JP2015078707A - Vacuum heat insulation material, heat insulation box using vacuum heat insulation material, apparatus using vacuum heat insulation material and manufacturing method for vacuum heat insulation material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material capable of preventing bag breakage of an outer packaging material while suppressing deterioration of a heat insulation property according to groove formation, a heat insulation box and an apparatus using the vacuum heat insulation material, and a manufacturing method.SOLUTION: In a vacuum heat insulation material, a core material 4 is sealed in an outer packaging material 2 having a gas barrier property. The vacuum heat insulation material has a square folding part 11a, and a plurality of strips of grooves 5a extending to both end parts in a width direction are formed at a corner part inside the square folding part 11a. At least from an outer surface 11b to a side surface 11c and an inner surface 11d of both end parts in the width direction in the square folding part 11a, a resin tape 13 having a heat insulation property is attached.

Description

  The present invention relates to a vacuum heat insulating material and a heat insulating box using the vacuum heat insulating material, in particular, a vacuum heat insulating material and a heat insulating box suitable for use in a cold heat apparatus, an apparatus, a manufacturing method, and the like.

  Conventionally, urethane foam has been used as a heat insulating material used in a heat insulating box such as a refrigerator. In recent years, due to market demands for energy saving and space saving, large capacity, that is, by increasing the internal volume in a limited space by thinning the heat insulation wall, vacuum foam with better heat insulation performance than urethane foam Forms that are embedded and used in combination have come to be used. Such a vacuum heat insulating material is also used for a refrigerator or the like.

  The vacuum heat insulating material is generally configured by inserting powder, foam, fiber, or the like as a core material into an outer packaging material made of a plastic laminate film using an aluminum foil as a gas barrier layer. The inside of the vacuum heat insulating material is kept at a vacuum degree of 1 Pa to 3 Pa (pascal) or less.

  Further, an adsorbent that adsorbs gas and moisture is disposed in the outer packaging material in order to suppress the deterioration of the degree of vacuum, which is a factor of lowering the heat insulating performance of the vacuum heat insulating material. As the core material of the vacuum heat insulating material, powders such as silica, foams such as urethane, fiber bodies and the like are used. At present, fibrous materials having excellent heat insulating performance are mainly used as core materials for vacuum heat insulating materials.

  Examples of the fiber material include inorganic fibers such as glass fibers and ceramic fibers (see, for example, Patent Document 1 and Patent Document 8).

  Other fiber materials include organic fibers such as polypropylene fibers, polylactic acid fibers, aramid fibers, LCP (liquid crystal polymer) fibers, polyethylene terephthalate fibers, polyester fibers, polyethylene fibers, and cellulose fibers (for example, patent documents). 2 and Patent Document 7).

  The shape of the fibrous body includes a cotton-like shape and a laminate of sheets (see, for example, Patent Document 3 and Patent Document 4). In addition, there are other fiber bodies in which sheets are laminated so that fiber orientations alternate (see, for example, Patent Document 5, Patent Document 6, and Patent Document 9).

  Most of the vacuum heat insulating materials have a flat plate shape (planar shape) mainly due to the manufacturing method and reliability, and are applied to products such as refrigerators as they are. However, the part to be insulated is not necessarily in a planar shape, for example, when a vacuum heat insulating material is disposed at a corner portion extending over two surfaces in a refrigerator box formed by an inner box and an outer box, It is difficult to apply a flat vacuum heat insulating material as it is.

  Also, simply pressing the mold against the part to be bent of the flat vacuum heat insulating material will cause irregular wrinkles in the bent part after processing, and the outer packaging material will break at the intersection of the wrinkles. As a result, gas barrier properties are reduced. Furthermore, irregularly generated wrinkles cause a difference in repulsive force, resulting in a variation in bending angle.

  Therefore, there is a demand for a technique for processing a flat vacuum heat insulating material into an L shape (square shape). As a typical example, a surface on the inner side of the bent portion of the flat vacuum heat insulating material to be bent. By pressing a mold having one or more protrusions on the plate, one or two or more of the same length as the width of the vacuum heat insulating material is applied to a portion of the flat vacuum heat insulating material to be bent. A method has been proposed in which a groove is provided and processed into an L-shape (square shape) in the next process (see, for example, Patent Document 10 and Patent Document 11). In addition, in Patent Document 10, a flexible sheet-like heat insulating material is interposed between the folded inner surface of the bent vacuum heat insulating material and the heat insulating symmetrical material, thereby causing subtle unevenness on the surface of the vacuum heat insulating material. A method for preventing the convection of the generated air and improving the heat insulation performance has also been proposed.

