JP2018119691A - Cold storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold storage capable of preventing a glass pane from coming off and preventing painting from peeling off.SOLUTION: A cold storage comprises: a door body 11 for opening/closing the opening of a lower stage refrigeration chamber; a glass pane 20 provided at the front of the door body 11; a coated film 30 that is a paint layer provided on the rear face of the glass pane 20; a splash prevention film 40 provided on the rear face of the coated film 30; and an urethane adiabatic material R that is a filling material provided on the rear face side of the film 40 and a vacuum adiabatic material. The adhesive strength between the urethane adiabatic material R and the film 40 is smaller than that between the coated film 30 and the glass pane 20; the sum of the adhesive strength between the urethane adiabatic material R and the film 40 and the adhesive strength between the vacuum adiabatic material 60 and the film 40 is to be larger than the maximum expansion force of the vacuum adiabatic material 60 at the time of vacuum breakage.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a refrigerator.

  Various refrigerators have been proposed that include, for example, a glass plate as a decorative plate on the front surface of the door. This type of refrigerator door includes a frame (frame body) that holds the periphery of the glass plate and is filled with urethane (foamed polyurethane) as a heat insulating material (see, for example, Patent Document 1).

JP 2014-43983 A

  By the way, in the refrigerator of patent document 1, the film for scattering prevention at the time of glass breakage is affixed. When providing such a film, the space between the frame (frame body) and the glass is fixed with a double-sided tape. However, if the door is deformed due to heat shrinkage of urethane or the like, the glass may be peeled off. That is, as shown in FIG. 4A, the coating film 130 is formed on the back surface of the glass plate 120, the film 100 for preventing scattering is formed on the back surface of the coating film 130, and the film 100 and the frame 112 are both surfaces. In the case of the configuration fixed with the tape 150, the interfaces between the materials shown below are generated, and there is a possibility that the glass peels off due to the force relationship between the interfaces. For example, the deformation force F received by the glass plate 120 due to the heat shrinkage of urethane is determined by the sum of the adhesive force F2 between the film 100 and the heat insulating material R, the holding force F3 by the frame 112, and the adhesive force by the double-sided tape 150. When it becomes larger, it leads to glass peeling.

  Further, when a film for preventing glass scattering is not provided, an adhesive force is generated by directly adhering the painted surface of the glass and urethane. However, as shown in FIG. 4B, when the force F due to the thermal shrinkage of urethane is larger than the adhesive force F1 between the glass plate 120 and the coating film 130, the force to peel the painted surface from the glass becomes dominant. The surface may be peeled off. In addition, if the adhesive force between the heat insulating material R and the coating film 30 is small, when the vacuum heat insulating material is restored by vacuum breakage or the like, there is a possibility that the glass peels off if the restoring force is increased.

  An object of this invention is to provide the refrigerator which can prevent peeling of a translucent decorative board and paint peeling.

  The present invention provides a door body that opens and closes an opening of a storage chamber, a light-transmitting decorative plate provided on the front surface of the door main body, a paint layer provided on the back surface of the decorative plate, and a back surface of the paint layer. The refrigerator provided with the film provided, and the urethane heat insulating material and vacuum heat insulating material which are the filling provided in the back surface side of the film, The adhesive force of the urethane heat insulating material and the film is the paint layer and the decorative board And the sum of the adhesive force between the urethane heat insulating material and the film and the adhesive force between the vacuum heat insulating material and the film is larger than the maximum expansion force of the vacuum heat insulating material at the time of vacuum breakage. To do.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which can prevent glass peeling and paint peeling of glass can be provided.

