Autonomous Floor Cleaning Robot With Separate Wet and Dry Zones

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Solution Overview

Problem

There is a need for an affordable and effective autonomous floor cleaning robot that can apply cleaning fluids to wet clean floors in the home, as existing manual methods are labor-intensive and decrease in effectiveness due to fluid contamination, while existing industrial robots are too large, costly, and not suitable for home use.

Innovation Solution

An autonomous cleaning robot with a chassis and transport drive system that includes two cleaning zones: one for collecting loose particulates and another for applying and collecting cleaning fluid, featuring a jet port for blowing particulates, a vacuum intake, and a scrubbing element for effective surface cleaning, with integrated containers for fluid and waste management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual wet cleaning methods are used, then cleaning can be performed on floors, but labor intensity increases and cleaning effectiveness decreases due to fluid contamination

Engineering Contradiction:
Improvelabor intensityVSAvoidcleaning effectiveness
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The autonomous cleaning robot performs wet cleaning operations automatically without human intervention. The robot independently navigates, applies cleaning fluid, scrubs surfaces, and collects waste liquid, eliminating the need for manual operation while maintaining consistent cleaning effectiveness throughout the process.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent extracts the cleaning fluid application and collection functions into separate dedicated components. The fluid applicator applies cleaning fluid to the surface, while a separate waste liquid collection system removes contaminated fluid, preventing re-contamination and maintaining cleaning effectiveness without requiring manual intervention.

Inventive Principle:
Principle #2Taking out (Extraction)

2Extent of automation

If industrial autonomous cleaning robots are used, then autonomous wet cleaning capability is achieved, but device size and cost increase making them unsuitable for home use

Engineering Contradiction:
Improveautonomous wet cleaning capabilityVSAvoiddevice size
Core Design Contradiction:
Extent of automationVSVolume of moving object

Solution Approach 1:

The cleaning robot is divided into functional modules: a navigation system for autonomous movement, a compact fluid applicator for cleaning fluid delivery, a scrubbing mechanism for surface cleaning, and a waste liquid collection system. This segmentation allows each component to be optimized for compactness while maintaining autonomous wet cleaning capability suitable for home environments.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent employs compact, space-efficient designs for the fluid storage and waste collection containers, utilizing flexible or thin-walled structures that maximize internal volume while minimizing external footprint, enabling autonomous functionality in a home-sized device.

Inventive Principle:
Principle #30Flexible shells and thin films

3Duration of action of moving object

If cleaning fluid is applied and reused, then cleaning can continue, but fluid contamination increases reducing effectiveness

Engineering Contradiction:
Improvecleaning durationVSAvoidcleaning effectiveness
Core Design Contradiction:
Duration of action of moving objectVSReliability

Solution Approach 1:

The patent separates the cleaning fluid application system from the waste liquid collection system. As the robot moves forward, the fluid applicator deposits fresh cleaning fluid on the surface while the waste liquid collection system simultaneously removes contaminated fluid, ensuring continuous availability of clean cleaning fluid throughout the cleaning process and maintaining effectiveness over extended duration.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The robot applies cleaning fluid to the surface in advance before scrubbing operations begin, allowing the fluid to penetrate and loosen contaminants. The waste liquid collection then removes the now-contaminated fluid, preparing the surface for effective cleaning while maintaining fluid effectiveness for subsequent areas.

Inventive Principle:
Principle #10Preliminary action

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 robot efficiently collects loose particulates and applies cleaning fluid autonomously, maintaining cleaning effectiveness without fluid contamination, and is designed for home use with a compact and affordable design.

Implementation Method 1

a jet port configured to blow a jet of air across a cleaning width of the robot

Methodology Applied
Scientific EffectJet: Jet

Implementation Method 2

a vacuum configured to generate a negative air pressure within the robot for suctioning loose particulates and waste liquid from the cleaning surface

Methodology Applied
Scientific EffectSuction: Suction

Data Source

PatentUS8670866B2Autonomous surface cleaning robot for wet and dry cleaning
Publication Date: 2014.03.11 IROBOT CORP
  • US8670866B2 patent drawing
  • US8670866B2 patent drawing
  • US8670866B2 patent drawing

AI summary

An autonomous floor cleaning robot includes a transport drive and control system arranged for autonomous movement of the robot over a floor for performing cleaning operations. The robot chassis carries a first cleaning zone comprising cleaning elements arranged to suction loose particulates up from the cleaning surface and a second cleaning zone comprising cleaning elements arraigned to apply a cleaning fluid onto the surface and to thereafter collect the cleaning fluid up from the surface after it has been used to clean the surface. The robot chassis carries a supply of cleaning fluid and a waste container for storing waste materials collected up from the cleaning surface.