JP6435522B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and particularly to a refrigerator door configuration.

  In general, this type of refrigerator is provided with a refrigerator compartment, a freezer compartment, a vegetable compartment, etc. in a refrigerator body having heat insulation properties, and each of these refrigerator compartments, freezer compartments, vegetable compartments, etc. can be opened and closed by a door.

  The door includes a front plate that is a front surface of the refrigerator body, an inner box frame that is an inner surface of a refrigerator compartment, a freezer compartment, a vegetable compartment, and the like, and a frame that integrally connects the front plate and the inner box frame. Urethane is filled and foamed between them, and it is configured to have heat insulating properties like the refrigerator body.

  In such a refrigerator, the front plate of the door greatly affects the appearance of the entire refrigerator, that is, the design, and the finish greatly affects the quality of the entire refrigerator.

  In view of this, there is a structure in which the front plate of the door is made of a glass plate in order to improve the design of the door (for example, see Patent Document 1).

  FIG. 9 shows a door proposed in the above-mentioned Patent Document 1, and its front plate 101 is composed of a colored glass plate 103 in which a colored layer 102 such as a pattern is formed by silk printing, and the colored glass plate 103 and the inner box A urethane 106 is filled and foamed between the frame 104 and the frame body 105.

Japanese Patent No. 3140110

  According to the above conventional configuration, since the transparent layer of the colored glass plate 103 is positioned in front of the colored layer 102, the color is added to the depth and the texture is increased, compared with the pre-painted plate made of metal or resin. There exists an advantage which the design property improves.

  However, since the conventional door is provided with the colored glass plate insertion portion 107 in the frame 105 and the colored glass plate 103 is fitted in the colored glass plate insertion portion 107, the edge of the colored glass plate insertion portion 107 is not attached. There existed a subject that the design property exposed using the colored glass plate 103 exposed to the front surface periphery of the colored glass plate 103 was impaired.

  In addition, very fine pride and dust are deposited on the boundary between the colored glass plate insertion portion 107 and the colored glass plate 103, and even if this fine dust or dust is to be wiped off. It cannot be wiped off completely and begins to appear linear along the edge. If the coloring of the colored glass plate 103 is white, it will be noticeable after a short period of use, and will become more noticeable as the use period becomes longer, which greatly impairs the aesthetics of the refrigerator.

  Therefore, in order to solve such a problem, the applicant considered that the colored glass insertion portion 107 of the frame 105 was abolished and the end portion of the colored glass plate 103 was left exposed.

In such a configuration, the colored glass plate 103 is held only by the adhesive force with the urethane foam 106, and the colored glass plate 103, which is heavier than the metal or resin front plate, is kept for a long time. Therefore, it is necessary to ensure that the urethane foam 106 is adhered and held over the entire area.

  Therefore, the applicant tried a life acceleration test of the adhesive force between the colored glass plate 103 and the foamed urethane 106. As a result, the colored layer formed by silk printing or the like on the glass plate 103 has a variation in adhesive strength with the glass plate, and the colored layer 102 foams when the adhesive state deteriorates due to thermal shrinkage or aging of the urethane foam 106. It has been found that it is difficult to ensure the adhesive strength between the glass plate and the urethane foam 106 over a long period of time by peeling off from the glass plate together with the urethane 106.

  The present invention has been made in view of the above points, and can ensure the adhesive strength of a transparent front plate such as a glass plate over a long period of time, and enhance the design and maintain its high design. A refrigerator with a door is provided.

In order to achieve the above object, the refrigerator of the present invention includes a refrigerator main body having heat insulation performance, a storage chamber provided in the refrigerator main body, and a heat insulating door capable of opening and closing the opening of the storage chamber. The heat insulating door includes an inner box frame, an edge frame, a glass plate, and urethane filled and foamed in a space between the inner box frame, the edge frame, and the glass plate. the glass plate is bonded held by said urethane, said edge frame is provided with a support piece for supporting the glass plate at a portion located at the lower end surface of the glass plate, and the support piece, of the glass plate It is located on the inner side of the refrigerator than the front.

Thereby, the adhesive strength of the glass plate can be maintained and ensured, and the reliability can be enhanced, and the design and safety of the door can be enhanced.

  ADVANTAGE OF THE INVENTION This invention can provide the refrigerator with a door which can maintain the adhesive force of a transparent front board and foaming urethane over a long period of time, can improve the designability, and can also hold | maintain the high designability for a long time.

External appearance perspective view of the refrigerator in Embodiment 1 of this invention Cross section of the refrigerator Perspective view showing one of the doors of the refrigerator Exploded perspective view of the refrigerator door AA sectional view of FIG. BB sectional view of FIG. Sectional drawing which shows the door of the refrigerator in Embodiment 2 Sectional drawing which shows the door of the refrigerator in Embodiment 3 Sectional view of a door in a conventional refrigerator

1st invention is a refrigerator provided with the refrigerator main body which has heat insulation performance, the storage chamber provided in the said refrigerator main body, and the heat insulation door which can open and close the opening part of the said storage chamber, Comprising: The said heat insulation door is the said heat insulation door. An inner box frame, an edge frame, a glass plate, and urethane filled and foamed in a space between the inner box frame and the edge frame and the glass plate, and the glass plate is bonded and held by the urethane. is, the edge frame is provided with a support piece for supporting the glass plate at a portion located at the lower end surface of the glass plate, the support piece is located in compartment inside the refrigerator than the front surface of the glass plate By doing so, the refrigerator with a door which can maintain the adhesive force of a glass plate and a foam heat insulating material over a long period of time, can improve the design property, and can also hold | maintain the high design property for a long time can be provided. According to a second aspect of the present invention, a resin film is provided on the inner surface side of the glass plate , and the urethane adheres and holds the glass plate via the resin film. in which the colored layer is provided on the inner surface side. Therefore, the designability and safety of the door can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is an external perspective view of the refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a sectional view of the refrigerator, FIG. 3 is a perspective view showing one of the doors of the refrigerator, and FIG. 4 is an exploded view of the refrigerator door. 5 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 6 is a cross-sectional view taken along the line BB in FIG.

  1 and 2, the refrigerator body 1 includes a metal (for example, iron plate) outer box 2 that opens forward, an inner box 3 that is made of hard resin (for example, ABS), an outer box 2, and an inner box 3. It consists of the hard foaming urethane 4 foam-filled between. The refrigerator body 1 includes a refrigerator compartment 5, a switching chamber 6 located under the refrigerator compartment 5, an ice making chamber 7 arranged in parallel with the switching chamber 6, and a switching chamber 6 and a lower portion of the ice making chamber 7. A freezer compartment 8 and a vegetable compartment 9 located below the freezer compartment 8. Further, the front surface of the refrigerator compartment 5 is opened and closed freely by, for example, double doors 10 and 10, and the front portions of the switching chamber 6, the ice making chamber 7, the freezer compartment 8 and the vegetable compartment 9 are drawn out doors 11 and 10. 12, 13 and 14 are closed freely.

  There is a cooling chamber 16 on the back surface of the refrigerator body 1, and a cooler 17 that generates cool air and a blower fan 18 that supplies the cool air to each chamber are provided. In addition, a compressor 19 is provided at the back of the top of the main body of the refrigerator body 1, and a condenser (not shown), a heat radiating pipe 20, a capillary tube 21, and the cooler 17 described above are provided. A refrigerant is enclosed in a refrigeration cycle that is sequentially connected in an annular manner, and a cooling operation is performed.

  Here, each of the doors 10 to 14 is foamed and filled with hard urethane like the refrigerator body 1 so as to have heat insulation properties, and its front surface is made of a transparent front plate such as a glass plate in order to further improve the design. It is.

  Hereinafter, the structure of the door 10 will be described with reference to FIGS. The doors 11 to 14 other than the door 10 have the same configuration.

  3 to 6, reference numeral 23 denotes an inner box frame that is positioned inside the refrigerator body 1 and is formed of, for example, ABS resin. Reference numeral 24 denotes an edge frame bonded and fixed to the peripheral end surface of the inner box frame 23, and is formed of ABS resin. Reference numeral 25 denotes a transparent front plate (hereinafter referred to as a glass plate) such as a glass plate laminated on the edge frame 24 so as to cover the inner box frame 23. In this embodiment, it is formed of a glossy tempered glass plate. It is.

As shown in FIGS. 5 and 6, the glass plate 25 has a resin film 27 attached to the inner surface of the glass plate 25 with an adhesive 26. The resin film 27 has a pattern such as a metallic pattern such as a hairline. A colored layer 28 is formed. As a result, the glass plate 25 becomes a glass plate with a colored layer. In this embodiment, the resin film 27 is made of polyethylene terephthalate having high transparency and high mechanical strength, and the colored layer 28 is formed on the side opposite to the glass plate 25 in the white system and on the glass plate 25 side in the gray system. It is formed. In the drawing, the case where it is formed on the side opposite to the glass plate 25 is shown.

