Dishwasher Forced-Air Drying with Variable-Section Blowing Duct
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Solution Overview
Problem
Conventional dishwashers face challenges with long drying times and low drying efficiency, particularly when using latent heat, and high energy consumption when employing separate heaters for drying.
Innovation Solution
A dishwasher design incorporating a blowing duct and blowing means that introduces external air to force wet steam out of the washing tank, utilizing variable cross-sectional areas in the passage to optimize airflow and discharge ports to efficiently disperse steam, thereby shortening drying time and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If latent heat is used for drying dishes, then energy consumption is reduced, but drying time becomes long and drying efficiency is remarkably low
Solution Approach 1:
The blowing means operates during the washing cycle to pre-remove excess water from dishes before the drying phase begins. This preliminary action reduces the water load that needs to be evaporated during drying, thereby shortening drying time without requiring additional energy input.
Solution Approach 2:
The blowing means continues to operate throughout the drying phase, maintaining continuous airflow to constantly remove moisture from dishes. This continuous action prevents moisture accumulation and maintains high drying efficiency throughout the entire drying cycle, unlike intermittent methods.
2Productivity
If a separate heater is used to spray high temperature air for drying dishes, then drying efficiency is improved, but energy consumption becomes large and electric charges are increased
Solution Approach 1:
The blowing means utilizes the washing water already heated during the washing cycle to generate steam for drying. This self-service approach converts waste heat that would otherwise be discarded into a useful drying resource, eliminating the need for separate heating energy input while maintaining high drying efficiency.
Solution Approach 2:
The system recovers the heat energy from washing water that would normally be discarded after the washing cycle. By capturing and utilizing this waste heat to generate steam for drying, the system converts a waste resource into a valuable drying medium, significantly reducing overall energy consumption.
3Loss of time
If blowing means is used to force wet steam out of the washing tank, then drying time is shortened, but device complexity increases due to additional components
Solution Approach 1:
The blowing means serves multiple functions: it removes excess water from dishes during washing, generates steam from heated washing water, and provides forced airflow during drying. This multi-functionality allows a single component to address multiple drying-related needs, reducing the need for separate dedicated components for each function.
Solution Approach 2:
The blowing means is integrated with the existing washing water circulation and heating systems. By merging the blowing function with the water circulation pump and heat exchanger, the system creates a coordinated drying mechanism that utilizes existing infrastructure, thereby minimizing the addition of separate complex components.
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 significantly reduces drying time and enhances energy efficiency by effectively dispersing wet steam, minimizing energy consumption and improving drying conditions.
Implementation Method 1
a blowing means configured to be connected to the blowing duct to provide external air to the blowing duct, and allow wet steam inside the washing tank to forcedly flow to the front of the main body
Implementation Method 2
the passage has at least one or more variable sections that change a cross-sectional area
Implementation Method 3
a discharging port provided in the passage to spray the air to the outside
Data Source
AI summary
A dishwasher capable of shortening drying time is disclosed. The present device comprises: a main body having a washing tub provided therein; a door rotatably coupled to the main body so as to open and close the washing tub; a blowing duct having a passage provided between the outside of the washing tub and the inside of the main body so as to provide a flow path through which the air flowing from the outside flows, and a discharge port provided at the passage so as to spray air to the outside; and a blowing means connected to the blowing duct so as to provide the external air into the blowing duct, and forcibly causing wet steam in the washing tub to flow to the front of the main body, wherein the passage has at least one variable section for changing the cross sectional area thereof.