Refrigerator

CN122961112APending Publication Date: 2026-10-23SHIMANO INC
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Patent Information

Application Number
CN202610388731.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2025-04-17
Filing Date
2026-03-27
Publication Date
2026-10-23

AI Technical Summary

Technical Problem

在这种情况下,当清除积存在冷藏箱的收容空间的液体时,难以从主体部的上部的开口排出液体

Benefits of technology

[0023]根据本发明,提供一种能够在设有排水用的通孔的同时将内部的收容空间的温度充分保持在低温的冷藏箱。

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a refrigeration container. The refrigeration container has a main body portion and a through-hole cover. The main body portion is box-shaped, and a through-hole for draining water is formed in a side wall. The through-hole cover is capable of opening and closing the through-hole, and the through-hole cover has a heat insulating material that covers the through-hole when viewed in a direction in which the through-hole penetrates the side wall. Thus, the temperature of the internal storage space can be sufficiently maintained at a low temperature while the through-hole for draining water is provided.
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Description

Technical Field

[0001] This invention relates to a cooler box. Background Technology

[0002] A refrigerator is known in the prior art, which has a box-shaped main body and a lid member disposed on the upper part of the main body in an openable and closable manner. The refrigerator is used, for example, to store caught fish or to cool beverages, by placing liquid in its internal containment space. In this case, when emptying the liquid accumulated in the refrigerator's containment space, it is difficult to drain the liquid from the opening at the top of the main body.

[0003] For example, in the refrigerator described in Patent Document 1, liquid accumulated in the containment space can be easily removed by providing a drainage hole in the side wall. Furthermore, the refrigerator described in Patent Document 1 is provided with a through-hole cover for opening and closing the through-hole.

[0004] [Existing Technical Documents] [Patent Literature]

[0005] Patent Document 1: Japanese Patent Publication No. 7311391 Summary of the Invention

[0006] [The technical problem that the invention aims to solve]

[0007] However, in the refrigerator described in Patent Document 1, the through-hole cover used for opening and closing the drainage hole has low thermal insulation performance, so the storage space of the refrigerator is easily affected by the external temperature.

[0008] The purpose of this invention is to provide a refrigerator that, while having a drainage hole, can maintain the temperature of the internal storage space at a sufficiently low temperature.

[0009] [Technical solutions used to solve technical problems]

[0010] (1) A refrigerator having a main body and a through-hole cover, wherein the main body is box-shaped and has a through-hole for drainage formed on the side wall; the through-hole cover is openable and closeable, and the through-hole cover has a heat-insulating material covering the through-hole when viewed from the through-hole through the side wall.

[0011] According to the above structure, the through-hole cover has heat-insulating material positioned where it overlaps with the through-hole when viewed from the through direction, thereby improving the heat insulation performance of the through-hole cover. Therefore, the refrigerator can easily maintain the temperature of the storage space at a low level, preserving the freshness of food and other items stored within.

[0012] (2) According to the refrigerator described in (1), one aspect of the present invention is that the through-hole cover is movable between a closed position where the through-hole is closed and an open position where the through-hole is open, the through-hole cover having a columnar portion that is inserted into the through-hole when in the closed position, and after the through-hole cover moves in the direction from the inside to the outside of the main body in the through direction, it rotates axially about the radial direction of the through-hole, thereby moving from the closed position to the open position.

[0013] According to the above structure, after the through-hole cover moves from the inside to the outside in the through-path direction, it rotates axially about the radial direction of the through-hole, thereby changing from the closed position to the open position. This structure suppresses interference between the through-hole and the through-hole cover when opening and closing. Therefore, the refrigerator can easily open and close the through-hole cover while it is insulated.

[0014] (3) According to the refrigerator box described in (2), one aspect of the present invention may be that the through-hole cover has a crank-shaped supported portion with the axial direction as the length direction, the supported portion is disposed above the columnar portion and connected to the columnar portion, and the main body portion has a support portion that supports the supported portion in a rotatable manner.

[0015] According to the above structure, the through-hole cover has a crank-shaped supported portion, thereby effectively suppressing interference between the through-hole and the through-hole cover when opening and closing. Therefore, the refrigerator can easily open and close the through-hole cover while it is insulated.

[0016] (4) According to the refrigerator box described in (2) or (3), one aspect of the present invention is that the inner diameter of the through hole increases as it moves from the inner side of the main body toward the outer side.

