CN109690164A - Vacuumed insulation panel and hot box - Google Patents
Vacuumed insulation panel and hot box Download PDFInfo
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- CN109690164A CN109690164A CN201680088931.9A CN201680088931A CN109690164A CN 109690164 A CN109690164 A CN 109690164A CN 201680088931 A CN201680088931 A CN 201680088931A CN 109690164 A CN109690164 A CN 109690164A
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- Prior art keywords
- insulation panel
- vacuumed insulation
- fiber
- pyroconductivity
- angle
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Classifications
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- 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
Abstract
Vacuumed insulation panel according to the present invention has the enclosure of the core material being made of the aggregate of fiber and the above-mentioned core material of cladding, the inside of above-mentioned enclosure becomes decompression state, wherein, the mean elements of the per unit sectional area of the above-mentioned fiber existing for the section parallel with the thickness direction of the Vacuumed insulation panel is in 3700/mm2Above and 8500/mm2Below.
Description
Technical field
The present invention relates to improve the Vacuumed insulation panel of heat-proof quality and have the hot box of Vacuumed insulation panel.
Background technique
As existing Vacuumed insulation panel used in the thermal insulator as refrigerator etc., following Vacuumed insulation panel is proposed, have
Have that be formed as fibre diameter average at 3 μm or more and 8 μm or less and fibre length is averaged in 2mm or more and 10mm core below
Material and the gas barrier film for covering core material, for the Vacuumed insulation panel, the direction of extension that is, the sky of extension directional profile
Gap rate is 80% or more and 85% hereinafter, and the voidage of its heat-insulated direction that is, thickness direction section is 85% or more and deficiency
100% (referring to patent document 1).
According to patent document 1, in the case where fibre length is in 2mm or more and 10mm range below, fiber is taken
Tropism improves, and the ratio of the parallel fiber of the thickness direction relative to Vacuumed insulation panel increases.On the other hand, in patent document 1
It is middle exist it is following record, fiber is easy to erect if fibre length is shorter, relative to will be from the heat on the surface of Vacuumed insulation panel
It is transferred to the parallel fiber increase of the path i.e. thickness direction at the back side, thus heat-proof quality is deteriorated.In addition, according to patent document 1,
By optimizing carefully fibre diameter, thus fiber volume reducing shared by the inside of interior parcel post, the sky in Vacuumed insulation panel
Gap rate (ratio of volume shared by the high vacuum of thermal insulation) improves, it is thus possible to which the pyroconductivity for reducing Vacuumed insulation panel mentions
The heat-proof quality of high vacuum insulation part.
Patent document 1: Japanese Unexamined Patent Publication 2011-236953 bulletin
Summary of the invention
In above patent document 1, the heat-insulated direction of the Vacuumed insulation panel that is, voidage of the section of thickness direction exists
85% or more and less than 100%.That is, according to patent document 1, if the voidage of thickness direction section is big, shared by vacuum space
Ratio is big, then the heat-proof quality of Vacuumed insulation panel is high.However, the pyroconductivity of Vacuumed insulation panel at least by solid thermal conduction rate with
And the two pyroconductivities of gas pyroconductivity determine.Therefore, for Vacuumed insulation panel disclosed in patent document 1, by
Become leading in gas pyroconductivity, thus there is the project for not necessarily obtaining high heat-proof quality.
The present invention be it is completed to solve the above problems, first is designed to provide a kind of heat-proof quality than previous
High Vacuumed insulation panel.In addition, the second object of the present invention be to provide it is a kind of have heat-proof quality than previous high vacuum every
The hot box of warmware.
Vacuumed insulation panel according to the present invention has the core material being made of the aggregate of fiber and coats above-mentioned core material
The inside of enclosure, above-mentioned enclosure becomes decompression state, wherein in the section parallel with the thickness direction of the Vacuumed insulation panel
The mean elements of the per unit sectional area of existing above-mentioned fiber is in 3700/mm2Above and 8500/mm2Below.
The individual pyroconductivity of Vacuumed insulation panel according to the present invention and the balance of expectation pyroconductivity are good, thus
Heat-proof quality can be improved than in the past.
Detailed description of the invention
Fig. 1 is by the micro- by scanning electron of the cutting plane of average fiber radical measurement sample according to the present invention
The figure that the secondary electron image that mirror obtains is depicted as attached drawing.
Fig. 2 is the figure for indicating the relationship at average orientation angle and pyroconductivity.
Fig. 3 is the cross-sectional view for indicating Vacuumed insulation panel involved in embodiments of the present invention 1.
Fig. 4 is the figure for indicating the relationship of average fiber radical and pyroconductivity.
Fig. 5 is the figure for indicating the relationship of 15 ° of angle of orientation average fiber radicals below and pyroconductivity.
Fig. 6 is the figure for indicating the relationship of avarage fiber diameter and pyroconductivity.
Fig. 7 is to indicate hot box cross-sectional view involved in embodiments of the present invention 2.
