An inner panel of an insulated box cover

Abstract

This utility model relates to the technical field of insulated boxes, and proposes an inner panel for an insulated box lid, including an insulating frame. A plate is disposed at the bottom of the inner side of the insulating frame. The plate has an arc-shaped structure with outward convexity and inward concavity. A first adhesive layer is coated on the inner side of the plate, and an insulation layer is connected to the inner side of the plate through the first adhesive layer. A second adhesive layer is coated on the outer side of the insulation layer, and the insulation layer is connected to the inner wall of the insulating frame through the second adhesive layer. An outer shell is disposed on the outer side of the insulating frame, and an assembly for fixing the insulating frame to the outer shell is disposed on the top of the insulating frame. This utility model, through the design of the arc-shaped plate, solves the problem that condensation water easily seeps into the sealing ring after being deposited in the insulated box lid, causing a reduction in insulation performance.

Description

Technical Field

[0001] This utility model relates to the field of insulating and heat-preserving box technology, specifically to an inner panel of an insulating and heat-preserving box cover. Background Technology

[0002] An insulated box, also known as a thermal box, refrigerator, cold storage box, or heat insulation box, is a container that uses insulating materials and structural design to slow down heat transfer between the inside and outside of the box. Its core purpose is to maintain the temperature (low or high temperature) of the items inside the box for a limited time without the need for external energy (such as electricity), thus isolating them from the external environment. The inner panel of the lid is the visible or functional surface structure inside the insulated box that comes into direct contact with the stored items (or the internal air environment). It is the first (and innermost) physical barrier preventing cold (or hot) air from escaping through the lid to the external environment. In a sealed state, it, together with the inner panels of the side walls of the box, forms a closed, insulated space.

[0003] A search revealed a Chinese patent (publication number: CN204642635U) that discloses "a cold chain insulated box, comprising a main body and a lid that cooperates with the main body. The main body has an upward-opening receiving cavity. An insulation layer and a refrigeration layer are sequentially arranged inwards on the main body. The space surrounded by the refrigeration layer forms a storage chamber, which is divided into multiple compartments. A groove is provided on the upper surface of the lid, and a temperature monitor is embedded in the groove. The temperature monitor includes a temperature acquisition unit, an A / D conversion unit, a central processing unit, a GSM unit, and a liquid crystal display unit that communicate sequentially. It also includes a power supply unit connected to the power input terminals of each unit and a button unit that communicates with the central processing unit. The temperature acquisition unit is located within the storage chamber."

[0004] The cover of the insulated box in this type of technical solution has a flat structure, and its inner panel is also a flat structure. This flat structure of the inner panel has certain technical defects:

[0005] First, the bottom surface of the flat plate is a flat structure. When water vapor forms condensation at the bottom edge of the flat plate, it can easily seep into the sealing ring, thereby reducing the sealing performance of the sealing ring and consequently reducing the heat insulation performance.

[0006] Second, the insulation layer of existing flat panels usually uses a single adhesive. In low-temperature environments, the bonding interface is prone to embrittlement and cracking (peel strength decreases by ≥60% at -20℃), which leads to the separation of the insulation layer from the substrate and the formation of thermal bridges, thus causing…

[0007] Third, the flat panel structure limits the thickness of the insulation layer. When the temperature difference between the inside and outside of the box is large, the heat loss rate increases significantly. Furthermore, when the box lid is closed, most of the impact force is applied to the frame. Traditional plastic frames do not have a reinforcing structure, which can easily lead to cracks in the outer frame.

[0008] In view of this, the present invention proposes an inner panel for an insulated and heat-preserving box cover. Summary of the Invention

[0009] This utility model proposes an inner panel for an insulated box cover, which solves the problem in the prior art where condensation water easily seeps into the sealing ring, causing a reduction in insulation performance.

