CN106136846B - Cooking apparatus and electric heater unit for cooking apparatus - Google Patents
Cooking apparatus and electric heater unit for cooking apparatus Download PDFInfo
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- CN106136846B CN106136846B CN201510162133.3A CN201510162133A CN106136846B CN 106136846 B CN106136846 B CN 106136846B CN 201510162133 A CN201510162133 A CN 201510162133A CN 106136846 B CN106136846 B CN 106136846B
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Abstract
The invention discloses a kind of cooking apparatus and the electric heater unit of cooking apparatus, which includes：First inductance；IGBT pipe；First and second resonance coils, the first end of the first resonance coil are connected with the first inductance, and the second end of the first resonance coil is connected with the first end of the second resonance coil, and the second end of the second resonance coil is connected with the second end of IGBT pipe；First capacitor；Second and third capacitor, the first end of the second capacitor be connected with the first end of the first resonance coil, the second end of the second capacitor is connected with the first end of third capacitor, and the second end of third capacitor is connected with the second end of the second resonance coil；Switch block, the first node between first end and the first and second resonance coils are connected, and the second node between second end and second and third capacitor is connected；Controller is opened or closed for controlling IGBT pipe and switch block, to pass through control resonance manner, it is ensured that IGBT pipe under high-power and low-power can voltage zero-cross it is open-minded, avoid IGBT pipe from damaging.
Description
Technical field
The present invention relates to living electric apparatus technical field more particularly to a kind of cooking apparatus and for the electric heating of cooking apparatus
Device.
Background technique
The relevant electric heater unit with single IGBT pipe generallys use antiresonant circuit.In the related art, and
The resonant parameter of connection resonance circuit is usually to be arranged under the premise of high-power operation realizing.But its disadvantages are that,
For the resonant parameter in high-power lower setting, if electric heater unit continuous low power is run, it is difficult to control IGBT pipe electricity
Press through zero open-minded, IGBT pipe will be advanced open-minded, and the transient current peak value for opening moment crosses conference damage IGBT pipe, and can also
Cause the fever of IGBT pipe serious, to need to increase cooling fin or increase rotation speed of fan to reinforce the heat dissipation of IGBT pipe.Therefore, phase
There are improved needs for pass technology.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of electric heater unit of cooking apparatus, and the electric heater unit of the cooking apparatus is high-power and continuous
It is open-minded that IGBT tube voltage zero passage can be controlled under low-power, and IGBT pipe is avoided to damage.
It is another object of the present invention to propose a kind of cooking apparatus.
To achieve the goals above, a kind of electric heater unit for cooking apparatus that one aspect of the present invention embodiment proposes, packet
It includes：The first end of first inductance, first inductance is connected with power supply；IGBT pipe, the first end ground connection of the IGBT pipe；First
Resonance coil and the second resonance coil, the first end of first resonance coil are connected with the second end of first inductance, institute
The second end for stating the first resonance coil is connected with the first end of second resonance coil, the second end of second resonance coil
It is connected with the second end of the IGBT pipe, wherein have first between first resonance coil and second resonance coil
Node；First capacitor, the first end of the first capacitor are connected with the first end of first resonance coil, the first capacitor
Second end ground connection；The first of second capacitor and third capacitor, the first end of second capacitor and first resonance coil
End be connected, the second end of second capacitor is connected with the first end of the third capacitor, the second end of the third capacitor and
The second end of second resonance coil is connected, wherein has second node between second capacitor and third capacitor；Switch
Component, the first end of the switch block are connected with the first node, the second end of the switch block and second section
Point is connected；Controller, the controller are used to control being opened or closed for IGBT pipe and the switch block.
