Broken bridge entrance door with heat preservation and insulation structure

Abstract

The utility model provides a broken bridge entrance door with a heat preservation and insulation structure, and is applied to the technical field of doors and windows. The heat insulation cavities are formed in the door frame and the door leaf, the third heat insulation cavity is formed in the door body, two isotherm lines are formed, heat conduction is effectively reduced, and the heat insulation performance of the door and window is improved. Specifically, the first heat insulation cavity and the second heat insulation cavity form two isotherms in the vertical direction, and the heat insulation cavity between the two isotherms reduces indoor and outdoor heat exchange; and a third heat insulation cavity is arranged, so that the heat insulation effect of the door body is further enhanced, and the broken bridge entrance door with the heat preservation and insulation structure is more excellent in heat preservation and insulation aspects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of doors and windows, and more particularly to a broken bridge entry door with a heat preservation and insulation structure. BACKGROUND

[0002] In building energy consumption, doors and windows, as an important part of building envelope structure, account for a considerable proportion of heat conduction loss. Therefore, improving the heat preservation and insulation performance of doors and windows is of great significance to reducing building energy consumption and reducing energy consumption. However, the heat preservation and insulation structure design of doors and windows in the prior art has many limitations, such as the thermal bridge effect of the metal frame, the insufficient performance of the heat insulation material, the aging of the sealing material, and the lack of systematic design. In order to solve these problems, the prior art usually sets a heat insulation strip between the door frames, sets a heat insulation strip between the door leaves, and if there are multiple door frames and window frames in the door and window structure, sets a heat insulation strip between the multiple door frames and window frames, and makes the heat insulation strips vertically arranged to form an isotherm structure. However, in the door and window in the prior art, the outer frame and the door frame are usually staggered, and only one isotherm can be formed, so there is still room for improvement in the heat insulation capacity. For example, the Chinese utility model patent with the publication number CN112681934A - a door and window vertical isotherm structure for door and window heat insulation, the heat preservation material of the door and window is only filled between the door frame and the window frame, and since the door frame and the window frame are arranged at intervals, only one isotherm can be formed, and the heat insulation performance is poor.

[0003] In view of the problem of insufficient heat preservation performance provided by the heat preservation and insulation structure in the aluminum alloy entry door in the prior art, the present application provides a broken bridge entry door with a heat preservation and insulation structure. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a broken bridge entry door with a heat preservation and insulation structure, which has the advantage of improving the heat preservation and insulation performance.

[0005] In the first aspect, a broken bridge entry door with a heat preservation and insulation structure includes at least a door frame, a door leaf connected to the door frame, and a door body connected to the door leaf, a first heat insulation cavity is arranged in the door frame, a second heat insulation cavity is arranged in the door leaf, the first heat insulation cavity and the second heat insulation cavity are on the same vertical line,

[0006] The two sides of the first heat insulation cavity and the second heat insulation cavity facing the outdoor are flush, forming a first isotherm, and the two sides of the first heat insulation cavity and the second heat insulation cavity facing the indoor are flush, forming a second isotherm.

[0007] The door body comprises a door body outer profile and a door body inner profile respectively arranged on both sides of the door leaf, and a third heat insulation cavity is arranged between the door body outer profile and the door body inner profile, and the third heat insulation cavity is on the first isotherm and the second isotherm.

[0008] The application provides a broken bridge entry door with a heat preservation and insulation structure, which is characterized in that a heat insulation cavity is arranged in a door frame and a door leaf, and a third heat insulation cavity is arranged in a door body, so that two isotherms are formed, heat conduction is effectively reduced, and the heat preservation and insulation performance of the door and window is improved.

[0009] Further, the first heat insulation cavity is provided with first heat insulation adhesive strips at intervals in the vertical direction.

[0010] The application provides a broken bridge entry door with a heat preservation and insulation structure, the first heat insulation cavity is provided with first heat insulation adhesive strips at intervals in the vertical direction, the number and distribution density of the first heat insulation adhesive strips are increased, and the heat insulation performance of the first heat insulation cavity in the vertical direction is improved.

[0011] Further, the first heat insulation adhesive strips are filled with first heat insulation materials.

