Heating tool
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Solution Overview
Problem
Existing heating elements struggle to efficiently convert heat into steam and control temperature, with issues such as high temperature fluctuations and reduced steam generation due to limitations in water supply and oxygen supply to the heat generating layer.
Innovation Solution
A heating tool with a steam generator that includes a heat generating layer containing an oxidizable metal, a carbon component, a water absorbent polymer, and water, laminated with a water absorbent sheet having specific properties, including a mass ratio and basis weight, to enhance steam generation and temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat generating layer containing oxidizable metal, carbon component, and water is used, then heat generation occurs through oxidation reaction, but temperature fluctuates highly and steam generation is unstable due to insufficient water supply control
Solution Approach 1:
A water absorbent polymer is introduced as an intermediary substance between the heat generating layer and the external environment. This polymer mediates water supply by absorbing excess water and releasing it gradually during the oxidation reaction, thereby stabilizing the water content in the heat generating layer and ensuring stable steam generation without direct external water control.
Solution Approach 2:
The water absorbent polymer dynamically adjusts the water content parameter in the heat generating layer based on the reaction progress. By changing the water availability parameter in response to temperature and reaction rate changes, the system maintains optimal conditions for stable steam generation and temperature control throughout the heating process.
2Quantity of substance
If more water is added to the heat generating layer to improve steam generation, then steam production increases, but temperature control becomes difficult and overheating occurs
Solution Approach 1:
The water absorbent polymer serves as a buffer intermediary that decouples the relationship between external water addition and internal water content. It absorbs excess water when water is added and releases it when needed, preventing both water deficiency and water excess conditions that would respectively cause poor steam generation or uncontrolled temperature rise.
Solution Approach 2:
The water absorbent polymer provides beforehand cushioning by pre-absorbing water in anticipation of the oxidation reaction's water consumption patterns. This prior preparation ensures that water is available when needed for steam generation but is held in a controlled manner to prevent temperature runaway, cushioning against both water shortage and water excess scenarios.
3Productivity
If oxygen supply to the heat generating layer is increased to enhance heat generation rate, then heating efficiency improves, but temperature becomes uncontrollable and safety issues arise
Solution Approach 1:
The water absorbent polymer creates a feedback mechanism where water availability to the oxidation reaction is automatically regulated by the polymer's absorption and release characteristics. As the reaction proceeds and temperature rises, the polymer's water release rate adjusts accordingly, providing negative feedback that prevents runaway temperature increase even when oxygen supply is high, thus maintaining safety while allowing high heating efficiency.
4Speed
If the heat generating layer is made thinner to improve response time, then heating speed increases, but water and oxygen supply becomes insufficient leading to unstable reaction
Solution Approach 1:
The water absorbent polymer is distributed throughout the heat generating layer, creating local water reservoirs at multiple positions within the thin structure. This local distribution ensures that even in a thin layer with high heating speed, water and oxygen are supplied uniformly at each location, maintaining reaction stability and preventing localized reaction failures that would occur in a uniformly thin structure without the polymer.
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 rapid temperature rise, stable steam generation, and controlled temperature, improving the efficiency and effectiveness of the heating process by ensuring appropriate water supply and oxygen availability.
Implementation Method 1
a heat generating layer which contains an oxidizable metal, a carbon component, a water absorbent polymer, and water
Implementation Method 2
generates heat by an oxidation reaction of the oxidizable metal
Implementation Method 3
a water absorbent polymer... which carries water
Implementation Method 4
a water absorbent sheet which carries water are laminated
Data Source
Figure 1~2
Figure 3~4
AI summary
A heating tool (100) according to the present invention includes a steam generator (10) that a heat generating layer (11) which contains an oxidizable metal, a carbon component, a water absorbent polymer, and water, and a water absorbent sheet (102) which carries water are laminated, and a bag (20) at least a portion of which has an air permeability and accommodates the steam generator (10), in which a mass ratio of the water absorbent sheet (102) is equal to or greater than 0.9 and equal to or less than 15 with respect to the water absorbent polymer contained in the heat generating layer (11).