CN209877463U - Vacuum heat insulator and refrigerator using the same - Google Patents
Vacuum heat insulator and refrigerator using the same Download PDFInfo
- Publication number
- CN209877463U CN209877463U CN201920288387.3U CN201920288387U CN209877463U CN 209877463 U CN209877463 U CN 209877463U CN 201920288387 U CN201920288387 U CN 201920288387U CN 209877463 U CN209877463 U CN 209877463U
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- Prior art keywords
- sheet
- vacuum heat
- core material
- fiber aggregate
- outer covering
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/10—Insulation with respect to heat
- F25D2201/14—Insulation with respect to heat using subatmospheric pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Refrigerator Housings (AREA)
- Thermal Insulation (AREA)
Abstract
Provided are a vacuum heat insulator and a refrigerator using the same, wherein the heat insulating performance can be ensured for a long time while suppressing the cost increase. In a vacuum heat insulating material (10) provided with a core material (30) and an outer covering (14) which accommodates the core material (30) and holds the interior in a decompressed state, the core material (30) is provided with a pair of first sheet bodies (32, 33) which are composed of a fiber aggregate and are arranged opposite to the outer covering (14), and a second sheet body (34) which is composed of a fiber aggregate and is arranged between the first sheet bodies (32, 33), and the first sheet bodies (32, 33) have a smaller weight ratio of foreign matters contained in the fiber aggregate than the second sheet body (34).
Description
CROSS-REFERENCE TO RELATED APPLICATIONS, SUCH APPLICATION, AND THE LIKE
The application takes Japanese patent application 2018-54838 (application date: 3/22/2018) as the basis and enjoys the priority of the application. This application incorporates by reference the entirety of this application.
Technical Field
Embodiments of the present invention relate to a vacuum heat insulator and a refrigerator using the same.
Background
In recent years, a refrigerator in which a vacuum heat insulator is disposed inside a heat insulating wall constituting a heat insulating box body is known. As such a vacuum heat insulator, there is known a vacuum heat insulator which includes a core material and an outer covering the core material, and which is sealed by reducing the pressure inside the outer covering. When a fiber aggregate of an inorganic material is used as the core material, foreign matter such as unfiberized matter and metal pieces larger than the fibers constituting the core material is likely to be mixed in.
If such foreign matter is decompressed and sealed in the interior of the outer covering together with the core material, there is a concern that the foreign matter adheres to the outer covering to damage the outer covering, and the heat insulating performance is likely to deteriorate. It is also conceivable to form the entire core material using a fiber aggregate from which foreign matter has been removed, but removal of foreign matter requires time and costs.
SUMMERY OF THE UTILITY MODEL
Accordingly, an object is to provide a vacuum heat insulator and a refrigerator using the same, which can secure heat insulating performance for a long period of time while suppressing an increase in cost.
According to the present embodiment, the following embodiments [1] to [5] are provided.
[1] A vacuum heat insulator is provided with a core material and an outer covering member, wherein the outer covering member accommodates the core material and holds the inside of the core material in a decompressed state, the core material is provided with a pair of first sheet members which are formed by a fiber aggregate and are arranged opposite to the outer covering member, and a second sheet member which is formed by a fiber aggregate and is arranged between the first sheet members, and the first sheet member has a smaller weight ratio of foreign matters contained in the fiber aggregate than the second sheet member.
[2] The vacuum heat insulating material according to item [1], wherein a thickness of the pair of first sheet bodies is different.
[3] The vacuum heat insulating material according to item [2], wherein one of the pair of first sheet members has a concave groove recessed in a thickness direction from a contact surface with the outer covering, and the other first sheet member has a larger thickness.
[4] A refrigerator, wherein a vacuum heat insulating material is arranged between an outer box and an inner box, wherein the vacuum heat insulating material comprises a core material and an outer covering material, the outer covering material is used for accommodating the core material and keeping the interior in a decompression state, the core material comprises a pair of first sheet material bodies which are formed by fiber aggregates and are arranged opposite to the outer covering material, and a second sheet material body which is formed by the fiber aggregates and is arranged between the first sheet material bodies, and the weight ratio of foreign matters contained in the fiber aggregates with a specified volume is smaller in the first sheet material body than in the second sheet material body.
[5] The refrigerator according to item [4], wherein the vacuum heat insulator is bonded and fixed to the outer box, and one of the first sheet members facing the outer box is thicker than the other first sheet member.
Drawings
Fig. 1 is a sectional view of a refrigerator including a vacuum heat insulator according to a first embodiment.
Fig. 2 is a plan view of the vacuum insulation panel of the first embodiment.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is an enlarged view of a main portion of fig. 1.
Fig. 5 is an enlarged sectional view of a main part of a vacuum insulation panel according to a second embodiment.
Detailed Description
(first embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
The present embodiment is a refrigerator using a vacuum heat insulator 10 in a refrigerator main body 1 having a storage chamber 7 formed therein.
Specifically, as shown in fig. 1, the refrigerator main body 1 constitutes a casing of the refrigerator, and includes a heat insulating space 4 formed between an outer box 2 made of a steel plate and an inner box 3 made of a synthetic resin.
A vacuum heat insulator 10 is bonded and fixed to the heat-insulating space 4 side of the outer box 2 with a heat radiation pipe P for heat radiation interposed therebetween. A raw liquid of a foamed heat insulating material 5 made of urethane foam is injected into a gap between the outer box 2 and the inner box 3 and is foamed and filled. In this way, the outer box 2 and the inner box 3 are integrated with the radiating pipe P disposed on the side of the heat insulating space 4 of the outer box 2 and the vacuum heat insulator 10 disposed on the inner side of the refrigerator of the radiating pipe P.
As shown in fig. 2, the vacuum heat insulator 10 is formed in a rectangular plate shape in accordance with the shape of the left and right side surfaces of the outer box 2, and the rectangular plate shape has a long side portion corresponding to the vertical direction of the refrigerator main body 1. As shown in fig. 3, the vacuum heat insulator 10 includes a core 30, an outer cover 14 that houses the core 30 and holds the inside in a reduced pressure state, and concave grooves 20 and 22 that are recessed in the thickness direction of the core 30.
The outer cover 14 is a bag-shaped member made of a laminated film having a plurality of films laminated and gas barrier properties. The outer cover 14 is formed of, for example, a laminate film having a three-layer structure in which a surface protective layer, a gas barrier layer, and a heat-sealing layer are laminated in this order from the outside toward the inside. The surface protective layer can be formed of a relatively heat-resistant synthetic resin such as polyethylene terephthalate, for example. The gas barrier layer can be formed of, for example, a metal vapor deposition material (for example, an aluminum vapor deposition material obtained by vapor depositing aluminum on a resin film) or a metal foil (for example, an aluminum foil). The heat-sealing layer may be formed of a synthetic resin having heat-sealing properties, such as high-density polyethylene. The structure of the laminate film constituting the outer cover 14 is not particularly limited as long as it has gas barrier properties and is heat-weldable. The thickness of the outer cover 14 is thinner than the thickness of the core material 30 and the depth dimensions of the grooves 20 and 22, but the thickness of the outer cover 14 is shown enlarged in the drawings for easy understanding of the description.
The concave grooves 20 and 22 are provided on one surface of the vacuum heat insulator 10, specifically, on the surface facing the outer box 2. The groove 20 is a concave portion extending in the longitudinal direction of the vacuum heat insulator 10 and recessed in the thickness direction of the vacuum heat insulator 10. In the present embodiment, two grooves 20 are provided at intervals in the left-right direction. As shown in fig. 3, the vacuum-exhausted depth D1 of the groove 20 is larger than the outer diameter of the heat pipe P, and a space for disposing the heat pipe P is formed between the groove 20 and the outer case 2. The groove 22 is a concave portion extending along the peripheral edge of the vacuum heat insulator 10, and has an L-shaped cross section that opens outward of the vacuum heat insulator 10. The vacuum-exhausted depth D2 of the groove 22 is set to the same depth as the groove 20.
The core 30 includes a pair of first sheet members 32 and 33 arranged to face the outer cover 14, and a second sheet member 34 arranged between the pair of first sheet members 32 and 33. The thickness T1 of one of the pair of first sheet members 32, 33, which is provided with the concave grooves 20, 22 and is disposed facing the outer box 2, is set to be thicker than the thickness T2 of the other first sheet member 33 disposed facing the foamed heat insulating material 5.