The electric heater unit for cooking apparatus proposed according to embodiments of the present invention, the first end of the first resonance coil with
The second end of first inductance is connected, and the second end of the first resonance coil is connected with the first end of the second resonance coil, the second resonance
The second end of coil is connected with the second end of IGBT pipe, and the first end of the second capacitor is connected with the first end of the first resonance coil,
The second end of second capacitor is connected with the first end of third capacitor, the second end of the second end of third capacitor and the second resonance coil
It is connected, the first node between the first end of switch block and the first resonance coil and the second resonance coil is connected, switch block
Second end be connected with the second node between the second capacitor and third capacitor, can pass through controller control IGBT pipe and switching group
Part is opened or closed.The resonance manner of electric heater unit can be switched by switch block as a result, and change simultaneously resonance circuit
Resonant capacitance value and resonance inductance value, to can guarantee that IGBT pipe can under high-power and continuous low power operating condition
Voltage zero-cross is open-minded, and IGBT pipe is avoided to damage, and avoids the fever of IGBT pipe serious, and then the heat dissipation without reinforcing IGBT pipe.
Specifically, the switch block can be relay, IGBT pipe, metal-oxide-semiconductor or thyristor.
Specifically, when the operation power of the electric heater unit is greater than the first predetermined power, the controller controls institute
State switch block closure；When the operation power of the electric heater unit is less than or equal to first predetermined power, the control
Device processed controls the switch block and disconnects.
To achieve the goals above, a kind of cooking apparatus that another aspect of the present invention embodiment proposes, including the electricity
Heating device.
The cooking apparatus proposed according to embodiments of the present invention can be switched resonance manner by electric heater unit, and change simultaneously
Become resonant capacitance value and resonance inductance value, to can guarantee that IGBT pipe can under high-power and continuous low power operating condition
Voltage zero-cross is open-minded, and IGBT pipe is avoided to damage, and avoids the fever of IGBT pipe serious, and then the heat dissipation without reinforcing IGBT pipe.
Detailed description of the invention
Fig. 1 is the circuit diagram of the electric heater unit according to an embodiment of the invention for cooking apparatus, wherein
Switch block disconnects；
Fig. 2 is the circuit diagram of the electric heater unit according to an embodiment of the invention for cooking apparatus, wherein
Switch block closure；And
Fig. 3 is the block diagram of cooking apparatus according to an embodiment of the present invention.
Appended drawing reference：
Electric heater unit 100, first inductance L1, IGBT pipe Q1, the first resonance coil L2, the second resonance coil L3, first
Capacitor C1, the second capacitor C2, third capacitor C3, switch block S1, controller 10, power supply 20, cookware 30, diode D1 and culinary art
Utensil 200.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the cooking apparatus of the air conditioner of the embodiment of the present invention and the electric heating for cooking apparatus are described
Device, electric heater unit 100 is for heating to cook cookware.
As depicted in figs. 1 and 2, the electric heater unit 100 according to an embodiment of the present invention for cooking apparatus includes：First
Inductance L1, IGBT pipe Q1, the first resonance coil L2, the second resonance coil L3, first capacitor C1, the second capacitor C2, third capacitor
C3, switch block S1 and controller 10.
Wherein, the first end of the first inductance L1 is connected with power supply 20；The first end of IGBT pipe Q1, that is, emitter ground connection；First
The first end of resonance coil L2 is connected with the second end of the first inductance L1, the second end and the second resonance line of the first resonance coil L2
The first end for enclosing L3 is connected, and the second end of the second resonance coil L3 is connected with second end, that is, collector of IGBT pipe Q1, wherein the
There is first node between one resonance coil L2 and the second resonance coil L3；The first end of first capacitor C1 and the first resonance coil
The first end of L2 is connected, the second end ground connection of first capacitor C1；The of the first end of second capacitor C2 and the first resonance coil L2
One end is connected, and the second end of the second capacitor C2 is connected with the first end of third capacitor C3, the second end and second of third capacitor C3
The second end of resonance coil L3 is connected, wherein has second node between the second capacitor C2 and third capacitor C3；Switch block S1
First end be connected with first node, the second end of switch block S1 is connected with second node；Controller 10 is for controlling IGBT
Pipe Q1's and switch block S1 is opened or closed.
