Adaptive Breathing Lid Structure for Can Pressure Balancing

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Solution Overview

Problem

Existing can sealing methods, such as aluminum films or tin foils, fail to adapt to significant pressure differences, leading to can deformation or rupture, and allowing gas exchange that deteriorates contents, especially in environments with varying pressures and temperatures.

Innovation Solution

A breathing lid with an airbag body comprising a connecting outer ring, soft inner ring, ventilation component, and mounting seat, featuring a silicone sleeve and air-permeable film, which allows controlled air exchange to balance internal and external pressures, preventing deformation and gas ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stress or pressure

If a thin film with waterproof and dustproof screen is arranged in the through hole of the sealing film, then air pressure balance is achieved, but gas exchange between inside and outside of the can occurs leading to product deterioration

Engineering Contradiction:

Improveair pressure balanceVSAvoidproduct deterioration

Core Design Contradiction:

Stress or pressureVSObject-affected harmful factors

Solution Approach 1:

The patent employs a flexible airbag body made of elastic material that can expand and contract to balance internal and external air pressure. This flexible membrane approach allows pressure equalization while maintaining a barrier that prevents gas exchange and product deterioration, resolving the contradiction between pressure balance and product protection.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The invention uses a composite structure combining the airbag body with the sealing film system. The airbag acts as a pressure-regulating composite element integrated into the sealing system, enabling both pressure adaptation and hermetic sealing functions simultaneously.

Inventive Principle:

Principle #40Composite materials

2Strength

If aluminum film or tin foil is used for sealing, then sealing integrity is maintained, but the can deforms or ruptures under significant pressure difference

Engineering Contradiction:

Improvesealing integrityVSAvoidpressure difference resistance

Core Design Contradiction:

StrengthVSStress or pressure

Solution Approach 1:

The patent introduces a dynamic pressure adaptation mechanism through the airbag body that can expand and contract in response to external pressure changes. This dynamic response allows the sealing system to maintain integrity under varying pressure conditions, preventing can deformation and rupture while preserving sealing strength.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the physical state and volume of the airbag body in response to pressure parameter changes. As external pressure varies, the airbag adjusts its volume accordingly, maintaining internal pressure equilibrium and preventing the sealing film from experiencing excessive stress that would cause deformation or rupture.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If the can is sealed hermetically, then product protection is improved, but the can bursts under low external pressure conditions

Engineering Contradiction:

Improveproduct protectionVSAvoidpressure resistance

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The airbag body functions as a feedback mechanism that continuously responds to external pressure changes. When external pressure decreases, the airbag expands to maintain internal pressure, preventing can burst. This feedback-based pressure regulation preserves hermetic sealing for product protection while dynamically adapting to pressure conditions.

Inventive Principle:

Principle #23Feedback

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 breathing lid effectively regulates air pressure, preventing can deformation and content deterioration by allowing controlled air release and intake, maintaining can integrity and product quality.

Implementation Method 1

The air-permeable film is arranged at a bottom end of the ventilation column... allow controlled air release and intake, maintaining can integrity and product quality

Methodology Applied

Scientific EffectGas permeation: Permeation

Implementation Method 2

air in the can enters a gap between the silicone sleeve and the ventilation column through the through hole in the ventilation column and then flows out of the gap between the silicone sleeve and the ventilation column

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS12534277B2Breathing lid capable of adaptively balancing air pressure

Publication Date: 2026.01.27 SHANGHAI FENGQI IND

AI summary

The disclosure discloses a breathing lid capable of adaptively balancing air pressure, specifically relating to the technical field of airbags capable of adapting to air pressure. The breathing lid capable of adaptively balancing air pressure includes a can lid and an airbag body. The airbag body is clamped in the can lid. The airbag body includes a connecting outer ring, a soft connecting inner ring, a ventilation component and a mounting seat. The connecting outer ring is in an annular structure, and the soft connecting inner ring is in a convex structure. The soft connecting inner ring is arranged on an inner side of the connecting outer ring, and the mounting seat is mounted on the inner side of the connecting outer ring. The mounting seat is provided with the ventilation component.