CN1188630A - Low thermal conductivity gas-filled thermal inuslation material - Google Patents
Low thermal conductivity gas-filled thermal inuslation material Download PDFInfo
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- CN1188630A CN1188630A CN97114371A CN97114371A CN1188630A CN 1188630 A CN1188630 A CN 1188630A CN 97114371 A CN97114371 A CN 97114371A CN 97114371 A CN97114371 A CN 97114371A CN 1188630 A CN1188630 A CN 1188630A
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- thermal conductivity
- inuslation
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Abstract
A low thermal conductivity gas-filled thermal insulation material, having a double-walled structure with a thermal insulation space layer filled with a low thermal conductivity gas having a thermal conductivity less than that of air provided between an inner wall and an outer wall, wherein the thickness of the thermal insulation space layer is set to be such that the inner wall and the outer wall are capable of achieving contact when a space between the inner wall and the outer wall is made vacuum and an outside of the outer wall is held at atmospheric pressure, within a range of elastic deformation allowing return to an original position. This low thermal conductivity gas-filled thermal insulation material can be economically produced, is compact and lightweight, and is suitable for use with containers having unusual non-cylindrical designs.
Description
The present invention relates to a kind of low thermal conductivity gas-filled thermal inuslation material that is used for cool-bag, as be used to be incubated the heat-barrier material of lunch box, cool-bag and insulation cover thereof and warming plate or analog.This application is that the Japan Patent of 8-321944 is the basis with the number of patent application, and its content is as the application's list of references.
Common its structure of synthetic resin cool-bag is that the gas that fills a kind of low heat conductivity in the inner housing of synthetic resin and the interlayer between the shell body forms the insulation interlayer, as xenon, krypton gas or argon gas.
In order to make this resin cool-bag, the air between the two housings of this container in the formed inner space is extracted out or by the air-filled pore on the cool-bag air is discharged by vavuum pump, charges into the gas of low heat conductivity by this hole, seals this air-filled pore then.When vacuumizing, atmospheric pressure acts on chamber wall, and it is pushed towards described direction in space.Therefore, if the material of chamber wall is too soft, then container can be flattened so that damage.So container two walls adopt thickened material usually, and are arc, or be provided with reinforcement and make it have enough intensity to bear atmospheric pressure.With regard to non-cylinder or non-spheroid, as polyhedral body, plane body or ellipsoid, these measures need special consideration, because these shapes cause inner housing and shell body can not form enough bearing strengths in its vertical surface.
, this is theoretic method for designing, and in actual applications, because density of material is not enough and the weight of cool-bag is too big, often heat insulation effect does not reach requirement, and manufacturing and material cost are all higher.This does not depend on the shape of container, for general tabular thermal insulation board, and uses metal material to have same problem in heat insulation container yet.
Consider above-mentioned situation, the object of the present invention is to provide a kind of economy, that density is high, lightweight low thermal conductivity gas-filled thermal inuslation material, this material can be used for the design of special non-cylindrical container.
Low heat conductivity inflatable heat-insulating material of the present invention, insulating sandwich space with a double-walled construction, be filled with the gas lower in the interlayer than air thermal conductivity, the thickness in this insulating sandwich space, with it when vacuumizing, the outer surface of shell can return in strain within the scope of origin-location under atmospheric pressure, and the shell physical efficiency contacts with inner housing and is as the criterion.
Low heat conductivity inflatable heat-insulating material of the present invention, when the internal pressure in insulating sandwich space and atmospheric pressure about equally the time, at least inner housing and a housing in the shell body be provided with can separate be connected the protection part.
Low heat conductivity inflatable heat-insulating material of the present invention has one to be connected the protection part at least in the adjacent coupling part of inner housing and shell body.
The inside and outside housing of low heat conductivity inflatable heat-insulating material of the present invention can be to be mixed and made into by one or more resin materials, and these materials can be polyethylene, polypropylene, polycarbonate, polystyrene, ABSs, polyester, polyamide, polyimides, polyketone, poly ethylene vinyl alcohol, polyvinyl alcohol, and polysulfones etc.
Low heat conductivity inflatable heat-insulating material of the present invention, inner housing is the band cylindrical inner pressurd vessel at the end, and shell body is than the cylindrical outer container at the bottom of the big band of inner pressurd vessel, and this heat-insulating material is the double-walled container that the inner and outer shell intake section is connected as a single entity and forms.
Low heat conductivity inflatable heat-insulating material of the present invention can be established a sealable evacuation aperture in the bottom of outer container, seal cover is fixed near the periphery of steam vent.
Has following effect at above-mentioned this low heat conductivity inflatable heat-insulating material.
