Electromagnetic-heating cooking utensil, and heating control circuit and control method thereof
A technology for heating control circuits and cooking utensils, applied in induction heating control, cooking utensils, induction heating, etc., can solve the problems of low heating efficiency, unstable vector magnetic field, unstable synchronous circuit, etc., and achieve the effect of improving heating efficiency
Active Publication Date: 2019-10-18
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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Problems solved by technology
However, there will be a problem in this scheme: since the inner and outer ring coils are placed inside the same cooker, the distance between them is relatively close. When the two coils work at the same time, the magnetic field between them will produce mutual coupling interference. Each independently resonates, the work is not synchronous, sometimes the magnetic field is superimposed in the same direction, sometimes it is superimposed in the opposite direction, the synthesized vector magnetic field is unstable, resulting in unstable synchronous circuit, low heating efficiency, and even damage to the switch tube, affecting product life
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[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0025] The heating control circuit of the electromagnetic heating cooking appliance, the electromagnetic heating cooking appliance and the heating control method of the electromagnetic heating cooking appliance proposed by the present invention will be described below with reference to the accompanying drawings.
[0026] figure 1is a schematic block diagram of a heating control circuit of an electromagnetic heating cooking appliance according to an embodiment of the present invention. figure 2 is a schematic diagram of a heatin...
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The invention discloses an electromagnetic-heating cooking utensil, and a heating control circuit and control method thereof. The circuit comprises a first resonance unit, a second resonance unit, a first power switch, a second power switch, a first synchronization unit, a second synchronization unit and a control unit, wherein the first synchronization unit outputs a first synchronization signalby detecting the voltage between two ends of the first resonance unit; the second synchronization unit outputs a second synchronization signal by detecting the voltage between two ends of the second resonance unit; and the control unit generates a driving signal, which drives the first power switch, by selecting the first synchronization signal, generates a driving signal, which drives the secondpower switch, by selecting the second synchronization signal and generates a driving signal, which drives the first power switch and the second power switch, by selecting one of the first synchronization signal and the second synchronization signal according to the heating mode of the electromagnetic-heating cooking utensil. Therefore, heating efficiency is improved, and the service life of the power switches is prolonged.
Description
technical field [0001] The invention relates to the technical field of household appliances, in particular to a heating control circuit for an electromagnetic heating cooking appliance, an electromagnetic heating cooking appliance and a heating control method for an electromagnetic heating cooking appliance. Background technique [0002] Most of the electromagnetic heating cooking utensils (such as induction cooker, electric rice cooker, electric pressure cooker, etc.) use one coil for heating, and most of its firepower is concentrated near the center of the bottom of the pot. Due to the excessive concentration of firepower, the heating is uneven, and users complain about the poor cooking effect. [0003] At present, some cookers use the heating scheme of the inner and outer ring-shaped double-coil disks to form two independent resonance systems, and the effect has been greatly improved. However, the two resonance systems use their own independent synchronous circuits to work...
Claims
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Login to View More IPC IPC(8): A47J27/00A47J27/08A47J36/24H05B6/06
CPCA47J27/00A47J27/08A47J36/2483H05B6/06
Inventor 曾露添雷俊邹伟王云峰邢凤雷
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD