Electromagnetic induction heating device and its multi-resonant circuit

Abstract

The present invention relates to an electromagnetic induction heating device and its multi-resonant circuit. The multi-resonant circuit includes: a first resonant circuit connected with a first synchronous circuit, driven by an IGBT1 whose input end is connected to a first driver; a second synchronous circuit connected The second resonant circuit is driven by the IGBT2 whose input terminal is connected to the second driver; and, the conversion circuit selects the first synchronous circuit or the second synchronous circuit through the conversion circuit, and converts the first and second resonant circuits into a parallel state at the same time Work. The electromagnetic induction heating device with the multi-resonance circuit can realize three working modes of inner loop coil, outer loop coil and parallel inner loop coil heating, the switching control of the working mode is reliable, and it can realize large-area uniform heating and wide-power continuous heating.

Description

technical field [0001] The invention relates to electromagnetic heating technology, in particular to a multi-resonance circuit for an electromagnetic induction heating device and an electromagnetic induction heating device equipped with the multi-resonance circuit, such as a double-ring fire induction cooker, an electric rice cooker, and the like. Background technique [0002] The traditional induction cooker has only one heating unit, which cannot better meet the needs of various cooking, such as stir-frying, cooking and so on. This kind of induction cooker generally has the following two problems: 1. The heating area is small and the firepower is uneven; 2. The continuous power range is not low. Generally, the minimum continuous power range is about 1000W. This will seriously affect the user's cooking experience. The small and uneven area will lead to poor frying and frying effects. Some food at the bottom of the pot has been burnt, but most of the food is still raw; the c...

AI Technical Summary

Problems solved by technology

[0002] The traditional induction cooker has only one heating unit, which cannot better meet various cooking needs, such as stir-frying, cooking, etc.

This kind of induction cooker generally has the following two problems: 1. The heating area is small and the firepower is uneven; 2. The continuous power level is not low. Generally, the lowest continuous power level is about 1000W

This will seriously affect the user's cooking experience. The small and uneven area will lead to poor frying and frying effects. Some food at the bottom of the pot has been burnt, but most of the food is still raw; the continuous power level should not be low, and it must be small The power is usually achieved intermittently with high power in proportion, which will affect the cooking effect. For example, when frying eggs or pancakes, due to the instantaneous high power, the bottom of the food is often pasted, and the upper layer is still raw; when cooking soup, keep boiling. , high-power intermittent heating is not easy to overflow, or the soup taste is very light, it is difficult to control the soup effect

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