JP2010276308A - Refrigerator having vacuum heat insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an influence of a heat bridge of a jacketing material of a vacuum heat insulating material, and to suppress a thermal influence by a radiation pipe by disposing the vacuum heat insulating material in a state of being separated from an outer box and an inner box at the entire length of at least two side sections observed from its thin thickness direction, and securing a constant distance to the radiation pipe disposed on an inner face of the outer box. <P>SOLUTION: In the refrigerator having the outer box 21, the inner box, the radiation pipe 90 disposed on the inner face of the outer box, and urethane foam and the vacuum heat insulating material 50 disposed between the outer box and the inner box, the vacuum heat insulating material 50 has the roughly-rectangular shape composed of a pair of short sides and a pair of long sides when observed from its thin thickness direction, the entire length part of one of the pair of sides and a partial length part of the other pair of sides have bent shapes disposed in a state of being separated from the outer box and the inner box, the bent part is bonded and fixed to the outer box 21, and a part of the vacuum heat insulating material disposed in a separating state keeps a constant distance from the radiation pipe 90 disposed on the inner face of the outer box 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator to which a vacuum heat insulating material is applied.

  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 the recent social background tends to work together and become a nuclear family, the need for large-capacity refrigerators has been increasing year by year due to an increase in the number of households that use weekend breaks to purchase ingredients. ing. Conventionally, in order to save energy, refrigerators have been put on the market in which the heat insulation performance is greatly improved by using a vacuum urethane heat insulating material together with a hard urethane foam as a heat insulating material for the refrigerator case. The vacuum heat insulating material has a heat insulating performance 10 times or more that of rigid urethane foam.

  As a conventional technique, vacuum insulating materials are generally arranged on a flat part on the outer box side of a refrigerator case, for example, in consideration of workability and the like. In some cases, the original heat insulation performance could not be sufficiently exhibited due to the heat bridge effect. In addition, high temperature parts such as a heat radiating pipe may be installed on the outer box side in consideration of energy saving, so that the heat bridge of the jacket material is promoted and a predetermined effect may not be obtained. Here, the heat bridge means that the vacuum heat insulating material installed in the refrigerator outer box having a high thermal conductivity passes through the outer box from the high temperature outside air, and further covers the outer covering material of the vacuum heat insulating material shown in FIG. This refers to the phenomenon of bridging hard urethane foam without passing through the core through the bent part formed at the end of the aluminum foil (for example, the flow from the inside of the refrigerator to the outside). The same meaning is used in the description of the present invention.

  Moreover, as a prior art shown by patent document 1, a vacuum heat insulating material is arrange | positioned on each surface of both sides | surfaces, a top surface, a back surface, a bottom surface, and a front surface, and the coverage of a vacuum heat insulating material is 50% with respect to the surface area of an outer box. Exceeding 80% or less to improve energy saving effect, vacuum insulation material is embedded in hard urethane foam between the outer box and inner box on the surface where the outer box surface area becomes higher than the outside air temperature, and the vacuum insulation material deteriorates over time The example of the refrigerator which is going to hold down is shown. In this patent document 1, it is described that the flow at the time of urethane injection is not hindered by disposing a urethane injection port on the space between the vacuum heat insulating material and the inner box.

  Moreover, as a prior art shown by patent document 2, the vacuum heat insulating material supported by the spacer fixed to the outer box side between an outer box and an inner box is arrange | positioned so that it may not contact an outer box and an inner box. In addition, a refrigerator is shown in which hard urethane foam is filled in the gap between the outer box and the vacuum heat insulating material and between the inner box and the vacuum heat insulating material. This spacer is arranged in parallel with the foaming direction of the rigid urethane foam, and has a bottom and a top that are in contact with the vacuum heat insulating material and the outer box, respectively, and the rigid urethane foam is located between the bottom and the outer box and between the top and the vacuum heat insulating material. There has been proposed a refrigerator provided with a flow path through which water can pass. In this prior art, when the heat radiating pipe is disposed on the outer box side, the heat radiating pipe is located between the top and the top of the spacer and does not contact the bottom of the spacer, that is, the vacuum heat insulating material. An example of a refrigerator in which the material is not easily affected by the heat of the heat radiating pipe is shown.

JP 2003-14368 A JP-A-2005-55086

  In general, as a characteristic of a vacuum heat insulating material, when used in a high temperature atmosphere, the heat insulating performance tends to be lower than when used in a low temperature atmosphere. Especially when used in contact with high-temperature parts such as heat radiating pipes, there is a risk of reducing the heat insulation performance of the vacuum heat insulating material, and due to the heat bridge effect of the jacket material, the heat insulation performance is reduced before the lifetime of the refrigerator is reached. There was a possibility of a significant decrease. In addition, in order to realize a large capacity, the insulation wall thickness of the refrigerator box must be reduced, so that the improvement of the insulation performance is required accordingly, so that the insulation performance of the vacuum insulation material is effectively demonstrated. Possible usage is a challenge.

  Moreover, in the structure of the conventional refrigerator shown by patent document 1, since the vacuum heat insulating material is arrange | positioned so that it may become the intermediate position of a rigid urethane foam (foaming urethane) with the urethane-made spacer provided in the outer case side, it is outside. Although the influence of the heat bridge of the workpiece can be reduced, in order to stabilize the posture of the vacuum heat insulating material, a large number of spacers must be arranged. In addition, if the spacer is too large, the flow of the rigid urethane foam is hindered, and if it is too small, there is a problem that it cannot withstand the foaming pressure.

  Also, since the urethane spacer is installed only between the outer box and the vacuum heat insulating material, when the rigid urethane foam (foamed urethane) rises in the foaming direction, there are many between the outer box and the vacuum heat insulating material due to flow resistance etc. When it flows, the vacuum insulation is peeled off from the spacer by the foaming pressure, and the vacuum insulation may come into contact with the inner box, etc., which may generate unfilled parts (voids) of urethane, which improves the insulation performance of the vacuum insulation. It was not able to fully demonstrate.

  Further, as shown in FIG. 14, when liquid hard urethane foam (foamed urethane) is injected from the injection hole d <b> 6 of the back surface 125, the hard urethane foam (foamed urethane) does not contact the vacuum heat insulating material 130 and the inner box 120. As described above, the space d7 is secured by the spacer 124, but it is considered difficult to secure the space d7 in order to cope with the recent increase in capacity.

