EP3175054A1 - A vacuum insulation panel with increased insulation effectiveness - Google Patents

A vacuum insulation panel with increased insulation effectiveness

Info

Publication number
EP3175054A1
EP3175054A1 EP15729091.7A EP15729091A EP3175054A1 EP 3175054 A1 EP3175054 A1 EP 3175054A1 EP 15729091 A EP15729091 A EP 15729091A EP 3175054 A1 EP3175054 A1 EP 3175054A1
Authority
EP
European Patent Office
Prior art keywords
core material
vacuum insulation
insulation panel
pulverized
sunflower stalks
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.)
Withdrawn
Application number
EP15729091.7A
Other languages
German (de)
French (fr)
Inventor
Yusuf YUSUFOGLU
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3175054A1 publication Critical patent/EP3175054A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E04B1/803—Heat insulating elements slab-shaped with vacuum spaces included in the slab
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4209—Insulation arrangements, e.g. for sound damping or heat insulation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00965—Uses not provided for elsewhere in C04B2111/00 for household applications, e.g. use of materials as cooking ware
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742—Use of special materials; Materials having special structures or shape
    • E04B2001/745—Vegetal products, e.g. plant stems, barks
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/242—Slab shaped vacuum insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a vacuum insulation panel.
  • a vacuum insulation panel is produced by putting a porous core material into a membrane (outer protective envelope) exclusively or together with getter material according to the characteristic of the core material, vacuuming and closing it by providing leak-proofing.
  • the gas pressure is enabled to be decreased by reducing the number of gas molecules in the environment.
  • materials such as precipitated silica, fumed silica, aerogel, fiberglass, open-cell extruded polystyrene and open-cell polyurethane, etc. are used as the core material.
  • silica is the widely preferred material due to its low thermal conductivity coefficient.
  • the silica is a non-biodegradable material with high production costs.
  • the aim of the present invention is the realization of a vacuum insulation panel, the cost of which is decreased without changing the insulation effectiveness.
  • the vacuum insulation panel realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof is produced by vacuuming and pressing an open-porous core material placed into a barrier to prevent scattering.
  • the core material of the present invention comprises pulverized sunflower stalks.
  • the sunflower stalk with a porous structure is an isolating material. Consequently, a vacuum insulation panel is realized with high insulation property, having a biological core material.
  • the core material consists of the mixture of fumed silica and pulverized sunflower stalks.
  • the fumed silica with low density and small pore diameter is preferred since the thermal conductivity coefficient is low.
  • the core material consists of the mixture of precipitated silica and pulverized sunflower stalks.
  • Precipitated silica is an alternative material that is cheaper than fumed silica and has thermal conductivity values close to fumed silica.
  • the core material consists of the mixture of open cell polyurethane and pulverized sunflower stalks.
  • the core material consists of the mixture of open cell polyurethane, silica and pulverized sunflower stalks.
  • the core material comprises 15 % to 90 % pulverized sunflower stalks by weight. In this embodiment, 85 % to 10 % fumed silica or precipitated silica is used As the mass ratio of sunflower stalk in the core material increases, the thermal conductivity coefficient of the core material increases. Therefore, sunflower stalk is used by mixing with open cell polyurethane and/or silica having lower thermal conductivity values.
  • Figure 1 – is the schematic view of a vacuum insulation panel of the present invention.
  • the vacuum insulation panel (1) comprises a core material (2) with open porous structure and a barrier (3) that holds the core material (2) together.
  • the open porous core material (2) is filled into a barrier (3) preferably together with a getter material, depending on the material properties forming the core material (2) and vacuumed.
  • a vacuum insulation panel (1) is realized comprising the open porous core material (2) having low thermal conductivity coefficient, with increased insulation effectiveness.
  • the core material (2) of the present invention comprises pulverized sunflower stalks with decreased particle size.
  • the porous sunflower stalk having low density reaches very low thermal conductivity coefficient values (approximately 4.5 mW/m.K) when vacuumed by decreasing the particle size.
  • very low thermal conductivity coefficient values approximately 4.5 mW/m.K
  • the core material (2) consists of the mixture of fumed silica and pulverized sunflower stalks.
  • the core material (2) consists of the mixture of precipitated silica and pulverized sunflower stalks.
  • the core material (2) consists of the mixture of open cell polyurethane and pulverized sunflower stalks.
  • the core material (2) consists of the mixture of open cell polyurethane, silica and pulverized sunflower stalks.
  • the core material (2) comprises 15 % to 90 % pulverized sunflower stalks by weight.
  • the thermal conductivity coefficient of the core material (2) increases. While the thermal conductivity coefficient of a core material (2) comprising 30 % pulverized sunflower stalks and 70 % fumed silica by weight is 4.6 mW/m.K, the thermal conductivity coefficient of a core material (2) comprising 90 % pulverized sunflower stalks and 10 % silica by weight is 5.8 mW/m.K.
  • the insulation performance of a vacuum insulation panel (1) comprising 90 % pulverized sunflower stalks remains between admissible performance values. Consequently, while the insulation performance of the vacuum insulation panel (1) is maintained, the product cost is decreased.
  • the core material (2) comprises % 85 to 10 % fumed silica by weight. Fumed silica and sunflower stalks are mixed homogeneously, filled into the barrier (3), then vacuumed and thus the vacuum insulation panel (1) is obtained.
  • the core material (2) comprises sunflower stalks that are pulverized so that the particle size thereof is between 5 nanometers and 50 nanometers. As the particle size gets smaller, the thermal conductivity coefficient of sunflower stalk decreases and conductivity of the vacuum insulation panel (1) decreases. Thus, the thermal conductivity value of the vacuum insulation panel (1) can be adjusted by changing the particle size distribution and the porous structure of the sunflower stalk.
  • the core material (2) comprises pulverized sunflower stalk having density between 70 kg/m 3 and 90 kg/m 3 .
  • the porous structure of the sunflower stalk is changed and density of the material can be adjusted.
  • the thermal conductivity value of the vacuum insulation panel (1) decreases and the insulation performance is improved.
  • the core material (2) comprises cellulosic fiber approximately 10 % by weight.
  • the pulverized sunflower stalks are mixed with other core materials.
  • the sunflower stalks are dispersed homogeneously inside the mixture and form net/plate shape by integrating with each other.
  • the core material (2) comprises fiberglass approximately 10 % by weight.
  • Fiberglass is a material alternative to cellulosic fiber, it prevents agglomeration of sunflower stalks with decreased particle size and provides easy homogeneous dispersion in the core material (2).
  • the core material (2) comprises a getter material that is suitable to the chemical structure of the core material (2).
  • a getter material that is suitable to the chemical structure of the core material (2). In the case gas and/or moisture leaks into the vacuum insulation panel (1) from the outside environment, it is absorbed by means of the getter and the pressure inside the vacuum insulation panel (1) is prevented from rising.
  • the vacuum insulation panel (1) is suitable to be used inside the door and/or the body of a household appliance.
  • the household appliance is a cooling device.
  • the household appliance is an oven.
  • the household appliance is a laundry dryer
  • the household appliance is a dishwasher.
  • the product and manufacturing costs of the vacuum insulation panels (1) are decreased by means of the core material (2) comprising biological material used in the vacuum insulation panels (1). Furthermore, environmental pollution is prevented and natural resources are utilized by using biodegradable and renewable biological materials instead of chemical materials.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Insulation (AREA)

