CN102238764A - Heating device with a plurality of induction coils - Google Patents
Heating device with a plurality of induction coils Download PDFInfo
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- CN102238764A CN102238764A CN2010101693451A CN201010169345A CN102238764A CN 102238764 A CN102238764 A CN 102238764A CN 2010101693451 A CN2010101693451 A CN 2010101693451A CN 201010169345 A CN201010169345 A CN 201010169345A CN 102238764 A CN102238764 A CN 102238764A
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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 a plurality of induction coils.
Background technology
In recent years along with the progress of science and technology, the heater of people's culinary art no longer has only single kind to select, except the heater that utilizes the heating of gas fuel, multiple choices such as microwave oven, infrared-type baking box and electrothermal heating furnace are more arranged, these heaters miscellaneous respectively have its pluses and minuses, can be applicable to the occasion of the culinary art and the culinary art of various different food materials respectively, to satisfy the user of different demands.
In order simultaneously two cook utensils to be heated, in some traditional heating devices, two induction coils can be set in the different heating zone respectively, realizing simultaneously, and make two cook utensils can have different heating-up temperatures by the electric weight size that adjustment supplies power to each induction coil to two cook utensils heating.See also Fig. 1, it has the structural representation of the heater of two induction coils for tradition.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.When operation, the first induction coil 11a and the second induction coil 11b respectively can be to first cook utensil 2a that is positioned over the first heating region A1 and the second cook utensil 2b induction heating that is positioned over the second heating region A2.
Yet, as the first induction coil 11a and the second induction coil 11b during simultaneously to relatively large cook utensil induction heating (not shown), because of two induction coil 11a, can't be effectively corresponding between 11b and the bigger cook utensil, make two induction coil 11a, the efficiency of heating surface of 11b is lower, 1 pair of large-scale cook utensil induction heating amount of heater can't promote be the first induction coil 11a and the second induction coil 11b add the heat summation.
Moreover, traditional heating device 1 uses single phase poaer supply, and be converted to the required voltage pattern of the first induction coil 11a and the second induction coil 11b respectively and make its operation, as two induction coil 11a, when 11b heats simultaneously, can cause the input current of heater 1 excessive,, can't provide the heater 1 of heat more greatly or power so be subject to the electric power system of single phase poaer supply.
Therefore, how to develop a kind of heater that improves above-mentioned known techniques defective, real problem for the correlative technology field solution that presses at present with a plurality of induction coils.
Summary of the invention
The object of the present invention is to provide a kind of heater with a plurality of induction coils, it uses heterogeneous formula input power supply, compared to the traditional heating device that uses single-phase input power supply, under the power circuit of same electrical flow valuve restriction, therefore promptly can not cause the electric current of power circuit excessive, bigger heat or the power of adding can be provided.
Another object of the present invention is to provide a kind of heater with a plurality of induction coils, it uses heterogeneous formula input power supply, and the operation of each phase power supply power supply unit is by single power controller controls, therefore whole cost is lower, and can use better simply algorithm, stability improves relatively.In addition, the invention provides the heater with a plurality of induction coils can optionally move corresponding first induction coil, second induction coil and the 3rd induction coil according to the size of food materials container, therefore can be suitable for the food materials container of all size.
Another object of the present invention is to provide a kind of heater with a plurality of induction coils, can be effectively corresponding between its a plurality of induction coils and the food materials container, so a plurality of induction coils can equivalence be single equivalent induction coil high-power or heat greatly, make that the efficiency of heating surface of a plurality of induction coils is higher relatively, heater can promote relatively large food materials container induction heating amount and add the heat summation for a plurality of induction coils.
For reaching above-mentioned purpose, of the present invention one than the broad sense execution mode for a kind of heater with a plurality of induction coils is provided, comprise: first induction coil; Second induction coil is identical with the axle center of first induction coil; The first phase power supply power supply unit is connected with first induction coil, and framework is in receiving the first phase input voltage and exporting first voltage; The second phase power supply power supply unit is connected with second induction coil, and framework is in receiving the second phase input voltage and exporting second voltage; Power-supply controller of electric is connected in the first phase power supply power supply unit and the second power supply power supply unit mutually, and controls the first phase power supply power supply unit and second power supply power supply unit operation mutually; And user's interface unit, be connected with power-supply controller of electric, in order to move with the control power-supply controller of electric; Wherein, the first phase input voltage has a phase difference mutually with second between the input voltage.
