JP2013228015A - Vacuum heat insulation material and device to be heat-insulated - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material by which a coating rate to a part to be heat-insulated is raised, and which can improve temperature-preservation performance.SOLUTION: A vacuum heat insulation material is composed of: a skeleton 2 whose contour has a three-dimensional curved face, and which is constituted of plastic for holding the three-dimensional curved face; a core 3 which is arranged around the skeleton 2, and constituted of an inorganic fiber, an organic fiber or a complex fiber composed of them; and a packaging part 4 which covers the skeleton 2 and the core 3, and holds the inside in a pressure-reduced state. The skeleton 2 is formed in such a manner that a plurality of skeleton materials 20 are vertically and laterally crossed.

Description

  The present invention relates to a vacuum heat insulating material and a heat insulating device that can increase the coverage of the heat insulating portion and improve the heat retaining performance.

  With conventional vacuum heat insulating materials, with the recent promotion of energy saving activities, high-efficiency technology for reducing power consumption of living environment equipment has become important. In particular, in a device that has a heat source and efficiently provides stored heat for the main purpose, it is required to increase the efficiency of the heat insulating structure between the heat storage section and the outside. A water heater is an example of this, and in order to improve the heat retention efficiency of the hot water storage tank and reduce the amount of power consumption, a heat insulating material composed of a combination of a vacuum heat insulating material with excellent heat insulating performance and a foaming resin is coated on the corresponding location. This has been achieved. In order to further improve the heat insulation efficiency of the hot water storage tank, it is desirable to arrange the vacuum heat insulating material in close contact with the outer peripheral surface of the hot water tank and the outer peripheral surface of the upper surface.

  Conventionally, the vacuum heat insulating material has been formed in a flat plate shape, and when it is arranged around a hot water storage tank having a curved surface, a portion that is in close contact with the surface of the hot water storage tank and a portion that is not in close contact occur, and the heat insulation efficiency is reduced in the portion that is not in close contact. Arise. As a countermeasure, vacuum-formed heat insulating material is deformed by post-processing such as pressing and bonded to a curved hard plastic (for example, see Patent Document 1), or a groove is formed in the flat portion of the vacuum heat insulating material. In some cases, a flat heat insulating material having flexibility is applied to a target heat insulating portion (for example, see Patent Document 2).

JP-A No. 2004-132438 (page 4, lines 8 to 27, FIG. 1) JP 2001-336691 (page 3, lines 1 to 22, FIG. 1)

It is stated that the previous conventional vacuum heat insulating material can be maintained in a desired shape by molding it with a bending die while heating a flat plate-shaped vacuum heat insulating material and adhering a hard foamable plastic to at least one surface. However, the packaging part covering the outermost part of the vacuum heat insulating material is provided with a barrier layer for maintaining long-term airtightness, and this barrier layer is damaged by elongation due to bending or the thickness of the layer is reduced. Significantly deteriorates airtightness. For this reason, there existed a problem that the heat insulation performance as a vacuum heat insulating body was impaired remarkably.

  The later conventional vacuum heat insulating material improves the flexibility of the flat plate heat insulating material by adjusting the stacking amount of the core portion accommodated in the vacuum heat insulating material in advance and forming a groove in the flat surface perpendicular to the thickness direction. There is also an introduction of heat insulation. In this case, although it is useful as a heat insulator for a shape part that needs to be bent, a shape having a three-dimensional curved surface such as the outer peripheral portion of the upper surface of the water heater tank is processed into a desired shape to increase the coverage. However, there was a problem that the heat insulation structure was not fully satisfied.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a vacuum heat insulating material and a heat insulating device capable of increasing the coverage of the heat insulating portion and improving the heat retaining performance. And

The vacuum heat insulating material of this invention is
A skeleton composed of plastic having an outer shape having a three-dimensional surface and holding the three-dimensional surface;
A core portion disposed around the skeleton portion, composed of inorganic fibers, organic fibers, or composite fibers thereof; and
The skeleton part and the core part are covered with a packaging part that holds the inside in a reduced pressure state.

Moreover, the heat-insulated device of this invention is
In a heat-insulated device including a heat-insulated part,
The three-dimensional surface of the vacuum heat insulating material described above is formed and disposed along the outer peripheral shape of the heat-insulated portion.

