JP2015215020A - Composite heat insulating material and manufacturing method of composite heat insulating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite heat insulating material including through-holes and having high heat insulation performance, and a manufacturing method of the composite heat insulating material.SOLUTION: A composite heat insulating material 22 comprises: a vacuum heat insulating material 26 that comprises a core material 32 including through-holes 36, a packing material 34 vacuum-packing the core material 32, and holes 39 formed in a state where the core material 32 is vacuum-packed; and a foamed heat insulating material 30 covering at least one surface of the vacuum heat insulating material 26 and surrounding areas of the holes 39.

Description

  The present invention relates to a composite heat insulating material and a method for manufacturing the composite heat insulating material.

  In recent years, a vacuum insulation material (VIP: Vacuum Insulation Panel) has been used as a heat insulation material for a heat insulation box surrounding a side wall of a refrigerator, a vending machine or the like, and the heat insulation performance has been improved. The vacuum heat insulating material has the same heat insulating performance with a thickness of about one tenth of that of urethane.

Patent Document 1 is a vacuum heat insulating material in which a core material 7 is vacuum-sealed inside a bag body formed of a packaging material 6. A through hole 21 is formed in the vacuum heat insulating material 20, and the through hole 21 and the core are formed. The structure which provided the core material cover 8 between the materials 7 is disclosed.
Further, in Patent Document 2, in a vacuum heat insulating material having a through-hole, a heat-welded portion 7 in which the outer cover materials 3 between the edge of the through-hole of the core material 2 and the hole of the outer cover material 3 are heat-welded. The structure which suppresses the gas permeation amount from a heat welding part by providing the thin part 8 in which the thickness of the heat welding layer pinched | interposed into the gas barrier layer partially became thin continuously is provided. To do.

JP 2013-200014 A JP 2011-208762 A

  Piping, wiring, etc. are mixed inside refrigerators, vending machines, etc. In order to use vacuum insulation for heat insulation of equipment storage parts and product storage parts such as refrigerators, vending machines, etc. In order to pass wiring or the like, it is necessary to open the hole diameter and the hole pitch with high accuracy.

  However, in the manufacturing process of the vacuum heat insulating material, it was difficult to accurately open the hole diameter and the hole pitch due to the influence of shrinkage during vacuum packaging. In addition, there is also a problem in the heat insulation around the hole, and further, there is a problem that the gas intrudes from the welded part around the hole and the heat insulation performance is lowered by operating the refrigerator or the vending machine for a long time. is there.

  These reductions in heat insulation performance increase energy consumption for maintaining the inside of a vending machine or the like at a constant temperature. In order to further save energy and reduce the size of a vending machine or the like, it is effective to increase the number of use parts of the vacuum heat insulating material that is thin and has high heat insulating performance.

  An object of this invention is to provide the manufacturing method of the composite heat insulating material which has a through-hole, and has high heat insulation performance, and a composite heat insulating material.

  One aspect of the present invention resides in a composite heat insulating material, and the composite heat insulating material is formed in a state where a core material having a through hole, a packaging material for vacuum packaging the core material, and the core material being vacuum packaged. A vacuum heat insulating material, and a foam heat insulating material covering at least one surface of the vacuum heat insulating material and the periphery of the hole.

  Suitably, the said hole is circular shape, circular arc shape, U shape, or a notch.

  Preferably, the other surface of the vacuum heat insulating material is covered with a protective member.

  Another aspect of the present invention resides in a method for manufacturing a composite heat insulating material, which includes a step of forming a through hole in a core material, a step of wrapping the core material with a packaging material and vacuum packaging it, A step of heat-welding the periphery of the packaging material including an opening other than the through-hole portion of the packaging material vacuum-packed, a step of heat-welding the through-hole portion, and the heat-welded through-hole portion. A step of forming a first hole, a step of covering at least one surface of the packaging material and the periphery of the first hole with a foam heat insulating material, and the first hole portion covered with the foam heat insulating material. Cutting to form a second hole.

  Preferably, the hole diameter of the second hole is smaller than that of the first hole, and the hole diameter of the first hole is smaller than that of the through hole.

  Preferably, the hole pitch of the first hole is smaller than the hole pitch of the through hole.

  Suitably, the said through-hole is formed in anticipation of shrinkage | contraction of the hole pitch and the hole diameter in the process of vacuum-packaging the said core material with a packaging material.

  ADVANTAGE OF THE INVENTION According to this invention, it has a through-hole and can provide the manufacturing method of a composite heat insulating material with a high heat insulation performance, and a composite heat insulating material.

It is a perspective view which shows the vending machine in which the composite heat insulating material which concerns on one Embodiment of this invention is used. It is a top view which shows the composite heat insulating material which concerns on one Embodiment of this invention. It is sectional drawing which shows the hole periphery of the composite heat insulating material which concerns on one Embodiment of this invention. It is a figure which shows the manufacturing method of the composite heat insulating material which concerns on one Embodiment of this invention. It is a top view which shows the composite heat insulating material which concerns on other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a vending machine 10 including a composite heat insulating material according to an embodiment of the present invention.

The vending machine 10 includes a housing 12, a front door 14 that opens and closes the front surface of the housing 12, and a middle door 16 provided inside the front door 14.
The inside of the housing 12 is divided into a product storage section 18 that stores products and a equipment storage section 20 that stores equipment such as a compressor.
The product storage unit 18 is covered at its upper surface and side surfaces with a heat insulating panel such as a vacuum heat insulating material (not shown).
The product storage unit 18 and the equipment storage unit 20 are partitioned by a composite heat insulation panel 22 as a composite heat insulating material.

  2 is a top view showing the composite heat insulation panel 22 according to one embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the periphery of the hole 24 of the composite heat insulation panel 22 in FIG.

  A plurality of holes 24 are formed in the composite heat insulation panel 22, and electric wiring, refrigerant gas piping, and the like are provided from the product storage portion 18 to the equipment storage portion 20 in the housing 12 through the holes 24.

  The composite heat insulating panel 22 includes a vacuum heat insulating material 26, a protective sheet 28 as a protective member adhered to one surface of the vacuum heat insulating material 26, the other surface of the vacuum heat insulating material 26, and a hole 39 described later. And a foam-type heat insulating material 30 covering the.

  The vacuum heat insulating material 26 includes a core material 32 and a gas barrier packaging material 34 that encloses the core material 32. A hole 39 is formed in the vacuum heat insulating material 26.

  The core material 32 is a fiber material, and for example, glass wool, glass paper, glass tissue or the like molded into a sheet shape is used. A through hole 36 is formed in the core member 32.

  As the packaging material 34, a bag-shaped laminate film made of, for example, a gas barrier is used.

  The protective sheet 28 is used to protect the vacuum heat insulating material 26, and for example, a PP (polypropylene) sheet having good weather resistance and antistatic properties is used.

  For example, urethane foam is used as the foam heat insulating material 30.

Hole diameter L ₁ of the hole 24 of the composite insulating panel 22 is smaller than the diameter L ₂ of the holes 39 of the vacuum heat insulating material 26, hole diameter L ₂ of the holes 39 is smaller than the diameter L ₃ of the through hole 36 of the core member 32 The hole 24, the hole 39, and the through hole 36 are formed substantially concentrically.

  Next, the manufacturing method of the composite heat insulation panel 22 which concerns on one Embodiment of this invention is demonstrated with reference to FIG.

First, the through hole 36 is opened in the well-dried core material 32 (see FIG. 4A). The hole diameter L ₃ of the through hole 36 is, for example, 105 mm. The hole pitch P _3-1 of the through holes 36 is 158 mm, for example, and the hole pitch P _3-2 is 597 mm, for example.

  Next, the core material 32 is accommodated in the packaging material 34, the inside of the packaging material 34 is evacuated from the opening of the bag, and the packaging materials 34 are thermally welded to form a peripheral seal portion 38A (see FIG. 4 (b)).

Next, the peripheral seal portion 38A of the packaging material 34 is folded, and the through-hole seal portion 38B in the through-hole 36 is thermally welded. The through hole seal part 38B on the inner peripheral side of the heat-welded through hole 36 is cut to form a hole 39, and the vacuum heat insulating material 26 having the hole 39 is formed (see FIG. 4C). The hole diameter L _{2 of the} hole 39 is, for example, 75 mm. The hole pitch P _2-1 of the holes 39 is, for example, 155 mm, and the hole pitch P _2-2 is, for example, 590.5 mm.

Here, the hole pitch P ₃ and the hole diameter L ₃ of the through holes 36 are contracted by about 1 to 2% by the vacuum evacuation in FIG.
That is, the hole pitch P ₃ and the hole diameter L ₃ of the through holes 36 are formed in anticipation of contraction due to evacuation.

  The protective sheet 28 is mounted in the frame body 40, and the vacuum heat insulating material 26 is mounted on the upper surface of the protective sheet 28. At this time, the protective sheet 28 and the vacuum heat insulating material 26 are bonded by an adhesive tape (not shown). An inlet 42 for injecting the foam heat insulating material 30 is provided on the side surface of the frame body 40 (see FIG. 4D).

When the vacuum heat insulating material 26 is attached to the frame body 40, the lid 44 is attached to the upper surface of the frame body 40, and the foam heat insulating material 30 is injected from the inlet 42.
Thereby, the foam-based heat insulating material 30 flows into the gaps in the frame 40 in the hole 39 between the vacuum heat insulating material 26 and the protective sheet 28, between the vacuum heat insulating material 26 and the lid 44, and on one surface and the hole of the vacuum heat insulating material 26. The interior 39 is filled with the foam heat insulating material 30 to form the composite heat insulating panel 22. Here, by using the foam-based heat insulating material 30, it is possible to prevent outside air from entering between the vacuum heat insulating material 26 (see FIG. 4E (cross-sectional view taken along the line AA in FIG. 4D)). ).

After elapse of a predetermined time (for example, after 15 minutes), when the foam heat insulating material 30 is solidified and cooled, the lid 44 is removed and the composite heat insulating panel 22 is taken out from the frame body 40. And the inner peripheral side of the hole 39 is cut | disconnected and the hole 24 is formed in the composite heat insulation panel 22 (refer FIG.4 (f)). The hole diameter L _{1 of the} hole 24 is 48 mm, for example. Hole pitch P _1-1 of holes 24 is, for example 155mm, hole pitch P _1-2 is, for example, 590.5Mm.

  Here, since the hole diameter and the hole pitch of the through holes 36 are formed in anticipation of the contraction due to the vacuum exhaust, the holes 24 are suitable for passing through the piping and wiring provided through the composite heat insulating panel 22. Has a pore size. Moreover, the hole pitch of the hole 24 is arrange | positioned in the position suitable for letting the piping and wiring which were penetrated and provided in the composite heat insulation panel 22 to pass. That is, a hole with high dimensional accuracy is formed. Further, since one surface of the vacuum heat insulating material 26 and the periphery of the hole 39 are covered with the foam heat insulating material 30, the peripheral seal portion 38A and the through hole seal portion 38B are protected, and the peripheral seal portion 38A and the through hole seal portion 38B. Gas is prevented from entering into the vacuum heat insulating material 26, and the heat insulating performance is maintained. Moreover, since the thin through-hole seal part 38B is also covered with the foam heat insulating material 30, the heat insulating performance is maintained. Further, since one surface of the vacuum heat insulating material 26 is covered with the protective sheet 28 and the other surface is covered with the foam heat insulating material 30, there is no fear of damaging the surface of the packaging material.

