JP5303415B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  In recent years, vacuum heat insulating materials having high heat insulating properties have been provided in order to save energy and save space in refrigerators.

  As a configuration in which the vacuum heat insulating material is provided in the heat insulating door with a multilayer structure together with the hard urethane foam, in Patent Document 1, a vacuum heat insulating material in which a peeling member is attached on the adhesive surface side with the hard urethane foam is attached to the inner box. A configuration in which a rigid urethane foam is filled and foamed in a space formed by an outer box and an inner box is disclosed.

  Patent Document 2 discloses a configuration in which a spacer is arranged on the upper surface of a vacuum heat insulating material and a foam heat insulating material is injected so that the vacuum heat insulating material does not directly contact the inner plate.

  In recent years, refrigerators and other home appliances often have a high-quality appearance.

  Patent Document 3 discloses a configuration in which glass is provided on the outer surface of the door to improve glossiness.

JP 2005-16776 A JP-A-8-100991 JP-A-5-126461

  In the configuration described in Patent Document 1, a vacuum heat insulating material is attached to the inner plate side in order to avoid distortion and dent on the door surface side. Here, the inner plate is made of a resin, is more easily deformed than the outer plate, and has a lot of irregularities. Therefore, it is difficult to fix the vacuum heat insulating material to the inner plate, and when a foam heat insulating material that is a rigid urethane foam is injected, a void is easily formed between the vacuum heat insulating material and the inner plate. Due to the formation of the cavity, there was a problem that a dent was generated on the inner plate side.

  Further, when a reinforcing iron plate or the like is attached to the inner plate side in order to prevent the inner plate from sticking and the warp of the entire door body, there is a problem that the manufacturing cost and the work fraction increase.

  In addition, there has been a problem that heat insulation efficiency is lowered by a so-called heat bridge phenomenon in which heat (cold air) inside the refrigerator is transmitted through the inner plate by the outer packaging material of the good heat conductor of the vacuum heat insulating material.

  Next, in the structure described in Patent Document 2, there is a problem in that the spacer reduces the fluidity of the rigid urethane foam and cannot secure a sufficient adhesion area.

  Further, there has been a problem that the double-sided tape is peeled off before the foaming of the rigid urethane foam is completed, and the vacuum heat insulating material is displaced from a predetermined position.

  Next, in the structure described in Patent Document 3, when the operation panel is disposed adjacent to the door outer plate, the operation panel storage portion is located between the divided outer plates or at the end portion of the outer plate. When the outer plate is glass and the operation panel storage portion is plastic, there is a problem that due to the difference in rigidity, the outer urethane plate easily deforms at the boundary between the outer plate and the operation panel storage portion due to the shrinkage force of the hard urethane foam.

  In view of the above problems, an object of the present invention is to provide a refrigerator with improved heat insulating performance by providing a heat insulating door of a refrigerator with a vacuum heat insulating material without reducing appearance.

In order to solve the above-described problems, the present invention provides a storage room provided in a refrigerator body, a heat insulating door that opens and closes the opening of the storage room, a glass outer plate that forms an outer wall of the heat insulating door, A space formed by a door frame provided at a peripheral edge of the plate, an inner plate provided on the door frame with a space from the outer plate, and the inner plate, the outer plate, and the door frame filled. In a refrigerator including a foam heat insulating material and a vacuum heat insulating material provided between the outer plate and the inner plate, an operation unit provided on the outer plate surface, the outer plate, and the inner plate A recess provided between the vacuum heat insulating material and the outer plate, and a support member for supporting a gap between the vacuum heat insulating material and the inner plate. wherein the vacuum heat insulating material is provided over the back surface of the recess, said vacuum heat insulator is disposed inclined with respect to the outer plate, The foamed heat insulating material is injected from the upper surface side of the vacuum heat insulating material, reaches the outer plate surface from the low inclined side of the vacuum heat insulating material, and is filled and foamed to flow in one direction on the outer plate surface. The foam heat insulating material is filled between the vacuum heat insulating material and the outer plate, and between the vacuum heat insulating material and the inner plate.

