JP3870398B2 - Vacuum insulation and refrigerator - Google Patents

Description

The present invention relates to a vacuum heat insulating material and a refrigerator using the vacuum heat insulating material.

  As for the conventional refrigerator, as shown in FIG. 3 and the specification of Patent Document 1, a freezing room is formed at the bottom of the heat insulating box, and vacuum heat insulating materials are provided corresponding to both sides and the back of the freezing room. In addition, the refrigerant piping of the cooling device was attached to the inner surface of the outer box located above the vacuum heat insulating material.

Japanese Patent Laid-Open No. 10-205995 (FIG. 3)

  However, in Patent Document 1, consideration has not been given to preventing damage to the vacuum heat insulating material itself in handling and the like when the vacuum heat insulating material is incorporated into a refrigerator. That is, since the refrigerator outer box is often formed using a steel sheet thin plate, when the vacuum heat insulating material comes into contact with the member end surface formed of the steel sheet thin plate when the vacuum heat insulating material is incorporated, the vacuum The outer jacket material of the heat insulating material may be damaged, and the gas barrier property gradually deteriorates due to the damage, and after a long period of time, the thermal conductivity of the vacuum heat insulating material may be lowered, This point was not fully considered.

  Further, when the vacuum heat insulating material is depressurized to a predetermined degree of vacuum, the jacket material forming the outer surface of the vacuum heat insulating material is pressure-bonded so as to be in close contact with the core material surface by atmospheric pressure. Sometimes, a tensile force is applied to the jacket material of the ridge line portion of the vacuum heat insulating material, and internal stress may remain in the jacket material of the ridge line portion. When an external force is applied to the ridge portion of the vacuum heat insulating material where the internal stress remains, the damage gradually increases with the passage of time, and eventually the outer cover material may be destroyed.

  Furthermore, there has been a problem when the core material is encapsulated with a jacket material. 12 and 13 are diagrams for explaining conventional vacuum heat insulating material manufacturing. As shown in FIGS. 12 and 13, the envelope 91 of the vacuum heat insulating material needs to be configured to be larger than the core material because of including the core material 92 (in FIG. 12, W21> W22, L21). > L22). Accordingly, as shown in FIG. 12, when the core material 92 is disposed in an uneven manner in the jacket material 91, the width dimension of the film edge (hereinafter referred to as an ear portion) that seals the jacket material is partially A smaller portion 91c appears. Since the ear | edge part in which such a width dimension became small cannot be folded back on the core material surface, the seal wrinkle 90c as shown in FIG. 13 will generate | occur | produce. The seal wrinkle 90c has a considerable rigidity because at least two synthetic resin films are superposed. Therefore, when this ear | edge part contact | abuts to the soft wiring of electrical goods, or the adjacent vacuum heat insulating material itself, the said wiring and the vacuum heat insulating material itself will be damaged. Further, if the foamed heat insulating material such as urethane is filled in the state where the seal wrinkle 90c is generated, the seal wrinkle 90c inhibits the filling flow of the urethane and forms an unfilled portion or a heat insulating layer having a different filling specific gravity. Defects may occur.

  Therefore, when the vacuum heat insulating material is assembled between the outer box and the inner box of the refrigerator, the present invention mistakenly, during the assembling work, the ridge line portion which is the strength weakness of the vacuum heat insulating material is made of a steel plate. Even if it abuts against the member end face of the formed outer box or a refrigerant pipe such as a copper pipe or an aluminum pipe forming the refrigeration cycle of the refrigerator, the jacket material of the vacuum heat insulating material is damaged. The object is to provide a structure of reduced degree.

  In addition, even if vacuum insulation is placed in the foam insulation such as urethane in the refrigerator together with electrical wiring, it provides a structure that does not damage each other and does not hinder the filling flow of foam insulation such as urethane It aims at providing a vacuum heat insulating material.

