Vacuum Container Cover With Segmented One-Way Valves
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Solution Overview
Problem
Existing vacuum preservation containers cannot maintain a vacuum state effectively due to air trapped within the container body, leading to a short preservation period and high production costs associated with complex structures and the need for lubricants, which can cause pollution and complicate cleaning.
Innovation Solution
A container cover with a simple structure featuring an air extraction assembly comprising an outer and inner cover with one-way valves, eliminating the need for lubricants, allowing for efficient air extraction and retraction to create a vacuum environment within the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex pressing block structure with sliding seals is used for vacuum pumping, then vacuum preservation is achieved, but device complexity and production cost increase
Solution Approach 1:
The pressing block is divided into outer handle and inner handle as separate segments that can move relative to each other. The sealing component is segmented into a sealing ring that can transition between different sealing positions. This segmentation allows the system to achieve vacuum pumping function while reducing structural complexity compared to a monolithic design.
Solution Approach 2:
The pressing block employs dynamic sealing where the sealing ring can move between two positions: a first sealing position that seals the exhaust port, and a second sealing position that seals the air inlet port. This dynamic positioning allows the same sealing component to serve multiple functions during different phases of the vacuum pumping cycle, reducing the need for multiple separate sealing elements.
2Ease of operation
If lubricant is added for sliding seal fit, then sealing smoothness is improved, but pollution risk and cleaning difficulty increase
Solution Approach 1:
The sealing system is designed to be self-lubricating through the use of food-grade lubricant that is intentionally added to the sliding seal interface. The system accepts the presence of lubricant as part of its normal operation, and the container is designed to be easily disassembled for cleaning, allowing users to remove and clean the pressing block components that contain the lubricant, thereby mitigating pollution concerns.
3Duration of action of stationary object
If vacuum pumping cavity is used to extract air, then preservation period is prolonged, but production cost increases
Solution Approach 1:
The air extraction assembly is nested within the container cover structure. The pressing block with its inner and outer handles is nested within the container cover, and the sealing ring is nested within the pressing block's positioning slot. This nested arrangement allows the vacuum pumping functionality to be integrated into the existing container cover without requiring a completely separate vacuum pumping device, thereby reducing production costs while maintaining preservation effectiveness.
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 container cover effectively maintains a vacuum state, prolonging the preservation period of contents without the need for lubricants, reducing production costs, and simplifying cleaning and assembly processes.
Implementation Method 1
The outer cover is made of elastic material and has an arch-shaped first top wall
Implementation Method 2
the second through hole is provided with a first one-way valve, and the third through hole is provided with a second one-way valve; the air flow direction of the first one-way valve is from outside of the air extraction cavity to inside of the air extraction cavity, and the air flow direction of the second one-way valve is from inside of the air extraction cavity to outside of the air extraction cavity
Data Source
AI summary
Disclosed are a container cover and a vacuum preservation container. The container cover comprises a cover body and an air extraction assembly, wherein a first through hole is provided in the cover body, the air extraction assembly comprises an outer cover and an inner cover, the inner cover is arranged on an upper end of the first through hole in a sealing manner, a second through hole and a third through hole are provided in the inner cover, the second through hole is in communication with the first through hole, a first one-way valve is arranged in the second through hole, and a second one-way valve is arranged in the third through hole.