It is a front view of the refrigerator of this embodiment. It is the sectional view on the AA line of FIG. It is a door sectional view. The holding structure of the conventional glass plate is shown, (a) is a case where a film is provided, (b) is a case where a film is not provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a front view of the refrigerator of the present embodiment.
As shown in FIG. 1, the refrigerator 1 includes a refrigerator body 10 that is partitioned into a refrigerator compartment 2, an ice making compartment 3, an upper freezer compartment 4, a lower freezer compartment 5 (storage compartment), and a vegetable compartment 6 from above. . The refrigerating room 2 includes refrigerating room doors (hereinafter abbreviated as doors) 2a and 2b that are divided into the left and right sides on the front side and open to the front side with double doors. In addition, the ice making chamber 3, the upper freezing chamber 4, the lower freezing chamber 5, and the vegetable compartment 6 are the refrigerator compartment 2, the ice making chamber 3, the upper freezing compartment 4, the lower freezing compartment 5 (storage room), and the front opening of the vegetable compartment 6 A drawer-type ice making door 3a, an upper freezer door 4a, a lower freezer door 5a, and a vegetable door 6a (hereinafter abbreviated as doors 3a, 4a, 5a, 6a). In the following description, the refrigerator 1 having six doors 2a, 2b, 3a, 4a, 5a, and 6a has been described as an example. However, the invention is also applicable to a refrigerator having five or less doors and seven or more doors. it can.

  A glass plate 20 (transparent decorative plate) is attached to the front surface of each door 2a, 2b, 3a, 4a, 5a, 6a. The glass plate 20 has a rectangular shape when viewed from the front, and has an area arranged on almost the entire front surface of each door 2a, 2b, 3a, 4a, 5a, 6a.

  2 is a cross-sectional view taken along line AA in FIG. In addition, in FIG. 2, illustration is abbreviate | omitted about the layer structure of the back surface side of the glass plate 20. As shown in FIG.

  As shown in FIG. 2, the door 5 a includes a door main body 11 that holds the glass plate 20, and a urethane heat insulating material R is provided as a filler in a space formed by the door main body 11 and the glass plate 20. In addition, the door 5a is provided with a packing 25 (seal member) that seals a gap between the lower freezer compartment 5 and the door 5a.

  The refrigerator body 10 includes a partition heat insulating wall 10a that partitions and insulates the vegetable room 6 in the storage temperature zone higher than the freezing temperature zone, and the ice making room 3, the upper freezing room 4, and the lower freezing room 5 in the same freezing temperature zone. And a partition member 10b which is not a partition heat insulating wall but a simple partition. When the square frame-shaped packing 25 provided on the door 5a is in close contact with the heat insulating partition walls (not shown) on both the left and right sides of the partition heat insulating wall 10a, the partition member 10b, and the refrigerator body 10, the lower freezer compartment 5 Is sealed.

  The glass plate 20 has optical transparency, and is made of, for example, colorless and transparent tempered glass. The plate thickness of the glass plate 20 is, for example, 2 mm to 3.5 mm, and the glass plate 20 is not broken or cracked by an impact generated when the refrigerator is assembled, transferred to the refrigerator, or used in a warehouse. (Thickness). Further, when further strengthening the strength or reducing the plate thickness, the glass plate 20 may be subjected to a heat strengthening treatment, a chemical strengthening treatment, or the like. The glass plate 20 is an insulator.

  The door main body 11 includes a frame 12 that constitutes the outer periphery of the upper, lower, left, and right sides, and a door liner (back plate) 13 that constitutes the back side, and has a space in which the urethane heat insulating material R is provided.

  The frame 12 is made of synthetic resin and has a holding portion 12 a that holds the lower end edge of the glass plate 20 and a holding portion 12 b that holds the upper end edge of the glass plate 20. Although not shown, the frame 12 also has a holding portion that holds the left and right edges of the glass plate 20.

  The door liner 13 is made of synthetic resin, and is configured such that the distance (T) from the glass plate 20 is substantially the same or a predetermined distance or more in the vertical direction corresponding to the lower freezer compartment 5. The door liner 13 is configured so that the distance from the glass plate 20 is substantially the same in the left-right direction corresponding to the lower freezer compartment 5. In the door 5 a configured as described above, a urethane heat insulating material (foamed polyurethane) R is provided in a space surrounded by the frame 12, the door liner 13, and the glass plate 20.

  The urethane heat insulating material R is made of hard urethane foam, and is configured by filling and foaming a urethane foam stock solution (a raw material solution for foam heat insulating material) injected into the door body 11 and then curing. . As the urethane foam stock solution, for example, a liquid prepared by mixing a polyether polyol with a foaming agent such as cyclopentane and water, and further a premix of an auxiliary agent such as a catalyst and a foam stabilizer, and an isocyanate liquid is used. Can be mentioned.

