CN106794413B

CN106794413B - Gas adsorption device and vacuum heat insulation member using the same

Info

Publication number: CN106794413B
Application number: CN201680002317.6A
Authority: CN
Inventors: 谷口里纱; 山本直树; 嶋和也
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2015-06-24
Filing date: 2016-06-23
Publication date: 2021-04-23
Anticipated expiration: 2036-06-23
Also published as: WO2016208193A1; CN106794413A

Abstract

The invention provides a gas adsorption device (4) comprising: the gas-permeable and gas-permeable wrapping bag comprises a wrapping bag (5) having gas-barrier properties and flexibility, a gas-adsorbing material (6) which is pressure-reduced and sealed in the wrapping bag (5), and a porous member (7) which is arranged in the interior of the wrapping bag (5) in a planar state adjacent to the gas-adsorbing material (6). This makes it possible to provide a vacuum heat insulator which is thin and flexible, can be applied to various vacuum heat insulators, and can maintain gas adsorption capacity for a long period of time, with high productivity and at low cost.

Description

Gas adsorption device and vacuum heat insulation member using the same

Technical Field

The present invention relates to a gas adsorbing device and a vacuum heat insulating member using the same.

Background

In recent years, energy saving for household electrical appliances has become an urgent issue from the viewpoint of global warming prevention. In particular, in heat and cold insulation equipment such as refrigerators, freezers, and vending machines, heat insulating materials having excellent heat insulating properties are required from the viewpoint of effective utilization of heat.

As a heat insulating material having excellent heat insulating performance, a vacuum heat insulating material has been proposed. This is a heat insulator produced by housing a core material, such as glass wool, having a high gas phase volume ratio and constituting fine voids in a laminated film (hereinafter referred to as an outer covering) having a gas barrier property, which is processed into a bag shape, and by depressurizing and sealing the core material housing space.

In the vacuum heat-insulating material, high-performance heat-insulating performance can be obtained by increasing the degree of vacuum in the vacuum heat-insulating material. However, increasing the degree of vacuum is hampered by the presence of gas inside the vacuum insulation. The gas existing inside the vacuum heat-insulating member can be roughly classified into the following three types. One is gas remaining without being decompressed and exhausted in the production of the vacuum heat insulator, the other is gas generated from the core material and the sheathing material (gas adsorbed to the core material and the sheathing material, gas generated by reaction of unreacted components of the core material, and the like) after decompression sealing, and the last is gas entering from the outside through the sheathing material.

In order to adsorb and remove these gases, a gas adsorbing device is hermetically sealed together with the core material in the outer cover of the vacuum heat insulating material.

The gas adsorbing device is configured by filling a gas adsorbing material in a gas barrier container and vacuum-sealing the gas barrier container (see, for example, patent document 1).

Fig. 21 is a diagram showing a structure of a conventional gas adsorbing device 1100 disclosed in patent document 1.

The conventional gas adsorbing device 1100 is configured as follows: in a vacuum or argon atmosphere, a gas adsorbing material 1102 is filled in a metal cylindrical gas barrier container 1101, and a molten glass sealing material 1105 is made to flow into a narrow portion 1104 provided at an opening 1103 of the gas barrier container 1101 under reduced pressure, and is cooled and solidified. Thereby, the opening 1103 of the gas barrier container 1101 is sealed.

In the conventional gas adsorbing device 1100, when it is stored before being applied to a vacuum heat insulating material, the gas adsorbing material 1102 in the gas barrier container 1101 is isolated from the external atmosphere, and therefore, the performance of the gas adsorbing material can be prevented from being deteriorated. When applied to a vacuum heat insulator, external force is applied to the gas-tight container 1101 from the outside of the outer cover of the vacuum heat insulator, and the glass sealing material 1105 is broken to communicate the inside and outside of the gas-tight container 1101. Thereby, the gas adsorbing member 1102 adsorbs gas existing in the outer cover.

In this way, the gas adsorbing device 1100 adsorbs the gas in the enclosure of the vacuum heat insulating material to maintain the degree of vacuum, and the vacuum heat insulating material can exhibit excellent heat insulating performance.

In the conventional gas adsorbing device 1100, glass is melted and then flows into the narrowed portion 1104 of the gas barrier container 1101, and the molten glass is retained and joined on the inner surface of the narrowed portion 1104 by surface tension. Thereafter, the molten glass is cooled and solidified while being held in the narrow portion 1104, whereby the narrow portion 1104 is sealed. Therefore, time for melting and cooling solidification of glass is required, so that it is difficult to improve productivity. Meanwhile, in order to control the melt viscosity of the glass with high accuracy, a special and expensive vacuum heat treatment furnace or the like is required. There is a problem in that cost reduction of the gas adsorption device 1100 is difficult.

In addition, in the glass sealing material 1105 damaged by the application of an external force, the inside of the gas barrier container 1101 and the inside of the outer covering of the vacuum heat insulator communicate with each other through the split portion. At this time, in order to generate a crack for communicating the inside and outside of the gas barrier container 1101, the glass sealing material 1105 needs to be a block having a certain thickness. In order to ensure a flow path for the gas generated when the gas adsorbing member 1102 is heat-treated and the gas generated when activated, the opening of the narrowed portion 1104, which is the sealing opening of the gas barrier container 1101, needs to have a certain cross-sectional area. From these viewpoints, it is also necessary to form the glass sealing material 1105, which is melt-sealed in the narrowed portion 1104, into a block having a certain thickness.

Therefore, the gas barrier container 1101 has at least the thickness of the glass sealing material 1105 and the thickness of the plate thickness portion of the gas barrier container 1101, and there is a limit to making the thickness thinner.

Further, since the gas adsorbing device 1100 includes the glass sealing material 1105 having a high melting temperature, the gas barrier container 1101 needs to be made of a material capable of withstanding a high temperature, for example, a metal, and to be a rigid body. Therefore, the vacuum heat insulator cannot be deformed in accordance with the shape of the equipment to be used, and there is a limitation in flexibility, and there is a problem in that the applicable equipment is limited.

On the other hand, recently, as the heat insulating performance of the vacuum heat insulator is improved, the vacuum heat insulator having a thickness of about several millimeters and the vacuum heat insulator processed into a curved surface or a cylindrical shape and used for, for example, a water heater are also commercialized according to the required heat insulating capability of the equipment to be used. Thus, there is a demand for a gas adsorbing device that can be applied to a new vacuum heat insulating material that is commercialized, and the demand for such a gas adsorbing device is increasing.

Further, the use of vacuum heat-insulating materials is expanding from heat-insulating materials for heat-and cold-insulation equipment such as conventional refrigerators to heat-insulating materials for building materials, LNG ships, and the like in recent years. Therefore, the vacuum heat-insulating material itself is also required to be large-sized and to be able to maintain high heat-insulating performance for a longer period of time. Therefore, it is also a problem to increase the filling amount of the gas adsorbing material.

However, if the configuration of the conventional gas adsorbing device 1100 is not changed when the filling amount of the gas adsorbing material is increased, the amount of gas generated when the gas adsorbing material is heat-treated and the amount of gas generated when the gas adsorbing material is activated increase, and a large amount of time is required for the heat treatment, which leads to a decrease in productivity.

Therefore, it is an object to increase the filling amount of the gas adsorbing material without lowering the productivity, or to increase the filling amount of the gas adsorbing material while improving the productivity.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-68323

Disclosure of Invention

The present invention has been made in view of the above problems, and an object thereof is to provide a gas adsorbing device which is thin and flexible with high productivity, can increase the filling amount of a gas adsorbing material, and can maintain the gas adsorbing ability for a long time, and a vacuum heat insulating material using the same.

The gas adsorption device of the present invention comprises: the gas-adsorbing member is provided with a covering bag having gas barrier properties and flexibility, a gas-adsorbing member that is pressure-reduced and sealed in the covering bag, and a porous member that is arranged in the covering bag in a planar state adjacent to the gas-adsorbing member.

In the present invention, the "porous member disposed adjacent to the gas adsorbing material in a planar state" means that, of the surfaces constituting the porous member, the surface other than the surface having the largest area is disposed adjacent to the gas adsorbing material.

In the present invention, "adjacent arrangement" includes not only a case where the gas adsorbing material and the porous member are arranged adjacent to each other in a contact state, but also a case where the gas adsorbing material and the porous member are arranged adjacent to each other with some member interposed therebetween, for example, a case where the gas adsorbing material and the porous member are arranged adjacent to each other with a moisture adsorbing material interposed therebetween as exemplified in embodiment 2.

In the present invention, the "shape" of the porous member may be, for example, a shape other than a flat plate such as a polyhedron or a cylinder.

Thus, the gas adsorbing device of the present invention can be produced by heat fusion after pressure reduction by a general vacuum extractor. When the wrapping bag inserted with the gas adsorbing material is decompressed and sealed, the gas adsorbing material in the wrapping bag can be prevented from sucking and exhausting gas from the inside of the wrapping bag due to the existence of the porous material by sucking and decompressing the wrapping bag from the porous material side to the gas adsorbing material side. This enables the production without using a special apparatus, and the vacuum sealing can be performed without reducing the evacuation speed, thereby improving the productivity and providing the vacuum sealing at low cost.

The gas adsorbing material and the porous member are disposed adjacent to each other in a planar state in the flexible envelope. Therefore, compared to the case where the gas adsorbing material and the porous member are arranged in a stacked state (arranged in a state where the surfaces having the largest areas of the gas adsorbing material and the porous member are in contact with each other), the thickness is smaller, and deformation such as bending is easier, and the present invention can be applied to a thin vacuum heat insulating material of several millimeters or so, a vacuum heat insulating material used by being bent in an arc shape, and the like.

Further, by increasing the planar width of the covering bag, the amount of the gas adsorbing material can be increased while keeping the thickness thin, and a material capable of maintaining the gas adsorbing ability for a long time can be obtained. That is, the gas adsorption capability can be maintained for a long time while expanding the application to various vacuum heat-insulating materials.

As described above, the present invention can provide a gas adsorbing device which has high productivity, can be provided at low cost, can be applied to various vacuum heat insulating materials because of being thin and flexible, and can further maintain gas adsorbing ability for a long time, and a vacuum heat insulating material using the same.

The 1 st aspect of the present invention is a gas adsorbing device comprising: the gas-adsorbing member is provided with a covering bag having gas barrier properties and flexibility, a gas-adsorbing member that is pressure-reduced and sealed in the covering bag, and a porous member that is arranged in the covering bag in a planar state adjacent to the gas-adsorbing member.

Thus, the gas adsorbing device can be manufactured by performing pressure reduction using a general vacuum extractor and then performing heat fusion. When the inside of the cover bag into which the gas adsorbing material is inserted is depressurized and sealed, the inside of the cover bag is depressurized by suction from the porous material side toward the gas adsorbing material side, whereby the gas adsorbing material in the cover bag can be prevented from sucking and exhausting gas from the inside of the cover bag due to the presence of the porous material. Therefore, the vacuum packaging can be manufactured without using a special device, the vacuum packaging can be performed without slowing down the vacuum-pumping speed, the productivity can be improved, and the vacuum packaging can be provided at low cost.

