CN102238764B - Heating device with a plurality of induction coils - Google Patents
Heating device with a plurality of induction coils Download PDFInfo
- Publication number
- CN102238764B CN102238764B CN201010169345.1A CN201010169345A CN102238764B CN 102238764 B CN102238764 B CN 102238764B CN 201010169345 A CN201010169345 A CN 201010169345A CN 102238764 B CN102238764 B CN 102238764B
- Authority
- CN
- China
- Prior art keywords
- phase
- induction coil
- power supply
- supply unit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Induction Heating Cooking Devices (AREA)
Abstract
The invention discloses a heating device with a plurality of induction coils. The heating device comprises a first induction coil and a second induction coil with the same axis, a first-phase power supply unit, a second-phase power supply unit, a power supply controller and a user interface unit, wherein the first-phase power supply unit is connected with the first induction coil and is used for receiving a first-phase input voltage and outputting a first voltage; the second-phase power supply unit is connected with the second induction coil and is used for receiving a second-phase input voltage and outputting a second voltage; the power supply controller is connected to the first-phase power supply unit and the second-phase power supply unit and is used for controlling the operation of the first-phase power supply unit and the second-phase power supply unit; the user interface unit is connected with the power supply controller and is used for controlling the operation of the power supply controller; and a phase difference is formed between the first-phase input voltage and the second-phase input voltage. By the device, higher heating quantity or power can be provided. In addition, the integral cost is lower, the stability is relatively improved, and the device is suitable for ingredient containers of various sizes.
Description
Technical field
The present invention relates to a kind of heater, relate in particular to a kind of heater with multiple induction coils.
Background technology
In recent years along with scientific and technological progress, the heater of people's culinary art no longer only has single kind to select, except utilizing the heater of gas fuel heating, more there are the multiple choices such as microwave oven, infrared-type baking box and electric-heating heating furnace, these heaters miscellaneous respectively have its pluses and minuses, can be applicable to respectively the occasion of culinary art and the culinary art of various different food materials, to meet the user of different demands.
For two cook utensils are heated simultaneously, in some traditional heating devices, two induction coils can be set respectively in different heating region, to realize simultaneously the heating of two cook utensils, and make two cook utensils can there is different heating-up temperatures by the electric weight size that adjustment supplies power to each induction coil.Refer to Fig. 1, it is traditional structural representation with the heater of two induction coils.As shown in Figure 1, the first induction coil 11a of traditional heating device 1 and the second induction coil 11b are separately positioned on the first heating region A1 and the second heating region A2.In the time of operation, the first induction coil 11a and the second induction coil 11b respectively can be to being positioned over the first cook utensil 2a and the second cook utensil 2b induction heating that is positioned over the second heating region A2 of the first heating region A1.
But, when the first induction coil 11a and the second induction coil 11b are during simultaneously to relatively large cook utensil induction heating (not shown), because of two induction coil 11a, cannot be effectively corresponding between 11b and larger cook utensil, make two induction coil 11a, the efficiency of heating surface of 11b is lower, and heater 1 cannot be promoted to the heat summation that adds of the first induction coil 11a and the second induction coil 11b to large-scale cook utensil induction heating amount.
Moreover, traditional heating device 1 uses single phase poaer supply, and be converted to respectively the first induction coil 11a and the required voltage pattern of the second induction coil 11b makes its operation, as two induction coil 11a, when 11b heats simultaneously, can cause the input current of heater 1 excessive, therefore be limited to the electric power system of single phase poaer supply, cannot provide the heater 1 of heat more greatly or power.
Therefore, how to develop a kind of heater with multiple induction coils that improves above-mentioned known techniques defect, real is the current problem in the urgent need to address of correlative technology field.
Summary of the invention
The object of the present invention is to provide a kind of heater with multiple induction coils, it uses heterogeneous formula input power, compared to the traditional heating device that uses single-phase input power, under the power circuit of same electrical flow valuve restriction, can not cause the electric current of power circuit excessive, therefore larger heat or the power of adding can be provided.
Another object of the present invention is to provide a kind of heater with multiple induction coils, it uses heterogeneous formula input power, and the operation of each phase Power supply unit is by single power controller controls, therefore holistic cost is lower, and can use better simply algorithm, stability improves relatively.In addition, the invention provides there is the heater of multiple induction coils can be according to the size of food material container, corresponding the first induction coil, the second induction coil and the 3rd induction coil are optionally moved, therefore can be suitable for the food material container of all size.
Another object of the present invention is to provide a kind of heater with multiple induction coils, can be effectively corresponding between its multiple induction coils and food material container, so multiple induction coils can be equivalent to single equivalent induction coil high-power or heat greatly, make the efficiency of heating surface of multiple induction coils relatively high, heater can be promoted to the heat summation that adds of multiple induction coils to relatively large food material container induction heating amount.
For reaching above-mentioned purpose, of the present invention one compared with broad sense execution mode for a kind of heater with multiple induction coils is provided, comprise: the first induction coil; The second induction coil is identical with the axle center of the first induction coil; First-phase Power supply unit, is connected with the first induction coil, and framework is in receiving first-phase input voltage and exporting the first voltage; Second-phase Power supply unit, is connected with the second induction coil, and framework is in receiving second-phase input voltage and exporting second voltage; Power-supply controller of electric, is connected in first-phase Power supply unit and second-phase Power supply unit, and controls first-phase Power supply unit and the operation of second-phase Power supply unit; And User's Interface unit, be connected with power-supply controller of electric, in order to move to control power-supply controller of electric; Wherein, between first-phase input voltage and second-phase input voltage, there is a phase difference.
In sum, the heater that the present invention has multiple induction coils can provide larger heat or the power of adding.In addition, its holistic cost is lower, and single power-supply controller of electric can use better simply algorithm, and stability improves relatively.What is more, can be promoted to the heat summation that adds of multiple induction coils to relatively large food material container induction heating amount.In addition can be suitable for, the food material container of all size.
Brief description of the drawings
Fig. 1: for tradition has the structural representation of the heater of two induction coils.
Fig. 2: be the structural representation of the heater with multiple induction coils of preferred embodiment of the present invention.
Fig. 3: be the circuit block diagram of the heater with multiple induction coils of preferred embodiment of the present invention.
Fig. 4: be the structural representation of the heater with multiple induction coils of another preferred embodiment of the present invention.
Fig. 5: be the circuit block diagram of the heater with multiple induction coils of another preferred embodiment of the present invention.
Fig. 6: be the circuit block diagram of the heater with multiple induction coils of another preferred embodiment of the present invention.
Description of reference numerals in above-mentioned accompanying drawing is as follows:
1: traditional heating device 11a: the first induction coil
11b: the second induction coil A1: the first heating region
A2: the second heating region 2a: the first cook utensil
2b: the second cook utensil
3: the heater with multiple induction coils
30a: first-phase Power supply unit 30b: second-phase Power supply unit
30c: third phase Power supply unit 31a: the first induction coil
31b: the second induction coil 31c: the 3rd induction coil
31a1,31b1,31c1: first end 31a2,31b2,31c2: the second end
32: User's Interface unit 32a, 32a: adjust element
321: microprocessor 322: input-output interface
33a: the first rectification circuit 33b: the second rectification circuit
33c: the 3rd rectification circuit 34a: the first filter circuit
34b: the second filter circuit 34c: the 3rd filter circuit
35a: the first inverter circuit 35b: the second inverter circuit
35c: the 3rd inverter circuit 36a: the first current detection circuit
36b: the second current detection circuit 36c: the 3rd current detection circuit
37: power-supply controller of electric
38a～38c: first～tertiary coil current detection circuit
4: food material container 5: three phase supply setting
Qa1: the first switch Qa2: second switch
Qb1: the 3rd switch Qb2: the 4th switch
Qc1: the 5th switch Qc2: the 6th switch
Ca1: the first capacitor C a2: the second electric capacity
Cb1: the 3rd capacitor C b2: the 4th electric capacity
Cc1; The 5th capacitor C c2; The 6th electric capacity
Ck1: the first filter capacitor Ck2: the second filter capacitor
Ck3: the 3rd filter capacitor B1: the thermal treatment zone
Rs1～Rs3: the first～three detects resistance
Va: first-phase input voltage Vb: second-phase input voltage
Vc: third phase input voltage V1: the first voltage
V2: second voltage V3: tertiary voltage
Vr1: first-phase commutating voltage Vr2: second-phase commutating voltage
Vr3: third phase commutating voltage Ia: first-phase input current
Ib: second-phase input current Ic: third phase input current
I1～I3: the first～three electric current L1～L3: the first～three line end
N: neutral end
Vs1～Vs3: the first～three current detection signal
Embodiment
Some exemplary embodiments that embody feature & benefits of the present invention will describe in detail in the explanation of back segment.Be understood that the present invention can have various variations in different modes, it does not depart from the scope of the present invention, and explanation wherein and the accompanying drawing use that ought explain in itself, but not in order to limit the present invention.
