CN106879095A - Electromagnetic heater and its heating control circuit - Google Patents
Electromagnetic heater and its heating control circuit Download PDFInfo
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- CN106879095A CN106879095A CN201510918406.2A CN201510918406A CN106879095A CN 106879095 A CN106879095 A CN 106879095A CN 201510918406 A CN201510918406 A CN 201510918406A CN 106879095 A CN106879095 A CN 106879095A
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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
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
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- General Induction Heating (AREA)
Abstract
The invention discloses a kind of electromagnetic heater and its heating control circuit, circuit includes：First and second resonant capacitances；First to fourth coil panel；First and second power switch pipes；First and second selecting switch, wherein, first choice switch is used to select first coil disk and the first resonant capacitance, the first power switch pipe to constitute the first resonance circuit, and the second coil panel of selection and the second resonant capacitance, the second power switch pipe constitute the second resonance circuit, first and second selecting switch are used to select tertiary coil disk and the first resonant capacitance, the first power switch pipe to constitute the 3rd resonance circuit, and the 4th coil panel of selection and the second resonant capacitance, the second power switch pipe constitute the 4th resonance circuit；Control module, control module is accordingly controlled to control first to fourth resonance circuit by carrying out to the first and second selecting switch and the first and second power switch pipes, so as to simplify circuit structure and coil panel wiring, and without frequent switching selecting switch.
Description
Technical field
The present invention relates to household electrical appliance technical field, the heating control circuit and one kind of more particularly to a kind of electromagnetic heater
Electromagnetic heater.
Background technology
In mutually powered-down cooking pot, when heater has multiple coil panel components, in addition it is also necessary to reconnect multiple resonant capacitances
With multiple IGBT switches to constitute heater, also, coil panel component number more than three when also need to selection and open
The cooperation of pass.For example, three coil panel components need to switch control with three IGBT, at the same also need to reconnect three it is humorous
Shake electric capacity.So as to, making the circuit structure complexity of heater, the wiring of coil panel component is also complicated, and needs frequent switching
Selecting switch, influence switch service life, and noise is produced in switching, reduce the experience of user.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, one of the invention
Purpose is to propose a kind of circuit structure simply and electric without the computer heating control of the electromagnetic heater of frequent switching selecting switch
Road.
It is another object of the present invention to propose a kind of electromagnetic heater.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of heating control circuit of electromagnetic heater, bag
Include：First resonant capacitance and the second resonant capacitance；First coil disk is to the 4th coil panel；First power switch pipe and the second work(
Rate switching tube；First choice is switched and the second selecting switch, wherein, the first choice switch is used to select first coil disk
When participating in resonance with the second coil panel, the first coil disk, first resonant capacitance and the first power switch pipe structure
Into the first resonance circuit, it is humorous that second coil panel, second resonant capacitance and second power switch pipe constitute second
Shake circuit, when first choice switch and second selecting switch are used to select tertiary coil disk to participate in resonance, described the
Three-winding disk, first resonant capacitance and first power switch pipe constitute the 3rd resonance circuit, and the first choice is opened
When pass and second selecting switch are used to select the 4th coil panel to participate in resonance, the 4th coil panel, second resonance
Electric capacity and second power switch pipe constitute the 4th resonance circuit；Control module, the control module is by described first
Selecting switch, second selecting switch, first power switch pipe and second power switch pipe are accordingly controlled
With select in first resonance circuit, second resonance circuit, the 3rd resonance circuit and the 4th resonance circuit it is any enter
Row work.
The heating control circuit of the electromagnetic heater for proposing according to embodiments of the present invention, is used to select by first choice switch
When first coil disk and the second coil panel participate in resonance, first coil disk, the first resonant capacitance and the first power switch pipe are constituted
First resonance circuit, the second coil panel, the second resonant capacitance and the second power switch pipe constitute the second resonance circuit, and lead to
Cross first choice switch and when the second selecting switch is used to select tertiary coil disk to participate in resonance, tertiary coil disk, the first resonance
Electric capacity and the first power switch pipe constitute the 3rd resonance circuit, and are used to select by first choice switch and the second selecting switch
When selecting the 4th coil panel participation resonance, the 4th coil panel, the second resonant capacitance and the second power switch pipe constitute the 4th resonance electricity
Road, so that, 4 coil panels only need 2 resonant capacitances and 2 switching tubes, simplify the structure and line of heating control circuit
The wiring of disk is enclosed, and frequent switching selecting switch can not needed, extend the service life of selecting switch, reduce selecting switch
Noise during switching, lifts the experience of user.
Some embodiments of the invention, first choice switch is the first relay, and second selecting switch is the
Two relays, wherein, the first end of first relay is connected with the power supply module of the electromagnetic heater, and described
Second end of one relay is connected with the first coil disk and second coil panel, the control end of first relay with
The control module is connected；The first end of second relay is connected with the 3rd end of first relay, and described second
Second end of relay is connected with the tertiary coil disk, and the 3rd end of second relay is connected with the 4th coil panel,
The control end of second relay is connected with the control module.
Some embodiments of the invention, first power switch pipe is an IGBT, and second power switch pipe is
2nd IGBT.
Some embodiments of the invention, one end of first resonant capacitance is connected with the first end of first relay,
The other end of first resonant capacitance is connected by the first coil disk with the second end of first relay, and described
C of the other end of one resonant capacitance also with an IGBT is extremely connected, and the C poles of an IGBT are also by described
Tertiary coil disk is connected with the second end of second relay, the E poles ground connection of an IGBT, an IGBT
G poles be connected with the IGBT driver elements in the control module；One end of second resonant capacitance with described first after
The first end of electrical equipment is connected, and the other end of second resonant capacitance passes through second coil panel and first relay
Second end is connected, and the C of the other end of second resonant capacitance also with the 2nd IGBT is extremely connected, the 2nd IGBT
C poles be also connected with the 3rd end of second relay by the 4th coil panel, the E poles of the 2nd IGBT ground connection,
The G poles of the 2nd IGBT are connected with the IGBT driver elements in the control module.
Some embodiments of the invention, the first coil disk is grounded after being connected with first resonant capacitance, and described the
First node between one coil panel and first resonant capacitance is extremely connected with the C of an IGBT, and described first
The C poles of IGBT are also connected by the tertiary coil disk with the second end of second relay, the E of an IGBT
Pole is grounded, and the G poles of an IGBT are connected with the IGBT driver elements in the control module；Second coil
Disk is grounded after being connected with second resonant capacitance, the Section Point between the tertiary coil disk and second resonant capacitance
C with the 2nd IGBT is extremely connected, and the C poles of the 2nd IGBT also pass through the 4th coil panel and described second
3rd end of relay is connected, the E poles ground connection of the 2nd IGBT, G poles and the control mould of the 2nd IGBT
IGBT driver elements in block are connected.
Some embodiments of the invention, the first coil disk is grounded after being connected with first resonant capacitance, and described the
First node between one coil panel and first resonant capacitance is extremely connected with the C of an IGBT, and described first
The C poles of IGBT are also connected by the tertiary coil disk with the second end of second relay, the E of an IGBT
Pole is grounded, and the G poles of an IGBT are connected with the IGBT driver elements in the control module；Second resonance
One end of electric capacity is connected with the first end of first relay, and the other end of second resonant capacitance passes through second line
Circle disk is connected with the second end of first relay, the other end of second resonant capacitance also with the C of the 2nd IGBT
Extremely it is connected, the C poles of the 2nd IGBT are also connected by the 4th coil panel with the 3rd end of second relay,
IGBT driver elements in the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT and the control module
It is connected.
Some embodiments of the invention, one end of first resonant capacitance is connected with the first end of first relay,
The other end of first resonant capacitance is connected by the first coil disk with the second end of first relay, and described
C of the other end of one resonant capacitance also with an IGBT is extremely connected, and the C poles of an IGBT are also by described
Tertiary coil disk is connected with the second end of second relay, the E poles ground connection of an IGBT, an IGBT
G poles be connected with the IGBT driver elements in the control module；Second coil panel and the second resonant capacitance string
It is grounded after connection, the C poles of Section Point between the tertiary coil disk and second resonant capacitance and the 2nd IGBT
It is connected, the C poles of the 2nd IGBT are also connected by the 4th coil panel with the 3rd end of second relay, institute
State the E poles ground connection of the 2nd IGBT, the IGBT driver element phases in the G poles of the 2nd IGBT and the control module
Even.
Some embodiments of the invention, at least one coil panel includes multiple in the first coil disk to the 4th coil panel
The resonance coil of series connection.
