Refrigerator Dispenser Light Guide for Splash-Safe LED Illumination
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Solution Overview
Problem
Conventional refrigerator dispensers face challenges with low illumination effect at night, risk of water splashing on lighting components, and increased production costs due to complex assembly processes for LED installation.
Innovation Solution
A refrigerator design featuring an optical source positioned between the press switch and ice discharge opening, with a guide member that includes a cover portion to house the LED and a light dispersion portion, allowing for improved light distribution and reduced component complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LEDs are installed at the upper wall surface of the dispenser housing to emit light downward, then the illumination effect is improved, but ice cubes or water may splash to damage the lighting device
Solution Approach 1:
The optical source is nested within the guide member structure itself. The guide member includes an optical source accommodation portion that houses the LED, positioning it inside the dispenser housing rather than on the external upper wall surface. This nesting resolves the contradiction by protecting the optical source from water splashing while maintaining its illumination function.
Solution Approach 2:
The guide member acts as an intermediary structure that both guides ice cubes and houses the optical source. By integrating the optical source accommodation portion into the guide member, the design provides a protective barrier between the optical source and the ice discharge path, preventing water damage while enabling illumination.
2Illumination intensity
If LEDs are installed at the upper wall surface of the dispenser housing, then the illumination effect is improved, but the visual effect during illumination is reduced due to direct light irradiation onto the housing
Solution Approach 1:
The guide member incorporates a light dispersion portion with a specific surface structure that differs from other parts. This local quality change in the form factor causes light to disperse in multiple directions rather than irradiating directly onto the housing, improving the visual effect while maintaining illumination functionality.
3Illumination intensity
If additional components for fixing the LEDs are required, then the illumination function is achieved, but the number of entire components and assembly processes is increased, causing high production costs
Solution Approach 1:
The optical source accommodation portion is merged with the guide member as an integrated structure. The guide member simultaneously performs ice guiding function and houses the optical source, eliminating the need for separate mounting brackets or fixing components. This merging reduces the total component count and simplifies assembly processes.
Solution Approach 2:
The guide member is designed with multi-functionality: it guides ice cubes from the duct to the discharge opening and simultaneously serves as the mounting structure for the optical source. This universal design consolidates multiple functions into a single component, reducing overall device complexity and production costs.
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
Enhances illumination for easy ice or water recognition at night, prevents water leakage, and reduces production costs by simplifying LED installation and assembly.
Implementation Method 1
a plurality of LEDs configured to downwardly illuminate inside of the dispenser housing are installed
Implementation Method 2
a light dispersion portion configured to disperse light emitted from the optical source in a downward direction is formed at the guide member
Data Source
AI summary
Disclosed are a refrigerator and a lighting device therefor. Since an optical source, an LED is installed at a height to overlap a guide member, light emitted from the LED is widely dispersed through the guide member. This may allow a user to easily check a discharged degree of ice cubes or water, and to have sophisticated aesthetic feeling. Furthermore, since the optical source is fixed to an optical source accommodation portion by being encompassed thereby, a water leakage prevention function may be enhanced, and an additional coupling member for coupling the optical source may not be required. This may allow the number of components and assembly processes to be decreased, and the production costs to be reduced.