CN204539512U - Electromagnetic heater and the electromagnetic oven with it - Google Patents
Electromagnetic heater and the electromagnetic oven with it Download PDFInfo
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- CN204539512U CN204539512U CN201520208835.6U CN201520208835U CN204539512U CN 204539512 U CN204539512 U CN 204539512U CN 201520208835 U CN201520208835 U CN 201520208835U CN 204539512 U CN204539512 U CN 204539512U
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Abstract
The utility model discloses a kind of electromagnetic heater and electromagnetic oven, this device comprises: power module; Resonance modules, resonance modules has the harmonic oscillator module of resonant inductance and resonant capacitance formation, and wherein the first end of resonant inductance is connected with power module, and the first end of resonant capacitance is connected with the second end of resonant inductance; Electric capacity adjusting module, for adjusting the capacitance of the resonant capacitance in resonance modules, comprising: switch, and the first end of switch is connected with the first end of resonant inductance, and the second end of switch is connected with the second end of resonant capacitance; Adjustment electric capacity, the adjustment first end of electric capacity is connected with the second end of switch, the second end ground connection of adjustment electric capacity; Controller, the closed or disconnection of controller control switch; And switch module, switch module is connected with the second end of resonant inductance in resonance modules.The arrangement achieves heating power laser heating in certain frequency (as 200 watts to 2000 watts) scope, improve cooking food effect, promote Consumer's Experience.
Description
Technical field
The utility model relates to electromagnetic heating technique field, particularly relates to a kind of electromagnetic heater and the electromagnetic oven with this electromagnetic heater.
Background technology
Along with the fast development in Electromagnetic Heating field, electromagnetic oven has become the main flow kitchen tools in people kitchen.At present, electromagnetic oven is mainly by way of electromagnetic induction cooking food, because power output is very large, generally can reach 2000 watts, in order to reduce the loss of electromagnetic oven breaker in middle pipe, just switching tube must be operated in Sofe Switch state, existing scheme generally all adopts LC resonance (wherein, L is inductance, and C is electric capacity) heat protocol.But because resonant circuit has selecting frequency characteristic, only have when the operating frequency of switching tube is consistent with LC resonance frequency, its power output is maximum, operating state is best; When the operating frequency of switching tube more departs from LC resonance frequency, resonant circuit power output is less, and operating state is poorer.
Such as, existing single tube LC resonant electromagnetic heat protocol, because the inductance value L of coil panel (i.e. resonant inducing) and the capacity C of resonant capacitance are all one group of fixed values set, when switching tube is operated in certain power (as 2000 watts) frequency range, (about 20KHz) reaches optimum state, and the switching frequency of switching tube is higher, power is lower, operating state is poorer, be embodied in switching tube and exit Sofe Switch state gradually, enter hard switching state, the temperature rise of switching tube is higher, so single tube LC resonant electromagnetic heating at present can only such as 1000 watts ~ 2000 watts scope laser heating work, low-power heating is realized with the intermittent heating lower than such as 1000 watt-hours, such as realize 500 watts of heating, then with 1000 watts of heating 5 seconds, heating is stopped within 5 seconds, to be cycle heating again, but this intermittent heating culinary art weak effect, cannot meet consumers' demand.
Utility model content
The purpose of this utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this reason, first object of the present utility model is to propose a kind of electromagnetic heater.This device can realize power output laser heating in certain frequency (as 200 watts to 2000 watts) scope, significantly improves cooking food effect, improves user satisfaction.
Second object of the present utility model is to propose a kind of electromagnetic oven.
To achieve these goals, the electromagnetic heater of the utility model first aspect embodiment, comprising: power module; The resonance modules be connected with described power module, wherein, described resonance modules has the harmonic oscillator module of resonant inductance and resonant capacitance formation, wherein, the first end of described resonant inductance is connected with described power module, and the first end of described resonant capacitance is connected with the second end of described resonant inductance; Electric capacity adjusting module, for adjusting the capacitance of the resonant capacitance in described resonance modules, described electric capacity adjusting module comprises: switch, and the first end of described switch is connected with the first end of described resonant inductance, and the second end of described switch is connected with the second end of described resonant capacitance; Adjustment electric capacity, the first end of described adjustment electric capacity is connected with the second end of described switch, the second end ground connection of described adjustment electric capacity; Controller, described controller controls the closed of described switch or disconnects; And switch module, described switch module is connected with the second end of resonant inductance in described resonance modules.
