Linear-Motor Conveyor Hygiene With Curved Stators and Tray Washing
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Solution Overview
Problem
Existing power-driven conveyors, particularly those using linear synchronous motors, face challenges in cleanliness due to large, flat surfaces that collect grease and food particles, leading to bacterial contamination and hard-to-clean undercut surfaces.
Innovation Solution
A conveyor system with encapsulated stators, sensors, and wires within a plastic frame, along with independently movable trays and magnetic levitation, ensuring no flat surfaces for contamination buildup and easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional linear-motor stators with large flat surfaces are used, then the conveyor can effectively drive trays, but the surfaces collect grease and food particles leading to bacterial contamination
Solution Approach 1:
The stator surface is designed with curved or rounded contours instead of flat surfaces. This curvature prevents grease and food particles from accumulating, as there are no flat surfaces for contamination buildup. The curved design allows contaminants to be easily washed away while maintaining the motor's driving function.
Solution Approach 2:
The conveyor system is divided into separable components including removable trays and modular stator sections. This segmentation allows individual components to be easily removed and cleaned independently, improving hygiene maintenance while preserving the overall conveyor functionality.
2Strength
If enclosed housings are used to protect stators, then the motors are protected from damage, but the housings create hard-to-access undercut surfaces that harbor bacteria
Solution Approach 1:
The housing design incorporates curved surfaces and eliminated undercut areas. By replacing sharp corners and recesses with smooth transitions and curved geometries, the housing maintains structural protection while preventing bacterial harboring zones.
Solution Approach 2:
The stator is extracted from its traditional enclosed housing and integrated directly into the rail structure. This elimination of separate housings removes the problematic undercut surfaces while maintaining necessary protection through the rail's own structural design.
3Device complexity
If trays are fixed to the conveyor, then the conveyor structure is simpler, but the trays cannot be easily removed for cleaning or replacement
Solution Approach 1:
The tray attachment mechanism transitions from fixed to dynamically adjustable. Magnets provide a flexible connection that allows trays to be easily attached and detached without complex mechanical fasteners, balancing structural simplicity with operational ease.
Solution Approach 2:
Traditional mechanical fastening systems are replaced with magnetic attachment. This substitution eliminates complex bolts, screws, or clips while providing secure yet easily removable tray attachment through magnetic force alone.
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 system provides a cleanable conveyor that minimizes contamination risks, enhances hygiene, and increases productivity through automated washing of trays.
Implementation Method 1
carriers driven by linear synchronous motors route individual carriers along various paths
Implementation Method 2
independently movable trays and magnetic levitation
Data Source
Figure 1~3
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Figure 7~10
AI summary
A tray conveyor in which plastic trays with rows of embedded translators are driven by stators. Washing stations in cleaning zones are provided to automatically clean empty trays in the conveyor's return path.