JP2011099566A - Vacuum heat insulating panel and refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent heat leakage from a bent part of a vacuum heat insulating panel while suppressing an influence of a heat bridge caused by an increase in an area of the vacuum heat insulating panel, in the vacuum heat insulating panel. <P>SOLUTION: The vacuum heat insulating panels 50a, 50b include a core material formed of a fiber aggregate, and an outer cover material covering the core material, and depressurizing and sealing the inside. The core material has a repulsive property with respect to a compression direction. The vacuum heat insulating panels 50a, 50b have three-dimensional shapes in which buckling and fracture in the inside part of the bent part or a recessed/protruded part are inhibited and a decrease in plate thickness is limited by using the repulsive property with respect to the compression direction of the core material. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulation panel and a refrigerator.

  In recent years, from the viewpoint of global environmental protection such as prevention of global warming, energy saving is also demanded for refrigerators. In addition, as a recent social background, an increasing number of households buy foods together, and so on, and the need for a large capacity refrigerator is increasing.

  Conventionally, refrigerators have refrigeration cycle parts that circulate refrigerants such as a compressor, a condenser, and a heat radiating pipe, and electrical parts such as a control board and a power supply board. These are self-heating when the refrigerator is operated and the temperature rises. In order to suppress the heat intrusion into the cabinet due to the temperature rise of these parts, in consideration of energy saving, it was generally done to thicken the heat insulation wall corresponding to these parts, but the capacity increase It was a negative factor from the viewpoint.

  Conventionally, refrigerators have been improved in heat insulation performance by applying a plate-like vacuum heat insulation panel, thereby reducing the thickness of the heat insulation wall. However, the place where you want to place the vacuum insulation panel is often a three-dimensional shape, and many vacuum insulation panels of small size will be used, and the influence of the heat bridge of the jacket material of each vacuum insulation panel will increase. The improvement of the heat insulation performance by the vacuum heat insulation panel was suppressed.

  Examples of improving this are disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-336691 (Patent Document 1), Japanese Patent Application Laid-Open No. 2004-11708 (Patent Document 2), and Japanese Patent Application Laid-Open No. 2006-125686 (Patent Document 3). A refrigerator has been devised.

  In the refrigerator of Patent Document 1, the flat vacuum heat insulation panel is grooved to give flexibility and bendable, and bend to fit the outer box wall surface of the upper machine room of the refrigerator. The area of one vacuum heat insulation panel is enlarged by installing a vacuum heat insulation panel along with.

  In the refrigerator of Patent Document 2, a molded body having a binder concentration lower than the surface layer is used as a core material, and the refrigerant pipe is not damaged by a molding method such as a normal die press. By making the groove processing along, it is possible to arrange the vacuum heat insulation panel in the refrigerant piping portion where the arrangement is limited, and to cover the vacuum heat insulation panel widely with one vacuum heat insulation panel.

  Moreover, in the refrigerator of the said patent document 3, it has a 2nd top | upper surface part and a 2nd back surface part which formed the machine room which accommodates a compressor and a machine room fan, a 2nd top | upper surface part and a 2nd back surface part A groove is provided in the cross-section of the vacuum heat insulation panel so that it can be bent at the joint portion, and this vacuum heat insulation panel is bent at 90 ° from the groove and disposed across the second top surface portion and the second back surface portion. . As a result, it can be widely covered with a single vacuum insulation panel, and the sound and vibration generated by the compressor and machine room fan are sound-insulated and attenuated to reduce noise, and the heat generated from the compressor and the like is stored in the cabinet. The intrusion can be suppressed.

JP 2001-336691 A JP 2004-11708 A JP 2006-125686 A

  However, in any of the refrigerators of Patent Documents 1 to 3, since the groove portion is provided in the vacuum heat insulating panel, there is a problem that the thickness of the core material in the groove portion is reduced and heat leakage from the groove portion is increased. Was. Further, in the refrigerators of Patent Documents 1 and 3, the core material is cut in the outer cover material by cutting the groove into the core material through the outer cover material. There was a possibility that the heat insulation performance could be deteriorated without securing the voids.

  The objective of this invention is providing the vacuum heat insulation panel and refrigerator which can prevent the heat leak from the bending part of a vacuum heat insulation panel, suppressing the influence of a heat bridge by the area increase of a vacuum heat insulation panel.

  In order to achieve the above object, a first aspect of the present invention comprises: a core material comprising a fiber assembly; and an outer cover material that covers the core material and seals the inside by reducing the pressure. Has a resilience with respect to the compression direction, utilizing the resilience with respect to the compression direction of the core material, and a three-dimensional shape in which the reduction of the plate thickness is suppressed by suppressing the buckling and cracking of the inner part of the bent part or the uneven part; The vacuum insulation panel is characterized by the above.

  A more preferable specific configuration example in the first aspect of the present invention is as follows.

  (1) The vacuum heat insulation panel is bent without forming a groove on the panel surface.

  (2) It has an inner packaging material made of a synthetic resin film that covers and compresses and seals the core material, and the outer jacket material covers the core material and the inner packaging material and seals the interior by reducing the inside.

  Moreover, the 2nd aspect of this invention is the refrigerator which comprised the heat insulation box body by arrange | positioning a vacuum heat insulation panel in the space formed with an outer box and an inner box, and filling the said space with the foam heat insulating material. The vacuum heat insulation panel comprises a core material made of a fiber assembly, and a covering material that covers the core material and seals the inside by reducing the pressure, and the core material has resilience in the compression direction, Using the resilience to the compression direction of the core material, a three-dimensional shape in which the reduction of the plate thickness is suppressed by suppressing buckling and cracking of the inner part of the bent portion or the uneven portion, and the three-dimensional shape of the outer box or the inner box It is in the refrigerator characterized by installing the said vacuum heat insulation panel along the location of a shape.

