Electric cooker

Abstract

The present invention provides an electric rice cooker. It is characterized by that said electric rice cooker includes the following several portions: external shell, cooker body placed in the external shell interior, internal container placed in the cooker body interior, upper cover placed on the upper portion of external shell and can be formed into relatively-closed structure together with the internal container and infrared heater placed in the bottom portion and/or side portion of said external shell. Said electric rice cooker not only has high heating efficiency, but also can effectively save energy.

Description

technical field [0001] The invention relates to the field of electric rice cookers, in particular to an electric rice cooker heated by an infrared heater. Background technique [0002] There are three modes of heat transfer: conduction, convection, and radiation. Among them, radiation has the highest utilization rate of heat, but it is hardly used in rice cookers. [0003] At present, the heating methods of electric rice cookers are nothing more than the following two types: electric hot plate heating and electromagnetic heating. The heating of the electric heating plate is to heat the inner tank and food by means of heating wire and heat transfer of cast aluminum; the electromagnetic heating is to use the alternating magnetic field generated by the coil plate to heat the inner tank itself, and heat the food by means of conduction and convection . The above two heating methods mainly transfer heat through heat conduction. The disadvantages are that the heat loss is large,...

AI Technical Summary

Problems solved by technology

The above two heating methods mainly transfer heat through heat conduction. The disadvantages are that the heat loss is large, the utilization rate is low, and there are special requirements for the material of the inner pot. Generally, it is required to use materials such as aluminum with high thermal conductivity, while ceramics, etc. are rich in Nutritious, healthy and hygienic materials, due to their low thermal conductivity, large difference in expansion coefficient and metal, easily lead to uneven heating, easy cracking, slow heat transfer speed, difficult shape and radian technology, etc.

[0004] The Chinese patent No. 98210376.X discloses a kind of electric rice cooker, which utilizes an electric heating plate or heating pipe to heat, and coats a layer of infrared coating on the electric heating plate or heating pipe exposed in the air. The method is still based on heat conduction, supplemented by heat radiation, and the exposed electric heating plate or heating pipe is likely to cause debris and moisture to accumulate under the electric heating plate or heating pipe, which is not easy to clean and may cause danger

[0005] Japanese patent application No. 2000-251883 discloses an electric rice cooker with an infrared heater, and it has a reflective plate under the heat source, but when the reflective plate becomes blurred or otherwise, the reflective ability will decrease In some cases, the reflection effect decreases, causing the surface temperature of the reflector to increase, and may even eventually lead to the melting of the reflector

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