Refer to Fig. 2, the structural representation of its heater with multiple induction coils that is preferred embodiment of the present invention.As shown in Figure 2, the heater 3 that has multiple induction coils comprises: the first induction coil 31a, the second induction coil 31b and User's Interface unit 32 (user interface unit).Wherein, the first induction coil 31a is arranged on the medial region of thermal treatment zone B1, and it is identical with the axle center of the first induction coil 31a that the second induction coil 31b is arranged on exterior lateral area and its axle center of thermal treatment zone B1, in order to food material container 4 induction heating.User's Interface unit 32 is arranged at the surface of the body of the heater 3 with multiple induction coils, in order to the heating option of selecting according to user, for example close, open, add heat, heating time, mode of heating or instant heating mode etc. at a slow speed, and the corresponding heat that adds of controlling the first induction coil 31a and the second induction coil 31b.
In the present embodiment, User's Interface unit 32 comprises for example two touch-tone adjustment element 32a, 32b, user can realize by adjusting element 32a, 32b the selection of heating option, but not as limit, can be also revolving adjustment element (not shown).In some embodiment, User's Interface unit 32 uses touch-control display panel (not shown) to realize the selection of heating option, and utilize touch-control display panel to show current operation information, such as closed condition, opening, add heat, heating time, mode of heating operation or the operation of instant heating mode etc. at a slow speed at present.
When the first induction coil 31a and the second induction coil 31b are during simultaneously to food material container 4 induction heating, because the axle center of the first induction coil 31a and the second induction coil 31b is identical and arrange in the mode of Internal and external cycle, so the first induction coil 31a and the second induction coil 31b both can be effectively corresponding with relatively large food material container 4, the first induction coil 31a and the second induction coil 31b can equivalence become single equivalent induction coil high-power or heat greatly, make the efficiency of heating surface of the first induction coil 31a and the second induction coil 31b relatively high, heater 3 can be promoted to the heat summation that adds of the first induction coil 31a and the second induction coil 31b to food material container 4 induction heating amounts.
Refer to Fig. 3, the circuit block diagram of its heater with multiple induction coils that is preferred embodiment of the present invention.As shown in Figure 3, the heater 3 that has multiple induction coils comprises: the first induction coil 31a, the second induction coil 31b, User's Interface unit 32, the first rectification circuit 33a, the second rectification circuit 33b, the first filter circuit 34a, the second filter circuit 34b, the first inverter circuit 35a (inverter circuit), the second inverter circuit 35b, the first current detection circuit 36a, the second current detection circuit 36b and power-supply controller of electric 37.Wherein, the first rectification circuit 33a, the first filter circuit 34a, the first inverter circuit 35a and the first current detection circuit 36a form first-phase Power supply unit 30a, and first-phase Power supply unit 30a receives first-phase input voltage Va and exports the first voltage V1 to the first induction coil 31a, makes the first induction coil 31a to food material container 4 induction heating.Similarly, the second rectification circuit 33b, the second filter circuit 34b, the second inverter circuit 35b and the second current detection circuit 36b form second-phase Power supply unit 30b, and second-phase Power supply unit 30b receives second-phase input voltage Vb and exports second voltage V2 to the second induction coil 31b, makes the second induction coil 31b to food material container 4 induction heating.
In the present embodiment, the heater 3 with multiple induction coils uses single power-supply controller of electric 37 to control first-phase Power supply unit 30a and second-phase Power supply unit 30b operation simultaneously, and power-supply controller of electric 37 is connected with the circuit board of User's Interface unit 32 by connecting line.Therefore, the service data of each phase Power supply unit can be obtained in User's Interface unit 32, for example the running frequency of the first voltage V1 and second voltage V2.Owing to using single power-supply controller of electric 37, therefore holistic cost can be lower, and User's Interface unit 32 can be controlled power-supply controller of electric 37 with better simply algorithm and move, and stability improves relatively.In some embodiment, first-phase Power supply unit 30a, second-phase Power supply unit 30b and power-supply controller of electric 37 can be arranged on same circuit board, and its stability improves relatively.
In the present embodiment, the first rectification circuit 33a and the second rectification circuit 33b are bridge rectifier, and the input of the first rectification circuit 33a and the second rectification circuit 33b is connected to the wherein two-phase of three phase supply equipment 5 by power circuit, in order to receive respectively first-phase input voltage Va and the second-phase input voltage Vb of three phase mains, and rectification is first-phase commutating voltage Vr1 and second-phase commutating voltage Vr2 respectively.Because the phase difference of first-phase input voltage Va and second-phase input voltage Vb is 120 degree, therefore compared to the traditional heating device that uses single-phase input power, under the power circuit of same electrical flow valuve restriction, can not cause the electric current of power circuit excessive, the heater 3 that the present invention has multiple induction coils can provide the first induction coil 31a and the second induction coil 31b larger add heat or power.For example, if while making first-phase input current Ia and second-phase input current Ib maximum be 10A (ampere) because of the current value restriction of power circuit, compared to the traditional heating device that uses single-phase input power, if the maximum of same input current is 10A, the present invention has maximum heating amount or the power that the maximum heating amount of heater 3 of multiple induction coils or power can be greater than traditional heating device.