  According to the vacuum heat insulation panel and refrigerator of this invention which concerns, the heat leak from the bending part of a vacuum heat insulation panel can be prevented, suppressing the influence of a heat bridge by the area increase of a vacuum heat insulation panel.

It is a front view of the refrigerator of 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is the B section enlarged view in FIG. It is the C section enlarged view in FIG. It is sectional drawing which shows the basic shape of the vacuum heat insulation panel in FIG. It is a cross-sectional view of the refrigerator of the second embodiment of the present invention. It is a longitudinal cross-sectional view of the refrigerator of 3rd Embodiment of this invention. It is XX sectional drawing of FIG. It is a longitudinal cross-sectional view which shows the principal part of the refrigerator of 4th Embodiment of this invention. It is a perspective view explaining the integration state of the vacuum heat insulation panel of the refrigerator of 5th Embodiment of this invention. 6 is a longitudinal sectional view of a refrigerator according to Comparative Example 1. FIG. It is a longitudinal cross-sectional view of the refrigerator of the comparative example 2.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.

(First embodiment)
The refrigerator of 1st Embodiment of this invention is demonstrated using FIGS. 1-5.

  First, the whole structure of the refrigerator 1 of this embodiment is demonstrated, referring FIG.1 and FIG.2. FIG. 1 is a front view of a refrigerator provided with the present embodiment, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  The refrigerator 1 is provided with the heat insulation box 20 and the heat insulation doors 6-9 as main components. The heat insulation box 20 is composed of a top surface, a bottom surface, both side surfaces, and a back surface, and has a box shape with an open front surface. And as shown in FIG. 2, the heat insulation box 20 has the refrigerator compartment 2, the ice storage compartment 3, the switching room, the freezer compartment 4, and the vegetable compartment 5 in this order from the top.

  The heat insulating doors 6 to 9 are doors that close the front opening portions of the respective chambers 2 to 5. Refrigerating room doors 6a and 6b, ice storage room door 7a, upper freezing room door 7b, lower freezing room door 8 and vegetable room door 9 are arranged corresponding to each of chambers 2-5. The refrigerator compartment doors 6a and 6b are double doors that rotate around the hinge 10, and all the doors other than the refrigerator compartment doors 6a and 6b are drawer type doors. When these drawer type doors 7 to 9 are pulled out, the containers constituting each chamber are pulled out together with the doors. Each door 6 to 9 is provided with a packing 11 for sealing the heat insulating box 20. This packing 11 is attached to the indoor side outer periphery of each door 6-9.

  Moreover, between the refrigerator compartment 2, the ice making chamber 3a, and the upper stage freezer compartment 3b, the heat insulation partition 12 for partition heat insulation is arrange | positioned. The heat insulating partition 12 is a heat insulating wall having a thickness of about 30 to 50 mm, and is made of a single material such as a styrofoam, a foam heat insulating material (for example, urethane foam), a vacuum heat insulating panel, or a combination of a plurality of heat insulating materials. Yes. In addition, since the temperature zone is the same between the ice making chamber 3a and the upper freezing chamber 3b and the lower freezing chamber 4, a partition member 13 that forms a packing receiving surface is provided instead of a heat insulating partition that performs heat insulation. Between the lower freezer compartment 4 and the vegetable compartment 5, the heat insulation partition 14 for partition heat insulation is provided. This heat insulating partition 14 is a heat insulating wall of about 30 to 50 mm, similar to the heat insulating partition 12, and each of such a styrofoam, a foam heat insulating material (for example, urethane foam), a vacuum heat insulating panel, etc. is used alone or a plurality of heat insulating materials are used. Made in combination. Insulation partitions are basically installed in partitions of rooms with different storage temperature zones such as refrigeration and freezing. In the present embodiment, the heat insulating partitions 12 and 14 are composed of a foamed polystyrene 33 and a vacuum heat insulating panel 50.

  In the heat insulation box 20, the storage compartments of the refrigerator compartment 2, the ice making compartment 3a and the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment 5 are partitioned from above. Is not particularly limited to this. The refrigerator doors 6a and 6b, the ice making door 7a, the upper freezer compartment door 7b, the lower freezer compartment door 8 and the vegetable compartment door 9 are also particularly limited in terms of opening and closing by rotation, opening and closing by drawer, and the number of divided doors. is not.

  The heat insulating box 20 includes a metal outer box 21 and a synthetic resin inner box 22, and a heat insulating portion is provided in a space formed by the outer box 21 and the inner box 22 to connect each storage chamber and the outside. Insulated. A vacuum heat insulation panel 50 is arranged along the inner side of the outer box 21 or the inner box 22, and a space other than the vacuum heat insulation panel 50 is filled with a foam heat insulating material 23 such as hard urethane foam to constitute a heat insulating portion. Reference numeral 50 is generally used to represent a vacuum heat insulation panel, and alphabetical suffixes are used after the reference numeral 50 to represent a vacuum heat insulation panel at a specific location.

  The outer box 21 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by welding a folded steel plate or a flat steel plate. The inner box 22 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by molding a synthetic resin plate.

  A cooler 28 is provided on the back side of the freezer compartments 3a and 4 in order to cool each room such as the refrigerator compartment 2, the freezer compartments 3a and 4 and the vegetable compartment 5 to a predetermined temperature. The cooler 28, the compressor 30, the condenser 31, and a capillary tube (not shown) are connected to constitute a refrigeration cycle. Above the cooler 28, a blower 27 that circulates the cool air cooled by the cooler 28 in the refrigerator and maintains a predetermined low temperature is disposed.