According to the electromagnetic heater of the utility model embodiment, by increasing electric capacity adjusting module, power output laser heating in certain frequency (as 200 watts to 2000 watts) scope can be realized, compared with prior art, achieve the object of low-power laser heating, significantly improve cooking food effect, improve user satisfaction.
Wherein, in embodiment of the present utility model, when the heating power of described electromagnetic heater is greater than setting power value, described switch closes by described controller, and when the heating power of described electromagnetic heater is less than described setting power value, described switch is disconnected.
In embodiment of the present utility model, described switch is relay.
In embodiment of the present utility model, described switch is Metal-Oxide Semiconductor field effect transistor M OSFET or insulated gate bipolar transistor IGBT.
According to an embodiment of the present utility model, described power module comprises: rectifier, and described rectifier is connected with power supply; Inductance, the first end of described inductance is connected with the output of described rectifier, and the second end of described inductance is connected with the first end of described resonant inductance; Filter capacitor, the first end of described filter capacitor is connected with the second end of described inductance, the second end ground connection of described filter capacitor.
To achieve these goals, the electromagnetic oven of the utility model second aspect embodiment, comprising: the electromagnetic heater of the utility model first aspect embodiment.
According to the electromagnetic oven of the utility model embodiment, by increasing electric capacity adjusting module in electromagnetic heater, power output laser heating in certain frequency (as 200 watts to 2000 watts) scope can be realized, compared with prior art, achieve the object of low-power laser heating, significantly improve cooking food effect, improve user satisfaction.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein,
Fig. 1 is the structural representation of the electromagnetic heater according to the utility model embodiment; And
Fig. 2 is the circuit diagram of the electromagnetic heater according to the utility model embodiment.
Reference numeral:
10: power module; 20: resonance modules; 21: harmonic oscillator module; 30: electric capacity adjusting module; 31: controller; 40: switch module; D: rectifier; D1: the output of rectifier; L2: inductance; L 1: the first end of inductance; L2: the second end of inductance; C0: filter capacitor; E1: the first end of filter capacitor; E2: the second end of filter capacitor; L1: resonant inductance; P1: the first end of resonant inductance; P2: the second end of resonant inductance; K: switch; K1: the first end of switch; K2: the second end of switch; C1: resonant capacitance; A1: the first end of resonant capacitance; A2: the second end of resonant capacitance; C2: adjustment electric capacity; B1: the first end of adjustment electric capacity; B2: the second end of adjustment electric capacity; Q1: switching tube; E: the emitter of switching tube.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Below with reference to the accompanying drawings describe the electromagnetic heater of the utility model embodiment and there is its electromagnetic oven.
Fig. 1 is the structural representation of the electromagnetic heater according to the utility model embodiment.Fig. 2 is the circuit diagram of the electromagnetic heater according to the utility model embodiment.As depicted in figs. 1 and 2, this electromagnetic heater can comprise: power module 10, resonance modules 20 (not shown in Fig. 2), electric capacity adjusting module 30 and switch module 40.Particularly, electric capacity adjusting module 30 can be used for the capacitance of the resonant capacitance adjusted in resonance modules 20.It should be noted that, in an embodiment of the present utility model, electric capacity adjusting module 30 can be one or more.That is, one or more electric capacity adjusting module 30 can be had in electromagnetic heater, to adjust the resonant capacitance capacity in resonance modules 20.
Wherein, in embodiment of the present utility model, as depicted in figs. 1 and 2, resonance modules 20 is connected with power module 10, and this resonance modules 20 has the harmonic oscillator module 21 that resonant inductance L1 and resonant capacitance C1 is formed.Wherein, as shown in Figure 2, the first end P1 of resonant inductance L1 is connected with power module 10, and the first end A1 of resonant capacitance C1 is connected with the second end P2 of resonant inductance L1.In addition, as shown in Figure 2, switch module 40 is connected with the second end P2 of resonant inductance L1 in resonance modules 20.
