Supplying liquid to at least one wheel of a suction head

Solution Overview

Problem

Wheels of suction heads in vacuum cleaners become polluted during wet cleaning, leading to suboptimal cleaning results as they leave stains or marks on the surface.

Innovation Solution

Incorporating a wetting arrangement that supplies liquid directly to the wheels, ensuring continuous or intermittent cleaning without user intervention, using a conduit system to distribute the liquid effectively and prevent clogging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If wet cleaning is performed using the suction head, then cleaning effectiveness on the surface is improved, but the wheels become polluted and leave stains on the surface

Engineering Contradiction:
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The wetting arrangement supplies liquid to the wheels in advance and continuously during operation, preventing dirt accumulation before it occurs. This preliminary wetting action ensures the wheels remain clean throughout the cleaning process, eliminating the harmful effect of wheel pollution while maintaining effective surface cleaning

Inventive Principle:
Principle #10Preliminary action

2Reliability

If liquid is supplied to the wheels to prevent pollution, then wheel cleanliness is maintained, but the device complexity increases

Engineering Contradiction:
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The wetting arrangement is integrated into the existing suction head structure, merging the wheel wetting function with the overall cleaning system. The conduit system utilizes the existing liquid supply infrastructure of the vacuum cleaner, combining multiple functions (surface wetting, wheel wetting, dirt removal) into a unified system that minimizes additional complexity

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The wheels are automatically wetted by the conduit system during normal operation without requiring user intervention. The system self-regulates the liquid supply to the wheels through the integrated conduits, maintaining wheel cleanliness autonomously throughout the cleaning process

Inventive Principle:
Principle #25Self-service

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

Keeps the wheels clean, preventing pollution and maintaining optimal cleaning results by ensuring the wheels remain wet and reducing dirt accumulation, enhancing the overall cleaning performance.

Implementation Method 1

a conduit system that is in fluid communication with the liquid supply mechanism and that is configured to transport the liquid and to let out the liquid to the at least one wheel

Methodology Applied
Scientific EffectFluid flow through conduit:

Data Source

PatentEP4307976B1Supplying liquid to at least one wheel of a suction head
Publication Date: 2024.08.14
  • EP4307976B1 patent drawingFigure 1
  • EP4307976B1 patent drawingFigure 2
  • EP4307976B1 patent drawingFigure 3

AI summary

:In the context of vacuum cleaning, a suction head (101) is provided, which comprises a housing (30) that includes a coupling area configured to enable coupling of the housing (30) to an air suction source of a vacuum cleaner, at least one brush (20) that is rotatably arranged in the housing (30) and that is configured to interact with a surface (10) to be cleaned, and at least one wheel (90) that is rotatably arranged on the suction head (101) and that is configured to be in contact with the surface (10). The suction head (101) is further equipped with a wetting arrangement (42) that is configured to enable a direct supply of liquid to the at least one wheel (90) and to thereby achieve the effect that the at least one wheel (90) is kept wet and the cleaning results of the surface (10) to be cleaned are optimized.