JP5414751B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  In recent years, vacuum heat insulating materials have become indispensable from the viewpoint of energy saving in refrigerators.

  The vacuum heat insulating material is obtained by inserting a core material serving as a spacer into an outer packaging material having gas barrier properties, and sealing the interior by reducing the pressure.

  In addition, recent refrigerators tend to be larger due to needs such as enriching food and popularizing bulk purchases. As the refrigerator becomes larger, it is necessary to increase the size of the vacuum heat insulating material. However, since a large-scale manufacturing facility is required, the plate size of the vacuum heat insulating material cannot be easily increased. In addition, a large sized manufacturing equipment refers to the drying furnace etc. which remove the water | moisture content contained in the raw cotton of a vacuum heat insulating material. Increasing the size of the drying furnace not only causes a large equipment cost, but also causes an energy loss when manufacturing a vacuum insulating material of a small size.

  At present, each manufacturer sets the width of the vacuum insulation material to around 500mm, and if it exceeds that, the existing equipment cannot handle it.

  That is, with the increase in size and energy saving of the refrigerator, for example, when the width of the refrigerator is increased to 700 mm to 800 mm, it is difficult to dispose the vacuum heat insulating material on the back surface of the refrigerator.

  In order to cope with this, there is a proposal to manufacture a vacuum heat insulating material having a wide width by combining a plurality of core materials. For example, Japanese Patent Application Laid-Open No. 5-248592 (Patent Document 1) and Japanese Patent Application Laid-Open No. 7-332585 (Patent Document 2) are proposed.

JP-A-5-245852 JP-A-7-332585

  However, the plate-like core material shown in these patent documents is a compacted board solidified using an organic binder or a calcium silicate molded body.

  In addition, in these patent documents, when a plurality of them are combined to increase the width, the plate-shaped core material has a complicated shape in order to suppress the radiant heat that goes straight from the seam of the plate-shaped core material and escapes. Need to overlap.

  Then, an object of this invention is to provide the refrigerator provided with the vacuum heat insulating material which made the width | variety wide according to a large sized refrigerator, and suppressed the heat insulation performance fall.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned problems. For example, in a refrigerator provided with a heat insulating portion including a vacuum heat insulating material and a foam heat insulating material, the vacuum heat insulating material includes three layers of fiber assemblies. A plurality of fiber assemblies having 30 to 60 mm protruding portions stacked as described above, a core material combining the plurality of fiber assemblies so as to form a space between the respective protruding portions, and the core material are stored. The outer packaging material was compressed so that the space between the protrusions was filled.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator provided with the vacuum heat insulating material which made the width | variety wide according to a large sized refrigerator, and suppressed the heat insulation performance fall can be provided.

It is a longitudinal cross-sectional view of the refrigerator in embodiment of this invention. It is sectional drawing of the vacuum heat insulating material of FIG. It is explanatory drawing of the raw cotton before compression of the vacuum heat insulating material of FIG. 2, and pressure reduction. It is the figure which put the raw cotton of FIG. 3 in the outer packaging material, and decompressed. It is P section expansion explanatory drawing of FIG. It is a figure of the state which has arrange | positioned the raw cotton of FIG. 3 to the inner bag or the outer packaging material. It is a figure explaining arrangement | positioning of the raw cotton different from FIG. It is a cross-sectional view of the refrigerator in the embodiment of the present invention. It is explanatory drawing at the time of using two plate-shaped core materials compression-molded using the binder or the thermocompression bonding method, putting it in an outer packaging material, and pressure-reducing it, and manufacturing a vacuum heat insulating material. It is explanatory drawing at the time of manufacturing the vacuum heat insulating material by putting the plate-shaped core material which has the several level | step difference compression-molded using the binder or the thermocompression bonding method in an outer packaging material, and pressure-reducing it. It is explanatory drawing at the time of manufacturing a vacuum heat insulating material using a fiber assembly.

  In order to increase the thickness of the vacuum heat insulating material for the purpose of improving the heat insulating performance, for example, three or more raw cottons such as glass wool are stacked, combined with a binder, heat, etc., and compressed to form a plate-like core material, This is a vacuum heat insulating material corresponding to the upsizing of the refrigerator. As a conventional example of this type, there are plans shown in FIGS. This will be described below with reference to the drawings.

  In the case shown in FIG. 9, two or more fiber aggregates 51 a and 51 b that are formed by overlapping three sheets and extending the end of one layer of raw cotton 30 to 60 mm to form a protrusion 52 are provided as an outer packaging material 53. In a vacuum.