In sum, the heater of the present invention with a plurality of induction coils can provide bigger heat or the power of adding.In addition, its whole cost is lower, and single power-supply controller of electric can use better simply algorithm, and stability improves relatively.What is more, can promote relatively large food materials container induction heating amount and add the heat summation for a plurality of induction coils.In addition, can be suitable for the food materials container of all size.
Description of drawings
Fig. 1: the structural representation that has the heater of two induction coils for tradition.
Fig. 2: be the structural representation of the heater with a plurality of induction coils of preferred embodiment of the present invention.
Fig. 3: be the circuit block diagram of the heater with a plurality of induction coils of preferred embodiment of the present invention.
Fig. 4: be the structural representation of the heater with a plurality of induction coils of another preferred embodiment of the present invention.
Fig. 5: be the circuit block diagram of the heater with a plurality of induction coils of another preferred embodiment of the present invention.
Fig. 6: be the circuit block diagram of the heater with a plurality of induction coils of another preferred embodiment of the present invention.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
1: traditional heating device 11a: first induction coil
11b: the second induction coil A1: first heating region
A2: the second heating region 2a: first cook utensil
2b: second cook utensil
3: heater with a plurality of induction coils
30a: the first phase power supply power supply unit 30b: the second phase power supply power supply unit
30c: third phase power supply power supply unit 31a: first induction coil
31b: the second induction coil 31c: the 3rd induction coil
31a1,31b1,31c1: the first end 31a2,31b2,31c2: second end
32: user's interface unit 32a, 32a: adjust element
321: microprocessor 322: input-output interface
33a: the first rectification circuit 33b: second rectification circuit
33c: the 3rd rectification circuit 34a: first filter circuit
34b: the second filter circuit 34c: the 3rd filter circuit
35a: the first inverter circuit 35b: second inverter circuit
35c: the 3rd inverter circuit 36a: 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 materials container 5: the 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: 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: second filter capacitor
Ck3: the 3rd filter capacitor B1: the thermal treatment zone
Rs1～Rs3: first～the 3rd detects resistance
Va: the first phase input voltage Vb: the second phase input voltage
Vc: third phase input voltage V1: first voltage
V2: the second voltage V3: tertiary voltage
Vr1: the first commutating phase voltage Vr2: the second commutating phase voltage
Vr3: third phase commutating voltage Ia: the first phase input current
Ib: the second phase input current Ic: third phase input current
I1～I3: first～the 3rd electric current L1～L3: first～the 3rd line end
N: neutral end
Vs1～Vs3: first～the 3rd current detection signal
Embodiment
Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different modes, it does not depart from the scope of the present invention, and explanation wherein and the accompanying drawing usefulness that ought explain in itself, but not in order to restriction the present invention.
See also Fig. 2, it is the structural representation of the heater with a plurality of induction coils of preferred embodiment of the present invention.As shown in Figure 2, the heater 3 with a plurality of 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 materials container 4 induction heating.User's interface unit 32 is arranged at the surface of the body of the heater 3 with a plurality of induction coils, in order to the heating option of selecting for use according to the user, for example close, open, add heat, heating time, mode of heating or mode of heating etc. rapidly at a slow speed, and the corresponding control first induction coil 31a and the second induction coil 31b add heat.
In present embodiment, user's interface unit 32 comprises for example two touch- tone adjustment element 32a, 32b, the user can heat the selection of option by adjusting element 32a, 32b realization, but not as limit, also can be 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 present operation information, for example closed condition, opening, add heat, heating time, mode of heating operation or mode of heating operation etc. rapidly at a slow speed at present.
As the first induction coil 31a and the second induction coil 31b during simultaneously to food materials container 4 induction heating, because the first induction coil 31a is identical with the axle center of the second induction coil 31b and be provided with in the mode of Internal and external cycle, so the first induction coil 31a and the second induction coil 31b both can be corresponding with relatively large food materials container 4 effectively, 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 induction coil 31a that wins relative with the efficiency of heating surface of the second induction coil 31b higher, 3 pairs of food materials containers of heater, 4 induction heating amounts can promote be the first induction coil 31a and the second induction coil 31b add the heat summation.