Owing to when charging into low thermal conductivity gas, do not need to use any special device to eliminate pressure differential, so the manufacturing cost of this material is lower.
Because this material allows strain, so can make material in light weight, that density is high and inner and outer shell is very thin.
Because the increase of density of material, can make and comprise different shape tabular, polygonal.
Connect safeguard measure owing to adopt, when vacuumizing, can prevent that the coupling part of inner and outer shell from producing strain stress, and reduce the damage that causes container because of the damage of inlet.
When being used for cool-bag, be provided with connection protection part in the porch of inner and outer shell, this connection protection part is located at the flange place usually.Furthermore, because this structure allows one section flange with increase of container to cooperate, and the thermal energy conduction of this part reduces, and therefore, can improve the heat-proof quality of container.
In addition, when connecting the inlet of inner and outer shell, this connections protection part can play the effect of location, make inner and outer shell can be easily, connection exactly.
Charge into after the low thermal conductivity gas,, therefore can not reduce heat-insulating property because inner and outer shell does not contact.
Fig. 1 is the local positive cut-away view of the embodiment of low thermal conductivity gas-filled thermal inuslation material of the present invention.
Fig. 2 is the partial side cut-away view of the embodiment of identical heat-barrier material.
Fig. 3 is that the major part of the embodiment of identical heat-barrier material is amplified cut-away view.
Fig. 4 is when vacuumizing, the interactional cut-away view of two walls of the embodiment of identical heat-barrier material.
Heat-barrier material of the present invention comprises metal material, synthetic resin material, and similar material, and tool The pair of lamina space structure is arranged. Be filled with a kind of gas lower than air thermal conductivity at the adiabatic space layer. In addition, originally Invent the heat-barrier material of described low heat conductivity, when vacuumizing, the outer wall of shell under atmospheric effect, Inner and outer shell produces recoverable strain so that be in contact with one another.
Under atmospheric pressure P effect, allow inner and outer shell to produce distortion, when vacuumizing, the atmospheric pressure difference of thermal insulation layer is 1kg/cm2, this moment, inner and outer shell produced recoverable strain so that be in contact with one another, as Fruit should surpass to a certain degree in distortion, then resilient not.
This shows that if thermal insulation layer is too thick, when vacuumizing, subsiding and rupturing appears in housing easily. Advance one Step when making this material, at first should vacuumize, and makes the surface generation of inner and outer shell can recover former The strain of the shape of coming is filled with the gas of low heat conductivity then so that be in contact with one another to thermal insulation layer, eliminate The pressure differential of thermal insulation layer and space outerpace has just been made this non-damageable heat-barrier material thus.
In this case, the blowing pressure atmospheric pressure best and under the room temperature (20-30 ℃) is close.
In the situation of considering external temperature, no matter in the winter time cold area minimum temperature is subzero 30 ℃, or in the summer automobile be up to 80 ℃ the time, draw according to the Boyle-Charles theorem, the adiabatic space internal pressure be changed to 0.8-1.2kg/cm2, the heat-insulating material of therefore making in this way can make usually With. Therefore the gross pressure changing value is about ± 0.2kg/cm2, 1kg/cm when this pressure ratio vacuumizes2Pressure differential Much smaller, therefore can produce the heat-barrier material that general having is enough to deal with general application.
It should be noted that when heat-barrier material is made up of synthetic resin, two walls of housing and similar products Make, all stick with glue in its coupling part such as around the entrance and connect or welding, when practical application, by raw material The intensity of the coupling part of making must reduce. The present invention adopts between coupling part and the strain part and establishes Put a surface step that can contact, the shear stress that the two housings strain produces when therefore vacuumizing is not Can act on the coupling part. In the present invention, when the pressure in the adiabatic space layer during close to atmospheric pressure, A kind of discerptible connection protection part is located at inner housing and a upper housing of shell body at least.
By making the gap that connects the protection part as far as possible little, the shear stress of coupling part can reduce to Little, and its invigoration effect increases. In addition, when the present invention is used for cool-bag, form one with the method Connect the protection part, this connection protection part is located near the cool-bag entrance, when the entrance that enlarges inner housing Or when reducing the entrance of shell body, but can receive easily the covering container entrance near the connecting portion office Lid owing to increased the length of fit of lid, improved this sealing property, therefore improved cool-bag Heat-insulating property. When splicing or welding inner and outer shell entrance, enlarge the entrance of inner housing, or reduce shell body Entrance can be to building positioning action. In order to increase bonding strength, although connect that protection partly can be gluedd joint or Be fused on other wall, but its result has strengthened the difficulty of production technology, has increased cost.
Fig. 1-4 is depicted as the embodiment of the thin wall-type cool-bag that low heat conductivity inflatable heat-insulating material of the present invention makes.As shown in Figure 1, 2, this cool-bag 1 is made of mutual close two housings, and inner housing 2 is made by synthetic resin, be shaped as the band cylinder at the end, in their porch, shell body 1 is bigger slightly than the diameter of inner housing 2, and forms a space between inner and outer shell 2,1.By charge into the gas lower than air thermal conductivity in the space of 2,1 formation of inner and outer shell, at least a in several gases such as xenon, argon gas, krypton gas preferably is to form adiabatic space layer 3.
In addition, the outer surface that metal forming of being made up of radiation proof material 6 or metallic plate interlayer are contained in inner housing 2, purpose is to prevent heat radiation.This thermal radiation resistant material 6 both can be contained in the outer surface of inner housing 2, can be contained in the inner surface of the outer shell body 1 of inner housing 2 again.
Be provided with steam vent 7 in the bottom of shell body 1, the seal cover board 8 that this steam vent is made by the synthetic resin identical with shell body 1 is sealed, promptly with bonding agent bonding or burning-on method make cover plate seal steam vent 7 around.
The material of inner and outer shell 2,1 and seal cover board 8 does not have limited field, and they can adopt one or more hybrid resin materials, and these materials can be from polyethylene, polypropylene, polycarbonate, polystyrene, ABSs, polyester, polyamide, polyimides, polyketone, poly ethylene vinyl alcohol, polyvinyl alcohol, and select in the group of composition such as polysulfones.
As shown in Figure 4, the characteristics of this cool-bag also are, when the space of 2,1 of inner and outer shell is evacuated, the outside of shell body 1 is in atmospheric pressure following time, the setting of adiabatic space layer 3 thickness is can contact and its strain can set back and is as the criterion with inner and outer shell 2,1, further, the thickness of adiabatic space layer 3 preferably is about 2-7mm.When the thickness of adiabatic space layer 3 surpassed 7mm, inner and outer shell 2,1 contact meeting in the scope that can recover living strain was very difficult, and caused low thermal conductivity gas to produce the heat conduction.Otherwise if the thickness of adiabatic space layer 3 during less than 2mm, the pressure in the adiabatic space layer 3 are lower than atmospheric pressure, because the unexpected increase of external temperature, 2,1 of inner and outer shell is easy to contact.
Another characteristics of this cool-bag are, comprise that also a separate type connects protection part 5, and when the pressure in the adiabatic space layer approached atmospheric pressure, separable connection was protected at least one that partly is located in inner housing 2 or the shell body 1.Can know from Fig. 3 and to find out that it is 0.1-1.0mm that being connected between the inner surface of the outer surface of inner housing 2 and shell body 1 protected the spacing of part 5, is preferably 0.1-0.5mm, and the vertical range that connects the protection part is 5mm.
In an embodiment of the present invention, connect protection part 5 and be located on the inner housing 2 by forming a flange portion, this flange radially stretches out from the upper end of intake section, and flange lower diameter enlarged inwall direct and shell body 1 is close.This enlarged-diameter part promptly connects protection part 5.On the other hand, described connection protection part 5 also can be that to reduce part in shell body 1 upper end diameter close with the outer wall of inner housing 2.
When inner housing 2 and shell body 1 its coupling part glued joint or frit seal after, steam vent by the double-walled container bottom vacuumizes the space layer between inner and outer shell, atmospheric pressure P acts on housing 1,2, makes two housings produce strain and contact, as shown in Figure 4.Meanwhile, the gap that connects protection part 5 can make itself and its apparent surface's (inwall of shell body) keep almost state of contact, has avoided the distortional stress of housing to directly act on coupling part 4, and it is protected.
In the porch of housing 1,2, coupling part 4 usefulness epoxy resin adhesives glued joint, or make its sealing with thermal welding rule such as vibration welded method.
According to above-described action effect, the manufacture method of described cool-bag will further be illustrated.At first, inner housing 2 and shell body 1 usefulness synthetic resin are injection molded.Then, prepare a seal cover board 8 of forming by synthetic resin independently.At this, the upper entrance place of inner housing 2 directly forms a flange and enlarged diameter part, as shown in Figure 3.Simultaneously, also be provided with one and connect protection part 5.Be provided with steam vent 7 in the bottom of shell body 1.
In addition, at the outer surface of inner housing 2 thin plate 6 or the analog of thermal radiation resistant are housed, when with metallic plate during as the material of thermal radiation resistant, this metallic plate can be bonded in the outer surface of inner housing 2 with bonding agent or double faced adhesive tape.
