JP2018013270A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that also has glass scattering prevention performance in a board projection surface, and whose productivity is improved.SOLUTION: A refrigerator comprises a door body for opening/closing an opening of a lower freezing chamber, a glass plate 20 that is a decorative plate provided on a front surface of the door body and having translucency, a coating film 30 that is a paint layer provided on a back surface of the glass plate 20, a scattering prevention film 40C provided on a back surface of the coating film 30, and a board 71 provided with a light emitting part 71b on the side of a back surface of the scattering prevention film 40C.SELECTED DRAWING: Figure 8

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. However, when the anti-scattering function is provided for the door with a built-in touch panel, the film is attached to a portion other than the substrate projection surface, so the film must be divided and attached, which has been a factor in reducing productivity. Therefore, this substrate projection surface did not have a scattering prevention function.

  An object of the present invention is to provide a refrigerator that has a glass projection preventing property on a substrate projection surface and has improved productivity.

  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. An anti-scattering film provided on the back side of the anti-scattering film.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide the refrigerator which has glass scattering prevention property also on the board | substrate projection surface, and improved productivity.

It is a front view of the refrigerator of this embodiment. It is the sectional view on the AA line of FIG. It is sectional drawing which shows the holding structure of a glass plate. It is sectional drawing which shows another holding structure of a glass plate. The process figure in the case of providing a film in a glass plate is shown, (a) is a case where a roll-shaped film is used, (b) is a case where a flat film is used. It is a table | surface which shows the relationship between the material of a film, and surface free energy. (A) is a sectional view of a door when a vacuum heat insulating material is provided on the door, and (b) is a diagram illustrating a problem when a vacuum heat insulating material is provided on a conventional door. It is a door sectional view in the position of a touch panel, (a) is this embodiment and (b) is a comparative example. Sectional drawing which shows 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 foam 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 foam 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 foam 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 foam heat insulating material R is made of hard urethane foam, and is configured by filling and foaming a urethane foam stock solution (raw material solution for foam heat insulating material) injected into the inside of the door body 11 and then curing. is there. 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.

  FIG. 3 is a cross-sectional view showing a glass plate holding structure, and FIG. 4 is a cross-sectional view showing another glass plate holding structure. FIG. 4 is shown upside down.

  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 foam heat insulating material R is provided in the door body 11, and the urethane foam heat insulating material R is 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 so that it may adhere and contact.

  As shown in FIG. 4, 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 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.

  FIG. 5 shows a process chart in the case where a film is provided on a glass plate, where (a) shows a case where a roll-shaped film is used, and (b) shows a case where a flat film is used.

  As shown in FIG. 5A, a film 40A wound in a roll shape (corresponding to the film 100 in FIG. 9A) is formed on the base 41 and one surface of the base 41. A pressure-sensitive adhesive layer (adhesive layer) 42 and a release agent 43 formed on the other surface side are laminated.

The base material 41 is formed of PET (polyethylene terephthalate) having a surface free energy of 31 J / m ² or more. The pressure-sensitive adhesive layer 42 is, for example, acrylic and has a function that can be bonded and fixed to the coating film 30. The release agent 43 is of a silicone type or a fluorine type and has a function capable of holding the film 40A in a roll shape and capable of peeling the adhesive layer 42 when stretched from the film 40A.

  Then, the stretched film 40 </ b> A is attached to the surface of the glass plate 20 on the coating film 30 side via the adhesive layer 42. Then, the release agent 43 remaining on the film 40A is removed using a removing agent. Thereby, since the film 40 in which the release agent 43 is not formed is affixed to the coating film 30 of the glass plate 20, the urethane foam heat insulating material R (see FIGS. 3 and 4) is attached to the base material 41 of the film 40. Can be adhered to. Therefore, the film 40 and the urethane foam heat insulating material R can be bonded with a much higher adhesive force than when the heat insulating material is filled in the film 40A from which the release agent is not removed.

  5B, the film 40B includes a flat substrate 41, an adhesive layer 42 formed on one surface side of the substrate 41, and a release sheet 44 covering the adhesive layer 42. , And is configured. In this case, the release sheet 44 is peeled off, and the film 40 is attached by overlapping the surface of the adhesive layer 42 toward the coating film 30 of the glass plate 20. In the case of FIG. 5A, since the step of removing the release agent is not necessary, the manufacturing process can be simplified and the cost for removing the release agent can be reduced.