  The support member is fixed to the facing door frame or the adjacent door frame.

  Further, the foamed heat insulating material is filled and foamed between the back surface of the outer plate and the vacuum heat insulating material.

  Further, an iron plate-like member is provided on the back surface of the outer plate, and a heat insulating air layer is provided between the outer plate and the plate-like member.

  ADVANTAGE OF THE INVENTION According to this invention, a vacuum heat insulating material can be provided in the heat insulation door of a refrigerator, without reducing external appearance property, and the refrigerator which heat insulation performance improved can be obtained.

The external view of the refrigerator in Embodiment 1 of this invention. Sectional drawing of the heat insulation door of the refrigerator in Embodiment 1 of this invention. The perspective view of the supporting member in the embodiment. The upper periphery enlarged view of the support member attaching part in the embodiment. The lower periphery enlarged view of the support member attaching part in the embodiment. The upper expansion perspective view of the support member attachment structure in the embodiment. The lower part expansion perspective view of the support member attachment structure in the embodiment. The perspective view of the heat insulation door of the refrigerator in the embodiment. Sectional drawing of a foaming jig and a heat insulation door which shows the process of inject | pouring the hard urethane foam at the time of foaming the heat insulation door of the refrigerator in the embodiment. Sectional drawing of the heat insulation door of the refrigerator in Embodiment 2 of this invention. Sectional drawing of the heat insulation door of the refrigerator in Embodiment 2 of this invention. Sectional drawing of the heat insulation door of the refrigerator in Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the heat insulating door of the refrigerator in the first embodiment of the present invention. FIG. 3 is a perspective view of a support member attached in the heat insulating door of the refrigerator in the first embodiment. FIG. 4 is an enlarged view of the support member mounting portion of FIG. FIG. 5 is an enlarged perspective view of a support member mounting structure mounted in a heat insulating door of the refrigerator in the first embodiment. FIG. 6 is a perspective view of the heat insulating door of the refrigerator according to the first embodiment, and is a diagram before filling the hard urethane foam that is a heat insulating material, and FIG. 7 foams the heat insulating door of the refrigerator according to the first embodiment. It is sectional drawing of the foaming jig | tool and the heat insulation door which show the process of inject | pouring the hard urethane foam at the time.

  In FIG. 1, 101 is a refrigerator main body. The refrigerator main body 101 has a refrigerator compartment 102, a lower freezer compartment 105, a vegetable compartment 106, and the like in order from the top. An upper freezer compartment 104 is provided between the refrigerator compartment 102 and the lower freezer compartment 105, and an ice making room 103 is provided next to the upper freezer compartment 104.

  In addition, a heat insulating door for opening and closing the front opening is provided at the front opening of each storage chamber. In other words, a left refrigerator door 102a and a right refrigerator door 102b are provided at the front opening of the refrigerator compartment 102, and the upper openings of the upper freezer compartment 104, the lower freezer compartment 105, the ice making compartment 103, and the vegetable compartment 106 are provided at the front openings. An upper freezer compartment door 104a, a lower freezer compartment door 105a, an ice making room door 103a, and a vegetable compartment door 106a are provided.

  The left refrigerator door 102a and the right refrigerator door 102b are rotatably supported by upper hinges 103 (left hinge 103a and right hinge 103b) provided on the upper part of the refrigerator main body 101, respectively. That is, it constitutes a French door configured in a left-right opening manner.

  Further, the lower freezer compartment door 105a, the upper freezer compartment door 104a, the ice making room door 103a and the vegetable compartment door 105a are each a drawer-type door, and can be pulled out together with the containers of the respective storage rooms.

  An operation unit 14 is provided in the left refrigerator compartment door 102a. The operation part 14 sets the storage room temperature and various functions of a refrigerator by a user's operation.

  Next, in FIG. 2, 1 is the heat insulation door which covers the front opening part of a refrigerator, the outer plate 2, the synthetic resin door frame 3, the synthetic resin inner plate 4, the vacuum heat insulating material 5, the support member 6, It is comprised from the foaming heat insulating material 7 and the curvature prevention metal fitting 8 made from a hard urethane foam.

  The outer plate 2 is made of glass, and is made of tempered glass having a thickness of 2.0 to 3.2 mm, not a normal non-tempered float glass. As a result, not only does the rigidity increase and it is difficult to break, but even if it breaks, it does not break sharply like a blade like a plate glass that has not been tempered, but breaks into pieces. Therefore, it is excellent in terms of safety when cracked. Further, the back surface of the glass outer plate 2 subjected to the tempering treatment is decorated by multilayer silk screen printing or other means. As a result, the outer plate 2 can be made a high-value-added outer plate, not only by color and pattern, but also by a glossiness, depth, and flatness.

  The inner plate 4 is formed by vacuum-forming a sheet material made of ABS resin, and integrally formed with a gasket fixing groove 4a for fixing a door gasket (not shown) on the outer periphery.

  Moreover, the vacuum heat insulating material 5 is a rectangular plate-shaped thing consisting of the core material which consists of glass wool, and the outer packaging material which has the gas barrier property which accommodates the core material, and exhibits high heat insulation performance by making an inside into a vacuum state. Is.

  The outer packaging material is a good heat conductor formed by laminating a metal-deposited plastic film produced by vapor-depositing a metal such as aluminum or other plastic film materials in order to provide gas barrier properties. Therefore, when the heat insulating door body is configured so as to be in contact with the outer plate 2 or the inner plate 4, the heat of the outside air or the heat inside the refrigerator (cold air) passes through the outer plate 2 or the inner plate 4 and is a metal-deposited plastic film. The heat insulation effect is greatly reduced by heat bridge phenomenon.

  Therefore, it is necessary to store the vacuum heat insulating material 5 without making contact with the outer plate 2 or the inner plate 4, and the vacuum heat insulating material 5 is arranged in the middle between the outer plate 2 and the inner plate 4 and vacuumed in the foam heat insulating material 7. A support member 6 (support holder) that supports the heat insulating material 5 is used for embedding.

  The support member 6 is made of a plastic such as ABS, and as shown in FIG. 3, the vacuum heat insulating material 5 is sandwiched in the front and back by a plate-like first presser portion 6a formed integrally with the main body of the support member 6. And fixed.

  The first presser portion 6a has a substantially U-shaped attachment portion 6b with the main body, and when the vacuum heat insulating material 5 is sandwiched, the first presser portion 6a is opened as shown by an arrow in FIG. It is hard to break. On the other hand, the shape of the other end of the first presser portion 6a is also formed in a substantially U shape, and the locking piece 6c and the locking piece 6c are prevented from coming off after the vacuum heat insulating material 5 is sandwiched at the tip. 6d is attached. Further, the second presser portion 6 e that sandwiches the vacuum heat insulating material 5 on the back surface constitutes the projected left and right surfaces of the support member 6 and needs to hold the vacuum heat insulating material 5. For this reason, the cross section is formed in an H shape to ensure the strength.

  The first presser part 6a and the second presser part 6e have a die-cut structure, and when viewed from the projection plane, the left and right sides of the first presser part 6a are spaces 6f. As a result, the mold structure can be simplified without using a slide core, and the foamed heat insulating material 7 can be filled to every corner without impeding the flow of the rigid urethane foam. It should be noted that the punch holes 6g are also provided for the same role and are preferably provided at several places as appropriate.

  Next, the attachment method at the time of attaching the supporting member 6 to the heat insulation door 1 of a refrigerator is demonstrated. In this embodiment, the upper end 6h and the lower end 6i of the support member are fixed to the inner surface of the door frame 3, but in FIG. The rib 3a and the rib 3b are disposed on the surface. This is because the hard urethane foam on the inner side of the heat insulating door 1 contracts due to the temperature difference between the outside and the inside of the box, and the heat insulating door 1 warps in a curved shape. That is, the U-shaped or L-shaped warpage preventing metal fitting 8 is installed to prevent a gap from being generated between the door gasket (not shown) and the box body and causing cold air leakage. In the present embodiment, the upper end 6 h and the lower end 6 i of the support member 6 are installed and fixed in the space inside the warp preventing metal fitting 8.

  Even if it is not necessary to use the warp prevention metal fitting 8, it is installed and fixed in the space between the rib 3a and the rib 3b on the inner surface of the door frame 3. In this case, the upper end 6h of the support member 6 is used. In addition, since the back end 6i and the rib 3a and the rib 3b are loose, the thicknesses of the upper end 6h and the lower end 6i are corrected. Moreover, what is necessary is just to adjust when making the supporting member 6 about the position of the front-back direction of the vacuum heat insulating material 5, ie, the distance of the outer plate 2 and the inner plate 4. FIG.

  Next, the positioning in the left-right direction will be described using the enlarged perspective view of the support member mounting structure shown in FIGS. 5A and 5B. FIG. 5A is a view of the heat insulating door 1 as seen from the back side, and shows a state before the support member 6 is assembled into the upper door frame 3. FIG. 5B is a view showing a state before being incorporated into the lower door frame 3.

  In FIG. 5A, reference numeral 3c denotes a warp preventing metal fitting (see FIG. 5A) that is provided in the rib 3a on the inner surface of the door frame 3 with an appropriate interval (for example, 100 to 150 mm) and is installed and fixed in the space between the rib 3a and the rib 3b. Is a door frame locking portion. The height of the door frame locking portion 3c is usually slightly larger (for example, 1.5 to 2 mm) than the thickness (about 1 mm) of the warp preventing metal fitting, but in this embodiment, a claw for fixing the support member 6 Therefore, the height of the nail is made higher by the thickness of the support member 6 (about 2 mm).

  When it is not necessary to use the warp preventing metal fitting 8, the height of the nail may be about 2 mm from the beginning. The mounting position of the support member 6 in the left-right direction can be fixed by inserting and fixing the square hole 6j provided in the opposite part of the support member 6 to the door frame locking portion 3c thus provided. . When the height of the door frame latching portion 3c cannot be increased due to the structure of the mold, the door frame latching portion 3c is pressed from both sides on the back side of the lower end 6i of the support member 6 as shown in FIG. 5B. There is also a method of fixing the mounting position in the left-right direction by providing such a convex portion 6k.

  In this embodiment, the door frame 3 is configured to be vertically arranged. However, in the case of a heat-insulating door in which the plastic door frame 3 is configured to the left and right, the left and right door frames may be used similarly. Moreover, in the case of the heat insulation door which comprises a door frame up and down, right and left, you may fix the supporting member 6 to the inner surface or edge part of an adjacent door frame.

  Further, the number of the support members 6 to be used depends on the size of the vacuum heat insulating material, the injection position of the foam heat insulating material 7, or the mass and rigidity of the vacuum heat insulating material 5, but two are appropriate as shown in FIG.

  Thus, although vacuum heat insulating material 5 is embed | buried in the foam heat insulating material 7, injection | pouring is explained about the hard urethane foam which is a heat insulating material.

