Pet Litter Box UV-C Lamp Positioning for Microbial Control
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Solution Overview
Problem
Existing pet litter boxes are complex, costly, and inefficient in reducing harmful microorganisms due to light attenuation through plastic walls and distance from the light source.
Innovation Solution
A pet litter box with a UV-C lamp positioned directly adjacent to the absorbent material, eliminating the need for transparent containers and using a motion detector to ensure pet safety and optimal light exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ultraviolet lamps are positioned outside the container (as in prior art), then the device structure is simpler, but the ultraviolet light intensity is attenuated due to transmission through plastic walls and distance
Solution Approach 1:
The ultraviolet lamp is extracted from the exterior position and moved inside the container, positioning it directly adjacent to the absorbent material. This eliminates the need for light transmission through plastic walls and reduces distance, thereby intensifying the ultraviolet irradiation effect on the litter.
Solution Approach 2:
The transparent or translucent container wall acts as an intermediary that transmits ultraviolet light from the exterior lamp to the interior litter. This allows the lamp to remain outside the container while still achieving effective irradiation, balancing structural simplicity with light intensity requirements.
2Reliability
If transparent containers are used to allow UV transmission, then germicidal effectiveness is improved, but manufacturing cost increases and aesthetics deteriorate
Solution Approach 1:
Instead of making the container transparent to allow UV transmission from outside, the invention inverts the approach by placing the UV lamp inside the container. This allows the use of opaque, aesthetically pleasing containers while maintaining effective germicidal irradiation directly on the litter.
3Reliability
If the lamp is positioned far from the litter (as in prior art), then the device structure is simpler, but the germicidal effectiveness decreases due to light attenuation
Solution Approach 1:
The lamp is extracted from distant exterior positioning and relocated to immediate proximity with the absorbent material inside the container. This close positioning maximizes UV light intensity on the litter while the simple container structure itself provides the mounting support, avoiding complex positioning mechanisms.
4Reliability
If continuous UV irradiation is used, then germicidal effectiveness is maximized, but pet safety is compromised due to potential harm to pets using the litter box
Solution Approach 1:
The UV lamp operates periodically rather than continuously - activating after pet usage to provide germicidal treatment during periods when no pets are present. This periodic operation maintains effective pathogen reduction while eliminating exposure risks to pets, as the lamp only operates when the container is unoccupied.
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 design provides effective, cost-efficient germicidal irradiation directly to the litter, reducing microorganisms while ensuring pet safety and minimizing costs.
Implementation Method 1
Ball, U.S. Pat. No. 4,998,504 discloses a disposable pet litter box having a transparent container disposed within a sanitizing support container. The support container has ultraviolet light producing lamps around its interior. The UV light is transmitted though the transparent container and penetrates into the cat litter, to kill microorganisms.
Implementation Method 2
The UV light is transmitted though the transparent container and penetrates into the cat litter
Data Source
AI summary
A litter box for pets is provided having a container defined by a bottom and side walls and a germicidal ultraviolet light lamp positioned parallel to the bottom of the container and around the interior peripheral edge of the container, whereby the light from the lamp has an unobstructed path to the absorbent granular material in the container. A motion detector may be provided to turn the lamp off and on when a pet approaches the litter box.