Heat preservation box

Abstract

The utility model provides a heat preservation box which comprises a box body, a heat preservation layer located between an outer wall and an inner wall is arranged on the box body, and a first drainage channel communicated with the outer wall and the inner wall is arranged on the box body. The combined limiting sleeve is installed on the first drainage channel, and a limiting interval for containing the outer wall and the inner wall is formed between the combined limiting sleeve and the first drainage channel; the drainage plug is movably arranged in the second drainage channel of the combined limiting sleeve, and an adjusting part exposed out of the box body is arranged at one end of the drainage plug; the sealing rubber part is arranged at the end, located in the second drainage channel, of the drainage plug. The utility model solves the technical problems that a common heat preservation box is made of plastic, a plug is often installed in a drain hole in a threaded connection mode in order to prevent the drain hole from being exposed for a long time, but the drain hole is prone to being damaged in the process of frequently disassembling and assembling the plug.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat preservation box, specifically, relates to a heat preservation box. BACKGROUND

[0002] The heat preservation box is applied more and more widely in people's life. Specifically, to ensure the heat preservation effect of the heat preservation box, it is often set as a double-layer structure nested inside and outside, and the space formed between the double-layer structure is used to play the heat preservation effect.

[0003] Further, the heat preservation box can be applied in the cold chain food field, and the objects for containing include vegetables, fruits, meat, poultry, eggs, quick-frozen food, packaged cooked food such as poultry, meat and aquatic products, ice cream and dairy products, etc. To facilitate the drainage of the water generated by the thawing of the food materials placed therein, a drain hole is often provided in the heat preservation box, and the drain hole is used for drainage.

[0004] However, the related art has at least one of the following problems: the common heat preservation box is made of plastic material, to avoid long-term exposure of the drain hole, a plug is often installed in the drain hole by threaded connection, but in the process of frequent disassembly and assembly of the plug, the drain hole is easily damaged. UTILITY MODEL CONTENTS

[0005] The utility model solves the problem that the common heat preservation box is made of plastic material, to avoid long-term exposure of the drain hole, a plug is often installed in the drain hole by threaded connection, but in the process of frequent disassembly and assembly of the plug, the drain hole is easily damaged.

[0006] To solve the above problems, the utility model provides a heat preservation box, which comprises: a box body, the box body is provided with a heat preservation layer between the outer wall and the inner wall, and is provided with a first drainage channel communicating with the outer wall and the inner wall; a combined limiting sleeve, the combined limiting sleeve is installed in the first drainage channel, and is provided with a limiting distance accommodating the outer wall and the inner wall; a drain plug, the drain plug is movably arranged in a second drainage channel of the combined limiting sleeve, and one end of the drain plug is provided with an adjusting part exposed outside the box body; a sealing rubber part, the sealing rubber part is arranged at the end position of the drain plug in the second drainage channel; wherein, when the adjusting part is adjusted to make the drain plug come out of the combined limiting sleeve, the second drainage channel is opened; when the adjusting part is adjusted to make the drain plug enter the combined limiting sleeve, the second drainage channel is blocked by the sealing rubber part.

[0007] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by arranging the combined limiting sleeve, the direct installation of the drain plug to the box body is avoided, the opening or closing of the second drain passage is realized by dismounting the drain plug in the combined limiting sleeve, and since the drain plug is not directly matched with the box body, that is, the indirect matching of the drain plug and the box body through the combined limiting sleeve is adopted, the influence of the dismounting of the drain plug on the box body is greatly reduced, and thus the service life of the box body is prolonged, and the risk of damage of the structure of the box body is reduced.

[0008] Further, since the combined limiting sleeve is nested with the box body, the stability of the installation of the combined limiting sleeve to the first drain passage is improved by arranging the limiting spacing, and the movement of the combined limiting sleeve relative to the box body is avoided; in addition, the sealing rubber piece arranged at the end of the drain plug further improves the sealing performance of the sealing of the second drain passage. In combination with the actual use scene of the heat preservation box, the risk of leakage of the accumulated water caused by the thawing of the food materials placed in the box body is reduced.

[0009] In an example of the present application, the combined limiting sleeve comprises: a first sleeve, which is arranged in the first drain passage, and one end of the first sleeve away from the inner wall is provided with a first stop portion, which abuts against the surface of the outer wall away from the inner wall; a second sleeve, which is screwed in the first sleeve, and one end of the second sleeve away from the outer wall is provided with a second stop portion, which abuts against the surface of the outer wall away from the inner wall; wherein the second drain passage is formed by the second sleeve, and the limiting spacing is formed by the first stop portion and the second stop portion.

