Power-supply-free re-heatable lunch box

Abstract

The invention discloses a power-supply-free re-heatable lunch box, comprising a shell, a lunch box component and a heating component; the lunch box comprises a box body and a box cover; the bottom of the box body is of single-layer aluminum structure, the sidewall of the box body is of double-layer aluminum hollow structure, the sidewall is at least partially extended down out of the bottom wall to form extension portions which cooperate to form a circular raised edge; the heating component comprises a startup module and a heating module; the heating module is mounted within the circular raised edge and is in contact with the bottom wall of the box body; the heating module comprises a sealed bag that is formed by combining a polyester film layer, an aluminum foil layer and a tinfoil layer, and oversaturated sodium acetate solution and a memory alloy sheet are arranged in the sealed bag; by extruding the memory alloy sheet through the startup module and deforming the memory alloy sheet, the oversaturated sodium acetate solution in the sealed bag is caused to release heat through phase change, and a meal in the box body is heated. The power-supply-free re-heatable lunch box has the advantages of good portability, high heating efficiency and reusability.

Description

technical field [0001] The invention belongs to the technical field of heating lunch boxes, in particular to a reheatable lunch box without power supply. Background technique [0002] In many poverty-stricken areas of our country, children usually have to climb mountains and trek for several kilometers to go to school. Bring lunch to school, and you can't have a hot lunch. Due to long-term irregular and unhealthy diet, many children have problems such as anorexia and nutritional deficiencies, which seriously affect the healthy growth of children. In addition, among the majority of office workers, it is also unhealthy to eat outside, and it is inconvenient to heat up their own lunch. Although there are many heatable lunch boxes, such as ordinary plug-in lunch boxes, USB rechargeable heating lunch boxes, and some self-heating instant rice using the principle of quicklime meeting water to generate heat, these products are either expensive or harmful to the use environment. M...

AI Technical Summary

Problems solved by technology

[0002] In many poverty-stricken areas of our country, children usually have to climb mountains and trek for several kilometers to go to school. Bringing lunch to school and not being able to have a hot lunch

Due to long-term irregular and unhealthy diet, many children have problems such as anorexia and nutritional deficiencies, which seriously affect the healthy growth of children

In addition, among the majority of office workers, it is also unhealthy to eat outside, and it is inconvenient to heat up their own lunch

Although there are many heatable lunch boxes, such as ordinary plug-in lunch boxes, USB rechargeable heating lunch boxes, and some self-heating instant rice using the principle of quicklime meeting water to generate heat, these products are either expensive or harmful to the use environment. Many requirements such as power supply, or only one-time use, are not suitable for children in mountainous areas

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