  An interior lamp 45 having a case 45a protruding toward the foam heat insulating material 23 is installed on a part of the top surface of the inner box 22, so that the interior when the refrigerator door is opened is bright and easy to see. As the interior lamp 45, an incandescent bulb, a fluorescent lamp, a xenon lamp, or the like is used. Since the thickness of the foam heat insulating material 23 between the case 45a and the outer box 21 is reduced due to the installation of the interior lamp 45, the vacuum heat insulating panel 50a is disposed in this portion to ensure the heat insulating performance. .

  A recessed step portion 40 for accommodating an electrical component 41 such as a control board or a power supply board for controlling the operation of the refrigerator 1 is formed at the rear part of the top surface of the heat insulating box 20. As a result, the top surface of the outer box 21 exhibits a three-dimensional shape due to the recessed step portion 40. The electrical component 41 is a self-heating component that generates a large amount of heat. The concave step portion 40 is provided with a cover 42 that covers the electrical component 41. The height of the cover 42 is arranged so as to be substantially the same height as the top surface of the outer box 21 in consideration of appearance design and securing the internal volume. When the height of the cover 42 protrudes from the top surface of the outer box, it is desirable to keep it within a range of 10 mm. Since the recessed step portion 40 is in a state where only the space for housing the electrical component 41 is recessed on the side of the foam heat insulating material 23, if the foam heat insulating material 23 is made thick to ensure the heat insulating performance of this portion, the internal volume is sacrificed. turn into. On the contrary, if it is going to secure internal volume, the thickness of the foam heat insulating material 23 between the recessed step part 40 and the inner case 22 will become thin, and heat insulation performance will worsen.

  From these things, in this embodiment, the vacuum heat insulation panel 50a is arrange | positioned in the surface at the side of the foam heat insulating material 23 of the recessed step part 40, and the heat insulation performance is strengthened. Specifically, a single three-dimensional vacuum heat insulation panel 50a is installed so that the vacuum heat insulation panel 50a straddles the case 45a of the interior light 45 and the electrical component 41.

  A machine room 15 is formed in the rear part of the bottom surface of the heat insulation box 20 over the entire width. A compressor 30 and a condenser 31 are disposed in the machine room 15. The compressor 30 and the condenser 31 are self-heating components that generate a large amount of heat. Therefore, in order to prevent heat from entering from the machine room 15 into the cabinet, a single three-dimensional vacuum heat insulation panel 50b is arranged on the projection surface toward the inner box 22 side.

  Next, the installation of the vacuum heat insulating panels 50a and 50b will be specifically described with reference to FIGS. 3 is an enlarged view of portion B in FIG. 2, and FIG. 4 is an enlarged view of portion C in FIG.

  As shown in FIG. 3, in the present embodiment, a meandering heat radiating pipe 60 that is in contact with the inside of the top surface of the outer box 21 located in front of the recessed step portion 40 is installed. The heat radiating pipe 60 is covered with an aluminum tape 60 a and fixed to the outer box 21. Thereby, the heat of the heat radiating pipe 60 is also transferred to the outer box 21 through the aluminum tape 60a.

  The recessed step portion 40 includes an inclined surface inclined from the rear portion of the top surface of the outer box 21 and sinking backward, and a horizontal bottom surface extending horizontally rearward from the inclined surface. That is, the top surface of the outer box 21 has a three-dimensional shape including a front horizontal plane, an inclined plane, and a rear horizontal plane.

  On the other hand, the vacuum heat insulation panel 50a has a three-dimensional shape formed by bending two steps with substantially the same thickness, and includes a front horizontal part, an inclined part sinking backward from the front horizontal part, and a rear part from the inclined part. A rear horizontal portion extending horizontally. The three-dimensional shape of the vacuum heat insulating panel 50 substantially matches the three-dimensional shape of the top surface of the outer box 21.

The vacuum heat insulating panel 50 a is installed so as to straddle the heat radiating pipe 60 and the recessed step portion 40. Specifically, the entire surface of one side of the vacuum heat insulation panel 50a is attached to the top surface of the outer box 21 via an adhesive member 62 having flexibility and heat insulation. As a result, the heat of the heat radiating pipe 60 is not directly transferred to the vacuum heat insulating panel 50a, so that the heat insulating performance of the vacuum heat insulating panel 50a due to the heat of the heat radiating pipe 60 is suppressed over time, and the heat insulating performance can be maintained for a long time. it can. In the present embodiment, since the sheet material made of polyethylene foam with a double-sided pressure-sensitive adhesive is used as the adhesive member 62, the vacuum heat insulating panel 50a can be easily installed while closing the gap by the heat radiating pipe 60. As described above, since heat insulation is performed by the single vacuum heat insulation panel 50a across the heat radiating pipe 60 and the recessed step portion 40 in which the electric component 41 is disposed, the heat insulation in the portion where the self-heating component is disposed with a simple configuration. The performance can be greatly improved. Moreover, since it heat-insulates by the vacuum heat insulation panel 50a in the part close | similar to the high temperature part side, the heat leak from the heat radiating pipe 60 and the electrical component 41 to the store | warehouse | chamber can be reduced further.

  As shown in FIG. 4, a machine room 15 in which a compressor 30 and a condenser 31 are arranged is provided at the rear of the bottom surface of the heat insulating box 20. Due to the formation of the machine room 15, the bottom surface of the heat insulation box 20 includes a front horizontal portion, an inclined portion that rises rearward from the front horizontal portion, and a rear horizontal portion that extends horizontally backward from the inclined portion. It has a three-dimensional shape. Therefore, the bottom surfaces of the outer box 21 and the inner box 22 have a three-dimensional shape including a front horizontal part, an inclined part that rises rearward from the front horizontal part, and a rear horizontal part that extends horizontally backward from the inclined part. ing.

  On the other hand, the vacuum heat insulating panel 50b has a three-dimensional shape that is formed by two-stage bending with substantially the same thickness, and includes a front horizontal portion, an inclined portion that rises rearward from the front horizontal portion, and a horizontal portion that extends backward from the inclined portion. And a rear horizontal portion extending in the direction. The three-dimensional shape of the vacuum heat insulating panel 50 substantially matches the three-dimensional shape of the bottom surface of the inner box 22.

  Since this vacuum heat insulation panel 50b is installed so as to straddle the front horizontal portion, the inclined portion and the rear horizontal portion of the inner box 22, the heat insulation performance can be remarkably improved with a simple configuration, and the compressor Heat leakage from 30 and the condenser 31 to the interior can be reliably reduced.

  A cooler 28 is provided on the back of the interior located directly above the machine room 15, and a three-dimensional vacuum heat insulation panel 50 b is disposed between the cooler 28, the compressor 30 and the condenser 31. . In this way, the vacuum heat insulation panel 50b disposed between the cooler 28 having the lowest temperature and the compressor 30 having the highest temperature is formed into a three-dimensional shape, and the compressor 30 having one end portion as a heat generating portion and the condensation are formed. Since the position is away from the vessel 31, the influence of the heat bridge can be reduced. In addition, the vacuum heat insulation panel 50b located between the compressor 30 and the cooler 28 is provided with a notch for escaping a drain pipe (not shown). The presence or absence of this notch or its shape is not particularly limited.

  A part of the inner box side projection surface of the machine room 15 is provided with an internal temperature detection means (internal temperature detection sensor) 48 for detecting the internal temperature. This internal temperature detecting means 48 is housed in a protruding portion 48a formed by protruding the inner box 22 toward the foam heat insulating material 23 in order to eliminate the protrusion into the internal space. For this reason, the vacuum heat insulation panel 50b forms and coats the concavo-convex shape according to the shape of the protruding portion 48a. That is, the vacuum heat insulating panel 50b has a concave and convex shape in which a pair of dents and bulges are formed on the front and back surfaces in the plate thickness direction, and the plate thickness between the dents and the bulges is substantially the same as the other parts. The protruding portion 48a is housed in the concave and convex portion.

  The vacuum heat insulation panel 50 will be described in detail later, but since it does not use a binder as the core material, it has flexibility and can be easily folded without being processed into grooves, dents, and bulges. Can be formed. When the core material is molded with a binder to a certain thickness, a hardened layer with a high binder concentration is formed on the surface of the core material. The heat insulation performance deteriorates, such as a decrease or the core material being cut. Since the core material of this embodiment has a large repulsive force against the atmospheric pressure as well as flexibility, buckling does not occur in the inner part of the bend, and there is almost no decrease in the core material thickness in the bent part and the uneven shape. For this reason, a bent shape and an uneven shape can be obtained without deteriorating the heat insulating performance.

  Note that the vacuum heat insulating panel 50a on the top surface portion shown in FIG. 3 is obtained by performing bending twice using a bending jig to obtain a substantially Z shape. The vacuum heat insulating panel 50b in the bottom surface portion shown in FIG. 4 is obtained by processing a concavo-convex shape by a drawing press and obtaining a substantially Z shape by a bending jig.

  Next, the vacuum heat insulation panel 50 will be described more specifically with reference to FIG. FIG. 5 is a cross-sectional view showing the basic shape of the vacuum heat insulation panel 50 in FIG.

  The vacuum heat insulating panel 50 includes a core material 51, an inner packaging material 52 for holding the core material 51 in a compressed state, and an outer jacket having a gas barrier layer covering the core material 51 held in a compressed state by the inner packaging material 52. It is composed of a material 53 and an adsorbent 54.

  The core 51 is composed of a fiber assembly using glass wool having an average fiber diameter of 4 μm as a laminate of inorganic fibers not bonded or bound with a binder, and has flexibility and resilience in the compression direction. is doing. Use of a laminate of inorganic fiber material as the core material 51 is advantageous in terms of heat insulation performance because it can reduce the generation of gas from the core material 51. However, if necessary, ceramic fiber, rock wool, glass wool Other inorganic fibers such as glass fibers may be used.

  The inner packaging material 52 is made of a polyethylene film, which is a synthetic resin film having heat insulation properties that can be heat-welded, and covers the core material 51 and compresses and seals it. As the inner packaging material 52, a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, or the like may be used, as long as it has low hygroscopicity and can be heat-welded and generates less gas. The ear part of the inner packaging material 52 is disposed in the ear part of the outer covering material 53.

  As the covering material 53, a laminated film having a gas barrier layer formed by combining two or more films formed by forming a heat-welded layer and a gas barrier film is disposed on both surfaces of the vacuum heat insulating panel 50, and a laminated film having the same size. It is comprised by the bag shape which bonded together the part of fixed width from the ridgeline of this by heat welding. The inside of the jacket 53 is reduced in pressure and sealed.