Specific embodiment
Vacuumed insulation panel according to the present invention has: core material is made of the aggregate of fiber；And enclosure, coat core
The inside of material, enclosure becomes decompression state.Moreover, being present in and the vacuum in Vacuumed insulation panel according to the present invention
The parallel section of the thickness direction of thermal insulator, constitute core material fiber per unit sectional area mean elements 3700/
mm2Above and 8500/mm2Below.In addition, in Vacuumed insulation panel according to the present invention, preferably will be with the vacuum heat-insulation
When the vertical section of the thickness direction of part and the filamentous angle for constituting core material are defined as the angle of orientation, it is present in true with this
The parallel section of the thickness direction of empty thermal insulator, the angle of orientation be 15 ° of fibers below per unit sectional area mean elements
In 2400/mm2Above and 4600/mm2Below.
Here, the mean elements of the per unit sectional area of fiber and the angle of orientation are that the per unit of 15 ° of fibers below is cut
The mean elements of area refers to the measured value measured as follows.In addition, hereinafter, by the flat of the per unit sectional area of fiber
Equal radical is known as " average fiber radical ".In addition, by the mean elements for the per unit sectional area that the angle of orientation is 15 ° of fibers below
Referred to as " 15 ° of angle of orientation average fiber radicals below ".
(average fiber radical measuring method)
Average fiber radical measurement sample is made as follows.Firstly, in order to keep Vacuumed insulation panel in vacuum shape
Thickness under state keeps the thickness of original Vacuumed insulation panel using the outside of the fixed Vacuumed insulation panel of epoxy resin.Then,
Vacuumed insulation panel is dismantled, epoxy resin is internally flowed into, and is allowed to solidify.After solidification, with heat-insulated direction, that is, thickness direction
The substantially central portion of parallel face cutting Vacuumed insulation panel.Then, cutting plane is ground, the measurement of average fiber radical is made
Use sample.Wherein, the cutting plane parallel with thickness direction is, for example, aftermentioned D-D section shown in Fig. 3.
For manufactured average fiber radical measurement sample, implemented using scanning electron microscope with 500 times of multiplying power
The secondary electron image of cutting plane is shot, and carries out image analysis to the secondary electron image taken.
Fig. 1 is by the micro- by scanning electron of the cutting plane of average fiber radical measurement sample according to the present invention
The figure that the secondary electron image that mirror obtains is depicted as attached drawing.
Scribbled in Fig. 1 hatching elliptical structure each be fiber section.With average fiber radical
By the secondary electron figure of the cutting plane of average fiber radical measurement sample on the vertical direction of the thickness direction of measurement sample
Picture zoning is multiple regions, any one zoning Z in above-mentioned zoning counts the number of fiber being present in zoning Z.So
Afterwards, the mean elements i.e. average fiber radical of the per unit sectional area of fiber is found out according to the area of the number of fiber and zoning Z.
In addition, in the case where the cutting plane of average fiber radical measurement sample is, for example, aftermentioned D-D section shown in Fig. 3, with
The vertical direction of the thickness direction of average fiber radical measurement sample becomes the paper orthogonal direction of aftermentioned Fig. 3.
(15 ° of angle of orientation average fiber radical measuring methods below)
Using above-mentioned average fiber radical measurement sample cutting plane by scanning electron microscope obtain it is secondary
Electronic image as follows calculates the angle of orientation for each fiber being present in above-mentioned zoning Z.
In detail, firstly, as shown in Figure 1, by with heat-insulated direction, that is, average fiber radical measurement sample thickness side
Datum level C is defined as to vertical section.In addition, datum level C becomes aftermentioned E-E section shown in Fig. 3.Further, it is assumed that fine
The all ellipses of the section of dimension.Moreover, as shown in Figure 1, for all fibres that are present in zoning Z, to the long axis of section
Angle θ [°] formed by length a [μm] and the length b [μm] of short axle, long axis and datum level C is determined.In addition, the length of long axis
A [μm] measurement is spent until 0.01 μm of unit.Length b [μm] measurement of short axle is until 0.01 μm of unit.Long axis and datum level C
Formed angle θ [°] measurement is until 0.01 ° of unit.Then, all fibres meter being present in zoning Z is directed to by following formula
Calculate the angle of orientation
[formula 1]
Next, to the angle of orientation in all fibres being present in zoning Z be 15 ° of fibers below radical ratio into
Calculating is gone.Then, the resulting value that is multiplied using the radical ratio with the average fiber radical previously found out as 15 ° of the angle of orientation with
Under average fiber radical.
Here, it is illustrated to the reasons why having selected 15 ° of the angle of orientation.Inventor makes multiple Vacuumed insulation panels, and finds out
The pyroconductivity of each Vacuumed insulation panel.Then, above-mentioned average fiber radical measurement examination has been made using each Vacuumed insulation panel
Sample.Then, for each average fiber radical measurement sample, by the above method to all fibres being present in zoning Z
Calculate the angle of orientationIn addition, being directed to each average fiber radical measurement sample, will be present in all in zoning Z
The angle of orientation of fiberAverage value calculated as average orientation angle.Then, inventor to pyroconductivity with averagely take
It is studied to the relationship at angle.
Fig. 2 is the figure for indicating the relationship at average orientation angle and pyroconductivity.
As shown in Fig. 2, being 15 ° of ranges below at average orientation angle, pyroconductivity is 1.9mW/mK hereinafter, substantially one
It is fixed.In contrast, if average orientation angle is more than 15 °, it is 1.9mW/mK or more that pyroconductivity, which increases,.Therefore, it will averagely take
To angle be set as 15 ° or less make pyroconductivity reduce in terms of be important value, it is below average to 15 ° of the angle of orientation in the present invention
Number of fiber is calculated.
In addition, in the relationship of average orientation angle and pyroconductivity, for diafiltration can be passed through with this case that inflection point
Theoretical (Percolation theory) is illustrated.Average orientation angle is smaller, and fiber is in the heat-insulated direction of Vacuumed insulation panel
The probability of thickness direction orientation is lower, and hot path is longer.It is therefore contemplated that pyroconductivity is lower, heat-proof quality is got higher.Another party
Face, if average orientation angle becomes larger, fiber is got higher in heat-insulated direction, that is, thickness direction orientation probability, and hot path shortens.Cause
This, it is believed that pyroconductivity is got higher, heat-proof quality is lower.As shown in Fig. 2, being 15 ° hereinafter, pyroconductivity becomes at average orientation angle
Constant, if pyroconductivity increases severely more than 15 °, thus the point for providing 15 ° of average orientation angle is path of the heat on heat-insulated direction
The enlightenment of the point sharply to shorten.For the above-mentioned reasons, it is believed that there is inflection point in the relationship of average orientation angle and pyroconductivity.
Embodiment 1.
Hereinafter, being illustrated with reference to the accompanying drawings to Vacuumed insulation panel involved in embodiments of the present invention 1.
Fig. 3 is the cross-sectional view for indicating Vacuumed insulation panel involved in embodiments of the present invention 1.The vacuum shown in Fig. 3
The up and down direction of the paper of thermal insulator 1 is thickness direction, that is, heat-insulated direction.
Vacuumed insulation panel 1 has the enclosure of the core material 2 being made of fiber assembly and the gas barrier property for coating the core material 2
3.Moreover, being depressurized to 1Pa (Pascal)~3Pa vacuum degree in the inside of enclosure 3 for Vacuumed insulation panel 1
Under state, opening portion is sealed by the frit seal portion 5 by formation such as thermal weldings.In addition, in present embodiment 1, vacuum every
Warmware 1, which is also equipped with, to be adsorbed the moisture of the inside of enclosure 3 to inhibit to last the moisture adsorbent 4 of deterioration.
Core material 2 is not particularly limited material, can be glass fibre, alumina fibre, silica alumina fiber, silica
Fiber, rock wool, silicon carbide fibre and non-woven fabrics etc..
Enclosure 3 at least has barrier layer for gases and hot welding layer, can according to need setting sealer etc..Gas
As long as body barrier layer is not particularly limited material to reduce the purpose use that gas penetrates.As barrier layer for gases, such as
It is able to use the plastic foil for being vapor-deposited with metal, metal oxide or diamond-like-carbon.In addition, for example as barrier layer for gases, energy
Enough using metal foil etc..In addition, the material for the metal oxide being deposited on above-mentioned plastic foil, is able to use silica and oxygen
Change aluminium etc., but is not particularly limited.
The hot welding layer of above-mentioned enclosure 3 is the part when being heating-fusion bonded equal as frit seal portion 5.Hot welding layer is
Gas permeability the best part in the film of enclosure 3 is constituted, the property of hot welding layer substantially influences lasting for Vacuumed insulation panel 1
Heat-proof quality.If the suppression for considering the stability of the sealing quality in reduced pressure sealing process, being invaded from the gas of heat-fused portion end face
System and caused by using heat transfer in the case where metal foil as barrier layer for gases from the heat leak on surface, then heat
The thickness for connecing layer is suitble at 25 μm~60 μm.As the material of hot welding layer, such as it is able to use no extension polypropylene screen, highly dense
Polyethylene film and straight-chain low density polyethylene films etc. are spent, but is not particularly limited material.
In addition, sealer can also be arranged in the outside of barrier layer for gases.As sealer, can utilize poly-
Extension processed goods of ethylene glycol terephthalate film, polypropylene screen and nylon membrane etc..Also, by as surface protection
Layer uses nylon membrane etc., additionally it is possible to improve bend-resistance and paracentesis resistance of enclosure 3 etc..
In addition, the bag shape of enclosure 3 have four side hermetic bags, erecting packing bag (gazette bag), three-side-sealed pouch,
Pillow pouch (Pillow bag) and center rubberizing hermetic bag etc., but be not particularly limited.
Moisture adsorbent 4 is, for example, the calcium oxide (CaO) etc. being inserted into the good bag of aeration.Moisture adsorbent 4 is simultaneously
It is non-to be only defined in CaO, zeolite etc. have the substance of water adsorption also can, be not particularly limited.