  In addition, in this embodiment, although the structure which covered one surface of the vacuum heat insulating material 26 with the foam type heat insulating material 30 was demonstrated, not only this but the whole surface of the vacuum heat insulating material 26 is covered with the foam type heat insulating material 30. Also good.

FIG. 5 is a top view showing a composite heat insulation panel 50 according to another embodiment.
The composite heat insulation panel 50 shown in FIG. 5 includes a circular hole 24, an arc-shaped hole 52, a U-shaped hole 54, and a notch 56.
Not only the circular hole 24 but also a core material having an arc-shaped hole, a U-shaped hole, or a notch, even if the arc-shaped hole 52, the U-shaped hole 54, the notch 56 or the like is formed. Can be used to form a vacuum heat insulating material having arc-shaped holes, U-shaped holes, holes such as cutouts, and the like by the same method as the composite heat insulating panel 22 according to the above-described embodiment. Further, a composite heat insulating material in which one surface of the vacuum heat insulating material and the periphery of the arc-shaped hole, the U-shaped hole, the notch and the like are covered with the foam heat insulating material 30 can be formed.

  In other words, energy saving and downsizing of the device are achieved by using a composite heat insulation panel using a vacuum heat insulating material in a part where the influence of exhaust heat that partitions the product storage part and the equipment storage part inside the vending machine is large. Can do.

  In addition, by forming at least one surface of the vacuum heat insulating material and the periphery of the hole with a foam heat insulating material, the intrusion of gas from the periphery of the hole is suppressed even in a portion where piping, wiring, etc. are mixed. Insulation performance can be improved. Moreover, the heat insulation performance of the thin part around the hole can be maintained. Further, when piping or wiring is passed through the hole, there is no fear of damaging the surface of the packaging material, and the heat insulation performance can be maintained by maintaining a vacuum state.

  INDUSTRIAL APPLICABILITY The present invention can be used for a heat insulating box body that requires high heat insulating properties such as a showcase freezer, a building material outer wall, and Ecocute (registered trademark), as well as a refrigerator and a vending machine.

10 Vending Machine 18 Product Storage Unit 20 Equipment Storage Unit 22 Composite Insulation Panel 24 Hole (Second Hole)
26 Vacuum heat insulating material 28 Protective sheet 30 Foamed heat insulating material 32 Core material 34 Packaging material 36 Through hole 38A Peripheral seal portion 38B Through hole seal portion 39 Hole (first hole)

Claims (7)

A vacuum heat insulating material comprising: a core material having a through hole; a packaging material for vacuum packaging the core material; and a hole formed in a state where the core material is vacuum packaged;
A composite heat insulating material having at least one surface of the vacuum heat insulating material and a foam heat insulating material covering the periphery of the hole.   The composite heat insulating material according to claim 1, wherein the hole has a circular shape, an arc shape, a U shape, or a notch.   The other surface of the said vacuum heat insulating material is a composite heat insulating material of Claim 1 or 2 covered with a protection member. Forming a through hole in the core material;
Wrapping the core material with a packaging material and vacuum packaging;
Heat-sealing the periphery of the packaging material including an opening other than the through-hole portion of the packaging material vacuum-packaged;
Heat-welding the through-hole portion;
Forming a first hole in the heat-welded through-hole portion;
Covering at least one surface of the packaging material and the periphery of the first hole with a foam heat insulating material;
Cutting the first hole portion covered with the foam heat insulating material to form a second hole;
The manufacturing method of the composite heat insulating material which has this.   The method of manufacturing a composite heat insulating material according to claim 4, wherein the second hole has a smaller hole diameter than the first hole, and the first hole has a smaller hole diameter than the through hole.   The method for manufacturing a composite heat insulating material according to claim 4 or 5, wherein a hole pitch of the first holes is smaller than a hole pitch of the through holes.   The said through-hole is a manufacturing method of the composite heat insulating material in any one of the Claims 4 thru | or 6 formed in anticipation of shrinkage | contraction of the hole pitch and hole diameter in the process of vacuum-packaging the said core material with a packaging material.

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