Electric heater and electric heating apparatus having same
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Solution Overview
Problem
Existing electric heating apparatuses with plane heating elements face challenges in achieving uniform temperature distribution and maximizing the heating area, particularly due to the interference of electrode parts with the heating patterns, leading to localized heating and reduced effective heating regions.
Innovation Solution
The design incorporates a substrate with an outer pattern part and an inner pattern part, featuring arc-shaped tracks and bridges, where the second electrode parts are located inside the outer pattern part, and the first electrode parts extend outwardly, ensuring a larger heating area without interference and minimizing localized heating by varying the gap distances between bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If electrode parts are positioned outside the heating patterns, then electrode interference with heating is avoided, but the heating area is reduced
Solution Approach 1:
The patent positions electrode parts in the radial direction within the annular heating pattern, utilizing the inner dimension space rather than placing them outside. This dimensional repositioning allows electrodes to be located inside the outer pattern part without reducing the effective heating area, as they occupy space that would otherwise be unused or non-heating region.
Solution Approach 2:
The electrode parts are nested within the annular heating pattern, specifically positioned inside the outer pattern part. This nesting arrangement allows the electrodes to be contained within the heating structure without interfering with the heating function, as they are placed in a configuration where they do not obstruct the heating patterns.
2Area of stationary object
If electrode parts are placed inside the heating patterns, then heating area is maximized, but localized heating and dielectric breakdown occur
Solution Approach 1:
The patent applies different spatial relationships between electrodes and heating patterns in different regions. The first electrode parts are positioned outside the outer pattern part, while the second electrode parts are positioned inside the outer pattern part but spaced from inner pattern parts. This localized differentiation optimizes both heating area and prevents dielectric breakdown in critical regions.
Solution Approach 2:
The patent introduces spacing gaps between electrode parts and heating patterns as an intermediary protective measure. The second electrode parts are spaced apart from the inner pattern parts, creating an insulating gap that prevents direct contact and potential dielectric breakdown while still allowing the electrodes to be positioned within the heating area.
3Temperature
If uniform temperature distribution is achieved, then heating quality is improved, but heating area is reduced due to electrode placement constraints
Solution Approach 1:
The heating element is divided into distinct segments: an outer pattern part and an inner pattern part, with corresponding first and second electrode parts. This segmentation allows each electrode part to be optimally positioned for its function - first electrodes outside for reliability, second electrodes inside for area maximization - while collectively achieving uniform temperature distribution across the entire heating surface.
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
This configuration enhances the heating area of both the outer and inner pattern parts, preventing electrode interference and dielectric breakdown, resulting in more efficient and uniform heating without localized hotspots.
Implementation Method 1
An electric heating apparatus is an apparatus provided for heating, and includes an electric heater using a Joule's heat generated as current flows through a resistance wire or the like
Data Source
AI summary
An electric heater includes a substrate, an outer pattern part disposed on one surface of the substrate, an inner pattern part disposed on the one surface of the substrate so as to be located such that the outer pattern part surrounds the inner pattern part, and to be spaced apart from the outer pattern part. A pair of first electrodes is connected to the outer pattern part and a pair of second electrodes is connected to the inner pattern part and spaced apart from the pair of first electrodes, and the pair of second electrodes are located inside the outer pattern part.