See also Fig. 3, it is the circuit block diagram of the heater with a plurality of induction coils of preferred embodiment of the present invention.As shown in Figure 3, the heater 3 with a plurality of 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 constitute the first phase power supply power supply unit 30a, and the first phase power supply power supply unit 30a receives the first phase input voltage Va and exports first voltage V1 to the first induction coil 31a, makes the first induction coil 31a to food materials 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 constitute the second phase power supply power supply unit 30b, and the second phase power supply power supply unit 30b receives the second phase input voltage Vb and exports second voltage V2 to the second induction coil 31b, makes the second induction coil 31b to food materials container 4 induction heating.
In present embodiment, heater 3 with a plurality of induction coils uses single power-supply controller of electric 37 to control the first phase power supply power supply unit 30a and the second power supply power supply unit 30b operation mutually simultaneously, and power-supply controller of electric 37 is connected by the circuit board of connecting line with user's interface unit 32.Therefore, user's interface unit 32 can be obtained the service data of each phase power supply power supply unit, for example the running frequency of the first voltage V1 and the second voltage V2.Owing to use single power-supply controller of electric 37, therefore whole cost can be lower, and user's interface unit 32 can use better simply algorithm to control power-supply controller of electric 37 operations, and stability improves relatively.In some embodiment, the first phase power supply power supply unit 30a, the second phase power supply power supply unit 30b and power-supply controller of electric 37 can be arranged on the same circuit board, and its stability improves relatively.
In 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 the first phase input voltage Va that receives three phase mains respectively and the second input voltage Vb mutually, and rectification is the first commutating phase voltage Vr1 and the second commutating phase voltage Vr2 respectively.Since the first phase input voltage Va with second mutually the phase difference of input voltage Vb be 120 to spend, therefore compared to the traditional heating device that uses single-phase input power supply, under the power circuit of same electrical flow valuve restriction, promptly can not cause the electric current of power circuit excessive, the heater 3 that the present invention has a plurality of induction coils can provide the first induction coil 31a and the second induction coil 31b bigger add heat or power.For example, if when making the first phase input current Ia input current Ib maximum be 10A (ampere) mutually with second because of the restriction of the current value of power circuit, compared to the traditional heating device that uses single-phase input power supply, if the maximum of same input current is 10A, the present invention has the maximum heating amount or the power of the heater 3 of a plurality of induction coils can be greater than the maximum heating amount or the power of 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 the difference filtering first commutating phase voltage Vr1 and the second commutating phase voltage Vr2.In 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 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 that exchanges.In present embodiment, when the first switch Qa1 conducting, second switch Qa2 ends, and the electric energy of the first commutating phase voltage Vr1 can be sent to the first induction coil 31a via the first switch Qa1 and the second capacitor C a2 in regular turn.When second switch Qa2 conducting, the first switch Qa1 ends, and the electric energy of the first commutating phase voltage Vr1 can be sent to the first induction coil 31a via the first capacitor C a1 and second switch Qa2 in regular turn.
Similarly, in 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 that exchanges.In present embodiment, when the 3rd switch Qb1 conducting, the 4th switch Qb2 can end, and the electric energy of the second commutating phase voltage Vr2 can be sent to the second induction coil 31b via the 3rd switch Qb1 and the 4th capacitor C b2 in regular turn.When the 4th switch Qb2 conducting, the 3rd switch Qb1 can end, and the electric energy of the second commutating phase voltage Vr2 can be sent to the second induction coil 31b via the 3rd capacitor C b1 and the 4th switch Qb2 in regular turn.
