Electric Heating Assembly With Vent Channel for Moisture Mitigation
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Solution Overview
Problem
Significant moisture buildup in electric heating elements can cause current leakage and disrupt electrical operation, posing safety risks and operational challenges, especially in appliances that are unused for extended periods.
Innovation Solution
An electric heating assembly with a sheath, resistive wire, thermally conductive electrical insulation, and a tubular body that includes a vent channel to expel moisture, preventing moisture accumulation and maintaining electrical safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If moisture is allowed to accumulate in the heating element, then the appliance can remain unused for extended periods without immediate issues, but significant moisture buildup causes current leakage and disrupts electrical operation
Solution Approach 1:
The heating element is designed with a vent channel that proactively removes moisture before it can accumulate to harmful levels. The vent channel extends from the internal volume where moisture condenses to the external environment, allowing continuous or periodic expulsion of moisture during operation or after use, preventing the harmful accumulation effect.
Solution Approach 2:
The vent channel extracts moisture from the internal volume of the heating element and transports it to the external environment. This extraction mechanism removes the harmful substance (moisture) from the system, preventing current leakage and electrical disruption while maintaining the compact structure of the heating element.
2Reliability
If a vent channel is added to remove moisture, then moisture accumulation is prevented, but the structure of the heating element becomes more complex
Solution Approach 1:
The vent channel is merged with the existing structural components of the heating element. It is formed as an integral part of the housing or sheath structure, combining the moisture venting function with the structural enclosure function. This integration avoids adding separate complex moisture removal systems while still achieving effective moisture mitigation.
Solution Approach 2:
The vent channel is segmented into discrete sections within the heating element structure, allowing it to be formed as separate components that can be assembled together. This segmentation enables the vent channel to be integrated without requiring complete redesign of the entire heating element structure, minimizing added complexity.
3Volume of moving object
If the heating element is made compact, then it fits well within appliance spaces, but moisture can trap more easily within the enclosed volume
Solution Approach 1:
The vent channel provides a preliminary moisture removal path that is always available within the compact structure. By incorporating the vent channel during design, moisture is continuously or periodically expelled before it can accumulate to harmful levels, allowing the heating element to remain compact without creating moisture trapping conditions.
Solution Approach 2:
The vent channel acts as an intermediary pathway between the enclosed internal volume and the external environment. It provides a controlled interface that allows moisture to escape from the compact enclosed space without requiring the space itself to be large, maintaining both compactness and moisture mitigation capability.
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 assembly effectively vents moisture without increasing the size or shape of the heating element, preventing current leakage and ensuring safe and reliable operation.
Implementation Method 1
The resistive wire may be disposed within the enclosed volume to generate heat in response to an electrical current
Implementation Method 2
The thermally conductive electrical insulation may be radially positioned between the resistive wire and the sheath
Implementation Method 3
The tubular body may be disposed radially inward from the sheath and define a vent channel extending from a vent inlet disposed within the sheath to a vent outlet held outside of the sheath
Data Source
AI summary
An electric heating assembly may include a sheath, a resistive wire, a thermally conductive electrical insulation, and a tubular body. The sheath may define an enclosed volume along a longitudinal length between a first end portion and a second end portion. The resistive wire may be disposed within the enclosed volume to generate heat in response to an electrical current. The thermally conductive electrical insulation may be radially positioned between the resistive wire and the sheath. The tubular body may be disposed radially inward from the sheath and define a vent channel extending from a vent inlet disposed within the sheath to a vent outlet held outside of the sheath.