EP2935673B1 - Mineral wool insulation - Google Patents
Mineral wool insulation Download PDFInfo
- Publication number
- EP2935673B1 EP2935673B1 EP13811961.5A EP13811961A EP2935673B1 EP 2935673 B1 EP2935673 B1 EP 2935673B1 EP 13811961 A EP13811961 A EP 13811961A EP 2935673 B1 EP2935673 B1 EP 2935673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mineral wool
- wool insulation
- household appliance
- bands
- accordance
- 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.)
- Not-in-force
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/34—Elements and arrangements for heat storage or insulation
Definitions
- the present invention relates to a mineral wool insulation panel for thermal and/or acoustic insulation of household appliances, for example electrical appliances, particularly ovens.
- Heat generating household appliances or heat requiring household appliances commonly comprise double walls defining a space between them which is generally filled with insulation material.
- Mineral wool is often a preferred insulation material for such applications thanks to its thermal insulation properties, its resistance to relatively high temperature exposure and its good fire resistance. Any organic binders used in the mineral wool product tend to decompose when first subjected to high temperatures and to generate unpleasant or undesired gas emissions; consequently the insulation mineral fibre material for such applications preferably contains only low levels of organic binders and, more preferable, does not include any organic binders.
- the insulation material is intended to: reduce loss of energy to the surroundings, thus reducing energy consumption of the appliance; and/or shield elements of the relevant appliances, for example wiring and electrical motors, and/or adjacent spaces or furniture from high temperature exposure; and/or reduce noise emission.
- the insulation material in the form of a pre-cut mat of mineral wool and to apply such pre-cut mat around the appliance by folding it along an edge of the relevant appliance, around at least two sides of the appliance, preferably three or four or even five sides thereof, the front side generally being provided with a door and control means.
- homogenous fibre mats have been used to insulate such domestic appliances.
- Different sides of an oven may require different levels of thermal insulation.
- the upper face of an oven may require a higher level of thermal insulation than the lateral sides.
- the bottom side may require yet a different level of thermal insulation, depending on the presence or absence of heating elements and other characteristics. Increasing the thickness of the insulation material all over is not desirable as that is likely to increase the outer dimensions of the oven (which would be particularly problematic for fitted ovens) or to reduce the inner dimensions of the oven (which would reduce the usable volume inside the oven).
- the present invention provides a unitary household appliance mineral wool insulation panel as defined in claim 1.
- Other aspects are defined in the other independent claims.
- the dependent claims define preferred and/or alternative embodiments.
- a unitary panel that is to say a panel which is a continuous extension which can be handled and manipulated as a single unit (as opposed to a collection of two or more freely separable individual pieces of mineral wool) facilitates assembly of the panel as part of an appliance.
- a unitary panel that is to say a panel which is a continuous extension which can be handled and manipulated as a single unit (as opposed to a collection of two or more freely separable individual pieces of mineral wool) facilitates assembly of the panel as part of an appliance.
- thermal insulation performance of a mineral wool insulation panel depends, inter alia, upon the panel's thickness and density.
- thermal resistance will increase with density up to a certain optimum; further increase of density then leads to excess contact between individual fibres and hence to reduced insulation characteristics, and reduced performance of the insulation material. Insulation performance will thus depend on the balance between thickness and density.
- the at least two bands of the insulation mat may be substantially parallel; all of the bands may be parallel.
- the bands may be adjacent; they may be arranged across the width of the insulation mat or panel, for example so that the width of the mat or panel is made up of the sum of the widths of each band.
- the density and/or orientation of the mineral wool fibres may be non-homogeneous across the thickness of a part of or the entire mineral wool panel.
- the mineral wool may have a greater density, notably a density that may be greater by at least 10 kg/m 3 than at the other surface of the mineral wool panel.
- the mineral wool fibres may generally lie substantially parallel to the surface of the panel whilst at the other face of the panel the mineral wool fibres may lie substantially perpendicular to the surface of the panel.
- Part or all of one, more than one or all bands of the mineral wool panel may have such configurations.
- the unitary mineral wool insulation panel may be used to cover at least two sides of a household appliance, each band of the mat corresponding to a side of the household appliance; this may provide a differential in the thermal resistance or insulating power of the mat at at least two sides of the appliance and thus facilitate optimisation of insulation and useable inner space for the appliance.
- a unitary mineral wool insulation panel may cover two or more sides of the oven with different insulation requirements on each side, thereby liberating an optimum space inside the oven. Different insulation characteristics may be obtained by varying the thickness and/or the density on the relevant parts of the panel that insulates the relevant sides of the oven.
- the unitary insulation panel may have a first band having a width corresponding to the height of an appliance it is intended to insulate, and a second band having a width corresponding to the width of the appliance, and a length corresponding to the depth of the appliance; such an insulation panel may be arranged to cover one lateral side and a bottom side or a lateral side and the top side of the appliance, e.g. a household oven.