According to conception of the present invention, the first filter circuit 34a is connected in the output of the first rectification circuit 33a, and the second filter circuit 34b is connected in the output of the second rectification circuit 33b, in order to the radio-frequency component of difference filtering first-phase commutating voltage Vr1 and second-phase commutating voltage Vr2.In the present embodiment, the first filter circuit 34a and the second filter circuit 34b are respectively the first filter capacitor Ck1 and the second filter capacitor Ck2, but not as limit.
In the present embodiment, the first inverter circuit 35a comprises: the first switch Qa1, second switch Qa2, the first capacitor C a1 and the second capacitor C a2, wherein, the first switch Qa1 and second switch Qa2 are connected in series, and the link of the first switch Qa1 and second switch Qa2 is connected in the first end 31a1 of the first induction coil 31a.The first capacitor C a1 and the second capacitor C a2 are connected in series, and the link of the first capacitor C a1 and the second capacitor C a2 is connected in the second end 31a2 of the first induction coil 31a.Power-supply controller of electric 37 is connected with the control end of the first switch Qa1 and second switch Qa2, to control staggered (interleave) conducting of the first switch Qa1 and second switch Qa2, makes the first inverter circuit 35a produce the first voltage V1 exchanging.In the present embodiment, in the time of the first switch Qa1 conducting, second switch Qa2 cut-off, the electric energy of first-phase commutating voltage Vr1 can sequentially be sent to the first induction coil 31a via the first switch Qa1 and the second capacitor C a2.In the time of second switch Qa2 conducting, the first switch Qa1 cut-off, the electric energy of first-phase commutating voltage Vr1 can sequentially be sent to the first induction coil 31a via the first capacitor C a1 and second switch Qa2.
Similarly, in the present embodiment, the second inverter circuit 35b comprises: the 3rd switch Qb1, the 4th switch Qb2, the 3rd capacitor C b1 and the 4th capacitor C b2.Wherein, the 3rd switch Qb1 and the 4th switch Qb2 are connected in series, and the link of the 3rd switch Qb1 and the 4th switch Qb2 is connected in the first end 31b1 of the second induction coil 31b.The 3rd capacitor C b1 and the 4th capacitor C b2 are connected in series, and the link of the 3rd capacitor C b1 and the 4th capacitor C b2 is connected in the second end 31b2 of the second induction coil 31b.Power-supply controller of electric 37 is connected with the control end of the 3rd switch Qb1 and the 4th switch Qb2, to control the staggered conducting of the 3rd switch Qb1 and the 4th switch Qb2, makes the second inverter circuit 35b produce the second voltage V2 exchanging.In the present embodiment, in the time of the 3rd switch Qb1 conducting, the 4th switch Qb2 can end, and the electric energy of second-phase commutating voltage Vr2 can sequentially be sent to the second induction coil 31b via the 3rd switch Qb1 and the 4th capacitor C b2.In the time of the 4th switch Qb2 conducting, the 3rd switch Qb1 can end, and the electric energy of second-phase commutating voltage Vr2 can sequentially be sent to the second induction coil 31b via the 3rd capacitor C b1 and the 4th switch Qb2.
In the present embodiment, the first current detection circuit 36a is the first detection resistance R s1, but not as limit, can be also current transformer (current transformer).The first current detection circuit 36a is connected between the first filter circuit 34a and the first inverter circuit 35a, and in order to detect the first electric current I 1 that flows into the first inverter circuit 35a, and the corresponding first current detection signal Vs1 that produces is to power-supply controller of electric 37.Similarly, in the present embodiment, the second current detection circuit 36b is the second detection resistance R s2, but not as limit, can be also current transformer.The second current detection circuit 36b is connected between the second filter circuit 34b and the second inverter circuit 35b, and in order to detect the second electric current I 2 that flows into the second inverter circuit 35b, and the corresponding second current detection signal Vs2 that produces is to power-supply controller of electric 37.Power-supply controller of electric 37 can judge by the first current detection signal Vs1 and the second current detection signal Vs2 the whether overrate of power of the first induction coil 31a and the second induction coil 31b, in the time of overrate, corresponding reduction the first inverter circuit 35a and the second inverter circuit 35b export the power of the first induction coil 31a and the second induction coil 31b to.
