JP2001050479A - Vacuum heat insulating material and heat insulating panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the handling of sealing part of a vacuum heat insulating material and to provide performance for maintaining of vacuum state for long period and reliable heat insulating effects. SOLUTION: In this heat insulating panel, a recessed part 520 to accept a sealing part 530 is provided on the side of a core material 51 of a vacuum heat insulating material 50. The sealing part 530 is constructed not to stick out of the vacuum material 50. For the construction of the heat insulating panel, it is planned to make the handling of the sealing part 530 easy, not to cause vacuum destruction by damage, to maintain the vacuum state of the vacuum heat insulating material 50 for long period, and to form a panel with reliable heat insulating effects.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel using a vacuum heat insulating material for a refrigerator or the like.

[0002]

2. Description of the Related Art Conventionally, urethane foam materials and styrene foam materials have been mainly used as heat insulating materials for heat insulating walls of mobile storages requiring temperature control, such as freezing, refrigeration and cold storage vehicles. I have. A conventional wall structure in which a surface material and a heat insulating material are laminated has the following structure. Structure A: see FIG. 11 A panel structure in which a thin plate (surface material) 3 (or a thin plate made of FRP) made of an aluminum alloy is attached to both surfaces of the slab heat insulating material 5 with an adhesive 4.・ ・ See (a). A panel structure in which a heat insulating material 5 'made of a slab material is stacked and bonded 4 to form a heat insulating layer, and a surface material 3 is bonded 4 to both sides thereof. 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, arranged and arranged, and then pressed to bond the whole.

Structure B—See FIG. 12 A structure in which a urethane material for injection is injected into a panel as a surface material 3 using a thin plate formed integrally with FRP or FRP and plywood. The surface material 3 is set in the platen press via 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 from the injection nozzle 8 into the gap to form the urethane layer 5a. In this case, since the urethane has a self-adhesive property, no adhesive is required. Structure C: see FIG. 13 A structure in which a urethane material for spraying is sprayed and filled, and then an inner plate is attached to form an insulating box. A wooden material 9 having a heat insulating thickness is set inside the surface material 3 in which a prefabricated outer plate and a reinforcing material are laminated, and spraying urethane is sprayed in several layers by spraying means 81. If necessary, after shaving to a predetermined thickness, the surface material 3 on the other surface is attached by tapping 2 or an adhesive.

The structure of the heat insulating panel using urethane foam as the heat insulating material has been described above. The case where a vacuum heat insulating material is used as the heat insulating material will be described. 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 communication foam material or styrene communication foam material, and gas adsorbent 12 for preventing vacuum degree deterioration
Is placed in a bag of film 13 having no gas permeability or low gas permeability, sealed in a vacuum state, and
Make 0. At this time, when the core material 11 is packed in a film bag or when the core material 11 is hermetically sealed in a vacuum state, the film bag needs to have a sufficient dimension. After completion, the seal portion 15 including the extra dimension is exposed on the side surface of the vacuum heat insulating material.
Even if the margin is reduced, the margin L after completion and the length L of the seal portion will be 15 mm to 30 mm on one side.

When such a vacuum heat insulating material 10 is used as a heat insulating member in a panel structure, the following problems due to the sealing portion 15 including a margin dimension occur in each method. When a vacuum heat insulating material is used in place of the slab heat insulating material shown in the above structure A. When the vacuum heat insulating materials 10 are juxtaposed, they are sandwiched by small slab materials 16 so as not to damage the sealing portion 15 of the vacuum heat insulating materials 10. The structure becomes complicated, and the number of parts and components increase, and the structure becomes complicated. ... See FIG. 15. Since the seal portion 15 is not at a fixed position with respect to the thickness dimension of the vacuum heat insulating material 10, it must be forcibly inserted into the gap between the slab materials 16. For this reason, the stretched film 13 is broken 13 ', and this portion causes vacuum breakage. ... See FIG.

When a vacuum heat insulating material is used in the panel using the injection urethane shown in the structure B, 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, the injected urethane is difficult to fill the entire area, and a portion 17 ′ in which the density of the injected urethane is increased is formed. For example, at a normal density of 40 kg, the portion 17 ′ has a density of 50 kg. ... See FIG. 17 ・ Because the injection nozzle is inserted into a narrow place, there is a risk of contact with the film and damage. When a vacuum heat insulating material is used in the panel to which the urethane is sprayed as shown in the above structure C. In the spraying, urethane does not easily enter the lower portion of the seal portion 15 and a portion 18 not filled with the urethane is formed. ... See FIG.

[0007]

Therefore, in order to solve the above-mentioned problems, the present invention provides a concave portion for accommodating a seal portion on a side surface of a core material of a vacuum heat insulating material, wherein the seal portion is formed of a vacuum heat insulating material. An object of the present invention is to provide a panel which does not protrude to the outside, facilitates handling of a seal portion, maintains a vacuum state of a vacuum heat insulating material for a long period of time, and has a reliable heat insulating effect.

[0008]

The vacuum heat insulating material of the present invention comprises:
A concave groove is formed in a portion of the core material made of a heat insulating material corresponding to the seal portion of the synthetic resin film, and the seal portion at the film edge of the synthetic resin film is accommodated in the concave groove. I do. The concave groove is formed on the side surface in the thickness direction of the core material, and the seal portion does not protrude from the side surface of the vacuum heat insulating material. The heat insulating panel of the present invention in which the heat insulating material is sandwiched between surface materials uses a vacuum heat insulating material in which a seal portion is accommodated in a concave notch as a part of the heat insulating material. In addition, adjacent vacuum heat insulating materials are arranged side by side without any gap, or a structure in which the seal portion of the vacuum heat insulating material does not contact the adjacent heat insulating material.

The method for manufacturing a vacuum heat insulating material according to the present invention comprises a groove forming step of forming a concave groove in a core material, a synthetic resin film covering the core material, and a seal for sealing an edge of the synthetic resin film. And a depressurizing step of depressurizing the inside of the film in a depressurized environment. The seal portion formed in the seal forming step is accommodated in the concave groove of the core material in the depressurizing step. It has a configuration. A method of manufacturing a heat insulating panel in which a heat insulating material is sandwiched between surface materials according to the present invention includes a heat insulating material arranging step of arranging the heat insulating material on the surface material, and disposing the heat insulating material by arranging the surface material on the arranged heat insulating material. A clamping step of clamping by a surface material, wherein a part of the heat insulating material arranged in the heat insulating material arranging step uses a vacuum heat insulating material in which a seal portion is accommodated in a concave notch, and the adjacent vacuum heat insulating material is used. They have a configuration in which they are arranged side by side without any gap.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a cross-sectional view of a vacuum heat insulating material according to the present invention, and FIG. 2 is a configuration explanatory view. 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 vacuum. And a gas adsorbent 55 for adsorbing and fixing gas entering the vacuum insulation material 50.

The heat insulating core material 51 according to the present invention is, for example, a rectangular plate having upper and lower surfaces 510.511 and side surfaces 515 having a thickness h as shown in FIG. A concave groove 520 is formed in the side surface 515 at a substantially central portion of the entire circumference. The upper surface 510 of the heat insulating core member 51 thus configured is covered with a plastic film 531 having a larger area than the upper surface, and the lower surface 511 is covered with a plastic film 533 having a larger area than the lower surface. Edge
To The plastic films 531 and 533 have edge portions 531 a and 533 a on four rectangular sides of the upper and lower surfaces 510 and 511 of the heat insulating core material 51. The length e of the edge portions 531a and 533a is a length obtained by adding a length (1/2 · h) of the side surface 515 and a length obtained by adding a margin to the length of the seal 530. ing. After sealing the portions corresponding to the seal portions of the three side edges 531a and 533a of the plastic films 531 and 533 of such a size, the whole is housed in a vacuum chamber or the like to perform the deaeration process. And the other side is sealed with the internal pressure reduced.
To At this time, the side surface covering portions of the edge portions 531a and 533a cover the side surface 515, and the inside of the concave groove 520 is covered with a margin. And plastic films 531 and 533
The seal portion 530 is located in the concave groove 520 of the heat insulating core material 51 and is accommodated therein.

The heat insulating panel is constituted by the vacuum heat insulating material 50 thus configured. (1)... See FIG. 3 A slab material 5 is adhered to a thin plate (surface material) 60 made of an aluminum alloy with an adhesive 4, and a vacuum heat insulating material 50 arranged side by side is sandwiched.
The heat insulation panel 500 is configured. Since the heat insulating panel 500 does not have the seal portion 530 protruding from the side edge of the vacuum heat insulating material 50, the vacuum heat insulating material 50 can be disposed without any gap when the vacuum heat insulating materials 50 are juxtaposed. When a gap is formed between the adjacent vacuum heat insulating materials 50, the heat insulating panel 500 can be formed by interposing the slab material 5 having a size matching the gap in the gap. When the heat insulating panel 500 is configured in this manner, the seal portion 350 is formed by the adjacent slab material 5,
There is no contact with the vacuum heat insulating material 50, and there is no need to pay attention to its existence. Then, the slab material 5 is placed on the vacuum heat insulating material 50.
Can be formed simply by stacking, and since a conventional sealing portion is interposed, the bonding step of bonding the divided slab materials can be reduced, and a heat insulating panel having a simple and reliable heat insulating effect can be formed. it can. in this way,
The heat insulating panel 500 has no complicated structure, and can reduce the number of bonding steps as in the case of the slab material bricking method.

(2)... See FIG. 4 The vacuum heat insulating material 50 is arranged 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 does not protrude from the side surface of the vacuum heat insulating material 50, the injected urethane is not blocked, and the urethane is uniformly injected into the gap 90, and the heat insulating panel 510 having high heat insulating efficiency is obtained. Can be formed. In addition, since injection is performed only in a wide area around the end of the panel, injection into a narrow gap can be abolished, and it becomes possible to abut vacuum insulation materials or to insert and bond a slab material, thereby achieving high density. The risk of infused urethane or breaking the vacuum insulation film is also reduced.

(3)... See FIG. 5 The vacuum heat insulating material 50 is arranged on the surface material 60. Then, the surface material 60 is disposed via the girder material 65 for keeping the thickness constant, and the gap 95 is filled with urethane by spraying. At this time, the vacuum heat insulating material 50 may be provided with a gap between the beam member 65 and the vacuum heat insulating material 50 so that there is no gap.
In any case, since there is no seal portion in the gap 95 where the conventional vacuum heat insulating material protrudes from the edge, there is no portion that is not filled with urethane by spraying, and the heat insulating panel 520 has high heat insulating efficiency. Further, there is no place where the sprayed urethane does not enter even if a gap is made between the wooden girders and the wooden girders.

In the above embodiment, the plastic film for covering the core material of the vacuum heat insulating material is composed of two upper and lower sheets. In addition, one plastic film 54 is folded in two to cover the core material 51. Is also good. ...
Referring to FIG. 6, in this case, the vacuum heat insulating material 50A can be formed by sealing three sides of the side 54a, the side 54b, and the side 54c. The concave groove 521 for accommodating the seal portion formed in the core material 51 is provided on the side surface, the side 54a, the side 54b, and the side 5 of the core material 51.
Holes are punched in the surfaces corresponding to the three sides of 4c.

In addition, instead of the groove formed in the core material,
As shown in FIG. 7, a core material 51 having a V-shaped groove 522 is provided.
A is covered with a plastic film 53 to form a vacuum insulation material 5
0A. This V-shaped processing can be formed by cutter processing, and a similar effect can be achieved with simpler processing. Also,
As shown in FIG. 8, the vacuum heat insulating material 50B is formed by making the groove 525 formed in the core material 51B U-shaped. Also in this case, the seal portion 530 is accommodated in the U-shaped groove 522.

(Embodiment) Next, according to an embodiment, a panel using the vacuum heat insulating material according to the present invention and a heat insulating panel using the conventional vacuum heat insulating material are compared. FIG. 9 shows an embodiment using a vacuum heat insulating material according to the present invention, and FIG. 10 shows an embodiment of a heat insulating panel using a conventional vacuum heat insulating material. (1) An insulation panel using the vacuum insulation material 500 of the present invention. a. The aluminum plate is cut to form the surface material 70A. Further, the slab material 801 is cut to form a slab component 801 to be disposed in the gap. b. The slab component 801 is arranged on the periphery of the aluminum plate 70A. Then, adjacent vacuum heat insulating materials 500 are arranged in contact with each other in a range surrounded by the slab component 801. c. The aluminum plate 70A is placed on the vacuum heat insulating material 500, and the whole is adhesively fixed. By this step, the heat insulation panel 700
A is completed. This heat insulating panel requires a small number of bonding steps, and the ratio of the vacuum heat insulating material to the area of the heat insulating panel can be increased.

(2) Embodiment of a heat insulating panel using a conventional vacuum heat insulating material 10. a. An aluminum plate is cut to form a surface material 70B having the same area as the surface material 70A. Further, the slab material 80 is cut to form slab components 802 and 803 to be disposed in the gap. b. The slab component 802 is arranged on the periphery of the aluminum plate 70B. Further, a slab component 803 is arranged in a central portion surrounded by the slab component 802. This slab part 80
3 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 parts 802 and 803. At this time, the sealing part 1
5 is put on the slab part 803. d. Slab parts 802.80 on the second aluminum plate 70B
3 is adhered and fixed in the same manner as the first sheet. e. Slab parts 802.803 and vacuum insulation 10
Slab part 802.8 on the aluminum plate 70B
The aluminum plate 70B to which No. 03 is attached is placed, and the whole is adhesively fixed. At this time, the seal portion 15 of the vacuum heat insulating material 10 is held between the slab components 803. Through this step, the heat insulating panel 700B is completed.

Here, as compared with the manufacturing process shown in (1), the manufacturing process shown in (2) is c. Many steps d are required, and also in step e, handling of the seal portion 15 of the vacuum heat insulating material 10 becomes difficult. Further, the ratio of the vacuum heat insulating material provided in the panel to the entire area is smaller than that of the panel using the conventional vacuum heat insulating material (2), which requires a slab component for interposing a seal portion. Thus, the panel using the vacuum heat insulating material 50 of the present invention can have a higher ratio (approximately 10% improvement) by the area of the slab component having the seal portion interposed. Further, the manufacturing method according to (1), in which the number of slab component disposing steps and the number of bonding steps are small, can reduce the manufacturing time (about half).

[0020]

As described above, according to the present invention, the handling of the vacuum heat insulating material is facilitated, and the use area ratio of the vacuum heat insulating material can be increased. Furthermore, a long-term maintenance of a reliable insulation effect is achieved. Further, the structural handling of the heat insulating panel can be performed in the same manner as the slab material, and the handling and packing at the time of transportation can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vacuum heat insulating material according to the present invention.

FIG. 2 is a configuration explanatory view of a vacuum heat insulating material.

FIG. 3 is a sectional view of a heat insulating panel according to the present invention.

FIG. 4 is a cross-sectional view of the heat insulating panel according to the present invention.

FIG. 5 is a sectional view of a heat insulating panel according to the present invention.

FIG. 6 is a perspective view showing another embodiment of the heat insulating panel.

FIG. 7 is a sectional view showing another embodiment of the vacuum heat insulating material.

FIG. 8 is a sectional view showing another embodiment of the vacuum heat insulating material.

FIG. 9 is an explanatory view showing an embodiment of the heat insulating panel according to the present invention.

FIG. 10 is an explanatory view showing a conventional heat insulating panel.

FIG. 11 is a sectional view showing an example of a conventional heat insulating panel.

FIG. 12 is an explanatory view showing another embodiment of the conventional heat insulating panel.

FIG. 13 is an explanatory view showing another embodiment of a conventional heat insulating panel.

FIG. 14 is a sectional view of a conventional vacuum heat insulating material.

FIG. 15 is a sectional view showing another embodiment of the conventional heat insulating panel.

FIG. 16 is an explanatory view showing a defect state of a conventional heat insulating panel.

FIG. 17 is an explanatory view showing a defect state of a conventional heat insulating panel.

FIG. 18 is an explanatory view showing a defect state of a conventional heat insulating panel.

[Explanation of symbols]

 5 Slab material 50 Vacuum heat insulating material 51 Core material 53 Synthetic resin film 55 Gas adsorbent 60 Surface material 70 Beam material 500 Heat insulating panel 520 Depressed groove 530 Seal part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Souji Sato No. 8 Tsuchiya, Fujisawa-shi, Kanagawa Isuzu Motors Fujisawa Plant F-term (reference) 3H036 AA08 AB18 AB33 AC06

Claims (7)

[Claims] A vacuum heat insulating material in which a core material made of a heat insulating material is covered with a synthetic resin film to seal an edge of the film and the inside of the film is decompressed, wherein the core material is a synthetic resin film. A vacuum heat insulating material having a concave groove at a portion corresponding to the seal portion, wherein the seal portion of the synthetic resin film is housed in the concave groove; 2. The vacuum heat insulating material according to claim 1, wherein the concave groove is formed on a side surface in the thickness direction of the core material, and the seal portion does not protrude from the side surface of the vacuum heat insulating material. 3. A heat insulating panel in which a heat insulating material is sandwiched between surface materials, wherein a part of the heat insulating material is the vacuum heat insulating material according to claim 1. 4. The heat insulating panel according to claim 3, wherein adjacent vacuum heat insulating materials are arranged side by side without any gap. 5. The heat insulating panel according to claim 3, wherein the seal portion of the vacuum heat insulating material does not contact an adjacent heat insulating material. 6. A method of manufacturing a vacuum heat insulating material for covering a core material with a synthetic resin film and depressurizing the film in a decompressed environment, comprising: a groove forming step of forming a concave groove in the core material; It has a sealing step of covering the resin film and sealing the edge of the synthetic resin film, and a depressurizing step of depressurizing the inside of the film in a depressurized environment, wherein the seal is formed in the sealing step. The method for manufacturing a vacuum heat insulating material, wherein the vacuum chamber is accommodated in a concave groove of the core material in the pressure reducing step. 7. A method of manufacturing a heat insulating panel in which a heat insulating material is sandwiched between surface materials, wherein a heat insulating material is arranged on the surface material, and the surface material is arranged on the heat insulating material. And a clamping step of clamping the heat insulating material with the surface material. A part of the heat insulating material arranged in the heat insulating material arranging step has the vacuum heat insulating material according to claim 1 arranged therein, and the adjacent vacuum heat insulating materials have the same structure. A method for manufacturing thermal insulation panels that are juxtaposed without gaps.