JP2014066513A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator with a door that enables prevention of deformation of a transparent front plate on a door front surface.SOLUTION: A door of a refrigerator body 1 having thermal insulation properties includes: an inner frame 23 located inside a storage compartment; a transparent front plate 25 that is disposed in an edge frame 24 of the inner frame 23 and contains a colored layer of a glass plate; and urethane foam 29 filled and foamed in a space between the transparent front plate 25 and the edge frame 24 of the inner fame 23. The transparent front plate 25 is held by the urethane foam 29 in a bonding state, and the outer periphery of the transparent front plate 25 is not covered with a transparent front plate inserting portion, etc., so as to be exposed without change. A vacuum heat insulating material 30 is embedded in the urethane foam between the inner frame 23 and the transparent front plate 25 via a positioning spacer, so as to prevent deformation of the transparent front plate 25 caused by thermal shrinkage of the urethane foam. This configuration can enhance design performance and prevent occurrence of deformation, etc. of the transparent front plate caused by secular thermal shrinkage of the urethane foam, so as to successfully maintain high design performance specific to the colored transparent front plate for a long time.

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 is urethane between a front plate that is the front surface of the refrigerator body, an inner frame that is an inner surface of a refrigerator compartment, a freezer compartment, a vegetable compartment, etc., and a frame that integrally connects the front plate and the inner frame. Is filled and foamed so that it has the same heat insulation as the refrigerator main 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. 8 shows the 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 frame. A urethane 106 is filled and foamed between the frame 104 and the frame 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 body 105 and the colored glass plate 103 is held in the colored glass plate insertion portion 107 by inserting the colored glass plate 103, the colored glass plate 103 The edge part of the insertion part 107 was exposed to the front surface periphery of the colored glass plate 103, and there existed a subject that the designability improved using 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 abolished the colored glass insertion portion 107 of the frame body 105, and bonded and held the colored glass plate 103 with the adhesive force of the urethane foam 106, so that the end portion of the colored glass plate 103 was retained. We made a prototype with the exposed state as it was, and performed a life acceleration test.

  As a result, this door is warped in the colored glass plate 103 due to the thermal shrinkage of the urethane foam 106 or is partially peeled between the colored glass plate 103 and the urethane foam 106 during long-term use. It has been found that problems such as these occur. This is because the urethane foam 106 is cooled on the inside of the door and is at the same temperature as the outside air temperature on the outside of the door, and heat shrinks on the inside of the door, but the outside remains as it is. It is presumed that it is deformed, that is, deformed in a drum shape. And it is estimated that peeling may arise between both in the part which cannot carry out the deformation | transformation deformation | transformation of the colored glass plate 103 to the thermal contraction of this urethane foam 106. FIG.

  It is considered that such a problem can be solved by providing a reinforcing plate on the back side of the colored glass plate 103 to reinforce the entire door. In that case, the colored glass plate 103 is adhered and held to urethane foam. Therefore, it is necessary to provide the colored glass plate insertion portion 107 in the frame 105 and hold the colored glass plate 103 in the colored glass plate insertion portion 107 as in the conventional case. The part is exposed around the front surface of the colored glass plate 103, and the problem that the designability is impaired remains.

  The present invention has been made in view of such points, while eliminating the transparent front plate insertion portion such as the colored glass plate and improving the design, while preventing the warp deformation of the colored glass plate, unique to the colored glass plate The refrigerator with a door which can continue maintaining the high designability of this in good condition over a long period of time is provided.

  In order to achieve the above object, the present invention comprises a refrigerator main body and a door having heat insulation properties, and the door is provided on an inner frame located inside a storage room and an edge frame of the inner frame so as to cover the inner frame. A transparent front plate with a colored layer of a glass plate disposed, and urethane foam filled and foamed in a space between the transparent front plate, an inner frame and an edge frame, and the transparent front plate is bonded by the foamed urethane. The outer peripheral portion is held without being covered with a transparent front plate insertion portion or the like, and is exposed as it is, and a vacuum heat insulating material is provided via a positioning spacer in urethane foam between the inner frame and the transparent front plate. Is embedded to prevent deformation of the transparent front plate due to thermal shrinkage of the urethane foam.

  Thereby, while being able to demonstrate the high texture by having used the transparent front plate, the transparent front plate can be bonded and held by foamed urethane, the transparent front plate insertion part can be eliminated, and the design can be improved, and Nevertheless, even if the transparent front plate is adhered and held to the foamed urethane, deformation of the transparent front plate due to the thermal shrinkage of the foamed urethane does not occur, and the high design characteristic unique to the colored transparent front plate is good for a long time You can continue to maintain.

  The present invention eliminates a transparent front plate insertion portion such as a colored glass plate to improve design properties, prevents deformation of the colored transparent front plate, and has good high design properties unique to the transparent front plate over a long period of time. It is possible to provide a refrigerator with a door that can continue to be maintained.

External appearance perspective view of the refrigerator in Embodiment 1 of this invention Schematic sectional view 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 view of a door in a conventional refrigerator

  1st invention consists of the refrigerator main body and door which have heat insulation, and the said glass is the glass plate arrange | positioned in the edge frame of the inner frame so that the said door may cover the said inner frame located inside a storage room A transparent front plate with a colored layer, and urethane foam filled and foamed in a space between the transparent front plate, the inner frame, and the edge frame, and the transparent front plate is bonded and held by the foamed urethane. The part is exposed without being covered with a transparent front plate insertion part, etc., and a vacuum heat insulating material is embedded in the urethane foam between the inner frame and the transparent front plate via a positioning spacer. The deformation of the transparent front plate due to thermal shrinkage of the urethane foam is prevented.

  Thereby, while being able to demonstrate the high texture by having used the transparent front plate, the transparent front plate can be bonded and held by foamed urethane, the transparent front plate insertion part can be eliminated, and the design can be improved, and Nevertheless, even if the transparent front plate is adhered and held to the foamed urethane, deformation of the transparent front plate due to the thermal shrinkage of the foamed urethane does not occur, and the high design characteristic unique to the colored transparent front plate is good for a long time You can continue to maintain.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 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 schematic sectional view of the refrigerator, FIG. 3 is a perspective view showing one of the doors of the refrigerator, and FIG. FIG. 5 is an AA cross-sectional view of FIG. 3 and FIG. 6 is a BB cross-sectional view of 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 main body 1 is located inside the refrigerator compartment 5, the switching chamber 6 located below the refrigerator compartment 5, the ice making chamber 7 juxtaposed to the switching chamber 6, and the switching chamber 6 and the lower part of the ice making chamber 7. It has 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, 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 13 will be described as an example with reference to FIGS. The doors 10 to 14 other than the door 13 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 face of the inner 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 frame 23, and in this embodiment, it is formed of a glossy tempered glass plate. is there.

  As shown in FIGS. 5 and 6, a resin film 27 is attached to the inner surface of the glass plate 25 via an adhesive 26. The resin film 27 is made of a picture pattern, for example, 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.

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

  Here, the edge frame 24 of the inner frame 23 does not have the colored glass plate insertion portion as described in the conventional example, and the glass plate 25 has a configuration in which the outer peripheral portion is exposed as it is. Further, the glass plate 25 has a configuration in which the outer peripheral edge is positioned slightly inside the end face 24a of the edge frame 24 as shown in FIG.

  Reference numeral 30 denotes a plate body that is embedded and disposed almost over the entire area between the inner frame 23 and the glass plate 25, and has a higher heat insulating property than the urethane foam 29 filled between the glass plate 25 and the inner frame 23. Made of material. In this embodiment, it is composed of a vacuum heat insulating material, and the plate body is hereinafter referred to as a vacuum heat insulating material. The vacuum heat insulating material 30 is located near the glass plate between the inner frame 23 and the glass plate 25, and the thickness of the urethane foam 29a between the vacuum heat insulating material 30 and the inner frame 23 as shown in FIG. T is thicker than the thickness t of the urethane foam 29b between the vacuum heat insulating material 30 and the glass plate 25. In the figure, reference numeral 30a denotes a spacer member for positioning the plate 30.

  Further, 31 is a handle portion formed by forming a downward concave portion on the upper end surface of the door edge frame 24, and the vacuum heat insulating material 30 is disposed below the position close to the concave bottom 31a of the handle portion 31. . The handle portion 31 may be formed by forming an upward concave portion on the lower end surface of the door edge frame 24. In that case, the vacuum heat insulating material 30 is disposed above the position close to the concave bottom 31a of the handle portion 31. become.

  Moreover, the said handle part 31 is made into the inclined surface which is located in a door inner side, so that the concave back wall 31b goes to the door edge X, and also the concave front wall 31c goes to the downward direction from the door edge X. The wall pressure is increased to improve the strength.

  On the other hand, in this embodiment, a configuration for ensuring the adhesion and holding of the glass plate 25 which is concerned by eliminating the glass plate insertion portion that holds the outer peripheral portion of the glass plate 25 is provided, and the configuration will be described below. .

First, the glass plate 25 is formed as a colored glass plate by attaching the resin film 27 on which the colored layer 28 is formed with the adhesive 26 as described above. An easy adhesion layer 32 is formed on the surface of the resin film 27 on the urethane foam side, and the resin film 27 is bonded to the urethane foam 29 via the easy adhesion layer 32. The easy-adhesion layer 32 can be formed by subjecting the surface of the resin film 27 to corona treatment or plasma treatment, or applying a polyester or urethane adhesive. In this embodiment, a polyester adhesive is applied.

  Further, the foamed urethane 29 filled and foamed in the space between the surface of the glass plate 25 on the side of the resin film 27 and the inner frame 23 and the edge frame 24 has a foaming density of the outer peripheral portion from the central portion of the glass plate 25. Is set higher.

  Furthermore, in this embodiment, as shown in FIG. 5, a portion of the edge frame 24 of the inner 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 protrudes to a position within 2 mm from the front surface of the glass plate 25 and superposes on the lower end surface of the glass plate is provided. It is configured to support 25 weights.

  In the refrigerator door 10 configured as described above, the colored layer 28 made of a metal-like pattern such as a hairline is located inside the transparent layer made of the glass plate 25 and the resin film 27, so that the color of the color has a depth. In addition, the design is greatly improved compared to the 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 be formed, and its design can be remarkably improved.

  Moreover, this door eliminates the conventional glass plate insertion portion that covers the peripheral edge of the glass plate by adhering and holding the glass plate 25 with the adhesive force of the urethane foam 29, so that there is a glass plate insertion portion. In this way, the design can be made without any loss and a clean appearance with a flat feeling on the entire surface can be obtained. 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.

  Moreover, when emphasizing the hairline three-dimensionally, an uneven groove is provided on the surface of the resin film 27 opposite to the colored layer 28 formed on the glass plate 25 side to form a three-dimensional hairline, A chromium vapor deposition layer (not shown) may be formed on the surface. Thereby, a hairline becomes three-dimensional and can improve the designability. At that time, by using chromium as the material of the vapor deposition layer, it is possible to prevent the rust of the vapor deposition layer starting from the end surfaces of the resin film 27 and the vapor deposition layer, and to improve the durability of the pattern.

  On the other hand, since the vacuum heat insulating material 30 is embedded in the foamed urethane 29 between the inner frame 23 and the glass plate 25, the door is foamed even if the glass plate 25 is bonded and held to the foamed urethane 29. The warp deformation of the glass plate 25 due to the thermal shrinkage of the urethane 29 can be prevented. Therefore, warp deformation or the like does not occur over a long period of time, and it is possible to continue to maintain a high design characteristic unique to the colored glass plate.

  That is, the foamed urethane 29 is foamed while the filled urethane flows around the vacuum heat insulating plate 30 and flows from the glass plate 25 side to the inner frame 23 side, so the urethane foam 29a and the glass plate 25 on the inner frame 23 side are foamed. A difference occurs in the foaming density with the foamed urethane 29b on the side, the foaming density on the inner frame 23 side is increased, and the amount of urethane is also increased. Therefore, the urethane foam 29a on the inner frame 23 side is less likely to cause thermal shrinkage than the urethane foam 29b on the glass plate 25 side. And since the foamed urethane 29b on the inner frame 23 side is cooled by the cold air from the inside of the refrigerator and tends to cause heat shrinkage, the foamed urethane 29b on the inner frame 23 side that is easily heat shrunk is made difficult to heat shrink. Therefore, the warp deformation as a whole of the door is small or hardly occurs, so that the warp deformation of the glass plate 25 over time can be prevented.

  In addition, the glass plate 25 has a large specific heat, and once cooled by heat transfer from the foamed urethane 29 or the inner frame 23, the glass plate 25 comes into contact with the high humidity outside air or the cold air when the door is opened and closed, and it is easy to sweat. However, heat transfer is blocked by the vacuum heat insulating material 30 and sweating can be prevented.

  In addition, since the vacuum heat insulating material 30 has high rigidity, even if the urethane foam 29a and 29b on the inner frame 23 side and the glass plate 25 side cause some thermal shrinkage, the warp deformation of the entire door is surely prevented against this. In addition, the strength of the entire door is also improved, and the door can be made less warped. Moreover, the vacuum heat insulating material 30 greatly improves the heat insulating property of the door, and accordingly, the thickness of the door, that is, the thickness of the urethane foam 29 is reduced to suppress the heat shrinkage force of the urethane foam, Contributes to eliminating warping deformation.

