Food Processor Magnetic Interlock to Prevent Contamination
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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 reliability issues and difficulty in cleaning.
Innovation Solution
A non-contact interlock system using magnetic members and a sealed cavity to detect the proper positioning of the cover assembly, preventing motor operation only when the cover is securely closed, thus avoiding direct contact with food and liquids.
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, allowing the interlock status to be detected through magnetic interaction without mechanical contact between moving parts. This eliminates the problem of food and liquid contamination while maintaining reliable interlock functionality.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the cover assembly and base to transmit interlock status information. Instead of direct mechanical contact, the magnetic field acts as a mediator that can detect cover positioning through non-contact means, preventing contamination while ensuring reliable detection.
2Reliability
If a mechanical interlock system with moving parts is used, then the interlock functionality is achieved, but cleaning becomes difficult
Solution Approach 1:
The patent replaces mechanical moving parts with magnetic field-based detection components that have no moving parts requiring maintenance or cleaning. The magnetic members are positioned such that they do not create crevices or gaps where food particles could accumulate, making the appliance easier to clean while maintaining interlock functionality.
Solution Approach 2:
The patent extracts the moving parts from the interlock detection mechanism, leaving only stationary magnetic members that can be easily cleaned. By removing the mechanical components that create cleaning difficulties, the system maintains its interlock functionality while significantly improving ease of cleaning.
3Object-affected harmful factors
If a non-contact magnetic interlock system is used, then contamination is prevented, but the system complexity increases
Solution Approach 1:
The patent replaces a complex mechanical interlock system with a simpler magnetic field-based system. The magnetic members can be integrated into existing appliance components without requiring additional complex mechanisms, thereby reducing overall system complexity while preventing contamination through non-contact operation.
Solution Approach 2:
The magnetic members serve multiple functions: they provide the interlock detection capability, prevent contamination through non-contact operation, and can be integrated into existing appliance structures. This multi-functionality reduces the need for separate components, thereby managing system complexity while achieving contamination prevention.
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 ensures reliable operation and easy cleaning by maintaining a sealed environment, preventing contamination and ensuring consistent functionality.
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.