Portable Liquid Dispenser With Replaceable Bag Pressure Monitoring

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing solutions for generating a flow of pressurized liquid without energy sources are prone to contamination due to the risk of bag rupture and lack of bag replacement options, and they often require cumbersome generators or fuel for operation.

Innovation Solution

A portable dispenser with a deformable bag storing pressurized liquid and gas, connected to a manometer that detects pressure drops to prevent contamination and allows for easy membrane replacement, utilizing a threaded neck configuration for enhanced sealing and using high-density polyethylene materials to prevent corrosion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a deformable bag is used to store pressurized liquid without energy sources, then portability and simplicity are improved, but the risk of bag rupture and liquid contamination increases

Engineering Contradiction:

ImprovesimplicityVSAvoidrisk of bag rupture

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies a pressure-sensitive paint or indicator on the deformable bag that changes color or visual appearance when the bag is over-pressurized or ruptured. This allows immediate detection of bag failure risk without complex sensors, maintaining simplicity while improving reliability through visual feedback.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The patent incorporates a pressure relief valve or burst disc that automatically releases pressure when it exceeds safe limits, providing mechanical feedback control. This prevents bag rupture by automatically responding to pressure changes, resolving the contradiction between simplicity and reliability.

Inventive Principle:

Principle #23Feedback

2Productivity

If the deformable bag breaks, then liquid flow is achieved, but liquid accumulation at the bottom causes microorganism proliferation and contamination

Engineering Contradiction:

Improveliquid flowVSAvoidmicroorganism proliferation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the deformable bag as a replaceable component that can be removed and replaced when contaminated or failed. This allows the liquid storage function to be separated from the container, enabling easy replacement of the bag to prevent contamination while maintaining continuous liquid flow capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent designs the deformable bag as a disposable or recyclable component that is discarded after use or contamination and replaced with a new sterile bag. This eliminates the contamination problem by regularly replacing the bag rather than attempting to clean and reuse it.

Inventive Principle:

Principle #34Discarding and recovering

3Device complexity

If existing dispensers are used without bag replacement capability, then device structure is simplified, but contamination prevention and maintenance are compromised

Engineering Contradiction:

Improvedevice structureVSAvoidbag replacement

Core Design Contradiction:

Device complexityVSEase of repair

Solution Approach 1:

The patent segments the dispenser into modular components: a permanent dispenser body and a replaceable deformable bag. This segmentation allows the bag to be independently replaced without affecting the overall device structure, maintaining structural simplicity while enabling easy maintenance and contamination prevention.

Inventive Principle:

Principle #1Segmentation

4Strength

If metal containers are used for liquid storage, then structural strength is improved, but rust and particle deposition occur

Engineering Contradiction:

Improvestructural strengthVSAvoidrust and particle deposition

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent uses a composite structure combining a rigid outer container (metal or rigid plastic) for structural strength with an inner deformable bag (flexible material) for liquid storage. This composite approach allows the strong outer shell to provide mechanical support while the inner bag contacts the liquid, preventing rust and particle deposition from the metal surface.

Inventive Principle:

Principle #40Composite materials

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

Enables a continuous flow of pressurized liquid up to 3-4 bar without external energy, maintaining cleanliness and allowing for easy maintenance, suitable for various applications including humanitarian aid and water supply.

Implementation Method 1

In order to generate a flow of liquid it is necessary to have a pressure difference between two points

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

a manometer (3) arranged to measure the pressure inside the deformable bag

Methodology Applied

Scientific EffectPressure measurement:

Data Source

PatentEP3517454B1Portable liquid dispenser

Publication Date: 2022.11.02 SPORTSHOWER SL

Figure 1
Figure 2
Figure 3

AI summary

A portable liquid dispenser comprises a container, inside which a deformable bag is arranged, in which the liquid is stored and which is provided with a valve (2) for introducing air between the walls of the container and the deformable bag. Also provided are holes in the upper part of the container for letting liquid into and/or out of the bag, a manometer being arranged in the container to control the pressure of the fluid inside the bag. The device can be used, for example, as a portable shower that supplies water under pressure.