- the unitary insulation panel may have one band having a width corresponding to the height of the appliance, a second band having a width corresponding to the width of the appliance and a third band having a width corresponding to the height of the device, and a length corresponding to the depth of the appliance; such an insulation panel may be arranged to cover and insulate one lateral side and the bottom or top side and the other lateral side of the appliance, e.g. an oven. The remaining faces of an oven may then be covered by an element cut out of a two band panel such as to cover the top or bottom side and the back side of the appliance.
- the density and thickness of the insulation panel and/or of one or more bands of the insulation panel may be obtained by needling. Needling is a process in which a plurality of needles are punched in and out of the mineral wool insulation mat thus leading to a rearrangement of the fibres in the mat and generally to an increase of fibre density concomitant with a reduction in thickness. Needling of different bands may be performed with different numbers of needles per surface area, with different types of needles, from the bottom and/or the top in order to obtain the effect sought. At least one of the bands may have areas of different densities obtained by differential needling of the mineral wool insulation. Needling of the insulation mat is preferably carried out on line, for example prior to cutting the panel from the mineral wool blanket.
- needling may be carried out off-line.
- a lubricant typically an oil, may be provided at the mineral wool to facilitate needling; where this is the case, any such organic lubricant or oil is preferably removed subsequent to needling, for example by heating and/or decomposition.
- the insulation panel may comprise at least three adjacent bands, each band having dimensions corresponding to adjacent sides of a household appliance.
- the insulation panel may be folded around the appliance, for example folded at about 90° around one at least of edge of the appliance.
- the difference in the weighted thickness between different bands may be at least 5 mm, at least 8mm or at least 10 mm; it may be no more than 30 mm or no more than 25mm.
- the difference in weighted density between different bands may be at least 10 kg/m 3 , at 20 kg/m 3 or at least 30 kg/m 3 ; it may be not more than 60 kg/m 3 , not more than 50 kg/m 3 or not more than 40 kg/m 3 .
- the insulation mat or panel may comprise between two and six bands, notably two, three or four bands.
- each band is at least 20 cm and may be at least 40 cm, at least 50 cm or at least 60 cm; it may be no more than 150 cm, no more than 120 cm or no more than 100 cm.
- the length of the mineral wool panel may be at least 40 cm, at least 50 cm or at least 60 cm; it may be no more than 150 cm, no more than 120 cm or no more than 100 cm.
- the width of the mineral panel may be at least 80 cm, at least 100 cm or at least 120 cm; it may be no more than 300 cm, no more than 280 cm or no more than 260 cm.
- the length of the mineral wool panel may correspond to the depth of the appliance it is intended to insulate.
- the mineral wool insulation panel may comprise less than 6% by weight of an organic binder, preferably less than 4% by weight and more preferably less than 2% by weight as determined by loss on ignition (LOI).
- the mineral wool insulation panel may comprises less that 0.5% by weight binder or more preferable is free of or at least substantially free of organic binder. This reduces undesired off gassing of the mineral wool upon first heating.
- the insulation panel may comprise cut outs; these may be convenient for the arrangement of cable ducts or tubing, such as water connections or similar, or for the arrangement of electrical fans or other equipment elements. Further cut outs or notches may be provided to facilitate connection of two adjacent insulation panels. Yet further cut outs or notches may be provided in order to adapt the insulation panel to the design requirements of the household appliance it is intended to insulate.
- Fig. 1 illustrates a mineral fibre insulation panel 10 having a width w and a length I and adapted to cover three sides of a household oven, more particularly the top and two lateral sides of the oven. It thus comprises three bands, 3, 5 and 7.
- a mineral fibre insulation panel adapted to cover the back side and the bottom side of the oven may be similar to that represented in Figure 2 .
- the sixth side of the oven comprises an oven door, for example a full side glass door.
- the three bands 3, 5 and 7 are arranged across the width of the mineral fibre insulation panel 10.
- the first band 3 is arranged at one side edge of the insulation panel 10
- the second band 5 is arranged next to the first band across the width of the insulation panel 10 with respect to the first band 3
- the third band 7 is arranged next to the second band 5 further across the width of the insulation panel 10.
- the central band 5 of the three band panel 10 is intended to cover the top side of the oven and has a greater thickness than the peripheral bands 3, 7 which are intended to cover the lateral sides of the oven.
- An insulation panel 10 as shown in Fig 1 may be cut from a continuous mineral wool blanket having three bands 3, 5 and 7 of different thickness and/or density.
- each band of the insulation panel 10 may be modulated as follows.
- a primary insulation wool blanket 42 is provided having a substantially uniform weight per unit area across its width w.
- the primary insulation wool blanket 42 may be deposited using a pendulum (not shown) which distributes a blanket of mineral wool across the width of an advancing conveyor belt 43; this may be used to facilitate provision of a blanket having substantially uniform weight per unit area across its width w and/or influence orientation of fibres in the blanket.
- the primary insulation wool blanket 42 passes through a series of compression rollers 44 which reduce its thickness and increase its density prior to stripping off of a top layer 48 of the blanket using a horizontal knife blade 45 extending over the whole width w of the blanket 41.
