JP6498097B2 - Vacuum heat insulating material, method for manufacturing vacuum heat insulating material, and heat insulation container - Google Patents

Description

  The present invention relates to a vacuum heat insulating material provided with a through hole, a method for manufacturing a vacuum heat insulating material, and a heat insulating container using the vacuum heat insulating material.

  The vacuum heat insulating material can reduce the thermal conductivity by an order of magnitude or more compared to conventional glass wool heat insulating materials. For this reason, the vacuum heat insulating material is widely used as a heat insulating material with an improvement in energy saving awareness, but the degree of freedom in shape is limited in order to maintain a vacuum state.

  A technique for providing a through hole in a vacuum heat insulating material has been proposed for use in a cooling / heating apparatus or the like that often has projections such as piping. For example, in Patent Document 1, a core material that can be heat-sealed is used, and the heat-sealing layer and the core material of the jacket material are heated to form a welded portion that is continuously integrated in the thickness direction of the core material. And the technique which provides a through-hole in a vacuum heat insulating material so that this welding part and the jacket material which faces may be penetrated is proposed.

JP 2010-65711 A

  The through-hole described in Patent Document 1 heats the core material to the melting point or higher to weld the core material to the jacket material. Therefore, the core material around the through hole becomes a solid material. Unlike the other core material portions, the core material portion that has become a solid material has a problem in that the heat transfer performance is increased in the thickness direction, which deteriorates the heat insulation performance itself.

  The present invention has been made to solve the above-mentioned problems, and even if a through hole is provided, it is possible to suppress the deterioration of the heat insulating performance and maintain good gas sealability around the through hole. An object is to provide a highly reliable vacuum heat insulating material, a method for manufacturing the vacuum heat insulating material, and a heat insulating container using the vacuum heat insulating material.

A vacuum heat insulating material according to the present invention includes a core material having a core material body having a laminated body of fibers and a core material penetrating portion penetrating the core material body, a jacket material covering the core material body, and the core A partition film installed in the jacket material together with a material, an exterior penetration portion that penetrates the partition film and the jacket material in the core material penetration portion, and the jacket material in the core material penetration portion An exterior seal portion sealed with the partition film, and the partition film covers a side surface of the core material facing the exterior penetration portion, and a part of the partition film melts with the jacket material in the exterior seal portion. The other part which is attached and not fused is arranged so as to cover the core material penetration part.

Manufacturing method of the vacuum heat insulating material according to the present invention, the plane of the core material made of a fiber aggregate, a step of providing the core material through portion that penetrates the core body of the core material, the core material through section A step of disposing a partition film covering a side surface of the core material, a step of inserting the core material in which the partition film is disposed in the core material penetrating portion into an outer cover material, and the outer cover material and the partition A step of thermally fusing the film, and a step of punching through the exterior penetration portion passing through the core material penetration portion in the jacket material and the partition film that have been thermally fused.

  A heat insulating container according to the present invention includes a heat insulating body having a pipe or a wiring, and the vacuum heat insulating material that covers the heat insulating body, and the pipe or the wiring includes the core material penetrating portion and the exterior penetrating portion. Through the vacuum heat insulating material.

  According to this invention, a core material can be isolate | separated from the exterior seal part which carried out the heat sealing | fusion of the jacket material and the partition film with the partition film. Therefore, the solidification of the core material can be suppressed even when fusing, and the heat insulation performance can be improved. Further, it is possible to prevent the occurrence of a slow leak path derived from the fibers when the seal layer is in close contact. Furthermore, since the partition film itself is composed of a thin film, heat transfer via the partition film can be suppressed, and the heat insulation performance can be further improved.

It is typical sectional drawing which shows the basic composition applied to the vacuum heat insulating material which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. It is typical sectional drawing which shows the AA cross section of FIG. It is a cross-sectional schematic diagram of the partition film concerning Embodiment 1 of this invention. It is a manufacturing flowchart of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. It is a local cross-sectional schematic diagram of the vacuum heat insulating material which concerns on Embodiment 2 of this invention. It is a local schematic diagram which shows the lamination | stacking concept of the core material of the vacuum heat insulating material which concerns on Embodiment 2 of this invention. It is a local cross-sectional schematic diagram of the vacuum heat insulating material which concerns on Embodiment 3 of this invention. It is a local cross-sectional schematic diagram of another structure of the vacuum heat insulating material which concerns on Embodiment 3 of this invention. It is a local cross-sectional schematic diagram of the vacuum heat insulating material which concerns on Embodiment 4 of this invention. It is a cross-sectional schematic diagram which shows the hot water storage tank which concerns on Embodiment 6 of this invention.