In the present embodiment, User's Interface unit 32 comprises: microprocessor 321 (micro processor) and input-output interface 322, wherein microprocessor 321 is connected between power-supply controller of electric 37 and input-output interface 322, controls the heat that adds of the first induction coil 31a and the second induction coil 31b in order to the heating option of selecting according to user by power-supply controller of electric 37.In the present embodiment, input-output interface 322 is touch-control display panel, in order to realize the selection of heating option, and utilizes touch-control display panel to show current operation information.In the present embodiment, in the time that the first induction coil 31a and the second induction coil 31b move simultaneously, microprocessor 321 can be controlled the first voltage V1 and the second voltage V2 that the first inverter circuit 35a exports same-phase, same frequency or synchronizes with the second inverter circuit 35b by power-supply controller of electric 37, to prevent that noise from producing.
Refer to Fig. 4 and coordinate Fig. 2, wherein Fig. 4 is the structural representation of the heater with multiple induction coils of another preferred embodiment of the present invention.Fig. 4 and Fig. 2 difference are that the heater 3 in Fig. 4 with multiple induction coils more comprises the 3rd induction coil 31c, make Fig. 4 heater 3 add the heater 3 that heat is greater than Fig. 2.As shown in Figure 4, the axle center of the 3rd induction coil 31c, the first induction coil 31a and the second induction coil 31b is identical, in the present embodiment, the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c respectively with interior, in, the mode of outer ring arranges.Similarly, when the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c are during simultaneously to food material container 4 induction heating, because the axle center of the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c is identical, so heater 3 can be promoted to the heat summation that adds of the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c to food material container 4 induction heating amounts.
For example, each phase input voltage (Va, Vb, Vc) be 230 volts, and because the current value restriction of power circuit makes first-phase input current Ia, the maximum of second-phase input current Ib and third phase input current Ic is 16 ampere-hours, tradition is used maximum heating amount or the power of the heater of single phase poaer supply to be only about 3600 watts (Watt), and the first induction coil 31a of the present invention, the maximum heating amount of the second induction coil 31b and the 3rd induction coil 31c is about respectively 3600 watts, therefore the present invention has the maximum heating amount of the also heater 3 of multiple induction coils or power and can promote and be about 10800 watts, be greater than three times of the maximum heating amount of traditional heating device or power.
Refer to Fig. 5 and coordinate Fig. 3, wherein Fig. 5 is the circuit block diagram of the heater with multiple induction coils of another preferred embodiment of the present invention.Fig. 5 and Fig. 3 difference are that the heater 3 in Fig. 5 with multiple induction coils more comprises: the 3rd induction coil 31c, the 3rd rectification circuit 33c, the 3rd filter circuit 34c, the 3rd inverter circuit 35c and the 3rd current detection circuit 36c.Similarly, the 3rd rectification circuit 33c, the 3rd filter circuit 34c, the 3rd inverter circuit 35c and the 3rd current detection circuit 36c form third phase Power supply unit 30c, and third phase Power supply unit 30c receives third phase input voltage Vc and exports tertiary voltage V3 to the three induction coil 31c, makes the 3rd induction coil 31c to food material container 4 induction heating.
In the present embodiment, the input of the first rectification circuit 33a is connected in the first line end L1 and the neutral end N (Neutral) of three phase supply equipment 5, the input of the second rectification circuit 33b is connected in the second line end L2 and the neutral end N of three phase supply equipment 5, and the input of the 3rd rectification circuit 33c is connected in the 3rd line end L3 and the neutral end N of three phase supply equipment 5.The first rectification circuit 33a, the second rectification circuit 33b and the 3rd rectification circuit 33c receive respectively first-phase input voltage Va, second-phase input voltage Vb and the third phase input voltage Vc of three phase mains, and rectification is first-phase commutating voltage Vr1, second-phase commutating voltage Vr2 and third phase commutating voltage Vr3 respectively.
Because first-phase input voltage Va, second-phase input voltage Vb and third phase input voltage Vc phase difference are each other 120 degree, therefore compared to the traditional heating device that uses single-phase input power, under the power circuit of same electrical flow valuve restriction, the heater 3 that the present invention has multiple induction coils can provide larger heat or the power of adding.In the present embodiment, first-phase input voltage Va, second-phase input voltage Vb and third phase input voltage Vc equal the phase voltage (Phase Voltage) of the three phase mains that three phase supply equipment 5 provides, but not as limit, in some embodiment, can be also the line voltage (Line Voltage) of the three phase mains that provides of three phase supply equipment 5.
In the present embodiment, the 3rd filter circuit 34c is the 3rd filter capacitor Ck3, and the 3rd current detection circuit 36c is the 3rd detection resistance R s3, but not as limit.Wherein the 3rd current detection circuit 36c detects the 3rd electric current I 3 that flows into the 3rd inverter circuit 35c, and corresponding the 3rd current detection signal Vs3 that produces is to power-supply controller of electric 37.