  In FIG. 7, 9 is a foaming jig for a heat insulating door, 9a is a jig body, and 9b is an openable lid jig. After the heat insulation door 1 is installed in the jig body 9a, the urethane foam stock solution is injected from the rigid urethane foam injection header 10, and the lid jig 9b on which the inner plate 4 is installed is closed. At this time, the size of the vacuum heat insulating material 5 is preferably as large as possible with respect to the projected area of the heat insulating door 1 in terms of heat insulating performance. However, when the vacuum heat insulating material 5 is enlarged, there is no space for injecting the hard urethane foam stock solution onto the outer plate 2 surface. Therefore, in this embodiment, as shown in FIG. 7, the vacuum heat insulating material 5 is disposed so as to be inclined with respect to the surface of the outer plate 2, and a hard urethane foam stock solution is injected into the upper surface of the vacuum heat insulating material 5. The stock solution injected in this way was allowed to reach the outer plate 2 only from the lower side of the inclination of the vacuum heat insulating material 5 (lower end side of the inclination). As a result, in the configuration shown in FIG. 7, the stock solution of the hard urethane foam that has reached the outer plate 2 surface flows from the left side to the right side and is foamed after reaching the back surface of the right door frame. In other words, since the vacuum heat insulating material 5 is not installed horizontally, the stock solution of the hard urethane foam injected onto the vacuum heat insulating material 5 does not flow down from both the left and right sides of the vacuum heat insulating material 5 to the outer plate 2, but the outer plate 2. Since the stock solution of the rigid urethane foam does not collide from the left and right on the surface, the generation of voids caused by turbulent flow can be prevented.

  Here, the back surface of the glass outer plate 2 is configured to be in close contact with the hard urethane foam over almost the entire surface excluding the portion to be inserted into the door frame 3 (about 5 mm to 7 mm). The glass outer plate 2 is made of tempered glass that has been tempered instead of a normal glass plate that has not been tempered (float glass).

  As described above, the heat insulating door 1 according to the first embodiment has a configuration in which the vacuum heat insulating material 5 is disposed approximately in the middle between the outer plate 2 and the inner plate 4 and embedded in the foam heat insulating material 7 made of rigid urethane foam. Therefore, the vacuum heat insulating material 5 does not thermally contact the outer plate 2 or the inner plate 4 directly. As a result, the heat bridge phenomenon caused by heat conduction from the outside air and the inside heat (cold air) to the metal-deposited plastic film of the vacuum heat insulating material 5 through the outer plate 2 and the inner plate 4 can be avoided, and the heat insulation efficiency can be avoided. Can provide good thermal insulation door.

  Further, since the vacuum heat insulating material 5 does not directly contact the outer plate 2 or the inner plate 4, a void or a rigid urethane foam that can be a critical portion between the vacuum heat insulating material 5 and the outer plate 2 or the inner plate 4. Due to the difference in shrinkage rate of the foamed heat insulating material 7 made of the material, it is possible to supply an inexpensive and excellent heat-insulating door that does not have any stickiness or distortion generated on the surface of the outer plate 2 or the inner plate 4.

  Furthermore, since the vacuum heat insulating material 5 is configured to be supported and fixed in the foamed heat insulating material 7 made of rigid urethane foam by the support member 6, the workability is good and there is no variation in the mounting position, so that it can be securely embedded and fixed in the heat insulating material.

  The support member 6 that supports the vacuum heat insulating material 5 is configured to be fixed between the upper and lower, left and right door frames 3 or the inner side surface or edge of the adjacent door frames 3. Thereby, the attachment groove | channel of the door gasket (not shown) provided in the outer peripheral part of the inner board 4 and the support member 6 do not interfere. In other words, there is no fear that hard urethane foam unfilled parts will occur on the heat insulating material side of the gasket mounting groove on the door inner plate, and the gasket mounting groove can be sufficiently adhered with the hard urethane foam, making it difficult for the gasket to come off, Furthermore, the refrigerator provided with the reliable heat insulation door which acquired sufficient intensity | strength structurally can be obtained.

  Moreover, the vacuum heat insulating material 5 is inclined with respect to the surface of the outer plate 2 using the support member 6, and a hard urethane foam stock solution is injected into the upper surface of the vacuum heat insulating material 5. Since the undiluted solution injected in this way can reach the outer plate 2 only from the lower side of the inclination of the vacuum heat insulating material 5 (lower end side of the inclination), the undiluted solution reaching the surface of the outer plate 2 is the heat insulating door. 1 flows from one end side (from the left side to the right side in FIG. 7), and after reaching the back surface of the door frame on the opposite side, it is foamed. For this reason, the flow of the stock solution of rigid urethane foam is unidirectional, and the stock solution of rigid urethane foam does not collide from the left and right on the outer plate 2 surface, so that the formation of voids can be prevented. A heat-insulating door with no distortion and excellent appearance can be supplied.