Specifically, the alternating current such as commercial power rectification 220V can be direct current, the first inductance L1 and filter capacitor by power supply 20
The filter circuit of composition is filtered the direct current after rectification, and filtered direct current is supplied to the first resonance coil L2
It can adjust the first resonance coil and by controlling being opened or closed for switch block S1 with the second resonance coil L3
Connection type between L2 and the second resonance coil L3 and the second capacitor C2 and third capacitor C3, and then change resonance manner.
Further, electric heater unit 100 may also include driver, driver control terminal, that is, grid with IGBT pipe Q1 respectively
Pole is connected with controller 10.The exportable PWM of controller 10 in this way (Pulse Width Modulation, pulse width modulation) control
Signal processed controls being opened or closed for IGBT pipe Q1 to driver, wherein when controller 10 controls IGBT pipe Q1 closure, the
One resonance coil L2 and the second resonance coil L3 are charged, when controller 10, which controls IGBT pipe Q1, to be disconnected, the first resonance line
Circle L2, the second resonance coil L3, the second capacitor C2 and third capacitor C3 are vibrated with the resonance manner that switch block S1 is determined,
Thus alternating magnetic field is generated around the first resonance coil L2 and the second resonance coil L3, the magnetic line of force of alternating magnetic field largely passes through
Cookware 30, and a large amount of vortex are generated in the bottom of a pan of cookware 30, to generate heat needed for culinary art, realize resonance heating.
Specifically, as Fig. 1 example, when 10 control switch component S1 of controller disconnect when, the first resonance coil L2 with
Second resonance coil L3 series connection, the second capacitor C2 connects with third capacitor C3, and the first resonance coil L2 after series connection and the
Two resonance coil L3 are in parallel with third capacitor C3 with the second capacitor C2 after connecting again, electric heater unit 100 with after first connecting simultaneously
The resonance manner of connection is run, the resonant inductance of the first resonance coil L2 and the second resonance coil L3 composition resonance circuit, the second electricity
Hold the resonant capacitance that C2 and third capacitor C3 constitutes resonance circuit；Such as the example of Fig. 2, when 10 control switch component S1 of controller is closed
When conjunction, the first resonance coil L2 is in parallel with the second capacitor C2, and the second resonance coil L3 is in parallel with third capacitor C3, and after parallel connection
The first resonance coil L2 and the second capacitor C2 again with after parallel connection the second resonance coil L3 and third capacitor C3 connect, electric heating
Device 100 constitutes main resonant circuit with resonance manner operation concatenated after first parallel connection, the second resonance coil L3 and third capacitor C3,
First resonance coil L2 and the second capacitor C2 constitutes secondary resonance circuit, and resonant parameter is mainly by the second resonance coil L3 and third electricity
Hold C3 to determine.
Wherein, in resonance manner in parallel after concatenated resonance manner after by first parallel connection switches to first series connection, i.e., formerly
After series connection under resonance manner in parallel, since the first resonance coil L2 connects with the second resonance coil L3, the inductance of resonant inductance
Value is the series value of the first resonance coil L2 and the second resonance coil L3, humorous since the second capacitor C2 connects with third capacitor C3
The capacitance of vibration capacitor is the series value of the second capacitor C2 and third capacitor C3, and series value is less than the capacitance of third capacitor C3,
And less than the capacitance of the second capacitor C2, the capacitance of resonant capacitance becomes smaller, the electricity being stored on resonant capacitance in resonant process
Lotus reduces, and in low-power continuous operation, to be controlled in voltage over zero well open-minded by IGBT pipe Q1 in this way, to avoid
IGBT pipe Q1 damage.
In concatenated resonance manner after switching to first parallel connection by resonance manner in parallel after first connecting, i.e., formerly after parallel connection
Under concatenated resonance manner, the second resonance coil L3 and third capacitor C3 carry out parallel resonance, the first resonance coil L2 and second
Capacitor C2 carries out parallel resonance, handles using the second resonance coil L3 and third capacitor C3 as main resonance, the resonance of resonance circuit
Capacitor close to third capacitor C3 capacitance, and be greater than the second capacitor C2 and third capacitor C3 series value, resonant capacitance
Capacitance increases, and the charge being stored on resonant capacitance in resonant process increases, and in high-power operation, IGBT pipe Q1 can in this way
It is open-minded to be controlled in voltage over zero well, so that IGBT pipe Q1 be avoided to damage.