  Hereinafter, embodiments of the vacuum heat insulating material disclosed in the present application will be described in detail with reference to the accompanying drawings. The following embodiments are merely examples, and the present invention is not limited to these embodiments.

Embodiment 1 FIG.
The vacuum heat insulating material according to Embodiment 1 of the present invention will be described. FIG. 1 is a schematic cross-sectional view showing the configuration of the vacuum heat insulating material according to the present embodiment. In the present embodiment, a vacuum heat insulating material 1 having a rectangular flat plate shape is illustrated. As shown in FIG. 1, the vacuum heat insulating material 1 includes a core material 3, a jacket material 4 that covers the core material 3 and is vacuum-sealed, and an adsorbent 5.

  The core material 3 has a laminated structure of a plurality or a single fiber sheet 2. About 90% of the fiber sheet 2 in the volume ratio is a space, and the rest is made of glass fibers. In order to improve the heat insulation performance in the thickness direction of the fiber sheet 2, the glass fiber itself is arranged as parallel as possible to the sheet surface (surface perpendicular to the thickness direction) of the fiber sheet 2. That is, each of the fiber sheets 2 has a laminated structure in which fibers oriented in parallel with the sheet surface (in this example, glass fibers) are laminated in the thickness direction. Therefore, the core material 3 on which the fiber sheet 2 is laminated also has a laminate structure in which the fibers are laminated in the thickness direction.

  As described above, the core material 3 has a fiber laminate structure as a core material body. Moreover, the core material 3 has the core material penetration part 7 which penetrates and penetrates a core material main body.

  The jacket material 4 is composed of two jacket material sheets 4a and 4b sandwiching the core material 3 from both sides in the stacking direction, and covers the core material body. Each of the covering material sheets 4a and 4b is a laminated film having a multilayer structure. The covering material sheets 4a and 4b have seal layers 4a1 and 4b1 as innermost layers, respectively. The seal layers 4a1 and 4b1 serve as joint portions between the covering material sheets 4a and 4b.

  Between the outer peripheral portion of the vacuum heat insulating material 1 and between the outer peripheral end of the outer cover material 4 and the outer peripheral end of the core material 3, the outer cover material sheets 4a and 4b (seal layers 4a1 and 4b1) are in close contact with each other. Fused or welded. Here, the core material 3 does not exist in the thickness direction of the vacuum heat insulating material 1 (stacking direction of the core material 3).

  FIG. 2 is a perspective view of the vacuum heat insulating material 1 according to the first embodiment. FIG. 3 is a schematic cross-sectional view showing a cross section A-A ′ of FIG. 2. As shown in FIG.2 and FIG.3, the vacuum heat insulating material 1 is provided with the exterior penetration part 6 in the center part of the flat thing. An annular partition film 8 is provided in the core material penetrating portion 7 of the core material 3. That is, the partition film 8 installed in the jacket material 4 together with the core material 3 is provided. As shown in FIG. 3, the partition film 8 is disposed so as to contact the core material body of the core material 3 and separate the core material body and the exterior through-hole 6. By forming the exterior seal part 9 in which the jacket material 4 and the partition film 8 are sealed in the core material penetration part 7, the internal pressure of the vacuum heat insulating material 1 having the exterior penetration part 6 is maintained in a vacuum state. . That is, the partition film 8 is arranged such that a part of the partition film 8 is fused to the jacket material 4 in the exterior seal part 9 and the other part that is not fused covers the core material penetration part 7.

  FIG. 4 is a schematic cross-sectional view of the partition film before the exterior through-hole 6 is provided. The partition film 8 is provided with a partition film adhesion portion 8a formed by joining two raw films formed by turning upside down, and the center is located in the core material penetration portion 7, and the core material body and the jacket material 4 is in contact.

  The partition film 8 is formed using a flexible material film. For example, a polymer film of CPP (unstretched polypropylene) having a thickness of 100 μm or less is used as a material film. This material is the same material as that used in the jacket material 4.

  The partition film 8 separates the core material 3 from the exterior penetration portion 6 and separates the core material 3 from the exterior seal portion 9 in the vacuum heat insulating material 1 having the exterior penetration portion 6. Further, a part of the partition film 8 is disposed so as to be sandwiched between the sealing layers 4a1 (4b1) of the covering material sheet 4a (4b) by the exterior sealing portion 9, and the sealing of the covering material sheet 4a (4b). It is heat-sealed with the layer 4a1 (4b1). That is, the portion of the jacket material 4 located at the periphery of the exterior penetration portion 6 and the portion of the partition film 8 located at the periphery of the exterior penetration portion 6 are heat-sealed. For this reason, the outer cover material 4 is configured to contact or closely contact the core material body of the core material 3 and the partition film 8 so as to cover the core material body in a vacuum-sealed manner.