The vacuum heat insulating material of this invention is
A skeleton composed of plastic having an outer shape having a three-dimensional surface and holding the three-dimensional surface;
A core portion disposed around the skeleton portion, composed of inorganic fibers, organic fibers, or composite fibers thereof; and
Since it is composed of a wrapping part that covers the skeleton part and the core part and holds the inside in a reduced pressure state,
The coverage to a heat insulation part increases and heat retention performance improves.

Moreover, the heat-insulated device of this invention is
In a heat-insulated device including a heat-insulated part,
Since the three-dimensional surface of the vacuum heat insulating material described above is formed and arranged along the outer peripheral shape of the heat-insulated part,
The coverage to a heat insulation part increases and heat retention performance improves.

It is a figure which shows the structure of the vacuum heat insulating material of Embodiment 1 of this invention. It is a figure which shows the structure of the frame | skeleton part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the upper-layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the intermediate | middle layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the lower layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the manufacturing method of the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the hot water storage tank in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the frame part of the other example in the vacuum heat insulating material of Embodiment 1 of this invention. It is a figure which shows the structure of the frame part of the other example in the vacuum heat insulating material of Embodiment 1 of this invention. It is a figure which shows the structure of the frame part of the other example in the vacuum heat insulating material of Embodiment 1 of this invention. It is a figure which shows the structure of the vacuum heat insulating material of Embodiment 2 of this invention. It is a figure which shows the structure of the frame | skeleton part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the upper-layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the intermediate | middle layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the lower layer core part in the vacuum heat insulating material shown in FIG. It is a figure which shows the structure of the frame part of the other example in the vacuum heat insulating material of Embodiment 2 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 3 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 4 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 5 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 6 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 7 of this invention. It is a figure which shows the structure of the core part combination of the vacuum heat insulating material of Embodiment 8 of this invention. It is a figure which shows the arrangement configuration to the water heater of the vacuum heat insulating material of Embodiment 9 of this invention. It is a figure which shows the arrangement configuration to the water heater of the vacuum heat insulating material of Embodiment 10 of this invention.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. In the present invention, when a generally used flat vacuum heat insulating material or the like is post-processed to form a desired shape, wrinkles or cracks in the packaging part and breakage are caused and the vacuum inside the packaging part is broken. In addition, there is a risk of pulling to an intermediate layer having gas barrier properties and applying a compressive load to promote deterioration over time, resulting in a lack of reliability. Therefore, the present invention proposes a structure and a manufacturing method of a heat insulating material having an arbitrary three-dimensional surface without giving a burden to the packaging part.

  1 is a top view (a) showing a configuration of a vacuum heat insulating material in Embodiment 1 of the present invention and a cross-sectional view (b) taken along the line A-A 'of the top view. In the figure, the vacuum heat insulating material 1 is composed of a skeleton part 2, a core part 3, and a packaging part 4. FIG. 2 is a top view (a) and a side view (b) showing the configuration of only the skeleton part 2 of the vacuum heat insulating material 1 shown in FIG. The skeleton part 2 is formed by a plurality of skeleton members 20 having a shape having a three-dimensional curved surface as a three-dimensional surface in an outer shape that can be closely adhered along the outer peripheral shape of the heat-insulated part. In addition, it is formed of a plastic having such a strength that it can maintain such a three-dimensional curved surface even in a reduced pressure by a packaging unit described later. In order to suppress a decrease in thermal resistance in the direction (vertical direction) perpendicular to the three-dimensional curved surface of the vacuum heat insulating material 1 by heat conducted by itself, it is desirable to use a material having low thermal conductivity, for example, It is possible to form from a hard foam plastic.

  The number and size of the skeleton material 20 of the skeleton part 2 can be arbitrarily set depending on the application and required strength. Here, the skeleton material 20 formed radially and the skeleton material 20 formed on the circumference are configured to intersect vertically and horizontally. And, for example, if the outer diameter (diameter in FIG. 2A) is 500 mm, the length of the horizontal side of the longitudinal section of the skeleton 20 is 5 to 10 mm, and the length of the vertical side is strength. From this point of view, it is formed with a length of 10 to 20 mm longer than the length of the lateral side.

