Dishwasher Steam Drying Control for Lower-Energy Drying Cycles
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Solution Overview
Problem
Conventional dishwashers are inefficient in their drying cycles, consuming a large amount of energy as they rely on heating air to evaporate water, which is not only costly but also inefficient in terms of energy usage.
Innovation Solution
The dishwasher employs a steam generator to dry dishes during the drying cycle, eliminating the need for an auxiliary heater by using steam to increase the temperature of the washing compartment, allowing for efficient evaporation of moisture without heating the air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a heater is used to heat air for drying dishes, then drying function is achieved, but energy consumption increases significantly
Solution Approach 1:
The invention changes the physical state of water from liquid to steam by heating it to generate high-temperature steam. This steam is then introduced into the drying chamber to provide heat for evaporating moisture from dishes, replacing the conventional air heating method and significantly reducing energy consumption.
Solution Approach 2:
The invention utilizes the phase transition of water from liquid to steam. Water is heated in a steam generator to produce steam, which then condenses on the cooler surfaces of dishes during drying, releasing latent heat that efficiently evaporates remaining moisture. This phase transition mechanism provides highly efficient heat transfer compared to conventional air heating.
2Loss of energy
If steam is used to dry dishes instead of heating air, then energy efficiency is improved, but the system complexity increases
Solution Approach 1:
The steam generator serves multiple functions: it generates steam for drying, provides heating during washing cycles, and can be used for sanitization. By integrating these functions into a single device, the invention achieves energy efficiency improvements without proportionally increasing system complexity.
Solution Approach 2:
The invention introduces steam as an intermediary medium between the heat source and the dishes. Instead of directly heating air, the steam generator produces steam that acts as a heat carrier, condensing on dish surfaces to transfer heat efficiently. This intermediary approach improves energy efficiency while the steam generation mechanism remains relatively simple.
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 reduces energy consumption and enhances drying efficiency by using steam to reach a preset temperature, allowing for effective drying without the need for an auxiliary heater, thus making the drying cycle more energy-efficient.
Implementation Method 1
a steam generator (300) to supply steam to the washing compartment (150)
Implementation Method 2
The supplied steam can evaporate water on the dishes in the washing compartment (150)
Implementation Method 3
The supplied steam can evaporate water on the dishes in the washing compartment (150)
Data Source
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AI summary
Dishwashers and methods of control for operation of dishwashers are disclosed. The operation of the dishwasher can include a drying cycle which uses a steam generator (300) to supply steam to heat a washing compartment (150). The steam can evaporate moisture on the dishes in the washing compartment. When a condition of the dishwasher is met, such as a temperature or operation time meeting a preset value, an exhaust fan (190) may exhaust air from inside the washing compartment (150). The operation of the dishwasher can improve power consumption and dry dishes more efficiently.