JP2002221295A - Vacuum insulation and insulation panels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating panel which facilitates handling of a vacuum heat insulating material, maintains a vacuum state of the vacuum heat insulating material for a long time, and includes a vacuum heat insulating material which is easy to handle. It is. SOLUTION: A core member 51 provided with a concave groove 520 of the present invention.
Is covered with a synthetic resin film 53 to seal the edges of the film.
And depressurize the inside of the film to seal the synthetic resin film.
The vacuum heat insulating material 50 </ b> A in which the core portion 530 is accommodated in the concave groove 520 of the core material is provided in the concave groove 520 in which the seal portion 530 is accommodated.
Has a configuration in which the temporary fixing member 110 is provided in a part of the. The temporary fixing member 110 is disposed on a seal wrinkle portion 530C formed at least at a portion where the seal portions intersect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating member including a vacuum heat insulating material used as a wall member for a refrigerator, a refrigerator car and the like.

[0002]

2. Description of the Related Art Conventionally, in a heat insulating wall of a mobile storage, such as a frozen, refrigerated or insulated car, which requires temperature control, a slab heat insulating material such as urethane foam material or styrene foam material is mainly provided on the wall surface. A material is used, and a surface material is laminated on a heat insulating material.

Further, a vacuum heat insulating material has been developed as a heat insulating material having good heat insulating efficiency, and is used for wall structures such as refrigerators. First, the structure of the vacuum heat insulating material will be described with reference to FIG.
A plastic communication material (core material) 11 such as a urethane communication foam material or a styrene communication foam material and a gas adsorbent 12 for preventing the degree of vacuum deterioration are combined with a bag of a film 13 having no gas permeability or low gas permeability. , And sealed in a vacuum state to produce a vacuum heat insulating material 10. At this time, the core material 11
Is packed in a film bag and the film bag needs an extra dimension in the operation of hermetically sealing in a vacuum state.
After completion, the seal portion 15 including the extra dimension is exposed on the side surface of the vacuum heat insulating material. Even if you make the margin less,
The length L of the seal portion plus the margin after completion is 30 mm from 15 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 caused by the sealing portion 15 including a margin dimension occur. When a vacuum heat insulating material is used instead of the slab heat insulating material: When the vacuum heat insulating materials 10 are juxtaposed, the vacuum heat insulating material 10 is sandwiched by small slab materials 16 so as not to damage the sealing portion 15. However, the number of parts increases and the structure becomes complicated. ... See FIG. 17. Since the seal portion 15 is not at a fixed position with respect to the thickness dimension of the vacuum heat insulating material 10, the seal portion 15 must be forcibly inserted into the lamination gap of the slab material 16. For this reason, the stretched film 13 is broken 13 ', and this portion causes vacuum breakage. ... See FIG.

[0005] A panel in which urethane is injected into a gap between the vacuum heat insulating materials 10 provided adjacent to each other. A gap 17 is provided between the adjacent vacuum heat insulating materials 10 for the sealing portion 15 and the gap 17 is filled 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. ... Refer to Fig. 19-Since the injection nozzle is inserted into a narrow place, there is a risk of contact with the film and breaking. When urethane is blown into the gap of the vacuum heat insulating material 10 to form a panel with the frame plate 9 interposed in order to make the thickness of the panel constant, urethane enters the lower part of the seal portion 15 in the spraying. It is difficult to form a portion 18 that is not filled with urethane. ... See FIG.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a heat insulating panel that facilitates handling of a vacuum heat insulating material, maintains a vacuum state of the vacuum heat insulating material for a long period of time, and includes a vacuum heat insulating material that is easy to handle. Is what you do.

[0007]

The core material provided with the concave groove of the present invention is covered with a synthetic resin film to seal the film edge.
And depressurize the inside of the film to seal the synthetic resin film.
The vacuum heat insulating material having the core portion accommodated in the concave groove of the core material has a configuration in which a temporary fixing member for pressing and temporarily fixing a seal portion formed at a corner portion to a part of the concave groove accommodating the seal portion is provided.
The temporary fixing member is disposed on a seal wrinkle formed at least at a portion where the seals intersect.

Further, the vacuum heat insulating material has a structure in which the rising direction of the seal wrinkle portion is regulated, and the temporary fixing member is disposed so as to press and fix at least the regulated seal wrinkle portion. Further, the temporary fixing member has a configuration in a tape shape having an adhesive. In addition, the temporary fixing member is configured to be a cover member that also serves as a cushioning material that accommodates at least the seal wrinkle.