In present embodiment, the first current detection circuit 36a is the first detection resistance R s1, but not as limit, also can be 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 first electric current I 1 of the detection inflow first inverter circuit 35a, and the corresponding first current detection signal Vs1 that produces is to power-supply controller of electric 37.Similarly, in present embodiment, the second current detection circuit 36b is the second detection resistance R s2, but not as limit, also can be 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 second electric current I 2 of the detection inflow second inverter circuit 35b, and the corresponding second current detection signal Vs2 that produces is to power-supply controller of electric 37.Whether the power that power-supply controller of electric 37 can be judged the first induction coil 31a and the second induction coil 31b by the first current detection signal Vs1 and the second current detection signal Vs2 overrate, when overrate, corresponding reduction by 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 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 the input-output interface 322, controls the heat that adds of the first induction coil 31a and the second induction coil 31b by power-supply controller of electric 37 in order to the heating option of selecting for use according to the user.In present embodiment, input-output interface 322 is a touch-control display panel, in order to the selection of realization heating option, and utilizes touch-control display panel to show present operation information.In present embodiment, when the first induction coil 31a and the second induction coil 31b move simultaneously, microprocessor 321 can produce to prevent noise by the power-supply controller of electric 37 control first inverter circuit 35a and the second inverter circuit 35b output same-phase, same frequency or the synchronous first voltage V1 and the second voltage V2.
See also Fig. 4 and cooperate Fig. 2, wherein Fig. 4 is the structural representation of the heater with a plurality of induction coils of another preferred embodiment of the present invention.Fig. 4 and Fig. 2 difference are that the heater 3 that has a plurality of induction coils among Fig. 4 more comprises the 3rd induction coil 31c, make Fig. 4 heater 3 add the heater 3 of heat 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 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 is provided with.Similarly, as the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c during simultaneously to food materials 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, thus 3 pairs of food materials containers of heater, 4 induction heating amounts can promote be the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c add the heat summation.
For example, each phase input voltage (Va, Vb, Vc) be 230 volts, and because the restriction of the current value of power circuit makes the first phase input current Ia, the maximum of the second phase input current Ib and third phase input current Ic is 16 ampere-hours, tradition uses the maximum heating amount or the power of the heater of single phase poaer supply only to be 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 3600 watts respectively, therefore the present invention has the maximum heating amount of the also heater 3 of a plurality of induction coils or power and can promote and be about 10800 watts, greater than three times of the maximum heating amount of traditional heating device or power.
See also Fig. 5 and cooperate Fig. 3, wherein Fig. 5 is the circuit block diagram of the heater with a plurality of induction coils of another preferred embodiment of the present invention.Fig. 5 and Fig. 3 difference are that the heater 3 that has a plurality of induction coils among Fig. 5 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 constitute third phase power supply power supply unit 30c, and third phase power supply 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 materials container 4 induction heating.
In 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 the first phase input voltage Va, the second phase input voltage Vb and the third phase input voltage Vc of three phase mains respectively, and rectification is the first commutating phase voltage Vr1, the second commutating phase voltage Vr2 and third phase commutating voltage Vr3 respectively.
Because the first phase input voltage Va, the second phase input voltage Vb and third phase input voltage Vc phase difference each other are 120 degree, therefore compared to the traditional heating device that uses single-phase input power supply, under the power circuit of same electrical flow valuve restriction, the heater 3 that the present invention has a plurality of induction coils can provide bigger heat or the power of adding.In present embodiment, the first phase input voltage Va, the 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, also can be the line voltage (Line Voltage) of the three phase mains that provides of three phase supply equipment 5.
In 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 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 that exchanges.In present embodiment, when the 5th switch Qc1 conducting, the 6th switch Qc2 ends, and the electric energy of third phase commutating voltage Vr3 can be sent to the 3rd induction coil 31c via the 5th switch Qc1 and the 6th capacitor C c2 in regular turn.When the 6th switch Qc2 conducting, the 5th switch Qc1 ends, and the electric energy of third phase commutating voltage Vr3 can be sent to the 3rd induction coil 31c via the 5th capacitor C c1 and the 6th switch Qc2 in regular turn.
See also Fig. 6 and cooperate Fig. 5, wherein Fig. 6 is the circuit block diagram of the heater with a plurality of induction coils of another preferred embodiment of the present invention.Fig. 6 and Fig. 5 difference are that the heater 3 that has a plurality of induction coils among Fig. 6 more comprises: the first coil current testing circuit 38a, the second coil current testing circuit 38b and tertiary coil current detection circuit 38c, be connected in series in the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c respectively, in order to detect the electric current of the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c respectively, can use current transformer (CT) to realize, but not as limit.