Similarly, in the present embodiment, the 3rd inverter circuit 35c comprises: the 5th switch Qc1, the 6th switch Qc2, the 5th capacitor C c1 and the 6th capacitor C c2, wherein, the 5th switch Qc1 and the 6th switch Qc2 are connected in series, and the link of the 5th switch Qc1 and the 6th switch Qc2 is connected in the first end 31c1 of the 3rd induction coil 31c.The 5th capacitor C c1 and the 6th capacitor C c2 are connected in series, and the link of the 5th capacitor C c1 and the 6th capacitor C c2 is connected in the second end 31c2 of the 3rd induction coil 31c.Wherein, power-supply controller of electric 37 is connected with the control end of the 5th switch Qc1 and the 6th switch Qc2, to control the staggered conducting of the 5th switch Qc1 and the 6th switch Qc2, makes the 3rd inverter circuit 35c produce the tertiary voltage V3 exchanging.In the present embodiment, in the time of the 5th switch Qc1 conducting, the 6th switch Qc2 cut-off, the electric energy of third phase commutating voltage Vr3 can sequentially be sent to the 3rd induction coil 31c via the 5th switch Qc1 and the 6th capacitor C c2.In the time of the 6th switch Qc2 conducting, the 5th switch Qc1 cut-off, the electric energy of third phase commutating voltage Vr3 can sequentially be sent to the 3rd induction coil 31c via the 5th capacitor C c1 and the 6th switch Qc2.
Refer to Fig. 6 and coordinate Fig. 5, wherein Fig. 6 is the circuit block diagram of the heater with multiple induction coils of another preferred embodiment of the present invention.Fig. 6 and Fig. 5 difference are that the heater 3 in Fig. 6 with multiple induction coils more comprises: First Line loop current testing circuit 38a, the second coil current testing circuit 38b and tertiary coil current detection circuit 38c, be connected in series in respectively the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c, in order to detect respectively the electric current of the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c, can use current transformer (CT) to realize, but not as limit.
Therefore, power-supply controller of electric 37 can pass through First Line loop current testing circuit 38a, the second coil current testing circuit 38b and tertiary coil current detection circuit 38c obtain the first induction coil 31a, the electric current of the second induction coil 31b and the 3rd induction coil 31c and be sent to microprocessor 321, make microprocessor 321 according to the first induction coil 31a, the electric current of the second induction coil 31b and the 3rd induction coil 31c judges the size of food material container 4, and first-phase Power supply unit 30a is controlled on corresponding selection ground, the part or all of operation of second-phase Power supply unit 30b and third phase Power supply unit 30c, make the first corresponding induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c optionally move.
For example, in the time that user places large-scale food material container 4, microprocessor 321 can make first-phase Power supply unit 30a, second-phase Power supply unit 30b and third phase Power supply unit 30c operation by controlling power-supply controller of electric 37; In the time that user places medium-sized food material container 4, microprocessor 321 can make first-phase Power supply unit 30a and second-phase Power supply unit 30b operation by controlling power-supply controller of electric 37, and makes third phase Power supply unit 30c out of service; In the time that user places small-sized food material container 4, microprocessor 321 can make first-phase Power supply unit 30a operation by controlling power-supply controller of electric 37, and make second-phase Power supply unit 30b and third phase Power supply unit 30c out of service.
Similarly, in the present embodiment, in the time that the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c move simultaneously, microprocessor 321 can be controlled the first inverter circuit 35a, the second inverter circuit 35b and the 3rd inverter circuit 35c output same-phase, same frequency or synchronous the first voltage V1, second voltage V2 and tertiary voltage V3 by power-supply controller of electric 37, to prevent that noise from producing.In the present embodiment, microprocessor 321 can be controlled by power-supply controller of electric 37 running frequency of the first switch Qa1, second switch Qa2, the 3rd switch Qb1, the 4th switch Qb2, the 5th switch Qc1 and the 6th switch Qc2d, for example 20k～50k Hz (hertz), adjusts the first induction coil 31a, the second induction coil 31b and the add heat of the 3rd induction coil 31c to food material container 4.
In the present embodiment, power-supply controller of electric 37 can be but not be defined as pulse frequency modulated controller (pulse frequency modulation controller, PFM controller) or digital signal processor (digital signal processor, DSP).In the present embodiment, the first switch Qa1, second switch Qa2, the 3rd switch Qb1, the 4th switch Qb2, the 5th switch Qc1 and the 6th switch Qc2 can be mos field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET), the switch element such as bipolar junction transistor (Bipolar Junction Transistor) or igbt (Insulated Gate Bipolar Transistor, IGBT).
