Back pressure protection method and device of induction cooker, and induction cooker
A protection device and induction cooker technology, which is applied in the field of induction cooker, can solve the problems such as the noise of making pots and the large difference in characteristics, and achieve the effect of protecting the safety of use and avoiding the noise of making pots
Active Publication Date: 2021-01-29
GUANGDONG REAL DESIGN INTELLIGENT TECH
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Problems solved by technology
[0005] There are many materials for pots used in induction cookers, and pots of different materials or different usage conditions of pots lead to great differences in the characteristics of pots when they work on induction cookers, such as small-sized pots, honeycomb pots, partial pots, etc. When in use, the IGBT works in the limit state for a long time, and it will cause the IGBT to repeatedly enter the back pressure protection to adjust the PPG, causing the pot noise
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[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0054] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the embodiments of the present application.
[0055] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include ...
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The embodiment of the invention relates to a back pressure protection method and device of an induction cooker, and the induction cooker. The back voltage protection method of the induction cooker comprises the following steps of obtaining a first voltage of an IGBT collector in the heating process of the induction cooker, and judging whether the first voltage is higher than a first back voltage threshold value or not; judging whether the number of times that the first voltage is higher than the first back voltage threshold value is greater than a preset number of times within a preset time; and if so, acquiring a first turn-on time of a PPG of the induction cooker, controlling the turn-on time of the PPG to be less than the first turn-on time, and enabling the first voltage to be not higher than the first back voltage threshold. According to the back pressure protection method of the induction cooker, the IGBT of the induction cooker can be prevented from working in a limit state fora long time, pot hitting noise generated by the induction cooker is avoided, the use safety of the IGBT is protected, and the induction cooker is more intelligent.
Description
technical field [0001] The embodiment of the present application relates to the technical field of an induction cooker, in particular to a back pressure protection method and device for an induction cooker, and an induction cooker. Background technique [0002] Induction cooker, also known as induction cooker, is an electric cooking appliance made using the principle of electromagnetic induction heating. It is composed of high-frequency induction heating coil (ie excitation coil), high-frequency power conversion device, controller and other parts. [0003] The principle of the induction cooker is the phenomenon of electromagnetic induction, that is, the alternating current is used to pass through the coil to generate an alternating magnetic field with a constantly changing direction. Eddy currents will appear inside the pot in the alternating magnetic field, and the Joule heating effect of the eddy current makes the pot heat up to achieve heating. [0004] At present, the ...
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Login to View More IPC IPC(8): H05B6/36F24C7/06
CPCH05B6/36F24C7/06Y02B40/00
Inventor 汪军方桦黄伟活
Owner GUANGDONG REAL DESIGN INTELLIGENT TECH