Abstract

The present invention relates to a vacuum insulation panel (1) comprising a core material (2) with open porous structure and a barrier (3) that holds the core material (2) together. The open porous core material (2) is filled into a barrier (3) preferably together with a getter material, depending on the material properties forming the core material (2) and vacuumed. Thus, a vacuum insulation panel (1) is realized comprising the open porous core material (2) having low thermal conductivity coefficient, with increased insulation effectiveness.

Description

    A VACUUM INSULATION PANEL WITH INCREASED INSULATION EFFECTIVENESS
  • The present invention relates to a vacuum insulation panel.
  • Nowadays vacuum insulation panels are used in various fields since they have better performance with respect to the conventional insulation materials and since they provide better thermal resistance by using the insulating feature of the vacuum. Basically, a vacuum insulation panel is produced by putting a porous core material into a membrane (outer protective envelope) exclusively or together with getter material according to the characteristic of the core material, vacuuming and closing it by providing leak-proofing. In the vacuum insulation panels, in order to obtain the vacuum effect, the gas pressure is enabled to be decreased by reducing the number of gas molecules in the environment. In the state of the art, materials such as precipitated silica, fumed silica, aerogel, fiberglass, open-cell extruded polystyrene and open-cell polyurethane, etc. are used as the core material. Among these materials, silica is the widely preferred material due to its low thermal conductivity coefficient. However, the silica is a non-biodegradable material with high production costs.
  • In the state of the art United States Patent Document No. US4681788, the mixture of precipitated silica and fly ash in different ratios is used as the core material of the vacuum insulation panel.
  • The aim of the present invention is the realization of a vacuum insulation panel, the cost of which is decreased without changing the insulation effectiveness.
  • The vacuum insulation panel realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof is produced by vacuuming and pressing an open-porous core material placed into a barrier to prevent scattering. The core material of the present invention comprises pulverized sunflower stalks. The sunflower stalk with a porous structure is an isolating material. Consequently, a vacuum insulation panel is realized with high insulation property, having a biological core material.
  • In an embodiment of the present invention, the core material consists of the mixture of fumed silica and pulverized sunflower stalks. The fumed silica with low density and small pore diameter is preferred since the thermal conductivity coefficient is low.
  • In an embodiment of the present invention, the core material consists of the mixture of precipitated silica and pulverized sunflower stalks. Precipitated silica is an alternative material that is cheaper than fumed silica and has thermal conductivity values close to fumed silica.
  • In an embodiment of the present invention, the core material consists of the mixture of open cell polyurethane and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material consists of the mixture of open cell polyurethane, silica and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material comprises 15 % to 90 % pulverized sunflower stalks by weight. In this embodiment, 85 % to 10 % fumed silica or precipitated silica is used As the mass ratio of sunflower stalk in the core material increases, the thermal conductivity coefficient of the core material increases. Therefore, sunflower stalk is used by mixing with open cell polyurethane and/or silica having lower thermal conductivity values.
  • A vacuum insulation panel realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
  • Figure 1 – is the schematic view of a vacuum insulation panel of the present invention.
  • The elements illustrated in the figures are numbered as follows:
    1. Vacuum insulation panel
    2. Core material
    3. Barrier
  • The vacuum insulation panel (1) comprises a core material (2) with open porous structure and a barrier (3) that holds the core material (2) together. The open porous core material (2) is filled into a barrier (3) preferably together with a getter material, depending on the material properties forming the core material (2) and vacuumed. Thus, a vacuum insulation panel (1) is realized comprising the open porous core material (2) having low thermal conductivity coefficient, with increased insulation effectiveness.
