Portable household lunch box with heating and refrigerating functions

Abstract

The invention provides a portable household lunch box with heating and refrigerating functions. The lunch box sequentially comprises a cover, an upper half box, a middle baffle and a lower half box which are connected from top to bottom, wherein an inner box is arranged in the lower half box, multiple PTC (positive temperature coefficient) heaters which are connected in parallel are embedded in surrounding walls of the upper half box, multiple semi-conductor chilling plates which are connected in parallel are embedded in surrounding walls of the lower half box, and the PTC heaters and the semi-conductor chilling plates are in circuit connection through switch lithium batteries or AC-to-DC power supplies. The lunch box can heat and preserve food simultaneously, solves the problem that the food placed in lunch boxes cannot be preserved, is simple in structure and convenient to maintain and comprises few components; the lunch box comprises no mechanical transmission components and is free of wear and noise and long in service life; refrigeration with a refrigerant is not required, the lunch box is absolutely environment-friendly; the lunch box is high in efficiency and low in power consumption.

Description

technical field [0001] The invention relates to a family portable lunch box, in particular to a family portable lunch box with heating and cooling functions. Background technique [0002] At present, the cooling or heating products on the market mainly include: car hot and cold cups (which can be converted to home use), and only for cooling or heating alone. In addition, there are car-mounted hot and cold lunch boxes, etc. The current products on the market are relatively expensive, and the functions are not perfect. There is only one single-thread cooling or heating product, and the main purpose is to use it in the car. It needs a conversion line to be used for home use. There are many items, and it is easy to cause safety hazards; the product is too large, the cost is too high, and the energy utilization rate is not high. Contents of the invention [0003] In view of the above technical problems, the present invention proposes a family portable lunch box that can simul...

AI Technical Summary

Problems solved by technology

The current products on the market are relatively expensive, and the functions are not perfect. There is only one single-thread cooling or heating product, and the main purpose is to use it in the car. It needs a conversion line to be used for home use. There are many items, and it is easy to cause safety hazards; the product is too large, the cost is too high and the energy utilization rate is not high

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