[0012] The application provides a broken bridge entry door with a heat preservation and insulation structure, the first heat insulation adhesive strips are filled with first heat insulation materials, the number and distribution of the first heat insulation materials in the first heat insulation cavity are increased, and the heat insulation performance of the first heat insulation cavity is improved, so that the problem of insufficient filling of the heat insulation materials in the first heat insulation cavity is solved.

[0013] Further, the second heat insulation cavity is provided with second heat insulation adhesive strips at intervals in the vertical direction.

[0014] The application provides a broken bridge entry door with a heat preservation and insulation structure, the second heat insulation cavity is provided with second heat insulation adhesive strips at intervals in the vertical direction, and the heat insulation performance of the heat insulation cavity is improved. The number and distribution of the heat insulation adhesive strips are increased, the heat preservation effect of the heat insulation cavity is effectively improved, and the problem of insufficient heat preservation and insulation performance of the door and window in the prior art is solved.

[0015] Further, the second heat insulation adhesive strips are filled with second heat insulation materials.

[0016] Further, a first sealing structure is arranged between the first heat insulation cavity and the second heat insulation cavity, and the first sealing structure is used to seal the gap between the door frame and the door leaf.

[0017] Further, a third heat insulation material is arranged in the third heat insulation cavity.

[0018] Further, the width of the third heat insulation cavity in the horizontal direction is greater than the width of the first heat insulation cavity and the second heat insulation cavity in the horizontal direction.

[0019] Further, a lower rail is further included, the lower rail is connected with the door leaf, and a fourth heat insulation cavity is arranged on the same vertical line with the first heat insulation cavity, the second heat insulation cavity and the third heat insulation cavity.

[0020] Further, the fourth heat insulation cavity is flush with the first heat insulation cavity in the direction of the outdoor and indoor sides, so that the fourth heat insulation cavity is on the first isotherm and the second isotherm.

[0021] Beneficial effects: the application provides a broken bridge entry door with heat preservation and insulation structure, heat insulation cavities are arranged in the door frame and the door leaf, and a third heat insulation cavity is arranged in the door body, two isotherms are formed, heat conduction is effectively reduced, and the heat preservation and insulation performance of the door and window is improved. Specifically, the first heat insulation cavity and the second heat insulation cavity form two isotherms in the vertical direction, and the heat insulation cavity between the two isotherms reduces the heat exchange between the indoor and outdoor; the arrangement of the third heat insulation cavity further enhances the heat insulation effect of the door body, so that the broken bridge entry door with heat preservation and insulation structure performs more excellently in heat preservation and insulation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 A cross-sectional view of the broken bridge entry door with heat preservation and insulation structure provided by the application.

[0023] Fig. 2 A structure schematic view of the first heat insulation cavity and the second heat insulation cavity provided by the application.

[0024] Fig. 3 A structure schematic view of the lower rail provided by the application.

[0025] In the figure: 1, door frame; 2, door leaf; 3, door body; 11, first heat insulation cavity; 21, second heat insulation cavity; 31, third heat insulation cavity; 4, first isotherm; 5, second isotherm; 111, first heat insulation adhesive tape; 112, first heat insulation material; 211, second heat insulation adhesive tape; 212, second heat insulation material; 6, first sealing structure; 7, lower rail; 71, fourth heat insulation cavity. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and indicated in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] At present, there is a problem of insufficient thermal insulation performance in the existing aluminum alloy entry door with thermal insulation structure in the prior art. In order to solve this problem, the present application provides a broken bridge entry door with thermal insulation structure.

[0029] Please refer to Figs. 1 to 3 , the first aspect, a broken bridge entry door with thermal insulation structure, at least comprising a door frame 1, a door leaf 2 connected with the door frame 1 and a door body 3 connected with the door leaf 2, a first heat insulation cavity 11 is arranged in the door frame 1, a second heat insulation cavity 21 is arranged in the door leaf 2, the first heat insulation cavity 11 and the second heat insulation cavity 21 are on the same vertical line,

[0030] The two sides of the first heat insulation cavity 11 and the second heat insulation cavity 21 facing the outdoor are flush, forming a first isotherm 4, the two sides of the first heat insulation cavity 11 and the second heat insulation cavity 21 facing the indoor are flush, forming a second isotherm 5.

