Oven Lamp Module Cooling and Light Diffusion for Shadow-Free LEDs
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Solution Overview
Problem
Cooking appliances using LED lamps face challenges in operating at high temperatures and forming shadows due to the linear nature of LED light, which affects the heating efficiency and emotional quality of the product.
Innovation Solution
A lamp module with multiple layers of glasses, including an etching glass, is integrated into the cooking appliance to insulate the LED lamp from hot air and disperse light, while being cooled by a cooling fan to maintain a suitable temperature and prevent shadow formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If an LED lamp is used in a cooking appliance, then power consumption is reduced and service life is extended, but the LED cannot operate at the high temperatures inside the cooking compartment
Solution Approach 1:
The lamp module is separated into distinct functional components: an LED lamp unit and a cooling fan unit. The cooling fan is positioned to draw ambient air through the lamp module housing, creating a dedicated cooling pathway that isolates the LED temperature from the high-temperature cooking environment while maintaining illumination function.
Solution Approach 2:
A cooling fan acts as an intermediary between the LED lamp and the high-temperature cooking compartment. The fan actively transports cooler ambient air through the lamp module housing, serving as a thermal buffer that protects the LED from direct exposure to cooking compartment heat while allowing the lamp to fulfill its illumination purpose.
2Reliability
If multiple small holes are provided in the cooking compartment for light to pass through, then high frequency waves are prevented from exiting, but shadows are formed due to the linear nature of LED light
Solution Approach 1:
The lamp module housing extends in the vertical dimension above the cooking compartment, allowing light to be emitted from multiple heights and angles. This three-dimensional light emission pattern eliminates shadow formation by ensuring that light reaches all areas of the cooking compartment without relying on a planar array of holes, while the housing still prevents high frequency wave escape.
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 effectively allows the LED lamp to operate in high-temperature conditions without forming shadows inside the cooking compartment, enhancing user convenience and the emotional quality of the appliance.
Implementation Method 1
a cooling fan disposed at an upper portion of the cooking compartment to suction outside air
Implementation Method 2
a plurality of glasses configured to insulate the LED lamp from hot air inside the cooking compartment in multiple layers
Implementation Method 3
the first glass may include an etching glass configured to disperse light radiated from the LED lamp
Data Source
AI summary
Disclosed herein are a lamp module that includes a double insulation structure and a cooling structure, thus being usable even in a high temperature condition, and a cooking appliance including the same. The cooking appliance includes a cooking compartment, a cooling fan disposed at an upper portion of the cooking compartment to suction outside air, and a lamp module configured to illuminate an inside of the cooking compartment and disposed adjacent to the cooling fan to exchange heat with the outside air suctioned by the cooling fan.