EP2881180B1 - Process for making a coating reducing condensation and ice build up - Google Patents

Process for making a coating reducing condensation and ice build up Download PDF

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Publication number
EP2881180B1
EP2881180B1 EP14196086.4A EP14196086A EP2881180B1 EP 2881180 B1 EP2881180 B1 EP 2881180B1 EP 14196086 A EP14196086 A EP 14196086A EP 2881180 B1 EP2881180 B1 EP 2881180B1
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EP
European Patent Office
Prior art keywords
solution
accordance
peroxide
polymer
exposure
Prior art date
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Not-in-force
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EP14196086.4A
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German (de)
French (fr)
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EP2881180A2 (en
EP2881180A3 (en
Inventor
Clemens Brummer
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Liebherr Hausgeraete Ochsenhausen GmbH
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Liebherr Hausgeraete Ochsenhausen GmbH
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Publication of EP2881180A3 publication Critical patent/EP2881180A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/04—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a surface receptive to ink or other liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2201/00—Polymeric substrate or laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation

Definitions

  • the present invention relates to a method for producing a coating of one or more surfaces of a refrigerator and / or freezer.
  • Cooling or freezing devices known from the prior art comprise a body with a cooled interior and a door, a lid or the like, with which the cooled interior can be closed.
  • the cooled interior is limited by the inner container and the inner wall of the closure element.
  • the refrigerated space are usually built-in elements, such as drawers or shelves or the like, which serve to receive or storage of refrigerated or frozen goods.
  • the DE 94 14 828 U1 discloses a refrigerator, in the refrigerated compartment, a container-like insert is inserted from a plastic film. To remove the ice, the insert can be easily removed as a result of the easily removable storage after removal of the goods and shaken out the ice.
  • the present invention is therefore based on the object to develop a method of the type mentioned in that the formation of ice and / or condensation on the surface of the device or a device component is prevented.
  • a coating of the surface is produced, which has the advantage that the formation of ice and preferably also the condensation of water at the surface is prevented.
  • the surface may be, for example, a polystyrene surface. It is preferably a plasma-activated surface and particularly preferably a plasma-activated polystyrene surface.
  • the exposure results in crosslinking of the polymer, and preferably also in its attachment to the surface or substrate surface, causing the desired cure.
  • the exposure may be, for example, UV exposure.
  • the polymer used is preferably a hydrophilic polymer.
  • the polymer used is preferably polyvinylpyrrolidone (hereinafter PVP).
  • H 2 O 2 is used as peroxide in a preferred embodiment of the invention.
  • no initiator such as a free radical initiator or a photoinitiator is used in the process.
  • the condensation of the water under icing conditions on the surface is prevented.
  • it can not come to an ice formation.
  • the solution is dried before exposure.
  • This drying preferably takes place at room temperature.
  • the exposure takes place under an inert gas atmosphere and / or in the absence of oxygen and / or under vacuum.
  • the oxygen exclusion may be generated, for example, by an inert gas atmosphere, e.g. by inert gases such as Ar, Kr, etc., or by other means, such as by covering the surface with a film that is transparent to the exposure.
  • the solution contains a solvent, preferably ethanol.
  • a solvent preferably ethanol.
  • Other organic or inorganic solvents are also suitable.
  • the use of water or of chloroform as solvent is conceivable.
  • a solution of the polymer, in particular of PVP by dissolving the polymer in a preferably hydrophilic solvent, for example in ethanol, and adding a peroxide such as H 2 O 2 to this solution.
  • a preferably hydrophilic solvent for example in ethanol
  • a peroxide such as H 2 O 2
  • the polymer such as PVP in a solvent which already contains the at least one peroxide such as H 2 O 2 .
  • the coating solution is applied to the respective substrate such as an icing-prone portion of the inner container, the surface of the evaporator, a sensor, or the like, then dried for some time, and finally by exposure to exposure such as ultraviolet irradiation cured at a wavelength in the range ⁇ 280 nm.
  • the solution is thus designed such that curing takes place by the action of the exposure.
  • the peroxide, in particular H 2 O 2 , which is added to the solution of the polymer, in particular PVP, in the solvent may be, for example, a 25-35% by weight or% by volume solution of the peroxide, preferably in water act.
  • the surface to be coated may be, for example, a polystyrene or polystyrene surface.
  • Polystyrene is merely an example that does not limit the invention. The use of other plastics or other surfaces is possible and encompassed by the invention.
  • the present invention furthermore relates to the use of a solution comprising at least one polymer, in particular polyvinylpyrrolidone, and at least one peroxide, in particular H 2 O 2 , as coating agent, which is used for application to one or more surfaces of a refrigerator and / or freezer.
  • a solution comprising at least one polymer, in particular polyvinylpyrrolidone, and at least one peroxide, in particular H 2 O 2 , as coating agent, which is used for application to one or more surfaces of a refrigerator and / or freezer.
  • This order serves to prevent the condensation of water and / or to prevent the formation of ice on the at least one surface.
  • the solution according to any one of claims 1 to 9 is treated or assembled.
  • the solution is first dried and then cured by exposure or irradiation.
  • the solution is used in a process according to any one of claims 1 to 9.
  • the present invention further relates to a refrigerator and / or freezer with at least one cooled interior, in which there is at least one surface, wherein the surface is at least partially provided with a coating, which is prepared according to one of claims 1 to 9.
  • the surface mentioned can be, for example, the surface of the inner container and / or the inner wall of the door or of another closure element and / or the surface of an element located in the cooled interior, in particular a storage shelf and / or a drawer.
  • Other elements of a refrigerator and / or freezer are included, such as sensors, lighting means and devices, electrical or electronic components, etc.
  • the surface, which is provided with the coating according to the invention from Polystyrene or polystyrene.
  • the solution prepared in this way is applied to said inner container wall or e.g. applied to a freezer compartment front and allowed to dry at room temperature.
  • the surface to which the solution is applied may be plasma activated.
  • the coating obtained in this way is a mechanically or externally stable and non-wipeable and not readily removable coating of the inner container wall.
  • This coating has the advantage that even under icing conditions (T ⁇ 0 ° C) neither condensation of water from the air nor icing of the coated surface takes place. The removal of ice can thus be dispensed with.
  • the present invention relates to any component of a refrigerator and / or freezer.
  • one or more components of the refrigerant circuit may be provided with the said coating.
  • the evaporator is considered. If its surface is provided with said coating, it is possible to prevent evaporator icing and thus a reduction in its efficiency.
  • thermosensors or other sensors may be considered or other electronic and electrical components, such as lighting devices and / or their bulbs.
  • the present invention it is possible to prevent the formation of ice without it being necessary to use specially provided films.
  • the coating of the invention can remain permanently on the surfaces, resulting in a correspondingly durable protection against icing.