  In addition, when emphasizing the hairline three-dimensionally, a concave and convex groove is provided on the surface of the resin film opposite to the colored layer formed on the glass plate 25 side to form a three-dimensional hairline on the surface. A chromium deposition layer is formed. As a result, the design properties can be improved, and by using chromium as the material of the vapor deposition layer, the rust generation of the vapor deposition layer starting from the end surfaces of the film and the vapor deposition layer can be prevented, and the durability of the pattern is improved. .

  29 is a hard urethane filled and foamed in a space between the surface of the glass plate 25 on the side of the resin film 27 and the inner box frame 23 and the edge frame 24, and the glass together with the inner box frame 23 and the edge frame 24 by foaming. The glass plate 25 is adhered to and held on the resin film 27 on the inner surface of the plate 25 via the resin film 27.

  Here, the foamed urethane 29 has a foam density set higher in the outer peripheral portion than in the central portion of the glass plate 25.

  Further, the edge frame 24 of the inner box frame 23 does not have the colored glass plate insertion portion as described in the conventional example, and the outer peripheral edge of the glass plate 25 is the edge frame 24 as shown in FIG. In this embodiment, the end face 24a is located slightly inward or slightly inward of the end face 24a.

  In addition, in this embodiment, as shown in FIG. 5, a portion of the edge frame 24 of the inner box frame 23 that is located on the lower end surface of the glass plate 25 substantially protrudes forward from the front surface of the glass plate 25. A transparent front plate support piece (hereinafter referred to as a glass plate support piece) 24b that is polymerized on the lower end surface of the glass plate with a margin of protrusion of 2 mm or less forward from the front surface of the glass plate 25 having a size that does not occur is provided. It is configured to support the weight of the plate 25.

  In the above-described configuration, the refrigerator door 10 has a colored layer 28 made of a metallic pattern such as a hairline located inside the transparent layer made of the glass plate 25 and the resin film 27. The design is greatly improved compared to a pre-painted plate made of metal or resin. Particularly in this embodiment, since the colored layer 28 is formed on the resin film 27, the colored layer 28 can be formed by a roller or the like, and if the colored layer is silk-printed directly on a glass plate, the defective rate is substantially high. A fine pattern such as a hairline that could not be obtained can also be formed, and the design can be remarkably improved.

  In addition, since the colored layer 28 can be formed by a roller or the like, the adhesive strength to the resin film 27 can be managed and ensured even if the adhesive state deteriorates due to thermal shrinkage or aging of urethane foam. 27 can be reliably prevented from being peeled off.

  As a result, when the resin film 27 is positioned between the glass plate 25 and the urethane foam 29 and both are adhered by the adhesive force of the urethane foam 29 and the adhesive 26, the colored layer 28 is peeled off from the resin film 27. It is possible to prevent the glass plate 25 from being peeled off from the foamed urethane 29 due to the peeling. Therefore, the adhesive strength of the glass plate with film 25 can be maintained and secured over a long period of time, and the reliability can be ensured.

In addition, in this embodiment, the foaming density of the urethane foam 29 is set to be higher in the outer peripheral portion than in the central portion of the glass plate 25.
The outer peripheral portion of 5 is stronger. Thereby, the adhesive force between the resin film 27 of the glass plate 25 and the urethane foam 29 can be more reliably maintained and secured over a long period of time.

  That is, the refrigerator has a large temperature difference between the inside and the outside, and the end of the glass plate 25 of the door is affected by condensation and severe temperature changes due to the cold air from the inside when the door is opened and closed. Further, depending on the usage of the user, the door may be subjected to a severe impact during opening and closing, or the door including the glass plate 25 may overflow with water or juice when the stored items are put in and out. The end portion of the glass plate 25 is easily peeled off from the urethane foam 29 if there is no glass plate insertion portion that covers the end portion of the glass plate due to the use environment / actual condition unique to the refrigerator.

  Under such circumstances, in the present invention, the end portion of the glass plate 25, that is, the peripheral portion, is bonded to the urethane skin layer in which the foaming density of the foamed urethane 29 is high, that is, very finely foamed. The adhesive density between the urethane foam 29 and the resin film 27 on the glass plate 25 is high and strong. Therefore, even when used for a long time, the adhesion between the resin film 27 of the glass plate 25 and the urethane foam 29 is ensured, and the adhesive strength of the glass plate 25 with the film can be maintained and ensured for a long time, so that the reliability can be ensured. is there.

