WO2005061946A1 - 真空断熱材、および、それを用いた冷凍機器 - Google Patents
真空断熱材、および、それを用いた冷凍機器 Download PDFInfo
- Publication number
- WO2005061946A1 WO2005061946A1 PCT/JP2004/012320 JP2004012320W WO2005061946A1 WO 2005061946 A1 WO2005061946 A1 WO 2005061946A1 JP 2004012320 W JP2004012320 W JP 2004012320W WO 2005061946 A1 WO2005061946 A1 WO 2005061946A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- heat insulating
- insulating material
- vacuum heat
- core material
- fibers
- Prior art date
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- 239000011810 insulating material Substances 0.000 title claims abstract description 82
- 239000011162 core material Substances 0.000 claims abstract description 87
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 34
- 230000009878 intermolecular interaction Effects 0.000 claims abstract description 19
- 229910008051 Si-OH Inorganic materials 0.000 claims abstract description 17
- 229910006358 Si—OH Inorganic materials 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 79
- 238000009413 insulation Methods 0.000 claims description 29
- 238000005452 bending Methods 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 21
- 239000012774 insulation material Substances 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008014 freezing Effects 0.000 claims 1
- 238000007710 freezing Methods 0.000 claims 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 abstract description 10
- 229910018557 Si O Inorganic materials 0.000 abstract description 5
- 239000011230 binding agent Substances 0.000 description 33
- 239000010410 layer Substances 0.000 description 25
- 238000001228 spectrum Methods 0.000 description 24
- 239000007787 solid Substances 0.000 description 21
- 239000010408 film Substances 0.000 description 16
- 239000011491 glass wool Substances 0.000 description 15
- 229920001169 thermoplastic Polymers 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 13
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 11
- 239000006260 foam Substances 0.000 description 11
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- 230000002378 acidificating effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002657 fibrous material Substances 0.000 description 5
- 239000005001 laminate film Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- 239000003463 adsorbent Substances 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- 239000004327 boric acid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- VCNTUJWBXWAWEJ-UHFFFAOYSA-J aluminum;sodium;dicarbonate Chemical compound [Na+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O VCNTUJWBXWAWEJ-UHFFFAOYSA-J 0.000 description 1
- -1 and hydrated talcite Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229910001647 dawsonite Inorganic materials 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011104 metalized film Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004001 molecular interaction Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- E04B2001/7687—Crumble resistant fibrous blankets or panels using adhesives or meltable fibres
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1314—Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/231—Filled with gas other than air; or under vacuum
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
Definitions
- the present invention relates to a vacuum heat insulating material, and a refrigerator and a refrigerator using the vacuum heat insulating material.
- a fibrous body such as glass wool or a foam such as urethane foam is used as the heat insulating material.
- a fibrous body such as glass wool or a foam such as urethane foam is used as the heat insulating material.
- a vacuum heat insulating material composed of a core material for holding a space and a jacket material for shutting off the space and the outside air.
- the core material powder materials, fiber materials, interconnected foams, etc. are generally used, but with the increasing demand for energy savings in recent years, higher-performance vacuum insulation materials have been required.
- heat conduction is represented by the sum of gas heat conduction, solid heat conduction, radiant heat conduction, and convective heat conduction.
- gas heat conduction and convective heat conduction are almost negligible.
- radiant heat conduction hardly contributes.
- Japanese Unexamined Patent Publication (Kokai) No. 11-5066708 discloses a low melting glass composition and boric acid.
- a vacuum heat insulating material using, as a core material, an aggregate of fiber materials in which an inorganic binder material having thermoplastic properties as described above is diffused throughout the fiber material is disclosed.
- the fiber material of the conventional example is characterized in that two adjacent glass fibers 1 and 2 are fixed by an inorganic binder material 3 at an intersection 4 via a binder 5. I do.
