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WO2013083474A1 - Porte d'appareil ménager de traitement thermique - Google Patents

Porte d'appareil ménager de traitement thermique Download PDF

Info

Publication number
WO2013083474A1
WO2013083474A1 PCT/EP2012/073964 EP2012073964W WO2013083474A1 WO 2013083474 A1 WO2013083474 A1 WO 2013083474A1 EP 2012073964 W EP2012073964 W EP 2012073964W WO 2013083474 A1 WO2013083474 A1 WO 2013083474A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
airgel
disc
heat treatment
oven
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.)
Ceased
Application number
PCT/EP2012/073964
Other languages
German (de)
English (en)
Inventor
Jochen Herbolsheimer
Robert KÜHN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to EP12791784.7A priority Critical patent/EP2788687A1/fr
Publication of WO2013083474A1 publication Critical patent/WO2013083474A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
    • 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 invention relates to a door for a household heat treatment apparatus, wherein the door has a viewing window.
  • the invention further relates to a household heat treatment device with a door equipped with a viewing window.
  • ovens oven doors which have a viewing window.
  • the viewing window may have a disc package, which has an adjacent to a heat treatment chamber inner pane, an outer side outer pane and a between see the inner pane and the outer pane disposed intermediate disc.
  • a disk package substantially reduces a temperature at the outer disk compared to a single disk or to a disk package with only one inner disk and one outer disk.
  • the temperature on the outer pane during prolonged operation of the oven, especially in a pyrolysis operation rise to an undesirably high value.
  • ventilated oven doors are known which can produce a cooling air flow in the disk pack.
  • the ventilation may be passive by heat convection and e.g.
  • Venturi effect can be performed or active by means of a fan.
  • the aeration heat dissipation may also be increased from a cooking chamber closed by the oven door, so that an energy balance is deteriorated.
  • WO 2010/080060 A1 discloses an energy-saving window which has a transparent sheathing which encloses a transparent plate of silica airgel. After evacuation, a thermal conductivity at room temperature of a few mW / (mK) is achieved.
  • This energy-saving window is intended for buildings and consequently for room temperature applications. It is the object of the present invention to at least partially overcome the disadvantages of the prior art, and in particular to provide an improved possibility for thermal insulation of a viewing window of a door for a household heat treatment device. This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.
  • the object is achieved by a door for a household heat treatment device, wherein the door has a viewing window and wherein the viewing window has at least one airgel disc (or plate) made of a translucent airgel.
  • the door is typically provided to close a heat treatment room of the household heat treatment apparatus, the viewing window allowing a view into the heat treatment room.
  • the heat treatment room is heatable for the treatment of objects housed in it.
  • the at least one airgel disc Due to the at least one airgel disc, which in each case has a very low thermal conductivity of only between 0.014 and 0.05 W / (m-K), a heat flow from the heat treatment space to the outside area can be considerably reduced.
  • a very steep temperature gradient may occur at the airgel disk, so that a surface temperature on the inside (facing the heat treatment chamber) of the airgel disk is high, which results in heat removal from the heat treatment space (eg by air cooling and heat treatment) / or thermal radiation) low, but a surface temperature on the (the heat treatment space facing away) outside is very low, so that a high contact safety is possible here.
  • a waiver of door ventilation is made possible, which in turn creates new space and thus allows more design freedom.
  • the door can thus be an unventilated door in a development, even for pyrolysis.
  • at least one conventional glass pane can be replaced by the at least one airgel pane, which results in considerable weight savings.
