Dishwasher Wash Program Adaptation for Variable Intake Water Temperature
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Solution Overview
Problem
Domestic dishwashers' washing and drying efficiency is affected by environmental conditions, leading to inconsistent cleaning and drying results and reduced energy efficiency when operated under non-standard conditions.
Innovation Solution
The execution control device adapts parameters of washing programs based on the temperature of intake water, such as rotary speed of the circulating pump, duration of wash cycles, and detergent action, to maintain consistent cleaning and drying effects across varying water temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dishwasher operates with fixed washing program parameters, then the control system is simple, but the washing and drying efficiency varies under different environmental conditions
Solution Approach 1:
The washing program parameters are made dynamically adjustable based on detected environmental conditions. The control device automatically modifies parameters such as water temperature, circulation speed, and cycle duration according to the detected intake water temperature and ambient conditions, allowing the system to adapt to varying environmental conditions while maintaining washing efficiency.
Solution Approach 2:
The system incorporates sensors that detect environmental conditions (intake water temperature, ambient temperature) and provide feedback to the control device. Based on this feedback, the control device automatically adjusts washing program parameters to optimize performance under different conditions, resolving the contradiction between adaptability and control complexity.
2Reliability
If the dishwasher uses standard washing programs, then the operation is simple, but the cleaning and drying results are inconsistent under non-standard conditions
Solution Approach 1:
The dishwasher automatically detects environmental conditions and self-adjusts washing program parameters without user intervention. The control device modifies water temperature, circulation intensity, and cycle timing based on detected conditions, ensuring consistent cleaning results while maintaining ease of operation through automated adaptation.
Solution Approach 2:
The system changes key washing parameters (temperature, circulation speed, cycle duration) based on detected environmental conditions. This dynamic parameter adjustment ensures reliable and consistent cleaning and drying results across varying conditions while keeping the user interface simple and easy to operate.
3Use of energy by moving object
If the dishwasher operates without parameter adaptation, then the device complexity is low, but the energy efficiency decreases under varying water temperatures
Solution Approach 1:
The system dynamically adjusts energy-consuming parameters such as heating power, circulation pump speed, and cycle timing based on detected intake water temperature and ambient conditions. This dynamic optimization improves energy efficiency by adapting to varying conditions while using sensors and automated control to manage the increased system complexity.
Solution Approach 2:
The control device modifies operational parameters (heating temperature, circulation intensity, cycle duration) based on environmental detection to optimize energy efficiency. The system automatically adjusts these parameters to minimize energy consumption under varying water temperatures and conditions, resolving the trade-off between energy efficiency and control complexity through automated adaptation.
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 adaptation ensures a satisfactory washing result while improving energy and time efficiency, allowing the dishwasher to operate efficiently and cost-effectively regardless of the intake water temperature, from 10°C to 60°C.
Implementation Method 1
An electrical heating device is arranged in the circulation loop in this case, allowing the dishwashing water to be brought to a predetermined temperature during dishwashing
Implementation Method 2
The domestic dishwasher also has a circulating pump, which allows dishwashing water that collects in a lower region of the washing compartment to be sprayed onto the dishes by means of a spray device
Implementation Method 3
The known dishwasher also has drain pump, which allows dishwashing water to be pumped out when it is no longer required
Implementation Method 4
The dishwashing water then returns to the lower region of the washing compartment due to gravity, thereby forming a closed circulation loop
Data Source
AI summary
A domestic dishwasher, comprising an attachment device for receiving intake water and an execution control device in which are stored one or more washing programs for controlling an execution of a wash cycle for washing dishes, wherein the execution control device is designed to adapt at least one parameter of at least one of the washing programs to a temperature of the fresh water.