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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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Beschichtung einer oder mehrerer Oberflächen eines Kühl- und/oder Gefriergerätes.The present invention relates to a method for producing a coating of one or more surfaces of a refrigerator and / or freezer.

Aus dem Stand der Technik bekannte Kühl- bzw. Gefriergeräte umfassen einen Korpus mit einem gekühlten Innenraum sowie eine Tür, einen Deckel oder dergleichen, womit der gekühlte Innenraum verschließbar ist.Cooling or freezing devices known from the prior art comprise a body with a cooled interior and a door, a lid or the like, with which the cooled interior can be closed.

Der gekühlte Innenraum wird durch den Innenbehälter sowie die Innenwand des Verschlusselementes begrenzt. Innerhalb des gekühlten Raumes befinden sich üblicherweise Einbauelemente, wie Schubladen oder Ablageböden oder dergleichen, die zur Aufnahme bzw. Ablage von Kühl- bzw. Gefriergut dienen.The cooled interior is limited by the inner container and the inner wall of the closure element. Within the refrigerated space are usually built-in elements, such as drawers or shelves or the like, which serve to receive or storage of refrigerated or frozen goods.

Bei derartigen Geräten besteht mitunter das Problem, dass die kalten Oberflächen der Geräte zur Kondensation und zur anschließenden Vereisung neigen. Die Vereisung beispielweise der Innenbehälterwandungen ist mit dem Nachteil verbunden, dass der Wärmedurchgang von dem gekühlten Innenraum zum Verdampfer durch eine Eisschicht behindert wird, wodurch die Effizienz des Gerätes entsprechend abnimmt. Entsprechendes gilt für die Vereisung eines Verdampfers. Um einem erhöhten Energieverbrauch entgegenzuwirken, werden daher die Eisschichten von Zeit zu Zeit automatisch oder manuell entfernt.In such devices, there is sometimes the problem that the cold surfaces of the devices tend to condensation and subsequent icing. The icing, for example, the inner container walls is associated with the disadvantage that the heat transfer from the cooled interior to the evaporator is hindered by an ice layer, whereby the efficiency of the device accordingly decreases. The same applies to the icing of an evaporator. To counteract increased energy consumption, the ice sheets are therefore removed automatically or manually from time to time.

