Front-Load Washer Shipping Bolt Removal Verification System
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Solution Overview
Problem
Conventional front-loading laundry appliances often suffer from balancing issues due to forgotten shipping bolts and spacers, leading to excessive shaking and potential damage during operation.
Innovation Solution
A front-loading laundry appliance design that includes a shipping attachment assembly with a spacer and bolt, which can be detached only after entering a specific input pattern, ensuring proper removal before operation, and featuring a controller that verifies the correct sequence to enable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shipping bolts and spacers are installed to stabilize the drum during transport, then the drum suspension is protected from damage, but the appliance may experience excessive shaking and noise during operation if the bolts are not removed
Solution Approach 1:
The system performs preliminary verification by detecting whether shipping bolts and spacers are installed before allowing operation. The controller checks the status of detection elements (magnetic sensors, optical sensors, or mechanical switches) that monitor the presence of these components, and only enables operation after confirming their removal, thus preventing operational shaking and noise while maintaining transport stability
2Ease of operation
If conventional cord holders are used to encourage removal of shipping bolts, then users are prompted to remove bolts, but the cord holders can be cut without removing the bolts, making the solution ineffective
Solution Approach 1:
The system implements active feedback by using detection elements (magnetic sensors, optical sensors, or mechanical switches) to monitor the presence of shipping bolts and spacers. The controller receives signals from these detectors and provides feedback through the user interface, either preventing operation or displaying warnings until the components are removed. This closed-loop feedback mechanism ensures that users cannot bypass the system by cutting cord holders, as the detection elements directly monitor the actual presence of the bolts and spacers
Solution Approach 2:
The invention replaces the passive mechanical cord holder system with an active detection and control system. Instead of relying on users to cut cord holders to access the power cord, the system uses magnetic sensors, optical sensors, or mechanical switches to detect the presence of shipping bolts and spacers, and the controller uses this information to control appliance operation, providing a more reliable and automated verification mechanism
3Productivity
If installers and users are relied upon to remember to remove shipping bolts and spacers, then the appliance can be operated, but forgetting to remove them causes balancing problems and potential damage
Solution Approach 1:
The system performs self-verification by automatically detecting the presence or absence of shipping bolts and spacers through detection elements (magnetic sensors, optical sensors, or mechanical switches). The controller autonomously determines whether the appliance is ready for operation based on sensor inputs, eliminating the need for users to manually verify or remember to remove the components. This self-service approach ensures operational safety while maintaining productivity
Data Source
AI summary
A laundry appliance includes a cabinet, a tub, and a control panel for accepting inputs directing functionality of the laundry appliance. When movement of the laundry appliance is necessary, such as upon initial delivery, laundry appliance includes one or more shipping attachment assemblies comprising a shipping bolt and shipping bolt spacer, which connect to attachment elements of the tub and serve to stabilize the tub while laundry appliance is moved. The laundry appliance further includes identifiers for each shipping attachment assembly. The identifiers are only visible upon removal of the shipping attachment assembly. When moving of the laundry appliance is complete, the shipping attachment assemblies are removed, revealing the identifiers. The identifiers are provided through a network to ensure removal of the shipping attachment assemblies. Once all identifiers are accounted for, a sequence of inputs is provided that, when properly entered using the control panel of the laundry appliance, enables operation of the laundry appliance.