[0031] The door body 3 comprises a door body outer profile and a door body inner profile arranged on both sides of the door leaf 2 respectively, a third heat insulation cavity 31 is arranged between the door body outer profile and the door body inner profile, and the third heat insulation cavity 31 is on the first isotherm 4 and the second isotherm 5.

[0032] The first and second thermal insulation cavities 11 and 21 can be achieved by setting cavities inside the door frame 1 and the door leaf 2, which can be filled with thermal insulation materials such as polyurethane foam or glass fiber to enhance the thermal insulation effect. Further, the first and second thermal insulation cavities 11 and 21 in the vertical direction can ensure that the heat exchange between the indoor and outdoor is minimized. The third thermal insulation cavity 31 can be achieved by setting thermal insulation strips or plates between the door body outer profile and the door body inner profile, which can be filled with the same thermal insulation materials to further enhance the thermal insulation performance of the door body 3.

[0033] As a preferred embodiment, the first and second thermal insulation cavities 11 and 21 can form a continuous thermal insulation layer inside the door frame 1 and the door leaf 2, making it difficult for heat to conduct through these parts. The setting of the third thermal insulation cavity 31 can make the door body 3 have better thermal insulation effect while maintaining structural strength. Specifically, by setting multiple thermal insulation cavities in the door frame 1, the door leaf 2 and the door body 3, two isotherms are formed, and the thermal insulation material between the two isotherms effectively reduces the conduction of heat, improving the thermal insulation performance of the door and window.

[0034] Therefore, the present application solves the problem of insufficient thermal insulation performance of doors and windows in the prior art by setting thermal insulation cavities in the door frame 1 and the door leaf 2, and setting a third thermal insulation cavity 31 in the door body 3, forming multiple isotherms. Compared with the prior art, the technical scheme of the present application performs more outstandingly in thermal insulation, can effectively reduce the heat exchange between indoor and outdoor, and improve the thermal insulation performance of the door and window.

[0035] Further, the first thermal insulation cavity 11 is spaced apart in the vertical direction by a first thermal insulation adhesive strip 111.

[0036] Specifically, the first thermal insulation adhesive strip 111 can be made of various materials, such as polyurethane, silicone or rubber, etc., which have good thermal insulation performance and durability. The first thermal insulation adhesive strip 111 can be fixed at each vertical interval of the first thermal insulation cavity 11, or installed by embedding, to ensure its continuity and stability in the vertical direction. In addition, the thickness of the first thermal insulation adhesive strip 111 can be adjusted according to actual needs to achieve the best thermal insulation effect. As a preferred embodiment, the surface of the first thermal insulation adhesive strip 111 can be coated with a layer of reflective material to further reduce heat conduction.

[0037] Thus, by arranging the first heat insulation glue strips 111 in the first heat insulation cavity 11 in the vertical direction, the application effectively solves the problem of insufficient heat insulation performance of the first heat insulation cavity 11 in the vertical direction. This design significantly improves the heat insulation performance of the first heat insulation cavity 11 in the vertical direction by increasing the number and distribution density of the heat insulation glue strips. Specifically, the arrangement of the first heat insulation glue strips 111 reduces the vertical conduction of heat and enhances the overall heat preservation and insulation effect. Compared with the prior art, the technical solution of the application not only improves the heat insulation performance, but also ensures the stability and durability of the structure through reasonable design and material selection.

[0038] Further, the first heat insulation glue strips 111 are filled with the first heat insulation material 112.

[0039] Specifically, the first heat insulation material 112 can take various forms, for example, it can be a high molecular polymer material such as polyurethane foam, which has good heat insulation performance and filling performance and can effectively fill the gaps between the first heat insulation glue strips 111. In addition, inorganic heat insulation materials such as mineral wool or glass wool can also be used, which have high thermal resistance and good fire resistance and can further improve the heat insulation effect of the first heat insulation cavity 11. As a preferred embodiment, the first heat insulation material 112 can also be a composite material composed of multiple heat insulation materials to achieve the best heat insulation effect.

[0040] Thus, by increasing the filling amount of heat insulation material in the first heat insulation cavity 11, the heat insulation performance of the first heat insulation cavity 11 is improved, thereby solving the problem of insufficient filling of heat insulation material in the first heat insulation cavity 11. Specifically, the first heat insulation glue strips 111 are filled with the first heat insulation material 112, which effectively reduces heat conduction by increasing the filling amount of heat insulation material and improves the heat insulation performance of the first heat insulation cavity 11. Compared with the prior art, the technical solution of the application not only increases the filling amount of heat insulation material, but also further improves the heat insulation effect by selecting appropriate heat insulation materials, thereby effectively solving the problem of insufficient filling of heat insulation material in the first heat insulation cavity 11.

[0041] Further, the second heat insulation cavity 21 is arranged with second heat insulation glue strips 211 in the vertical direction.

[0042] Specifically, the second heat insulation glue strips 211 can be made of various materials such as polyurethane, silicone or rubber, which have good heat insulation performance. The second heat insulation glue strips 211 can be arranged uniformly on the inner wall of the second heat insulation cavity 21 or non-uniformly according to actual needs. In addition, the space between the second heat insulation glue strips 211 can be filled with a second heat insulation material 212 such as foamed plastic or glass fiber to further enhance the heat insulation effect.

[0043] Thus, the second thermal insulation cavity 21 increases the thermal insulation performance of the thermal insulation cavity by arranging the second thermal insulation adhesive strips 211 in a vertical direction. This design effectively improves the thermal insulation effect of the thermal insulation cavity by increasing the number and distribution of thermal insulation adhesive strips, thereby solving the problem of insufficient thermal insulation performance of doors and windows in the prior art. Compared with the prior art, the advantages of the present application lie in that the number and distribution of thermal insulation adhesive strips are increased, and the thermal insulation material is filled, thereby significantly improving the thermal insulation performance of doors and windows, reducing heat conduction loss, and improving the overall thermal insulation effect of the structure.

[0044] Further, the second thermal insulation adhesive strips 211 are filled with a second thermal insulation material 212.

[0045] Specifically, the second thermal insulation adhesive strips 211 can be made of various materials, such as polyurethane, silicone, or other materials with good thermal insulation performance. These adhesive strips can be fixed on the inner wall of the second thermal insulation cavity 21 to form a vertical spacing structure. Various thermal insulation materials, such as foamed plastic, glass fiber, or aerogel, can be filled between the adhesive strips. These materials have low thermal conductivity and can effectively reduce heat conduction.

[0046] As a preferred embodiment, the second thermal insulation adhesive strips 211 can be designed as detachable modules for easy installation and maintenance. In addition, the filling material between the adhesive strips can be adjusted according to actual needs to adapt to different thermal insulation requirements.

[0047] Thus, the second thermal insulation cavity 21 increases the thermal insulation performance of the thermal insulation cavity by arranging the second thermal insulation adhesive strips 211 and filling the second thermal insulation material 212 between the adhesive strips. This design increases the filling of thermal insulation materials and reduces heat conduction, thereby improving the thermal insulation effect of the entire door leaf 2. Compared with the prior art, the scheme of the present application not only improves the thermal insulation performance, but also enhances the flexibility and maintainability of the structure.

[0048] Further, a first sealing structure 6 is arranged between the first thermal insulation cavity 11 and the second thermal insulation cavity 21, and the first sealing structure 6 is used to seal the gap between the door frame 1 and the door leaf 2.

[0049] Specifically, the first sealing structure 6 can be implemented in various forms to achieve the sealing function. For example, a sealing strip made of elastic material can be embedded at the joint of the first thermal insulation cavity 11 and the second thermal insulation cavity 21, and the sealing effect can be achieved by the elastic deformation of the material to fill the gap. As a preferred embodiment, the sealing strip can be made of materials such as silicone or rubber, which have good weather resistance and aging resistance and can maintain the sealing effect for a long time.

[0050] Therefore, by arranging the first sealing structure 6 between the first heat insulation cavity 11 and the second heat insulation cavity 21, the application effectively solves the problem of poor sealing between the door frame 1 and the door leaf 2. Specifically, the first sealing structure 6 fills the gap between the door frame 1 and the door leaf 2, preventing heat conduction and loss, thereby improving the heat preservation and insulation performance of the door. Compared with the prior art, the sealing structure design of the application is more systematic and perfect, not only solving the sealing problem existing in traditional doors and windows, but also further improving the overall heat preservation effect.

[0051] Further, the third heat insulation cavity 31 is provided with a third heat insulation material.