Further, since the gas adsorbing material and the porous member are disposed adjacent to each other in a planar state in the flexible covering bag, the thickness can be made thinner and deformation such as bending can be facilitated as compared with a case where the gas adsorbing material and the porous member are disposed in a stacked state. This makes it possible to apply to a thin vacuum heat insulator of several millimeters or so, a vacuum heat insulator used by bending into an arc shape, and the like. Further, by increasing the planar width of the wrapping bag, the amount of the gas adsorbing material can be increased while keeping the thickness thin, and the gas adsorbing ability can be maintained for a long time.

Next, according to the invention of claim 2, in the invention of claim 1, an intersecting surface portion of the porous member that intersects a surface adjacent to the gas adsorbing material is joined to the wrapping bag.

In the present invention, "bonding" includes not only bonding between the inner surface of the cover bag and the surface of the porous member by thermal fusion or by an adhesive or the like, as described in the embodiments, but also pressing the surface of the porous member against the surface of the porous member by atmospheric pressure or an external force.

Thus, if the cover bag is perforated at the cross-over portion of the porous member in order to communicate the inside of the vacuum heat insulator with the inside of the gas adsorbing device, gas from the outside of the cover bag passes through the inside of the porous member and is adsorbed by the gas adsorbing device. Thus, the gas adsorption rate of the gas adsorbing material can be arbitrarily set and controlled by the pore diameter and porosity of the porous member. As a result, while the effect of the above-described embodiment 1 is obtained, the variation width of the gas adsorption rate is reduced to stabilize the adsorption performance, and the gas adsorption rate can be reduced to maintain the gas adsorption capacity for a longer period of time.

That is, in a configuration in which a glass sealing material is crushed and connected as in a conventional gas adsorbing device, since a connection area due to a crack formed by crushing cannot be determined, a case where a gas adsorbing speed is high and a case where a gas adsorbing speed is low are mixed, and a variation width thereof is likely to increase. Even if the variation width can be made within the design dimension range, it is difficult to stabilize the gas adsorption performance by further reducing the variation width. Further, it is difficult to maintain the gas adsorption capacity for a long period of time by lowering the gas adsorption rate to a low level while limiting the communication area due to the slit to a certain value or less.

However, according to this aspect, the gas adsorbing material adsorbs the gas via the porous member while exhibiting the effects described in aspect 1. Thus, by controlling the pore diameter and porosity of the porous member, the gas adsorption rate can be made substantially constant with a small variation. Further, further stabilization of the gas adsorption performance and a long period of time for maintaining the gas adsorption performance can be achieved at the same time.

The 3 rd aspect of the present invention is configured such that, in the 2 nd aspect, the intersecting surface portion of the porous member is heat-welded to the inner surface of the covering bag.

In this way, the intersecting surface portion of the porous member and the inner surface of the covering bag are physically integrated over the entire surface thereof, and therefore, the gas flowing in through the holes formed in the intersecting surface portion of the porous member reliably passes through the inside of the porous member and is then adsorbed by the gas adsorbing material. Therefore, the effect of embodiment 2 can be more reliably obtained.

The 4 th aspect is configured such that, in any one of the 1 st to 3 rd aspects, the covering bag is formed of a multi-layered laminated film including a gas barrier layer containing a metal foil, and the innermost film member and the porous member of the multi-layered laminated film are thermally welded to each other.

Thus, the inner surface of the covering bag and the porous member are reliably bonded to each other without any gap over the entire surface thereof by the fusion of the resins. In addition, when the cover bag is sealed, the inner surface of the cover bag and the surface of the porous member can be joined together at the same time as the fusion-bonding sealing of the cover bag, and thus, the performance stability can be improved and the productivity can be improved.

The 5 th aspect is configured such that, in any one of the 1 st to 3 rd aspects, the porous member is formed by sintering resin powder.

Thus, the porous member is not cracked by an external force at the time of perforation, and gas can be prevented from leaking and being adsorbed on the gas adsorbing member through the cracked portion. Therefore, the gas adsorbing material can adsorb gas through the pores of the porous member without fail, and stabilization of the gas adsorbing performance can be promoted.

In the 6 th aspect, in any one of the 1 st to 5 th aspects, the porous member has a porous structure through which the gas passes but powder particles of the gas adsorbing material cannot pass.

Thus, when the inside of the bag is depressurized and sealed, the gas adsorbing material in the bag can be reliably prevented from being discharged from the inside of the bag through the porous member, and the effect of the 1 st aspect, that is, the effect of preventing the gas adsorbing material from being discharged from the bag at the time of depressurization and sealing can be further ensured.

In embodiment 7, in any one of embodiments 1 to 6, the gas adsorbing material is a copper ion-exchanged ZSM-5-type zeolite.

Thus, the copper ion-exchanged ZSM-5 zeolite having a gas adsorption capacity larger than that of a conventional gas adsorption device can be exhibited, and a good gas adsorption performance can be exhibited over a long period of time.

In the 8 th aspect, in the 4 th aspect, the laminated film forming the covering bag further includes a protective layer covering a surface of the gas barrier layer.

Thus, since the metal foil serving as the gas barrier layer is protected by the protective layer, the metal foil can be prevented from being accidentally broken when the film covering the bag receives an unnecessary external force, and the deterioration of the gas adsorbing material during storage can be reliably prevented.

In the 9 th aspect, the protective layer is made of PET (polyethylene terephthalate) or a resin having a water absorption rate equal to or less than that of PET in the 8 th aspect.

This prevents the protective layer from absorbing moisture in the atmosphere when the gas adsorbing device is stored, and when the gas adsorbing device is applied to a vacuum heat insulating material or the like, moisture is released in an enclosure such as the vacuum heat insulating material, and the degree of vacuum in the enclosure is reduced, or the gas adsorbing ability of the gas adsorbing material is consumed for the moisture absorption. Therefore, the gas adsorption performance can be maintained for a longer period of time, and the thermal insulation performance of a vacuum thermal insulation material or the like to which the gas adsorption device is applied can be maintained good.

In the 10 th aspect, in any one of the 1 st to 9 th aspects, a moisture adsorbing material is provided between the gas adsorbing material and the porous member.

Thus, the gas from the porous member passes through the moisture adsorbing material and is adsorbed by the gas adsorbing material, and moisture contained in the gas can be adsorbed and removed. Therefore, waste of the gas adsorbing member due to moisture adsorption can be prevented, and good gas adsorption performance can be ensured and reliability can be improved in a longer time.

The 11 th aspect is a vacuum insulation member, including: the gas adsorbing device, the core material, and the sheath according to any one of aspects 1 to 10, wherein the vacuum insulation material is configured by inserting the gas adsorbing device and the core material into the sheath and performing reduced pressure sealing.

Thus, even a thin vacuum heat-insulating material having a thickness of about several millimeters or a vacuum heat-insulating material having a curvature or the like can have a gas adsorption effect, and a good heat-insulating performance can be maintained for a long time.

In the 12 th aspect, in the 11 th aspect, the gas adsorbing device is configured such that the inside of the casing and the inside of the gas adsorbing device communicate with each other by perforating a portion of the porous member.

In this way, since the gas in the vacuum heat insulator passes through the porous member and is adsorbed by the gas adsorbing material, the gas adsorbing rate of the gas adsorbing material can be arbitrarily set and controlled according to the pore diameter and porosity of the porous member. Therefore, it is possible to realize a vacuum heat-insulating material which can exhibit the effect of the embodiment 1, can maintain the gas adsorption capacity without variation and can stabilize the gas adsorption performance, and can exhibit a good heat-insulating performance for a longer period of time by reducing the gas adsorption rate.

In the 13 th aspect, in the 11 th or 12 th aspect, the gas adsorbing device has an unsealing member having a protrusion at a portion of the envelope opposite to a cross-surface portion with the porous member.

Thus, when the gas adsorbing device is vacuum-sealed in the casing of the vacuum heat insulating material, the protrusion of the unsealing member perforates the covering bag, and the gas adsorbing device inside can be communicated with the vacuum region in the casing. This prevents the gas-adsorbing material from adsorbing the outside air in the atmosphere during perforation of the covering bag and can maintain the heat insulating performance of the vacuum heat insulating material to a satisfactory level over a longer period of time.

The technical teaching of each of the following aspects may be independent of the technical teaching of each of the above-described 1 st to 13 th aspects.

The 14 th aspect of the present invention is an unsealing member for a gas adsorbing device. The unsealing member for a gas adsorbing device is provided with a holding portion that sandwiches the gas adsorbing device at one end side of a spring made of a wire material. The other end side tip is formed as a perforated portion that is perforated in the gas adsorbing device.

With this configuration, the unsealing member perforates the adsorbing material container of the gas adsorbing device with the distal end portion of the spring wire as the perforation portion. Thus, the diameter of the hole is equal to the wire diameter of the spring wire, and the hole has a constant size even if the piercing depth varies depending on the manner of application of the external force. Therefore, the gas around the adsorbing material container can be stably adsorbed at an adsorption speed without variation. Further, since the spring wire can be formed by bending only the spring wire, the material cost can be made much lower than that of the plate spring, and the number of working steps can be reduced by bending only the spring wire, so that the cost can be greatly reduced and the spring wire can be provided at a low cost.

In the 15 th aspect of the present invention, in the 14 th aspect, the spring made of a wire material is formed into a coil shape. The coil winding density on one end side is made to be denser than that on the other end side, and a grip portion for sandwiching the gas adsorbing device is configured. Further, the other end side of the coil density distribution is bent toward the holding portion, thereby forming a perforated portion for forming a hole in the gas adsorbing device.

Thus, the gripping portion can reliably grip the gas adsorbing device because the coil is wound densely. Further, the piercing portion can be pushed toward the grip portion to pierce the gas adsorbing device held by the grip portion, so that reliable piercing can be achieved.

In the 16 th aspect of the present invention, in the 14 th or 15 th aspect, the grip portion is configured to bring the coil winding wire into close contact with at least one turn.

Thereby, the spring wire material is brought into a close-contact wound state in the grip portion, and the gas adsorbing device can be strongly gripped by the close-contact wound portion. Therefore, it is possible to suppress a perforation error due to the positional displacement and the falling-off of the opening member, and more reliable perforation can be realized.

A 17 th aspect of the present invention is the 14 th to 16 th aspects, wherein the punching portion is formed by bending a distal end portion of the wire rod bent from the coiled portion toward the coil center portion toward the holding portion.

Thus, the perforated portion is formed by perforating the coil center of the coil-shaped portion, i.e., the vicinity of the coil center of the holding portion that holds the gas adsorbing device. Therefore, it is possible to prevent a perforation error such as perforation of the vicinity of the edge of the outer periphery of the gas adsorbing device where the gas adsorbing material is not present, and to reliably perforate the outer periphery.