  Next, the manufacturing method of the vacuum heat insulating material 1 which concerns on this Embodiment 1 is demonstrated. FIG. 5 is a manufacturing flow diagram illustrating a method for manufacturing the vacuum heat insulating material 1 according to the first embodiment. In FIG. 5, the exterior penetration part 6, the core material penetration part 7, the partition film 8, and the exterior seal part 9 are shown. In addition, the thickness etc. of the partition film 8 shown in FIG. 5 and the jacket material 4 are examples, and this invention is not restrained by the thickness and structure in a figure.

  First, a method for forming the fiber sheet 2 using a papermaking method will be described. First, chopped fibers obtained by cutting glass fibers having a diameter of 4 to 13 μm manufactured by a continuous filament manufacturing method into lengths of 2 to 15 mm and fine fibers having a diameter of about 1 μm manufactured by a flame method are dispersed in a liquid.

  Using a liquid in which chopped fibers and small-diameter fibers are dispersed, paper is made with an automatic feed type paper machine or the like and then dried to produce a fiber sheet original fabric having a thickness of about 0.5 mm. The produced fiber sheet original fabric is cut so that the required size of the vacuum heat insulating material 1 is about the area of the vacuum heat insulating material 1 to form a plurality of fiber sheets 2. In the fiber sheet 2 formed by using the above papermaking method, most of the fibers are oriented in a direction substantially perpendicular to the thickness direction of the fiber sheet 2 (a direction parallel to the sheet surface).

  Next, a method for forming the core material 3 will be described. A plurality of fiber sheets 2 cut into a predetermined size are laminated so as to have a desired thickness assuming a pressure strain due to a pressure difference between atmospheric pressure and vacuum to form a core material 3. The formed core material 3 has a laminated structure in which fibers are laminated in the thickness direction.

  In addition, you may make it a laminated body by winding the fiber sheet original fabric in the shape of a trough without cut | disconnecting. Moreover, although the case where the papermaking method was used for preparation of a fiber sheet original fabric was mentioned as an example, it is not limited to this. For example, a dry manufacturing method using a centrifugal method may be used. In this case, the core material 3 having a laminate structure can be produced by laminating glass fibers in the course of producing glass wool. When produced using a dry production method, the produced fiber sheet is originally a laminated body of fibers, and is composed of one sheet or several sheets for the required thickness. For this reason, the core material 3 may not be a laminated body structure of a plurality of fiber sheets 2 as shown in FIG.

  As shown in FIG. 5, the core material penetrating portion 7 is formed by punching a necessary portion with a desired size into the core material 3 having a laminated structure using, for example, a die cutting cutter. A partition film 8 formed by molding a thin polymer film in advance is inserted into the molded core material penetrating portion 7. In addition, you may implement this shaping | molding of the core material penetration part 7 after drying the core material 3 mentioned later.

  A method for manufacturing the vacuum heat insulating material 1 by inserting the core material 3 into the jacket material 4 will be described. First, the envelope material 4 is manufactured in advance by bonding three sides of the two envelope material sheets. The core material 3 and the adsorbent 5 formed and dried by the above-described method or the like are inserted into the manufactured jacket material 4 and placed in a vacuum chamber. Next, the vacuum chamber is depressurized to a predetermined pressure, for example, a vacuum pressure of about 0.1 to 3 Pa. In this state, the opening formed in the remaining one side of the jacket material 4 is sealed by heat sealing. The vacuum heat insulating material 1 is obtained by returning the inside of the vacuum chamber to atmospheric pressure and taking it out of the vacuum chamber. At this time, in the core material penetrating portion 7, the two jacket material sheets 4 a and 4 b are in a joined state due to the differential pressure with the atmosphere. Here, the vacuum heat insulating material 1 is compressed by the atmospheric pressure after sealing, and the thickness of the core material 3 is about 0.6 or less in terms of the thickness ratio before the jacket material 4 is inserted. Since the partition film 8 is thin and flexible, the partition film 8 can be easily deformed in accordance with the deformation of the core material 3 and the deformation of the jacket material 4. The joint is separately heat sealed with a heat sealer having a hollow shape (such as a donut shape or a frame shape), and the outer cover material 4 is hollowed simultaneously or in a later step. Thereby, the vacuum heat insulating material 1 which has the exterior penetration part 6 is obtained.