  FIG. 6 is a table showing the relationship between the film material and the surface free energy.

As shown in FIG. 6, the film 40 can select a resin having a surface free energy (surface tension) of 31 J / m ² or more as the material of the base material 41, specifically, PET (polyethylene terephthalate). It can be selected from resin, ABS (acrylonitrile / butadiene / styrene copolymer) resin and the like. Thus, by making the surface free energy 31 J / m ² or more, the adhesive force between the base material 41 (such as PET) of the film 40 and the urethane foam heat insulating material R can be improved, and the heat of the urethane foam heat insulating material R can be improved. It is possible to prevent the glass plate 20 from being peeled off (detached) from the door body 11 due to deformation of the door 5a due to shrinkage or the like.

In addition, if surface free energy is less than 31 J / m < ² >, the adhesive force between the base material of the film 40 and the urethane foam heat insulating material R is small, and it becomes difficult to prevent peeling of the glass plate 20 by deformation | transformation of the door 5a. Become.

  As described above, the refrigerator 1 of the present embodiment includes the coating film 30 provided on the back surface of the glass plate 20 having translucency (light transmission), and the film 40 provided on the back surface of the coating film 30 (no release agent). ) And a urethane foam heat insulating material R as a filler provided in the door body 11, and the film 40 and the urethane foam heat insulating material R are bonded by bringing the film 40 and the urethane foam heat insulating material R into contact with each other. doing. According to this, since the glass plate 20 can be held by the adhesive force between the urethane foam heat insulating material R and the film 40 in the region where the film 40 and the urethane foam heat insulating material R are in contact (the entire surface excluding the peripheral portion), the urethane foam Even if a force that deforms the door 5a due to heat shrinkage of the heat insulating material R or the like is applied, peeling of the glass plate 20 can be prevented.

  That is, as shown in FIG. 3, the deformation force received by the glass plate 20 due to the heat shrinkage of the urethane foam heat insulating material R is F, the adhesive force between the film 40 and the urethane foam heat insulating material R is F2, and the frame 12 Assuming that the holding force is F3, in this embodiment, since the adhesive force F2 can be increased, the relational expression F <F2 + F3 holds. Thereby, peeling of the glass plate 20 can be prevented.

  As shown in FIG. 4, when the adhesive force between the film 40 and the urethane foam heat insulating material R is F2, and the adhesive force between the film 40 and the door body 11 (holding portion 12b) by the double-sided tape 50 is F4. , F <F2 + F4, and the glass plate 20 can be prevented from peeling off.

  In the present embodiment, the relationship of F2> F4 is established. In this case, since the urethane foam heat insulating material R can be bonded to the film 40 (base material 41) having no release agent, the adhesive force F2 is higher than the adhesive force F4 in the same area (for example, 10 times or more). become). Thereby, a big effect (adhesion force) can be acquired with a small area, and it can raise efficiently rather than raising the adhesion force with the glass plate 20 side by increasing the adhesion area of the double-sided tape 50.

  By the way, as shown in FIG.7 (b), in the refrigerator with which the film 100 which has not removed the mold release agent was affixed on the glass plate 20, the outer packaging material of the vacuum heat insulating material 110 was damaged, and a hole etc. were vacant. When the inside of the heat insulating material returns to the atmospheric pressure, the glass plate 20 may be pushed out by the restoring force F10 of the vacuum heat insulating material 110, and the glass plate 20 may be peeled off. This is because the adhesive force F2 between the film 100 and the urethane foam heat insulating material R is very small, and the adhesive force F2 is smaller than the restoring force F10.

  Therefore, as illustrated in FIG. 7A, in the refrigerator 1 </ b> A including the vacuum heat insulating material 60 of the present embodiment, the vacuum heat insulating material 60 is attached to the film 40 via the 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.

  Further, the adhesive force (F2) between the film 40 (no release agent) and the urethane foam heat insulating material R is the force (F) that deforms the door 5a by the thermal shrinkage of the urethane foam heat insulating material R and the restoration of the vacuum heat insulating material 60. It is set to be larger than the force obtained by adding the force.

  In the present embodiment, since the release agent is removed or the film 40 without the release agent is provided, the film 40 and the urethane foam heat insulating material R in the regions E1 and E2 in FIG. Can be filled in a contact state. Thereby, the film 40 and the urethane foam heat insulating material R can be firmly bonded, and more than the force obtained by adding the force (F) for pushing the glass plate 20 outward and the restoring force F10 (FIG. 7 (b)). A large adhesive force can be 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 foam heat insulating material R can be bonded to each other. Also, 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.

