Cold region heat preservation door body structure

Abstract

The utility model discloses a cold region heat preservation door body structure, belongs to the technical field of heat preservation door bodies, and aims to solve the problems that an existing heat preservation door body is too single in heat preservation structure, and the heat preservation performance is prone to being weakened when the door body is in a low-temperature environment for a long time. One end of the heat preservation plate outer frame is fixedly connected with the outer side panel, the other end of the heat preservation plate outer frame is detachably connected with the inner side panel, and a supporting reinforcing layer, a reflecting layer, a main heat insulation layer, an auxiliary heat insulation layer, an anti-cracking layer and a phase change material layer are sequentially arranged in the heat preservation plate outer frame in the thickness direction of the door body structure from outside to inside. Every two adjacent layers of the supporting and reinforcing layer, the reflecting layer, the main heat insulation layer, the auxiliary heat insulation layer, the anti-cracking layer and the phase-change material layer are tightly attached, the supporting and reinforcing layer is fixedly bonded with the inner side of the outer side panel, and the phase-change material layer is fixedly bonded with the outer side of the inner side panel.

Description

Technical Field

[0001] This utility model belongs to the field of thermal insulation door technology, specifically relating to a thermal insulation door structure for cold regions. Background Technology

[0002] In the construction industry, insulated doors are widely used at the entrances of various buildings. Their main function is to reduce the exchange of heat between indoors and outdoors, thereby maintaining the indoor temperature environment and achieving energy conservation. Existing insulated doors typically adopt a multi-layer structure design, generally including an outer door panel, an inner door panel, and an insulation filling layer located between the two door panels. A utility model patent with patent application number CN202022603107.9, entitled "An Insulated Door for Entrances," discloses an insulated door structure. The core of this design involves placing a polyurethane insulation board between two wooden door panels, and simultaneously fitting a thermally broken aluminum frame to the outside of the insulated door structure. The combination of the thermally broken aluminum frame and the polyurethane insulation board allows the entrance door to achieve the technical requirements for passive door insulation. However, this structure has certain drawbacks in practical applications. First, since both the inner and outer panels are made of wood, their mechanical strength and impact resistance are limited. Second, its internal insulation structure is too simple and cannot effectively resist prolonged exposure to low temperatures. In low-temperature environments, the insulation layer has poor resistance to deformation and is prone to cracking, which not only affects the normal use of the door but also further damages the insulation structure, causing a sharp deterioration in insulation performance. Therefore, developing a cold-weather insulated door structure based on the shortcomings of existing technology is in line with practical needs. Utility Model Content

[0003] This utility model aims to solve the problem that the existing insulation structure of insulated doors is too simple and its insulation performance is easily weakened when exposed to low temperature environment for a long time, and thus provides a cold-region insulated door structure.

[0004] A cold-region insulated door structure, the door structure includes an inner panel and an outer panel, and a central insulation board is provided between the inner panel and the outer panel;

[0005] The central insulation board includes an outer frame, one end of which is fixedly connected to the outer panel, and the other end of which is detachably connected to the inner panel. The inner side of the outer frame is provided with a support and reinforcement layer, a reflective layer, a main insulation layer, an auxiliary insulation layer, a crack-resistant layer, and a phase change material layer in sequence from the outside to the inside along the thickness direction of the door structure. Adjacent layers are tightly bonded together. The support and reinforcement layer is bonded and fixed to the inner side of the outer panel, and the phase change material layer is bonded and fixed to the outer side of the inner panel.

[0006] Furthermore, aerogel felt is filled between the outer frame of the insulation board and the supporting reinforcement layer, reflective layer, main insulation layer, auxiliary insulation layer, crack-resistant layer and phase change material layer.