JP-A-8-028776 (paragraphs [0005], [0006]) JP 2002-188791 A (summary) Japanese Patent Laying-Open No. 2005-344832 (paragraph [0007]) Japanese Patent Laying-Open No. 2006-307921 (Claim 1) JP 2006-017151 A (summary) Japanese Patent Publication No. 7-103955 (Claim 1) JP 2006-283817 A (Claims 1, 3, 6) JP 2005-344870 A (summary) JP 2008-223922 A (summary) JP 2007-1555065 A (FIGS. 6 to 9) Japanese Patent Laid-Open No. 2000-097390 (FIG. 21)

  Conventionally, heat insulation performance is improved by interposing a flexible sheet-like heat insulating material between the bent inner surface of the vacuum heat insulating material bent with a groove as described above and a heat insulating symmetrical object. .

  However, the amount of heat transmitted through the outer surface of the outer packaging material is larger than the problem of the amount of heat transmission due to the thickness of the vacuum heat insulating material itself being reduced by the groove as a factor that gives the heat insulating performance of the vacuum heat insulating material. Particularly, since the groove is provided on the inner surface of the bent portion, the amount of heat transmitted through the outer packaging material surface layer from the outer surface to the side surface and the inner surface at both ends of the groove becomes a problem, but in reality, no measures are taken.

  In addition, when a groove is formed on the inner surface of the portion to be bent and bent, an excess portion of the outer packaging material jumps out into a chevron at the end of the groove, which makes it easier to break the portion. .

  In addition, in the conventional vacuum heat insulating material manufacturing method in which the process of forming a groove on the inner surface of the flat vacuum heat insulating material to be bent and the actual bending process are performed in separate processes, In addition, there is a problem that the positional accuracy during processing cannot be secured.

  The present invention has been made in order to solve the above-described problems, and provides a vacuum heat insulating material and a manufacturing method capable of preventing breakage of the outer packaging material while suppressing a decrease in heat insulating performance due to groove formation, and The main object is to provide a heat insulation box and equipment using a vacuum heat insulating material with less heat loss.

  The vacuum heat insulating material according to the present invention is a vacuum heat insulating material in which a core material is sealed in a gas barrier outer packaging material, and has a square bent portion, and both ends in the width direction at corner portions inside the square bent portion. A plurality of grooves extending in the section are formed, and a resin tape having heat insulating properties is affixed from the outer surface to the side surface and the inner surface of both end portions in the width direction in at least the rectangular bent portion.

In the vacuum heat insulating material according to the present invention, a plurality of grooves extending at both ends in the width direction are formed in the corner portion inside the square bent portion, and at least the width in the square bent portion. Since the heat-insulating resin tape is affixed from the outer surface to the side surface and the inner surface at both ends of the direction, it is possible to effectively cover the point where the most amount of heat is transmitted, and to improve the overall heat insulating performance Can do. Moreover, the site | part from which the excess part of an outer packaging material protrudes in a mountain shape can be protected with a resin tape, a bag breakage can be prevented, and long-term reliability can be ensured.
And by applying the vacuum heat insulating material of the present invention to a product such as a refrigerator, the heat insulation effect of the product is improved, the thickness of the product wall can be reduced, and the internal volume is increased in a limited space of the product. be able to.