- an inorganic binder material as the binder, the individual fibers of the fiber aggregate are held together and formed into aggregates to maintain a formed product such as a blanket, mat, insulation, or panel of insulating material. It discloses that it can be integrated.
- unlike general organic binders there is no generation of gas from the binder under vacuum conditions in the jacket material, and there is no deterioration in heat insulation performance over time. ing.
- Japanese Patent Application Laid-Open No. 7-167736 discloses that inorganic fibers having an average fiber diameter of 2 m or less, and preferably 1 m or less, are subjected to an acidic aqueous solution treatment and a compression dehydration treatment to dissolve components of the inorganic fibers.
- the present invention discloses a vacuum heat-insulating material using a material obtained by collecting inorganic fibers at intersections of inorganic fibers, using the collected fibers as a binder, and binding the inorganic fibers to each other as a core material.
- the effect of the same configuration is that it does not contain a binder that binds the fibers together, so there is no gas generated from the binder under vacuum conditions in the jacket material, and there is no deterioration in thermal insulation performance over time.
- it has excellent heat insulation performance.
- Japanese Patent Application Laid-Open No. 7-139691 discloses that a plurality of papers obtained by acid-making inorganic fibers having an average fiber diameter of 2 / zm or less, preferably 1 m or less are laminated in an acidic atmosphere. Thereafter, a vacuum heat insulating material using a core material obtained by performing a compression treatment and binding inorganic fibers at each intersection with components eluted from the fibers is disclosed. With this structure, there is no deterioration in heat insulation performance over time, and the fiber direction is perpendicular to the heat transfer direction, so solid heat conduction is reduced and vacuum heat insulation with excellent heat insulation performance is achieved. It is said that materials can be provided.
- the solid heat transfer component is suppressed, but it is flocculent and very difficult to handle.
- the formed body such as a blanket, mat, and panel cannot be maintained, when used as a core material of a vacuum heat insulating material, the appearance and surface properties are impaired due to atmospheric compression. Disclosure of the invention
- the vacuum heat insulating material of the present invention is a vacuum heat insulating material comprising: a core material made of inorganic fibers; and a jacket material having a gas barrier property, wherein the inside of the jacket material is decompressed, and the inorganic fibers are made of silicon oxide.
- a core material is a vacuum heat insulating material having an intersection where fibers are in close contact with each other through intermolecular interaction.
- FIG. 1 is a sectional view of a vacuum heat insulating material according to an embodiment of the present invention.
- FIG. 2 is a schematic view of an intersection of core materials according to one embodiment of the present invention.
- FIG. 3 is a sectional view of a refrigerator-freezer according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram illustrating a core material of a conventional example. BEST MODE FOR CARRYING OUT THE INVENTION
- the core material is mainly composed of silicon oxide, and the adhesion of the surface layer of the inorganic fiber is improved, so that the fibers are inter-molecularly interacted with each other. It is characterized by close contact. In other words, due to the intermolecular interaction caused by the molecular structure, the fibers are brought into close contact with each other by attractive force.
- the binder bound at the intersection of inorganic fibers and the elution of inorganic fibers Since no solids are present and solid heat conduction between fibers is not promoted, solid heat conduction as a fibrous body can be reduced, and a vacuum heat insulating material having excellent heat insulating performance can be provided.
- the core material means a fibrous body formed in a plate shape.
- the gas thermal conductivity can be reduced.
- the eccentrically formed maximum voids formed in the core material manufacturing process often remain even after the vacuum heat insulating material is manufactured and the compressive force due to the atmospheric pressure is applied. It is thought that this has caused the deterioration of gas heat conduction.
- the fiber is compressed to the atmosphere so that the void diameter becomes substantially uniform over the entire fibrous body. As a result, it is considered that the voids were uniformly miniaturized without the generation of the maximum voids, and the gas thermal conductivity was further reduced.