In the 18 th aspect, in any one of the 14 th to 17 th aspects, the cross section of the wire rod is a circular or elliptical shape, and the outer peripheral surface thereof is formed in an arc shape.

Therefore, even if the envelope of the vacuum heat-insulating material is strongly pressed against the spring wire of the unsealing member by the atmospheric pressure in the state of being used for the vacuum heat-insulating material, since the outer peripheral surface of the spring wire is in the shape of an arc, stress concentration due to the corners of the leaf springs does not occur at the envelope as in the case of using the leaf springs. This prevents the casing from being broken, reliably maintains the vacuum in the vacuum heat-insulating material, and improves reliability.

The 19 th mode is a gas adsorption device. The gas adsorbing device includes a flat adsorbing material container in which a gas adsorbing material is sealed under reduced pressure, and the unsealing member according to any one of claims 14 to 18. The unsealing member is attached to the suction material container by sandwiching the suction material container by the holding portion. The suction material container is configured to be pushed into the suction material container through the piercing hole, so that the suction material container can be pierced.

Thus, the gas adsorbing device can form perforations with small variations in the adsorbing material container, and can stably adsorb gas around the adsorbing material container. Further, the gas adsorbing device can be provided at a low cost due to the reduction in cost of the unsealing member.

In addition, according to the 20 th aspect, in the 19 th aspect, the adsorbing material container is formed of a bag made of a laminated film having gas barrier properties, and the opening of the bag is sealed, the gas adsorbing material is sealed under reduced pressure, and the opening of the bag is formed as a thin portion having only a laminated film layer.

Thus, the holding portion of the unsealing member can be easily inserted into and held by the adsorbing material container of the gas adsorbing device from only the thin portion of the laminated film layer, and the work efficiency can be improved.

The 21 st aspect is configured such that, in the 19 th or 20 th aspect, a porous member that allows gas to pass therethrough but does not allow powder particles of the gas adsorbing material to pass therethrough is inserted into the adsorbing material housing container, and the gas adsorbing material and the porous member are sealed under reduced pressure, and are adjacent to each other in a planar state.

In this case, when the bag serving as the adsorbing material container into which the gas adsorbing material is inserted is depressurized and sealed, the gas adsorbing material in the bag is sucked and depressurized from the porous member side toward the gas adsorbing material side, and the gas adsorbing material in the bag is prevented from being sucked and exhausted from the bag due to the presence of the porous member. Therefore, the gas adsorbing material can be manufactured without using a special device, unnecessary suction and exhaust of the gas adsorbing material can be prevented, and the gas adsorbing material can be vacuum-sealed without reducing the vacuum-pumping speed, so that the productivity can be improved, and the gas adsorbing material can be provided at low cost.

Further, since the gas adsorbing material and the porous member are disposed adjacent to each other in a planar state in the flexible adsorbing material housing container, the thickness can be made thinner and deformation such as bending can be facilitated as compared with a case where the gas adsorbing material and the porous member are disposed so as to overlap each other. Therefore, the present invention can be applied to a vacuum heat insulator that is thin by several millimeters or more and a vacuum heat insulator that is used by being curved into an arc shape. Further, by increasing the planar width of the adsorbing material container, the gas adsorbing material can be increased while keeping the thickness thin, and the gas adsorbing capability can be maintained for a long time.

The 22 nd aspect is configured such that, in the 21 st aspect, the unsealing member is attached so as to perforate the porous member portion of the absorbent material container.

Thereby, the gas adsorbing device adsorbs the surrounding gas via the porous member. Therefore, the gas adsorption rate of the gas adsorbing member can be arbitrarily set and controlled according to the pore diameter of the porous member. It is possible to realize a gas adsorbing device that can exhibit good gas adsorbing performance for a longer period of time while achieving the productivity improving effect and the like of the above-described embodiment 21 and further stabilizing the gas adsorbing performance without variation and maintaining the gas adsorbing performance by reducing the gas adsorbing rate.

The 23 rd aspect is configured such that, in the 22 nd aspect, a moisture adsorbing material is provided between the gas adsorbing material and the porous member.

Thus, even if the gas adsorbing device contains moisture from the gas adsorbed in the surroundings, the moisture can be adsorbed and removed by the moisture adsorbing member. Therefore, waste of the gas adsorbing material due to moisture adsorption can be prevented, and a gas adsorbing device having high reliability can be obtained by ensuring good gas adsorbing performance for a longer period of time.

A 24 th aspect is any one of the 21 st to 23 th aspects, wherein the bag constituting the adsorbing material container is formed of a multilayer laminated film including a gas barrier layer containing a metal foil, and the innermost film member and the porous member are made of resin materials that are heat-weldable to each other and are heat-weldable.

Thus, the inner surface of the bag constituting the suction material container and the porous member are securely bonded to each other without any gap by fusion between the resins. Therefore, the adsorbed gas does not leak through the gap between the laminated film forming the bag and the porous member, and the performance stability can be improved. Further, when the bag is sealed, the bag can be sealed by welding, and the inner surface of the bag and the surface of the porous member can be joined together, thereby improving the productivity.

The 25 th mode is a vacuum heat insulator. The vacuum heat insulator is configured by inserting the gas adsorbing device described in any of the 19 th to 24 th aspects together with a core material into an outer cover and performing reduced pressure sealing.

Thus, the gas adsorbing device stably and reliably adsorbs gas, thereby stably exhibiting excellent vacuum heat insulating performance for a long period of time. Further, as described above, since the cost of the unsealing member is reduced, it is possible to provide the unsealing member at a low cost.

The 26 th aspect is an apparatus using the vacuum heat insulator according to the 25 th aspect.

Accordingly, the vacuum heat insulating effect of the vacuum heat insulating material stably exhibited over a long period of time enables realization of a device having excellent heat insulating performance, and the cost of the opening portion is reduced, so that the device can be provided at a low cost.

Drawings

Fig. 1 is a view showing a cross-sectional structure of a vacuum heat insulator using a gas adsorbing device according to embodiment 1 of the present invention.

Fig. 2 is a schematic diagram showing a structure of a gas adsorbing device according to embodiment 1 of the present invention when viewed from the side.

Fig. 3 is a plan view of the gas adsorbing device in embodiment 1 of the present invention.

Fig. 4 is an enlarged view of a main part schematically showing the structure of the gas adsorbing device in embodiment 1 of the present invention.

Fig. 5 is an enlarged cross-sectional view showing a film structure of a covering bag of a gas adsorbing device according to embodiment 1 of the present invention.

Fig. 6 is a view schematically showing a state in which the gas adsorbing device according to embodiment 1 of the present invention is mounted with the unsealing member.

Fig. 7 is a schematic view for explaining a method of manufacturing a vacuum heat-insulating material in which a gas adsorbing device in embodiment 1 of the present invention is hermetically sealed in an enclosure.

Fig. 8 is a side view schematically showing the structure of the gas adsorbing device according to embodiment 2 of the present invention.

Fig. 9 is a side view showing the structure of a gas adsorbing device according to embodiment 3 of the present invention.

Fig. 10 is a cross-sectional view showing the structure of the unsealing member for a gas adsorbing device and the vacuum heat-insulating material with a gas adsorbing device using the unsealing member in embodiment 4 of the present invention.

Fig. 11 is a schematic view showing a configuration seen from the side in a state where the unsealing member for a gas adsorbing device and the gas adsorbing device in embodiment 4 of the present invention are mounted.

Fig. 12 is an enlarged sectional view schematically showing the film structure of the housing container of the gas adsorbing device according to embodiment 4 of the present invention.

Fig. 13 is an enlarged schematic view showing a cross-sectional configuration of a gas adsorbing device in embodiment 4 of the present invention in a state where the unsealing member for a gas adsorbing device and the gas adsorbing device are mounted.

Fig. 14 is a plan view showing a state where the unsealing member for a gas adsorbing device and the gas adsorbing device according to embodiment 4 of the present invention are mounted.

Fig. 15 is a perspective view showing a state where the unsealing member for a gas adsorbing device and the gas adsorbing device according to embodiment 4 of the present invention are mounted.

Fig. 16 is a perspective view showing an external appearance of the unsealing member for a gas adsorbing device in embodiment 4 of the present invention.

Fig. 17 is a schematic view for explaining a method of manufacturing a vacuum heat insulating material in which a gas adsorbing device according to embodiment 4 of the present invention is hermetically sealed in an enclosure.

Fig. 18 is a plan view showing a state where the unsealing member for a gas adsorbing device and the gas adsorbing device according to embodiment 5 of the present invention are mounted.

Fig. 19 is a schematic diagram showing an enlarged cross-sectional configuration of a state in which the unsealing member for a gas adsorbing device and the gas adsorbing device in embodiment 5 of the present invention are mounted.

Fig. 20 is a schematic diagram showing an enlarged cross-sectional configuration of a state in which the unsealing member for a gas adsorbing device and the gas adsorbing device according to embodiment 6 of the present invention are mounted.

Fig. 21 is a diagram showing a structure of a conventional gas adsorbing device described in patent document 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

(embodiment 1)

First, embodiment 1 of the present invention will be described.

Fig. 1 is a view showing a cross-sectional structure of a vacuum heat insulator using a gas adsorbing device according to embodiment 1 of the present invention, fig. 2 is a schematic view showing the structure of the gas adsorbing device as seen from the side, fig. 3 is a plan view of the gas adsorbing device, fig. 4 is an enlarged view of a main part schematically showing the structure of the gas adsorbing device, and fig. 5 is an enlarged cross-sectional view showing a film structure of a covering bag of the gas adsorbing device. Fig. 6 is a view schematically showing a state in which an unsealing member is attached to a gas adsorbing device in embodiment 1 of the present invention, and fig. 7 is a schematic view for explaining a method of manufacturing a vacuum heat insulating material in which the gas adsorbing device is hermetically sealed in an enclosure. Fig. 6 shows a structure when a line 6-6 in fig. 3 is viewed from the direction of an arrow.

As shown in fig. 1, the vacuum heat insulator 1 of the present embodiment is configured by placing the gas adsorbing device 4 together with the core material 3 inside the casing 2, and then performing pressure reduction sealing so that the inside of the gas adsorbing device 4 and the inside of the casing 2 communicate with each other. Although not shown, a moisture adsorbent may be provided inside the cover 2 together with the core material 3 and the gas adsorbing device 4. The moisture adsorbent adsorbs moisture (water vapor) remaining or entering the vacuum heat-insulating material. Although not particularly limited, a chemisorption substance such as calcium oxide or magnesium oxide, a physisorption substance such as zeolite, or a mixture thereof can be used as the moisture adsorbent.

As shown in fig. 2, the gas adsorbing device 4 is configured by inserting a porous member 7 together with a gas adsorbing material 6 into a flexible covering bag 5 having gas barrier properties, and sealing the bag under reduced pressure. The gas adsorbing material 6 and the porous member 7 are configured to be disposed adjacent to each other in a planar state.

