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Method and device for determining the gas pressure in evacuated bodies

A technology for vacuuming and objects, which is applied in measuring devices, vacuum gauges that measure medium pressure by measuring changes in 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: 2013-07-17
VA Q TEC AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Experimental program
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Embodiment Construction

[0028]To manufacture the evacuated object 1 in the form of a vacuum insulation panel, a bag 3 is manufactured from two high-barrier foils 2 with dimensions 250 mm x 450 mm placed one on top of the other in the following way, by means of the two foils 2 along the side Three of the edges 4 are each welded to each other by a seam 5 . A dried core 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 relative to the bag 3, a wide free area 9 remains between the edge 8 of the core panel 7 and the open bag edge 6 after the core panel 7 has been fully inserted. A thin layer of material, in particular a nonwoven 10 made of microglass fibers, is inserted into this region 9 , that is to say, on the one hand, overlaps the core 7 by at least about 10 mm to 20 mm and on the other hand is sealed The area 11 remains free at the pocket opening 6 ....

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Abstract

The invention is directed to a method and a system for using a thermal measurement method to determine the gas pressure in a vacuum element or in an evacuated body having an envelope and comprising on its exterior a flap delimited by two film faces that are joined together in the region of the free edge of the flap; the system according to the invention is characterized, on the one hand, by the fact that the space between the two film faces of the flap communicates with the space inside the envelope of the vacuum element and is at least partially filled with an open-pored, thin material layer, and, on the other hand, by a device for measuring the gas-pressure-dependent heat exchange coefficient of the flap at the location of the material layer; the invention also relates to the manner of operation of this 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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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/00
CPCG01M3/002G01L21/10G01N25/18
Inventor 罗兰·卡普斯
Owner VA Q TEC AG