Next, being illustrated to the manufacturing method of Vacuumed insulation panel 1 involved in present embodiment 1.
Core material 2 is being inserted into the enclosure 3 of bag shape and by after being used for the drying process of moisture removal, by moisture
Adsorbent 4 is inserted into enclosure 3.Moreover, in the state that the inside of enclosure 3 is depressurized to the vacuum degree of 1Pa~3Pa,
The opening portion of enclosure 3 is sealed by frit seal portion 5, to obtain Vacuumed insulation panel 1.In addition, for drying process and
Speech, as long as meeting the condition that can remove core material 2 with the moisture for the enclosure 3 for coating the core material 2, actual conditions are not special
It limits.For example, carrying out heating in 2 hours at 100 DEG C as drying process.In addition, moisture adsorbent 4 does not limit
It is inserted into after by drying process.For example, it is also possible to which moisture adsorbent 4 is inserted into enclosure 3 before drying process
It is interior.In addition, such as carrying out the case where pressurization is compressed to the enclosure 3 of core material 2 and cladding core material 2 using processing unit (plant)
Under, moisture adsorbent 4 can be inserted into enclosure 3 before pressurization compression.
Then, to involved in Vacuumed insulation panel 1 involved in 1~embodiment of the embodiment of the present invention 5 and comparative example
The measurement result of in Vacuumed insulation panel, " average fiber radical " and " 15 ° of angle of orientation average fiber radicals below " carries out
Explanation.Wherein, above-mentioned " average fiber radical " and " 15 ° of angle of orientation average fiber radicals below " be by the above method into
Row measurement.It is shown in table 1 involved by Vacuumed insulation panel 1 and comparative example involved in 1~embodiment of the embodiment of the present invention 5
And Vacuumed insulation panel in, the measurement result of " average fiber radical " and " 15 ° of angle of orientation average fiber radicals below ".
[table 1]
In addition, for Vacuumed insulation panel 1 and comparative example institute involved in 1~embodiment of the embodiment of the present invention 5 in table 1
Avarage fiber diameter is also shown respectively in the Vacuumed insulation panel being related to.Avarage fiber diameter shown in table 1 is the fiber for constituting core material 2
Fibre diameter average value, be measured as follows.
In all elliptical situations of section for assuming fiber as described above, fibre diameter is equivalent to the length of short axle
b[μm].Therefore, true involved in Vacuumed insulation panel 1 and comparative example involved in 1~embodiment of the embodiment of the present invention 5
It is straight to the fiber for all fibres being present in above-mentioned zoning Z in the empty respective average fiber radical measurement sample of thermal insulator
Diameter, that is, short axle length b [μm] is determined.Moreover, for vacuum involved in 1~embodiment of the embodiment of the present invention 5 every
The respective average fiber radical measurement sample of Vacuumed insulation panel involved in warmware 1 and comparative example, to being present in above-mentioned area
The average value for drawing the fibre diameter of all fibres in Z is calculated, as avarage fiber diameter.Wherein, all fibres
Fibre diameter, that is, short axle length b [μm] measurement is until 0.01 μm of unit.
(embodiment 1)
For the average fiber for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel 1 involved in embodiment 1
The mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of radical, i.e. Vacuumed insulation panel 1,
It is 3783/mm when being measured according to the method described above2.Next, being surveyed according to the method described above to the angle of orientation of each fiber
It is 0.74 when determining, and calculating the radical ratio of 15 ° of fibers below of the angle of orientation.By the radical ratio with previously found out
Average fiber radical is multiplied, and is 2799/mm when calculating 15 ° of average fiber radicals below of the angle of orientation2.In addition, according to upper
It states method to be determined avarage fiber diameter, result is 4.3 μm.
In addition, being made involved in embodiment 1 in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm
Vacuumed insulation panel 1 is determined the pyroconductivity of the Vacuumed insulation panel 1.Pyroconductivity is 1.78mW/mK, is good
Value.Determination condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.Wherein, above-mentioned plane
Size refers to: cladding when observing the Vacuumed insulation panel 1 along the direction arrow F in the case where Vacuumed insulation panel 1 for example shown in Fig. 3
The size of 3 part of enclosure of core material 2.In addition, in the case that above-mentioned thickness refers to Vacuumed insulation panel 1 for example shown in Fig. 3
The size of the Vacuumed insulation panel 1 of paper up and down direction.
(embodiment 2)
For the average fiber for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel 1 involved in embodiment 2
The mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of radical, i.e. Vacuumed insulation panel 1,
It is 4472/mm when being measured according to above-mentioned method2.Next, being carried out according to the method described above to the angle of orientation of each fiber
It is 0.64 when measuring, and calculating the radical ratio of 15 ° of fibers below of the angle of orientation.By the radical ratio with previously found out
Average fiber radical be multiplied, calculate 15 ° of average fiber radicals below of the angle of orientation when be 2862/mm2.In addition, according to upper
It states method to be determined avarage fiber diameter, result is 3.9 μm.
