Laundry-care appliance having a controller
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Solution Overview
Problem
Laundry items that do not absorb water tend to float on the washing liquid in the washing drum, leading to inadequate cleaning as they are not sufficiently moved by the rotating drum during the laundry care process.
Innovation Solution
A laundry care appliance with a controller that activates the drain pump to pump washing liquid out of the tub and then back into it, while simultaneously rotating the washing drum to bring floating laundry items into contact with the drum, ensuring even wetting and improved cleaning of non-water-absorbent items like wool or silk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the washing drum rotates continuously during the pumping process, then floating laundry items are brought into contact with the drum and wetted effectively, but the washing liquid level drops and floating items may not be adequately cleaned
Solution Approach 1:
The washing drum is rotated periodically during the pumping process at specific time intervals rather than continuously, allowing the washing liquid level to be maintained while still achieving effective wetting of floating laundry items through intermittent contact with the rotating drum
2Manufacturing precision
If the drain pump pumps washing liquid out of the tub, then the washing liquid level drops and floating laundry items come into contact with the drum, but the pumped-out washing liquid needs to be returned to the tub
Solution Approach 1:
The drain pump pumps washing liquid out of the tub and then returns the pumped-out washing liquid back into the tub through the same or a different pathway, recovering the washing liquid that would otherwise be lost and maintaining the washing liquid volume while still achieving the desired laundry contact effect
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 method effectively wetts and cleans sensitive laundry items by ensuring they come into contact with the rotating washing drum, improving moisture penetration and washing effectiveness.
Implementation Method 1
a drain pump for pumping washing liquid is arranged in the line, and a controller for controlling the drum drive and the drain pump
Implementation Method 2
the controller is designed to activate the drum drive during the pumping process to the What to rotate the washing drum during a rotation time interval and to bring the laundry into contact with the washing drum
Implementation Method 3
The washing liquid pumped into the line by the drain pump is again pumped through the inlet opening during pumping back into the tub in order to supply the pumped-out washing liquid to the laundry in the washing drum again
Data Source
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AI summary
The invention relates to a laundry-care appliance (100) comprising a detergent container (105) for receiving laundry fluid, a washing drum (107) for receiving laundry, a drum drive (111) for rotating the washing drum (107), wherein the detergent container (105) has an outlet opening (115) and an inlet opening (117), wherein the outlet opening (115) is fluidically connected to the inlet opening (117) via a line (119), wherein a detergent pump (121) for pumping washing fluid is arranged in the line (119), and a controller (123) for controlling the drum drive (111) and the detergent pump (121). The controller (123) is designed to activate the detergent pump (121) during a circulation pumping process, in order to pump washing fluid out of the detergent container (105), through the outlet opening (115) into the line (119), and to supply the discharged washing fluid back to the detergent container (105) via the line (119) and via the inlet opening (117). The controller (123) is designed to activate the drum drive (111) during the circulation pumping process, in order to rotate the washing drum (107) during a rotation time interval, and to bring the laundry in contact with the washing drum (107).