  Moreover, the back surface of the glass outer plate 2 is configured so that the hard urethane foam is filled almost over the entire surface excluding the portion to be inserted into the door frame 3 (about 5 mm to 7 mm). Thereby, even if it is the heat insulation door 1 which uses the vacuum heat insulating material 5, the back surface of the glass outer plate 2 will be closely_contact | adhered with the foam heat insulating material 7 made from a hard urethane foam. Thus, even when the glass outer plate 2 is broken, the glass outer plate 2 is in close contact with the hard urethane foam heat insulating material, so that it can be prevented from being scattered or dropped when broken. For this reason, it is not necessary to stick the film for scattering prevention on the back surface of the glass plate, and a safe and inexpensive heat insulating door can be supplied.

  The glass outer plate 2 uses tempered glass. This makes it more rigid and harder to break than normal non-strengthened flat glass (float glass), and even if it breaks, tempered glass is sharp like a blade, like unstrengthened flat glass. There is a feature that breaks into pieces without breaking. For this reason, it is excellent in terms of safety when cracked, and becomes a safe insulated door.

  Next, a second embodiment will be described. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  8A and 8B are cross-sectional views of the heat insulating door of the refrigerator according to Embodiment 2 of the present invention, and as a means for improving operability, a recess for storing the internal temperature operation panel substrate is provided on the surface of the heat insulating door. It is the figure arrange | positioned in the place adjacent to the glass plate.

  In FIG. 8A, 11 is a recessed part for accommodating the operation panel substrate. The recess 11 is formed of ABS or other plastic, 12 is an operation panel substrate, and 14 is an operation unit. Since the position (particularly the height) of the operation unit 14 is related to the operability of the panel, it must be arranged at a height that is easy to use. For this reason, in most modern refrigerators, the top room is often a refrigerated room, and it is approximately the center of the refrigerated room door in terms of convenience, or about one-third the height of the refrigerated room door. There is. In other words, the operation portion 14 is not necessarily located at the upper and lower ends or the left and right ends of the heat insulating door 1, and the concave portion 11 is sandwiched between the glass outer plates 2 in FIG. It is placed at a height that is easy to use.

  In addition, since the recessed part 11 accommodates the operation panel board | substrate 12, the depth is generally about 20 mm to 30 mm. Further, the flange 11a in contact with the outer surface is formed in a structure in which the glass outer plate 2 can be sandwiched, and after temporarily fixing the outer plate 2, the vacuum heat insulating material 5 is located at the position of the glass outer plate 2 The support member 6 adjusted so as to be approximately in the middle position of the inner plate 4 is installed, and a foamed heat insulating material 7 made of hard urethane foam is injected to form the outer plate 2 and the recess 11 for accommodating the operation panel substrate. Fix with foam. At this time, the vacuum heat insulating material 5 should have a size that covers almost the entire back surface of the recess 11 for housing the operation panel substrate, or a size that is close to the projected area of the heat insulating door 1.

  If it is the heat insulation door 1 comprised in this way, the foam heat insulating material 7 made from a hard urethane foam will be fixed by foaming around the vacuum heat insulating material 5 used as the nucleus, and also the outer plate | board 2, door frame 3 which comprises the circumference | surroundings Since the inner plate 4 is fixed by foaming with the foam heat insulating material 7, it is possible to provide a heat insulating door that is not easily affected by the shrinkage force of the hard urethane foam due to external heat or cold in the storage.

  8B is an example in which the position of the recess 11 for storing the operation panel is positioned at the upper and lower ends or the left and right ends of the heat insulating door 1, but it is an example that is easy to use from the height of the entire refrigerator. In this embodiment, the difference from FIG. 8A is the position of the recess 11, and other forms and configurations are the same, so detailed description will be omitted.

