Cold storage door with movable buffering function

Abstract

The utility model belongs to the technical field of cold storage doors, and particularly relates to a cold storage door with a moving buffering function, which comprises a door plate main body, an electric driving mechanism arranged above the door plate main body, and a disconnection structure arranged between the door plate main body and the electric driving mechanism and capable of disconnecting the connection between the door plate main body and the electric driving mechanism and ensuring that the door plate main body cannot be disconnected when the electric driving mechanism fails. The door plate body can be manually operated to slide, the buffering mechanisms are arranged at the two ends of the sliding range of the door plate body correspondingly, the door plate body can be rapidly moved without worrying about the collision problem, the door plate body is high in moving speed, it means that cold air loss is less, and refrigeration energy consumption can be reduced easily; an auxiliary sealing frame capable of sliding back and forth in a short distance is further arranged at the inner position of the door plate body, the auxiliary sealing frame slides back and forth through sliding of the door plate body, extra power drive is not needed, and the sealing performance can be ensured and cold air leakage can be reduced when the door plate body is in the closed state.

Description

Technical Field

[0001] This utility model belongs to the field of cold storage door technology, specifically a cold storage door with a moving buffer function. Background Technology

[0002] In the fields of cold chain logistics and food processing, electric sliding cold storage doors are key equipment for temperature control, and their performance directly affects the energy efficiency of cold storage and the quality of goods preservation.

[0003] Traditional drive systems typically employ high-torque geared motors to overcome the sliding friction caused by the door's weight. However, this configuration results in the door needing to overcome static friction during startup and eliminate inertia during braking, leading to prolonged opening and closing times. This reduces cold storage turnover efficiency and causes cold air loss due to prolonged door opening. Some improvement solutions attempt to use variable frequency speed control technology, but these are limited by the inherent characteristics of mechanical transmission systems, offering limited speed increase potential and easily causing positioning inaccuracies.

[0004] Conventional sealing structures use a single layer of EPDM rubber strips arranged around the circumference of the door frame. Their sealing effect is constrained by multiple factors: First, the assembly tolerance between the door and the track results in uneven gaps after closure; second, the low temperature environment causes the rubber material to undergo a glass transition, significantly reducing the sealing contact pressure; in addition, the bottom of the door needs to reserve a track gap, which becomes the main channel for cold air leakage.

[0005] Therefore, there is an urgent need to develop a new type of sliding cold storage door system that can achieve high-acceleration movement and improve sealing performance. Utility Model Content

[0006] Based on this, this solution provides a cold storage door with a moving buffer function. It uses a motor-controlled sliding mechanism, which can be quickly disconnected and manually operated. It is equipped with an auxiliary sealing frame to improve the sealing effect, thereby solving the problems of slow opening and closing speed, excessive cold air loss, and insufficient sealing effect of existing cold storage doors.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] A cold storage door with a moving buffer function includes: a door panel body, an electric drive mechanism on the top of the door panel body, a disconnection structure between the door panel body and the electric drive mechanism to disconnect the connection between the door panel body and the electric drive mechanism for manual sliding, buffer mechanisms at both ends of the sliding range of the door panel body to allow the door panel body to move quickly without worrying about impact, reduce cold air loss, and lower refrigeration energy consumption, and an auxiliary sealing frame that can slide a short distance back and forth on the inner part of the door panel body to improve the sealing performance of the cold storage door, the auxiliary sealing frame having a limited slip structure for sliding the auxiliary sealing frame.

[0009] Optionally, in one embodiment of the present invention, a door frame structure is further included, the door frame structure including a left door frame, a middle door frame and a right door frame, the left door frame being located at the far left of the cold storage door, the right door frame being located at the far right of the cold storage door, and the middle door frame being located in the middle of the cold storage door.

[0010] Optionally, in one embodiment of the present invention, the electric drive mechanism includes a drive motor, a lead screw, a slider, and a mounting beam. The lead screw is disposed inside the mounting beam and its two ends are screwed to the two ends of the mounting beam. The slider is slidably connected to the lead screw. The drive motor is fixedly installed on one side of the mounting beam and its output end is connected to one end of the lead screw. The mounting beam is also provided with a U-shaped upper sliding groove.