Therefore, power-supply controller of electric 37 can pass through the first coil 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 is judged the size of food materials container 4, and the corresponding selection ground control first phase power supply power supply unit 30a, the part or all of operation of the second phase power supply power supply unit 30b and third phase power supply power supply unit 30c makes the first corresponding induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c optionally move.
For example, when the user placed large-scale food materials container 4, microprocessor 321 can make the first phase power supply power supply unit 30a, the second phase power supply power supply unit 30b and third phase power supply power supply unit 30c operation by control power-supply controller of electric 37; When the user places medium-sized food materials container 4, microprocessor 321 can by control power-supply controller of electric 37 make the first phase power supply power supply unit 30a with second mutually power supply power supply unit 30b move, and make third phase power supply power supply unit 30c out of service; When the user placed small-sized food materials container 4, microprocessor 321 can make first phase power supply power supply unit 30a operation by control power-supply controller of electric 37, and made the second phase power supply power supply unit 30b and third phase power supply power supply unit 30c out of service.
Similarly, in present embodiment, when the first induction coil 31a, the second induction coil 31b and the 3rd induction coil 31c move simultaneously, microprocessor 321 can produce to prevent noise by the power-supply controller of electric 37 control first inverter circuit 35a, the second inverter circuit 35b and the 3rd inverter circuit 35c output same-phase, same frequency or the synchronous first voltage V1, the second voltage V2 and tertiary voltage V3.In present embodiment, microprocessor 321 can be by the running frequency of power-supply controller of electric 37 the control 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 3rd induction coil 31c heat that adds to food materials container 4.
In 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 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), (Insulated Gate Bipolar Transistor IGBT) waits switch element for bipolar junction transistor (Bipolar Junction Transistor) or igbt.
In sum, the invention provides heater with a plurality of induction coils, it uses heterogeneous formula input power supply, therefore compared to the traditional heating device that uses single-phase input power supply, under the power circuit of same electrical flow valuve restriction, promptly can not cause the electric current of power circuit excessive, so the heater of the present invention with a plurality of induction coils can provide bigger heat or the power of adding.In addition, the operation of each phase power supply power supply unit need be by each self-corresponding power controller controls, but all by the operation of each phase power supply 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 power supply unit, do not need to use complicated algorithm to control a power-supply controller of electric operation of each phase power supply power supply unit correspondence according to the service data of each phase power supply power supply unit yet, its whole cost is lower, and single power-supply controller of electric can use better simply algorithm, and stability improves relatively.
What is more, a plurality of induction coils be arranged on identical heating region and the axle center identical, when a plurality of induction coils during simultaneously to relatively large food materials container induction heating, can be effectively corresponding between a plurality of induction coils and the relatively large food materials container, therefore a plurality of induction coils can equivalence be single equivalent induction coil high-power or heat greatly, make that the efficiency of heating surface of a plurality of induction coils is higher relatively, heater can promote relatively large food materials container induction heating amount and add the heat summation for a plurality of induction coils.
In addition, the invention provides the heater with a plurality of induction coils can be according to the size of food materials container, the part or all of operation of the control of corresponding selection the ground first phase power supply power supply unit, the second phase power supply power supply unit and third phase power supply power supply unit, corresponding first induction coil, second induction coil and the 3rd induction coil are optionally moved, therefore can be suitable for the food materials container of all size.
The present invention must be appointed by those skilled in the art and executes that the craftsman thinks and be to modify as all, yet does not take off the scope as the desire protection of attached claim institute.
Claims (10)
1. heater with a plurality of induction coils comprises:
One first induction coil;
One second induction coil is identical with the axle center of this first induction coil;
One first phase power supply power supply unit is connected with this first induction coil, and framework is in receiving one first phase input voltage and exporting one first voltage;
One second phase power supply power supply unit is connected with this second induction coil, and framework is in receiving one second phase input voltage and exporting one second voltage;
One power-supply controller of electric is connected in this first phase power supply power supply unit and this second power supply power supply unit mutually, and controls this first phase power supply power supply unit and this second power supply power supply unit operation mutually; 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, this first phase input voltage second has a phase difference mutually with this between the input voltage.