In the heat insulating panel of the present invention, a part of the heat insulating material sandwiched between the surface materials is covered with a synthetic resin film on a core material provided with a concave groove, and the film edge is sealed, and the inside of the film is sealed. The pressure is reduced so that the seal portion of the synthetic resin film is accommodated in the concave groove of the core material, and at least the seal wrinkles formed at the corners where the seal portions intersect are made of a vacuum heat insulating material pressed and fixed to the temporary fixing member. Make up.

[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 is a core material 51 made of a plastic communication foam material such as a urethane communication foam material or a styrene communication foam material.
And a plastic film 5 covering the heat insulating core material 51.
3 and a gas adsorbent 55 that adsorbs and fixes the gas entering the decompressed vacuum heat insulating material 50.

The core member 51 according to the present invention is, for example, as shown in FIG. 2, a rectangular plate having upper and lower surfaces 510, 511 and side surfaces 515 having a predetermined thickness h. 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 material 51 thus configured is covered with a plastic film 531 having a larger area than the upper surface area, the lower surface 511 is covered with a plastic film 533 having a larger area than the lower surface area, and ends of the upper and lower plastic films 531 and 533 are provided. Seal the edges.

The plastic films 531 and 533 are substantially rectangular upper and lower surfaces 510 and 511 of the heat insulating core material 51.
Edges 531a and 533a are provided on the sides. The length e of the edge portions 531a and 533a is a length obtained by adding a margin to the half length (1/2 · h) of the side surface 515 and the length of the seal 530. The three edges 5 of the plastic films 531 and 533 having such a size.
After the portion corresponding to the seal portion 31a, 533a is first sealed, the whole is housed in a vacuum chamber or the like, subjected to a deaeration treatment, and the other side is sealed while the inside is depressurized. 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. Then, the seal portions 530 of the plastic films 531 and 533 are located and housed in the concave grooves 520 of the heat insulating core member 51.

At this time, the seal portion 530 includes a seal portion formed on two parallel sides, for example, a vertical seal portion 530A.
A seal wrinkle 530 is formed at a corner where the horizontal seal 530B intersects.
C is formed. ... see FIG. 3 This seal wrinkle 53
0C has considerable rigidity because at least two polymerized synthetic resin films shrink and form wrinkles, and therefore, it projects outward without being able to be completely accommodated in the concave groove 520. And this seal wrinkle part 530C is the vacuum heat insulating material 5
There is a risk that the film 53 of the other vacuum heat insulating material 50 that is in contact with it may be broken during handling of the zero.

FIG. 4 illustrates a case where a vacuum heat insulating material 50 projecting a seal wrinkle portion 530C at a corner portion is formed side by side to form a panel. Adjacent vacuum insulation 5
No. 0 needs to be disposed with a gap 90 so that the seal wrinkle portion 530C protruding from the corner does not contact. Then, a slab material must be placed in this gap or urethane must be injected to form a heat insulating structure. Therefore, according to the present invention, the seal wrinkle portion 530C is temporarily fixed along the concave groove 520, thereby preventing the seal wrinkle portion from affecting adjacent members.

An embodiment will be described below with reference to the drawings. Example 1 See FIG. 5 In the vacuum heat insulating material shown in this example, the groove into which the seal portion 530 is inserted is covered with a tape-like temporary fixing material. The temporary fixing material 110 shown in the drawing is a member in which an adhesive 110B for both bonding and buffering is provided on both surfaces of a tape material 110A having a width dimension capable of covering at least the concave groove portion. For example,
As shown in the drawing, when seal wrinkles 530C protrude from the four corners of vacuum heat insulating material 50A, temporary fixing material 110 is attached to the entire circumference of the groove. At this time, the seal wrinkles 530 are pressed by the temporary fixing material 110 and fall in the concave groove direction,
Fixed below. The entire surface of the vacuum heat insulating member 50A in which the sealing wrinkles 530C protruding are pressed by the tape-shaped temporary fixing material 110 becomes a flat surface, which facilitates handling, and the temporary fixing material 110 is provided on both surfaces. Since the adhesive is provided, the laying process becomes easy. In addition, the temporary fixing material may have a configuration in which an adhesive is stuck on only one required surface. As a tape material, a buffering effect can be improved by attaching a slab material such as a sponge tape or a urethane foam material in addition to a paper material and a plastic film.