The gas adsorbing material 6 and the porous member 7 are disposed at different portions in the longitudinal direction of the gas adsorbing material 4.

Further, as shown in fig. 2 and 3, the gas adsorbing device 4 has an unsealing member 9 having a protrusion 8 (see fig. 6) at a portion of the envelope 5 facing the intersecting surface portion 7a of the porous member.

Here, the covering bag 5 of the gas adsorbing device 4 is formed by thermally bonding at least three laminated films (films 10) having a high gas barrier property, for example, as shown in fig. 5, at least a protective layer 10a on the outermost layer, a gas barrier layer 10b in the middle, and a bonding layer 10c on the innermost layer, into a bag shape.

In the present embodiment, as the covering bag 5, as shown in fig. 3, the peripheries of two laminated films are formed into a bag shape by thermal welding (light gray portion). However, the covering bag 5 of the present invention is not limited to this configuration, and may be formed in any form such as a bag shape from a single laminated film.

On the other hand, the joining layer 10c composed of the innermost film member among the films 10 is a layer in which the outer peripheral portions of the films 10 are firmly joined by thermal fusion bonding, and a resin capable of thermal fusion bonding is used. For example, Linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), metallocene polyethylene, ethylene-acrylic acid copolymer (EAA), or ethylene-methacrylic acid copolymer (EMAA) is used. In addition, a resin film such as unstretched polypropylene (CPP), biaxially stretched polypropylene (OPP), polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), or ionomer may also be used.

The gas barrier layer 10b serving as an intermediate layer of the film 10 is made of a gas impermeable metal foil such as an aluminum foil (Al foil), a copper foil (Cu foil), or a stainless steel foil. In some cases, the film may be formed by depositing a metal such as Al or Cu on a resin film such as an ethylene-vinyl alcohol copolymer resin film (EVOH film) or a polyethylene terephthalate film (PET film) having low gas permeability (metal deposition film), or by depositing a metal oxide such as silica or alumina or diamond-like carbon (DLC).

Further, the protective layer 10a which becomes the outermost layer of the film 10 is a layer for protecting the gas barrier layer 10b, and a nylon film, a polyethylene terephthalate film (PET film), a polyethylene film (PE film), a polypropylene film (PP film), or the like can be used. Among these, films having low water absorption are preferable, and for example, PET films, PE films, PP films, and the like, and any resin can be used as long as it has a water absorption equal to or lower than that of PET, and the resin is not particularly limited to the above examples.

Although not shown, if a nylon film is used between the gas barrier layer 10b and the bonding layer 10c as the film 10 constituting the covering bag 5, the strength of the entire film 10 can be improved, which is effective. That is, when copper ion-exchanged ZSM-5 type zeolite is used as the gas adsorbing material 6, if there are particles having a large particle size among the zeolite particles, a large tensile force is applied to the portion of the film 10 facing the particles, and cracks or pinholes may occur on the aluminum foil constituting the gas barrier layer 10b starting from the large particles. However, the use of a nylon membrane as the membrane 10 is effective in suppressing the occurrence of cracks and pinholes originating from large particles.

The porous member 7 sealed together with the gas adsorbing material 6 in the covering bag 5 has a structure in which the resin powder is sintered to have three-dimensional network pores, and has a porous structure in which gas passes through the gas adsorbing material 6 without passing through the powder particles.

The inner surface of the covering bag 5 is bonded to the porous member 7 due to atmospheric pressure by vacuum suction during the manufacturing process of the gas adsorbing device. In the present embodiment, the resin constituting the porous member 7 is a thermoplastic resin compatible with the bonding layer 10c constituting the innermost layer of the covering bag 5, for example, a resin such as the above-mentioned Linear Low Density Polyethylene (LLDPE), and the intersecting surface portion 7a thereof and the bonding layer 10c constituting the innermost layer of the covering bag 5 are physically integrated by thermal fusion.

On the other hand, as the gas adsorbing material 6, a chemisorption material such as calcium oxide or magnesium oxide, a physisorption material such as zeolite, a mixture thereof, or a gas adsorbing alloy such as BaLi4 can be applied. In the present embodiment, a copper ion-exchanged ZSM-5-type zeolite having particularly high gas adsorption capacity and adsorption capacity is used. As other adsorbents having high gas adsorption capacity, there are ZSM-5 type zeolite containing barium (Ba) or strontium (Sr), an adsorbent containing M-O-M species (M: Ba or Sr, O: oxygen) in ZSM-5 type zeolite, and the like, and these may be used or used in combination.

The opening member 9 is made of synthetic resin or metal having appropriate strength and elasticity. In the case of a resin, polypropylene, polybutylene terephthalate, polystyrene, polyamide, polycarbonate, polyoxymethylene, AS resin, ABS resin, and the like are candidates AS long AS gas generation is small and the hardness of the protrusions 8 can be ensured.

As shown in fig. 3 and 6, the unsealing member 9 has a projection 8 fitted to face the intersecting surface portion 7a of the porous member 7. When the gas adsorbing device 4 is pressure-reduced and sealed in the envelope 2 of the vacuum heat insulating material 1, the gas adsorbing device 4 is pressed into the porous member 7 side of the gas adsorbing device 4 by the atmospheric pressure. The covering bag 5 is perforated, and the gas adsorbing material 6 inside communicates with the inside of the outer covering 2 of the vacuum heat insulating material 1.

Next, the operation and action of the gas adsorbing device 4 and the vacuum heat insulating material 1 using the same configured as above will be described.

The gas adsorbing member 4 is a gas-barrier covering bag 5, and a gas adsorbing member 6 is sealed under reduced pressure. The envelope 5 is flexible, and the gas adsorbing material 6 and the porous member 7 are arranged in a planar state adjacent to each other inside the envelope 5. This can be produced by performing heat fusion after reducing the pressure with a general vacuum extractor. The portion thereof to be thermally welded is a portion shown in dark gray in fig. 3.

Here, when the interior of the cover bag 5 into which the gas adsorbing material 6 is inserted is depressurized and sealed, the interior of the cover bag 5 is depressurized by suction from the porous member 7 side toward the gas adsorbing material 6 side, whereby the gas adsorbing material 6 in the cover bag 5 can be prevented from being exhausted from the cover bag 5 due to the presence of the porous member 7. That is, the gas adsorbing member 6 in the covering bag 5 can be prevented from being evacuated from the covering bag 5 by sucking and evacuating gas from the side of the heat-fusion sealed portion shown in dark gray in fig. 3.

Therefore, the gas adsorbing device 4 of the present embodiment can be manufactured without using a special apparatus as described in the background section, and can be vacuum-sealed without slowing down the evacuation rate, thereby improving productivity and being provided at low cost.

The gas adsorbing material 6 and the porous member 7 are disposed adjacent to each other in a planar state in the flexible covering bag 5. Since the covering bag 5 is formed of a flexible film, the thickness can be reduced and deformation such as bending can be facilitated as compared with the case where the gas adsorbing material 6 and the porous member 7 are stacked. Therefore, the present invention can be applied to a vacuum heat insulator which is thin, e.g., several millimeters, or a vacuum heat insulator which is used by being curved in an arc shape.

The gas adsorbing material 6 and the porous member 7 are disposed at different positions in the longitudinal direction of the gas adsorbing device 4.

Thus, for example, when the powdery gas adsorbing material 6 is used, the flexibility of the gas adsorbing device 4 can be obtained regardless of the presence or absence of the flexibility of the porous member 7.

When the porous member 7 is not more than 1/2 of the entire length of the gas adsorbing device 4 in the longitudinal direction, the gas adsorbing speed can be made low, and the gas adsorbing ability can be maintained for a longer period of time, which is preferable. In addition, when the porous member 7 is made to be 1/4 or less of the entire length of the gas adsorbing device 4 in the longitudinal direction, even when the porous member 7 has poor flexibility, the entire gas adsorbing device 4 can have flexibility, and therefore, it is preferable.

Further, by increasing the planar width of the covering bag 5, the gas adsorbing material 6 can be increased in amount while keeping the thickness thin, and the gas adsorbing capability can be maintained for a long time. Here, the planar width is, for example, a dimension of at least one side or a dimension of an opposite side in the case where the wrapping bag 5 is a quadrangle or a polygon in plan view, a dimension of a long side in the case of an ellipse, or a dimension such as a diameter in the case of a circle.

In the gas adsorbing device 4 of the present embodiment, the intersecting surface portion 7a of the porous member 7 intersecting the surface adjacent to the gas adsorbing member 6 is joined to the inner surface of the envelope 5. Thus, when the inside of the vacuum heat insulator 1 is communicated with the inside of the gas adsorbing device 4, the wrapping bag 5 is perforated at the intersecting surface portion 7a of the porous member 7, and thus the gas from the outside of the wrapping bag 5 is adsorbed by the gas adsorbing device 6 through the inside of the porous member 7. Thus, the gas adsorption rate of the gas adsorbing material 6 can be arbitrarily set and controlled by the pore diameter and porosity of the porous member 7.

Therefore, the range of variation in gas adsorption performance can be reduced, the adsorption performance can be stabilized, the gas adsorption rate can be reduced, and the gas adsorption performance can be maintained for a longer period of time.

That is, in the structure in which the glass sealing material is crushed to form the communication as in the conventional gas adsorbing device, the communication area due to the crack formed by crushing cannot be determined, and the gas adsorbing speed is high and low, and the variation width is likely to be large. Although the deviation width is within the design dimension range, there is a great difficulty in stabilizing the gas adsorption performance in order to further reduce the deviation width. Further, when the gas adsorption rate is lowered to maintain the gas adsorption capacity for a longer period of time by limiting the communication area due to the slit to a certain value or less, there is a difficulty.

However, according to the gas adsorbing device 4 of the present embodiment, since the gas adsorbing material 6 adsorbs the gas via the porous member 7, the gas adsorbing rate can be set to a substantially constant value with a small variation width by controlling the pore diameter and porosity of the porous member 7. Therefore, further stabilization of the gas adsorption performance and a long period of time for maintaining the gas adsorption performance can be achieved at the same time.

In the gas adsorbing device 4 of the present embodiment, since the inner surface of the covering bag 5 is joined to the intersecting surface portion 7a of the porous member 7, the gas entering through the holes opened at the intersecting surface portion 7a by the perforation passes through the porous member 7 and is adsorbed by the gas adsorbing material 6. Therefore, as described above, stabilization of the gas adsorption performance and control of the adsorption rate by the porous member 7 can be achieved with high accuracy.

