Pressurized Nebulizer Using Peristaltic Hose Compression

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Solution Overview

Problem

Existing pressurized nebulizers face issues of contact contamination, unstable output, and poor control accuracy due to the need for direct liquid contact and pressure pumping, which limits their effectiveness in medical applications.

Innovation Solution

A pressurized nebulizer design incorporating a peristaltic pump with an elastic braided hose capable of withstanding pressures greater than or equal to 2MPa, featuring a minimum clearance of 1.5T≤P≤1.9T between the roller and mating part, ensuring stable and continuous aerosol particle output without liquid contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an injector is used to pressurize and convey liquid, then liquid can be delivered to the nozzle, but contact contamination occurs and output stability deteriorates

Engineering Contradiction:

Improveoutput stabilityVSAvoidcontact contamination

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an elastic braided hose as an intermediary component between the liquid source and the nozzle. This hose can withstand high pressures (≥2MPa) while maintaining flexibility, allowing liquid transmission without direct contact with the injector mechanism, thus preventing contamination and ensuring stable output.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the traditional mechanical injector system with a peristaltic pump mechanism that uses a roller to compress the elastic braided hose. This substitution eliminates the need for direct liquid contact with mechanical components, solving both contamination and stability issues simultaneously.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If an injector works by pumping pressure, then liquid can be conveyed, but control accuracy deteriorates

Engineering Contradiction:

Improveliquid conveyance capabilityVSAvoidcontrol accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent changes the operating parameters by using high-pressure elastic braided hose (≥2MPa) combined with peristaltic pumping. This parameter change enables precise control of liquid flow and aerosol generation, improving control accuracy while maintaining high productivity.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If conventional injector is used, then device structure is simple, but manufacturing precision and control accuracy are poor

Engineering Contradiction:

Improvestructure simplicityVSAvoidcontrol accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent employs an elastic braided hose as a flexible component that can withstand high pressures while maintaining a relatively simple overall device structure. This flexible hose enables precise control of liquid flow and aerosol generation without requiring complex mechanical components, thus improving manufacturing precision while keeping the device simple.

Inventive Principle:

Principle #30Flexible shells and thin films

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 achieves accurate, reliable, and safe aerosol delivery at high pressures, overcoming the limitations of conventional nebulizers by preventing liquid contact and ensuring stable output and precise control.

Implementation Method 1

a peristaltic pump, and an elastic braided hose with a maximum pressure endurance value greater than or equal to 2MPa... the roller during a rotation with the rotating base has a working stroke of contacting and squeezing the elastic braided hose

Methodology Applied

Scientific EffectPeristalsis: Peristalsis

Implementation Method 2

an elastic braided hose with a maximum pressure endurance value greater than or equal to 2MPa... the movement of the roller in the working stroke is configured to cause liquid coming from the input end of the elastic braided hose to be conveyed to the output end of the elastic braided hose at a pressure greater than or equal to 2MPa

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

so that the pressurized liquid is formed into aerosol particles through the nozzle to spray in the body cavity

Methodology Applied

Scientific EffectAtomization:

Data Source

PatentEP4414010B1Pressurized nebulizer

Publication Date: 2025.10.22 GUANGZHOU JUNLIN MEDICAL TECH CO LTD

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AI summary

A pressurized nebulizer includes a nozzle (10), a peristaltic pump (20), and an elastic braided hose (30). The peristaltic pump includes a fixing part (211), a mating part (212), a rotating base (213) and a roller (214). When the mating part and the fixing part are in a closed state, the elastic braided hose is arranged between the mating part and the fixing part, and between the mating part and the roller. An output end (32) of the elastic braided hose is connected with the nozzle. The roller in the working stroke has a limit position of extruding the elastic braided hose to a limit state, a minimum clearance formed between the roller and the mating part is 1.5T≤P≤1.9T, where T denotes a unilateral wall thickness of the elastic braided hose, and P denotes the minimum clearance. The nebulizer can avoid liquid contact contamination, provide a stable output and have accurate accuracy.