To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of electromagnetic heater, including described electromagnetism
The heating control circuit of heater.
The electromagnetic heater for proposing according to embodiments of the present invention, simplifies circuit structure and the wiring of electromagnetic heater, and
And the relay in electromagnetic heater can not need frequent switching, extend the service life of relay, reduce relay switching
When noise, lifted user experience.
Brief description of the drawings
Fig. 1 is the block diagram of the heating control circuit of electromagnetic heater according to embodiments of the present invention；
Fig. 2 is the circuit theory diagrams of the heating control circuit of electromagnetic heater according to an embodiment of the invention；
Fig. 3 is the circuit theory diagrams of the heating control circuit of electromagnetic heater in accordance with another embodiment of the present invention；
Fig. 4 is the circuit theory diagrams of the heating control circuit of the electromagnetic heater according to another embodiment of the invention；And
Fig. 5 is the circuit theory diagrams of the heating control circuit of the electromagnetic heater according to further embodiment of the present invention.
Reference：
First resonant capacitance C1, the second resonant capacitance C2, first coil disk to the 4th coil panel L1-L4, the first power switch
Pipe 10, the second power switch pipe 20, first choice switch the 30, second selecting switch 40 and control module 50；
First relay KM1, the second relay KM2, power supply module 60, filtration module 70, filter inductance L0, filtering
Electric capacity C0, an IGBTQ1, the 2nd IGBTQ2 and IGBT driver elements 51.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from start to finish
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition electromagnetic heater and electromagnetic heater heating control
Circuit processed.
Fig. 1 is the block diagram of the heating control circuit of electromagnetic heater according to embodiments of the present invention.As shown in figure 1,
The heating control circuit of electromagnetic heater includes：First resonant capacitance C1, the second resonant capacitance C2, first coil disk are extremely
4th coil panel L1-L4, the first power switch pipe 10, the second power switch pipe 20, first choice switch 30, second are selected
Switch 40 and control module 50.
Wherein, when first choice switch 30 is used to select first coil disk L1 and the second coil panel L2 to participate in resonance, First Line
Circle disk L1, the first resonant capacitance C1 and the first power switch pipe 10 constitute the first resonance circuit, the second coil panel L2, the
Two resonant capacitance C2 and the second power switch pipe 20 constitute the second resonance circuit, first choice switch 30 and the second selecting switch
40 when being used to select tertiary coil disk L3 to participate in resonance, and tertiary coil disk L3, the first resonant capacitance C1 and the first power are opened
Close pipe 10 and constitute the 3rd resonance circuit, first choice switch 30 and the second selecting switch 40 are used to select the 4th coil panel L4
When participating in resonance, the 4th coil panel L4, the second resonant capacitance C2 and the second power switch pipe 20 constitute the 4th resonance circuit.
Control module 50 switchs the 30, second selecting switch 40, the first power switch pipe 10 and the second work(by first choice
Rate switching tube 20 accordingly control to select the first resonance circuit, the second resonance circuit, the 3rd resonance circuit and the 4th resonance
Any in circuit is operated.
Various computer heating control programs it should be noted that control module 50 can prestore, control module 50 can be according to computer heating control
Programme-control the first power switch pipe 10 and the conducting of the second power switch pipe 20 and closing.Control module 50 can control the first work(
The power switch pipe 20 of rate switching tube 10 and second takes turns to operate, i.e., control the second power when the first power switch pipe 10 is closed
Switching tube 20 is turned on, and controls the first power switch pipe 10 to turn on when the second power switch pipe 20 is closed；Or control mould
Block 50 also can control the first power switch pipe 10 or the second power switch pipe 20 works independently.
It should be noted that, first choice switch 30 and the second selecting switch 40 can be controlled key control by coil panel, that is, say,
User can control the connection path of key control first choice switch 30 and the second selecting switch 40 by coil panel, and then control
Corresponding coil panel is operated.Certainly, resonance circuit also can controlled module 50 control, can prestore in control module 50
Multiple computer heating control programs, control module 50 can be opened according to the selection of computer heating control programme-control first choice switch 30 and second
40 connection path is closed, and then controls corresponding coil panel to be operated.
