WO2017005421A1 - A vacuum insulation panel - Google Patents

A vacuum insulation panel Download PDF

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Publication number
WO2017005421A1
WO2017005421A1 PCT/EP2016/062522 EP2016062522W WO2017005421A1 WO 2017005421 A1 WO2017005421 A1 WO 2017005421A1 EP 2016062522 W EP2016062522 W EP 2016062522W WO 2017005421 A1 WO2017005421 A1 WO 2017005421A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum insulation
core material
insulation panel
rice husk
household appliance
Prior art date
Application number
PCT/EP2016/062522
Other languages
French (fr)
Inventor
Yusuf YUSUFOGLU
Ceren ONEY
Kadir Erdogan
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2017005421A1 publication Critical patent/WO2017005421A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2509/00—Household appliances

Definitions

  • the present invention relates to a vacuum insulation panel whereof the production costs are reduced.
  • a vacuum insulation panel is produced by putting a porous core material into a membrane (outer protective envelope) exclusively or together with getter material that retains gas and moisture and an opaquing agent according to the characteristic of the core material, vacuuming and closing it by providing leak-proofing.
  • a membrane outer protective envelope
  • getter material that retains gas and moisture
  • an opaquing agent according to the characteristic of the core material
  • 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 rice husk ash as the opaquing agent.
  • the rice husk is one of the most important by-products generated while the rice is milled into white rice.
  • rice hull ash is generated as a by-product that is rich in SiO 2 (85%-98% by mass) and that can be industrially used.
  • SiO 2 in the rice husk does not have a homogeneous particle distribution
  • SiO 2 particles in the rice husk ash generated after the burning have a homogeneous structure.
  • the said structure of homogeneous particle distribution improves the heat insulation performance and the resistance of the vacuum insulation panel.
  • 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) 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 rice husk ash as the opaquing agent.
  • the rice husk ash containing a high ratio of silica improves the heat insulation of the vacuum insulation panel (1).
  • the vacuum insulation panels (1) with a thermal conductivity coefficient lower than 4 mW/m.K are obtained.
  • biologic opaquing agent the material cost of the vacuum insulation panel (1) is reduced.
  • the rice husk ash containing a high ratio of silica (approximately 20% of the weight of dry rice husk) is obtained by burning rice husks and separating them from the organic structures contained therein. In order to remove the metal ions and impurities of the rice husks, they are washed with deionized water and acid. Temperature and burning time affect the amount and purity of silica generated. It is experimentally observed that when the washed and dried rice husks are burned at temperatures between 600-900°C for 2 to 6 hours, they generate a by-product with the highest ratio of silica by weight.
  • the core material (2) comprises 5 % to 30 % rice husk ash by weight.
  • the core material (2) comprises rice husk ash as an opaquing agent with a density between 50 kg/m 3 and 70 kg/m 3 .
  • the thermal conductivity coefficient of the vacuum insulation panel (1) is reduced.
  • 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 insulation performance of the vacuum insulation panel (1) is improved and the production cost is decreased.
  • biological material as the opaquing agent, the amount of chemical materials, that are produced while destroying the vacuum insulation panel (1) and that are destroyed by being burned or buried into the ground, is decreased.

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

[Title established by the ISA under Rule 37.2] A VACUUM INSULATION PANEL
The present invention relates to a vacuum insulation panel whereof the production costs are reduced.
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 that retains gas and moisture and an opaquing agent according to the characteristic of the core material, vacuuming and closing it by providing leak-proofing. In the state of the art vacuum insulation panels, use of chemical materials such as SiC or carbon black as an opaquing agent in order to prevent heat transfer by radiation is known. However, since the costs of materials such as SiC or carbon black are high and the use of environmentally-friendly materials is preferred, it becomes critical to use alternative low-cost and environmentally-friendly materials.
In the state of the art United States Patent Document no. US4681788, the mixtures of precipitated silica and fly ash in different ratios are 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 rice husk ash as the opaquing agent. The rice husk is one of the most important by-products generated while the rice is milled into white rice. By industrially burning the rice husks at 700°C, rice hull ash is generated as a by-product that is rich in SiO2 (85%-98% by mass) and that can be industrially used. Although SiO2 in the rice husk does not have a homogeneous particle distribution, SiO2 particles in the rice husk ash generated after the burning have a homogeneous structure. The said structure of homogeneous particle distribution improves the heat insulation performance and the resistance of the vacuum insulation panel.
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) 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 rice husk ash as the opaquing agent. The rice husk ash containing a high ratio of silica improves the heat insulation of the vacuum insulation panel (1). By using the low-density and silica-based rice husk ash, the vacuum insulation panels (1) with a thermal conductivity coefficient lower than 4 mW/m.K are obtained. By using biologic opaquing agent, the material cost of the vacuum insulation panel (1) is reduced.
The rice husk ash containing a high ratio of silica (approximately 20% of the weight of dry rice husk) is obtained by burning rice husks and separating them from the organic structures contained therein. In order to remove the metal ions and impurities of the rice husks, they are washed with deionized water and acid. Temperature and burning time affect the amount and purity of silica generated. It is experimentally observed that when the washed and dried rice husks are burned at temperatures between 600-900°C for 2 to 6 hours, they generate a by-product with the highest ratio of silica by weight.
In an embodiment of the present invention, the core material (2) comprises 5 % to 30 % rice husk ash by weight.
In an embodiment of the present invention, the core material (2) comprises rice husk ash as an opaquing agent with a density between 50 kg/m3 and 70 kg/m3. Thus, by obtaining low-density vacuum insulation panels (1), the thermal conductivity coefficient of the vacuum insulation panel (1) is reduced.
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 means of the present invention, in particular by using rice husk ash as the opaquing agent, the insulation performance of the vacuum insulation panel (1) is improved and the production cost is decreased. By using biological material as the opaquing agent, the amount of chemical materials, that are produced while destroying the vacuum insulation panel (1) and that are destroyed by being burned or buried into the ground, is decreased.