In addition, being made involved in embodiment 2 in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm
Vacuumed insulation panel 1 is determined the pyroconductivity of the Vacuumed insulation panel 1.Pyroconductivity is 1.60mW/mK, is good
Value.Determination condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.
(embodiment 3)
For the average fiber for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel 1 involved in embodiment 3
The mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of radical, i.e. Vacuumed insulation panel 1,
It is 5236/mm when being measured according to the method described above2.Next, being surveyed according to the method described above to the angle of orientation of each fiber
It is 0.69 when determining, and calculating the radical ratio of 15 ° of fibers below of the angle of orientation.By the radical ratio with previously found out
Average fiber radical is multiplied, and is 3612/mm when calculating 15 ° of average fiber radicals below of the angle of orientation2.In addition, according to above-mentioned
Method is determined avarage fiber diameter, and result is 3.8 μm.
In addition, being made involved in embodiment 3 in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm
Vacuumed insulation panel 1 is determined the pyroconductivity of the Vacuumed insulation panel 1.Pyroconductivity is 1.52mW/mK, is good
Value.Determination condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.
(embodiment 4)
For the average fiber for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel 1 involved in embodiment 4
The mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of radical, i.e. Vacuumed insulation panel 1,
It is 8119/mm when being measured according to the method described above2.Next, being surveyed according to the method described above to the angle of orientation of each fiber
It is 0.53 when determining, and calculating the radical ratio of 15 ° of fibers below of the angle of orientation.By the radical ratio with previously found out
Average fiber radical is multiplied, and is 4303/mm when calculating 15 ° of average fiber radicals below of the angle of orientation2.In addition, according to above-mentioned
Method is determined avarage fiber diameter, and result is 3.0 μm.
In addition, being made involved in embodiment 4 in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm
Vacuumed insulation panel 1 is determined the pyroconductivity of the Vacuumed insulation panel 1.Pyroconductivity is 1.66mW/mK, is good
Value.Determination condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.
(embodiment 5)
For the average fiber for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel 1 involved in embodiment 5
The mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of radical, i.e. Vacuumed insulation panel 1,
It is 7098/mm when being measured according to the method described above2.Next, being surveyed according to the method described above to the angle of orientation of each fiber
It is 0.55 when determining, and calculating the radical ratio of 15 ° of fibers below of the angle of orientation.By the radical ratio with previously found out
Average fiber radical is multiplied, and is 3904/mm when calculating 15 ° of average fiber radicals below of the angle of orientation2.In addition, according to above-mentioned
Method is determined avarage fiber diameter, and result is 3.1 μm.
In addition, being made involved in embodiment 5 in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm
Vacuumed insulation panel 1 is determined the pyroconductivity of the Vacuumed insulation panel 1.Pyroconductivity is 1.68mW/mK, is good
Value.Determination condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.
(comparative example)
For the average fiber root for being present in the section parallel with heat-insulated direction of Vacuumed insulation panel involved in comparative example
It counts, i.e. the mean elements of the per unit sectional area of the fiber for being present in the section parallel with thickness direction of Vacuumed insulation panel, presses
It is 2669/mm when according to above method measurement2.Next, being measured according to the method described above to the angle of orientation of each fiber, and right
It is 0.68 when the radical ratio of 15 ° of fibers below of the angle of orientation is calculated.By the radical ratio and the average fibre that previously found out
It ties up radical to be multiplied, is 1815/mm when calculating 15 ° of average fiber radicals below of the angle of orientation2.In addition, right according to the method described above
Avarage fiber diameter is determined, and result is 4.7 μm.
In addition, in such a way that planar dimension becomes 280mm × 340mm, thickness becomes 20mm involved in comparison example
Vacuumed insulation panel is determined the pyroconductivity of the Vacuumed insulation panel.Pyroconductivity is 2.10mW/mK, is got higher.Measurement
Condition is then according to 37.7 DEG C of high temperature side, 10 DEG C of low temperature side, 23.85 DEG C of mean temperature implementations.That is, vacuum involved in comparative example every
The pyroconductivity of warmware is higher than the pyroconductivity of Vacuumed insulation panel 1 involved in 1~embodiment of embodiment 5, thus heat-proof quality
Difference.
By vacuum heat-insulation involved in Vacuumed insulation panel 1 involved in above 1~embodiment of embodiment 5 and comparative example
The result of part is drawn on Fig. 4~Fig. 6.
Fig. 4 is the figure for indicating the relationship of average fiber radical and pyroconductivity.
