Dishwasher with spray system assembly
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Solution Overview
Problem
Existing automatic dishwashers lack a removable and efficiently attachable spray system component that allows for easy maintenance and effective distribution of wash liquid, leading to potential inefficiencies in cleaning cycles.
Innovation Solution
A spray system assembly with a rotatable sprayer featuring a hub and spray head, where the hub has a second threaded portion that securely engages with a first threaded portion on the sprayer mount, enabling easy attachment and detachment for maintenance while allowing the sprayer to rotate freely, ensuring consistent fluid distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the spray system components are made removable for maintenance, then ease of repair is improved, but device complexity increases due to additional connection mechanisms
Solution Approach 1:
The spray system is divided into separate components (spray head, distributor, mount) that can be independently removed and reattached. The threaded connection mechanism enables each component to be segmented for maintenance while maintaining a simple coupling interface that reduces overall system complexity during assembly.
Solution Approach 2:
The spray head and distributor components are extracted from the fixed spray system, allowing them to be removed for maintenance. The threaded portions enable these extracted components to be easily reattached, improving repair accessibility without requiring complex disassembly procedures.
2Productivity
If the sprayer is designed to rotate freely for fluid distribution, then wash liquid distribution efficiency is improved, but attachment reliability may worsen due to rotational movement
Solution Approach 1:
The sprayer hub is designed with rotational freedom to optimize wash liquid distribution patterns. The threaded connection between the hub and mount provides a secure attachment that maintains reliability while allowing the necessary rotational movement for effective spraying.
Solution Approach 2:
The threaded connection parameters (thread pitch, engagement length) are optimized to provide sufficient attachment reliability while accommodating the rotational movement required for effective fluid distribution. The spatial relationship of threaded portions ensures secure coupling despite rotation.
3Reliability
If threaded portions extend beyond each other for secure engagement, then attachment reliability is improved, but manufacturing precision requirements worsen
Solution Approach 1:
The first and second threaded portions are designed with asymmetric spatial relationships, where the second threaded portion extends beyond the first when coupled. This asymmetric design provides secure engagement and reliability while accommodating reasonable manufacturing tolerances through the extended thread engagement.
Solution Approach 2:
The threaded portions are pre-configured with specific spatial relationships during manufacturing to ensure proper alignment upon assembly. The extended thread engagement is built into the design to provide self-aligning characteristics that reduce the impact of manufacturing precision variations.
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 design enhances the efficiency of wash liquid distribution and maintenance accessibility, improving the overall cleaning performance and user experience by ensuring reliable attachment and detachment of the sprayer, thus optimizing the dishwasher's operation.
Implementation Method 1
a second threaded portion threadable with the first threaded portion, and spatially related so that the second threaded portion is threaded onto and beyond the first threaded portion when the rotatable sprayer is coupled to the sprayer mount
Data Source
AI summary
A spray system assembly for a household appliance, such as a dishwasher, wherein the spray system assembly can include a diverter housing with a diverter valve, a sprayer mount, and a rotatable sprayer. The rotatable sprayer can include a hub and a spray head. The hub of the rotatable sprayer is removably attached to the sprayer mount that is coupled to the diverter housing.