- the fibers are in close contact with each other by being attracted to each other by an intermolecular interaction, it is possible to obtain sufficient strength to maintain a formed body which is easy to handle. As a result, when used as a core material for vacuum insulation, the appearance is not impaired by atmospheric compression.
- the inorganic fiber containing silicon oxide as a main component in the present invention refers to an inorganic fiber such as glass wool or silica fiber having the highest ratio of silicon oxide to the whole. ing.
- alumina, sodium oxide, shelf oxide, and the like may be included as accessory components.
- industrially inexpensive glass wool is preferable.
- the finer the diameter of the inorganic fiber the better the heat insulating performance can be obtained.
- the heat insulation performance could be secured only when the fiber diameter of the core material made of inorganic fibers was 2 im or less.
- the vacuum heat insulating material of the present invention sufficient heat insulating performance can be obtained even if a core material having a fiber diameter of 3 m or more is used. Therefore, a fiber diameter of 3 to 4 / m is desirable in order to satisfy both requirements of low cost and high heat insulation performance. Note that the technical concept of the present invention can be applied to fibers having any fiber diameter.
- jacket material of the present invention a material having gas barrier properties can be used for the jacket material of the present invention, a laminated film composed of a surface protective layer, a gas barrier layer, and a heat welding layer is preferred.
- the vacuum heat insulating material of the present invention may be a physical adsorbent such as synthetic zeolite, activated carbon, activated alumina, silica gel, dawsonite, and hydrated talcite, and metal and metal earth.
- a chemical adsorbent such as a simple metal or its oxides and hydroxides, a water adsorbent, and a gas adsorbent may be enclosed in the jacket material.
- the present invention is characterized in that the intermolecular interaction is caused by the Si—OH group, and the ratio of Si—O HZ Si—0 on the surface of the inorganic fiber is 0.1 or more and 20 or less. It is assumed that: By utilizing the hydrogen bond caused by the Si-OH group as the intermolecular interaction, it is possible to obtain a sufficient intermolecular interaction force for the inorganic fibers to adhere to each other, making it easy to handle. Sufficient strength to maintain the body is obtained. In order to make the Si-OH / Si- ⁇ ratio of the inorganic fiber surface to be 0.1 or more and 20 or less, it is necessary to apply a suitable material to the fiber surface before sealing it under reduced pressure as a core material of vacuum heat insulating material.
- Water should be supplied.
- a core material having good external appearance surface properties of the vacuum heat insulating material is produced. That is, on the surface S i _ ⁇ ?
- a fiber body comprising inorganic fibers having a 1 group Oyobi 3 i one H 3 0+ group, by compressing or heat-compressing the fiber body, and an easy molding of the handle, the core and the molded article Used as a material.
- the core material having good appearance surface properties is a core material capable of smoothing the surface of the heat insulating material.
- the core material be capable of smoothing the surface of the heat insulating material.
- the core material be capable of smoothing the surface of the heat insulating material.
- the S i -OH / S i O ratio on the surface of the inorganic fiber can be determined using X-ray photoelectron spectroscopy (XPS) or Fourier transform infrared spectroscopy (FT-IR).
- XPS X-ray photoelectron spectroscopy
- FT-IR Fourier transform infrared spectroscopy
- the peak areas of the two are measured by measuring the Si 2 p spectrum and the O 1 s spectrum.
- FT-IR the spectrum can be obtained by measuring the spectrum of SioH and the spectrum of Sio and comparing the areas of the spectrum with each other.
- the fiber density of the core material composed of inorganic fibers is 150 kg Zm 3 or more and 300 kg / m 3 or less.
- the fiber density refers to the apparent density of a core material which is an aggregate of fibers.
- a refrigerator and a refrigerator according to the present invention are provided with the vacuum heat insulating material according to the present invention.
- INDUSTRIAL APPLICABILITY The vacuum heat insulating material of the present invention has excellent heat insulation performance of at least 10 times that of a conventional rigid urethane foam, thereby achieving high heat insulation of refrigerators and refrigerators and contributing to energy saving.