- the last compresson roller 46 in the series of compression rollers 44 when seen in the direction in which the blanket 42 advances along the production line, comprises three coaxial portions 461, 462, 463.
- the second (in this case central) coaxial portion 462 has a radius which is greater that the radius of the first and third (in this case peripheral) coaxial portions 461, 463. Consequently, when the primary blanket 42 is compressed between this compression roller 46 and the conveyer belt 43, a central band across the width of the primary blanket is compressed more than the peripheral bands. After removal of the top layer 48 of the blanket in its compressed state, this central band thus expands more than the peripheral bands thus creating a secondary blanket 49 having a central band 492 that has a greater thickness than the peripheral bands 491,493.
- each band is created by an individual roller 471, 472, 473 whose height with respect to the conveyer 43 may be individually adjusted.
- the blanket 49 passes through an on-line needling station 47 at which it is needled preferably from above and below to rearrange the orientation of some of the fibres in the blanket and provide integrity to the blanket. Needling generally results in an increase in density and a decrease in thickness.
- the configuration of the needling e.g. types of needles and/or density of needles
- the blanket passes through an oven to decompose and remove any lubricating needling oil that has been used.
- a panel 10 is then die cut from the secondary blanket 49. Die cutting provides the outer peripheral edge 11 of the panel 10 and may also provide cut-outs 12,13, for example for arranging tubing or cable duct, and/or notches 14,15 adapted to the design of the domestic appliance which the panel 10 is intended to insulate and/or adapted to facilitate assembly of two adjacent panels.
- Figure 2 illustrates a two band panel 20.
- a first band 21 of the two band panel 20 corresponds in its dimension to and is intended to insulate the bottom side of a household oven; a second band 22 of the two band panel 20 corresponds in its dimension to and is intended to insulate the back side of the oven.
- the first 21 and second 22 bands of this two band panel 20 have different thickness and/or densities; this facilitates optimisation of the panel for a particular oven.
- the possible presence of one or more embossing 23 and/or protrusion 24 of the mineral wool at one or more bands is illustrated in Figs 2a , 2b and 2c . These may be created by providing corresponding protrusions and/or embossing (not shown) at the compression roller 46.
- ovens Whilst the invention relates particularly to ovens, more particularly household or domestic ovens including gas oven and electric ovens, it may also find application in other appliances, including dish washers, steam cookers and storage heaters.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13811961T PL2935673T3 (pl) | 2012-12-24 | 2013-12-19 | Izolacja z wełny mineralnej |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB1223352.4A GB201223352D0 (en) | 2012-12-24 | 2012-12-24 | Mineral wool insulation |
PCT/EP2013/077551 WO2014102158A1 (en) | 2012-12-24 | 2013-12-19 | Mineral wool insulation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2935673A1 EP2935673A1 (en) | 2015-10-28 |
EP2935673B1 true EP2935673B1 (en) | 2016-11-16 |
Family
ID=47682561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13811961.5A Not-in-force EP2935673B1 (en) | 2012-12-24 | 2013-12-19 | Mineral wool insulation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2935673B1 (pl) |
GB (1) | GB201223352D0 (pl) |
PL (1) | PL2935673T3 (pl) |
WO (1) | WO2014102158A1 (pl) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10989417B2 (en) | 2016-01-27 | 2021-04-27 | Owens Corning Intellectual Capital, Llc | Thermal appliance |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2145003A5 (en) * | 1971-07-06 | 1973-02-16 | Ofic | Insulating mineral wool resin panels - with alternate layers of high and low density |
DK3693D0 (da) * | 1993-01-14 | 1993-01-14 | Rockwool Int | A method of producing a mineral fiber-insulating web, a plant for producing a mineral fiber web, and a mineral fiber-insulated plate |
US5462642A (en) * | 1993-09-16 | 1995-10-31 | Kajander; Richard E. | Method of forming a fibrous mat |
GB9701500D0 (en) * | 1997-01-24 | 1997-03-12 | Bpb Plc | Non-woven inorganic fibre mat |
US5865003A (en) * | 1997-09-05 | 1999-02-02 | Owens Corning Fiberglas Technology, Inc. | Reinforced glass fiber mat and methods of forming |
US6319455B1 (en) * | 1999-08-13 | 2001-11-20 | First Quality Nonwovens, Inc. | Nonwoven fabric with high CD elongation and method of making same |
-
2012
- 2012-12-24 GB GBGB1223352.4A patent/GB201223352D0/en not_active Ceased
-
2013
- 2013-12-19 WO PCT/EP2013/077551 patent/WO2014102158A1/en active Application Filing
- 2013-12-19 EP EP13811961.5A patent/EP2935673B1/en not_active Not-in-force
- 2013-12-19 PL PL13811961T patent/PL2935673T3/pl unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2935673A1 (en) | 2015-10-28 |
GB201223352D0 (en) | 2013-02-06 |
WO2014102158A1 (en) | 2014-07-03 |
PL2935673T3 (pl) | 2017-07-31 |
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