EP0857928B1 - Heat insulated housing - Google Patents

Heat insulated housing Download PDF

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Publication number
EP0857928B1
EP0857928B1 EP98100744A EP98100744A EP0857928B1 EP 0857928 B1 EP0857928 B1 EP 0857928B1 EP 98100744 A EP98100744 A EP 98100744A EP 98100744 A EP98100744 A EP 98100744A EP 0857928 B1 EP0857928 B1 EP 0857928B1
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EP
European Patent Office
Prior art keywords
channel system
thermally insulating
insulating housing
housing according
thermal insulation
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.)
Expired - Lifetime
Application number
EP98100744A
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German (de)
French (fr)
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EP0857928A1 (en
Inventor
Udo Dr.Dipl.-Phys. Wenning
Wolfram Dr. Dipl.-Chem. Wacker
Hans-Frieder Dipl.-Phys. Eberhardt
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
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Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to SI9830466T priority Critical patent/SI0857928T1/en
Publication of EP0857928A1 publication Critical patent/EP0857928A1/en
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Publication of EP0857928B1 publication Critical patent/EP0857928B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/06Walls
    • F25D23/062Walls defining a cabinet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00Insulation
    • F25D2201/10Insulation with respect to heat
    • F25D2201/14Insulation with respect to heat using subatmospheric pressure

Definitions

  • the invention relates to a heat-insulating housing for a thermally insulating Utility room arranged in a device such as a household refrigerator or freezer, a household oven or the like, with a housing outer wall, one of them spaced housing inner wall, which together form a gap enclose, which is evacuated at least via a connection point and which with an evacuable thermal insulation material for supporting the gap enclosing walls is filled, wherein within the space at least one partially provided within the heat insulating material extending channel system is, which traverses the gap at least largely as far as possible and which is fluidically connected to an evacuation nozzle.
  • thermo-insulating based on vacuum insulation technology Enclosures to be evacuated for the purpose of isolation, from the Housing outer walls hermetically enclosed spaces with To fill heat insulation material. This serves in addition to an additional heat insulation especially on top of that, the shell to be evacuated shell-like enclosing Housing walls against the due to the pressure drop within the cavity itself support resulting pressure difference to the outside atmosphere. That for support introduced thermal insulation material, however, entails that for the production a vacuum sufficient for thermal insulation evacuation required are significantly increased.
  • heat-insulating housings To reduce the evacuation times when using vacuum insulation technology heat-insulating housings is from DE 3940649A1 a heat insulating trained housing known between the Gezzauseinnen- and Housing outer walls designed as a molded heat insulating material is introduced. This is to reduce the suction resistance and thus to Reduction of pumping time during the evacuation process with grooved Wells equipped, the fluidic to an evacuation nozzle are connected.
  • the arrangement of the Evakuierstutzens is directly one of associated groove-like suction channels.
  • the invention is based on the object, in a housing according to the preamble of claim 1 to propose measures on the basis of which in a simple way the Disadvantages of the prior art are avoided.
  • the invention causes Introduction of a sewer or piping system in the evacuated Gap through the significant shortening of the evacuation a targeted, largely unimpeded air discharge and thus pressure reduction of the Heat insulation material filled gap.
  • the evacuation tube ends of the Channel system.
  • the evacuation can be in terms of his Make dimensions very small and unobtrusive. At the same time this results also a significant simplification of the fluidic connection to the Evacuation nozzle, so that potential leakages and resulting Leakage losses are drastically reduced.
  • a collection point for evakuierstutzen discourseen ends of Channel system formed when, according to a next advantageous embodiment of the Object of the invention is provided that the evacuation in the center of the Atrium-trained collection point is arranged.
  • Particularly effective and time-saving can be an evacuation process with a thermal insulation material perform filled gap of a heat-insulating housing, if according to a next preferred embodiment of the subject of the Invention is provided, that the channel system composed of individual channels and at least partially incorporated in the thermal insulation material.
  • the heat insulation material of open-cell, plate-shaped Foamed materials is formed, in which the channel system of individual channels assembled and machined is introduced.
  • the heat insulating material formed of plate-shaped glass fiber materials is, in which the channel system is formed.
  • Such a design of the glass fiber mats is unnecessary for the purpose of a drastically reducing the evacuation time adding additional, within the too evacuating gap due to production still consuming to be introduced spacer between the glass fiber mats. Due to the surface enlargement of the Glass fiber mats of the edge-open air ducts formed therein without cutting produce a result wrinkle-free installation of thin-walled housing interior and exterior exterior wall of the Surface of the thermal insulation material.
  • the heat insulating material is formed as evacuated bulk material is, within which a prefabricated composed of pipelines Channel system is embedded.
  • a particularly significant reduction in evacuation time due to a particularly strong Shortening of the Evakuierwege results when, according to another preferred embodiment the subject of the invention is provided that from piping joined duct system over at least part of its length and its cable circumference is provided with openings.
  • FIG. 1 is a household refrigerator 10 with a heat-insulating housing 11, which has a thin-walled foil-like metal outer shell 12 and a spaced apart, lining the interior of the housing 11 Metal interior trim 13 of the same material thickness is formed. This is at her free Edges with the free edges of the metal outer shell 12 via a connecting frame 14 vacuum-tight, whereby between the metal outer shell 12th and the metal inner panel 13 a hermetically sealed vacuum-tight Interspace 15 is formed.
  • open-cell thermal insulation material 16th filled which for example made of open-cell polyurethane foam or Polyisocyanurate foam, polystyrene foam or other open cell Polymer foam is formed and which is formed into plate bodies, of which one as Deckenisolier emotions 17, one as gearwandisolier emotions 18, another as Bodenisolier emotions 19 serves as two mirror-inverted insulation as Sidewall insulating 20 are provided.
  • the insulating body 17 to 20 are in terms their plate thickness on the distance between the metal outer shell 12 and the Metal interior trim 13 matched and in terms of their body area and Body geometry to the surface and geometry of the corresponding housing wall customized.
  • the insulating body for the individual wall sections of the heat-insulating Housing 11 are on their metal inner panel 13 facing side with machining processes such as milling, sawing or the like, for Metal interior trim 13 out towards open-edge channels 21 provided.
  • the channels 21 are approximately the same Spaces across the insulating body 17 to 20 arranged and over the Rear wall insulating 18 connected to a continuous channel system.
  • the channels 21 are net-like applied to the rear wall insulating body 18, wherein the free ends of the net-like channels 21 on the back wall insulating body 18 as Connected pads 22 adjacent to the remindwandisolier emotions 18 further insulating 17, 19 and 20 serve.
  • the net-like channels 21 am remindwandisolier emotions 18 are formed in an atrium 23, ring-like assembled collection center, in the center of which on the outside of the Rear wall portion of the metal outer shell 12 provided Evakuierstutzen 24th opens, which as a central connection point for a not shown evacuation pump for Evacuation of the gap 15 is used.
  • Evakuierstutzen 24th opens, which as a central connection point for a not shown evacuation pump for Evacuation of the gap 15 is used.
  • the evacuation nozzle 24 provided rear wall portion of the heat-insulating housing 11 is this with a tarnished as well as thermally insulating formed over a circumferentially arranged magnetic seal 25 on the housing edge elastically resting door 26 provided.
  • the heat-insulating housing 11 made of a thin-walled metallic cladding 27 (e.g., stainless steel) which hermetically seals Interspace 28 encloses, which with serving for heat insulation of the door 26 plate-shaped insulating material 29 on the basis of the heat insulation of the Housing 11 serving thermal insulation material 16 is completely filled.
  • the plate-shaped heat insulating material 29 for heat insulation of the door 26 is like the at the heat-insulating housing 11 for use coming insulator with by machined shaping channels 30 covered in a network-like manner, which, like the channels 21 provided on the rear wall insulating body 18, are not in one merged collection point and fluidly with a not are shown connected Evakuierstutzen.
  • the housing 11 can also be used glass fiber mats, which like the foamed plate body are provided with channels, their arrangement and Embodiment which corresponds to the plate-shaped insulating body.
  • heat insulation of the housing 11 instead of the plate-shaped insulating materials heat-insulating, 15 or 28 constantly to be compacted bulk material such as diatomaceous earth or aerogels during the filling process of the gap, the latter having a density of 80 to 120 kg / m 3 and a surface of 7 x 10 5 m 2 / kg should have.
  • this bulk material channels which as shown in Fig.
  • the conduits 35 are like the channels 21 merged into a collection point and formed in the region of the rear wall of the housing to produce the net-like structure of short interconnected pipe sections.
  • the pipes 35 are provided for the purpose of improved air flow at its pipe wall 36 with approximately uniformly over its Wandungshunt and over its wall length arranged openings 37.
  • the pipes 35 in the individual housing wall sections of the heat-insulating housing 11 are connected at their interface to the provided in the rear wall of the housing 11 reticulated pipe assembly with elastic or correspondingly shaped connecting elements to a contiguous duct or piping system, which centrally via an opening in the collection evacuation nozzle is sucked.
  • the openings 37 in the pipe walls 36 are dimensioned so that the cross section is smaller than the cross section of the bulk material.
  • these are manufactured as prefabricated units made of different metals or of plastics with low diffusion and prior to filling the housing 11 or the door 26 with the formed as bulk heat insulating material in the intermediate space 15 and 28 respectively are inserted and then evacuation time optimized positioned. Furthermore, it is conceivable that in order to compensate for diffusion processes within the intermediate spaces 15 or 28 getter materials are inserted to compensate for the diffusion processes.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)
  • Refrigerator Housings (AREA)

Description

Die Erfindung betrifft ein wärmeisolierendes Gehäuse für einen thermisch isolierenden Nutzraum, angeordnet in einem Gerät, wie einem Haushaltskühl- oder -gefriergerät, einem Haushaltsbackofen oder dergleichen, mit einer Gehäuseaußenwand, einer dazu beabstandeten Gehäuseinnenwand, welche zusammen einen Zwischenraum umschließen, welcher zumindest über eine Anschlußstelle evakuierbar ist und welcher mit einem evakuierbaren Wärmeisolationsmaterial zur Abstützung der den Zwischenraum umschließenden Wände verfüllt ist, wobei innerhalb des Zwischenraums ein zumindest teilweise innerhalb des Wärmeisolationsmaterials verlaufendes Kanalsystem vorgesehen ist, welches den Zwischenraum zumindest weitestgehend flächendeckend durchzieht und welches mit einem Evakuierstutzen strömungstechnisch verbunden ist.The invention relates to a heat-insulating housing for a thermally insulating Utility room arranged in a device such as a household refrigerator or freezer, a household oven or the like, with a housing outer wall, one of them spaced housing inner wall, which together form a gap enclose, which is evacuated at least via a connection point and which with an evacuable thermal insulation material for supporting the gap enclosing walls is filled, wherein within the space at least one partially provided within the heat insulating material extending channel system is, which traverses the gap at least largely as far as possible and which is fluidically connected to an evacuation nozzle.

Es ist bekannt, bei auf Vakuumisolationstechnik basierenden wärmeisolierenden Gehäusen, die zum Zwecke der Isolation zu evakuierenden, von den Gehäuseaußenwänden hermetisch umschlossenen Zwischenräume mit Wärmeisolationsmaterial zu verfüllen. Dies dient neben einer zusätzlichen Wärmeisolation vor allem noch dazu, die den zu evakuierenden Hohlraum schalenartig umschließenden Gehäusewände gegen den aufgrund der Druckabsenkung innerhalb des Hohlraumes sich ergebenden Druckunterschied zur Außenatmosphäre abzustützen. Das zur Abstützung eingebrachte Wärmeisolationsmaterial bringt jedoch mit sich, daß die zur Erzeugung eines für Wärmeisolationszwecke ausreichenden Vakuums erforderlichen Evakuierzeiten deutlich erhöht sind.It is known in thermo-insulating based on vacuum insulation technology Enclosures to be evacuated for the purpose of isolation, from the Housing outer walls hermetically enclosed spaces with To fill heat insulation material. This serves in addition to an additional heat insulation especially on top of that, the shell to be evacuated shell-like enclosing Housing walls against the due to the pressure drop within the cavity itself support resulting pressure difference to the outside atmosphere. That for support introduced thermal insulation material, however, entails that for the production a vacuum sufficient for thermal insulation evacuation required are significantly increased.

Zur Reduzierung der Evakuierzeiten bei auf Vakuumisolationstechnik basierenden wärmeisolierenden Gehäusen ist aus der DE3940649A1 ein wärmeisolierend ausgebildetes Gehäuse bekannt, zwischen deren Gehäuseinnen- und Gehäuseaussenwänden ein als Formteil ausgebildetes Wärmeisolationsmaterial eingebracht ist. Dieses ist zur Verringerung des Saugwiderstandes und damit zur Reduzierung der Pumpdauer während des Evakuiervorganges mit rillenformigen Vertiefungen ausgestattet, die strömungstechnisch an einen Evakuierstutzen angeschlossen sind. Die Anordnung des Evakuierstutzens ist dabei unmittelbar einem der rillenartigen Saugkanäle zugeordnet. Eine derartige Anordnung des Evakuierstutzens bringt aufgrund der geringen Breite der rillenartigen Vertiefungen unweigerlich mit sich, das dessen Positionierung zu einer der rillenartigen Vertiefungen sehr zeitaufwendig und somit kostenintensiv ist, um einen deutlichen Verlust an Evakuiereffizienz für den Fall zu vermeiden, dass der Evakuierstutzen zumindest abschnittsweise seitlich neben dem Saugkanal liegt.To reduce the evacuation times when using vacuum insulation technology heat-insulating housings is from DE 3940649A1 a heat insulating trained housing known between the Gehäuseinnen- and Housing outer walls designed as a molded heat insulating material is introduced. This is to reduce the suction resistance and thus to Reduction of pumping time during the evacuation process with grooved Wells equipped, the fluidic to an evacuation nozzle are connected. The arrangement of the Evakuierstutzens is directly one of associated groove-like suction channels. Such an arrangement of Evakuierstutzens due to the small width of the groove-like depressions inevitably entails its positioning to one of the groove-like depressions very time consuming and Thus, it is costly to allow for a significant loss of evacuation efficiency in the event avoid that the evacuation nozzle at least partially laterally next to the Suction channel is located.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Gehäuse gemäß dem Oberbegriff des Anspruches 1 Maßnahmen vorzuschlagen, aufgrund derer auf einfache Weise die Nachteile des Standes der Technik vermieden sind.The invention is based on the object, in a housing according to the preamble of claim 1 to propose measures on the basis of which in a simple way the Disadvantages of the prior art are avoided.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, dass zur strömungstechnischen Anbindung des Kanalsystems an den Evakuierstutzen wenigstens eine als Vorhof ausgebildete, ringähnlich angelegte Sammelstelle vorgesehen ist, die den Evakuierstutzen ringförmig umgibt.This object is achieved according to the invention characterized in that the fluidic Connection of the duct system to the evacuation nozzle at least one as a forecourt trained, ring-like designed collection point is provided, the Evacuation nozzle surrounds annular.

Hierdurch ergibt sich strömungstechnisch eine besonders günstige Anbindung des als Sammelstelle ausgebildeten Vorhofes an den Evakuierstutzen. Darüberhinaus ist durch die erfindungsgemäße Lösung auf besonders einfache Art und Weise die Gefahr potentieller Leckagen deutlich verringert. Ausserdem bewirkt die erfindungsgemässe Einbringung eines Kanal- oder Rohrleitungssystems in dem zu evakuierenden Zwischenraum durch die deutliche Verkürzung der Evakuierwege eine gezielte, weitestgehend ungehinderte Luftabführung und damit Druckabsenkung des mit Wärmeisolationsmaterial verfüllten Zwischenraums. Durch die Verbesserung der Luftabführung ergibt sich eine drastische Reduzierung der Evakuierzeit eines zu evakuierenden Zwischenraums, wodurch die Fertigungszeit eines auf vakuumisolationsbasis herzustellenden Gehäuses deutlich verringert und somit der Fertigungsausstoss für derartige Gehäuse in gleichem Maße erhöht ist. Ferner lassen sich solche Kanal- oder Rohrleitungssysteme durch ihren zusammenhängenden Aufbau besonders einfach und zielgerichtet innerhalb des zu evakuierenden Hohlraumes positionieren. Ausserdem lassen sich die zur effektiven Evakuierung abzuführenden Luftmengen auf einfache Weise durch die Kanalabmessung gezielt beeinflussen.This results in fluidically a particularly favorable connection of the Collection point trained forecourt to the evacuation tube. Moreover, it is through the solution according to the invention in a particularly simple way the danger potential leaks significantly reduced. In addition, the invention causes Introduction of a sewer or piping system in the evacuated Gap through the significant shortening of the evacuation a targeted, largely unimpeded air discharge and thus pressure reduction of the Heat insulation material filled gap. By improving the Air discharge results in a drastic reduction in the evacuation of a too evacuating gap, thereby increasing the production time vacuum insulation base produced housing significantly reduced and thus the Production output for such housing is increased to the same extent. Further let such ducting or piping systems by their cohesive structure particularly simple and targeted within the cavity to be evacuated position. In addition, can be paid for the effective evacuation Air quantities in a simple manner by the channel size affect targeted.

Nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, dass in der zur strömungstechnischen Anbindung des Kanalsystems an den Evakuierstutzen dienenden Sammelstelle die evakuierstutzenseitigen Enden des Kanalsystems münden. According to a preferred embodiment of the subject invention provided that in the fluidic connection of the channel system to the Evacuation nozzle serving collection point the evacuation tube ends of the Channel system.

Durch eine solche Maßnahme läßt sich der Evakuierstutzen hinsichtlich seiner Abmessungen besonders klein und unauffällig gestalten. Gleichzeitig ergibt sich hierdurch auch noch eine deutliche Vereinfachung der strömungstechnischen Anbindung an den Evakuierstutzen, so daß potentielle Leckmöglichkeiten und daraus resultierende Leckverluste drastisch reduziert sind.By such a measure, the evacuation can be in terms of his Make dimensions very small and unobtrusive. At the same time this results also a significant simplification of the fluidic connection to the Evacuation nozzle, so that potential leakages and resulting Leakage losses are drastically reduced.

Besonders zweckmäßig ist eine Sammelstelle für die evakuierstutzenseitigen Enden des Kanalsystems ausgebildet, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der Evakuierstutzen im Zentrum der als Vorhof ausgebildeten Sammelstelle angeordnet ist.Particularly useful is a collection point for evakuierstutzenseitigen ends of Channel system formed when, according to a next advantageous embodiment of the Object of the invention is provided that the evacuation in the center of the Atrium-trained collection point is arranged.

Besonders effektiv und zeitsparend läßt sich ein Evakuiervorgang eines mit Wärmeisolationsmaterial verfüllten Zwischenraumes eines wärmeisolierenden Gehäuses durchführen, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß das Kanalsystem aus Einzelkanälen zusammengesetzt und zumindest teilweise in das Wärmeisolationsmaterial eingebracht ist.Particularly effective and time-saving can be an evacuation process with a thermal insulation material perform filled gap of a heat-insulating housing, if according to a next preferred embodiment of the subject of the Invention is provided, that the channel system composed of individual channels and at least partially incorporated in the thermal insulation material.

Entsprechend einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Wärmeisolationsmaterial aus offenzelligen, plattenförmigen Schaumwerkstoffen gebildet ist, in welche das Kanalsystem aus Einzelkanälen zusammengesetzt und spanabhebend eingebracht ist.According to a further preferred embodiment of the subject of the invention is provided that the heat insulation material of open-cell, plate-shaped Foamed materials is formed, in which the channel system of individual channels assembled and machined is introduced.

Durch eine derartige Maßnahme erübrigt sich die Bereitstellung eines zusätzlichen, innerhalb des zu evakuierenden Zwischenraumes zu positionierenden und dadurch den Fertigungsablauf hemmenden Kanal- oder Rohrleitungssystems. Ferner ergibt sich durch eine solche Lösung die Möglichkeit, kostengünstige, herstellungsbedingt an seinen Außenflächen ausgebildete plattenförmige Schaumwerkstoffe einsetzen zu können, welche durch die zielgerichtete spanabhebende Bearbeitung an dem eine drastische Reduzierung der Evakuierzeit herbeiführenden Stellen offenzellig gestaltet sind. Darüberhinaus ist durch die Ausgestaltung des Wärmeisolationsmaterials mit randoffenen Luftkanälen erreicht, daß aufgrund der hierdurch erzielten Oberflächenvergrößerung des Wärmeisolationsmaterials eine Faltenbildung an der Gehäuseaußenwand und an der Gehäuseinnenwand nach dem Evakuiervorgang des wärmeisolierenden Gehäuses vermieden ist.Such a measure makes it unnecessary to provide an additional to be positioned within the space to be evacuated and thereby the Production process inhibiting sewer or piping system. Furthermore, results from Such a solution the possibility of cost-effective, production-related to his Be able to use outer surfaces formed plate-shaped foam materials, which by the targeted machining at the one drastic Reduction of Evakuierzeit inducing sites are designed open-celled. Moreover, by the design of the heat insulation material with open-edged Air ducts achieved that, due to the surface enlargement achieved thereby Heat insulation material wrinkling on the housing outer wall and at the Housing inner wall after the evacuation process of the heat-insulating housing is avoided.

Darüberhinaus ist es bei Polystyrol möglich, das Kanalsystem spanlos durch Verformung seiner Oberfläche zu erzeugen. Moreover, it is possible in polystyrene, the channel system without cutting by deformation to produce its surface.

Gemäß einer alternativen Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Wärmeisolationsmaterial aus plattenförmigen Glasfaserwerkstoffen gebildet ist, in welche das Kanalsystem eingeformt ist.According to an alternative embodiment of the subject matter of the invention, it is provided that the heat insulating material formed of plate-shaped glass fiber materials is, in which the channel system is formed.

