Energy-saving electric heating cooker

Abstract

The invention discloses an energy-saving electric heating cooker which adopts a nonmetal (purple sand, ceramic, ore, glass and the like) inner container. Infrared radiation material layers which are matched with each other are respectively arranged on the inner surface of a barrel / disc-shaped large-area heating device and on the outer surface of the inner container. The electric heating cooker increases the effective radiation and absorption area of infrared rays by the structural design of the surface and a covering layer, which not only greatly improves the heating function of the infrared radiation manner, but also can give attention to and exert the heating function of the conduction and convection manner. Therefore, the following beneficial effects are achieved: the heat efficiency is greatly increased, the heating speed is increased, the temperature of a shell is low, energy is saved, the heating area of the inner container is increased, the heating is uniform, the bursting is not easy, and the using is safe.

Description

technical field [0001] The invention relates to a cooking device heated by electric energy, in particular to an electric heating pot with fast, uniform, safe and energy-saving heating of non-metal inner containers such as purple sand, pottery, ore and glass. Background technique [0002] Because purple sand, ceramics and other non-metallic inner pot electric heating pots will not produce too many metal ions such as aluminum and will not fall off the non-stick coating and cause harm to human health, on the contrary, some materials can dissolve a variety of trace elements that are beneficial to the human body , and can make water weakly alkaline that is more beneficial to human health, make food taste better, and have the advantages of returning to natural flavors, etc. It has gradually been loved and used by more and more families. [0003] However, due to the physical characteristics of non-metallic materials such as purple sand and ceramics, such as low thermal conductivity...

AI Technical Summary

Problems solved by technology

The direct contact between them includes the contact at the bottom and the contact at the side. This method is easy to burst due to the uneven heating of the inner tank and the difference in thermal expansion between the inner tank and the heating device, which will bring trouble and trouble to the user. There are security risks

The way of not contacting and leaving gaps between them is mainly air convection heat transfer and radiation heat transfer. The heating device through air convection first heats the air and then transfers the heat to the inner tank through the hot air. This indirect heat transfer method speed Slower and hot air is easy to disperse, resulting in energy waste; and the infrared normal total emissivity of the surface of the aluminum plate commonly used in the radiation mode is very low, generally not more than 0.3, and the aluminum plate with a highly polished surface is as low as 0.03 , the infrared absorption rate of the surface of the liner is also low

Therefore, the current air convection heat transfer and radiation heat transfer methods that do not contact and leave gaps between them have the technical defects of low heat transfer efficiency, long cooking time, and waste of energy; and, because the heat of the heating device is difficult to Passing it out will also cause the temperature of the electric heating pot shell to be too high, which will cause hot hands and certain potential safety hazards.

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