UV-Sterilization Housing Shielding for Outlet Leak Protection
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Solution Overview
Problem
Existing fluid sterilization devices face issues with housing deterioration due to ultraviolet rays leaking out from the outlet port of the flow path pipe, which is not addressed in prior structures that simplify assembly by storing components like the flow path pipe and light source together.
Innovation Solution
A fluid sterilization device design featuring a housing with distinct tubular portions, an opening blocking member, and a shielding member with higher ultraviolet resistance, positioned to shield the housing from leaked ultraviolet rays, using materials like PTFE for the flow path pipe and engineering plastics for the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the outlet port is provided at the other end portion of the flow path pipe to simplify assembly and save disposition space, then the device size is reduced and assembly is simplified, but the housing receives ultraviolet rays leaking out from the outlet port and is likely to deteriorate
Solution Approach 1:
A shielding member is introduced as an intermediary component between the flow path pipe outlet and the housing. This shielding member blocks ultraviolet rays that leak from the outlet port, preventing them from reaching and deteriorating the housing, while allowing the outlet port to remain at the compact position for simplified assembly
Solution Approach 2:
The housing structure is differentiated into regions with different ultraviolet resistance requirements. The shielding member is selectively positioned at the location most exposed to ultraviolet rays (near the outlet port), providing localized protection where it is most needed while maintaining the overall compact design
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 design effectively protects the housing from ultraviolet degradation while maintaining a compact size by shielding it from leaked UV rays, ensuring efficient sterilization and prolonged device lifespan.
Implementation Method 1
a shielding member configured to be provided in the second tubular portion of the housing, to have higher ultraviolet resistance than the housing, to be disposed on an outer peripheral side of the flow path pipe, to define an upstream end portion of an outlet flow path of the sterilization target fluid from the notch, and to shield an inner peripheral side of the housing from emitted light of ultraviolet rays from the notch of the flow path pipe
Implementation Method 2
a light source configured to irradiate an inside of the flow path pipe with ultraviolet rays from the other end side in the axial direction through the ultraviolet transmitting portion of the opening blocking member
Data Source
AI summary
A housing main body and an outer cover constitute a housing. A straight pipe and a light source device are inserted into the housing in an axial direction. An outlet flow path is formed in the housing and communicates with a notch formed on the light source device side of the straight pipe. A shielding ring has higher ultraviolet resistance than the housing. A tapered portion of a shielding ring defines an outlet flow path and protects the housing from ultraviolet rays leaking out to an outside of the straight pipe from the notch.