current to the surge detecting unit 30 and the voltage detecting unit 40 after full-wave rectifying the alternating current output from the alternating current power source AC. The second rectifying unit 90 may output pulsating direct current to the zero-cross detecting unit 100 after full-wave rectifying the alternating current output from the alternating current power source AC.
In the present invention, as shown in fig. 3, a fuse R may be further disposed between the other input end of the filtering unit 10 and the other end of the AC power source AC, and the fuse R may be blown out when the circuit is over-current, so as to control the circuit to be powered off, thereby improving safety.
According to an embodiment of the present invention, as shown in fig. 4, the relay control circuit, i.e., the controllable switch control circuit 70, may include: the circuit comprises a first resistor R1, a first triode Q1, a first capacitor C1, a fifth diode D5 and a second resistor R2.
One end of the first resistor R1 is connected to the control unit 80. The base of the first transistor Q1 is connected to the other end of the first resistor R1, and the emitter of the first transistor Q1 is grounded. The first capacitor C1 is connected between the base and emitter of the first transistor Q1. An anode of the fifth diode D5 is connected to a collector of the first transistor Q1 and one end of the coil L, respectively, and a cathode of the fifth diode D5 is connected to the other end of the coil L. One end of the second resistor R2 is connected to the cathode of the fifth diode D5, and the other end of the second resistor R2 is connected to the predetermined power VCC. The size of the preset power source VCC can be preset according to actual conditions.
Specifically, as shown in fig. 4, the first resistor R1 may function as a current limiting function, and the fifth diode D5 may function as a freewheeling diode and may function to suppress absorption of the back electromotive force. When K needs to be controlled to be closed, the control unit 80 can output a high level signal to the base of the first triode Q1 through the R1, when the base of the Q1 is at a high level, the Q1 is conducted, the coil L is electrified, and K is closed. When KD is required to be controlled to be disconnected, the control unit 80 can output a low level signal to the base of the first triode Q1 through R1, and when the base of Q1 is at a low level, Q1 is turned off, the coil L loses power, and K is disconnected.
It is understood that in the practice of the present invention, the electromagnetic heating device may be an induction cooker.
In summary, according to the control circuit for reducing standby power consumption of an electromagnetic heating device in the embodiments of the present invention, the electromagnetic heating device may be controlled according to the surge signal detected by the surge detecting unit and the voltage signal of the ac power supply detected by the voltage detecting unit, and when a standby instruction is received, a turn-off signal is output to the controllable switch control circuit to control the controllable switch unit to turn off, so that the filtering unit, the rectifying bridge, the first rectifying unit, the surge detecting unit, and the voltage detecting unit are powered off, thereby effectively reducing standby power consumption of the electromagnetic heating device. And the control unit can control the controllable switch unit to be switched on or switched off at the zero-crossing point according to the zero-crossing signal, so that the service life of the relay unit can be prolonged, and the safety of the circuit can be improved.
The embodiment of the invention also provides an electromagnetic heating device which comprises the control circuit for reducing the standby power consumption of the electromagnetic heating device.
According to the electromagnetic heating device provided by the embodiment of the invention, through the control circuit for reducing the standby power consumption of the electromagnetic heating device, the control can be carried out according to the surge signal detected by the surge detection unit and the voltage signal of the alternating current power supply detected by the voltage detection unit, and the turn-off signal is output to the controllable switch control circuit when the standby instruction is received so as to control the controllable switch unit to be turned off, so that the filtering unit, the rectifying bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off, and the standby power consumption can be effectively reduced.
Based on the electromagnetic heating device, the embodiment of the invention also provides a control method for reducing the standby power consumption of the electromagnetic heating device.
Fig. 5 is a flowchart of a control method for reducing standby power consumption of an electromagnetic heating apparatus according to an embodiment of the present invention. As shown in fig. 5, the control method may include the steps of:
s1, it is determined whether or not a standby command is received.
And S2, if the standby instruction is received, outputting a turn-off signal to the controllable switch control circuit to control the controllable switch unit to turn off so as to power off the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit.
Specifically, when a standby instruction is received, a turn-off signal is output to the controllable switch control circuit, and the controllable switch unit can be controlled to be turned off by the switch control circuit when the turn-off signal is received, so that the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit can be powered off, and the standby power consumption of the electromagnetic heating device is greatly reduced.