It should be noted that, when first choice switch 30 and the second selecting switch 40 are switched over, control module 50 needs
Control the first power switch pipe 10 and the second power switch pipe 20 to close, so as to avoid selecting switch contact arc discharge, postpone choosing
Select the life-span of switch.
Specifically, on electromagnetic heater after electricity, instruction or user's selection that control module 50 can first according to user input
Computer heating control programme-control selection first choice switch 30 and second selecting switch 40, to select to participate in the coil panel of resonance,
Afterwards, control module 50 can be controlled according to computer heating control program to the first power switch pipe 10 and the second power switch pipe 20
System.For example when selecting first coil disk L1 and the second coil panel L2 to participate in resonance, control module 50 can control the first work(
The power switch pipe 20 of rate switching tube 10 and second is turned in turn, so that first coil disk L1 and the second coil panel L2 work in turn
Make；And for example, when selecting tertiary coil disk L3 to participate in resonance, control module 50 can be individually controlled the first power switch pipe
10 on and off, so that tertiary coil disk L3 works independently；For another example, when selecting the 4th coil panel L4 to participate in resonance,
Control module 50 can be individually controlled the on and off of the second power switch pipe 20, so that the 4th coil panel L4 works independently.
Thus, the heating control circuit of the electromagnetic heater of the embodiment of the present invention, 4 coil panels only need 2 resonant capacitances and
2 switching tubes, simplify the wiring of the structure and coil panel of heating control circuit, and frequent switching can not needed to select to open
Close, extend the service life of selecting switch, reduce noise when selecting switch switches, lift the experience of user.
It is described with reference to Fig. 2-5 pairs of circuit structure of the heating control circuit of the embodiment of the present invention, operation principle.
According to the embodiment of Fig. 2-5, first choice switch 30 can be the first relay KM1, and the second selecting switch 40 is the
Two relay KM2, wherein, the first end of the first relay KM1 is connected with the power supply module 60 of electromagnetic heater, the
Second end of one relay KM1 is connected with first coil disk L1 and the second coil panel L2, the control of the first relay KM1
End is connected with control module 50；The first end of the second relay KM2 is connected with the 3rd end of the first relay KM1, the
Second end of two relay KM2 is connected with tertiary coil disk L3, the 3rd end and the 4th coil panel of the second relay KM2
L4 is connected, and the control end of the second relay KM2 is connected with control module 50.
It should be appreciated that the first end of the first relay KM1 refers to the first end of the switch of the first relay KM1, the
Second end of one relay KM1 refers to the second end of the switch of the first relay KM1, the 3rd of the first relay KM1 the
End refers to the 3rd end of the switch of the first relay KM1；Similarly, the first end of the second relay KM2 refers to the second relay
The first end of the switch of device KM2, second end of the second relay KM2 refers to the second of the switch of the second relay KM2
End, the 3rd end of the second relay KM2 refers to the 3rd end of the switch of the second relay KM2.
It should be noted that the coil of the coil of the controllable first relay KM1 of control module 50 and the second relay KM2
It is powered or no power.Wherein, when the coil no power of the first relay KM1, the of the switch of the first relay KM1
One end is logical with the second termination, when the coil electricity of the first relay KM1, the first end of the switch of the first relay KM1
It is logical with the 3rd termination；When the coil no power of the second relay KM2, the first end of the switch of the second relay KM2 with
Second termination is logical, when the coil electricity of the second relay KM2, the first end and the 3rd of the switch of the second relay KM2
Termination is logical.
Wherein, power supply module 60 may include rectification unit, and the input of rectification unit is connected with AC power, rectification module
Output end is connected with the first end of the first relay KM1, and rectification module carries out whole for the alternating current to AC power input
Stream, and the direct current electricity output that will be obtained after rectification is to heating control circuit.Wherein, rectification unit can be diode or rectification
Bridge.
In addition, as shown in Figure 2-5, filtering mould can be also connected between the first end of the relay KM1 of power supply module 60 and first
Block 70, filtration module 70 is used to be filtered the direct current of the output of power supply module 60, and filtered direct current is provided
To heating control circuit.Specifically, filtration module 70 may include filter inductance L0 and filter capacitor C0, filter inductance L0
One end be connected with power supply module 60, the other end of filter inductance L0 is connected with one end of filter capacitor C0, filter capacitor
The other end ground connection of C0, has the 3rd node between filter inductance L0 and filter capacitor C0, the 3rd is with heating control circuit
The first end of the first relay KM1 is connected.