  • a further advantage of the airgel disc is that its melting point is so high (in the case of silica airgel, for example, at about 1200 ° C) that it occurs at temperatures that occur in household appliances (up to 500 ° C in a cooking chamber an oven during a pyrolysis operation), neither melt nor deform appreciably elastically or plastically.
  • the airgel disc is non-flammable and non-toxic. It is an embodiment that the at least one airgel disc is transparent or practically transparent (quasi-transparent).
  • translucent material haze caused by moisture is typically reversible by heating the airgel disc to a temperature above 100 ° C.
  • this is not mandatory, and the airgel disc may only be translucent. This may be sufficient, for example, in household heat treatment appliances which do not require monitoring or evaluation of the object heat-treated in the heat treatment room, for example so-called sterilizers.
  • the viewing window has a disc package, which has an adjacent to a heat treatment chamber inner pane, an outside outer pane (windshield) and at least one spaced between the inner pane and the outer pane intermediate disc, and that at least one intermediate disc of at least one airgel Washer is constructed.
  • the airgel disk can be protected by means of the outer disk and the inner disk, in particular against mechanical stress and contamination by liquid, dust, vapors, etc.
  • all intermediate disks can be made of aerosol.
  • at least one disc may be made of a different material than airgel, e.g. made of borosilicate.
  • the disc package has an intermediate disc, which is constructed from at least two superimposed, individually produced airgel discs.
  • an intermediate disc which is constructed from at least two superimposed, individually produced airgel discs.
  • Such a washer has the advantage that it is comparatively easy and inexpensive to produce, because thin airgel discs are much faster to produce than thick airgel discs.
  • a single-piece airgel disc (or airgel plate) has a thickness between about 5 mm to 40 mm, preferably between about 10 mm and 20 mm, more preferably between about 12 mm and 16 mm , Such plates are relatively easy to produce and handle.
  • the intermediate disc is separated at least with respect to the inner pane by a gap.
  • This gap improves a heat insulation further, since such a direct heat conduction is prevented by a contact between the inner pane and the washer and a heat transfer can only be generated by radiant heat and by a gas movement or convection in the gap.
  • the gap not more than 4 mm, in particular not more than 2 mm, in particular not more than about 1 mm, measures. It is an advantageous for avoiding unwanted contacting development that the gap is at least 0, 1 mm wide.
  • At least one intermediate disc is also separated from the outer disc by a gap, in particular in order to avoid contact with the outer disc.
  • the at least one intermediate disk it is alternatively also possible for the at least one intermediate disk to substantially fill the entire gap between the inner disk and the outer disk. This causes a particularly high temperature drop across the washer.
  • the at least one washer is housed in a sealed interior of the heat appliance door. This prevents the at least one clouding in as an airgel washer in the course of an operation and thus loses its transparency, in particular transparency.
  • the interior may for example be limited in part by the inner pane and by the outer pane.
  • the interior may also be e.g. be limited by spacers for the inner pane and the outer pane and / or by lateral door profiles.
  • the at least one airgel disc is made of silica airgel.
  • the door may be a cooking appliance door, since cooking appliances may typically experience particularly high temperatures in the heat treatment space ("cooking space"). NEN and their cooking appliance doors are thus previously designed particularly complex, for example, are equipped with a ventilation.
  • the cooking appliance door may in particular be a baking-oven door, in particular a baking-oven door of a pyrolysis-capable baking oven.
  • the type of door is not limited and may include, for example, a door of a back car, a hinged door or a revolving door.
  • the object is also achieved by a household heat treatment device with a door as described above.
  • the household heat treatment device may be, for example, a clothes dryer, a sterilizer or a cooking appliance.
  • the cooking appliance may be, for example, a steamer or an oven.