  The core material 3 is sandwiched between the two jacket material sheets 4a and 4b and placed in the vacuum chamber. After the pressure in the vacuum chamber is reduced, the surroundings of the two jacket material sheets 4a and 4b are heated. You may make it seal with a seal | sticker. The gas adsorbent is inserted in an amount as required, but may be omitted.

  The internal space of the vacuum heat insulating material 1 manufactured as described above is kept in a vacuum.

  For example, the through-hole described in Patent Document 1 uses a core material that can be heat-sealed, and continuously heats the heat-sealing layer and the core material of the jacket material in the thickness direction of the core material. An integrated weld portion is formed. In this case, since the core material is heated to the melting point or higher and the core material is welded to the jacket material, the core material around the through-hole becomes a solid material, and the heat transfer in the thickness direction from the portion that becomes the solid material is large. Therefore, there is a possibility that the heat insulation performance itself is deteriorated. Further, since the core material is heated to the melting point or higher, high temperature heat is applied to the jacket material, and there is a concern that the long-term reliability of the jacket material may be reduced.

  As described above, in the conventional vacuum heat insulating material provided with the through holes, the risk of deterioration of the heat insulating performance and the risk of lowering the reliability of the jacket material were high.

  A prototype result of the vacuum heat insulating material 1 according to the first embodiment will be described. The core material 3 of the vacuum heat insulating material 1 has a thickness produced by papermaking a chopped glass fiber having an average fiber diameter of 6 μm and a length of about 12 mm and a micro glass fiber fiber of about 0.8 μm manufactured by a flame method. A laminate of 30 fiber sheets 2 having a thickness of about 0.5 mm was used. The planar dimension of the core material 3 was 500 mm × 500 mm. Further, as the covering material sheets 4a and 4b, an aluminum laminate sheet [25 μm-ONy (stretched nylon) / 12 μm-AL vapor-deposited PET (polyethylene terephthalate) / 7 μm-AL foil / 30 μm-CPP (unstretched polypropylene)] is used. It was. Here, the CPP film corresponds to the innermost seal layers 4a1 and 4b1.

  Next, the core material 3 is pierced with a punching cutter so that the core material penetrating portion 7 having a diameter of 80 mm is formed in the flat portion of the core material 3 on which the fiber sheets 2 are laminated, for example, as shown in FIG. A partition film 8 having an outer diameter of 100 mm formed with a material CPP and a thickness of 30 μm was incorporated. In this prototype, a material obtained by forming two material films and turning them upside down and joining them with a partition film adhesion portion 8a having a size about 5 mm smaller than the dimension of the core material penetration portion 7 was used. Further, the partition film 8 is directed from the exterior seal portion 9 toward the core material 3 in the thickness direction so that the partition film 8 is easily deformed with respect to the thickness change of the core material 3 before and after the vacuum heat insulating material 1 is manufactured. Inclined to the side. That is, the partition film 8 includes an inclined portion that is inclined from the thickness direction of the core material 3 to the width direction of the core material 3. Furthermore, this was inserted and vacuum-sealed in the jacket material 4 which was made into a bag by bringing three sides of the jacket material sheets 4a and 4b into close contact in advance. The thickness of the vacuum heat insulating material 1 after vacuum-sealing was about 10 mm when the core material 3 was present. On the other hand, in the core material penetrating portion 7, the jacket material sheets 4a and 4b were joined.

  Next, the core material penetrating portion 7 was heat-sealed with a ring-shaped heat sealer having an outer diameter of 50 mm and an inner diameter of 30 mm to the portion where the jacket material sheets 4a and 4b were joined. Furthermore, the outer covering material sheets 4a and 4b having a diameter of 30 mm, which is the inner portion, were punched to form the exterior through-hole 6. That is, the partition film 8 is disposed in the core material penetration part 7, and the exterior penetration part 6 passes through the partition material 8 and the jacket material 4 through the core material penetration part 7. And the exterior through-hole 6 are configured to overlap.

  When a shrink film (heat-shrinkable film) having a high heat shrinkage is applied as the material of the partition film 8, the partition film 8 is shrunk by heat transmitted during heat-sealing by the heat sealer. Smooth partition film deformation can be realized. As a shrink film, PP (polypropylene), PE (polyethylene), etc. can be used, for example.