  • The core material (2) of the present invention comprises pulverized sunflower stalks with decreased particle size. The porous sunflower stalk having low density reaches very low thermal conductivity coefficient values (approximately 4.5 mW/m.K) when vacuumed by decreasing the particle size. Thus, when the sunflower stalk that is a low cost and biodegradable material is used in the production of the vacuum insulation panel (1), the production cost is decreased without changing the insulation performance of the vacuum insulation panel (1) and eco-friendly products are obtained.
  • In an embodiment of the present invention, the core material (2) consists of the mixture of fumed silica and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material (2) consists of the mixture of precipitated silica and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material (2) consists of the mixture of open cell polyurethane and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material (2) consists of the mixture of open cell polyurethane, silica and pulverized sunflower stalks.
  • In an embodiment of the present invention, the core material (2) comprises 15 % to 90 % pulverized sunflower stalks by weight. As the mass ratio of sunflower stalk in the core material (2) increases, the thermal conductivity coefficient of the core material (2) increases. While the thermal conductivity coefficient of a core material (2) comprising 30 % pulverized sunflower stalks and 70 % fumed silica by weight is 4.6 mW/m.K, the thermal conductivity coefficient of a core material (2) comprising 90 % pulverized sunflower stalks and 10 % silica by weight is 5.8 mW/m.K. The insulation performance of a vacuum insulation panel (1) comprising 90 % pulverized sunflower stalks remains between admissible performance values. Consequently, while the insulation performance of the vacuum insulation panel (1) is maintained, the product cost is decreased.
  • In a derivative of this embodiment, the core material (2) comprises % 85 to 10 % fumed silica by weight. Fumed silica and sunflower stalks are mixed homogeneously, filled into the barrier (3), then vacuumed and thus the vacuum insulation panel (1) is obtained.
  • In an embodiment of the present invention, the core material (2) comprises sunflower stalks that are pulverized so that the particle size thereof is between 5 nanometers and 50 nanometers. As the particle size gets smaller, the thermal conductivity coefficient of sunflower stalk decreases and conductivity of the vacuum insulation panel (1) decreases. Thus, the thermal conductivity value of the vacuum insulation panel (1) can be adjusted by changing the particle size distribution and the porous structure of the sunflower stalk.
  • In an embodiment of the present invention, the core material (2) comprises pulverized sunflower stalk having density between 70 kg/m3 and 90 kg/m3. During the pulverization operation, the porous structure of the sunflower stalk is changed and density of the material can be adjusted. As the density of the sunflower stalk, hence the core material (2) decreases, the thermal conductivity value of the vacuum insulation panel (1) decreases and the insulation performance is improved.
  • In an embodiment of the present invention, the core material (2) comprises cellulosic fiber approximately 10 % by weight. After being mixed with natural fibers such as wood fiber that enables the sunflower stalks to concrete by serving as a binding agent, the pulverized sunflower stalks are mixed with other core materials. By means of the said fibers, the sunflower stalks are dispersed homogeneously inside the mixture and form net/plate shape by integrating with each other.
  • In an embodiment of the present invention, the core material (2) comprises fiberglass approximately 10 % by weight. Fiberglass is a material alternative to cellulosic fiber, it prevents agglomeration of sunflower stalks with decreased particle size and provides easy homogeneous dispersion in the core material (2).
  • In an embodiment of the present invention, the core material (2) comprises a getter material that is suitable to the chemical structure of the core material (2). In the case gas and/or moisture leaks into the vacuum insulation panel (1) from the outside environment, it is absorbed by means of the getter and the pressure inside the vacuum insulation panel (1) is prevented from rising.
  • In an embodiment of the present invention, the vacuum insulation panel (1) is suitable to be used inside the door and/or the body of a household appliance.
  • In a derivative of this embodiment, the household appliance is a cooling device.
  • In a derivative of this embodiment, the household appliance is an oven.
  • In a derivative of this embodiment, the household appliance is a laundry dryer
  • In a derivative of this embodiment, the household appliance is a dishwasher.
  • By the present invention, the product and manufacturing costs of the vacuum insulation panels (1) are decreased by means of the core material (2) comprising biological material used in the vacuum insulation panels (1). Furthermore, environmental pollution is prevented and natural resources are utilized by using biodegradable and renewable biological materials instead of chemical materials.

