JP3750481B2 - Vacuum insulation and insulation panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum heat insulating material and a heat insulating panel using the vacuum heat insulating material.
[0002]
[Prior art]
Conventionally, in a heat insulating wall of a moving storage that requires temperature control, such as a refrigerator, a refrigerator, a cold car, and the like, a urethane foam material and a styrene foam material are mainly used as the heat insulating material on the wall surface.
A conventional wall structure in which a surface material and a heat insulating material are laminated has the following structure.
Structure A: Refer to FIG. 10 A panel structure in which a thin plate (surface material) 3 made of aluminum alloy (or a thin plate made of FRP) is attached to both side surfaces of the slab heat insulating material 5 with an adhesive 4. (A) A panel structure in which a heat insulating material 5 'made of a reference slab material is stacked, bonded 4 to form a heat insulating layer, and a surface material 3 is bonded 4 on both sides thereof. (B) Reference In this forming method, the adhesive 4 is applied to the surface material 3 or the heat insulating materials 5 and 5 'made of a foam material, and then placed, and then pressed to bond the whole.
[0003]
Structure B: see FIG. 11 A structure in which an injection urethane material is injected into a panel by using FRP or a thin plate integrally formed of FRP and plywood as a surface material 3.
The surface material 3 is set in the surface plate press through the slab material 6 for setting the interval, and then the frame material 7 having a finished dimension thickness is set around the panel. Urethane is injected into the gap from the injection nozzle 8 to form the urethane layer 5a. In this case, since urethane has self-adhesive properties, no adhesive is required.
Structure C: Refer to FIG. 12 A structure in which a urethane material for spraying is sprayed and filled, and then an inner plate is attached to form a heat insulating box.
A girder 9 having a heat insulation thickness is set inside a surface material 3 in which a prefabricated outer plate and a reinforcing material are laminated, and spraying urethane is sprayed into several layers by a spraying means 81.
If necessary, the surface material 3 on the other surface is attached by tapping 2 or an adhesive after shaving to a predetermined thickness.
[0004]
As mentioned above, although the structure of the heat insulation panel which used the urethane foam as a heat insulating material was demonstrated, the case where a vacuum heat insulating material is used as a heat insulating material is demonstrated.
First, the structure of the vacuum heat insulating material 10 will be described with reference to FIG.
Plastic communication material (core material) 11 such as urethane continuous foam material and styrene continuous foam material and gas adsorbent 12 for preventing deterioration of vacuum degree, a bag of a film 13 having no gas permeability or low gas permeability And sealed in a vacuum state to produce the vacuum heat insulating material 10.
At this time, when the core material 11 is packaged in the film or when hermetically sealing is performed in a vacuum state, a margin for the film bag is required. The seal part 15 including the margin dimension is exposed on the side surface of the vacuum heat insulating material after completion.
Even if the margin is reduced, the margin dimension after completion + the length L of the seal portion is 15 mm to 30 mm on one side.
[0005]
When such a vacuum heat insulating material 10 is used for a panel structure as a heat insulating member, the following problems caused by the seal portion 15 including a margin dimension occur in each method.
(1) When a vacuum heat insulating material is used instead of the slab heat insulating material shown in the above structure A. When installing the vacuum heat insulating material 10 in parallel, a small slab material 16 is used so as not to damage the seal portion 15 of the vacuum heat insulating material 10. The structure becomes squeezed, and the number of layers and parts increase, resulting in a complicated structure. ... See FIG. 14-Since the seal portion 15 is not a fixed position with respect to the thickness of the vacuum heat insulating material 10, it must be forced into the stack gap of the slab material 16. For this reason, the pulled film 13 is broken 13 ', and this portion causes a vacuum break. ... See FIG. 15 [0006]
(2) In the case of using a vacuum heat insulating material in the panel using the injected urethane shown in the structure B above, a gap 17 is provided between the adjacent vacuum heat insulating materials 10 for the seal portion 15, and the gap 17 is injected. Fill with urethane foam. In this case, since the gap 17 is small, it is difficult to fill the entire area with the injected urethane, and a portion 17 ′ where the density of the injected urethane becomes high can be formed. For example, when the density is usually 40 kg, the portion 17 ′ has a density of 50 kg. ... See Fig. 16-Since the injection nozzle is inserted in a narrow area, there is a risk of contact with and damage to the film.
{Circle around (3)} In the panel for spraying urethane shown in the above structure C, when a vacuum heat insulating material is used, it is difficult for urethane to enter the lower portion of the seal portion 15 during spraying, and a portion 18 not filled with urethane is formed. ... See FIG. 17
[Problems to be solved by the invention]
In view of the above problems, in the vacuum heat insulating material constituting the heat insulating panel, the applicant of the present invention has a configuration in which a concave groove is formed in the core material and the sealing portion of the synthetic resin film is accommodated in the concave groove. -225922.
The processing of the core material and the groove will be described with reference to FIGS.
The core material 30 of the vacuum heat insulating material has a housing recess groove 31 formed on the side wall surface. In forming the groove 31, the groove was processed by a special cutting tool called the router 20. The router 20 is formed by rotatably attaching a cutting blade 23 to a member 21, contacting the cutting surface of the core material 30 via a guide 25, and cutting a groove 31 having a desired depth.
In the above forming method, the time required for grooving the core material of about 1 m square plate was about 5 minutes. In addition, the cutting powder generated during the cutting process is scattered around the work space, causing contamination. Therefore, in order to discharge the cutting powder to the outdoors, it is essential to install a large exhaust device and to wear a dust mask so that the operator does not inhale the dust.
As described above, special equipment is required for forming the groove, and the manufacturing apparatus for the core material is large.
Therefore, in order to solve the above-mentioned problems, the present invention enables the vacuum heat insulating material constituting the heat insulating panel to be maintained in a vacuum state for a long period of time, and does not require cutting in the production of the core material of the vacuum heat insulating material. The purpose is to form a seal accommodation space, achieve miniaturization of the apparatus, and save labor in the manufacturing process.
[0008]
[Means for Solving the Problems]
The vacuum heat insulating material of the present invention has a configuration in which a concave portion is formed in a portion corresponding to the sealing portion of the synthetic resin film of the core material made of the heat insulating material, and the sealing portion of the film edge of the synthetic resin film is accommodated in the concave portion. To do. The core material is formed by laminating a plurality of plate-like heat insulating materials, but when the size of the plate-like heat insulating material located in the center part of the lamination direction is smaller than the size of the other plate-like heat insulating materials and laminated, A recess having a difference in size of the plate-like heat insulating material is formed at the edge of the central portion of the core material in the stacking direction.
The heat insulating panel in which the heat insulating material of the present invention is sandwiched between the surface materials uses the vacuum heat insulating material in which the seal portion is accommodated in the concave portion as a part of the heat insulating material, and the adjacent vacuum heat insulating materials are arranged side by side without any gap. It has a configuration.
[0009]
The manufacturing method of the vacuum heat insulating material of the present invention includes a core material forming step of laminating a plurality of plate-shaped heat insulating materials to form a core material, a sealing step of sealing a synthetic resin film edge, and a synthetic resin on the core material The plate-like heat insulating material that has a coating step for covering the film and a pressure reducing step for reducing the pressure in the film in a reduced pressure environment, and is laminated in the core material forming step is a small plate shape compared to other plate-like heat insulating materials Including a heat insulating material, the small plate-shaped heat insulating material is positioned at the central portion in the stacking direction, and a recess is formed at the edge of the core portion in the stacking direction. The structure accommodated in is comprised.
The manufacturing method of the heat insulation panel which pinched | interposed the heat insulating material of this invention with the surface material is a heat insulating material arrangement | positioning process which arrange | positions a heat insulating material on a surface material, arrange | positions a surface material on the arrange | positioned heat insulating material, and heat insulating material. A part of the heat insulating material arranged in the heat insulating material arranging step uses a vacuum heat insulating material in which the seal portion is accommodated in the recess, and there is no gap between the adjacent vacuum heat insulating materials. It has the structure arranged in parallel.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a vacuum heat insulating material according to the present invention, and FIG.
The vacuum heat insulating material 50 includes a heat insulating core material 51 made of a plastic communication foam material such as a urethane communication foam material or a styrene communication foam material, a plastic film 53 covering the heat insulation core material 51, and a reduced pressure. The gas adsorbent 55 is configured to adsorb and fix the gas entering the vacuum heat insulating material 50.
[0011]
The heat insulating core material 51 according to the present invention is configured by laminating a first core material 51A, a second core material 51B, and a third core material 51C, which are rectangular plates, for example, as shown in FIG. Has been.
The first core material 51A and the second core material 51B are rectangular plates having the same size. The third core material 51 </ b> C is a rectangular plate having dimensions that are shorter than the first and second core materials 51 </ b> A and 51 </ b> B by the size of each side.
The heat insulating core material 51 is configured by sandwiching the third core material 51C between the first core material 51A and the second core material 51B.
In the laminated heat insulating core material 51, a concave portion 520 having a dimensional difference between the first and second core materials 51A and 51B and the third core material 51C and a depth dimension m is formed perpendicular to the lamination direction.
The laminated core material 51 is covered with a plastic film.
[0012]
The plastic film to be coated is a bag 53 in which a seal portion 530 is formed by sealing three sides in advance. And the core material 51 laminated | stacked from the opening part 535 of the plastic bag 53 is inserted, it is made a vacuum state in a vacuum chamber, the opening part 535 is sealed, and the vacuum heat insulating material 50 is formed. ... See FIG. 3 At this time, if the core materials are simply overlapped, the third core material 51C moves between the first core material 51A and the second core material 51B, and FIG. As shown in a), the peripheral gap between the first and second core materials 51A, 51B and the third core material 51C is such that the gap s> the gap t, or as shown in (b). As a result, the first core material 51A is displaced, and the first core material 51A protrudes from the second core material 51B by the dimension u.
[0013]
Therefore, the core material 51 according to the present invention is positioned (temporarily fixed) by the following method, and the first, second, and third core materials 51A, B, and C are laminated.
(1) The center position O of the 2nd core material 51B and the 3rd core material 51C is made to correspond, and the pin 510 is stopped. Then, the first core material 51A is stopped on the third core material 51C with a pin 510 and polymerized. (Refer to FIG. 4C) (2) Temporary bonding is performed by interposing a double-sided adhesive tape 511 in place of the pin. (Refer to FIG. 4D.) (3) The adhesive 512 is applied instead of the pins, and point adhesion is performed. ... See FIG. 4 (e).
As described above, the core material 51 laminated in a state where movement between the core materials is temporarily stopped and the movement is restricted is covered with the plastic film.
The core material 51 is accommodated in a plastic film bag 53, the whole is accommodated in a vacuum chamber or the like, degassed, and the remaining one side is sealed in a state where the inside is decompressed. At this time, the plastic film bag body 53 is configured to be approximately equal to or slightly larger than the surface of the core material 51, so that the seal portion 530 is covered in a state of being drawn into the recess 520 of the core material 51. .
[0015]
A heat insulating panel is configured by the vacuum heat insulating material 50 configured as described above.
(1) ... See FIG. 5 A slab material 5 described in the conventional example is attached to a thin plate (surface material) 60 made of an aluminum alloy with an adhesive 4, and a vacuum heat insulating material 50 arranged in parallel is sandwiched between the heat insulating panels. 500.
In this heat insulating panel 500, since the seal part 530 of the vacuum heat insulating material 50 is accommodated in the recess 520 of the core material 51, when the vacuum heat insulating material 50 is arranged side by side, the vacuum heat insulating material 50 can be disposed without a gap. When a gap is formed between adjacent vacuum heat insulating materials 50, the heat insulating panel 500 can be formed by interposing a slab material 5 having a size matching the gap in the gap.
[0016]
Thus, when comprising the heat insulation panel 500, since the sealing part 530 of the vacuum heat insulating material 50 is accommodated in the recessed part, it is not necessary to pay attention to the presence of the adjacent slab material 5 and the vacuum heat insulating material 50. And it can be formed by simply stacking the slab material 5 on the vacuum heat insulating material 50, and since the conventional seal portion is interposed, it is possible to reduce the bonding process for bonding the divided slab material, more easily and reliably. A heat insulating panel having a heat insulating effect can be formed.
As described above, the heat insulating panel 500 has no complicated structure, and can reduce the number of bonding steps in the same manner as the brick slab method.
[0017]
(2)... Refer to FIG. 6 The vacuum heat insulating material 50 is disposed on the surface material 60 with a gap 90 therebetween. Then, urethane is injected into the gap 90.
Also in this case, since the sealing portion of the vacuum heat insulating material 50 is accommodated in the recess, the injected urethane is not shielded, and the urethane is uniformly injected into the gap 90, so that the heat insulating panel 510 with high heat insulating efficiency can be formed. . In addition, it will be injected only into a wide area around the edge of the panel, and injection into narrow gaps can be abolished, making it possible to abut against vacuum insulation materials or insert and bond slab materials, etc. Reduces the risk of creating dense parts and breaking the vacuum insulation film.
[0018]
(3) ... The vacuum heat insulating material 50 is arrange | positioned on the surface material 60 with reference to FIG. And the surface material 60 is arrange | positioned through the girder material 65 for making thickness constant, and urethane is filled in the gap | interval 95 by spraying. At this time, the vacuum heat insulating material 50 may be disposed so that there is no gap even if a gap is provided between the vacuum heat insulating material 50 and the beam member 65. In either case, since the seal part which the conventional vacuum heat insulating material protruded to the edge is accommodated in the recess in the gap 95, there is no part not filled with urethane by spraying, and the heat insulation panel 515 with high heat insulation efficiency is obtained. . In addition, there is no place where urethane does not enter even if a gap is made between the wooden girder and the wooden girder is in close contact.
[0019]
In the said embodiment, although the core material showed the example formed with three plate-shaped heat insulating materials, the plate-shaped heat insulating material which comprises a core material may be three or more sheets. At this time, by setting the plate-like heat insulating material positioned at the central portion in the stacking direction to a size (small size) smaller than other plate-like heat insulating materials, the concave portion can be formed on the periphery of the core material in the stacking step.
[0020]
(Example)
Next, the panel using the vacuum heat insulating material according to the present invention is compared with the heat insulating panel using the conventional vacuum heat insulating material according to an example.
FIG. 8 shows an embodiment using a vacuum heat insulating material according to the present invention, and FIG. 9 shows an embodiment of a heat insulating panel using a conventional vacuum heat insulating material.
(1) The heat insulation panel by the vacuum heat insulating material 50 of this invention.
a. The aluminum plate is cut to form the surface material 70A. Further, a slab part 801 is formed by cutting the slab material 80 and disposing it in the gap.
b. A slab component 801 is disposed on the periphery of the aluminum plate 70A. Then, adjacent vacuum heat insulating materials 50 are placed in contact with each other in a range surrounded by the slab component 801.
c. An aluminum plate 70A is placed on the vacuum heat insulating material 50, and the whole is bonded and fixed.
Through this process, the heat insulating panel 700A is completed.
This heat insulating panel requires a small number of bonding steps, and the proportion of the vacuum heat insulating material in the area of the heat insulating panel can be increased.
[0021]
(2) An example of a heat insulating panel using the conventional vacuum heat insulating material 10.
a. The aluminum plate is cut to form a surface material 70B having the same area as the surface material 70A. Further, slab parts 802 and 803 are formed by cutting the slab material 80 and disposing it in the gap.
b. A slab component 802 is disposed on the periphery of the aluminum plate 70B.
Further, the slab part 803 is arranged in the central portion surrounded by the slab part 802. The slab component 803 is a component on which the seal portion 15 of the vacuum heat insulating material 10 is placed.
c. The vacuum heat insulating material 10 is disposed in a portion surrounded by the slab component 802 and the slab component 803. At this time, the seal portion 15 is placed on the slab component 803.
d. The slab part 802.803 is bonded and fixed to the second aluminum plate 70B in the same manner as the first sheet.
e. The aluminum plate 70B on which the slab component 802.803 is attached is placed on the slab component 802.803 and the aluminum plate 70B on which the vacuum heat insulating material 10 is placed, and the whole is bonded and fixed. At this time, the seal portion 15 of the vacuum heat insulating material 10 is held between the slab parts 803.
Through this process, the heat insulating panel 700B is completed.
[0022]
Here, compared with the manufacturing process by the vacuum heat insulating material which concerns on this invention shown to (1), the manufacturing process by the conventional vacuum heat insulating material shown to (2) is c. Many processes of d are required, and also in the process of e, handling of the seal part 15 of the vacuum heat insulating material 10 becomes difficult.
Moreover, the ratio which occupies for the whole area of the vacuum heat insulating material arrange | positioned in a panel is a panel which uses the conventional vacuum heat insulating material 10 of (2) which requires the slab part which interposes a seal part, The panel using the vacuum heat insulating material 50 of the present invention can have a higher ratio (about 10% improvement) by the area of the slab part interposing the seal portion.
Moreover, the manufacturing method by the vacuum heat insulating material which concerns on this invention of (1) description with few slab component arrangement | positioning processes and an adhesion | attachment process can shorten manufacturing time (about half).
[0023]
【The invention's effect】
As described above, according to the present invention, the vacuum heat insulating material can be easily handled, and the usage area ratio of the vacuum heat insulating material can be increased.
In addition, reliable long-term maintenance of the insulation effect is achieved. Moreover, the structural handling as a heat insulation panel can be performed in the same way as a slab material, and the handling and packing at the time of transportation can be saved.
Moreover, since the core material of the vacuum heat insulating material is formed by laminating plate-shaped core materials, dust is not generated by cutting, and a small manufacturing apparatus that does not require equipment such as an exhaust device can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a vacuum heat insulating material according to the present invention.
FIG. 2 is a diagram illustrating the configuration of a core material.
FIG. 3 is a diagram illustrating the configuration of a vacuum heat insulating material.
FIG. 4 is an explanatory diagram of a laminated state of core materials.
FIG. 5 is a cross-sectional view of a heat insulating panel according to the present invention.
FIG. 6 is a cross-sectional view showing another example of a heat insulating panel.
FIG. 7 is a perspective view showing another embodiment of the heat insulation panel.
FIG. 8 is an explanatory view showing an embodiment of a heat insulating panel according to the present invention.
FIG. 9 is an explanatory view showing a conventional heat insulation panel.
FIG. 10 is a cross-sectional view showing an example of a conventional heat insulation panel.
FIG. 11 is an explanatory view showing another embodiment of a conventional heat insulation panel.
FIG. 12 is an explanatory view showing another embodiment of a conventional heat insulation panel.
FIG. 13 is a cross-sectional view of a conventional vacuum heat insulating material.
FIG. 14 is a cross-sectional view showing another embodiment of a conventional heat insulation panel.
FIG. 15 is an explanatory view showing a defect state of a conventional heat insulation panel.
FIG. 16 is an explanatory view showing a defect state of a conventional heat insulation panel.
FIG. 17 is an explanatory view showing a defect state of a conventional heat insulation panel.
FIG. 18 is a perspective view showing a core material of a conventional vacuum heat insulating material.
FIG. 19 is an explanatory view showing a groove forming state of a core material of a conventional vacuum heat insulating material.
[Explanation of symbols]
5 Slab Material 50 Vacuum Heat Insulating Material 51 Core Material 51A First Core Material 51B Second Core Material 51C Third Core Material 53 Synthetic Resin Film Bag 55 Gas Adsorbent 60 Surface Material 70 Girder Material 500 Thermal Insulation Panel 520 Recess 530 seal part

Claims (6)

In the vacuum heat insulating material formed by covering the core material made of a heat insulating material with a synthetic resin film and decompressing the inside of the film,
The core material is configured by laminating a plurality of plate-like heat insulating materials, and the plate-like heat insulating material located at the central portion in the stacking direction is made smaller than other plate-shaped heat insulating materials, and a recess is formed at the central edge of the stacking direction. Vacuum heat insulating material formed by forming In the vacuum heat insulating material formed by covering the core material made of a heat insulating material with a synthetic resin film and sealing the film edge, and reducing the pressure in the film,
The core material is configured by laminating a plurality of plate-shaped heat insulating materials, and the plate-shaped heat insulating material located in the central portion in the stacking direction is smaller than the other plate-shaped heat insulating materials, forming a recess in the central portion in the stacking direction, A vacuum insulating material in which the sealing portion of the synthetic resin film is accommodated in the recess of the core material. A heat insulation panel with a heat insulating material sandwiched between surface materials,
A part of said heat insulating material is the heat insulation panel which is a vacuum heat insulating material of Claim 1 or 2.   The heat insulation panel according to claim 3, wherein the adjacent vacuum heat insulating materials are arranged side by side without a gap. In the method for manufacturing a vacuum heat insulating material, in which the core material is covered with a synthetic resin film and the inside of the film is depressurized in a reduced pressure environment.
A core material forming step for forming a core material by matching the center positions of a plurality of plate-like heat insulating materials;
A sealing step for sealing the edge of the synthetic resin film;
A coating step of coating the core material with a synthetic resin film;
A decompression step of decompressing the inside of the film in a decompression environment,
The plate-like heat insulating material to be laminated in the core material forming step is smaller than the other plate-like heat insulating materials in the central part in the stacking direction, and a recess is formed at the edge of the central part in the stacking direction. And the sealing part of the synthetic resin film which coat | covers a core material in this pressure reduction process is accommodated in the recessed part of a core material, The manufacturing method of the vacuum heat insulating material characterized by the above-mentioned. A method for producing a heat insulating panel in which a heat insulating material is sandwiched between surface materials,
A heat insulating material arranging step of arranging a heat insulating material on the surface material;
A sandwiching step of placing the surface material on the placed heat insulating material and sandwiching the heat insulating material with the surface material;
A part of the heat insulating material disposed in the heat insulating material disposing step disposes the vacuum heat insulating material according to claim 1 or 2, and the adjacent vacuum heat insulating materials are arranged side by side without a gap.

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