Food Processor Lid with Check Valve to Prevent Pressure Dislodgement
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Solution Overview
Problem
Food and beverage processing devices often experience lid dislodgement due to pressure changes and air movement within the vessel, particularly when the food level is high, leading to safety and operational issues.
Innovation Solution
A lid with a check valve and relief valve system that allows air to escape from the interior of the vessel while preventing air from entering, ensuring the lid remains securely in place during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is sealed to prevent leakage, then sealing performance is improved, but air pressure builds up causing lid dislodgement
Solution Approach 1:
The sealing system is segmented into multiple functional zones: a peripheral seal for primary sealing, and a check valve mechanism with movable plug for controlled air release. This segmentation allows the lid to maintain sealing while managing internal pressure through the valve component.
Solution Approach 2:
The check valve plug acts as an intermediary element between the sealed interior and exterior environment. It selectively allows air to escape when pressure exceeds a threshold while preventing air ingress during normal operation, thus mediating the pressure balance without compromising the seal.
2Stability of the object's composition
If the lid is tightly secured to prevent dislodgement, then lid position stability is improved, but air pressure buildup occurs
Solution Approach 1:
The harmful excess air pressure is extracted from the sealed system through the check valve mechanism. The valve plug is designed to be displaceable by pressure forces, automatically opening to vent air when internal pressure exceeds external pressure, thus relieving stress without requiring lid loosening.
3Stability of the object's composition
If a check valve is added to manage air pressure, then lid position stability is improved, but device complexity increases
Solution Approach 1:
The check valve mechanism is merged with the lid body structure itself. The valve seat, plug, and spring components are integrated into the lid's central opening area, eliminating the need for separate external valve assemblies. This combining reduces overall device complexity while maintaining the pressure management function.
Solution Approach 2:
The check valve mechanism is designed to be self-regulating through the interaction of spring force and pressure differential. The plug automatically opens when internal pressure exceeds the spring preload and closes when pressure equalizes, requiring no external control or complex actuation mechanisms.
4Stability of the object's composition
If interference fit seals and locking structures are used to prevent lid dislodgement, then lid position stability is improved, but device complexity and difficulty of operation increase
Solution Approach 1:
The pressure forces that would normally cause lid dislodgement are converted into a beneficial sealing force. The check valve allows controlled air escape during lid installation, preventing pressure buildup that would resist sealing, while the spring-loaded plug ensures reliable sealing contact without requiring complex locking structures.
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 solution effectively prevents lid dislodgement by managing air pressure and flow, enhancing the safety and reliability of food processing operations by maintaining a secure seal during blending and processing.
Implementation Method 1
a lid with a check valve and relief valve system that allows air to escape from the interior of the vessel while preventing air from entering
Data Source
Figure 1~2
Figure 3~4
Figure 5a
AI summary
A lid for a food processing device with a rotating blade within a vessel has an one-way valve for allowing air to escape the vessel.