Embedded refrigerator door

Abstract

The embedded refrigerator door comprises a door frame, a door shell, a cabinet board and a heat insulation body, the periphery of the door shell is fixedly arranged on the inner wall of the door frame so that a filling space and a receding space can be formed on the two sides of the door shell, the cabinet board is installed on the edge of the door shell and abuts against the door frame so as to cover the receding space, and the middle of the cabinet board and the door shell are arranged in a spaced mode; the heat insulation body comprises a door liner and a heat insulation body, the door liner covers the filling space, the filling space is filled with the heat insulation body, and the heat insulation body is made of foaming agents through a foaming process, is used for filling the filling space to prevent heat of the refrigerator from leaking out and is also used for fixing the door liner and the door frame. In the foaming forming process of the heat insulation body, the receding space can accommodate the middle of the door shell to deform towards the cabinet board, and the situation that gaps are generated between the cabinet board and the door frame due to extrusion of the door shell is avoided; the cabinet board is installed on the edge of the door shell, so that the influence of deformation of the door shell on the relative position between the cabinet board and the door frame is reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of built-in refrigerator doors, in particular to a built-in refrigerator door. Background Art

[0002] The existing fully embedded refrigerator door body is generally composed of a door shell, an upper cover, a lower cover, a door liner, and a guide rail reinforcement iron. The cabinet panel is installed by connecting the upper and lower covers of the door body with external connectors. The external connector is generally a sheet metal part with multiple waist-shaped holes. The sheet metal part needs to be attached to the door shell to ensure the stability of the cabinet panel installation. In addition, the refrigerator door body usually uses a foaming process to fill the internal space. The foaming process refers to injecting a foaming agent into the sealed space formed by the door shell, upper cover, lower cover, door liner, sheet metal parts and other connectors, and expanding and filling the entire space through chemical reaction or physical pressurization and heating. Due to the particularity of this process, the door shell is usually deformed during the reaction process, and the sheet metal parts and cabinet boards connected to the door shell are also prone to deformation. The final result is a visible gap between the cabinet board and the door shell, which affects the quality of the product. Utility Model Content

[0003] Since the existing fully embedded refrigerator door is difficult to overcome the problem of gaps on the side of the door body caused by the foaming process and assembly method, it is necessary to provide an embedded refrigerator door.

[0004] A built-in refrigerator door, comprising:

[0005] Door frame;

[0006] A door shell, the periphery of which is fixed to the inner wall of the door frame to form a filling space and a clearance space on both sides of the door shell;

[0007] A cabinet board, the cabinet board is mounted on the edge of the door shell and abuts against the door frame to cover the clearance space, and the middle portion of the cabinet board is spaced apart from the door shell; and

[0008] The heat-insulating body comprises a door liner covering the filling space and a heat-insulating body filling the filling space.

[0009] With such an arrangement, during the foaming process of the insulation body, the clearance space can accommodate the deformation of the middle part of the door shell toward the cabinet board, thereby avoiding the generation of a gap between the cabinet board and the door frame due to the squeezing of the door shell. In addition, since the edge deformation of the door shell is smaller, installing the cabinet board on the edge of the door shell also minimizes the influence of the deformation of the door shell on the relative position between the cabinet board and the door frame.

[0010] In one embodiment, a middle portion of the door shell has a sinking groove recessed toward the filling space.

[0011] Such an arrangement further increases the distance between the middle of the door shell and the cabinet board, which is conducive to accommodating more deformation of the middle of the door shell and ensuring the foaming quality and molding quality of the built-in refrigerator door.

[0012] In one of the embodiments, the door shell further has a plurality of first reinforcing ribs located in the sinking groove.

[0013] In this way, the arrangement of the plurality of first reinforcing ribs also increases the structural strength of the middle portion of the door shell, which is beneficial to reducing the deformation of the middle portion of the door shell.

[0014] In one embodiment, a plurality of snap-in grooves are provided on the edge of the door shell, and the cabinet panel includes a panel body and a plurality of hooks extending from the panel body toward the door shell, and one end of the hook away from the panel body is snap-connected to the snap-in groove.

[0015] Such a configuration makes the snap-on connection convenient for assembly and helps to improve the assembly efficiency of the built-in refrigerator door. In addition, the snap-on connection between the hook and the snap-on groove is a point-connected assembly method, that is, the contact area between the cabinet panel and the door shell is small, and the cabinet panel is not easily affected by the deformation of the door shell.

[0016] In one of the embodiments, the built-in refrigerator door further includes a plurality of rivets riveted to the door shell and the door frame, and each of the clamping grooves is correspondingly arranged on one side of the door shell close to each of the rivets.

[0017] With such arrangement, the deformation of the door shell decreases as it approaches the rivet, and the arrangement of each snap-fitting groove corresponding to the rivet further reduces the deformation of the door shell at the snap-fitting groove, thereby reducing the impact on the installation of the cabinet panel.

[0018] In one embodiment, the door frame has a plurality of mounting surfaces extending inwardly from the inner wall of the door frame, and the door shell is fixed on the mounting surfaces.

[0019] With this arrangement, the connection position between the door shell and the door frame is located on the installation surface inside the door frame. The outer wall of the door frame is not easily deformed during assembly and foaming, and the gap between the door frame and the cabinet board is further reduced, ensuring the integrity of the appearance of the built-in refrigerator door.

[0020] In one embodiment, the door frame includes two side columns arranged at intervals and an upper cover and a lower cover arranged at intervals, and the two side columns and the upper cover and the lower cover are fixedly connected end to end in sequence;

[0021] The side column includes a connecting plate and a first mounting plate and a second mounting plate spaced apart from the connecting plate, the mounting surface is located on a side of the first mounting plate facing away from the second mounting plate, the door liner abuts against a side of the second mounting plate facing away from the first mounting plate, and the cabinet panel abuts against an end surface of the connecting plate.

[0022] With such arrangement, the door frame is assembled separately through the side column, the upper cover and the lower cover, which reduces the mold cost. In addition, the first mounting plate and the second mounting plate of the side column are not only used to provide mounting positions for the door shell and the door liner, but also can increase the structural strength of the side column, reduce the deformation of the connecting plate, and prevent the formation of a gap between the end faces of the cabinet plate and the connecting plate, thereby maintaining the integrity of the appearance of the built-in refrigerator door.

[0023] In one embodiment, the side column further includes a second reinforcing rib located between the first mounting plate and the second mounting plate and fixed to the connecting plate.

[0024] With such arrangement, the second reinforcing rib can not only further increase the structural strength of the side column, but also can be embedded in the heat insulating body formed after the foaming agent is molded, which is helpful to prevent the heat insulating body from escaping from the filling space.

[0025] In one of the embodiments, in order to avoid the problem that the filling space of the insulation body in the built-in refrigerator door is occupied by the give-up space, resulting in a decrease in the insulation effect, the insulation body also includes a first vacuum insulation panel abutting against the side of the door shell facing the filling space.

[0026] In this way, the first vacuum insulation panel is arranged so that the insulation body can still maintain a good insulation effect at a relatively thin thickness, which is beneficial to maintaining the existing thickness of the built-in refrigerator door and avoiding position interference with the installation of other components of the refrigerator.

[0027] In one embodiment, the insulation body also includes a second vacuum insulation panel located in the filling space and fixed to a side of the door liner close to the upper cover, and the projections of the second vacuum insulation panel and the first vacuum insulation panel on the door shell overlap respectively.

[0028] In this way, since the door handle of the built-in refrigerator door is usually arranged near the upper cover, the second vacuum insulation panel can increase the insulation effect of the side of the insulation body close to the upper cover, further slowing down the transfer of cold air in the refrigerator and avoiding condensation problems caused by the temperature at the door handle being too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a built-in refrigerator door in an embodiment of the utility model;

[0030] Figure 2 for Figure 1 The cross-sectional view of the built-in refrigerator door taken along the AA direction is shown;

[0031] Figure 3 for Figure 2 A partial enlarged view of the X in the middle;

[0032] Figure 4 for Figure 2 Schematic diagram of the structure of the middle door shell;

[0033] Figure 5 for Figure 2 Schematic diagram of the structure of the middle side column;

[0034] Figure 6 for Figure 1 The cross-sectional view of the built-in refrigerator door taken along the BB direction is shown;

[0035] Figure 7 for Figure 6 A partial enlarged view of the Y point in the middle.

