Vacuum insulation body
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Solution Overview
Problem
Vacuum insulation bodies used in refrigerators and freezers are sensitive to increases in gas pressure, which enhance thermal conductivity, and existing methods for evacuating these systems are inefficient and costly due to high apparatus expenditure and limited gas flow through core materials.
Innovation Solution
The adsorbent material, such as zeolites or getters, is arranged in the region of the opening of the vacuum insulation body to facilitate efficient gas removal during evacuation, and a flow distributor formed by adsorbent material increases the effective flow cross-section, minimizing the evacuation time and pressure-dependent flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adsorbent material is placed in the vacuum region away from the opening, then it can effectively adsorb gas particles, but the evacuation process becomes inefficient due to long gas flow paths and high pressure-dependent resistance
Solution Approach 1:
The adsorbent material is pre-positioned in the region of the opening before evacuation, creating a favorable position for gas particle removal. This preliminary arrangement ensures that the adsorbent is already in optimal location to capture gas particles as they reach the opening, eliminating the need for long-distance diffusion through the core material.
Solution Approach 2:
The adsorbent material is specifically positioned in the region of the opening where gas particles naturally concentrate during evacuation. This localized placement creates a high-efficiency zone for gas capture exactly where it is most needed, rather than distributing the adsorbent uniformly throughout the vacuum region.
2Reliability
If a vacuum chamber is used for vacuum generation, then complete vacuum can be achieved, but the apparatus expenditure becomes comparatively high
Solution Approach 1:
The invention extracts the essential vacuum generation function from the complex vacuum chamber system and implements it through a simplified evacuation port configuration with strategically positioned adsorbent material. This removes the need for expensive vacuum chamber infrastructure while maintaining effective vacuum generation through the simplified port-based approach.
Solution Approach 2:
The solution replaces expensive, complex vacuum chamber equipment with a simpler, more economical evacuation port system. The adsorbent material arranged at the opening provides sufficient vacuum generation for the application without requiring investment in costly vacuum chamber infrastructure.
3Quantity of substance
If the adsorbent material is arranged throughout the vacuum region, then gas adsorption capacity is maximized, but the flow cross-section for gas removal is reduced
Solution Approach 1:
Instead of distributing adsorbent material uniformly throughout the vacuum region, the invention concentrates it specifically in the region of the opening. This localized placement maintains adequate flow cross-section for gas removal while providing sufficient adsorption capacity at the critical location where gas particles accumulate during evacuation.
Solution Approach 2:
The invention uses partial placement of adsorbent material - specifically at the opening region rather than throughout the entire vacuum region. This partial action is sufficient to achieve effective vacuum generation without the excessive material distribution that would block gas flow paths.
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 allows for efficient and cost-effective vacuum generation by minimizing gas flow paths and pressure-dependent resistance, maintaining low gas pressure within the vacuum region, even after evacuation, thereby enhancing the thermal insulation effectiveness.
Implementation Method 1
a material with a high adsorption capacity for water into the vacuum region, in order to keep the partial pressure in the vacuum region low even in the case of penetrating steam
Implementation Method 2
materials are known which by chemisorption of oxygen and nitrogen keep their partial pressure low. These materials are designated as 'getters'
Implementation Method 3
these gas particles must diffuse to the evacuation port
Implementation Method 4
a flow distributor which is formed such that it increases the effective flow cross-section during evacuation
Data Source
AI summary
A vacuum insulation body includes at least one vacuum-tight casing and at least one vacuum region surrounded by the casing. The casing is provided with at least one opening, in particular with at least one evacuation port, for evacuating the vacuum region. At least one adsorbent material is present in the vacuum insulation body. The adsorbent material is partly or completely arranged in the region of the opening.