[0052] Specifically, the third heat insulation material can be implemented by various materials, such as polyurethane foam, glass fiber, rock wool, etc. These materials have good heat insulation performance and can effectively reduce heat conduction. In addition, the third heat insulation material can be implemented by different filling methods, such as overall filling, layered filling or local filling, etc. As a preferred embodiment, the third heat insulation material can be filled in the whole third heat insulation cavity 31 to ensure the best heat insulation effect.

[0053] Therefore, the third heat insulation cavity 31 is provided with a third heat insulation material, which enhances the heat preservation and insulation performance of the door body 3 by arranging heat insulation material between the outer profile and the inner profile of the door body 3. The presence of the third heat insulation material effectively reduces heat conduction, thereby improving the heat preservation effect of the entire door system. This design solves the problem of insufficient heat preservation performance provided by the heat preservation and insulation structure of the broken bridge entrance door by increasing the arrangement of heat insulation material. Compared with the prior art, the application significantly improves the heat preservation and insulation performance of the door body 3 by arranging the third heat insulation cavity 31 and filling the third heat insulation material in the door body 3, thereby reducing heat loss and reducing building energy consumption.

[0054] Further, the width dimension of the third heat insulation cavity 31 in the horizontal direction is greater than the width dimension of the first heat insulation cavity 11 and the second heat insulation cavity 21 in the horizontal direction.

[0055] Specifically, the width dimension of the third heat insulation cavity 31 is greater than the width dimension of the first heat insulation cavity 11 and the second heat insulation cavity 21, which increases the volume of the heat insulation cavity, thereby increasing the filling amount of the heat insulation material and enhancing the heat preservation and insulation performance of the door body 3. By increasing the width of the heat insulation cavity, heat conduction can be more effectively reduced, the heat insulation effect of the entire door body 3 is improved, and the problem of insufficient heat preservation and insulation performance of the aluminum alloy entrance door in the prior art is solved.

[0056] As a preferred embodiment, the third thermal insulation cavity 31 can be realized by arranging thermal insulation materials between the door body outer profile and the door body inner profile. For example, high-density polyurethane foam or other high-efficiency thermal insulation materials can be filled between the door body outer profile and the door body inner profile to ensure that the width dimension of the third thermal insulation cavity 31 in the horizontal direction is greater than the width dimensions of the first thermal insulation cavity 11 and the second thermal insulation cavity 21.

[0057] Therefore, by increasing the width of the third thermal insulation cavity 31, the heat preservation and insulation performance of the door body 3 can be significantly improved. Specifically, increasing the width of the thermal insulation cavity can increase the filling amount of the thermal insulation material, thereby reducing heat conduction and improving the overall heat insulation effect of the door body 3. Compared with the prior art, this design of the present application can more effectively solve the problem of insufficient heat preservation and insulation performance of the aluminum alloy entry door, and has significant technical advantages.

[0058] Further, a lower rail 7 is also included, which is connected with the door leaf 2 and has a fourth thermal insulation cavity 71 that is on the same vertical line as the first thermal insulation cavity 11, the second thermal insulation cavity 21, and the third thermal insulation cavity 31.

[0059] Specifically, the arrangement of the lower rail 7 increases the number of thermal insulation cavities of the door, so that the fourth thermal insulation cavity 71 is on the same vertical line as the existing first thermal insulation cavity 11, the second thermal insulation cavity 21, and the third thermal insulation cavity 31, thereby enhancing the overall heat insulation performance of the door. This design effectively reduces heat conduction and improves the heat preservation and insulation effect of the door by increasing the number of thermal insulation cavities and arranging them on the same vertical line.

[0060] As a preferred embodiment, the lower rail 7 can be made of the same material as the door leaf 2 to ensure that it is firmly connected with the door leaf 2 and has good sealing performance. Further, the fourth thermal insulation cavity of the lower rail 7 can be filled with high-performance thermal insulation materials such as polyurethane foam or glass fiber to further improve the heat insulation effect. In addition, the design of the lower rail 7 can also consider the sealing performance of the part in contact with the ground to prevent heat conduction through the ground.

[0061] Therefore, by arranging the fourth thermal insulation cavity in the lower rail 7 and arranging it on the same vertical line as the existing thermal insulation cavities, the broken bridge entry door of the present application can significantly improve its heat preservation and insulation performance. This design not only solves the problem of insufficient heat preservation and insulation performance of the aluminum alloy entry door in the prior art, but also further improves the overall heat insulation effect of the door by increasing the number of thermal insulation cavities and optimizing the use of thermal insulation materials.