The first sheet members 32 and 33 and the second sheet member 34 are made of a flexible fiber aggregate, for example, a fiber aggregate obtained by molding glass fibers (glass wool) having a fiber diameter of about several μm into a sheet shape. The first sheet members 32 and 33 are formed of a fiber aggregate having a smaller weight ratio of foreign matters contained in a fiber aggregate having a predetermined volume than the fiber aggregate constituting the second sheet member 34.
Here, the foreign matter refers to a substance having a large fiber diameter or particle diameter in the fiber aggregate constituting the first sheet bodies 32 and 33 and the second sheet body 34, and is called shot (non-fiberized particulate matter), or a metal piece mixed in the fiber aggregate. The weight ratio of the foreign matter can be measured by pulverizing a test piece obtained by cutting out a fiber aggregate at a constant volume (for example, a test piece obtained by cutting out 100mm square from the first sheet bodies 32 and 33 and the second sheet body 34 having a constant thickness) with a mixer, using a stainless steel sieve, using a pulverized piece exceeding 50 μm as the foreign matter, and further, using the weight ratio of the foreign matter to the test piece.
In addition to the glass fibers, the fiber aggregate constituting the first sheet members 32, 33 and the second sheet member 34 may be made of various inorganic fibers such as ceramic fibers and rock wool, or organic resin fibers such as polystyrene, polyethylene terephthalate, and polypropylene, and may have a fiber diameter of about 1 to 30 μm.
Here, as an example of the size of the vacuum heat insulator 10, after vacuum evacuation, the depth D1 of the groove 20 is 4 to 8mm, the depth D2 of the groove 22 is 4 to 8mm, the thickness T1 of the first sheet body 32 on one side provided with the groove 20 is 6 to 14mm, the thickness T2 of the first sheet body 33 on the other side disposed opposite to the thermal foam insulator 5 is 4 to 12mm, and the thickness T3 of the first sheet body 32 on the bottom of the groove 20 and the groove 22 is 2 to 6 mm. The thickness of the first sheet material body 32 is preferably at least 2mm or more at any position after vacuum evacuation.
In the vacuum heat insulator 10 having such a configuration, as shown in fig. 4, the one first sheet member 32 that is thicker than the other first sheet member 33 is disposed so as to face the outer box 2 via the outer cover 14, and the surface of the outer cover 14 that faces the one first sheet member 32 is applied with an adhesive and fixed to the outer box 2 by adhesion.
Next, a method for manufacturing the vacuum heat insulator 10 will be described.
First, glass fibers are formed into a predetermined sheet shape corresponding to the shape of the vacuum heat insulator 10, and the first sheet bodies 32 and 33 and the second sheet body 34 are manufactured.
Specifically, the first sheet members 32 and 33 are produced using, for example, glass fibers from which foreign matter has been removed in a step of removing foreign matter from glass fibers produced by a centrifugal method, a flame method, or the like. The second sheet member 34 is produced using, for example, glass fibers produced by a centrifugal method, a flame method, or the like, and then subjected to no foreign matter removal step.
The method of removing foreign matter from the produced glass fibers is not particularly limited, and for example, the foreign matter having a larger specific weight than the glass fibers can be separated by stirring the glass fibers in water.
Next, the second sheet 34 is disposed between the pair of first sheet 32 and 33 to form the core 30. The first sheet members 32 and 33 and the second sheet member 34 may be fixed by a fixing mechanism such as a brace (connecting).
Next, the obtained core 30 is housed inside the bag-shaped outer cover 14. Since the pair of first sheet members 32 and 33 constitutes the outer side surface of the core 30, when the core 30 is accommodated in the outer cover 14, the first sheet members 32 and 33 are disposed to face the outer cover 14.
Then, the inside of the outer cover 14 is vacuum-exhausted by a decompression pump or the like to be decompressed, and the outer cover 14 is sealed by heat fusion or the like while maintaining the decompressed state. Thereby, the flat plate-like vacuum insulation material 10 in which the grooves 20 and 22 are not formed is obtained.