- the surface of the vacuum heat insulating material is good, the workability of the installation is good, and the smoothness of the surface of the box of the refrigerator and the refrigerator is also good.
- the heat insulation performance does not deteriorate due to an increase in internal pressure due to gas generated from the binder. Therefore, the thermal insulation performance does not deteriorate over time, and it is possible to continuously contribute to energy saving.
- the vacuum heat insulating material of the present invention uses inorganic fibers due to an attractive force caused by intermolecular interaction. They adhere to each other using the phenomenon that they are attracted to each other. Since the adhesion of the surface layer of the inorganic fiber is improved, there is no deterioration in the heat insulation performance due to the gas generated from the binder, and the increase in the solid thermal conductivity through the binding at the fiber intersection is suppressed. Thus, a high-performance vacuum heat insulating material having excellent heat insulating performance can be provided.
- FIG. 1 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 1 of the present invention.
- the vacuum heat insulating material 6 is a material in which the core material 8 is filled in the jacket material 7 under reduced pressure.
- the core material 8 contains silicon oxide as a main component, and the inorganic fibers adhere to each other by being attracted to each other by an attractive force due to a molecular interaction.
- FIG. 2 is a schematic diagram illustrating intersections where inorganic fibers can be placed in close contact by being attracted to each other by an attractive force due to intermolecular interaction.
- Two adjacent inorganic fibers 9 and inorganic fibers 10 are in close contact with each other by intermolecular interaction. Since the fibers are in close contact with each other via the intermolecular force, no binder is observed at the intersection point 11. Nevertheless, in handling It is possible to maintain a sufficient strength of the compact.
- the vacuum heat insulating material of Example 1 has no binder or a dissolved component of the inorganic fiber as a binder at the intersection of the inorganic fibers, and has no solid heat transfer at the fiber intersection. It is possible to exhibit excellent heat insulating performance.
- the fibers adhere to each other by being attracted to each other by intermolecular interaction, sufficient strength to maintain the formed body can be obtained, easy to handle, and used as a core material of vacuum heat insulating material. In such a case, the appearance is not impaired by atmospheric compression.
- Examples 1 to 7 show the results of evaluating the vacuum heat insulating material by changing the Si-OH / Si-0 ratio and the fiber density of the core material composed of inorganic fibers.
- the performance evaluation was based on bending strength and compressive strength in terms of the handleability of the core material and the surface properties of the vacuum insulation material. It has been determined from conventional experience values that the bending strength is sufficient if the bending strength is not less than 0.3 MPa and the compressive strength is not less than 0.05 MPa.
- the Si-OH / Si— i ratio calculated from the peak area ratio of the Si 2 p spectrum and the O 1 s spectrum by XPS is 0.1
- the fiber density of the core material is 250 kg Zm 3 glass wool molded body, metal coating film as jacket material
- a vacuum heat insulating material was manufactured using a laminated film having a thermopolymer layer and a thermoplastic polymer layer.
- the average fiber diameter of the core material was 4 m.
- the compressive strength of the core material was 0.06 MPa
- the bending strength was 0.04 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.001 SWZmK.
- the ratio of Si_ ⁇ H / Si-0 on the surface of the inorganic fiber is 0.1 or more and 20 or less, the fibers are attracted to each other by an intermolecular interaction, and firmly adhere to each other. Since it was possible to obtain sufficient adhesion strength to maintain the formed body, it was easy to handle, and when it was used as a core material of a vacuum insulation material, its appearance was not impaired by atmospheric compression.
- the solid thermal conductivity does not increase due to the binding at the fiber intersections.Furthermore, since there is no binding of the fibers at the fiber intersections, the air is compressed so that the void diameter becomes almost uniform, and the voids are reduced. Due to the effect of reducing the gas thermal conductivity due to the uniform miniaturization, compared to Comparative Examples 1 to 3, it showed excellent heat insulating performance.