[0062] Further, the sides of the fourth thermal insulation cavity facing the outdoor and indoor directions are flush with the first isothermal line 4 and the second isothermal line 5, respectively, so that the fourth thermal insulation cavity is on the first isothermal line 4 and the second isothermal line 5.

[0063] Specifically, please refer toFig. 3 The lower rail 7 can be made of various materials such as aluminum alloy, stainless steel or high-strength plastic to ensure its structural strength and durability. The fourth thermal insulation cavity can achieve its thermal insulation function by injecting thermal insulation materials such as polyurethane foam or glass fiber during manufacturing. In addition, the design of the fourth thermal insulation cavity can include multiple thermal insulation layers, each layer filled with different thermal insulation materials to further improve the thermal insulation effect. As a preferred embodiment, the size and shape of the fourth thermal insulation cavity can be adjusted according to the actual application requirements to adapt to different door body 3 structures and installation environments.

[0064] Thus, by adding an additional thermal insulation cavity and ensuring its position on the isotherm, the present application effectively solves the problem of insufficient thermal insulation performance of aluminum alloy entry doors in the prior art. This design not only improves the thermal insulation performance of the door body 3, but also enhances the overall structural strength and stability of the door body 3.

[0065] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A broken bridge entrance door with heat preservation and insulation structure, comprising at least a door frame (1), a door leaf (2) connected with the door frame (1), and a door body (3) connected with the door leaf (2), a first heat insulation cavity (11) is arranged in the door frame (1), a second heat insulation cavity (21) is arranged in the door leaf (2), and the first heat insulation cavity (11) and the second heat insulation cavity (21) are on the same vertical line, characterized in that, two sides of the first heat insulation cavity (11) and the second heat insulation cavity (21) towards the outside are flush, forming a first isotherm (4), and two sides of the first heat insulation cavity (11) and the second heat insulation cavity (21) towards the inside are flush, forming a second isotherm (5); the door body (3) comprises a door body outer profile and a door body inner profile arranged on both sides of the door leaf (2) respectively, a third heat insulation cavity (31) is arranged between the door body outer profile and the door body inner profile, and the third heat insulation cavity (31) is on the first isotherm (4) and the second isotherm (5). The first heat insulation cavity (11) is provided with first heat insulation adhesive strips (111) in a vertical direction. The first heat insulation adhesive strips (111) are filled with a first heat insulation material (112).

2. The door according to claim 1, wherein the door has a thermal insulation structure. The second heat insulation cavity (21) is provided with second heat insulation adhesive strips (211) in a vertical direction.

3. The door according to claim 2, wherein the door has a thermal insulation structure. The second heat insulation adhesive strips (211) are filled with a second heat insulation material (212).

4. The door according to claim 1, wherein the door has a thermal insulation structure. A first sealing structure (6) is arranged between the first heat insulation cavity (11) and the second heat insulation cavity (21), and the first sealing structure (6) is used for sealing the gap between the door frame (1) and the door leaf (2).

5. The door according to claim 4, wherein the door has a thermal insulation structure. The third heat insulation cavity (31) is provided with a third heat insulation material.

6. The door according to claim 1, wherein the door has a thermal insulation structure. The width of the third heat insulation cavity (31) in the horizontal direction is greater than the width of the first heat insulation cavity (11) and the second heat insulation cavity (21) in the horizontal direction.

7. The door according to claim 1, wherein the door has a thermal insulation structure. A lower rail (7) is further included, the lower rail (7) is connected with the door leaf (2) and has a fourth heat insulation cavity (71), and the fourth heat insulation cavity (71) is on the same vertical line with the first heat insulation cavity (11), the second heat insulation cavity (21), and the third heat insulation cavity (31).

8. The door according to claim 7, wherein the door has a thermal insulation structure. The fourth heat insulation cavity is flush with the first heat insulation cavity in the direction of the outside and the inside, so that the fourth heat insulation cavity is on the first isotherm (4) and the second isotherm (5).

9. The door according to claim 1, wherein the door has a thermal insulation structure. ​ 10. The door according to claim 9, wherein the door has a thermal insulation structure. ​

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