Vacuum Insulation Panel Sealing with Powder Filter
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Solution Overview
Problem
Existing methods for producing vacuum insulating bodies (VIPs) face challenges in preventing contamination of sealing seams by powder-like filling materials during the evacuation process, leading to potential dust leakage and unsound sealing.
Innovation Solution
A method involving a vacuum-tight film and a flat filter material that is impermeable to powder, where the filter is connected to the film in a way that prevents powder leakage, allowing filling under high pressure and subsequent vacuum sealing to ensure a dust-tight closure, using a filling element and self-sealing filter materials to maintain integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If powder is filled into the bag under gravitational force via a filling tube, then the filling process is simple, but contamination of sealing areas with powder occurs leading to unsound sealing
Solution Approach 1:
The patent applies preliminary action by pre-attaching the filter material to the bag opening before the filling process. This filter material serves as a preventive measure that stops powder particles from reaching the sealing areas before contamination can occur, thus maintaining sealing quality while keeping the filling process simple
Solution Approach 2:
The filter material acts as an intermediary element between the filling tube and the sealing areas. It allows the filling process to proceed smoothly while blocking powder particles, thus mediating between the need for simple filling and the requirement for contamination-free sealing
2Reliability
If a filter material is attached to prevent powder contamination, then sealing quality improves, but the production process requires greater effort and cannot be completely automated
Solution Approach 1:
The filter material is pre-attached to the bag opening in a simple manner before filling, which maintains high sealing quality while avoiding complex production steps. The preliminary attachment is designed to be straightforward and compatible with automated processes
Solution Approach 2:
The filter material is designed to be self-retaining through its attachment to the bag opening, eliminating the need for additional complex securing mechanisms or manual adjustments during the filling process, thus reducing overall production complexity
3Productivity
If the filling tube is withdrawn after filling, then the filling process is complete, but powder contamination of sealing areas occurs
Solution Approach 1:
The filter material serves as a permanent intermediary that remains in place during and after filling. It allows the filling tube to be withdrawn efficiently while continuously blocking powder particles from reaching the sealing areas, thus maintaining both productivity and manufacturing precision
Solution Approach 2:
The filter material is pre-positioned to protect sealing areas before any filling occurs. This preliminary protection ensures that when the filling tube is withdrawn, no powder contamination can occur, maintaining sealing area cleanliness without compromising filling efficiency
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 method effectively prevents powder contamination during the sealing process, ensuring a completely dust-tight and air-tight vacuum insulation panel with reduced thermal conductivity and extended gas pressure stability.
Implementation Method 1
a flat filter material that is permeable to air but not permeable to a powder-like filling material
Implementation Method 2
The composite comprising the film or film connection and the flat filter material and also the filling material located in the receiving space as a whole is brought to a pressure that is considerably lower than the ambient pressure
Implementation Method 3
a desired amount of powder-like filling material is filled into the receiving space through the filling element, preferably under a filling pressure that is higher than the ambient pressure
Implementation Method 4
the vacuum-tight film or film connection is firmly sealed completely around the edges in such a way that this connecting edge is not permeable to air, and thus the receiving space as a whole is sealed in an air-tight manner
Data Source
AI summary
A method is for producing a vacuum insulating body (vacuum insulation panel; VIP) made of a vacuum-tight foil or foil connection and a flat filter material, in particular a single-layer or multi-layer non-woven material, which is air-permeable but is not permeable for a powdered filling material.