Airless Sprayer Cleaning with Level-Controlled Water Circulation

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Solution Overview

Problem

The cleaning of airless paint spraying equipment requires a large volume of water, is labor-intensive, and poses health risks due to stagnant water, with existing methods being impractical and inefficient.

Innovation Solution

A device with a level-controlled container and nozzle system that maintains a constant water level, allowing for efficient and thorough cleaning with reduced water consumption and automated refilling, using a level control mechanism to manage water flow and turbulence for effective residue removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large volume of water is used for cleaning, then cleaning effectiveness is improved, but water consumption increases and manual container handling becomes labor-intensive

Engineering Contradiction:
Improvecleaning effectivenessVSAvoidwater consumption
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The cleaning system automatically refills water from the supply line into the cleaning container when the water level drops, eliminating the need for manual container handling and refilling by the operator. The pump continuously circulates water through the spray gun and back to the container, creating a self-sustaining cleaning cycle.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The pump operates continuously to circulate water through the spray gun and back to the container, ensuring constant cleaning action without interruption. The automatic refilling system maintains continuous water availability, preventing downtime in the cleaning process.

Inventive Principle:
Principle #20Continuity of useful action

2Quantity of substance

If multiple large containers are used for cleaning, then sufficient water volume is available, but the containers become obstacles and trip hazards in the workspace

Engineering Contradiction:
Improvewater volumeVSAvoidworkspace safety hazards
Core Design Contradiction:
Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The system divides the water storage into a fixed cleaning container and a separate water supply line, allowing the cleaning container to be small and stationary while the supply line provides additional water volume as needed. This eliminates the need for multiple large containers in the workspace.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The pump acts as an intermediary between the water supply line and the cleaning container, transferring water automatically when the container level drops. This mediator system provides sufficient water volume without requiring large containers to be present in the workspace.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of operation

If water is left stagnant in containers, then cleaning process is simplified, but bacterial growth occurs leading to odors and health problems

Engineering Contradiction:
Improvecleaning process simplicityVSAvoidbacterial growth and odors
Core Design Contradiction:
Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The pump periodically circulates water through the spray gun and back to the container, preventing stagnant water conditions. This periodic movement of water through the system inhibits bacterial growth while maintaining continuous operation of the cleaning process.

Inventive Principle:
Principle #19Periodic action

4Quantity of substance

If the cleaning container is frequently refilled manually, then water supply is maintained, but productivity decreases due to interruptions

Engineering Contradiction:
Improvewater supply continuityVSAvoidcleaning efficiency
Core Design Contradiction:
Quantity of substanceVSProductivity

Solution Approach 1:

The system automatically detects when the water level in the cleaning container drops and refills it from the supply line without operator intervention. This self-service capability eliminates interruptions in the cleaning process and maintains continuous productivity.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system monitors the water level in the cleaning container and uses this feedback to control the refilling process. When the level drops below a threshold, the pump automatically refills the container, ensuring continuous water supply without manual intervention.

Inventive Principle:
Principle #23Feedback

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 efficient and thorough cleaning of airless spraying equipment with reduced water usage, eliminating the need for multiple containers and manual refilling, while preventing bacterial growth and odor formation.

Implementation Method 1

the container has a level control by means of which the level of the fresh water in the container can be maintained at a predetermined value

Methodology Applied
Scientific EffectLevel control:

Implementation Method 2

using a level control mechanism to manage water flow and turbulence for effective residue removal

Methodology Applied
Scientific EffectTurbulence: Turbulence

Data Source

PatentUS12472523B2Cleaning device for airless paint spraying equipment and method therefor
Publication Date: 2025.11.18 KUNZ HEINRICH
  • US12472523B2 patent drawing
  • US12472523B2 patent drawing

AI summary

An apparatus for cleaning airless sprayers having an upwardly open container for receiving fresh water, as well as an inlet connectable to a water supply, and is characterized in that the container has a level control by means of which the level of the fresh water in the container can be maintained at a predetermined value, and in that the inlet opens into at least one nozzle, by means of which fresh water can be discharged in a directed manner into the interior of the container.