[0036] Reference numerals:

[0037] 10. Door frame; 101. Mounting surface; 102. Clearance groove; 11. Side column; 111. Connecting plate; 112. First mounting plate; 113. Second mounting plate; 114. Second reinforcing rib; 12. Upper cover; 13. Lower cover; 20. Door shell; 21. Sinking groove; 22. First reinforcing rib; 23. Snap-in groove; 24. Folding edge; 25. Rivet hole; 30. Cabinet board; 31. Board body; 32. Hanging buckle; 40. Insulation body; 41. Door liner; 42. First vacuum insulation board; 43. Second vacuum insulation board; 50. Rivet; 1. Clearance space; 2. Filling space. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] The existing fully embedded refrigerator door body is generally composed of a door shell, an upper cover, a lower cover, a door liner, and a guide rail reinforcement iron. The cabinet panel is installed by connecting the upper and lower covers of the door body with external connectors. The external connector is generally a sheet metal part with multiple waist-shaped holes. The sheet metal part needs to be attached to the door shell to ensure the stability of the cabinet panel installation. In addition, the refrigerator door body usually uses a foaming process to fill the internal space. The foaming process refers to injecting a foaming agent into the sealed space formed by the door shell, upper cover, lower cover, door liner, sheet metal parts and other connectors, and expanding and filling the entire space through chemical reaction or physical pressurization and heating. Due to the particularity of this process, the door shell is usually deformed during the reaction process, and the sheet metal parts and cabinet boards connected to the door shell are also prone to deformation. The final result is a visible gap between the cabinet board and the door shell, which affects the quality of the product.

[0045] Based on this, it is necessary to provide a built-in refrigerator door that can overcome the deformation effect of the foaming process.

[0046] See also Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a built-in refrigerator door in an embodiment of the utility model. Figure 2 for Figure 1 The cross-sectional view of the built-in refrigerator door in the AA direction is shown. Figure 3 for Figure 2 A partial enlarged view of the X in the middle. The embedded refrigerator door provided by the present application comprises a door frame 10, a door shell 20, a cabinet board 30 and a heat-insulating body 40. The door shell 20 is fixedly arranged on the inner wall of the door frame 10 around the periphery to form a filling space 2 and a clearance space 1 on both sides of the door shell 20. The cabinet board 30 is installed on the edge of the door shell 20 and abuts against the door frame 10 to cover the clearance space 1. The middle part of the cabinet board 30 is spaced apart from the door shell 20. The heat-insulating body 40 comprises a door liner 41 and a heat-insulating body. The door liner 41 covers the filling space 2. The heat-insulating body fills the filling space 2. The heat-insulating body is made of a foaming agent through a foaming process, and is used to fill the filling space 2 to prevent the heat of the refrigerator from leaking out, and is also used to fix the door liner 41 to the door frame 10. During the foaming process of the insulation body 40, the clearance space 1 can accommodate the deformation of the middle part of the door shell 20 toward the cabinet panel 30, thereby avoiding the generation of a gap between the cabinet panel 30 and the door frame 10 due to the extrusion of the door shell 20. In addition, since the edge deformation of the door shell 20 is smaller, installing the cabinet panel 30 on the edge of the door shell 20 also minimizes the influence of the deformation of the door shell 20 on the relative position between the cabinet panel 30 and the door frame 10.

[0047] See also Figure 4 , Figure 4 for Figure 2Schematic diagram of the structure of the middle door shell 20. In one embodiment provided in the present application, the middle portion of the door shell 20 has a sinking groove 21 that is recessed toward the filling space 2. This can further increase the distance between the middle portion of the door shell 20 and the cabinet board 30, which is conducive to accommodating more deformation of the middle portion of the door shell 20, ensuring the foaming quality and the molding quality of the built-in refrigerator door. Furthermore, the door shell 20 also has a plurality of first reinforcing ribs 22 located in the sinking groove 21. The provision of the plurality of first reinforcing ribs 22 also increases the structural strength of the middle portion of the door shell 20, which is conducive to reducing the deformation of the middle portion of the door shell 20.

[0048] Please also read Figure 2 , Figure 3 and Figure 4 The edge of the door shell 20 is provided with a plurality of snap-in grooves 23, and the cabinet board 30 includes a board body 31 and a plurality of hooks 32 extending from the board body 31 toward the door shell 20, and one end of the hook 32 away from the board body 31 is snap-in connected to the snap-in groove 23. This snap-in method facilitates assembly and helps improve the assembly efficiency of the built-in refrigerator door. In addition, the snap-in cooperation between the hook 32 and the snap-in groove 23 is a point-connected assembly method, that is, the contact area between the cabinet board 30 and the door shell 20 is small, and the cabinet board 30 is not easily affected by the deformation of the door shell 20. Furthermore, the built-in refrigerator door also includes a plurality of rivets 50 riveted to the door shell 20 and the door frame 10, so that the door shell 20 has a plurality of rivet holes 25, and each snap-in groove 23 is correspondingly arranged on one side of the door shell 20 close to each rivet hole 25. Since the deformation of the door shell 20 decreases as it approaches the rivet hole 25, arranging each snap-in groove 23 corresponding to the rivet hole 25 further reduces the deformation of the door shell 20 at the snap-in groove 23, thereby reducing the impact on the installation of the cabinet panel 30.