Aus dem Stand der Technik gemäß der DE 196 53 574 A1 ist es bekannt, die Oberflächen eines Kühl- und/oder Gefriergerätes mit einer Folie oder mit einer Kunststoffbeschichtung zu überziehen, auf der eine Anhaftung des gebildeten Eises verhindert oder minimiert wird. Die Entfernung des gebildeten Eises wird auf diese Weise vereinfacht.From the prior art according to the DE 196 53 574 A1 It is known to coat the surfaces of a refrigerator and / or freezer with a film or with a plastic coating on which adhesion of the ice formed is prevented or minimized. The removal of the ice formed is simplified in this way.

Die DE 94 14 828 U1 offenbart ein Kühlgerät, in dessen Kühlfach ein behälterähnlicher Einsatz aus einer Kunststofffolie eingebracht ist. Zum Entfernen des Eises kann der Einsatz infolge der leicht lösbaren Lagerung nach der Entnahme des Gutes leicht entnommen und das Eis ausgeschüttelt werden.The DE 94 14 828 U1 discloses a refrigerator, in the refrigerated compartment, a container-like insert is inserted from a plastic film. To remove the ice, the insert can be easily removed as a result of the easily removable storage after removal of the goods and shaken out the ice.

Die Verwendungen derartiger Folien ist vergleichsweise aufwändig. Insbesondere ist es auch bei der Verwendung von Folien erforderlich, das Eis in bestimmten Zeitabständen zu entfernen.The uses of such films is comparatively expensive. In particular, it is also necessary when using films to remove the ice at certain intervals.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art dahingehend weiterzubilden, dass die Eisbildung und/oder die Kondensatbildung auf der Oberfläche des Gerätes bzw. eines Gerätebauteils verhindert wird.The present invention is therefore based on the object to develop a method of the type mentioned in that the formation of ice and / or condensation on the surface of the device or a device component is prevented.

Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a method having the features of claim 1.

Danach ist vorgesehen, dass das Verfahren die folgenden Schritte umfaßt:

  1. a) Aufbringen einer wenigstens ein Polymer und wenigstens ein Peroxid enthaltenden Lösung auf die zu beschichtende Oberfläche des Kühl- und/oder Gefriergerätes und
  2. b) Aushärten der aufgetragenen Lösung durch Belichtung mit einer Wellenlänge < 280 nm.
Thereafter, it is envisaged that the method comprises the following steps:
  1. a) applying a solution comprising at least one polymer and at least one peroxide to the surface of the refrigerator and / or freezer to be coated and
  2. b) curing the applied solution by exposure with a wavelength <280 nm.

Durch ein solches Verfahren wird eine Beschichtung der Oberfläche hergestellt, die den Vorteil mit sich bringt, dass die Eisbildung und vorzugsweise auch die Kondensation von Wasser an der Oberfläche verhindert wird.By such a method, a coating of the surface is produced, which has the advantage that the formation of ice and preferably also the condensation of water at the surface is prevented.

Bei der Oberfläche kann es sich beispielsweise um eine Polystyrol-Oberfläche handeln. Vorzugsweise handelt es sich um eine plasmaaktivierte Oberfläche und besonders bevorzugt um eine plasmaaktivierte Polystyrol-Oberfläche.The surface may be, for example, a polystyrene surface. It is preferably a plasma-activated surface and particularly preferably a plasma-activated polystyrene surface.

Die Belichtung hat eine Vernetzung des Polymers und vorzugsweise auch dessen Anbindung an die Oberfläche bzw. Substratoberfläche zur Folge, was die gewünschte Aushärtung bewirkt.The exposure results in crosslinking of the polymer, and preferably also in its attachment to the surface or substrate surface, causing the desired cure.

Bei der Belichtung kann es sich beispielsweise um UV-Belichtung handeln.The exposure may be, for example, UV exposure.

Als Polymer kommt vorzugsweise ein hydrophiles Polymer zum Einsatz.The polymer used is preferably a hydrophilic polymer.

Vorzugsweise wird als Polymer Polyvinylpyrrolidon (im Folgenden PVP) verwendet.The polymer used is preferably polyvinylpyrrolidone (hereinafter PVP).