  • the oven may in particular be an oven (including a combination appliance, for example with a microwave function and / or a steam cooking function).
  • the oven may in particular be a pyrolyseschreiber oven.
  • FIG. 1 shows a sectional view in an oblique view of an upper section of a door of a household heat treatment device
  • FIG. 2 shows a sectional view in an oblique view of a sketch of the door.
  • FIG. 1 shows a sectional view in an oblique view of an upper section of a non-ventilated oven door 1 for a household heat treatment device in the form of a baking oven B.
  • Fig.2 shows a sketch of the oven door 1 in side view.
  • the oven door 1 has a viewing window 2 for viewing outside A in a serving as a heat treatment chamber oven space G of the oven B.
  • the viewing window 2 is constructed as a transparent disc package which has an inner pane 3 adjoining the oven space G, an outer pane (front pane) 4 and an intermediate pane 5 spaced between the inner pane 3 and the outer pane 4. While the inner pane 3 and the outer pane 4 each consist of borofloat glass, the intermediate pane 5 is constructed of transparent silica airgel. And although the intermediate disc 5 is composed of two airgel discs 5a, 5b of a width of approximately 12 mm to 16 mm, which lie flat against each other.
  • the airgel intermediate disk 5 is separated from the inner disk 3 by a first, thin gap d1 having a width of approximately 1 mm, and from the outer disk 4 by a second, wider gap d2 having a width of about 3 mm.
  • the gaps d1 and d2 prevent contacting of the airgel intermediate disk 5 with the inner disk 3 or the outer disk 4, specifically to protect the airgel intermediate disk 5 against mechanical stress.
  • a direct heat conduction is prevented by the gaps d1 and d2.
  • This effect is more pronounced for the first gap d1. Consequently, in particular, the second gap d2 can also be drawn, so that the airgel intermediate disc 5 rests directly on the outer pane 4.
  • Such a configuration is also highly thermally insulating for the second gap d2, since airgel has a lower thermal conductivity than air.
  • the inner pane 3, the outer pane 4, lateral door profiles (see above), an upper spacer 6 and a lower spacer 7 form an interior space 8 in which the airgel washer 5 is accommodated.
  • the inner space 8 is sealed so as to prevent the airgel washer 5 from starting over time and losing its transparent property. Also, such contamination, e.g. by dust, vapors, etc. prevented.
  • the interior 8 may be generally filled with air or a inert or inert gas, e.g. Nitrogen or a noble gas, to be filled.
  • the interior 8 may alternatively be evacuated to allow even better thermal insulation.
  • a heat flow W from the oven space G to the outside A through the viewing window 2 can at least roughly be composed as follows: At the boundary between the Furnace space G and the directly adjacent inside of the inner pane 3 is a heat transfer to the inner pane 3 by forced heat convection and heat radiation instead. The heat flows by means of a heat conduction through the inner pane 3, wherein in the inner pane 3, a negative heat gradient in the flow direction of the heat flow W to the outside A occurs. The inner pane 3 is therefore colder on its outer side than on its inner side. At the following first gap d1, the heat conduction is interrupted, and a heat flow through the first gap d1 can occur only by free convection (in the case of non-evacuated interior 8) and heat radiation.
  • very low thermal conductivity airgel washer 5 occurs a very high negative heat gradient in the direction of flow to the outside A, so that an adjacent to the second gap d2 surface of the airgel washer 5 is already considerably colder than the furnace chamber G.
  • the temperature decreases further in the following second gap d2 (heat transfer by free convection (in the case of non-evacuated interior 8) and heat radiation) and by the outer pane 4 (heat transfer by heat conduction).
  • second gap d2 heat transfer by free convection (in the case of non-evacuated interior 8) and heat radiation
  • the outer pane 4 heat transfer by heat conduction
  • the household heat treatment device may also be another cooking appliance, or even a household appliance which is not a cooking appliance (for example a drying oven).
  • the door may generally have more than one washer, in particular more than one airgel washer.
  • an airgel washer may consist of only one airgel disk or more than two airgel disks lying flat on one another. LIST OF REFERENCES

