induction heating cooker
A technology of induction heating and cooking equipment, which is applied in induction heating, induction heating devices, electric/magnetic/electromagnetic heating, etc., can solve the problems of reducing driving frequency, reducing inverter output, etc., and achieves the effect of good convenience
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Embodiment approach 1
[0031] (structure)
[0032] figure 1 It is an exploded perspective view showing the induction heating cooker of Embodiment 1.
[0033] Such as figure 1 As shown, on the upper part of the induction heating cooker 100, there is a top plate 4 on which an object to be heated 5 such as a pan is placed. On the top plate 4, a first heating port 1, a second heating port 2, and a third heating port 3 are provided as heating ports for inductively heating the object 5 to be heated, and a first heating port is provided corresponding to each heating port. The unit 11 , the second heating unit 12 , and the third heating unit 13 can place the object to be heated 5 for each heating port for induction heating.
[0034] In Embodiment 1, the first heating unit 11 and the second heating unit 12 are arranged side by side on the front side of the main body, and the third heating unit 13 is provided approximately in the center inside the main body.
[0035] In addition, the arrangement of each h...
Embodiment approach 2
[0175] In Embodiment 2, details of the drive circuit 50 in Embodiment 1 described above will be described.
[0176] Figure 15 It is a figure which shows a part of the drive circuit of the induction heating cooker of Embodiment 2. In addition, in Figure 15 In FIG. 2 , only a part of the configuration of the drive circuit 50 according to Embodiment 1 is shown.
[0177] Such as Figure 15 As shown, the inverter circuit 23 includes a set of branches composed of two switching elements (IGBT23a, 23b) connected in series between the positive and negative bus bars and diodes 23c, 23d respectively connected in antiparallel to the switching elements. .
[0178] IGBT23a and IGBT23b are turned on and off by a drive signal output from control unit 45 .
[0179] The control unit 45 turns the IGBT 23b into the off state while the IGBT 23a is turned on, and turns the IGBT 23b into the on state while the IGBT 23a is turned off, and outputs a drive signal that turns on and off alternatel...
Embodiment approach 3
[0197] In Embodiment 3, an inverter circuit 23 using a full bridge circuit will be described.
[0198] Figure 17 It is a figure which shows a part of the drive circuit of the induction heating cooker of Embodiment 3. In addition, in Figure 17 In FIG. 2 , only points different from the drive circuit 50 of Embodiment 1 described above are shown.
[0199] In Embodiment 3, two heating coils are provided for one heating port. The two heating coils have different diameters, for example, and are concentrically arranged. Here, the heating coil with a small diameter is called an inner coil 11b, and the heating coil with a large diameter is called an outer coil 11c.
[0200] In addition, the number and arrangement of the heating coils are not limited thereto. For example, a configuration may be adopted in which a plurality of heating coils are arranged around a heating coil arranged in the center of the heating port.
[0201] The inverter circuit 23 includes three sets of branch...
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