In order to achieve the above object, the refrigerator of the present invention has a positioning portion inside a bag of a rectangular bag-shaped outer jacket material, and a vacuum heat insulating material formed by enclosing a core material with the outer jacket material, It is arranged between the box and the inner box ,
The four sides of the rectangular bag-shaped jacket material are an opening that constitutes one side of the jacket material,
The positioning part is provided, and is constituted by three sides of one side on the back side and both sides on the left and right sides facing the opening,
The positioning part is arranged on the center side of the jacket material from the peripheral part of the three sides,
The distance between the positioning portions provided on both the left and right sides is shorter on the back side than on the opening side.
Further, in this refrigerator, the planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning unit is arranged such that the core material is arranged at the center of the planar projection surface of the jacket material. Provided, and the ridge line portion of the core material is configured to be covered with an ear portion that protrudes from the planar projection surface of the core material of the jacket material,
A vacuum heat insulating material is arrange | positioned so that the said ridgeline part covered with the said ear | edge part may become the said inner box side.

Further, the refrigerator of the present invention has a positioning portion inside the bag of the rectangular bag-shaped outer jacket material, and the vacuum heat insulating material including the core material included in the outer jacket material between the outer box and the inner box. Arranged in
The planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning portion is provided so that the core material is disposed at the center of the planar projection surface of the jacket material, The ridge line portion is covered with an ear portion that protrudes from the plane projection surface of the core material of the jacket material.
,
A gap is provided between a side surface of the core material that is continuous with the ridge line portion covered by the ear portion and the ear portion,
A vacuum heat insulating material is arrange | positioned so that the said ridgeline part covered with the said ear | edge part may become the said inner box side.

Moreover, the vacuum heat insulating material of the present invention has a positioning part inside the bag of the rectangular bag-shaped outer jacket material, and encloses the core material with this outer jacket material,
The four sides of the rectangular bag-shaped jacket material are an opening that constitutes one side of the jacket material,
The positioning part is provided, and is constituted by three sides of one side on the back side and both sides on the left and right sides facing the opening,
The positioning part is arranged on the center side of the jacket material from the peripheral part of the three sides,
The distance between the positioning portions provided on both the left and right sides is shorter on the back side than on the opening side.

Further, in this vacuum heat insulating material, the planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning unit is arranged at the center of the planar projection surface of the jacket material. The ridge line portion of the core material is configured to be covered with an ear portion that protrudes from the planar projection surface of the core material of the jacket material.

  According to the present invention, when the vacuum heat insulating material is assembled between the outer box and the inner box of the refrigerator, the ridge line portion, which is the strength weakness of the vacuum heat insulating material, is mistakenly made by the steel sheet thin plate during the assembling operation. Even if it abuts against the member end face of the formed outer box or a refrigerant pipe such as a copper pipe or an aluminum pipe forming the refrigeration cycle of the refrigerator, the jacket material of the vacuum heat insulating material is damaged. A structure that reduces the degree can be provided.

  In addition, even if vacuum insulation is placed along with electrical wiring in foam insulation such as urethane in the refrigerator, it can provide a structure that does not damage each other, and vacuum that does not hinder the filling flow of foam insulation such as urethane Thermal insulation can be provided.

  Hereinafter, details of the present invention will be described with reference to embodiments shown in the drawings.

  FIG. 1 is a longitudinal sectional view of a refrigerator showing an embodiment of the present invention.

  As shown in FIG. 1, a refrigerator box 1 includes an outer box 2 formed using a thin steel plate, an inner box 4 formed of resin, etc., and an outer box 2 and an inner box 4. It is constituted by a foam heat insulating material 3 such as urethane filled with foam. Further, in the box 1, a refrigerator compartment 5a, a vegetable compartment 5b and freezer compartments 6a, 6b are partitioned and formed in a heat insulating wall forming the refrigerator compartment 5a vegetable compartment 5b and freezer compartments 6a, 6b. Is provided with vacuum heat insulating materials 21, 22, 23, 25, 26, which will be described later, which have better heat insulating performance than the foamed heat insulating material 3 such as urethane, to reduce the amount of heat leakage from the portion.

  The vacuum heat insulating materials 21, 22, 23, 25, 26, etc. are configured to be incorporated into the inner surface of the outer box 2 before the foam filling of the foam heat insulating material 3 described above, and may contact an obstacle. . In this example, the obstacles are the refrigerant pipe 8, the electrical wiring 11, the clamping part 2c, the clamping part 2e, the holding part 2g, etc., as will be described later. Reference numerals 7 and 10 denote a cooler and a blower that cool and hold the above-described refrigerator compartment 5a, vegetable compartment 5b, and freezer compartments 6a and 6b at a predetermined low temperature. 8 is a refrigerant pipe composed of a copper pipe, an aluminum pipe or the like that connects the cooler 7 and the compressor 9 to form a series of refrigeration cycles. The refrigerant pipe 8 is filled and installed in the above-described foam heat insulating material 3, and may contact the vacuum heat insulating material as will be described later.

