Self-Heating Container With Chemical Heater and Temperature Cutoff
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Solution Overview
Problem
Existing containers lack an effective and efficient method to generate heat for warming beverages or food using chemical reactions, particularly in a self-heating mechanism that is user-activated and thermally efficient.
Innovation Solution
A self-heating container design featuring a chemical heat source with a frangible shell containing a heating chemical, activated by a user-operated cutting mechanism that triggers an exothermic reaction, and a deactivation mechanism to control temperature, utilizing a thermally conductive inner container and a space between the inner and outer containers for heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a chemical heat source is positioned within the container wall space to heat food contents, then the heating efficiency and temperature control are improved, but the device complexity increases due to the need for activation elements and deactivators
Solution Approach 1:
The chemical heat source is nested within the container wall structure, specifically positioned in the space between the inner and outer containers. The activation element and deactivator are integrated into this nested arrangement, allowing the heating mechanism to be contained within the existing container geometry without requiring separate external heating devices.
Solution Approach 2:
The container is divided into distinct functional zones: the inner container holds food, the wall space contains the chemical heat source, and the outer container provides structural support. This segmentation allows each component to perform its specific function efficiently while maintaining overall system compactness.
2Ease of operation
If an activation element is added to trigger heat generation by the chemical heat source, then the ease of operation is improved through user-activated heating, but the device complexity increases
Solution Approach 1:
The activation element is designed to be manipulated directly by the user without requiring external equipment or complex control systems. The user simply operates the activation element to initiate the chemical reaction, and the system self-regulates the heating process through the chemical reaction itself and the deactivator mechanism.
Solution Approach 2:
The activation element serves as an intermediary between the user and the chemical heat source. It translates user action into the initiation of the chemical reaction, providing a simple interface that bridges human operation and chemical process without requiring complex control electronics or mechanisms.
3Reliability
If a deactivator is included to decrease heat generation when threshold temperature is reached, then the safety and temperature control are improved, but the device complexity increases
Solution Approach 1:
The deactivator is positioned to be affected by the temperature of the food contents. As the food reaches the desired temperature, the deactivator responds by decreasing heat generation from the chemical heat source. This creates a natural feedback loop that automatically regulates temperature without requiring external temperature sensors or control systems.
Solution Approach 2:
The deactivator mechanism operates autonomously based on the thermal state of the food contents. It self-regulates the heating process by responding to temperature conditions, eliminating the need for external control systems, thermostats, or electronic monitoring devices.
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
The solution enables efficient and controlled heat generation for warming food or beverages, ensuring the contents reach the desired temperature while safely managing excess heat through a deactivation mechanism, providing a convenient and effective self-heating solution.
Implementation Method 1
A chemical heater is located within the space and includes a frangible shell and a heating chemical located within the frangible shell. An activator including a cutting surface is configured to pierce the frangible shell triggering heat generation by the chemical heater.
Implementation Method 2
A deactivator is located within the space and is configured to decrease the amount of heat generated by the chemical heater when a threshold temperature is reached.
Implementation Method 3
The inner container is formed of a thermally conductive material such that heat from a heat source on the outside of the inner container may be conducted into the food cavity of the inner container to raise the temperature of the contents of the cavity.
Data Source
AI summary
A self-heating food container configured to hold food and to heat food within the container is provided. The container includes a body wall. A space is defined within the body wall. A chemical heater is located within the space, which upon activation, is configured to generate heat, thereby increasing the temperature of the contents cavity.