  Moreover, the conventional refrigerator shown by patent document 2 has the spacer installed between the vacuum heat insulating material and an outer box, the bottom part adhere | attached on a vacuum heat insulating material, and the top part further adhere | attached on the outer box became alternate. However, there is an advantage that the urethane foam is easily filled between the vacuum heat insulating material and the outer box. Since the adhesive surface of the top portion and the outer box is a divided rectangular surface, the adhesive area is not sufficient and is installed only on the outer box side as in Patent Document 1, for example, the outer box and the vacuum heat insulating material. When the urethane foam rises quickly, the vacuum heat insulating material may be peeled off by the foaming pressure of the foamed urethane and may come into contact with the inner box, which may cause an unfilled portion (void).

  In the case of Patent Document 2, when the area of the vacuum heat insulating material is increased in order to further improve the heat insulating performance, it is considered that the vacuum heat insulating material is located in the projection plane of the urethane foam injection port. Since the urethane urethane flow path is obstructed at the time of urethane injection, there is a problem that the generation ratio of the unfilled portion (void) of the urethane foam is increased. In addition, when placing the vacuum heat insulating material on the outer box, it is pressed to stabilize the adhesion, but since the bonding surface of the spacer is an island-shaped rectangular surface, an uneven shape appears on the outer box surface, and the appearance There was the above problem.

  The present invention is installed in a state of being separated from the outer box and the inner box with respect to the substantially rectangular shape (which may be a square shape) vacuum heat insulating material in the state where the total length of at least two sides is separated from the outer box and the inner box. Is supported by a support member that is bonded and fixed to the outer box, ensuring a certain distance from the heat radiating pipe disposed on the inner surface of the outer box, reducing the heat bridge effect of the jacket material of the vacuum heat insulating material, and radiating heat The main purpose is to provide a refrigerator that suppresses the thermal effects of pipes.

In order to solve the above-described problems, the present invention employs the following configuration.
Installed between the outer box and the inner box, an outer box having a back surface, both side surfaces, and a top surface, an inner box facing the outer box, a heat radiating pipe disposed on the inner surfaces of both side surfaces of the outer box In the refrigerator provided with the foamed urethane and the vacuum heat insulating material, an inlet for injecting the urethane foam is provided on the back surface of the outer box, and the vacuum heat insulating material has a pair of short sides when viewed from the thin direction. It is a substantially rectangular shape composed of a pair of long sides, and the full length part of one of the pair of side parts and the partial long part of the other pair of side parts are separated from the outer box and the inner box It is set as the configuration installed in. Furthermore, the portion of the vacuum heat insulating material installed in the separated state is supported by a support member that is bonded and fixed to the outer box. Further, the vacuum heat insulating material is formed by bending at the other portion long portion excluding a portion of the other pair of side portions, and the other portion long portion formed by bending is bonded and fixed to the outer box. . Furthermore, the part of the said vacuum heat insulating material installed in the said separation state is set as the structure hold | maintained a fixed distance from the heat radiating pipe of the inner surface arrangement | positioning of the said outer box. Further, the support member is provided with a groove so that the heat dissipating pipe disposed on the inner surface of the outer box does not come into contact with the support member, and is bonded and fixed to the outer box at a portion without the groove. Furthermore, the portion of the vacuum heat insulating material closest to the injection port has a surface inclined with respect to the injection direction so as to guide and guide the injection of the urethane foam.

  Further, an outer box having a back surface, both side surfaces, and a top surface, an inner box facing the outer box, a heat radiating pipe disposed on inner surfaces of both side surfaces of the outer box, and between the outer box and the inner box In the refrigerator provided with the urethane foam and the vacuum heat insulating material installed in, the injection port for injecting the urethane foam is provided on the back surface of the outer box, and the projection surface of the injection port in the urethane foam injection direction is provided with the injection port. The vacuum heat insulating material corresponding to the projection surface is bent so that the vacuum heat insulating material is not located, and the bent portion formed by bending is bonded and fixed to the outer box, and the vacuum heat insulating material other than the bent portion is It is set as the structure installed in the separated state separated from the outer box and the said inner box. Furthermore, the vacuum heat insulating material formed by bending is configured such that the thickness of the bent portion does not decrease so as not to deteriorate the heat insulating performance using a core material made of a flexible fiber assembly. Further, the fiber aggregate is an inorganic fiber aggregate having an average fiber diameter of 1 to 10 μm, or an organic fiber aggregate having an average fiber diameter of 1 to 50 μm, both of which are binderless that does not bind or bond fibers together. It has a certain configuration.

  According to the present invention, when the vacuum heat insulating material is viewed from the thickness direction, the total length of at least two sides (a pair of short sides or a pair of long sides) of the pair of short sides and the pair of long sides. By arranging the parts so that they do not come into contact with the outer box and the inner box, the heat bridge of the jacket material can be suppressed, the heat insulating performance of the vacuum heat insulating material can be effectively exhibited, and the heat insulating performance should be good. Can do.

  In addition, when a heat radiating pipe is arranged in the outer box, the heat radiation pipe and the bent portion of the vacuum heat insulating material are kept at a constant distance by bending the full length part of at least two sides of the vacuum heat insulating material. It is possible to provide a refrigerator with good heat insulation performance in which the heat insulation performance is deteriorated due to the heat influence of the material and the heat bridge of the jacket material is reduced.

  In addition, even if the area of the vacuum heat insulating material is increased in order to enhance the heat insulating performance, the flow of the urethane foam is not hindered by bending the vacuum heat insulating material so as to be inclined with respect to the injection direction of the urethane foam. Since the urethane foam is uniformly and efficiently filled, it is possible to provide a refrigerator having good heat insulation performance and suppressing the amount of urethane foam used.

  Moreover, since the flow of the urethane foam is not hindered by bending the vacuum heat insulating material so as not to be positioned in the projected space of the injection direction of the urethane foam, the above-described effect can be obtained. In addition, when the vacuum heat insulating material is assembled, it can be easily assembled by the same work as the operation in which the conventional vacuum heat insulating material is attached to the outer box by bending in advance. Therefore, as in the conventional example, the number of assembling operations for arranging the spacers can be reduced, so that the cost can be reduced. In summary, according to the present invention, it is possible to provide a refrigerator with excellent cost performance, which has good heat insulation performance, that is, energy saving performance, and can reduce the number of assembly work steps.

It is a front view which shows the external appearance of the refrigerator to which the vacuum heat insulating material which concerns on the 1st Embodiment of this invention is applied. It is a longitudinal cross-sectional view of the refrigerator to which the vacuum heat insulating material which concerns on 1st Embodiment is applied, and is the sectional view of the AA line of FIG. It is sectional drawing of the vacuum heat insulating material used for 1st Embodiment. It is explanatory drawing which shows the injection | pouring direction and foaming direction of the foaming urethane used for the refrigerator which concerns on 1st Embodiment. It is a cross-sectional view of the refrigerator to which the vacuum heat insulating material according to the first embodiment is applied, and is a sectional view taken along the line ZZ in FIG. It is explanatory drawing which shows the structure which has arrange | positioned the vacuum heat insulating material which concerns on 1st Embodiment in relation with the position of a thermal radiation pipe. It is a sketch which shows the structure of the spacer used for 1st Embodiment. It is explanatory drawing which shows the structure which has arrange | positioned the vacuum heat insulating material which concerns on 2nd Embodiment in relation to the position of a thermal radiation pipe. It is the sketch and sectional drawing which show the structure of the spacer used for 2nd Embodiment. It is a longitudinal cross-sectional view in the refrigerator of the comparative example 1 in a prior art. It is explanatory drawing which shows the structure which has arrange | positioned the vacuum heat insulating material of the comparative example 1 in a prior art in relation to the position of a thermal radiation pipe. It is a figure which shows the modification structural example of the vacuum heat insulating material applied to the refrigerator which concerns on the 1st and 2nd embodiment of this invention. It is a figure which shows the other modified structural example of the vacuum heat insulating material applied to the refrigerator which concerns on the 1st and 2nd embodiment of this invention. It is a figure which shows arrangement | positioning of the vacuum heat insulating material regarding the prior art shown by patent document 1. FIG.

  A refrigerator to which a vacuum heat insulating material according to an embodiment of the present invention is applied will be described in detail below with reference to the drawings. 1 to 7 for the first embodiment of the present invention, FIGS. 8 and 9 for the second embodiment, and modifications in the first and second embodiments of the present invention. A configuration example will be described with reference to FIGS. 10 and 11 are diagrams showing a comparative example to be compared with the present embodiment, and FIG. 14 is a diagram showing a prior art with respect to the present embodiment.

“First Embodiment”
A refrigerator to which a vacuum heat insulating material according to a first embodiment of the present invention is applied will be described with reference to FIGS. FIG. 1 is a front view showing an external appearance of a refrigerator to which a vacuum heat insulating material according to a first embodiment of the present invention is applied. FIG. 2 is a longitudinal sectional view of a refrigerator to which the vacuum heat insulating material according to the first embodiment is applied, and is a cross-sectional view taken along line AA of FIG. FIG. 3 is a cross-sectional view of the vacuum heat insulating material used in the first embodiment. FIG. 4 is an explanatory diagram showing the injection direction and the foaming direction of urethane foam used in the refrigerator according to the first embodiment.

  FIG. 5 is a cross-sectional view of the refrigerator to which the vacuum heat insulating material according to the first embodiment is applied, and is a sectional view taken along the line ZZ in FIG. FIG. 6 is an explanatory view showing a configuration in which the vacuum heat insulating material according to the first embodiment is arranged in association with the position of the heat radiating pipe. FIG. 7 is a sketch showing the structure of the spacer used in the first embodiment.

  As shown in FIG. 2, the refrigerator 1 having this embodiment shown in FIG. 1 has a refrigerator compartment 2, an ice storage compartment 3 (an ice making compartment 3a and an upper freezer compartment 3b), a freezer compartment 4, and a vegetable compartment 5 from the top. is doing. The code | symbol of FIG. 1 is a door which obstruct | occludes the front-surface opening part of each chamber, All are drawer-type doors except the refrigerator compartment doors 6a and 6b and the refrigerator compartment doors 6a and 6b which rotate centering on the hinge 10 grade | etc., From the top. The ice making room door 7a, the upper freezing room door 7b, the lower freezing room door 8, and the vegetable room door 9 are arranged. When these drawer-type doors 6 to 9 are pulled out, the containers constituting each chamber are pulled out together with the doors. Each door 6-9 is provided with a packing 11 for sealing the refrigerator main body 1, and is attached to the indoor peripheral edge of each door 6-9.

  Moreover, the partition heat insulation wall 12 is arrange | positioned in order to carry out the partition heat insulation between the refrigerator compartment 2, the ice-making room 3a, and the upper stage freezer compartment 3b. The partition heat insulating wall 12 is a heat insulating wall having a thickness of about 30 to 50 mm, and is made of a styrofoam, a foam heat insulating material, a vacuum heat insulating material, or the like, and each is made of a single material or a combination of a plurality of heat insulating materials. 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 having a packing 11 receiving surface is provided instead of a partition heat insulating wall for partition heat insulation. A partition heat insulation wall 14 is provided between the lower freezer compartment 4 and the vegetable compartment 5 to insulate the partition. Like the partition heat insulation wall 12, it is a heat insulation wall of about 30 to 50 mm, which is also styrofoam or foam heat insulation. Made of wood, vacuum insulation, etc. Basically, partition heat insulation walls are installed in partitions of rooms with different storage temperature zones such as refrigeration and freezing.

  In addition, the storage compartment 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 is divided and formed in the box 20, respectively. The invention 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 drawers, and the number of divided doors. Not what you want.

  The box 20 includes an outer box 21 and an inner box 22, and a heat insulating part is provided in a space formed by the outer box 21 and the inner box 22 to insulate each storage chamber in the box 20 from the outside. Yes. A vacuum heat insulating material 50 is disposed in a space between the outer box 21 and the inner box 22, and a space other than the vacuum heat insulating material 50 is filled with a foam heat insulating material 23 such as rigid urethane foam. Although the vacuum heat insulating material 50 is demonstrated in FIG. 3, it is fixedly supported by the fixing member 70, the supporting member 80, etc. which are mentioned later.

  In addition, a refrigerator 28 is provided on the back side of the freezer compartments 3a and 4 in order to cool the refrigerator compartment 2, the freezer compartments 3a and 4 and the vegetable compartment 5 to a predetermined temperature. The refrigeration cycle is configured by connecting the cooler 28, the compressor 30, the condenser 31, and a capillary tube (not shown). 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. Moreover, as the heat insulating material which divides the refrigerator compartment 2 and ice making room 3a and the upper freezing room 3b of the refrigerator, and the freezing room 4 and the vegetable room 5, the heat insulating partitions 12 and 14 are arranged, respectively, and the expanded polystyrene 33 and the vacuum heat insulating material 50c are used. It is configured. The heat insulating partitions 12 and 14 may be filled with a foam heat insulating material 23 such as rigid urethane foam, and are not particularly limited to the foamed polystyrene 33 and the vacuum heat insulating material 50c.

