Food Processor Magnetic Interlock for Contamination-Free Operation
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Solution Overview
Problem
Existing mechanical interlock systems in food processors are susceptible to contamination by liquids and food substrates, leading to impaired functionality and cleaning difficulties.
Innovation Solution
A non-contact interlock system using magnetic members and a sealed cavity to detect the proper positioning of the cover assembly, ensuring the motor is only powered when the container is correctly seated, thus preventing contact with contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical interlock system is used to detect cover positioning, then the interlock functionality is achieved, but the system is susceptible to contamination by liquids and food substrates
Solution Approach 1:
The patent replaces the traditional mechanical contact-based interlock system with a magnetic field-based detection system. Magnetic members are positioned on the cover assembly and base, interacting through a sealed cavity without physical contact. This substitution eliminates the mechanical components that would otherwise be exposed to and contaminated by food substrates and liquids, while maintaining reliable interlock functionality through magnetic attraction detection.
Solution Approach 2:
The patent employs a sealed cavity (essentially a protective enclosure) that isolates the magnetic detection components from the food processing environment. This sealed structure prevents liquids and food substrates from contacting the interlock mechanism, thereby eliminating contamination issues while allowing the magnetic field to penetrate through the sealed barrier for detection purposes.
2Ease of operation
If mechanical interlock components are exposed to the food processing environment, then the interlock mechanism can detect cover positioning, but cleaning becomes difficult
Solution Approach 1:
By replacing exposed mechanical components with magnetic field interaction through a sealed cavity, the system eliminates parts that would require cleaning. The magnetic members remain isolated within the sealed environment, making the exterior surfaces easy to clean while maintaining detection functionality through non-contact magnetic field penetration.
Solution Approach 2:
The patent extracts the sensitive interlock detection components (magnetic members) from the food-exposed environment by positioning them within a sealed cavity. This separation allows the detection mechanism to remain isolated from contamination sources, making the food-contact surfaces simple and easy to clean while preserving the interlock detection capability.
3Object-affected harmful factors
If a non-contact magnetic interlock system is used, then contamination is prevented, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical linkages, moving parts, and contact-based detection mechanisms with a simpler magnetic field-based system. The magnetic members and sealed cavity create a straightforward non-contact detection approach that eliminates the need for complex mechanical assemblies, thereby reducing overall device complexity while achieving contamination resistance.
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 reliable and clean interlock mechanism that is resistant to contamination, ensuring consistent operation and easy maintenance by using magnetic repulsion to actuate a switch within a sealed cavity, ensuring the motor is only powered when the container is properly positioned.
Implementation Method 1
The plunger member moves to the actuated position as the latch mechanism moves to the latched position due to a repulsion force between the first magnetic member of the latch mechanism and the upper magnetic member of the plunger
Implementation Method 2
The lower magnetic member moves into the detection zone of the magnetically controlled switch to close the switch and the electric control circuit when the plunger is in the actuated position
Data Source
AI summary
A food processing container includes a food processing chamber and a cover assembly with a latch mechanism operable between latched and unlatched positions. The latch mechanism includes a first magnetic member disposed therein. An interlock assembly is disposed outside of and adjacent to the food processing chamber and includes a sealed cavity with a plunger member moveable disposed within the sealed cavity. The plunger is operable between at-rest and actuated positions within the sealed cavity and includes upper and lower magnetic members disposed at opposite ends of the plunger member. The plunger member moves to the actuated position as the latch mechanism moves to the latched position due to a repulsion force between the first magnetic member and the upper magnetic member, and further wherein the lower magnetic member moves into the lower portion of the sealed cavity as the latch mechanism moves to the latched position.