Firstly, being investigated to average fiber radical.When having carried out approximate to the point for being drawn on Fig. 4 using quadratic expression, phase
Closing coefficients R is 0.95, and there are high correlations.Generally in the case where 0.7 1 < < R, it is considered as with high correlation.According to the knot
Fruit, average fiber radical are 5900/mm2When, pyroconductivity is minimum.In addition provide following enlightenment: average fiber radical is in
3700/mm2Above and 8500/mm2When range below, pyroconductivity 1.8mW/mK or less can be made.That is, at this
In range, it is capable of providing the Vacuumed insulation panel that heat-proof quality is higher than existing Vacuumed insulation panel.Therefore, in order to make pyroconductivity
1.8mW/mK hereinafter, obtain heat-proof quality than previous high Vacuumed insulation panel, as long as make average fiber radical be in 3700/
mm2Above and 8500/mm2Range below.In addition, by making average fiber radical be in 4700/mm2Above and
7400/mm2Range below, pyroconductivity 1.6mW/mK can be made hereinafter, so as to make Vacuumed insulation panel 1 every
It is hot to can be further improved.
In addition, additional information following content: the existing vacuum including the Vacuumed insulation panel documented by the patent document 1
In thermal insulator, 3700/mm is unsatisfactory in average fiber radical2Above and 8500/mm2In the case where range below, exist
Pyroconductivity is greater than the case where 1.8mW/mK.
In the relationship of average fiber radical and pyroconductivity, there are this case that the smallest point of pyroconductivity being capable of basis
Following content is illustrated.In general, the pyroconductivity of Vacuumed insulation panel is solid thermal conduction rate, gas pyroconductivity, base
The sum of pyroconductivity in radiation and the pyroconductivity based on convection current.However, under substantially 20kPa vacuum below or empty
When 1mm or so is following, the influence of the heat transfer based on convection current can ignore that gap diameter.In addition, below using warm at 100 DEG C
Under the conditions of degree, the influence of the heat transfer based on radiation is not present.Therefore, common Vacuumed insulation panel is 20kPa in internal pressure
Below, it uses under the conditions of 100 DEG C of temperature below, thus is led based on solid thermal conduction and gas heat transfer.Heat based on solid
Conductivity is proportional to bulk density.This is because if bulk density increase solid portion increase, thus pyroconductivity become larger.
On the other hand, the effect of radiation is stopped to increase if bulk density increase, thus the thermally conductive reduction based on radiation.Namely based on spoke
The pyroconductivity penetrated is inversely proportional with bulk density, but can ignore that in the case where use under the conditions of 100 DEG C of temperature below.By
This, if average fiber radical increases, bulk density increases, thus solid thermal conduction rate increases, if average fiber radical is reduced,
Then bulk density is reduced, thus solid thermal conduction rate is reduced.
In addition, being influenced based on the pyroconductivity of gas by the space size inside Vacuumed insulation panel.In general, vacuum
Vacuum degree substantially 1Pa~3Pa of inside of thermal insulator or so, the mean free path of the air under the vacuum degree is substantially
100 μm or so.In addition, substantially 10~20 μm of distance between the fiber of Vacuumed insulation panel, thus be the average free walker than gas
The short space length of journey.In the case where space length is longer than the mean free path of gas, the pyroconductivity of gas with it is static
The pyroconductivity of gas is consistent.On the other hand, in the case where space length is shorter than the mean free path of gas, the heat of gas
Conductivity is less than the pyroconductivity of stationary gas.That is, distance compares gas between space length, that is, fiber of the inside of Vacuumed insulation panel
Mean free path it is short, it is thus regarded that distance is longer between fiber, the pyroconductivity of gas is higher, and distance is shorter between fiber, gas
The pyroconductivity of body is smaller.If average fiber radical increases as a result, bulk density increases, and distance shortens between fiber, thus gas
Body heat conductivity is reduced, if average fiber radical is reduced, bulk density is reduced, number of fiber is elongated, thus gas heat transfer
Rate increases.
According to the above it is found that facilitating the solid thermal conduction rate and gas heat transfer of the pyroconductivity of Vacuumed insulation panel
Rate becomes opposite relationship.That is, solid thermal conduction rate increases if average fiber radical increases, gas pyroconductivity is reduced.Separately
On the one hand, if average fiber radical is reduced, solid thermal pyroconductivity is reduced, and gas pyroconductivity increases.Thus, it is possible to say
In the relationship of average fiber radical and pyroconductivity, there are the smallest points of pyroconductivity, in order to make the heat transfer of Vacuumed insulation panel
Rate is reduced, and solid thermal conduction rate and the balance of gas pyroconductivity are important.
Fig. 5 is the figure for indicating the relationship of 15 ° of angle of orientation average fiber radicals below and pyroconductivity.
Next, being investigated to 15 ° of angle of orientation average fiber radicals below.Using quadratic expression to being drawn on Fig. 5's
When point has carried out approximate, coefficient R becomes 0.96, and there are high correlations.It is according to this as a result, below flat at 15 ° of the angle of orientation
Equal number of fiber is 3400/mm2When, pyroconductivity is minimum.In order to make pyroconductivity 1.8mW/mK hereinafter, obtaining heat-insulated
Performance is than previous high Vacuumed insulation panel, as long as 15 ° of angle of orientation average fiber radicals below is made to be in 2400/mm2More than
And 4600/mm2Range below.In addition, by make 15 ° of angle of orientation average fiber radicals below be in 3000/
mm2Above and 4000/mm2Range below, pyroconductivity 1.6mW/mK can be made hereinafter, so as to make vacuum every
The heat-proof quality of warmware 1 further increases.