[0017] According to the above structure, the inner diameter of the through-hole increases at the outer end as it moves from the inside to the outside. Therefore, interference between the through-hole and the through-hole cover can be effectively suppressed when the cover is opened or closed. Thus, the refrigerator can easily open and close the through-hole cover while it is insulated.

[0018] (5) According to the refrigerator box described in (2) or (3), one aspect of the present invention may be that the heat insulation material is disposed inside the columnar part.

[0019] According to the above structure, by placing the heat insulation material inside the column component, the heat insulation performance of the through-hole cover can be effectively improved.

[0020] (6) According to the refrigerator box described in (2) or (3), one aspect of the present invention may be that the through-hole cover has a sealing element installed on the outer peripheral surface of the columnar portion.

[0021] According to the above structure, the through-hole cover has a sealing element installed on the outer peripheral surface of the columnar part, thereby preventing water leakage between the outer peripheral surface of the columnar part and the inner peripheral surface of the through-hole when the through-hole cover is closed.

[0022] [Invention Effects]

[0023] According to the present invention, a refrigerator is provided that can maintain the temperature of the internal containment space at a low temperature while having a drainage hole. Attached Figure Description

[0024] Figure 1 This is a perspective view of the refrigerator according to this embodiment.

[0025] Figure 2 yes Figure 1 The cross-sectional view of the refrigerator shown is F2-F2.

[0026] Figure 3 This is a three-dimensional diagram representing a through hole.

[0027] Figure 4 This is a three-dimensional view showing a through-hole cover that closes the through-hole.

[0028] Figure 5 This is a three-dimensional view of the through-hole cover, showing its state as viewed from the rear.

[0029] Figure 6 This indicates the open / closed state of the through-hole cover.

[0030] Figure 7 This indicates that the through-hole cover is in the open state of the through-hole.

[0031] [Explanation of reference numerals in the attached figures] 100: Refrigerated box; 1: Main body; 1s: Upper end; 11: Bottom wall; 12: Side wall; 12s: Inner surface; 12t: Outer surface; 12a: Recess; 12u: Outer periphery; 12b: Protrusion; 12m: Inner protrusion; 12n: Outer protrusion; 13: Reception space; 14: Thermal insulation material; 4: Through hole; 41: Front; 42: Rear; 42t: Rear end; 43: Stepped part; 5: Connecting part; 51: Main body of connecting part; 52: Guide part; 52s: Front end; 52t: Rear end; 53: Rotary support (support) 1: Part); 2: Cover part; 3: Through hole cover; 31: Cover part; 31s: Front surface; 31t: Rear surface; 31a: Knob part; 31p: Upper end; 32: Columnar part; 32a: Thermal insulation material; 32b: Seal; 32t: Outer peripheral surface; 32s: Front end; 33: Supported part; P1: Closed position; P2: Open position; H: Up and down direction; H1: Above; H2: Below; L: Front and back direction (through direction); L1: Front side; L2: Rear side; W: Left and right direction (radial, axial); W1: Right side; W2: Left side. Detailed Implementation

[0032] The refrigerator according to the embodiment will now be described with reference to the accompanying drawings. Furthermore, in each drawing, the scale of each structural component may be appropriately altered as needed to ensure that each component is visually observable.

[0033] Reference Figures 1 to 7 The refrigerator 100 according to this embodiment will be described. First, the refrigerator 100 as a whole will be described. However, the refrigerator 100 does not need to have all the structures described below, and some structures may be omitted appropriately.

[0034] Here, in the refrigerator 100, the direction orthogonal to the bottom surface is defined as the up-down direction H, the vertical top is defined as the top H1, and the vertical bottom is defined as the bottom H2.

[0035] like Figure 1 As shown, the refrigerator 100 has a main body 1, a lid 2, and a through-hole lid 3.

[0036] The main body 1 is a box-shaped component with a cooling function. The main body 1 is a cuboid-shaped component with an opening formed at its upper end 1s. The opening at the upper end 1s of the main body 1 is opened and closed by a cover component 2. The main body 1 has a rectangular plate-shaped bottom wall 11 and side walls 12 surrounding the bottom wall 11. A receiving space 13 is formed in the main body 1 through the bottom wall 11 and the side walls 12. The receiving space 13 is a space surrounded by the bottom wall 11, the side walls 12, and the cover component 2. When the opening at the upper end 1s of the main body 1 is closed by the cover component 2, the receiving space 13 achieves cooling.

[0037] like Figure 2As shown, the interior of the bottom wall 11 and side walls 12 is hollow, and a heat-insulating material 14 is disposed inside. The bottom wall 11 and side walls 12 are made of synthetic resin such as polypropylene. The heat-insulating material 14 is, for example, a foamed heat-insulating material composed of foam such as polyurethane foam. Furthermore, the heat-insulating material 14 is not limited to foamed heat-insulating materials filled inside. For example, air within the hollow portion of the bottom wall 11 and side walls 12 can also be used as the heat-insulating material. Additionally, the heat-insulating material 14 can also use or be combined with vacuum insulation panels, etc.

[0038] A through hole 4 for drainage is formed in the sidewall 12. The through hole 4 extends through the sidewall 12 from the inner surface 12s to the outer surface 12t.

[0039] Here, the penetration direction of the through hole 4 is defined as the front-to-back direction L. In the front-to-back direction L, the inner side of the main body 1 when viewed from the through hole 4 is defined as the front side L1, and the outer side is defined as the rear side L2. In addition, the direction orthogonal to the vertical direction H and the front-to-back direction L is defined as the left-to-right direction W. The right side when facing the front side L1 is defined as the right side W1, and the left side when facing the front side L1 is defined as the left side W2.

[0040] The through hole 4 is formed as a cylinder with the longitudinal direction L as its length. The through hole 4 has a front portion 41 and a rear portion 42 located on the rear side L2 of the front portion 41. The front portion 41 and the rear portion 42 are connected. The inner diameter of the front portion 41 is smaller than the inner diameter of the rear portion 42, and a stepped portion 43 is formed between the front portion 41 and the rear portion 42. The inner diameter of the rear portion 42 increases as it moves from the front side L1 to the rear side L2 in the rear end portion 42t.

[0041] like Figure 2 and Figure 3 As shown, the main body 1 has a connecting part 5. The connecting part 5 is a component that supports the through hole cover 3. The connecting part 5 is provided on the outer surface 12t of the side wall 12. The connecting part 5 is provided in the side wall 12 above the through hole 4 at H1. The connecting part body 51 constituting the connecting part 5 protrudes rearward from the outer surface 12t of the side wall 12 at L2. The connecting part 5 is a component that can be elastically deformed.

[0042] The connecting part 5 has a guide part 52 and a rotating support part (support part) 53. The guide part 52 is a component that guides the through-hole cover 3 in the front-rear direction L. The guide part 52 is a hole that passes through from the right end W1 of the connecting part body 51 to the left end W2 in the left-right direction W. When viewed from the left-right direction W, the guide part 52 is formed in the front-rear direction L.

[0043] The swivel support 53 is a component that rotatably supports the through-hole cover 3 along the left-right direction W. The swivel support 53 has a hole extending from the right end W1 of the connecting body 51 to the left end W2 along the left-right direction W. The swivel support 53 is located on the rear side L2 of the guide 52. The swivel support 53 communicates with the guide 52. The swivel support 53 is circular when viewed from the left-right direction W. The inner diameter of the swivel support 53 is larger than the width in the vertical direction H at the rear end 52t of the guide 52 when viewed from the left-right direction W.

[0044] The portion of the sidewall 12 with the through hole 4 is recessed from the surface toward the inside of the main body 1. Specifically, the lower end portion of the sidewall 12 has a recess 12a that is recessed from the surface toward the front L1, and the through hole 4 is provided in the recess 12a. By providing the recess 12a, the through hole cover 3 for opening and closing the through hole 4 is disposed in the recess 12a, thereby preventing the through hole cover 3 from protruding from the surface of the sidewall 12 toward the rear L2.

[0045] In the outer surface 12t of the sidewall 12, a protrusion 12b is formed on the outer periphery 12u of the through hole 4. The protrusion 12b protrudes rearward from the outer periphery 12u towards the rear L2. The protrusion 12b has an inner protrusion 12m and an outer protrusion 12n, the outer protrusion 12n being positioned radially outward of the through hole 4 than the inner protrusion 12m. The inner protrusion 12m is formed along the outer periphery of the through hole 4. The inner protrusion 12m is spaced apart at two locations in the circumferential direction of the through hole 4, and the pair of inner protrusions 12m are positioned in a rotationally symmetrical manner. Viewed from the front-rear direction L, the inner protrusion 12m is formed in an arc shape. The outer protrusion 12n is formed along the outer periphery of the through hole 4. The outer protrusion 12n is spaced apart at two locations in the circumferential direction of the through hole 4, and the pair of outer protrusions 12n are positioned in a rotationally symmetrical manner. Viewed from the front-rear direction L, the outer protrusion 12n is formed in an arc shape.

[0046] like Figure 4 As shown, the through-hole cover 3 is a component used to open and close the through-hole 4. The through-hole cover 3 can be in the closed position P1 where the through-hole 4 is closed and in the open position P2 where the through-hole 4 is open (see reference). Figure 7 The through-hole cover 3 moves from the rear side L2 in the forward-backward direction L, and then rotates axially in the left-right direction W, thereby moving from the closed position P1 to the open position P2. (Example:) Figure 5 As shown, the through-hole cover 3 has a covering part 31, a columnar part 32, and a supported part 33.

[0047] Viewed from the rear L2, the cover 31 is a component that covers the through hole 4. For example... Figure 4As shown, the cover portion 31 is provided on the rear side L2 of the through hole 4. The cover portion 31 is provided below the connecting portion 5 on the lower side H2. Viewed from the front-rear direction L, the cover portion 31 is formed into a circle. A knob portion 31a is formed on the rear surface 31t of the cover portion 31. The knob portion 31a protrudes from the rear surface 31t of the cover portion 31 toward the rear side L2.

[0048] The columnar portion 32 is a component that penetrates the through hole 4. For example... Figure 5 As shown, a columnar portion 32 is provided on the front side L1 of the cover portion 31. The columnar portion 32 protrudes from the front surface 31s of the cover portion 31 towards the front side L1. The columnar portion 32 is formed in a cylindrical shape. The outer diameter of the columnar portion 32 is slightly smaller than the inner diameter of the through hole 4. The columnar portion 32 is inserted into the rear portion 42 of the through hole 4 and is locked by abutting against the stepped portion 43.

[0049] like Figure 2 As shown, the interior of the columnar portion 32 is hollow. A heat-insulating material 32a is provided inside the columnar portion 32. The heat-insulating material 32a is a component that covers the through-hole 4 when viewed from the rear side L2. The heat-insulating material 32a is, for example, a foamed heat-insulating material made of a foam such as foamed polyurethane. Furthermore, the heat-insulating material 32a is not limited to foamed heat-insulating materials filling the interior of the columnar portion 32. For example, air within the hollow portion of the columnar portion 32 can also be used as the heat-insulating material.

[0050] A seal 32b is installed on the outer peripheral surface 32t of the columnar portion 32. The seal 32b is a component that prevents liquid from leaking out between the inner peripheral surface of the through hole 4 and the outer peripheral surface 32t of the columnar portion 32. The seal 32b is provided at the front end 32s of the columnar portion 32. The seal 32b is, for example, a ring-shaped component made of rubber.

[0051] like Figure 4 As shown, the supported part 33 is a component supported by the connecting part 5. (As indicated...) Figure 5 As shown, the supported portion 33 is positioned above the columnar portion 32 at H1. The supported portion 33 is connected to the upper end portion 31p of the covering portion 31. That is, the supported portion 33 is connected to the columnar portion 32 through the covering portion 31. The supported portion 33 is formed in a crank shape with the left-right direction W as its length direction.

[0052] like Figure 4 As shown, the supported portion 33 engages with the rotating support portion 53 of the connecting portion 5. The supported portion 33 is capable of rotating about the rotating support portion 53 as the center and about the left-right direction W as the axis. During assembly, the supported portion 33 is inserted from the front end 52s of the guide portion 52, guided by the guide portion 52 along the front-rear direction L from the front side L1 to the rear side L2, and then over the step of the rear end 52t to engage with the rotating support portion 53.

[0053] Next, the function of the refrigerator 100 will be explained.

[0054] like Figure 2 As shown, when the through-hole cover 3 is in the closed position P1, the through-hole 4 is closed. At this time, the columnar portion 32 penetrates the through-hole 4, and the columnar portion 32 abuts against the stepped portion 43. Furthermore, when viewed from the rear side L2, the through-hole 4 is covered by the heat-insulating material 32a.

[0055] like Figure 6 As shown, the through-hole cover 3 can move rearward L2 from the closed position P1. The supported portion 33 is formed in a crank shape, so the through-hole cover 3 can move in the front-rear direction L. At this time, since the connecting portion 5 is configured to be elastically deformable, the supported portion 33 can be slightly offset upward H1.

[0056] like Figure 7 As shown, by rotating the through-hole cover 3 about the supported part 33 and along the left-right direction W, the through-hole cover 3 is moved to the open position P2. When the through-hole cover 3 is in the open position P2, the through hole 4 is open. When the through hole 4 is open, the liquid accumulated in the receiving space 13 can be drained.

[0057] As described above, after the through-hole cover 3 moves rearward to L2, it rotates axially in the left-right direction W, thereby moving from the closed position P1 to the open position P2. Additionally, after rotating axially in the left-right direction W, the through-hole cover 3 moves forward to L1, thereby moving from the open position P2 to the closed position P1.

[0058] The refrigerator 100 according to this embodiment has a main body 1 and a through-hole cover 3. The main body 1 is box-shaped, and a through-hole 4 for drainage is formed on its side wall 12. The through-hole cover 3 can open and close the through-hole 4. The through-hole cover 3 has a heat-insulating material 32a that covers the through-hole 4 when viewed from the front-back direction (through direction) L through the side wall 12, thereby improving the heat insulation performance of the through-hole cover 3. Therefore, the refrigerator 100 is configured to easily maintain the temperature of the storage space 13 at a low temperature, thus maintaining the freshness of the food and other items stored in the storage space 13.

[0059] According to the refrigerator 100 of this embodiment, the through-hole cover 3 can move between a closed position P1 (closing the through-hole 4) and an open position P2 (opening the through-hole 4). The through-hole cover 3 has a columnar portion 32 that is inserted into the through-hole 4 when in the closed position P1. After the through-hole cover 3 moves to the rear side (from the inside to the outside of the main body 1) L2 in the forward-backward direction (through direction) L, it rotates axially in the left-right direction (radial direction of the through-hole 4) W, thereby moving from the closed position P1 to the open position P2. Thus, interference between the through-hole 4 and the through-hole cover 3 can be suppressed when the through-hole cover 3 is opened and closed. Therefore, the refrigerator 100 is configured such that the through-hole cover 3 can be easily opened and closed while the through-hole cover 3 is provided with heat-insulating material 32a.

[0060] According to the refrigerator 100 of this embodiment, the through-hole cover 3 has a crank-shaped supported portion 33 with the length direction W in the left-right direction (axial direction). The supported portion 33 is disposed above the columnar portion 32 H1 and connected to the columnar portion 32. The main body portion 1 has a rotatable support portion (support portion) 53 that supports the supported portion 33 in a rotatable manner. As a result, interference between the through-hole 4 and the through-hole cover 3 can be effectively suppressed when the through-hole cover 3 is opened and closed. Therefore, the refrigerator 100 is configured such that the through-hole cover 3 can be easily opened and closed while the through-hole cover 3 is provided with heat insulation material 32a.

[0061] According to the refrigerator 100 of this embodiment, the inner diameter of the through hole 4 increases towards the rear (from the inner side to the outer side of the main body 1) L2, thereby effectively suppressing interference between the through hole 4 and the through hole cover 3 when the through hole cover 3 is opened and closed. Therefore, the refrigerator 100 is configured such that the through hole cover 3 can be easily opened and closed while the heat insulation material 32a is provided on the through hole cover 3.

[0062] According to the refrigerator 100 of this embodiment, by providing the heat insulation material 32a inside the columnar portion 32, the heat insulation performance of the through-hole cover 3 can be effectively improved.

[0063] According to the refrigerator 100 of this embodiment, the through-hole cover 3 is configured to have a sealing member 32b installed on the outer peripheral surface 32t of the columnar portion 32, thereby preventing water leakage between the outer peripheral surface 32t of the through-hole cover 3 and the inner peripheral surface of the through-hole 4 when the through-hole cover 3 closes the through-hole 4.

[0064] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to these embodiments, and design changes are included without departing from the spirit of the present invention. Furthermore, the structural elements shown in the above embodiments can be appropriately combined to form a complete system.

[0065] In the refrigerator 100 according to this embodiment, it is preferable that the through-hole cover 3 can move between a closed position P1 (closing the through-hole 4) and an open position P2 (opening the through-hole 4). The through-hole cover 3 has a columnar portion 32 that inserts into the through-hole 4 when in the closed position P1. After moving to the rear side L2 in the forward-backward direction L, the through-hole cover 3 rotates axially in the left-right direction W, thereby moving from the closed position P1 to the open position P2. However, the structure of the through-hole 4 and the through-hole cover 3 is not limited to this. For example, it may also be configured such that the through-hole cover 3 moves from the closed position P1 to the open position P2 by rotating axially in the up-down direction H. Alternatively, it may be configured such that external threads are formed on the outer surface of the through-hole cover 3 and on the inner surface of the through-hole 4, allowing the through-hole cover 3 to screw into the through-hole 4. The refrigerator 100 only needs to have a structure in which the through-hole cover 3 can easily open and close the through-hole 4.

[0066] In the refrigerator 100 according to this embodiment, it is preferable that the through-hole cover 3 has a crank-shaped supported portion 33 with the left-right direction W as its length direction. This supported portion 33 is disposed above the columnar portion 32 H1 and connected to the columnar portion 32. The main body portion 1 has a rotatable support portion 53 that supports the supported portion 33 in a rotatable manner. However, the structure of the through-hole 4 and the through-hole cover 3 is not limited to this. For example, the supported portion 33 may be formed in the main body portion 1, and the rotatable support portion 53 may be formed in the through-hole cover 3. The refrigerator 100 can be made as long as it adopts a structure in which the through-hole 4 can be easily opened and closed with the through-hole cover 3.

[0067] In the refrigerator 100 according to this embodiment, it is preferable that the inner diameter of the through hole 4 increases as it moves towards the rearward side L2, but the structure of the through hole 4 and the through hole cover 3 is not limited to this. For example, the outer diameter of the through hole cover 3 may also decrease as it moves towards the frontward side L1. The refrigerator 100 only needs to have a structure in which the through hole cover 3 can be easily opened and closed.

[0068] In the refrigerator 100 according to this embodiment, it is preferable that the heat insulation material 32a is disposed inside the columnar portion 32, but the structure of the through-hole cover 3 is not limited to this. For example, the heat insulation material 32a may also be disposed inside the covering portion 31. The refrigerator 100 can be made of any structure that can effectively improve the heat insulation performance of the through-hole cover 3.

[0069] In the refrigerator 100 according to this embodiment, it is preferable that the through-hole cover 3 has a sealing member 32b installed on the outer peripheral surface 32t of the columnar portion 32, but the structure of the through-hole cover 3 is not limited to this. For example, the outer peripheral surface 32t of the columnar portion 32 can be formed of a rubber component. The refrigerator 100 only needs to adopt a structure that can prevent water leakage from the outer peripheral surface 32t of the through-hole cover 3 and the inner peripheral surface of the through-hole 4 when the through-hole 4 is closed.

Claims

1. A refrigerator, characterized in that, It has a main body and a through-hole cover, wherein, The main body is box-shaped, and drainage holes are formed in the side walls; The through-hole cover can open and close the through-hole. The through-hole cover has a heat-insulating material that covers the through-hole when viewed from the through-hole through the sidewall.

2. The refrigerator according to claim 1, characterized in that, The through-hole cover is movable between a closed position (closing the through-hole) and an open position (opening the through-hole). The through-hole cover has a columnar portion that is inserted into the through-hole when it is in the closed position. After the through-hole cover moves in the direction from the inside to the outside of the main body in the through direction, it rotates about the radial direction of the through hole as the axis, thereby moving from the closed position to the open position.

3. The refrigerator according to claim 2, characterized in that, The through-hole cover has a crank-shaped supported portion along the axial direction, which is disposed above and connected to the columnar portion. The main body has a support portion that rotatably supports the supported portion.

4. The refrigerator according to claim 2 or 3, characterized in that, The inner diameter of the through hole increases as it moves from the inner side of the main body toward the outer side.

5. The refrigerator according to claim 2 or 3, characterized in that, The thermal insulation material is disposed inside the columnar portion.

6. The refrigerator according to claim 2 or 3, characterized in that, The through-hole cover has a seal that is mounted on the outer peripheral surface of the columnar portion.