According to an embodiment of the present invention, the above control method for reducing standby power consumption of an electromagnetic heating apparatus may further include: and detecting the zero crossing point of the alternating current power supply so as to control the controllable switch unit to be switched off according to the zero crossing point of the alternating current power supply when receiving the standby instruction.
Specifically, if the elastic sheet at the strong power end of the relay is suddenly closed or opened under the condition that the elastic sheet is not at the zero point of the sine wave, the damages such as sparking, arc discharge and the like can be caused, and certain potential safety hazards exist. Therefore, the zero-crossing detection unit can output the zero-crossing signal, and when the controllable switching unit needs to be switched on or switched off, the controllable switching unit can be controlled to be switched on or switched off at the zero-crossing point according to the zero-crossing signal. Therefore, the service life of the controllable switch unit can be prolonged, and the safety of the circuit can be improved.
In an embodiment of the present invention, as shown in fig. 3, the controllable switch unit may be a relay unit, and the controllable switch control circuit is a relay control circuit, where the relay unit includes a switch and a coil, one end of the switch is connected to one end of the ac power supply, the other end of the switch is connected to one input end of the filtering unit and one input end of the first rectifying unit, the other input end of the first rectifying unit is connected to the other input end of the filtering unit and then connected to the other end of the ac power supply, one end of the coil is connected to one end of the relay control circuit, the other end of the coil is connected to the other end of the relay control circuit, and the relay control circuit controls the on or off of the switch by controlling whether the coil is energized.
Specifically, when the coil is energized, the switch is closed, and when the coil is de-energized, the switch is open. The switch can be controlled to be switched on or off by controlling whether the controllable switch control circuit is switched on or not and controlling whether the coil is electrified or not.
It should be noted that, the control method for reducing the standby power consumption of the electromagnetic heating apparatus according to the embodiment of the present invention is based on the electromagnetic heating apparatus described in the foregoing embodiment, and details not disclosed in this embodiment may specifically refer to the foregoing embodiment, and are not described herein again in order to reduce redundancy.
In summary, according to the control method for reducing the standby power consumption of the electromagnetic heating device in the embodiment of the invention, when the standby instruction is received, the turn-off signal is output to the controllable switch control circuit to control the controllable switch unit to turn off, so that the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off, and the standby power consumption of the electromagnetic heating device can be reduced. And the controllable switch unit can be controlled to be switched on or switched off at the zero-crossing point according to the zero-crossing signal, so that the service life of the controllable switch unit can be prolonged, and the safety of the circuit can be improved.
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 device or element must have a particular orientation, be constructed and operated in a particular orientation, and are 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined 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; either directly or indirectly through intervening media, either internally or in any other relationship. 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 (8)
1. The utility model provides a control circuit for reducing electromagnetic heating device stand-by power consumption which characterized in that, electromagnetic heating device includes filtering unit, rectifier bridge, surge detecting element and voltage detection unit, filtering unit's output with the rectifier bridge links to each other, control circuit includes:
the controllable switch unit is connected between the input end of the filtering unit and an alternating current power supply;
the input end of the first rectifying unit is connected with the input end of the filtering unit, and the output end of the first rectifying unit is respectively connected with the surge detection unit and the voltage detection unit;
the controllable switch control circuit is connected with the controllable switch unit to control the on or off of the controllable switch unit;
the control unit is used for controlling the electromagnetic heating device according to a surge signal detected by the surge detection unit and a voltage signal of an alternating current power supply detected by the voltage detection unit, and outputting a turn-off signal to the controllable switch control circuit when a standby instruction is received so as to control the controllable switch unit to be turned off, so that the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit are powered off;
the input end of the second rectifying unit is connected with the alternating current power supply, and the second rectifying unit is used for rectifying alternating current provided by the alternating current power supply and outputting pulsating direct current;
and one end of the zero-crossing detection unit is connected with the output end of the second rectification unit, the other end of the zero-crossing detection unit is connected with the control unit, and the zero-crossing detection unit outputs a zero-crossing detection signal to the control unit by detecting the zero crossing point of the pulsating direct current, so that the control unit controls the controllable switch unit to be switched on or switched off through the controllable switch control circuit at the zero crossing point.
