Refrigerated container door end and refrigerated container

Abstract

The utility model discloses a refrigerated container door end and a refrigerated container, the end part, close to a second door plate body, of a first door plate body extends along the vertical direction to form a first step part, and the end part, close to a first door body, of the second door plate body extends along the vertical direction to form a second step part; the first step part and the second step part are oppositely arranged, and a containing cavity is formed in the side close to the interior of the refrigerated container. The middle frame body is connected with the first door plate body through a connecting part, the middle frame body is arranged in the containing cavity in the vertical direction, one side of the middle frame body abuts against the first step part, a step gap is formed between the other side of the middle frame body and the second step part, and the middle seam sealing assembly is used for sealing the step gap; the end sealing assemblies are used for sealing between the middle frame body and the refrigerated container. Under the condition that a traditional container lock rod is omitted, the door end of the refrigerated container is closed, and sealing connection of the door end can still be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of containers, and in particular relates to a refrigerated container door end and a refrigerated container. Background Art

[0002] The door panels of standard refrigerated containers are generally composed of left and right door panels, locking rods, rubber strips and other accessories. Multiple locking rods are arranged at intervals along the width direction of the left and right door panels to lock the positions of the left and right door panels and the container body, and then press on the rubber strips to close the left and right door panels and seal the door ends.

[0003] However, due to the use conditions and space limitations, it is sometimes impossible to configure a locking rod. In this case, it is difficult to achieve sealing between the left and right door panels.

[0004] Therefore, it is a technical problem to be solved urgently to develop a refrigerated container door end and a refrigerated container, which can achieve a sealed connection of the door end when the refrigerated container door end is closed without using a traditional container locking rod, thereby ensuring the thermal insulation performance of the refrigerated container. Utility Model Content

[0005] The utility model aims to provide a refrigerated container door end and a refrigerated container, so as to solve the problems existing in the prior art that the refrigerated container door end is closed under the condition of eliminating the traditional container locking rod, and the sealing connection of the door end cannot be guaranteed.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, the utility model proposes a refrigerated container door end, which includes a first door panel unit, a second door panel unit and a center seam sealing connection unit; the first door panel unit includes a first door panel body; the second door panel unit includes a second door panel body, the end of the first door panel body close to the second door panel body extends in the vertical direction to form a first step portion, the end of the second door panel body close to the first door body extends in the vertical direction to form a second step portion, the first step portion and the second step portion are arranged opposite to each other and are close to the inside of the refrigerated container to form a receiving cavity; the center seam sealing connection unit includes a middle frame body, a connecting component, a middle seam sealing assembly and an end sealing assembly, the middle frame body is connected to the first door panel body through the connecting component, the middle frame body is arranged in the receiving cavity in the vertical direction, one side of the middle frame body is abutted against the first step portion, and a step gap is formed between the other side of the middle frame body and the second step portion, the middle seam sealing assembly is used for sealing the step gap, and the end sealing assembly is used for sealing between the middle frame body and the refrigerated container.

[0008] In some embodiments of the present application, the first door panel body includes a first inner lining plate, a first door frame and a first door panel that are interconnected, and the first inner lining plate, the first door frame and the first door panel are arranged to form the first door panel body; the first door panel unit body is a first convex structure; the second door panel body includes a second inner lining plate, a second door frame and a second door panel that are interconnected, and the second inner lining plate, the second door frame and the second door panel are arranged to form the second door panel body; the second door panel unit body is a second convex structure; the first convex structure and the second convex structure are respectively formed with a first step portion and a second step portion adjacent to each other; the middle frame body includes a middle inner lining plate and a middle door frame that are connected in sequence; a first plug-in slot is provided on one side of the middle door frame extending in a vertical direction, and a second plug-in slot is provided on the first door frame extending in a vertical direction, and both ends of the connecting component are respectively inserted into the first plug-in slot and the second plug-in slot.

[0009] In some embodiments of the present application, the middle door frame is L-shaped; an L-shaped gap is formed between the middle door frame and the second step portion, and the L-shaped gap includes a first gap and a second gap that are interconnected; the center seam sealing assembly includes a first sealing component and a second sealing component, the first sealing component is used to seal the first gap, and the second sealing component is used to seal the second gap.

[0010] In some embodiments of the present application, a third plug-in slot and a fourth plug-in slot are formed on the second door frame; the first sealing component is connected to the second door frame by plugging into the third plug-in slot; the first sealing component is pressed against one side wall of the middle door frame; the second sealing component is connected to the second door door by plugging into the fourth plug-in slot; the second sealing component is pressed against the other side wall of the middle door frame.

[0011] In some embodiments of the present application, the top and bottom ends of the middle inner lining plate are bent and surrounded by the middle door frame to form the middle frame body. The middle frame body and the first door panel body are surrounded to form a cavity. The cavity is filled with supporting components, and the supporting components are used to ensure the supporting strength of the middle frame body.

[0012] In some embodiments of the present application, the number of the end sealing assemblies is two; the two end sealing assemblies are used for sealing between the top end and the bottom end of the middle frame body and the refrigerated container.

[0013] In some embodiments of the present application, the end sealing assembly includes a pressure plate assembly and a third sealing assembly; the pressure plate assembly is connected to the end of the side wall of the first door panel unit close to the second door panel unit; the third sealing assembly is connected to the end of the middle frame body; when the first door panel unit drives the center seam sealing connection unit to be closed relative to the refrigerated container, the third sealing assembly is clamped between the refrigerated container and the pressure plate assembly.

[0014] In some embodiments of the present application, the pressure plate assembly includes a first pressure strip back plate and a fourth sealing component, and the first pressure strip back plate connects the fourth sealing component to the first door panel unit; the third sealing assembly includes a second pressure strip back plate and a third sealing component, and the second pressure strip back plate connects the third sealing component to the end of the middle frame body; when the first door panel unit drives the center seam sealing connection unit to be closed relative to the refrigerated container, the third sealing component abuts against the fourth sealing component.

[0015] In some embodiments of the present application, the first door panel unit also includes a first annular sealing ring and a second annular sealing ring; the second door panel unit also includes a third annular sealing ring and a fourth annular sealing ring; the first annular sealing ring is circumferentially arranged around the side surface of the first inner lining plate, and is used for sealing between the first inner lining plate and the refrigerated container; the second annular sealing ring is circumferentially arranged around the first door frame close to the inner side of the refrigerated container, and is used for sealing between the first door frame and the refrigerated container; the third annular sealing ring is circumferentially arranged around the side surface of the second inner lining plate, and is used for sealing between the second inner lining plate and the refrigerated container; the fourth annular sealing ring is circumferentially arranged around the second door frame close to the inner side of the refrigerated container, and is used for sealing between the second door door and the refrigerated container.

[0016] In another aspect, the utility model further provides a refrigerated container, comprising any one of the refrigerated container door ends described above.

[0017] Compared with the prior art, the advantages and positive effects of the utility model are:

[0018] By arranging a center seam sealing component between the first door panel unit and the second door panel unit, the sealing of the gap between the first door panel unit and the second door panel unit is achieved; by arranging end sealing components between the two ends of the middle frame body and the container, the sealing performance between the middle frame body and the container is ensured; by arranging a connecting component, the connection between the middle frame body and the first door panel unit is achieved, thereby ensuring that when the original locking rod is cancelled, the thermal insulation seal between the first door panel unit, the second door panel unit and the refrigerated container can still be guaranteed.

[0019] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a refrigerated container door end proposed by the utility model;

[0022] Figure 2 yes Figure 1 The local schematic diagram of the A in the middle;

[0023] Figure 3 It is a top view of an embodiment of a refrigerated container door end proposed by the utility model;

[0024] Figure 4 yes Figure 3 The local schematic diagram of point B in the middle;

[0025] Figure 5 It is a cross-sectional view of an embodiment of a refrigerated container door end proposed by the utility model;

[0026] Figure 6 yes Figure 5 The local schematic diagram of the C in the middle;

[0027] Figure 7 yes Figure 5 A cross-sectional view of the middle frame seam sealing connection unit;

[0028] Figure 8 yes Figure 5 The local schematic diagram of point D in the middle;

[0029] In the figure,

[0030] 100, first door panel unit;

[0031] 110, first door panel body;

[0032] 111, first step;

[0033] 112, first door frame;

[0034] 1121, second plug-in slot;

[0035] 1122, fourth plug-in slot;

[0036] 113, first door panel;

