Door body frame assembly, cabinet door assembly and refrigerator

Abstract

The application discloses a door frame assembly, a cabinet door assembly and a refrigerator. The door frame assembly comprises a plurality of frame bodies, each of which comprises a frame body main body and a foamed porous filler. The frame body main body comprises a plurality of plate bodies connected with each other, and the plurality of plate bodies define a cavity. The foamed porous filler is filled in the cavity. Each plate body comprises at least one layer of fiber resin composite material and at least one layer of fiber reinforced layer. The fiber resin composite material and the fiber reinforced layer are stacked along the thickness direction of the plate body. The thickness of the plate body is in the range of 1.5 mm to 3 mm. In at least one of the plurality of frame bodies, the frame body main body comprises a holding part formed by a part of the plate body. The door frame assembly has good deformation resistance and heat preservation performance.

Description

Technical Field

[0001] This application relates to the field of freezers, and more particularly to door frame assemblies, door assemblies, and freezers that can be used in freezers. Background Technology

[0002] A freezer typically includes a cabinet and door assemblies mounted on the cabinet. The cabinet has a storage space for storing items, food, etc. The freezer also typically includes a temperature control device to maintain the temperature of the storage space within a preset range. Therefore, good heat preservation performance is desirable for freezers.

[0003] Large freezers are widely used in shopping malls, supermarkets, restaurants, medical facilities, and other settings. Improving the insulation performance of large freezers is one of the issues that needs to be addressed. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides a door frame assembly, a cabinet door assembly, and a freezer. The door frame assembly of this application has good resistance to deformation and thermal insulation performance, thereby improving the thermal insulation performance of the freezer using the door frame assembly.

[0005] This application is achieved through the following technical solution.

[0006] The first aspect of this application provides a door frame assembly for a freezer. The door frame assembly includes multiple frames, each frame including a frame body and a porous material. The frame body includes multiple connected plates defining cavities. Foamed porous filler fills the cavities. Each plate includes at least one layer of fiber resin composite material and at least one layer of fiber reinforcement. The fiber resin composite material layer and the fiber reinforcement layer are stacked along the thickness direction of the plate. The thickness of the plate is in the range of 1.5 mm to 3 mm. In at least one of the multiple frames, the frame body includes a grip portion formed by a portion of the plate.

[0007] Because the main frame is constructed from layers of fiber-reinforced resin composite material and fiber reinforcement, with a thickness ranging from 1.5 mm to 3 mm, it possesses excellent tensile and bending strength. Even with a long frame, it is not prone to deformation, reducing the likelihood of poor sealing due to frame deformation, thus improving the freezer's insulation performance. Furthermore, the interconnected cavities formed by multiple panels, filled with foamed porous filler, enhance the frame's thermal insulation properties, further improving the freezer's overall insulation. Moreover, the combination of the door frame and intermediate frames increases the structural strength and rigidity of the door frame, further enhancing its shape retention. Even with a large lateral span, the use of an appropriate number of intermediate frames can reduce localized deflection due to gravity, further improving the freezer's insulation performance. Furthermore, since the grip is also formed through the plate, there is no need to install a separate handle, which reduces the risk of affecting the thermal insulation performance due to poor heat insulation of the handle mounting part. In addition, the handle installation process is omitted. Furthermore, since the plate has sufficient strength and rigidity, it can meet the requirement that the grip is not easily bent or deformed, and it can have sufficient fatigue strength.

[0008] In some embodiments of this application, a plurality of plates form a shell structure with a closed annular cross-section. The plurality of plates include a first plate, the first plate including a first plate segment and a second plate segment, the second plate segment being connected to the first plate segment and serving as part of the shell structure, the first plate segment extending from the shell structure, the first plate segment forming a door mounting portion with the shell structure, at least the first plate segment being formed as a flat plate, and the length of the first plate segment extending relative to the shell structure being in the range of 3 mm to 6 mm.

[0009] In some embodiments of this application, the second plate segment is formed as a flat plate or an arc-shaped plate.

[0010] In some embodiments of this application, the gripping part includes a gripping plate segment and a connecting plate segment, the connecting plate segment being connected between the gripping plate segment and the shell structure, and a gap existing between the gripping plate segment and the shell structure.

[0011] In some embodiments of this application, the holding plate segment is configured as a flat plate, and along the thickness direction of the first plate segment, the holding plate segment is located on the side of the first plate segment away from the shell structure, and there is a gap between the first plate segment and the holding plate segment.

[0012] In some embodiments of this application, the holding plate segment is configured as a hollow tube, and along the thickness direction of the first plate segment, the holding plate segment is located on the side of the first plate segment away from the tube shell structure, and there is a gap between the first plate segment and the holding plate segment.

[0013] In some embodiments of this application, the frame body further includes a first connecting portion and a second connecting portion, which are respectively connected to the shell structure. Along the thickness direction of the first plate segment, the first connecting portion and the second connecting portion are located on the side of the shell structure opposite to the first plate. The door frame assembly further includes a fixing member, which includes a first part and a second part connected together. The first part is engaged with the first connecting portion and the second connecting portion. Along the thickness direction of the first plate segment, the second part is opposite to the first plate segment to form a door clamping structure.

[0014] In some embodiments of this application, the first connecting portion is provided with a first snap-fit ​​portion, the second connecting portion is provided with a second snap-fit ​​portion, and the first part includes a first snap-fit ​​mating portion and a second snap-fit ​​mating portion. Both the first snap-fit ​​mating portion and the second snap-fit ​​mating portion are formed to include a connected recess and a protrusion. The recess of the first snap-fit ​​mating portion mates with the first snap-fit ​​portion, and the recess of the second snap-fit ​​mating portion mates with the second snap-fit ​​portion. The protrusions of the first snap-fit ​​mating portion and the protrusions of the second snap-fit ​​mating portion are respectively engaged on the side of the first snap-fit ​​portion and the second snap-fit ​​portion that are close to the shell structure.

[0015] In some embodiments of this application, at least one of the first connecting portion and the second connecting portion is provided with a heating element receiving portion, which is located between the fixing member and the shell structure.

[0016] In some embodiments of this application, the second portion is formed to be bent toward the first plate segment, and a lighting element receiving portion is formed on the side of the second portion toward the first plate segment.

[0017] In some embodiments of this application, the first part is formed to have a receiving groove, the opening of which is smaller than the sidewall of the receiving groove. The receiving groove is used to receive a part of the seal, and the opening is used to lock the seal.

[0018] In some embodiments of this application, the thickness of the plate is in the range of 1.5 mm to 2.5 mm.

[0019] In some embodiments of this application, the frame body is a one-piece molded part.

[0020] In some embodiments of this application, the straightness of the frame body from 0.5 meters to 3 meters is less than or equal to 0.5‰; the straightness of the frame body from 3 meters to 7 meters is less than or equal to 1.0‰.

[0021] In some embodiments of this application, the twist of the profiles of the main body of the frame from 0.5 meters to 3 meters is less than or equal to 0.5‰; the twist of the main body of the frame from 3 meters to 7 meters is less than or equal to 1.0‰.

[0022] In some embodiments of this application, the foamed porous filler includes one or more of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, polypropylene foam, and silicone foam.

[0023] In some embodiments of this application, the fiber material includes one of glass fiber, basalt fiber, carbon fiber, and aramid fiber, and the resin material includes polyurethane resin; the fiber reinforcement layer includes one of glass fiber mat, polyester surface mat, carbon fiber mat, and basalt fiber mat; relative to the frame per unit weight, the fiber resin composite layer includes 65%-85% fiber material and 10%-18% resin material by weight, the fiber reinforcement layer has a weight percentage of 3%-10%, and the foamed porous filler has a weight percentage of 0.5%-5%.

[0024] In some embodiments of this application, the exposed surface of the plate body of the frame body includes the fiber reinforcement layer.

[0025] The second aspect of this application provides a cabinet door assembly for a freezer, which includes the door frame assembly, door frame and door body provided in the first aspect of this application, wherein the door frame is connected to the door frame and configured to be openable and closed relative to the door frame, and the door body is mounted on the door frame.

[0026] In some embodiments of this application, the door body includes one or more of the following: vacuum glass panel, insulated glass panel, single-layer glass panel, and laminated glass.

[0027] In some embodiments of this application, the insulating glass panel includes a single insulating glass panel and a double insulating glass panel.

[0028] In some embodiments of this application, the insulating glass panel includes an inner-suspended membrane insulating glass panel. A third aspect of this application provides a refrigerator comprising a cabinet body and a door assembly provided in the second aspect of this application, the door assembly being mounted on the cabinet body. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 An exploded view of the cabinet door assembly provided in some embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a cabinet door assembly provided in some embodiments of this application;

[0032] Figure 3Schematic diagrams of the frame structure of a door frame provided for some embodiments of this application;

[0033] Figure 4A Cross-sectional structural diagrams of the plate body provided for some embodiments of this application;

[0034] Figure 4B Schematic cross-sectional view of the plate structure provided for other embodiments of this application;

[0035] Figure 4C A cross-sectional structural diagram of the plate body provided for further embodiments of this application;

[0036] Figure 5 Schematic diagrams of the frame structure of the door frame provided for other embodiments of this application;

[0037] Figure 6 A schematic diagram of the frame structure of a door frame provided for further embodiments of this application;

[0038] Figure 7 A schematic diagram of the frame structure of a door frame provided for further embodiments of this application;

[0039] Figure 8 For along Figure 2 A cross-sectional view taken from section line L1-L1;

[0040] Figure 9 for Figure 8 An enlarged structural diagram of part C1;

[0041] Figure 10 for Figure 8 An enlarged structural diagram of section C2;

[0042] Figure 11 This application provides structural schematic diagrams of the door frame structure in some embodiments;

[0043] Figure 12 An exploded structural diagram of a portion of a door frame provided for some embodiments of this application;

[0044] Figure 13 For along Figure 2 A cross-sectional view taken from section line L2-L2;

[0045] Figure 14 for Figure 10 A schematic diagram showing the tilt of the C3 section structure;

[0046] Figure 15 Exploded view of the second connecting component provided for some embodiments of this application;

[0047] Figure 16A schematic flow diagram of a frame pultrusion molding process for forming a composite frame with cavities, provided for some embodiments of this application;

[0048] Figure 17 A schematic diagram illustrating the assembly process of a refrigerator door assembly provided for some embodiments of this application;

[0049] Figure 18 A schematic diagram of the integration of an anti-condensation heating system in a composite frame assembly of a freezer door assembly provided for some embodiments of this application;

[0050] Figure 19 A schematic diagram of the fiber-reinforced composite material configuration of the frame of a refrigerator door assembly provided for some embodiments of this application;

[0051] Figure 20 A schematic diagram of the extruded cross-sectional profile of the door profile of a refrigerator door assembly provided for some embodiments of this application;

[0052] Figure 21 A cross-sectional view of the door profile of a refrigerator door assembly provided for some embodiments of this application.

[0053] Explanation of reference numerals in the attached figures

[0054] 1. Cabinet door assembly; 10. Frame assembly; 100. Frame body; 100a. Frame body main body; 1000. Panel body; 1100. Fiber resin composite material layer; 1200. Fiber reinforcement layer; 1300. Foamed porous filler; 1001. Sixth panel body; 1002. Seventh panel body; 1003. Eighth panel body; 1004. Ninth panel body; 1005. Inner panel; 1006. First panel body; 1006a. First panel segment; 1006b. Second panel segment; 1007. Second panel body; 1008. Third panel body; 1009. Fourth panel body; 11. Door frame; 110. Second frame body; 110a. Second tubular shell structure; 111. Third panel segment; 112. Fourth panel segment; 12. Door frame assembly; 120. A frame; 120a, first shell structure; 122, first connecting part; 122a, first snap-fit ​​part; 123, second connecting part; 123a, second snap-fit ​​part; 1220, receiving part; 124, gripping part; 1240, gripping plate segment; 1241, connecting plate segment; 125, lighting part; 130, intermediate frame; 130a, third shell structure; 131, first sub-frame; 1311, intermediate plate; 1312, intermediate plate segment; 132, second sub-frame; 133, reinforcing frame; 14, buffer; 141, protrusion; 142, body; 15, suction part; 16, first reinforcing member; 17, second reinforcing member; 20, door; 21, first connecting assembly; 211, first connecting body; 212 21. Second connector; 22. Second connector assembly; 221. Third connector; 222. Fourth connector; 23. Reinforcing member; 231. First reinforcing part; 232. Second reinforcing part; 223. Wiring channel; 224. Wiring device; 30. Fixing member; 31. First part; 31a. First snap-fit ​​part; 31c. Storage slot; 32. Second part; 32b. Second snap-fit ​​part; 40. Sealing member; X. Length direction; Y. Thickness direction; Z. Height direction; A. First direction; B. Second direction; C. Third direction; D. Rotation direction; 200. Fiber from yarn frame; 202. Yarn guide plate; 204. Pre-forming tooling; 206. Glue injection box; 208. Molding mold and heater; 210. Traction mechanism; 214. Displacement direction; 300. Process flow; 302. Profile cutting; 304. Corner splicing; 306. Intermediate frame connection; 308. Frame structure assembly; 310. Glass clamping; 312. Sealing strip installation; 314. Hinge and lock installation; 316. Electrical wiring for lighting and heating systems; 400. Anti-condensation heating controller; 402. Indoor temperature and humidity probe; 404. Frame probe; 406. Schematic diagram of glass frame heating structure; 410. Internal probe placement; 412. Frame probe placement; 414. Schematic diagram of frame cross-section structure; 416. Wiring or pipe channel; 418. Frame sealing groove; 700. Fiber resin composite material layer; 702. Fiber resin composite material layer;704. Fiber-reinforced composite layer; 706. Fiber-reinforced composite layer; 708. Composite laminate; 710. Fiber-reinforced layer; 712. Fiber-reinforced layer; 716. Fiber-reinforced layer; 800. Vertical frame; 802. Gradient porous foam core layer; 804. Fiber-reinforced protective layer; 806. Integrated heating channel; 810. Mounting structure. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] A freezer typically includes a cabinet and door assemblies mounted on the cabinet. The cabinet has a storage space for storing items, food, etc. The freezer also typically includes a temperature control device to maintain the temperature of the storage space within a preset range. Therefore, freezers are expected to have good insulation and energy-saving performance.

[0057] Large freezers are widely used in shopping malls, supermarkets, restaurants, and medical settings. Improving their insulation and energy-saving performance is a key challenge. Research has shown that deformation of the door frame or body frame, as well as the inherent thermal insulation properties of the aluminum alloy profiles, can negatively impact the insulation performance of large freezers, leading to increased energy consumption and increased condensation. To address this, related technologies use thick-walled aluminum alloy profiles to reduce deformation and improve insulation, but this increases material costs, increases profile size, and makes installation and transportation difficult. To address these issues, the inventors of this application have improved the rigidity and thermal insulation of the profiles by modifying their material and structure. This reduces the risk of poor sealing due to door frame or body frame deformation, as well as the risk of poor insulation due to thermal conductivity of the profiles.

[0058] Based on the above technical concept, embodiments of this application provide a door frame assembly, a door assembly, and a freezer for a freezer.

[0059] A first aspect of this application provides a door frame assembly for a freezer. The door frame assembly includes multiple frames, each frame including a frame body and a porous material. The frame body includes multiple connected plates defining cavities. Foamed porous filler fills the cavities. Each plate includes at least one layer of fiber resin composite material and at least one layer of fiber reinforcement. The fiber resin composite material layer and the fiber reinforcement layer are stacked along the thickness direction of the plate. The thickness of the plate is in the range of 1.5 mm to 3 mm. In at least one of the multiple frames, the frame body includes a grip portion formed by a portion of the plate.

[0060] Because the main frame is constructed from layers of fiber-reinforced resin composite material and fiber reinforcement, with a thickness ranging from 1.5 mm to 3 mm, it possesses excellent tensile and bending strength. Even with a long frame, it is not prone to deformation, reducing the likelihood of poor sealing due to frame deformation, thus improving the freezer's insulation performance. Furthermore, the interconnected cavities formed by multiple panels, filled with foamed porous filler, enhance the frame's thermal insulation properties, further improving the freezer's overall insulation. Moreover, the combination of the door frame and intermediate frames increases the structural strength and rigidity of the door frame, further enhancing its shape retention. Even with a large lateral span, the use of an appropriate number of intermediate frames can reduce localized deflection due to gravity, further improving the freezer's insulation performance. Furthermore, since the grip is also formed through the plate, there is no need to install a separate handle, which reduces the risk of affecting the thermal insulation performance due to poor heat insulation of the handle mounting part. In addition, the handle installation process is omitted. Furthermore, since the plate has sufficient strength and rigidity, it can meet the requirement that the grip is not easily bent or deformed, and it can have sufficient fatigue strength.

[0061] The freezers described in this application mainly refer to types including cabinet bodies and door assemblies, including but not limited to refrigerators, freezers, and constant temperature cabinets with heating and / or cooling functions. This application does not have particular limitations on the external dimensions and internal storage space of the freezers; they can be small freezers, household refrigerators, large commercial refrigerated display cases, etc.

[0062] The freezer door assembly may include a frame assembly and auxiliary mounting components. The frame assembly may include a door frame and a door body frame, and optionally, an intermediate frame, which may be connected to either the door frame or the door body frame. Auxiliary mounting components may include the door body mounted on the door body frame, connecting components such as hinges, lighting components, and a temperature display. The door frame refers to the component installed on the edge of the freezer body for mounting the freezer door; the intermediate frame refers to the component installed on the door frame and functioning as the door frame; the door body frame refers to the frame of the freezer door, used to mount the door, which may be a glass door or a door made of other materials. The door body frame is mounted to the door frame via hinges, etc., to enable the opening and closing of the door. The freezer door may be single or multiple doors.

[0063] The door frame assembly of this application embodiment can be used to form the cabinet door assembly of a freezer. Specifically, the door frame assembly includes a door frame and is used in conjunction with the door frame. The door frame assembly also includes an auxiliary mounting component connected to the door frame.

[0064] The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0065] Figure 1 An exploded view of the cabinet door assembly provided in some embodiments of this application; Figure 2 This is a structural schematic diagram of a cabinet door assembly provided in some embodiments of this application.

[0066] For ease of explanation, X, Y, and Z are used to represent the length, thickness, and height directions of the freezer, respectively. There are no specific limitations on the dimensions of the freezer in the X, Y, and Z directions. For household freezers, the height (Z) dimension is typically larger than the length (X) and thickness (Y) dimensions. For large commercial freezers, the length (X) dimension is typically much larger than the thickness (Y) and also larger than the height (Z) dimension.

[0067] like Figure 1 and Figure 2 As shown, the cabinet door assembly 1 for the freezer includes a door frame, a door frame assembly, and a door 20. The door frame (including a door frame 11 and an intermediate frame 130) and the door frame assembly 12 both include multiple frames 100. That is, the cabinet door assembly includes a frame assembly, and the frame assembly includes multiple frames 100. These frames 100 can be used to form the door frame assembly or the door frame.

[0068] For ease of distinction, the frame used to form the door frame assembly 12 is referred to as the first frame 120, the frame used to form the door frame 11 is referred to as the first frame 120, and the intermediate frame in the door frame assembly is referred to as the intermediate frame 130. In the following text, unless otherwise specified, the first frame, the second frame, and the intermediate frame are collectively referred to as frame 100.

[0069] Figure 3 Schematic diagrams of the frame structure of a door frame provided for some embodiments of this application; Figure 5 A schematic diagram of the frame structure of a door frame provided for some other embodiments of this application. Figure 6 This is a structural schematic diagram of the frame of a door frame provided for some other embodiments of this application. Figure 7 A schematic diagram of the frame structure of a door frame provided for some further embodiments of this application. Figure 11 The diagram shows the structural features of a door frame as provided in some embodiments of this application. Figure 3 and Figures 5 to 7 , Figure 11 As shown, the frame 100 may include a frame body 100a, and the frame body 100a may include a plurality of connected plates 1000. These plates 1000 define cavities S. Cavities S may be filled with foamed porous filler 1300.

[0070] like Figure 3As shown, the frame body 100a can be formed with a closed annular cross-section, which can be approximately rectangular. However, the embodiments of this application are not limited to this. In some embodiments, the cross-section of the frame body can also be a regular shape such as approximately circular, triangular, or hexagonal. In some embodiments, the cross-section of the frame body can also be irregular.

[0071] The following is combined with Figures 4A to 4C The structure of the plate is described. Figure 4A Cross-sectional structural diagrams of the plate body provided for some embodiments of this application; Figure 4B Cross-sectional structural schematic diagrams of the plate body provided for other embodiments of this application; Figure 4C A cross-sectional structural diagram of a plate provided for further embodiments of this application.

[0072] like Figures 4A to 4C As shown, the plate 1000 may include at least one fiber-reinforced resin composite layer 1100 and at least one fiber-reinforced layer 1200. The fiber-reinforced resin composite layer 1100 and the fiber-reinforced layer 1200 are stacked along the thickness direction of the plate 1000. The thickness of the plate is in the range of 1.5 mm to 3 mm. In at least one of the plurality of frames, the frame body includes a gripping portion 124 formed from a portion of the plate.

[0073] In some embodiments, such as Figure 4A As shown, the plate 1000 may include a layer of fiber-reinforced resin composite material 1100 and a layer of fiber reinforcement 1200 stacked together. In other embodiments, such as Figure 4B and Figure 4C As shown, the plate 1000 may include a layer of fiber resin composite material 1100 and two layers of fiber reinforcement 1200 stacked together, with the fiber resin composite material layer 1100 located between the two layers of fiber reinforcement 1200.

[0074] In some embodiments, some of the multiple panels 1000 constituting the frame body 100a may be exposed to the outside. Specifically, when the frame body is used in a freezer, the panels that the user can directly see are those exposed to the outside. The exposed surfaces of the panels 1000 may have a fiber reinforcement layer 1200, i.e., the fiber reinforcement layer 1200 is located on the outermost side of the panel 1000, thereby increasing the strength of the exposed panels 1000 and reducing the deformation of the panels 1000 under external forces.

[0075] In some embodiments, the fiber reinforcement layer 1200 on the surface may also contain materials such as colorants to form a structure suitable for use as an appearance part, thereby improving the user experience. The fiber reinforcement layer 1200 on the surface may be referred to as a surface felt.

[0076] In some embodiments, the frame body 110a can be made by pultrusion molding process. The fiber reinforcement layer 1200 on the surface is smooth after pultrusion process, with no obvious burrs when touched, and has a smooth feel, resulting in a better user experience.

[0077] The fiber material includes one or more of glass fiber, basalt fiber, carbon fiber, and aramid fiber. The resin material includes polyurethane resin, for example, one or more of aromatic polyurethane and aliphatic polyurethane. In one specific embodiment, the fiber resin composite layer is a glass fiber reinforced polyurethane resin layer. In some embodiments, the fiber reinforcement layer 1200 may include one or more of glass fiber mat, polyester surface mat, carbon fiber mat, and basalt fiber mat. In one specific embodiment, the fiber reinforcement layer 1200 is glass fiber mat. Thus, the plate 1000 adopts an alternating layering design of fiber resin composite layer (main load-bearing layer) and fiber reinforcement layer (auxiliary reinforcement layer) along the layer thickness direction to improve the strength and stiffness of the plate and thus the frame body, especially to improve the strength and stiffness of the frame body 100a in the length direction (which can also be regarded as the extension direction), that is, even if the frame body 100a has a length of more than 2 meters, it can maintain its shape well and is not prone to bending deformation.

[0078] In addition, since the thermal conductivity of the fiber resin composite layer and the fiber reinforcement layer is much lower than that of aluminum alloy, it has good thermal insulation performance.

[0079] Furthermore, the cavity S is filled with a foamed porous filler 1300. The foamed porous filler 1300 includes one or more of polyurethane foam, polystyrene foam, and phenolic foam. These foamed porous fillers have low thermal conductivity, which is beneficial for blocking heat conduction. Moreover, these foamed porous fillers are lightweight, which helps to reduce the overall weight of the frame 100.

[0080] In addition, the use of high-strength, high-compression-resistance foamed porous filler can create a synergistic effect with the frame body 100a, further improving the overall deformation resistance of the frame 100. For example, polyurethane foam can be used as the foamed porous filler 1300.

[0081] In another specific embodiment, in the plate 1000 of the frame body 100a, a fiber reinforcement layer 1200 is laminated on each side of the fiber resin composite material layer in the thickness direction. The fiber resin composite material layer is a glass fiber reinforced polyurethane resin layer, and the fiber reinforcement layer 1200 is a glass fiber mat. The cavity S of the frame body 100a is filled with polyurethane foam.

[0082] Thus, through the synergistic effect of the fiber resin composite material layer, fiber reinforcement layer, and foamed porous filler, the deformation resistance and heat insulation of the frame 100 are greatly improved, reducing the risk of poor sealing caused by deformation of the door frame and / or door body frame, and also reducing the risk of condensation caused by poor heat insulation of the door frame and / or door body frame itself. Correspondingly, the energy consumption of the freezer is reduced and the heat preservation performance of the freezer is improved.

[0083] In some embodiments, relative to the unit weight of the frame, the fiber resin composite layer 1100 comprises 65%-85% fiber material and 10%-18% resin material by weight, the fiber reinforcement layer 1200 comprises 3%-10% by weight, and the foamed porous filler comprises 0.5%-5% by weight.

[0084] In some embodiments, the weight percentage of fiber material relative to the unit weight of the frame can be 65%, 68%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 85%, or values ​​between these values.

[0085] In some embodiments, the weight percentage of resin material relative to the unit weight of the frame can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, or 17% or 18%.

[0086] In some embodiments, the weight percentage of the foamed porous filler relative to the unit weight of the frame can be 0.5%, 1%, 1.2%, 1.5%, 2%, 3%, 4%, 5%, or values ​​between these values.

[0087] In some embodiments of this application, the tensile strength of the plate 1000 can be approximately 565 MPa-1130 MPa.

[0088] In some embodiments, the tensile strength of the plate 1000 can be approximately 580 MPa, 600 MPa, 630 MPa, 650 MPa, 680 MPa, 700 MPa, 730 MPa, 750 MPa, 780 MPa, 800 MPa, 830 MPa, 850 MPa, 880 MPa, 900 MPa, 920 MPa, 950 MPa, 980 MPa, 1000 MPa, 1030 MPa, 1050 MPa, or 1100 MPa.

[0089] In some embodiments, the tensile modulus of elasticity of the plate 1000 can be approximately 28,900 MPa to 57,000 MPa.

[0090] In some embodiments, the tensile modulus of elasticity of the plate 1000 can be approximately 28900 MPa, 29200 MPa, 29500 MPa, 29800 MPa, 30000 MPa, 30300 MPa, 30500 MPa, 30800 MPa, 31000 MPa, 31300 MPa, 31500 MPa, 31800 MPa, 32000 MPa, 32300 MPa, 32500 MPa, 32800 MPa, 33000 MPa, 33300 MPa, 33500 MPa, 33800 MPa, 34000 MPa, 34300 MPa, 34500 MPa, 34800 MPa, or 35000 MPa. a. 35300MPa, 35500MPa, 35800MPa, 36000MPa, 36300MPa, 36500MPa, 36800MPa, 36000MPa, 37300MPa, 37500MPa, 37800MPa, 38000MPa, 38300MPa, 38500M Pa, 38800MPa, 39000MPa, 39300MPa, 39500MPa, 39800MPa, 40000MPa, 40300MPa, 40500MPa, 40800MPa, 41000MPa, 41300MPa, 41500MPa, 41800MPa, 42000 MPa, 42300MPa, 42500MPa, 42800MPa, 43000MPa, 43300MPa, 43500MPa, 43800MPa, 44000MPa, 44300MPa, 44500MPa, 44800MPa, 45000MPa, 45300MPa, 455 49 000MPa, 49300MPa, 49500MPa, 49800MPa, 50000MPa, 50000MPa, 50300MPa, 50500MPa, 50800MPa, 51000MPa, 51300MPa, 51500MPa, 51800MPa, 52000MPa, 5 2300MPa, 52500MPa, 52800MPa, 53000MPa, 53300MPa, 53500MPa, 53800MPa, 54000MPa, 54300MPa, 54500MPa, 54800MPa, 55000MPa, 55300MPa, 55500MPa,55800MPa, 56000MPa, 56300MPa, 56500MPa, or 56800MPa.

[0091] In some embodiments, the thermal conductivity of the plate is between 0.3 and 0.8 W / (m*K).

[0092] In some embodiments, the thermal conductivity of the plate can be 0.30 W / (m*K), 0.35 W / (m*K), 0.40 W / (m*K), 0.45 W / (m*K), 0.50 W / (m*K), 0.55 W / (m*K), 0.60 W / (m*K), 0.65 W / (m*K), 0.70 W / (m*K), 0.75 W / (m*K), or 0.80 W / (m*K).

[0093] Table 1: Comparison of parameters of aluminum alloy, rigid PVC and glass fiber resin composite material of the present application embodiments.

[0094]

[0095] In Table 1, rigid PVC refers to rigid polyvinyl chloride (PVC). When using stars to indicate performance quality, more stars indicate better performance.

[0096] In the glass fiber resin composites in Table 1, the weight percentage of fiber material is 78.8%.

[0097] As can be seen from Table 1, the tensile strength and bending strength of the plate 1000 in this embodiment are higher than those of aluminum alloy and rigid PVC. Therefore, the frame of this embodiment has superior mechanical properties and shape retention, and is not prone to bending deformation even when it is over 2 meters long. Furthermore, the plate 1000 has good thermal insulation properties.

[0098] In some embodiments, the thickness of the plate 1000 is in the range of 1.5 mm to 3 mm. In some embodiments, the thickness of the plate 1000 is in the range of 1.5 mm to 2.5 mm.

[0099] In some embodiments, the thickness of the plate 1000 can be approximately 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm.

[0100] If the thickness of the board is less than 1.5 mm, the corresponding production process becomes more difficult and complex, the production cost increases, and under such thickness limitations, the fusion between fiber materials and resin materials is uneven, making mass production difficult.

[0101] Furthermore, if the thickness of the panel is less than 1.5 mm, its bending strength is typically less than 750 MPa, its tensile strength is less than 540 MPa, and its straightness over 2.5 meters is around 2‰. Due to the low straightness accuracy and poor sealing performance, such panels are not suitable for use in the frame components of large-scale thermal insulation equipment.

[0102] On the other hand, if the thickness of the panel is greater than 3 mm, more raw materials are needed during production, and the increased panel thickness makes handling inconvenient. Increased panel thickness also leads to increased weight of the frame components and insulation equipment as a whole, further complicating handling. Furthermore, increased panel thickness raises production costs.

[0103] In the exemplary embodiments provided in this application, the thickness of the panel is in the range of 1.5 to 3 mm, and the profile of the panel is the same as that in the aforementioned embodiments. The cavity is filled with porous filler. Therefore, given a certain length and width of refrigerator geometry, the sound emitted by the refrigerator when opening and closing the door will have a relatively specific frequency spectrum. This frequency spectrum of the embodiment is different from the sound emitted by the door of a traditional aluminum alloy refrigerator, for example. Thus, when opening and closing the door, the user not only experiences a different tactile feel due to the unique surface finish, but also a crisp sound frequency spectrum that differs from other refrigerators, providing a different user experience. When a warehouse contains the refrigerator provided in this embodiment as well as other refrigerators, and the sounds emitted by the refrigerators of different sizes are different, the user's recognition and acceptance of the refrigerator in this embodiment can be enhanced.

[0104] In this embodiment, the frame body 100a can be formed by pultrusion. The resulting frame body 100a has a low surface roughness, and the surface feels smooth to the touch without any obvious burrs. No additional surface optimization measures such as surface coatings are required, thereby simplifying the manufacturing process, improving production efficiency, and reducing manufacturing costs.

[0105] Table 2:

[0106]

[0107] In some specific embodiments, the plate body is as follows: Figure 4BAs shown, the frame comprises one glass fiber resin composite layer 1100 and one or two fiber-reinforced layers 1200. Relative to a unit weight of the frame, the glass fiber resin composite layer comprises 80% fiber material and 10% resin material by weight, the fiber-reinforced layers comprise 5% by weight, and the foamed porous filler comprises 3% by weight. It should be noted that the glass fiber resin composite layer may also include coupling agents, colorants, etc., with the total weight percentage of all components being 100%.

[0108] In Example 1, the weight ratio of fiber material relative to the unit weight of frame 100 can be approximately 78.8%. The performance parameters of the plate 1000 in Example 1 are shown in Table 3 below.

[0109] Table 3:

[0110]

[0111] As shown in Table 3, in an embodiment where the weight percentage of fiber material in the plate 1000 relative to the unit weight of the frame 100 is approximately 78.8%, the tensile strength of the plate 1000 can be approximately 942 MPa, the tensile modulus of elasticity of the plate 1000 can be approximately 48100 MPa, the flexural strength of the plate 1000 can be approximately 1330 MPa, and the flexural modulus of the plate 1000 can be approximately 41900 MPa.

[0112] The plate 1000 shown in Table 3 has enhanced fracture resistance, making it less prone to breakage during use, and also has good impact resistance, thus extending the fatigue life of the door frame assembly. The plate 1000 shown in Table 3 also has enhanced bending resistance, exhibiting good fracture resistance under bending loads during use and reducing plate deformation.

[0113] In some embodiments of this application, the straightness of the frame body 100a from 0.5 meters to 3 meters is less than or equal to 1.0‰.

[0114] In some embodiments of this application, the straightness of the frame body 100a from 3 meters to 7 meters is less than or equal to 1.0‰.

[0115] Straightness refers to the maximum vertical distance between the contact surface of a profile (frame 100 in this embodiment) and the platform surface when the profile is placed on the platform. A predetermined length of profile is placed on the platform, or a predetermined length of steel ruler is placed against the plane of the profile, and a feeler gauge is used to measure the maximum gap between the profile plane and the steel ruler.

[0116] The straightness of the profile ≤1 / 1000 means that when testing a profile of a predetermined length, the total deviation over the entire length does not exceed 1 / 1000 of the total length.

[0117] As mentioned above, since the straightness of the frame body 100a in the range of 0.5 meters to 7 meters is not easily deformed, the situation of poor sealing of the freezer caused by frame deformation can be reduced, thereby improving the energy-saving performance and heat preservation performance of the freezer.

[0118] In some embodiments of this application, the torsion of the frame body 100a from 0.5 meters to 3 meters is less than or equal to 0.5‰.

[0119] In some embodiments of this application, the torsion of the frame body 100a over a distance of 3 to 7 meters is less than or equal to 1.0‰. Torsion refers to the angle of relative twist between two cross-sections of a profile (frame 100 in this embodiment) at a fixed length interval. A 1-meter-long profile is placed on a platform with one end pressed against it. When the profile stabilizes under its own weight, the gap between the two ends of the raised end of the profile and the platform is measured. The difference between these two values ​​is the torsion of the profile, reflecting the degree of distortion of the profile's longitudinal axis from an ideal straight line.

[0120] Material torsion ≤1 / 1000 means that when testing a profile of a predetermined length, the total torsion deviation over the entire length does not exceed 1 / 1000 of the total length.

[0121] As mentioned above, the torsion of the frame body 100a in the range of 0.5 meters to 7 meters is not easily deformed in the range of 0.5 meters to 7 meters, which can reduce the situation of poor sealing of the freezer due to frame deformation, thereby improving the energy-saving performance and heat preservation performance of the freezer.

[0122] In some embodiments of this application, the length of the frame body 100a ranges from 0.5 meters to 7 meters. In some embodiments, the length of the frame body 100a can be approximately 0.5 meters, 0.6 meters, 0.7 meters, 0.8 meters, 0.9 meters, 1 meter, 1.5 meters, 2 meters, 2.5 meters, 2.6 meters, 2.7 meters, 2.8 meters, 2.9 meters, 3 meters, 3.5 meters, 4 meters, 4.5 meters, 5 meters, 5.5 meters, 6 meters, 6.5 meters, or 7 meters.

[0123] In some embodiments of this application, the length of the frame body 100a ranges from 2.5 meters to 15 meters. In some embodiments, the length of the frame body 100a can be approximately 2.6 meters, 2.7 meters, 2.8 meters, 2.9 meters, 3 meters, 3.5 meters, 4 meters, 4.5 meters, 5 meters, 5.5 meters, 6 meters, 6.5 meters, 7 meters, 7.5 meters, 8 meters, 8.5 meters, 9 meters, 9.5 meters, 10 meters, 10.5 meters, 11 meters, 11.5 meters, 12 meters, 12.5 meters, 13 meters, 13.5 meters, 14 meters, or 14.5 meters.

[0124] In some embodiments of this application, the length of the frame body 100 is in the range of 2.5 meters to 15 meters, the deviation of straightness of 2.5 meters is less than or equal to about 1‰, and the deviation of torsion of 2.5 meters is less than or equal to about 1‰.

[0125] Such a panel 1000 can be used for door frame components of large-scale thermal insulation equipment. Specifically, the frame body 100a is relatively long, which can meet the dimensional requirements of door frame components of large-scale thermal insulation equipment, while the deviations in straightness and torsion are small. This results in less error during the assembly of the door frame component, which helps to improve the sealing between the cabinet door component and the cabinet body, and between the door frame and the door body in the cabinet door component, thereby improving the thermal insulation effect. For thermal insulation equipment, due to the improved thermal insulation effect, the same thermal insulation performance can be achieved by achieving energy saving and reducing electricity costs.

[0126] In related technologies, the straightness of aluminum alloy profiles is generally above 2‰, and the torsion is generally above 5‰. Due to the large deviations in straightness and torsion, the installation deviation of aluminum alloy profiles is large, resulting in poor sealing between them and the door body, making them unsuitable for door frames of large thermal insulation equipment.

[0127] In the case of forming a door frame or door body frame, the frame 100 of the embodiments of this application may have different cross-sectional structures depending on the circumstances.

[0128] In some embodiments of this application, such as Figure 3 , Figures 5 to 10 As shown, the frame 100 is formed to include a tubular structure. Here, the part of the plate that forms a closed annular cross-section is called the tubular structure. The tubular structure is hollow, and the hollow part is the cavity S.

[0129] Depending on its position within the door frame assembly, the frame 100 may include, in addition to the tubular structure, other structures formed by the plate.

[0130] In some embodiments, the frame body includes a tubular shell structure with a closed annular cross-section and plate segments extending relative to the tubular shell structure. The tubular shell structure forms a cavity S, and the plate segments are used to connect functional components. Functional components include a door, a seal, a door handle (grip), etc. The cabinet door assembly of this application embodiment can be used in a heat-insulating device (refrigerator). For example, the door frame assembly can be combined with a door frame and a door to form a cabinet door assembly for a heat-insulating device. Because the cabinet door assembly of this application has good heat-insulating performance, the heat-insulating performance of the heat-insulating device using the cabinet door assembly of this application can also be improved.

[0131] The structure of the door frame assembly 12 is described below.

[0132] In some embodiments, such as Figure 1 As shown, the frame of the door frame assembly 12 may include multiple first frames 120, and the multiple first frames 120 connected together can form the door frame assembly 12. The door 20 can be installed on the door frame assembly 12. The assembled door frame assembly 12 and the door 20 together form the cabinet door of the freezer, and the cabinet door and the door frame 11 together form the cabinet door assembly.

[0133] The cabinet door can be single or multiple. For example, Figure 1 and Figure 2 An embodiment with two cabinet doors is shown. This document describes the structure of a single cabinet door. In the case of a double-door freezer, two cabinet doors with essentially identical structures can be connected to the door frame 11 in an axially symmetrical manner, and the two doors can be installed in a mutually opening manner. "Perpendicular opening" means that the door hinges of the two doors are far apart while the door handles are close together, and the doors are opened by pulling or pushing in the same direction. For a freezer, both doors open in a direction away from the freezer's storage space.

[0134] In some embodiments, the door frame assembly 12 can be rectangular, formed by connecting four first frame bodies 120 end to end.

[0135] like Figure 3 , Figures 5 to 7 As shown, the first frame 120 may include a shell structure (i.e., the first shell structure 120a). A plurality of plates include a first plate 1006, which includes a first plate segment 1006a and a second plate segment 1006b. The second plate segment 1006b is connected to the first plate segment 1006a and serves as part of the shell structure (first shell structure 120a). The first plate segment 1006a extends from the shell structure (first shell structure 120a), and the first plate segment 1006a and the shell structure (first shell structure 120a) form a door mounting portion. In the first plate 1006, at least the first plate segment 1006a is formed as a flat plate, and the length of the first plate segment 1006a extending relative to the shell structure (first shell structure 120a) is in the range of 3 mm to 6 mm.

[0136] For ease of distinction, the two plates opposite each other along the first direction A are referred to as the first plate 1006 and the second plate 1007, respectively. The extending direction of the first plate 1006 and the second plate 1007 can also be referred to as the second direction B. Furthermore, the other two plates connected to the first plate 1006 and the second plate 1007 and defining the cavity S are referred to as the third plate 1008 and the fourth plate 1009, respectively. The third plate 1008 and the fourth plate 1009 are opposite each other along the third direction C. Here, the first direction A, the second direction B, and the third direction C are all perpendicular to each other.

[0137] The first plate 1006, the second plate 1007, the third plate 1008, and the fourth plate 1009 are connected to define a cavity S, and the portion of each plate forming the cavity S forms a shell structure. In other words, the shell structure may include the entire plate or a portion of the plates 1006, 1007, 1008, and 1009. For ease of distinction, the shell structure of the first frame 120 is referred to as the first shell structure 120a.

[0138] The first plate 1006 includes a first plate segment 1006a and a second plate segment 1006b. Figure 3 , Figure 5 In the embodiment shown, the first plate 1006 is integrally formed as a flat plate.

[0139] Optionally, the first plate 1006 may also be locally formed with a certain curvature, such as... Figure 6 As shown, the first plate segment 1006a in the first plate body 1006 has a certain curvature.

[0140] The first plate segment 1006a is used to contact a portion of the door body 20. The first plate segment 1006a can also be connected to the door body 20 to facilitate bonding with the door body 20. Optionally, the surface of the first plate segment 1006a that contacts the door body 20 can be designed with a grooved texture to increase friction with the door body 20 and also to help retain adhesive.

[0141] The door body 20, which is assembled with the first frame 120, is generally plate-shaped. The end edge of the door body 20 abuts against the first plate 1006, and one or both sides of the near end edge contact and bond with the surface of the first plate segment 1006a. Figures 8 to 10 The embodiment shows a structure in which one side surface contacts the second plate segment 1006b, but it may also include another plate segment connected to the third plate 1008, which is opposite to the first plate segment 1006a along the first direction A and contacts both sides of the door body 20 respectively.

[0142] In some embodiments, along the third direction C, the length of the first plate segment 1006a extending relative to the first shell structure 120a can be in the range of 3 mm to 8 mm, preferably in the range of 3 mm to 6 mm. In some embodiments, the thickness of the plate body 1000 can be approximately 3.5 mm, 4 mm, 4.5 mm, 5 mm, or 5.5 mm. The first plate segment 1006a at a suitable extension length facilitates reliable connection to the door body 20 and does not excessively obstruct the door body 20.

[0143] In some embodiments, a prompting light, a temperature display, etc., may be provided on the side of the first panel segment 1006a away from the door body.

[0144] In some embodiments, the surface of the first panel segment 1006a facing away from the door body is exposed to the outside, and the surface includes a fiber reinforcement layer.

[0145] In other embodiments, the first frame 120 may not have a first panel segment. Such a first frame 120 without a first panel segment can be used in conjunction with a first frame 120 having a first panel segment to jointly form a door frame.

[0146] In some embodiments, the first frame 120 may further include a first connecting portion 122 and a second connecting portion 123, wherein the first connecting portion 122 and the second connecting portion 123 may be formed from a portion of the third plate 1008 and the fourth plate 1009, respectively. They are connected to both ends of the second plate 1007 and extend along the first direction A in a direction away from the first plate 1006.

[0147] In some embodiments, such as Figure 8 , Figure 9 , Figure 11 As shown, the cabinet door assembly 1 may also include a fastener 30. The fastener 30 engages with the first connecting part 122 and the second connecting part 123, thereby clamping the door body 20 from both sides of the second plate segment 1006b in the thickness direction.

[0148] In some embodiments, the first connecting part 122 and the second connecting part 123 can be connected to the fixing member 30 by means of screw connection, snap connection, fastener connection or other methods.

[0149] like Figures 8 to 10 As shown, the fastener 30 may include a first part 31 and a second part 32 connected together. The first part 31 may be snapped together with the first connecting part 122 and the second connecting part 123 respectively. The second part 32 is connected to the first part 31 and extends in a direction away from the first connecting part 122 and also in the direction where the second plate segment 1006b is located.

[0150] In some embodiments, at least one of the first connecting portion 122 and the second connecting portion 123 is provided with a heating element receiving portion, which is located between the fixing member 30 and the shell structure.

[0151] The first connecting part 122 and the second connecting part 123 are respectively provided with a first latching part 122a and a second latching part 123a on opposite sides along the third direction C.

[0152] In some embodiments, the first connecting portion 122 is provided with a first latching portion 122a, and the second connecting portion 123 is provided with a second latching portion 123a. The first latching portion 122a and the second latching portion 123a are respectively used to connect with the fixing member 30.

[0153] Both the first latching portion 122a and the second latching portion 123a are formed such that they protrude more as they approach the first tube shell structure 120a along the third direction C.

[0154] In some embodiments, the first portion 31 of the fastener 30 has two snap-fit ​​parts, namely a first snap-fit ​​part 31a and a second snap-fit ​​part 32b. Both the first snap-fit ​​part 31a and the second snap-fit ​​part 32b are formed to include a connected recess and a protrusion.

[0155] With the fastener 30 engaged with the first connecting portion 122 and the second connecting portion 123, the first snap-fit ​​portion 31a engages with the first snap-fit ​​portion 122a, and the second snap-fit ​​portion 32b engages with the second snap-fit ​​portion 123a. The most protruding portion of each of the first snap-fit ​​portion 122a and the second snap-fit ​​portion 123a engages with the recessed portion of each of the first snap-fit ​​portion 31a and the second snap-fit ​​portion 32b. The protruding portions of each of the first snap-fit ​​portion 31a and the second snap-fit ​​portion 32b engage with the side of the most protruding portion of each of the first snap-fit ​​portion 122a and the second snap-fit ​​portion 123a closest to the first tubular shell structure 120a. This ensures a reliable connection between the fastener 30 and the first frame 120.

[0156] like Figures 7 to 9 As shown, along the thickness direction Y of the freezer (which is also the thickness direction of the door 20), the second part 32 can be positioned opposite to the second plate segment 1006b, and the second part 32 and the second plate segment 1006b together clamp and fix the door 20.

[0157] In addition, the part of the second part 32 that abuts against the door body 20 is formed with an arc-shaped surface, thereby reducing the probability of scratching the door body 20.

[0158] The fastener 30 can generally be made of materials such as PVC (Polyvinyl chloride), ABS (a terpolymer of acrylonitrile (A), butadiene (B), and styrene (S) monomers), or PA66 (polyamide, a polymeric polyamide resin (PA)). In some embodiments, the cabinet door assembly 1 may also include a lighting assembly, which may include a light-emitting device such as a light-emitting diode for illumination.

[0159] like Figures 8 to 10 As shown, the second part 32 can be formed as an illumination unit 125, and an illumination component can be disposed in the illumination unit.

[0160] like Figures 8 to 10 As shown, when the fastener 30 is assembled on the first frame 120, a receiving space is formed between the fastener 30 and the first tubular shell structure 120a.

[0161] The first connecting portion 122 and the second connecting portion 123 may also be provided with a receiving portion 1220, which can be used for circuit wiring or mounting electronic components. For example... Figures 8 to 10 As shown, the cabinet door assembly 1 also includes a sealing element 40, which is mounted on the fixing element 30. The first portion 31 of the fixing element 30 forms a receiving groove 31c, the opening of which is significantly narrower than the sidewall of the receiving groove 31c. A portion of the sealing element 40 extends into the receiving groove 31c and is secured by the opening of the receiving groove 31c. The other portion of the sealing element 40 is located on the side of the fixing element 30 facing the door frame 11 when the door is closed. In the closed state, the sealing element 40 is in close contact with the second frame 110 or the intermediate frame 130, forming a seal.

[0162] In some embodiments, such as Figure 5 and Figure 7 As shown, the first frame 120 also includes a gripping portion 124, which may be formed by a plate. The gripping portion 124 is connected to the first tubular structure 120a, and a gripping space for fingers to be inserted is formed between the gripping portion 124 and the first tubular structure 120a.

[0163] like Figure 5 and Figure 7 As shown, the gripping part 124 includes a gripping plate segment 1240 and a connecting plate segment 1241. The connecting plate segment 1241 is connected between the gripping plate segment 1240 and the tube shell structure, and there is a gap between the gripping plate segment 1240 and the tube shell structure.

[0164] like Figure 5As shown, the holding plate segment 1240 is configured as a flat plate. Along the thickness direction of the first plate segment, the holding plate segment 1240 is located on the side of the second plate segment 1006b away from the shell structure, and there is a gap between the second plate segment 1006a and the holding plate segment 1240.

[0165] like Figure 7 As shown, the holding plate segment 1240 is configured as a hollow tube. Along the thickness direction of the first plate segment 1006a, the holding plate segment 1240 is located on the side of the first plate segment 1006b away from the tube shell structure, and there is a gap between the first plate segment 1006a and the holding plate segment 1240.

[0166] In some embodiments, the surface of the grip portion 124 facing away from the door body is exposed to the outside, and the surface includes a fiber-reinforced layer.

[0167] In some embodiments, such as Figure 13 , Figure 14 as well as Figure 15 As shown, the cabinet door assembly 1 may further include a second connecting component 22, which can be used to connect the door frame 11 and the door body frame assembly 12. Part of the second connecting component 22 can be connected to the door frame 11, and part of the second connecting component 22 can be connected to the door body frame assembly 12.

[0168] In some embodiments, one end of the second connecting component 22 may be connected to one end of the door frame 11, and the other end of the second connecting component 22 may extend into two sequentially connected first frame bodies 120 to connect the two first frame bodies 120 and the door frame 11.

[0169] In some embodiments, one end of the second connecting component 22 may also be connected to the cabinet. For example, one end of the second connecting component 22 may also pass through the third panel segment 111 and be connected to the cabinet.

[0170] like Figure 11 and Figure 15 As shown, the second connecting component 22 may include a third connecting body 221, a fourth connecting body 222 and a reinforcing member 23. The third connecting body 221 is connected to the door frame 11, specifically to the top frame in the door frame 11, and the fourth connecting body 222 is connected to the first frame 120, i.e., the door frame.

[0171] In some embodiments, the second connecting assembly 22 may further include a reinforcing member 23, which may include a first reinforcing portion 231 and a second reinforcing portion 232 that are perpendicular to each other and connected. The first reinforcing portion 231 may be connected to the third connecting body 221 and the top frame (second frame 110) of the door frame, and the fourth connecting body 222 may be disposed on the side frame (second frame 110) of the door frame. The door frame (first frame 120) is connected to the fourth connecting body 222 and is capable of rotating relative to the door frame to open and close the door.

[0172] like Figure 20 As shown, the cabinet door assembly may also include a wiring device 224 and a wiring channel 223. The wiring device 224 is disposed on the second connecting component 22, and the wiring channel 223 may be disposed on the wiring device 224. The wiring channel 223 is used to install external circuits. After the external circuits are introduced, they are connected to the heating wires, lighting components, etc. inside the cabinet door assembly through the wiring device 224 to supply power.

[0173] In some embodiments, the cabinet door assembly includes a door body 20, which may include one or more of a vacuum glass panel, an insulated glass panel, and a laminated glass panel. In some embodiments, the insulated glass panel may include a single insulated glass panel and a double insulated glass panel, wherein a single insulated glass panel comprises two layers of glass, and a double insulated glass panel may comprise three layers of glass. In some embodiments, the insulated glass panel may be an internally suspended membrane insulated glass panel. Of course, the door body 20 may also be other panel structures, and may be transparent, opaque, or translucent.

[0174] In some embodiments, the door 20 may include one or more layers of glass, and the glass may include one or a combination of vacuum glass, insulated glass, single-pane glass, and laminated glass.

[0175] The freezer uses the frame components described in some or all of the above embodiments to form the cabinet door assembly. For the freezer body and other structures and control strategies used to achieve functions such as insulation and temperature control, existing solutions can be used, and will not be elaborated upon here.

[0176] The structure of the door frame 11 will be described in further detail below.

[0177] The door frame 11 may include multiple frames, and the frames of the door frame may include second frames 110. Multiple second frames 110 are connected end to end to form the door frame 11.

[0178] In some embodiments, the door frame 11 can be rectangular, and four second frame bodies 110 are connected end to end to form it.

[0179] In some embodiments, such as Figure 10 and Figure 11 As shown, the second frame 110 may include a second shell structure 110a and a third plate segment 111 connected to the second shell structure 110a.

[0180] The sixth plate 1001, the seventh plate 1002, the eighth plate 1003, and the ninth plate 1004 are connected to define a cavity S, and the portion of each plate forming the cavity S forms a shell structure. In other words, the shell structure may include the entire plate or a portion of the plates in the sixth plate 1001, the seventh plate 1002, the eighth plate 1003, and the ninth plate 1004. For ease of distinction, the shell structure of the second frame 110 is referred to as the second shell structure 110a. It should be noted that the second shell structure 110a, as well as the first shell structure 120a and the third shell structure 130a, are collectively referred to as shell structures unless otherwise specified.

[0181] exist Figure 11 In the illustrated embodiment, the third plate segment 111 is a portion of the eighth plate body 1003, meaning the eighth plate body 1003 includes the third plate segment 111 connected to the second shell structure 110a and a plate segment connected to the third plate segment 111 and opposite to the ninth plate body 1004 along a third direction C. In this embodiment, the eighth plate body 1003 is integrally formed as a flat plate.

[0182] In some embodiments of this application, such as Figure 11 As shown, the second frame 110 may also include one or more inner plates 1005. Along a first direction A, the opposite end edges of the inner plates 1005 are respectively connected to two opposite plates 1000, wherein the first direction A is perpendicular to the extension direction and thickness direction of the inner plates. For ease of distinction, the two opposite plates along the first direction A are respectively referred to as the sixth plate 1001 and the seventh plate 1002. The extension direction of the inner plates 1005 and the sixth plate 1001 and seventh plate 1002 can also be referred to as the second direction B.

[0183] In some embodiments, such as Figure 8 and Figure 10 As shown, the second frame 110 is installed on the cabinet body of the freezer to form part of the door frame, such as a side frame formed in the door frame. The third panel 111 can be a part connected to the cabinet body, for example, it can be connected to the cabinet body by bolts or adhesive. It should be noted that the door frame includes a top frame, a bottom frame and a side frame (e.g., two side frames) that are opposite each other in the height direction Z.

[0184] Optionally, the second frame 110 forms the top frame of the door frame; alternatively, the second frame 110 forms the bottom frame of the door frame.

[0185] Optionally, hinges for connecting to the door frame are installed on the top and bottom frames respectively. Optionally, a hinge for connecting to the door frame is installed on the bottom frame, and the hinge may include a fixed lower hinge and an adjustable lower hinge. The adjustable lower hinge can adjust the door frame in four directions (left, right, up, and down) to ensure the sealing effect of the door frame. The hinge may also have a door frame pre-tightening function to achieve automatic door closing and sealing with the door seal. The freezer doors can be single doors, double doors, or multi-door doors.

[0186] Optionally, an inclined guide rail can be installed at the bottom of the door frame for the door frame to slide. When the door is closed, the door frame can slide automatically and automatically close and lock, that is, the refrigerator door is a sliding door. There is a locking device at the top of the door frame, which can be used to limit the opening of the sliding door and lock the open state.

[0187] In some embodiments, such as Figure 9 As shown, the door frame 11 may also include a buffer member 14. The buffer member 14 is located on the side of the first frame 110 away from the cavity. The buffer member extends from the second shell structure 110a to the first plate segment 1006a. The buffer member 50 may include a body 142 extending along the extension direction of the first plate segment 1006a and a protrusion 141 protruding from the body 142 in a direction away from the second shell structure 110a. When the door frame 11 is installed in the cabinet, the buffer member 14 can be positioned between the cabinet and the first plate segment 1006a, thereby providing a buffering effect and reducing damage caused by collisions between the cabinet and the first plate segment 1006a. The protrusion 141 further protects the first plate segment 1006a and the cabinet.

[0188] In some embodiments, the door frame 11 may further include a suction member 15, which can be used to engage with the seal 40 (described in detail below). The suction member 15 may be a sheet metal part, such as a sheet metal plate. The suction member 15 may be located on the side of the first plate 1006 opposite to the second plate 1007, and the suction member 15 may extend along the extending direction of the first plate 1006. The seal 40 may be located between the door frame 11 and the door frame 12, and the seal 40 and the suction member 15 may be engaged by magnetic attraction, for example, the seal 40 may have a magnetic strip. When the cabinet door is closed, the magnetic attraction between the seal 40 and the suction member 15 can seal the cabinet door, which helps to maintain the temperature inside the refrigerator.

[0189] In some embodiments, the door frame 11 may further include a first reinforcing member 16, which may be disposed on the side of the fourth plate 1009 opposite to the third plate 1008, and may extend along the extending direction of the third plate 1008. One side of the first reinforcing member 16 may be fitted onto the edge of the third plate 1008, and the other side of the first reinforcing member 16 may be connected to the suction member 15 to fix the suction member 15.

[0190] In some embodiments, the door frame 11 may further include a second reinforcing member 17, which may be located on the side of the first plate 1006 opposite to the second plate 1007, and the second reinforcing member 17 extends along the extending direction of the first plate 1006.

[0191] In some embodiments, the second reinforcing member 17 may be located between the suction member 15 and the first plate 1006, and the second reinforcing member 17 may extend along the extending direction of the first plate 1006. The second reinforcing member 17 can both support the suction member 15 and buffer the suction member 15 and the first plate 1006. Specifically, during the closing process of the cabinet door, the sealing member 40 and the suction member 15 interact with each other through magnetic attraction, and the force may impact the first plate 1006. The provision of the second reinforcing member 17 can reduce the impact of such force on the first plate 1006 and can protect the first plate 1006.

[0192] In some embodiments, the second reinforcing member 17 may form one or more bends, which may form a receiving groove that opens in a direction away from the first plate 1006. The receiving groove may be used to place heating elements such as heating wires.

[0193] In some embodiments, such as Figure 3 , Figure 5 , Figure 7 , Figure 9As shown, the eighth panel 1003 may further include a fourth panel segment 112, which is connected to the third panel segment 111. That is, the second shell structure 110a and the fourth panel segment 112 are respectively connected to both ends of the third panel segment 111. Furthermore, along the third direction C (i.e., the thickness direction of the third panel segment 111), the second shell structure 110a is located on one side relative to the third panel segment 111, and the fourth panel segment 112 is located on the other side. Both the third panel segment 111 and the fourth panel segment 112 are used to connect to the freezer, and the second shell structure 110a is used to connect to the door frame. Additionally, when installed in the freezer cabinet, along the thickness direction Y (depth direction) of the freezer, the second shell structure 110a is positioned further inside the freezer than the fourth panel segment 112; that is, the fourth panel segment 112 is positioned further outward than the second shell structure 110a. Therefore, when installed in the freezer cabinet, the cabinet can support the second frame 110.

[0194] In some embodiments, the fourth panel segment 112 is installed on the surface of the cabinet body along the thickness direction Y facing the cabinet door, and the portion of the fourth panel segment 112 overlapping the cabinet body along the thickness direction Y is generally 3 cm to 8 cm. The shape of the fourth panel segment 112 can be adapted to the outer edge of the cabinet body.

[0195] In some embodiments of this application, a sealant, a heat insulation pad, etc., may be provided between the third plate segment 111 and the cabinet. A sealant, a heat insulation pad, etc., may also be provided between the fourth plate segment 112 and the cabinet.

[0196] In some embodiments, functional components, such as indicator lights with prompting functions, temperature displays, etc., may be provided in the fourth plate segment 112.

[0197] In some embodiments, such as Figure 12 As shown, the door frame assembly may further include an intermediate frame 130 connected to the second frame 110. Optionally, the intermediate frame 130 extends along the height direction Z of the freezer and is connected to the door frame. Specifically, the two ends of the intermediate frame 130 are connected to the top frame and the bottom frame, respectively. In this case, the intermediate frame 130 may also be referred to as a support column. The intermediate frame 130 may be located at the center of the second frame 110 along the length direction X.

[0198] Optionally, the number of intermediate frames 130 can be one, two, or more.

[0199] like Figure 8 , 9 As shown in Figure 10, the main body of the intermediate frame 130 is formed as a hollow tubular shell structure (third tubular shell structure 130a), and the tubular shell structure (third tubular shell structure 130a) encloses the cavity S and has a closed annular cross-section.

[0200] The cross-section of the middle frame 130 is roughly rectangular.

[0201] In some embodiments, such as Figure 7 and Figure 8 As shown, the middle frame 130 is used to cooperate with the door frame to achieve the closed state.

[0202] In some embodiments, the intermediate frame 130 and the second frame 110 can be connected by a mortise and tenon joint. In other embodiments, the intermediate frame 130 and the second frame 110 can be connected by a connecting component.

[0203] In some embodiments, such as Figure 9 As shown, the intermediate frame 130 may include a first sub-frame 131 and a second sub-frame 132. The first sub-frame 131 may be located inside the second sub-frame 132. The first sub-frame 131 may include a frame body, which may include multiple connected plates. The connection of the multiple plates can define a cavity S, and the portion of each plate forming the cavity S forms a shell structure. For ease of distinction, the shell structure of the first sub-frame 131 is referred to as the third shell structure 130a.

[0204] The second sub-frame 132 may have a receiving groove and an opening communicating with the receiving groove, and the first sub-frame 131 is located within the receiving groove. Some plates of the first sub-frame 131 may fill the opening to enhance structural strength.

[0205] The second sub-frame 132 can be arranged around the three sides of the first sub-frame 131, that is, the cross-section of the second sub-frame 132 can be formed into a groove-shaped structure.

[0206] For example, when the door frame is installed on the freezer cabinet, the side of the second sub-frame 132 facing away from the door 20 along the thickness direction D has an opening. This arrangement helps to reduce the overall thickness of the intermediate frame 130, thereby reducing the thickness of the door assembly 1. Furthermore, since the side facing away from the door 20 is usually connected to the cabinet body, it is less likely to be subjected to external forces, thus reducing the impact on the strength of the intermediate frame 130.

[0207] In some embodiments, the first sub-frame 131 and the second sub-frame 132 can be detachably connected by snap-fit ​​or adhesive connection, or the first sub-frame 131 and the second sub-frame 132 can be formed as one unit.

[0208] In some embodiments, the third shell structure 130a of the first sub-frame 131 may include a pair of intermediate plates 1311 disposed along the length direction, and the intermediate plates 1311 may include intermediate plate segments 1312 extending along the thickness direction Y toward the door body 20.

[0209] In some embodiments, the plurality of frames constituting the intermediate frame 130 may further include a reinforcing frame 133, which may be located between the first sub-frame 131 and the second sub-frame 132 along the thickness direction Y. For example, the reinforcing frame 133 may be disposed on the side of the third shell structure 130a facing the door 20 along the thickness direction Y. The profile of the reinforcing frame 133 may be the same as the profile described above, and will not be repeated here.

[0210] In some embodiments, the reinforcing frame 133 may be located between a pair of intermediate plate segments 1312 along the length direction X, and the reinforcing frame 133 may contact the first sub-frame 131 and the second sub-frame 132 respectively.

[0211] In some embodiments, the reinforcing frame 133 may have one or more bending structures, thereby enhancing the structural strength of the intermediate frame 130.

[0212] In some embodiments, such as Figure 10 As shown, the door frame assembly also includes at least one first connecting component 21. The first connecting component 21 includes a first connecting body 211 and a second connecting body 212 connected together. The first connecting body 21 is inserted into the second frame 110, and the second connecting body 212 is inserted into the cavity S of the intermediate frame 130 and connected to the shell structure (third shell structure 130a).

[0213] In a specific embodiment, such as Figure 10 As shown, the intermediate frame 130 and the second frame 110 are connected by a first connecting assembly 21. A portion of the first connecting assembly 21 can extend into the cavity S of the intermediate frame 130, and another portion of the first connecting assembly 21 can be connected to the top frame and / or the bottom frame, specifically, connected (e.g., threaded) to the tubular structure 110a of the second frame 110, which serves as the top or bottom frame. Figure 10 As shown, the first connecting component 21 may include a first connecting body 211 and a second connecting body 212 connected to each other. The first connecting body 211 penetrates the shell structure 110a of the second frame 110. The first connecting body 211 can be connected to the shell structure 110a or to the cabinet of the freezer. The shape of the second connecting body 212 is generally consistent with the shape of the closed cross section of the intermediate frame 130. The second connecting body 212 extends into the cavity S of the intermediate frame 130 and cooperates with and connects to each plate of the shell structure (third shell structure 130a).

[0214] The freezer uses the frame components described in some or all of the above embodiments to form the cabinet door assembly. For the freezer body and other structures and control strategies used to achieve functions such as insulation and temperature control, existing solutions can be used, and will not be elaborated upon here.

[0215] Table 4 below shows the condensation situation of the freezer according to the embodiment of this application when the internal operating temperature is 5℃-7℃. The anti-condensation heating wire was not turned on. Table 3 shows the climatic conditions for the humidity test.

[0216] Table 4: The door frame of this application embodiment, under conditions without anti-condensation heating wire, has a minimum dew point temperature of 10.2°C when used in refrigerated conditions of 5°C-7°C, and can be applied in the following environments.

[0217] Humidity %RH 68 53 47 42 39 35 29

[0218] Table 5: Minimum anti-condensation power (W) of cabinet door assemblies and aluminum alloy cabinet door assemblies in the same refrigeration application according to embodiments of this application.

[0219]

[0220] Table 6: Minimum anti-condensation power (W) of cabinet door assembly and aluminum alloy door frame in refrigeration applications according to embodiments of this application.

[0221]

[0222] As shown in Table 4, under the condition of refrigeration application with an internal operating temperature of 5℃-7℃, the extreme operating temperature without turning on the anti-condensation heating wire is 25℃ and the relative humidity is 39%RH.

[0223] As shown in Table 5, the minimum anti-condensation power (W) of the cabinet door assembly and aluminum alloy cabinet door assembly under the same refrigeration application in the embodiments of this application is compared. The comprehensive energy saving of the door frame of this application under various working conditions is greater than 50%.

[0224] As shown in Table 6, the minimum anti-condensation power (W) of the cabinet door assembly and aluminum alloy cabinet door assembly under the same refrigeration application in the embodiments of this application is compared. The comprehensive energy saving of the door frame of this application under various working conditions is greater than 50%.

[0225] Table 7: Applicable climate conditions for the cabinet door assembly and aluminum alloy cabinet door assembly without opening the anti-condensation heating wire in the embodiments of this application.

[0226]

[0227] As shown in Table 7, the cabinet door assembly of this application embodiment can pass the test even without turning on the heating wire. In some embodiments, the cabinet door assembly provided by this application may not have a heating wire, thereby reducing the time required for the cabinet door assembly to achieve the insulation effect and lowering the manufacturing cost of the cabinet door assembly. Furthermore, omitting the heating wire can further reduce energy consumption and improve energy-saving performance.

[0228] The frame in this embodiment can be manufactured using the following molding method. The molding method for the frame component may include the following steps:

[0229] S11: Allow the fiber material to enter the preforming mold for preforming to become a preformed body; for example, allow the fiber yarn to pass through the yarn guide plate for preforming to become a preformed body.

[0230] S12: The preform and the fiber reinforcement layer are fused together in the molding mold to form a molded body, wherein the molded body includes at least one fiber resin composite material layer and at least one fiber reinforcement layer, and the fiber resin composite material layer and the fiber reinforcement layer are stacked.

[0231] S13: After the resin material is thoroughly mixed, it is injected into the molding mold through a high-pressure machine. For example, two resin materials (e.g., aromatic polyurethane resin and aliphatic polyurethane resin) can be mixed in a certain proportion according to process requirements and then injected into the molding mold under high pressure to fully fuse with the molded body.

[0232] S14: Extrusion heating curing of the molded body at a temperature of 80 degrees Celsius to 200 degrees Celsius; this step can be performed inside the mold.

[0233] S15: The cured molded body is pulled out by a traction machine to form a frame, wherein the frame includes a frame body, and the frame body includes multiple connected plates that define cavities.

[0234] For example, the profile can be pulled out at a uniform traction speed of 20-150 cm / min using a traction machine, and the clamping pressure can be controlled at 3-12T.

[0235] S16: Inject foamed porous filler into the cavity. The foam density of the foamed porous filler ranges from 3.0 to 10.0 kg / m³. 3 By injecting foamed porous filler into the cavity, it can effectively prevent the transfer of cold energy.

[0236] Among them, relative to the unit weight of the frame, the fiber resin composite material layer includes 65%-85% fiber material and 10%-18% resin material by weight, the fiber reinforcement layer has a weight ratio of 3%-10%, and the foamed porous filler has a weight ratio of 0.5%-5%.

[0237] Figure 16 This is a schematic flow diagram of a frame pultrusion molding process for forming a composite frame with cavities, provided for some embodiments of this application. The process comprises multiple consecutive stages, each playing a crucial role in the molding of the composite frame assembly. Figure 16 The components of the label include: fiber 200 from the yarn frame,

[0238] The components include fibers 200 from the yarn rack, a yarn guide plate 202, a pre-forming fixture 204, a glue injection box 206, a forming mold and heater 208, a traction mechanism 210, a rotation direction D, a displacement direction 214, and the finally formed hollow frame 100. These components and their roles in the process will be described in detail below.

[0239] Fibers 200 from the yarn register serve as the initial input material for the pultrusion process. The register acts as a container and feeder for continuous fibers (such as glass fiber, basalt fiber, or carbon fiber), which can form the structural layers of the composite frame assembly. After being drawn from the register, the fibers are pulled into subsequent processing stages. The main function of the guide plate 202 is to guide the glass fibers into the preforming fixture according to a predetermined direction and position, ensuring uniform distribution of the glass fibers during pultrusion, thereby guaranteeing the quality and performance of the final product.

[0240] The preforming mold 204 forms the structural matrix of the composite profile. Different preforming molds are selected depending on the structure. The fiber reinforcement layer is bonded to the fiber preform in this process, and adjustments are made according to the specific process structure. In the injection box 206, the preform is pulled to the injection box by a traction machine after completion in the preforming mold. The resin material, according to the process requirements, is mixed evenly with the A and B components in a specific ratio and then injected into the molding mold under high pressure to completely fuse with the preform.

[0241] The molding die and heater 208 represent the core components of this molding process. The pultrusion die is configured with an internal cavity structure that defines the shape and size of the composite frame. The heater integrated with the pultrusion die ensures uniform resin curing as the fibers pass through it. Depending on the resin system used, the curing temperature can be maintained between 100°C and 180°C. Different resin systems can be selected based on the required performance of the composite frame assembly; for example, the resin material can include thermosetting or thermoplastic resins (such as polyurethane, epoxy, or polyetherimide). The cavity structure inside the pultrusion die is a key feature in forming the inner cavity of the composite frame, which can subsequently be filled with advanced filler materials to enhance thermal insulation performance.

[0242] The traction mechanism 210 is configured to pull the cured composite frame out of the pultrusion die. This mechanism ensures that the fibers maintain constant tension and alignment throughout the process. The rotation direction D indicates the direction of movement of the rollers, and the displacement direction 214 indicates the direction of movement of the traction machine, which helps to ensure continuous production of the composite frame. This traction mechanism helps maintain the dimensional accuracy and surface finish of the final product.

[0243] The final hollow frame 100 is the final output of the pultrusion process. This frame employs a multi-layered composite structure with an internal cavity. The outer layer may contain a fiber-resin composite material providing mechanical strength and durability; the middle layer enhances impact resistance and dimensional stability; and the inner layer provides thermal insulation. The cavity can be selectively filled with a hybrid filler material (such as closed-cell foam incorporating aerogel particles) to achieve superior thermal insulation performance.

[0244] Figure 17 The assembly process of the freezer door assembly is demonstrated, detailing multiple steps such as profile cutting, corner splicing, and glass clamping. This assembly process is presented in flowchart form, with each step collectively constructing a composite frame assembly with high thermal insulation and modular characteristics. Figure 17 The process flow will be described in detail below.

[0245] Process flow 300 provides a sequential process flow for assembling the composite frame. Each step can be configured to improve assembly accuracy, structural integrity, and thermal insulation performance. The process begins with profile cutting 302, which trims the composite frame profiles to specified dimensions. This step ensures that the profile dimensions meet subsequent assembly requirements, reducing material waste and guaranteeing compatibility with other components. Depending on production scale and requirements, the cutting process can be performed using automated equipment or manual tools.

[0246] Corner splicing 304 includes the use of corner brackets with injection molding to enhance adhesion, or the use of corner brackets (cast aluminum structure) with interference fit to achieve right-angle connections of the profiles. This step ensures a firm connection at the frame corners, thereby guaranteeing structural stability and alignment accuracy. According to design specifications, the splicing process can be selected from corner bracket injection molding, mechanical fasteners such as interference fit of cast aluminum corner brackets, or screw fixing of corner brackets to the frame.

[0247] Intermediate frame connection 306 is an optional step for integrating the central support structure (intermediate frame) or columns into the frame assembly. The intermediate frame provides additional rigidity and support, particularly suitable for large doors or multi-door structures. It can also serve as a mounting base for functional components, such as sealing mechanisms or heating assemblies. Integrated installation of the intermediate frame is achieved through a combination of precision alignment and robust fastening techniques.

[0248] Frame assembly 308 involves constructing a complete frame structure by connecting various profiles and components. This step ensures accurate positioning and secure connection of the frame, forming a complete and unified whole. The assembly process may include tool-free end-to-end connections using modular interlocking joints. This connection method significantly simplifies assembly and disassembly processes, providing convenience for maintenance and customization needs.

[0249] Glass clamping 310 secures the glass panel within the frame. This frame can be configured to accommodate various glass types, including single, double, or triple-layered glass, as well as vacuum-insulated or laminated glass. The clamping mechanism ensures the glass panel is firmly in place to provide insulation and structural stability. Clamping processes can include the use of gaskets, adhesives, or mechanical fasteners.

[0250] Sealing strip installation 312 applies a waterproof seal to the frame edges. The sealing strip is embedded in a special groove within the frame to ensure an airtight seal. This step improves the refrigerator's insulation performance by reducing energy loss and preventing the intrusion of moisture or contaminants. The sealing strip can be made of silicone, EPDM (Ethylene Propylene Diene Monomer), or thermoplastic elastomers; these materials are chosen based on their durability and flexibility.

[0251] Hinges and locks 314 are used to assemble the functional hardware required for cabinet door operation. Hinges can be mounted on the frame to allow for smooth pivoting movement, while locks ensure the cabinet door is securely locked when closed. These hardware components are designed to be seamlessly integrated with the frame to ensure operational reliability and ease of use. Installation processes may involve the use of pre-drilled holes or adjustable mounting brackets to accommodate different hardware configurations.

[0252] Electrical wiring 316 for lighting and heating systems includes connecting lighting or heating components to corresponding circuits. Using dedicated channels within the frame ensures a neat and organized wiring layout. Lighting components such as LED light strips provide illumination inside the freezer, while heating elements prevent condensation on the glass panel. The wiring process includes securing the connection terminals and testing the functionality of each component.

[0253] Figure 18 The integration of an anti-condensation heating system in the composite frame assembly of the freezer door assembly is shown. Figure 18 Detailed cross-sectional views of the frame channel configuration are provided, highlighting the heater channel, the wires extending to the wiring channel, and the relative positioning of the connecting parts and the sealing groove. This configuration demonstrates the integrated structure and power wiring method of the anti-condensation heating system, a design that helps maintain energy efficiency and reduce condensation on the inner surface of the door.

[0254] The anti-condensation heating controller 400 is configured to regulate the operation of the heating element embedded within the composite frame assembly. This controller dynamically adjusts the power supplied to the heater based on environmental conditions such as temperature and humidity detected by the indoor temperature and humidity probe 402. The integration of this controller improves the energy efficiency of the heating element, minimizing energy consumption while maintaining effective anti-condensation performance.

[0255] An indoor temperature and humidity probe 402 is installed in the working environment of the freezer to detect real-time environmental changes. This probe is configured to detect temperature and humidity changes and provide real-time data to the anti-condensation heating controller 400. The system uses this data to adaptively manage heater operation, effectively reducing condensation while avoiding unnecessary energy consumption.

[0256] A frame probe 404 is positioned at the composite frame assembly to monitor its thermal performance. This probe is configured to detect temperature changes along the frame, ensuring the heating element maintains a uniform heat distribution. The data collected by the frame probe 404 can be used to optimize heater operation, contributing to improved overall system energy efficiency.

[0257] The schematic diagram 406 of the glass frame heating structure illustrates the arrangement of heating elements within the composite frame assembly. These heating elements (which may comprise wires or foil) are embedded within dedicated channels in the frame. This configuration helps to distribute heat evenly across the glass surface, reducing condensation and maintaining clear visibility. The integrated arrangement of the heating elements with the composite frame assembly also enhances the structural integrity and thermal insulation performance of the door.

[0258] The door 20 is illustrated as an application example of a composite frame component integrating an anti-condensation heating system. This door is designed to provide a thermal barrier between the interior and exterior environments of the freezer, while integrating heating and sealing mechanisms to enhance performance. The modular design of the door facilitates installation and maintenance, making it suitable for various freezer configurations.

[0259] The internal probe placement position 410 and the frame probe placement position 412 illustrate the arrangement of the temperature and humidity probes in the system. These positions are selected to enable precise monitoring of the environment and frame operating conditions, allowing the anti-condensation heating controller 400 to precisely adjust the operation of the heater.

[0260] Frame cross-section diagram 414 provides a detailed structural view of the composite frame, highlighting the integration of heating elements, wiring channels, and sealing grooves. This cross-section illustrates how the arrangement of components achieves effective thermal insulation, structural integrity, and energy efficiency optimization. The frame's modular interlocking design supports easy assembly and disassembly, facilitating maintenance and customization needs.

[0261] The cavity 416 is filled with polyurethane insulation material (the filler includes one or more of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, polypropylene foam, and silicone foam) to insulate against heat conduction. This insulation guides the wiring from the heating element to the anti-condensation heating controller 400. The channel is designed to protect the wiring from environmental factors and mechanical damage, helping to ensure the reliability of the heating system. The integration of the wiring channel with the composite frame assembly enhances the overall functionality and durability of the door. The frame sealing groove 418, formed by the frame segments, is configured to accommodate the sealing strip, providing an airtight seal and reducing energy loss. This frame sealing groove is designed to ensure a secure fit of the sealing strip, thereby enhancing the door's insulation performance. The integration of the sealing groove with the composite frame assembly helps improve the overall energy efficiency and performance of the freezer.

[0262] Traditional freezer door frames deform over time because repeated temperature cycles cause uneven expansion of metal components, while condensation accelerates corrosion at joints and weakens structural strength. Furthermore, the interface between traditional insulation foam and the door frame may delaminate, creating gaps and reducing insulation performance.

[0263] This implementation solution addresses the aforementioned technical deficiencies by employing a multi-layer fiber-resin composite material (combining carbon fiber reinforced glass fiber and a high-temperature resistant epoxy resin matrix) and integrating a set of in-situ filled closed-cell polyurethane foam sub-cavities. This composite material layer can directionally provide flexural stiffness and impact resistance, while the approximately 30 mm deep foam cavities achieve an effective thermal conductivity of ≤0.025 W / (m*K).

[0264] Because the foam can be directly injected into the composite material in a single molding cycle, bonding can be continuous and uninterrupted. This not only reduces delamination but also provides uniform thermal shielding protection along the circumference of the door. This integrated design simplifies the assembly process, reduces the number of fasteners, and lowers maintenance requirements, making it suitable for high-performance commercial and residential freezers.

[0265] Figure 19 This diagram illustrates a typical example of a fiber-reinforced composite configuration suitable for a frame. The figure presents the frame structure in cross-sectional view, comprising at least one layer of fiber-reinforced resin composite material and at least one layer of fiber reinforcement arranged in a stacked configuration. This overall layout provides a balance of stiffness, dimensional stability, and thermal performance for structural components such as refrigerator frames. This diagram is a summary illustration, emphasizing the relative positions of the layers rather than precise dimensions.

[0266] The fiber-resin composite layer 700 comprises unidirectionally arranged fibers embedded within a resin matrix. The fibers may be selected from glass fibers, basalt fibers, carbon fibers, or aramid fibers, and the matrix may be polyurethane or epoxy resin. This unidirectional arrangement can be configured to primarily bear loads along the longitudinal axis of the frame, thereby imparting high tensile and flexural strength to the material. The fiber-resin composite layer 700 may be configured adjacent to a fiber-reinforced layer to form a hybrid laminate.

[0267] The fiber-resin composite layer 704 comprises bidirectional or woven fibers interwoven in two mutually perpendicular directions. The woven structure can be composed of continuous rovings or stitched fabric, and the resin matrix binds the fibers together in a similar manner. This configuration disperses stress along the two principal axes, thereby increasing flexural modulus and reducing anisotropic deformation. This material layer can be disposed between unidirectional layers to provide transverse reinforcement.

[0268] The fiber-resin composite layer 706 comprises randomly oriented chopped fibers dispersed throughout the resin matrix. These chopped fibers can be short fibers or segmented fibers, with a length relatively short compared to the overall thickness of the component. This quasi-isotropic arrangement enhances impact resistance and suppresses multidirectional crack propagation. This material layer can be adjacent to layers with higher orientation to impart a degree of isotropy to the overall laminate.

[0269] The fiber-reinforced resin composite layer 702 has a grid pattern or truss-type reinforcing structure, wherein fibers are arranged to form an interconnected grid. The grid can be formed using weaving, knitting, or additive manufacturing techniques, resulting in a truss structure that provides high rigidity while maintaining low weight. This material layer can be used as an intermediate reinforcing layer between a unidirectional layer (fiber-reinforced resin composite layer 700) and a braided layer (fiber-reinforced resin composite layer 704) to improve buckling resistance.

[0270] The composite laminate 708 is formed by stacking multiple fiber-reinforced resin composite layers with fiber reinforcement layers in an alternating layup orientation. The layup sequence can be selected based on the target stiffness matrix, thermal conductivity, and thickness. Each continuous layer is bonded by a resin matrix, forming an integral structure resistant to delamination under service loads. The laminate can be customized by changing the number of repetitions of the layup pattern.

[0271] The fiber orientation of the fiber reinforcement layer 710 can be 0°. This orientation makes the fibers parallel to the longitudinal axis of the frame, thereby enhancing the axial load-bearing capacity. This layer can be disposed adjacent to the fiber-reinforced resin composite layer 700 to form a continuous load path through the laminate. This 0° orientation can also serve as a reference direction for subsequent angled layups.

[0272] The fiber orientation of fiber reinforcement layer 712 can be +45°, while the fiber orientation of fiber reinforcement layer 714 can be -45°. Such diagonal layups can be placed on either side of the central unidirectional layer or the braided layer to create a balanced shear load-bearing capacity. The ±45° layup orientation enables the laminate to resist torsional loads and shear stresses generated during door opening or thermal cycling. Each layup can be bonded to the surrounding resin matrix, ensuring load transfer between adjacent layers.

[0273] The fiber reinforcement layer 716 can have a fiber orientation of 90°, thereby providing lateral reinforcement perpendicular to the longitudinal axis of the frame. This layup improves dimensional stability in the width direction and suppresses out-of-plane deformation. When used as the outermost layup, this 90° orientation structure, in conjunction with the protective surface layer, also serves to prevent moisture intrusion.

[0274] In some implementations, the illustrated configuration can be combined with additional sub-components, such as porous fillers injected into the internal cavity, flame-retardant particles dispersed within the resin matrix, or embedded temperature sensors arranged through dedicated channels. Target mechanical properties (e.g., tensile strength in the range of 600-1200 MPa) and thermal conductivity in the range of 0.08-0.15 W / (m*K) can be achieved by adjusting the selection of fiber type, resin system, and layup sequence. The modular nature of this laminate allows it to be adapted to different door lengths, thicknesses, and performance requirements, while maintaining manufacturability through pultrusion or similar processes.

[0275] Figure 20 Various extruded cross-sectional profiles of door body profiles with different internal cavity arrangements are shown. Their design aims to improve thermal performance and structural stability.

[0276] Figure 20 A series of door profile extrusion cross-sectional profiles are shown, which demonstrate different internal cavity arrangements designed to optimize thermal performance and structural stiffness.

[0277] The single-cavity cross-section 600 includes a freestanding cavity region extending longitudinally along the extrusion direction. This cavity can be filled with low thermal conductivity foam (expanded porous filler), which can be injected after pultrusion molding to form a continuous thermal insulation barrier along the length of the frame. The outer panel may include a high-modulus fiber-resin layer that transfers bending loads to the outer surface, while the internal foam provides compressive support.

[0278] Single-cavity structure 602 exhibits the same hollow geometry as single-cavity structure 600, but employs an improved wall thickness distribution. In some embodiments, the outer panels can taper towards the center to reduce material usage, while the inner foam core layer remains uniform. This variation improves weight efficiency without significantly altering the heat transfer path provided by the foam filler material.

[0279] The mesh section 604 uses a thin rib network to divide the internal cavity into a series of rectangular units. The ribs can be made of the same fiber-resin composite material as the outer plate forming the cavity, creating a mesh structure that disperses mechanical stress across multiple load-bearing paths. Foam filler can fill each unit, increasing the heat transfer surface area to dissipate heat while maintaining the structural integrity.

[0280] The multi-cavity parallel partition section 606 employs a set of parallel wall structures to form slender cavities extending along the extrusion axis. Each cavity can be independently filled with foam, thereby achieving zoned control of the thermal conductivity along the frame direction. The parallel partitions also act as reinforcing ribs to resist torsional deformation, which is particularly effective in longer frame sections where linear bending moments dominate.

[0281] The honeycomb-like multi-cavity cross-section 608 presents a hexagonal cell array resembling a natural honeycomb. The cell walls, constructed of composite materials, provide high specific stiffness, while the foam material filling the hexagonal cavities blocks heat transfer. Because the honeycomb pattern effectively extends the heat conduction path, this geometry has the advantage of reducing the peak lateral thermal gradient of the frame.

[0282] In all illustrated cross-sections, the heat transfer path from the interior of the freezer to the external environment must sequentially pass through the composite outer panel, the foam filler, and any internal partition structures. In some embodiments, the foam may be a blend of polyurethane and aerogel particles, achieving a thermal conductivity range of 0.05 to 0.1 W / (m*K). The presence of internal ribs or partitions effectively improves the overall thermal resistance by forcing heat to detour through the solid walls rather than directly through the filler.

[0283] The structural stiffness of each section is affected by the material distribution. Single-cavity designs mainly rely on the external composite material outer wall to provide bending resistance, while grid partitioning and honeycomb structures improve the bending modulus by introducing internal load-bearing components. Multi-cavity parallel designs can enhance torsional stiffness by arranging rigid partitions along the main load direction, thereby reducing angular deformation under the action of door opening force.

[0284] The cross-sectional profile can be manufactured using a pultrusion process, which continuously forms the outer panel and internal ribs or partitions of the composite material. After the extruded profile has cured, controlled injection of foam filler can be performed in a vacuum environment to ensure complete filling of the cavity and tight bonding with the surrounding walls. This process can be adapted to different cavity geometries without changing the basic pultrusion die.

[0285] The modular nature of the frame profiles allows for the selection of appropriate cross-sections based on the specific door frame (or door body frame) length or performance requirements. For example, longer frame sections can utilize a honeycomb multi-cavity cross-section 608 to maximize stiffness while maintaining lightweight construction, while shorter sections can employ a single-cavity structure 602 for more economical production costs. These interchangeable designs can be connected end-to-end via tongue and groove joints, which align the internal cavities to ensure continuity of the foam filling.

[0286] Overall, the illustrated cross-sectional variations demonstrate how a balance can be achieved between insulation performance, mechanical strength, and manufacturability in refrigerator door frames and body frames through customized internal cavity structures. By selecting appropriate cross-sectional configurations, the system can reduce energy consumption, improve dimensional stability during temperature cycling, and simplify the assembly process without the need for separate insulation panels.

[0287] Figure 21 A cross-sectional view of a composite frame assembly for a refrigerator door is shown. The illustration depicts the following structure: an outer vertical frame 800 (frame) defining the overall geometry; a gradient porous foam core layer 802 (foamed porous filler) filling the internal cavity; a fiber-reinforced protective layer 804 covering the inner surface of the frame; integrated heating channels 806 and integrated lighting channels 808 arranged adjacent to each other along the inner periphery; and an interchangeable glass panel mounting structure 810 allowing for various glass panel configurations. This view shows the elements stacked from the outside in, illustrating how thermal insulation, structural protection, and functional services are integrated within a single modular unit.

[0288] The outer vertical frame 800 can be fabricated as a pultruded hollow component comprising a series of interconnected plates that collectively define a longitudinal cavity. In some embodiments, the frame can be made of a high-modulus fiber-resin composite material with a fiber weight fraction of 65% to 85% and a resin weight fraction of 10% to 18%. The outer surface of the frame can be coated with PVC (Polyvinylchloride) to improve grip and appearance. The geometry of the frame can include vertical web sections and horizontal flange sections, which provide alignment references for the mounting structure 810 and form routing channels for the heating channels 806.

[0289] A gradient porous foam core layer 802 can be injected into the defined cavity of the outer vertical frame 800 after it has been formed. The foam can be a dual-density polyurethane or silicone material, with a density distribution that is higher near the frame walls and decreases towards the center, thus establishing a thermal conductivity gradient. In some embodiments, specific gradient parameters can be selected to reduce heat flow to the internal glass panels while maintaining structural rigidity. The foam may also incorporate phase change material particles to provide additional thermal buffering during door opening cycles. This core layer 802 can act as the primary thermal insulation barrier between the internal environment of the cold storage room and the external environment.

[0290] A fiber-reinforced protective layer 804 may be disposed on the inner surface of the outer vertical frame 800. This layer may consist of a woven or nonwoven fabric made of glass fiber, basalt fiber, carbon fiber, or aramid fiber, impregnated with polyurethane or epoxy resin. In some embodiments, this protective layer may form a barrier layer, limiting the contact of the underlying composite fibers with abrasion and moisture, thereby improving durability. The protective layer 804 can also provide overall stiffness reinforcement to the component by dispersing localized loads and can improve the adhesion of the foam core layer 802 during injection through surface texturing.

[0291] like Figure 21 As shown, the integrated heating channel 806 is located in the interlayer between the insulating glass and the profile, for example, it can be a channel formed by the aforementioned second reinforcement 17. Low-voltage heating wires or flexible printed heating films can be disposed within these channels and electrically connected to an external control circuit as shown. In some embodiments, the heating channel 806 can be designed to provide 5-15 watts / meter of heating power to the frame edge, thereby reducing condensation on adjacent glass panels during low-temperature operation. The channel can be thermally coupled to the foam core layer 802 to achieve heat localization and reduce energy consumption.

[0292] Within the outer vertical frame 800, this mounting structure can accommodate single-layer, double-layer, vacuum, or laminated glass panels without requiring a redesign of the frame geometry. In some embodiments, the mounting structure 810 may include sealing grooves for embedding sealing strip material to achieve an hermetic seal around the glass perimeter. The modular nature of the mounting structure 810 allows for quick replacement of glass panels for maintenance or product customization, and the design can be expanded to support interchangeable decorative inserts or sensor modules.

[0293] The synergistic effect between the outer vertical frame 800, the gradient porous foam core layer 802, the fiber-reinforced protective layer 804, and the heating channel 806 achieves a balance between thermal management and structural stability. Heat generated by the heating channel 806 is conducted to the foam core layer 802, whose gradient density characteristics maintain the glass panel surface temperature above the dew point while limiting heat loss to the surrounding environment. This integrated layout ensures minimized condensation, uniform lighting, and efficient transfer of mechanical loads to the frame 800.

[0294] Variations of this component may include alternative foam materials for the gradient porous foam core layer 802, including phenolic resin or expanded polystyrene, which can be selected to achieve different thermal conductivity ranges from 0.08 W / (m*K) to 0.22 W / (m*K). The heating channel 806 can be implemented as printed circuit traces embedded in a flexible polymer substrate, enabling flexible wiring and reducing structural height. When the frame may be exposed to higher temperatures, the fiber-reinforced protective layer 804 can be used in combination with a felt-type overlay or a high-temperature resistant coating. These alternatives can be combined without altering the basic geometry of the outer vertical frame 800.

[0295] The disclosed configuration produces several technical benefits: the gradient porous foam core layer 802 reduces the overall thermal conductivity of the door assembly, thereby improving the energy efficiency of the refrigerator; the integrated heating channel 806 prevents frost formation and maintains the visual clarity of the glass panel secured by the mounting structure 810, which is particularly advantageous for commercial display cases; the protective layer 804 enhances durability by shielding the composite frame from wear and moisture, while the modular mounting structure 810 enables rapid maintenance. Implementation considerations include ensuring adequate curing of the resin matrix within the frame 800.

[0296] In one specific embodiment, the fiber yarn (fiber material) can be pre-threaded into the pre-forming plate (pre-forming mold) according to the process requirements, and then enter the mold (forming mold). The mixed resin material is stirred evenly according to the process requirements and injected into the mold through a high pressure machine to fully integrate with the fiber yarn. The forming mold is heated and formed by high temperature (temperature range: 80℃~200℃) EM composite profile.

[0297] The formed profile is pulled out at a uniform speed by a traction machine (traction speed: 20~150cm / min) (clamping pressure controlled at 3-12T), and then cut by a cutting machine according to the process length; wherein, the fiber reinforcement layer has two opposite sides along the thickness direction, and a preform exists on at least one side of the fiber reinforcement layer; the cured preform and the fiber reinforcement layer are pultruded into a frame body, wherein the frame body includes multiple connected plates, and the multiple plates define cavities;

[0298] Foamed porous filler is injected into the cavity, wherein, relative to the unit weight of the frame, the fiber-reinforced resin material layer comprises 65%-85% fiber material and 10%-18% resin material by weight, the fiber reinforcement layer accounts for 3%-10% by weight, and the foamed porous filler accounts for 0.5%-5% by weight.

[0299] The resulting frame assembly, constructed by laminating fiber-reinforced resin material layers, fiber-reinforced composite material layers, and fiber-reinforced layers, possesses excellent tensile and bending strength. Even with long lengths, the frame is less prone to deformation, reducing the likelihood of poor sealing in the insulated cabinet or freezer due to deformation, thus improving its insulation performance. Furthermore, the interconnected cavities formed by multiple panels, filled with foamed porous filler, enhance the frame's thermal insulation properties, further improving the freezer's insulation performance. Moreover, the frame surface is smooth to the touch, without noticeable burrs. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application, are intended to cover non-exclusive inclusion.

[0300] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0301] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0302] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0303] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0304] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0305] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0306] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A door frame assembly for a freezer, characterized in that, Includes multiple frames, The frame includes a frame body and a foamed porous filler. The frame body includes multiple connected plates that define cavities, and the foamed porous filler fills the cavities. The board body comprises at least one layer of fiber-reinforced resin composite material and at least one layer of fiber reinforcement, wherein the fiber-reinforced resin composite material layer and the fiber reinforcement layer are stacked along the thickness direction of the board body, and the thickness of the board body is in the range of 1.5 mm to 3 mm. In at least one of the plurality of frames, the frame body includes a grip portion formed from a portion of the plate.

2. The door frame assembly according to claim 1, characterized in that, The multiple plates form a tubular shell structure with a closed annular cross-section. The plurality of plates includes a first plate, the first plate comprising a first plate segment and a second plate segment, the second plate segment being connected to the first plate segment and serving as part of the tubular shell structure, the first plate segment extending from the tubular shell structure, and the first plate segment and the tubular shell structure forming a door mounting portion. In the first plate body, at least the first plate segment is formed as a flat plate, and the length of the first plate segment extending relative to the shell structure is in the range of 3 mm to 6 mm.

3. The door frame assembly according to claim 2, characterized in that, The second plate segment is formed in the shape of a flat plate or an arc plate.

4. The door frame assembly according to claim 2, characterized in that, The gripping part includes a gripping plate segment and a connecting plate segment. The connecting plate segment is connected between the gripping plate segment and the shell structure, and there is a gap between the gripping plate segment and the shell structure.

5. The door frame assembly according to claim 4, characterized in that, The gripping plate segment is configured as a flat plate. Along the thickness direction of the first plate segment, the holding plate segment is located on the side of the first plate segment opposite to the shell structure, and there is a gap between the first plate segment and the holding plate segment.

6. The door frame assembly according to claim 4, characterized in that, The gripping plate segment is configured as a hollow tube. Along the thickness direction of the first plate segment, the gripping plate segment is located on the side of the first plate segment away from the tube shell structure, and there is a gap between the first plate segment and the gripping plate segment.

7. The door frame assembly according to claim 2, characterized in that, The frame body also includes a first connecting portion and a second connecting portion, which are respectively connected to the tubular shell structure. Along the thickness direction of the first plate segment, the first connecting portion and the second connecting portion are located on the side of the shell structure opposite to the first plate body. The door frame assembly further includes a fastener, which comprises a first part and a second part connected together, the first part engaging with the first connecting part and the second connecting part. Along the thickness direction of the first plate segment, the second portion is opposite to the first plate segment to form a door clamping structure.

8. The door frame assembly according to claim 7, characterized in that, The first connecting portion is provided with a first latching portion, and the second connecting portion is provided with a second latching portion. The first portion includes a first latching engagement portion and a second latching engagement portion. Both the first latching engagement portion and the second latching engagement portion are formed to include connected recesses and protrusions. The recessed portion of the first snap-fit ​​part engages with the first snap-fit ​​part, and the recessed portion of the second snap-fit ​​part engages with the second snap-fit ​​part. The protruding portions of the first snap-fit ​​part and the protruding portions of the second snap-fit ​​part respectively engage with the first snap-fit ​​part and the second snap-fit ​​part on the side of their respective tube shell structure.

9. The door frame assembly according to claim 7, characterized in that, The first part is formed to have a receiving groove, the opening of which is smaller than the side wall of the receiving groove. The receiving groove is used to receive a part of the sealing element, and the opening is used to lock the sealing element.

10. The frame component according to any one of claims 1 to 9, characterized in that, The thickness of the plate is in the range of 1.5 mm to 2.5 mm.

11. The door frame assembly according to any one of claims 1 to 9, characterized in that, The main body of the frame is a one-piece molded part. The foamed porous filler includes one or more of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, polypropylene foam, and silicone foam. Relative to the unit weight of the frame, the fiber-resin composite layer comprises 65%-85% fiber material and 10%-18% resin material by weight, the fiber reinforcement layer comprises 3%-10% by weight, and the foamed porous filler comprises 0.5%-5% by weight. The fiber material includes one of glass fiber, basalt fiber, carbon fiber, and aramid fiber. The resin material includes polyurethane resin; The fiber reinforcement layer includes one of glass fiber mat, polyester surface mat, carbon fiber mat, and basalt fiber mat.

12. The door frame assembly according to any one of claims 1 to 9, characterized in that, The straightness of the main frame body within 0.5 meters to 3 meters is less than or equal to 0.5‰; The straightness of the main frame body, ranging from 3 meters to 7 meters, is less than or equal to 1.0‰.

13. The door frame assembly according to any one of claims 1 to 9, characterized in that, The twist of the profiles in the main frame body, ranging from 0.5 meters to 3 meters, is less than or equal to 0.5‰. The torsion of the main frame body from 3 meters to 7 meters is less than or equal to 1.0‰.

14. The door frame assembly according to any one of claims 1 to 9, characterized in that, The exposed surface of the plate of the frame body includes the fiber reinforcement layer.

15. A cabinet door assembly for a freezer, characterized in that, include: Door frame assembly according to any one of claims 1 to 14; and A door frame, wherein the door frame assembly is connected to the door frame and configured to open and close relative to the door frame; and The door body is installed on the door frame.

16. The cabinet door assembly according to claim 15, characterized in that, The door body includes one or more of the following: vacuum glass panel, insulated glass panel, single-layer glass panel, and laminated glass.

17. The cabinet door assembly according to claim 16, characterized in that, The hollow glass panels include single hollow glass panels and double hollow glass panels.

18. The cabinet door assembly according to claim 17, characterized in that, The hollow glass panel includes an inner-suspended membrane hollow glass panel.

19. A freezer, characterized in that, It includes a cabinet body and a cabinet door assembly as described in any one of claims 15 to 18, the cabinet door assembly being mounted on the cabinet body.

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