Electromagnetic heating kettle with high electromagnetic compatibility

Abstract

The invention discloses an electromagnetic heating kettle with high electromagnetic compatibility, relates to the technical field of kitchen cooking equipment and solves the problem of larger electromagnetic interference to a power grid in the prior art. The electromagnetic heating kettle with high electromagnetic compatibility, which is disclosed by the invention, comprises a kettle body, a kettle liner, an electromagnetic wire coil and an electric control device. An inner cavity for placing the kettle liner is arranged in the kettle body; the electric control device comprises a master control board and an operating board; a strong and weak current isolation device is arranged between the operating board and the master control board; a signal detection device is arranged in the kettle body; the signal detection device passes through the electromagnetic wire coil to be arranged and is connected with the operating board through a weak current signal wire; the signal detection device comprises a wireless earthed metal part; and the metal part can protrude in the inner cavity. The invention is mainly used for the electromagnetic heating kettle and the electromagnetic interface to the power grid can be reduced. For example, the electromagnetic heating kettle is applied to an IH (Induction Heating) pressure cooker, an IH rice cooker, an electromagnetic heating saucepan and the like.

Description

technical field [0001] The invention relates to the technical field of kitchen cooking equipment, in particular to an electromagnetic heating pot with high electromagnetic compatibility. Background technique [0002] With the continuous development of science and technology, electromagnetic heating technology has been further used in kitchen cooking equipment, such as: electromagnetic heating rice cooker (IH rice cooker), electromagnetic heating pressure cooker (IH pressure cooker), electromagnetic heating stew pot, etc. It belongs to the category of electromagnetic heating pot. Since more magnetic fields are generated during electromagnetic heating, these magnetic fields will be conducted to the power supply of the electromagnetic heating pot through the circuit boards, electronic components, and wires inside the electromagnetic heating pot, causing electromagnetic interference to the power grid. [0003] In the process of realizing and using the above-mentioned electromag...

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Problems solved by technology

[0004] 1. In order to shield the electromagnetic interference caused by the electric grid in the prior art, in addition to designing the filter circuit, it is also necessary to wind a filter ring on the power line at the power socket. The filter ring generally uses a magnetic ring, or a capacitor, or an inductance. , the cost of these accessories used as a filter ring is relatively high, resulting in a relatively high cost of the electromagnetic heating pot

[0005] 2. Electromagnetic heating generally has a better heating power. When using lower heating power for heating, it is necessary to forcibly pull down the control current of the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), causing the circuit There are more frequency components in the medium signal, resulting in greater electromagnetic interference to the power grid. Therefore, when the electromagnetic heating pot is heated with low power for slow fire heating, the electromagnetic interference to the power grid is greater, and it is difficult to pass the electromagnetic interference test.

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