[0037] 114, first lining plate;

[0038] 120, a first annular sealing ring;

[0039] 130, a second annular sealing ring;

[0040] 200, second door panel unit;

[0041] 210, second door panel body;

[0042] 211, second step;

[0043] 212, second door frame;

[0044] 2121, third plug-in slot;

[0045] 2122, fourth plug-in slot;

[0046] 213, second door panel;

[0047] 214, second lining plate;

[0048] 220, a third annular sealing ring;

[0049] 230, fourth annular sealing ring;

[0050] 300, center seam sealing connection unit;

[0051] 310, middle frame body;

[0052] 311, middle lining plate;

[0053] 312, middle door frame;

[0054] 3121, first plug-in slot;

[0055] 3122, the third plug-in slot;

[0056] 320, connecting parts;

[0057] 331, a first sealing component;

[0058] 332, a second sealing member;

[0059] 340, end seal assembly;

[0060] 341, first layering back plate;

[0061] 342, fourth sealing member;

[0062] 343, second layering back plate;

[0063] 344, a third sealing member;

[0064] 350, step gap;

[0065] 351, L-gap;

[0066] 3511, first gap;

[0067] 3512, second gap. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0074] In some embodiments of the present application, a refrigerated container door end is provided, such as Figure 1 As shown, the door panel comprises a first door panel unit 100 , a second door panel unit 200 and a center seam sealing connection unit 300 .

[0075] The first door panel unit 100 and the second door panel unit 200 are sealed and connected to the container, and the center seam sealing connection unit 300 is used for sealing between the first door panel unit 100 and the second door panel unit 200.

[0076] In some embodiments of the present application, the first door panel unit 100 includes a first door panel body 110 , and the second door panel unit 200 includes a second door panel body 210 .

[0077] A first step portion 111 is formed on one side of the first door panel body 110 close to the second door panel body 210 and extending in the vertical direction.

[0078] A second step portion 211 is formed on one side of the second door panel body 210 close to the first door panel body 110 and extending in the vertical direction.

[0079] The first step portion 111 and the second step portion 211 are arranged opposite to each other, and a receiving cavity is formed on one side of the first step portion 111 and the second step portion 211 near the inside of the refrigerated container. The center seam sealing connection unit 300 is arranged in the receiving cavity for sealing connection between the first door panel unit 100 and the second door panel unit 200.

[0080] In some embodiments of the present application, the first door panel body 110 is a first convex structure. The first convex structure has a smaller width near the inner side of the container and a larger width away from the inner side of the container.

[0081] In some embodiments of the present application, the second door panel body 210 is a second convex structure. The second convex structure has a smaller width near the inside of the container and a larger width away from the container.

[0082] The first step portion 111 and the second step portion 211 are formed adjacent to the first convex structure and the second convex structure.

[0083] Therefore, a receiving cavity is formed between the first door panel body 110 and the second door panel body 210 on a side close to the inner side of the container.

[0084] like Figure 2 , Figure 3 As shown, the first door panel body 110 includes a first inner lining board 114, a first door frame 112 and a first door panel 113 which are connected to each other. The first inner lining board 114, the first door frame 112 and the first door panel 113 are surrounded to form the first door panel body 110.

[0085] The second door panel body 210 includes a second inner lining plate 214, a second door frame 212 and a second door panel 213 connected to each other. The second inner lining plate 214, the second door frame 212 and the second door panel 213 are arranged to form the second door panel body 210.

[0086] In some embodiments of the present application, the center seam sealing connection unit 300 includes a middle frame body 310 , a connecting component 320 , a center seam sealing assembly and an end sealing assembly 340 .

[0087] The center seam sealing connection unit 300 is disposed at the accommodation cavity.

[0088] The middle frame body 310 is connected to the first door panel body 110 via a connecting member 320 . One side of the middle frame body 310 abuts against the first step portion 111 .

[0089] A step gap 350 is formed between the other side of the middle frame body 310 , the connecting component 320 , the first door frame 112 and the second step portion 211 .

[0090] The center seam sealing assembly is used to seal the step gap 350 .

[0091] The end sealing assembly 340 is used for sealing between the refrigerated container and the middle frame body 310 .

[0092] The connecting component 320 is connected to the first door frame 112 along the vertical direction of the first door panel body 110 .

