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Method and device for determining the gas pressure in evacuated bodies

A vacuuming and vacuuming technology, which is applied in measuring devices, vacuum gauges that measure medium pressure by measuring the change of medium thermal conductivity, fluid tightness testing, etc., can solve the problem that metal disk measurement cannot be used, metal disk Can not be placed and other issues

Inactive Publication Date: 2009-08-26
VA Q TEC AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in the case of stacks of vacuum insulation panels, metal disks cannot be used for the measurement, since the metal disks cannot be placed on free-standing side edges

Method used

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  • Method and device for determining the gas pressure in evacuated bodies
  • Method and device for determining the gas pressure in evacuated bodies
  • Method and device for determining the gas pressure in evacuated bodies

Examples

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Embodiment Construction

[0028]To produce the evacuated object 1 in the form of a vacuum insulation panel, the bag 3 is produced from two high-barrier foils 2 with dimensions 250mm x 450mm placed one above the other in the following way, in that the two foils 2 are along the side Three of the edges 4 are each welded to each other by a sealing seam 5 . A dried core plate 7 made of microporous silicic acid with dimensions 200 mm×300 mm×20 mm is pushed into the bag 3 through the still open side 6 of the bag 3 . Due to the significantly shorter length of the core panel 7 compared to the bag 3 , after the core panel 7 has been completely pushed in, a wide free area 9 remains between the edge 8 of the core panel 7 and the opened bag edge 6 . A thin material layer, in particular a non-woven fabric 10 made of microglass fibers, is inserted into this region 9, that is to say overlaps the core plate 7 by at least approximately 10 mm to 20 mm on the one hand and is sealed on the other hand. Area 11 remains free...

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Abstract

The invention relates to a method and a system for using a thermal measuring method to determine the gas pressure in a vacuum element (1) or an evacuated body comprising sheathing and a lug (12) on the exterior, said lug being delimited by two film faces (2) that are interconnected in the region of the free edge of the lug. The claimed system is characterised both in that the chamber between the two film faces of the lug communicates with the chamber inside the sheathing of the vacuum element and is at least partially filled with an open-pored, thin material layer (10) and by a unit (14, 16) for measuring the gas-pressure dependent heat-transfer coefficient of the lug in the region of the material layer. The invention also relates to the operating method for said measuring device.

Description

technical field [0001] The invention relates to a method and a system for applying a thermal measurement method to determine the air pressure in an evacuated object or in a vacuum element, in particular with a foil-shaped envelope, on the outside of which a connecting piece is formed, the connection The sheet is delimited by two foil sides which are connected to one another in the region of the free edge of the connecting sheet. The object of the invention is in particular to measure the air pressure in a foil-enclosed vacuum insulation panel from the outside. [0002] A comprehensive, rapid and sufficiently precise determination of the gas pressure in the foil-wrapped vacuum insulation panel is an important prerequisite for a successful production control and quality assurance of the product. Various methods are known for testing the air pressure in vacuum insulation panels. The simplest is to observe the expansion of the envelope under reduced external air pressure in such...

Claims

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Application Information

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IPC IPC(8): G01M3/00
CPCG01M3/002G01L21/10G01N25/18
Inventor 罗兰·卡普斯
Owner VA Q TEC AG