  The laminate structure of the jacket material 53 is not particularly limited as long as it has gas barrier properties and can be thermally welded. In the present embodiment, a laminate composed of a three-layer structure of a surface layer, a gas barrier layer, and a heat welded layer. It is a film. Here, the surface layer is configured by providing a metal vapor deposition layer on a resin film having low hygroscopicity, the gas barrier layer is configured by providing a metal vapor deposition layer on a resin film having high oxygen barrier property, and the surface layer and the gas barrier layer are made of metal. It is bonded so that the vapor deposition layers face each other. Moreover, the heat welding layer uses the film with low hygroscopicity similarly to the surface layer. Specifically, the surface layer is a biaxially stretched polypropylene film with aluminum vapor deposition or a biaxially stretched polyethylene terephthalate film with aluminum vapor deposition, and the gas barrier layer is a biaxially stretched ethylene vinyl alcohol copolymer resin film or aluminum with aluminum vapor deposition. A biaxially stretched polyvinyl alcohol resin film with vapor deposition is used, and the heat-welded layer is an unstretched polyethylene film or an unstretched polypropylene film. In addition, a metal barrier or a resin film provided with a gas barrier film such as an inorganic layered compound or a resin gas barrier coating material as a gas barrier layer, or a polybutylene terephthalate film having a high oxygen barrier property, for example, is used as a heat welding layer. Also good.

  As described above, the purpose of placing the resin having low hygroscopicity on the surface layer and the heat welding layer is that the gas barrier layer film having high oxygen barrier property deteriorates due to moisture absorption. Sandwiching suppresses the moisture absorption amount of the entire laminate film. Thereby, also in the evacuation process of the vacuum heat insulation panel 50, since the amount of moisture brought in by the jacket material 53 is small, the evacuation efficiency is greatly improved, leading to high performance.

  The laminate structure of the jacket material 53 is not particularly limited to a three-layer structure as long as it has moisture resistance, gas barrier properties, and heat-weldability, and includes a surface protective layer, a first gas barrier layer, and a second layer. A multi-layer structure in which a plurality of gas barrier layers are provided, such as a laminate film having a four-layer structure of a gas barrier layer and a heat welding layer, may be used. For example, as the surface protective layer, a film of polyamide, polypropylene, polyethylene terephthalate or the like, or a biaxially stretched film is preferable in consideration of gas barrier properties, hygroscopicity, and the like. As the first and second gas barrier layers, a biaxially stretched film provided with a gas barrier film made of metal, metal oxide, inorganic material, etc. is preferable. For example, polyethylene terephthalate, ethylene vinyl alcohol copolymer, polyvinyl alcohol There are films such as. The heat-welding layer is required to have strength at the time of heat-welding, but is preferably combined with, for example, a film such as polyethylene, polypropylene, polybutylene terephthalate such as low density, medium density, high density and linear low density. Each layer is bonded by a dry laminating method through a two-component curable urethane adhesive.

  The adsorbent 54 is for adsorbing moisture and gas in the jacket material 53, and uses a physical adsorption type synthetic zeolite. However, the material is not limited to this material, and other materials of the physical adsorption type, or a chemical reaction type adsorption type material may be used.

The vacuum heat insulation panel 50 of the present embodiment configured as described above uses a core member 51 having a thickness of 10 mm and a core member 51 density of about 250 (kg / m ³ ). As described above, the core material 51 is easy to bend because there is no binding of fibers by a binder or the like, and since there is almost no decrease in the thickness of the core material 51 due to the absence of a groove or the like in the bent portion, the heat insulating performance. There is no part that gets worse. By disposing the vacuum heat insulation panel 50a on the top surface portion of the heat insulation box 20, it is possible to reduce the heat intrusion into the cabinet by the electric component 41 and the heat radiation pipe 60 and further improve the heat radiation characteristics of the heat radiation pipe 50. Moreover, since the penetration | invasion into the warehouse of the heat | fever which generate | occur | produces from the compressor 30 and the condenser 31 can be suppressed by arrange | positioning the vacuum heat insulation panel 50b in the bottom face part of the heat insulation box 20, the heat insulation performance is not increased. Can be improved.

  The refrigerator provided with the vacuum heat insulation panel 50 of this embodiment is consumed in comparison with the refrigerator of Comparative Example 1 in which a plurality of plate-like vacuum heat insulation panels 50 are arranged on the top and bottom surfaces of the heat insulation box 20. It was confirmed that the amount of electric power can be reduced by about 2%. In addition, this comparative example 1 is a thing of the structure shown in FIG. 11, and is the same as this embodiment except having arranged several small plate-shaped vacuum heat insulation panels 50. FIG.

  Moreover, the refrigerator shown in FIG. 12 shows the refrigerator of Comparative Example 2 using a plate-like vacuum heat insulation panel 50 that has been grooved and bent. It is the same as that of the first embodiment, except that a plate-like vacuum heat insulation panel 50 is formed by grooving and bending the top surface and the bottom surface. In Comparative Example 2, the amount of power consumption was reduced by about 1% compared to Comparative Example 1, but it was found that the deterioration with time by the acceleration test tends to be large.

  According to the present embodiment, the vacuum heat insulation panel 50 with improved shape flexibility is obtained without processing the core material thickness such as a groove in a three-dimensionally shaped portion such as a bend, which is a conventional configuration. As disclosed in Patent Documents 1 to 3, there is no division of the core material due to processing such as heat leaks and grooves from the thickness reduction part of the core material, and the heat insulation performance is not deteriorated. It is possible to provide an energy saving refrigerator that is applied to a plurality of locations to effectively reduce the amount of heat leaking from the box and to increase the internal volume. That is, according to the present embodiment, by disposing the vacuum heat insulation panel 50 that can realize a three-dimensional shape without reducing the plate thickness on the inner box side projection surface of the self-heating component, the heat intrusion into the cabinet is suppressed. Because it was possible to place the box near the box corner, which could not be placed in the past, it is possible to adopt a vacuum insulation panel with a low area of heat bridge and a large area per sheet. Thus, it is possible to provide a refrigerator with high internal capacity and high energy saving without increasing the heat insulation thickness.