[0093] Specifically, the connecting component 320 is a bent plate-shaped component.

[0094] The middle frame body 310 includes a middle inner lining plate 311 and a middle door frame 312. The middle inner lining plate 311 is connected to the middle door frame 312.

[0095] A second insertion slot 1121 is vertically extended on the first door frame 112 . One end of the connecting component 320 is inserted into the second insertion slot 1121 .

[0096] A first inserting slot 3121 is vertically extended on the middle door frame 312 . The other end of the connecting component 320 is inserted into the first inserting slot 3121 .

[0097] One end of the middle inner lining plate 311 is connected to the first inner lining plate 114 by riveting or welding. The other end of the middle inner lining plate 311 is bent to form a right angle and connected to the first door frame 112. Specifically, a third plug-in slot 3122 is provided in the middle door frame 312 in the vertical direction. The other end of the middle inner lining plate 311 is inserted into the third plug-in slot 3122 to achieve the plug-in connection between the middle inner lining plate 311 and the middle door frame 312.

[0098] A fourth insertion slot 1122 is also provided on the first door frame 112. After the connection between the first inner lining plate 114 and the middle inner lining plate 311 is bent, it is inserted into the fourth insertion slot 1122 to achieve the connection between the first door 112 and the first inner lining plate 114.

[0099] like Figure 4 , Figure 5 As shown, the top and bottom ends of the middle inner lining plate 311 are bent to seal the top and bottom ends of the middle frame body 310 .

[0100] Thus, the bent portion of the first inner lining plate 114, the first door frame 112, the connecting component 320, the middle door frame 312 and the middle inner lining plate 311 are surrounded to form a cavity, the top and bottom ends of the middle inner lining plate 311 are bent to close the cavity formed by the surrounding, and the supporting component is filled in the cavity. The supporting component is connected to the middle frame body 310 by riveting or bonding. The supporting component is used to ensure the supporting strength of the middle frame body 310.

[0101] Specifically, the middle door frame 312 is L-shaped.

[0102] An L-shaped gap 351 is formed between the middle door frame 312 and the second stepped portion 211 . The L-shaped gap 351 is a part of the stepped gap 350 .

[0103] The L-shaped gap 351 includes a first gap 3511 and a second gap 3512 that are connected to each other.

[0104] The center seam sealing assembly includes a first sealing component 331 and a second sealing component 332. The first sealing component 331 is used to seal the first gap 3511. The second sealing component 332 is used to seal the second gap 3512.

[0105] A third inserting slot 2121 and a fourth inserting slot 2122 are formed on the second door frame 212 .

[0106] The first sealing member 331 is connected to the second door frame 212 by plugging into the third plugging groove 2121. The first sealing member 331 is pressed against a side wall of the middle door frame 312.

[0107] The second sealing member 332 is connected to the second door frame 212 by plugging into the fourth plugging groove 2122. The second sealing member 332 is pressed against the other side wall of the middle door frame 312.

[0108] In some embodiments of the present application, the number of the end sealing assemblies 340 is two, and the two end sealing assemblies 340 are respectively used for sealing between the top end and the bottom end of the middle frame body 310 and the refrigerated container.

[0109] The end seal assembly 340 includes a pressure plate assembly and a third seal assembly.

[0110] The pressing plate assembly is connected to an end portion of the first door panel unit 100 close to a side wall of the second door panel unit 200 .

[0111] The third sealing assembly is connected to the end of the middle frame body 310 .

[0112] When the first door panel unit 100 drives the center seam sealing connection unit 300 to close relative to the refrigerated container, the pressing plate assembly abuts against the third sealing assembly, and the third sealing assembly is clamped between the refrigerated container and the pressing plate assembly.

[0113] like Figure 7 As shown, in the process that the first door panel unit 100 drives the center seam sealing connection unit 300 to close relative to the refrigerated container, the third sealing assembly abuts against the refrigerated container, and the refrigerated container applies a thrust on the third sealing assembly. In order to limit the movement range of the third sealing assembly, a pressure plate assembly is provided, and the refrigerated container pushes the third sealing assembly until it abuts against the pressure plate assembly.

[0114] Specifically, the pressure plate assembly includes a first pressure strip back plate 341 and a fourth sealing component 342. The first pressure strip back plate 341 connects the fourth sealing component 342 to the first door panel unit 100.