2. The control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to claim 1, it is characterized in that the controllable switch unit is a relay unit, the controllable switch control circuit is a relay control circuit, wherein the relay unit comprises a switch and a coil, one end of the switch is connected with one end of the alternating current power supply, the other end of the switch is respectively connected with one input end of the filtering unit and one input end of the first rectifying unit, the other input end of the first rectifying unit is connected with the other input end of the filtering unit and then is connected to the other end of the alternating current power supply, one end of the coil is connected with one end of the relay control circuit, the other end of the coil is connected with the other end of the relay control circuit, the relay control circuit controls the switch to be switched on or switched off by controlling whether the coil is electrified or not.
3. The control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to claim 1, wherein the second rectifying unit includes: the anode of the first diode is connected with one end of the alternating current power supply, the anode of the second diode is connected with the other end of the alternating current power supply, and the cathode of the first diode is connected with the cathode of the second diode and then serves as the output end of the second rectifying unit.
4. The control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to claim 2, wherein the first rectifying unit includes: the anode of the third diode is connected with the other end of the switch, the anode of the fourth diode is connected with the other end of the alternating current power supply, and the cathode of the third diode is connected with the cathode of the fourth diode and then serves as the output end of the first rectifying unit.
5. The control circuit for reducing standby power consumption of an electromagnetic heating apparatus according to claim 2, wherein the relay control circuit comprises:
a first resistor, one end of the first resistor being connected to the control unit,
the base electrode of the first triode is connected with the other end of the first resistor, and the emitting electrode of the first triode is grounded;
the first capacitor is connected between the base electrode and the emitting electrode of the first triode;
the anode of the fifth diode is respectively connected with the collector of the first triode and one end of the coil, and the cathode of the fifth diode is connected with the other end of the coil;
and one end of the second resistor is connected with the cathode of the fifth diode, and the other end of the second resistor is connected with a preset power supply.
6. An electromagnetic heating device, characterized by comprising a control circuit for reducing standby power consumption of an electromagnetic heating device according to any one of claims 1-5.
7. A control method for reducing standby power consumption of an electromagnetic heating apparatus according to claim 6, characterized by comprising the steps of:
judging whether a standby instruction is received or not;
if the standby instruction is received, outputting a turn-off signal to the controllable switch control circuit to control the controllable switch unit to turn off so as to power off the filtering unit, the rectifier bridge, the first rectifying unit, the surge detection unit and the voltage detection unit;
and detecting the zero crossing point of the alternating current power supply so as to control the controllable switch unit to be switched off according to the zero crossing point of the alternating current power supply when the standby instruction is received.
8. The control method of claim 7, wherein the controllable switch unit is a relay unit, the controllable switch control circuit is a relay control circuit, wherein the relay unit comprises a switch and a coil, one end of the switch is connected with one end of the alternating current power supply, the other end of the switch is respectively connected with one input end of the filtering unit and one input end of the first rectifying unit, the other input end of the first rectifying unit is connected with the other input end of the filtering unit and then is connected to the other end of the alternating current power supply, one end of the coil is connected with one end of the relay control circuit, the other end of the coil is connected with the other end of the relay control circuit, the relay control circuit controls the switch to be switched on or switched off by controlling whether the coil is electrified or not.
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| CN201710828185.9A CN109511187B (en) | 2017-09-14 | 2017-09-14 | Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device |
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| CN201710828185.9A CN109511187B (en) | 2017-09-14 | 2017-09-14 | Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device |
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| CN101452264A (en) * | 2007-07-16 | 2009-06-10 | 周先谱 | Power control device for zero power consumption standby and safety operation |
| KR20110092071A (en) * | 2010-02-08 | 2011-08-17 | 엘지전자 주식회사 | Cooking apparatus using induction heeating |
| CN205005285U (en) * | 2015-09-02 | 2016-01-27 | 九阳股份有限公司 | Low -power consumption electromagnetism stove |
| CN106332338A (en) * | 2015-07-01 | 2017-01-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system, and driving device and driving method of electromagnetic heating system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452264A (en) * | 2007-07-16 | 2009-06-10 | 周先谱 | Power control device for zero power consumption standby and safety operation |
| KR20110092071A (en) * | 2010-02-08 | 2011-08-17 | 엘지전자 주식회사 | Cooking apparatus using induction heeating |
| CN106332338A (en) * | 2015-07-01 | 2017-01-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system, and driving device and driving method of electromagnetic heating system |
| CN205005285U (en) * | 2015-09-02 | 2016-01-27 | 九阳股份有限公司 | Low -power consumption electromagnetism stove |
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