2. the heater with a plurality of induction coils as claimed in claim 1, wherein this user's interface unit comprises:
One input-output interface receives the heating option that a user selects for use and shows an operation information of the heater that this has a plurality of induction coils; And
One microprocessor, this heating option of selecting for use according to this user is by the heat that adds of this power-supply controller of electric this first induction coil of corresponding control and this second induction coil.
3. the heater with a plurality of induction coils as claimed in claim 1 more comprises:
One first coil 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 is judged the size of a food materials container according to the electric current of this first induction coil and this second induction coil, and the control of corresponding selection ground this first phase power supply power supply unit and this second part or all of operation of power supply power supply unit mutually, corresponding this first induction coil and this second induction coil are optionally moved.
4. the heater with a plurality of induction coils as claimed in claim 1, wherein this first voltage and this second voltage are same-phase, same frequency or synchronous.
5. the heater with a plurality of induction coils as claimed in claim 1, wherein this first phase power supply power supply unit, this second phase power supply power supply unit and this power-supply controller of electric are arranged at same circuit board.
6. the heater with a plurality of induction coils as claimed in claim 1, wherein this first phase power supply power supply unit comprises:
One first rectification circuit, receiving this first phase input voltage and rectification is one first commutating phase 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 commutating phase 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 operation of this power controller controls is to produce this first voltage to this first induction coil.
7. the heater with a plurality of induction coils as claimed in claim 6, wherein this first phase power supply power supply unit more comprises one first current detection circuit, be connected between this first filter circuit and this first inverter circuit, with one first electric current of this first inverter circuit of detection inflow, and corresponding one first current detection signal that produces is to this power-supply controller of electric.
8. the heater with a plurality of induction coils as claimed in claim 1, wherein this second phase power supply power supply unit comprises:
One second rectification circuit, receiving this second phase input voltage and rectification is one second commutating phase 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 commutating phase 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 operation of this power controller controls is to produce this second voltage to this second induction coil.
9. the heater with a plurality of induction coils as claimed in claim 8, wherein this second phase power supply power supply unit more comprises one second current detection circuit, be connected between this second filter circuit and this second inverter circuit, with one second electric current of this second inverter circuit of detection inflow, and corresponding one second current detection signal that produces is to this power-supply controller of electric.
10. the heater with a plurality of 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 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010169345.1A CN102238764B (en) | 2010-04-21 | 2010-04-21 | Heating device with a plurality of induction coils |
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| 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 |
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| CN102238764A true CN102238764A (en) | 2011-11-09 |
| CN102238764B CN102238764B (en) | 2014-08-06 |
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| CN201010169345.1A Active CN102238764B (en) | 2010-04-21 | 2010-04-21 | Heating device with a plurality of induction coils |
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Cited By (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 |
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| CN1631056A (en) * | 2002-06-26 | 2005-06-22 | 三井造船株式会社 | Induction heating method and apparatus |
| JP2007012482A (en) * | 2005-06-30 | 2007-01-18 | Mitsubishi Electric Corp | Induction heating cooker |
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| JP2009129737A (en) * | 2007-11-26 | 2009-06-11 | Hitachi Appliances Inc | Induction heating cooking device |
| JP2010003706A (en) * | 2009-10-02 | 2010-01-07 | Mitsubishi Electric Corp | Induction heating device |
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| 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 |
| JP2007012482A (en) * | 2005-06-30 | 2007-01-18 | Mitsubishi Electric Corp | Induction heating cooker |
| JP2007317587A (en) * | 2006-05-29 | 2007-12-06 | Mitsubishi Electric Corp | Induction heating device |
| JP2009129737A (en) * | 2007-11-26 | 2009-06-11 | Hitachi Appliances Inc | Induction heating cooking device |
| JP2010003706A (en) * | 2009-10-02 | 2010-01-07 | Mitsubishi Electric Corp | Induction heating device |
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| 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 |
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| CN102238764B (en) | 2014-08-06 |
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