[0010] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by utilizing the stopping effect of the first stop portion and the second stop portion, the stability of the installation of the combined limiting sleeve to the box body is improved, and the risk of accidental disengagement of the combined limiting sleeve from the first drain passage is reduced. In combination with the screwing cooperation mode between the first sleeve and the second sleeve, in the actual installation process, the first sleeve can be installed in the first drain passage from the outside of the box body to the inside, until the first stop portion abuts against the surface of the outer wall, and then the second sleeve is installed in the first sleeve from the inside to the outside, since the screwing depth of the first sleeve and the second sleeve is predetermined, when the first sleeve and the second sleeve are screwed in place, the limiting spacing formed between the first stop portion and the second stop portion is adapted to the spacing formed between the outer wall and the inner wall, and the screwing depth of the first sleeve and the second sleeve is effectively prevented from being too large, so that the outer wall and the inner wall are prevented from being deformed under the extrusion of the first stop portion and the second stop portion.

[0011] In an example of the present application, the drain plug is provided with a limiting clamping groove at one end away from the adjusting portion; and the sealing rubber piece is clamped in the limiting clamping groove.

[0012] Compared with the prior art, the technical effects reached by adopting the technical scheme are: for example, the sealing rubber part is in a ring structure, and is clamped into the limiting clamping groove by utilizing the elastic deformable feature of the sealing rubber part, so that the sealing rubber part can be driven to move together during the dismounting and mounting of the drain plug.

[0013] In an example of the utility model, the sealing rubber part comprises: a connecting part matched with the limiting clamping groove; a filling part connected to one side of the connecting part close to the side wall of the combined limiting sleeve; and a guide inclined surface arranged on the side of the filling part close to the side wall; wherein, when the drain plug is arranged in the second drain passage, the filling part is pressed between the connecting part and the side wall to block the second drain passage.

[0014] Compared with the prior art, the technical effects reached by adopting the technical scheme are: by arranging the guide inclined surface on the filling part, the diameter of the one end of the sealing rubber part is smaller than the diameter of the second sleeve, i.e. smaller than the diameter of the second drain passage, and the diameter of the other end of the sealing rubber part is larger than the diameter of the second drain passage. Thus, in combination with the above structural features of the sealing rubber part, the installation efficiency of mounting the drain plug into the second drain passage is improved, and the sealing effect of blocking the second drain passage is improved under the pressing action of the second sleeve and the drain plug on the sealing rubber part.

[0015] In an example of the utility model, a deformation interval is formed between the connecting part and the filling part; and the deformation interval is reduced when the filling part is pressed between the connecting part and the side wall.

[0016] In an example of the utility model, a second sealing ring is arranged between the second stop part and the inner wall; and / or, a first sealing ring is arranged between the first stop part and the adjusting part.

[0017] Compared with the prior art, the technical effects reached by adopting the technical scheme are: the sealing performance of blocking the second drain passage is further improved.

[0018] In an example of the utility model, the surface of the outer wall is provided with a sunken groove structure accommodating the first stop part; wherein, the surface of the first stop part is lower than or flush with the adjacent surface of the outer wall forming the sunken groove structure.

[0019] Compared with the prior art, the technical effects reached by adopting the technical scheme are: by arranging the sunken groove structure on the surface of the outer wall, the first stop part is prevented from protruding from the surface of the outer wall, so that the appearance of the heat preservation box is kept neat, and the floor space occupied by the heat preservation box is reduced.

[0020] In an example of the utility model, the side wall of the second sleeve is provided with an internal thread structure; and the surface of the drain plug is provided with an external thread structure screw-connected with the internal thread structure.

[0021] Or the side wall of the second sleeve is a light hole structure; the drain plug is sleeved in the light hole structure.

[0022] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: specifically, by making the drain plug and the second sleeve in a screwing fit, the stability of installing the drain plug into the second sleeve is improved, and the risk of the drain plug accidentally separating from the second sleeve is reduced.

[0023] In an example of the present application, the outer wall comprises a support wall and a wall body which are integrally formed with each other; the support wall is clamped between the inner wall and the wall body, and the first drainage channel is formed by being surrounded by the support wall; the wall body is arranged opposite to the inner wall, and the heat preservation layer is formed between the wall body and the inner wall.

[0024] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by integrally forming the support wall and the wall body, and by means of the support of the support wall and the cooperation of the combined limiting sleeve, the stability of the box body remaining unchanged during the assembly of the drain plug is improved.