  The manufactured vacuum heat insulating material 1 was subjected to a 65 ° C. continuous heating test (200 days) and a heat cycle test (8000 times) of 65 ° C. and 0 ° C. On the other hand, a comparative vacuum heat insulating material is manufactured by the same manufacturing method so as to be the same except for a configuration in which no through portion is provided, and the thermal conductivity of the prototype vacuum insulating material and the comparative vacuum heat insulating material is the same. When changes over time were compared, there was no significant difference over time between the two.

  In the vacuum heat insulating material 1 which concerns on this Embodiment 1, the heat sealing | fusion layer of the exterior seal part 9 of the partition film 8 can be made thicker. Therefore, compared with the core material seal portion sealed on the outer periphery of the core material 3, the seal strength can be improved also in the exterior seal portion 9 where wrinkles are likely to occur due to deformation of the jacket material 4, and the above differences are recognized. It is thought that the result which was not able to be obtained was able to be obtained. Therefore, in the vacuum heat insulating material 1 according to the first embodiment, the deterioration of the vacuum sealing from the exterior seal portion 9 is not recognized even though the punch hole is provided, and high heat insulating performance can be realized.

Embodiment 2. FIG.
The vacuum heat insulating material 1 which concerns on Embodiment 2 of this invention is demonstrated about a composite heat insulating material. FIG. 6 is a schematic local sectional view of the vacuum heat insulating material 1 according to the second embodiment. FIG. 7 is a schematic local sectional view of the core material 3. The core material penetrating portion 7 has a different diameter in the stacking direction. Other configurations are the same as those in the first embodiment.

  In the periphery of the core material penetrating portion 7, there is a tertiary to the jacket material sheet 4 a (4 b) itself by the portion where the core material 3 is present and the portion where the core material 3 is not present and the jacket material sheet 4 a (4 b) is in close contact. Since original restraint arises, there exists a possibility that a clearance gap (space) may arise in the core material penetration part 7 between a core material main body and the jacket material sheet | seat 4a (4b). At this time, since the supporting force by the core material 3 does not act on the covering sheet 4a (4b), a large tension can be applied. As the thickness of the vacuum heat insulating material 1 is larger, the influence of the applied tension becomes more remarkable. The space where the core material 3 is not supported also becomes an acceleration factor of creep deformation of the jacket material sheet 4a (4b) in the long term, and acts as a force to tear the seal surface. It becomes a factor of decline. When using the vacuum heat insulating material 1 in an environment where the temperature is particularly high, it is considered that measures are required. Therefore, in the second embodiment, as shown in FIG. 6, the core material penetrating portion 7 is tapered so that the diameter is different in the direction perpendicular to the planar direction of the core material 3. As shown in FIG. 7, the taper shape was realized by laminating fiber sheets provided with punched holes having different diameters in a stepped shape. That is, the core material body of the core material 3 is provided with a step portion having a step in the thickness direction around the core material penetrating portion, and the step portion of the core material 3 and the inclined portion of the partition film 8 are in contact with each other. is there. The taper angle from the outermost layer of the core material was about 45 °.

  In the vacuum heat insulating material 1 according to the second embodiment, since the gap seen in the core material penetrating portion 7 shown in the first embodiment can be greatly reduced, the load on the jacket material 4 is reduced. Thus, it is possible to realize the vacuum heat insulating material 1 having a penetrating portion with higher reliability for a longer period.

Embodiment 3 FIG.
The vacuum heat insulating material 1 which concerns on Embodiment 3 of this invention is demonstrated about a composite heat insulating material. FIG. 8 is a schematic local cross-sectional view of the vacuum heat insulating material 1 according to the third embodiment. The core material 3 has a laminated structure of needle punch fiber sheets 11. Other configurations are the same as those in the first embodiment.

  In the fiber sheet manufacturing process, the needle punched fiber sheet 11 is originally oriented in the plane direction by opening and closing the chopped strand fiber obtained by cutting the continuous filament fiber into a sheet and inserting and removing a plurality of needles. A part of the fibers that are left in the direction perpendicular to the plane direction are bound to each other to form a fiber sheet. For this reason, the binding force is weak in a portion where there is no fiber perpendicular to the planar direction. Therefore, for example, when a square vacuum heat insulating core material is used, the end portion (peripheral portion) has a characteristic of easily spreading. Therefore, this needle punch fiber sheet 11 is applied as the core material 3. With this configuration, the needle punch fiber sheet 11 around the penetrating portion is expanded, and can be naturally deformed along the jacket material 4 without performing the taper shape processing as shown in the second embodiment. Therefore, the gap can be reduced. Accordingly, the gaps seen in the core material penetrating portion 7 can be reduced to a large area without particularly processing the fiber sheet in particular, the load on the jacket material 4 is reduced, and the long-term reliability is high. The vacuum heat insulating material 1 with a penetration part is realizable.