In the present embodiment, the film member and the porous member 7 which are the joining layer 10c covering the innermost layer of the bag 5 are made of a heat-weldable resin material and are heat-welded. Therefore, the intersecting surface portion 7a of the porous member 7 is melted as shown by the broken line in fig. 4 and physically integrated with the inner surface of the covering bag 5. Therefore, a minute gap remaining between the inner surface of the cover bag 5 and the intersecting surface portion 7a of the porous member 7 can be prevented, and gas can be prevented from being adsorbed by the gas adsorbing material 6 from this portion. That is, in the present embodiment, the gas entering from the holes opened at the intersecting surface portion 7a must pass through the porous member 7 and be adsorbed by the gas adsorbing material 6 due to the perforation. This makes it possible to realize the stabilization of the gas adsorption performance and the control of the adsorption rate by the porous member 7 with high accuracy.

Further, the joining of the inner surface of the covering bag 5 and the intersecting surface portion 7a of the porous member 7 described above can be performed simultaneously with the thermal welding performed when the covering bag 5 is sealed. Further, since a thermoplastic resin material is used, the entire surfaces of the resins are reliably bonded by phase fusion between the resins, and the productivity can be improved, and the performance stability and the accuracy of the control of the suction speed can be improved.

Further, since the porous member 7 is formed by sintering the resin powder, the porous member 7 is not cracked by an external force at the time of perforation, and gas can be prevented from leaking to the gas adsorbing member 6 and being adsorbed via the cracking. Therefore, the gas adsorbing material 6 inevitably adsorbs gas through the pores of the porous member 7, and stabilization of the gas adsorbing performance can be promoted.

In addition, the porous member 7 has three-dimensional network pores, and has a porous structure of powder particles that allow gas to pass but do not pass through the gas adsorbing member 6. Accordingly, when the interior of the envelope 5 is depressurized and sealed, the gas adsorbing material 6 in the envelope 5 can be reliably prevented from being exhausted from the envelope 5 through the porous member 7, and the gas adsorbing material 6 can be more reliably prevented from being exhausted from the envelope 5 when depressurized and sealed.

On the other hand, the gas adsorbing device 4 is kept in a pressure-reduced and sealed state by the envelope 5 without causing perforation by the opening member 9 during storage. Therefore, the gas adsorbing member 6 does not come into contact with the outside air, and the adsorbing ability of the gas adsorbing member 6 is maintained.

The film 10 constituting the covering bag 5 includes a gas barrier layer 10b including a metal foil impermeable to gas. This can strongly suppress the gas adsorbing material 6 from deteriorating with time due to the permeation of the outside air into the covering bag 5. Therefore, the adsorption capacity of the gas adsorbing material 6 can be maintained high, and a good gas adsorption capacity can be exhibited for a long time.

Further, since the gas barrier property of the covering bag 5 is high, even if an adsorbent having a high gas adsorption capacity such as copper ion-exchanged ZSM-5 type zeolite is used as the gas adsorbing material 6, the adsorption capacity can be reliably maintained, and a further excellent gas adsorption capacity can be exhibited over a long period of time in cooperation with the use of a gas adsorbing material having a high adsorption capacity.

Further, the film 10 forming the covering bag 5 has a structure including a protective layer 10a covering the surface of the gas barrier layer 10 b. Therefore, the metal foil serving as the gas barrier layer 10b is protected by the protective layer 10a, and when unnecessary external force is applied to the film 10 covering the pouch 5, the metal foil can be prevented from being accidentally broken, and the gas adsorbing material 6 can be reliably prevented from being deteriorated during storage.

The protective layer 10a of the covering bag 5 is made of PET (polyethylene terephthalate) or a resin having a water absorption rate equal to or lower than that of PET. Therefore, when the gas adsorbing device is stored, since the protective layer 10a absorbs moisture in the atmosphere, moisture is prevented from being released into the outer cover 2 of the vacuum heat insulating material 1 to reduce the degree of vacuum in the outer cover 2 or to prevent the gas adsorbing ability of the gas adsorbing material 6 from being consumed by moisture absorption when the gas adsorbing device is applied to the vacuum heat insulating material 1. Therefore, the gas adsorption performance can be maintained for a longer period of time, and the thermal insulation performance of the vacuum thermal insulation material 1 to which the gas adsorption device is applied can be kept good.

It is more preferable that the protective layer 10a is PET or a resin having a water absorption rate as low as or lower than that of PET, but the protective layer is not particularly limited to these examples.

The gas adsorbing device 4 described above is inserted into the bag-shaped casing 2 together with the core material 3, and after evacuation to vacuum, the bag opening of the casing 2 is heat-sealed by heat-sealing, thereby being used as an adsorbing device for the vacuum heat insulating material 1.

Fig. 7 is a schematic view for explaining the method of manufacturing the vacuum heat insulator 1.

The vacuum heat insulator 1 is placed in a decompression chamber 12 of a vacuum packing machine 11, and the inside of the decompression chamber 12 is vacuum-exhausted by a vacuum pump 13. Thus, the gas in the casing 2 is evacuated and depressurized, and the opening of the casing 2 is heat-sealed by the heat sealer 14 to produce the vacuum heat insulator 1.

At this time, in the gas adsorbing device 4, the unsealing member 9 is pushed in by atmospheric pressure, or the unsealing member 9 is mechanically pushed in after vacuum sealing, the protrusion 8 is pricked on the film 10, and the film 10 is perforated.

Thus, the inside of the gas adsorbing device 4 communicates with the inside of the envelope 2 of the vacuum heat insulating material 1, and the gas adsorbing material 6 can adsorb gas remaining in the envelope 2 and the like.

The film perforation is performed during vacuum evacuation of the interior of the envelope 2 of the vacuum heat insulator 1 or after vacuum sealing. This prevents the gas-adsorbing material 6 from being exposed to the air in the atmosphere during film perforation and adsorbing the air to deteriorate, as in the case where the film is perforated in the atmosphere and then placed in the casing to be vacuum-exhausted. Therefore, the gas adsorption performance of the gas adsorbing member 6 can be maintained and ensured to be good performance for a longer period of time.

The unsealing member 9 for piercing the film 10 is made of a resin that generates little metal or gas. This prevents the outer cover 2 of the vacuum heat insulator 1 from releasing gas, thereby reducing the degree of vacuum in the outer cover 2, or, similarly to the case of the film 10, the gas adsorbing capability of the gas adsorbing material 6 from being consumed for adsorbing the gas. Therefore, it is effective to maintain good gas adsorption performance for a longer period of time and to maintain good heat insulation performance of the vacuum heat-insulating material 1.

In the vacuum heat insulator 1 thus formed, since the gas adsorbing device 4 is thin and flexible, even a vacuum heat insulator having a thickness of several millimeters or a vacuum heat insulator which is bent or the like can be used by enclosing the gas adsorbing device 4 together with the core material 3, and thus a vacuum heat insulator having a gas adsorbing effect and excellent heat insulating performance over a long period of time can be realized.

In the gas adsorbing device 4, the porous member 7 is partially perforated, and the inside of the casing 2 communicates with the inside of the gas adsorbing device 4. Therefore, as described above, the gas in the vacuum heat insulator 1 passes through the porous member 7 and is adsorbed by the gas adsorbing material 6, and the gas adsorption rate of the gas adsorbing material 6 can be arbitrarily set and controlled by at least one of the pore diameter and the porosity of the porous member 7. Therefore, the gas adsorption performance can be stabilized, and a vacuum heat-insulating material that exhibits good heat-insulating performance for a longer period of time can be realized.

The gas adsorbing device 4 is configured to include an unsealing member 9 having a protrusion 8 at a portion opposite to the intersecting surface portion 7a of the porous member 7 of the envelope bag 5. Therefore, when the gas adsorbing device 4 is vacuum-sealed in the casing 2 of the vacuum heat insulating material 1, the protrusion 8 of the unsealing member 9 perforates the covering bag 5, and the gas adsorbing material 6 inside can be communicated with the vacuum region in the casing 2. Therefore, the deterioration of the gas adsorbing member 6 adsorbing the outside air in the atmosphere at the time of perforation of the covering bag can be prevented, and the heat insulating property of the vacuum heat insulating member 1 can be maintained well for a longer period of time.

(embodiment 2)

Next, embodiment 2 of the present invention will be explained.

The gas adsorbing device 4 in the present embodiment is configured such that a moisture adsorbing material 15 is provided between the gas adsorbing material 6 and the porous member 7.

With this configuration, the gas from the porous member 7 passes through the moisture adsorbing material 15 and is adsorbed by the gas adsorbing material 6, and moisture contained in the gas can be adsorbed and removed. Therefore, the gas adsorbing material 6 can be prevented from being wasted due to moisture adsorption, and good gas adsorption performance can be ensured over a longer period of time, thereby improving reliability.

Further, since waste of the adsorption capacity of the gas adsorbing material 6 due to moisture adsorption can be suppressed, the consumption of the copper ion-exchanged ZSM-5-type zeolite used as the gas adsorbing material 6 due to moisture adsorption can be eliminated, and the appropriate amount of the copper ion-exchanged ZSM-5-type zeolite can be reduced, thereby making it possible to downsize the gas adsorbing device 4.

Further, the joining layer 10c of the film 10 constituting the covering bag 5 can be melted at a temperature much lower than the melting temperature of glass or the like, and therefore the heat-sealing temperature can be greatly reduced. Therefore, even if the moisture adsorbing member 15 is provided in the covering bag 5, the performance of the gas adsorbing member 6 can be prevented from being deteriorated by the gas generated from the moisture adsorbing member 15, and a high-performance gas adsorbing device 4 in which the moisture adsorbing member 15 is provided together can be realized.

For example, the material to be the adhesive layer, for example, PE itself melts at about 100 to 140 ℃, PP melts at about 130 ℃, and EMAA or an ethylene ionomer melts at about 100 ℃. When these are laminated films, they can be fused at about 160 to 190 ℃ although they have different lamination structures and thicknesses. Even if the moisture adsorbing material 15 is provided in the covering bag 5, the performance of the gas adsorbing material 6 can be prevented from being deteriorated by the desorbed gas from the moisture adsorbing material 15, and a high-performance gas adsorbing device 4 in which the moisture adsorbing material 15 is provided together can be realized.

Various materials such as calcium oxide (CaO), silica gel, zeolite, or molecular sieve can be used as the moisture adsorbing material 15.

Other configurations and operational effects are the same as those of embodiment 1, and the same components are denoted by the same reference numerals and are not described.

(embodiment 3)

Next, embodiment 3 will be explained.

Fig. 9 is a side view schematically showing the structure of the gas adsorbing device according to embodiment 3 of the present invention.

The gas adsorbing device 4 in the present embodiment is configured by sealing a combination of a plurality of sets of gas adsorbing materials 6 and porous members 7 in one covering bag 5 under reduced pressure.

According to this configuration, the pore diameter and porosity of each porous member 7 are changed in advance, whereby the gas adsorption rate can be changed, and the quick-acting property and the maintenance property of gas adsorption can be both achieved, which is effective.