(Second Embodiment)
Next, the refrigerator of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 6 is a cross-sectional view of the refrigerator according to the second embodiment of the present invention. 6 is a cross-sectional view corresponding to the ZZ cross section of FIG. The second embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  In this second embodiment, the vacuum heat insulation panel 50c disposed on the back surface of the outer box 20 is widened in the width direction and is bent into a substantially U shape along the shape of the outer case back surface 21b to form a three-dimensional shape. 50c is attached to the inner side of the back surface of the outer box 21 with an aluminum tape 60a or the like so as to cover the heat radiating pipe 60. The vacuum heat insulation panel 50c has a shape that does not come into contact with the heat radiating pipe 60, and is disposed with a heat buffer member 63 made of a polyethylene foam sheet material interposed therebetween.

  In other words, the refrigerator 1 of the second embodiment is configured such that the back surface of the outer box 21 includes a back flat portion and a vertically long narrow back inclined portion that extends diagonally forward from both left and right sides thereof. The heat dissipating pipe 60 extends vertically in contact with the corner portion with the inclined portion. Then, the vacuum heat insulating panel 50c is bent and formed so as to straddle the back flat portion, the heat radiating pipe, and the back inclined portion, and a flexible three-dimensional shape is formed between the three-dimensional vacuum heat insulating panel 50c and the heat radiating pipe 60. A heat buffer member 63 made of a polyethylene foam sheet material having heat resistance and heat insulation properties is interposed.

  According to the second embodiment, by covering the heat radiating pipe 60 with the vacuum heat insulating panel 50c, as described in the first embodiment, the heat of the heat radiating pipe 60 can be efficiently transmitted to the outer plate back surface 20a. It can improve heat dissipation and contribute greatly to energy saving. In particular, since the back inclined portion has a vertically long thin width, when an independent vacuum heat insulation panel is applied to this portion, the ratio of the length of both side end portions of the vacuum heat insulation panel to the total length is Large, the influence of the heat bridge of the vacuum insulation panel becomes extremely large. Therefore, even if an expensive vacuum heat insulation panel is independently applied to this portion, it has not been possible to improve the heat insulation performance commensurate with it. On the other hand, in this 2nd Embodiment, the vacuum heat insulation panel used in 1st Embodiment is not increased without increasing the number of both-ends parts by expanding the vacuum heat insulation panel 5c which covers a back flat part, and making it a solid shape. The area can be enlarged by about 30%.

  In Embodiment 2, the amount of power consumption can be reduced by about 4% compared to Comparative Example 1 that does not include the vacuum heat insulation panel on the back inclined portion, and the effectiveness for energy saving can be confirmed.

(Third embodiment)
Next, the refrigerator of 3rd Embodiment of this invention is demonstrated using FIG.7 and FIG.8. FIG. 7 is a longitudinal sectional view of a refrigerator according to a third embodiment of the present invention, and FIG. 8 is an XX sectional view of FIG. FIG. 7 is a cross-sectional view taken along the line AA of FIG. The third embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  In the refrigerator 1 of the third embodiment, the length of the heat radiating pipe 60 is extended by disposing a meandering heat radiating pipe 60 on the back surface and inside of both side surfaces of the outer box 21 in order to increase the heat radiation efficiency. The heat dissipation area is increased. The heat-dissipating pipe 60 is covered with a substantially U-shaped portion as a three-dimensional shape in which approximately U-shaped uneven portions are provided at two locations on a part of the vacuum heat insulating panels 50d and 50e by bending. These vacuum heat insulation panels 50d and 50e have the same outer shape after bending as that of the first embodiment, and are disposed by adhering portions that are in contact with the inner surface of the outer box rear surface 21b other than the substantially U-shaped portion. In this third embodiment, the vacuum heat insulation panels 50d and 50e are arranged in consideration of the flow direction at the time of urethane injection, and the heat radiating pipe 60 and the vacuum heat insulation panel 50c fixed inside the back surface of the outer box 21 with aluminum tape. The foamed urethane is filled in between. Thereby, the heating of the vacuum heat insulation panel 50c by the heat radiating pipe 60 can be prevented without interposing the heat buffer member 63.

  In the third embodiment, the amount of power consumption can be reduced by about 4% with respect to the comparative example 1 that does not have the meandering heat radiation pipe 60 on the back surface, and the energy saving effectiveness due to the improvement of the heat radiation performance can be confirmed.

(Fourth embodiment)
Next, the refrigerator of 4th Embodiment of this invention is demonstrated using FIG. FIG. 9 is a longitudinal sectional view showing a main part of the refrigerator according to the fourth embodiment of the present invention. FIG. 9 corresponds to FIG. The fourth embodiment is different from the first embodiment in the following points, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  The refrigerator of this 4th Embodiment adds the function which opens the drawer door 9 of the vegetable compartment 5 electrically. A drive unit 70 for electrically opening the drawer door 9 and a connecting means 71 for connecting the drawer door 9 are provided, and a switch 72 for opening the drawer door 9 is disposed on the front surface of the drawer door 9. The drive part 70 of the drawer door 9 is arranged on the bottom surface of the inner box 22 and protrudes toward the foam heat insulating material 23 from the viewpoint of securing the internal volume. Therefore, the foam insulation between the drive part 70 and the outer box 21 is provided. The thickness of the material 23 will decrease. Therefore, in order to suppress the deterioration of the amount of heat leakage in this portion, the vacuum heat insulation panel 50f formed in a three-dimensional shape so as to cover the case of the drive unit 70 is disposed. Since the drive unit 70 is made of a resin case having a relatively complicated shape, a heat buffer member 63 having flexibility and heat insulation is disposed between the drive unit 70 and the vacuum heat insulation panel 50f. The electric drawer door is not limited to the vegetable room, but may be in the freezer room.

(Fifth embodiment)
Next, the refrigerator of 5th Embodiment of this invention is demonstrated using FIG. FIG. 10 is a perspective view for explaining an assembled state of the vacuum heat insulation panel of the refrigerator according to the fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  In the refrigerator 1 of the fifth embodiment, a vacuum heat insulation panel 50 having a three-dimensional shape or a notch in a part of the core material is disposed on each of the top surface, both side surfaces, the back surface, and the bottom surface of the heat insulation box 20. Is. The same vacuum insulation panel 50a as used in the first embodiment is used on the top surface, a pentagonal plate-like vacuum insulation panel 50j in which one corner portion of the core material is chamfered on the side surface, and the third embodiment on the back surface. Like the form, the vacuum heat insulation panel 50e was bent into a substantially U shape along the shape of the outer plate back surface 21b, and the same vacuum heat insulation panel 50d as used in the second embodiment was used on the bottom surface.

  By these, the core material area of all the vacuum heat insulation panels arrange | positioned on each surface of the heat insulation box 20 can be enlarged. In the fifth embodiment, it was confirmed that the power consumption can be reduced by about 6% compared to the first embodiment.

  The configuration and effects according to the above-described embodiment are summarized as follows.

  In a refrigerator in which a heat insulating material is arranged in a space formed by an outer box and an inner box, at least two surfaces among a top surface, a side surface, a back surface, and a bottom surface (including an inclined portion toward the back side) constituting the box body By disposing the vacuum heat insulation panels formed into three-dimensional shapes, it is possible to efficiently insulate, for example, portions where a large amount of heat is generated, such as a compressor.

  In addition, a heat insulating material is disposed in a space formed by the outer box and the inner box, the control board is housed in a recessed step provided on the rear surface of the top surface of the outer box, and the compressor, the condenser, and the like are In the refrigerator arranged at the lower back of the box, a control board is provided by arranging three-dimensional vacuum heat insulation panels on the inner box side projection surface of the control board and the inner box side projection surfaces of the compressor and the condenser, respectively. It is possible to suppress the heat generated from the compressor, the condenser, and the like from entering the cabinet, and to improve the heat insulation performance of the refrigerator box.

  Further, by disposing a heat insulating material in a space formed by the outer box and the inner box, and in a refrigerator having at least a cooler and a compressor, a vacuum heat insulating panel is disposed between the cooler and the compressor. The heat intrusion from the heat generating part to the low temperature part for cooling the refrigerator can be effectively suppressed, and the heat insulating performance of the refrigerator box can be improved as described above.

  Further, a heat insulating material is disposed in a space formed by the outer box and the inner box, a heat radiating pipe disposed so as to be in contact with the inner surface of the outer surface of the outer box, a control board on the back side of the outer surface of the outer box, Provided with a concave step for storing self-heating parts such as electric parts such as a power supply board, and the compressor and condenser are arranged at the lower back of the outer box, and at least the temperature inside the box is detected at the bottom of the inner box In a refrigerator in which a protruding part is formed on the outer box side for attaching means, etc., a substantially Z-shaped three-dimensional vacuum heat insulation panel is arranged so as to straddle the projection surface of the heat radiating pipe and the concave step part to the inner box side. Also, a pair of depressions and bulges are formed on the front and back surfaces of at least a part of the thickness direction so as to straddle the projection surface of the compressor and the condenser on the inner box side and the bottom surface of the inner box. And the thickness between the dent and the bulge is Since the three-dimensional vacuum heat insulation panels are almost the same, heat generated from self-heating parts such as control boards, power supply boards, compressors and condensers, and heat from the heat radiating pipes installed on the ceiling In addition to suppressing entry into the cabinet, heat can be radiated efficiently with respect to the heat radiating pipe, and a refrigerator considering energy saving can be provided.

  Further, a three-dimensional vacuum heat insulation panel is arranged along the shape of the outer box or the inner box on the top, back, and bottom of the outer box, and the side surface is any of a rectangular plate shape, a notch shape, and a three-dimensional shape. Since this vacuum insulation panel is arranged, it can be placed in a three-dimensional shape or notch shape, etc. even in parts where the vacuum insulation panel could not be placed due to the placement of parts etc. The heat insulation performance can be dramatically improved.

Further, in the refrigerator in which a heat insulating material is arranged in a space formed by the outer box and the inner box, the heat radiating pipe arranged so as to be in contact with the inner surface of the outer box and the rear side of the outer box top surface part is controlled. Provided with a concave step for storing self-heating parts such as electric parts such as a board and a power supply board, and a three-dimensional shape bent so as to straddle the projection surface to the inner box side of the heat radiating pipe and the concave step A vacuum heat insulation panel is arranged, and a three-dimensional vacuum heat insulation panel that is folded so as to straddle the heat radiating pipe arranged so as to contact the inner surface of the rear surface of the outer box is arranged, and each vacuum heat insulation panel has a different three-dimensional shape. Since the heat buffer member is sandwiched between the vacuum insulation panel and the heat radiating pipe, the heat of the heat radiating pipe is not directly transmitted to the vacuum heat insulation panel. Sutra Suppressing degradation, it is possible to maintain the insulation performance for a long period of time. In addition, since the area per vacuum insulation panel can be increased by adopting a three-dimensional shape that straddles the heat radiating pipe, the effect of heat bridge on the jacket material is reduced and the insulation performance is advantageous. The heat insulation performance can be improved without increasing the thickness of the heat insulating material between the inner box and the inner box.
In addition, a drawer door having a plurality of doors on the front surface of the outer box and having an electric unit that opens or closes at least at the bottom is electrically opened or closed, and is arranged on the inner box bottom surface heat insulating material side. In the refrigerator arranged with the drive part of the unit protruding, a three-dimensional vacuum heat insulation panel is arranged to cover the drive part, so that the drive part of the electric unit protrudes from the bottom of the outer box. The insulation performance can be significantly improved by covering the thin insulation portion with a three-dimensional vacuum insulation panel. In addition, it also has the effect of insulating the operation sound generated from the drive part.

  The vacuum heat insulation panel comprises a core material which is temporarily compressed and sealed by covering a fiber laminate having resilience in at least the compression direction with an inner bag made of a synthetic resin film, and at least a heat-welded layer and a gas barrier film. A laminate film having a gas barrier layer formed by combining two or more layers of synthetic resin films thus formed is composed of an outer cover material in which the heat-welding layers face each other and end portions are welded, and the ear portion of the inner bag is Since it is placed in the ear part of the jacket material, and the inside of the jacket material is sealed by depressurization after releasing the sealing of the inner bag, it is characterized by good recyclability because it does not contain a binder. have.

  Further, the three-dimensional shape of the vacuum heat insulating panel is a shape having a concavo-convex portion in the direction of bending or plate thickness, and the plate thickness of the fold portion or the concavo-convex portion is substantially the same as the plate thickness of other portions. Therefore, the heat insulation performance of the vacuum heat insulation panel can be exhibited efficiently and the energy saving performance of the refrigerator is improved because there is no deterioration of the heat insulation performance because there is no reduction in the thickness of the bent portion or the like. Since the core material has a resilience to the compression direction and uses a fiber assembly without a hardened layer of a binder or the like, it is not cracked or crushed even if subjected to bending or uneven processing, and the plate before processing It can be almost the same as the thickness. For example, in order to bend a core material in which inorganic fibers are made into a sheet-like molded body as in Patent Document 1, it is necessary to process a groove serving as a base point of bending, but the vacuum heat insulating panel of this embodiment is Since the core material is not molded, it has flexibility and can be easily bent in an approximately L shape, an approximately Z shape, or a shape in which a dent and a bulge are partially paired. It can be molded relatively easily. Since processing of a groove or the like is not required in the bent portion, there is no portion where the core material thickness is reduced, and there is no portion where the heat insulation performance is deteriorated. As a method and means for forming these three-dimensional shapes, it is desirable to sequentially bend rather than simultaneously bend a plurality of locations for bending at two or more locations in order to reduce distortion in the film.

  In the present invention, the self-heating component means that the temperature rises to a high temperature during operation of the refrigerator, such as a condenser, a heat radiating pipe, etc., in addition to an electric component such as a control board and a power supply board, and a compressor. Although parts are shown, it is not limited to these.

  DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Refrigeration room, 3a ... Ice making room, 3b ... Upper stage freezing room, 4 ... Lower stage freezing room, 5 ... Vegetable room, 6a ... Refrigeration room door, 6b ... Refrigeration room door, 7a ... Ice making room door, 7b ... upper freezer compartment door, 8 ... lower freezer compartment door, 9 ... vegetable compartment door, 10 ... door hinge, 11 ... packing, 12 ... heat insulation partition, 13 ... partition member, 14 ... heat insulation partition, 15 ... machine room, 20 DESCRIPTION OF SYMBOLS ... Heat insulation box, 21 ... Outer box, 22 ... Inner box, 23 ... Foam insulation, 27 ... Blower, 28 ... Cooler, 30 ... Compressor, 31 ... Condenser, 33 ... Expanded polystyrene, 40 ... Concave step , 41 ... electric parts, 42 ... cover, 45 ... inside lamp, 45a ... case, 48 ... inside temperature detecting means, 48a ... extrusion part, 50, 50a, 50b, 50c, 50d, 50e, 50f, 50g, 50x ... Vacuum insulation panel, 51 ... Core material, 52 ... Inner packaging material, 53 ... Coating material 54 ... adsorbent, 60 ... radiator pipes, 60a ... aluminum tape, 62 ... bonding member, 63 ... thermal buffer, 70 ... drive unit, 71 ... connecting unit, 72 ... switch.

Claims (4)

A core material made of a fiber assembly, and a jacket material that covers the core material and seals the inside by reducing the pressure,
The core material has resilience in the compression direction, and the reduction in plate thickness is suppressed by using the resilience in the compression direction of the core material to suppress buckling and cracking of the inner part of the bent portion or the uneven portion. A vacuum insulation panel characterized by a three-dimensional shape.   The vacuum heat insulation panel according to claim 1, wherein the vacuum heat insulation panel is bent without forming a groove on the panel surface.   An inner packaging material comprising a synthetic resin film that covers and compresses and seals the core material, and the outer jacket material covers the core material and the inner packaging material and is sealed by reducing the inside. The vacuum insulation panel according to 1 or 2. In the refrigerator in which the heat insulation box is configured by placing the vacuum heat insulation panel in the space formed by the outer box and the inner box and filling the space with the foam heat insulating material,
The vacuum heat insulation panel includes a core material made of a fiber assembly, and a jacket material that covers the core material and seals the inside by reducing the pressure,
The core material has resilience in the compression direction, and the reduction in plate thickness is suppressed by using the resilience in the compression direction of the core material to suppress buckling and cracking of the inner part of the bent portion or the uneven portion. A three-dimensional shape
The said heat insulation panel was installed along the three-dimensional location of the said outer box or the said inner box. The refrigerator characterized by the above-mentioned.

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