  FIG. 9 is a local cross-sectional schematic view of the vacuum heat insulating material 1 showing a modification of the third embodiment. The exterior seal portion 9 has a wave structure. Other configurations in the modification are the same as those in the third embodiment.

  This time, the wave-shaped processing was performed with the width of the exterior seal portion 9 being about 12 mm, the amplitude being about 1 mm, and the period being about 4 mm. That is, it processed so that the corrugated site | part shape | molded by the corrugated shape might be provided in the sealing layers 4a1 and 4b1 of the jacket material 4. In the processing method, an annular heating seal plate is processed into a wave shape in advance so that the convex portion and the concave portion coincide with each other in the upper and lower directions in the core material stacking direction.

  Even if, for example, fibers or the like are caught in the outer seal portion 9 in the radial direction of the hole, the pressure rises locally at the convex portions when the seal is formed, and the fibers are cut. As a result, it is possible to prevent the fibers from biting into the entire seal width as a continuous body. Therefore, the vacuum heat insulating material 1 with high reliability can be realized with respect to the gas sealing property of the exterior seal portion 9.

  In the figure, the needle punch fiber sheet 11 is described as a single layer, but a plurality of thin sheets may be laminated to have a desired thickness.

Embodiment 4 FIG.
The vacuum heat insulating material 1 which concerns on Embodiment 4 of this invention is demonstrated about a composite heat insulating material. FIG. 10 is a schematic local sectional view of the vacuum heat insulating material 1 according to the present embodiment. The exterior seal portion 9 is configured to be biased to one side with respect to the stacking direction of the core material 3 from half of the thickness of the core material 3 (upper side in the drawing). In other words, the core material penetrating portion of the core material 3 and the partition film 8 and the outer cover penetrating portion of the jacket material 4 are arranged so as to be shifted to one side in the thickness direction from the center in the thickness direction of the core material 3. . Other configurations are the same as those of the third embodiment.

  In general, the polymer film tends to increase in gas permeability as the environmental temperature increases. When the vacuum heat insulating material 1 is applied to a heat-insulated portion having a high surface temperature, the vacuum heat insulating material 1 with higher reliability can be realized by disposing the exterior seal portion 9 on the low temperature side. As a result, for example, when an object to be insulated with a surface temperature of 90 ° C. is insulated, the temperature of the exterior seal portion 9 can be lowered, so that the amount of gas intrusion from the seal portion can be reduced and the deterioration of the vacuum degree over time is suppressed. can do.

  Note that this shape can be realized by pressing the core material penetrating portion 7 with jigs having different heights from above and below at the time of vacuum-sealing the entire core material in the manufacturing process of the vacuum heat insulating material 1.

Embodiment 5. FIG.
The vacuum heat insulating material 1 which concerns on Embodiment 5 of this invention is demonstrated about a composite heat insulating material. As the partition film 8, LLDPE (linear low density polyethylene) having a thickness of 100 μm or less is used. Other configurations are the same as those in the first to third embodiments.

  Since the partition film 8 is made of LLDPE, it has flexibility. Moreover, in this structure, the sealing layer of the jacket material 4 is comprised by CPP whose melting | fusing point is higher than LLDPE. That is, the jacket material 4 has a sealing layer having a melting point higher than that of the partition film 8. Therefore, the melting point of the partition film 8 is lower than that of the sealing layer of the jacket material 4.

  In the fifth embodiment, since the melting point of the partition film 8 disposed in the central portion in the thickness direction of the exterior seal portion 9 is low, it is possible to shorten the seal heating time for heat-sealing the material. Therefore, the production efficiency of the vacuum heat insulating material 1 having a punched structure can be improved.

Embodiment 6 FIG.
FIG. 11: is a longitudinal cross-sectional view which shows the hot water storage tank which concerns on Embodiment 6 of this invention as a heat retention container which concerns on this invention. The hot water storage tank 50 according to the sixth embodiment includes a tank 103 that stores heated water, and a heat insulating material that covers the outer periphery of the tank 103 and insulates between the tank 103 and ambient air. .

  The tank 103 has a substantially cylindrical shape, for example, and is connected to a plurality of pipes. Specifically, an upper pipe 100 and a hot water supply pipe 101 are connected to the upper part of the tank 103. A bottom pipe 105 and a water supply pipe 104 are connected to the lower part of the tank 103. The upper pipe 100 and the lower pipe 105 are connected to a heating device (not shown) such as a heat pump unit, for example.