  In the figure, the protrusion before decompression is in the state of a solid line, but when decompression is started, the resistance of the space surrounded by the protrusion is small, so deformation such as bending of the core material occurs and the protrusion protrudes as shown by a broken line. The reduced pressure state work is finished in a state where the base 52 of the portion 52 is bent sharply, and the outer packaging material sealing work is finished.

  As shown in FIG. 9, the outer packaging material is greatly depressed at the F portion, and the handling property and performance thereafter are reduced, as well as the outer packaging material may be severely damaged by a sharp bend as shown in FIG. 9. It becomes a state.

  This is because the fiber aggregates 51a and 51b are compression-molded in advance using a binder or heat, so that the protruding portion 52 has a low degree of freedom of raw cotton and cannot fill the space.

  In addition, what is shown in FIG. 10 was put in the outer packaging material so as to combine two plate-shaped core materials made in advance with a binder, heat, etc., and decompressed, and then the outer packaging material was sealed. Is.

  If this is the case, the large depression shown in FIG. 9 will not be made, but the combination of stepped parts will increase the variation factors such as cutting and lamination of raw cotton, and the S dimension will not be constant. It must be increased and the transmission of width radiation heat increases.

  Moreover, since what is shown in FIG. 11 provided the protrusion part 54 in one of two fiber assemblies, and combined this with the other level | step-difference part 55, the subject of FIG. 9, FIG. 10 is eliminated. However, since the fiber assembly to be combined is not the target shape, the productivity is poor and the product becomes expensive.

  As described above, the vacuum heat insulating material shown in FIGS. 9 to 11 is not suitable for recycling or the like because the plate-shaped core material is solidified into a predetermined shape by a binder or heat. Further, at the time of decompression in the outer packaging material, there is a risk of damaging the outer packaging material at the end face of the plate-like core material, particularly the projecting portions 52 and 54 or the Q portion in FIG.

  In addition, it is necessary to prepare a fiber assembly having a complicated shape, resulting in poor productivity and high cost.

  Furthermore, when a dent (F) is made in the middle as shown in FIG. 9, there is a possibility that the flow of the foam heat insulating material may be hindered.

  On the other hand, the present invention provides a refrigerator including a vacuum heat insulating material and a foam heat insulating material in a heat insulating portion, wherein the vacuum heat insulating material has a plurality of fiber assemblies having a 30 to 60 mm protruding portion in which three or more layers of fiber assemblies are laminated. And a core material in which the plurality of fiber assemblies are combined so as to form a space between the protrusions, and an outer packaging material that stores the core material, and fills the space between the protrusions. The inside of the outer packaging material is compressed.

  Thereby, a wide vacuum heat insulating material can be manufactured without preparing special equipment according to the enlargement of a refrigerator.

  Also, when manufacturing this vacuum heat insulating material, the raw cotton located in the outermost layer is 30-60 mm wider than the other raw cotton, so that the protruding part is made. Therefore, when inserting into the inner bag, the protruding part is used as a reference for alignment. And the workability is good, and the flow of the foam heat insulating material is not obstructed when it is disposed in the heat insulating space. Moreover, the refrigerator provided with the vacuum heat insulating material without a big hollow is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of the refrigerator in the embodiment of the present invention, FIG. 2 is a sectional view of the vacuum heat insulating material of FIG. 1, and FIG. 3 is a raw cotton before compression and decompression of the vacuum heat insulating material of FIG. FIG. 4 is a view in which the raw cotton of FIG. 3 is put in an outer packaging material and decompressed, and FIG. 5 is an enlarged explanatory view of a P portion of FIG.

  First, in FIG. 1, reference numeral 1 denotes a box constituting the refrigerator body. The box 1 includes an outer box 2, an inner box 3, a foam heat insulating material 5, a vacuum heat insulating material 6, and the like.

  Increasing the size of the refrigerator body tends to be performed by increasing the opening width (width) of the refrigerator body. To widen the opening width, it corresponds to increasing the width of the top plate 2a, the back plate 2b, and the bottom plate 2c of the outer box 2.

  The vacuum heat insulating material 6 needs to be expanded in the width direction in accordance with the top plate 2a, the back plate 2b, and the bottom plate 2c that are enlarged corresponding to the widening of the refrigerator. For example, it can be considered that two vacuum heat insulating materials are arranged in parallel and applied to the top plate 2a, the back plate 2b, and the bottom plate 2c. However, this is preferable in terms of cost or heat around the outer packaging material (heat bridge). Not a way.

  Based on this, the vacuum heat insulating material 6 of this embodiment is demonstrated in FIG. The vacuum heat insulating material 6 is a plate-like core material in a compressed state in which at least one of a resin fiber layer that is an organic fiber aggregate or a glass wool layer that is an inorganic fiber aggregate and an adsorbent (not shown) are placed in an inner bag 8. It is made by wrapping with an outer packaging material 9 having gas barrier properties, and reducing the pressure inside the inner bag and the outer packaging material 9. In addition, as the resin fiber layer of the core material 7, resin fibers of polystyrene fibers (polypropylene, polyethylene terephthalate, etc.) may be used.

  The vacuum heat insulating material 6 wraps the core material 7 and the adsorbent with an outer packaging material 9 having a gas barrier property, sets it in a vacuum packaging machine, reduces the degree of vacuum to about 2.2 Pa, and holds it for a certain period of time. Is sealed. The heat conductivity of the vacuum heat insulating material obtained in this way is 2.2 to 2.5 mw / m · k when measured with a heat conductivity measuring device Auto λHC-074 manufactured by Eihiro Seiki Co., Ltd. Compared to, the heat insulation performance is about 10 times or more. Therefore, if this vacuum heat insulating material 6 is used as a heat insulating material in a refrigerator box, a significant energy saving effect can be obtained as compared with an unused refrigerator.

  Next, the inner bag 8 and the outer packaging material 9 constituting the vacuum heat insulating material 6 will be described.

  8 is an inner bag. The inner bag 8 is generally made of a polyethylene film. However, a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, or the like is not limited to a polyethylene film as long as it has low hygroscopicity and can be heat-welded and has little outgas. It is not something that can be done.

  In addition, a physical adsorption type synthetic zeolite is used as the adsorbent, but any adsorbent that adsorbs moisture or gas may be used, and a chemical reaction type adsorbent such as silica gel, calcium oxide, calcium chloride, and strontium oxide can also be used. .

  For the outer packaging material 9, a polypropylene film having low hygroscopicity is provided as a surface layer, an aluminum vapor deposition layer is provided on a polyethylene terephthalate film as a moisture barrier layer, and a gas barrier layer is provided on the ethylene vinyl alcohol copolymer film with an aluminum vapor deposition layer. It was pasted to face the aluminum vapor deposition layer. The laminate structure of the jacket material 54 is a four-layer structure of the above material, but is not limited to the above structure as long as it is a polyamide film or a polyethylene terephthalate film having equivalent gas barrier properties, heat resistance, and piercing strength. .

  The core material 7 is not solidified with a binder, but a raw cotton 10 described later is put in an inner bag 8 and decompressed and compressed into a plate shape.

  Here, when the raw cotton 10 is generally an inorganic fiber, a natural fiber such as glass wool, glass fiber, alumina fiber, silica-alumina fiber, or cotton is used.

  Next, the fiber assembly 11 will be described with reference to FIG. In addition, the raw cotton 10 which comprises this fiber assembly 11 is cut out to a required dimension from the raw cotton on a roll wound in roll shape, for example, thickness 100mm and width 500mm.

  The fiber assembly 11 shown in FIG. 3 is obtained by stacking a raw cotton 10a layer having a length T1 and raw cotton 10b and 10c layers having a length T2. The raw cotton 10a of the layer of length T1 is laminated so as to be located outside the layers of raw cotton 10b and 10c of length T2.

  The difference between T1 and T2 is 30 mm to 60 mm. In this embodiment, the projecting portion corresponding to the dimension of 30 mm to 60 mm is referred to as the projecting portion 12.

  In addition, although an end material is produced by cutting the raw roll cotton, it is also possible to produce a fiber assembly using this end material.

  Two or more fiber assemblies having end portions extended by 30 to 60 mm to form projecting portions 12 are combined in such a way that the projecting portions 12 form a space in the middle and placed in an inner bag, and compressed into a plate-like shape. Put it in the outer packaging as a core and depressurize it. Thereby, the vacuum heat insulating material deform | transformed so that the space 13 may be filled up with the raw cotton of a protrusion part and another part is obtained. As a result, it can be incorporated into a large heat insulating plane of a large refrigerator.

  The reason why the protrusion 12 is 30 mm to 60 mm is that when the raw cotton is 300 mm or more in the laminated state and the size of the protruding part is small, the raw cotton runs up due to the cut dimensions of the raw cotton and the variation in the lamination. . Moreover, it is because a fall of heat insulation performance will be anxious if too large.

  The vacuum heat insulating material having a plate thickness of 15 mm manufactured as described above is disposed in a place where the heat insulating space is about 30 mm to 40 mm in the refrigerator. This is because if the heat insulation space is 30 mm or less, there is a concern that the flow of urethane during foaming may be hindered even with a foam heat insulating material with improved fluidity.

  When the fiber aggregates 11 and 11 are combined as shown in FIG. 3, a space 13 surrounded by the protruding portion 12 and the end of the raw cotton 10b is formed. The vacuum heat insulating material can be easily widened by using two fiber assemblies 11 of the same shape made in the same production line and inverting one of the fiber assemblies.

  Further, a three-layer stack of raw cotton having a thickness of 100 mm can be used as a vacuum heat insulating material having a thickness of 15 mm.

  The fiber aggregates 11 and 11 combined in this way are put into the inner bag 8, the inner bag 8 is deaerated and compressed, and the space is filled with the protruding portion 12 and other portions of raw cotton, for example, raw cotton 10a and 10b. At the same time, the space is filled by compressing the raw cotton even during decompression.

  FIG. 5 is an enlarged view of a portion P in FIG. In the state of FIG. 3, when the inner bag 8 and the outer packaging material 9 are depressurized in a state where the space 13 is surrounded by the protruding portion 12 and the end of the raw cotton 10 b, the air in the space 13 is drawn and the protruding portion 12. Of course, the end of the raw cotton 10b is also drawn toward the space 13 and fills the space 13 as shown in FIG. This is because the raw cotton 10 is not solidified by a binder, heat or the like, so that the raw cotton is deformed by the negative pressure in the space 13.

  As a result, the space 13 does not become the sudden depression described with reference to FIG. 8 of the conventional example, and the usability and the heat insulation performance are not deteriorated.

  Next, in FIG. 6 and FIG. 7, how to combine the fiber assemblies will be described. 6 is a diagram for explaining how to combine the raw cotton in FIG. 3, and FIG. 7 is a diagram for explaining how to combine raw cotton different from FIG. 5 in order to explain FIG.

  In the figure, 11 is a fiber assembly, 12 is a protrusion, and 13 is a space. Along with the expansion of the vacuum heat insulating material 6, for example, to about 750 mm, two fiber assemblies 11 having a T3 dimension of 400 mm and a T4 dimension of 50 mm are prepared. When this fiber assembly 11 is put into the outer packaging material 9, the work process is set so that the longitudinal alignment portion (space 13) of the fiber assembly 11 can be seen from the opening of the outer packaging material 9.

  As a result, it is possible to arrange and seal in the vacuum pack device while observing the combined state, so that it is possible to reduce defects such as riding on the combined state. That is, the conventional example shown in FIG. 7 is a work process in which the longitudinal alignment portion (space 13) of the fiber assembly cannot be seen from the opening of the outer packaging material, and thus positioning is difficult and the possibility of an increase in defects may be increased. is there.

Here, the core material of the vacuum heat insulating material has the role of ensuring the heat insulating performance and the plate thickness. In order to ensure this, the basis weight of the raw cotton constituting the core material in a plate shape is controlled at about 1200 g / m ² . Usually, a vacuum heat insulating material having a thickness of 5 mm is manufactured by compressing one layer of raw cotton to 5 mm. Therefore, two layers of raw cotton are laminated to obtain a vacuum heat insulating material having a thickness of 10 mm, and three layers of raw cotton are laminated to obtain a vacuum heat insulating material having a thickness of 15 mm.

  This embodiment is applied when obtaining a vacuum heat insulating material thicker than about 15 mm thick as described above. In addition, when one layer is 4 mm, it is possible to obtain a vacuum heat insulating material having a plate thickness of about 12 mm.

  Next, an example in which the mating portion of the vacuum heat insulating material 6 and the heat radiating pipe are combined will be described with reference to FIG.

  In the figure, 1 is a box, 2 is an outer box, 2b is a back plate, 2d is a side plate, 3 is an inner box, 5 is a foam insulation, 5a is a stock solution of the foam insulation 5, 6 is a vacuum insulation, It is a protrusion.

  Reference numeral 14 denotes a heat radiating pipe. The heat radiating pipe 14 is attached to the side plate 2d, and the side plate 2d is used as a heat radiating plate. However, the heat radiating pipe 14 becomes an obstacle when the second vacuum heat insulating material 15 is attached. Therefore, the second vacuum heat insulating material 15 is provided with a groove 16 for absorbing the heat radiating pipe 14 as shown in the figure.

  If it is the vacuum heat insulating material 6 of this invention, the heat radiating pipe 4 can be arrange | positioned using the recessed part 17 formed in the place which hits the joint of a heat insulation block, without providing an exclusive groove | channel. That is, as described with reference to FIG. 6, the concave portion 17 is formed on the outer surface of the projecting portion 12 as long as the space 13 is formed between the projecting portions 12 of the fiber assembly 11 and is compressed in the inner bag 8. The heat radiating pipe 14 can be arranged here.

  At the time of decompression, the projecting portion 12 is generally recessed toward the space 13, but since there is raw cotton that enters the space 13 portion from the raw cotton 10 b, 10 c side, it becomes a recess 17 of about 1 to 3 mm. If the recessed part 17 is utilized, the heat radiating pipe 14 about 4 mm in diameter can be arrange | positioned.

  Usually, the foam insulation 5 is filled in the refrigerator box 1 in a foaming jig so that the back plate 2b faces up, and the stock solution 5a is poured into the back plate 2d, and the outer box 2 is shown as an arrow. Foaming is started upward between the inner box 3 and the vacuum insulating material and the inner box 3, and the heat insulating space is filled with a foam heat insulating material such as urethane foam.

  In this process, the vacuum heat insulating material 6 described above is disposed and fixed in the heat insulating space.

  Since the present invention is configured as described above, the following effects can be obtained.

  That is, in the refrigerator provided with a heat insulating part including a vacuum heat insulating material and a foam heat insulating material, the vacuum heat insulating material includes a plurality of fiber aggregates having a protrusion of 30 to 60 mm, and the plurality of fiber aggregates each of the protrusions. A core material combined so as to form a space between the parts and an outer packaging material containing the core material were provided, and the inside of the outer packaging material was compressed so as to fill the space between the protruding portions.

  Further, the plurality of fiber aggregates are arranged so as to form the space between the protruding portions in the long side direction, and then stored in an inner bag, and are stored in the inner bag in the outer bag. It was stored to have a thickness of 12 mm or more and a width of 500 mm or more.

  Thereby, the vacuum heat insulating material which expanded the width | variety can be obtained, without preparing special equipment according to the enlargement of a refrigerator.

  In addition, since the raw cotton located in the outermost layer is 30 to 60 mm wider than other raw cotton to form a protruding part, the protruding part may be combined as a reference for alignment when inserted into the inner bag, and workability Is improved and does not hinder the flow of the foam insulation when disposed in the heat insulation space. Moreover, the refrigerator provided with the vacuum heat insulating material without a big hollow is obtained.

  Moreover, the recessed part was formed in the outer surface of the said protrusion part, and the thermal radiation pipe was arrange | positioned in this recessed part. Thus, it is not necessary to provide a groove for avoiding the heat radiating pipe specially on the vacuum heat insulating material side.

DESCRIPTION OF SYMBOLS 1 Box 2 Outer box 2a Top plate 2b Back plate 2c Bottom plate 2d Side plate 3 Inner box 4 Heat insulation space 5 Foam heat insulation material 5a Stock solution 6 Vacuum heat insulation material 7 Core material 8 Inner bag 9 Outer packaging material 10 Raw cotton 11 Fiber assembly 12 Protrusion part 13 Space 14 Radiation pipe 15 Second vacuum heat insulating material 16 Groove 17 Recess

Claims (3)

In a refrigerator equipped with a vacuum heat insulating material and a foam heat insulating material in a heat insulating part,
The vacuum heat insulating material includes a plurality of fiber assemblies having protrusions of 30 to 60 mm, a core material combining the plurality of fiber assemblies so as to form a space between the protrusions, and the core material. The refrigerator is characterized in that the inside of the outer packaging material is compressed so as to fill the space between the protruding portions.   The plurality of fiber assemblies are arranged so as to form the space between the projecting portions in the long side direction, and then stored in an inner bag, and stored in the outer packaging material in a state of being stored in the inner bag. The refrigerator according to claim 1, wherein the refrigerator has a thickness of 12 mm or more and a width of 500 mm or more.   The refrigerator according to claim 1 or 2, wherein a concave portion is formed on an outer surface of the protruding portion, and a heat radiating pipe is disposed in the concave portion.