It is a perspective view which shows the vacuum heat insulating material (1st vacuum heat insulating material) before the bending process which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the vacuum heat insulating material (1st vacuum heat insulating material) before the bending process which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the lamination | stacking state of the core material of the vacuum heat insulating material (1st vacuum heat insulating material) before the bending process which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the bending process in the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. It is a perspective view of the bending jig with a protrusion used for the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. It is a perspective view which shows the vacuum heat insulating material (2nd vacuum heat insulating material) after the bending process manufactured with the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. In a state in which the wrinkle portion generated inside the corner portion of the bent portion of the vacuum heat insulating material after bending (second vacuum heat insulating material) manufactured by the vacuum heat insulating material manufacturing method according to Embodiment 1 of the present invention is unfolded. It is a perspective view shown. It is a perspective view which shows the vacuum heat insulating material (2nd vacuum heat insulating material) after the resin tape sticking produced with the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 of this invention. Wrinkles and resin tapes generated inside the corners of the bent portions of the vacuum heat insulating material (second vacuum heat insulating material) after the resin tape is manufactured by the vacuum heat insulating material manufacturing method according to Embodiment 1 of the present invention It is a perspective view shown in the state which developed the relationship. It is a schematic diagram which shows the bending process in the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 2 of this invention. Wrinkles and resin tapes generated inside the corners of the bent portions of the vacuum heat insulating material (second vacuum heat insulating material) after the resin tape is manufactured by the method for manufacturing a vacuum heat insulating material according to Embodiment 2 of the present invention It is a perspective view shown in the state which developed the relationship. A wrinkle portion generated inside the corner portion of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after bending according to the comparative example manufactured by the conventional manufacturing method is shown in FIG. Sectional drawing and (b) are front views of the corner part of a bending part. The wrinkle part which generate | occur | produced inside the corner part of the bending part of the vacuum heat insulating material (2nd vacuum heat insulating material) after the bending process manufactured with the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 and Embodiment 2 of this invention. (A) which shows is sectional drawing of the corner part of a bending part, (b) is a front view of the corner part of a bending part. It is sectional drawing which shows typically the heat insulation box (refrigerator) which concerns on Embodiment 3 of this invention. It is a longitudinal cross-sectional view of the air conditioning apparatus which concerns on Embodiment 4 of this invention.

  Hereinafter, the manufacturing method of the vacuum heat insulating material which concerns on embodiment of this invention is demonstrated, referring drawings.

Embodiment 1. FIG.
FIG. 1 is a perspective view showing a vacuum heat insulating material (first vacuum heat insulating material) before bending according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the vacuum heat insulating material (first vacuum heat insulating material) before bending according to Embodiment 1 of the present invention. FIG. 3 is an explanatory view showing a laminated state of the core material of the vacuum heat insulating material (first vacuum heat insulating material) before bending according to Embodiment 1 of the present invention.
The vacuum heat insulating material before bending processing according to the first embodiment of the present invention, that is, the first vacuum heat insulating material 5 is composed of a gas barrier outer packaging material 2 having an air barrier property and an outer packaging material 2 as shown in FIGS. It has the core material 4 and the gas adsorbent 3 enclosed, and the inside of the outer packaging material 2 is depressurized to 1 Pa to 3 Pa.

  The outer packaging material 2 of the first vacuum heat insulating material 5 is made of a plastic laminate film having a gas barrier property made of nylon, aluminum vapor-deposited PET, aluminum foil, and high-density polyethylene.

  Moreover, the core material 4 enclosed in the outer packaging material 2 is a laminate of a sheet-like fiber assembly 1, that is, an inorganic fiber nonwoven fabric or an organic fiber nonwoven fabric, as shown in FIG.

  Further, the gas adsorbent 3 is a gas adsorbent or moisture adsorbent for adsorbing residual gas after vacuum packaging, outgas from the core material 4 released over time, and permeated gas entering through the sealing layer of the outer packaging material 2. It is an agent.

  The core material 4 and the gas adsorbent 3 are inserted into a gas barrier outer packaging material 2 having an opening having at least one end opened, and are transported into a vacuum chamber to be sealed in the vacuum packaging material 2 (for example, an opening). ) Is heat sealed to complete the first vacuum heat insulating material 5.

FIG. 4 is a schematic diagram showing a bending step in the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present invention. FIG. 5 is a perspective view of a bending jig with protrusions used in the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present invention. FIG. 6 is a perspective view showing a vacuum heat insulating material after bending (second vacuum heat insulating material) manufactured by the vacuum heat insulating material manufacturing method according to Embodiment 1 of the present invention.
The first vacuum heat insulating material 5 produced as described above is bent using the jig 20 including the base plate 6, the bending jig 8, and the rotating plate 7 shown in FIGS. 4 and 5. . At this time, when the rotating plate 7 is rotated and then returned to its original position, the angle is slightly returned by the spring back, so that the initial target angle is set so as to be the target angle. By changing the target angle, the bending angle of the bent portion formed in the first vacuum heat insulating material 5 can be adjusted.

  As shown in FIGS. 4 and 5, the bending jig 8 has a circular arc surface 8a in the vertical direction formed at the tip over the entire length in the width direction, and a plurality of bending jigs 8 extending in the width direction on the circular arc surface 8a. A strip protrusion 8b is provided side by side. In the case of rectangular bending, when the thickness of the vacuum heat insulating material is 10 mm to 25 mm and the radius of the arc at the inner corner of the rectangular bent portion is 20 mm to 40 mm, the shape of the protrusion 8b is the outer packaging material. In order to suppress damage to 2, the projection radius is set to 2 mm or more and the pitch between the projections 8 b is set to 10 mm or less. The height of the protrusion 8b is 5 mm or less. Thereby, the groove width of each part formed in a vacuum heat insulating material becomes 1 mm-3 mm, and the space | interval (pitch) of a groove part can be 10 mm or less.

  That is, when the thickness of the vacuum heat insulating material is 10 mm or less, it is difficult to ensure the heat insulating performance. Further, when the vacuum heat insulating material is thicker than 25 mm, the difference between the radius of the arc at the inner corner of the rectangular bent portion and the radius of the outer arc becomes large. It becomes difficult to apply the processing to the corner portion of the refrigerator having the thickness of the wall, and the flow path of the polyurethane foam (heat insulating material) flowing into the gap between the wall inner surface and the vacuum heat insulating material cannot be secured. Accordingly, the vacuum heat insulating material has a thickness of 10 mm to 25 mm.

  Further, in the vacuum heat insulating material, when the radius of the arc of the corner portion inside the square bent portion is 20 mm or less, the outer packaging material is easily broken, and the gas barrier property is lowered. Moreover, if the radius of the arc of the corner part inside a square bending part becomes larger than 40 mm, a vacuum heat insulating material will not fit in the corner part of the wall of a refrigerator. Accordingly, in the vacuum heat insulating material, the radius of the arc of the corner portion inside the square bent portion is set to 20 mm to 40 mm.

  The bending jig 8 is provided with a non-slip 10 on one end face (lower end face) facing the base plate 6 via the first vacuum heat insulating material 5. Fixing is ensured.

  On the other hand, the rotating plate 7 is provided with a plurality of rollers 9 that can roll while pressing the first vacuum heat insulating material 5, and the rollers 9 rub against the outer packaging material 2 and the rotating plate 7 due to friction. Generation | occurrence | production is prevented and the damage of the outer packaging material 2 is suppressed.

  In the bending process, the part to be bent of the first vacuum heat insulating material 5 is first sandwiched and fixed between the base plate 6 and the bending jig 8. At this time, the tip of the bending jig 8 is directed to the portion to be bent of the first vacuum heat insulating material 5, and a part of the protrusion 8 b of the bending jig 8 bites into the first vacuum heat insulating material 5. The first vacuum heat insulating material 5 can be fixed. Further, the first vacuum heat insulating material 5 can be reliably fixed by the anti-slip 10 provided on the surface of the bending jig 8 facing the first vacuum heat insulating material 5.

  After the first vacuum heat insulating material 5 is fixed, the first vacuum heat insulating material 5 is bent while rotating the rotating plate 7 to a target angle. That is, after turning back to the target angle so that the part to be bent of the first vacuum heat insulating material 5 is pressed against the tip of the bending jig 8 by the rotating plate 7, the rotating plate 7 is returned to the original position. The rotation center of the rotating plate 7 at this time is adjusted to coincide with the center of the arcuate surface 8a of the bending jig 8. In addition, although rubbing occurs due to friction between the outer packaging material 2 and the rotating plate 7, damage to the outer packaging material 2 can be suppressed by the rollers 9 provided on the rotating plate 7. When the rotating plate 7 is returned to the original position, the bent portion of the first vacuum heat insulating material 5 returns a little by springback, but the initial target angle is set so that the returned position becomes the target angle. ing. Thus, the bent portion 11a as shown in FIG. 4 and a plurality of grooves 5a extending in the width direction at the inner corner portion of the bent portion 11a are simultaneously formed in the first vacuum heat insulating material 5, as shown in FIG. Thus, the second vacuum heat insulating material 11 having the bent portion 11a is completed.

FIG. 7 shows the wrinkles generated inside the corners of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after the bending process manufactured by the vacuum heat insulating material manufacturing method according to Embodiment 1 of the present invention. It is a perspective view shown in the state.
As for the 2nd vacuum heat insulating material 11 produced as mentioned above, the thickness of the vacuum heat insulating material itself becomes thin in the wrinkle part 12c of a bending part like FIG. Therefore, the heat transfer path A is shortened, and the amount of heat that is transmitted is increased as compared with the heat transfer path B of the flat plate portion having no groove. However, as described above, as a factor given to the heat insulating performance, from the outer surface 11b of the outer packaging material surface layer portion, particularly the both sides of the second vacuum heat insulating material 11, more than the amount of heat transmitted through the heat transfer path. The amount of heat transmitted through the outer packaging material surface layer over the side surface 11c and the inner surface 11d is larger. Therefore, in the next step, the point where the amount of heat transmitted is the largest is covered with the resin tape 13 having heat insulation properties.

