JPS61277191A - Electromagnetic cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electromagnetic cooker equipped with a fan motor for cooling an inverter circuit and the like.

[Prior art]

In conventional induction cookers, the rotation speed of the fan motor is constant, and the noise from the fan motor is not so noticeable when the output is at its maximum because the front of the boiling water during simmering is loud, but when the output is low, the noise from the fan motor is not so noticeable. The cooking sound is low, and the noise of the fan motor is bothersome, which sometimes makes the user feel uncomfortable and uneasy.

〔the purpose〕

The present invention reduces the noise of the fan motor during induction heating by adjusting the rotation speed of the fan motor according to the magnitude of the output of the induction heating coil section, thereby eliminating discomfort and anxiety caused by the noise. This is how it was done.

〔Example〕

1 includes an induction heating coil 2, a switching element 3 connected in series to the induction heating coil 2, and the induction heating coil 2.
This is an inverter circuit consisting of a capacitor 4 and a capacitor 4 forming a resonant circuit, and the inverter circuit 1 is driven by a drive circuit 6 according to the output level from the output adjustment circuit 5.

The output adjustment circuit 5 is for adjusting the heating output of the induction heating coil 2, and its output signal is input to the drive circuit 6 as described above, and is also input to the fan motor control circuit 7. It has become.

The fan motor control circuit 7 controls the rotation speed of the fan motor 8 for cooling the inverter circuit 1 etc., and increases the rotation speed of the fan motor 8 according to the output from the output adjustment circuit 5. This is a circuit that can be used to increase or decrease

Therefore, if the output signal from the Kanayama force adjustment circuit 5 is to increase the heating output of the induction heating coil 2, the same output signal is sent to the fan motor control circuit 7.
Therefore, the fan motor 8
The rotation speed is increased by the fan motor control circuit 7. On the other hand, when the output signal from the output adjustment circuit 5 acts in a direction to reduce the heating output of the induction heating coil 2, the rotation speed of the fan motor 8 is also reduced by the fan motor control circuit 7. That is, depending on the magnitude of the heating output of the induction heating coil 2, the fan motor 8
The number of revolutions is also increased or decreased.

For this reason, when the heating output of the induction heating coil 2 is large and the amount of water before boiling when cooking food is large, even if the fan motor 8 is operated at high speed, the noise generated by the fan motor 8 does not become too loud. When the heating output is small, the fan motor 8 also operates weakly, so the noise generated by the fan motor 8 naturally decreases, and the discomfort experienced in the conventional system is eliminated. Note that when the heating output of the induction heating coil 2 is small, the heat generated by the inverter circuit 1 is also small, so even if the amount of cooling air generated by the fan motor 8 is small, the purpose can be sufficiently achieved.

〔effect〕

The present invention provides an inverter circuit comprising an induction heating coil, a switching element connected in series to the induction heating coil, and a capacitor forming a resonant circuit together with the induction heating coil, and an output of the inverter circuit. In an electromagnetic cooker equipped with an output adjustment circuit for controlling the output adjustment circuit 11, a fan motor for cooling the inverter circuit etc. is adjusted according to the output level of the output adjustment circuit 11. - Equipped with a motor control circuit, the rotation speed of the fan motor does not increase unnecessarily, which saves power, and also prevents noise from the fan motor when operating at low heating output, making it easier for the user to use. This has the remarkable effect of preventing discomfort and anxiety.

[Brief explanation of the drawing]

The drawing shows a professional circuit diagram of the electromagnetic cooker of the present invention. 1: Inverter circuit, 2: Induction heating coil, 3 Niswitching element, 4: Capacitor, 5: Output adjustment circuit, 7-
Fan motor control circuit, 8: Fan motor 0

Claims (1)

[Claims] 1. An inverter circuit consisting of an induction heating coil, a switching element connected in series to the induction heating coil, and a capacitor that forms a resonant circuit together with the induction heating coil, and an output adjustment circuit that controls the output of the inverter circuit. An electromagnetic cooking device characterized by having a fan motor control circuit that adjusts the rotation speed of a fan motor that cools an inverter circuit, etc. according to the output level of the output adjustment circuit. vessel.