- the ratio of S i -OH / S i— ⁇ calculated from the peak area ratio of S i 2 p spectrum and ⁇ 1 s spectrum by XPS is 0.6
- the fiber density of the core material is A vacuum heat insulating material was prepared using a glass wool molded product having a thickness of 250 kgZm 3 and a laminate film having a metal-deposited film layer and a thermoplastic polymer layer as a jacket material.
- the average fiber diameter of the core material was 4 m.
- the compressive strength of the core material was 0.07 MPa
- the bending strength was 0.05 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0013 W ZmK.
- Example 1 A slight increase in compressive strength and bending strength was confirmed from Example 1. It is estimated that this is due to an increase in the ratio of S i — OHZS i.
- the peak of Si 2 p spectrum and 1 s spectrum by XP S S i -OH / S i ten ratio calculated from the click area ratio is 0.9, the fiber density of the core material with a glass wool molded product of 250 kg Roh m 3, metallized fill beam layer as envelope material
- a vacuum heat insulating material was produced using a laminated film having a thermoplastic film and a thermoplastic polymer layer. The average fiber diameter of the core material was 4 m.
- the compressive strength of the core material was 0.07 MPa
- the bending strength was 0.06 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.013 WZmK.
- Example 1 A slight increase in compressive strength and bending strength was confirmed from Example 1. It is presumed that this is due to an increase in the S i — OH / S i — O ratio. The strength is almost the same level as in Example 2.
- the Si-OH / Si-O ratio calculated from the peak area ratio of the Si 2 p spectrum and the 01 s spectrum by XPS is 0.6
- the fiber density of the core material is using glass wool molded product of 150 k gZm 3
- the fiber density of the core material is using glass wool molded product of 150 k gZm 3
- the average fiber diameter of the core material was 4 m.
- the compressive strength of the core material was 0.05 MPa
- the bending strength was 0.03 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0012 WZmK.
- Example 2 A slight reduction in thermal conductivity was confirmed from Example 2 having the same S i -OH / S i- ⁇ ratio. Probably due to the decrease in solid thermal conductivity due to the decrease in density. If the density is 150 k gZm 3, compressive strength and flexural strength is strong enough to handle to maintain easy formers.
- the core material has a Si-OH / Si ratio of 0.6, which is calculated from the peak area ratio of the Si 2 p spectrum and the O 1 s spectrum by XPS, and the core fiber
- a vacuum heat insulating material was manufactured using a glass wool compact having a density of 300 kgZm 3 and using a laminate film having a metal-deposited film layer and a thermoplastic polymer layer as a jacket material.
- the average fiber diameter of the core material was 4 ⁇ m.
- the compressive strength of the core material was 0.08 MPa
- the bending strength was 0.07 MPa
- the thermal conductivity of the vacuum insulation material was 0.0014 WZmK.
- Example 2 having the same Si-OH / Si_0 ratio, an increase in compressive strength and bending strength was confirmed. This is presumed to be due to the increase in density. On the other hand, a slight increase in thermal conductivity is observed, but this difference does not affect the deterioration of solid thermal conductivity.
- the Si-OH / Si ratio calculated from the peak area ratio of the Si 2 p spectrum and the 1 s spectrum by XPS, is 0.6, and the core material fiber density using a glass wool molded product of 350 k gZm 3, to produce a vacuum heat insulating material using the laminated film having a jacket metallized fill beam layer as wood and the thermoplastic polymer layer.
- the average fiber diameter of the core material was as follows.
- the compressive strength of the core material was 0.08 MPa
- the bending strength was 0.07 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0015 W / mK. It showed the same compressive strength and bending strength as in Example 5.
- an increase in thermal conductivity was confirmed. This is due to the increase in density, and the tendency to increase solid heat conduction has begun to appear, but the numerical value of solid heat conduction is at the level of a good product.