  The tank 103 configured as described above is configured to store heated water therein as follows. The water stored in the tank 103 is sent to a heating device (not shown) through the bottom pipe 105 and heated. The heated water is returned to the upper part in the tank 103 through the upper pipe 100. When water (for example, city water) is supplied from the outside to the tank 103, water is supplied from the water supply pipe 104 to the lower portion of the tank 103. Further, by supplying water to the tank 103, hot water (heated water) stored in the tank 103 is pushed up. With this operation, hot water is supplied to the outside from the hot water supply pipe 101 connected to the upper part of the tank 103. At this time, a temperature stratification in which the high temperature portion and the low temperature portion are separated due to the temperature difference between hot water and water is formed in the tank 103.

  The tank 103 is covered with an insulating member as described below, and is insulated from the surrounding air. The upper surface of the tank 103 is covered with a first foam heat insulating material 102a formed of a foamed resin (for example, a beaded polystyrene foam). The first foam heat insulating material 102a is formed with a through portion through which the upper pipe 100 and the hot water supply pipe 101 can penetrate. Moreover, the recessed part is formed in the upper surface part of the 1st foam heat insulating material 102a.

  Moreover, the vacuum heat insulating material 1 shown in any one of Embodiment 1-Embodiment 4 is provided in this recessed part. Here, in the installation range of the vacuum heat insulating material 1, two pipes (upper pipe 100 and hot water supply pipe 101) are provided. For this reason, in order to prevent interference with these piping and the vacuum heat insulating material 1, the vacuum heat insulating material 1 is formed with a first exterior through portion 6a and a second exterior through portion 6b. And the upper piping 100 has penetrated each.

  In addition, since the heated water is stored in the tank 103, when the tank 103 and ambient air are compared, the tank 103 becomes hotter. For this reason, the exterior seal part in the vacuum heat insulating material 1 is disposed on the lower temperature side than 1/2 of the vacuum heat insulating material 1 thickness. With this arrangement configuration, it is possible to arrange the vacuum heat insulating material 1 with high reliability.

  The side surface of the tank 103 is covered with a second foam heat insulating material 102b formed of a foamed resin (for example, foamed polystyrene). Further, the lower surface of the tank 103 is covered with a third foam heat insulating material 102c formed of a foamed resin (for example, foamed polystyrene). The third foam heat insulating material 102c is formed with a through portion through which the bottom pipe 105 and the water supply pipe 104 penetrate.

  In the sixth embodiment, the side surface portion and the lower portion of the tank 103 are insulated with only the foam heat insulating material, but the vacuum heat insulating material 1 may be provided on the side surface portion and the lower portion of the tank 103.

  As a result, by using the vacuum heat insulating material 1 shown in the first to fourth embodiments also for a tank (insulated body) having interferences such as piping and measurement lines in the installation range of the vacuum heat insulating material 1 The vacuum heat insulating material 1 having high heat insulating performance is applied with high reliability, and the heat radiation of the device can be reduced.

  In the sixth embodiment, the tank 103 has been described. However, the present invention is not limited to this and may be a high-temperature or low-temperature heat-insulated body such as a cold-heating device.

  The invention is not limited to the specific details and exemplary embodiments described and described above. Further variations and effects that can be easily derived by those skilled in the art are also included in the present invention. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 Vacuum heat insulating material, 2 Fiber sheet, 3 Core material, 4 Outer material, 4a, 4b Outer material sheet, 4a1, 4b1 Seal layer, 5 Adsorbent, 6 Exterior penetration part, 6a First exterior penetration part, 6b 2nd exterior penetration part, 7 core material penetration part, 8 partition film, 8a partition film adhesion | attachment part, 9 exterior seal part, 10 level | step difference core material, 11 needle punch fiber sheet, 12 corrugated punching seal, 100 upper piping, 101 Hot water supply piping, 102a, 102b, 102c Thermal insulation, 103 tank, 104 Water supply piping, 105 Bottom piping.

