Vacuum Insulator Dual Adsorbent Layout for Long-Term Refrigeration
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Solution Overview
Problem
Vacuum insulators in refrigerators face challenges in maintaining long-term insulation performance due to gas adsorption issues, where adsorbents either lose effectiveness quickly or fail to adsorb gases in non-porous environments, leading to dew condensation and reduced thermal conductivity.
Innovation Solution
A dual adsorbent system where a portion of the adsorbent is contained within a container and dispersed in the space between the container and the outer envelope, allowing for early-stage gas adsorption and maintaining long-term performance by ensuring continuous adsorption even when the outer adsorbent's effectiveness decreases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the adsorbent is disposed in the floor of the plurality of insertion holes, then the adsorption time of moisture and gas components in the core material can be reduced, but the adsorption time of the adsorbent is reduced such that inactivation of the adsorbent is put forward and thus an adsorption performance cannot be exhibited for a long term
Solution Approach 1:
The adsorbent is divided into two functional parts: one part disposed in insertion holes for rapid adsorption of inside gas, and another part disposed in the outer envelope for long-term adsorption of externally introduced gas. This segmentation allows each part to optimize its adsorption function without compromising the other.
Solution Approach 2:
The adsorbent is strategically placed in two different locations with different exposure levels to gas. The adsorbent in insertion holes performs partial adsorption of inside gas quickly, while the adsorbent in the outer envelope provides excessive adsorption capacity for long-term gas removal, ensuring both short-term and long-term performance.
2Reliability
If the adsorbent is packed in the non-porous sack and the porous hole is formed in the non-porous sack, then a degree of vacuum can be maintained, but a target gas does not exist around the adsorbent that exists in a portion where no porous hole is formed, such that adsorption of the gas is delayed and the adsorption performance cannot be exhibited in early stages
Solution Approach 1:
The adsorbent packaging is segmented into two regions: non-porous regions that maintain vacuum integrity and prevent gas ingress, and porous regions that enable rapid gas access to the adsorbent. This segmentation resolves the contradiction between vacuum maintenance and fast adsorption.
Solution Approach 2:
Different regions of the adsorbent packaging have different pore structures tailored to their specific functions. The non-porous regions provide gas barrier properties for vacuum maintenance, while the porous regions provide high gas permeability for rapid adsorption, creating local quality variations that optimize overall performance.
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
This configuration enhances both short-term and long-term insulation performance by ensuring efficient gas adsorption, reducing thermal conductivity issues, and preventing dew condensation in high-humidity environments.
Implementation Method 1
an adsorbent is disposed in the vacuum insulator and adsorbs the gas so that the degree of vacuum inside the vacuum insulator is maintained
Data Source
AI summary
In an insulator including an adsorbent configured to adsorb gas, an initial adsorption performance of the remaining gas inside the insulator using the adsorbent and a long-term adsorption performance of gas introduced into the insulator from the outside are improved so that the short-term performance and the long-term performance of the insulator can be simultaneously improved. An adsorbent that is a first part of an adsorbent included in a vacuum insulator is accommodated in a first space formed with an inside surface of a container, and an adsorbent that is a second part of the adsorbent is dispersed into a second space formed with an inside surface of an outer envelope and an outside surface of the container.