  FIG. 8 is a cross-sectional view of the door at the position of the touch panel, (a) is the present embodiment, and (b) is a comparative example. In the following, the case where the touch panel 70 is provided on the door 2a will be described as an example. However, the touch panel 70 is not limited to the door 2a, and may be other doors, and may be provided on a plurality of doors. Also good.

  The refrigerator shown as a comparative example in FIG. 8B is provided with a coating film 30 (paint layer) on the back surface of the glass plate 20, and a colored, light-impermeable film 40 (for preventing glass scattering) on the back surface of the coating film 30. Film). Moreover, the touch panel 70 is provided in the inside of the door 2a, and the film 40 of the area | region where this touch panel 70 is arrange | positioned is notched.

  The touch panel 70 includes, for example, an operation unit that changes the setting of the refrigerator when the user touches with a finger, and a display unit that displays the content (state) set by the operation of the operation unit. In addition, illustration of the structure of a display part is abbreviate | omitted in FIG.8 (b).

  The touch panel 70 includes, for example, a film display member 72 on which display contents (characters and the like) are printed, a substrate 71 provided with a touch switch electrode portion 71a and a light emitting portion 71b such as an LED, the film display member 72 and the substrate 71, and the like. A light guide plate 73 that guides the light of the light emitting portion 71b to the display portion of the film display member 72 is provided. Although not shown, the touch panel 70 is covered with a cover member for isolating it from the urethane foam heat insulating material R. Moreover, the board | substrate 71 may be a board | substrate which did not have a touch-panel operation part and provided only light emission parts, such as LED.

  By the way, when the film 40 used for preventing glass scattering is colored (when light-opaque) as described with reference to FIG. 8B, the cutout portion is formed in the film 40 at a position corresponding to the touch panel 70. 45 needs to be formed. For this reason, there exists a possibility that the urethane foam heat insulating material R may flow into the notch part 45, and the coating film 30 may peel off.

  Therefore, in the present embodiment, as shown in FIG. 8A, a refrigerator 1B is provided in which a transparent and transparent (light-transmitting) glass scattering prevention film 40C is provided on the back surface of the coating film 30. is there. The film 40C is not limited to being colorless and transparent, and is not limited to being colorless as long as it is transparent and has light transmittance. Even in one glass, the film 40C has light transmittance only on the projection surface of the light emitting portion, and the other portions may be colored and not have light transmittance. Thereby, it is not necessary to provide the above-described notch 45 in the film 40C, and the peeling of the coating film 30 due to the penetration of the urethane foam heat insulating material R can be prevented.

  Moreover, when using the film in which the silicone resin is used as a mold release agent, there exists a possibility of producing a disabled material in operation of a touch panel. However, in this embodiment, since the film 40 without the release agent is used, it is possible to prevent the operation of the touch panel 70 from being troubled.

  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, 40B, 40C (For scattering prevention) Film 41 Base material 42 Adhesive layer (adhesive layer)
50 Double-sided tape (adhesive layer)
60 Vacuum heat insulating material 60a Core material 60b Outer coating material 61 Adhesive layer 70 Touch panel 71 Substrate 71a Electrode 71b Light emitting part 72 Film display member 73 Light guide plate R Urethane foam heat insulating material

Claims (6)

A door body that opens and closes 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 scattering prevention film provided on the back surface of the paint layer,
A refrigerator having a substrate provided with a light emitting portion on the back side of the film for preventing scattering. The refrigerator according to claim 1, wherein the scattering free film has a surface free energy of 31 J / m ² or more. The scattering prevention film is held via the door body and an adhesive layer,
The refrigerator according to claim 1 or 2, wherein an adhesive force between the scattering prevention film and the urethane foam heat insulating material is larger than an adhesive force between the decorative plate and the door body by the adhesive layer. A vacuum heat insulating material is provided on the back surface of the film for preventing scattering,
4. The adhesive force between the scattering prevention film and the urethane foam heat insulating material is larger than a pressing force for extruding the decorative plate by a restoring force of the vacuum heat insulating material. 5. The refrigerator according to item.   The refrigerator according to claim 1, wherein the scattering prevention film has a light transmission property on a light emitting portion projection surface.   The refrigerator according to claim 1, wherein the substrate has a capacitance-type touch panel.

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