Als Peroxid kommt in bevorzugter Ausgestaltung der Erfindung H2O2 zum Einsatz.As peroxide in a preferred embodiment of the invention H 2 O 2 is used.

Es besteht daher keine Notwendigkeit zur Abtauung von Eis oder zur manuellen Entfernung von Eisschichten. Vielmehr wird die Eisbildung von vornherein verhindert.There is therefore no need to defrost ice or to manually remove ice sheets. Rather, the formation of ice is prevented from the outset.

Auch wird vorzugsweise auf das Einbringen einer Folie verzichtet, was eine Vereinfachung der Herstellung des Gerätes mit sich bringt. Erfindungsgemäss kommt bei dem Verfahren kein Inititiator, wie z.B. ein Radikalstarter oder ein Photoinitiator zum Einsatz.Also, preferably dispensed with the introduction of a film, which brings a simplification of the production of the device with it. According to the invention, no initiator such as a free radical initiator or a photoinitiator is used in the process.

Vorzugsweise wird die Kondensation des Wassers unter vereisenden Bedingungen auf der Oberfläche verhindert. Somit kann es auch nicht zu einer Eisbildung kommen.Preferably, the condensation of the water under icing conditions on the surface is prevented. Thus, it can not come to an ice formation.

In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die Lösung vor der Belichtung getrocknet wird.In a preferred embodiment of the invention, it is provided that the solution is dried before exposure.

Diese Trocknung findet vorzugsweise bei Raumtemperatur statt.This drying preferably takes place at room temperature.

In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass die Belichtung unter einer Inertgasatmosphäre und/oder unter Sauerstoffausschluss und/oder unter Vakuum stattfindet. Der Sauerstoffausschluss kann beispielsweise durch eine Inertgasatmosphäre erzeugt werden, z.B. durch Inertgase wie Ar, Kr etc., oder auch durch andere Maßnahmen, wie beispielsweise durch die Abdeckung der Oberfläche mit einer Folie, die für die Belichtung durchlässig ist.In a preferred embodiment of the invention it is provided that the exposure takes place under an inert gas atmosphere and / or in the absence of oxygen and / or under vacuum. The oxygen exclusion may be generated, for example, by an inert gas atmosphere, e.g. by inert gases such as Ar, Kr, etc., or by other means, such as by covering the surface with a film that is transparent to the exposure.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass die Lösung ein Lösungsmittel, vorzugsweise Ethanol enthält. Auch andere organische oder auch anorganische Lösungsmittel kommen in Betracht. Denkbar ist beispielsweise der Einsatz von Wasser oder von Chloroform als Lösungsmittel.In a further embodiment of the invention, it is provided that the solution contains a solvent, preferably ethanol. Other organic or inorganic solvents are also suitable. For example, the use of water or of chloroform as solvent is conceivable.

Denkbar ist es beispielsweise eine Lösung des Polymers, insbesondere von PVP dadurch herzustellen, dass das Polymer in einem vorzugsweise hydrophilen Lösungsmittel, wie beispielsweise in Ethanol gelöst wird und dieser Lösung ein Peroxid, wie beispielsweise H2O2 zugesetzt wird. Grundsätzlich kann es sich statt Ethanol auch um ein anderes Lösungsmittel handeln, in dem das hydrophile PVP oder ein sonstiges Polymer löslich ist.It is conceivable, for example, to prepare a solution of the polymer, in particular of PVP, by dissolving the polymer in a preferably hydrophilic solvent, for example in ethanol, and adding a peroxide such as H 2 O 2 to this solution. In principle, instead of ethanol, it may also be another solvent in which the hydrophilic PVP or another polymer is soluble.

Auch ist es denkbar, das Polymer, wie PVP in einem Lösungsmittel in Lösung zu bringen, das bereits das wenigstens eine Peroxid, wie beispielsweise H2O2 enthält. Die Beschichtungslösung wird auf das jeweilige Substrat, wie beispielsweise auf einen zur Vereisung neigenden Bereich des Innenbehälters, auf die Oberfläche des Verdampfers, eines Sensors oder dergleichen aufgebracht, dann einige Zeit getrocknet und schließlich durch die Einwirkung der Belichtung, wie z.B. durch UV-Strahlung mit einer Wellenlänge im Bereich < 280 nm ausgehärtet.It is also conceivable to dissolve the polymer such as PVP in a solvent which already contains the at least one peroxide such as H 2 O 2 . The coating solution is applied to the respective substrate such as an icing-prone portion of the inner container, the surface of the evaporator, a sensor, or the like, then dried for some time, and finally by exposure to exposure such as ultraviolet irradiation cured at a wavelength in the range <280 nm.