Specifically, in the embodiment of Fig. 2-5, the first power switch pipe 10 can be an IGBTQ1, the second power switch
Pipe 20 can be the 2nd IGBTQ2.Also, it is an IGBTQ1, the 2nd IGBTQ2, the first resonant capacitance C1, second humorous
Shake electric capacity C2 and first coil disk can use following four combination to the 4th coil panel L1-L4.
According to the example of Fig. 2, one end of the first resonant capacitance C1 is connected with the first end of the first relay KM1, and first is humorous
The other end of electric capacity C1 of shaking is connected by first coil disk L1 with second end of the first relay KM1, the first resonant capacitance
C of the other end of C1 also with an IGBTQ1 is extremely connected, the C poles of an IGBTQ1 also by tertiary coil disk L3 with
Second end of the second relay KM2 is connected, the E poles ground connection of an IGBTQ1, G poles and the control of an IGBTQ1
IGBT driver elements 51 in module 50 are connected；One end of second resonant capacitance C2 and the first of the first relay KM1
End is connected, and the other end of the second resonant capacitance C2 is connected by the second coil panel L2 with second end of the first relay KM1,
C of the other end of the second resonant capacitance C2 also with the 2nd IGBTQ2 is extremely connected, and the C poles of the 2nd IGBTQ2 are also by the
Four coil panel L4 are connected with the 3rd end of the second relay KM2, the E poles ground connection of the 2nd IGBTQ2, the 2nd IGBTQ2
G poles be connected with the IGBT driver elements 51 in control module 50.
According to the example of Fig. 3, first coil disk L1 connected with the first resonant capacitance C1 after be grounded, first coil disk L1 with
First node between first resonant capacitance C1 is extremely connected with the C of an IGBTQ1, and the C poles of an IGBTQ1 also lead to
Cross tertiary coil disk L3 to be connected with second end of the second relay KM2, the E poles ground connection of an IGBTQ1, an IGBTQ1
G poles be connected with the IGBT driver elements 51 in control module 50；Second coil panel L2 and the second resonant capacitance C2 goes here and there
It is grounded after connection, the Section Point between tertiary coil disk L3 and the second resonant capacitance C2 is extremely connected with the C of the 2nd IGBTQ2,
The C poles of the 2nd IGBTQ2 are also connected by the 4th coil panel L4 with the 3rd end of the second relay KM2, the 2nd IGBTQ2
E poles ground connection, the G poles of the 2nd IGBTQ2 are connected with the IGBT driver elements 51 in control module 50.
According to the example of Fig. 4, first coil disk L1 connected with the first resonant capacitance C1 after be grounded, first coil disk L1 with
First node between first resonant capacitance C1 is extremely connected with the C of an IGBTQ1, and the C poles of an IGBTQ1 also lead to
Cross tertiary coil disk L3 to be connected with second end of the second relay KM2, the E poles ground connection of an IGBTQ1, an IGBTQ1
G poles be connected with the IGBT driver elements 51 in control module 50；One end of second resonant capacitance C2 and the first relay
The first end of device KM1 is connected, and the other end of the second resonant capacitance C2 passes through the second coil panel L2 and the first relay KM1
The second end be connected, the C of the other end of the second resonant capacitance C2 also with the 2nd IGBTQ2 is extremely connected, the 2nd IGBTQ2
C poles be also connected with the 3rd end of the second relay KM2 by the 4th coil panel L4, the E poles of the 2nd IGBTQ2 ground connection,
The G poles of the 2nd IGBTQ2 are connected with the IGBT driver elements 51 in control module 50.
According to the example of Fig. 5, one end of the first resonant capacitance C1 is connected with the first end of the first relay KM1, and first is humorous
The other end of electric capacity C1 of shaking is connected by first coil disk L1 with second end of the first relay KM1, the first resonant capacitance
C of the other end of C1 also with an IGBTQ1 is extremely connected, the C poles of an IGBTQ1 also by tertiary coil disk L3 with
Second end of the second relay KM2 is connected, the E poles ground connection of an IGBTQ1, G poles and the control of an IGBTQ1
IGBT driver elements 51 in module 50 are connected；Second coil panel L2 is grounded after being connected with the second resonant capacitance C2, the
Section Point between three-winding disk L3 and the second resonant capacitance C2 is extremely connected with the C of the 2nd IGBTQ2, the 2nd IGBTQ2
C poles be also connected with the 3rd end of the second relay KM2 by the 4th coil panel L4, the E poles of the 2nd IGBTQ2 ground connection,
The G poles of the 2nd IGBTQ2 are connected with the IGBT driver elements 51 in control module 50.
