CN2046580U - Multi-layer heat-insulating structure with gaps - Google Patents
Multi-layer heat-insulating structure with gaps Download PDFInfo
- Publication number
- CN2046580U CN2046580U CN 89203332 CN89203332U CN2046580U CN 2046580 U CN2046580 U CN 2046580U CN 89203332 CN89203332 CN 89203332 CN 89203332 U CN89203332 U CN 89203332U CN 2046580 U CN2046580 U CN 2046580U
- Authority
- CN
- China
- Prior art keywords
- gaps
- layer heat
- heat insulation
- radiation
- insulating structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- Thermal Insulation (AREA)
Abstract
The utility model discloses a multi-layer heat-insulating structure with gaps which is composed of an alternate congruence of radiation screens and interval materials. The radiation screen is provided with many gaps (the area of aperture is zero), a gap rate is below 0.03 and the length of the gaps is 60-80 mm. The utility model has the obvious effects of energy conservation and solves the defects that multilayer heat insulation is difficultly evacuated because of so many layers and round holes increase radiant heat flux.
Description
The utility model belongs to multiple layer heat insulation structure.
By numerous radiation screens and the interval insulant vacuum multi-layer insulation that forms that is superimposed is a kind of high performance thermal insulation, obtains to use widely in Cryo Heat Insulation.Radiation screen generally adopts aluminium foil, and aluminium plating terylene film, interval insulant generally adopt glass fiber cloth, nylon.Multilayer heat insulation is highly effective to the room temperature radiation that reduces from hot wall.But obtaining good heat-insulating property interlayer gas pressure intensity should be less than 1 * 10
-Pa.In actual applications, because the narrow annular channel admittance ability between the numerous heat insulation layers that twine is very little, when finding time, the actual pressure of internal layer gas is far above the outer field apparent pressure of insulation chambers, and in order to change above-mentioned condition, people have adopted several different methods.For example adopt heating and CO
2The technology of finding time of displacement adopts carburizing paper as interval insulant, and employing perforate on radiation screen reduces the resistance etc. of exitting.But, heating and repeatedly replace CO
2May compress multilayer heat insulation and influence its heat-insulating property; Employing carburizing paper has increased cost and has very easily made moist; On heat screen, hold aperture in a large number the emissivity of heat screen is increased, and may reduce effective radiating area Enhanced Radiation Reduced Blast hot-fluid, influence heat-insulating property.
The purpose of this utility model provides a kind of chink type multiple layer heat insulation structure.
Accompanying drawing is a chink type multiple layer heat insulation structure schematic representation, and radiation screen 1 among the figure; Interval insulant 2; Slit 3.
Feature of the present utility model is, has numerous slit (perforated area is zero) at the radiation shield of multiple layer heat insulation structure, and the rate of cracking is below 0.03, and seam is long to be 60-80mm. When the radiant heat flux of extraneous thermal source enters slit with full solid angle, absorbed or reflection by the edge of plurality of thermal insulation layers, because diffuse reflection, the hot-fluid that is reflected by cold surface still distributes in all directions, enter next slit, the again radiation between multilayer is so that the energy increase of its absorption again. Because the increase of hot-fluid is the function of breach aspect ratio on the black chamber effect unit breach area, heat flow value increases very soon with slit width. But black chamber effect disappears when slit width goes to zero, and therefore, width is that zero slit does not increase radiant heat flux.
Employing the utlity model has remarkable energy saving effect, both can solve the problem that it is difficult that the multilayer heat insulation number of plies is found time for a long time, can not resemble again radiant heat flux to be increased the Kai Yuan hole.
Claims (2)
1, a kind of chink type multiple layer heat insulation structure, it is to penetrate screen and interval insulant is superimposed and forms by the width of cloth, it is characterized in that having on said radiation screen numerous slit (perforated area is zero).
2, a kind of chink type multiple layer heat insulation structure according to claim 1 is characterized in that the said slit rate of cracking is below 0.03, and seam is long to be 60-80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89203332 CN2046580U (en) | 1989-03-23 | 1989-03-23 | Multi-layer heat-insulating structure with gaps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89203332 CN2046580U (en) | 1989-03-23 | 1989-03-23 | Multi-layer heat-insulating structure with gaps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2046580U true CN2046580U (en) | 1989-10-25 |
Family
ID=4860903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89203332 Withdrawn CN2046580U (en) | 1989-03-23 | 1989-03-23 | Multi-layer heat-insulating structure with gaps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2046580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237377A (en) * | 2018-01-15 | 2018-07-03 | 北京市朝阳区长安机电技术研究所 | Infrared cooling liquid nitrogen metal Dewar bottle production technology |
| CN108444150A (en) * | 2018-05-07 | 2018-08-24 | 中国科学院理化技术研究所 | A kind of compound hollow out protective shield of radiation |
-
1989
- 1989-03-23 CN CN 89203332 patent/CN2046580U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237377A (en) * | 2018-01-15 | 2018-07-03 | 北京市朝阳区长安机电技术研究所 | Infrared cooling liquid nitrogen metal Dewar bottle production technology |
| CN108444150A (en) * | 2018-05-07 | 2018-08-24 | 中国科学院理化技术研究所 | A kind of compound hollow out protective shield of radiation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |