A cold storage heat preservation door opened from a top plate of the cold storage

Abstract

The application discloses a cold storage heat preservation door opened from a top plate of a cold storage, and relates to the field of heat preservation doors for high cold storages. The cold storage heat preservation door comprises a wall body and a door frame. A door body is arranged in the door frame. A containing box for containing the door body is arranged on one side of the surface of the door body. A cylinder for driving the door body to lift and lower is arranged on one side of the surface of the containing box. A driving frame arranged on one side of the surface of the door body is arranged on the piston rod of the cylinder. A sealing assembly for sealing the joint between the door body and the door frame is arranged in the door frame. The opening and closing mode of the door body is achieved by the cylinder driving to vertically lift and lower the door body. The risk of space interference between the swing track of the traditional horizontally opened door and the peripheral refrigeration pipeline and the maintenance facilities of the elevated track is effectively avoided. Meanwhile, the sealing assembly is used to magnetically seal the door body and the door frame, so that the sealing performance of the door body is durable and stable during frequent opening and closing, and the cold energy leakage is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of insulated doors for elevated cold storage, and in particular to an insulated door for cold storage that opens from the top panel of the cold storage. Background Technology

[0002] In elevated cold storage facilities, maintenance walkways are usually installed below the top of the storage room to facilitate the maintenance of refrigeration equipment, pipes and electrical wiring. Each walkway entrance is usually equipped with an insulated door to block air convection between different temperature zones, maintain the stability of the temperature inside the storage room and reduce energy consumption.

[0003] Insulated doors are typically manual sliding or swing-type. However, when repairing these types of doors, maintenance personnel usually need to carry tools and manually open the heavy doors, which is not only laborious but also reduces the efficiency of maintenance. In addition, opening the doors can easily cause wear and deformation of the sealing strips, and uneven closing force can create gaps, resulting in cold air leakage. Furthermore, swing doors require additional swing space, which can easily lead to collisions with other equipment or structures when used in narrow environments such as elevated walkways, posing safety hazards during use. Utility Model Content

[0004] To address the issues of inconvenient operation, easily degraded sealing performance, and collisions caused by insufficient space in elevated walkway environments, this application provides a cold storage insulated door that opens from the top panel of the cold storage facility.

[0005] The cold storage insulated door that opens from the top panel of the cold storage facility, as provided in this application, adopts the following technical solution:

[0006] A cold storage insulated door that opens from the top of the cold storage includes a wall and a door frame. The door body is provided inside the door frame. A receiving box for accommodating the door body is provided on one side of the surface of the door frame. A cylinder for driving the door body to rise and fall is provided on one side of the surface of the receiving box. The piston rod of the cylinder is provided with a drive frame provided on one side of the surface of the door body.

[0007] The door frame is equipped with a sealing component for sealing the connection between the door and the door frame.

[0008] By adopting the above technical solution, the drive frame is driven by a cylinder to move up and down, and the drive frame drives the door to move up and down, so that the door can form a vertical lifting and lowering opening and closing method. This can reduce the installation space of the door and avoid collisions with other equipment during use. At the same time, the door and the door frame are sealed by a sealing component to ensure the sealing performance between the door and the door frame, so that the sealing performance between the door and the door frame will not decrease with the number of times the door is opened and closed.

[0009] Preferably, the sealing assembly includes multiple longitudinal magnetic sealing strips symmetrically arranged inside the door frame and multiple transverse magnetic sealing strips symmetrically arranged on both sides of the door surface. The longitudinal and transverse magnetic sealing strips are composed of flexible neodymium iron boron permanent magnet strips and low-temperature resistant ethylene propylene diene monomer (EPDM) rubber matrix.

[0010] By adopting the above technical solution, the longitudinal magnetic sealing strip and the transverse magnetic sealing strip are low-temperature resistant and highly elastic magnetic sealing strips composed of permanent magnet strips and elastic rubber matrix. When the door is closed, the longitudinal magnetic sealing strip and the transverse magnetic sealing strip can fit tightly with the door surface to form multiple seals, effectively reducing the leakage of cold air in the cold storage and achieving reliable sealing of the door during use in narrow passageways.

[0011] Preferably, guide rails for guiding the door are provided on both sides of the door body surface. The side of the guide rail near the receiving box is T-shaped, and guide grooves adapted to the guide rails are provided on both sides of the inner wall of the door frame.

[0012] By adopting the above technical solution, the door is guided by a T-shaped guide rail, ensuring that the door does not shake or deviate during the lifting and lowering process.

[0013] Preferably, the guide groove 2 is provided with a limiting plate for limiting the guide rail, and the guide rail has a limiting groove adapted to the limiting plate on the side of the surface away from the receiving box.

[0014] By adopting the above technical solution and setting a limiting plate, the limiting plate can block the second guide channel over a large area during the door's ascent, reducing the probability of external particles entering the second guide channel, thereby improving the smoothness of the guide rail inside the second guide channel and achieving efficient opening and closing of the door.

[0015] Preferably, a reinforcing component is provided on the side of the door body away from the receiving box to enhance door guidance and sealing;

[0016] The reinforcing component includes a drum-shaped block disposed on the side of the door body away from the surface of the receiving box. The two sides of the surface of the drum-shaped block are arc-shaped, and a bushing is provided on the surface of the drum-shaped block. A sealing groove adapted to the drum-shaped block is opened inside the door frame.

[0017] By adopting the above technical solution, when the door body moves downward, it drives the drum-shaped block to move downward, so that the drum-shaped block is inserted into the sealing groove. The arc surface of the drum-shaped block guides the door body to automatically center, improving the guiding performance of the door body. At the same time, the bushing improves the sealing performance between the bottom of the door body and the door frame.

[0018] Preferably, the interior of the door is insulated with polyurethane foam, and the exterior of the door is wrapped with a food-grade stainless steel panel.

[0019] By adopting the above technical solution, the door body is made of a high-strength, low-thermal-conductivity polyurethane foam core insulation board, and wrapped with a food-grade stainless steel panel, forming a lightweight and highly heat-insulating door body, which is conducive to the cylinder driving the door body to lift and lower.

[0020] Preferably, one side of the surface of the container is provided with a pneumatic triplet for purifying, reducing pressure and lubricating the factory air source, the pneumatic triplet including a filter, a pressure reducing valve and an oil mist lubricator.

[0021] By adopting the above technical solution, the air source of the factory is purified, reduced in pressure and lubricated through the filter, pressure reducing valve and lubricator inside the pneumatic triplet, so as to ensure that the cylinder can work stably and reliably in low temperature environment.

[0022] Preferably, the bushing is made of food-grade silicone.

[0023] By adopting the above technical solution, the bushing is made of food-grade silicone material, which ensures that the bushing will not harden or become brittle in the cold storage due to its low-temperature resistance, maintains high elasticity, and ensures a good seal between the bottom of the door and the door frame.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application uses a cylinder-driven method to achieve vertical lifting and lowering of the door, which effectively avoids the spatial interference risk between the swing trajectory of traditional swing doors and the surrounding refrigeration pipes and maintenance facilities of elevated walkways. At the same time, it uses a sealing component to magnetically seal between the door and the door frame, ensuring the long-term stability of the sealing performance of the door during frequent opening and closing, and effectively reducing cold leakage.

[0026] 2. The main direction is achieved through the cooperation of the guide rail and the second guide groove, and the auxiliary centering is achieved through the cooperation of the drum-shaped block and the sealing groove. Finally, the ultimate limit is achieved through the cooperation of the limit plate and the limit groove, which improves the stability of the door during the lifting process, ensures that the door will not shake during the opening and closing process, reduces the collision between the door and the door frame, and extends the service life. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the outer side of this application;

[0028] Figure 2 This is a three-dimensional structural diagram of the inner side of this application;

[0029] Figure 3 This is a partial three-dimensional structural diagram of this application;

[0030] Figure 4 For this application Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a three-dimensional structural diagram of the door body in this application;

[0032] Figure 6 For this application Figure 5 Enlarged view of point B in the middle;

[0033] Figure 7 This is a three-dimensional structural diagram of the door frame of this application;

[0034] Figure 8 For this application Figure 7 Enlarged view of point C in the middle;

[0035] Figure 9 For this application Figure 7 Enlarged view of point D in the middle;

[0036] Figure 10 This is a partial three-dimensional structural diagram of the door frame of this application;

[0037] Figure 11 This is a three-dimensional structural diagram of the container in this application.

[0038] Attached reference numerals: 1. Wall; 11. Electrical box; 12. Mounting plate; 13. Pneumatic triplet;

[0039] 2. Door body;

[0040] 3. Receiving box; 31. Connecting plate; 32. Receiving space; 321. Guide groove one; 33. Sliding groove;

[0041] 4. Door frame; 41. Guide groove 2; 42. Longitudinal mounting groove; 43. Sealing groove; 44. Transverse mounting groove;

[0042] 5. Cylinder; 51. Drive frame; 52. Mounting bracket;

[0043] 6. Guide rail; 61. Limiting groove;

[0044] 7. Sealing assembly; 71. Longitudinal magnetic sealing strip; 72. Transverse magnetic sealing strip;

[0045] 8. Limit plate;

[0046] 9. Reinforcing component; 91. Drum block; 92. Bushing. Detailed Implementation

[0047] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0048] This application discloses a cold storage insulated door that opens from the top panel of the cold storage.

[0049] Reference Figures 1-11 A cold storage insulated door that opens from the top of the cold storage includes a wall 1 and a door frame 4. The door frame 4 is U-shaped. The inner surface of the door frame 4 abuts against the door body 2. The top surface of the door frame 4 is fixedly connected to a receiving box 3 for accommodating the door body 2. The receiving box 3 has a receiving space 32 that is adapted to the door body 2. The inner wall of the receiving space 32 is on the same vertical line as the surface of the door body 2. After the door body 2 enters the receiving space 32, the surface of the door body 2 abuts against the inner wall of the receiving space 32. A door opening for installing the receiving box 3 and the door frame 4 is opened on one side of the wall 1. Connecting plates 31 are symmetrically fixedly connected to both sides of the surface of the receiving box 3. The connecting plates 31 are fixedly connected to the outer and inner sides of the wall 1 by screws, so that the receiving box 3 is fixedly installed in the door opening of the wall 1 through the connecting plates 31.

[0050] A mounting bracket 52 is fixedly connected to the center of the inner surface of the receiving box 3. The side of the mounting bracket 52 is L-shaped. A cylinder 5 for driving the door body 2 to rise and fall is fixedly connected to the side of the mounting bracket 52 away from the surface of the receiving box 3. The piston rod of the cylinder 5 passes through the surface of the mounting bracket 52 near the door body 2. A drive frame 51 is fixedly connected to the piston rod of the cylinder 5. The side of the drive frame 51 near the door frame 4 is fixedly connected to the inner side of the door body 2, so that the cylinder 5 can drive the door body 2 to rise and fall through the drive frame 51. A groove 33 is provided on the side wall of the receiving space 32 near the drive frame 51, so that the drive frame 51 can... The door 2 is driven into the interior of the accommodating space 32. An electrical box 11 is fixedly installed on the outside of the wall 1. The electrical box 11 is existing technology, and its specific principle will not be described in detail. The electrical box 11 includes a power module, a PLC controller, a relay, a terminal block, a wire trough / cable tie, and a solenoid reversing valve. A mounting plate 12 is fixedly connected to the side of the wall 1 near the electrical box 11. A pneumatic triplet 13 for purifying, reducing pressure, and lubricating the factory air source is fixedly connected to the side of the mounting plate 12 away from the wall 1. The pneumatic triplet 13 includes a filter, a pressure reducing valve, and an oil mist lubricator.