In sum, the invention provides the heater with multiple induction coils, it uses heterogeneous formula input power, therefore compared to the traditional heating device that uses single-phase input power, under the power circuit of same electrical flow valuve restriction, can not cause the electric current of power circuit excessive, the heater that therefore the present invention has multiple induction coils can provide larger heat or the power of adding.In addition, the operation of each phase Power supply unit need to be by each self-corresponding power controller controls, but all by the operation of each phase Power supply unit of single power controller controls, therefore, User's Interface unit does not need to obtain the service data of each phase Power supply unit, do not need to control according to the complicated algorithm of service data of each phase Power supply unit the power-supply controller of electric operation that each phase Power supply unit is corresponding yet, its holistic cost is lower, and single power-supply controller of electric can use better simply algorithm, stability improves relatively.
What is more, multiple induction coils be arranged on identical heating region and axle center identical, when multiple induction coils are during simultaneously to relatively large food material container induction heating, can be effectively corresponding between multiple induction coils and relatively large food material container, therefore multiple induction coils can be equivalent to single equivalent induction coil high-power or heat greatly, make the efficiency of heating surface of multiple induction coils relatively high, heater can be promoted to the heat summation that adds of multiple induction coils to relatively large food material container induction heating amount.
In addition, the invention provides there is the heater of multiple induction coils can be according to the size of food material container, the part or all of operation of first-phase Power supply unit, second-phase Power supply unit and third phase Power supply unit is controlled on corresponding selection ground, corresponding the first induction coil, the second induction coil and the 3rd induction coil are optionally moved, therefore can be suitable for the food material container of all size.
The present invention must be appointed and be executed that craftsman thinks and be to modify as all by those skilled in the art, but scopes of de-as attached claim institute wish protection.
Claims (9)
1. a heater with multiple induction coils, comprises:
One first induction coil;
One second induction coil, identical with the axle center of this first induction coil, and arrange in the mode of Internal and external cycle;
One first-phase Power supply unit, is connected with this first induction coil, and framework is in receiving a first-phase input voltage and exporting one first voltage;
One second-phase Power supply unit, is connected with this second induction coil, and framework is in receiving a second-phase input voltage and exporting a second voltage;
One power-supply controller of electric, is connected in this first-phase Power supply unit and this second-phase Power supply unit, and controls this first-phase Power supply unit and the operation of this second-phase Power supply unit; And
One User's Interface unit, is connected with this power-supply controller of electric, in order to control this power-supply controller of electric operation;
Wherein, between this first-phase input voltage and this second-phase input voltage, there is a phase difference;
One First Line loop current testing circuit, is connected in series with this first induction coil, detects the electric current of this first induction coil; And
One second coil current testing circuit, is connected in series with this second induction coil, detects the electric current of this second induction coil;
Wherein, this User's Interface unit judges the size of a food material container according to the electric current of this first induction coil and this second induction coil, and the part or all of operation of this first-phase Power supply unit of control, corresponding selection ground and this second-phase Power supply unit, corresponding this first induction coil and this second induction coil are optionally moved.
2. the heater with multiple induction coils as claimed in claim 1, wherein this User's Interface unit comprises:
One input-output interface, the heating option that reception one user selects and an operation information that shows this heater with multiple induction coils; And
One microprocessor, this heating option of selecting according to this user is by the corresponding heat that adds of controlling this first induction coil and this second induction coil of this power-supply controller of electric.
3. the heater with multiple induction coils as claimed in claim 1, wherein this first voltage is same-phase, same frequency with this second voltage or synchronizes.
4. the heater with multiple induction coils as claimed in claim 1, wherein this first-phase Power supply unit, this second-phase Power supply unit and this power-supply controller of electric are arranged at same circuit board.
5. the heater with multiple induction coils as claimed in claim 1, wherein this first-phase Power supply unit comprises:
One first rectification circuit, receiving this first-phase input voltage rectification is a first-phase commutating voltage;
One first filter circuit, be connected in the output of this first rectification circuit, and framework is in the radio-frequency component of this first-phase commutating voltage of filtering; And
One first inverter circuit, is connected in this first filter circuit and this power-supply controller of electric, and wherein this first inverter circuit of this power controller controls moves to produce this first voltage to this first induction coil.
6. the heater with multiple induction coils as claimed in claim 5, wherein this first-phase Power supply unit more comprises one first current detection circuit, be connected between this first filter circuit and this first inverter circuit, to detect one first electric current that flows into this first inverter circuit, and corresponding one first current detection signal that produces is to this power-supply controller of electric.
