JP4602357B2 - Refrigerator insulation box and manufacturing method thereof - Google Patents

Description

  The present invention relates to a refrigerator heat insulating box provided with a vacuum heat insulating material and a method for manufacturing the same.

  A conventional refrigerator heat insulation box is disclosed in Patent Document 1. This refrigerator heat insulation box has an inner box that forms the wall surface of the storage room, and an outer box that is arranged outside the inner box. A spacer is fixed to the inner surface side of the outer box, and a vacuum heat insulating material is attached on the spacer. Thereby, the vacuum heat insulating material is arranged between the inner box and the outer box. Further, a meandering heat radiating pipe is attached to the inner surface side of the outer box, and the spacer is provided with a plurality of grooves that intersect the heat radiating pipe and avoid contact with the heat radiating pipe.

  A foam heat insulating material is filled between the inner box and the outer box, and the vacuum heat insulating material, the spacer, and the heat radiating pipe are covered with the foam heat insulating material. The foam heat insulating material penetrates into the groove portion of the spacer, and the heat radiating pipe in the groove portion is buried in the foam heat insulating material. Thereby, while insulating a vacuum heat insulating material and a thermal radiation pipe and improving the heat insulation effect of a vacuum heat insulating material, degradation by the heat | fever of a vacuum heat insulating material can be suppressed.

Japanese Patent Laying-Open No. 2005-55086 (page 4 to page 10, FIG. 3)

  However, according to the conventional refrigerator heat insulation box, the groove provided in the spacer is formed with a narrow width in the direction in which the heat radiating pipes are arranged in parallel in order to maintain the strength of the land between the grooves. For this reason, the cross-sectional area of a groove part becomes narrow and a foaming heat insulating material may not fully osmose | permeate in a groove part. Therefore, there has been a problem that the heat insulating performance of the refrigerator heat insulating box is lowered. In addition, it is necessary to create a spacer by molding or the like for forming the groove, and there is a problem that the cost of the spacer and the heat insulating box solid for the refrigerator is increased.

  An object of this invention is to provide the refrigerator heat insulation box which can aim at cost reduction while improving heat insulation performance.

  In order to achieve the above object, a heat insulating box for a refrigerator according to the present invention includes an inner box that forms a wall surface of a storage room, an outer box that is arranged outside the inner box, and a meander on the inner surface side of the outer box. A heat-dissipating pipe attached, a spacer made of a heat insulating material arranged in contact with the heat-dissipating pipe and extending in a direction intersecting the heat-dissipating pipe, a vacuum heat-insulating material arranged on the spacer, and the inner box, And a foam heat insulating material filled between the outer boxes.

  According to this configuration, the heat radiating pipe is attached to the inner surface of the outer box, and the vacuum heat insulating material is attached to the spacer disposed on the heat radiating pipe by bonding or the like. Thereby, a vacuum heat insulating material is distribute | arranged to the middle of an inner box and an outer box. A foam heat insulating material is filled between the inner box and the outer box, and the vacuum heat insulating material, the spacer, and the heat radiating pipe are covered with the foam heat insulating material.

  According to the present invention, in the heat insulating box for a refrigerator having the above-described configuration, the spacer is made of a soft member and deforms to cover the periphery of the heat radiating pipe and to contact the outer box. According to this configuration, the spacer that intersects the meandering heat radiating pipe is attached in contact with the outer box by closing between the adjacent heat radiating pipes.

  Moreover, the present invention is characterized in that, in the heat insulating box for a refrigerator having the above-described configuration, a cut is provided on the surface of the spacer. According to this configuration, the spacer is attached to the outer box and the vacuum heat insulating material by bonding or the like. The spacer is easily deformed by cutting, and is arranged in contact with the outer box along the heat radiating pipe. The notches are preferably provided on the side of the spacer facing the outer box. When attaching a vacuum heat insulating material after attaching a spacer to an outer box, you may provide a notch | incision in the side which faces the vacuum heat insulating material of the spacer.

  In the heat insulation box for a refrigerator having the above-described configuration, the spacer is characterized in that an aluminum foil is provided on a side in contact with the outer box. According to this configuration, the heat of the heat radiating pipe is transmitted to the outer box via the aluminum foil.

  In the heat insulating box for a refrigerator having the above-described configuration, the spacer is made of a hard member, and the foam heat insulating material is filled between the spacer and the outer box between the radiating pipes adjacent to each other by meandering. It is characterized by. According to this configuration, the spacer is bridged by the meandering heat radiating pipe, and the gap between the spacer and the outer box between the adjacent heat radiating pipes is closed by the foam heat insulating material.

  Moreover, the present invention is characterized in that, in the heat insulating box for a refrigerator having the above-described configuration, the spacer is bonded onto the heat radiating pipe with a hot melt adhesive.

  The present invention also includes an inner box forming a wall surface of the storage chamber, an outer box arranged outside the inner box, a heat radiating pipe meanderingly attached to the inner surface of the outer box, and the heat radiating pipe. And a spacer extending in a direction crossing the heat radiating pipe, a vacuum heat insulating material disposed on the spacer, and a foam heat insulating material filled between the inner box and the outer box In the method for manufacturing a heat insulating box for a vehicle, the spacer is made of a soft member provided with an adhesive material on the side facing the vacuum heat insulating material and is provided with a notch in a separator covering the adhesive material, After covering the periphery of the heat radiating pipe and attaching to the outer box, the separator is removed and the vacuum heat insulating material is bonded onto the spacer.

  According to this configuration, the spacer is easily deformed by cutting the separator provided on the vacuum heat insulating material side, and is arranged in contact with the outer box along the heat radiating pipe. Thereafter, the separator is removed, and the vacuum heat insulating material is bonded onto the spacer by the adhesive material.

  According to the heat insulating box for a refrigerator of the present invention, the vacuum heat insulating material is arranged on the spacer made of the heat insulating material extending in the direction intersecting with the heat radiating pipe in contact with the heat radiating pipe. Or it is closed with foam insulation. Therefore, the heat insulating performance of the heat insulating box for the refrigerator can be improved by reliably insulating the heat radiating pipe and the vacuum heat insulating material. Moreover, it is not necessary to form a groove part in a spacer, and the cost of a spacer and the heat insulation box for refrigerators can be reduced.

  In addition, according to the heat insulating box for a refrigerator of the present invention, the spacer made of a soft member is deformed and covers the periphery of the heat radiating pipe and comes into contact with the outer box. It is possible to insulate and isolate the pipe and the vacuum insulation.

  Moreover, according to the heat insulation box for refrigerators of this invention, since the notch was provided in the surface of a spacer, a spacer can be changed easily and can be arrange | positioned along a thermal radiation pipe. Therefore, the man-hour for installing the spacer can be reduced, and the adjacent heat radiating pipes can be more reliably closed.

  Further, according to the refrigerator heat insulating box of the present invention, since the spacer is provided with aluminum foil on the side in contact with the outer box, the heat of the heat radiating pipe is hardly transmitted to the vacuum heat insulating material, and the heat radiating pipe Heat can be transferred to the outer box to improve heat dissipation efficiency.

  Further, according to the refrigerator heat insulating box of the present invention, the spacer is made of a hard member, and the foam insulating material is filled between the spacer and the outer box between the adjacent heat radiating pipes. The heat insulating material can easily penetrate and the heat radiating pipe and the vacuum heat insulating material can be reliably insulated.

  Moreover, according to the heat insulation box for refrigerators of this invention, since the spacer was adhere | attached on the heat radiating pipe with the hot melt adhesive, the adhesion | attachment of a spacer can be automated and the cost of the heat insulation box for refrigerators can be reduced more.

  Further, according to the method for manufacturing a heat insulating box for a refrigerator of the present invention, a spacer made of a soft member provided with an adhesive material and a separator on the side facing the vacuum heat insulating material is attached in contact with the outer box covering the periphery of the heat radiating pipe. Then, since the separator was removed and the vacuum heat insulating material was adhered onto the spacer, the spacer can be easily deformed and disposed along the heat radiating pipe. Therefore, it is possible to reduce the number of man-hours for installing the spacers and more reliably close between adjacent heat radiating pipes.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the refrigerator heat insulation box according to the first embodiment. The refrigerator heat insulation box 1 has an inner box 3 formed of a resin molded product while forming the wall surface of each storage chamber 10 of the refrigerator. An outer box 2 made of a metal plate is disposed outside the inner box 3. The outer box 2 includes a U-shaped member formed by bending a metal plate to form a top surface and both side surfaces, a back plate made of a metal plate and covering the back surface, and a bottom plate made of a metal plate and covering the bottom surface. Formed in combination.

  A spacer 4 is fixed to the inner surface side of the side surface portion of the outer box 2. The spacer 4 is made of a soft urethane foam having a heat insulating property and can be freely deformed. A vacuum heat insulating material 5 is attached on the spacer 4. Thereby, the vacuum heat insulating material 5 is arranged between the inner box 3 and the outer box 2. Between the inner box 3 and the outer box 2, the foam heat insulating material 8 is filled, and the vacuum heat insulating material 5 and the spacer 4 are covered with the foam heat insulating material 8.

  The vacuum heat insulating material 5 is formed with a thin thickness of about 5 to 8 mm by covering the core material with an outer jacket material and reducing the pressure inside. Thereby, the clearance gap between the inner box 3 and the vacuum heat insulating material 5 is enlarged, and the stock solution of the foam heat insulating material 8 becomes easy to flow. Therefore, the space | gap in the foam heat insulating material 8 can be reduced and the intensity | strength of the heat insulation box 1 for refrigerators can be improved.

  Further, when the spacer 4 is formed of a hard resin having a concave portion that avoids interference with the heat radiating pipe 6, the heat insulating property of the spacer 4 is lowered. On the other hand, since the spacer 4 is made of a soft urethane foam, the heat insulation is high, and the heat bridge between the outer box 2 and the vacuum heat insulating material 5 can be reduced. If the soft urethane foam is an independent foam, the heat insulation is further increased.

  FIG. 2 shows a view in the direction of arrow A in FIG. A meandering heat radiating pipe 6 is attached to the inner surface of the side plate of the outer box 2 with an aluminum adhesive tape (not shown) or the like. The heat radiating pipe 6 is connected to a compressor when the refrigerator heat insulating box 1 is incorporated in the refrigerator, and constitutes a high temperature part of the refrigeration cycle to radiate heat.

  A plurality of spacers 4 are in contact with each other on the heat radiating pipes 6 arranged in parallel by meandering (on the side opposite to the outer box 2) and are arranged in parallel in the direction in which the heat radiating pipes 6 extend. Therefore, the heat radiating pipe 6 between the adjacent spacers 4 is covered with the foam heat insulating material 8.

  After the heat insulating pipe 6, the spacer 4, and the vacuum heat insulating material 5 are attached to the foam heat insulating material 8, the stock solution is injected from the injection port 2 a provided in the outer box 2 and foamed. The stock solution is injected from the inlet 2a by installing the refrigerator heat insulation box 1 so that the inlet 2a is on the top and the front side of the refrigerator heat insulation box 1 is on the bottom. The injection port 2a is provided at a position that does not overlap the spacer 4 in the vertical direction during injection.

  The stock solution of the foam heat insulating material 8 flows down between the spacers 4 to the front side of the refrigerator heat insulating box 1. A gap of 30 to 50 mm is provided between the spacer 4 and the front side of the refrigerator heat insulation box 1. Thereby, the undiluted solution spreads over the entire front side of the refrigerator heat insulation box 1 and is easily spread. Further, a gap of about 15 to 30 mm is provided between the vacuum heat insulating material 5 and the front side of the refrigerator heat insulating box 1. This ensures heat insulation performance and makes it easy to spread the stock solution.

  Moreover, you may make the end surface of the spacer 4 by the side of the injection port 2a, and the end surface of the vacuum heat insulating material 5 into the same height. Thereby, the spacer 4 is positioned with reference to the end face of the vacuum heat insulating material 5, and the spacer 4 can be easily attached to the vacuum heat insulating material 5.

  FIG. 3 is a cross-sectional view taken along the line BB in FIG. Since the spacer 4 is made of a soft member, the spacer 4 is deformed and is disposed in contact with the inner surface of the outer box 2 so as to cover the periphery of the heat radiating pipe 6. Thereby, the space between the adjacent heat radiating pipes 6 is blocked by the spacer 4, and the heat of the heat radiating pipes 6 is hardly transmitted to the vacuum heat insulating material 5.

  An aluminum foil 9 is provided on the surface of the spacer 4 on the outer box 2 side. The aluminum foil 9 is in contact with the heat radiating pipe 6 and transmits heat of the heat radiating pipe 6 to the outer box 2. As a result, the heat of the heat radiating pipe 6 can be further prevented from being transmitted to the vacuum heat insulating material 5, and the heat can be transmitted to the outer box 2 to improve the heat radiation efficiency. The aluminum foil 9 may be shared with an aluminum tape for attaching the heat radiating pipe 6.

  FIG. 4 shows a front view of the spacer 4. Adhesive material (not shown) is provided on both surfaces of the spacer 4, and a detachable separator 4a is attached on the adhesive material. Moreover, the notch 4b which penetrates the separator 4a is provided in both surfaces of the spacer 4. As shown in FIG. The aluminum foil 9 is provided on the inner surface side of the adhesive material.

  When the heat radiating pipe 6 is attached to one surface of a metal flat plate forming the outer box 2 with an aluminum tape or the like, the spacer 4 from which one separator 4a is removed is attached onto the outer box 2. At this time, the spacer 4 is easily deformed along the heat radiating pipe 6 by the notches 4b provided in the spacer 4 and the separator 4a. Thereby, the man-hour for installing the spacer 4 can be reduced, and the gap between the heat radiating pipe 6 and the spacer 4 can be reduced and the adjacent heat radiating pipes 6 can be reliably closed.

  Thereafter, the separator 4 a opposite to the side facing the outer box 2 is removed from the spacer 4, and the vacuum heat insulating material 5 is pasted on the spacer 4. And the U-shaped member which bent the metal flat plate and attached the vacuum heat insulating material 5 to the inner surface side is formed, and the outer case 2 is formed combining a backplate and a bottom plate (all are not shown).

  The adhesive material may be provided only on one surface of the spacer 4, and the spacer 4 and the vacuum heat insulating material 5 may be bonded to each other by applying a hot melt adhesive on the spacer 4. Thereby, the operation | work which removes the separator 4a by the side of the vacuum heat insulating material 5 is not required, and a man-hour can be reduced. Further, the separator 4a may be omitted by using the spacer 4 wound in a roll shape so that the bonding surface is on the outer peripheral side.

  In addition, as shown in FIG. 5, the spacer 4 previously attached to the vacuum heat insulating material 5 may be attached to the outer box 2 to cover the heat radiating pipe 6. In this case, the spacer 4 may be provided with a cut 4b on the surface on the outer box 2 side. Thereby, since the spacer 4 before a deformation | transformation is affixed on the vacuum heat insulating material 5, the adhesiveness between the vacuum heat insulating material 5 and the spacer 4 can be improved, and generation | occurrence | production of a space | gap can be prevented.

  In addition, the cut of the separator 4a is easy to peel off if it is formed leaving about 1 to 3 mm at both ends and one end. Further, it is more desirable to form the notch 4b at a position that does not overlap the heat radiating pipe 6. Thereby, even if the alignment accuracy at the time of sticking of the spacer 4 is bad, the spacer 4 can be easily deformed by the cut 4b.

  According to the present embodiment, since the vacuum heat insulating material 5 is arranged on the spacer 4 made of a heat insulating soft member extending in a direction intersecting with the heat radiating pipe 6 in contact with the heat radiating pipe 6, the heat radiating pipe 6 adjacent to the meander is adjacent to the heat radiating pipe 6. The space is closed by the spacer 4. Therefore, the heat insulating performance of the refrigerator heat insulating box 1 can be improved by reliably insulating the heat radiating pipe 6 and the vacuum heat insulating material 5 from each other. Further, it is not necessary to form a groove in the spacer 4 as in the conventional example, and the spacer 4 can be easily formed by cutting. Therefore, the cost of the spacer 4 and the refrigerator heat insulating box 1 can be reduced.

  In the present embodiment, the spacer 4 is made of a soft urethane foam, but may be formed of other materials as long as it is a soft member that has heat insulating properties and can be easily deformed.

  Next, FIG. 6 has shown the upper surface sectional drawing of the refrigerator heat insulation box 1 of 2nd Embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In this embodiment, the spacer 4 is made of a hard member having heat insulating properties such as a hard urethane foam. Other parts are the same as those in the first embodiment.

  The spacer 4 is formed by cutting a plate-shaped hard member into a strip shape, and is disposed in contact with the heat radiating pipe 6. Thereby, the gap between the spacer 4 and the outer box 2 between the adjacent heat radiating pipes 6 is closed by the foam heat insulating material 8. At this time, since the gap between the spacer 4 and the outer box 2 is formed in the entire space between the heat radiating pipes 6, the cross-sectional area is large, and the foam heat insulating material 8 permeates sufficiently. Thereby, the space | gap which arises in the clearance gap between the spacer 4 and the outer case 2 can be reduced.

  The heat radiating pipe 6 is attached to one surface of a metal flat plate forming the outer box 2 by an aluminum tape having an aluminum foil 9 on the surface. A spacer 4 is bonded onto the heat radiating pipe 6 by applying a hot melt adhesive. A hot melt adhesive is applied on the spacer 4 and the vacuum heat insulating material 5 is bonded. And the outer box 2 which bent the metal flat plate and attached the vacuum heat insulating material 5 to the inner surface side is formed.

  Since the spacer 4 is made of a hard member, it can be easily grasped by a robot, and the spacer 4 and the vacuum heat insulating material 5 are bonded with a hot melt adhesive. Thereby, adhesion of the spacer 4 and the vacuum heat insulating material 5 can be automated, and a man-hour can be reduced. In addition, the vacuum heat insulating material 5 and the spacer 4 may be bonded and integrated in advance, and may be bonded onto the heat radiating pipe 6 with a hot melt adhesive. Note that a double-sided tape or a thin putty-like butyl rubber may be used for each bonding.

  According to the present embodiment, the vacuum heat insulating material 5 is disposed on the spacer 4 made of a heat insulating hard member that is in contact with the heat radiating pipe 6 and extends in a direction intersecting the heat radiating pipe 6. The space is closed with the foam insulation 8. Therefore, the heat insulating performance of the refrigerator heat insulating box 1 can be improved by reliably insulating the heat radiating pipe 6 and the vacuum heat insulating material 5 from each other. Further, it is not necessary to form a groove in the spacer 4 as in the conventional example, and the spacer 4 can be easily formed by cutting. Therefore, the cost of the spacer 4 and the refrigerator heat insulating box 1 can be reduced.

  In this embodiment, the spacer 4 is made of a hard urethane foam, but may be made of other materials as long as it is a hard member having heat insulation properties. And if it is an independent foaming thing, the heat insulation effect will increase further. Moreover, when the length relationship between the spacer 4 and the vacuum heat insulating material 5 is the relationship described in the first embodiment, effects such as the flow of the stock solution of the foam heat insulating material 8 can be obtained similarly.

  Moreover, although the vacuum heat insulating material 5 is provided in the side surface of the heat insulation box 1 for refrigerators in 1st, 2nd embodiment, even if it provides in a back surface, a bottom face, or a top | upper surface, the same effect can be acquired.

  According to this invention, it can utilize for the refrigerator heat insulation box provided with the vacuum heat insulating material.

The front view which shows the refrigerator heat insulation box of 1st Embodiment of this invention. 1 arrow view of FIG. BB sectional view of FIG. The front view which shows the spacer of the refrigerator heat insulation box of 1st Embodiment of this invention. The front view which shows the other form of the spacer of the refrigerator heat insulation box of 1st Embodiment of this invention. Top surface sectional drawing which shows the principal part of the refrigerator heat insulation box of 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulation box for refrigerator 2 Outer box 3 Inner box 4 Spacer 4a Separator 4b Cut 5 Vacuum heat insulating material 6 Radiation pipe 8 Foam heat insulating material 9 Aluminum foil 10 Storage room

Claims (5)

An inner box forming the wall surface of the storage chamber, an outer box arranged outside the inner box, a heat radiating pipe meanderingly attached to the inner surface of the outer box, and being arranged in contact with the heat radiating pipe A spacer made of a heat insulating material extending in a direction crossing the heat radiating pipe, a vacuum heat insulating material disposed on the spacer, and a foam heat insulating material filled between the inner box and the outer box ,
The spacer is made of a soft member, is deformed to cover the periphery of the heat radiating pipe and is in contact with the outer box,
A heat insulating box for a refrigerator , wherein at least a surface of the spacer in contact with the outer box is cut . 2. The heat insulation for a refrigerator according to claim 1, wherein a separator is provided on a surface of the spacer in contact with the outer box, and the notch into the separator corresponding to the notch of the spacer is formed leaving at least one end. Box. The heat insulation box for a refrigerator according to claim 1 or 2, wherein the cut is formed at a position that does not overlap the heat radiating pipe. The heat insulating box for a refrigerator according to any one of claims 1 to 3, wherein the spacer is provided with an aluminum foil on a side in contact with the outer box. An inner box forming the wall surface of the storage chamber, an outer box arranged outside the inner box, a heat radiating pipe meanderingly attached to the inner surface side of the outer box, and being arranged in contact with the heat radiating pipe A heat insulating box body for a refrigerator comprising a spacer extending in a direction intersecting the heat radiating pipe, a vacuum heat insulating material disposed on the spacer, and a foam heat insulating material filled between the inner box and the outer box. In the manufacturing method,
The spacer is formed of a soft member in which an aluminum foil is provided on a side in contact with the outer box, an adhesive is provided on a side facing the vacuum heat insulating material and a side in contact with the outer box,
A removable separator is pasted on the adhesive material,
The both sides of the spacer are provided with cuts penetrating the separator,
The separator on the side to which the aluminum foil is attached is removed, the spacer is deformed to cover the periphery of the heat radiating pipe and attached to the outer box, and then the other separator is removed and the spacer is placed on the spacer. The manufacturing method of the heat insulation box for refrigerators which adhered the vacuum heat insulating material.

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