  11 is an electric wiring of the blower 10, which is coated with a soft resin or the like, is filled in the above-described foam heat insulating material 3, and may come into contact with the vacuum heat insulating material as described later.

  FIG. 2 is a sectional view taken along line AA in FIG. 2b is a side plate of the outer box 2 described above, and has a holding portion 2c of the inner box 4 on the front opening side of the box body of the side plate 2b, and a holding portion 2e of the back plate 2f on the back side as a single body or separately. ing. 26 is a vacuum heat insulating material that is disposed on the inner surface of the outer box side plate 2b and reduces the amount of heat leakage from the portion. The vacuum heat insulating material 26 foams the foam heat insulating material 3 such as urethane. Before filling, it is configured to be disposed on the inner surface of the outer box side plate 2b. Therefore, during the assembling work for disposing the vacuum heat insulating material 26 on the inner surface of the outer box side plate 2b, the vicinity of the ridge line portion 26a of the vacuum heat insulating material may be brought into contact with the holding portion 2c or the holding portion 2e. The vicinity of the ridge line portion 26a of the heat insulating material is configured to be covered with an ear portion 26b described later.

  25 is a vacuum heat insulating material that is disposed on the inner surface of the outer case back plate 2f and reduces the amount of heat leakage from the portion, and the vacuum heat insulating material 25 includes the aforementioned foam heat insulating material 3 such as urethane. Prior to foam filling, the outer casing back plate 2f is arranged on the inner surface. Therefore, during the assembling work of disposing the vacuum heat insulating material 25 on the inner surface of the outer case back plate 2f, the vicinity of the ridge line portion 25a of the vacuum heat insulating material may be brought into contact with the sandwiching portion 2e. The vicinity of the ridge portion 25a is configured to be covered with an ear portion 25b described later.

  8 is a refrigerant pipe constituting the above-described refrigeration cycle, and the refrigerant pipe 8 is arranged in the foam heat insulating material 3 as shown in FIG. 2, so that the vicinity of the ridges 26a and 25a of the vacuum heat insulating materials 26 and 25 In this case, the vicinity of the ridges 26a and 25a of the vacuum heat insulating material is covered with ears 26b and 25b described later.

  Similarly, the ridge line portions 26a and 25a of the vacuum heat insulating material, which are likely to come into contact with the soft electric wiring 11, are covered with ear portions 26b and 25b described later to prevent mutual damage. It is.

  FIG. 3 is a sectional view taken along line BB in FIG. 2a is the ceiling plate of the outer box 2 described above, and has a holding portion 2g for holding the outer box side plate 2b as a single body or as a separate body.

  21 and 23 are disposed on the inner surface of the outer box ceiling plate 2a and the inner surface of the side plate 2b, and are vacuum heat insulating materials for reducing the amount of heat leakage from the portion, the vacuum heat insulating materials 21 and 23 are the above-mentioned Before the foam insulation material 3 such as urethane is foam-filled, it is arranged on the inner surface of the outer box ceiling plate 2a and the inner surface of the side plate 2b. Therefore, during the assembling work of disposing the vacuum heat insulating materials 21 and 23 on the inner surface of the outer box ceiling plate 2a and the inner surface of the side plate 2b, the vicinity of the ridge line portion 21a or 23a of the vacuum heat insulating material may come into contact with the holding portion 2g. Therefore, the vicinity of the ridge part 21a or 23a of the vacuum heat insulating material is configured to be covered with an ear part 21b or 23b described later.

  Next, the structure of the vacuum heat insulating material will be described with reference to FIGS. FIG. 4 is an explanatory view of a vacuum heat insulating material configuration showing an embodiment of the present invention.

  In order to simplify the description, the above-described vacuum heat insulating materials 21, 22, 23, 25, 26, etc. are represented as vacuum heat insulating materials 30, and the ridge portions 21a, 22a, 23a, 25a , 26a, etc. are represented as ridge lines 30a, and ears 21b, 22b, 23b, 25b, 26b, etc. are represented as ears 30b.