[0051] Guide rails 6 are fixedly connected to both sides of the surface of the door body 2 for guiding the door body 2. The side of the guide rail 6 near the surface of the receiving box 3 is T-shaped. The inner walls of the door frame 4 are provided with guide grooves 2 41 that are adapted to the guide rail 6. The surface of the guide rail 6 abuts against the inner wall of the guide groove 2 41, so that the guide rail 6 can slide stably inside the guide groove 2 41. The inner walls of the receiving space 32 are provided with guide grooves 1 321 that are adapted to the guide rail 6. The inner wall of guide groove 1 321 is on the same vertical line as the inner wall of guide groove 2 41, so that after the door body 2 enters the receiving space 32, it can drive the guide rail 6 into the guide groove 1 321, thereby guiding the door body 2 throughout the process.

[0052] It should be noted that waterproof and frost-proof control buttons are fixedly installed on both the outer and inner sides of the door frame 4.

[0053] Air circuit connection: Factory compressed air is connected to the inlet of the filter through a pipeline. The outlet of the filter is connected to the inlet of the pressure reducing valve. The outlet of the pressure reducing valve is connected to the inlet of the oil mist lubricator. The outlet of the oil mist lubricator is connected to the inlet of the solenoid directional valve through a pipeline. The two working outlets of the solenoid directional valve are respectively connected to the two air ports of cylinder 5 through pipelines.

[0054] Magnetic proximity switches are fixedly installed on the top wall of guide channel 1 321 and the bottom wall of guide channel 2 41, and magnets are installed at the top and bottom of guide rail 6.

[0055] Circuit connection: The positive and negative terminals of the DC24V output from the power module are connected to the terminal block to supply power to the PLC, relays, etc. The control buttons are connected to the terminal block via signal lines. The terminal block is connected to the PLC. The PLC is connected to the magnetic proximity switch. The PLC is connected to the relay. The relay is connected to the solenoid reversing valve. All wires used for connection are neatly arranged through wire troughs and fixed with cable ties to ensure that the electrical box 11 is tidy, safe, and easy to maintain.

[0056] Both the gas connection and the electrical connection are existing technologies, and the specific connection structure and process will not be described in detail.

[0057] When a user needs to enter the cold storage, they first press the control button located outside the cold storage, i.e., the control button near the electrical box 11. The solenoid valve is energized, and compressed air pushes the piston rod of cylinder 5 to retract, causing cylinder 5 to move the door 2 upward. The door 2 then moves the guide rail 6 upward, causing the magnet at the top of the guide rail 6 to approach the magnetic proximity switch on the top wall of the guide groove 321. The magnet triggers the magnetic proximity switch, which generates an electrical signal. This electrical signal directs the solenoid reversing valve, thereby stopping cylinder 5 and allowing the user to enter the cold storage.

[0058] Once the user enters the cold storage, they press the control button located inside the cold storage, away from the electrical box 11. This resets the solenoid directional valve, causing the piston rod of cylinder 5 to extend under air pressure. This causes cylinder 5 to move the door 2 downwards, which in turn moves the guide rail 6 downwards. This brings the magnet at the bottom of guide rail 6 close to the magnetic proximity switch on the bottom wall of guide groove 41. The magnet triggers the magnetic proximity switch, which generates an electrical signal. This signal then directs the solenoid directional valve, thereby stopping cylinder 5.

[0059] Before entering the cold storage, press the control button located near the electrical box 11 to retract the piston rod of cylinder 5. The piston rod of cylinder 5 drives the drive frame 51 to move upward, and the drive frame 51 drives the door 2 to move upward, allowing the user to enter the cold storage. After entering the cold storage, press the control button located inside the cold storage to extend the piston rod of cylinder 5, causing the door 2 to move downward in the opposite direction to the above. This allows the entrance and exit to be sealed in time after the user enters the cold storage, reducing the leakage of cold air and thus ensuring the low temperature inside the cold storage.

[0060] Reference Figures 3-11 The door frame 4 is provided with a sealing assembly 7 for sealing the connection between the door body 2 and the door frame 4. The sealing assembly 7 includes a plurality of longitudinal magnetic sealing strips 71 symmetrically arranged on the inner surface of the guide groove 41. The inner surface of the door frame 4 is provided with longitudinal mounting grooves 42 equal in number to the longitudinal magnetic sealing strips 71. The longitudinal magnetic sealing strips 71 are fixedly connected to the inner wall of the longitudinal mounting grooves 42, and the surface of the longitudinal magnetic sealing strips 71 is on the same vertical line as the inner surface of the door frame 4. The longitudinal magnetic sealing strips 71 are located on both sides of the guide groove 41.

[0061] The top and bottom surfaces of the door body 2 are symmetrically provided with transverse magnetic sealing strips 72. One side of the inner surface of the door frame 4 and both sides of the inner wall of the accommodating space 32 are provided with transverse mounting grooves 44 that are adapted to the transverse magnetic sealing strips 72. The surface of the transverse magnetic sealing strip 72 is fixedly connected to the inner wall of the transverse mounting groove 44. The surface of the transverse magnetic sealing strip 72, the inner wall of the accommodating space 32, and the surface of the door body 2 are on the same vertical line. The longitudinal magnetic sealing strip 71 and the transverse magnetic sealing strip 72 are composed of flexible neodymium iron boron permanent magnet strips and low-temperature resistant EPDM rubber matrix. The temperature resistance range of the rubber matrix is ​​-60℃ to 150℃. The surface of the permanent magnet strip is nickel-plated to prevent corrosion.

[0062] The longitudinal magnetic sealing strip 71 and the transverse magnetic sealing strip 72 are composed of permanent magnet strips and elastic rubber matrix. When the door 2 is closed, the longitudinal magnetic sealing strip 71 and the transverse magnetic sealing strip 72 can fit tightly with the door 2 to form multiple seals, thereby ensuring the airtightness of the cold storage. It can ensure that the longitudinal magnetic sealing strip 71 and the transverse magnetic sealing strip 72 can be fully compressed every time the door is closed, effectively preventing the problem of poor sealing caused by improper human operation, and reducing cold leakage and energy consumption.

[0063] Reference Figures 7-9The bottom wall of the guide channel 2 41 is fixedly connected with a limiting plate 8 for limiting the guide rail 6. The guide rail 6 has a limiting groove 61 adapted to the limiting plate 8 on the side away from the receiving box 3. The surface of the limiting plate 8 and the inner wall of the limiting groove 61 are on the same vertical line, so that the guide rail 6 can be shielded by the limiting plate 8 after moving upward, reducing the entry of particulate matter and impurities into the guide channel 2 41, thereby ensuring the normal operation of the guide rail 6.

[0064] By limiting the guide rail 6 with the limiting plate 8, the smoothness between the guide rail 6 and the guide groove 41 can be reduced due to external interference.

[0065] Reference Figures 5-10 A reinforcing component 9 for enhancing the guidance and sealing of the door body 2 is provided on the side of the door body 2 away from the receiving box 3. The reinforcing component 9 includes a drum-shaped block 91 fixedly connected to the side of the door body 2 away from the receiving box 3. The two sides of the surface of the drum-shaped block 91 are arc-shaped. A bushing 92 is fixedly connected to the side of the drum-shaped block 91 away from the door body 2. A sealing groove 43 adapted to the drum-shaped block 91 is opened on the inner surface of the door frame 4 away from the receiving box 3. The sealing groove 43 can accommodate the drum-shaped block 91 and the bushing 92. When the bottom end of the door body 2 abuts against the inner surface of the door frame 4 away from the receiving box 3, the side of the drum-shaped block 91 away from the bushing 92 is in the same plane as the inner surface of the door frame 4 away from the receiving box 3, and the bushing 92 is in a compressed state at this time.

[0066] When the door body 2 descends, it drives the drum-shaped block 91 to move downward, so that the drum-shaped block 91 is inserted into the sealing groove 43. The arc surface of the drum-shaped block 91 guides the door body 2 to automatically center, improving the guiding performance of the door body 2. At the same time, the deformed bushing 92 further improves the sealing performance between the bottom of the door body 2 and the inner surface of the door frame 4 away from the receiving box 3.

[0067] It should be added that: the interior of door body 2 is made of polyurethane foam insulation board, the exterior of door body 2 is wrapped with food-grade stainless steel panel, the guide rail 6 is made of 6063 aluminum alloy with anodized surface and surface hardness ≥ HV150, the limit plate 8 is made of 304 stainless steel, the drum-shaped block 91 is made of polyoxymethylene POM engineering plastic with a surface smoothness of Ra0.8, and the bushing 92 is made of food-grade silicone with a Shore hardness of 50±5A.

[0068] The longitudinal magnetic sealing strip 71 is bonded to the longitudinal mounting groove 42 with low-temperature resistant epoxy resin adhesive. The installation method between the transverse magnetic sealing strip 72 and the transverse mounting groove 44 is the same as that between the longitudinal magnetic sealing strip 71 and the longitudinal mounting groove 42. The drum-shaped block 91 is fixed to the bottom of the door body 2 with stainless steel screws, and the bushing 92 is fitted onto the outer surface of the drum-shaped block 91 with an interference fit.

[0069] Cylinder 5 is a low-temperature special cylinder. The cylinder barrel and piston rod are made of stainless steel, and the sealing ring is made of hydrogenated nitrile rubber (HNBR). The applicable temperature range is -60℃ to 150℃. The oil mist lubricant is made of low-temperature anti-condensation lubricating oil with a viscosity grade of ISO VG32 and a pour point below -50℃, ensuring that cylinder 5 can still be properly lubricated in low-temperature environments.

[0070] The electrical box 11 has an IP65 protection rating, all wiring terminals are waterproof, and the control buttons have an IP67 protection rating.

[0071] A manual pressure relief valve is installed on the main pipeline between the pneumatic triplet 13 and the solenoid directional valve. The valve body is made of brass and is used to directly vent the compressed air in the system pipeline in case of emergency or power failure, so that the door 2 loses the pneumatic locking force and can be operated manually. The vertical lifting opening method hardly occupies the lateral space of the walkway and avoids interference with surrounding equipment, making this application applicable to elevated walkways with limited space.

[0072] A pilot-operated check valve is installed at the air inlet of the rodless chamber (lower chamber, responsible for lifting) of cylinder 5.

[0073] Principle: Only when the system air supply pressure is normal (>0.4MPa) will the control air circuit open the one-way valve to allow exhaust (door 2 descends). If a pipe bursts and pressure is lost, the control pressure disappears, the one-way valve closes instantly, sealing the lower chamber of cylinder 5 tightly, and door 2 is suspended in its original position and cannot fall. This technology is an existing and mature technology, and the specific installation and operation process will not be described in detail.

[0074] The implementation principle of a cold storage insulated door that opens from the top of the cold storage in this application embodiment is as follows: During use, the door body 2 can be raised and lowered by the cylinder 5 through the control buttons on both sides of the door frame 4, realizing one-button operation, solving the problem of manual door operation being laborious, and improving the convenience of maintenance work.

[0075] The sealing assembly 7 ensures that the longitudinal magnetic sealing strip 71 and the transverse magnetic sealing strip 72 are fully compressed each time the device is closed, effectively preventing sealing problems caused by improper human operation and reducing cold leakage and energy consumption.