It should be noted that IGBT driver elements 51 are used to drive an IGBTQ1 and the under the control of control module 50
Two IGBTQ2.
A specific example of the invention, first coil disk L1 and the second coil panel L2 may be provided at electromagnetic heater
Bottom, tertiary coil disk L3 may be provided at the side of electromagnetic heater, and the 4th coil panel L4 may be provided at Electromagnetic Heating
The top of device, so that, multiple location independent heating is capable of achieving, heating is more uniform, and providing the user diversified culinary art needs
Ask, lift the experience of user.
After electricity on electromagnetic heater, control module 50 can be to the first relay KM1, the second relay KM2, first
IGBTQ1 and the 2nd IGBTQ2 are accordingly controlled, to control electromagnetic heater to carry out resonance heating.Specifically, control
Molding block 50 can control the equal no power of coil of the first relay KM1 and the second relay KM2, now first coil disk
L1 and the second coil panel L2 participates in resonance, and the controllable IGBTQ1 and the 2nd IGBTQ2 of control module 50 is turned in turn,
When IGBTQ1 conductings and the 2nd IGBTQ2 closings, first coil disk L1, the first resonant capacitance C1 and first
The first resonance circuit that IGBTQ1 is constituted works and carries out resonance heating, when an IGBTQ1 is closed and the 2nd IGBTQ2
During conducting, the second resonance circuit work that the second coil panel L2, the second resonant capacitance C2 and the 2nd IGBTQ2 are constituted is gone forward side by side
Row resonance is heated.In this way, an IGBTQ1 and the 2nd IGBTQ2 are turned in turn, electromagnetic heater bottom is arranged on
First coil disk L1 and the second coil panel L2 take turns to operate, so as to when bottom coil disk needs frequent switching to heat, without choosing
Switch frequent movement is selected, extends the service life of selecting switch, reduce noise when selecting switch switches.
Control module 50 also can control the coil no power of the first relay KM1 energizations and the second relay KM2, now only
There is tertiary coil disk L3 to participate in resonance, the controllable IGBTQ1 conductings of control module 50 and the 2nd IGBTQ2 closings,
The 3rd resonance circuit that tertiary coil disk L3, the first resonant capacitance C1 and an IGBTQ1 are constituted works and carries out resonance and adds
Heat.
The coil that control module 50 also can control the first relay KM1 and the second relay KM2 is powered, and now only the
Four coil panel L4 participate in resonance, and the controllable IGBTQ1 of control module 50 is closed and the 2nd IGBTQ2 is turned on, and the 4th
The 4th resonance circuit that coil panel L4, the second resonant capacitance C2 and the 2nd IGBTQ2 are constituted works and carries out resonance heating.
Thus, switched by the heating of the break-make control realization coil panel of power switch pipe, without selecting switch action,
Extend the service life of selecting switch, reduce noise when selecting switch switches, lift the experience of user.
In addition, some embodiments of the invention, at least one coil panel in first coil disk to the 4th coil panel L1-L4
Resonance coil including multiple series connection.In other words, each coil panel may be split into the resonance coil of multiple series connection, and together
Multiple resonance coils of one coil panel can be placed in multiple positions, so that, it is capable of achieving multiple location and heats simultaneously, heating is more
Uniformly, diversified culinary art demand is provided the user, the experience of user is lifted.
In sum, the heating control circuit of the electromagnetic heater for proposing according to embodiments of the present invention, is opened by first choice
When pass is used to select first coil disk and the second coil panel to participate in resonance, first coil disk, the first resonant capacitance and the first power
Switching tube constitutes the first resonance circuit, and the second coil panel, the second resonant capacitance and the second power switch pipe constitute the second resonance electricity
Road, and when being used to select tertiary coil disk to participate in resonance by first choice switch and the second selecting switch, tertiary coil disk,
First resonant capacitance and the first power switch pipe constitute the 3rd resonance circuit, and are opened by first choice switch and the second selection
When pass is used to select the 4th coil panel to participate in resonance, the 4th coil panel, the second resonant capacitance and the second power switch pipe constitute the
Four resonance circuits, so that, 4 coil panels only need 2 resonant capacitances and 2 switching tubes, simplify heating control circuit
The wiring of structure and coil panel, and frequent switching selecting switch can not be needed, extend the service life of selecting switch, reduce
Noise when selecting switch switches, lifts the experience of user.