[0010] To solve the above problems, the technical solution of this utility model is as follows:

[0011] An inner panel of an insulated box cover includes an insulating frame. A plate is provided at the bottom of the inner side of the insulating frame. The plate has an arc-shaped structure that is convex on the outside and concave on the inside. A first adhesive layer is coated on the inner side of the plate. An insulation layer is connected to the inner side of the plate through the first adhesive layer. A second adhesive layer is coated on the outer side of the insulation layer. The insulation layer is connected to the inner wall of the insulating frame through the second adhesive layer.

[0012] The outer side of the insulating frame is provided with a shell, and the top of the insulating frame is provided with an assembly for fixing the insulating frame to the shell.

[0013] Preferably, a sealing ring is fixedly connected to the outer edge of the bottom of the insulating frame, and a vacuum cavity is formed on the inner side of the insulating frame.

[0014] Preferably, the first adhesive layer is a polyurethane adhesive layer, and the second adhesive layer is a silicone rubber adhesive layer.

[0015] Preferably, the top wall of the insulating frame has an arc-shaped structure, and a plurality of reinforcing strips are fixedly connected to the top wall of the insulating frame, and the plurality of reinforcing strips are distributed in a ring on the top wall of the insulating frame.

[0016] Preferably, the inner side of the outer shell has an assembly groove that slides with the insulating frame, and the inner side of the assembly groove has a plurality of slots that correspond one-to-one with the reinforcing strips, and the plurality of reinforcing strips engage with the corresponding slots.

[0017] Preferably, the assembly includes an internally threaded sleeve fixedly connected to the top of the insulating frame, a mating groove that slides with the internally threaded sleeve on the inner side of the outer shell, a screw rod that penetrates the side wall of the outer shell and is rotatably connected to the inner side of the mating groove, the bottom end of the screw rod being threadedly engaged with the internally threaded sleeve, and a rotating cap being fixedly connected to the top end of the screw rod.

[0018] The working principle and beneficial effects of this utility model are as follows:

[0019] 1. The plate adopts an arc-shaped structure with an outward convex and inward concave shape. It uses gravity to guide the condensate to flow towards the center of the plate, avoiding water from flowing to the sealing ring area. The sealing ring has a built-in vacuum chamber, providing an additional heat insulation layer, which doubles the protection against moisture infiltration and sealing failure.

[0020] 2. The thermal insulation performance of the vacuum chamber reduces heat transfer, ensuring that the sealing ring remains elastic in low-temperature environments and avoiding expansion or contraction failure caused by condensation; the convex surface design of the arc-shaped plate acts as a "flow guide slope" to reduce the risk of water accumulation at the edges, making it suitable for high-humidity environments (such as cold chain transportation) and reducing temperature fluctuations inside the box.

[0021] 3. A dual-layer adhesive system is used. The first adhesive layer is a polyurethane adhesive (used at the interface between the panel and the insulation layer), and the second adhesive layer is a silicone rubber adhesive (used at the interface between the insulation layer and the insulation frame). Polyurethane maintains flexibility at low temperatures, and silicone rubber is resistant to ultra-low temperatures without embrittlement points. After curing, the polyurethane layer has a low thermal conductivity, ensuring that there are no thermal bridges between the insulation layer and the panel. The silicone rubber layer has strong adhesion to the plastic frame. This dual-material combination prevents interlayer separation caused by low-temperature embrittlement, avoids heat loss "hot spots," and ensures that the insulation layer does not crack under extreme temperature differences, thus reducing the heat loss rate.

[0022] 4. The curved plate increases the thickness of the insulation layer, while the top wall of the insulation frame adopts a curved structure and integrates reinforcing strips. The reinforcing strips are distributed at equal angles to form a "skeleton support", which improves the bending stiffness. The curved top wall absorbs the closing impact force and prevents the frame from cracking.

[0023] 5. The assembly includes an internal threaded sleeve and a screw, which, combined with the pre-positioning design of the slot and reinforcing strip, enables quick sliding assembly; the slot and reinforcing strip engage one by one to eliminate offset errors; the screw is fastened by a rotating cap to ensure a seamless fit between the insulating frame and the outer shell. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of the inner panel of an insulating and heat-preserving box cover according to an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional view of the insulating frame according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the insulating frame according to an embodiment of the present utility model;

[0028] Figure 4 This is a cross-sectional view of the outer shell of an embodiment of the present utility model;

[0029] Figure 5 for Figure 4 An enlarged structural diagram of part A.

[0030] In the diagram: 10. Insulating frame; 101. Plate; 102. First adhesive layer; 103. Thermal insulation layer; 104. Second adhesive layer; 105. Sealing ring; 106. Vacuum chamber; 107. Reinforcing strip; 108. Internal threaded sleeve; 20. Outer shell; 201. Assembly groove; 202. Slot; 203. Butt joint groove; 204. Screw; 205. Rotating cap. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0032] Examples, such as Figures 1 to 5 As shown, this embodiment proposes an inner panel of an insulated box cover, including an insulating frame 10. A plate 101 is provided at the bottom of the inner side of the insulating frame 10. The plate 101 has an arc-shaped structure with an outward convex and inward concave shape. A first adhesive layer 102 is coated on the inner side of the plate 101. An insulation layer 103 is connected to the inner side of the plate 101 through the first adhesive layer 102. A second adhesive layer 104 is coated on the outer side of the insulation layer 103. The insulation layer 103 is connected to the inner wall of the insulating frame 10 through the second adhesive layer 104. A sealing ring 105 is fixedly connected to the outer edge of the bottom of the insulating frame 10. A vacuum cavity 106 is opened on the inner side of the insulating frame 10. An outer shell 20 is provided on the outer side of the insulating frame 10. An assembly for fixing the insulating frame 10 and the outer shell 20 is provided on the top of the insulating frame 10.

[0033] The plate 101 has an arc-shaped structure that is convex on the outside and concave on the inside. This structure can increase the filling thickness of the insulation layer 103, significantly improving the insulation effect. At the same time, the vacuum cavity 106 has good heat insulation performance, which further improves the insulation effect.

[0034] The arc-shaped structure of plate 101 has a certain prestress, which can increase the rigidity of plate 101; it can also accommodate a larger area of ​​sealing ring 105, improving sealing reliability.

[0035] Because the bottom wall of the plate 101 is convex, when the lid is sealed, condensate or other liquids will flow to the center of the convex surface of the plate 101 under the action of gravity, thus avoiding the risk of leakage caused by condensate or other liquids flowing to the sealing ring 105 area.

[0036] Furthermore, the insulating frame 10 is a plastic frame, the first adhesive layer 102 is a polyurethane adhesive layer, and the second adhesive layer 104 is a silicone rubber adhesive layer.

[0037] Polyurethane adhesive can maintain good flexibility, impact resistance and bonding strength at low temperatures. After curing, polyurethane adhesive has a low thermal conductivity. When fused between the board 101 and the insulation layer 103, it can ensure that the overall insulation performance remains at its best.

[0038] Silicone rubber has good temperature resistance and remains flexible even at ultra-low temperatures without embrittlement. Silicone rubber itself has a low thermal conductivity and good adhesion to plastics, which is suitable for fixing the insulating frame 10 (insulating plastic frame). Therefore, the silicone rubber adhesive layer can not only ensure the connection stability between the insulation layer 103 and the insulating frame 10, but also ensure the overall insulation performance.

[0039] Furthermore, the top wall of the insulating frame 10 has an arc-shaped structure, and several reinforcing strips 107 are fixedly connected to the top wall of the insulating frame 10. The several reinforcing strips 107 are distributed in a ring on the top wall of the insulating frame 10.

[0040] The top wall of the insulating frame 10 is an arc-shaped structure, which can improve the rigidity of the insulating frame 10. The bending stiffness of the insulating frame 10 is further improved by setting the reinforcing strip 107 in a ring. This can avoid the problem of the center of the insulating frame 10 collapsing or deforming.