Next, the vacuum heat insulating material 10 sealed in a state where the inside is decompressed is compressed from the outer surface of the outer cover 14 by a press device not shown, and the concave grooves 20 and 22 are formed in one of the pair of first sheet members 32 and 33, whereby the vacuum heat insulating material 10 is obtained. In addition to the compression by the press device, the grooves 20 and 22 may be compressed by, for example, a press roll to compress the core member 30, thereby manufacturing the vacuum insulation panel 10 having the grooves 20 and 22.
In the vacuum heat insulator 10 of the present embodiment as described above, the weight ratio of foreign matter contained in the fiber aggregate is smaller in the pair of first sheet bodies 32 and 33 disposed to face the outer cover 14 than in the pair of second sheet bodies 34, and therefore damage to the outer cover 14 due to foreign matter can be suppressed, and the vacuum state inside the outer cover 14 can be maintained for a long period of time, and the heat insulating performance can be maintained.
In addition, since the glass fiber that has not been subjected to the step of removing foreign matter can be used for the second sheet body 34 disposed between the pair of first sheet bodies 32 and 33, it can be manufactured at low cost.
In addition, the first sheet members 32 and 33 have fibers dispersed and the surfaces thereof are smoothed in the step of removing foreign substances, and the surface of the outer covering 14 constituting the outer surface of the vacuum heat insulating material 10 is also smoothed. Therefore, the wettability of the outer surface of the vacuum heat insulator 10 is improved, and the adhesive strength of the vacuum heat insulator 10 can be improved.
In the vacuum heat insulator 10 of the present embodiment, the thickness T1 of one first sheet member 32 of the pair of first sheet members 32 and 33 disposed to face the outer covering 14 is set to be thicker than the thickness T2 of the other first sheet member 33. The surface of the one thick first sheet member 32 is less susceptible to the surface condition of the second sheet member 34, and is smoother than the surface of the other first sheet member 33, so that the vacuum heat insulator 10 can be firmly bonded and fixed.
In the vacuum heat insulator 10 of the present embodiment, since the concave grooves 20 and 22 are provided in the first sheet member 32 having a thick wall, the thickness of the first sheet member 32 can be secured at the bottom portions of the concave grooves 20 and the concave grooves 22, and damage to the outer cover 14 can be suppressed.
(second embodiment)
Next, a second embodiment will be described with reference to fig. 5. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
In the vacuum heat insulator 110 of the present embodiment, a part of one first sheet member 132 is removed and grooves 20 and 22 recessed in the thickness direction of the core 30 are provided.
Specifically, as shown in fig. 5, the first sheet member 132 of one of the first sheet members 132 and 33 constituting the core 30 of the vacuum heat insulator 110 includes a flat plate-like base portion 132a disposed so as to cover the entire one surface of the second sheet member 34, and a plurality of land portions 132b protruding from the base portion 132a, and the grooves 20 and 22 are formed between the land portions 132 b.
In the vacuum heat insulator 110 of the present embodiment, since the first sheet member 132 is removed at the position of the concave grooves 20 and 22, the pressure required to compress the vacuum heat insulator 10 to form the concave grooves 20 and 22 can be suppressed, and damage to the outer covering 14 can be suppressed.
(other embodiments)
While the embodiments of the present invention have been described above, these embodiments have been presented as examples, and are not intended to limit the scope of the invention. These embodiments can be implemented in other various manners, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. These embodiments and modifications are included in the scope and gist of the invention, and are also included in the scope of the claims and the equivalent thereof.
Claims (5)
1. A vacuum heat insulator comprising a core material and an outer covering member which houses the core material and holds the inside thereof in a reduced pressure state, characterized in that,
the core material includes a pair of first sheet bodies made of a fiber aggregate and arranged to face the outer covering, and a second sheet body made of a fiber aggregate and arranged between the first sheet bodies, and the first sheet body has a smaller weight ratio of foreign matter contained in the fiber aggregate than the second sheet body.
2. The vacuum insulation panel of claim 1,
the pair of first sheet bodies have different thicknesses.
3. The vacuum insulation panel of claim 2,
one of the pair of first sheet members has a concave groove recessed in a thickness direction from a contact surface with the outer covering, and is thicker than the other first sheet member.