Durch eine derartige Ausgestaltung der Glasfasermatten erübrigt sich zum Zwecke einer drastischen Reduzierung der Evakuierzeit die Einbringung zusätzlicher, innerhalb des zu evakuierenden Zwischenraumes fertigungsbedingt noch aufwendig einzubringender Abstandshalter zwischen den Glasfasermatten. Durch die Oberflächenvergrößerung an den Glasfasermatten der darin spanlos eingeformten randoffenen Luftkanäle ergibt sich eine faltenfreie Anlage der dünnwandigen Gehäuse innen- und Gehäußeaußenwand an die Oberfläche des Wärmeisolationsmaterials.Such a design of the glass fiber mats is unnecessary for the purpose of a drastically reducing the evacuation time adding additional, within the too evacuating gap due to production still consuming to be introduced spacer between the glass fiber mats. Due to the surface enlargement of the Glass fiber mats of the edge-open air ducts formed therein without cutting produce a result wrinkle-free installation of thin-walled housing interior and exterior exterior wall of the Surface of the thermal insulation material.

Gemäß einer weiteren alternativen Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Wärmeisolationsmaterial als evakuierbares Schüttgut ausgebildet ist, innerhalb welchem ein vorgefertigtes aus Rohrleitungen zusammengesetztes Kanalsystem eingebettet ist.According to a further alternative embodiment of the subject matter of the invention provided that the heat insulating material is formed as evacuated bulk material is, within which a prefabricated composed of pipelines Channel system is embedded.

Hierdurch wird die bei als Schüttgut wie Aerogelen oder Kieselgur an sich notwendige Evakuierzeit eines mit diesem Schüttgut fest verfüllten Zwischenraumes eines wärmeisolierenden Gehäuses stark herabgesetzt.As a result, the bulk material such as aerogels or kieselguhr is necessary Evacuation time of a solid space filled with this bulk material heat-insulating housing greatly reduced.

Eine besonders deutliche Verringerung der Evakuierzeit infolge einer besonders starken Verkürzung der Evakuierwege ergibt sich, wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß das aus Rohrleitungen zusammengefügte Kanalsystem zumindest über einen Teil seiner Leitungslänge und seines Leitungsumfanges mit Durchbrüchen versehen ist.A particularly significant reduction in evacuation time due to a particularly strong Shortening of the Evakuierwege results when, according to another preferred embodiment the subject of the invention is provided that from piping joined duct system over at least part of its length and its cable circumference is provided with openings.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert.The invention is described in the following description with reference to one in the attached Drawing simplified illustrated embodiment explained.

Es zeigen:

Fig. 1
in vereinfachter schematischer Darstellung einen Haushaltskühlschrank mit einem wärmeisolierenden Gehäuse, dessen Wände zur Wärmeisolation mit offenzelligen Hartschaumplatten ausgestattet sind, welche zu einem Kanalsystem zusammengesetzte Kanäle aufweisen, in Schnittdarstellung von der Seite,
Fig. 2
die zur Wärmeisolation der Gehäusewände dienenden Hartschaumplatten mit ihrem zu einem Kanalsystem zusammengesetzten Kanälen, in abgewickelter Darstellung von vorne und
Fig. 3
eine alternative Ausführungsform eines abschnittsweise dargestellten zu einem Kanalsystem zusammenfügbaren Kanals.
Show it:
Fig. 1
in a simplified schematic representation of a household refrigerator with a heat-insulating housing, the walls are equipped for heat insulation with open-cell foam panels, which have composite channels to a channel system, in sectional view from the side,
Fig. 2
serving for heat insulation of the housing walls rigid foam panels with their composite into a channel system channels in unwound representation of the front and
Fig. 3
an alternative embodiment of a partially joined together to a channel system channel.

Gemäß Figur 1 ist ein Haushaltskühlschrank 10 mit einem wärmeisolierenden Gehäuse 11 gezeigt, welches einen dünnwandigen folienähnlichen Metallaußenmantel 12 und einen dazu beabstandeten, den Innenraum des Gehäuses 11 auskleidenden Metallinnenverkleidung 13 gleicher Materialstärke gebildet ist. Diese ist an ihren freien Rändern mit den freien Rändern des Metallaußenmantels 12 über einen Verbindungsrahmen 14 vakuumdicht verbunden, wodurch zwischen dem Metallaußenmantel 12 und der Metallinnenverkleidung 13 ein hermetisch umschlossener vakuumdichter Zwischenraum 15 gebildet ist. Dieser ist mit offenzelligem Wärmeisolationsmaterial 16 verfüllt, welches beispielsweise aus offenzelligem Polyurethanschaum bzw. Polyisocyanuratschaum, Polystyrolschaum oder anderem offenzelligem Polymerschäumen gebildet ist und welches zu Plattenkörpern geformt ist, von denen einer als Deckenisolierkörper 17, einer als Rückwandisolierkörper 18, ein weiterer als Bodenisolierkörper 19 dient, während zwei spiegelbildlich ausgebildete Isolierplatten als Seitenwandisolierkörper 20 vorgesehen sind. Die Isolierkörper 17 bis 20 sind hinsichtlich ihrer Plattenstärke auf den Abstand zwischen dem Metallaußenmantel 12 und der Metallinnenverkleidung 13 abgestimmt und hinsichtlich ihrer Körperfläche und Körpergeometrie an die Fläche und Geometrie der entsprechenden Gehäusewandung angepaßt. Die Isolierkörper für die einzelnen Wandabschnitte des wärmeisolierenden Gehäuses 11 sind an ihrer der Metallinnenverkleidung 13 zugewandten Seite mit durch spanende Verarbeitungsverfahren wie Fräsen, Sägen oder dergleichen hergestellten, zur Metallinnenverkleidung 13 hin randoffen ausgebildeten Kanälen 21 versehen.According to Figure 1 is a household refrigerator 10 with a heat-insulating housing 11, which has a thin-walled foil-like metal outer shell 12 and a spaced apart, lining the interior of the housing 11 Metal interior trim 13 of the same material thickness is formed. This is at her free Edges with the free edges of the metal outer shell 12 via a connecting frame 14 vacuum-tight, whereby between the metal outer shell 12th and the metal inner panel 13 a hermetically sealed vacuum-tight Interspace 15 is formed. This is with open-cell thermal insulation material 16th filled, which for example made of open-cell polyurethane foam or Polyisocyanurate foam, polystyrene foam or other open cell Polymer foam is formed and which is formed into plate bodies, of which one as Deckenisolierkörper 17, one as Rückwandisolierkörper 18, another as Bodenisolierkörper 19 serves as two mirror-inverted insulation as Sidewall insulating 20 are provided. The insulating body 17 to 20 are in terms their plate thickness on the distance between the metal outer shell 12 and the Metal interior trim 13 matched and in terms of their body area and Body geometry to the surface and geometry of the corresponding housing wall customized. The insulating body for the individual wall sections of the heat-insulating Housing 11 are on their metal inner panel 13 facing side with machining processes such as milling, sawing or the like, for Metal interior trim 13 out towards open-edge channels 21 provided.