For example, if the pore diameter and porosity of each of the plurality of porous members 7 are set to be a little large and the other is small, the porous member 7 having a large pore diameter and porosity adsorbs gas in the vacuum heat insulator in a short time because the gas adsorption rate is high, and the porous member exhibits quick-acting performance in adsorbing and removing the gas remaining after the evacuation of the gas under reduced pressure during the production of the vacuum heat insulator. In other porous members 7 having a small pore size and porosity, the gas adsorption rate is slow. Here, in the outer cover, by making the adsorption speed of the gas adsorbing member 6 slower than that of the moisture adsorbing agent provided separately from the gas adsorbing member, most of the moisture contained in the gas penetrating through the outer cover for a long time can be adsorbed and removed by the moisture adsorbing agent. Therefore, waste of the gas adsorbing member 6 due to moisture adsorption can be prevented, and the gas in the vacuum heat insulating member can be continuously adsorbed for a long period of time. Therefore, the present invention is suitable for use in large vacuum heat-insulating materials used for building materials, LNG ships, and the like.

Other operational effects are the same as those described in embodiment 1 and embodiment 2, and therefore, the description thereof is omitted.

The gas adsorbing device and the vacuum heat insulating material using the same according to the present invention have been described above, but the present invention is not limited to these.

For example, in the embodiment, the porous member 7 is exemplified by a member formed by sintering resin powder, but may be a member having a function of not passing the powder particles of the gas adsorbing member 6 but passing gas, such as a nonwoven fabric or glass wool. The pore shape may be not three-dimensional mesh pores, but may be a group of linear through pores having a particle diameter smaller than that of the powder particles of the gas adsorbing material 6. When a nonwoven fabric or glass wool is used, the vacuum heat insulator is more easily deformed by bending or the like because of its superior flexibility than the porous member.

The form of the cover bag 5 is not limited to the three-sided bag exemplified in the embodiment, and may be any form of bag such as a double bag, or a pleated bag.

Further, the joining of the inner surface of the covering bag 5 and the intersecting surface portion 7a of the porous member 7 may be performed not by thermal fusion but by using an adhesive.

That is, the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive, and the scope of the present invention is indicated by the claims rather than the above description, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

(embodiment 4)

Next, embodiment 4 of the present invention will be explained. Embodiments 4 to 6 of the present invention are directed to providing an unsealing member for a gas adsorbing device that is inexpensive and capable of piercing with small variations, a gas adsorbing device capable of obtaining stable gas adsorbing performance, and a vacuum heat insulator and an apparatus using the same.

Fig. 10 is a cross-sectional view showing the structure of the unsealing member for a gas adsorbing device and the vacuum heat-insulating member with a gas adsorbing device using the unsealing member for a gas adsorbing device according to embodiment 4 of the present invention, and fig. 11 is a schematic view showing the structure seen from the side in a state where the unsealing member for a gas adsorbing device and the gas adsorbing device are mounted. Fig. 12 is an enlarged cross-sectional view schematically showing the film structure of the container for housing the gas adsorbing device in embodiment 4 of the present invention, and fig. 13 is an enlarged cross-sectional view schematically showing the state in which the unsealing member for the gas adsorbing device and the gas adsorbing device are mounted.

Fig. 14 is a plan view showing a state in which the gas adsorbing device unsealing member and the gas adsorbing device in embodiment 4 of the present invention are mounted, and fig. 15 is a perspective view showing a state in which the gas adsorbing device unsealing member and the gas adsorbing device are mounted. Fig. 16 is a perspective view showing an external appearance of the unsealing member for a gas-adsorbing device in embodiment 4 of the present invention, and fig. 17 is a schematic view for explaining a method of manufacturing a vacuum heat-insulating material in which the gas-adsorbing device is hermetically sealed in an enclosure.

First, as shown in fig. 10, the vacuum insulation material 101 of the present embodiment is configured by providing the gas adsorbing device 104 inside the sheath 102 together with the core material 103, and then performing pressure reduction sealing to communicate the inside of the gas adsorbing device 104 with the inside of the sheath 102.

Although not shown, a moisture adsorbent may be provided inside the outer cover 102 together with the core material 103 and the gas adsorbing device 104. The moisture adsorbent adsorbs moisture (water vapor) remaining or entering the vacuum heat-insulating material. The moisture adsorbent is not particularly limited, and it is possible to use a chemically adsorptive substance such as calcium oxide or magnesium oxide, a physically adsorptive substance such as zeolite, or a mixture thereof.

As shown in fig. 11, the gas adsorbing device 104 is formed in a flat shape by inserting a gas adsorbing material 106 into an adsorbing material housing container 105 formed of a flexible laminate film having gas barrier properties and performing pressure reduction sealing.

Further, as shown in fig. 11, the gas adsorbing device 4 also includes an unsealing member 108 on the surface of the portion of the adsorbing material housing container 105 where the gas adsorbing material 106 is provided.

As shown in fig. 16, the unsealing member 108 is made of a spring wire material including stainless steel or the like. The spring wire material is formed into a coil shape, and the gripping portion 109 for gripping the gas adsorbing device 104 is formed by making the coil winding density of one end side thereof denser than that of the other end side. Further, the other end side of the coil density distribution is bent toward the grip portion 109 to form a perforated portion 110 that opens into the gas adsorbing device 104.

The grip 109 is configured by bringing the coil winding wires into close contact with each other at least once. The perforation 110 is formed by bending and cutting a distal end portion bent from the coil-shaped portion toward the coil center portion toward the grip portion 109.

The spring wire of the opening member 108 is formed of a wire having a wire diameter of, for example, about 0.5 to 1.0mm, which is perforated without difficulty by the perforation portion 110, and has a circular or elliptical cross section and an arc-shaped outer peripheral surface. When the wire diameter is small, the hole diameter obtained by the perforation is small, and the gas adsorption rate is slow, but by making the adsorption rate of the gas adsorbing member 106 in the outer cover slower than the adsorption rate of the moisture adsorbing agent provided separately from the gas adsorbing member, most of the moisture contained in the gas penetrating through the outer cover 102 for a long time can be adsorbed and removed by the moisture adsorbing agent. Therefore, waste of the gas adsorbing material 106 due to adsorption of moisture can be prevented, and the gas in the vacuum heat insulating material can be continuously adsorbed for a long period of time. Therefore, the present invention is suitable for use in large vacuum heat-insulating materials used for building materials, LNG ships, and the like.

The spring wire of the opening member 108 may be made of a metal material such as stainless steel, but may be made of any material as long as it generates little gas in a vacuum atmosphere, or may be made of a resin material that can impart spring properties, for example.

On the other hand, the adsorbing material container 105 of the gas adsorbing device 104 is configured by sealing and welding a film having a high gas barrier property into a bag shape, for example, as shown in fig. 12, by a laminated film 112 having at least three layers, which is composed of at least an outermost protective layer 112a, an intermediate gas barrier layer 112b, and an innermost bonding layer 112 c.

In the present embodiment, as shown in fig. 14, the adsorbing material container 105 is configured by sealing and welding the peripheries of two laminated films 112 (light gray portions) into a bag shape, and the opening (dark gray portion) thereof is formed as a thin portion 105a having only a laminated film layer together with the periphery of the laminated film 112. For example, one laminated film 112 may be formed into any form such as a bag shape.

In the laminated films 112, the bonding layer 112c formed of the innermost film member is a layer that firmly bonds the outer peripheral portions of the laminated films 112 by seal welding. As the junction layer 112c, a resin capable of thermal welding, such as Linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), metallocene polyethylene, ethylene-acrylic acid copolymer (EAA), or ethylene-methacrylic acid copolymer (EMAA), can be used. As the bonding layer 112c, a resin film such as unstretched polypropylene (CPP), biaxially stretched polypropylene (OPP), polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), or ionomer may be used.

As the gas barrier layer 112b which is an intermediate layer of the laminated film 112, a metal foil such as an aluminum foil (Al foil), a copper foil (Cu foil), or a stainless steel foil which is not gas permeable is used. In some cases, the gas barrier layer 112b may be formed of a film (metal vapor deposition film) obtained by depositing a metal or metal oxide such as Al or Cu on an ethylene-vinyl alcohol copolymer resin film (EVOH film) or a resin film such as a polyethylene terephthalate film (PET film) having low gas permeability, or a film obtained by depositing a metal oxide such as silica or alumina or diamond-like carbon (DLC).

The protective layer 112a, which is the outermost layer of the laminate film 112, is a layer that protects the gas barrier layer 112 b. As the protective layer 112a, a nylon film, a polyethylene terephthalate film (PET film), a polyethylene film (PE film), a polypropylene film (PP film), or the like can be used. Among these, a film having a low water absorption rate is preferable, and for example, a PET film, a PE film, a PP film, or the like, and any resin can be used as long as it has a water absorption rate equivalent to or lower than that of PET, and the film is not particularly limited to the above examples.

On the other hand, a chemisorptive substance such as calcium oxide or magnesium oxide, a physisorptive substance such as zeolite, a mixture thereof, or a gas adsorption alloy such as BaLi4 can be applied to the gas adsorbing material 106. In the present embodiment, a copper ion-exchanged ZSM-5-type zeolite having particularly high gas adsorption capacity and adsorption capacity is used. As other adsorbents having high gas adsorption capacity, there are ZSM-5 type zeolite containing barium (Ba) or strontium (Sr), adsorbents containing M-O-M species (M: Ba or Sr, O: oxygen) in ZSM-5 type zeolite, and the like, and these may be used or used in combination.

The gas adsorbing device 104 is kept in a pressure-reduced and sealed state by the adsorbing material container 105 without causing perforation by the unsealing member 108 during storage. This prevents the gas adsorbing member 106 from coming into contact with the outside air, and the adsorbing ability of the gas adsorbing member 106 is maintained.

The operation and action of the unsealing member for a gas adsorbing device configured as described above, and the gas adsorbing device 104 and the vacuum heat insulating material 101 using the unsealing member will be described below.

First, the unsealing member 108 is formed by using a spring wire, so that the material thereof can be significantly reduced as compared with an unsealing member composed of a leaf spring. The grip 109 and the perforated portion 110 of the unsealing member 108 can be formed by simply bending the spring wire, and a plurality of steps such as press cutting, press bending several times, and processing of cutting and raising are not required, as in the leaf spring type unsealing member. Therefore, the material and man-hours can be reduced, so that the cost can be greatly reduced, and the gas adsorbing device 104 can be provided at low cost.

The unsealing member 108 is used in a state of being attached to the gas adsorption container by sandwiching the gas adsorption container by the grip portion 109. Since the peripheral edge portion of the bag serving as the suction material container 105 is formed as the thin portion 105a, the opening member 108 can be attached by inserting the grip portion 109 from the thin portion 105a, and can be easily attached to the suction material container 105.

The holding portion 109 of the opening member 108 is formed by forming a spring wire material into a coil shape and making the coil winding density on one end side thereof closer than the coil winding density on the other end side thereof. Therefore, the gas adsorbing device 104 can be elastically sandwiched between the spring wires, and the assembly is reliable.

In particular, the gripping portion 109 is configured to bring the coil winding wire into close contact with each other by at least one turn, and is strong in elastic compression by spring force, and can strongly grip the gas adsorption device 104.