[0007] Furthermore, at least one sealing groove is machined on the outer ring surface of the insulation board frame, and a sealing ring is embedded in each sealing groove;

[0008] Furthermore, the sealing ring has a hollow structure, and its cavity is filled with aerogel felt strips;

[0009] Furthermore, the supporting reinforcement layer is a fluorocarbon-coated steel plate with a thickness of 1-1.2 mm;

[0010] Furthermore, the reflective layer is a reflective aluminum foil with a thickness of 0.1~0.15mm;

[0011] Furthermore, the main insulation layer is a vacuum insulation board with a thickness of 12~15mm;

[0012] Furthermore, the auxiliary insulation layer is an extruded polystyrene board with a thickness of 20~25mm;

[0013] Furthermore, the crack-resistant layer is basalt fiber cloth, and the thickness of the basalt fiber cloth is 4~8mm;

[0014] Furthermore, the phase change material layer is a paraffin / expanded graphite composite material plate with a thickness of 4~8mm;

[0015] The beneficial effects of this application compared to the prior art are:

[0016] This application provides a composite door structure design for cold-weather insulated doors. A support and reinforcement layer is located near the outer side, made of fluorocarbon-coated steel plate. This layer increases the support strength of the outer panel, improving the mechanical strength and impact resistance of the door structure. It also enhances the corrosion resistance of the outer side of the door structure, ensuring that damage to the outer panel does not affect the performance of the insulation panel. Furthermore, the insulation panel utilizes multiple layers of insulation material, employing reflective aluminum foil to block radiant heat from the interior. The core is constructed using a vacuum insulation board and a paraffin / expanded graphite composite material board. The insulation utilizes an intermediate insulation layer combining vacuum insulation panels and phase change energy storage materials, along with aerogel felt as the frame insulation layer. This effectively prevents heat transfer from both the door body and the frame. The phase change energy storage material can also dynamically regulate the temperature. Compared to traditional insulated doors, the insulation effect is significantly improved in cold regions, greatly reducing indoor heat loss and saving heating energy. The extruded polystyrene board and basalt fiber cloth located between the vacuum insulation panel and the paraffin / expanded graphite composite board not only provide auxiliary insulation but also further improve the compressive strength and crack resistance of the insulation board structure, effectively ensuring the working stability of the insulated door structure in low-temperature environments. Attached Figure Description

[0017] Figure 1 This is an internal view of the insulated door structure described in this application;

[0018] Figure 2 This is an external view schematic diagram of the insulated door structure described in this application;

[0019] Figure 3 This is a side view of the insulated door structure described in this application (with a sealing ring installed).

[0020] Figure 4 This is a side view of the insulated door structure described in this application (without the sealing ring installed).

[0021] Figure 5 This is a schematic diagram of the end face of the sealing ring in the insulated door structure described in this application;

[0022] Figure 6 for Figure 1 aa direction view;

[0023] Figure 7 for Figure 5 A magnified view of point A in the image;

[0024] Figure 8 for Figure 6 A magnified view of point B in the image. Detailed Implementation

[0025] Specific implementation method one: Combining Figures 1 to 8This embodiment describes a cold-region insulated door structure, which includes an inner panel 1 and an outer panel 3, with a central insulation board between the inner panel 1 and the outer panel 3.

[0026] The middle insulation board includes an insulation board outer frame 2. One end of the insulation board outer frame 2 is fixedly connected to the outer panel 3, and the other end of the insulation board outer frame 2 is detachably connected to the inner panel 1. The interior of the insulation board outer frame 2 is provided with a support and reinforcement layer 7, a reflective layer 8, a main heat insulation layer 9, an auxiliary heat insulation layer 10, a crack-resistant layer 11, and a phase change material layer 12 in sequence from the outside to the inside along the thickness direction of the door structure. The support and reinforcement layer 7, the reflective layer 8, the main heat insulation layer 9, the auxiliary heat insulation layer 10, the crack-resistant layer 11, and the phase change material layer 12 are tightly bonded to each other. The support and reinforcement layer 7 is bonded and fixed to the inner side of the outer panel 3, and the phase change material layer 12 is bonded and fixed to the outer side of the inner panel 1.

[0027] The supporting reinforcement layer 7 is a fluorocarbon-coated steel plate with a thickness of 1-1.2 mm.

[0028] The reflective layer 8 is a reflective aluminum foil with a thickness of 0.1~0.15mm;

[0029] The main insulation layer 9 is a vacuum insulation board with a thickness of 12~15mm;

[0030] The auxiliary insulation layer 10 is an extruded polystyrene board with a thickness of 20~25mm;

[0031] The crack-resistant layer 11 is basalt fiber cloth with a thickness of 4~8mm;

[0032] The phase change material layer 12 is a paraffin / expanded graphite composite material plate with a thickness of 4~8mm.