Wie insbesondere aus Fig.2 hervorgeht, sind die Kanäle 21 in annähernd gleichen Abständen flächendeckend über die Isolierkörper 17 bis 20 angeordnet und über den Rückwandisolierkörper 18 zu einem zusammenhängenden Kanalsystem verbunden. Zu diesem Zweck sind die Kanäle 21 am Rückwandisolierkörper 18 netzartig angelegt, wobei die freien Enden der netzartig angelegten Kanäle 21 am Rückwandisolierkörper 18 als Anschlußstellen 22 für die zum Rückwandisolierkörper 18 benachbart angeordneten weiteren Isolierkörper 17, 19 und 20 dienen. Die netzartig angelegten Kanäle 21 am Rückwandisolierkörper 18 sind in einer als Vorhof 23 ausgebildeten, ringähnlich angelegten Sammelstelle zusammengeführt, in deren Zentrum ein an der Außenseite des Rückwandabschnittes des Metallaußenmantels 12 vorgesehenen Evakuierstutzen 24 mündet, welcher als zentrale Anschlußstelle für eine nicht gezeigte Evakuierpumpe zur Evakuierung des Zwischenraumes 15 dient. Gegenüber des mit dem Evakuierstutzen 24 versehenen Rückwandabschnittes des wärmeisolierenden Gehäuses 11 ist dieses mit einer daran angeschlagenen ebenso wärmeisolierend ausgebildeten, über eine umlaufend angeordnete Magnetdichtung 25 am Gehäuserand elastisch aufliegenden Tür 26 versehen. Diese ist wie das wärmeisolierende Gehäuse 11 aus einem dünnwandigen metallischen Hüllmantel 27 (z.B. Edelstahl) gebildet, welcher hermetisch einen Zwischenraum 28 umschließt, welcher mit zur Wärmeisolation der Tür 26 dienenden plattenförmigen Isolationsmaterial 29 auf der Basis des zur Wärmeisolierung des Gehäuses 11 dienenden Wärmeisolationsmaterial 16 vollständig ausgefüllt ist. Das plattenförmige Wärmeisolationsmaterial 29 zur Wärmeisolierung der Tür 26 ist wie die beim wärmeisolierenden Gehäuse 11 zur Anwendung kommenden Isolierkörper mit durch spanabhebende Formgebung eingebrachte Kanäle 30 flächendeckend netzartig überzogen, welche wie die am Rückwandisolierkörper 18 vorgesehenen Kanäle 21 in einer nicht dargestellten Sammelstelle zusammengeführt und strömungstechnisch mit einem nicht gezeigten Evakuierstutzen verbunden sind.As can be seen in particular from Fig.2, the channels 21 are approximately the same Spaces across the insulating body 17 to 20 arranged and over the Rear wall insulating 18 connected to a continuous channel system. To For this purpose, the channels 21 are net-like applied to the rear wall insulating body 18, wherein the free ends of the net-like channels 21 on the back wall insulating body 18 as Connected pads 22 adjacent to the Rückwandisolierkörper 18 further insulating 17, 19 and 20 serve. The net-like channels 21 am Rückwandisolierkörper 18 are formed in an atrium 23, ring-like assembled collection center, in the center of which on the outside of the Rear wall portion of the metal outer shell 12 provided Evakuierstutzen 24th opens, which as a central connection point for a not shown evacuation pump for Evacuation of the gap 15 is used. Opposite the with the evacuation nozzle 24 provided rear wall portion of the heat-insulating housing 11 is this with a tarnished as well as thermally insulating formed over a circumferentially arranged magnetic seal 25 on the housing edge elastically resting door 26 provided. This is like the heat-insulating housing 11 made of a thin-walled metallic cladding 27 (e.g., stainless steel) which hermetically seals Interspace 28 encloses, which with serving for heat insulation of the door 26 plate-shaped insulating material 29 on the basis of the heat insulation of the Housing 11 serving thermal insulation material 16 is completely filled. The plate-shaped heat insulating material 29 for heat insulation of the door 26 is like the at the heat-insulating housing 11 for use coming insulator with by machined shaping channels 30 covered in a network-like manner, which, like the channels 21 provided on the rear wall insulating body 18, are not in one merged collection point and fluidly with a not are shown connected Evakuierstutzen.

Anstatt der aus offenzelligen Hartschäumen gebildeten Plattenkörper zur Wärmeisolation des Gehäuses 11 können auch Glasfasermatten zum Einsatz kommen, welche wie die geschäumten Plattenkörper mit Kanälen versehen sind, deren Anordnung und Ausgestaltung denen der plattenförmigen Isolierkörper entspricht.Instead of the plate body formed from open-cell rigid foams for heat insulation the housing 11 can also be used glass fiber mats, which like the foamed plate body are provided with channels, their arrangement and Embodiment which corresponds to the plate-shaped insulating body.

