Dishwasher Rinse Temperature Control for Low-Temperature Wash Water
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Solution Overview
Problem
Conventional dishwashers often fail to effectively rinse dishes when the washing water temperature is low, leading to prolonged rinsing times or incomplete rinsing cycles, as the rinse is not supplied at the correct temperature, resulting in inadequate cleaning.
Innovation Solution
A dishwasher equipped with a temperature detecting unit and a control unit that adjusts the rinse dispensing temperature based on the washing water temperature, ensuring the rinse is dispensed when the water reaches a suitable temperature for effective rinsing, thereby stabilizing the rinsing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the washing water temperature is low, then the heating time is extended, but the rinsing cycle is delayed and rinse supply is unstable
Solution Approach 1:
The system performs preliminary detection of washing water temperature before the rinsing cycle begins. By detecting the temperature in advance and comparing it with the preset rinse supply temperature, the system can determine whether to proceed with the rinsing cycle or extend heating first, preventing timing delays and ensuring stable rinse supply.
Solution Approach 2:
The control unit continuously monitors the washing water temperature and uses this feedback to adjust the rinsing cycle timing. When the temperature is insufficient, the system extends heating time; when sufficient, it proceeds with rinsing. This closed-loop feedback mechanism ensures optimal rinsing timing regardless of initial water temperature variations.
2Reliability
If the washing water temperature is too low, then the rinse supply is skipped, but the dishes are not sufficiently rinsed
Solution Approach 1:
The system dynamically adjusts the rinse supply decision based on real-time temperature detection. Instead of a fixed threshold approach, the control unit compares the detected temperature with the preset rinse supply temperature and adaptively determines whether to supply rinse or extend heating. This dynamic adjustment ensures both reliable rinse supply and effective dish rinsing by making the decision based on actual temperature conditions rather than rigid rules.
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 solution ensures that dishes are consistently and effectively rinsed, preventing incomplete rinsing cycles and reducing the risk of rinse residue on dishes, while also optimizing rinsing time and reliability across varying water temperatures.
Implementation Method 1
a temperature detecting unit for detecting a temperature of washing water supplied
Implementation Method 2
a heating unit for heating the washing water stored in the sump
Data Source
AI summary
There is provided a dishwasher and a method of controlling the dishwasher. The dishwasher includes a temperature detecting unit for detecting a temperature of washing water supplied, a rinse dispensing unit for dispensing rinse when washing water is heated up to a rinse dispensing temperature, and a control unit for varying the rinse dispensing temperature in accordance with the temperature of the washing water supplied.