[0011] Optionally, in one embodiment of the present invention, the disconnection structure includes a connector, a support member, and an assembly groove. The assembly groove is formed at the upper edge of the door panel body, the support member is installed on the top of the door panel body, and the connector is installed in the assembly groove and is slidably connected to the support member.

[0012] Optionally, in one embodiment of the present invention, the limited-slip structure includes limiting grooves formed at the top and bottom of the auxiliary sealing frame, an "L"-shaped limiting rod fixedly installed at the upper and lower parts of the middle door frame, and an abutting block provided on the right door frame. The left end of the limiting groove is designed with an obtuse angle inward. The limiting rod is slidably connected to the limiting groove. The contact surface of the abutting block is a slope. Correspondingly, the contact surface on the right side of the auxiliary sealing frame is also a slope.

[0013] Optionally, in one embodiment of the present invention, a sliding structure is provided at the part of the auxiliary sealing frame close to the door panel body. The sliding structure includes a sliding part integral with the auxiliary sealing frame and sliding grooves opened at the top and bottom of the door panel body, for keeping the auxiliary sealing frame sliding smoothly back and forth.

[0014] Optionally, in one embodiment of the present invention, the buffer mechanism includes a first buffer and a second buffer. The first buffer is disposed on the left door frame, and the second buffer is disposed on the right door frame. Both the first buffer and the second buffer include a buffer box, an elastic element, and a buffer plate. The rear part of the buffer plate is slidably connected to the front part of the buffer. The elastic element is disposed in the buffer box, and the front end of the elastic element is fixedly connected to the rear part of the buffer plate.

[0015] Optionally, in one embodiment of the present invention, a sealing strip is connected between the inner edge of the door panel body and the front end face of the auxiliary sealing frame.

[0016] Optionally, in one embodiment of the present invention, the top and bottom of the door panel body are respectively provided with an upper pulley and a lower pulley.

[0017] Optionally, in one embodiment of the present invention, the door panel body has a double-layer structure, the outer layer of the door panel body is an explosion-proof layer, and the inner layer of the door panel body is a heat insulation layer.

[0018] Compared with the prior art, the cold storage door with a movable buffer function provided by this utility model has the following characteristics:

[0019] By combining symmetrically arranged upper / lower rollers with lead screws and sliders, the door body achieves smooth linear motion, reducing operational vibration and noise.

[0020] The top of the door panel body is equipped with a disconnection structure, which can quickly complete the switching between electric and manual modes, ensuring the reliability of emergency operation in case of power failure or malfunction. The left and right door frames are equipped with independent buffers to realize the end speed reduction of the door panel body. The design of the buffer stroke and drive system reduces the dependence on the precision of motor control.

[0021] The limiting rod and the obtuse-angle limiting groove, together with the inclined abutment block, can realize the compensating movement in the inner and outer directions of the auxiliary sealing frame. The stepped sealing strip forms an S-shaped sealing structure when locked, ensuring the sealing performance.

[0022] The door frame is equipped with an externally pluggable heating tube, which can be disassembled and installed without removing other parts, thus preventing ice from forming between the main body of the door panel and the door frame.

[0023] The main body of the door panel adopts a double-layer explosion-proof design. The explosion-proof layer, as the first barrier, can prevent external damage from affecting the inner insulation structure and reduce the risk of damage to the equipment inside the cold storage. The insulation layer reduces the heat exchange between the inside and outside of the cold storage and maintains a stable low-temperature environment.

[0024] The structure is simpler, making it easier to inspect and maintain. It is also more energy-efficient and has a better sealing effect compared to traditional sliding cold storage doors. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the front structure of a cold storage door with a movable buffer function according to Embodiment 1 of this utility model;

[0027] Figure 2This is a schematic diagram of the first buffer structure in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the disconnection mechanism structure of Embodiment 1 of this utility model;

[0029] Figure 4 This is a top view of the auxiliary sealing frame and the door frame in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the front structure of the auxiliary sealing frame in Embodiment 1 of this utility model;

[0031] Reference numerals: Door panel body 1, upper pulley 101, lower pulley 102, drive motor 201, mounting beam 202, lead screw 203, slider 204, left door frame 3, middle door frame 4, limit rod 401, right door frame 5, first buffer 601, buffer plate 6011, elastic element 6012, guide rod 6013, second buffer 602, auxiliary sealing frame 7, limit groove 701, sealing strip 702, inclined surface 703, abutment block 704, sliding part 705, plug-in part 801, assembly groove 802, positioning groove 803, plug block 804, support member 805. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0033] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" 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 this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0034] Example 1

[0035] Because existing electric sliding cold storage doors are relatively slow, prone to cold air loss, and have insufficient sealing, a cold storage door with a faster movement speed, better sealing, and a movement buffer function was designed. The specific solution is as follows:

[0036] like Figure 1-5 As shown, a cold storage door with a moving buffer function includes: a door panel body 1, an electric drive mechanism on the top of the door panel body 1, a disconnection structure between the door panel body 1 and the electric drive mechanism to disconnect the connection between the door panel body 1 and the electric drive mechanism for manual sliding, buffer mechanisms at both ends of the sliding range of the door panel body 1 to allow the door panel body 1 to move quickly without worrying about impact, reduce cold air loss, and lower refrigeration energy consumption, and an auxiliary sealing frame 7 that can slide a short distance back and forth at the inner position of the door panel body 1 to improve the sealing performance of the cold storage door, and the auxiliary sealing frame 7 has a limited sliding structure to allow the auxiliary sealing frame 7 to slide.

[0037] In this embodiment, the cold storage door also includes a door frame structure, which includes a left door frame 3, a middle door frame 4, and a right door frame 5. The left door frame 3 is located on the far left of the cold storage door, the right door frame 5 is located on the far right of the cold storage door, and the middle door frame 4 is located in the middle of the cold storage door. When the door panel body 1 is closed, the middle door frame 4 is located on the left side of the door panel body 1, and the right door frame 5 is located on the right side of the door panel body 1. The top and bottom of the middle door frame 4 and the right door frame 5 are also provided with upper door frames and lower door frames to ensure a sealing effect. Specifically, the front side of the middle door frame 4 is a smooth surface, which will not interfere with the sliding of the door panel body 1. In this embodiment, the middle door frame 4 and the right door frame 5 are provided with heating tubes, which can be used for door frame heating. The heating tubes are installed from the outside of the door frame to the inside to prevent ice from forming at the position where the door panel body 1 is in contact with the door frame. The heating tubes are located in the door frame, and in the event of a failure of the heating tubes, they can be removed from the door frame without disassembling the door panel body 1 or opening the cold storage door for disassembly.

[0038] The electric drive mechanism includes a drive motor 201, a lead screw 203, a slider 204, and a mounting beam 202. The lead screw 203 is located inside the mounting beam 202, and both ends of the lead screw 203 are screwed to both ends of the mounting beam 202. The slider 204 is slidably connected to the lead screw 203. The drive motor 201 is fixedly installed on one end of the outer side of the mounting beam 202, and the output end of the drive motor 201 is connected to one end of the lead screw 203. The mounting beam 202 is also provided with a U-shaped upper sliding groove, which is used for the upper pulley 101 on the door panel body 1 to slide, so that the door panel body 1 moves more smoothly when moving left and right. In this embodiment, opposite to the mounting beam 202, a lower sliding groove of the same length as the mounting beam 202 is provided below the door panel body 1 for the lower sliding wheel 102 of the door panel body 1 to slide.

[0039] The disconnection structure includes a connector 801, a support 805, and an assembly groove 802. The assembly groove 802 is located at the upper edge of the door panel body 1. The support 805 is installed on the top of the door panel body 1. The connector 801 is installed in the assembly groove 802 and is slidably connected to the support 805. Specifically, the slider 204 has a connector hole and a connector groove. A horizontal positioning groove 803 is also provided on one side of the assembly groove 802. The connector 801 is "T". The insert rod and insert block 804 are of the same type. The insert rod is screwed onto the insert block 804. The support member 805 is slidably connected to the front side of the insert block 804. When connecting, the insert rod is pushed upward so that the upper end of the insert rod is inserted into the insertion hole and the upper end of the insert block 804 is inserted into the slot. The insert rod is then rotated at a certain angle so that the horizontal part of the insert rod is placed in the positioning groove 803, so that the upper part of the insert rod and the upper part of the insert block 804 are always located in the insertion hole. When the slider 204 moves, the door panel body 1 can be driven to slide through the insert rod and the insert block 804.

[0040] The limited-slip structure includes limiting grooves 701 formed at the top and bottom of the auxiliary sealing frame 7, "L"-shaped limiting rods 401 fixedly installed at the upper and lower parts of the middle door frame 4, and an abutment block 704 located on the right side door frame 5. The left end of the limiting groove 701 is designed with an obtuse angle inwards. The limiting rod 401 is slidably connected to the limiting groove 701, which acts as a sliding track for the limiting rod 401 to slide. The contact surface of the abutment block 704 is a slope 703. Correspondingly, the right side of the auxiliary sealing frame 7... The contact surface is also an inclined surface 703. After the right side of the auxiliary sealing frame 7 is released from the abutment block 704, the right side slides inward. At the same time, the limiting rod 401 slides into the inward bending part of the limiting groove 701, causing the left side of the auxiliary sealing frame 7 to also slide inward, so that the entire auxiliary sealing frame 7 is tightly fitted with the frame, improving the sealing performance. In other solutions, in order to reduce the wear between the limiting rod 401 and the limiting groove 701, the lower end of the limiting rod 401 is designed as a roller, making the sliding of the limiting rod 401 and the limiting groove 701 smoother.

[0041] The auxiliary sealing frame 7 is provided with a sliding structure near the door panel body 1. The sliding structure includes a sliding part 705 integral with the auxiliary sealing frame 7 and sliding grooves opened at the top and bottom of the door panel body 1. It is used to keep the auxiliary sealing frame 7 sliding smoothly back and forth. Specifically, at least one sliding groove is opened on the left and right sides of the top and bottom of the door panel body 1 to maintain left and right balance.

[0042] The buffer mechanism includes a first buffer 601 and a second buffer 602. The first buffer 601 is located on the left door frame 3, and the second buffer 602 is located on the right door frame 5. Both the first buffer 601 and the second buffer 602 include a buffer box, an elastic element 6012, and a buffer plate 6011. The rear part of the buffer plate 6011 is slidably connected to the front part of the buffer box. Multiple guide rods 6013 are installed on the rear part of the buffer plate 6011, and the guide rods 6013 are slidably connected to the front part of the buffer box. The elastic element 6012 is located inside the buffer box, and the front end of the elastic element 6012 is fixedly connected to the rear part of the buffer plate 6011. When the cold storage door is opened or closed, the door panel body 1 moves quickly. When the left or right side of the door panel body 1 abuts against the buffer plate 6011 on the corresponding side, the elastic element 6012 can be compressed backward, which can provide buffering for the door panel body 1 until the door panel body 1 is fully in place. There is no need to worry about the accuracy of the electric drive mechanism or the impact damage to the door panel body 1.

[0043] A sealing strip 702 is connected between the inner edge of the door panel body and the front end face of the auxiliary sealing frame 7. The sealing strip 702 is arranged along the inner circumference of the door frame body and the auxiliary sealing frame 7. When the auxiliary sealing frame 7 slides inward, the sealing strip 702 can form a stepped structure. After the stepped structure fits tightly with the door frame, the sealing performance is better. Correspondingly, a structure that fits with the stepped structure is also provided on the door frame, so that after the door panel body 1 is closed, the edge gap is an S-shaped bend structure to ensure the sealing performance.

[0044] The top and bottom of the door panel body 1 are respectively provided with upper pulley 101 and lower pulley 102. The top and bottom of the door panel body 1 are respectively provided with two symmetrically arranged upper pulley 101 and lower pulley 102. The upper pulley 101 is provided with a connecting strip, which is fixedly connected to the top of the door panel body 1. With the setting of upper pulley 101 and lower pulley 102, the movement of the door panel body 1 can remain smooth and reduce the noise generated by the movement, regardless of whether the cold storage door is in electric mode or manual mode.

[0045] The door panel body 1 has a double-layer structure, with the outer layer being an explosion-proof layer and the inner layer being an insulation layer. In this embodiment, the insulation layer is made of polyurethane foam with a thickness of 80-150mm, and the explosion-proof layer is made of stainless steel with a thickness of 1.5-3.0mm in most parts. The thickness is relatively thickened at the top and bottom to match the structural design of the top and bottom.

[0046] In this embodiment, a locking structure is also provided on the front right side of the door panel body 1. The locking structure can be manually moved to engage the door panel body 1 with the buffer box of the second buffer 602, keeping the door panel body 1 locked. This prevents the door panel body 1 from loosening and causing cold air leakage, and is mainly used in case of electric drive mechanism failure.

[0047] Working principle:

[0048] Taking the closure of a cold storage door as an example, in the initial state, the door panel body 1 is located at the far left. The drive motor 201 drives the slider 204 to move to the right. The slider 204 drives the door panel body 1 to move to the right. When the door panel body 1 moves close to the far right, the right side of the door panel body 1 abuts against the buffer plate 6011 and begins to buffer. The right side of the auxiliary sealing frame 7 contacts the abutment block 704. At the same time, the limit rod 401 begins to slide into the bending position of the limit groove 701. The auxiliary sealing frame 7 begins to slide inward until the door panel body 1 has completely moved to the far right. The buffer plate 6011 fits against the right side of the door panel body 1, the auxiliary sealing frame 7 moves to the innermost position, and the sealing strip 702 fits tightly against the door frame, completing the closure of the door panel body 1.

[0049] If the electric drive mechanism fails to operate, the rotating rod can be operated and pulled down to disengage the rod from the connecting slider 204. The door body 1 can then be moved and opened manually. The electric drive mechanism can be repaired without affecting the use of the cold storage door.

[0050] The cold storage door of this solution adopts a composite guide rail structure of lead screw 203, slider 204 and double slide rail, combined with 102 sets of symmetrically arranged upper and lower pulleys to achieve smooth linear movement of the door body and reduce operating vibration and noise.

[0051] The mechanical disconnection structure can quickly switch between electric and manual modes, ensuring the reliability of emergency operation in case of power failure or malfunction. The left and right door frames are equipped with independent buffers, and the end speed is reduced by the compression characteristics of the elastic element 6012. The design of the buffer stroke and drive system reduces the dependence on the precision of motor control.

[0052] The limiting rod 401 and the obtuse angle limiting groove 701 cooperate with the inclined surface 703 to abut the block 704, realizing the compensating movement in the inner and outer directions of the auxiliary sealing frame 7. The stepped sealing strip 702 forms an S-shaped sealing structure when locked, ensuring the sealing performance.

[0053] The door frame is equipped with an embedded heating element with an external plug-in design, which supports maintenance without shutting down the machine.

[0054] The main body of the door panel 1 adopts a double-layer explosion-proof design. The explosion-proof layer, as the first barrier, can prevent external damage from affecting the inner insulation structure and reduce the risk of damage to the internal equipment of the cold storage. The insulation layer reduces the heat exchange between the inside and outside of the cold storage and maintains a stable low-temperature environment.

[0055] The structure is simpler, making it easier to inspect and maintain. It is also more energy-efficient and has a better sealing effect compared to traditional sliding cold storage doors.

