Self-Regulating Ice Mold Heating for Low-Energy Cube Release
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Solution Overview
Problem
Conventional ice makers in domestic refrigerators lack an efficient mechanism to release ice cubes once formed, as they do not effectively manage the electrical conductivity of the polymeric body to control temperature and facilitate ice ejection.
Innovation Solution
An ice maker with an electrically-conductive polymeric body and copper electrodes, where the polymeric body's electrical conductivity decreases at higher temperatures, allowing for controlled heating to release ice cubes, and a mechanism to extract the ice cubes using an ejector arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the polymeric body is heated to release ice cubes, then ice ejection is facilitated, but energy consumption increases
Solution Approach 1:
The polymeric body automatically regulates its own electrical conductivity based on temperature changes. When heated, the conductivity decreases, which automatically reduces current flow and heating intensity. This self-regulating mechanism eliminates the need for external control systems, achieving ice ejection while minimizing energy consumption through passive thermal response.
Solution Approach 2:
The invention utilizes the temperature-dependent electrical conductivity parameter of the polymeric body. As temperature increases during heating, the electrical conductivity decreases, creating a natural feedback mechanism that modulates power consumption. This parameter change allows the system to adapt heating levels automatically, balancing ice release effectiveness with energy efficiency.
2Power
If the electrical conductivity of the polymeric body is high, then heating efficiency is improved, but temperature control precision deteriorates
Solution Approach 1:
The system employs inherent feedback through the temperature-conductivity relationship of the polymeric body. As the body heats up, its conductivity automatically decreases, reducing current flow and preventing overheating. This negative feedback loop provides self-regulating temperature control without requiring external sensors or control circuits, achieving both heating efficiency and temperature precision.
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 efficient release of ice cubes by managing the polymeric body's conductivity to maintain a temperature range that facilitates ice ejection, improving the ice production cycle and reducing energy consumption.
Implementation Method 1
The pair of electrodes and the polymeric body define an electrical circuit such that electrical current flows through the polymeric body when the power supply is electrically-coupled to the electrodes to heat the polymeric body
Implementation Method 2
The polymeric body has a first electrical conductivity at a first operating temperature, and the polymeric body has a second electrical conductivity that is less than the first electrical conductivity at a second operating temperature. The second operating temperature is greater than the first operating temperature.
Data Source
AI summary
An ice maker of a domestic refrigerator that includes an ice mold having an electrically-conductive polymeric body and a plurality of cavities defined in the polymeric body. Each cavity is sized to receive a quantity of fluid corresponding to a single ice cube. A pair of electrodes is engaged with a bottom surface of the polymeric body. The polymeric body has a first electrical conductivity at a first operating temperature and a second electrical conductivity that is less than the first electrical conductivity at a second operating temperature. The second operating temperature is greater than the first operating temperature.