[0115] Specifically, the third sealing assembly includes a second layer back plate 343 and a third sealing component 344. The second layer back plate 343 connects the third sealing component 344 to the end of the middle frame body 310.

[0116] When the first door panel unit 100 drives the center seam sealing connection unit 300 to close relative to the refrigerated container, the third sealing component 344 abuts against the fourth sealing component 342 .

[0117] In some embodiments of the present application, the center seam sealing connection unit 300 is used for sealing connection between the first door panel unit 100 and the second door panel unit 200. In order to ensure the sealing between the first door panel unit 100, the second door panel unit 200 and the container body, the first door panel unit 100 also includes a first annular sealing ring 120 and a second annular sealing ring 130. The first door panel unit 100 is a convex structure. The first door panel unit 100 is close to the inside of the container as the first inner lining plate 114, and the first door panel unit 100 is away from the inside of the container as the first door frame 112. The cross section of the first inner lining plate 114 is smaller than the cross section of the first door frame 112.

[0118] like Figure 6 , Figure 8 As shown, the first annular sealing ring 120 is arranged to extend around the circumference of the first inner lining plate 114. Specifically, the first annular sealing ring 120 is arranged to extend around the circumference of the side surface of the first inner lining plate 114 to ensure the seal between the first inner lining plate 114 and the refrigerated container.

[0119] The second annular sealing ring 130 is extended around the circumference of the first door frame 112. Specifically, the second annular sealing ring 130 is arranged around the circumference of the first door frame 112 close to the inner side of the refrigerated container for sealing between the first door frame 112 and the refrigerated container.

[0120] The second door panel unit 200 further includes a third annular sealing ring 220 and a fourth annular sealing ring 230. The second door panel unit 200 is a convex structure, the second door panel unit 200 close to the inside of the container is a second inner lining plate 214, and the second door panel unit 200 away from the inside of the container is a second door frame 212. The cross section of the second inner lining plate 214 is smaller than the cross section of the second door door 212.

[0121] The third annular sealing ring 220 is arranged to extend around the circumference of the second inner lining plate 214. Specifically, the third annular sealing ring 220 is arranged to extend around the circumference of the side surface of the second inner lining plate 214 to ensure the seal between the second inner lining plate 214 and the refrigerated container.

[0122] The fourth annular sealing ring 230 is disposed around the circumference of the second door frame 212 close to the inner side of the refrigerated container, and is used for sealing between the second door frame 212 and the refrigerated container.

[0123] In some embodiments of the present application, the first annular sealing ring 120 and the second annular sealing ring 130 are both located on the inner side of the first door body 110 and will not extend beyond the cross-section of the first door body 110. Therefore, a smaller gap can be ensured between the first door panel unit 100 and the second door panel unit 200 and the refrigerated container, and a locking device is provided between the first door panel unit 100 and the second door panel unit 200 or between the second door panel unit 200 and the refrigerated container to lock the position between the first door panel unit 100, the second door panel unit 200 and the refrigerated container, so that the first annular sealing ring 120, the second annular sealing ring 130, the third annular sealing ring 220, and the fourth annular sealing ring 230 are pressed against the refrigerated container, the center seam sealing assembly is used to seal the gap between the first door panel body 110 and the second door panel body 210, and the end sealing assembly 340 is used to seal between the two ends of the middle frame body 310 and the refrigerated container. Therefore, when the existing door lock is cancelled, the sealing between the container door end and the refrigerated container can still be ensured.

[0124] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0125] The above is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A refrigerated container door end, characterized in that: include: A first door panel unit, comprising a first door panel body; A second door panel unit, comprising a second door panel body, an end portion of the first door panel body close to the second door panel body extending in a vertical direction to form a first step portion, an end portion of the second door panel body close to the first door panel body extending in a vertical direction to form a second step portion, the first step portion and the second step portion being arranged opposite to each other and close to the inside of the refrigerated container to form a receiving cavity; A center seam sealing connection unit comprises a center frame body, a connecting component, a center seam sealing assembly and an end sealing assembly, wherein the center frame body is connected to the first door panel body through the connecting component, the center frame body is arranged in the accommodating cavity along the vertical direction, one side of the center frame body is abutted against the first step portion, and a step gap is formed between the other side of the center frame body and the second step portion, the center seam sealing assembly is used for sealing the step gap, and the end sealing assembly is used for sealing between the center frame body and the refrigerated container.

2. The refrigerated container door end according to claim 1, characterized in that: The first door panel body comprises a first inner lining board, a first door frame and a first door panel which are connected to each other. The first inner lining board, the first door frame and the first door panel are arranged to form the first door panel body. The first door panel unit body is a first convex structure. The second door panel body comprises a second inner lining panel, a second door frame and a second door panel which are connected to each other, and the second inner lining panel, the second door frame and the second door panel are surrounded to form the second door panel body; the second door panel unit body is a second convex structure; A first step portion and a second step portion are respectively formed adjacent to the first convex structure and the second convex structure; The middle frame body includes a middle inner lining plate and a middle door frame connected in sequence; a first plug-in slot is extended along the vertical direction on one side of the middle door frame, and a second plug-in slot is extended along the vertical direction on the first door frame, and both ends of the connecting component are respectively inserted into the first plug-in slot and the second plug-in slot.

3. The refrigerated container door end according to claim 2, characterized in that: The middle door frame is L-shaped; An L-shaped gap is formed between the middle door frame and the second step portion, and the L-shaped gap includes a first gap and a second gap that are interconnected; The center seam sealing assembly includes a first sealing component and a second sealing component. The first sealing component is used for sealing the first gap, and the second sealing component is used for sealing the second gap.

4. The refrigerated container door end according to claim 3, characterized in that: The second door frame is formed with a third plugging slot and a fourth plugging slot; The first sealing component is connected to the second door frame by plugging into the third plugging groove; the first sealing component is pressed against a side wall of the middle door frame; The second sealing component is connected to the second door frame by plugging into the fourth plugging groove; the second sealing component is pressed against the other side wall of the middle door frame.

5. The refrigerated container door end according to claim 2, characterized in that: The top and bottom ends of the middle inner lining plate are bent and surrounded by the middle door frame to form the middle frame body. The middle frame body and the first door panel body are surrounded to form a cavity. The cavity is filled with supporting components, and the supporting components are used to ensure the supporting strength of the middle frame body.

6. The refrigerated container door end according to claim 1, characterized in that: The number of the end sealing assemblies is two; the two end sealing assemblies are used for sealing between the top end and the bottom end of the middle frame body and the refrigerated container.

7. The refrigerated container door end according to claim 6, characterized in that: The end sealing assembly includes a pressure plate assembly and a third sealing assembly; The pressing plate assembly is connected to an end of the first door panel unit close to a side wall of the second door panel unit; The third sealing assembly is connected to the end of the middle frame body; When the first door panel unit drives the center seam sealing connection unit to be closed relative to the refrigerated container, the third sealing assembly is clamped between the refrigerated container and the pressure plate assembly.

8. The refrigerated container door end according to claim 7, characterized in that: The pressure plate assembly includes a first pressure strip back plate and a fourth sealing component, wherein the first pressure strip back plate connects the fourth sealing component to the first door panel unit; The third sealing assembly includes a second layer strip back plate and a third sealing component, and the second layer strip back plate connects the third sealing component to the end of the middle frame body; When the first door panel unit drives the center seam sealing connection unit to be closed relative to the refrigerated container, the third sealing component abuts against the fourth sealing component.

9. The refrigerated container door end according to claim 2, characterized in that: The first door panel unit also includes a first annular sealing ring and a second annular sealing ring; The second door panel unit further includes a third annular sealing ring and a fourth annular sealing ring; The first annular sealing ring is disposed around the circumference of the side surface of the first inner lining plate and is used for sealing between the first inner lining plate and the refrigerated container; The second annular sealing ring is disposed around the first door frame near the inner side of the refrigerated container and is used for sealing between the first door frame and the refrigerated container; The third annular sealing ring is arranged around the circumference of the side surface of the second inner lining plate, and is used for sealing between the second inner lining plate and the refrigerated container; The fourth annular sealing ring is disposed around the circumference of the second door frame close to the inner side of the refrigerated container, and is used for sealing between the second door frame and the refrigerated container.

10. A refrigerated container, characterized in that: The refrigerated container door end comprises the door end of any one of claims 1 to 9.

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