- the Si-OH / Si-O ratio calculated from the peak area ratio of the Si 2 p spectrum and the 1 s spectrum by XPS is 0.6
- the fiber density of the core material is
- glass wool molded product of 380 k gZm 3 to produce a vacuum heat insulating material using the laminated film having a jacket metallized fill beam layer as wood and the thermoplastic polymer layer.
- the average fiber diameter of the core material was 4 m.
- the compressive strength of the core material was 0.08 MPa
- the bending strength was 0.07 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0015 WZmK.
- Example 5 Compressive strength and bending strength equivalent to those of Example 5 and Example 6 were exhibited. On the other hand, an increase in thermal conductivity was confirmed. Due to the increase in density The effect of the heat effect has begun to appear, but the numerical value of the solid heat conduction is at the level of a good product.
- the ratio of Si-OH / Si-O calculated from the peak area ratio of Si 2 p spectrum and 1 s spectrum by XPS is 0.6
- the fiber of the core material is A vacuum heat insulating material was produced using a glass wool molded body having a density of 80 kg / m 3 and using a laminated film having a metal-deposited film layer and a thermoplastic polymer layer as a jacket material.
- the compressive strength of the core material was 0.1 MPa or less, the bending strength was 0.01 MPa or less, and the thermal conductivity of the vacuum heat insulating material was 0.0015 W / mK. This is because the core material density was 80 kg / m 3 , and the strength of the molded body was low. Therefore, although the thermal conductivity was excellent, the handleability and the surface properties of the vacuum insulation material deteriorated.
- the core material has a Si-OH / Si ratio of 0.07 calculated from the peak area ratio of the Si 2 p spectrum and the 1 s spectrum by XPS, and the core fiber
- a vacuum heat insulating material was manufactured using a glass wool compact having a density of 150 kg / m 3 and using a laminate film having a metal-deposited film layer and a thermoplastic polymer layer as a jacket material.
- the compressive strength of the core material was 0.03 MPa
- the bending strength was 0.02 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0015 WZmK.
- Table 1 shows the results of an experiment using the same measurement method as in the example.
- a boric acid binder is dispersed to form a bond at the intersections. ⁇ degree with glass wool molded product of 250 k gZm 3, to prepare a vacuum sectional heat material using the laminated film having a metallized film layer and a thermoplastic polymer further as envelope material.
- the average fiber diameter of the core material was 4 / m.
- the compressive strength of the core material was 0.07 MPa
- the bending strength was 0.06 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0022 W / mK.
- the thermal conductivity is larger than that of the example. This is due to the fact that the dispersed boric acid binder forms a binder at the intersections, so that the solid heat conduction increases through the binder.
- an inorganic fiber with an average fiber length of 1 m is subjected to an acidic aqueous solution treatment and compression dewatering treatment.
- a glass wool molded product having a thickness of 250 kgZm 3 a vacuum heat insulating material was produced using a laminate film having a metal-deposited film layer and a thermoplastic polymer layer as a covering material.
- the compressive strength of the core material was 0.07 MPa
- the bending strength was 0.06 MPa
- the thermal conductivity of the vacuum heat insulating material was 0.0033 WZ mK.
- the thermal conductivity shows an extremely large value as compared with the examples. This is because the dissolved component of the inorganic fibers acts as a binder at the intersection, and the thermal conductivity between the inorganic fibers is performed through the binder, thereby increasing the solid thermal conductivity. . Therefore, the effect of the fine fiber diameter is offset.
- a core material As a core material, a plurality of papers obtained by acid-making inorganic fibers with an average fiber of 1 are laminated in an acidic atmosphere, and then subjected to compression treatment. The inorganic fibers are separated from each other by the components eluted from the fibers at each intersection.