Die Lösung ist somit derart ausgeführt, dass eine Aushärtung durch die Einwirkung der Belichtung erfolgt.The solution is thus designed such that curing takes place by the action of the exposure.

Bei dem Peroxid, insbesondere H2O2, das der Lösung des Polymers, insbesondere von PVP in dem Lösungsmittel zugesetzt wird, kann es sich beispielsweise um eine 25 - 35 Gew.-% oder Vol.-% Lösung des Peroxids, vorzugsweise in Wasser handeln.The peroxide, in particular H 2 O 2 , which is added to the solution of the polymer, in particular PVP, in the solvent may be, for example, a 25-35% by weight or% by volume solution of the peroxide, preferably in water act.

Bei der zu beschichtenden Oberfläche kann es sich beispielsweise um eine aus Polystyrol bestehende oder Polystyrol aufweisende Oberfläche handeln. Bei "Polystyrol" handelt es sich lediglich um ein die Erfindung nicht beschränkendes Beispiel. Auch die Verwendung anderer Kunststoffe bzw. anderer Oberflächen ist möglich und von der Erfindung mit umfasst.The surface to be coated may be, for example, a polystyrene or polystyrene surface. "Polystyrene" is merely an example that does not limit the invention. The use of other plastics or other surfaces is possible and encompassed by the invention.

Die vorliegende Erfindung betrifft des Weiteren die Verwendung einer wenigstens ein Polymer, insbesondere Polyvinylpyrrolidon, und wenigstens ein Peroxid, insbesondere H2O2 enthaltenden Lösung als Beschichtungsmittel, das zum Auftragen auf eine oder mehrere Oberflächen eines Kühl- und/oder Gefriergerätes dient. Dieser Auftrag dient zur Verhinderung der Kondensation von Wasser und/oder zur Verhinderung der Eisbildung auf der wenigstens einen Oberfläche.The present invention furthermore relates to the use of a solution comprising at least one polymer, in particular polyvinylpyrrolidone, and at least one peroxide, in particular H 2 O 2 , as coating agent, which is used for application to one or more surfaces of a refrigerator and / or freezer. This order serves to prevent the condensation of water and / or to prevent the formation of ice on the at least one surface.

In bevorzugter Ausgestaltung ist die Lösung gemäß einem der Ansprüche 1 bis 9 behandelt wird bzw. zusammengesetzt. Vorzugsweise ist somit vorgesehen, dass die Lösung zunächst getrocknet und dann durch Belichtung oder Bestrahlung aushärtet.In a preferred embodiment, the solution according to any one of claims 1 to 9 is treated or assembled. Preferably, it is thus provided that The solution is first dried and then cured by exposure or irradiation.

Vorzugsweise wird die Lösung in einem Verfahren gemäß einem der Ansprüche 1 bis 9 verwendet.Preferably, the solution is used in a process according to any one of claims 1 to 9.

Die vorliegende Erfindung betrifft des Weiteren ein Kühl- und/oder Gefriergerät mit wenigstens einem gekühlten Innenraum, in dem wenigstens eine Oberfläche vorliegt, wobei die Oberfläche wenigstens bereichsweise mit einer Beschichtung versehen ist, die gemäß einem der Ansprüche 1 bis 9 hergestellt ist. Bei der genannten Oberfläche kann es sich beispielsweise um die Oberfläche des Innenbehälters und/oder der Innenwand der Tür oder eines sonstigen Verschlusselementes und/oder um die Oberfläche eines in dem gekühlten Innenraum befindlichen Elementes, insbesondere eines Ablagebodens und/oder einer Schublade handeln. Auch andere Elemente eines Kühl- und/oder Gefriergerätes sind umfaßt, wie beispielsweise Sensoren, Beleuchtungsmittel und -einrichtungen, elektrische oder elektronische Bauteile etc. In einer denkbaren Ausgestaltung der Erfindung ist vorgesehen, dass die Oberfläche, die mit der erfindungsgemäßen Beschichtung versehen ist, aus Polystyrol besteht oder Polystyrol aufweist.The present invention further relates to a refrigerator and / or freezer with at least one cooled interior, in which there is at least one surface, wherein the surface is at least partially provided with a coating, which is prepared according to one of claims 1 to 9. The surface mentioned can be, for example, the surface of the inner container and / or the inner wall of the door or of another closure element and / or the surface of an element located in the cooled interior, in particular a storage shelf and / or a drawer. Other elements of a refrigerator and / or freezer are included, such as sensors, lighting means and devices, electrical or electronic components, etc. In a conceivable embodiment of the invention it is provided that the surface, which is provided with the coating according to the invention, from Polystyrene or polystyrene.

