Antibacterial Liquid Spray Nozzle Filter Integration

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Solution Overview

Problem

Liquid spray nozzles are prone to clogging due to bacterial growth in the liquid flow channel near the nozzle hole, leading to spray failures.

Innovation Solution

Incorporating a filter with an antibacterial component in the liquid flow channel, which prevents bacterial propagation and clogging by forming an antibacterial part from the filter to the nozzle hole, and optionally using an antibacterial member or light emitter as the antibacterial part.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a liquid spray nozzle is used without additional protective structures, then the device complexity is low, but bacterial growth occurs in the liquid flow channel causing nozzle clogging

Engineering Contradiction:

Improvespray performance consistencyVSAvoidnozzle structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The filter is disposed inside the liquid flow channel of the nozzle, nesting the filtration function within the existing nozzle structure. This allows bacterial prevention without adding external components, resolving the contradiction between reliability improvement and device complexity

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The nozzle structure is designed to simultaneously serve multiple functions: liquid delivery, filtration, and antibacterial protection. By integrating the filter and antibacterial part into the nozzle itself, the design achieves multi-functionality without increasing overall device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a filter is added to the liquid flow channel, then bacterial propagation is prevented, but the device complexity increases

Engineering Contradiction:

Improvebacterial preventionVSAvoidflow channel structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The filter, antibacterial part, and nozzle structure are merged into a single integrated component. The filter is disposed within the liquid flow channel and the antibacterial part is formed as an integral portion of the nozzle, combining multiple protective functions without requiring separate assemblies

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter is nested within the liquid flow channel, and the antibacterial part is nested within or integrated with the filter structure. This nesting approach allows multiple protective layers without proportionally increasing device complexity

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Prevents bacterial growth in the liquid flow channel, thereby preventing nozzle clogging and ensuring consistent liquid spray performance.

Implementation Method 1

at least a part of the filter and the liquid flow channel from the filter to the nozzle hole forms an antibacterial part

Methodology Applied

Scientific EffectAntibacterial action:

Data Source

PatentUS20220331828A1Liquid spray nozzle and liquid spray device

Publication Date: 2022.10.20 SEIKO EPSON CORP

AI summary

A liquid spray nozzle includes a nozzle hole configured to spray a liquid toward an object, a liquid flow channel communicated with the nozzle hole, and a filter disposed in the liquid flow channel, wherein at least one of a part of the filter and a part of the liquid flow channel from the filter to the nozzle hole forms an antibacterial part.