FIG. 8 is a perspective view showing the vacuum heat insulating material (second vacuum heat insulating material) after the resin tape has been attached manufactured by the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present invention. FIG. 9 shows the wrinkles generated inside the corner of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after the resin tape is pasted, which is manufactured by the vacuum heat insulating material manufacturing method according to Embodiment 1 of the present invention. FIG.
The second vacuum heat insulating material 11 having the bent portion 11a produced as described above has heat insulating properties as shown in FIG. 8 from the outer surface 11b to the side surface 11c and the inner surface 11d of the bent portion 11a on both sides. A resin tape 13 is attached. In this way, after forming the bent portion 11a and the plurality of grooves 5a, when the resin tape 13 having heat insulation is applied, the resin tape 13 is apex of the peaks between the plurality of grooves 5a as shown in FIG. It becomes a shape that connects.

  The vacuum heat insulating material according to the present invention manufactured through the above steps has a heat-insulating resin tape 13 applied from the outer surface 11b to the side surface 11c and the inner surface 11d at both ends in the width direction of the rectangular bent portion 11a. Therefore, it is possible to effectively cover the point where the amount of heat transmitted through the outer packaging material surface layer is the largest, and to improve the overall heat insulating performance. Moreover, the part which the excess part of the outer packaging material 2 protrudes in a mountain shape can be protected with the resin tape 13, the bag breaking of the outer packaging material 2 can be prevented, and long-term reliability can be ensured.

  Moreover, since the vacuum heat insulating material which concerns on Embodiment 1 of this invention is 10 mm-25 mm in thickness, and the radius of the circular arc of the corner part inside a square bending part is 20 mm-40 mm, the wall which has a square corner part Can be easily applied to body insulation.

  And by applying the vacuum heat insulating material according to Embodiment 1 of the present invention thus created to a product such as a heat insulation box or equipment, the heat insulation effect of the product is improved, and the thickness of the product wall is reduced. The internal volume can be increased in a limited space of the product.

Embodiment 2. FIG.
FIG. 10 is a schematic diagram showing a bending step in the method for manufacturing a vacuum heat insulating material according to Embodiment 2 of the present invention. FIG. 11 shows a wrinkle portion generated inside the corner portion of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after the application of the resin tape manufactured by the method for manufacturing a vacuum heat insulating material according to Embodiment 2 of the present invention. FIG. In each figure, the same reference numerals are given to portions corresponding to those of the first embodiment.
In the manufacturing method of the vacuum heat insulating material according to the second embodiment of the present invention, the steps until the first vacuum heat insulating material 5 is created are described with reference to FIGS. 1 to 3 and FIG. Omitted because it is applicable. First, when the first vacuum heat insulating material 5 is completed, a resin tape 13 having heat insulating properties from the outer surface 11b to the side surface 11c and the inner surface 11d of at least the portions to be bent on both sides of the first vacuum heat insulating material 5 (FIG. 10). Paste. Next, the first vacuum heat insulating material 5 to which the heat insulating resin tape 13 is attached is bent using a jig 20 including a base plate 6, a bending jig 8, and a rotating plate 7 shown in FIG. 10. Processed. At this time, when the rotating plate 7 is rotated and then returned to its original position, the angle is slightly returned by the spring back, so that the initial target angle is set so as to be the target angle. By changing the target angle, the bending angle of the bent portion formed in the first vacuum heat insulating material 5 can be adjusted.

  In the bending process, first, a portion to be bent of the first vacuum heat insulating material 5 to which the resin tape 13 having heat insulation is attached from the outer surface 11b to the side surface 11c and the inner surface 11d of the portion to be bent, The plurality of protrusions 8b extending in the width direction at the front end are fixed by being sandwiched between one end surfaces of the bending jig 8. At this time, the tip of the bending jig 8 is directed to the portion of the first vacuum heat insulating material 5 to be bent, and a part of the projection 8b of the bending jig 8 is the first vacuum heat insulating material 5 and the resin tape. In order to bite into 13, the first vacuum heat insulating material 5 can be fixed. Further, the first vacuum heat insulating material 5 can be reliably fixed by the anti-slip 10 provided on the surface of the bending jig 8 facing the first vacuum heat insulating material 5.

