Panasonic vacuum insulated panels

Panasonic vacuum insulated panels Cellular freezer construction of vacuum panels and polyurethane foam provides structural stability and the highest insulation values required for extreme temperature differential between the ambient and interior chamber.
Vacuum insulation is designed to interfere with all of the heat transfer mechanisms.
Liquid or gaseous conduction occurs when a higher energy molecule collides with another and transfers some of its energy to the other molecule.
Conduction increases in importance with the number of molecules that are present and with increasing temperature or molecular energy.
Convection moves heat by permitting gases or liquids to flow from one location to another.
Home convection ovens use circulating hot air to bake foods quickly at a constant temperature.
It is used in building construction to provide better insulation performance than conventional insulation materials.
Haddad and her sweet wish to let her younger brother Saleh see snow for the first time in his life.
Use the Google Translate service at the top of the page to read articles written in languages other than your own.
Saleh and a group of kids from the nearby bdul Rahman Kanoo International School were waiting.
Particles of diamond and ground BINCHO charcoal are mixed with fluorine and used for inner container.
The Adobe Flash Player or an HTML5 supported browser is required for video playback.
You Search Images Maps Play YouTube News Gmail Drive Calendar More Translate Mobile Books Offers Wallet Shopping Blogger Finance Photos Videos Even more Hidden fields Account Options Sign in Advanced Patent Search Web History window.
Advanced Patent Search Patents A vacuum insulation panel comprising a defined dual layered enclosure encasing a defined compressed fiberglass substrate which enables easy and effective insulation of large equipment with improved system flexibility and integrity.
Also published as EP0263511A2 EP0263511A3 EP0263511B1 Inventors Arun Acharya Kenneth C.
External Links USPTO USPTO Assignment Espacenet Vacuum insulation panel US 4726974 A Abstract A vacuum insulation panel comprising a defined dual layered enclosure encasing a defined compressed fiberglass substrate which enables easy and effective insulation of large equipment with improved system flexibility and integrity.
The panel of claim 1 wherein the dual layered film has a thickness within the range of from 2 to 10 mils.
The panel of claim 1 wherein the film comprises two dual layered film sheets which are laminated together at the metal surfaces.
The panel of claim 1 wherein the shaped article is in the shape of a curved surface.
The panel of claim 1 wherein the shaped article has a density within the range of from 3 to 40 pounds per cubic foot.
The panel of claim 1 wherein the binder is present in the shaped article at a concentration within the range of from 5 to 30 weight percent.
The panel of claim 1 wherein the shaped article has curvilinear edging essentially completely around its perimeter.
The panel of claim 1 wherein the adsorbent is attached to the shaped article on the intended cold side of the panel.
The panel of claim 1 wherein the edges of the dual layered film enclosure are heat sealed together.
The panel of claim 1 additionally comprising two sided adhesive tape or velcro on the outside of the enclosure to facilitate attachment to equipment.
The use of claim 20 wherein the adsorbent is attached to the shaped article on the cold side of the panel.
The dual layered film enclosure comprises at least one layer of plastic and at least one layer of metal laminated together.
The plastic serves to provide flexibility to the enclosure and to provide facile sealing for the enclosure.
The thickness of the metal layer is within the range of from 100 to 2000 angstroms and preferably within the range of from 300 to 700 angstroms.
However the metal layer still provides an effective vapor barrier to the enclosure.
Such lamination is carried out employing conventional lamination techniques and adhesives which are well known to those skilled in the art.
The shaped article which is encased by the defined enclosure of this invention is comprised of compressed fiberglass.
The fiberglass fibers do not exceed ten microns in diameter and preferably do not exceed about five microns in diameter.
Preferably the fibers are aligned substantially longtudinally as this increases the strength and contributes to the surface smoothness of the shaped article and also reduces thermal conductivity.
The fiberglass is made into a shaped article which enables the panel to conform to the shape of the cryogenic equipment which is being insulated.
One very useful shape is a square or rectangular board which facilitates the use of the insulation panels of the invention to insulate a walled enclosure.
Another useful shape is a curved surface which facilitates the use of the insulation panels of the invention to insulate a cryogenic tank or other piece of equipment having a curved surface.
The binder serves to provide a smoothened surface on the shaped article and also serves to keep the individual fibers in place.
This reduces the chance of a fiber piercing the enclosure or entering the edge seal of the enclosure and thus enhances the integrity of the vacuum panel of this invention.
The shaped article of this invention preferably has curvilinear edging essentially completely around its perimeter.
This enables the vacuum panel to be easily placed into insulation service on a compatibly shaped piece of equipment and enables increased insulation efficiency.
This is heightened by the differential contraction of the fiberglass substrate and the dual layered film enclosure at cryogenic temperatures.
The curvilinear nature of the fiberglass substrate edging serves to mitigate this problem and thus further enhances the insulating integrity of the vacuum panels of this invention.
The adsorbent serves to adsorb gas or vapor which might permeate through the enclosure and thus serves to keep the vacuum within the enclosure from degrading excessively.
During storage at ambient conditions the sieve is not degraded by water vapor ingress due to its hydrophobic nature.
The vacuum insulation panel of this invention is assembled in any effective manner.
A particularly convenient means for attaching the panel to the equipment is by two sided adhesive tape or by velcro.
The vacuum panel of this invention is particularly well suited to insulate cryogenic equipment because its defined construction enables a high degree of insulation and a high degree of system integrity throuqh many thermal cycles between ambient and cryogenic temperatures.
TECHNICAL FIELD This invention relates generally to insulation panels and more specifically to insulation panels which can be employed to insulate cryogenic equipment such as a cold box of a cryogenic rectification plant.
Fiberglass boards within an evacuated or inert gas filled plastic enclosure are also known for use as insulation for large cryogenic equipment.
Such insulating means are disadvantageous due to the permeation of gases through the plastic enclosure and the tendency of the fiberglass to puncture the plastic enclosure.
It is therefore an object of this invention to provide an insulation panel for cryogenic equipment which can be easily applied to and removed from the equipment.
It is another object of this invention to provide an insulation panel for cryogenic equipment which provides high insulating capability while also having a high degree of flexibility and also having high system integrity.

Leave a Reply