JP5527073B2 - Vacuum insulation - Google Patents

Description

  The present invention relates to a vacuum heat insulating material (VIP: Vacuum Insulation Panel).

  Conventionally, a vacuum heat insulating material (VIP) is formed by covering a core material with a jacket material and reducing the pressure inside thereof, and has a fin portion formed only of the jacket material at an outer edge portion. Such a covering material is composed of a film in which a plurality of functional layers are laminated, and more specifically, for example, polyethylene that is heat-welded during bag making for sealing the core material. For example, an aluminum foil gas barrier layer for suppressing gas permeation from the outside, a protective layer made of, for example, polyamide for protecting the gas barrier layer, and an external protection made of, for example, polyethylene terephthalate for protecting from an external impact. It is comprised from the film of the 4 layer structure in which the layer was laminated | stacked one by one (for example, refer patent document 1).

JP 2004-36749 A

  However, in the vacuum heat insulating material described above, the film constituting the covering material has a four-layer structure, and the outer protective layer which is the outermost layer is made of polyethylene terephthalate or the like, and therefore has the following problems. It was. That is, if the core material is encapsulated with such a covering material and the inside thereof is decompressed, a bent portion is formed in the covering material, and the material for forming the external protective layer (polyethylene terephthalate, etc.) is bent by this bending. A stab occurs, resulting in a pinhole. If such a pinhole is generated, the gas will be allowed to enter, and the heat insulation performance will be reduced.

  An object of this invention is to provide the vacuum heat insulating material which can suppress generation | occurrence | production of a pinhole and can prevent the fall of heat insulation performance in view of the said situation.

  In order to achieve the above object, a vacuum heat insulating material according to claim 1 of the present invention includes a flat core material, a weld layer for heat welding in a manner of sealing the core material, and gas permeation from the outside. A gas barrier layer for suppressing gas, a protective layer for protecting the gas barrier layer, and an outer cover material made of a film having a four-layer structure in which an external protective layer for protecting against external impacts is sequentially laminated, In a vacuum heat insulating material that is formed by encapsulating with a jacket material and depressurizing the inside thereof, and having a fin portion composed only of the jacket material on an outer edge portion, the jacket material is at least by the pressure reduction The film structure of the bent portion is a three-layer structure in which the welding layer, the gas barrier layer, and the protective layer are sequentially laminated.

  According to a second aspect of the present invention, there is provided the vacuum heat insulating material according to the first aspect, wherein the outer cover material has a film configuration of the fin portion, and the welding layer, the gas barrier layer, and the protective layer are sequentially laminated. It is characterized by having a three-layer structure.

  According to the vacuum heat insulating material of the present invention, in the outer cover material, the film structure at least bent by reduced pressure has a three-layer structure in which a welding layer, a gas barrier layer, and a protective layer are sequentially laminated. The material (polyethylene terephthalate or the like) does not break and puncture occurs, and as a result, generation of pinholes can be prevented. Therefore, it is possible to suppress the occurrence of pinholes and prevent a decrease in heat insulation performance.

FIG. 1 is a sectional view showing a case where an internal structure of a vending machine to which a vacuum heat insulating material according to an embodiment of the present invention is applied is viewed from the front. 2 is a cross-sectional side view showing the internal structure of the vending machine shown in FIG. FIG. 3 is an explanatory view showing the heat insulating partition plate shown in FIG. 1. FIG. 4 shows the vacuum heat insulating material shown in FIG. 3, in which (a) is a side view, (b) is a front view, and (c) is a plan view. FIG. 5 shows a state in which the fin portion of the vacuum heat insulating material shown in FIG. 4 is folded, in which (a) is a side view, (b) is a front view, and (c) is a plan view. FIG. 6 is an enlarged cross-sectional front view showing the main part of the heat insulation partition plate shown in FIG. 3 and showing the lower end portion of the heat insulation partition plate as viewed from the front. FIG. 7 is an explanatory diagram illustrating an example of a procedure for creating the vacuum heat insulating material illustrated in FIG. 3. FIG. 8 is an explanatory view for explaining the film structure of the jacket material in the vacuum heat insulating material according to the embodiment of the present invention. FIG. 9 is an enlarged cross-sectional front view showing a main part of a modification of the heat insulation partition plate shown in FIG. 6 and showing the lower end portion of the heat insulation partition plate as viewed from the front. FIG. 10 is an enlarged cross-sectional front view showing a main part of a modification of the heat insulating partition plate shown in FIG. 6 and showing the lower end portion of the heat insulating partition plate as viewed from the front. FIG. 11 is an explanatory view for explaining the film structure of the jacket material in the modified example of the vacuum heat insulating material according to the embodiment of the present invention.

  Exemplary embodiments of a vacuum heat insulating material according to the present invention will be described below in detail with reference to the accompanying drawings.

  1 and 2 each show a vending machine to which a vacuum heat insulating material according to an embodiment of the present invention is applied. FIG. 1 shows a case where the internal structure of the vending machine is viewed from the front. FIG. 2 is a cross-sectional side view showing the internal structure of the vending machine. The vending machine illustrated here includes a main body cabinet 1.

  The main body cabinet 1 is a vending machine main body having a rectangular shape with an open front surface. In the main body cabinet 1, a product storage chamber 3 is defined in such a manner as to be surrounded by panel-like heat insulating members 2a to 2d laid on the top, bottom, back, and both sides. And the inside of this goods storage chamber 3 is provided in the aspect with which the three independent goods storage 5 partitioned off by the two heat insulation partition plates 4, for example was located in the right and left. This product storage 5 is for storing products such as canned beverages and beverages containing plastic bottles in a state maintained at a desired temperature, and has a heat insulating structure.

  As shown in FIG. 2, an outer door 6 and an inner door 7 are provided on the front surface of the main body cabinet 1. The outer door 6 is for opening and closing the front opening of the main body cabinet 1, and the inner door 7 is for opening and closing the front surface of the commodity storage 5. The inner door 7 is divided into upper and lower parts, and the upper door 7a opens and closes when a product is replenished.

  The product storage 5 is provided with a product storage rack 8, a carry-out mechanism 9, and a carry-out shooter 10. The commodity storage rack 8 is for storing commodities in a manner arranged in the vertical direction. The carry-out mechanism 9 is provided at the lower part of the product storage rack 8 and is used to carry out the products at the bottom of the product group stored in the product storage rack 8 one by one. The carry-out shooter 10 is for guiding the product carried out from the carry-out mechanism 9 to a product outlet 6 a provided in the outer door 6.

  An evaporator 24 and a heater H are disposed below the carry-out shooter 10. The evaporator 24 is disposed on the front side of the rear duct D, and is sequentially connected to the compressor 21, the condenser 22, the capillary tube 23 and the refrigerant pipe 25 disposed in the machine room 11 to form the refrigeration cycle 20. doing. The compressor 21 sucks the refrigerant through the suction port, compresses the sucked refrigerant to be in a high-temperature and high-pressure state (high-temperature and high-pressure refrigerant), and discharges it from the discharge port. The condenser 22 condenses the refrigerant that passes therethrough. More specifically, the refrigerant compressed by the compressor 21 and discharged from the discharge port and sent out through the refrigerant pipe 25 is condensed by exchanging heat with ambient air. The capillary tube 23 is used for adiabatic expansion by depressurizing the refrigerant passing therethrough.

  By circulating the refrigerant in the refrigeration cycle 20, the refrigerant compressed by the compressor 21 is condensed by the condenser 22 and then adiabatically expanded by the capillary tube 23 and passes through the evaporator 24. When the refrigerant passes through the evaporator 24, heat is exchanged with the internal air of the commodity storage 5 in which the evaporator 24 is disposed, and the refrigerant evaporates to cool the internal air. The evaporated refrigerant is sucked into the compressor 21.

  The cooled internal air moves inside the product storage 5 by driving the internal blower fan F, whereby the product stored in the product storage rack 8 of the product storage 5 is at a desired temperature (for example, 5 ° C.). It will be cooled down.

  The heater H is disposed on the front side of the evaporator 24. The heater H heats the surrounding air when energized. The air heated by the heater H moves inside the product storage 5 by driving the internal blower fan F, so that the product stored in the product storage rack 8 of the product storage 5 has a desired temperature (for example, 55 ° C.).

  FIG. 3 is an explanatory view showing the heat insulating partition plate 4 shown in FIG. The heat insulating partition plate 4 exemplified here is composed of a vacuum heat insulating material (VIP) 41 and a frame body 42. In addition, in this Embodiment, although the heat insulation partition plate 4 is demonstrated as an application example of the vacuum heat insulating material 41, in this invention, it is not restricted only to this heat insulation partition plate 4, The panel which defines the goods storage chamber 3 The heat insulating members 2a to 2d may also be configured by the vacuum heat insulating material 41. In this case, only a length dimension, a width dimension, etc. differ from the heat insulation partition plate 4, and the basic composition is the same.

  As shown in FIG. 4, the vacuum heat insulating material 41 is a rectangular shape in which a core material 411 made of a material having low thermal conductivity such as glass fiber is encapsulated with an outer covering material 412 made of a film, for example, and deaerated and sealed. belongs to. In the vacuum heat insulating material 41, due to the characteristics of the manufacturing process, a long side fin portion 412a extending along the long side of the core material 411 and a short side fin portion 412b extending along the short side of the core material 411 are formed on the outer edge. And are formed. And as shown in FIG. 5, the long side fin part 412a and the short piece side fin part are folded in order on the core material coating | coated part 412c, and a fin part (long side fin part is referred to) by the adhesive tape 43 (refer FIG. 6). 412a and the short side fin portion 412b) are bonded to the core material covering portion 412c.

  The frame body 42 is formed of a hard heat insulating resin material and is configured to cover the edge of the vacuum heat insulating material 41 and includes a frame member. Here, the frame member covers the front frame portion 42a that covers the front edge portion of the vacuum heat insulating material 41, the upper frame portion 42b that covers the upper edge portion, the lower frame portion 42c that covers the lower edge portion, and the rear edge portion. And a rear frame portion 42d.

  FIG. 6 is an enlarged cross-sectional front view showing the main part of the heat insulating partition plate 4 shown in FIG. 3 and showing the lower end portion of the heat insulating partition plate 4 from the front. In FIG. 6, the lower frame portion 42 c is advanced from the front into the guide rail 31 disposed on the upper surface of the rigid foam 30 such as urethane on the floor surface where the heat insulating partition plate 4 is disposed. It is set up. A cushion material (not shown) is attached to the upper frame portion 42b and the rear frame portion 42d of the frame body 42 constituting the heat insulating partition plate 4, and a gasket material is attached to the front frame portion 42a.

  The vacuum heat insulating material 41 which comprises such a heat insulation partition plate 4 is formed as follows. As shown in FIG. 7, a rectangular film is overlapped and three sides are heat-welded, and only one side is opened to form a jacket material (bag making). A flat core material 411 is introduced from the opened one side, and a part of the one side is also thermally welded, and the internal air is extracted from this part to reduce the pressure, whereby a vacuum heat insulating material 41 is formed. The

  By the way, the jacket material 412 constituting the vacuum heat insulating material 41 is formed of a film in which a plurality of functional layers are laminated, and as shown in FIG. 8, a flat portion in contact with the front surface and the back surface of the core material 411. 4121, a fin forming portion 4122 that forms a fin portion of the outer edge portion, and a bent portion 4123 that is located between the flat portion 4121 and the fin forming portion 4122 and is bent by reducing the inside when the vacuum heat insulating material 41 is formed. And have.

  In such an outer cover material 412, the film of the flat part 4121 has mainly a four-layer structure, and in order from the side close to the core material 411, the welding layer 51, the gas barrier layer 52, the protective layer 53, and the outside The protective layer 54 is laminated.

  The welding layer 51 is formed from, for example, a resin material such as polyethylene, and is used for heat welding during the above-described bag making. The gas barrier layer 52 is formed of, for example, aluminum foil or the like, and is for suppressing gas permeation from the outside.

  The protective layer 53 is formed from, for example, a resin material such as polyamide, and is for protecting the gas barrier layer 52. The external protective layer 54 is formed from a resin material such as polyethylene terephthalate, for example, and protects the protective layer 53 and the like from external impacts.

  Further, in such a covering material 412, the film at the outer portion from the portion close to the bent portion 4123 in the flat portion 4121 to the fin forming portion 4122 through the bent portion 4123 has a three-layer structure. ing. More specifically, the film in the outer portion is formed by laminating the welding layer 51, the gas barrier layer 52, and the protective layer 53 in order from the side close to the core material 411. That is, the external protective layer 54 is omitted as compared with the four-layer structure of the film of the flat portion 4121.

  As described above, according to the vacuum heat insulating material 41 according to the present embodiment, the outer cover material 412 reaches the fin forming portion 4122 through the bent portion 4123 from the portion of the flat portion 4121 that is close to the bent portion 4123. The film of the outer portion is formed by forming the external protective layer 54 (polyethylene terephthalate or the like) by omitting the external protective layer 54 as a three-layer structure of the welding layer 51, the gas barrier layer 52 and the protective layer 53 in order from the core material 411 side. ) Does not break and puncture occurs, and as a result, pinholes can be prevented from occurring. Therefore, generation | occurrence | production of a pinhole can be suppressed and the fall of heat insulation performance can be prevented.

  Moreover, in the said vacuum heat insulating material 41, since the film of the fin formation part 4122 is also made into the 3 layer structure which excluded the external protective layer 54, as shown in FIG.5 and FIG.6, as shown in FIG.5 and FIG.6, a fin part (long side side fin part) 412a and the short side fin portion 412b) are not folded and the formation material of the outer protective layer 54 (polyethylene terephthalate or the like) is not broken, and as a result, pinholes are prevented. be able to. Therefore, generation | occurrence | production of a pinhole can be suppressed and the fall of heat insulation performance can be prevented.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made.

  In the above-described embodiment, the film of the outer portion from the portion of the flat portion 4121 that is close to the bent portion 4123 to the fin forming portion 4122 in the outer cover material 412 has a three-layer structure. Although the vacuum heat insulating material 41 is described, in the present invention, the outer cover material 412 constituting the vacuum heat insulating material 41 has at least a film configuration that is bent due to reduced pressure, the welded layer 51, the gas barrier layer 52, and the protective layer. A three-layer structure in which the layers 53 are sequentially stacked may be used. That is, at least the film of the bent portion 4123 only needs to have a three-layer structure, and the film of the fin forming portion 4122 does not need to have a three-layer structure.

  Moreover, in embodiment mentioned above, although the vacuum heat insulating material 41 which folded and comprised the fin part on the core material coating | coated part 412c was demonstrated, the vacuum heat insulating material 41 of this invention is as shown in FIG.9 and FIG.10. The fin portion (long side fin portion 412a and short side fin portion 412b) may be extended. In this case, the lower frame portion 42c only needs to have a groove portion 42c1 that allows the fin portion to enter in an extended state, and the left and right portions of the groove portion 42c1 are continuous as shown in FIG. It may be formed or may be formed by dividing the left and right portions of the groove as shown in FIG.

  And in the case of the vacuum heat insulating material 41 in the state where the fin portion is extended in this way, the film of the fin forming portion 4122 may be a four-layer structure provided with the external protective layer 54 instead of the three-layer structure.

  Further, in the above-described embodiment, the bent portion 4123 is formed in the outer cover material 412 on the front surface side (left surface side) and the back surface side (right surface side) of the core material 411. In the present invention, FIG. As shown in FIG. 4, a vacuum heat insulating material 41 ′ in which the bent portion 4123 is formed only in the outer cover material 412 on the right surface side may be used. In the case of the vacuum heat insulating material 41 ′ having such a configuration, the film of the outer cover material 412 on the left surface side may have a four-layer structure, and the film of the outer cover material 412 on the right surface side is formed on the bent portion 4123 of the flat portion 4121. The film from the adjacent part to the bent part 4123 may have a three-layer structure.

  As described above, the vacuum heat insulating material according to the present invention is useful for vending machines that sell products such as canned drinks and plastic bottled drinks.

1 Main body cabinet 2a-2d Thermal insulation member
3 product storage room
4 Insulation partition
5 product storage
6 Outside door
7 Inner door
8 Product storage rack
DESCRIPTION OF SYMBOLS 9 Unloading mechanism 10 Unloading shooter 11 Machine room 20 Refrigeration cycle 21 Compressor 22 Condenser 23 Capillary tube 24 Evaporator 25 Refrigerant piping 41 Vacuum heat insulating material (VIP)
411 Core material 412 Cover material 412a Long side fin portion 412b Short side fin portion 412c Core material covering portion 4121 Flat portion 4122 Fin forming portion 4123 Bending portion 42 Frame 51 Welding layer 52 Gas barrier layer 53 Protective layer 54 External protection layer
D Rear duct
F Inside fan
H heater

Claims (2)

A flat core material;
A welding layer for thermally welding the core material in a sealed manner, a gas barrier layer that suppresses the permeation of gas from the outside, a protective layer that protects the gas barrier layer, and an external protective layer that protects from external impacts are sequentially stacked A jacket material made of a film having a four-layer structure,
In the vacuum heat insulating material which is formed by encapsulating the core material with the outer covering material and depressurizing the inside thereof, and has a fin portion composed only of the outer covering material at an outer edge portion,
The vacuum jacket is characterized in that the outer cover material has a three-layer structure in which the film configuration of at least the portion bent by the reduced pressure is formed by sequentially laminating the welding layer, the gas barrier layer and the protective layer.   2. The vacuum heat insulating material according to claim 1, wherein the cover material has a three-layer structure in which the fin portion has a film configuration in which the welding layer, the gas barrier layer, and the protective layer are sequentially laminated.

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