  The core portion 3 includes an upper layer core portion 3a formed so as to cover the upper surface of the skeleton portion 2, a lower layer core portion 3c formed so as to cover the lower surface of the skeleton portion 2, and each skeleton material of the skeleton portion 2. The middle layer core portion 3b is formed so as to be inserted between 20 vertical and horizontal crossings. 3 to 5 are a top view (a) and a top view A showing the respective configurations of the upper core portion 3a, middle layer core portion 3b, and lower layer core portion 3c of the core portion 3 of the vacuum heat insulating material 1 shown in FIG. It is -A 'sectional view (b). The core part 3 is comprised from an inorganic fiber, an organic fiber, or those composite fibers. Examples of the inorganic fiber include glass fiber, rock wool fiber, alumina fiber, silica fiber, and slag wool fiber. Examples of organic fibers include acrylic fibers, polyester fibers, polyethylene fibers, polypropylene resins, polyurethane fibers, polynosic fibers, polyvinyl alcohol fibers, nylon fibers, rayon fibers, and other natural fibers such as cotton, silk, and linen. Fiber. From the viewpoint of heat insulation, it is preferable to use glass fibers of inorganic fibers. However, it is not limited to the material examples illustrated here.

  Each of the cores 3 (refers to the upper core part 3a, the middle core part 3b, and the lower core part 3c, and may be referred to as “each core part 3” hereinafter). It is formed by simultaneously molding the ones accumulated so that the fiber direction is oriented in a direction parallel to the surface of the core part 3 into the shape shown in FIGS. 3 to 5. In addition, it is not restricted to this formation method, What is necessary is just the method which can form the core part 3 similarly by another method. The reason why the cores 3 are arranged in the direction in which the fiber direction transmits heat, that is, in the direction parallel to the three-dimensional curved surface of the vacuum heat insulating material, is to suppress the heat transmitted in the direction (vertical direction) perpendicular to the three-dimensional curved surface. This is to obtain a high heat insulating effect.

  The packaging part 4 covers the skeleton part 2 and the core part 3, is fused by the fusion part 5, and maintains the inside in a reduced pressure state. The packaging part 4 has a gas barrier property, can hold the internal decompression state (hereinafter also referred to as “vacuum state”) from an external impact for a long period of time, and is excellent in a high heat insulating material (low heat conduction material). Preferably it is formed. For example, it is preferable that the innermost layer and the outermost layer of the packaging part 4 are laminated with nylon, polyethylene terephthalate resin, polyethylene resin, polystyrene resin or the like, and the gas barrier layer of the intermediate layer is made of metal vapor deposition such as aluminum or a metal foil material. It is. However, it is not limited to the material examples illustrated here. An opening 6 is formed in the vacuum heat insulating material 1. Therefore, the skeleton part 2 and each core part 3 are configured to avoid the opening 6. Further, on the inner peripheral side of the opening 6, the packaging part 4 includes a fusion part 5.

  Next, the manufacturing method of the vacuum heat insulating material of Embodiment 1 comprised as mentioned above is demonstrated using FIG. First, the core 3 accumulates and fills inorganic fibers, organic fibers, or composite fibers thereof (step S1 in FIG. 6). Next, the respective molds are molded by compression molding as shown in FIGS. 3 to 5 (step S2 in FIG. 6). Next, the core part 3 is arranged around the skeleton part 2 and assembled (step S4 in FIG. 2). As shown in the AA ′ cross-sectional view of FIG. 1, the core portion 3 includes an upper-layer core portion 3 a disposed on the outer surface of the skeleton portion 2 and a middle-layer core portion 3 b disposed in a lattice gap between the skeleton portion 2 and the skeleton portion 2. It is divided into three of the lower layer core part 3c arrange | positioned at the inner surface. The upper layer core portion 3a and the lower layer core portion 3c have a heat insulating effect on the entire covered region, and also have a function of suppressing the flow of heat entering and leaving the skeleton portion 2. As described above, the middle-layer core portion 3b is preliminarily compressed and molded so that it can be inserted between the skeleton materials 20 of the skeleton portion 2. The upper core portion 3a and the lower core portion 3c are similarly molded along the outer shape of the skeleton portion 2.

  Next, the core portion 3 disposed around the skeleton portion 2 is wrapped by the upper and lower two packaging portions 4 (step S5 in FIG. 6). In addition, the packaging part 4 is not limited to two sheets. Next, in order to maintain airtightness during decompression, the two packaging parts 4 are fused along the fusion part 5 on the outer peripheral part (step S6 in FIG. 6). Further, the two packaging parts 4 are fused along the fused part 5 of the opening (step S7 in FIG. 6). At this time, the exhaust port is not fused, and the exhaust port can be set at an arbitrary place. Next, the inside of the packaging part 4 is depressurized (vacuum) from the exhaust port by a decompression device such as a vacuum pump (step S6 in FIG. 6). After that, in order to maintain airtightness, the periphery of the exhaust port is fused. Next, the opening part 6 is opened and formed in the packaging part 4.