Therefore, the opening member 108 is less likely to be displaced and detached from the adsorber housing container 105, and is fixed to a predetermined position by fitting, whereby the highly reliable gas adsorbing device 104 can be realized without a perforation error due to a displacement or the like.

In the unsealing member 108, the end portion of the coiled spring wire opposite to the grip portion 109 is pushed in by an external force, and the piercing portion 110 pierces into the adsorber housing container 105 to pierce and pierce. At this time, the perforated portion 110 is formed by directly using the tip end portion of the spring wire. Therefore, since the wire diameter of the perforated portion 110 is the same over the entire length, even if the perforation depth varies depending on the application method of the external force, the hole opened in the suction material storage container 105 of the gas suction device 104 is of a constant size.

Therefore, the gas adsorbing device 104 can stably adsorb the gas around the adsorbing material housing container 105 without variation in adsorption rate, and has stable gas adsorption performance and high reliability.

The perforation 110 is formed by bending the tip end portion bent from the coil-shaped portion toward the coil center toward the grip portion 109, and is perforated in the gas adsorbing device 104. The perforation unit 110 perforates the coil center of the coil-like portion, that is, in the vicinity of the coil center of the grip 109 gripping the gas adsorbing device 104. Therefore, a perforation error, in which perforation is performed in the vicinity of the edge of the outer periphery of the gas adsorbing device 104 where the gas adsorbing material 106 is not present, can be prevented, and reliable perforation can be achieved.

Next, the operation and effect of the gas adsorbing device 104 using the unsealing member 108 and the vacuum heat-insulating material 101 using the same will be described.

First, the vacuum heat insulator 101 is manufactured by inserting the gas adsorbing device 104 equipped with the unsealing member 108 into the outer cover 102, evacuating the inside to vacuum, and then thermally sealing the bag opening of the outer cover 102.

Fig. 17 is a schematic view for explaining the method of manufacturing the vacuum heat insulator 101. The vacuum heat insulating material 101 is placed in a decompression chamber 115 of a vacuum packing machine 114, and the inside of the decompression chamber 115 is evacuated by a vacuum pump 116. Thereby, the gas in the enclosure 102 is evacuated and decompressed, and the opening of the enclosure 102 is heat-sealed by the heat sealer 117 to be sealed.

At this time, the unsealing member 108 of the gas adsorbing device 104 is pushed in through the jacket 102 of the vacuum heat insulating material 101 by an atmospheric external force applied when the vacuum heat insulating material 101, which is pressure-reduced and sealed by the vacuum pump 116, is taken out to atmospheric pressure or a mechanical external force such as roll pressing performed after pressure-reduction and sealing, and the perforated portion 110 penetrates into the adsorbing material container 105 to perforate the adsorbing material container 105.

Thus, the inside of the gas adsorbing device 104 communicates with the inside of the sheath 102 of the vacuum heat insulating material 101, and the gas adsorbing device 106 adsorbs gas such as gas remaining in the sheath 102.

Here, since the holes formed in the gas adsorbing device 104 are substantially constant in size without variation, the gas remaining in the casing 102 and the like can be reliably adsorbed without variation in adsorption speed. Therefore, the vacuum heat insulator 101 can exhibit excellent and stable vacuum heat insulating performance.

Further, the unsealing member 108 for piercing the gas adsorbing device 104 is elastically pressed and fixed against the adsorbing material container 105 without being displaced from the position of the adsorbing material container 105, and the adsorbing material portion of the adsorbing material container 105 can be reliably pierced. Therefore, the gas adsorption failure due to the perforation error is also suppressed. Therefore, from this viewpoint, the vacuum heat insulator 101 can reliably adsorb gas remaining in the sheath 102 and the like, and maintain the degree of vacuum. This makes it possible to achieve a high vacuum heat insulating effect and high reliability without causing heat insulating failure in the vacuum heat insulating material 101.

Further, the gas adsorbing device 104 can be reliably perforated by forming the perforated portion 110 of the unsealing member 108 at the center portion of the coil-shaped outer peripheral portion. In addition, this effect can reliably suppress the gas adsorption failure due to the piercing error, and can further improve the reliability of the vacuum heat insulation effect.

The perforation is performed on the gas adsorbing device 104 sealed in the envelope 102 of the vacuum heat insulating material 101. Therefore, when the adsorbing material housing container 105 is perforated, the gas adsorbing material 106 is exposed to the air in the atmosphere and adsorbed and deteriorated, and the gas adsorbing performance of the gas adsorbing material 106 can be maintained and maintained at a good performance for a longer period of time, as in the case where the casing 102 is placed after the perforation in the atmosphere and then vacuum evacuation is performed.

The spring wire constituting the opening member 108 is formed in a circular or elliptical shape in cross section and has an arc-shaped outer peripheral surface. Therefore, even if the envelope 102 of the vacuum heat-insulating material 101 is pressed against the spring wire of the unsealing member 108 by the atmospheric pressure, the outer peripheral surface of the spring wire is in the shape of an arc, so that the envelope 102 is prevented from being broken, the degree of vacuum of the vacuum heat-insulating material 101 is reliably maintained, and reliability can be ensured. That is, if the opening member 108 is formed of a plate material, stress concentration at the atmospheric pressure is likely to occur at the corner of the plate material in the outer cover 102, and the bag may be broken. However, in the present embodiment, the opening member 108 is a linear member, and the outer peripheral surface thereof has an arc shape. This prevents the outer cover 102 from being broken without causing stress concentration. As a result, the vacuum heat-insulating material 101 can reliably maintain the degree of vacuum for a long period of time, and reliability as the vacuum heat-insulating material 101 can be ensured.

Further, the unsealing member 108 that perforates the gas adsorbing device 104 is formed of a metal such as stainless steel. Therefore, it is possible to prevent the release of gas in the sheath 102 of the vacuum heat insulator 101, and the reduction of the degree of vacuum in the sheath 102, and to prevent the gas adsorbing ability of the gas adsorbing member 106 from being consumed by adsorbing the gas. Therefore, the excellent gas adsorption performance can be maintained for a long period of time, and the heat insulating performance of the vacuum heat insulating material 101 can be maintained well.

Further, the protective layer 112a of the laminated film 112 forming the adsorbing material container 105 is made of PET (polyethylene terephthalate) or a resin having a water absorption rate equal to or lower than that of PET. This prevents the protective layer 112a from absorbing moisture in the atmosphere when the gas adsorbing device 104 is stored, and when the device is applied to the vacuum heat insulating material 101, the moisture is released into the sheath 102 of the vacuum heat insulating material 101, and the degree of vacuum in the sheath 102 is reduced or the gas adsorbing ability of the gas adsorbing material 106 is consumed for the adsorption of the moisture. Therefore, the gas adsorption performance can be maintained for a longer period of time, and the thermal insulation performance of the vacuum thermal insulation member 101 to which the gas adsorption performance is applied can be maintained well.

It is more preferable to use PET or a resin having a water absorption rate of about the same as or lower than that of PET for the protective layer 112a, but the protective layer is not particularly limited to these examples.

On the other hand, the vacuum heat insulator 101 thus formed is thin and flexible, and therefore can be used as a vacuum heat insulator 101 having a thickness of several millimeters or a vacuum heat insulator that is bent or the like. That is, the vacuum heat insulator can be used without being restricted by the form and shape of the device to which it is applied.

The vacuum heat-insulating material 101 thus formed can also be used as various refrigeration equipment such as refrigerators and vending machines, heat-and cold-insulation equipment such as thermostatic baths and thermos bottles, building materials, storage tanks for storing ultra-low-temperature substances such as LNG, heat-insulating walls of ships and the like, heat-insulating panels, heat-insulating equipment, and the like.

(embodiment 5)

Next, embodiment 5 of the present invention will be explained.

Fig. 18 is a plan view showing a state where the gas adsorbing device unsealing member and the gas adsorbing device in embodiment 5 of the present invention are mounted, and fig. 19 is a schematic view showing an enlarged cross-sectional configuration showing a state where the gas adsorbing device unsealing member and the gas adsorbing device are mounted.

In the gas adsorbing device 104 of the present embodiment, the porous member 118 is inserted into the adsorbing material housing container 105 together with the gas adsorbing material 106, and is sealed under reduced pressure. The gas adsorbing material 106 and the porous member 118 are configured to be adjacent to each other in a planar state.

Here, the porous member 118 is formed by sintering resin powder, has a three-dimensional network pore structure, and has a porous structure that does not pass powder of the gas adsorbing member 106 but passes gas.

Further, the porous member 118 is evacuated during the production of the gas adsorbing device 104, and thus comes into contact with the inner surface of the laminated film 112 serving as the adsorbing material housing container 105 due to the atmospheric pressure. In the present embodiment, the resin constituting the porous member 118 is made of a heat-fusible resin compatible with the junction layer 112c serving as the innermost layer of the laminate film 112, and is made of a resin such as linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), low-density polyethylene (LDPE), ultra-high-molecular-weight polyethylene (UHPE), or polypropylene (PP). Thus, the porous member 118 and the bonding layer 112c constituting the innermost layer of the laminate film 112 are physically integrated by thermal welding.

The unsealing member 108 has the same configuration as that described in embodiment 4, but the unsealing member 108 is attached so as to be perforated in the porous member 118 portion of the adsorber housing container 105.

The gas adsorbing device 104 having the above-described structure is manufactured by sealing and welding after being depressurized by a vacuum extractor as described above. In this case, that is, when the bag of the adsorber housing container 105 is depressurized and sealed, the gas adsorber 106 in the bag is depressurized by suction from the porous member 118 side toward the gas adsorber 106 side, whereby the presence of the porous member 118 prevents the gas adsorber 106 in the bag from being unnecessarily evacuated from the bag. Therefore, the gas adsorbing material can be manufactured by evacuation without using a special device having a function of preventing the gas adsorbing material from leaking, and since the pressure reduction and sealing can be performed without slowing down the evacuation speed, the productivity can be improved, and the gas adsorbing material 104 can be provided at low cost.

The gas adsorbing material 106 and the porous member 118 are disposed adjacent to each other in a flat state inside a flexible bag. This makes it possible to reduce the thickness and facilitate deformation such as bending, compared to the case where the gas adsorbing member 106 and the porous member 118 are disposed so as to overlap each other. Therefore, similarly to embodiment 4, the present invention can be applied to a thin vacuum heat insulator of several millimeters or so, a vacuum heat insulator used by being curved in an arc shape, and the like.

Further, by increasing the planar width of the bag, the amount of the gas adsorbing member 106 can be increased while keeping the thickness thin, the gas adsorbing capability can be maintained for a long time, the assembly of the opening seal member 108 can be facilitated, and the operability can be improved.