  As described above, the heat insulating door 1 in the present embodiment 2 is embedded in the foam heat insulating material 7 made of rigid urethane foam, with the arrangement of the vacuum heat insulating material 5 approximately between the glass outer plate 2 and the inner plate 4, And the vacuum heat insulating material 5 is the structure embed | buried so that the substantially back surface of the recessed part 11 for operation panel accommodation for accommodating the operation panel board | substrate 12 might be covered. Therefore, the vacuum heat insulating material 5 is also arranged on the projected rear surface of the boundary (A) point and (B) point between the glass outer plate 2 and the recess 11 for storing the operation panel, and the glass by the adhesive force of the foam heat insulating material 7. The made outer plate 1, the recess 11 for accommodating the operation panel, and the vacuum heat insulating material 5 are bonded in a sandwich form with a hard urethane foam with a certain distance. For this reason, the rigidity of the heat insulating door body is increased, and due to the difference in material rigidity between the glass outer plate 2 and the recess 11 for storing the plastic operation panel, the heat insulating door 1 is affected by the shrinkage force of the hard urethane foam. A rigid heat-insulating door that does not bend and deform from the boundary between the glass outer plate 2 and the operation panel storage recess 11 can be supplied.

  Next, Embodiment 3 will be described. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 9 is a cross-sectional view of the heat insulating door of the refrigerator in the third embodiment. In FIG. 9, the outer plate constituting the surface of the heat insulating door 1 has a double structure, and the surface is a glass that is the first outer plate. The plate-like outer plate 2 and the plate member 15 made of iron plate (about 0.3 mm zinc iron plate) are used on the back surface. A heat insulating air layer 16 that is a slight space is provided between the glass outer plate 2 and the plate-like member 15.

  By adopting such a configuration, even when the vacuum heat insulating material 5 originally embedded in the heat insulating material partially comes into contact with the plate-like member 15 on the back side due to variations in the mounting position on the assembly, Since the member 15 is not the surface (design surface) of the heat-insulating door, there is no problem even if the plate-like member is caused to become sticky or distorted due to the difference in the shrinkage rate of the hard urethane foam.

  Similarly, when the vacuum heat insulating material 5 partially comes into contact with the plate-like member 15, an air heat insulating layer is provided between the plate-like member 15 and the outer plate 2 on the surface side. Is not in direct contact with the outside air. For this reason, the outflow of the heat by a heat bridge phenomenon can be minimized, and the heat insulation door with sufficient heat insulation efficiency can be supplied.

  In addition, since it is the double structure mentioned above, it is the plate-shaped member 15, the door frame 3, the inner plate 4, the foam heat insulating material 7, and the vacuum heat insulating material 5 that comprise a heat insulation door. These are in close contact with the foam heat insulating material 7 to ensure the strength of the heat insulating door. In other words, the outer skin 2 on the front side is not necessarily required as a strength member of the heat insulating door. For this reason, the outer skin 2 on the surface side is not necessarily required when injecting rigid urethane foam and foaming the heat-insulating door body. If the plate can be removed, even if the glass plate is broken, only the glass plate can be replaced, so that a heat insulating door with good serviceability can be supplied.

  As described above, in the heat insulating door 1 according to the third embodiment, the vacuum heat insulating material 5 originally embedded in the heat insulating material is in partial contact with the plate-like member 15 on the back surface side due to variations in the mounting position on the assembly. However, since the plate-like member 15 is not the surface (design surface) of the heat insulating door 1, even if the plate-like member 15 is caused to become sticky or distorted due to the difference in shrinkage rate of the foamed heat insulating material 7 made of hard urethane foam. It doesn't matter.