[0025] In an example of the present application, the box body comprises an inner chamber surrounded by an inner wall, and the first drainage channel forms a first drainage opening in the side wall; the bottom surface of the inner chamber forms a recessed groove at a position corresponding to the first drainage opening.

[0026] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the drainage efficiency of the accumulated water in the inner chamber is further improved.

[0027] After adopting the technical scheme of the present application, the following technical effects can be achieved:

[0028] (1) By setting the combined limiting sleeve, the situation that the drain plug is directly installed into the box body is avoided, the effect of opening or closing the second drainage channel is realized by means of the disassembly and assembly of the drain plug in the combined limiting sleeve, and since the drain plug does not directly cooperate with the box body, i.e. by means of the indirect cooperation of the two through the combined limiting sleeve, the influence of disassembling and assembling the drain plug on the box body is greatly reduced, thereby the service life of the box body is improved, and the risk of damage to the structure of the box body is reduced.

[0029] Further, since the combined limiting sleeve and the box body are in a nested fit, the stability of installing the combined limiting sleeve into the first drainage channel is improved by means of the set limiting distance, and the movement of the combined limiting sleeve relative to the box body is avoided; in addition, by setting the sealing rubber piece at the end of the drain plug, the sealing performance of sealing the second drainage channel is further improved. In combination with the actual use scene of the insulation box, the risk of leakage of the accumulated water due to the thawing of the food placed in the box body is reduced.

[0030] (2) The stop effect of the first stop portion and the second stop portion improves the stability of the combined limiting sleeve installed on the box, and reduces the risk of accidental disengagement of the combined limiting sleeve from the first drainage channel. In combination with the screwing cooperation mode between the first sleeve and the second sleeve, in the actual installation process, the first sleeve can be installed in the first drainage channel from the outside of the box to the inside, until the first stop portion abuts against the surface of the outer wall, and then the second sleeve is installed in the first sleeve from the inside to the outside. Since the screwing depth of the first sleeve and the second sleeve is previously set, when the first sleeve and the second sleeve are screwed in place, the limiting distance between the first stop portion and the second stop portion is adapted to the distance formed between the outer wall and the inner wall, effectively avoiding the deformation of the outer wall and the inner wall under the extrusion of the first stop portion and the second stop portion due to the excessive screwing depth of the first sleeve and the second sleeve;

[0031] (3) By providing a guide slope on the filling portion, the diameter of the one end of the sealing rubber piece is smaller than the diameter of the second sleeve, that is, smaller than the diameter of the second drainage channel, and the diameter of the other end of the sealing rubber piece is larger than the diameter of the second drainage channel. Therefore, in combination with the above structural characteristics of the sealing rubber piece, the installation efficiency of the drainage plug into the second drainage channel is improved, and the sealing effect of the second drainage channel is improved under the extrusion of the second sleeve and the drainage plug on the sealing rubber piece. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A structure schematic view of a heat preservation box is provided in the embodiment of the present application.

[0033] Figure 2 A Figure 1 An explosion view of a partial structure from another perspective.

[0034] Figure 3 A Figure 2 An explosion view from another perspective.

[0035] Figure 4 A Figure 1 A cooperation relationship schematic view of a partial structure from still another perspective.

[0036] Figure 5 A Figure 4 A cooperation relationship schematic view of a structure after hiding the outer wall and the inner wall.

[0037] Figure 6 A Figure 4 An enlarged view of A in the embodiment.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 100. Insulated box; 101. Outer side; 102. Inner side; 10. Box body; 11. Outer wall; 111. Settling tank structure; 112. Support wall; 113. Wall body; 12. Inner wall; 13. Insulation layer; 14. First drainage channel; 20. Combined limiting sleeve; 21. Second drainage channel; 22. First sleeve; 221. First stop part; 23. Second sleeve; 231. Second stop part; 232. Side wall; 233. Internal thread structure; 24. Limiting distance; 30. Drain plug; 31. Adjustment part; 32. Limiting groove; 33. External thread structure; 40. Sealing rubber part; 41. Connecting part; 42. Filling part; 421. Guide slope; 43. Deformation distance; 51. Second sealing ring; 52. First sealing ring; 53. Cap structure. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] It needs to be emphasized that, Figure 2 and Figure 3 The outer and inner walls shown in the figure are schematic diagrams. Their disc-like shape does not represent their actual structural shape in the insulated box, but is only used to illustrate their relationship with other components.

[0042] See Figure 1 This is a structural schematic diagram of an insulated box 100 provided in an embodiment of this utility model. Combined with... Figures 2-6 The insulated box 100 specifically includes a box body 10, a combined limiting sleeve 20, a drain plug 30, and a sealing rubber component 40. The box body 10 has an insulation layer 13 located between the outer wall 11 and the inner wall 12, and is provided with a first drainage channel 14 connecting the outer wall 11 and the inner wall 12; the combined limiting sleeve 20 is installed in the first drainage channel 14, and is provided with a limiting distance 24 to accommodate the outer wall 11 and the inner wall 12; the drain plug 30 is movably disposed in the second drainage channel 21 of the combined limiting sleeve 20, and one end of the drain plug 30 is provided with an adjustment part 31 exposed to the outside of the box body 10; the sealing rubber component 40 is disposed at the end position of the drain plug 30 located in the second drainage channel 21; wherein, when the adjustment part 31 is adjusted to make the drain plug 30 disengage from the combined limiting sleeve 20, the second drainage channel 21 is opened; when the adjustment part 31 is adjusted to make the drain plug 30 enter the combined limiting sleeve 20, the sealing rubber component 40 seals the second drainage channel 21.

[0043] In one specific example, the box 10 is usually made of plastic material, and in the related technical solution, the drainage channel formed on the box 10 usually has a threaded structure, and the drainage plug 30 is directly installed on the box 10 by screwing. In combination with the characteristics of the double-walled structure of the heat preservation box 100, it is easy to cause deformation of the corresponding part of the box 10 under the action of the tightening force during the tightening of the drainage plug 30, for example, the double walls deform and move close to each other. In addition, in combination with the above-mentioned fact that the box 10 is usually made of plastic, it is easy to cause serious wear of the part of the box 10 corresponding to the drainage channel during frequent disassembly and assembly of the drainage plug 30.

[0044] Therefore, in order to reduce the damage of the disassembly of the drainage plug 30 to the box 10, the combined limiting sleeve 20 is arranged in the present technical solution to avoid the direct installation of the drainage plug 30 on the box 10. The disassembly and assembly of the drainage plug 30 in the combined limiting sleeve 20 realizes the effect of opening or closing the second drainage channel 21. Since the drainage plug 30 does not directly cooperate with the box 10, that is, the indirect cooperation between the two through the combined limiting sleeve 20 greatly reduces the influence of the disassembly and assembly of the drainage plug 30 on the box 10, thereby improving the service life of the box 10 and reducing the risk of damage to the structure of the box 10.

[0045] Further, since the combined limiting sleeve 20 is nested with the box 10, the stability of the installation of the combined limiting sleeve 20 on the first drainage channel 14 is improved by the limiting distance 24, and the movement of the combined limiting sleeve 20 relative to the box 10 is avoided. In addition, the sealing rubber piece 40 is arranged at the end of the drainage plug 30 to further improve the sealing performance of the second drainage channel 21. In combination with the actual use scene of the heat preservation box 100, the risk of leakage of accumulated water caused by the thawing of food materials placed in the box 10 is reduced.

[0046] In combination Figures 2-6 Preferably, the combined limiting sleeve 20 includes a first sleeve 22 and a second sleeve 23. The first sleeve 22 is arranged in the first drainage channel 14, and the first sleeve 22 is provided with a first stop portion 221 at the end away from the inner wall 12, and the first stop portion 221 abuts against the surface of the outer wall 11 away from the inner wall 12. The second sleeve 23 is screwed in the first sleeve 22, and the second sleeve 23 is provided with a second stop portion 231 at the end away from the outer wall 11, and the second stop portion 231 abuts against the surface of the outer wall 11 away from the inner wall 12. The second drainage channel 21 is formed by the second sleeve 23, and the limiting distance 24 is formed by the first stop portion 221 and the second stop portion 231. The limiting distance 24 is represented by d.

[0047] Specifically, the stop effect of the first stop portion 221 and the second stop portion 231 improves the stability of the combined limiting sleeve 20 installed on the cabinet 10, and reduces the risk of the combined limiting sleeve 20 accidentally falling out of the first drainage channel 14. In combination with the screwing cooperation between the first sleeve 22 and the second sleeve 23. In combination with the actual installation process, the first sleeve 22 can be installed in the first drainage channel 14 from the outer side 101 of the cabinet 10 to the inner side 102, until the first stop portion 221 abuts against the surface of the outer wall 11, and then the second sleeve 23 is installed in the first sleeve 22 from the inner side 102 to the outer side 101. Since the screwing depth of the first sleeve 22 and the second sleeve 23 is previously set, when the first sleeve 22 and the second sleeve 23 are screwed in place, the limiting distance 24 formed between the first stop portion 221 and the second stop portion 231 is adapted to the distance formed between the outer wall 11 and the inner wall 12, effectively avoiding the deformation of the outer wall 11 and the inner wall 12 caused by the extrusion of the first stop portion 221 and the second stop portion 231 due to the excessive screwing depth of the first sleeve 22 and the second sleeve 23.

[0048] Preferably, the drainage plug 30 is provided with a limiting clamping groove 32 at one end away from the adjusting portion 31; and the sealing rubber member 40 is clamped in the limiting clamping groove 32. For example, the sealing rubber member 40 has a ring structure, and thus the sealing rubber member 40 is clamped in the limiting clamping groove 32 by virtue of the elastic deformability of the sealing rubber member 40, so as to ensure that the sealing rubber member 40 moves together during the disassembly and assembly of the drainage plug 30.

[0049] Preferably, the sealing rubber member 40 includes a connecting portion 41 and a filling portion 42. The connecting portion 41 cooperates with the limiting clamping groove 32; the filling portion 42 is connected to one side of the connecting portion 41 close to the side wall 232 of the combined limiting sleeve 20; the filling portion 42 is provided with a guide inclined surface 421 close to one side of the side wall 232; and when the drainage plug 30 is arranged in the second drainage channel 21, the filling portion 42 is extruded between the connecting portion 41 and the side wall 232 to block the second drainage channel 21.

[0050] Specifically, the guide inclined surface 421 provided on the filling portion 42 makes one end of the sealing rubber member 40 have a smaller circumference than the pipe diameter of the second sleeve 23, i.e. smaller than the diameter of the second drainage channel 21, and the other end of the sealing rubber member 40 has a larger circumference than the diameter of the second drainage channel 21. Thus, in combination with the above structural features of the sealing rubber member 40, the installation efficiency of the drainage plug 30 installed in the second drainage channel 21 is improved, and the sealing effect of blocking the second drainage channel 21 is improved under the extrusion of the second sleeve 23 and the drainage plug 30 on the sealing rubber member 40.

[0051] Preferably, a deformation gap 43 is formed between the connecting portion 41 and the filling portion 42; when the filling portion 42 is pressed between the connecting portion 41 and the side wall 232, the deformation gap 43 is reduced.

[0052] Preferably, a second sealing ring 51 is arranged between the second stop portion 231 and the inner wall 12; and / or, a first sealing ring 52 is arranged between the first stop portion 221 and the adjusting portion 31. For example, the second sealing ring 51 is arranged between the second stop portion 231 and the inner wall 12, and the first sealing ring 52 is arranged between the first stop portion 221 and the adjusting portion 31 at the same time, which further improves the sealing performance of the second drainage passage 21.

[0053] Preferably, a surface of the outer wall 11 is provided with a sunken groove structure 111 for accommodating the first stop portion 221; wherein a surface of the first stop portion 221 is lower than or flush with an adjacent surface of the outer wall 11 forming the sunken groove structure 111. By arranging the sunken groove structure 111 on the surface of the outer wall 11, the first stop portion 221 is prevented from protruding from the surface of the outer wall 11, which affects the appearance of the insulation box 100 and increases the floor space of the insulation box 100.

[0054] Preferably, in one example, the side wall 232 of the second sleeve 23 is provided with an internal thread structure 233; and a surface of the drainage plug 30 is provided with an external thread structure 33 for screwing with the internal thread structure 233. Specifically, the stability of installing the drainage plug 30 into the second sleeve 23 is improved, and the risk of the drainage plug 30 accidentally detaching from the second sleeve 23 is reduced. Wherein, the drainage plug 30 is further provided with a cap structure 53 for covering the adjusting portion 31.

[0055] In another example different from the above example, the side wall 232 of the second sleeve 23 is a light hole structure; and the drainage plug 30 is sleeved in the light hole structure.

[0056] Preferably, the outer wall 11 comprises a support wall 112 and a wall body 113 which are integrally formed with each other; the support wall 112 is clamped between the inner wall 12 and the wall body 113, and the first drainage passage 14 is formed by surrounding the support wall 112; the wall body 113 is arranged opposite to the inner wall 12, and the insulation layer 13 is formed between the wall body 113 and the inner wall 12.

[0057] Preferably, the box body 10 comprises an inner chamber surrounded by the inner wall 12, and the first drainage passage 14 forms a first drainage opening in the side wall 232; a bottom surface of the inner chamber forms a sunken groove at a position corresponding to the first drainage opening. The drainage efficiency of the water accumulated in the inner chamber is further improved.

[0058] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0059] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single independent technical solution, but this does not mean that each embodiment only contains one independent technical solution. The specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An insulated box, characterized in that, include: The box (10) is provided with a heat insulation layer (13) located between the outer wall (11) and the inner wall (12), and is provided with a first drainage channel (14) connecting the outer wall (11) and the inner wall (12); A combined limiting sleeve (20) is installed in the first drainage channel (14) and is provided with a limiting distance (24) to accommodate the outer wall (11) and the inner wall (12); A drain plug (30) is movably disposed in the second drain channel (21) of the combined limiting sleeve (20), and one end of the drain plug (30) is provided with an adjustment part (31) exposed to the outside of the box body (10); A sealing rubber component (40) is disposed at the end of the drain plug (30) located within the second drain channel (21); When the adjustment part (31) is adjusted to dislodge the drain plug (30) from the combined limiting sleeve (20), the second drain channel (21) is opened; When the adjustment part (31) is adjusted so that the drain plug (30) enters the combined limiting sleeve (20), the second drain channel (21) is blocked by the sealing rubber part (40).

2. The insulated box according to claim 1, characterized in that, The combined limiting sleeve (20) includes: The first sleeve (22) is provided inside the first drainage channel (14), and the first sleeve (22) is provided with a first stop (221) at one end away from the inner wall (12), and the first stop (221) abuts against the surface of the outer wall (11) away from the inner wall (12). The second sleeve (23) is screwed into the first sleeve (22), and the second sleeve (23) has a second stop (231) at one end away from the outer wall (11), and the second stop (231) abuts against the surface of the inner wall (12) away from the outer wall (11). The second drainage channel (21) is formed by the second sleeve (23), and the limiting distance (24) is formed by the first stop (221) and the second stop (231).

3. The insulated box according to claim 2, characterized in that, The drain plug (30) has a limiting groove (32) at one end away from the adjusting part (31); The sealing rubber component (40) is engaged in the limiting groove (32).

4. The insulated box according to claim 3, characterized in that, The sealing rubber component (40) includes: Connecting part (41), which cooperates with the limiting slot (32); A filling part (42) is connected to the side of the connecting part (41) near the side wall (232) of the combined limiting sleeve (20); the filling part (42) near the side wall (232) is provided with a guide slope (421); When the drain plug (30) is driven into the second drain channel (21), the filling part (42) is squeezed between the connecting part (41) and the side wall (232) to block the second drain channel (21).

5. The insulated box according to claim 4, characterized in that, A deformation gap (43) is formed between the connecting part (41) and the filling part (42); When the filling portion (42) is squeezed between the connecting portion (41) and the side wall (232), the deformation gap (43) decreases.

6. The insulated box according to claim 2, characterized in that, A second sealing ring (51) is provided between the second stop (231) and the inner wall (12); And / or, a first sealing ring (52) is provided between the first stop (221) and the adjustment part (31).

7. The insulated box according to claim 2, characterized in that, The surface of the outer wall (11) is provided with a groove structure (111) for accommodating the first stop (221); The surface of the first stop (221) is lower than or flush with the outer wall (11) to form the adjacent surface of the sinkhole structure (111).

8. The insulated box according to any one of claims 2-7, characterized in that, The side wall (232) of the second sleeve (23) is provided with an internal thread structure (233); The surface of the drain plug (30) is provided with an external thread structure (33) that is screwed into the internal thread structure (233); or The sidewall (232) of the second sleeve (23) has a light hole structure; The drain plug (30) is fitted inside the aperture structure.

9. The insulated box according to any one of claims 1-7, characterized in that, The outer wall (11) includes a support wall (112) and a wall body (113) integrally formed with each other; The supporting wall (112) is sandwiched between the inner wall (12) and the wall body (113), and the first drainage channel (14) is formed by the supporting wall (112); The wall body (113) is disposed opposite to the inner wall (12), and the insulation layer (13) is formed between the wall body (113) and the inner wall (12).

10. The insulated box according to any one of claims 4-5, characterized in that, The housing (10) includes an inner cavity enclosed by the inner wall (12), and the first drainage channel (14) forms a first drainage outlet on the side wall (232); The bottom surface of the inner chamber forms a clearance groove at the position corresponding to the first drain outlet.

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