Induction heating cooker
A technology of induction heating and cooker, which is applied in the direction of induction heating, induction heating device, electric/magnetic/electromagnetic heating, etc. It can solve the problems of reducing inverter output and driving frequency, and achieves easy to use, energy-saving use, and restraint The effect of useless power supply
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Embodiment approach 1
[0031] (structure)
[0032] figure 1 It is an exploded perspective view showing Embodiment 1 of the induction heating cooker of this invention. like figure 1 As shown, on the upper part of the induction heating cooker 100, there is a top plate 4 on which a to-be-heated object 5 such as a pan is placed. The top plate 4 is provided with a first heating port 1 , a second heating port 2 , and a third heating port 3 as heating ports for inductively heating the object 5 to be heated. In addition, the induction heating cooker 100 includes a first heating unit 11 , a second heating unit 12 , and a third heating unit 13 corresponding to the heating ports 1 to 3 , and the object to be heated 5 can be placed on each of the heating ports 1 to 3 . for induction heating.
[0033] exist figure 1 Among them, on the front side of the main body, the first heating unit 11 and the second heating unit 12 are arranged side by side, and the third heating unit 13 is arranged approximately in the...
Embodiment approach 2
[0080] Figure 12 as well as Figure 13 is a figure showing Embodiment 2 of the present invention, refer to Figure 12 as well as Figure 13 Another example of the operation of the drive control unit 31 of the induction heating cooker 100 will be described. In addition, in Figure 12 as well as Figure 13 In the pair with Figure 8 as well as Figure 9 Parts having the same structure as those shown in the drawings are attached with the same symbols and their descriptions are omitted. Figure 12 as well as Figure 13 The drive control unit 31 is controlled with Figure 8 as well as Figure 9 The difference in the control of the drive control unit 31 is the change timing of the drive frequency f.
[0081] like Figure 12 as well as Figure 13 As shown, the drive control unit 31 performs control to reduce the high-frequency power after a predetermined additional period Te elapses after the current change amount ΔI becomes equal to or smaller than the set current change ...
Embodiment approach 3
[0087] Figure 14 It is a figure showing Embodiment 3 of the induction heating cooker of the present invention, refer to Figure 14 Description of induction heating cooker. In addition, in Figure 14 The drive circuit 150 has a pair with figure 2 Portions with the same configuration as the drive circuit 50 are given the same reference numerals and their descriptions are omitted. Figure 14 The drive circuit 150 with figure 2 The driving circuit 50 differs in that the driving circuit 150 has a plurality of resonant capacitors 24a, 24b.
[0088] Specifically, the drive circuit 150 has a configuration in which a resonant capacitor 24b connected in parallel to the resonant capacitor 24a is further provided. Therefore, in the drive circuit 150, a resonance circuit is formed by the heating coil 11a and the resonance capacitors 24a and 24b. Here, the capacitance of the resonant capacitors 24a and 24b is determined by the maximum heating power (maximum input power) required in...
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