Refrigerator

Abstract

The present application provides a kind of refrigeration box.The refrigeration box has main body part, through hole cover and cylindrical portion, wherein the main body part is box-shaped and is formed with drainage through hole, the through hole penetrates the side wall from the inner surface side to the outer surface side;The through hole cover can open and close the through hole;The cylindrical portion is fixed in the through hole in the state of inserting the through hole, the inside of the cylindrical portion is for liquid flow, the through hole has protruding part from the inner surface to the radial inner side of the through hole, the end of the cylindrical portion in the inner surface side has recess, the recess is recessed from the outer surface to the radial inner side, and is embedded with the protruding part.Accordingly, while the through hole for drainage is provided, the manufacturing cost can be controlled, and the water passage part for liquid flow in the through hole is formed with step or gap.

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, by providing drainage holes in the side wall, liquid accumulated in the containment space can be easily removed. Furthermore, the refrigerator described in Patent Document 1 includes a cylindrical portion that penetrates the drainage hole and allows liquid flow within it, preventing the formation of steps or gaps in the liquid flow passage. Therefore, the water passage is easy to clean, and the accumulation of dirt in the water passage is prevented. The relative position of the drainage hole and the cylindrical portion is determined by the internal thread formed on the inner circumferential surface of the drainage hole and the external thread formed on the outer circumferential surface of the cylindrical portion.

[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, in order to determine the relative position of the through hole and the cylindrical part, it is necessary to form an internal thread on the inner circumferential surface of the through hole and an external thread on the outer circumferential surface of the cylindrical part, which results in a high cost in the manufacturing process.

[0008] The purpose of this invention is to provide a refrigerator that can reduce manufacturing costs while having a drainage hole, and to prevent the formation of steps or gaps in the water passage for liquid flow in the hole.

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

[0010] (1) One aspect of the present invention is a refrigerator having a main body, a through-hole cover and a cylindrical part, wherein the main body is box-shaped and has a through-hole for drainage, the through-hole penetrating the sidewall from the inner surface side to the outer surface side; the through-hole cover can open and close the through-hole; the cylindrical part is fixed in the through-hole in a state of being inserted into the through-hole, and liquid flows inside it; the through-hole has a protrusion protruding from the inner surface toward the radially inner side of the through-hole; the cylindrical part has a recess at the end on the inner surface side, the recess being recessed from the outer surface toward the radially inner side and fitting with the protrusion.

[0011] According to the above structure, the through-hole has a protrusion, and the cylindrical part has a recess that fits into the protrusion. Therefore, it is possible to determine the relative position of the through-hole and the cylindrical part without forming internal and external threads on the inner surface of the through-hole and the outer surface of the cylindrical part. This allows for the suppression of manufacturing costs while preventing the formation of steps or gaps in the water passage through which liquid flows in the through-hole. Therefore, the above-described refrigerator configuration, while suppressing manufacturing costs, facilitates cleaning of the water passage and prevents the accumulation of dirt in the water passage.

[0012] (2) According to the refrigerator of (1), one aspect of the present invention may be that the main body has a cylindrical engaging member, which has the protrusion formed on its inner surface and a connecting portion formed on the main body, the connecting portion having a first region and a second region, wherein the first region extends from the inner surface side to the outer surface side through the sidewall and is fitted with the engaging member; the inner diameter of the second region is smaller than that of the first region, and the through hole is formed by the inner surface of the engaging member and the second region.

[0013] In this case, the protrusion is formed in the engaging component, thereby enabling the sidewall and the protrusion to be separately constructed, further suppressing the manufacturing cost of forming the protrusion.

[0014] (3) According to (1) or (2) the refrigerator, one aspect of the present invention may be that the protrusion is formed in a plurality of spaced intervals along the circumference of the through hole, and the recess is formed in a plurality of spaced intervals along the circumference.

[0015] In this configuration, multiple convex and concave portions are formed at circumferential intervals, thereby facilitating the determination of the relative position between the through-hole and the cylindrical portion. Furthermore, this further suppresses relative movement of the cylindrical portion relative to the through-hole.

[0016] (4) According to any one of (1) to (3), one aspect of the present invention may be that, when viewed radially from the through hole, the protrusion is formed from one end to the other in a manner inclined relative to the through direction of the through hole, and when viewed radially from the other end, the recess is formed from one end to the other in a manner inclined relative to the through direction, and the protrusion and the recess are engaged while rotating axially about the through direction.

