Appliance Door Lighting Layout for Pyrolysis Heat Protection
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Solution Overview
Problem
Existing household appliance doors with lighting systems are complex and inadequately protect light sources from high temperatures, leading to reduced service life during pyrolysis operations.
Innovation Solution
The light sources are positioned in a cold area separated from the warm area by a partition with light transmission openings, using semiconductor light sources and a light guide for efficient illumination, and optionally connected to a heat sink for enhanced cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source is arranged directly in the door covering the loading opening, then the illumination of the receiving space is improved, but the light source is exposed to high temperatures during pyrolysis operation
Solution Approach 1:
The door is divided into a warm area covering the loading opening and a cold area separated by a partition. The light source is placed in the cold area, which is thermally separated from the warm area, allowing the light source to remain cool while still providing illumination to the receiving space through the transparent door sections.
Solution Approach 2:
The partition acts as an intermediary thermal barrier between the warm area (exposed to high temperatures) and the cold area (housing the light source). This intermediary structure allows thermal separation while maintaining the structural integrity of the door and enabling light transmission from the cold area to the receiving space.
2Reliability
If the light source is protected from high temperatures by separating it from the loading opening, then the service life of the lighting device is extended, but the device structure becomes more complex
Solution Approach 1:
The door is segmented into distinct thermal zones (warm area and cold area) separated by a partition. This segmentation allows the light source to be placed in the thermally favorable cold area while maintaining a relatively simple overall door structure that can be manufactured using standard techniques.
Solution Approach 2:
The partition serves multiple functions: it provides thermal separation to protect the light source, maintains structural integrity of the door, and allows for light transmission from the cold area to the receiving space. This multi-functionality reduces the need for additional protective components, keeping the device complexity low.
3Object-affected harmful factors
If a partition is introduced to separate cold and warm areas, then the light source is protected from thermal radiation, but the door design becomes more complex
Solution Approach 1:
The partition serves as an intermediary thermal barrier that effectively blocks thermal radiation from the warm area to the cold area while maintaining a relatively simple door design. The partition is integrated into the door structure and works together with the transparent sections to achieve both thermal protection and light transmission.
Solution Approach 2:
The partition performs multiple functions simultaneously: thermal separation, structural support, and light transmission facilitation. By combining these functions into a single component, the overall door design remains relatively simple despite the added thermal protection 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
This configuration extends the life of the lighting system by maintaining low thermal levels, improving user safety, and achieving uniform and efficient illumination while withstanding high temperatures.
Implementation Method 1
the partition has at least one light transmission opening for the transmission of light by means of the at least one light guide through a light transmission opening
Implementation Method 2
at least one light guide which is arranged and configured to radiate light coupled into it into the receiving space
Implementation Method 3
at least one semiconductor light source for generating light
Implementation Method 4
optionally connected to a heat sink for enhanced cooling
Data Source
AI summary
The household appliance door (1) has cold process area (K), which is provided to a closed state of the household appliance door, and is arranged lateral to a feed opening, where an illumination device is provided with a light source for illuminating a receiving space. the light source is arranged inside the cold process area. The illumination device has a light guide, in which the light from the light source is coupled, where the light guide is arranged and adapted to pass the coupled light and to irradiate the light into the receiving space.