Ovens and insulation products for ovens

Patent metadata

Field	Value
Publication number	US-10690355-B2
Application number	US-201715850624-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 21, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A device operates at high temperature, especially up to 550° C. and in particular between 50 and 350° C., such as an oven or an oven part. The device includes at least one insulating product formed of at least two layers, including a first layer, placed towards the heating zone and/or the heating element(s) to be insulated, formed of mineral wool(s) and/or fibre(s) and having a density of less than 120 kg/m 3 , and a second layer, further away, chosen from insulators formed of aerogel(s) or of amorphous silica or vacuum insulators or any other superinsulator. Additionally, an insulating product is appropriate for this device.

First claim

The invention claimed is:

1. A device configured to operate at high temperature, the device comprising:
a least one insulating product formed of at least two layers, including a first layer, placed towards a heating zone and/or a heating element(s) to be insulated, formed of mineral wool(s) and/or fibre(s) and having a density of less than 120 kg/m 3 , and a second layer, further away from said heating zone and/or said heating element than the first layer, the second layer being chosen from insulators formed of aerogel(s) or of amorphous silica or vacuum insulators or any other superinsulator, the second layer having a thermal conductivity of less than 22 mW/m.K at the temperature of 10° C.

2. The device according to claim 1 , wherein said insulating product is positioned so that the first layer is placed in direct contact with the said heating zone or at least one interlayer element or layer is inserted between the said heating zone or the said heating elements and the said first layer.

3. The device according to claim 1 , wherein said first layer exhibits a voluminal mass of less than 100 kg/m 3 ,a thickness of the first layer in addition being between 10 and 50 mm.

4. The device according to claim 1 , wherein said second layer exhibits a voluminal mass of between 100 and 350 kg/m 3 ,a thickness of the second layer in addition being between 3 and 30 mm.

5. The device according to claim 1 , wherein said insulating product comprises at least one third layer, the third layer being an interlayer layer between the first layer and the second layer and/or between the zone or element(s) to be insulated and the first layer and/or on the side of the second layer furthest from the zone and/or element(s) to be insulated.

6. The device as claimed in claim 1 , wherein the device is an oven or an oven part.

7. The device as claimed in claim 1 , wherein the high temperature at which the device operates is up to 550° C.

8. The device according to claim 2 , wherein said insulating product is positioned so that the first layer is placed in direct contact with a wall or with a casing or with a muffle delimiting said heating zone.

9. The device according to claim 5 , wherein said third layer is a layer with an emissivity of less than 0.4 for wavelengths from 5 to 50 μm.

10. The device according to claim 9 , wherein said third layer is a layer of aluminum.

11. The device according to claim 1 , wherein said second layer is a vacuum insulator formed of one or more cores including a porous material and surrounded by a casing that maintains a vacuum pressure of less than 0 . 5 mbar within the one or more cores.

12. An insulating product, said product comprising:
at least two layers, including a first layer to be placed towards a heating zone and/or a heating element(s) to be insulated, formed of mineral wool(s) and/or fibre(s) and having a density of less than 120 kg/m 3 , and a second layer, further away from said heating zone and/or said heating element than the first layer, chosen from insulators formed of aerogel(s) or of amorphous silica or vacuum insulators or any other superinsulator, the second layer having a thermal conductivity of less than 22 mW/m.K at the temperature of 10° C.

13. The insulating product according to claim 12 , wherein an equivalent thermal resistance R eq of the insulating product is greater than 1.2 m 2 ·K/W.

14. The insulating product according to claim 12 , wherein a content of organic components present in said product is less than 20% by weight of said product.

15. The insulating product according to claim 12 , wherein the insulating product is a high-temperature insulation of a device subjected to temperatures of up to 550° C.

16. The insulating product according to claim 12 , wherein said second layer is a vacuum insulator formed of one or more cores including a porous material and surrounded by a casing that maintains a vacuum pressure of less than 0.5 mbar within the one or more cores.

17. The device according to Claim 1 , wherein said second layer is an insulator formed of amorphous silica.

18. The device according to Claim 17 , wherein the amorphous silica is fumed silica powder within a fibrous layer.

19. The device according to Claim 18 , wherein the fibrous layer is in the form of two fabrics of fibres sown so as to form cells intended to contain the fumed silica powder.

20. The insulating product according to Claim 12 , wherein said second layer is an insulator formed of amorphous silica.

21. The insulating product according to Claim 20 , wherein the amorphous silica is fumed silica powder within a fibrous layer.

22. The insulating product according to Claim 21 , wherein the fibrous layer is in the form of two fabrics of fibres sown so as to form cells intended to contain the fumed silica powder.

Assignees

• Saint Gobain Isover

Inventors

• Bareyt Christophe
• Gogeon David

Classifications

• F27D1/0009 Primary

  Comprising ceramic fibre elements · CPC title

• F27D1/0013

  the fibre elements being in the form of a folded blanket or a juxtaposition of folded blankets · CPC title

• F27D1/0016

  Interleaved multiple folded blankets · CPC title

• B32B2571/00

  Protective equipment · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title