Laundry appliance with controls
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Solution Overview
Problem
Conventional laundry care devices require high energy to rotate the laundry drum for effective heat and mass exchange, leading to increased energy consumption.
Innovation Solution
A laundry care device with a weight detection system that adjusts the rotation speed of the drum based on the laundry load, using different operating modes to optimize wetting and reduce energy consumption, including speeds between 30 rpm and 120 rpm depending on the load weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drum rotates at high speed to ensure effective contact between laundry and washing liquid, then heat and mass exchange is improved, but energy consumption increases significantly
Solution Approach 1:
The drum rotation speed is dynamically adjusted based on the detected laundry weight. The control unit selects different rotation speeds from a predefined set according to the load size, optimizing the balance between washing effectiveness and energy consumption for each specific operating condition.
Solution Approach 2:
The system changes the operational parameter (rotation speed) based on the detected load weight. By establishing a relationship between laundry weight and optimal rotation speed, the system adapts the drum speed to match the actual washing needs, avoiding unnecessary energy consumption while maintaining effective washing.
2Use of energy by moving object
If the drum rotates at low speed to reduce energy consumption, then energy consumption is reduced, but effective wetting of laundry is compromised
Solution Approach 1:
The drum rotation speed is dynamically adjusted based on the detected laundry weight. The control unit selects different rotation speeds from a predefined set according to the load size, optimizing the balance between washing effectiveness and energy consumption for each specific operating condition.
Solution Approach 2:
The system changes the operational parameter (rotation speed) based on the detected load weight. By establishing a relationship between laundry weight and optimal rotation speed, the system adapts the drum speed to match the actual washing needs, avoiding unnecessary energy consumption while maintaining effective washing.
3Reliability
If a fixed high rotation speed is used for all load sizes, then washing effectiveness is maintained, but energy consumption increases for small loads
Solution Approach 1:
The drum rotation speed is dynamically adjusted based on the detected laundry weight. The control unit selects different rotation speeds from a predefined set according to the load size, optimizing the balance between washing effectiveness and energy consumption for each specific operating condition.
Solution Approach 2:
The system changes the operational parameter (rotation speed) based on the detected load weight. By establishing a relationship between laundry weight and optimal rotation speed, the system adapts the drum speed to match the actual washing needs, avoiding unnecessary energy consumption while maintaining effective washing.
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 ensures effective wetting of laundry while reducing energy consumption by up to 40% for drum rotation and 50% for heating the washing liquid compared to conventional devices.
Implementation Method 1
a weight detection device designed to detect the weight of the laundry received in the drum
Implementation Method 2
the drum having a plurality of projections designed to move the laundry received in the drum when the drum is rotated
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present invention relates to a laundry care appliance (100) comprising a tub (105) for receiving washing liquid (109), a washing drum (107) for receiving laundry, wherein the washing drum (107) is arranged in the tub (105), wherein the washing drum (107) has a plurality of projections (113) which are designed to move the laundry (111) received in the washing drum (107) when the washing drum (107) is rotated, a drum drive for rotating the washing drum (107), a weight detection device which is designed to detect the weight of the laundry (111) received in the washing drum (107), and a control (104) for controlling the drum drive.The controller (104) is configured, during a first operating mode, to activate the drum drive to rotate the washing drum (107) at a first speed (129-1) when the weight of the laundry (111) detected by the weight sensing device falls below a weight limit, wherein the first speed (129-1) is less than the base speed (131) of the washing drum (107) at which the laundry (111) contained in the washing drum (107) is in contact with the rotating washing drum (107). The controller (104) is configured, during a second operating mode, to activate the drum drive to rotate the washing drum (107) at a second speed (129-2) when the weight of the laundry (111) detected by the weight sensing device exceeds the weight limit, wherein the second speed (129-2) is greater than the base speed of the washing drum (107).