  Similarly, even when the vacuum heat insulating material 5 is partially in contact with the plate member 15 on the back surface side, the heat insulating air layer 16 is interposed between the plate member 15 and the outer plate 2 on the front surface side. Therefore, the second outer plate 15 is not in direct contact with the outside air. For this reason, the outflow of the heat by a heat bridge phenomenon can be minimized, and the heat insulation door with sufficient heat insulation efficiency can be supplied.

  As described above, according to the embodiment of the present invention, since the vacuum heat insulating material does not come into direct thermal contact with the outer plate or the inner plate, the heat of the outside air or the heat inside (cold air) It is possible to avoid a heat bridge phenomenon caused by heat conduction to the metal vapor-deposited plastic film of the vacuum heat insulating material through the inner plate, and to supply a heat insulating door with good heat insulating efficiency.

  In addition, since the vacuum heat insulating material does not directly contact the outer plate or the inner plate, there is a void that can be formed in the critical part between the vacuum heat insulating material and the outer plate or the inner plate, or the unevenness that occurs due to the difference in the shrinkage rate of the rigid urethane foam. It can supply heat insulation doors without distortion.

  In addition, a vacuum heat insulating material is also arranged on the projected back of the boundary between the glass plate and the operation panel, and the glass plate, the operation panel and the vacuum heat insulating material are sandwiched by the hard urethane foam with a certain distance due to the adhesive force of the hard urethane foam. It can be glued in a shape. For this reason, since the rigidity of the heat insulation door can be increased, due to the difference in material rigidity between the glass outer plate and the plastic operation panel, the heat insulation door can be separated between the glass plate and the operation panel due to the shrinkage force of the hard urethane foam. It is possible to supply a highly rigid insulated door that does not bend and deform from the boundary.

DESCRIPTION OF SYMBOLS 1 Heat insulation door 2 Outer plate 3 Door frame 3a, 3b Rib 3c Door frame latching part 4 Inner plate 4a Gasket fixing groove 5 Vacuum heat insulating material 6 Support member 6a First presser part 6b Mounting part 6c Locking piece 6d Locking part 6e 2nd presser part 6f Space 6g Hole 6h Upper end 6i Lower end 6j Square hole 6k Convex part 7 Foam heat insulating material 8 Warpage prevention metal fitting 9 Foam jig 9a Jig body 9b Cover jig 10 Header 11, 12 Concave part 11a Flange 13 Operation panel substrate 14 Operation unit 15 Plate member 16 Insulated air layer

Claims (4)

A storage room provided in the refrigerator body;
A heat insulating door for opening and closing the opening of the storage room;
A glass outer plate forming the outer wall of the heat insulating door;
A door frame provided at the periphery of the outer plate;
An inner plate provided on the door frame across a space from the outer plate;
A foam heat insulating material filled in a space formed by the inner plate, the outer plate and the door frame;
In a refrigerator provided with a vacuum heat insulating material provided between the outer plate and the inner plate,
An operation unit provided on the outer plate surface;
A recess that is provided between the outer plate and the inner plate and houses a substrate of the operation unit;
A support member that supports a gap between the vacuum heat insulating material and the outer plate, and a space between the vacuum heat insulating material and the inner plate ;
The vacuum heat insulating material is provided over the back surface of the concave portion, the vacuum heat insulating material is disposed to be inclined with respect to the outer plate, and the foam heat insulating material is injected from the upper surface side of the vacuum heat insulating material, Filled and foamed so as to reach the outer plate surface from the low slope side of the heat insulating material and flow in one direction on the outer plate surface , and between the vacuum heat insulating material and the outer plate, and the vacuum heat insulating material And the said foaming heat insulating material was filled between the said inner plates, The refrigerator characterized by the above-mentioned. The refrigerator according to claim 1, wherein the support member is fixed to the facing door frame or the adjacent door frame . The foam insulation between the vacuum insulation material and the back surface of the skin is characterized in that by filling foamed refrigerator according to claim 1. The refrigerator according to claim 1 , wherein an iron plate-like member is provided on a back surface of the outer plate, and a heat insulating air layer is provided between the outer plate and the plate-like member .

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