Laundry Appliance Spray Arm Assembly for Stubborn Stain Pretreatment
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Solution Overview
Problem
Conventional laundry treating appliances often fail to completely remove stubborn stains during the wash cycle, necessitating manual pre-treatment by users.
Innovation Solution
A spray arm assembly with a spray head and faucet integrated into the laundry treating appliance, allowing for targeted liquid application and scrubbing action within the treating chamber, enhancing stain removal capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional laundry treating appliances use only a rotating container and preprogrammed cycles, then the appliance structure remains simple, but the ability to remove stubborn stains is insufficient
Solution Approach 1:
The spray arm assembly integrates multiple functions into a single component: it combines liquid distribution (through spray holes), mechanical scrubbing (through the scrub surface), and positioning (through the movable arm mechanism) to enable effective pre-treatment of stains within the existing appliance structure
Solution Approach 2:
The spray arm is designed to be movable between a stored position and an operational position, allowing it to move from a retracted state during normal operation to an extended position where the spray head contacts laundry items for targeted pre-treatment, providing dynamic adaptability without permanent structural complexity
2Reliability
If manual pre-treatment is performed outside the appliance, then stain removal effectiveness improves, but the loss of time and additional space requirements increase
Solution Approach 1:
The spray arm assembly enables preliminary stain treatment to be performed directly within the appliance before the main wash cycle begins, by positioning the spray head to contact specific stained areas and applying liquid and mechanical scrubbing action in advance, eliminating the need for separate pre-treatment steps outside the appliance
Solution Approach 2:
The appliance integrates multiple functions into the spray arm assembly: it can spray liquid onto stains, provide mechanical scrubbing through the scrub surface, and be positioned to access different areas of the drum, creating a multi-functional pre-treatment system that replaces external sink operations
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 spray arm assembly facilitates effective pre-treatment of stains by providing controlled liquid distribution and mechanical scrubbing, improving the removal of tough stains during the wash cycle without the need for external sinks or additional space.
Implementation Method 1
a spray arm assembly having a spray head and a faucet, with the spray head overlying the access opening when the cover is closed to spray liquid into the treating chamber
Implementation Method 2
a spray arm assembly having a spray head including a scrub surface
Data Source
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AI summary
A laundry treating appliance (10) includes a chassis (14) defining an interior. A rotatable treating chamber (32) is located within the interior and has an access opening (15). A cover (28) is movably mounted to the chassis (14) for selective movement between opened and closed positions to open and close the access opening (15). The laundry treating appliance (10) further comprises a spray arm assembly (100) having a spray head (102) and a faucet (104), with the spray head (102) overlying the access opening (15) when the cover (28) is closed to spray liquid into the treating chamber (32), and the faucet (104) operable to emit liquid into the treating chamber (32) when the cover (28) is opened.