[0056] Example 2

[0057] In this embodiment, the structure of the cold storage door is basically the same as that of Embodiment 1. The difference is that, based on Embodiment 1, the setting of the lower roller is cancelled, and a sliding mechanism is set at the bottom of the door panel body. The slide rail is set on the left wall, and the sliding mechanism is slidably connected to the slide rail. This modification eliminates the need to set a chute on the ground at the entrance and exit of the cold storage, thus preventing the accumulation of dust and reducing the amount of dust brought into the cold storage.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cold storage door with a movable buffer function, comprising: The door panel body is characterized in that an electric drive mechanism is provided above the door panel body, and a disconnection structure is provided between the door panel body and the electric drive mechanism to disconnect the connection between the door panel body and the electric drive mechanism for manual sliding. Buffer mechanisms are provided at both ends of the sliding range of the door panel body to allow the door panel body to move quickly without worrying about impacts, reduce cold air loss, and lower refrigeration energy consumption. An auxiliary sealing frame that can slide a short distance forward and backward is also provided at the inner position of the door panel body to improve the sealing performance of the cold storage door. The auxiliary sealing frame is provided with a limited-slip structure to allow the auxiliary sealing frame to slide.

2. A cold storage door with a movable buffer function according to claim 1, characterized in that, It also includes a door frame structure, which includes a left door frame, a middle door frame and a right door frame. The left door frame is located on the far left of the cold storage door, the right door frame is located on the far right of the cold storage door, and the middle door frame is located in the middle of the cold storage door.

3. A cold storage door with a movable buffer function according to claim 1, characterized in that, The electric drive mechanism includes a drive motor, a lead screw, a slider, and a mounting beam. The lead screw is located inside the mounting beam and its two ends are screwed to the two ends of the mounting beam. The slider is slidably connected to the lead screw. The drive motor is fixedly installed on one side of the mounting beam and its output end is connected to one end of the lead screw. The mounting beam is also provided with a U-shaped upper sliding groove.

4. A cold storage door with a movable buffer function according to claim 1, characterized in that, The disconnection structure includes a connector, a support, and an assembly groove. The assembly groove is located at the upper edge of the door panel body. The support is installed on the top of the door panel body. The connector is installed in the assembly groove and is slidably connected to the support.

5. A cold storage door with a movable buffer function according to claim 1, characterized in that, The limited-slip structure includes limiting grooves at the top and bottom of the auxiliary sealing frame, "L"-shaped limiting rods fixedly installed at the upper and lower parts of the middle door frame, and an abutment block on the right door frame. The left end of the limiting groove is designed with an obtuse angle inward. The limiting rod is slidably connected to the limiting groove. The contact surface of the abutment block is a slope. Correspondingly, the contact surface on the right side of the auxiliary sealing frame is also a slope.

6. A cold storage door with a movable buffer function according to claim 1, characterized in that, The auxiliary sealing frame is provided with a sliding structure at the part close to the door panel body. The sliding structure includes a sliding part integral with the auxiliary sealing frame and sliding grooves opened at the top and bottom of the door panel body, which are used to keep the auxiliary sealing frame sliding smoothly back and forth.

7. A cold storage door with a movable buffer function according to claim 1, characterized in that, The buffer mechanism includes a first buffer and a second buffer. The first buffer is located on the left door frame, and the second buffer is located on the right door frame. Both the first buffer and the second buffer include a buffer box, an elastic element, and a buffer plate. The rear part of the buffer plate is slidably connected to the front part of the buffer. The elastic element is located inside the buffer box, and the front end of the elastic element is fixedly connected to the rear part of the buffer plate.

8. A cold storage door with a movable buffer function according to claim 1, characterized in that, A sealing strip connects the inner edge of the door panel body to the front end face of the auxiliary sealing frame.

9. A cold storage door with a movable buffer function according to claim 1, characterized in that, The top and bottom of the door panel body are respectively equipped with upper pulleys and lower pulleys.

10. A cold storage door with a movable buffer function according to claim 1, characterized in that, The door panel body has a double-layer structure, with the outer layer being an explosion-proof layer and the inner layer being a heat insulation layer.

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