Claims (15)

  1. A vacuum insulation panel (1) comprising open porous core material (2) and a barrier (3) that holds the core material (2) together and characterized by the core material (2) comprising pulverized sunflower stalks.
  2. A vacuum insulation panel (1) as in Claim 1, characterized by the core material (2) formed from the mixture of fumed silica and pulverized sunflower stalks.
  3. A vacuum insulation panel (1) as in Claim 1, characterized by the core material (2) formed from the mixture of precipitated silica and pulverized sunflower stalks.
  4. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) formed from the mixture of open cell polyurethane and pulverized sunflower stalks.
  5. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) comprising 15 % to 90 % pulverized sunflower stalks by weight.
  6. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) comprising sunflower stalks pulverized so that that the particle size thereof is between 5 nanometers and 50 nanometers.
  7. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) comprising pulverized sunflower stalks having density within the range of 70 kg/m3 and 90 kg/m3 .
  8. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) comprising approximately 10 % cellulosic fiber by weight.
  9. A vacuum insulation panel (1) as in any one of the Claims 1 to 7, characterized by the core material (2) comprising approximately 10 % fiberglass by weight.
  10. A vacuum insulation panel (1) as in any one of the above claims, characterized by the core material (2) comprising a getter material.
  11. A household appliance comprising a body and a door, characterized by the body and/or the door comprising a vacuum insulation panel (1) as in any one of the above claims.
  12. A household appliance as in Claim 11, which is a cooling device.
  13. A household appliance as in Claim 11, which is an oven.
  14. A household appliance as in Claim 11, which is a laundry dryer.
  15. A household appliance as in Claim 11, which is a dishwasher.
EP15729091.7A 2014-07-31 2015-05-28 A vacuum insulation panel with increased insulation effectiveness Withdrawn EP3175054A1 (en)

Applications Claiming Priority (2)

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TR201408965 2014-07-31
PCT/EP2015/061843 WO2016015899A1 (en) 2014-07-31 2015-05-28 A vacuum insulation panel with increased insulation effectiveness

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Publication number Priority date Publication date Assignee Title
WO2018001492A1 (en) * 2016-06-30 2018-01-04 Arcelik Anonim Sirketi A vacuum insulation panel with improved assemblage
CN115677270B (en) * 2022-11-07 2024-07-12 厦门大学 Ultralight aerogel-based vacuum insulation panel and preparation method thereof
CN117683368A (en) * 2023-12-12 2024-03-12 福建商学院 A bamboo powder-based porous composite material and its application

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US4681788A (en) 1986-07-31 1987-07-21 General Electric Company Insulation formed of precipitated silica and fly ash
GB9312868D0 (en) * 1993-06-22 1993-08-04 Ici Plc Microvoid polyurethane materials
AU6892394A (en) * 1994-01-06 1995-07-13 Kenneth Lindsay Pagden Insulative materials and products
FR2976298B1 (en) * 2011-06-09 2014-08-22 A P C A Assemblee Permanente Des Chambres D Agriculture PROTECTIVE AND / OR COMBUSTION MATERIAL FROM CELLULOSIC PLANT MATERIAL AND METHOD OF MANUFACTURING THE SAME
DE202011050486U1 (en) * 2011-06-19 2011-10-13 Viktor Schatz insulating element
CN102615871B (en) * 2012-04-11 2014-06-25 青岛科瑞新型环保材料有限公司 Method for using agricultural waste to produce vacuum insulation boards
CN102979207B (en) * 2012-11-12 2014-12-10 安徽科瑞克保温材料有限公司 Modified cement polystyrene particle composite vacuum insulation board and preparation method thereof

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