  Furthermore, in this embodiment, since the thickness T of the urethane foam 29a between the inner frame 23 is configured to be thicker than the thickness t of the urethane foam 29b between the vacuum heat insulating material 30 and the glass plate 25, The amount of urethane on the inner frame 23 side is increased, and the foamed urethane 29b on the inner frame 23 side is less likely to cause heat shrinkage, so that the deformation of the glass plate 25 can be more reliably prevented.

  It is better to reduce the thickness t of the foamed urethane 29b on the glass plate 25 side and increase the thickness T of the foamed urethane 29a on the inner frame 23 side. The thickness t is preferably 5 to 40 mm because the glass plate 25 needs to be held. This prevents the warp deformation of the glass plate 25 and ensures the adhesion and holding of the glass plate 25.

  Further, the door is formed with a handle 31 by recessing the upper end surface (or either of the lower end surfaces) of the edge frame 24 downward (or upward), and the vacuum heat insulating material 30 is on the handle portion 31 side. The end portion is arranged below (or above) the position close to the concave bottom 31 a of the handle portion 31. Thereby, the vacuum heat insulating material 30 is located in a portion corresponding to the glass plate 25 positioned below the concavely formed handle portion 31 and can effectively improve the strength of almost the entire area of the glass plate 25. . In addition, the vacuum heat insulating material 30 is extended to the handle portion 31 where the glass plate 25 is not located and the warp deformation of the glass plate 25 is not required to be prevented, and the material is not wasted, and the cost is low. Deformation prevention and strength improvement can be realized.

  Further, since the recessed inner wall 31b of the handle portion 31 is inclined so as to be located inward of the door as it goes to the door edge X, the foamed urethane 29a on the inner frame 23 side is slightly warped by heat shrinkage. Even if the handle portion 31 is deformed, the deformation is deformed inwardly toward the door edge X, that is, deformed in the same direction as the inclination of the inclined surface of the recessed back wall 31b of the handle portion 31. Therefore, it becomes almost inconspicuous, and there is no loss of designability, and good designability can be maintained over a long period of time.

  Further, the concave front wall 31c of the handle portion 31 has a wall pressure that is thicker downward (or upward) than the door edge X. In this embodiment, the wall increases as it goes downward (or upward) from the door edge X. Since the pressure is formed thickly, the strength of the concave front wall 31c, which is the handle portion of the handle portion 31, is improved, and even if a large door opening force is applied to the end portion of the glass plate 25 located in front of the handle portion. It is possible to prevent the end portion of the glass plate 25 from being cracked, and it is possible to achieve high reliability as well as design properties.

In this embodiment, as already described, a resin film 27 is attached to the inner surface of the glass plate 25 via an adhesive 26, and a colored layer 28 is formed on the resin film 27. Since the layer 28 can be formed by a roller or the like, the adhesive strength with respect to the resin film 27 can be managed and ensured even if the adhesive state deteriorates due to thermal shrinkage or aging of the urethane foam 29. It is possible to reliably prevent peeling.

  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 improved.

  In addition, in this embodiment, the foaming density of the urethane foam 29 is higher in the outer peripheral portion than in the central portion of the glass plate 25, so that the adhesive strength of the urethane foam 29 is higher in the outer peripheral portion of the glass plate 25. Become 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 this embodiment, 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 urethane foam 29 is high, that is, very finely foamed. In addition, the adhesive density between the urethane foam 29 and the resin film 27 of 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.

  In addition, in this embodiment, since the easy-adhesion layer 32 is formed on the adhesive surface of the resin film 27 with the foamed urethane 29, the adhesive strength between the resin film 27 and the foamed urethane 29 becomes higher, and the foamed urethane. It is possible to more reliably prevent the resin film 27 from 29, and hence the glass plate 25, from peeling off, and to maintain and ensure the adhesive strength of the glass plate 25 with a film for a long time.