In addition, with the inner housing 2 of the thin plate 6 of the thermal radiation resistant shell body 1 of packing into.The flange portion that is respectively formed at the porch of inner and outer shell aligns mutually, and with bonding agent splicing or welding the flange portion of shell body 1 and the flange portion of inner housing 2 is coupled together, and therefore, forms a space between inner and outer shell 2,1.When coupling part 4 formed, the connection protection part 5 that is located at inner housing 2 porch just can accurately, easily make inner housing 2 location.
In addition, a gas converter (not shown) is contained in the bottom of double container, and the space that is used for 2,1 of inner and outer shell vacuumizes, and charges into the low thermal conductivity gas xenon, and makes its pressure near atmospheric pressure.This gas converter has plurality of specifications, it has the gas supply mechanism that the vacuum device that links to each other with vavuum pump links to each other with cylinder with the gas that holds low heat conductivity (as xenon), therefore, this converter can be changed between two systems, at first, steam vent 7 by the double container bottom vacuumizes the space of 2,1 of inner and outer shell, then, charges into low thermal conductivity gas.
As shown in Figure 4, when the space that inner and outer shell is 2,1 vacuumizes, under atmospheric pressure p effect, inner and outer shell 2,1 strain and contact.Because the distortion of inner and outer shell 2,1 only limits within the restorability regime of elastic deformation, therefore, under the atmospheric pressure effect, inner and outer shell 2,1 can recover its distortion, and can not occur damaging or permanent deformation.In addition; connecting protection part 5; the gap of the inner surface of the outer surface of inner housing 2 and shell body 1 is 0.1-1.0mm; be preferably 0.1-0.5mm; part 5 cooperations are directly protected with being connected in the bottom of coupling part 4 on the inner housing 2; connect protection part 5 and keep almost state of contact with shell body 1 porch inwall, therefore, the distortional stress of inner and outer shell 2,1 can not act on coupling part 4.Therefore, the defective of coupling part 4 fracture and the seal failure that causes can reduce.
In addition, after by gas converter the inner space of inner and outer shell 2,1 being vacuumized, charge into low thermal conductivity gas (as xenon).This blowing pressure and atmospheric pressure are approaching.Under predetermined atmospheric pressure P effect, inner and outer shell 2,1 contact in case charge into low thermal conductivity gas, then makes inner and outer shell open in 2,1 minute and set back.
In addition, for the steam vent 7 of can body 1 bottom, with glueing joint or the method for welding makes seal cover board 8 seal the periphery in this hole.
Because above-mentioned manufacture process can produce the cool-bag shown in Fig. 1 and 2.
In above-described enforcement, inner and outer shell 2,1 is the band cylinder at the end, inner housing 2 shell body 1 of packing into, form a space between two housings, the cool-bag that the inlet of connection two housings becomes one it, we invention is not limited in this application, and it can be by being used to make various insulation materials, as warming plate, have double-deck insulation cover and similar products.
In addition, the material that constitutes inner and outer shell 2,1 is not only limited to synthetic resin, and one or two housing of inner and outer shell also can adopt metal material, as stainless steel, or adopts sheet metal.
Furtherly, described container, steam vent 7 usefulness seal cover boards 8 its peripheries of sealing in shell body 1 bottom in addition, also can clog steam vent 7 and it is solidified with bonding agent.With regard to the metal heat preservation container, can adopt the fluidity encapsulating method, as adopt point pipe or weld metal method.
For example: Figure 1 shows that a kind of cool-bag of making.Form inner and outer shell 2,1 with polycarbonate and polyethylene terephthalate synthetic resin injection molding.The thickness of adiabatic space layer is preferably 2.5mm, also can be 5mm.In addition, inner and outer shell 2,1 link position in its porch connects with epobond epoxyn.At this; it should be noted that the intake section of inner housing 2 is provided with a scalariform structure, cause between adiabatic space layer 3 (strain part) and coupling part 4, form one long for 5mm, perpendicular to the gap between two surfaces on the direction of strain direction be 0.1-0.3mm be connected protection part 5.In bonding process, connect the effect that the protection part also has the location.In addition, in order to prevent heat radiation, the outer wall of inner housing 2 is lined with double-deck banded aluminium foil 6.
For the adiabatic space layer 3 to the slim cool-bag that makes charges into the low heat conductivity xenon, should adopt gas-filled converters to vacuumize by 7 pairs of space layer of steam vent of outer container bottom.Meanwhile, under the effect of atmospheric pressure P, inner and outer shell 2,1 is towards the distortion of adiabatic space layer 3 direction, in the plat part office contact near the center.Under room temperature and atmospheric pressure, when charging into xenon, the adiabatic space layer can return to original 5mm thickness, and is unlikely damage.At last, with cyanoacrylate seal cover board 8 is gluedd joint and to make its sealing in steam vent 7 places, just finished the making of cool-bag thus.