  At the time of this pressure reduction, each packaging part 4 starts to contract and move so as to be in close contact with the outer surface of the skeleton part 2, but the wrapping part 4 that is in close contact with the outer curved surface of the skeleton part 2 due to the circumferential length difference caused by the thickness of the skeleton part 2. There is a difference in the amount of movement of the wrapping part 4 in close contact with the inner curved surface of the skeleton part 2. In order to relax and absorb this, it is desirable that the size of the packaging part 4 is sufficiently larger than the outer shape of the skeleton part 2. When the size of the packaging part 4 is smaller than the outer shape of the skeleton part 2, the fusion part 5 comes into contact with the outer periphery of the skeleton part 2 during the contraction movement of the packaging part 4 during decompression, and the packaging part 4 and the fusion part The part 5 may be damaged and the skeleton part 2 may be deformed.

  Next, the case where the vacuum heat insulating material of Embodiment 1 comprised as mentioned above is applied to the heat-insulated apparatus which has a to-be-insulated part is demonstrated based on FIG. In the figure, a water heater 10 as a heat-insulated device includes a hot water storage tank 11 as a heat-insulated part, an upper pipe 13 as a pipe necessary for entering and exiting hot water respectively disposed above and below the hot water storage tank 11, and a lower side. The piping 14 and the exterior container 12 by which the hot water storage tank 11 was arrange | positioned are provided. And the three-dimensional curved surface of the external shape of the frame | skeleton part 2 of the vacuum heat insulating material 1 is formed so that it may closely_contact | adhere to the upper curved surface of the hot water storage tank 11. FIG. The opening 6 is formed so that the upper pipe 13 can pass therethrough. In addition, when the opening part 6 is not formed previously, it is also possible to process at the time of installation, but it is a condition that the frame | skeleton material 20 does not exist in the location.

  Further, in the first embodiment, the example in which the shape of the skeleton material 20 of the skeleton part 2 is arranged radially and intersects vertically and horizontally is shown, but the present invention is not limited to this. As shown in FIG. 8, FIG. 9, or FIG. 10, the skeleton material 2 may be provided to form the skeleton 2. In that case, in order to maintain the strength of the skeleton 2, it is considered that a lattice shape as shown in FIG. 9 is suitable. Further, as the skeleton part 2, a plate-like one having a three-dimensional surface, a plate having a three-dimensional surface, and ribs may be considered. Further, a portion of the skeleton 2 where friction or stress concentration with the packaging portion 4 occurs due to the decompression process, for example, a corner portion of the skeleton 2 needs R processing or chamfering to prevent damage to the packaging portion.

  According to the vacuum heat insulating material of the first embodiment configured as described above, since the outer shape of the skeleton portion is formed in advance in a three-dimensional curved surface, the processing for arranging along the shape of the heat-insulated portion. Is not required after depressurization, so that a vacuum heat insulating material that does not damage the packaging part, particularly the barrier layer, can be obtained. This makes it possible to have a high thermal insulation efficiency in close contact with the part to be insulated, and to provide a vacuum thermal insulation material with a high thermal insulation effect that suppresses heat leakage. Moreover, there is a merit that the thickness of the heat insulating material can be arbitrarily set even in the case of applications requiring higher heat insulating performance.

  In addition, at the time of installation, no post-processing is required, and it is possible to suppress the heat insulation performance deterioration as a vacuum heat insulator due to wrinkles and cracks and tearing in the packaging part, and it is possible to closely contact the part to be insulated, It is possible to provide a vacuum insulation material with long life and good heat insulation efficiency. In addition, since the skeleton part is configured so that the skeleton material intersects the length and breadth, the strength can be maintained, and the surface of the skeleton part can be covered with a highly heat-insulating core part, so that it is possible to provide a vacuum heat insulating material with good heat insulation efficiency. .

  In the first embodiment, an example of a water heater is shown as the heat-insulated device. However, the present invention is not limited to this, and can be adapted for use in hot and cold equipment. Specifically, vending machines, heat-retaining containers, refrigerators, water heaters, domestic or commercial water heaters (water heaters), domestic or commercial refrigeration / air-conditioners, jar pots, etc. It can be applied in the same manner as in the first embodiment. In addition, since this point is the same also in the following embodiment, the description is abbreviate | omitted suitably.

Embodiment 2. FIG.
FIG. 7 is a view showing a configuration of a vacuum heat insulating material in Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In this Embodiment 2, it has the cutout part 60 for piping cut out to a part of edge | side of the packaging part 4. As shown in FIG. FIG. 11 is a top view (a) showing the configuration of the vacuum heat insulating material according to Embodiment 2 of the present invention, and a cross-sectional view taken along line AA ′ of the top view (FIG. 12), and FIG. 12 is the vacuum heat insulating material 1 shown in FIG. It is the top view (a) and side view (b) which show the structure of only the frame part 2. 13 to 15 are a top view (a) and a top view A showing the respective configurations of the upper core portion 3a, middle layer core portion 3b, and lower layer core portion 3c of the core portion 3 of the vacuum heat insulating material 1 shown in FIG. It is -A 'sectional view (b). It is to be noted that the parts other than the notch 60 are the same as those in the first embodiment.

  Moreover, in the said Embodiment 2, although the example which forms the shape of the frame | skeleton material 20 of the frame | skeleton part 2 so that it may cross | intersect lengthwise and width was shown, it is not restricted to this, For example, as shown in FIG. Alternatively, the skeleton member 20 may be provided to form the skeleton part 2.

  According to the vacuum heat insulating material of the second embodiment configured as described above, the same effect as that of the first embodiment can be obtained, as well as the hot water storage tank of the water heater as in the first embodiment. When applied, the vacuum heat insulating material can be detached from the notch without removing the pipe, and a vacuum heat insulating material with high maintainability can be provided.

Embodiment 3 FIG.
FIG. 17 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 3 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 3 is the same as that of FIG. 1 (a) of the said Embodiment 1, FIG. 17 showed the AA 'line sectional drawing of FIG. 1 (a). Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 arranged around the skeleton portion 2 includes only the middle layer core portion 3b and the lower layer core portion 3c and does not include the upper layer core portion.

  According to the third embodiment configured as described above, the core portion can be omitted according to the margin of heat insulation performance, as well as the same effects as the above-described embodiments. The cost can be reduced.

Embodiment 4 FIG.
FIG. 18 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 4 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 4 is the same as that of Fig.1 (a) of the said Embodiment 1, and FIG. 18 showed the AA 'line sectional drawing of Fig.1 (a). Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 disposed around the skeleton portion 2 includes only the upper layer core portion 3a and the middle layer core portion 3b and does not include the lower layer core portion.

  According to the fourth embodiment configured as described above, the core portion can be omitted depending on the margin of heat insulation performance, as well as the same effects as the above-described embodiments. The cost can be reduced.

Embodiment 5 FIG.
FIG. 19 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 5 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 5 is the same as that of FIG. 1 (a) of the said Embodiment 1, FIG. 19 showed the AA 'line sectional drawing of FIG. 1 (a). Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 disposed around the skeleton portion 2 includes only the upper layer core portion 3a and the lower layer core portion 3c and does not include the middle layer core portion.

  According to the fifth embodiment configured as described above, the core portion can be omitted according to the margin of heat insulation performance, as well as the same effects as the above-described embodiments. The cost can be reduced.

Embodiment 6 FIG.
FIG. 20 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 6 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 6 is the same as that of FIG. 1 (a) of the said Embodiment 1, FIG. 20 showed the AA 'line sectional drawing of FIG. 1 (a). Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 arranged around the skeleton portion 2 includes only the middle layer core portion 3b and does not include the upper layer core portion and the lower layer core portion.

  According to the sixth embodiment configured as described above, the core portion can be omitted according to the margin of heat insulation performance as well as the same effects as the above-described embodiments. The cost can be reduced.

Embodiment 7 FIG.
FIG. 21 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 7 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 7 is the same as that of FIG. 1 (a) of the said Embodiment 1, FIG. 21 showed the sectional view on the AA 'line of FIG. 1 (a). Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 disposed around the skeleton portion 2 includes only the lower layer core portion 3c and does not include the upper layer core portion and the middle layer core portion.

  According to the seventh embodiment configured as described above, it is possible to omit the core portion according to the margin of heat insulation performance, as well as the same effects as the above embodiments, The cost can be reduced.

Embodiment 8 FIG.
FIG. 22 is a cross-sectional view showing the configuration of the vacuum heat insulating material according to Embodiment 8 of the present invention. In addition, the upper surface of the vacuum heat insulating material 1 in this Embodiment 8 is the same as that of FIG. 1A of the said Embodiment 1, FIG. 22 showed the AA 'line sectional drawing of FIG. 1A. Is. Further, the present invention is applied to the hot water storage tank 11 as in the case of the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference from the first embodiment is that the core portion 3 arranged around the skeleton portion 2 includes only the upper layer core portion 3a and does not include the middle layer core portion and the lower layer core portion.