The case where the heat insulating panel 500 is formed by using the vacuum heat insulating material 50A will be described. ... See FIG. 6 A vacuum heat insulating material 50A is juxtaposed, frame plates 60, 80, etc. are arranged at the ends, and the upper and lower surfaces of the vacuum heat insulating material are sandwiched by surface materials to constitute a heat insulating panel 500. At this time, the vacuum heat insulating material 50A has no protruding portion on the entire circumference, and can be disposed without a gap between the adjacent vacuum heat insulating material 50A, and the packing efficiency is improved.
Moreover, since the exposed surface of the temporary fixing material 110 is made of the adhesive 110B, the workability of laying is improved. Although the example in which the temporary fixing material is arranged on the entire circumference of the vacuum heat insulating material has been described above, as shown in FIG. 7, the temporary fixing material 11 is provided only in the portion where the seal wrinkle is formed.
By arranging 0, the same effect can be obtained.

Embodiment 2 This vacuum heat insulating material controls the forming direction (projection direction) of the seal wrinkle 530C so that it is easy to handle as a fixed direction. In this embodiment, the forming direction of the seal wrinkle is changed by changing the depth of the concave groove of the core material. ... See FIGS. 8 to 10 The vacuum heat insulating material 50B has a structure in which a core material 51A is covered with an upper film and a lower film. At this time, the core material 51
A is a concave / vertical groove 520A and a horizontal groove 520B formed on the side surface.
And the depth is different. For example, the depth dimension F2 in the center direction of the horizontal groove 520B is larger than the depth dimension F1 in the center direction of the vertical groove 520A, and a relationship of F1 <F2 is established.
The core material 51A having this configuration is covered with a film.
The three sides are sealed, the core material 51A is housed therein, and the core material 51A is subjected to deaeration in a vacuum chamber. At this time, the seal wrinkles 530C formed at the four corners of the vacuum heat insulating material 50B are formed upright in the horizontal groove 520B which is an extension of the vertical groove 520A.

This phenomenon is caused by the fact that when the groove width w is the same for both the vertical groove and the horizontal groove, the inner circumferential length of the vertical groove 520A having a shallow groove depth is (2F1 + w), and the horizontal groove 520B having a deep groove depth. Is (2F2 + w). Then, as compared with the covering area where the film edge covers the vertical groove 520A having the short inner circumferential length of the groove, the covering area where the film edge covers the vertical groove 520B having the long inner circumferential length of the groove is large. It is presumed that the film covering the lateral groove 520B having a large covering area pulls the edge including the seal portion 530A formed in the vertical groove having a small covering area. In the vacuum heat insulating material 50B thus configured, the seal wrinkles 530C protrude (erect) in one direction. For example, in this case, the seals 530C protrude in a lateral groove having a large covering area, and protrude in an extension direction of the longitudinal groove 520A. I have.

In addition, as a method of controlling the rising direction of the seal wrinkle, the vertical grooves and the horizontal grooves of the core material have different cross-sectional shapes. In this way, the inner circumferential length of the groove is changed by the shape change, and the seal wrinkles are erected in the groove direction having the longer inner circumferential length. In addition, there is a method in which a reinforcing member such as a reinforcing tape or a clip is provided at the edge of the seal portion in the direction in which the user wants to be erected, and the erection direction is controlled.

In the vacuum heat insulating material 50B configured as described above, as described in the first embodiment, the seal wrinkles 53
A temporary fixing member is attached to the protruding portion of 0C. In this case, FIG.
As shown in FIG. 1, by disposing the temporary fixing members 110 on the two sides of the lateral groove 520B where the seal wrinkling portions 530C stand, the seal wrinkling portions 530C are covered and temporarily fixed by the temporary fixing members 110.

In the vacuum heat insulating material 50B in which the rising direction of the seal wrinkle portion 530C is regulated, the cover member 120 that covers the seal wrinkle portion is provided so that the vacuum heat insulating material 50B can be connected to another vacuum heat insulating material by the seal wrinkle portion. And the stress applied to the vacuum heat insulating material can be reduced by using the cover member as a cushioning material.・ ・
-See FIGS. 12 and 13 The cover member 120 has a size that can accommodate at least the seal wrinkle portion 530C. When the seal member 530C is covered with the cover member 120, the vacuum heat insulating material 50
B has a shape in which the cover member 120 is connected in the lateral groove direction. FIG. 14 shows an example in which the vacuum heat insulating material 50B in which the seal wrinkle portion 530C is covered by the cover member 120 is sandwiched between the frame plates 60 and 80 to form the heat insulating panel 510. As described above, since the seal wrinkles 530 stand in one direction in the vacuum heat insulating material 50B, this part is covered with the cover member 120, and the side without the seal wrinkles is brought into contact with the cover member 120 to be juxtaposed. Are brought into contact with the frame plates 60 and 80, and surface materials are provided on the upper and lower surfaces. The cover member 120 is made of a slab material or is made of an injection urethane. The heat insulating panel 510 thus configured has an improved filling efficiency of the vacuum heat insulating material, and the cover member 120 has heat insulating and cushioning effects. In addition, as shown in FIG. 15, the cover member 120 can be provided in a state where the seal wrinkles 530C are folded so as to face in the same direction. In this case, the cover member can be formed to be thin, and the arrangement can be facilitated.