  In particular, as exemplified in this embodiment, when polyethylene terephthalate is used as the resin film 27 and the easy-adhesion layer 32 is a urethane polyester adhesive, the adhesive strength becomes strong. That is, the urethane-based or polyester constituting the urethane-based adhesive or the polyester-based adhesive has a solubility parameter (hereinafter referred to as SP value) of urethane SP value 10-11 and polyethylene terephthalate which is a film material. Since the SP value is close to 11.3, the adhesive force between them becomes strong. In other words, the polyester-based (urethane-based) adhesive has an —OH group reacted with isocyanate at the end to form a urethane-modified resin film, while the urethane foam is an isocyanate-cured polyether polyol. Therefore, although the basic resin skeleton is different, the reaction content is the same, so the adhesive strength is improved. Therefore, even when used for a long period of time, the adhesion between the resin film 27 of the glass plate 25 and the urethane foam 29 can be ensured, and the adhesion strength of the glass plate 25 with a film can be maintained and ensured for a long period of time.

  In addition, the microscopic surface of the adhesive surface between the resin film 27 and the foamed urethane 29 is bonded to the urethane foam skin layer and the resin film 27. The skin layer and the resin film 27 are both of them. 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, in this embodiment, as described above, since the easy adhesion layer 32 is formed on the adhesive surface of the resin film 27 with the urethane foam 29, the adhesive strength between the resin film 27 and the urethane foam 29 is enhanced, The spread of peeling between the foamed urethane skin layer and the resin film 27 can be prevented. Therefore, the adhesive strength between the resin film 27 on the inner surface of the glass plate and the urethane foam 29 can be maintained and ensured over a long period of time, and the reliability can be further improved.

  Further, the adhesive strength can be improved even at the central portion of the glass plate where the foam density of urethane is low and the substantial adhesion area between the urethane foam 29 and the resin film 27 is reduced. In other words, the portion of the urethane foam 29 having a low foaming density and the substantial adhesion area between the foamed urethane 29 and the resin film 27 is reduced by covering the adhesive force with the easy-adhesive layer 32, thereby adhering the foamed urethane 29 and the resin film 27. The strength can be further ensured, and as a result, the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time, and the reliability can be increased.

  The adhesive strength between the glass plate 25 and the urethane foam 29 was subjected to a life acceleration test, and as a result, the adhesive strength was 1.0 g / cm 2 or more, preferably 2.6 g / cm 2 or more. Even if the adhesive strength is deteriorated due to aging such as heat shrinkage, the adhesive strength between the resin film 27 and the urethane foam 29 can be reliably ensured, and as a result, the adhesive strength of the glass plate 25 is maintained and guaranteed over a long period of time. And was able to be reliable. The method for measuring the adhesive force is described in “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. Based.

  Furthermore, in this embodiment, a portion of the edge frame 24 of the inner 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 jumping forward from the front surface of the glass plate 25. Since the plate support piece 24 b is positioned, the glass plate 25 is supported by the glass plate support piece 24 b of the edge frame 24 of the inner 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. This will greatly improve your sense of security. Further, since the glass plate support piece 24b of the edge frame 24 does not 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 flat feeling of the entire surface can be maintained. .

  Further, 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. 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.

  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 resin film 27 of the glass plate 25 and the edge frame 24 of the inner 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 managed and guaranteed.

  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 26 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 26 and the foamed urethane 29. Designability can be improved.

  As described above, the present invention eliminates a transparent front plate insertion portion such as a colored glass plate and enhances design properties, while preventing warping deformation of the transparent front plate and providing high design properties peculiar to the transparent front plate for a long time. It is possible to provide a refrigerator with a door that can be maintained well over a wide range, and can be widely applied to commercial refrigerators and wine coolers as well as general ones.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Outer box 3 Inner box 4 Urethane foam 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 Air blower fan 19 Compressor 20 Radiation pipe 21 Capillary tube 23 Inner 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, 29a, 29b Urethane foam 30 Plate (vacuum heat insulating material)
31 Handle part 31a Concave bottom 31b Concave back wall 31c Concave front wall 32 Easy adhesion layer 33 Double-sided tape

Claims (1)

It consists of a refrigerator main body and a door having heat insulating properties, and the door is transparent with a colored layer of an inner frame located on the inner side of a storage room and a glass plate arranged on an edge frame of the inner frame so as to cover the inner frame A front plate and urethane foam filled and foamed in a space between the transparent front plate and the inner frame and the edge frame, the transparent front plate is bonded and held by the urethane foam, and the outer peripheral portion is inserted into the transparent front plate In a configuration in which it is exposed as it is without being covered with a part or the like, a vacuum heat insulating material is embedded in a urethane foam between the inner frame and the transparent front plate via a positioning spacer, and the heat of the urethane foam A refrigerator that prevents deformation of the transparent front plate due to shrinkage.

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