Finally, the embodiment of the present invention also proposed a kind of electromagnetic heater, including above-described embodiment electromagnetic heater
Heating control circuit.
The electromagnetic heater for proposing according to embodiments of the present invention, simplifies circuit structure and the wiring of electromagnetic heater, and
And the relay in electromagnetic heater can not need frequent switching, extend the service life of relay, reduce relay switching
When noise, lifted user experience.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of the description present invention and simplify and describe, rather than indicate or imply signified device or
Element with specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " be only used for describe purpose, and it is not intended that indicate or imply relative importance or
The implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed or hidden
Include at least one this feature containing ground.In the description of the invention, " multiple " is meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the art such as term " installation ", " connected ", " connection ", " fixation "
Language should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be machinery
Connection, or electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection or two interaction relationships of element inside part, unless otherwise clearly restriction.For the ordinary skill of this area
For personnel, above-mentioned term concrete meaning in the present invention can be as the case may be understood.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be
First and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below "
Can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second
Feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specific example ",
Or the description of " some examples " etc. means to combine specific features, structure, material or feature bag that the embodiment or example are described
It is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
Combined in an appropriate manner in individual or multiple embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Can be combined for the feature of the different embodiments or example described in this specification and different embodiments or example by art personnel
And combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, changes, replacing and modification.
Claims (9)
1. a kind of heating control circuit of electromagnetic heater, it is characterised in that including：
First resonant capacitance and the second resonant capacitance；
First coil disk is to the 4th coil panel；
First power switch pipe and the second power switch pipe；
First choice is switched and the second selecting switch, wherein, the first choice switch is used to select first coil disk and second
When coil panel participates in resonance, the first coil disk, first resonant capacitance and first power switch pipe constitute first
Resonance circuit, second coil panel, second resonant capacitance and second power switch pipe constitute the second resonance circuit,
When the first choice switch and second selecting switch are used to select tertiary coil disk to participate in resonance, the tertiary coil disk,
First resonant capacitance and first power switch pipe constitute the 3rd resonance circuit, the first choice switch and described the
When two selecting switch are used to select the 4th coil panel to participate in resonance, the 4th coil panel, second resonant capacitance and described
Second power switch pipe constitutes the 4th resonance circuit；
Control module, the control module is by first choice switch, second selecting switch, first work(
Rate switching tube and second power switch pipe carry out corresponding control to select first resonance circuit, second resonance electricity
Any in road, the 3rd resonance circuit and the 4th resonance circuit is operated.
2. the heating control circuit of electromagnetic heater according to claim 1, it is characterised in that the first choice
It is the first relay to switch, and second selecting switch is the second relay, wherein,
The first end of first relay is connected with the power supply module of the electromagnetic heater, and the of first relay
Two ends are connected with the first coil disk and second coil panel, control end and the control module of first relay
It is connected；
The first end of second relay is connected with the 3rd end of first relay, the second end of second relay
It is connected with the tertiary coil disk, the 3rd end of second relay is connected with the 4th coil panel, second relay
The control end of device is connected with the control module.
3. the heating control circuit of electromagnetic heater according to claim 2, it is characterised in that first power
Switching tube is an IGBT, and second power switch pipe is the 2nd IGBT.
4. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein,
One end of first resonant capacitance is connected with the first end of first relay, first resonant capacitance it is another
End is connected by the first coil disk with the second end of first relay, the other end of first resonant capacitance also with
The C of the first IGBT is extremely connected, the C poles of an IGBT also by the tertiary coil disk with described second after
Second end of electrical equipment is connected, the E poles ground connection of an IGBT, the G poles of an IGBT and the control module
In IGBT driver elements be connected；
One end of second resonant capacitance is connected with the first end of first relay, second resonant capacitance it is another
End is connected by second coil panel with the second end of first relay, the other end of second resonant capacitance also with
The C of the 2nd IGBT is extremely connected, and the C poles of the 2nd IGBT also pass through the 4th coil panel and second relay
The 3rd end be connected, the E poles of the 2nd IGBT ground connection, in the G poles of the 2nd IGBT and the control module
IGBT driver elements are connected.
5. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein,
The first coil disk is grounded after being connected with first resonant capacitance, and the first coil disk and first resonance are electric
First node between appearance is extremely connected with the C of an IGBT, and the C poles of an IGBT also pass through the described 3rd
Coil panel is connected with the second end of second relay, the E poles ground connection of an IGBT, the G of an IGBT
Pole is connected with the IGBT driver elements in the control module；
Second coil panel is grounded after being connected with second resonant capacitance, and the tertiary coil disk and second resonance are electric
Section Point between appearance is extremely connected with the C of the 2nd IGBT, and the C poles of the 2nd IGBT also pass through the described 4th
Coil panel is connected with the 3rd end of second relay, the E poles ground connection of the 2nd IGBT, the G of the 2nd IGBT
Pole is connected with the IGBT driver elements in the control module.
6. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein,
The first coil disk is grounded after being connected with first resonant capacitance, and the first coil disk and first resonance are electric
First node between appearance is extremely connected with the C of an IGBT, and the C poles of an IGBT also pass through the described 3rd
Coil panel is connected with the second end of second relay, the E poles ground connection of an IGBT, the G of an IGBT
Pole is connected with the IGBT driver elements in the control module；
One end of second resonant capacitance is connected with the first end of first relay, second resonant capacitance it is another
End is connected by second coil panel with the second end of first relay, the other end of second resonant capacitance also with
The C of the 2nd IGBT is extremely connected, the C poles of the 2nd IGBT also by the 4th coil panel with described second after
3rd end of electrical equipment is connected, the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT and the control module
In IGBT driver elements be connected.
7. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein,
One end of first resonant capacitance is connected with the first end of first relay, first resonant capacitance it is another
End is connected by the first coil disk with the second end of first relay, the other end of first resonant capacitance also with
The C of the first IGBT is extremely connected, the C poles of an IGBT also by the tertiary coil disk with described second after
Second end of electrical equipment is connected, the E poles ground connection of an IGBT, the G poles of an IGBT and the control module
In IGBT driver elements be connected；
Second coil panel is grounded after being connected with second resonant capacitance, and the tertiary coil disk and second resonance are electric
Section Point between appearance is extremely connected with the C of the 2nd IGBT, and the C poles of the 2nd IGBT also pass through the described 4th
Coil panel is connected with the 3rd end of second relay, the E poles ground connection of the 2nd IGBT, the G of the 2nd IGBT
Pole is connected with the IGBT driver elements in the control module.
8. the heating control circuit of the electromagnetic heater according to any one of claim 1-6, it is characterised in that institute
At least one coil panel includes the resonance coil of multiple series connection in stating first coil disk to the 4th coil panel.
9. a kind of electromagnetic heater, it is characterised in that including the Electromagnetic Heating according to any one of claim 1-8
The heating control circuit of device.
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| CN201510918406.2A CN106879095B (en) | 2015-12-11 | 2015-12-11 | Electromagnetic heating device and heating control circuit thereof |
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| CN201510918406.2A CN106879095B (en) | 2015-12-11 | 2015-12-11 | Electromagnetic heating device and heating control circuit thereof |
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| CN108156684A (en) * | 2017-12-08 | 2018-06-12 | 广东美的厨房电器制造有限公司 | For the heating control circuit and electromagnetic cooking appliance of electromagnetic cooking appliance |
| CN110338630A (en) * | 2018-04-03 | 2019-10-18 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating cooking utensil and its heating control circuit and control method |
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| CN203457346U (en) * | 2013-07-11 | 2014-02-26 | 美的集团股份有限公司 | Electromagnetic heating device and control circuit thereof |
| CN203457342U (en) * | 2013-07-11 | 2014-02-26 | 美的集团股份有限公司 | Electromagnetic heating device and control circuit thereof |
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| CN108156684B (en) * | 2017-12-08 | 2019-07-05 | 广东美的厨房电器制造有限公司 | Heating control circuit and electromagnetic cooking appliance for electromagnetic cooking appliance |
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| Publication number | Publication date |
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| CN106879095B (en) | 2023-03-21 |
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