In addition, in embodiment of the present utility model, as shown in Figure 2, electric capacity adjusting module 30 can comprise: K switch, adjustment electric capacity C2 and controller 31 (not shown in Fig. 2), the first end k1 of K switch is connected with the first end P1 of resonant inductance L1, second end k2 of K switch is connected with the second end A2 of resonant capacitance C1, the first end B1 of adjustment electric capacity C2 is connected with the second end k2 of K switch, the second end B2 ground connection of adjustment electric capacity C2, and the second end B2 of adjustment electric capacity C2 is also connected with the emitter E of switch module 40 breaker in middle pipe Q1.
Particularly, the closed or disconnection of controller 31 controllable switch K.Wherein, in embodiment of the present utility model, when the heating power of electromagnetic heater is greater than setting power value, K switch can close by controller 31, and when the heating power of electromagnetic heater is less than setting power value, K switch is disconnected.Wherein, in an embodiment of the present utility model, K switch can be relay.In another embodiment of the present utility model, K switch can be MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide Semiconductor field-effect transistor) or IGBT (Insulated Gate Bipolar Transistor, igbt).
Further, in an embodiment of the present utility model, as shown in Figure 2, power module 10 can comprise rectifier D, inductance L 2 and filter capacitor C0, rectifier D is connected with power supply, and the first end l1 of inductance L 2 is connected with the output d1 of rectifier D, and the second end l2 of inductance L 2 is connected with the first end P1 of resonant inductance L1, the first end E1 of filter capacitor C0 is connected with the second end l2 of inductance L 2, the second end E2 ground connection of filter capacitor C0.
In order to make those skilled in the art can clearly understand advantage of the present utility model, below in conjunction with Fig. 2, the operation principle of the utility model electromagnetic heater is described further.
As shown in Figure 2, when above-mentioned electromagnetic heater is operated in high-power state, namely when the heating power of electromagnetic heater is greater than setting power value (such as 1000 watts), controller 31 controllable switch K closes, resonant inductance L1 and resonant capacitance C1 forms antiresonant circuit, adjustment electric capacity C2 and filter capacitor C0 forms filter capacitor, and now the capacity of the equivalent capacity of resonant tank is the capacity of resonant capacitance C1, then resonance frequency f
0for:
Wherein, L is the inductance value in resonant tank, C
1for the equivalent capacity capacity in resonant tank.
Under preferred condition, as resonance frequency f
0value be 20KHz, PWM (the PulseWidth Modulation of the switching tube Q1 in switch module 40, pulse width modulation) signal is when being 20KHz, electromagnetic heater is in optimum state, the now collector electrode of switching tube Q1 just conducting under voltage zero-cross, for Sofe Switch state, the switching loss of switching tube Q1 is minimum.When reducing the high level pulsewidth of PWM gradually, the ON time of switching tube Q1 reduces, and causes after synchronous circuit on the one hand, and the cycle time of PWM reduces, and the frequency of PWM raises, gradually away from optimum resonant frequency f
0; Resonant inductance L1 storage power is caused to reduce on the other hand, power output reduces gradually, do not have enough energy to make the voltage of resonant capacitance C1 be down to 0V during switching tube Q1 conducting, switching tube Q1 progresses into hard switching state, causes the switching loss of switching tube Q1 to increase.
When above-mentioned electromagnetic heater is operated in small-power state, namely when the heating power of electromagnetic heater is less than setting power value (as 1000 watts), controller 31 controllable switch K disconnects, resonant inductance L1, resonant capacitance C1 and adjustment electric capacity C2 form series resonant circuit, adjustment electric capacity C2 participates in resonant operational, now the equivalent capacity capacity of resonant tank is capacity series connection sum, then the resonance frequency f of resonant capacitance C1 and adjustment electric capacity C2
1for:
Wherein, L is the inductance value in resonant tank, C
1for the capacity of resonant capacitance C1, C
2for the capacity of adjustment electric capacity C2.
Due to resonant capacitance C1 and adjustment electric capacity C2 series connection, so cause the total capacitance in resonant tank to reduce, the resonance frequency f of electromagnetic heater
1increase, under preferred condition, resonance frequency f
1value be 35KHz, can power output be reduced owing to reducing the high level pulsewidth of PWM, the cycle of PWM can be reduced simultaneously, improve the frequency of PWM, suppose that power output is 900 watt-hours, the driving frequency of switching tube Q1 is 35KHz, after K switch disconnection, the resonance frequency f of electromagnetic heater
1rise to 35KHz, consistent with the driving frequency of switching tube Q1, so now electromagnetic heater works in optimum state again, the collector electrode just conducting under voltage zero-cross of switching tube Q1, for Sofe Switch state, the switching loss of switching tube Q1 is minimum, thus realizes low-power laser heating.