[0076] Thus, the door 2 is opened and closed vertically by being driven by cylinder 5, which effectively avoids the spatial interference risk between the swing trajectory of the traditional swing door and the surrounding refrigeration pipes and maintenance facilities of the elevated walkway. At the same time, the sealing component 7 is used to magnetically seal the door 2 and the door frame 4, ensuring the long-term stability of the sealing performance of the door 2 during frequent opening and closing, and effectively reducing cold leakage.

[0077] Furthermore, the guiding performance of the door body 2 and the sealing performance between the bottom of the door body 2 and the inner surface of the door frame 4 are further improved by the reinforcing component 9.

[0078] The main direction is achieved by the cooperation of guide rail 6 and guide groove 41, and the auxiliary centering is achieved by the cooperation of drum block 91 and sealing groove 43. Finally, the ultimate limit is achieved by the cooperation of limit plate 8 and limit groove 61, which improves the stability of door 2 during the lifting process, ensures that door 2 will not shake during the opening and closing process, reduces the collision between door 2 and door frame 4, and extends service life.

[0079] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cold storage insulated door that opens from the top panel of the cold storage, characterized in that: Includes a wall (1) and a door frame (4). The door frame (4) is equipped with a door body (2). A receiving box (3) for accommodating the door body (2) is provided on one side of the surface of the door frame (4). A cylinder (5) for driving the door body (2) to rise and fall is provided on one side of the surface of the receiving box (3). The piston rod of the cylinder (5) is equipped with a drive frame (51) provided on one side of the surface of the door body (2). The door frame (4) is provided with a sealing component (7) for sealing the connection between the door body (2) and the door frame (4).

2. The cold storage insulated door that opens from the top panel of the cold storage according to claim 1, characterized in that: The sealing assembly (7) includes multiple longitudinal magnetic sealing strips (71) symmetrically arranged inside the door frame (4) and multiple transverse magnetic sealing strips (72) symmetrically arranged on both sides of the surface of the door body (2). The longitudinal magnetic sealing strips (71) and transverse magnetic sealing strips (72) are composed of flexible neodymium iron boron permanent magnet strips and low-temperature resistant ethylene propylene diene monomer (EPDM) matrix.

3. The cold storage insulated door that opens from the top panel of the cold storage according to claim 1, characterized in that: The door body (2) has guide rails (6) on both sides of its surface for guiding the door body (2). The guide rail (6) is T-shaped on the side of its surface near the receiving box (3). The inner wall of the door frame (4) has guide grooves (41) on both sides that are adapted to the guide rails (6).

4. A cold storage insulated door that opens from the top panel of the cold storage room according to claim 3, characterized in that: The guide groove 2 (41) is provided with a limiting plate (8) for limiting the guide rail (6). The guide rail (6) has a limiting groove (61) adapted to the limiting plate (8) on the side away from the receiving box (3).

5. A cold storage insulated door that opens from the top panel of the cold storage room according to claim 1, characterized in that: The side of the door (2) away from the receiving box (3) is provided with a reinforcing component (9) for enhancing the guidance and sealing of the door (2); The reinforcing component (9) includes a drum-shaped block (91) disposed on the side of the door body (2) away from the receiving box (3). The two sides of the surface of the drum-shaped block (91) are arc-shaped. A bushing (92) is provided on the surface of the drum-shaped block (91). A sealing groove (43) adapted to the drum-shaped block (91) is opened inside the door frame (4).

6. A cold storage insulated door that opens from the top panel of the cold storage room according to claim 1, characterized in that: The door body (2) is insulated with polyurethane foam inside and wrapped with food-grade stainless steel panel on the outside.

7. A cold storage insulated door that opens from the top panel of the cold storage facility according to claim 1, characterized in that: The surface of the container (3) is provided with a pneumatic triplet (13) for purifying, reducing pressure and lubricating the factory air source. The pneumatic triplet (13) includes a filter, a pressure reducing valve and an oil mist lubricator.

8. A cold storage insulated door that opens from the top panel of the cold storage according to claim 5, characterized in that: The bushing (92) is made of food-grade silicone.

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