The electric heater unit for cooking apparatus that the embodiment of the present invention proposes as a result, the first end of the first resonance coil
It is connected with the second end of the first inductance, the second end of the first resonance coil is connected with the first end of the second resonance coil, and second is humorous
The second end of vibration coil is connected with the second end of IGBT pipe, the first end phase of the first end of the second capacitor and the first resonance coil
Even, the second end of the second capacitor is connected with the first end of third capacitor, and the of the second end of third capacitor and the second resonance coil
Two ends are connected, and the first node between the first end of switch block and the first resonance coil and the second resonance coil is connected, switch
Second node between the second end of component and the second capacitor and third capacitor is connected, and IGBT pipe can be controlled by controller and is opened
Close being opened or closed for component.The resonance manner of electric heater unit can be switched by switch block as a result, and change simultaneously resonance
The resonant capacitance value and resonance inductance value of circuit, to can guarantee IGBT pipe under high-power and continuous low power operating condition
Can voltage zero-cross it is open-minded, avoid IGBT pipe from damaging, and avoid the fever of IGBT pipe serious, and then without reinforcing dissipating for IGBT pipe
Heat.
Further, according to one embodiment of present invention, as illustrated in fig. 1 and 2, IGBT pipe Q1 itself further includes：Two poles
Pipe D1, diode D1 are connected in reverse parallel between the first end and second end of IGBT pipe Q1, i.e., the anode of diode D1 and IGBT are managed
The first end of Q1 is connected, and the cathode of diode D1 is connected with the second end of IGBT pipe Q1.
A specific example according to the present invention, controller 10 can be MCU (Micro Control Unit, microcontroller
Device).
A specific embodiment according to the present invention, switch block S1 can be relay, IGBT pipe, metal-oxide-semiconductor or silicon-controlled
Pipe.
A specific embodiment according to the present invention, when the operation power of electric heater unit is greater than the first predetermined power,
10 control switch component S1 of controller closure；When the operation power of electric heater unit is less than or equal to the first predetermined power, control
10 control switch component S1 of device processed is disconnected.
That is, controller 10 can obtain the operation power of electric heater unit in real time, and according to the fortune of electric heater unit
Row power control switching component S1 is opened or closed.Specifically, when the operation power of electric heater unit is greater than the first predetermined power
When, controller 10 judges that electric heater unit 100 is in high power operation state, and 10 control switch component S1 of controller is closed, with
The capacitance of resonant capacitance is set to become larger；When the operation power of electric heater unit is less than or equal to the first predetermined power, controller
10 judge that electric heater unit 100 is in low power operating state, and 10 control switch component S1 of controller is disconnected, so that resonant capacitance
Capacitance become smaller.
According to a preferred embodiment of the present invention, the first predetermined power can be 1000W.When electric heater unit 100 is with certain
When one high-power (such as 2000W) heating, 10 control switch component S1 of controller closure, electric heater unit 100 is to be in parallel
Concatenated resonance manner carries out resonance heating afterwards；When electric heater unit 100 is with the heating of some small-power (such as 500W), control
10 control switch component S1 of device processed is disconnected, and electric heater unit 100 carries out resonance heating with resonance manner in parallel after first connecting.
In this way, electric heater unit can guarantee that IGBT tube voltage zero passage is open-minded, avoids under high-power and continuous low power
The damage of IGBT pipe, and avoid the fever of IGBT pipe serious, without reinforcing the heat dissipation of IGBT pipe.
In addition, the invention also provides a kind of cooking apparatus.
Fig. 3 is the block diagram of cooking apparatus according to an embodiment of the present invention.As shown in figure 3, cooking apparatus 200 includes
The electric heater unit 100 of above-described embodiment.
The cooking apparatus proposed according to embodiments of the present invention can be switched resonance manner by electric heater unit, and change simultaneously
Become resonant capacitance value and resonance inductance value, to can guarantee that IGBT pipe can under high-power and continuous low power operating condition
Voltage zero-cross is open-minded, and IGBT pipe is avoided to damage, and avoids the fever of IGBT pipe serious, and then the heat dissipation without reinforcing IGBT pipe.