[0033] This embodiment provides a cold-weather insulated door structure. The inner panel 1 is made of antibacterial and mildew-resistant decorative panel, typically 5-8mm thick. The outer panel 3 is made of low-temperature resistant alloy plate, specifically aluminum alloy plate, typically 2-4mm thick. The outer frame 2 of the insulation board is made of thermally broken aluminum frame. Multiple positioning connecting blocks are welded inside the thermally broken aluminum frame, and these blocks are located on the side of the thermally broken aluminum frame facing the inner panel 1, with each block located at the edge of the frame. Each positioning connecting block has a threaded hole. Multiple stepped through holes 1-1 are machined at the edge of the inner panel 1, and each stepped through hole 1-1 is coaxially corresponding to a threaded hole on a positioning connecting block. Each connecting bolt 13 passes through a stepped through hole 1-1 and is inserted into the corresponding threaded hole, threadedly connecting to the corresponding positioning connecting block. The outer frame 2 of the insulation board is thus connected via multiple... Connecting bolt 13 enables detachable connection with the inner panel 1. Fluorocarbon-coated steel plate in the middle insulation board improves the mechanical strength and impact resistance of the outer panel 3. Reflective aluminum foil blocks indoor radiant heat. Core insulation is achieved through vacuum insulation board and paraffin / expanded graphite composite board. An intermediate insulation layer combining vacuum insulation board and phase change energy storage material, along with aerogel felt as the frame insulation layer, effectively prevents heat transfer from both the door body and the door frame. Compared with traditional insulated doors, the insulation effect is significantly improved in cold regions, greatly reducing indoor heat loss and saving heating energy. Extruded polystyrene board and basalt fiber cloth located between the vacuum insulation board and paraffin / expanded graphite composite board not only provide auxiliary insulation but also further improve the compressive strength and crack resistance of the insulation board structure, effectively ensuring the working stability of the insulated door structure in low-temperature environments.

[0034] Specific Implementation Method Two: Combining Figures 1 to 8 This embodiment further defines the specific embodiment one. Aerogel felt 6 is filled between the outer frame 2 of the insulation board and the supporting reinforcement layer 7, reflective layer 8, main insulation layer 9, auxiliary insulation layer 10, crack-resistant layer 11, and phase change material layer 12. Other components and connection methods are the same as in specific embodiment one.

[0035] In this embodiment, aerogel felt 6 is used as the frame insulation layer, which effectively prevents the transfer of cold energy from the door frame and improves the overall insulation performance of the door structure.

[0036] Specific implementation method three: Combining Figures 1 to 8 This embodiment further defines the first embodiment. At least one sealing groove 2-1 is machined on the outer ring surface of the insulation board outer frame 2. A sealing ring 4 is embedded in each sealing groove 2-1. The sealing ring 4 has a hollow structure, and its cavity is filled with aerogel felt strips 5. Other components and connection methods are the same as in the first embodiment.

[0037] In this embodiment, there are generally two sealing grooves 2-1 on the outer side of the insulation board frame 2. The two sealing rings 4 achieve multi-level sealing between the door frame and the door body, which can effectively prevent cold air from entering the room from the gap between the door body and the door frame. At the same time, by filling the sealing ring 4 with flexible aerogel felt strips 5, the sealing effect and heat insulation capacity of the sealing ring 4 are far superior to those of existing insulation doors, further ensuring the indoor temperature environment.

[0038] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

[0039] Working principle

[0040] The cold-weather insulated door structure provided in this application is assembled according to the connection relationship described in specific embodiments one to three. It is worth noting that mounting holes are reserved in the inner panel 1 and the outer panel 3 respectively for installing the inner door handle 14 and the outer door handle 15. At the same time, a hollow groove is processed at the corresponding position of the middle insulation board and the inner door handle 14 and the outer door handle 15. The inner wall of the hollow groove is reinforced by an aluminum alloy plate, and a connection hole is reserved at both ends of the hollow groove. The purpose of the hollow groove is to install the lock cylinder 16. The connection hole at both ends of the hollow groove is used to connect the lock cylinder 16 to the inner door handle 14 and the outer door handle 15.

