Box body structure and refrigeration equipment

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a box structure. The box structure comprises an inner container, a copper bar and a U-shaped shell. The opening part of the inner container is provided with an opening edge which is folded towards the outer side, and the opening edge is provided with an open groove; the copper bar comprises a contact edge and a protruding part, the protruding part is embedded in the open groove in a matched mode and penetrates through the open groove to protrude towards the other side, and the part, penetrating through the open groove, of the protruding part is provided with an interference plane. The U-shaped shell is provided with a U-shaped groove, and part of the side wall of the U-shaped groove is in parallel contact with the interference plane. The opening edge and the protruding part are clamped and fixed through the U-shaped groove, and due to the fact that the interference plane arranged on the protruding part makes parallel contact with the partial side wall of the U-shaped groove, the friction force between the protruding part and the U-shaped groove can be enhanced, the connection strength of the opening edge and the protruding part in the U-shaped groove is improved, the opening edge and the protruding part are not prone to displacement in the U-shaped groove, and the sealing performance of the opening edge and the protruding part is improved. Therefore, the flash gap distance between the inner container and the U-shaped shell is reduced, and meanwhile the protruding part is prevented from being disengaged from the U-shaped groove. The utility model further discloses refrigeration equipment.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, for example, to a box structure and refrigeration equipment. Background Art

[0002] At present, when the refrigeration equipment box is pre-assembled, in order to prevent the U shell and the inner liner from flashing after the box is foamed, it is generally processed by taping. However, the method of using tape for processing not only requires a lot of manpower and material resources, but also causes the production cost of the equipment to be too high.

[0003] In the related art, there is an assembly structure of an inner liner and a U-shell, in which a self-locking structure is formed by cooperation between the U-shell and the copper bar, thereby increasing the connection strength between the two and reducing the flash seam problem caused by the extrusion of the foaming material during the foaming process. However, when the extrusion pressure of the foaming material on the U-shell and the copper bar is too large, there is a risk of separation between the U-shell and the copper bar.

[0004] Therefore, it can be seen that how to reduce the gap distance between the U shell and the inner shell while preventing the U shell and the copper bar from being easily separated under external force has become an urgent problem to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The disclosed embodiments provide a box structure and a refrigeration device, which enhances the connection strength between the protrusion and the U-shaped groove by the interference contact between the interference plane on the protrusion and the side wall of the U-shaped groove, thereby reducing the gap distance between the inner tank and the U-shell, and preventing the edge and the protrusion from falling out of the U-shaped groove.

[0008] In some embodiments, the box structure includes: an inner liner, a copper bar and a U-shell; the mouth of the inner liner is provided with an edge folded outward, and a slot is provided on the edge; the copper bar includes a contact edge and a protrusion, the contact edge is attached to the edge of the inner liner, the protrusion is adapted to be embedded in the slot and protrude through the slot to the other side, wherein the part of the protrusion passing through the slot is provided with an interference plane; a U-shaped groove is provided on the U-shell, the edge of the inner liner and the copper bar are clamped in the U-shaped groove, and part of the side wall of the U-shaped groove is in parallel contact with the interference plane.

[0009] Optionally, the contact edge includes a first contact edge and a second contact edge; the first contact edge is arranged on one side of the raised portion and is attached to the rim on the side where the groove faces the inner liner; the second contact edge is arranged on the other side of the raised portion and is attached to the rim on the side where the groove faces the free edge of the rim.

[0010] Optionally, the other side surface of the first contact edge and / or the other side surface of the second contact edge is provided with an inclined surface relative to the rim, and part of the side wall of the U-shaped groove is attached parallel to the inclined surface, wherein the inclined surface takes the plane where the rim is located as the base surface, and the end of the free edge facing the rim is higher than the end of the inclined surface facing the inner liner.

[0011] Optionally, the inclined surface is arranged on the first contact edge.

[0012] Optionally, the interference plane has an inclination angle relative to the plane where the rim is located, and its inclination direction is opposite to the inclination direction of the inclined surface.

[0013] Optionally, the free edge of the protrusion facing the rim is an arc-shaped structure.

[0014] Optionally, the U shell includes: an upper clamp arm and a lower clamp arm; the upper clamp arm can be movably clamped on the contact edge of the copper bar; the lower clamp arm can be movably clamped on one end of the protrusion of the copper bar passing through the slot, and a U-shaped groove is defined between the upper clamp arm and the lower clamp arm; wherein the inclination directions of the upper clamp arm and the lower clamp arm are opposite, so that the U-shaped groove defined between the two has a small opening and a large interior.

[0015] Optionally, the upper clamping arm is a double-layer structure, wherein the outer layer is parallel to the plane where the mouth edge is located, and the inner layer has an inclined angle relative to the outer layer.

[0016] Optionally, an abutment surface perpendicular to the contact edge is provided at one end of the contact edge facing the inner container, wherein the abutment surface abuts against a portion of the side wall of the U-shaped groove.

[0017] In some embodiments, the refrigeration equipment includes: the box structure of any one of the above items.

[0018] The box structure and refrigeration equipment provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] The rim and the protrusion are clamped and fixed by the U-shaped groove. Since the interference plane on the protrusion is in parallel contact with the side wall of the U-shaped groove, the friction between the protrusion and the U-shaped groove can be enhanced, and the connection strength of the rim and the protrusion in the U-shaped groove is improved, so that the rim and the protrusion are not easily displaced in the U-shaped groove, thereby reducing the gap distance between the inner liner and the U shell, and also preventing the protrusion from falling out of the U-shaped groove.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0022] Figure 1 is a structural schematic diagram of a box structure provided by an embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of the structure of the inner gallbladder knot provided by an embodiment of the present disclosure;

[0024] Figure 3 is a schematic diagram of the structure of the connecting groove and the groove provided in the embodiment of the present disclosure;

[0025] Figure 4 is a schematic diagram of the structure of a copper bar provided in an embodiment of the present disclosure;

[0026] Figure 5 It is a schematic diagram of the connection between the inner liner, the copper bar and the U shell provided in the embodiment of the present disclosure;

[0027] Figure 6 It is a schematic diagram of the structure of the U-shaped groove provided in an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 100, liner; 110, rim; 111, slot; 200, copper strip; 210, contact edge; 211, first contact edge; 212, second contact edge; 213, free edge; 214, inclined surface; 220, raised portion; 221, interference plane; 222, accommodating groove; 230, abutting surface; 240, connecting groove; 241, recess; 242, protrusion; 300, U-shell; 310, U-shaped groove; 320, upper clamping arm; 321, outer layer; 322, inner layer; 330, lower clamping arm; 331, guide plate. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0038] Combination Figures 1 to 6As shown, the embodiment of the present disclosure provides a box structure, including: an inner liner 100, a copper bar 200 and a U-shell 300; the mouth of the inner liner 100 is provided with an edge 110 folded outward, and a groove 111 is provided on the edge 110; the copper bar 200 includes a contact edge 210 and a protrusion 220, the contact edge 210 is attached to the edge 110 of the inner liner 100, the protrusion 220 is adapted to be embedded in the groove 111 and protrudes to the other side through the groove 111, wherein the portion of the protrusion 220 passing through the groove 111 is provided with an interference plane 221; a U-shaped groove 310 is provided on the U-shell 300, the edge 110 of the inner liner 100 and the copper bar 200 are clamped in the U-shaped groove 310, and part of the side wall of the U-shaped groove 310 is in parallel contact with the interference plane 221.

[0039] By adopting the box structure provided by the embodiment of the present disclosure, the rim 110 and the protrusion 220 are clamped and fixed by the U-shaped groove 310. Since the interference plane 221 provided on the protrusion 220 is in parallel contact with part of the side wall of the U-shaped groove 310, the friction between the protrusion 220 and the U-shaped groove 310 can be enhanced, and the connection strength of the rim 110 and the protrusion 220 in the U-shaped groove 310 is improved, so that the rim 110 and the protrusion 220 are not easily displaced in the U-shaped groove 310, thereby reducing the gap distance between the inner liner 100 and the U shell 300, and also preventing the protrusion 220 from slipping out of the U-shaped groove 310.

[0040] Combination Figure 3 As shown, optionally, at least one connecting groove 240 is provided on the side of the copper strip 200 facing the inner liner 100. In this way, the foaming material can enter the inner space of the U-shaped groove 310 through the connecting groove 240, filling the gap between the inner space of the U-shaped groove 310 and the copper strip 200, so that the inner liner 100 and the copper strip 200 disposed in the U-shaped groove 310 are more firmly connected.

[0041] Combination Figure 3 As shown, optionally, a plurality of protrusions 242 are provided on the side of the first contact edge 211 facing the rim 110, and a groove body corresponding to the protrusion 242 is provided on the rim 110, wherein the groove body can be engaged with the protrusion 242. In this way, the engagement of the protrusion 242 with the groove body improves the connection strength between the copper strip 200 and the rim 110, making the connection between the copper strip 200 and the rim 110 more stable. At the same time, the protrusion 242 and the groove body also play a positioning role, and through the engagement of the protrusion 242 with the groove body, the copper strip 200 can be accurately installed at the appropriate position of the rim 110.

[0042] Optionally, a side of the contact edge facing away from the edge 110 is provided with a depression 241 corresponding to the protrusion 242. In this way, when the box is foamed and filled, the molded foam material can be limited by these depressions 241, thereby enhancing the connection strength of the protrusion 220 in the U-shaped groove 310 and reducing the flashing between the copper strip 200 and the U shell 300.

[0043] Combination Figures 4 to 5 As shown, optionally, the contact edge 210 includes a first contact edge 211 and a second contact edge 212; the first contact edge 211 is arranged on one side of the protrusion 220 and is attached to the rim 110, and is located on the side of the slot 111 facing the inner liner 100; the second contact edge 212 is arranged on the other side of the protrusion 220 and is attached to the rim 110, and is located on the side of the free edge 213 of the slot 111 facing the rim 110. In this way, by the first contact edge 211 and the second contact edge 212 arranged on both sides of the protrusion 220, support can be formed on both sides of the protrusion 220, the protrusion 220 is better connected to the rim 110 of the inner liner 100, so that the U shell 300 can better clamp and fix the copper bar 200 and the rim 110 of the inner liner 100, and maintain the stability of the connection between the protrusion 220 and the rim 110.

[0044] Combination Figures 4 to 5 As shown, optionally, the other side surface of the first contact edge 211 and / or the other side surface of the second contact edge 212 is provided with an inclined surface 214 relative to the rim 110, and part of the side wall of the U-shaped groove 310 is parallel to the inclined surface 214, wherein the inclined surface 214 takes the plane where the rim 110 is located as the base surface, and the end of the free edge 213 facing the rim 110 is higher than the end of the inclined surface 214 facing the inner liner 100. In this way, the inclined surface 214 on the first contact edge 211 or the second contact edge 212 can be in parallel contact with the corresponding side wall in the U-shaped groove 310, forming a limit on the displacement of the U-shaped groove 310 in the direction away from the inner liner 100, thereby improving the connection strength between the U-shaped groove 310 and the protrusion 220.

[0045] Combination Figures 4 to 5 As shown, optionally, the inclined surface 214 is provided on the first contact edge 211. In this way, the inclined surface 214 can also be provided on the first contact edge 211 and the second contact edge 212 at the same time. In this way, the first contact edge 211 and the second contact edge 212 are both provided with the same inclined surface 214, and both are in parallel contact with the corresponding side wall on the U-shaped groove 310. Compared with the inclined surface 214 provided solely on the first contact edge 211, the inclined surface 214 is provided on both the first contact edge 211 and the second contact edge 212, which increases the contact position with the side wall of the U-shaped groove 310, thereby enhancing the limiting effect on the U-shaped groove 310, and also improves the connection strength between the protrusion 220 and the U-shaped groove 310.

[0046] Combination Figures 4 to 5 As shown, optionally, the interference plane 221 has an inclination angle relative to the plane where the rim 110 is located, and its inclination direction is opposite to the inclination direction of the inclined surface 214. In this way, the inclination direction of the interference plane 221 is opposite to that of the inclined surface 214, so that when the U-shaped groove 310 is displaced, the side wall in parallel contact with the inclined surface 214 can slide along the inclination angle of the surface of the inclined surface 214, so that during the displacement of the U-shaped groove 310, the side wall corresponding to the inclined surface 214 is squeezed by the inclined surface 214 and moves in a direction away from the contact edge 210. At the same time, the side wall corresponding to the interference plane 221 moves toward the protrusion 220, so that the friction force of the interference contact between the interference plane 221 and the side wall opposite thereto gradually increases with the displacement distance of the U-shaped groove 310, thereby enhancing the connection strength between the protrusion 220 and the U-shaped groove 310 and effectively preventing the protrusion 220 from falling out of the U-shaped groove 310.

[0047] Combination Figures 4 to 5 As shown, optionally, the portion of the protrusion 220 facing the free edge 213 of the rim 110 is an arc-shaped structure. In this way, the arc-shaped structure of the protrusion 220 facing the free edge 213 plays a guiding role when the protrusion 220 is connected to the U-shaped groove 310. The protrusion 220 can be quickly connected to the U-shaped groove 310 under the guidance of the arc-shaped structure, which not only makes the installation work simpler and more convenient, but also improves the work efficiency.

[0048] Optionally, the connection between the protrusion 220 and the first contact edge 211 is a right-angle structure. In this way, when the protrusion 220 is embedded in the slot 111, the right-angle structure can limit the edge 110 of the slot 111, preventing the protrusion 220 from falling out of the slot 111 under the action of external force, thereby improving the connection strength between the protrusion 220 and the slot 111.

[0049] Optionally, a receiving groove 222 is provided on the side of the protrusion 220 facing away from the interference plane 221. In this way, the receiving groove 222 provided in the protrusion 220 can accommodate the foam filling material, and when the U-shaped groove 310 and the receiving groove 222 are filled with the foam filling material, the formed foam filling material can limit the protrusion 220, reduce the displacement amplitude of the protrusion 220 in the U-shaped groove 310, thereby enhancing the stability of the protrusion 220 in the U-shaped groove 310, and preventing the protrusion 220 from excessive displacement or falling out of the U-shaped groove 310 under the action of external force.

[0050] Combination Figures 5 and 6As shown, optionally, the U shell 300 includes: an upper clamp arm 320 and a lower clamp arm 330; the upper clamp arm 320 can be movably clamped on the contact edge 210 of the copper strip 200; the lower clamp arm 330 can be movably clamped on one end of the protrusion 220 of the copper strip 200 passing through the slot 111, and a U-shaped groove 310 is defined between the upper clamp arm 320 and the lower clamp arm 330; wherein the upper clamp arm 320 and the lower clamp arm 330 are inclined in opposite directions, so that the U-shaped groove 310 defined between the two has a small opening and a large interior. In this way, the smaller opening can limit the protrusion 220 set in the U-shaped groove 310, making it difficult for it to slip out of the mouth of the U-shaped groove 310, thereby improving the connection stability of the protrusion 220 and the U-shaped groove 310.

[0051] Combination Figure 6 As shown, optionally, the upper clamp arm 320 is a double-layer structure, wherein the outer layer 321 is parallel to the plane where the edge 110 is located, and the inner layer 322 has an inclined angle relative to the outer layer 321. In this way, the double-layer structure improves the overall strength of the upper clamp arm 320, so that the upper clamp arm 320 is not easily deformed during the process of clamping the edge 110 and the protrusion 220, and reduces the occurrence of the side wall of the outer layer 321 of the upper clamp arm 320 being warped when subjected to force, so that the side wall of the outer layer 321 remains parallel to the edge 110.

[0052] Optionally, the inclination angle of the inner layer 322 is the same as the inclination angle of the inclined surface 214. In this way, the inner layer 322 is in parallel contact with the inclined surface 214, and when displacement occurs between the protrusion 220 and the U-shaped groove 310, the inner layer 322 can slide smoothly along the inclined surface 214, so that the force between the inner layer 322 and the inclined surface 214 is balanced during the sliding process.

[0053] It can be understood that when displacement occurs between the protrusion 220 and the U-shaped groove 310, the inner layer 322 slides along the surface of the inclined surface 214, so that the upper clamping arm 320 is subjected to the squeezing force from the inclined surface 214, and the upper clamping arm 320 moves in the direction away from the contact edge 210. At the same time, the lower clamping arm 330 moves toward the protrusion 220, so that the friction force of the interference contact between the interference plane 221 and the inner side wall of the lower clamping arm 330 gradually increases with the movement of the U-shaped groove 310, thereby limiting the displacement between the protrusion 220 and the U-shaped groove 310, improving the connection strength between the protrusion 220 and the U-shaped groove 310, and preventing the protrusion 220 from slipping out of the U-shaped groove 310.

[0054] Optionally, the double-layer structure of the upper clamp arm 320 is an integrated structure. In this way, the integrated structure has integrity, can improve the strength of the structure, improve the upper force limit of the entire structure, and make the clamping of the upper clamp arm 320 to the edge 110 and the protrusion 220 more stable.

[0055] Optionally, a cavity is left between the outer layer 321 and the inner layer 322 of the upper clamp arm 320. In this way, when the upper clamp arm 320 is subjected to force, the cavity itself can be used for buffering, and the force is distributed to its surroundings, ensuring that the upper clamp arm 320 is not easily deformed or broken due to excessive force, so as to increase the service life of the overall structure.

[0056] Combination Figure 6 As shown, optionally, a guide plate 331 is provided at one end of the lower clamp arm 330, wherein the guide plate 331 and the lower clamp arm 330 have an inclined angle, and the inclined angle of the guide plate 331 is opposite to the inclined angle of the lower clamp arm 330. In this way, the guide plate 331 with an inclined angle opposite to that of the lower clamp arm 330 can guide the edge 110 and the protrusion 220 during installation. Compared with the installation method without a guide structure, the edge 110 and the protrusion 220 can easily dock with the opening of the U-shaped groove 310 and embed therein, which reduces the production difficulty and effectively improves the production efficiency.

[0057] Combination Figures 5 and 6 As shown, optionally, an end of the contact edge 210 facing the inner liner 100 is provided with an abutment surface 230 perpendicular to the contact edge 210, wherein the abutment surface 230 abuts against a portion of the side wall of the U-shaped groove 310. In this way, the vertically arranged abutment surface 230 can block and limit the upper clamping arm 320 of the U-shaped groove 310 after the inner liner 100 and the copper bar 200 are connected to the U-shaped groove 310, thereby preventing the inner liner 100 and the copper bar 200 from being over-embedded or under-embedded.

[0058] An embodiment of the present disclosure provides a refrigeration device including: a box structure according to any one of the above embodiments.

[0059] By using the refrigeration device provided by the embodiments of the present disclosure, the box structure of any one of the above embodiments is assembled in the refrigeration device for use, thereby improving the connection strength between the copper bar 200 and the U shell 300 in the box, so that after the edge 110 and the protrusion 220 are embedded in the U-shaped groove 310, it is not easy to fall out of the U-shaped groove 310, thereby improving the connection strength between the inner liner 100, the copper bar 200 and the U shell 300, and also reducing the flash gap between the copper bar 200 and the U shell 300.

[0060] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A box structure, characterized in that: include: The inner container (100) has an outer folded edge (110) at its mouth, and a groove (111) is provided on the edge (110); The copper strip (200) comprises a contact edge (210) and a raised portion (220), wherein the contact edge (210) is attached to the edge (110) of the inner container (100), and the raised portion (220) is adapted to be embedded in the slot (111) and protrudes through the slot (111) to the other side, wherein the portion of the raised portion (220) passing through the slot (111) is provided with an interference plane (221); The U-shell (300) is provided with a U-shaped groove (310), the edge (110) of the inner container (100) and the copper bar (200) are clamped in the U-shaped groove (310), and part of the side wall of the U-shaped groove (310) is in parallel contact with the interference plane (221).

2. The box structure according to claim 1, characterized in that: The contact edge (210) comprises: A first contact edge (211) is disposed on one side of the raised portion (220), is attached to the rim (110), and is located on a side of the slot (111) facing the inner container (100); The second contact edge (212) is arranged on the other side of the protruding portion (220) and is attached to the rim (110), and is located on the side of the free edge (213) of the slot (111) facing the rim (110).

3. The box structure according to claim 2, characterized in that: The other side surface of the first contact edge (211) and / or the other side surface of the second contact edge (212) is provided with an inclined surface (214) relative to the rim (110), and part of the side wall of the U-shaped groove (310) is parallel to and attached to the inclined surface (214), wherein the inclined surface (214) takes the plane where the rim (110) is located as a base surface, and an end of the free edge (213) facing the rim (110) is higher than an end of the inclined surface (214) facing the inner liner (100).

4. The box structure according to claim 3, characterized in that: The inclined surface (214) is arranged on the first contact edge (211).

5. The box structure according to claim 3, characterized in that: The interference plane (221) has an inclination angle relative to the plane where the rim (110) is located, and its inclination direction is opposite to the inclination direction of the inclined surface (214).

6. The box structure according to claim 1, characterized in that: The portion of the protrusion (220) facing the free edge (213) of the rim (110) is an arc-shaped structure.

7. The box structure according to any one of claims 1 to 6, characterized in that: The U shell (300) comprises: An upper clamping arm (320) is movable and clamped on the contact edge (210) of the copper bar (200); A lower clamping arm (330) is movable and clamped on one end of the protruding portion (220) of the copper bar (200) passing through the slot (111), and defines a U-shaped slot (310) between the lower clamping arm (330) and the upper clamping arm (320); The upper clamping arm (320) and the lower clamping arm (330) are inclined in opposite directions, so that the U-shaped groove (310) defined between the two has a small opening and a large interior.

8. The box structure according to claim 7, characterized in that: The upper clamping arm (320) is a double-layer structure, wherein the outer layer (321) is parallel to the plane where the mouth edge (110) is located, and the inner layer (322) has an inclined angle relative to the outer layer (321).

9. The box structure according to any one of claims 1 to 6, characterized in that: An abutment surface (230) perpendicular to the contact edge (210) is provided at one end of the contact edge (210) facing the inner container (100), wherein the abutment surface (230) abuts against a portion of the side wall of the U-shaped groove (310).

10. A refrigeration device, characterized in that: It comprises a box structure as described in any one of claims 1 to 9.

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