According to the manufacture method of above-described a kind of cool-bag, below will be in the varied in thickness scope of adiabatic space layer and situation about being with or without near the coupling part of inner housing 2 porch under, carry out various forms of product testings.
Test products 1: adiabatic space layer thickness: 3mm
The protection of connection part is arranged
Planar section: do not damage
Intake section: do not damage
Test products 2: adiabatic space layer thickness: 3mm
There is not the protection of connection part
Planar section: do not damage
Intake section: do not damage
Test products 3: adiabatic space layer thickness: 7mm
The protection of connection part is arranged
Planar section: do not damage
Intake section: do not damage
Test products 4: adiabatic space layer thickness: 7mm
There is not the protection of connection part
Planar section: do not damage
Intake section: damage
Test products 5: adiabatic space layer thickness: 10mm
The protection of connection part is arranged
Planar section: distortion, zinc-plated
Intake section: do not damage
Test products 6: adiabatic space layer thickness: 10mm
There is not the protection of connection part
Planar section: distortion, zinc-plated
Intake section: damage
Claims (6)
1. low thermal conductivity gas-filled thermal inuslation material, has the pair of lamina structure, charge into the gas lower in the insulated space layer between this structure inner and outer shell than air thermal conductivity, when described space layer is vacuumized, and the outer wall of described shell body is when being in atmospheric pressure, the setting of insulated space layer thickness is as the criterion with the contact of inside and outside shell physical efficiency, and the housing strain is in recoverable scope.
2. low thermal conductivity gas-filled thermal inuslation material according to claim 1 when the internal pressure of institute's heat space layer is similar to atmospheric pressure, is provided with separable connection protection part at least on the housing in described inner and outer shell.
3. low thermal conductivity gas-filled thermal inuslation material according to claim 2, described connection protection part are forming connection protection part at least near a housing place in the inner and outer shell.
4. low thermal conductivity gas-filled thermal inuslation material according to claim 1, the material of described inner and outer shell is made up of the mixture of a kind of resin material or two or more resin materials, and resin material is selected polyethylene from following substances, polypropylene, polycarbonate, polystyrene, ABSs, polyester, polyamide, polyimides, polyketone, poly ethylene vinyl alcohol, polyvinyl alcohol, and polysulfones etc.
5. low thermal conductivity gas-filled thermal inuslation material according to claim 1, described inner housing is the band cylinder inner pressurd vessel at the end, described shell body is the band cylinder outer container at the end, shell body is bigger than inner housing, and described heat-barrier material is a kind of double-walled housing that is connected as one at its intake section by inner and outer shell.
6. low thermal conductivity gas-filled thermal inuslation material according to claim 5 is provided with the hermetically-sealed construction of a steam vent in the bottom of described shell body, a seal cover board is connected in the periphery place of described steam vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97114371A CN1188630A (en) | 1996-12-02 | 1997-12-02 | Low thermal conductivity gas-filled thermal inuslation material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP321944/96 | 1996-12-02 | ||
| CN97114371A CN1188630A (en) | 1996-12-02 | 1997-12-02 | Low thermal conductivity gas-filled thermal inuslation material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1188630A true CN1188630A (en) | 1998-07-29 |
Family
ID=5172910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97114371A Pending CN1188630A (en) | 1996-12-02 | 1997-12-02 | Low thermal conductivity gas-filled thermal inuslation material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1188630A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495515A (en) * | 2011-12-12 | 2012-06-13 | 中国科学院长春光学精密机械与物理研究所 | Heat-insulation cushion applicable to heat control of space camera |
| CN114754566A (en) * | 2022-06-15 | 2022-07-15 | 北京林电伟业电子技术有限公司 | Pressure steam sterilizer and steam communication sterilization loading vehicle |
-
1997
- 1997-12-02 CN CN97114371A patent/CN1188630A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495515A (en) * | 2011-12-12 | 2012-06-13 | 中国科学院长春光学精密机械与物理研究所 | Heat-insulation cushion applicable to heat control of space camera |
| CN102495515B (en) * | 2011-12-12 | 2014-01-15 | 中国科学院长春光学精密机械与物理研究所 | Heat-insulation cushion applicable to heat control of space camera |
| CN114754566A (en) * | 2022-06-15 | 2022-07-15 | 北京林电伟业电子技术有限公司 | Pressure steam sterilizer and steam communication sterilization loading vehicle |
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