  After the first vacuum heat insulating material 5 is fixed, the first vacuum heat insulating material 5 is bent while rotating the rotating plate 7 to a target angle. That is, the rotary plate 7 is returned to its original position after being folded back to the target angle so that the portion to be bent of the first vacuum heat insulating material 5 is pressed together with the resin tape 13 against the tip of the bending jig 8 by the rotary plate 7. The rotation center of the rotating plate 7 at this time is adjusted to coincide with the center of the arcuate surface 8a of the bending jig 8. In addition, although rubbing occurs due to friction between the outer packaging material 2 and the rotating plate 7, damage to the outer packaging material 2 can be suppressed by the rollers 9 provided on the rotating plate 7. When the rotating plate 7 is returned to the original position, the bent portion of the first vacuum heat insulating material 5 returns a little by springback, but the initial target angle is set so that the returned position becomes the target angle. ing. Thus, the first vacuum heat insulating material 5 and the resin tape 13 are simultaneously formed with a bent portion 11a and a plurality of grooves 5a extending in the width direction at the inner corner portion of the bent portion 11a. Thus, the second vacuum heat insulating material 11 having the bent portion 11a is completed.

  Thus, before forming the bent portion 11 a and the plurality of grooves 5 a in the first vacuum heat insulating material 5, the resin tape 13 having heat insulating properties is applied, and the first vacuum heat insulating material 5 together with the resin tape 13 is attached. 9 is bent, the resin tape 13 itself is bent in accordance with the groove 5a as shown in FIG.

  In the vacuum heat insulating material according to the second embodiment of the present invention manufactured through the above steps, the resin tape 13 having heat insulating properties from the outer surface 11b to the side surface 11c and the inner surface 11d at both ends in the width direction of the rectangular bent portion 11a is provided. Since it is affixed, the point with the largest amount of heat transmitted through the outer packaging material surface layer can be effectively covered, and the overall heat insulation performance can be enhanced. Moreover, the site | part from which the excess part of the outer packaging material 2 protrudes in a mountain shape can be protected with the resin tape 13, a broken bag can be prevented, and long-term reliability can be ensured.

  In addition, the specifications of the vacuum heat insulating material according to Embodiment 2 of the present invention are also 10 mm to 25 mm in thickness, and 20 mm to 40 mm in the radius of the arc of the corner portion inside the square bent portion. For this reason, it can apply easily to the heat insulating material of the wall which has a square corner part.

  And, by applying the vacuum heat insulating material according to Embodiment 2 of the present invention thus created to products such as heat insulation boxes and equipment, the heat insulation effect of the product is improved and the thickness of the product wall is reduced. The internal volume can be increased in a limited space of the product.

  In the first and second embodiments described above, the resin tape 13 is attached only to the portions to be bent on both sides of the first vacuum heat insulating material 5 or the second vacuum heat insulating material 11 as an example. However, the present invention is not limited to this, and the resin tape 13 may be attached to the entire length of both sides of the first vacuum heat insulating material 5 or the second vacuum heat insulating material 11. In this case, it is possible to reduce the risk of breaking the outer packaging material 2 when it comes into contact with other parts during assembly.

FIG. 12 shows a wrinkle portion generated inside the corner portion of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after bending according to the comparative example manufactured by the conventional manufacturing method. Sectional drawing of a corner part, (b) is a front view of the corner part of a bending part.
In the second vacuum heat insulating material 11A of this comparative example, as shown in FIGS. 12A and 12B, the wrinkle portion 12a generated inside the corner portion of the bent portion intersects (wrinkle intersection portion) 12b. In this wrinkle intersection 12b, the outer packaging material 2 was broken.

FIG. 13 is generated inside the corner portion of the bent portion of the vacuum heat insulating material (second vacuum heat insulating material) after the bending process manufactured by the vacuum heat insulating material manufacturing method according to the first and second embodiments of the present invention. (A) which shows a wrinkle part is sectional drawing of the corner part of a bending part, (b) is a front view of the corner part of a bending part.
The 2nd vacuum heat insulating material 11 manufactured with the manufacturing method of the vacuum heat insulating material which concerns on Embodiment 1 and Embodiment 2 of this invention is inside a corner part of a bending part like Fig.13 (a), (b). A straight wrinkle is formed in the generated wrinkle portion 12c, and a portion where the wrinkle portion 12c intersects is not seen.

