Automatic cleaning machine

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Solution Overview

Problem

Conventional cleaning robots are ineffective in removing stain marks, footprints, and fine particles due to limited wiping frequency and inability to handle uneven floors, and they often accumulate dust in front of the cleaning cloth, reducing their cleaning efficiency.

Innovation Solution

An automatic cleaning machine equipped with a reciprocating wiping mechanism, a vacuum device, and a spray device, along with a control system and sensors for obstacle detection and path planning, which increases wiping frequency, effectively sucks up dust, and intelligently sprays water to maintain optimal cleaning cloth moisture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a cleaning robot uses a simple pulled cleaning cloth mechanism, then the device complexity is low, but the cleaning effectiveness is limited and cannot remove stain marks, footprints and fine particles effectively

Engineering Contradiction:
Improvedevice complexityVSAvoidcleaning effectiveness
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The cleaning system is divided into separate functional modules: a suction unit with vacuum cleaner for removing dust and particles, and a separate mopping unit with cleaning cloth for wet cleaning. This segmentation allows each module to perform its specialized function effectively, resolving the contradiction between simple structure and cleaning effectiveness.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent combines multiple cleaning functions (suction and mopping) into a single integrated robot system. The suction unit and mopping unit work together synergistically, with the suction unit preparing the surface by removing loose particles and the mopping unit completing the cleaning, thereby achieving comprehensive cleaning effectiveness without requiring overly complex individual components.

Inventive Principle:
Principle #5Merging (Combining)

2Device complexity

If a cleaning robot moves back and forth at low speed, then the device structure is simple, but the wipe frequency is low and dust accumulates in front of the cleaning cloth

Engineering Contradiction:
Improvedevice structureVSAvoidwipe frequency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The suction unit performs preliminary action by sucking up dust and particles from the floor surface before the mopping unit passes over the same area. This preliminary cleaning prevents dust accumulation in front of the cleaning cloth and allows the robot to maintain higher speeds without compromising cleaning quality, thus improving productivity without excessive structural complexity.

Inventive Principle:
Principle #10Preliminary action

3Device complexity

If a cleaning robot uses a rubber scraper to recycle water, then the device complexity is moderate, but water is left on the floor when the floor is uneven or has slots

Engineering Contradiction:
Improvedevice complexityVSAvoidcleaning quality
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent replaces the mechanical rubber scraper with a suction-based water recovery system. The vacuum cleaner generates negative pressure to suction excess water from the floor surface and the cleaning cloth, preventing water from being left on uneven floors or in slots. This pneumatic approach maintains moderate device complexity while significantly improving cleaning quality and water management.

Inventive Principle:
Principle #29Pneumatics and hydraulics

4Device complexity

If a cleaning robot does not include a vacuum device, then the device complexity is low, but dust accumulates in front of the cleaning cloth and cannot be collected

Engineering Contradiction:
Improvedevice complexityVSAvoidcleaning efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The vacuum cleaner performs preliminary action by suctioning dust and particles from the floor surface before the mopping unit processes the area. This prevents dust accumulation in front of the cleaning cloth and ensures that the mopping unit works on a pre-prepared surface, significantly improving cleaning efficiency without requiring the robot to move slowly or repeat passes.

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 automatic cleaning machine achieves high-efficiency cleaning by increasing wiping frequency, effectively removing dust and dirt, and improving cleaning effectiveness on uneven surfaces through intelligent water spraying, enabling comprehensive floor cleaning.

Implementation Method 1

a vacuum device used for sucking the dust in front of the cleaning cloth on the floor

Methodology Applied
Scientific EffectSuction: Suction

Implementation Method 2

a spray device used for spraying water on the floor

Methodology Applied
Scientific EffectSpray: Spray

Data Source

PatentUS10524630B2Automatic cleaning machine
Publication Date: 2020.01.07 HOBOT TECH INC
  • US10524630B2 patent drawing
  • US10524630B2 patent drawing
  • US10524630B2 patent drawing

AI summary

An automatic cleaning machines comprises a high-speed reciprocating cleaning means making a cleaning cloth reciprocatingly wipe a floor at high speed and a vacuum device sucking the dust in front of the cleaning cloth.