  According to the eighth embodiment configured as described above, the core portion can be omitted according to the margin of heat insulation performance as well as the same effects as the above-described embodiments. The cost can be reduced.

Embodiment 9 FIG.
FIG. 23 is a diagram showing an example in which the vacuum heat insulating material 1 according to the ninth embodiment of the present invention is applied to the water heater 10. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. The vacuum heat insulating material 1 is provided with a foam heat insulating portion 15 made of a foam resin on the lower surface. The foam heat insulating portion 15 is formed in a shape close to the inner surface on the outer peripheral surface on the upper side of the hot water storage tank 11 with an arbitrary thickness. It is desirable that the packaging part 4 and the foam heat insulating part 15 are joined with an adhesive or the like. Although not shown, the foam heat insulating portion 15 is formed so as to avoid the opening 6.

  According to the vacuum heat insulating material of the ninth embodiment configured as described above, the heat of the upper side of the hot water storage tank, which is high in temperature, is the same as that of each of the above embodiments. Since it is not transmitted directly to the packaging part, it is possible to cope with a low thermal insulation grade of the packaging part, and to reduce the cost.

Embodiment 10 FIG.
FIG. 24 shows an example in which the vacuum heat insulating material 1 in the tenth embodiment of the present invention is applied to the water heater 10. In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and description thereof is omitted. The vacuum heat insulating material 1 includes a foam heat insulating portion 16 formed of a foamed resin formed so as to cover the entire surface of the packaging portion 4 and is formed by insert molding. At this time, it is desirable that the portion of the packaging part 4 that protrudes from the skeleton part 2 is bent along the inside of the skeleton part 2. Although not shown, the foam heat insulating portion 16 is formed in a manner to avoid the opening 6.

  According to the vacuum heat insulating material of the tenth embodiment configured as described above, the heat of the upper side of the hot water storage tank that is high in temperature is not limited to the same effect as that of each of the above embodiments. Since it is not transmitted directly to the packaging part, it is possible to cope with a low thermal insulation grade of the packaging part, and to reduce the cost. Furthermore, since the foam heat insulation part is arrange | positioned in the whole surface of a packaging part, heat insulation can be performed with high efficiency.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 vacuum heat insulating material, 2 skeleton part, 3 core part, 3a upper layer core part, 3b middle layer core part,
3c Lower layer core part, 4 packaging part, 5 fusion part, 6 opening part, 10 water heater,
11 hot water storage tank, 12 outer container, 13 upper piping, 14 lower piping,
15 foam insulation part, 16 foam insulation part, 20 skeleton material, 60 notch.

Claims (9)

A skeleton composed of plastic having an outer shape having a three-dimensional surface and holding the three-dimensional surface;
A core portion disposed around the skeleton portion, composed of inorganic fibers, organic fibers, or composite fibers thereof; and
The vacuum heat insulating material comprised with the packaging part which covers the said frame | skeleton part and the said core part, and hold | maintains the inside in a pressure reduction state. The vacuum heat insulating material according to claim 1, wherein the core portion is formed so as to cover an upper surface of the skeleton portion. The vacuum heat insulating material according to claim 1, wherein the core portion is formed so as to cover a lower surface of the skeleton portion. The vacuum heat insulating material according to any one of claims 1 to 3, wherein the skeleton portion is formed by crossing a plurality of skeleton materials vertically and horizontally. The vacuum heat insulating material according to claim 4, wherein the core portion is formed so as to be inserted between vertical and horizontal crossings of the skeleton materials. The vacuum heat insulating material according to any one of claims 1 to 5, comprising at least one of an opening or a notch. The vacuum heat insulating material of any one of Claim 1 thru | or 6 provided with the foam heat insulation part comprised from a foamed resin so that a part or all of the said packaging material may be covered. In a heat-insulated device including a heat-insulated part,
The heat insulating apparatus in which the three-dimensional surface of the vacuum heat insulating material according to any one of claims 1 to 7 is formed and disposed so as to follow an outer peripheral shape of the heat insulating portion. In a heat-insulated device including a heat-insulated portion and a pipe disposed in the heat-insulated portion,
The three-dimensional surface of the vacuum heat insulating material according to claim 6 is formed and disposed along the outer peripheral shape of the heat-insulated portion, and the pipe is disposed at the opening or the notch. apparatus.

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