Container Air Composition Control via Adjustable Membrane Pressure
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Solution Overview
Problem
Existing internal air adjustment devices for containers, used to maintain freshness of agricultural products, cannot adjust the separation performance of gas separation films based on necessary gas components due to constant air pump flow rates and pressures.
Innovation Solution
An internal air adjustment device with a pressure regulator that adjusts the air pressure supplied to gas separation films, allowing for varying separation performance by using a mechanism such as flow rate adjustment valves or on-off valves with different apertures, and an adsorption unit with an adsorbent to separate nitrogen and oxygen, enabling the production of low and high oxygen concentration gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an air pump with constant flow rate is used to supply air to the gas separation film, then the device structure is simple, but the separation performance of the gas separation film cannot be adjusted according to necessary gas components
Solution Approach 1:
The patent introduces a pressure regulator that allows dynamic adjustment of the air pressure supplied to the gas separation film. By making the pressure adjustable rather than fixed, the system can adapt its separation performance to different gas component requirements while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent changes the pressure parameter of the air supplied to the gas separation film through a pressure regulator. By adjusting the pressure parameter, the separation performance can be optimized for different gas components without fundamentally changing the device structure.
2Measurement precision
If the pressure of air supplied to the gas separation film is increased to improve separation performance, then the separation performance improves, but the energy consumption increases
Solution Approach 1:
The patent uses a pressure regulator to optimize the pressure parameter of air supplied to the gas separation film. By precisely controlling the pressure to the minimum necessary level for effective separation, the system achieves good separation performance while minimizing energy consumption associated with air pumping.
Solution Approach 2:
The patent incorporates sensors to detect gas component concentrations and feeds this information back to the control unit, which adjusts the pressure regulator accordingly. This feedback mechanism ensures that pressure is optimized for separation performance while avoiding excessive energy consumption.
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
Enables precise control of oxygen and carbon dioxide concentrations within the container by regulating the separation pressure of the gas separation films, maintaining target values and extending the freshness of stored products.
Implementation Method 1
a first separation unit (41) that separates supply air from external air existing outside the storage box (1) by a gas separation film (85)
Implementation Method 2
a pressure regulator (39, 46, 66, 48, 68) that regulates a pressure of air that is supplied from the air pump (36, 37) to at least one of the first separation unit (41) and the second separation unit (61)
Data Source
AI summary
An internal air adjustment device that includes a gas composition adjustment unit including a gas separation film and that adjusts a composition of internal air existing inside a storage box, such as a container, includes a pressure regulating valve that regulates a pressure of air that is supplied from an air pump to the gas separation film of the gas composition adjustment unit.