[0049] See also Figure 2 , Figure 3 and Figure 5 , Figure 5 for Figure 2Structural schematic diagram of the middle side column 11. In one embodiment provided in the present application, the door frame 10 has a plurality of mounting surfaces 101 extending inward from the inner wall of the door frame 10, the door shell 20 is fixed on the mounting surface 101, and the connection position between the door shell 20 and the door frame 10 is located on the mounting surface 101 inside the door frame 10. The outer wall of the door frame 10 is not easily deformed during assembly and foaming, and the gap between the door frame 10 and the cabinet board 30 is further reduced, thereby ensuring the integrity of the appearance of the built-in refrigerator door. Specifically, the door frame 10 includes two side columns 11 arranged at intervals and an upper cover 12 and a lower cover 13 arranged at intervals. The two side columns 11 and the upper cover 12 and the lower cover 13 are fixedly connected end to end in sequence; the side column 11 includes a connecting plate 111 and a first mounting plate 112 and a second mounting plate 113 arranged at intervals on the connecting plate 111, the mounting surface 101 is located on a side of the first mounting plate 112 away from the second mounting plate 113, the door 41 abuts against a side of the second mounting plate 113 away from the first mounting plate 112, and the cabinet The plate 30 abuts against the end surface of the connecting plate 111, and the door frame 10 is assembled separately through the side column 11, the upper cover 12 and the lower cover 13 to reduce the mold cost. In addition, the first mounting plate 112 and the second mounting plate 113 of the side column 11 are not only used to provide mounting positions for the door shell 20 and the door liner 41, but also can increase the structural strength of the side column 11, reduce the deformation of the connecting plate 111, and prevent the appearance of a gap between the cabinet plate 30 and the end surface of the connecting plate 111, thereby maintaining the integrity of the appearance of the built-in refrigerator door. In addition, folded edges 24 are provided around the edge of the door shell 20, and the first mounting plate 112 has a step on one side close to the connecting plate 111 to form a folded groove 102 with the connecting plate 111. The folded edge 24 is inserted into the folded groove 102. The length of the first mounting plate 112 is also smaller than the length of the connecting plate 111. The setting of the folded edge 24 further increases the structural strength of the edge of the door shell 20 and reduces the influence of the deformation of the door shell 20 on the installation of the cabinet panel 30. The insertion of the folded edge 24 into the folded groove 102 also facilitates the pre-fixation of the door shell 20 and the side column 11, thereby facilitating assembly.

[0050] See also Figure 5 Furthermore, in an embodiment provided in the present application, the side column 11 also includes a second reinforcing rib 114 located between the first mounting plate 112 and the second mounting plate 113 and fixed to the connecting plate 111. The second reinforcing rib 114 can not only further increase the structural strength of the side column 11, but also can be embedded in the thermal insulation body formed after the foaming agent is molded, which is beneficial to prevent the thermal insulation body from escaping from the filling space 2.

[0051] See also Figure 6 and Figure 7 , Figure 6 for Figure 1 The cross-sectional view of the built-in refrigerator door taken along the BB axis is shown. Figure 7 for Figure 6A partial enlarged view of the Y in the figure. Optionally, in one embodiment provided in the present application, in order to avoid the problem that the filling space 2 of the heat insulating body in the built-in refrigerator door is occupied by the concession space 1, resulting in a decrease in the heat insulation effect, the heat insulation body 40 also includes a first vacuum insulation panel 42 abutting against the side of the door shell 20 facing the filling space 2. The provision of the first vacuum insulation panel 42 also enables the heat insulation body 40 to maintain a good heat insulation effect at a relatively thin thickness, which is conducive to maintaining the existing thickness of the built-in refrigerator door and avoiding position interference with the installation of other components of the refrigerator.