Claims (8)

  1. A vacuum insulation panel (1) comprising open porous core material (2) and a barrier (3) that holds the core material (2) together, characterized by the core material (2) comprising rice husk ash as the opaquing agent.
  2. A vacuum insulation panel (1) as in Claim 1, characterized by the core material (2) comprising 5-30% rice husk ash by mass.
  3. A vacuum insulation panel (1) as in Claim 1 or Claim 2, characterized by the core material (2) comprising the rice husk ash with a density between 50 kg/m3 and 70 kg/m3.
  4. A household appliance, characterized by a body and/or a door comprising a vacuum insulation panel (1) as in any one of the above claims.
  5. A household appliance as in Claim 4, which is a cooling device.
  6. A household appliance as in Claim 4, which is an oven.
  7. A household appliance as in Claim 4, which is a laundry dryer.
  8. A household appliance as in Claim 4, which is a dishwasher.
PCT/EP2016/062522 2015-07-03 2016-06-02 A vacuum insulation panel WO2017005421A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2015/08292 2015-07-03
TR201508292 2015-07-03

Publications (1)

Publication Number Publication Date
WO2017005421A1 true WO2017005421A1 (en) 2017-01-12

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ID=56203314

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/062522 WO2017005421A1 (en) 2015-07-03 2016-06-02 A vacuum insulation panel

Country Status (1)

Country Link
WO (1) WO2017005421A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR683715A (en) * 1928-10-24 1930-06-17 Improvements in the manufacture of thermal and acoustic insulation and refractory materials
US4681788A (en) 1986-07-31 1987-07-21 General Electric Company Insulation formed of precipitated silica and fly ash
DE102006045451A1 (en) * 2006-09-19 2008-03-27 E.G.O. Elektro-Gerätebau GmbH Heat-insulating element for electric radiant heating elements, e.g. hot plates or rings, comprises pressed or sintered material containing pyrogenic silica and treated ash from burnt biological material, e.g. rice husks
CN102729316A (en) * 2012-07-10 2012-10-17 袁江涛 Preparation method of vacuum heat insulating plate
CN103343580A (en) * 2013-07-11 2013-10-09 陈秀凯 Method for manufacturing vacuum heat-insulating plates by utilization of coal ash and rice hull ash
CN103628580A (en) * 2012-08-23 2014-03-12 陕西亿丰绿色建筑材料有限公司 Production technology of vacuum thermal insulation board with five level of heat conduction resistance capacity
WO2015039843A1 (en) * 2013-09-18 2015-03-26 Wacker Chemie Ag Silicic acid mixtures and use thereof as insulation material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR683715A (en) * 1928-10-24 1930-06-17 Improvements in the manufacture of thermal and acoustic insulation and refractory materials
US4681788A (en) 1986-07-31 1987-07-21 General Electric Company Insulation formed of precipitated silica and fly ash
DE102006045451A1 (en) * 2006-09-19 2008-03-27 E.G.O. Elektro-Gerätebau GmbH Heat-insulating element for electric radiant heating elements, e.g. hot plates or rings, comprises pressed or sintered material containing pyrogenic silica and treated ash from burnt biological material, e.g. rice husks
CN102729316A (en) * 2012-07-10 2012-10-17 袁江涛 Preparation method of vacuum heat insulating plate
CN103628580A (en) * 2012-08-23 2014-03-12 陕西亿丰绿色建筑材料有限公司 Production technology of vacuum thermal insulation board with five level of heat conduction resistance capacity
CN103343580A (en) * 2013-07-11 2013-10-09 陈秀凯 Method for manufacturing vacuum heat-insulating plates by utilization of coal ash and rice hull ash
WO2015039843A1 (en) * 2013-09-18 2015-03-26 Wacker Chemie Ag Silicic acid mixtures and use thereof as insulation material

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