The adhesive force between the glass plate 25 and the urethane foam 29 was subjected to a life acceleration test, and as a result, the adhesive force was set to 1.0 g / cm 2 or more, preferably 2.6 g / cm 2 or more. The adhesive strength between the resin film 27 and the urethane foam 29 can be reliably ensured even if the adhesive strength is deteriorated due to secular change such as shrinkage, and as a result, the adhesive strength of the glass plate 25 is maintained and guaranteed over a long period of time. It was possible to make it highly reliable.

  The method for measuring the adhesive force is based on “JIS K 6850 (Adhesive—Tensile Shear Adhesive Tensile Shear Adhesive Strength Test Method)”, which is a standard method for measuring the overlapping shear adhesive strength of an adhesive.

  In this embodiment, the resin film 27 is formed of a polyethylene terephthalate film. Since this polyethylene terephthalate has high mechanical strength, the film itself is broken by the secular change accompanying the thermal contraction of the urethane foam 29, and the broken portion It is possible to prevent the peeling of the adhesion of the resin film 27 to the urethane foam 29 from progressing over time, and to ensure the reliability of maintaining the adhesion strength.

  On the other hand, since this door can abolish the conventional glass plate insertion portion covering the peripheral edge of the glass plate by maintaining the adhesive strength, it does not impair the design like the one with the glass plate insertion portion. It is possible to have a clean appearance with a flat feeling on the entire surface. In addition, dust or dust adheres and accumulates at the boundary between the glass plate insertion portion and the glass plate, and this does not stand out linearly, maintaining the initial high design as it is for a long period of time. be able to.

Further, in this embodiment, a portion of the edge frame 24 of the inner box frame 23 positioned on the lower end surface of the glass plate 25 is superposed on the lower end surface of the glass plate without substantially jumping forward from the front surface of the glass plate 25. Since the glass plate support piece 24b is positioned, the weight of the glass plate 25 is supported by the glass plate support piece 24b of the edge frame 24 of the inner box frame 23. Therefore, even if the peeling of the glass plate 25 may partially occur due to the deterioration of the adhesive force of the glass plate 25 by the urethane foam 29, an abnormal situation such as the dropping of the glass plate 25 is surely prevented. Yes, the feeling of security is greatly improved. Further, since the glass plate support piece 24b of the edge frame 24 does not substantially protrude from the front surface of the glass plate, it is not visible from the front surface of the door as in the glass plate insertion portion, and the design and the flatness of the entire surface are kept good. it can. Needless to say, the dust and dust non-adhesive effect does not change as long as the protrusions are so small that dust does not accumulate during wiping.

  In particular, in this embodiment, since the outer peripheral edge of the glass plate 25 is positioned slightly inside the end surface 24a of the edge frame 24, the end surface 24a of the edge frame 24 protects the outer peripheral edge of the glass plate 25. Become. Therefore, for example, it is possible to prevent the outer peripheral edge of the glass plate 25 from hitting a certain object and cracking at the time of door transportation on the production line or door replacement service at the user's house. That is, even if the glass plate insertion portion for holding the glass plate 25 is abolished, the outer peripheral portion of the glass plate can be prevented from being damaged and can be used with confidence.

  Even if some external force is applied to the glass plate 25 and it should break, this glass plate piece is adhered to the resin film 27 to prevent scattering, and safety in the event of an emergency is also improved. To do.

(Embodiment 2)
FIG. 7 is a sectional view of a door in the second embodiment. In the second embodiment, the adhesive force between the resin film 27 of the glass plate 25 and the urethane foam 29 is further increased.

  That is, the adhesive 30 is also applied to the surface of the resin film 27 on the urethane foam side, and urethane is filled and foamed from above the adhesive 30, and the resin film 27 and the urethane foam 29 are connected via the adhesive 30. And are bonded together.

  Thereby, the adhesive strength in the center part of the glass plate where the foaming density of urethane is low and the substantial adhesion area between the urethane foam 29 and the resin film 27 is reduced can be improved. That is, the adhesive density between the urethane foam 29 and the resin film 27 is increased by covering the portion where the foaming density of the urethane is low and the substantial adhesion area between the urethane foam 29 and the resin film 27 is reduced by adhesion with the adhesive 30. It can be ensured reliably, and as a result, the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time, and can be made highly reliable.