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)

Abstract

L'invention concerne une porte (1) destinée à un appareil ménager de traitement thermique (B), cette porte (1) présentant une fenêtre (2) qui comporte au moins une vitre (5, 5a, 5b) en aérogel transparent. L'invention porte également sur un appareil ménager de traitement thermique (B) présentant une telle porte (1). L'appareil ménager de traitement thermique peut notamment être un four à pyrolyse (B).
PCT/EP2012/073964 2011-12-09 2012-11-29 Porte d'appareil ménager de traitement thermique Ceased WO2013083474A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12791784.7A EP2788687A1 (fr) 2011-12-09 2012-11-29 Porte d'appareil ménager de traitement thermique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011088093A DE102011088093A1 (de) 2011-12-09 2011-12-09 Tür für ein Haushalts-Wärmebehandlungsgerät
DE102011088093.3 2011-12-09

Publications (1)

Publication Number Publication Date
WO2013083474A1 true WO2013083474A1 (fr) 2013-06-13

Family

ID=47257827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/073964 Ceased WO2013083474A1 (fr) 2011-12-09 2012-11-29 Porte d'appareil ménager de traitement thermique

Country Status (3)

Country Link
EP (1) EP2788687A1 (fr)
DE (1) DE102011088093A1 (fr)
WO (1) WO2013083474A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015032511A1 (fr) * 2013-09-06 2015-03-12 D & A Concept Design Limited Article isolé
WO2016016096A1 (fr) * 2014-07-29 2016-02-04 BSH Hausgeräte GmbH Dispositif d'isolation, porte et appareil ménager de cuisson
EP3443272B1 (fr) * 2016-04-11 2025-02-19 Saint-Gobain Isover Dispositif fonctionnant à haute température comprenant un produit isolant, produit isolant adapté à un tel dispositif , et procédés d'utilisation et d'obtention d'un tel produit isolant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4034816A4 (fr) * 2019-11-02 2023-06-07 Femas Metal San. Ve Tic. A.S. Four domestique à porte à panneau amovible

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0475285A2 (fr) * 1990-09-11 1992-03-18 Miele & Cie. GmbH & Co. Four de cuisson avec moufle de four
DE29511926U1 (de) * 1995-05-31 1995-10-19 BSH Bosch und Siemens Hausgeräte GmbH, 81669 München Wärmedämmendes Gehäuse aus Glas
US5855953A (en) * 1994-03-31 1999-01-05 The Regents, University Of California Aerogel composites and method of manufacture
JP2005318818A (ja) * 2004-05-07 2005-11-17 Shichiyo Seisakusho:Kk デッキオーブンにおける開閉扉
WO2006065904A1 (fr) * 2004-12-15 2006-06-22 Cabot Corporation Matelas contenant un aerogel
US20060246806A1 (en) * 2005-01-05 2006-11-02 Aspen Aerogels, Inc. Transparent assemblies with ormosil aerogels
WO2007146945A2 (fr) * 2006-06-12 2007-12-21 Aspen Aerogels, Inc. Composites d'aérogel et de mousse
WO2010080060A1 (fr) 2009-01-08 2010-07-15 Ab Airglass Aérogel de silice en tant que panneau transparent dans une fenêtre permettant des économies d'énergie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0129763D0 (en) * 2001-12-12 2002-01-30 Ceramaspeed Ltd Electric heater
DE102005044347A1 (de) * 2005-09-16 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH Beleuchtungsvorrichtung für Backöfen und Backofen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0475285A2 (fr) * 1990-09-11 1992-03-18 Miele & Cie. GmbH & Co. Four de cuisson avec moufle de four
US5855953A (en) * 1994-03-31 1999-01-05 The Regents, University Of California Aerogel composites and method of manufacture
DE29511926U1 (de) * 1995-05-31 1995-10-19 BSH Bosch und Siemens Hausgeräte GmbH, 81669 München Wärmedämmendes Gehäuse aus Glas
JP2005318818A (ja) * 2004-05-07 2005-11-17 Shichiyo Seisakusho:Kk デッキオーブンにおける開閉扉
WO2006065904A1 (fr) * 2004-12-15 2006-06-22 Cabot Corporation Matelas contenant un aerogel
US20060246806A1 (en) * 2005-01-05 2006-11-02 Aspen Aerogels, Inc. Transparent assemblies with ormosil aerogels
WO2007146945A2 (fr) * 2006-06-12 2007-12-21 Aspen Aerogels, Inc. Composites d'aérogel et de mousse
WO2010080060A1 (fr) 2009-01-08 2010-07-15 Ab Airglass Aérogel de silice en tant que panneau transparent dans une fenêtre permettant des économies d'énergie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2788687A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015032511A1 (fr) * 2013-09-06 2015-03-12 D & A Concept Design Limited Article isolé
US20160213190A1 (en) * 2013-09-06 2016-07-28 D & A Concept Design Limited An insulated article
WO2016016096A1 (fr) * 2014-07-29 2016-02-04 BSH Hausgeräte GmbH Dispositif d'isolation, porte et appareil ménager de cuisson
US10436453B2 (en) 2014-07-29 2019-10-08 BSH Hausgeräte GmbH Insulation device, door and domestic cooking device
EP3443272B1 (fr) * 2016-04-11 2025-02-19 Saint-Gobain Isover Dispositif fonctionnant à haute température comprenant un produit isolant, produit isolant adapté à un tel dispositif , et procédés d'utilisation et d'obtention d'un tel produit isolant

Also Published As

Publication number Publication date
DE102011088093A1 (de) 2013-06-13
EP2788687A1 (fr) 2014-10-15

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