  First, FIG. 4 will be described. Reference numeral 31 denotes an outer cover material of the vacuum heat insulating material 30. The outer cover material is formed in a substantially rectangular bag shape, and is set to a size such that the core material raw material 41 can be inserted through the opening 32. 33 is a plurality of positioning formed on the bag-shaped outer jacket material 31, and the positioning 33 is formed at a position where the core material 41 can be arranged at the approximate center of the plane projection surface of the bag-shaped outer jacket material 31. .

  In this example, by having a positioning portion such as 33, it is possible to provide a structure that does not damage each other even if it comes into contact with an obstacle.

  A configuration example of the positioning 33 will be described with reference to FIGS. 5 and 6 showing a first embodiment of the present invention. FIG. 5 is an explanatory plan view of a vacuum heat insulating material according to the first embodiment of the present invention, and FIG. 6 is a sectional view taken along the line CC shown in FIG.

  The shape shown by the two-dot chain line in FIG. 5 is that an arbitrary three outer peripheral sides of a substantially rectangular planar outer covering material 31 are welded by a heat welding portion 34a, and at the same time, a core material raw material positioning 33a, which will be described later, is provided. FIG. 5 is a plan view showing a state in which a plurality of locations are formed inside, and the shape indicated by the solid line and the dotted line in FIG. 5 is a three-dimensional shape of the planar outer covering material formed in the substantially rectangular bag shape as shown in FIG. FIG. 3 is a plan view showing a state in which the core material 41 is inserted by an insertion guide plate 44, compressed air, manual work, or the like through the opening 32 of the jacket material 31 after inflating {T1> T2}. The planar projection surface of the jacket material 31 is configured to be larger than the planar projection surface of the core material 41.

  This positioning is formed by thermally welding a position corresponding to the positioning of the jacket material 31. Moreover, you may arrange | position a positioning member in the said site | part inside a bag. When the positioning member is arranged, there is no problem in heat insulation performance if the same material as the core material is used.

  That is, the four sides of the jacket material 31 are formed of an opening 32 constituting one side of the four sides and the other three sides, and the peripheral part of the other three sides is a welded portion 34a to be thermally welded. A positioning 33 is provided on the center side of the welded portion 34a. These configurations will be described below.

  5 and 6, the size dimensions of the core material 41 are defined as thickness T2, width W2, and length L2, and the plane size dimensions in the welded portion 34a of the jacket material 31 and in a welded portion 34b described later are used. Assuming that the width W1 and the length L1 are {W1 = W2 + W3 + W4} and {L1 = L2 + L3 + L4}, the core is formed from the opening 32 of the bag-shaped jacket 31 as described above. W3, W4, L3, and L4 are almost the same size, and the {W3 + W4} dimension is twice the thickness T2 of the core material 41. To 5 times. That is, if there is no positioning 33b to be described later, the position of the core material 41 in the jacket material is not determined as in the example shown in FIG. Accordingly, in the present invention, as shown in FIG. 5, a plurality of positioning 33b are installed on the bag-like outer covering material at a position almost in close contact with the core material peripheral edge 41b by heat welding or the like. In other words, when the arbitrary three outer peripheral sides of the substantially rectangular planar outer covering material 31 are sealed by the heat welding portion 34a, at the same time, the width W2 dimension or the length L2 dimension of the core material raw material 41 is used as a reference. Alternatively, the close contact portion 33a of the bag-like jacket material is formed by thermal welding or the like at a position separated from the L2 dimension by a predetermined dimension W5, W6 or L5. Then, if the predetermined dimensions W5, W6 or L5 are substantially equal to the thickness T2 dimension of the core material raw material 41, the planar outer covering material 31 is expanded as shown in FIG. When the material raw material 41 is inserted, as shown in FIG. 5, the close contact portion 33a indicated by the alternate long and short dash line in the planar shape is the same as that shown in FIG. It moves to the solid line portion 33b shown in FIG.