Alternativ zu dem beschriebenen Ausführungsbeispiel ist es auch möglich, daß zur Wärmeisolierung des Gehäuses 11 anstatt der plattenförmigen Isolationsmaterialien wärmeisolierendes, während des Verfüllvorganges des Zwischenraumes 15 bzw. 28 ständig zu verdichtendes Schüttgut wie Kieselgur oder Aerogele zum Einsatz kommen, wobei letztere eine Dichte von 80 bis 120 kg/m3 und eine Oberfläche von 7 x 105 m2/kg aufweisen sollen. Um auch bei dieser Art von Wärmeisolationsmaterial eine deutliche Reduzierung der Evakuierzeit zu erreichen, ist vorgesehen, in dieses Schüttgut Kanäle einzubetten, welche wie unter Fig. 3 gezeigt ist als Rohrleitungen 35 ausgebildet sind, welche wie die Kanäle 21 an der Decke, am Boden und an den beiden Seitenwänden des wärmeisolierenden Gehäuses in einer Richtung verlaufen, während sie an der Rückwand des wärmeisolierenden Gehäuses 11 und an der Tür 26 netzartig flächendeckend angelegt sind. Die Rohrleitungen 35 sind wie die Kanäle 21 in einer Sammelstelle zusammengeführt und im Bereich der Gehäuserückwand zur Erzeugung des netzartigen Aufbaues aus kurzen miteinander verbundenen Rohrabschnitten gebildet. Die Rohrleitungen 35 sind zum Zweck des verbesserten Luftdurchsatzes an ihrer Rohrwandung 36 mit annähernd gleichmäßig über ihren Wandungsumfang und über ihre Wandungslänge angeordneten Durchbrüchen 37 versehen. Die Rohrleitungen 35 in den einzelnen Gehäusewandabschnitten des wärmeisolierenden Gehäuses 11 sind an ihrer Schnittstelle zu den in der Rückwand des Gehäuses 11 vorgesehenen netzartigen Rohrleitungsanordnung mit elastischen oder entsprechend geformten Verbindungselementen zu einem zusammenhängenden Kanal- oder Rohrleitungssystem verbunden, welches zentral über einen in der Sammelstelle mündenden Evakuierstutzen absaugbar ist. Die Durchbrüche 37 in den Rohrwandungen 36 sind dabei so bemessen, daß deren Querschnitt geringer als der Querschnitt des Schüttgutes ist. Für die Rohrleitungen 35 ist es vorstellbar, daß diese als vorgefertigte Einheiten aus verschiedenen Metallen oder aus mit geringer Diffusion ausgestatteten Kunststoffen hergestellt sind und vor dem Verfüllen des Gehäuses 11 bzw. der Tür 26 mit dem als Schüttgut ausgebildeten Wärmeisolationsmaterial in den Zwischenraum 15 bzw. 28 eingelegt und dann evakuierzeitoptimiert positioniert sind. Ferner ist es denkbar, daß zum Ausgleich von Diffusionsvorgängen innerhalb der Zwischenräume 15 bzw. 28 Getterwerkstoffe zum Ausgleich der Diffusionsvorgänge eingelegt sind.As an alternative to the described embodiment, it is also possible that for heat insulation of the housing 11 instead of the plate-shaped insulating materials heat-insulating, 15 or 28 constantly to be compacted bulk material such as diatomaceous earth or aerogels during the filling process of the gap, the latter having a density of 80 to 120 kg / m 3 and a surface of 7 x 10 5 m 2 / kg should have. In order to achieve a significant reduction in the evacuation even with this type of heat insulation material, it is provided to embed in this bulk material channels, which as shown in Fig. 3 are formed as pipes 35, which like the channels 21 on the ceiling, on the floor and run on the two side walls of the heat-insulating housing in one direction, while they are applied to the rear wall of the heat-insulating housing 11 and the door 26 net-like coverage. The conduits 35 are like the channels 21 merged into a collection point and formed in the region of the rear wall of the housing to produce the net-like structure of short interconnected pipe sections. The pipes 35 are provided for the purpose of improved air flow at its pipe wall 36 with approximately uniformly over its Wandungsumfang and over its wall length arranged openings 37. The pipes 35 in the individual housing wall sections of the heat-insulating housing 11 are connected at their interface to the provided in the rear wall of the housing 11 reticulated pipe assembly with elastic or correspondingly shaped connecting elements to a contiguous duct or piping system, which centrally via an opening in the collection evacuation nozzle is sucked. The openings 37 in the pipe walls 36 are dimensioned so that the cross section is smaller than the cross section of the bulk material. For the pipes 35, it is conceivable that these are manufactured as prefabricated units made of different metals or of plastics with low diffusion and prior to filling the housing 11 or the door 26 with the formed as bulk heat insulating material in the intermediate space 15 and 28 respectively are inserted and then evacuation time optimized positioned. Furthermore, it is conceivable that in order to compensate for diffusion processes within the intermediate spaces 15 or 28 getter materials are inserted to compensate for the diffusion processes.

