Portable Lunchbox with Switching Device for Heating and Steaming
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Solution Overview
Problem
Existing portable lunch boxes primarily only allow for food heating, lacking the versatility to cook or steam food, and often have complex and expensive structures.
Innovation Solution
A portable lunch box with a switching device that controls a gas connection between a heating cavity and a food cavity, enabling both heating and steaming by switching between sealed and open states, allowing for flexible food preparation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lunchbox includes both heating and steaming functions, then food preparation versatility is improved, but device complexity increases
Solution Approach 1:
The lunchbox integrates multiple food preparation functions (heating, steaming, cooking) into a single device. The heating element can operate in different modes: direct heating when the food container is placed directly on the element, or steaming when water is added to form a steam generation cavity. This multi-functionality resolves the contradiction by providing versatile food preparation capabilities without requiring separate devices for each function.
Solution Approach 2:
The lunchbox employs a removable food container that can be positioned in different configurations. The container may be placed directly on the heating element for heating mode, or positioned above the element with water in the base to enable steaming mode. This dynamic reconfigurability allows the same device structure to adapt to different preparation needs, achieving versatility without proportional increases in device complexity.
2Adaptability or versatility
If a lunchbox includes both heating and steaming functions, then food preparation versatility is improved, but manufacturing cost increases
Solution Approach 1:
The lunchbox uses a single heating element that serves multiple purposes: direct heating of food and indirect steam generation when water is present. This eliminates the need for separate heating and steaming components, reducing manufacturing costs while maintaining food preparation versatility. The same basic structure supports both functions through operational flexibility rather than structural complexity.
3Adaptability or versatility
If the lunchbox is designed for both heating and steaming, then adaptability is improved, but structure becomes more complex
Solution Approach 1:
The lunchbox structure remains simple and fixed, while adaptability is achieved through dynamic user actions: adding or removing water, and positioning the food container in different locations. The removable food container can be placed directly on the heating element for heating mode or positioned above water for steaming mode. This dynamic approach to adaptability avoids structural complexity while maintaining versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to heat or steam food depending on the contents, providing a versatile and hygienic solution for food preparation, transportation, and storage, with a focus on energy efficiency and cost-effective design.
Implementation Method 1
a heating element (80) for heating water in the heating cavity (20)
Implementation Method 2
the lunchbox is designed to heat food arranged in the food cavity in the first state of the switching device, and to steam food arranged in the food cavity in the second state
Implementation Method 3
a container (4) for holding food, wherein the base (3) forms a lower part of a heating cavity (20)
Implementation Method 4
to steam food arranged in the food cavity in the second state of the switching device
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a portable lunchbox (1) for storing, transporting, and preparing food, having a food cavity (10) for receiving food; a heating cavity (20) for receiving water; a heating element (80) for heating water in the heating cavity (20); and a switching device (50) which can be switched from a first state to a second state; wherein the lunchbox (1) is designed to heat food arranged in the food cavity (10) in the first state of the switching device (50) and to steam food arranged in the food cavity (10) in the second state of the switching device (50). The lunchbox allows a versatile preparation of food in a simple manner.