7. the heater with multiple induction coils as claimed in claim 1, wherein this second-phase Power supply unit comprises:
One second rectification circuit, receiving this second-phase input voltage rectification is a second-phase commutating voltage;
One second filter circuit, be connected in the output of this second rectification circuit, and framework is in the radio-frequency component of this second-phase commutating voltage of filtering; And
One second inverter circuit, is connected in this second filter circuit and this power-supply controller of electric, and wherein this second inverter circuit of this power controller controls moves to produce this second voltage to this second induction coil.
8. the heater with multiple induction coils as claimed in claim 7, wherein this second-phase Power supply unit more comprises one second current detection circuit, be connected between this second filter circuit and this second inverter circuit, to detect one second electric current that flows into this second inverter circuit, and corresponding one second current detection signal that produces is to this power-supply controller of electric.
9. the heater with multiple induction coils as claimed in claim 1, more comprises:
One the 3rd induction coil, the 3rd induction coil is identical with the axle center of this first induction coil; And
One third phase Power supply unit, is connected with the 3rd induction coil, and framework is in receiving a third phase input voltage and exporting a tertiary voltage;
Wherein, this first-phase input voltage, this second-phase input voltage and this third phase input voltage have a phase difference each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169345.1A CN102238764B (en) | 2010-04-21 | 2010-04-21 | Heating device with a plurality of induction coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169345.1A CN102238764B (en) | 2010-04-21 | 2010-04-21 | Heating device with a plurality of induction coils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102238764A CN102238764A (en) | 2011-11-09 |
| CN102238764B true CN102238764B (en) | 2014-08-06 |
Family
ID=44888806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010169345.1A Active CN102238764B (en) | 2010-04-21 | 2010-04-21 | Heating device with a plurality of induction coils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102238764B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108684094A (en) * | 2018-04-11 | 2018-10-19 | 佛山市众拓科技有限公司 | The electromagnetic oven that more electromagnetic coils will not be interfered with each other using same frequency Synchronous Heating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631056A (en) * | 2002-06-26 | 2005-06-22 | 三井造船株式会社 | Induction heating method and apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4845432B2 (en) * | 2005-06-30 | 2011-12-28 | 三菱電機株式会社 | Induction heating cooker |
| JP4509061B2 (en) * | 2006-05-29 | 2010-07-21 | 三菱電機株式会社 | Induction heating device |
| JP4945409B2 (en) * | 2007-11-26 | 2012-06-06 | 日立アプライアンス株式会社 | Induction heating cooker |
| JP4717135B2 (en) * | 2009-10-02 | 2011-07-06 | 三菱電機株式会社 | Induction heating device |
-
2010
- 2010-04-21 CN CN201010169345.1A patent/CN102238764B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631056A (en) * | 2002-06-26 | 2005-06-22 | 三井造船株式会社 | Induction heating method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102238764A (en) | 2011-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI403679B (en) | Heating apparatus having plurality of induction coils | |
| JP5025698B2 (en) | Induction heating device | |
| CN100525551C (en) | Inverter circuit for an induction heating apparatus, cooking appliance having such circuit, and operating method | |
| CN107023861B (en) | Induction heating cooking apparatus | |
| US11064576B2 (en) | Induction heating and wireless power transferring device having improved resonant current detection accuracy | |
| CN103841679B (en) | Induction heating apparatus and the cooker using the induction heating apparatus | |
| CN105723603A (en) | High frequency series AC voltage regulator | |
| KR20110092070A (en) | Cooking apparatus using induction heeating | |
| EP3612004B1 (en) | Induction heating apparatus | |
| KR102040221B1 (en) | Induction heating device having improved interference noise canceling function and power control function | |
| JPH071469B2 (en) | Constant power supply device for electric heating device | |
| CN104850019B (en) | Control circuit and its control method and electromagnetic oven | |
| WO2015059802A1 (en) | Induction heating cooker | |
| CN102238764B (en) | Heating device with a plurality of induction coils | |
| CN106686785A (en) | Electromagnetic heating apparatus and control method therefor | |
| CN103167656A (en) | Chip circuit for commercial induction cooker and commercial induction cooker | |
| KR102165579B1 (en) | Induction heating device including different types of inverter circuits | |
| JP7233390B2 (en) | Induction heating coil and induction heating device | |
| KR102175638B1 (en) | Heating device including a plurality of sub working coils | |
| US11304267B2 (en) | Induction heating device having improved switch stress reduction structure | |
| JP5674896B2 (en) | Induction heating cooker | |
| JP5734390B2 (en) | Induction heating cooker | |
| JP5289537B2 (en) | Induction heating cooker | |
| CN206674225U (en) | The circuit system and cooking apparatus of protection circuit | |
| KR20210032666A (en) | An induction heating device having improved power control function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |