Rack for dishwasher, dishwasher having the same and manufacturing method thereof
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Solution Overview
Problem
Conventional dishwasher racks made of plastic materials face challenges in drying performance due to low heat capacity, difficulty in applying fluoride coatings, high manufacturing costs, and issues with surface reactivity and durability, leading to reduced drying efficiency and increased residual water.
Innovation Solution
A fluorine-combined layer is formed by molecular binding of fluoride onto the surface of plastic members in dishwasher racks, enhancing wetting properties, reactivity, and reducing friction, which improves drying performance and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoride coating is applied to plastic members to enhance drying performance, then drying performance is improved, but manufacturing cost increases and coating application becomes difficult
Solution Approach 1:
The invention changes the chemical parameters of the plastic member surface by introducing fluorine-containing groups through reaction with fluorine gas or fluorinated compounds. This chemical modification alters surface energy and wetting properties without requiring physical coating deposition, thereby improving drying performance while avoiding the manufacturing complexities of conventional coating processes
Solution Approach 2:
The invention replaces the mechanical coating process (physical deposition of fluoride layers) with a chemical reaction process where fluorine is directly incorporated into the plastic surface molecules. This substitution eliminates the need for separate coating application steps, curing processes, and quality control measures for coating adhesion, thereby simplifying manufacturing
2Reliability
If conventional fluoride coating is applied to plastic members, then drying performance is enhanced, but manufacturing cost increases due to high fluoride input
Solution Approach 1:
The invention optimizes the fluorine content parameter on the plastic surface by controlling the reaction conditions to achieve sufficient surface energy modification with minimal fluorine incorporation. This allows achieving the desired drying performance enhancement while significantly reducing the total fluoride input compared to conventional coating methods that require thick fluoride layers
Solution Approach 2:
The invention concentrates fluorine modification only on the surface region of the plastic member where it is needed for drying performance, rather than incorporating fluoride throughout the entire material volume. This localized surface modification reduces overall fluoride consumption while maintaining the drying enhancement effect
3Reliability
If fluoride is coated on plastic member surface, then drying performance is improved, but coating durability decreases due to low reactivity and gas expansion
Solution Approach 1:
The invention replaces physical coating deposition with chemical bonding of fluorine to the plastic surface molecules. This chemical bonding creates a permanent integral part of the plastic surface structure rather than a separate coating layer, eliminating the adhesion problems and gas entrapment issues that cause conventional coatings to detach during heating cycles
Solution Approach 2:
The invention creates a composite structure where fluorine-containing groups are chemically integrated into the plastic polymer matrix at the surface. This forms a unified material system rather than a layered composite, eliminating the interface between coating and substrate where gas accumulation and delamination occur
4Ease of manufacture
If plastic members are used for rack components, then ease of manufacture is improved, but drying performance decreases due to low heat capacity
Solution Approach 1:
The invention changes the surface thermal and wetting parameters of the plastic material by introducing fluorine-containing groups. This surface modification enhances the plastic's ability to promote water evaporation and droplet removal, thereby improving drying performance while maintaining the inherent manufacturing advantages of plastic materials
Solution Approach 2:
The invention applies the fluorine modification only to the surface region of the plastic components that contact water and require drying enhancement, while the bulk material retains its original plastic properties and manufacturing characteristics. This localized modification preserves ease of manufacture while achieving improved drying performance
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
The fluorine-combined layer increases the surface energy of plastic members, reducing residual water and enhancing drying performance, while also reducing manufacturing costs and improving the durability and smooth operation of dishwasher components.
Implementation Method 1
a fluorine-combined layer formed by molecular binding of fluoride onto a surface of parts formed of plastic members
Implementation Method 2
enhancing the wetting properties of the surface of plastic members
Data Source
AI summary
Disclosed are a rack for a dishwasher, a dishwasher having the same and a manufacturing method thereof. The rack for dishwasher includes a rack body that accommodates therein objects to be cleaned and is disposed within a washing space of the dishwasher, and a fluorine-combined layer formed by molecular binding of fluoride onto a surface of parts formed of a plastic member, enabling the wetting property on the surface of plastic member to be increased to enhance the wetting performance, and friction on the motion parts to be reduced.