  The jacket material 31 is composed of a composite film in which an organic material film such as polyethylene resin or polyacrylonitrile resin is laminated on the inner surface of a metal foil such as an aluminum foil, and the weld portion 34a is welded in a substantially flat shape. Therefore, the width N1, N2 or N3 is usually set to a welding allowance of about 5 mm to 15 mm. However, since the welding allowance N4 of the welded portion 34b that is pressurized after inserting the core material 41 and welded after reducing the pressure to a predetermined degree of vacuum causes variations in flatness at the time of welding, the welding portion 34a Sometimes it is set a little larger.

  In addition, the positioning 33b described above is a system that regulates the position of only three sides of the core material 41, but the other side regulates the movement in the opposite direction of the insertion of the core material 41 as shown in FIG. The core material raw material 41 can be positioned by inserting it into contact with the rear positioning 33b by means of an insertion guide plate 44 or the like having a convex portion.

  Next, the manufacturing process of the vacuum heat insulating material showing one embodiment of the present invention will be described with reference to FIG. 7 (a), 7 (b), and 7 (c) are diagrams illustrating the manufacturing process corresponding to the section corresponding to the line DD in FIG. FIG. 7 (a) shows the state when the core material 41 is inserted into the bag-shaped jacket material, and FIG. 7 (b) shows the pressure after the core material 41 is inserted and reduced to a predetermined degree of vacuum. 7b shows the state when the welded portion 34b (34b in FIG. 5) is welded, and FIG. 7 (c) is a place that protrudes from the core material surface or bottom surface of the bag-shaped outer cover material of FIG. As shown, the portion of the outer cover material 31 that protrudes from the plane projection surface of the core material 41 is indicated as an ear part) and the vacuum heat insulating material ridge line 30a is covered.

  First, in FIG. 7A, the core material 41 has a bag-shaped outer covering material 31 because the dimensions in FIG. 5 are substantially W3 = W4 = L3 = L4 as described with reference to FIG. It becomes the structure arrange | positioned in the approximate center of this plane projection surface. Further, the δ1 dimension shown in FIG. 7A is about a dimension that can absorb the manufacturing position error between the core material 41 and the positioning 33b. There is no change in the configuration in which it is arranged at the approximate center of the projection plane. In general, it is desirable that the δ1 dimension for absorbing the manufacturing position error is about 10 mm to 15 mm.

  In addition, even if W3 ≠ L3 (W4 ≠ L3) and L3 ≠ L4, the positioning 33a provided on the back side that forms one side opposite to the opening 32 is the dimension of the core material raw material 41 If W3 = W4, the position where the core material 41 is arranged from the end of the two sides in the left-right direction is left and right. It becomes the central part of the direction, and it is possible to restrict the lateral displacement that is likely to be displaced when the core material 41 is inserted, and the width of the ear portion can be made substantially equal on the left and right.

  Next, as shown in FIG. 7 (b), when the core material 41 is encapsulated and pressurized with a predetermined pressure and the inside is depressurized to a predetermined degree of vacuum, the thickness T2 of the core material 42 is a predetermined thickness. Compressed to length T3, the width dimension becomes W8 at the same time. In this case, when a raw material in which an inorganic binder such as sodium silicate is blended with glass fiber or the like is used as the core material 41, the W8 dimension is substantially equal to the W2 dimension. Therefore, the width W7 or W9 of the outer ear 36 of the jacket material is increased from the initial dimension by about half the difference between the thickness dimensions T2 and T3, respectively. Therefore, by installing the above-described positioning 33b, the width W7 or W9 of the ear portion 36 of the jacket material is changed to the folded portion 30b (the ear portion) covering the vacuum heat insulating material ridge line 30a as shown in FIG. The portion folded back so as to cover the vacuum heat insulating material ridge line 30a is hereinafter referred to as a folded portion). In other words, the dimensions W7 and W9 of the ear part 36 shown in FIG. 7B are set so that the dimension of the folded part 30b covering the vacuum heat insulating material ridge line 30a shown in FIG.

  At this time, it is desirable that the ear portion be folded back in the same direction. In other words, it is desirable that the core material 42 be folded back toward the same plane. This is because the folded portion 30b is formed on the same plane of the vacuum heat insulating material 30, and the other surface is flat, which is advantageous when, for example, bonding to the outer box.

  Note that, as described above, the folded portion 30b is formed of a composite film in which the covering material 31 is formed by laminating an organic material film such as polyethylene resin or polyacrylonitrile resin on the inner surface of a metal foil such as an aluminum foil. In addition, since two composite films of the jacket material 31 are superposed, the film has rigidity. Therefore, the vacuum heat insulating material ridge line 30a covered with the folded portion 30b has a configuration that can withstand contact of other members. .

  Further, since the positioning is provided as described above, the dimensions of the ear part 36 and the folded part 30b of the vacuum heat insulating material to be manufactured are approximately the same. Therefore, when installing in the refrigerator, the contact between the clamping part 2c, the clamping part 2e, the refrigerant pipe 8, the electrical wiring 11, and the holding part 2g shown in FIG. It is not necessary to improve the manufacturing efficiency.

  In this example, the positioning 33 is provided so as to arrange the core material 42 in the center of the planar projection surface of the jacket material 31, and the vacuum heat insulating material ridge line 30a is covered with the ear portion 36 and is configured to be vacuum heat insulating. When the material 30 is installed in the refrigerator, the ridge line portion covered by the ear portion 36 (that is, the vacuum heat insulating material ridge line portion 30a in FIG. 7C) is arranged on the refrigerator inner box 4 side.

  By arranging the vacuum heat insulating material 30 in this way, the flat surface of the vacuum heat insulating material 30 on the refrigerator outer box 4 side becomes flat, which is advantageous not only for adhesion but also for the external shape (flatness) of the refrigerator.

  Also, as shown in FIGS. 2, 3 and 7C, if a gap is provided between the side surface of the vacuum heat insulating material 30 that is continuous with the ridge line portion 30a and the folded portion 30b, the folded portion of this portion is provided. 30b has elasticity, and the risk of damaging the vacuum heat insulating material itself and the obstacle is reduced even if the vacuum heat insulating material is slightly contacted with the obstacle such as the refrigerant pipe 8 and the electric wiring 11 when the vacuum heat insulating material is incorporated into the refrigerator.

  According to the present embodiment, the positioning material 33 is formed so that the core material 42 can be arranged at substantially the center of the plane projection surface of the bag-shaped outer covering material 31, and a vacuum is formed at the ear portion protruding from the surface or bottom surface of the core material 42 of the outer covering material 31. Since the heat-insulating material ridge line 30a is covered and the covered ridge line portion 30a is disposed so as to face an obstacle between the outer box 2 and the inner box 4, the outer box 2 and the inner box of the refrigerator 1 When assembling the vacuum heat insulating material between the four, the ridgeline portion 30a, which is the strength weakness of the vacuum heat insulating material, is mistakenly brought into contact with the end face of the outer box 2 formed of a thin steel plate during the assembling work. However, even if it comes into contact with the refrigerant pipe 8 such as a copper pipe or an aluminum pipe forming the refrigeration cycle of the refrigerator 1, the extent to which the jacket 31 of the vacuum heat insulating material is damaged can be reduced. In addition, since the seal wrinkles protruding from the surface of the vacuum heat insulating material do not occur, even if the vacuum heat insulating material is arranged together with the electrical wiring 11 in the foam heat insulating material such as urethane of the refrigerator, the refrigerator structure does not damage each other Moreover, the vacuum heat insulating material structure which does not inhibit the filling flow of foam heat insulating materials, such as urethane, can be provided. In addition, since the core material 42 can be disposed substantially at the center of the planar projection surface of the bag-shaped outer covering material 31, a vacuum heat insulating material structure that improves the efficiency of folding the ear portion can be provided.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  FIG. 8 is an explanatory plan view of a vacuum heat insulating material showing a second embodiment of the present invention. In addition, the member shown with the same number as the member number shown in above-mentioned FIGS. 5-7 represents having the same function as the above-mentioned function. In addition, the same symbol indicating the width dimension and the like indicates that it has the same meaning as described above with reference to FIGS.

  The feature of the second embodiment shown in FIG. 8 is that the positioning disposed on the bag-shaped outer covering material 31 is divided into a plurality of positioning positioning positioning 33e on the opening 32 side into which the core material raw material 41 is inserted. Is disposed away from the side edge 41b of the core material 41 by a predetermined dimension W13, so that the insertion work of the core material 41 is further improved in efficiency. The predetermined dimension W13 is set to be smaller than the difference W3 or W4 between the width of the bag-shaped outer covering material 31 and the width of the core material raw material 41. That is, the relationship {δ1 <W13 <W3} or {δ1 <W3 <W4} is set. Also, the effect of positioning the insertion position of the core material 41 in the center of the planar projection surface of the bag-shaped outer jacket material 31 by dividing and installing the 33b serving as the positioning of the inner edge 41c of the core material 41 in a plurality of locations. Will be improved.

  In this way, the distance between the positioning portions provided on both the left and right sides is made shorter than the positioning 33e on the back side than the positioning 33e on the opening side, thereby facilitating the insertion of the core material 41 and improving the manufacturing efficiency. can do.

  According to the present embodiment, further, if a plurality of heat welding portions are installed at positions along the periphery of the core material of the bag-shaped outer covering material 31, during the manufacturing process of thermally welding the peripheral edge of the rectangular outer covering material 31. At the same time, since the positioning heat welding portion can be formed, a refrigerator structure with good manufacturing efficiency can be provided.

  FIG. 9 shows another embodiment of the second embodiment of the present invention. If the W13 dimension is reduced in this way, the positioning 33e functions as an insertion guide at the time of insertion, and the core material 41 is guided along the two-dot chain line shown in the figure at the time of insertion. It becomes easy to do.

  FIG. 10 shows still another embodiment of the second embodiment of the present invention. In this example, the four sides of the jacket material 31 are configured such that the distance between the positioning provided on both the left and right sides when viewed from the opening 32 is shorter on the back side than the opening 32 side. The positioning 33e ′ provided on the side is configured to be shorter on the back side than on the opening 32 side. That is, among the positioning provided on both the left and right sides, the rear positioning 33b extends in the same direction as the insertion direction of the core material 41 so that the core material 41 is arranged in the center in the left and right direction, and the opening The positioning 33e ′ on the part 32 side is configured to guide the core material 41 to the center. According to such a configuration, the core material 41 is guided to the center in the left-right direction of the jacket material 31 at the time of insertion, so that it can be easily inserted.

  FIG. 11 shows a third embodiment of the present invention. In addition, description is abbreviate | omitted about the same sign as the above-mentioned drawing. In this example, the positioning 33b is not provided so as to be positioned at the center in the left-right direction, and is configured such that one of the ears is enlarged (W3 <W4). However, as shown in FIGS. 12 and 13, W3 is determined so that the seal wrinkle 90c and the part 91c that cannot be folded back on the surface of the core material are not generated.

  As shown in FIG. 1, the vacuum heat insulating material is disposed between the outer box 2 and the inner box 4 of the refrigerator 1, and the foam heat insulating material 3 is filled between the outer box 2 and the inner box 4. Further, as shown in FIG. 2, the refrigerant pipe 8 and the electric wiring 11 are arranged in this region. If the vacuum heat insulating material is provided in contact with the outer box 4, the following problem may occur.

  The jacket material 31 requires gas barrier properties in order to maintain the internal vacuum, and usually includes an aluminum foil layer. Since the aluminum foil layer has a high thermal conductivity, heat may be transmitted through the surface of the jacket material 31 regardless of the heat insulating effect of the core material 41 inside. This phenomenon transfers heat from the front surface side to the back surface side of the vacuum heat insulating material. Further, when the ear portion of the jacket material 31 is bent in the vacuum heat insulating material to form the folded portion 30b, the folded and overlapped portion has more heat than the other portions. In addition, when the area of the overlapped portion is large, heat may be conducted to these when the refrigerant pipe 8 or the electric wiring 11 is disposed in the vicinity of the portion. In addition, when the portion is arranged at a position close to the compressor 9, the heat of the compressor 9 is easily transmitted.

  Therefore, as in the present example, the positioning member 33b is configured so that the core material 41 is arranged so as to be shifted to the one peripheral edge side from the center of the flat projection surface of the jacket material. That is, the four sides of the jacket material 31 are provided with an opening 32 that constitutes one side of the jacket material, and a positioning 33b, and one side on the far side facing the opening 32 and three sides of the left and right sides. In this configuration, the positioning 33 is shifted from one of the left and right sides on the center side with respect to the peripheral portion of the three sides.

  According to said structure, the folding | returning part 30b which covers the vacuum heat insulating material ridgeline part 30a becomes a magnitude | size which differs on the left-right side. Therefore, the smaller the area of the folded and overlapped portion, the smaller the heat conduction. When this vacuum ridge is placed in the vicinity of the refrigerant pipe 8 or the electrical wiring 11, the ridge line section is made closer to the refrigerant pipe 8 or the electrical wiring 11, so that the refrigerant pipe 8 or the electrical wiring 11 is connected. Heat conduction and heat conduction from the compressor 9 can be reduced.

It is a longitudinal cross-sectional view of the refrigerator which shows one Example of this invention. FIG. 2 is a sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along line BB in FIG. 1. It is a vacuum heat insulating material structure explanatory drawing which shows one Example of this invention. It is a vacuum heat insulating material top explanatory drawing which shows the 1st Example of this invention. FIG. 6 is a sectional view taken along line CC in FIG. 5. FIG. 6 is an explanatory diagram of a manufacturing process of a section corresponding to the line DD in FIG. 5. It is a vacuum heat insulating material plane explanatory drawing which shows the 2nd Example of this invention. It is a figure which shows another example of the 2nd Example of this invention. It is a figure which shows another example of the 2nd Example of this invention. It is a figure which shows the 3rd Example of this invention. It is a vacuum heat insulating material manufacture description top view of a prior art example. It is a vacuum heat insulating material manufacture explanatory sectional drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator box body, 2 ... Outer box, 2a ... Outer box ceiling board, 2b ... Outer box side plate, 3 ... Foam insulation, 4 ... Inner box, 7 ... Cooler, 8 ... Refrigerant piping, 10 ... Blower , 11... Electrical wiring, 21, 22, 23, 25, 26, 30... Vacuum insulation material, 31.

Claims (5)

It has a positioning part inside the bag of the rectangular bag-shaped outer jacket material, and is configured by arranging a vacuum heat insulating material including the core material in the outer jacket material between the outer box and the inner box ,
The four sides of the rectangular bag-shaped jacket material are an opening that constitutes one side of the jacket material,
The positioning part is provided, and is constituted by three sides of one side on the back side and both sides on the left and right sides facing the opening,
The positioning part is arranged on the center side of the jacket material from the peripheral part of the three sides,
A refrigerator characterized in that the distance between the positioning portions provided on both the left and right sides is shorter on the back side than on the opening side. The planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning portion is provided so that the core material is disposed at the center of the planar projection surface of the jacket material, The ridge line portion is covered with an ear portion protruding from the plane projection surface of the core material of the jacket material,
The refrigerator according to claim 1, wherein a vacuum heat insulating material is arranged so that the ridge line portion covered by the ear portion is on the inner box side. It has a positioning part inside the bag of the rectangular bag-shaped outer jacket material, and is configured by arranging a vacuum heat insulating material including the core material in the outer jacket material between the outer box and the inner box,
The planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning portion is provided so that the core material is disposed at the center of the planar projection surface of the jacket material, The ridge line portion is covered with an ear portion that protrudes from the plane projection surface of the core material of the jacket material.
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A gap is provided between a side surface of the core material that is continuous with the ridge line portion covered by the ear portion and the ear portion,
A refrigerator in which a vacuum heat insulating material is arranged so that the ridge line portion covered by the ear portion is on the inner box side. It has a positioning part inside the bag of the rectangular bag-shaped jacket material, and encloses the core material with this jacket material,
The four sides of the rectangular bag-shaped jacket material are an opening that constitutes one side of the jacket material,
The positioning part is provided, and is constituted by three sides of one side on the back side and both sides on the left and right sides facing the opening,
The positioning part is arranged on the center side of the jacket material from the peripheral part of the three sides,
The vacuum heat insulating material characterized in that the distance between the positioning portions provided on both the left and right sides is shorter on the back side than on the opening side. The planar projection surface of the jacket material is larger than the planar projection surface of the core material, and the positioning unit is provided so that the core material is arranged at the center of the planar projection surface of the jacket material, The ridge line part of this is covered with the ear | edge part which protrudes from the plane projection surface of the said core material of the said jacket material, The vacuum heat insulating material of Claim 4 comprised.

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