Self-cleaning floor cleaning machine
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Solution Overview
Problem
Self-propelled floor cleaning machines struggle to effectively remove dirt particles that stick stubbornly to the floor, as they are not picked up by sweeping brushes and fed to the suction nozzle.
Innovation Solution
The addition of second suction nozzles directed towards the sides of scrubbing brushes, combined with moisture nozzles to loosen dirt and rotatable scrubbing brushes to rub off dirt, ensures that dirt is loosened and vacuumed off without contaminating the cleaning liquid, preventing impaired cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sweeping brushes are used to remove dirt particles, then loose dirt particles can be picked up, but dirt adhering stubbornly to the floor cannot be removed
Solution Approach 1:
The cleaning process is segmented into multiple stages: preliminary cleaning with sweeping brushes, wetting with moisture nozzles, main cleaning with scrubbing brushes, and final vacuuming with second suction nozzles. Each stage addresses specific types of dirt, collectively achieving complete dirt removal.
Solution Approach 2:
Moisture nozzles are positioned to wet the floor before the scrubbing brushes pass over it. This preliminary wetting loosens adhering dirt, making it easier for the scrubbing brushes to remove stubborn contaminants during the main cleaning phase.
2Reliability
If moisture nozzles are used to loosen adhering dirt, then cleaning effectiveness improves, but the liquid becomes contaminated with dirt particles
Solution Approach 1:
The first suction nozzle extracts loose dirt particles from the floor before the moisture nozzles are activated. This removes contaminants that would otherwise mix with the cleaning liquid, preventing liquid contamination while maintaining cleaning effectiveness.
Solution Approach 2:
The first suction nozzle performs preliminary extraction of loose dirt before the wetting and scrubbing phases. This sequencing ensures that only loosened dirt from the scrubbing phase enters the liquid, minimizing contamination.
3Reliability
If scrubbing brushes are used to rub off adhering dirt, then thorough cleaning is achieved, but cleaning performance deteriorates when liquid is already contaminated
Solution Approach 1:
The second suction nozzles are positioned to extract loosened dirt particles immediately after the scrubbing brushes pass over the floor. This continuous extraction prevents dirt accumulation in the liquid, maintaining cleaning performance throughout the operation.
Solution Approach 2:
The second suction nozzles operate continuously during the scrubbing phase, constantly removing loosened dirt particles. This continuous action ensures the cleaning liquid remains effective throughout the entire cleaning process.
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
This approach allows for thorough dirt removal from the floor, avoiding contamination of the cleaning liquid and enhancing the cleaning effectiveness by ensuring dirt is removed before being rubbed off, thus maintaining the cleanliness of the liquid used.
Implementation Method 1
one or more moisture nozzles directed at the floor to be cleaned being arranged behind the sweeping brushes
Implementation Method 2
a first suction nozzle that sucks up the dirt particles
Implementation Method 3
one or more movably drivable scrubbing brushes being arranged behind the moisture nozzles
Implementation Method 4
one or more second suction nozzles directed with their suction opening towards the floor are arranged on the sides of the scrubbing brushes
Data Source
Figure 1
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AI summary
The invention relates to a self-propelled floor cleaning machine with a chassis that drives the floor cleaning machine and has at least one drive wheel 2, 2' that can be driven in one direction of rotation, as well as a control device for controlling the movement of the floor cleaning machine. It has several rotatably driven sweeping brushes 7, 7' through which dirt particles located on the floor 3 to be cleaned can be conveyed to a first suction nozzle 8 for collecting the dirt particles.In the direction of movement 22 of the floor cleaning machine behind the sweeping brushes 7, 7', one or more moisture nozzles 11 directed towards the floor 3 to be cleaned are arranged, and in the direction of movement 22 of the floor cleaning machine behind the moisture nozzles 11, one or more movably driven scrubbing brushes 10 are arranged, on the sides of which facing away from the moisture nozzles 11, 17, one or more second suction nozzles 16 are arranged with their suction opening directed towards the floor 3.