Weitere Einzelheiten und Vorteile der Erfindung werden anhand eines im Folgenden beschriebenen Ausführungsbeispiels näher erläutert:

  • Auf eine Oberfläche eines Kühl- bzw. Gefriergerätes, beispielsweise auf den gefrierraumseitige Seite des Innenbehälters des Gefrierfaches wird eine Lösung aufgetragen, die wie folgt hergestellt wird:
    • Das hydrophile Polymer PVP wird in Ethanol gelöst und dieser Lösung wird 30 Gew. %iges H2O2 zugesetzt. Die Lösung kann beispielsweise folgende Zusammensetzung haben:
      • PVP 360'000 g/mol 7,0 Gew.-%
      • Ethanol unvergällt 81,4 Gew.-%
      • H2O2 (30 Gew.-% ig) 11,6 Gew.-%
Further details and advantages of the invention will be explained in more detail with reference to an embodiment described below:
  • On a surface of a refrigerator, for example on the freezer-side side of the inner container of the freezer, a solution is applied, which is prepared as follows:
    • The hydrophilic polymer PVP is dissolved in ethanol and to this solution is added 30% by weight H 2 O 2 . The solution may, for example, have the following composition:
      • PVP 360,000 g / mol 7.0% by weight
      • Ethanol not yellow 81.4% by weight
      • H 2 O 2 (30% by weight) 11.6% by weight

Die auf diese Weise hergestellte Lösung wird auf die genannte Innenbehälterwandung oder z.B. auf eine Gefrierfachfront aufgetragen und bei Raumtemperatur trocknen gelassen. Die Oberfläche, auf die die Lösung aufgetragen wird, kann plasmaaktiviert sein.The solution prepared in this way is applied to said inner container wall or e.g. applied to a freezer compartment front and allowed to dry at room temperature. The surface to which the solution is applied may be plasma activated.

Nach der Trocknung erfolgt die Beaufschlagung der Beschichtung beispielsweise durch UV-Bestrahlung, was zur Folge hat, dass die Beschichtung aushärtet. Die auf diese Weise erhaltene Beschichtung ist eine mechanisch bzw. gegen äußere Einwirkungen stabile und nicht abwischbare und nicht ohne weiteres entfernbare Beschichtung der Innenbehälterwand.After drying, the application of the coating takes place for example by UV irradiation, with the result that the coating cures. The coating obtained in this way is a mechanically or externally stable and non-wipeable and not readily removable coating of the inner container wall.

Diese Beschichtung hat den Vorteil, dass selbst unter vereisenden Bedingungen (T < 0 °C) weder eine Kondensation von Wasser aus der Luft noch eine Vereisung der beschichteten Oberfläche stattfindet. Auf die Entfernung von Eis kann somit verzichtet werden.This coating has the advantage that even under icing conditions (T <0 ° C) neither condensation of water from the air nor icing of the coated surface takes place. The removal of ice can thus be dispensed with.

Die vorliegende Erfindung bezieht sich auf jedes beliebige Bauteil eines Kühl- und/oder Gefriergerätes.The present invention relates to any component of a refrigerator and / or freezer.

So können mit der genannten Beschichtung auch eine oder mehrere Komponenten des Kältemittelkreislaufes versehen sein. In Betracht kommt beispielsweise der Verdampfer. Wird dessen Oberfläche mit der genannten Beschichtung versehen, kann eine Verdampfervereisung und damit eine Verringerung von dessen Effizienz verhindert werden.Thus, one or more components of the refrigerant circuit may be provided with the said coating. For example, the evaporator is considered. If its surface is provided with said coating, it is possible to prevent evaporator icing and thus a reduction in its efficiency.