Further, since the porous member 118 of the adsorber housing container 105 is partially perforated, the gas adsorbing device 104 adsorbs ambient gas through the inside of the porous member 118. Thus, the gas adsorption rate of the gas adsorbing material 106 can be arbitrarily set and controlled by the pore diameter and porosity of the porous member 118. Further, in the outer cover 102, by making the adsorption speed of the gas adsorbing member 106 slower than that of the moisture adsorbing agent provided separately from the gas adsorbing device 104, most of the moisture contained in the gas penetrating through the outer cover for a long time can be adsorbed and removed by the moisture adsorbing agent. Therefore, waste of the gas adsorbing member 106 due to moisture adsorption can be prevented, and the gas in the vacuum heat insulating member can be continuously adsorbed for a long time. Therefore, the vacuum heat insulator 101 can be realized which can exhibit excellent heat insulating performance for a longer period of time while maintaining the gas adsorbing performance by reducing the gas adsorbing speed while stabilizing the gas adsorbing performance without causing any variation in the gas adsorbing performance while obtaining the above-described productivity improving effect and the like.

In the adsorbing material container 105 of the gas adsorbing material 106, the innermost film member and the porous member 118 are thermally welded, that is, the laminated film 112 and the porous member 118 constituting the adsorbing material container 105 are welded to each other by the fusion of the resins, so that the entire surfaces thereof are bonded without any gap. Thus, the gas adsorbed from the periphery of the gas adsorbing material 106 does not leak from the gap between the laminated film 112 and the porous member 118 constituting the adsorbing material housing container 105, and the performance stability can be improved. Further, when the bag of the suction material storage container 105 is sealed, the bag can be sealed by welding, and the inner surface of the bag can be joined to the surface of the porous member 118, thereby improving productivity.

Further, since the porous member 118 is formed by sintering the resin powder, the porous member 118 is not broken by an external force at the time of perforation, and gas can be prevented from leaking through the break and being adsorbed to the gas adsorbing member 106. Therefore, the gas adsorbing material 106 can adsorb the gas through the holes of the porous member 118 without fail, and stabilization of the gas adsorbing performance can be promoted.

Other configurations and effects of the gas adsorbing device 104 and configurations, manufacturing methods, and effects of the vacuum heat insulating material 101 are the same as those of embodiment 4, and descriptions thereof are omitted.

(embodiment 6)

Next, embodiment 6 will be explained.

The gas adsorbing device 104 according to embodiment 6 is configured such that a moisture adsorbing material 119 is disposed between the gas adsorbing material 106 and the porous member 118 shown in embodiment 5.

The moisture adsorbing material 119 may be made of various materials such as silica gel, zeolite, molecular sieve, and the like, in addition to calcium oxide (CaO).

With such a configuration, even if the gas adsorbed from the periphery of the gas adsorbing device 104 contains moisture, the gas adsorbing device 104 can reliably adsorb and remove the moisture by the moisture adsorbing member 119. Therefore, waste of the gas adsorbing material 106 due to moisture adsorption can be prevented, and good gas adsorbing performance can be ensured over a longer period of time, thereby improving reliability.

Further, since waste of adsorption capacity due to moisture adsorption can be suppressed, it is possible to reduce the amount of copper ion-exchanged ZSM-5-type zeolite used as the gas adsorbing material 106 without considering consumption due to moisture adsorption, and to reduce the size of the gas adsorbing device 104.

In addition, the bonding layer 112c of the laminated film 112 constituting the suction material container 105 can be melted at a much lower temperature than the melting temperature of glass or the like, and therefore the heat fusion temperature can be greatly reduced. Therefore, even if the moisture adsorbing member 119 is provided in the adsorbing member housing container 105, the performance of the gas adsorbing member 106 can be prevented from being deteriorated by the desorbed gas from the moisture adsorbing member 119, and a high-performance gas adsorbing device 104 in which the moisture adsorbing member 119 is provided can be realized.

For example, in the case where PE serving as the adhesive layer is melted at 100 to 140 ℃, PP is melted at about 130 ℃, EMAA or an ethylene ionomer is melted at about 100 ℃, and these are made into a laminate film, the laminate film can be fused at about 160 to 190 ℃ although the laminate structure and thickness thereof are different. Therefore, even if the moisture adsorbing member 119 is provided in the adsorbing member housing container 105, the performance of the gas adsorbing member 106 can be prevented from being deteriorated by the desorbed gas from the moisture adsorbing member 119, and a high-performance gas adsorbing device 104 in which the moisture adsorbing member 119 is provided can be realized.

In the case of using the moisture adsorbing material 119, although not shown, in the laminated film 112 constituting the adsorbing material container 105, it is effective to increase the strength of the entire laminated film 112 by using a nylon film between the gas barrier layer 112b and the bonding layer 112 c. That is, when calcium oxide is used as the moisture adsorbing material 119, for example, if particles having a large particle size are included among calcium oxide particles, a large tensile force is applied to a portion of the laminated film 112 facing the particles. In addition, cracking, pinholes, or the like may occur on the aluminum foil constituting the gas barrier layer 112b, starting from the large particles. However, as described above, if a nylon film is used in the laminated film 112 in advance, it is possible to suppress the occurrence of cracks and pinholes starting from large particles, and it is possible to effectively ensure the performance.

Other configurations and effects of the gas adsorbing device 104 and configurations and manufacturing methods of the vacuum heat insulating material 101 are the same as those of embodiment 5, and the description thereof is omitted.

The unsealing member 108 for a gas adsorbing device according to the present invention, and the gas adsorbing device 104 and the vacuum heat insulator 101 using the same have been described above with reference to embodiments 4 to 6, but the present invention is not limited to these.

For example, in the embodiment, the coil shape of the opening member 108 is exemplified as a shape in which the free length (total length) from the holding portion 109 to the portion where the perforation portion 110 is provided is formed by a cylindrical coil having the same diameter, but the present invention is not limited to this, and may be a shape of a conical coil having a small diameter on the perforation portion 110 side, an elliptical cylindrical coil, a polygonal cylindrical coil having a rectangular shape or the like, a coil spring having a coil portion, or the like.

Further, in the case where the coil shape of the opening member 108 is made into a conical shape, by providing the perforation portion 110 at the apex portion thereof, the perforation portion 110 can be positioned at the coil-shaped center portion, and reliable perforation with less perforation errors can be easily achieved. In addition, in the case of manufacturing a rectangular coil-shaped component, the direction of insertion and assembly into the suction tool housing container 105 can be defined, that is, the suction tool housing container 105 can be inserted and assembled from the short side of the rectangle, and the operability can be improved.

The perforation 110 is illustrated as being bent from the coil-shaped portion toward the coil center and the tip end portion thereof is bent toward the grip portion 109, but may be bent directly from the coil-shaped portion toward the grip portion 109 without being bent toward the coil center.

Further, in the adsorbing material container 105 of the gas adsorbing device 104, the case where the laminated film 112 is formed into a bag shape is exemplified in the above-described embodiment, but it may be configured such that the opening of a flat metal container is sealed with the laminated film 112.

The porous member 118 is formed by sintering resin powder as an example, but may be formed of a material such as a nonwoven fabric or the like, or may have a pore shape other than three-dimensional network pores, such as a group of straight through pores having a diameter smaller than the powder particle diameter of the gas adsorbing member 106.

Further, the vacuum heat insulator 101 is exemplified in the case where the core member 103 is pressure-reduced and sealed in the flexible sheath 102, but it may be a case where the sheath 102 is made of a rigid body having no flexibility, for example, a case made of a metal plate or a resin plate, or a case made of a metal plate or a resin plate, and the opening of the case is sealed with a flexible sheet material, and various cases can be assumed.

As described above, the embodiments disclosed herein are illustrative in all aspects and should not be considered restrictive, and the scope of the present invention is indicated by the claims rather than the above description, and is intended to include all modifications equivalent in meaning and within the scope of the claims

Industrial applicability

As described above, the present invention is highly productive, can be provided at low cost, is thin and flexible, and therefore can be applied to various vacuum heat-insulating materials, and has a remarkable effect of maintaining a gas adsorption capacity for a long time. Therefore, the present invention can be suitably used in applications where a heat insulating material having excellent heat insulating performance and excellent long-term durability is required, for example, heat insulators for refrigerators, heat and cold insulation containers, vending machines, heat pump water heaters, electric water heaters, transportation containers, automobiles, railway vehicles, LNG ships, houses, and the like, and is useful.

Description of the symbols

1. 101 vacuum heat-insulating member

2. 102 outer covering

3. 103 core material

4. 104 gas adsorption device

5 wrapping bag

6. 106 gas adsorption piece

7. 118 porous member

7a cross-face section

8 protrusion

9. 108 unsealing member

10 film

10a protective layer

10b gas barrier layer

10c bonding layer

11. 114 vacuum packing device

12. 115 reduced pressure chamber

13. 116 vacuum pump

14. 117 heat sealer

15. 119 moisture adsorbing member

105 adsorbing material container

105a thin wall part

109 grip part

110 perforation part

112 laminated film

112a protective layer

112b gas barrier layer

112c bonding layer

Claims

1. A gas adsorption device, comprising:

a covering bag having gas barrier properties and flexibility;

a gas adsorbing member which is encapsulated in the envelope bag under reduced pressure; and

a porous member which is disposed in the covering bag so as to be adjacent to the gas adsorbing member in a planar state, the porous member having a porous structure which allows gas to pass therethrough but does not allow powder particles of the gas adsorbing member to pass therethrough,

the gas adsorbing device has an unsealing member having a protrusion at a portion of the envelope opposed to the intersecting surface portion of the porous member.

2. The gas adsorption device of claim 1, wherein:

the cross-face portion of the porous member is heat-fused to the inner surface of the sheathing bag.

3. The gas adsorption device of claim 1, wherein:

the coated bag is composed of a multi-layered laminated film comprising a gas barrier layer containing a metal foil,

the innermost film member among the multi-layered laminate films is thermally welded to the porous member.

4. The gas adsorption device of claim 1, wherein:

the porous member is formed by sintering resin powder.

5. The gas adsorption device of claim 1, wherein:

the gas adsorption member is copper ion exchange ZSM-5 type zeolite.

6. A gas adsorption device as claimed in claim 3, wherein:

the laminated film forming the covering bag further has a protective layer covering a surface of the gas barrier layer.

7. The gas adsorption device of claim 6, wherein:

the protective layer is made of polyethylene terephthalate PET or a resin having a water absorption rate equal to or lower than that of PET.

8. The gas adsorption device of claim 1, wherein:

a moisture adsorbing member is provided between the gas adsorbing member and the porous member.

9. A vacuum insulation, comprising:

a gas adsorption device as claimed in any one of claims 1 to 8;

a core material; and

the outer covering part is arranged on the outer side of the body,

the vacuum heat insulator is configured by inserting the gas adsorbing device and the core material into the outer cover and sealing them under reduced pressure.

10. The vacuum insulation of claim 9, wherein:

in the gas adsorbing device, a part of the porous member is perforated, whereby the inside of the outer cover communicates with the inside of the gas adsorbing device.