  In addition, when the microscopic surface of the adhesive surface between the resin film 27 and the urethane foam 29 is seen, the skin layer of the urethane foam and the resin film 27 are adhered to each other. Since the surface is a smooth surface, there is a risk of peeling at once if it is peeled off. In particular, when the foaming density of the outer peripheral portion of the glass plate is increased and the adhesive surface is used as a skin layer, there is a risk that peeling will spread at the outer peripheral portion of the glass plate.

  However, when the adhesive 30 is interposed between the adhesive surface of the resin film 27 and the urethane foam 29 as in this embodiment, the adhesive strength between the resin film 27 and the urethane foam 29 becomes high, and the foaming as described above. The spread of peeling between the skin layer of the urethane 29 and the resin film 27 can be prevented.

In particular, as illustrated in this embodiment, when a urethane adhesive or a polyester adhesive is used as the adhesive 30, the urethane or polyester constituting the urethane or polyester adhesive has its solubility parameter. (Hereinafter referred to as the SP value) is close to the SP value 10-11 of urethane and the SP value 11.3 of polyethylene terephthalate, which is the film material, so that the adhesive strength between these becomes stronger and the adhesive strength thereof. Maintenance is extremely high. In other words, a polyester-based resin (also acrylic-based resin) has an —OH group reacted with an isocyanate at the end to form a urethane-modified resin film, while a urethane foam is an isocyanate-cured polyether polyol. Although the basic resin skeleton is different, the reaction content is the same, so the adhesive strength is improved. Therefore, the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time, and the reliability can be further enhanced.

(Embodiment 3)
FIG. 8 is a sectional view of a door in the third embodiment. In the third embodiment, the resin film 27 of the glass plate 25 and the edge frame 24 of the inner box frame 23 are further bonded with a double-sided tape 33.

  As a result, the glass plate 25 is bonded to the edge frame 24 via the double-sided tape 33 in addition to bonding to the urethane foam 29. Therefore, the glass plate 25 is strongly bonded and held to both the urethane foam 29 and the edge frame 24 through the resin film 27, and the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time. Further, it can be made more reliable.

  As mentioned above, although main embodiment of this invention was described, the said embodiment was shown as an example in implementing this invention, and can be variously changed within the range which achieves the objective of this invention. Needless to say.

For example, the glass plate may be replaced with a transparent resin plate, which makes it possible to further secure the adhesive strength by reducing the weight and to reduce the cost. Further, the resin film may be other than polyethylene terephthalate as long as the adhesive strength of the colored layer can be controlled.

  Further, the colored layer 28 of the resin film 27 may be on the glass plate side as described above, and a urethane binder or an adhesive 30 used for improving the adhesive strength between the resin film 27 and the urethane foam 29 may be used. A vapor-deposited layer may be used, or a vapor-deposited layer and / or a urethane binder may be further interposed between the adhesive 30 and the foamed urethane 29. Designability can be improved.

  As described above, the present invention can guarantee the adhesive force between the transparent front plate of the door and the urethane foam over a long period of time, can enhance the designability, and can maintain the high designability for a long time. Of course, it can be widely applied to commercial refrigerators and wine coolers.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Outer box 3 Inner box 4 Urethane 5 Refrigeration room 6 Switching room 7 Ice making room 8 Freezing room 9 Vegetable room 10, 11, 12, 13, 14 Door 16 Cooling room 17 Cooler 18 Blower 19 Compressor 20 Heat radiation Pipe 21 Capillary tube 23 Inner box frame 24 Edge frame 24a End face 24b Transparent front plate support piece (glass plate support piece)
25 Transparent front plate (glass plate)
26 Adhesive 27 Resin film 28 Colored layer 29 Urethane foam 30 Adhesive 33 Double-sided tape

Claims (3)

A refrigerator body having a heat insulation performance, a storage room provided in the refrigerator body, and a heat insulation door capable of opening and closing an opening of the storage room, wherein the heat insulation door includes an inner box frame, An edge frame, a glass plate, and urethane filled and foamed in a space between the inner box frame and the edge frame and the glass plate , the glass plate is bonded and held by the urethane, and the edge frame is , a support piece for supporting the glass plate at a portion located at the lower end surface of the glass plate, the support piece is characterized by than the front surface of the glass plate located on the refrigerator inside the refrigerator refrigerator. The refrigerator according to claim 1, wherein a resin film is provided on an inner surface side of the glass plate, and the urethane adheres and holds the glass plate through the resin film. The refrigerator according to claim 2, wherein a colored layer is provided on an inner surface side of the resin film.

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