- a vacuum heat insulating material was produced using a bonded glass wool having a core material having a fiber density of 250 kgZm 3 and using a laminated film having a metal-deposited film layer and a thermoplastic polymer layer as a jacket material. Evaluation As a result, the compressive strength of the core material was 0.07 MPa, the bending strength was 0.06 MPa, and the thermal conductivity of the vacuum heat insulating material was 0.222 W / mK.
- the thermal conductivity is an extremely large value as compared with the examples. This is because the inorganic fibers are bound at each intersection by components eluted from the fibers.
- the thermal conductivity is lower than that of Comparative Example 2 due to the effect that the fiber direction is oriented perpendicular to the heat transfer direction.
- FIG. 3 is a sectional view of the refrigerator-freezer of the present invention.
- the vacuum heat insulating material 6 according to Embodiment 1 is previously disposed inside a box constituted by the inner box 13 and the outer box 14, and the space other than the vacuum heat insulating material is hardened. It is characterized by being foam-filled with urethane foam 15.
- the refrigerator-freezer thus configured has excellent heat insulation performance, which is at least 10 times higher than that of conventional rigid urethane foam, and thus achieves high heat insulation and can contribute to energy saving.
- the internal pressure increases due to the gas generated from the binder, so that the heat insulation performance does not deteriorate.Therefore, the heat insulation performance does not deteriorate over time, contributing to continuous energy saving. It is possible to do.
- the refrigerator-freezer and the refrigerator according to the present invention refer to devices utilizing hot / cold heat in a range from the operating temperature range of 130 ° C. to normal temperature and higher temperature, such as vending machines. It is not limited to electrical equipment, but also includes gas equipment. Industrial applicability
- the vacuum heat insulating material according to the present invention has significantly reduced solid heat conduction and gas heat conduction, and has excellent heat insulation performance of 10 times or more of the conventional rigid urethane foam.
- the use of the vacuum heat insulating material of the present invention makes it possible to efficiently use hot and cold heat, thereby contributing to energy saving in refrigerators and refrigerators and other equipment, and also protects against heat and cold. It can be applied to all kinds of thermal insulation applications, such as the object you want to do.
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- Chemical & Material Sciences (AREA)
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- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/595,054 US7611761B2 (en) | 2003-12-19 | 2004-08-20 | Vacuum heat insulating material and refrigerating apparatus including the same |
Applications Claiming Priority (2)
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JP2003-422527 | 2003-12-19 | ||
JP2003422527A JP3578172B1 (ja) | 2003-12-19 | 2003-12-19 | 真空断熱材、および、冷凍冷蔵庫および冷凍機器 |
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WO2005061946A1 true WO2005061946A1 (ja) | 2005-07-07 |
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Family Applications (1)