  The holding portion 12 a of the frame 12 is in contact with the back surface contact portion 12 a 1 that is in contact with the lower surface of the lower edge of the glass plate 20, the end surface contact portion 12 a 2 that is in contact with the lower end surface of the glass plate 20, and the front surface of the glass plate 20. And a front abutting portion 12a3, and is formed in a substantially U shape in a sectional view. The holding portion 12a holds the lower end of the glass plate 20 in a state where the lower end edge of the glass plate 20 is inserted.

  The holding portion 12b of the frame 12 includes a back surface contact portion 12b1 that contacts the back surface of the upper edge portion of the glass plate 20, and an end surface contact portion 12b2 that contacts the upper end surface of the glass plate 20, and is L in cross-sectional view. It is formed in a letter shape. The holding portion 12b holds the upper end of the glass plate 20 in a state where the upper end edge of the glass plate 20 is applied. Thus, by holding the glass plate 20 with the holding portion 12b having the butting structure, the glass plate 20 can widen the exposed area of the front surface, and the flatness of the front surface of the door 5a can be further enhanced. In the present embodiment, the case where the holding portion 12a is applied to the lower end of the glass plate 20 has been described as an example. However, the holding portion 12b is applied to all of the upper and lower edges and the left and right edges of the glass plate 20. Also good. Thereby, the area | region where the glass plate 20 is exposed to the front surface can further be expanded, and a flat feeling can be improved further.

  As shown in FIG. 3, a coating film (paint layer) 30 is provided on the back surface of the glass plate 20. The coating film 30 is a colored paint and conceals a member arranged on the back side through the colorless and transparent glass plate 20. The coating film 30 is made of, for example, an epoxy thermosetting resin. In addition, the coating film 30 is formed by forming a plurality of layers of epoxy-based thermosetting resin on the back surface of the glass plate 20 by screen printing (one layer has a thickness of, for example, 10 micrometers), and after screen printing, a baking process (for example, 120 (C or higher).

  A film 40 is attached to the back surface of the coating film 30. This film 40 is a film for preventing scattering even when an impact is applied to the glass plate 20 and the glass plate 20 is broken or cracked, so that the glass plate 20 is protected from being scattered around. is there. Note that an adhesive layer (not shown) is formed on one surface side (front surface) of the film 40, and the film 40 is fixed by being adhered to the coating film 30 via the adhesive layer.

  A urethane heat insulating material R is provided in the door body 11, and the urethane heat insulating material R adheres to the inner wall surface of the frame 12, the inner wall surface of the door liner 13 (see FIG. 2), and the other surface side (back surface) of the film 40. It is comprised by being filled.

  As shown in FIG. 3, a coating film (paint layer) 30 is provided on the back surface of the glass plate 20, and a film 40 for preventing scattering is further provided on the back surface of the coating film 30. Furthermore, a double-sided tape 50 is provided between the film 40 and the back contact portion 12b1, and the film 40 and the back contact portion 12b1 are bonded and fixed. In the abutting structure of the present embodiment, the door 5a provided with the double-sided tape 50 has been described as an example, but the present invention can also be applied to the door 5a provided with no double-sided tape 50.

  A urethane heat insulating material R is provided in the door body 11, and the urethane heat insulating material R adheres to the inner wall surface of the frame 12, the inner wall surface of the door liner 13 (see FIG. 2), and the other surface side (back surface) of the film 40. It is comprised by being filled.

  A vacuum heat insulating material 60 is attached to the film 40 via an adhesive layer 61. The adhesive layer 61 is made of double-sided tape, hot melt, or the like. Moreover, the vacuum heat insulating material 60 is arrange | positioned not in the whole surface of the film 40 but in a part of film 40 so that the area | regions E1 and E2 which the film 40 exposes may be formed.

  In the present embodiment, the adhesive force between the materials is controlled by the SP value. Here, the SP value is a solubility parameter, and is widely used as an affinity parameter such that two components having a small difference in SP value are easily mixed (high solubility). There are various known methods for estimating the SP value, which are roughly classified into a method of estimating from the physical property value and a method of estimating from the molecular structure.

  In this embodiment, the adhesive force between the urethane heat insulating material R and the film 40 is made smaller than the adhesive force between the paint layer 30 and the glass plate 20. That is, the difference between the SP value of the glass plate 20 and the SP value of the component blended most in the outermost layer of the paint layer 30 in direct contact with the glass plate 20 is in direct contact with the film 40. The difference is made smaller than the difference from the SP value of the component blended most in the urethane heat insulating material R. For example, the SP value of the glass plate 20 is 24.8, the component most blended in the outermost layer of the paint layer 30 is epoxy resin, the SP value is 23.5, the base material of the film 40 is polyethylene terephthalate, and SP. The value is 21.9, and the SP value of the urethane heat insulating material R is 20.5. In this case, the difference between the SP value of the glass plate 20 and the outermost layer of the paint layer 30 is 1.3, whereas the difference between the SP value of the film 40 and the urethane heat insulating material R is 1.4. As a result, the bonding force between the glass plate 20 and the outermost layer of the paint layer 30 increases, so that the glass plate 20 does not fall off and the paint layer 30 can be prevented from peeling off.

  Furthermore, in this embodiment, the sum of the adhesive force between the urethane heat insulating material R and the film 40 and the adhesive force between the vacuum heat insulating material 60 and the film 40 (due to the adhesive layer 61) is the maximum expansion force when the vacuum heat insulating material 60 is broken by vacuum. Make it bigger. Therefore, the difference in SP value between the outermost layer of the outer packaging material of the vacuum heat insulating material 60 and the film 40, or the difference between the SP value of the film 40 and the component most mixed in the urethane heat insulating material R is the innermost layer of the paint layer 30. The material is selected so as to be smaller than the difference in the SP value between the film 40 and the most blended component. For example, the SP value of the film 40 is 21.9, the SP value of the outer packaging material of the vacuum heat insulating material 60 is 16.6, the SP value of the urethane heat insulating material R is 20.5, and it is blended most in the innermost layer of the paint layer 30. The component is an epoxy resin and the SP value is 23.5. In this case, the difference in SP value between the outermost layer of the outer packaging material of the vacuum heat insulating material 60 and the film 40 is 5.3, while the difference in SP value between the urethane heat insulating material R and the film 40 is 1.4. The difference in SP value between the innermost layer of the layer 30 and the film 40 is 1.6. As a result, since the bonding force between the urethane heat insulating material R and the film 40 is increased, the glass plate 20 does not fall off and the coating layer 30 can be prevented from peeling even when the vacuum heat insulating material 60 expands during vacuum break.

  Moreover, it can adjust with respect to SP value of the other material at the time of selection of a material. For example, when the difference between the SP values of the urethane heat insulating material R and the film 40 is large, select an incompatible type additive for the urethane heat insulating material R and add an incompatible type additive. Thus, by making the additive unevenly distributed on the side where the urethane heat insulating material R and the film 40 are in contact with each other, the difference in SP value with the film 40 as the counterpart material is reduced, and the adhesive force is strengthened. The type and blending amount of the incompatible additive to be added can be adjusted so that the required SP value is obtained.

  The vacuum heat insulating material 60 is obtained, for example, by covering a core material 60a such as glass wool with an outer covering material 60b made of a gas barrier aluminum film and sealing the inside under reduced pressure. Further, the vacuum heat insulating material 60 is a so-called wet type. For example, a plurality of sheets formed by a wet papermaking method are stacked in an inner bag, put in an oven to remove moisture, and a plurality of stacked sheets Is the core material 60a. Then, the core material 60a is put in an aluminum outer jacket material (outer bag) 60b, which is vacuum-sealed and sealed. By the way, the dry type vacuum heat insulating material is composed of, for example, a plurality of layers of core materials such as glass wool, and is press-molded to a predetermined thickness (the first 1/4 to 1 / 5th thickness). Put the core material in the inner bag. Then, the inner bag is put in an aluminum outer bag and vacuumed.

  In the wet vacuum heat insulating material 60 obtained in this way, thin sheets are multi-layered, and variations in density per layer are alleviated, so that surface irregularities are reduced. That is, the flatness of the surface (the jacket material 60b) is increased. For this reason, the vacuum heat insulating material 60 can be stably fixed to the film 40 when the vacuum heat insulating material 60 is bonded and fixed to the film 40 through the adhesive layer 61.

  In addition, the wet vacuum heat insulating material 60 is less likely to expand and has less restoring force than the dry type (which tends to have a three-dimensional structure) because the core material 60a does not have a three-dimensional structure even when expanded. Thus, the restoring force can be reduced by using the wet vacuum heat insulating material 60. For this reason, the installation area of the vacuum heat insulating material 60 can be increased as compared with the dry type, and the heat insulating property of the door 5a can be improved.

  In the above-described embodiment, the case where it is applied to the door 5a has been described as an example. However, the other doors 2a, 2b, 3a, 4a, and 6a also have no release agent in the same manner as the door 5a. The film 40 and the urethane heat insulating material R can be adhered to each other to be configured. Further, the doors 2a, 2b, 3a, 4a, and 6a may be configured by sticking the vacuum heat insulating material 60 to the back surface of the film 40 having no release agent in the same manner as the door 5a.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the glass plate 20 is described as an example of the light-transmitting plate material provided on the front surface of the door main body 11. If it has, the transparent board | plate material which consists of PMMA resin (polymethacrylic acid methyl resin) etc. may be sufficient.

  Further, in the above-described embodiment, the case where a coating film (colored paint layer) is provided on the back surface of the glass plate 20 has been described as an example. However, a metal vapor deposition layer is formed on the back surface of the glass plate 20, and metal vapor deposition is performed. You may comprise by forming a coating film in the back surface of a layer.

1,1A, 1B Refrigerator 5 Lower freezer compartment (storage room)
DESCRIPTION OF SYMBOLS 11 Door main body 12 Frame 12a, 12b Holding part 12a1, 12b1 Back surface contact part 12a2, 12b2 End surface contact part 12a3 Front surface contact part 20 Glass plate (decorative board)
30 Paint film (paint layer)
40 Film (Splash prevention)
50 Double-sided tape (adhesive layer)
60 Vacuum heat insulating material 60a Core material 60b Cover material 61 Adhesive layer R Urethane heat insulating material

Claims (5)

A door body for opening and closing the opening of the storage room;
A decorative board having translucency provided on the front surface of the door body;
A paint layer provided on the back surface of the decorative plate;
A film provided on the back surface of the paint layer;
In a refrigerator provided with a urethane heat insulating material and a vacuum heat insulating material which are fillings provided on the back side of the film,
The adhesive force between the urethane heat insulating material and the film is smaller than the adhesive force between the paint layer and the decorative plate, and the sum of the adhesive force between the urethane heat insulating material and the film, and the adhesive force between the vacuum heat insulating material and the film, The refrigerator characterized by being larger than the maximum expansion force at the time of vacuum breaking of the vacuum heat insulating material. A door body for opening and closing the opening of the storage room;
A decorative board having translucency provided on the front surface of the door body;
A paint layer provided on the back surface of the decorative plate;
A film provided on the back surface of the paint layer;
In a refrigerator provided with a urethane heat insulating material that is a filling provided on the back side of the film,
The difference between the SP value of the decorative plate and the SP value of the component most often blended in the outermost layer of the paint layer in direct contact with the decorative plate is the SP value of the film and the urethane in direct contact with the film. The refrigerator characterized by being smaller than the difference from the SP value of the component most blended in the heat insulating material. A door body for opening and closing the opening of the storage room;
A decorative board having translucency provided on the front surface of the door body;
A paint layer provided on the back surface of the decorative plate;
A film provided on the back surface of the paint layer;
In a refrigerator provided with a urethane heat insulating material and a vacuum heat insulating material which are fillings provided on the back side of the film,
The difference in SP value between the outermost layer of the outer packaging material of the vacuum heat insulating material and the film, or the difference in SP value between the component most mixed in the urethane heat insulating material and the film is the innermost layer of the paint layer. The refrigerator is characterized in that it is smaller than the difference in SP value between the film and the most mixed component.   The difference between the SP value of the component most mixed in the outermost layer of the paint layer and the SP value of the decorative board is 1.5 or less, or any one of claims 1 to 3 The refrigerator according to item 1.   The additive blended in the urethane heat insulating material is incompatible, and the silicone foam stabilizer or amine catalyst is unevenly distributed on the side in contact with the urethane heat insulating material and the film by blending the additive. The refrigerator according to any one of claims 1 to 4.

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