Claims (15)

A core material having a core material body having a laminate of fibers and a core material penetrating portion penetrating the core material body; and
A jacket covering the core body;
A partition film installed in the jacket material together with the core material;
In the core material penetration part, an exterior penetration part that penetrates the partition film and the jacket material,
An outer seal part in which the outer cover material and the partition film are sealed in the core material penetrating part,
The partition film is
Cover the side surface of the core material facing the exterior through-hole,
A vacuum heat insulating material, characterized in that a part thereof is fused to the outer cover material in the exterior seal portion, and the other portion not fused covers the core material penetration portion.   2. The vacuum heat insulating material according to claim 1, wherein the jacket material has a seal layer made of the same material as the partition film.   The vacuum jacket according to claim 1, wherein the jacket material has a seal layer having a melting point higher than that of the partition film. The partition film includes a plate-like plate-shaped portion and an inclined portion that is inclined in the width direction of the core material from the thickness direction of the core material,
The vacuum heat insulating material according to claim 1, wherein the outer cover material and the core material main body sandwich the inclined portion.   The vacuum insulation material according to claim 1, wherein the partition film is a shrink film.   The vacuum heat insulating material according to claim 2 or 3, wherein the seal layer includes a corrugated portion formed into a corrugated shape. Wherein A the outer instrumentation through portion and the core penetration portion, claim 2, characterized in that also the center of the thickness direction of the core material is arranged at a position shifted to one side of the thickness direction, Or the vacuum heat insulating material of any one of 6. The core material body includes a step portion having a step in the thickness direction around the core material penetrating portion,
The vacuum heat insulating material according to claim 4, wherein the stepped portion and the inclined portion are in contact with each other.   The vacuum heat insulating material according to any one of claims 1 to 8, wherein the core body includes a fiber sheet in which chopped fibers are bound. A core material having a core material body having a laminate of fibers and a core material penetrating portion penetrating the core material body; and
A jacket covering the core body;
A partition film installed in the jacket material together with the core material;
In the core material penetration part, an exterior penetration part that penetrates the partition film and the jacket material,
An outer seal part in which the outer cover material and the partition film are sealed in the core material penetrating part,
The partition film is
It said outer and covering material and fused at a portion of the outer seal portion, Ri tear another part which is not fused is placed over the core through portion,
A plate-shaped plate-shaped portion, and an inclined portion inclined from the thickness direction of the core material to the width direction of the core material,
A vacuum heat insulating material , wherein the jacket material and the core main body sandwich the inclined portion . A core material having a core material body having a laminate of fibers and a core material penetrating portion penetrating the core material body; and
A jacket covering the core body;
A partition film installed in the jacket material together with the core material;
In the core material penetration part, an exterior penetration part that penetrates the partition film and the jacket material,
An outer seal part in which the outer cover material and the partition film are sealed in the core material penetrating part,
The partition film is
It is a shrink film, a part of which is arranged so as to be fused with the jacket material in the exterior seal part, and another part that is not fused is arranged to cover the core material penetrating part. Vacuum insulation. A heat insulator with piping or wiring;
The vacuum heat insulating material according to any one of claims 1 to 11 , which covers the heat retaining body,
The heat insulating container, wherein the pipe or the wiring penetrates the vacuum heat insulating material through the core material penetration part and the exterior penetration part. A step of providing a core material penetrating portion that penetrates the core material body of the core material on the plane of the core material composed of a fiber assembly;
A step of disposing a partition film covering a side surface of the core material to the core through section,
Inserting the core material in which the partition film is disposed in the core material penetrating portion into a jacket material;
Heat-sealing the jacket material and the partition film;
A step of punching through the exterior penetration portion passing through the core material penetration portion to the outer cover material and the partition film that are heat-sealed;
The manufacturing method of the vacuum heat insulating material characterized by comprising. A step of providing a core material penetrating portion that penetrates the core material body of the core material on the plane of the core material composed of a fiber assembly;
A step of disposing a partition film in the core material penetrating portion;
Inserting the core material in which the partition film is disposed in the core material penetrating portion into a jacket material;
A plate-shaped portion of the partition film formed in a plate shape, and an inclined portion formed so as to be inclined from the thickness direction of the core material of the partition film in the width direction of the core material; Sandwiching between the core material body and heat-sealing the jacket material and the partition film;
A step of punching through the exterior penetration portion passing through the core material penetration portion to the outer cover material and the partition film that are heat-sealed;
The manufacturing method of the vacuum heat insulating material characterized by comprising. A step of providing a core material penetrating portion that penetrates the core material body of the core material on the plane of the core material composed of a fiber assembly;
A step of disposing a partition film which is a shrink film in the core material penetrating portion;
Inserting the core material in which the partition film is disposed in the core material penetrating portion into a jacket material;
Heat-sealing the jacket material and the partition film;
A step of punching through the exterior penetration portion passing through the core material penetration portion to the outer cover material and the partition film that are heat-sealed;
The manufacturing method of the vacuum heat insulating material characterized by comprising.

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