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PCT/JP2004/012320 WO2005061946A1 (ja) | 2003-12-19 | 2004-08-20 | 真空断熱材、および、それを用いた冷凍機器 |
Country Status (5)
Country | Link |
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US (1) | US7611761B2 (ja) |
JP (1) | JP3578172B1 (ja) |
CN (1) | CN1303353C (ja) |
TW (1) | TW200521370A (ja) |
WO (1) | WO2005061946A1 (ja) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10355137A1 (de) * | 2003-11-26 | 2005-06-23 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerätegehäuse |
US9855725B2 (en) | 2005-05-23 | 2018-01-02 | Panasonic Corporation | Vacuum heat insulator and testing method for the glass fiber laminate to be used in the insulator |
JP3712129B1 (ja) | 2005-06-07 | 2005-11-02 | 株式会社マグ | グラスウール成形体の製造方法、グラスウール成形体及び真空断熱材 |
JP4580843B2 (ja) * | 2005-08-24 | 2010-11-17 | 日立アプライアンス株式会社 | 真空断熱材及びそれを用いた冷蔵庫 |
US8807382B1 (en) * | 2009-04-01 | 2014-08-19 | Sierra Lobo, Inc. | Storage system having flexible vacuum jacket |
DE102009034722A1 (de) * | 2009-07-24 | 2011-01-27 | J. Eberspächer GmbH & Co. KG | Befestigungsvorrichtung und Haltevorrichtung |
JP2011074934A (ja) * | 2009-09-29 | 2011-04-14 | Mitsubishi Electric Corp | 真空断熱材、およびこの真空断熱材を備えた断熱箱 |
DE102010040557A1 (de) * | 2010-09-10 | 2012-03-15 | BSH Bosch und Siemens Hausgeräte GmbH | Vakuumkörper für ein Kältegerät |
KR101560355B1 (ko) | 2012-07-27 | 2015-10-15 | 히타치 어플라이언스 가부시키가이샤 | 진공 단열재, 냉장고, 진공 단열재를 사용한 기기 |
JP5953159B2 (ja) * | 2012-07-27 | 2016-07-20 | 日立アプライアンス株式会社 | 真空断熱材及び冷蔵庫 |
JP5982211B2 (ja) * | 2012-07-27 | 2016-08-31 | 日立アプライアンス株式会社 | 真空断熱材、冷蔵庫、真空断熱材を用いた機器 |
DE102013005585A1 (de) * | 2013-02-07 | 2014-08-07 | Liebherr-Hausgeräte Lienz Gmbh | Vakuumdämmkörper |
JP6476084B2 (ja) * | 2015-06-30 | 2019-02-27 | 大倉工業株式会社 | 簡易敷きマットおよび簡易敷きマットの梱包体 |
JP6761777B2 (ja) * | 2017-05-10 | 2020-09-30 | パナソニック株式会社 | 回転仕切体及び冷蔵庫 |
EP3896325A4 (en) * | 2018-12-11 | 2022-01-26 | Toppan Printing Co., Ltd. | Laminated body for vacuum thermal insulation material and vacuum thermal insulation material therewith |
JP7382547B2 (ja) * | 2019-04-05 | 2023-11-17 | パナソニックIpマネジメント株式会社 | 断熱シートおよびその断熱シートを用いた電子機器と電池ユニット |
JP7088892B2 (ja) * | 2019-10-11 | 2022-06-21 | イビデン株式会社 | 組電池用断熱シート及び組電池 |
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JP2002310384A (ja) * | 2001-04-11 | 2002-10-23 | Matsushita Refrig Co Ltd | 真空断熱材、および真空断熱材を備えた冷凍機器、電気湯沸し器、オーブンレンジ |
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- 2003-12-19 JP JP2003422527A patent/JP3578172B1/ja not_active Expired - Lifetime
-
2004
- 2004-08-20 WO PCT/JP2004/012320 patent/WO2005061946A1/ja active Application Filing
- 2004-08-20 US US10/595,054 patent/US7611761B2/en active Active
- 2004-08-27 TW TW93125814A patent/TW200521370A/zh unknown
- 2004-10-25 CN CNB2004100841319A patent/CN1303353C/zh active Active
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JP2002081596A (ja) * | 2000-09-06 | 2002-03-22 | Matsushita Refrig Co Ltd | 真空断熱材、および、真空断熱材の製造方法、冷凍機器、ノート型コンピュータ、電気湯沸かし器、オーブンレンジ |
JP2002310383A (ja) * | 2001-04-16 | 2002-10-23 | Matsushita Refrig Co Ltd | 真空断熱材、および、真空断熱材の製造方法、ノート型コンピュータ、冷凍機器、電気湯沸かし器、オーブンレンジ |
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TW200521370A (en) | 2005-07-01 |
US7611761B2 (en) | 2009-11-03 |
JP2005180594A (ja) | 2005-07-07 |
CN1629532A (zh) | 2005-06-22 |
JP3578172B1 (ja) | 2004-10-20 |
US20060263585A1 (en) | 2006-11-23 |
CN1303353C (zh) | 2007-03-07 |
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