In addition, additional information following content: existing true including the Vacuumed insulation panel documented by the patent document 1
In empty thermal insulator, 2400/mm is unsatisfactory in 15 ° of angle of orientation average fiber radicals below2Above and 4600/mm2It is below
In the case where range, there are pyroconductivity be greater than 1.8mW/mK the case where.
As known from Table 1, for Vacuumed insulation panel 1 involved in 1~embodiment of the embodiment of the present invention 5 and comparative example institute
For the Vacuumed insulation panel being related to, average fiber radical is more, and 15 ° of angle of orientation average fiber radicals below are also more.That is,
Proportionate relationship is set up between average fiber radical and 15 ° of angle of orientation average fiber radicals below.Therefore, 15 ° of the angle of orientation with
Under average fiber radical and pyroconductivity relationship in, there are the logic of the smallest point of pyroconductivity become and average fiber root
Number is same theoretical.Therefore, it in the relationship of 15 ° of angle of orientation average fiber radicals below and pyroconductivity, omits and there is heat
The explanation of the logic of the smallest point of conductivity.
Fig. 6 is the figure for indicating the relationship of avarage fiber diameter and pyroconductivity.
Finally, studying avarage fiber diameter.When having carried out approximate to the point for being drawn on Fig. 6 using quadratic expression, phase
Closing coefficients R becomes 0.99, and there are high correlations.According to this as a result, pyroconductivity is minimum when avarage fiber diameter is 3.6 μm.
In addition, in order to make pyroconductivity 1.8mW/mK hereinafter, obtaining heat-proof quality than previous high Vacuumed insulation panel, it is preferably average
Fibre diameter is in 2.8 μm or more and 4.3 μm of ranges below.In addition, by make avarage fiber diameter be in 3.2 μm or more and
3.9 μm of ranges below can make pyroconductivity 1.6mW/mK hereinafter, thermal insulation so as to make Vacuumed insulation panel 1
It can be further improved.
In addition, additional information following content: existing true including the Vacuumed insulation panel documented by the patent document 1
In empty thermal insulator, in the case where avarage fiber diameter is unsatisfactory for 2.8 μm or more and 4.3 μm of ranges below, there are heat transfer
Rate is greater than the case where 1.8mW/mK.
In the relationship of avarage fiber diameter and pyroconductivity, there are the smallest point of pyroconductivity this case, Neng Gougen
It is illustrated according to following content.If fibre diameter is thicker, solid thermal conduction rate increases.On the other hand, if fibre diameter attenuates,
Then solid thermal conduction rate is reduced.However, fibre diameter is thinner, fiber is more intricately wound, and is become and heat-insulated direction i.e. thickness side
Increase to the probability of parallel fiber alignment, heat conduction amount increases.In addition, fibre diameter is thinner, the rigidity of fiber is lower thus fine
Dimension is easy to be applied to the stress of the mutual contact point of fiber caused by atmospheric pressure due to deform.That is, fibre diameter is thinner, fiber
The angle of orientation is bigger, thus because pyroconductivity caused by the angle of orientation increases.According to above reason, it is believed that average fiber radical with
In the relationship of pyroconductivity, there are the smallest points of pyroconductivity.
Embodiment 2.
In present embodiment 2, to an example of the hot box for having Vacuumed insulation panel involved in embodiment 1 into
Row explanation.In addition, the project and embodiment 1 not described especially are same, for identical function, knot in present embodiment 2
Structure is described using identical appended drawing reference.
Fig. 7 is the cross-sectional view for indicating hot box involved in embodiments of the present invention 2.
Hot box 6 has outer container 8 and is configured at the interior case 7 of the inside of outer container 8.Hot box 6 be also equipped be configured at outer container 8 with
Vacuumed insulation panel 1 between interior case 7.Outer container 8 is for example formed by steel plate.Interior case 7 is for example formed by ABS resin.Vacuumed insulation panel 1
It is Vacuumed insulation panel 1 shown in embodiment 1.Vacuumed insulation panel 1 is for example set to the face opposed with outer container 8 in interior case 7
Or the face opposed with interior case 7 in outer container 8.In addition, not the setting in the space being formed between outer container 8 and interior case 7 of hot box 6
Set the foam filled polyurathamc thermal insulator 9 in space of Vacuumed insulation panel 1.In other words, it is being formed between outer container 8 and interior case 7
Space in the space configuration of not set Vacuumed insulation panel 1 have polyurathamc thermal insulator 9.
The hot box 6 constituted in this way for example uses in refrigerator.That is, the inside of hot box 6 is used as storeroom.It is heat-insulated
The Vacuumed insulation panel 1 that case 6 has can improve heat-proof quality as illustrated in the embodiment 1 than in the past.Therefore,
Hot box 6 involved in present embodiment 2 can also improve heat-proof quality than in the past.Therefore, by by 6 use of hot box in ice
Case is capable of providing a kind of refrigerator that consumption electric power is small.