[0041] The cold-weather insulated door structure provided in this application, when in use, firstly achieves a circumferential seal between the sealing ring 4 and the door frame structure, preventing cold air from entering the room through the gaps between the door frame and the door body. The door body adopts a multi-layer composite structure. When outdoor cold air moves from the outer panel 3 to the inner panel 1, it is blocked by the vacuum insulation board and extruded polystyrene board inside the insulation board. The paraffin / expanded graphite composite material board absorbs or releases latent heat through a phase change process to regulate the temperature. Basalt fiber cloth is used to protect the interior of the door structure, preventing the door structure composed of vacuum insulation board and paraffin / expanded graphite composite material board from cracking during long-term operation. The following is a performance comparison of traditional insulated doors (with a single polystyrene foam insulation board inside) and this application in actual use:

[0042]

[0043] Table 1

[0044] As shown in Table 1 above, the heat transfer coefficient, airtightness, and temperature difference between the inner and outer surfaces of the insulated door structure provided by this application are significantly better than those of traditional insulated door structures in practical applications. Furthermore, in a low-temperature environment (tested in a factory in a forest area in northeastern China, with an ambient temperature as low as -36℃, and tested from December to February for a total of 3 months), no cracks were found in the internal insulation board. The average daily condensation during the test was 5g, while the average daily condensation of traditional wooden doors under the same conditions exceeded 90g. During the test, the indoor temperature reached 22℃, and the inner surface temperature of the door was 18.5℃. Therefore, the technical solution provided by this application has good application effects and promising prospects in low-temperature and cold regions.

Claims

1. A cold-weather insulated door structure, the door structure comprising an inner panel (1) and an outer panel (3), characterized in that: A central insulation board is provided between the inner panel (1) and the outer panel (3); The middle insulation board includes an insulation board frame (2). One end of the insulation board frame (2) is fixedly connected to the outer panel (3), and the other end of the insulation board frame (2) is detachably connected to the inner panel (1). The interior of the insulation board frame (2) is provided with a support and reinforcement layer (7), a reflective layer (8), a main heat insulation layer (9), an auxiliary heat insulation layer (10), an anti-cracking layer (11), and a phase change material layer (12) in sequence from the outside to the inside along the thickness direction of the door structure. The adjacent layers of the support and reinforcement layer (7), the reflective layer (8), the main heat insulation layer (9), the auxiliary heat insulation layer (10), the anti-cracking layer (11), and the phase change material layer (12) are tightly bonded together. The support and reinforcement layer (7) is bonded and fixed to the inner side of the outer panel (3), and the phase change material layer (12) is bonded and fixed to the outer side of the inner panel (1).

2. The cold-weather insulation door structure according to claim 1, characterized in that: Aerogel felt (6) is filled between the outer frame (2) of the insulation board and the supporting reinforcement layer (7), the reflective layer (8), the main insulation layer (9), the auxiliary insulation layer (10), the crack-resistant layer (11) and the phase change material layer (12).

3. The cold-weather insulation door structure according to claim 2, characterized in that: At least one sealing groove (2-1) is machined on the outer ring surface of the insulation board frame (2), and a sealing ring (4) is embedded in each sealing groove (2-1).

4. The cold-weather insulation door structure according to claim 3, characterized in that: The sealing ring (4) is a hollow structure, and its cavity is filled with aerogel felt strips (5).

5. The cold-weather insulation door structure according to claim 4, characterized in that: The supporting and reinforcing layer (7) is a fluorocarbon-coated steel plate with a thickness of 1-1.2 mm.

6. The cold-weather insulation door structure according to claim 5, characterized in that: The reflective layer (8) is a reflective aluminum foil with a thickness of 0.1~0.15mm.

7. The cold-weather insulation door structure according to claim 6, characterized in that: The main insulation layer (9) is a vacuum insulation board with a thickness of 12~15mm.

8. The cold-weather insulation door structure according to claim 7, characterized in that: The auxiliary insulation layer (10) is an extruded polystyrene board with a thickness of 20~25mm.

9. The cold-weather insulation door structure according to claim 8, characterized in that: The crack-resistant layer (11) is basalt fiber cloth with a thickness of 4~8mm.

10. The cold-weather insulation door structure according to claim 9, characterized in that: The phase change material layer (12) is a paraffin / expanded graphite composite material plate with a thickness of 4~8mm.

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