4. A refrigerator, a vacuum heat insulation piece is arranged between an outer box and an inner box, which is characterized in that,
the vacuum heat insulating material comprises a core material and an outer covering material which accommodates the core material and holds the interior thereof in a reduced pressure state,
the core material includes a pair of first sheet bodies made of an aggregate of fibers and arranged to face the outer covering, and a second sheet body made of an aggregate of fibers and arranged between the first sheet bodies, and the first sheet body has a smaller weight ratio of foreign matter contained in a fiber aggregate having a predetermined volume than the second sheet body.
5. The refrigerator of claim 4,
the vacuum heat insulation piece is adhered and fixed on the outer box,
one of the first sheet members facing the outer box is thicker than the other first sheet member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-054838 | 2018-03-22 | ||
| JP2018054838A JP2019168001A (en) | 2018-03-22 | 2018-03-22 | Vacuum heat insulating material and refrigerator using vacuum heat insulating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209877463U true CN209877463U (en) | 2019-12-31 |
Family
ID=68026375
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920288387.3U Active CN209877463U (en) | 2018-03-22 | 2019-03-07 | Vacuum heat insulator and refrigerator using the same |
| CN201910171797.4A Pending CN110296573A (en) | 2018-03-22 | 2019-03-07 | Vacuumed insulation panel and the refrigerator for having used Vacuumed insulation panel |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910171797.4A Pending CN110296573A (en) | 2018-03-22 | 2019-03-07 | Vacuumed insulation panel and the refrigerator for having used Vacuumed insulation panel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2019168001A (en) |
| CN (2) | CN209877463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296573A (en) * | 2018-03-22 | 2019-10-01 | 东芝生活电器株式会社 | Vacuumed insulation panel and the refrigerator for having used Vacuumed insulation panel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7407588B2 (en) * | 2019-12-20 | 2024-01-04 | 東芝ライフスタイル株式会社 | Method of manufacturing insulation material and method of manufacturing refrigerator |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4032906A1 (en) * | 1990-10-17 | 1992-04-23 | Ke Rohrsysteme Umwelttech | Use of steel tape for mfr. of pipes - contg. chromium@ nickel@ and iron@ |
| JP2002310384A (en) * | 2001-04-11 | 2002-10-23 | Matsushita Refrig Co Ltd | Vacuum heat insulation material, refrigerating appliance with vacuum heat insulation material, electric water heater, and oven-range |
| CN100532910C (en) * | 2004-06-03 | 2009-08-26 | 松下电器产业株式会社 | Vacuum heat insulation material and cold reserving apparatus with the same |
| JP2006070908A (en) * | 2004-08-31 | 2006-03-16 | Hitachi Home & Life Solutions Inc | Vacuum heat insulating material and refrigerator |
| JP4690809B2 (en) * | 2005-07-25 | 2011-06-01 | 日立アプライアンス株式会社 | Vacuum heat insulating material and manufacturing method thereof |
| JP4774320B2 (en) * | 2006-03-30 | 2011-09-14 | 日立アプライアンス株式会社 | Vacuum heat insulating material and manufacturing method thereof |
| CN201739710U (en) * | 2010-04-20 | 2011-02-09 | 福建赛特新材料有限公司 | Vacuum insulation panel with groove on surface |
| JP6558874B2 (en) * | 2014-02-05 | 2019-08-14 | 三菱電機株式会社 | Manufacturing method of vacuum insulation |
| US20160305598A1 (en) * | 2014-02-26 | 2016-10-20 | Sonoco Development, Inc. | Method of Manufacturing Vacuum Insulation Panels |
| JP2019168001A (en) * | 2018-03-22 | 2019-10-03 | 東芝ライフスタイル株式会社 | Vacuum heat insulating material and refrigerator using vacuum heat insulating material |
-
2018
- 2018-03-22 JP JP2018054838A patent/JP2019168001A/en active Pending
-
2019
- 2019-03-07 CN CN201920288387.3U patent/CN209877463U/en active Active
- 2019-03-07 CN CN201910171797.4A patent/CN110296573A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296573A (en) * | 2018-03-22 | 2019-10-01 | 东芝生活电器株式会社 | Vacuumed insulation panel and the refrigerator for having used Vacuumed insulation panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019168001A (en) | 2019-10-03 |
| CN110296573A (en) | 2019-10-01 |
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