  In addition, a concave portion 40 for accommodating an electrical component 41 such as a substrate for controlling the operation of the refrigerator 1 or a power supply substrate is formed in the rear portion of the top surface of the box 20, and a cover 42 that covers the electrical component 41. Is provided. 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. Although it does not specifically limit, when the height of the cover 42 protrudes from the top | upper surface of an outer box, it is desirable to set it in the range within 10 mm. Along with this, the recess 40 is disposed in a state where only the space for housing the electrical component 41 is recessed on the heat insulating material 23 side, so that the internal volume is inevitably sacrificed in order to ensure the heat insulating thickness. If the internal volume is increased, the thickness of the heat insulating material 23 between the recess 40 and the inner box 22 will be reduced.

  For this reason, the vacuum heat insulating material 50a is arrange | positioned in the heat insulating material 23 of the recessed part 40, and the heat insulation performance is ensured and strengthened. In the present embodiment, the vacuum heat insulating material 50a is a single vacuum heat insulating material 50a formed in a substantially Z shape so as to straddle the top surface and the electrical component 41. The cover 42 is made of a steel plate in consideration of a fire from the outside or a case where it is ignited for some reason. In addition, since the compressor 30 and the condenser 31 arranged at the lower back of the box 20 are components that generate a large amount of heat, in order to prevent heat from entering the inside of the box, a vacuum insulation is provided on the projection surface toward the inner box 22 side. The material 50d is arranged.

  About the vacuum heat insulating material 50, the structure is demonstrated using FIG. The vacuum heat insulating material 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 material 53 having a gas barrier layer covering the core material 51 held in a compressed state by the inner packaging material 52. , And an adsorbent 54. The jacket material 53 is disposed on both surfaces of the vacuum heat insulating material 50, and is configured in a bag shape in which portions of a certain width are bonded together by thermal welding from the ridge line of the laminate film having the same size.

  In the present embodiment, for the core material 51, glass wool having an average fiber diameter of 4 μm is used as a laminate of inorganic fibers that are not bonded or bound with a binder or the like. As for the core material 51, outgas is reduced by using a laminate of inorganic fiber materials (on the other hand, in the case of an organic material, gas is generated during evacuation or over time, and this gas is called outgas. ), Which is advantageous in terms of heat insulation performance, but is not particularly limited thereto, and may be, for example, ceramic fibers, rock wool, inorganic fibers such as glass fibers other than glass wool, and the like. Depending on the type of the core material 51, the inner packaging material 52 may be unnecessary.

  Moreover, about the core material 51, an organic resin fiber material other than an inorganic fiber material can be used. In the case of organic resin fibers, there are no particular restrictions on use as long as the heat resistant temperature is cleared. Specifically, it is common to fiberize polystyrene, polyethylene terephthalate, polypropylene, etc. to a fiber diameter of about 1 to 30 μm by a melt blown method or a spunbond method, Any fiberizing method may be used.

  In summary, the core fiber aggregate is an inorganic fiber aggregate with an average fiber diameter of 1 to 10 μm, or an organic fiber aggregate with an average fiber diameter of 1 to 50 μm, and does not bind or bond fibers. By adopting the above, it is possible to realize a vacuum heat insulating material that has the above-described flexibility and does not reduce the plate thickness.

  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 this embodiment, the surface protective layer, the first gas barrier layer, the second gas barrier layer, the heat It is a laminate film composed of four layers of welding layers, the surface layer is a resin film serving as a protective material, the first gas barrier layer is provided with a metal vapor deposition layer on the resin film, and the second gas barrier layer is a resin having a high oxygen barrier property. A metal vapor deposition layer is provided on the film, and the first gas barrier layer and the second gas barrier layer are bonded so that the metal vapor deposition layers face each other. For the heat-welded layer, a film having low hygroscopicity was used as in the surface layer.

  Specifically, the surface layer is a biaxially stretched film of polypropylene, polyamide, polyethylene terephthalate, the first gas barrier layer is a biaxially stretched polyethylene terephthalate film with aluminum deposition, and the second gas barrier layer is a two-layered film with aluminum deposition. An axially stretched ethylene vinyl alcohol copolymer resin film, a biaxially stretched polyvinyl alcohol resin film with aluminum deposition, or an aluminum foil was used, and the heat-welded layer was an unstretched polyethylene, polypropylene, or other film. The layer structure and material of the four-layer laminate film are not particularly limited to these. For example, as a first gas barrier layer or a second gas barrier layer, a metal foil or a resin film is provided with a gas barrier film made of an inorganic layer compound, a resin gas barrier coating material such as polyacrylic acid, or DLC (diamond-like carbon). Alternatively, for example, a polybutylene terephthalate film having a high oxygen barrier property may be used for the heat welding layer.

  The surface protective layer is a protective material for the first gas barrier layer, but in order to improve the vacuum exhaust efficiency in the manufacturing process of the vacuum heat insulating material, it is preferable to dispose a resin having a low hygroscopic property. In addition, the resin-based film other than the metal foil used for the second gas barrier layer usually has a gas barrier property that is significantly deteriorated by moisture absorption. While suppressing deterioration of gas barrier property, the moisture absorption amount of the whole laminate film is suppressed. As a result, even in the vacuum evacuation process of the vacuum heat insulating material 50 described above, the amount of moisture brought into the jacket material 53 can be reduced, so that the vacuum evacuation efficiency is greatly improved, leading to higher performance of heat insulation performance. . In addition, the lamination (bonding) of each film is generally performed by a dry lamination method through a two-component curable urethane adhesive, but the type of adhesive and the bonding method are particularly limited to this. It is not necessary to use any other method such as a wet laminating method or a thermal laminating method.

  Further, in the present embodiment, the encapsulating material 52 is a polyethylene film that can be thermally welded, and the adsorbent 54 is a physical adsorption type synthetic zeolite, but these are not limited to these materials. The inner packaging material 52 may be a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film or the like that has low hygroscopicity and can be thermally welded and has little outgas, and the adsorbent 54 adsorbs moisture and gas. Either adsorption or chemical reaction type adsorption may be used.

  Next, a method for injecting urethane and a method for foaming will be described with reference to FIG. As shown in FIG. 4A, urethane foam 23 is injected from the urethane injection hole 25 provided on the back surface 21c of the outer box 21 to the outer box front surface 21f side as shown in the injection direction 23a. Thereafter, as shown in FIG. 4B, the urethane foam starts to foam, rises in the foaming direction 23b on the back surface 21c side, and fills the outer box 21. In addition, urethane foam is made liquid by mixing a foaming agent into urethane. It is dropped in liquid form from the injection port 25, and the urethane foam rises upward from the gel-like bottom surface in the form of foam. It will solidify over time.

  Here, the specific structure of the refrigerator to which the vacuum heat insulating material according to the first embodiment is applied will be described with reference to FIGS. In the refrigerator 1 according to the present embodiment, among the vacuum heat insulating materials 50 used for the box body 20, the vacuum heat insulating materials 50 e arranged on the both side surfaces 21 e of the outer box 21 are placed substantially in the middle of the urethane foam (hard urethane foam) 23. This is a buried example. In addition, as shown in FIG. 2, the vacuum heat insulating materials 50 a and 50 b were directly attached to the outer boxes 21 a and 21 b for the top surface and the back surface, respectively, and the bottom surface was attached to the inner box 22 surface. As for the partition heat insulations 12 and 13, the vacuum heat insulating material 50c is illustrated in FIG. 2, but the vacuum heat insulating material 50c is not used in the first embodiment. As illustrated, there is no problem even if the vacuum heat insulating material 50c is used.

  In 1st Embodiment, in order to improve the heat dissipation of the refrigerant | coolant which is not shown in figure to the inner surface of the outer case 21e, the heat radiating pipe 90 was affixed with the aluminum tape 91. FIG. In order to further improve the heat dissipation, the length of the heat radiating pipe 90 was extended and arranged as shown in FIG. 6 (a), which is a view taken in the direction of arrow D in FIG. 6 (b).

  About the vacuum heat insulating material 50e, it arrange | positioned so that the distance d might be ensured so that the heat radiating pipe 90 might not be touched directly. This is because, as a characteristic of the vacuum heat insulating material 50, it is difficult to maintain heat insulating performance under a high temperature atmosphere. The vacuum heat insulating material 50e used in this embodiment has a shape in which the portion where the heat radiating pipe 90 is disposed is bent and formed to float from the outer box 21e, and the portion where the heat radiating pipe 90 is not disposed is attached to the outer box 21e. Attached with an adhesive (not shown).

  The arrangement of the vacuum heat insulating material will be described in more detail with reference to FIG. 6. When the vacuum heat insulating material 50 is viewed from the thin thickness direction (perpendicular to the paper surface of FIG. 6A), its short side (left and right of the paper surface of FIG. 6A) Direction side) and the long side part (similarly, the side part in the vertical direction of the drawing), the upper and lower two short sides are attached in a state of floating from the outer box side surface 21e, and the two right and left long sides are It is in contact with the side surface 21e at the center (not only the left and right sides (edges) are in contact with the side surface of the outer box, but also on the surface connecting these sides (edges). ). Since the upper and lower short sides (short edges) are floating, the influence of the heat bridge via the edges is avoided. When the end portions of the four sides of the vacuum heat insulating material are in contact with the side surface of the outer box, heat conduction wraps around the end portions, that is, a heat bridge is generated and the heat insulating performance is lowered. According to the configuration of the embodiment, the influence of the heat bridge can be reduced. In the configuration of FIG. 6, a heat bridge is generated through the central portion in the long side portion. Therefore, if only the central portion of the vacuum heat insulating material excluding the side portion of the vacuum heat insulating material 50 has a convex shape, the influence of the heat bridge. Can be avoided. However, this convex shape only at the center has a manufacturing difficulty. From the viewpoint of avoiding heat wraparound by the heat bridge, it is desirable to float all the peripheral portions of the vacuum heat insulating material.

  In the vacuum heat insulating material 50e located on the heat radiating pipe 90, a spacer 70 as shown in FIG. 7A or 7B is arranged in parallel with the foaming direction 23b of urethane foam (rigid urethane foam). The spacer 70 used in this embodiment has adhesive surfaces 70a and 70b that are continuous planes, and has an H-shaped cross-sectional shape having a columnar portion 70c that connects the adhesive surfaces 70a and 70b. The bonding surface 70a is bonded to the vacuum heat insulating material 50e, and the opposite bonding surface 70b is bonded to the outer box 21e. A through hole 70d for strengthening the adhesiveness to the urethane foam 23 was provided in the columnar portion 70c of the spacer 70. When the foamed urethane 23 flows into the through hole 70d, the spacer 70 is buried and firmly fixed. As for the through hole 70d, as shown in FIG. 7B, grooves 70e that do not penetrate may be provided on both surfaces of the columnar portion 70c. In some cases, the groove processing to the through hole 70d and the columnar portion 70c is omitted. May be.

  In this embodiment, ABS resin is used as the material of the spacer 70. ABS resin is selected because it is easy to injection mold, but AS (acrylonitrile styrene copolymer compound), PS (polystyrene) and other resins may be used as the material, and the molding method is also extruded. There are no particular limitations on molding or other methods.

  Moreover, about the vacuum heat insulating material 50 used for this embodiment, as a laminated structure of the jacket material 53, a surface layer is a biaxially stretched polypropylene film, a 1st gas barrier layer is a biaxially stretched polyethylene terephthalate film with aluminum vapor deposition, 2nd The gas barrier layer was a biaxially stretched ethylene vinyl alcohol copolymer resin film with aluminum vapor deposition, and the heat welded layer was an unstretched linear low density polyethylene film. For the core material 51, non-binder glass wool, which is an aggregate of glass fibers having an average fiber diameter of 4 μm, which is an inorganic fiber material, was used. Other materials are as described above.

  Regarding the incorporation of the vacuum heat insulating material 50e into the refrigerator 1, a synthetic rubber-based adhesive-type hot melt adhesive (not shown) is applied to the adhesive surface 70a of the spacer 70, and a plurality of the heat insulating materials 50e are preliminarily bent and formed at predetermined positions. After the spacer 70 is pasted, a hot melt adhesive is similarly applied to the adhesive surface of the vacuum heat insulating material 50e with the outer box 21e and the adhesive surface 70b of the spacer 70, and adhered to the inner surface of the outer box 21e. Arranged.

  As a result of injecting urethane foam (hard urethane foam) with the above specifications, the spaces between the outer box 21e and the vacuum heat insulating material 50e and between the inner box 22 and the vacuum heat insulating material 50e are not filled (voids). The part was not confirmed and it confirmed that the urethane foam 23 was filled uniformly.

  As a result of measuring the power consumption of the refrigerator of the first embodiment, when Comparative Example 1 to be described later is 100 (index), it becomes 97 (the smaller the numerical value represents high heat insulation performance), and the projection of the heat radiating pipe 90 It was confirmed that the heat insulation performance was improved by about 3% by covering the part with the vacuum heat insulating material 50e and arranging the full length part of at least two sides in the middle of the urethane foam 23.

“Second Embodiment”
A refrigerator to which a vacuum heat insulating material according to a second embodiment of the present invention is applied will be described below with reference to FIGS. 8 and 9. FIG. 8 is an explanatory view showing a configuration in which the vacuum heat insulating material according to the second embodiment is arranged in association with the position of the heat radiating pipe. FIG. 9 is a sketch and a cross-sectional view showing the configuration of the spacer used in the second embodiment. Here, FIG. 8 corresponds to FIG. 6 of the first embodiment, and FIG. 9 corresponds to FIG. 7 of the first embodiment. Since the configuration in the second embodiment is common except for the configuration shown in FIGS. 6 and 7 of the first embodiment, the description thereof is incorporated.

  As shown in FIG. 8 (b), the heat radiating pipe 90 is attached to the inner surface of the outer box 21e with an aluminum tape 91, and as shown in FIG. A vacuum heat insulating material 50e was disposed on the projection surface of the heat radiating pipe 90. The vacuum heat insulating material 50e was used in the form of a plate without being bent, and was disposed approximately in the middle of the urethane foam (hard urethane foam) 23 using a spacer 77.

  As for the spacer 77, as shown in FIGS. 9A and 9B, a groove 77c for escaping the heat radiating pipe 90 is provided on the adhesion surface 77b with the vacuum heat insulating material 50e. Other specifications are the same as those in the first embodiment. The spacer 77 has an H-shaped cross-sectional shape, one surface (the lower surface in the illustrated example in FIG. 9) is bonded to the vacuum heat insulating material 50, and the other surface (the upper surface in the illustrated example in FIG. 9) is the heat radiating pipe. A U-groove 77 is formed in a portion through which 90 passes, and a plane excluding the U-groove is bonded to the side surface 21e.

  As a result of injecting the urethane foam 23 with the above specifications, no unfilled part (void) part is confirmed in each space between the outer box 21e and the vacuum heat insulating material 50e and between the inner box 22 and the vacuum heat insulating material 50e. As in the first embodiment, it was confirmed that the urethane foam 23 was uniformly filled.

  As a result of measuring the power consumption of the refrigerator of the second embodiment, when Comparative Example 1 described later is 100 (index), it becomes 95, and the projected portion of the heat radiating pipe 90 is covered with the vacuum heat insulating material 50e, and the vacuum heat insulating material It was confirmed that the thermal insulation performance was improved by about 5% by arranging the entire 50e in the middle of the urethane foam 23.

“Comparative Example 1”
The refrigerator of the comparative example 1 which should be contrasted with the 1st and 2nd embodiment of this invention is demonstrated below, referring FIG. 10 and FIG. FIG. 10 is a longitudinal sectional view of the refrigerator of Comparative Example 1 in the prior art. FIG. 11 is an explanatory view showing a configuration in which the vacuum heat insulating material of Comparative Example 1 in the prior art is arranged in association with the position of the heat radiating pipe. This Comparative Example 1 shows a typical arrangement of vacuum heat insulating materials in the prior art (a vacuum heat insulating material is arranged on the inner surface of the outer box).

  As shown in FIG. 10 and FIG. 11, the vacuum heat insulating material 50e of the outer box 21e on both sides remains plate-shaped without being bent, and the inner surface of the outer box 21e without using the spacer 70. In addition, as in the prior art, it was directly attached to the inner surface of the outer box 21e with a hot melt adhesive, and the heat radiating pipe 90 was attached with an aluminum tape 91 around the vacuum heat insulating material 50e. The other specifications are the same as those in the first embodiment.

  As a result of filling urethane foam (hard urethane foam) with the above specifications, no unfilled part (void) part is confirmed between the vacuum heat insulating material 50e and the inner box 22, and the hard urethane foam is uniformly filled. It was confirmed. However, the power consumption of the refrigerator of Comparative Example 1 is 100 (index) as described above.

“Modified configuration example 1 of this embodiment”
Next, a modified configuration example 1 related to the refrigerator to which the vacuum heat insulating material according to the first and second embodiments of the present invention is applied will be described with reference to FIG. The vacuum heat insulating material 50e used in this modified configuration example 1 is arranged so as to form an inclined surface with respect to the injection direction 23a of the injection hole 25 of the urethane foam 23. Since the refrigerator of the modified configuration example 1 has a large internal volume, the heat insulation thickness is thin, and the vacuum heat insulating material 50e is placed in the projection plane of the injection hole 25.

  Therefore, when the urethane foam 23 is directed in the injection direction 23a, the vacuum heat insulating material 50e can be an obstacle. In this modified configuration example 1, the vacuum heat insulating material 50e is provided with an inclined surface so as not to hinder the flow of the urethane foam 23. The vacuum heat insulating material 50e was previously bent into a shape as shown in the figure, and arranged using the spacer 70 in the same manner as in the second embodiment.

  In addition, a two-component curable urethane foam (a mixture of urethane and a foaming agent) is directly dropped in a liquid state on a part of the surface of the inner box 22 serving as a projection surface of the vacuum heat insulating material 50e, and is substantially ball-shaped. The support members 80 foamed in the same manner were arranged in several places. When the inner box 22 in which the support member 80 is disposed is combined with the vacuum heat insulating material 50 attached to the outer box 21e by the spacer 70, the vacuum heat insulating material 50e is sandwiched between the spacer 70 and the support member 80. Can be held in.

  In addition, about the support member 80, you may arrange | position previously on the surface on the opposite side to the surface which has arrange | positioned the spacer 70 of the vacuum heat insulating material 50e. For the support member 80, in addition to urethane foam, a foam adhesive such as foam melt is directly applied to the inner box 22 or the vacuum heat insulating material 50e, or a foam heat insulating material such as styrofoam or rigid urethane foam formed into a block shape, etc. May be arranged in the inner box 22 or the vacuum heat insulating material 50e. A molded product made of a resin material or the like may be placed in advance in the inner box 22 by bonding or bonding. The other specifications are the same as those in the first embodiment.

  As a result of filling the urethane foam 23 with the above specifications, the urethane foam 23 injected from the injection hole 25 hits the inclined surface of the upper portion of the vacuum heat insulating material 50e shown in the figure, and is guided in the injection direction 23a along the inclined surface. Injected, no unfilled part (void) part is confirmed between the outer box 21e and the vacuum heat insulating material 50e and between the inner box 22 and the vacuum heat insulating material 50e, and the urethane foam is uniformly filled. It was confirmed. It was confirmed that the amount of urethane used could be reduced by about 2% with respect to Comparative Example 2 described later.

“Modified configuration example 2 of this embodiment”
Next, a modified configuration example 2 related to the refrigerator to which the vacuum heat insulating material according to the first and second embodiments of the present invention is applied will be described with reference to FIG. The vacuum heat insulating material 50e used in this modified configuration example 2 is arranged so as not to enter the projection plane of the injection hole 25 of the urethane foam 23. In the illustrated example of FIG. 13, the vacuum heat insulating material 50 e is previously bent into a shape as illustrated so that it does not enter the projection surface of any of the four injection holes 25. A part was adhered and fixed to the outer box 21e with an adhesive (not shown). In order to stabilize the posture of the vacuum heat insulating material 50e, the spacer 70 was disposed between the outer box 21e and the vacuum heat insulating material 50e and fixed with an adhesive (not shown). Further, the support member 80 is disposed in the same manner as in the modified configuration example 1 described above. The other specifications are the same as those in the first embodiment.

  In the above specifications, as a result of filling with urethane foam, the urethane foam 23 injected from the injection hole 25 can be injected without touching the vacuum heat insulating material 50e, the outer box 21e, and the inner box 22, and the outer box 21e and An unfilled portion (void) portion was not confirmed between the vacuum heat insulating material 50e and between the inner box 22 and the vacuum heat insulating material 50e, and it was confirmed that the hard urethane foam was uniformly filled. It was confirmed that the amount of urethane used can be reduced by about 3% with respect to Comparative Example 2 described later.

“Comparative Example 2”
The refrigerator of the comparative example 2 which should be contrasted with the 1st and 2nd embodiment of this invention is demonstrated below. In Comparative Example 2, the vacuum heat insulating material 50e is arranged in the middle of the urethane foam 23 by using the spacer 70 without bending the vacuum heat insulating material 50e in the above-described modified configuration example 2, and the injection hole 25 is projected. It arrange | positioned so that the vacuum heat insulating material 50e may be located in a surface. The other specifications are the same as those in the first embodiment.

  As a result of filling urethane foam with the above specifications, no unfilled part (void) part was confirmed between the outer box 21e and the vacuum heat insulating material 50e and between the inner box 22 and the vacuum heat insulating material 50e, and the hard urethane foam was It was confirmed that the filling was uniform. However, the result was that the amount of urethane used was larger than in the modified configuration example 1 and the modified configuration example 2 described above. The reason is that urethane foam collides with the vacuum heat insulating material in the vicinity of the injection hole and a smooth flow is not formed, so it is necessary to use a large amount of urethane foam. The amount of urethane used in Comparative Example 2 is 100 as described above.

  As described above, in the refrigerator to which the vacuum heat insulating material according to the embodiment of the present invention is applied, the heat radiating pipe 90 is disposed on the inner surface of the outer box 21e, and the heat radiating pipe 90 and By arranging the vacuum heat insulating material 50e so as not to come into contact with each other, a heat insulating performance was improved and a refrigerator capable of reducing power consumption was realized. In addition, from the viewpoint of reducing the cost of the refrigerator, while realizing a large capacity in a space-saving manner, the shape of the vacuum heat insulating material 50e has been devised so that the flow of the foamed urethane 23 is not hindered. In addition, loss due to flow resistance during foaming can be suppressed, which contributes to cost reduction.

  Further, in the refrigerator according to the present embodiment as shown in FIG. 6, when viewed from the thickness direction of the vacuum heat insulating material, the full length portion of at least two sides (short side and long side end) of the vacuum heat insulating material is substantially the same as that of urethane foam. By arranging in the middle (between the outer box and the inner box), it is possible to reduce the heat bridge effect peculiar to the vacuum heat insulating material, and to provide an energy saving refrigerator with good heat insulating performance. Also, as in the embodiment shown in FIGS. 12 and 13, the amount of urethane foam used is reduced by bending the vacuum heat insulating material on the projection surface of the urethane injection hole so as not to inhibit urethane flow. This is effective in reducing costs.

  In addition, even if a heat radiating pipe is placed in the projection plane of the vacuum heat insulating material, the heat radiation characteristics are greatly improved by adopting a spacer that can secure a distance that does not cause the heat insulating performance to deteriorate due to heat. Therefore, it is possible to provide a refrigerator that can realize more energy saving. The present invention can be widely applied not only to refrigerators but also to products, equipment, houses / buildings, and vehicles such as automobiles and trains that require heat insulating materials.

  It will be as follows if the characteristic on the structure and effect of a refrigerator to which the vacuum heat insulating material which concerns on this embodiment is applied repeatedly is abbreviated. In a refrigerator having urethane foam and a vacuum heat insulating material between the outer box and the inner box, having a foam urethane inlet on the back of the outer box, and having a heat radiating pipe on the inner surface of the outer box side surface, at least the vacuum heat insulating material Since the two sides are installed in a state where they are separated from the outer box and the inner box, the heat bridge effect of the vacuum heat insulating material can be reduced, and the heat effect of the heat radiating pipe can also be suppressed. Furthermore, since the full length part of at least 2 sides of a vacuum heat insulating material is arrange | positioned by the adhesive member or the supporting member so that a fixed space may be hold | maintained between an outer box and an inner box, respectively, it is conventional. A vacuum heat insulating material can be arrange | positioned with the working method similar to a refrigerator. Further, the vacuum heat insulating material is folded and formed so that at least the full length portions of the two sides facing each other are separated from the outer box and the inner box, and the vacuum heat insulating material other than the bent portion is bonded and fixed to the outer box. Therefore, the effect immediately above can be achieved (in this case, the part of the vacuum heat insulating material in the separated state is referred to as a bent part). Furthermore, the vacuum heat insulating material is disposed on the heat radiating pipe fixed to the outer box, and at least two full length parts facing each other are separated from the outer box so as to ensure a certain distance from the heat radiating pipe. Since it is bent and secured at a certain distance from the inner box, it is possible to reduce the thermal effect of the heat radiating pipe, and thus it is possible to suppress deterioration over time of the heat insulating performance of the vacuum heat insulating material. Furthermore, since the vacuum heat insulating material has an inclined surface with respect to the injection direction or the foaming direction of the urethane foam, even when the vacuum heat insulating material is disposed in the projection surface of the injection port of the urethane foam, the inclination is inclined. Since the flow direction of the urethane foam can be guided by the surface, it is possible to suppress the occurrence of unfilled portions (voids) due to the flow inhibition of the urethane foam.

  Further, in the present embodiment, in a refrigerator having urethane foam and a vacuum heat insulating material between the outer box and the inner box and having a urethane foam inlet on the back surface, a space in which the inlet is projected in the direction of urethane foam injection A vacuum heat insulating material is placed between the inner box and the inner box, and it is bent so that the vacuum heat insulating material is not located in the space projected in the injection direction of the urethane foam. Since it accumulates on the front side of the refrigerator and can stand up uniformly in the foaming direction, the occurrence frequency of unfilled portions (voids) can be reduced. Furthermore, the vacuum heat insulating material is a core material made of a flexible fiber assembly, an inner bag made of a synthetic resin film covering the core material, a jacket material having gas barrier properties, and a core material and a jacket material. It consists of an adsorbent that adsorbs gas and moisture generated from the core, and after the core material is filled with the adsorbent, covered with the inner bag and compressed, it is deaerated and sealed once, and then inserted into the jacket material Since the inner bag is released and sealed in a vacuum, the thickness of the bent portion does not decrease even if bending is performed, so it can cover a large area without deteriorating the heat insulation performance of the box, It is possible to greatly improve the heat insulation performance. Furthermore, the fiber aggregate of the core material is an inorganic fiber aggregate with an average fiber diameter of 1 to 10 μm, or an organic fiber aggregate with an average fiber diameter of 1 to 50 μm, and is binderless that does not bind or bond fibers together. Therefore, the vacuum heat insulating material which has the flexibility mentioned above and does not reduce the plate thickness can be realized.

1: refrigerator, 2: cold room, 3a: ice making room, 3b: upper freezer room, 4: lower freezer room, 5: vegetable room, 6a: cold room door, 6b: cold room door, 7a: ice room door, 7b : Upper freezer door, 8: Lower freezer door, 9: Vegetable room door, 10: Hinge for door, 11: Packing, 12, 14: Thermal insulation partition, 13: Partition member, 20: Box, 21: Outer box 21a: top plate, 21b: rear plate, 21d: bottom plate, 21e: side surface, 21f: front surface, 22: inner box, 23: heat insulating material, 23a: injection direction, 23b: foaming direction, 25: injection hole, 27: Blower, 28: Cooler, 30: Compressor, 31: Condenser, 33: Expanded polystyrene, 40: Recess, 41: Electrical component, 42: Cover,
50, 50a, 50b, 50c, 50d, 50e: vacuum heat insulating material, 51: core material, 52: enveloping material, 53: jacket material, 54: adsorbent, 70: spacer, 70a, 70b: adhesive surface, 70c: Columnar part, 71: Spacer, 71a, 71b: Adhesive surface, 72: Spacer, 72c: Inclined part, 73: Spacer, 75: Block material, 77: Spacer, 77c: Groove part, 80: Support member, 90: Radiation pipe, 91: Aluminum tape.

Claims (9)

Installed between the outer box and the inner box, an outer box having a back surface, both side surfaces, and a top surface, an inner box facing the outer box, a heat radiating pipe disposed on the inner surfaces of both side surfaces of the outer box In a refrigerator provided with a foamed urethane and a vacuum heat insulating material,
Provide an injection port for injecting the urethane foam on the back of the outer box,
The vacuum heat insulating material has a substantially rectangular shape composed of a pair of short sides and a pair of long sides as viewed from the thin direction,
The full length part of any one pair of side part and the partial length part of the other pair of side part are installed in the separated state separated from the said outer box and the said inner box. The refrigerator characterized by the above-mentioned. In claim 1,
The portion of the vacuum heat insulating material installed in the separated state is supported by a support member bonded and fixed to the outer box. In claim 1 or 2,
The vacuum heat insulating material is formed by bending at the other part length part excluding a part of the other pair of side parts, and the other part length part formed by bending is bonded and fixed to the outer box. refrigerator. In claim 1, 2, or 3, the inner surface of the box,
The portion of the vacuum heat insulating material installed in the separated state maintains a certain distance from the external heat radiating pipe. In claim 2,
The support member is provided with a groove so that a heat radiating pipe disposed on the inner surface of the outer box is not in contact with the support member, and is adhesively fixed to the outer box at a portion without the groove. In claim 1, 2 or 3,
The portion of the vacuum heat insulating material closest to the inlet has a surface inclined with respect to the injection direction so as to guide and guide the injection of the urethane foam. Installed between the outer box and the inner box, an outer box having a back surface, both side surfaces, and a top surface, an inner box facing the outer box, a heat radiating pipe disposed on the inner surfaces of both side surfaces of the outer box In a refrigerator provided with a foamed urethane and a vacuum heat insulating material,
Provide an injection port for injecting the urethane foam on the back of the outer box,
The vacuum heat insulating material corresponding to the projection surface is bent so that the vacuum heat insulating material is not located in the projection surface of the injection port in the urethane foam injection direction,
The refrigerator is characterized in that the bent portion formed by bending is adhered and fixed to the outer box, and a vacuum heat insulating material other than the bent portion is installed in a separated state separated from the outer box and the inner box. In claim 3 or 7,
The refrigerator is characterized in that the vacuum heat insulating material formed by bending is such that the thickness of the bent portion does not decrease so as not to deteriorate the heat insulating performance using a core material made of a flexible fiber assembly. In claim 8,
The fiber aggregate is an inorganic fiber aggregate with an average fiber diameter of 1 to 10 μm or an organic fiber aggregate with an average fiber diameter of 1 to 50 μm, both of which are binderless that do not bind or bond fibers together. A refrigerator characterized by.