UV-C Refrigerator Chamber Locking to Prevent User Exposure
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Solution Overview
Problem
Existing refrigerators using UV light to inhibit food spoilage pose health risks due to potential skin or eye irritation, scalds, and vision damage from UV radiation, as they lack robust safety measures to prevent exposure.
Innovation Solution
A refrigerator with a UV treatment compartment featuring an automatically lockable door and cover, controlled by an electronic unit, ensuring the UV light is only activated when the compartment is closed and locked, with separate control panels for activation and deactivation, and a sensor for verifying operational status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV light source is installed in the chamber for preventing microorganism growth, then food preservation is improved, but health risks from UV radiation exposure increase
Solution Approach 1:
The refrigerator is divided into separate functional zones: a UV treatment chamber (5) isolated from the main refrigerator volume by a cover (7). This segmentation confines UV radiation to a specific enclosed space, allowing food preservation benefits while preventing harmful exposure to users in the main compartment.
Solution Approach 2:
A cover (7) acts as an intermediary barrier between the UV light source (6) and the main refrigerator space. This physical intermediary blocks UV radiation from reaching users while allowing the UV treatment to function effectively within the chamber, resolving the contradiction between food preservation and safety.
2Reliability
If the UV light source is activated to treat food, then hygiene is improved, but user safety is compromised due to potential exposure
Solution Approach 1:
The cover (7) is locked in place before the UV light source (6) is activated. This preliminary action of securing the protective barrier ensures that safety measures are established before the harmful UV radiation is generated, preventing user exposure while maintaining hygiene benefits.
Solution Approach 2:
The electronic control unit (9) receives feedback from sensors (12) that detect whether the cover (7) and door (3) are properly closed and locked. This feedback mechanism ensures the system only activates the UV light source when safety conditions are met, automatically preventing exposure risks while maintaining hygiene treatment.
3Object-affected harmful factors
If automatic locking mechanism is implemented for safety, then user protection is improved, but device complexity increases
Solution Approach 1:
The locking control functions for both the cover (7) and door (3) are merged into a single electronic control unit (9). This integration consolidates multiple control functions into one centralized system, providing comprehensive safety through coordinated locking while avoiding the complexity of separate independent control systems.
Solution Approach 2:
The electronic control unit (9) performs multiple functions: it controls the locking mechanisms, monitors sensor feedback, manages UV light activation, and operates control panels (10, 11). This multi-functionality reduces overall system complexity by using a single intelligent controller rather than multiple dedicated control devices.
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 significantly reduces user exposure to harmful UV rays by ensuring the UV light is only active within the designated compartment and not in the main refrigerator area, enhancing safety while maintaining effective food preservation.
Implementation Method 1
Primary suppressing mechanism of UV light relies on UV-C light absorption by the DNA molecule of the organisms at 254 nm wavelength
Data Source
Figure 1
AI summary
The present invention pertains to a refrigerator (1) having a chamber where food items are preserved. The present invention more specifically pertains to a refrigerator (1) having a UV-C treatment compartment whose opening is effected by means of a lock. Said refrigerator (1) comprises an electronic control unit (9) for controlling said lock of said cover (7). A further lock is provided on said door (3).