  At the corner portion of the formed bent portion, there is no damage such as pinholes on the surface of the outer packaging material 2, and the bent portion is subjected to a smooth portion of the bent vacuum heat insulating material (second vacuum heat insulating material 11) and the bending processing. There was no difference in thermal conductivity with the smooth portion of the vacuum heat insulating material (first vacuum heat insulating material 5) that was not.

  That is, by controlling the formation of wrinkles on the outer packaging material 2 by the bending jig 8, there is no problem in bending the first vacuum heat insulating material 5, and grooving and bending are performed at the time of bending. By simultaneously implementing the above, productivity can be improved and cost can be reduced.

Embodiment 3. FIG.
FIG. 14 is a cross-sectional view of a heat insulation box (showing a refrigerator in this embodiment) according to Embodiment 3 of the present invention. In the drawing, parts corresponding to those of Embodiment 1 described above are denoted by the same reference numerals. It is.
The refrigerator 30 according to the third embodiment of the present invention is arranged between the outer box 31, the inner box 32 arranged inside the outer box 31, and the outer box 31 and the inner box 32 as shown in FIG. 14. The first vacuum heat insulating material 5, the second vacuum heat insulating material 11, a polyurethane foam (heat insulating material) 33, and a refrigeration unit (not shown) that supplies cold heat into the inner box 32 are provided. The outer box 31 and the inner box 32 each have an opening (not shown) formed on a common surface, and an opening / closing door (not shown) is provided in the opening.

  In the refrigerator, the range in which the heat insulating wall 34 is disposed is not limited, and may be the entire range or a part of the gap formed between the outer box 31 and the inner box 32. It may be arranged inside the door.

  In the refrigerator 30 configured as described above, since the first vacuum heat insulating material 5 and the second vacuum heat insulating material 11 of the present invention are embedded in the polyurethane foam 33 and used in combination, the heat insulating effect is increased and consumed. Energy saving effect is achieved by reducing electric power. When used, they are dismantled and recycled at local recycling centers based on the Home Appliance Recycling Law. At this time, when the core material of the vacuum heat insulating material of the refrigerator is an inorganic powder as in the conventional case, when the crushing process is performed, the powder is scattered, and the crushing process cannot be performed as it is in the box. It takes a lot of work to remove the vacuum insulation from the body. On the other hand, the refrigerator 30 according to the present invention includes the first vacuum heat insulating material 5 and the second vacuum heat insulating material 11 in which the core material 4 formed of the fiber assembly is disposed. The crushing process can be performed without removing the vacuum heat insulating material 5 and the second vacuum heat insulating material 11, and the recyclability is good.

Embodiment 4 FIG.
FIG. 15 is a longitudinal sectional view of an air conditioner according to Embodiment 4 of the present invention. In the drawing, portions corresponding to those of Embodiment 1 described above are denoted by the same reference numerals.
The air conditioner 40 according to Embodiment 4 of the present invention includes a centrifugal blower 42 at the center inside the casing 41 constituting the air conditioner body as shown in FIG. 15, and a heat exchanger 43 around the centrifugal blower 42. Is arranged. In addition, a second vacuum heat insulating material 11 that forms a blowing air passage between the casing 41 and the heat exchanger 43 is disposed on the inner wall surface of the casing 41. A decorative panel 44 is attached to the lower end of the casing. A suction port 45 is formed at the center of the decorative panel 44, and an air outlet 46 is formed at a side edge of the decorative panel 44.

  Also in the air conditioner 40 configured as described above, since the second vacuum heat insulating material 11 of the present invention is used, the heat insulating effect is improved, and an energy saving effect by reducing power consumption or the like is obtained. Moreover, since it has the 2nd vacuum heat insulating material 11 by which the core material formed with the fiber assembly was arrange | positioned, when recycling, it can perform a crushing process, without removing the 2nd vacuum heat insulating material 11, Recyclability is good.

  In addition, although the case where the heat insulation box is the refrigerator 30 and the other equipment is the air conditioner 40 is shown here, the present invention is not limited to these and can be applied to other equipment. Other devices of the present invention include vending machines, cold storages, heat storages, water heaters, domestic or commercial hot water supply devices (hot water heaters), domestic or commercial refrigeration and air conditioning devices, vehicle air conditioners, This includes equipment that can use vacuum insulation such as refrigerating equipment such as refueling equipment or thermal equipment, showcases, and jar pots. Furthermore, instead of a box having a predetermined shape, a heat insulating bag (heat insulating container) having a deformable outer bag and inner bag may be used. In these cases, the heat insulating box may be provided with temperature adjusting means to adjust the temperature inside the inner box. Furthermore, it can be applied to a house (such as a wall).

