Cooking utensil, cooking utensil electromagnetic heating device and heating control method thereof

Abstract

The invention discloses a cooling utensil, a cooking utensil electromagnetic heating device and a heating control method thereof. The device comprises a rectifier bridge stack, a filter circuit, a discharge resistor, a transfer switch, a resonant switch transistor, a resonant module, a zero-crossing detection circuit and a control module, wherein the filter circuit comprises a filter inductor and a filter capacitor, one end of the filter inductor is connected with the first output end of the rectifier bridge stack, the other end of the filter inductor is connected with one end of the filter capacitor, and a first node is arranged between the other end of the filter inductor and one end of the filter capacitor; the discharge resistor is in parallel connection with the filter capacitor; one end of the transfer switch is connected with the other end of the filter capacitor and the other end is grounded; the resonant module is connected between the first node and the collector of the resonant switch transistor; the zero-crossing detection circuit is used for detecting inputted AC zero-crossing signals; and the control module executes control on the resonant switch transistor and the transfer switch respectively according to the zero-crossing signals to change the heating mode of the electromagnetic heating device. Thus, in the case of low-power intermittent heating, hard turn on of the switch transistor is avoided, and the switch transistor can be prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of living appliances, in particular to an electromagnetic heating device for cooking utensils, a cooking utensil with the electromagnetic heating device and a heating control method for the electromagnetic heating device. Background technique [0002] Related electromagnetic heating devices with a single IGBT tube usually use a parallel resonant circuit, wherein the resonance parameters of the parallel resonant circuit are generally set on the premise of realizing high-power operation. If the electromagnetic heating device operates continuously at low power, the related technology has the following disadvantages: first, it is difficult to control the voltage of the IGBT tube to turn on at zero crossing, and the IGBT tube will be turned on ahead of time, and the peak value of the transient current at the moment of turning on will damage the IGBT tube; Yes, the IGBT tube heats up seriously, and it is necessary...

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a kind of electromagnetic heating device of cooking utensil, and the electromagnetic heating device of this cooking utensil can solve the problem of hard opening of IGBT tube during intermittent heating

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