[0022]

As described above, according to the present invention, the seal wrinkles of the vacuum heat insulating material are covered and fixed with the covering member, so that the handling becomes easy and the use area ratio of the vacuum heat insulating material can be increased. . Furthermore, the heat insulating panel becomes a panel with a high heat insulating efficiency with a high filling rate of vacuum heat insulating material that is easy to handle.

[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 perspective view of a vacuum heat insulating material according to the present invention.

FIG. 4 is an explanatory view of disposing a vacuum heat insulating material of the heat insulating panel.

FIG. 5 is an explanatory perspective view of a vacuum heat insulating material according to the present invention.

FIG. 6 is an explanatory diagram showing a state of disposing a vacuum heat insulating material in the heat insulating panel according to the present invention.

FIG. 7 is a perspective view showing another example of the heat insulating panel according to the present invention.

FIG. 8 is a perspective view showing another embodiment of the core material.

FIG. 9 is an explanatory sectional view taken along line XX (a) and YY (b) of FIG. 8;

FIG. 10 is a plan view showing another embodiment of the vacuum heat insulating material.

FIG. 11 is a perspective view showing another embodiment of the vacuum heat insulating material.

FIG. 12 is an explanatory top view showing still another embodiment of the vacuum heat insulating material.

FIG. 13 is a perspective view showing still another embodiment of the vacuum heat insulating material.

FIG. 14 is an explanatory diagram of a state where a vacuum heat insulating material is provided in the heat insulating panel.

FIG. 15 is an explanatory diagram of an arrangement state of a cover member when a seal wrinkle portion is bent.

FIG. 16 is a sectional view showing a conventional vacuum heat insulating material.

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

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

FIG. 19 is an explanatory diagram of a conventional heat insulating panel.

FIG. 20 is an explanatory view of a conventional heat insulating panel.

[Explanation of symbols]

 Reference Signs List 5 slab material 50, 50A, 50B vacuum heat insulating material 51, 51A core material 53 synthetic resin film 55 gas adsorbent 60, 80 frame plate 90 gap 110 covering member 120 cover member 500, 510 heat insulating panel 520 concave groove 530 seal portion 530C Seal wrinkle

Claims (8)

[Claims] 1. A vacuum heat insulating material comprising a core material covered with a synthetic resin film to seal an edge of the film and depressurizing the inside of the film, wherein the core material is a seal portion of the synthetic resin film. The seal portion of the synthetic resin film is housed in the groove of the core material, and the seal portion is temporarily pressed by the seal portion. A vacuum heat insulating material, wherein a temporary fixing member to be fixed is disposed, and the temporary fixing member is disposed at least above a seal wrinkle portion formed at a portion where the seal portion intersects. 2. The core member has a different groove shape between adjacent grooves to regulate the rising direction of the seal wrinkle, and a temporary fixing member for temporarily fixing the seal wrinkle has at least a seal wrinkle rising. The vacuum heat insulating material according to claim 1, wherein the seal wrinkles are temporarily fixed by being disposed on the recessed groove. 3. A sealing member of the synthetic resin film is provided with a reinforcing material at an end of the sealing portion to regulate the rising direction of the sealing wrinkling portion and to temporarily fix the sealing wrinkling portion. 2. The vacuum heat insulating material according to claim 1, wherein the seal wrinkles are temporarily fixed by disposing the seal wrinkles at least on the raised grooves. 4. The vacuum heat insulating material according to claim 1, wherein said temporary fixing member has a tape shape having an adhesive. 5. The vacuum heat insulating material according to claim 1, wherein said temporary fixing member is a cover member for accommodating a seal wrinkle portion, and said cover member also serves as a cushioning material. 6. 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. 7. 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 4, and the vacuum heat insulating material is provided with a temporary fixing member. An insulating panel that is adhered and fixed by contacting the side with the adjacent vacuum insulating material. 8. 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 5, and the vacuum heat insulating material is provided with a temporary fixing member. Insulation panels that are placed with the side that is not in contact with adjacent vacuum insulation.