Lunch box heated by batteries

Abstract

The invention discloses a lunch box heated by a batteries and relates to the technical field of food heating. The lunch box comprises a box body, a heating sheet, a metal lunch box and a battery pack,wherein the heating sheet is arranged in the box body, the periphery of the heating sheet is tightly connected with the side wall of the box body, the metal lunch box is detachably arranged in the box body, the lower end face of the metal lunch box is attached to the heating sheet, the heating sheet comprises a heat conducting sheet and PTC heating sheets, the heat conducting sheet is provided with a plurality of PTC heating sheets, and the PTC heating sheets are treated by a common negative electrode. The heat conducting sheet is the negative electrode for the PTC heating sheets, the batterypack is arranged between the heating sheet and the bottom of the box body, and the battery pack is electrically connected with the heating sheet. The lunch box is reasonable in design, the heating piece is directly in contact with the metal lunch box container for heating, water is not needed, the voltage is completely harmless to a human body, the batteries are arranged in the lunch box, the lunch box is convenient to carry and use, steam is not generated in the heating process, the risk of scalding is avoided, foods are sealed in the metal lunch box in the heating process, no smell diffuses, and no noise is generated in the heating process.

Description

technical field [0001] The invention relates to the technical field of food heating, in particular to a lunch box heated by batteries. Background technique [0002] Lunch box is a box specially used to hold meals, also known as bento box, mostly made of aluminum, stainless steel, or plastic. Lunch boxes include plastic lunch boxes, insulated lunch boxes, and ordinary lunch boxes. The thermal insulation lunch box is an ordinary lunch box with a thermal insulation shell, which is filled with foam plastic in the inner and outer layers, and then coated with a metal film on the inner layer. Reduce heat loss from three aspects: conduction, radiation, and convection. An electric heating device is added between the lunch box and the shell again to supplement the loss of heat, so that the food remains at a certain higher temperature. [0003] In the current heating lunch box or thermal insulation lunch box, the heating plate is driven by 220V AC mains, and the water is heated to b...

AI Technical Summary

Problems solved by technology

It has the following disadvantages: 1. It uses 220V AC power supply, which has potential safety hazards; 2. It must be plugged in for use, and the use scene must have a socket, which is inconvenient to use; 3. High-temperature steam is emitted during the heating process, and there is a risk of burns; 4. Heating During the process, the taste of the food will be released with the steam, which will affect the environmental smell; 5. The water will boil during the heating process, and the noise will be reduced

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