Description of symbols:
1 ... Vacuumed insulation panel；2 ... core materials；3 ... enclosures；4 ... moisture adsorbents；5 ... frit seal portions；6 ... is heat-insulated
Case；7 ... interior casees；8 ... outer containers；9 ... polyurathamc thermal insulators.
Claims (4)
1. a kind of Vacuumed insulation panel has the enclosure of the core material being made of the aggregate of fiber and the cladding core material, described
The inside of enclosure becomes decompression state,
The Vacuumed insulation panel is characterized in that,
The average root of the per unit sectional area of the fiber existing for the section parallel with the thickness direction of the Vacuumed insulation panel
Number is in 3700/mm2Above and 8500/mm2Below.
2. Vacuumed insulation panel according to claim 1, which is characterized in that
When the section vertical with the thickness direction and the filamentous angle are defined as the angle of orientation,
Existing for the section parallel with the thickness direction and the angle of orientation is cut in the per unit of 15 ° of fibers below
The mean elements of area is in 2400/mm2Above and 4600/mm2Below.
3. Vacuumed insulation panel according to claim 1 or 2, which is characterized in that
The average value of the fibre diameter of the fiber is at 2.8 μm or more and 4.3 μm or less.
4. a kind of hot box, which is characterized in that have:
Outer container；
Interior case, the interior case are configured at the inside of the outer container；And
Vacuumed insulation panel according to any one of claims 1 to 3, the Vacuumed insulation panel are configured at the outer container and the interior case
Between.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/076374 WO2018047261A1 (en) | 2016-09-08 | 2016-09-08 | Vacuum insulation material and insulation box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109690164A true CN109690164A (en) | 2019-04-26 |
Family
ID=61562619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680088931.9A Pending CN109690164A (en) | 2016-09-08 | 2016-09-08 | Vacuumed insulation panel and hot box |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2018047261A1 (en) |
| CN (1) | CN109690164A (en) |
| WO (1) | WO2018047261A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7337505B2 (en) * | 2019-01-24 | 2023-09-04 | 株式会社ダイセル | Insulation material and its manufacturing method |
| WO2020152854A1 (en) * | 2019-01-25 | 2020-07-30 | 三菱電機株式会社 | Vacuum heat insulation material and heat insulation box |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011016696A2 (en) * | 2009-08-07 | 2011-02-10 | Lg Electronics Inc. | Vacuum insulation member, refrigerator having vacuum insulation member, and method for fabricating vacuum insulation member |
| JP2011236953A (en) * | 2010-05-10 | 2011-11-24 | Hitachi Appliances Inc | Vacuum heat insulating material, heat insulating box and refrigerator using the same |
| CN102388253A (en) * | 2009-04-07 | 2012-03-21 | 夏普株式会社 | Vacuum insulation material and appliance provided therewith |
| CN103574229A (en) * | 2012-07-27 | 2014-02-12 | 日立空调·家用电器株式会社 | Vacuum heat insulating material, refrigerator and device employing vacuum heat insulating material |
| JP2015145696A (en) * | 2014-02-03 | 2015-08-13 | 三菱電機株式会社 | Vacuum heat-insulating material, heat-insulating box using vacuum heat-insulating material, and method for manufacturing vacuum heat-insulating material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2982897B1 (en) * | 2013-04-05 | 2019-09-25 | Mitsubishi Electric Corporation | Vacuum heat-insulating material, thermal insulation tank provided with same, thermal insulator, and heat pump hot water heater |
-
2016
- 2016-09-08 WO PCT/JP2016/076374 patent/WO2018047261A1/en active Application Filing
- 2016-09-08 CN CN201680088931.9A patent/CN109690164A/en active Pending
- 2016-09-08 JP JP2018537925A patent/JPWO2018047261A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388253A (en) * | 2009-04-07 | 2012-03-21 | 夏普株式会社 | Vacuum insulation material and appliance provided therewith |
| WO2011016696A2 (en) * | 2009-08-07 | 2011-02-10 | Lg Electronics Inc. | Vacuum insulation member, refrigerator having vacuum insulation member, and method for fabricating vacuum insulation member |
| JP2011236953A (en) * | 2010-05-10 | 2011-11-24 | Hitachi Appliances Inc | Vacuum heat insulating material, heat insulating box and refrigerator using the same |
| CN103574229A (en) * | 2012-07-27 | 2014-02-12 | 日立空调·家用电器株式会社 | Vacuum heat insulating material, refrigerator and device employing vacuum heat insulating material |
| JP2015145696A (en) * | 2014-02-03 | 2015-08-13 | 三菱電機株式会社 | Vacuum heat-insulating material, heat-insulating box using vacuum heat-insulating material, and method for manufacturing vacuum heat-insulating material |
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| Publication number | Publication date |
|---|---|
| WO2018047261A1 (en) | 2018-03-15 |
| JPWO2018047261A1 (en) | 2019-04-11 |
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