[0052] See also Figure 7 Furthermore, since the door handle of the built-in refrigerator door is usually arranged near the upper cover 12, the thickness of the insulation body here is relatively thin, and the coldness of the refrigerator is easily diffused from here, resulting in a low temperature of the door handle, thereby causing condensation on the door handle, which affects the user experience. Based on this, the insulation body 40 also includes a second vacuum insulation panel 43 located in the filling space 2 and fixed on the side of the door liner 41 close to the upper cover 12, and the second vacuum insulation panel 43 overlaps with the projection of the first vacuum insulation panel 42 on the door shell 20. The second vacuum insulation panel 43 can increase the insulation effect of the side of the insulation body close to the upper cover 12, further slow down the transfer of coldness in the refrigerator, and avoid condensation problems caused by the low temperature at the door handle. In addition, the design of overlapping the projection of the second vacuum insulation panel 43 and the first vacuum insulation panel 42 on the door shell 20 is used to bend the coldness transfer path and minimize the leakage of refrigerator coldness. It is understandable that in other areas where cold leakage is likely to occur, vacuum insulation panels can be arranged at the door 41 in a targeted manner, and the positions of these vacuum insulation panels can be fixed by means of foaming process.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A built-in refrigerator door, characterized in that: include: Door frame (10); A door shell (20), wherein the periphery of the door shell (20) is fixedly mounted on the inner wall of the door frame (10) to form a filling space (2) and a clearance space (1) on both sides of the door shell (20); a cabinet board (30), the cabinet board (30) being mounted on the edge of the door shell (20) and abutting against the door frame (10) so as to cover the clearance space (1), the middle portion of the cabinet board (30) being spaced apart from the door shell (20); and A heat-insulating body (40), the heat-insulating body (40) comprising a door liner (41) covering the filling space (2) and a heat-insulating body filling the filling space (2).

2. The built-in refrigerator door according to claim 1, characterized in that: The middle portion of the door shell (20) has a sinking groove (21) that is recessed toward the filling space (2).

3. The built-in refrigerator door according to claim 2, characterized in that: The door shell (20) also has a plurality of first reinforcing ribs (22) located in the sinking groove (21).

4. The built-in refrigerator door according to claim 1, characterized in that: The edge of the door shell (20) is provided with a plurality of snap-in grooves (23); the cabinet panel (30) comprises a panel body (31) and a plurality of hooks (32) extending from the panel body (31) toward the door shell (20); one end of the hook (32) away from the panel body (31) is snap-connected to the snap-in groove (23).

5. The built-in refrigerator door according to claim 4, characterized in that: The built-in refrigerator door further comprises a plurality of rivets (50) riveted to the door shell (20) and the door frame (10), and each of the clamping grooves (23) is correspondingly arranged on one side of the door shell (20) close to each of the rivets (50).

6. The built-in refrigerator door according to any one of claims 1 to 5, characterized in that: The door frame (10) has a plurality of installation surfaces (101) extending inwardly from the inner wall of the door frame (10), and the door shell (20) is fixed on the installation surfaces (101).

7. The built-in refrigerator door according to claim 6, characterized in that: The door frame (10) comprises two side columns (11) arranged at intervals and an upper cover (12) and a lower cover (13) arranged at intervals, wherein the two side columns (11) and the upper cover (12) and the lower cover (13) are fixedly connected end to end in sequence; The side column (11) includes a connecting plate (111) and a first mounting plate (112) and a second mounting plate (113) spaced apart from the connecting plate (111); the mounting surface (101) is located on a side of the first mounting plate (112) facing away from the second mounting plate (113); the door liner (41) abuts against a side of the second mounting plate (113) facing away from the first mounting plate (112); and the cabinet panel (30) abuts against an end face of the connecting plate (111).

8. The built-in refrigerator door according to claim 7, characterized in that: The side column (11) further comprises a second reinforcing rib (114) located between the first mounting plate (112) and the second mounting plate (113) and fixed to the connecting plate (111).

9. The built-in refrigerator door according to claim 7, characterized in that: The heat insulating body (40) further comprises a first vacuum heat insulating panel (42) abutting against a side of the door shell (20) facing the filling space (2).

10. The built-in refrigerator door according to claim 9, characterized in that: The heat-insulating body (40) further comprises a second vacuum insulation panel (43) located in the filling space (2) and fixedly mounted on a side of the door liner (41) close to the upper cover (12); the second vacuum insulation panel (43) and the first vacuum insulation panel (42) respectively overlap in their projection portions on the door shell (20).

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