[0041] Furthermore, an assembly groove 201 is provided on the inner side of the outer shell 20 to slide with the insulating frame 10. Several slots 202 corresponding to the reinforcing strips 107 are provided on the inner side of the assembly groove 201, and several reinforcing strips 107 are engaged with the corresponding slots 202.

[0042] By engaging the reinforcing strip 107 with the corresponding slot 202, the fit between the outer shell 20 and the insulating frame 10 is made more stable, thus avoiding misalignment between the outer shell 20 and the insulating frame 10, which would lead to a longer assembly time and affect assembly efficiency.

[0043] Furthermore, the assembly includes an internally threaded sleeve 108 fixedly connected to the top of the insulating frame 10, and a mating groove 203 that slides with the internally threaded sleeve 108 on the inner side of the housing 20. A screw 204 that penetrates the side wall of the housing 20 is rotatably connected to the inner side of the mating groove 203. The bottom end of the screw 204 is threadedly engaged with the internally threaded sleeve 108, and a rotating cap 205 is fixedly connected to the top end of the screw 204.

[0044] By assembling the insulating frame 10 with the mounting groove 201 of the outer shell 20, the inner threaded sleeve 108 slides into the mating groove 203. Then, by rotating the rotating cap 205, the screw 204 rotates and engages with the inner threaded sleeve 108. This allows the insulating frame 10 and the outer shell 20 to fit tightly together and remain fixed. The mechanical thread engagement between the screw 204 and the inner threaded sleeve 108 ensures the stability of the insulating frame 10 and the outer shell 20.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An inner panel of an insulated box cover, comprising an insulating frame (10), characterized in that, The bottom of the inner side of the insulating frame (10) is provided with a plate (101). The plate (101) is an arc-shaped structure with an outward convex and inward concave shape. The inner side of the plate (101) is coated with a first adhesive layer (102). The inner side of the plate (101) is connected to a heat insulation layer (103) through the first adhesive layer (102). The outer side of the heat insulation layer (103) is coated with a second adhesive layer (104). The heat insulation layer (103) is connected to the inner wall of the insulating frame (10) through the second adhesive layer (104). The outer side of the insulating frame (10) is provided with a shell (20), and the top of the insulating frame (10) is provided with an assembly for fixing the insulating frame (10) and the shell (20).

2. The inner panel of an insulated box cover according to claim 1, characterized in that, A sealing ring (105) is fixedly connected to the outer edge of the bottom of the insulating frame (10), and a vacuum cavity (106) is opened on the inner side of the insulating frame (10).

3. The inner panel of an insulated box cover according to claim 1, characterized in that, The first adhesive layer (102) is a polyurethane adhesive layer, and the second adhesive layer (104) is a silicone rubber adhesive layer.

4. The inner panel of an insulated box cover according to claim 1, characterized in that, The top wall of the insulating frame (10) is an arc-shaped structure, and a number of reinforcing strips (107) are fixedly connected to the top wall of the insulating frame (10). The number of reinforcing strips (107) are distributed in a ring on the top wall of the insulating frame (10).

5. The inner panel of an insulated box cover according to claim 4, characterized in that, The inner side of the outer shell (20) is provided with an assembly groove (201) that slides with the insulating frame (10). The inner side of the assembly groove (201) is provided with a plurality of slots (202) that correspond one-to-one with the reinforcing strips (107). The plurality of reinforcing strips (107) are engaged with the corresponding slots (202).

6. The inner panel of an insulated box cover according to claim 5, characterized in that, The assembly includes an internally threaded sleeve (108) fixedly connected to the top of the insulating frame (10). The inner side of the outer shell (20) is provided with a mating groove (203) that slides with the internally threaded sleeve (108). The inner side of the mating groove (203) is rotatably connected with a screw (204) that passes through the side wall of the outer shell (20). The bottom end of the screw (204) is threadedly engaged with the internally threaded sleeve (108). The top end of the screw (204) is fixedly connected with a rotating cap (205).

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