Wherein, cooking apparatus 200 can be electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized：With for realizing the logic gates of logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (4)
1. a kind of electric heater unit for cooking apparatus, which is characterized in that including：
The first end of first inductance, first inductance is connected with power supply；
IGBT pipe, the first end ground connection of the IGBT pipe；
First resonance coil and the second resonance coil, the second end of the first end of first resonance coil and first inductance
It is connected, the second end of first resonance coil is connected with the first end of second resonance coil, second resonance coil
Second end be connected with the second end of the IGBT pipe, wherein between first resonance coil and second resonance coil
With first node；
First capacitor, the first end of the first capacitor are connected with the first end of first resonance coil, the first capacitor
Second end ground connection；
Second capacitor and third capacitor, the first end of second capacitor are connected with the first end of first resonance coil, institute
The second end for stating the second capacitor is connected with the first end of the third capacitor, the second end of the third capacitor and described second humorous
The second end of vibration coil is connected, wherein has second node between second capacitor and third capacitor；
Switch block, the first end of the switch block are connected with the first node, the second end of the switch block and institute
Second node is stated to be connected；And
Controller, the controller are used to control being opened or closed for IGBT pipe and the switch block.
2. being used for the electric heater unit of cooking apparatus as described in claim 1, which is characterized in that the switch block is relay
Device, IGBT pipe, metal-oxide-semiconductor or thyristor.
3. being used for the electric heater unit of cooking apparatus as described in claim 1, which is characterized in that wherein,
When the operation power of the electric heater unit is greater than the first predetermined power, the controller controls the switch block and closes
It closes；
When the operation power of the electric heater unit is less than or equal to first predetermined power, described in the controller control
Switch block disconnects.
4. a kind of cooking apparatus, which is characterized in that including electric heater unit as described in any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162133.3A CN106136846B (en) | 2015-04-07 | 2015-04-07 | Cooking apparatus and electric heater unit for cooking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162133.3A CN106136846B (en) | 2015-04-07 | 2015-04-07 | Cooking apparatus and electric heater unit for cooking apparatus |
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| Publication Number | Publication Date |
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| CN106136846A CN106136846A (en) | 2016-11-23 |
| CN106136846B true CN106136846B (en) | 2018-11-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108882421B (en) * | 2017-05-11 | 2021-05-07 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method, heating control device and electromagnetic heating equipment |
| CN108013773A (en) * | 2017-09-30 | 2018-05-11 | 浙江苏泊尔家电制造有限公司 | Cooking apparatus |
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| CN1183020A (en) * | 1996-08-07 | 1998-05-27 | 康塞普特系统设计公司 | Zone heating, system with feedback control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643986B (en) * | 2002-03-19 | 2010-05-05 | 松下电器产业株式会社 | Induction heating apparatus |
| CN203483266U (en) * | 2013-09-04 | 2014-03-19 | 珠海格力电器股份有限公司 | Electromagnetism rice cooker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1183020A (en) * | 1996-08-07 | 1998-05-27 | 康塞普特系统设计公司 | Zone heating, system with feedback control |
| JP2002260834A (en) * | 2001-02-27 | 2002-09-13 | Matsushita Electric Ind Co Ltd | Induction heating device |
| CN2822091Y (en) * | 2005-09-02 | 2006-09-27 | 深圳市拓邦电子科技股份有限公司 | Electromagnetic oven resonant circuit for realizing continuous low power to high power output |
| CN101043768A (en) * | 2006-03-20 | 2007-09-26 | 株式会社理光 | Booster circuit, power-supply unit, and image forming apparatus using the same |
| CN104284466A (en) * | 2013-07-11 | 2015-01-14 | 美的集团股份有限公司 | Intelligent control circuit of multiple electromagnetic heating units |
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| Publication number | Publication date |
|---|---|
| CN106136846A (en) | 2016-11-23 |
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