Claims (9)

  1. Thermally insulating housing (11, 26) for a thermally insulating useful space, arranged in an appliance, such as a domestic cooling appliance or freezing appliance (10), a domestic oven or the like, with a housing outer wall (12, 27), a housing inner wall (13, 27) spaced relative thereto, the walls together enclosing an intermediate space (15, 28) which can be evacuated by way of at least one connection point (24) and which is filled with an evacuatable thermal insulation material (16, 29) for supporting the walls (12, 13; 27) enclosing the intermediate space (15, 28), wherein provided within the intermediate space (15, 28) is a channel system which extends at least partly within the thermal insulation material (16, 29) and passes through the intermediate space (15, 28) to cover the area at least substantially and which is connected in terms of flow with an evacuating stub pipe (24), characterised in that for flow connection of the channel system with the evacuating stub pipe (24) there is provided at least one collecting point which is constructed as an antechamber (23) and which is disposed in ring-like manner and annularly surrounds the evacuating stub pipe (24).
  2. Thermally insulating housing according to claim 1, characterised in that the ends, which are on the side of the evacuating stub pipe, of the channel system composed of channels (21, 30) open into the collecting point serving for the flow connection of the channel system with the evacuating stub pipe (24).
  3. Thermally insulating housing according to claim 2, characterised in that the evacuating stub pipe (24) is arranged in the centre of the collecting point formed as an antechamber (23).
  4. Thermally insulating housing according to claim 1 or 2, characterised in that the channel system is composed of individual channels (21) and is formed at least partly in the thermal insulation material (16, 29).
  5. Thermally insulating housing according to one of claims 1 to 4, characterised in that the thermal insulation material (16, 29) is formed from open-cell, plate-shaped foamed material in which the channel system is formed by cutting.
  6. Thermally insulating housing according to claim 1 or 4, characterised in that the thermal insulation material is formed from glass-fibre mats in which the channel system is moulded.
  7. Thermally insulating housing according to claim 1 or 4, characterised in that the thermal insulation material is formed as an evacuatable filler material within which a prefabricated channel system composed of pipe ducts (35) is embedded.
  8. Thermally insulating housing according to claim 7, characterised in that the channel system composed of pipe ducts (35) is provided with passage openings (37) at least over a part of its duct length and its duct circumference.
  9. Thermally insulating housing according to claim 1, characterised in that the housing outer wall (12) and the housing inner wall (13) spaced therefrom are formed from a thin-walled, foil-like metal.
EP98100744A 1997-02-07 1998-01-16 Heat insulated housing Expired - Lifetime EP0857928B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9830466T SI0857928T1 (en) 1997-02-07 1998-01-16 Heat insulated housing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19704699A DE19704699A1 (en) 1997-02-07 1997-02-07 Insulated housing
DE19704699 1997-02-07

Publications (2)

Publication Number Publication Date
EP0857928A1 EP0857928A1 (en) 1998-08-12
EP0857928B1 true EP0857928B1 (en) 2003-04-16

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EP (1) EP0857928B1 (en)
DE (2) DE19704699A1 (en)
ES (1) ES2196405T3 (en)
SI (1) SI0857928T1 (en)
TR (1) TR199800181A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024713A1 (en) * 2008-05-22 2009-12-03 Carl Zeiss Industrielle Messtechnik Gmbh Cladding for a machine, in particular for a coordinate measuring machine

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DE20101177U1 (en) 2001-01-23 2001-04-12 RATIONAL AG, 86899 Landsberg Cooking appliance with inner box insulation layer
ITVA20020011A1 (en) * 2002-02-07 2003-08-07 Whirlpool Co DOMESTIC REFRIGERATOR AND PROCEDURE FOR ITS REALIZATION
AU2003228203A1 (en) * 2002-03-25 2003-10-08 Arcelik A.S. An insulated unit and production method thereof
US20040251192A1 (en) 2003-05-02 2004-12-16 Karl Fritze Crossflow filtration system with quick dry change elements
DE10355137A1 (en) * 2003-11-26 2005-06-23 BSH Bosch und Siemens Hausgeräte GmbH Refrigerator housing
DE102006057663A1 (en) * 2006-12-07 2008-06-12 Bayerische Motoren Werke Ag Thermal insulation layer arrangement and gas lance, insulation device and method for evacuating and / or gassing of the heat insulation layer arrangement
WO2018136055A1 (en) 2017-01-18 2018-07-26 Whirlpool Corporation Use of multiple port locations for achieving faster vacuum evacuation time in vacuum insulated structures
WO2018136054A1 (en) * 2017-01-18 2018-07-26 Whirlpool Corporation Use of rigid or permeable conduits for achieving faster vacuum evacuation time in vacuum insulated structures
EP3571451B1 (en) * 2017-01-18 2021-10-13 Whirlpool Corporation Increased vacuum port area for achieving faster vacuum evacuation time in vacuum insulated structures
US10746343B2 (en) 2018-09-28 2020-08-18 Whirlpool Corporation Channel system for a vacuum insulated structure

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GB730114A (en) * 1952-10-23 1955-05-18 Gen Electric Improvements in and relating to thermal insulation
DE3940649A1 (en) * 1989-12-08 1991-06-13 Asea Brown Boveri HEAT INSULATION DEVICE
SE470464B (en) * 1992-09-10 1994-04-18 Electrolux Res & Innovation Insulation for refrigerators or freezers
DE19528128A1 (en) * 1995-08-01 1997-02-06 Hoesch Siegerlandwerke Gmbh Sandwich components for creating heat-insulating and load-bearing walls, roofs and floors

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Publication number Priority date Publication date Assignee Title
DE102008024713A1 (en) * 2008-05-22 2009-12-03 Carl Zeiss Industrielle Messtechnik Gmbh Cladding for a machine, in particular for a coordinate measuring machine

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ES2196405T3 (en) 2003-12-16
TR199800181A3 (en) 1998-08-21
DE19704699A1 (en) 1998-08-13
TR199800181A2 (en) 1998-08-21
EP0857928A1 (en) 1998-08-12
SI0857928T1 (en) 2003-12-31
DE59807911D1 (en) 2003-05-22

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