Auch Bauteile, bei denen die Eisbildung zu einer Beschädigung oder gar zu einem Funktionsausfall führen kann, können mit der genannten Beschichtung versehen sein, um von vornherein eine Eisbildung zu verhindern. In Betracht kommen beispielsweise Temperatur- oder Luftfeuchtigkeitssensoren oder sonstige Sensoren oder andere elektronische und elektrische Bauteile, wie beispielsweise Beleuchtungseinrichtungen und/oder deren Leuchtmittel.Even components in which the formation of ice can lead to damage or even to a malfunction can be provided with said coating in order to prevent the formation of ice from the outset. For example, temperature or humidity sensors or other sensors may be considered or other electronic and electrical components, such as lighting devices and / or their bulbs.

Durch die vorliegende Erfindung ist es möglich, die Eisbildung zu verhindern, ohne dass eigens dafür vorgesehene Folien verwendet werden müssen. Die erfindungsgemäße Beschichtung kann dauerhaft auf den Oberflächen verbleiben, wodurch sich entsprechend ein dauerhafter Schutz vor Vereisung ergibt.By means of the present invention, it is possible to prevent the formation of ice without it being necessary to use specially provided films. The coating of the invention can remain permanently on the surfaces, resulting in a correspondingly durable protection against icing.

Claims (9)

  1. A method of manufacturing a coating of one or more surfaces of a refrigerating unit and/or freezer unit,
    characterized in that
    the method comprises the following steps: applying a solution without initiator and including at least one polymer and at least one peroxide to the surface of the refrigerating unit and/or freezer unit to be coated and hardening the applied solution by exposure to a wavelength < 280 nm.
  2. A method in accordance with claim 1 or claim 2, characterized in that the polymer is polyvinylpyrrolidone; and/or in that the peroxide is H2O2.
  3. A method in accordance with one of the preceding claims, characterized in that the solution is dried before the exposure or the irradiation.
  4. A method in accordance with claim 3, characterized in that the drying takes place at room temperature.
  5. A method in accordance with one of the preceding claims, characterized in that the exposure or irradiation takes place under an inert gas atmosphere and/or to the exclusion of oxygen and/or in a vacuum.
  6. A method in accordance with one of the preceding claims, characterized in that the solution includes a solvent, preferably ethanol, water or chloroform.
  7. A method in accordance with one of the preceding claims, characterized in that the solution is obtained in that the polymer, in particular polyvinylpyrrolidone, is dissolved in a solvent, in particular in ethanol, water or chloroform; and in that the peroxide, in particular H2O2, is admixed to this solution.
  8. A method in accordance with claim 7, characterized in that the admixed peroxide is a 25 - 35% solution of the peroxide, preferably in water.
  9. A method in accordance with one of the preceding claims, characterized in that the surface to be coated is a surface consisting of polystyrene or comprising polystyrene.
EP14196086.4A 2013-12-04 2014-12-03 Process for making a coating reducing condensation and ice build up Not-in-force EP2881180B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013020692 2013-12-04
DE102014006907.9A DE102014006907A1 (en) 2013-12-04 2014-05-09 Process for the preparation of a coating

Publications (3)

Publication Number Publication Date
EP2881180A2 EP2881180A2 (en) 2015-06-10
EP2881180A3 EP2881180A3 (en) 2015-06-24
EP2881180B1 true EP2881180B1 (en) 2017-11-29

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DE (1) DE102014006907A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639524A (en) * 1969-07-28 1972-02-01 Maurice Seiderman Hydrophilic gel polymer insoluble in water from polyvinylpyrrolidone with n-vinyl-2-pyrrolidone and methacrylic modifier
DE9414828U1 (en) 1994-09-13 1994-11-03 Schreiber, Heinrich, 74629 Pfedelbach De-icing device for freezers
DE29600041U1 (en) 1996-01-03 1996-02-29 Schreiber, Heinrich, 74629 Pfedelbach De-icing equipment for freezers
FR2910117A1 (en) * 2006-12-18 2008-06-20 Saint Gobain Detecting a door malfunction in a refrigerated enclosure, e.g. freezer, comprises depositing an anti-icing adsorbent layer on a window in the door
EP2674226A3 (en) * 2012-06-14 2015-02-11 Liebherr-Hausgeräte Ochsenhausen GmbH Method for manufacturing a coating

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2881180A2 (en) 2015-06-10
DE102014006907A1 (en) 2015-06-11
EP2881180A3 (en) 2015-06-24

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