  DESCRIPTION OF SYMBOLS 1 Sheet-like fiber aggregate (inorganic fiber nonwoven fabric or organic fiber nonwoven fabric), 2 outer packaging material, 3 gas adsorbent, 4 core material, 5 1st vacuum heat insulating material (vacuum heat insulating material before a bending process), 5a groove | channel, 6 Base plate, 7 Rotating plate, 8 Bending jig, 8a Arc surface, 8b Protrusion, 9 Roller, 10 Non-slip, 11 Second vacuum heat insulating material (vacuum heat insulating material after bending), 11A Second vacuum heat insulating material Material (vacuum heat insulating material after bending of comparative example), 11a bent portion, 11b outer surface, 11c side surface, 11d inner surface, 12a wrinkle portion of comparative example, 12b wrinkle intersection portion, 12c wrinkle portion, 13 heat insulating resin tape , 20 jig, 30 refrigerator, 31 outer box, 32 inner box, 33 polyurethane foam, 34 heat insulation wall, 40 air conditioner, 41 casing, 42 centrifugal blower, 43 heat exchanger, 44粧 panel, 45 inlet, 46 outlet, A, B heat transfer path.

Claims (9)

  A vacuum heat insulating material in which a core material is encapsulated in a gas barrier outer packaging material, having a square bent portion, and a plurality of grooves extending at both ends in the width direction at corner portions inside the square bent portion. A vacuum heat insulating material that is formed and has a heat insulating resin tape affixed from the outer surface to the side surface and the inner surface of both end portions in the width direction in at least the rectangular bent portion.   The vacuum heat insulating material according to claim 1, wherein the thickness is 10 mm to 25 mm, and the radius of the arc of the corner portion inside the square bent portion is 20 mm to 40 mm.   The vacuum heat insulating material according to claim 1 or 2, wherein a laminated body of an inorganic fiber nonwoven fabric or an organic fiber nonwoven fabric is used as the core material.   It comprises an outer box and an inner box arranged inside the outer box, and the vacuum heat insulating material according to any one of claims 1 to 3 is arranged between the outer box and the inner box. Heat insulation box.   The apparatus using the vacuum heat insulating material in any one of Claims 1-3. A step of creating a flat plate-like first vacuum heat insulating material by enclosing the core material in a gas barrier outer packaging material and depressurizing the inside;
The portion to be bent of the first vacuum heat insulating material is fixed by being sandwiched between a base plate and one end surface of a bending jig provided with a plurality of protrusions extending in the width direction at the tip, A plurality of portions extending to both ends in the width direction at a bent portion and a corner portion on the inner side of the bent portion by folding the portion to be bent of one vacuum heat insulating material to a target angle so as to be pressed against the tip of the bending jig. Forming the groove of the strip at the same time, and creating a second vacuum heat insulating material with a bent portion;
A step of applying a heat insulating resin tape from the outer surface to the side surface and the inner surface of at least the bent portion on both sides of the second vacuum heat insulating material;
The manufacturing method of the vacuum heat insulating material characterized by having. A step of creating a flat plate-like first vacuum heat insulating material by enclosing the core material in a gas barrier outer packaging material and depressurizing the inside;
A step of applying a heat-insulating resin tape from the outer surface to the side surface and the inner surface of at least the portion to be bent on both sides of the first vacuum heat insulating material;
The portion to be bent of the first vacuum heat insulating material is fixed by being sandwiched between a base plate and one end surface of a bending jig provided with a plurality of protrusions extending in the width direction at the tip, By folding back the portion to be bent of the first vacuum heat insulating material to the target angle so as to be pressed against the tip of the bending jig together with the resin tape, the bending portion and the corner portion on the inner side of the bending portion are arranged in the width direction. Forming a plurality of grooves extending at both ends at the same time, and creating a second vacuum heat insulating material having a bent portion;
The manufacturing method of the vacuum heat insulating material characterized by having.   8. The vacuum heat insulating material according to claim 6, wherein the bending jig is provided with an anti-slip on the one end surface facing the base plate via the first vacuum heat insulating material. 9. Manufacturing method.   The method for producing a vacuum heat insulating material according to any one of claims 6 to 8, wherein the rotating plate includes a roller, and the roller rolls while pressing the first vacuum heat insulating material.

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