[0017] In this configuration, the protrusion and concave parts engage while rotating axially in the through-hole direction, thereby facilitating the determination of the relative position between the through-hole and the cylindrical portion. Furthermore, it further suppresses relative movement of the cylindrical portion relative to the through-hole.

[0018] (5) According to any one of (1) to (4) the refrigerator, one aspect of the present invention may be that the protrusion is formed at the end of the inner surface side of the end of the through hole.

[0019] In this configuration, the protrusion is formed at the end of the inner surface of the sidewall of the end of the through hole, and thus the recess is also formed at the front end of the cylindrical portion. Therefore, the length of the cylindrical portion penetrating the through hole can be sufficiently ensured, and the relative position of the through hole and the cylindrical portion can be easily determined. In addition, the relative movement of the cylindrical portion relative to the through hole is further suppressed.

[0020] (6) The refrigerator according to any one of (1) to (5) can be provided in one aspect of the invention as having a seal installed on the outer peripheral surface of the cylindrical portion.

[0021] In this case, the refrigerator has a seal, which prevents liquid from leaking between the through-hole and the cylindrical part.

[0022] [Invention Effects]

[0023] According to the present invention, a refrigerator can be provided that can suppress manufacturing costs while providing a drainage hole, and prevent the formation of steps or gaps in the water passage for liquid flow in the 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 of the through-hole, showing the state as observed from the inside of the refrigerator.

[0028] Figure 5 It is a three-dimensional diagram representing the connected parts.

[0029] Figure 6 This is a three-dimensional diagram showing the engaging components.

[0030] Figure 7 This is a three-dimensional view showing the engaging component.

[0031] Figure 8 This is a three-dimensional view of the cover component.

[0032] Figure 9 This is a three-dimensional view of the cover component.

[0033] Figure 10 This is a three-dimensional view showing the lower part of the refrigerator.

[0034] Figure 11 This is a three-dimensional view showing the lower part of the refrigerator, representing its appearance as seen from the inside.

[0035] [Explanation of reference numerals in the attached figures] 100: Refrigerator; 1: Main body; 1s: Top end; 11: Bottom wall; 12: Side wall; 12a: Recess; 12s: Inner surface; 12t: Outer surface; 13: Reception space; 14: Insulation material; 5: Through hole; 6: Connecting part; 61: First region; 62: Second region; 62s: Inner surface; 63: Stepped part; 7: Engaging part; 7s: Inner surface; 7q: Rear surface; 71: Protrusion; 71s: Front end (one end); 71t: Rear end (the other end); 2: Cover part; 3: Cover part; 31: Cylindrical part; 31s: Inner surface; 31t: Outer surface; 31p: Front end; 34: Water passage; 35: Recess; 35s: Front end (one end) 35t: Rear end (other end); 32: Plate-like part; 32t: Rear surface; 32u: Outer periphery; 32a: Threaded hole; 32b: Protrusion; 32m: Inner protrusion; 32n: Outer protrusion; 33: Connecting part; 33a: Main body of connecting part; 36: Support part; 37: Seal; 4: Through-hole cover; 41: Supported part; N: Screw; H: Up and down direction; H1: Above; H2: Below; L: Front and back direction (through direction); L1: Front side (inner surface side); L2: Rear side (outer surface side); W: Left and right direction; W1: Right side; W2: Left side; R: Radial; R1: Inner side (radial inner side); R2: Outer side (radial outer side); C: Circumferential. Detailed Implementation

[0036] 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.

[0037] Reference Figures 1 to 11 The refrigerator 100 according to this embodiment will be described. First, the refrigerator 100 as a whole will be described. Note that the refrigerator 100 does not need to have all the structures described below, and some structures may be omitted appropriately.

[0038] 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.

[0039] Refrigerated container 100 is a cooler container capable of keeping the items inside cool. For example... Figure 1 As shown, the refrigerator 100 has a main body 1, a lid part 2, a cover part 3, and a through-hole cover 4.

[0040] 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 the upper end 1s. The opening formed 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. The bottom wall 11 and side walls 12 are made of, for example, a synthetic resin such as polypropylene.

[0041] like Figure 2 As shown, a receiving space 13 is formed in the main body 1 by the bottom wall 11 and the side wall 12. The receiving space 13 is a space surrounded by the bottom wall 11, the side wall 12 and the cover member 2. When the opening formed at the upper end 1s of the main body 1 is closed by the cover member 2, the receiving space 13 achieves cold preservation.

[0042] The interior of the bottom wall 11 and side walls 12 is hollow, and a heat insulation material 14 is disposed inside. The heat insulation material 14 is, for example, a foamed heat insulation material made of foam such as polyurethane foam. However, the heat insulation material 14 is not limited to foamed heat insulation materials that fill the interior. For example, air in the hollow portion of the bottom wall 11 and side walls 12 can also be used as the heat insulation material. In addition, the heat insulation material 14 can also use or be combined with vacuum insulation panels, etc.

[0043] like Figure 3 and Figure 4 As shown, a drainage through hole 5 is formed in the side wall 12. The through hole 5 is provided in the lower end portion of the side wall 12. A recessed portion 12a is formed in the lower end portion of the side wall 12, extending from the surface forward to the L1, and the through hole 5 is provided in the recessed portion 12a. The through hole 5 extends from the inner surface 12s of the side wall 12 to the outer surface 12t. The through hole 5 is formed in a cylindrical shape. The through hole 5 is formed by the inner surface 62s of the connecting portion 6 (described later) and the inner surface 7s of the engaging member 7 (described later).

[0044] Here, the penetration direction of the through hole 5 is defined as the front-to-back direction L. In the front-to-back direction L, the inner surface side of the main body 1 when viewed from the through hole 5 is designated as the front side L1, and the outer surface side is designated as the rear side L2. Furthermore, the direction orthogonal to the vertical direction H and the front-to-back direction L is defined as the left-to-right direction W, where the right side facing the front side L1 is designated as the right side W1, and the left side facing the front side L1 is designated as the left side W2. Additionally, the radial direction of the through hole 5 is defined as the radial direction R, with the inner radial side designated as the inner side R1 and the outer radial side designated as the outer side R2. Finally, the circumferential direction of the through hole 5 is defined as the circumferential direction C.

[0045] like Figure 5 As shown, a connecting portion 6 is formed in the sidewall 12. The connecting portion 6 extends from the inner surface 12s of the sidewall 12 to the outer surface 12t. The connecting portion 6 is cylindrical. The connecting portion 6 has a first region 61 and a second region 62. The first region 61 constitutes the front end of the connecting portion 6. The engaging member 7, described later, is installed in the first region 61. The second region 62 constitutes the rear end of the connecting portion 6 and is located behind the first region 61. The first region 61 and the second region 62 are adjacent in the front-rear direction L. The inner diameter of the second region 62 is smaller than that of the first region 61, and a step portion 63 is formed between the first region 61 and the second region 62 in the front-rear direction L. The inner surface 62s of the second region 62 forms the rear end of the through hole 5.

[0046] like Figure 3 and Figure 4 As shown, the main body 1 has a locking member 7. The locking member 7 is a component installed in the first region 61 of the connecting portion 6. The locking member 7 is installed in the first region 61 in a state where it is adjacent to the second region 62 in the front-rear direction L. At this time, the rear surface 7q of the locking member 7 (refer to...) Figure 6 The engaging member 7 is in contact with the stepped portion in the front-back direction. The engaging member 7 is cylindrical. The inner diameter of the engaging member 7 is approximately equal to the inner diameter of the second region 62. The inner surface 7s of the engaging member 7 forms the front end of the through hole 5. The inner surface 62s of the second region 62 and the inner surface 7s of the engaging member 7 are connected in the front-back direction L. The engaging member 7 is made, for example, of a synthetic resin such as polypropylene.

[0047] like Figure 6 and Figure 7 As shown, a protrusion 71 is formed on the inner surface 7s (the front end of the through hole 5) of the engaging member 7. The protrusion 71 protrudes inwardly R1 from the inner surface 7s of the engaging member. Viewed radially R, the protrusion 71 is formed inclined relative to the front-rear direction L from the front end 71s to the rear end 71t. The width of the rear end of the protrusion 71 in the circumferential direction C decreases from the front side L1 to the rear side L2. Viewed radially, the protrusion 71 is formed in a pentagonal shape. Multiple protrusions 71 are formed at intervals along the circumferential direction C. In this embodiment, nine protrusions 71 are formed.

[0048] Cover component 3 is a component that covers the through hole 5.

[0049] like Figure 8 and Figure 9 As shown, the cover component 3 has a cylindrical portion 31, a plate-shaped portion 32, and a connecting portion 33.

[0050] The cylindrical portion 31 is a component fixed to the through hole 5 in a state of being inserted through the through hole 5. The cylindrical portion 31 is formed in a cylindrical shape. The outer diameter of the cylindrical portion 31 is slightly larger than the inner diameter of the through hole 5. The length of the cylindrical portion 31 in the front-rear direction L is approximately equal to the length of the through hole 5 in the front-rear direction L. The inner surface 31s of the cylindrical portion 31 is formed smoothly. The space surrounded by the inner surface 31s of the cylindrical portion 31 is called the water passage portion 34, which allows liquid to flow.

[0051] A recess 35 is formed on the outer surface 31t of the cylindrical portion 31. The recess 35 is a component that engages with the protrusion 71. The recess 35 is recessed inward R1 from the outer surface 31t of the cylindrical portion 31. The recess 35 is formed at the front end of the cylindrical portion 31. The recess 35 is formed at the front end 31p of the cylindrical portion 31. Therefore, viewed from the front L1, the portion of the front end face of the cylindrical portion 31 in which the recess 35 is formed is recessed towards the rear L2. Viewed radially R, the recess 35 is formed inclined from the front end 35s to the rear end 35t relative to the front-rear direction L. The protrusion 71 and the recess 35 engage while rotating axially in the front-rear direction L. Multiple recesses 35 are formed at intervals along the circumferential direction C. In this embodiment, nine recesses 35 are formed.

[0052] A seal 37 is installed on the outer surface 31t of the cylindrical portion 31. The seal 37 is a component that prevents liquid from leaking out between the inner surface of the through hole 5 and the outer surface 31t of the cylindrical portion 31. The seal 37 is, for example, a ring-shaped component made of rubber.

[0053] The plate-shaped portion 32 is a component with the front-to-back direction L as the thickness direction. The plate-shaped portion 32 is provided at the rear end of the cylindrical portion 31. The plate-shaped portion 32 extends along the outer periphery of the cylindrical portion 31. Viewed from the front-to-back direction L, the plate-shaped portion 32 is circular. A threaded hole 32a for a screw to pass through is formed at the lower end of the plate-shaped portion 32.

[0054] The connecting part 33 is a component that supports the through-hole cover 4. The connecting part 33 is provided on the rear surface 32t of the plate-shaped part 32. The connecting part 33 is provided above the cylindrical part 31 H1 in the plate-shaped part 32. The connecting part body 33a constituting the connecting part 33 protrudes rearward from the rear surface 32t of the plate-shaped part 32 L2.

[0055] A support portion 36 is formed in the connecting portion 33. The support portion 36 supports the through-hole cover 4 in a rotatable manner. The support portion 36 is a hole that extends from the right end W1 of the connecting portion body 33a to the left end W2. When viewed from the left and right direction W, the support portion 36 is formed in a circular shape.

[0056] A protrusion 32b is formed on the outer periphery 32u of the cylindrical portion 31 in the rear surface 32t of the plate-like portion 32. The protrusion 32b protrudes rearward from the outer periphery 32u. The protrusion 32b has an inner protrusion 32m and an outer protrusion 32n, the outer protrusion 32n being positioned R2 further outward than the inner protrusion 32m. The inner protrusion 32m is formed along the outer periphery of the cylindrical portion 31. The inner protrusion 32m is spaced apart at two locations along the circumferential direction C, and the pair of inner protrusions 32m are positioned in a rotationally symmetrical manner. Viewed from the front-rear direction L, the inner protrusion 32m is formed in an arc shape. The outer protrusion 32n is formed along the outer periphery of the cylindrical portion 31. The outer protrusion 32n is spaced apart at two locations along the circumferential direction C, and the pair of outer protrusions 32n are positioned in a rotationally symmetrical manner. Viewed from the front-rear direction L, the outer protrusion 32n is formed in an arc shape.

[0057] In the cover component 3, the cylindrical portion 31, the plate-shaped portion 32, and the connecting portion 33 are integrally formed. The cover component 3 is made of, for example, a synthetic resin such as polypropylene.

[0058] like Figure 1 As shown, the through-hole cover 4 is a cover for opening and closing the through-hole 5. Viewed from the front-rear direction L, the through-hole cover 4 is larger than the through-hole 5, and can cover the through-hole cover 4 from the rear side L2. A supported portion 41 is provided at the upper end of the through-hole cover 4, which is rotatably supported by the support portion 36. The supported portion 41 is formed as a rod with the length direction W in the left-right direction. The supported portion 41 is inserted into the support portion 36 and fits into the support portion 36. The supported portion 41 rotates about the support portion 36 and axially in the left-right direction W. The through-hole 5 is formed in the recess 12a, and the through-hole cover 4 is disposed in the recess 12a, thus preventing the through-hole cover 4 from protruding from the surface of the side wall 12 to the rear side L2. In addition, when the through-hole cover 4 is opened and closed while rotating about the support portion 36 and axially in the left-right direction W, it is guided by the outer protrusion 32n to avoid excessive proximity to the inner protrusion 32m. In particular, when the through-hole cover 4 is closed, the through-hole cover 4 moves diagonally forward and downward, but by being guided by the outer protrusion 32n, it is possible to prevent the through-hole cover 4 from getting stuck on the inner protrusion 32m. Therefore, the through-hole cover 4 is easy to close.

[0059] Next, the function of the refrigerator 100 will be explained.

[0060] like Figure 10 and Figure 11As shown, the cover member 3 is fixed relative to the side wall 12 with the cylindrical portion 31 inserted into the through hole 5. When the cylindrical portion 31 is inserted into the through hole 5, the recess 35 engages with the protrusion 71. Since the cylindrical portion 31 is inserted into the through hole 5 from the rear side L2 to the front side L1, the front end 35s of the recess 35 engages with the rear end 71t of the protrusion 71 first. The width of the rear end of the protrusion 71 in the circumferential direction C decreases from the front side L1 to the rear side L2, so the front end 35s of the recess 35 easily engages with the rear end 71t of the protrusion 71. The recess 35 advances from the rear side L2 to the front side L1 along the inclination of the protrusion 71. Therefore, the protrusion 71 and the recess 35 rotate and engage in the axial direction L. Furthermore, by taking the axial direction as the axis and rotating it in the opposite direction to the engagement, the engagement of the protrusion 71 and the recess 35 can be released.

[0061] After the cylindrical portion 31 is inserted through the through hole 5, the cover member 3 is fixed relative to the side wall 12. The cover member 3 is fixed relative to the side wall by passing the screw N through the threaded hole 32a of the plate-shaped portion 32 and screwing the screw N onto the side wall 12. At this time, since the screw N is inserted along the front-rear direction L, the cover member 3 is restricted from axial rotation in the front-rear direction L. On the other hand, if the engagement between the protrusion 71 and the recess 35 is not released, the cover member 3 will not detach from the side wall 12, and the engagement between the protrusion 71 and the recess 35 cannot be released without axial rotation in the front-rear direction L. Therefore, the cover member 3 is effectively fixed relative to the side wall 12.

[0062] When liquid accumulates in the containment space 13 of the refrigerator 100, the liquid can be drained by opening the through-hole cover 4 to open the through-hole 5. At this time, the liquid flows through the water passage 34 formed by the cylindrical portion 31 in the through-hole 5. Since the cylindrical portion 31 and the side wall 12 are separately constructed, the water passage 34 can be designed freely even while keeping costs down. For example, while keeping costs down, the water passage 34 can also be easily formed into a shape with fewer steps or gaps, thus creating a structure that is not easy to accumulate dirt and is easy to clean.

[0063] According to the refrigerator 100 of this embodiment, there is a main body 1, a through-hole cover 4, and a cylindrical part 31. The main body 1 is box-shaped and has a drainage through-hole 5, which extends from the front (inner surface) L1 to the rear (outer surface) L2 through the side wall 12. The through-hole cover 4 can open and close the through-hole 5. The cylindrical part 31 is fixed to the through-hole 5 in a state of being inserted into the through-hole 5, and its interior is used for liquid flow. The through-hole 5 has a protrusion that protrudes from the inner surface 7s inward (radially inward) R1. 71. The cylindrical portion 31 has a recess 35 at its front (inner surface) end L1. This recess 35 is recessed from the outer surface 31t inward (radially inward) R1 and engages with the protrusion 71. With this structure, the relative position of the through hole 5 and the cylindrical portion 31 can be determined without forming internal and external threads on the inner surface 7s of the through hole 5 and the outer surface 31t of the cylindrical portion 31. This allows for the suppression of manufacturing costs while preventing the formation of steps or gaps in the water passage 34 through which liquid flows in the through hole 5. Therefore, the refrigerator 100 is configured to facilitate cleaning of the water passage 34 and prevent the accumulation of dirt in the water passage 34 while suppressing manufacturing costs.

[0064] According to the refrigerator 100 of this embodiment, the main body 1 has a cylindrical engaging member 7, which has a protrusion 71 formed on its inner surface 7s and a connecting part 6 formed on the main body 1. The connecting part 6 has a first region 61 and a second region 62. The first region 61 extends from the front side (inner surface side) L1 to the rear side (outer surface side) L2 through the side wall 12 and is fitted with the engaging member 7. The inner diameter of the second region 62 is smaller than that of the first region 61. The through hole 5 is formed by the inner surface 7s of the engaging member 7 and the second region 62, thereby enabling the side wall 12 and the protrusion 71 to be constructed separately, further suppressing the manufacturing cost of forming the protrusion 71.

[0065] According to the refrigerator 100 of this embodiment, multiple protrusions 71 are formed at intervals along the circumferential direction C, and multiple recesses 35 are formed at intervals along the circumferential direction C. This structure makes it easy to determine the relative position of the through hole 5 and the cylindrical portion 31. In addition, it further suppresses the relative movement of the cylindrical portion 31 relative to the through hole 5.

[0066] According to the refrigerator 100 of this embodiment, viewed radially R, the protrusion 71 is formed inclined from the front end (one end) 71s to the rear end (the other end) 71t relative to the front-rear direction (through direction) L. Viewed radially R, the recess 35 is formed inclined from the front end (one end) 35s to the rear end (the other end) 35t relative to the front-rear direction (through direction) L. The protrusion 71 and the recess 35 are configured to fit together while rotating axially in the front-rear direction (through direction) L, thereby facilitating the determination of the relative position of the through hole 5 and the cylindrical portion 31. Furthermore, relative movement of the cylindrical portion 31 relative to the through hole 5 is further suppressed.

[0067] According to the refrigerator 100 of this embodiment, the protrusion 71 is formed at the end of the front side (inner surface side) L1 of the end of the through hole 5. With this structure, the recess 35 is also formed at the front end of the cylindrical portion 31. Therefore, the length of the cylindrical portion 31 inserted into the through hole 5 can be sufficiently ensured, and the relative position of the through hole 5 and the cylindrical portion 31 can be easily determined. In addition, the relative movement of the cylindrical portion 31 relative to the through hole 5 is further suppressed.

[0068] According to the refrigerator 100 of this embodiment, a sealing member 37 is installed on the outer surface 31t of the cylindrical part 31. With this structure, leakage of liquid from the through hole 5 and the cylindrical part 31 can be suppressed.

[0069] 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.

[0070] In the refrigerator 100 according to this embodiment, it is preferable that the through hole 5 has a protrusion 71 protruding inward from the inner surface 7s to the inner side R1, and the cylindrical portion 31 has a recess 35 recessed inward from the outer surface 31t to the inner side R1 and capable of engaging with the protrusion 71. However, the structures of the through hole 5 and the cylindrical portion 31 are not limited to this. For example, the through hole 5 may have a recessed portion recessed outward from the inner surface 7s to the outer side R2, and the cylindrical portion 31 may have a protrusion protruding outward from the outer surface 31t to the outer side R2 and capable of engaging with the recessed portion. The refrigerator 100 can be constructed as long as it has a structure that can determine the relative positions of the through hole 5 and the cylindrical portion 31.

[0071] In the refrigerator 100 according to this embodiment, preferably, the main body 1 has a cylindrical engaging member 7, which has a protrusion 71 formed on its inner surface 7s, and a connecting portion 6 formed on the main body 1. The connecting portion 6 has a first region 61 and a second region 62, wherein the first region 61 extends from the front side L1 to the rear side L2 through the side wall 12 and is fitted with the engaging member 7; the inner diameter of the second region 62 is smaller than that of the first region 61, and the through hole 5 is formed by the inner surface 7s of the engaging member 7 and the second region 62, but the structure of the main body 1 is not limited to this. For example, the main body 1 may not have the engaging member 7, and the side wall 12 and the protrusion 71 may be integrally formed. The main body 1 only needs to adopt a structure that can determine the relative position of the through hole 5 and the cylindrical portion 31.

[0072] In the refrigerator 100 according to this embodiment, it is preferable that a plurality of protrusions 71 are formed at intervals along the circumferential direction C, and a plurality of recesses 35 are formed at intervals along the circumferential direction C, but the structure of the protrusions 71 and the recesses 35 is not limited thereto. For example, one protrusion 71 and one recess 35 may be formed. The refrigerator 100 only needs to adopt a structure that can determine the relative position of the through hole 5 and the cylindrical portion 31.

[0073] In the refrigerator 100 according to this embodiment, viewed radially R, the protrusion 71 is formed inclined from the front end 71s to the rear end 71t relative to the front-rear direction L, and viewed radially R, the recess 35 is formed inclined from the front end 35s to the rear end 35t relative to the front-rear direction L. The protrusion 71 and the recess 35 fit together while rotating axially in the front-rear direction L, but the structure of the protrusion 71 and the recess 35 is not limited to this. For example, the protrusion 71 and the recess 35 can be formed along the front-rear direction L. The refrigerator 100 can be any structure that can determine the relative position of the through hole 5 and the cylindrical part 31.

[0074] In the refrigerator 100 according to this embodiment, it is preferable that the protrusion 71 is formed at the front end L1 of the end of the through hole 5, but the structure of the protrusion 71 is not limited to this. For example, the protrusion 71 may be provided at the rear end of the through hole 5. The refrigerator 100 can be made with a structure that can determine the relative position of the through hole 5 and the cylindrical portion 31.

[0075] In the refrigerator 100 according to this embodiment, it is preferable to have a sealing member 37 installed on the outer surface 31t of the cylindrical portion 31, but the structure of the refrigerator 100 is not limited to this. For example, the cylindrical portion 31, the through hole 5, and the cylindrical portion 31 can be fixed by welding. The refrigerator 100 only needs to adopt a structure that inhibits liquid leakage between the through hole 5 and the cylindrical portion 31.

Claims

1. A refrigerator, characterized in that, It has a main body, a through-hole cover, and a cylindrical part, wherein, The main body is box-shaped and has a drainage hole that extends through the sidewall from the inner surface to the outer surface. The through-hole cover can open and close the through-hole; The cylindrical portion is fixed in the through hole with its interior inserted, allowing liquid to flow through it. The through hole has a protrusion that protrudes radially inward from the inner surface toward the through hole. The cylindrical portion has a recess at its end on the inner surface side, which is recessed from the outer surface to the radially inner side and engages with the protrusion.

2. The refrigerator according to claim 1, characterized in that, The main body has a cylindrical engaging component, on which the protrusion is formed on the inner surface. A connecting portion is formed in the main body, the connecting portion having a first region and a second region, wherein the first region extends from the inner surface side to the outer surface side through the sidewall and is fitted with the engaging member; the inner diameter of the second region is smaller than that of the first region. The through hole is formed by the inner surface of the engaging component and the second region.

3. The refrigerator according to claim 1 or 2, characterized in that, The protrusions are formed in multiple spaced intervals along the circumference of the through hole. The recesses are formed in multiple spaced intervals along the circumference.

4. The refrigerator according to claim 1 or 2, characterized in that, Viewed radially from the through hole, the protrusion is formed at an angle relative to the through-hole direction from one end to the other. Viewed radially, the recess is formed at an angle relative to the through direction from one end to the other. The protrusion and the recess engage while rotating axially about the through direction.

5. The refrigerator according to claim 1 or 2, characterized in that, The protrusion is formed at the end of the through hole on the inner surface side of the through hole.

6. The refrigerator according to claim 1 or 2, characterized in that, It has a seal installed on the outer surface of the cylindrical part.

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