According to the electromagnetic heater of the utility model embodiment, by increasing electric capacity adjusting module, power output laser heating in certain frequency (as 200 watts to 2000 watts) scope can be realized, compared with prior art, achieve the object of low-power laser heating, significantly improve cooking food effect, improve user satisfaction.
In order to realize above-described embodiment, the utility model also proposed a kind of electromagnetic oven, and this electromagnetic oven comprises the electromagnetic heater of any one embodiment above-mentioned.
According to the electromagnetic oven of the utility model embodiment, by increasing electric capacity adjusting module in electromagnetic heater, power output laser heating in certain frequency (as 200 watts to 2000 watts) scope can be realized, compared with prior art, achieve the object of low-power laser heating, significantly improve cooking food effect, improve user satisfaction.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
Should be appreciated that each several part of the present utility model can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (6)
1. an electromagnetic heater, is characterized in that, comprising:
Power module;
The resonance modules be connected with described power module, wherein, described resonance modules has the harmonic oscillator module of resonant inductance and resonant capacitance formation, wherein, the first end of described resonant inductance is connected with described power module, and the first end of described resonant capacitance is connected with the second end of described resonant inductance;
Electric capacity adjusting module, for adjusting the capacitance of the resonant capacitance in described resonance modules, described electric capacity adjusting module comprises:
Switch, the first end of described switch is connected with the first end of described resonant inductance, and the second end of described switch is connected with the second end of described resonant capacitance;
Adjustment electric capacity, the first end of described adjustment electric capacity is connected with the second end of described switch, the second end ground connection of described adjustment electric capacity;
Controller, described controller controls the closed of described switch or disconnects; And
Switch module, described switch module is connected with the second end of resonant inductance in described resonance modules.
2. electromagnetic heater as claimed in claim 1, it is characterized in that, wherein, when the heating power of described electromagnetic heater is greater than setting power value, described switch closes by described controller, and when the heating power of described electromagnetic heater is less than described setting power value, described switch is disconnected.
3. electromagnetic heater as claimed in claim 2, it is characterized in that, described switch is relay.
4. electromagnetic heater as claimed in claim 2, it is characterized in that, described switch is Metal-Oxide Semiconductor field effect transistor M OSFET or insulated gate bipolar transistor IGBT.
5. electromagnetic heater as claimed in claim 1 or 2, it is characterized in that, described power module comprises:
Rectifier, described rectifier is connected with power supply;
Inductance, the first end of described inductance is connected with the output of described rectifier, and the second end of described inductance is connected with the first end of described resonant inductance;
Filter capacitor, the first end of described filter capacitor is connected with the second end of described inductance, the second end ground connection of described filter capacitor.
6. an electromagnetic oven, is characterized in that, comprises the electromagnetic heater as described in any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208835.6U CN204539512U (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and the electromagnetic oven with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208835.6U CN204539512U (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and the electromagnetic oven with it |
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| Publication Number | Publication Date |
|---|---|
| CN204539512U true CN204539512U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520208835.6U Withdrawn - After Issue CN204539512U (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and the electromagnetic oven with it |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162970A (en) * | 2015-04-07 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and the electromagnetic oven with it |
| CN106813276A (en) * | 2015-11-27 | 2017-06-09 | 佛山市顺德区美的电热电器制造有限公司 | A kind of electromagnetic oven |
| US10976055B2 (en) | 2015-11-27 | 2021-04-13 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic heating device |
-
2015
- 2015-04-07 CN CN201520208835.6U patent/CN204539512U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162970A (en) * | 2015-04-07 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and the electromagnetic oven with it |
| CN106162970B (en) * | 2015-04-07 | 2022-09-06 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and electromagnetic oven with same |
| CN106813276A (en) * | 2015-11-27 | 2017-06-09 | 佛山市顺德区美的电热电器制造有限公司 | A kind of electromagnetic oven |
| US10976055B2 (en) | 2015-11-27 | 2021-04-13 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic heating device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20220906 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20220906 |