Automatic sealing device for refrigeration house

Abstract

The invention relates to the technical field of refrigeration house sealing, in particular to an automatic sealing device for a refrigeration house, which is characterized by comprising a door frame and a door, the door frame is embedded and fixedly mounted on the wall of the refrigeration house, one end of the door frame is hinged to one end of the door, and a sealing mechanism is arranged on the door. The sealing mechanism is used for enhancing the sealing performance between the door frame and the door, and a reinforcing mechanism is arranged on the door and used for enhancing the effect of the sealing mechanism. The effect of improving the stability of the refrigeration storage sealing device is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cold storage sealing, and in particular to an automatic sealing device for cold storage. Background Art

[0002] With the development of refrigeration technology, cold storage sealing devices have become one of the key factors to ensure the refrigeration effect. And sealing performance is one of the key challenges of current cold storage sealing devices. The design and material selection of seals directly affect the stability and energy efficiency of the internal environment of the cold storage.

[0003] Traditional sealing devices are easily affected by temperature changes and pressure changes, resulting in unstable sealing effects, which increases energy consumption and operating costs. Especially in large cold storages, due to the large volume and temperature differences, the stability of the sealing device is particularly important. Summary of the invention

[0004] In order to improve the stability of the sealing device, the present application provides an automatic sealing device for a cold storage.

[0005] The present application provides an automatic sealing device for cold storage, which adopts the following technical solution:

[0006] An automatic sealing device for a cold storage comprises a door frame and a door, wherein the door frame is embedded and fixedly installed on the wall of the cold storage, one end of the door frame is hinged to one end of the door, a sealing mechanism is arranged on the door, the sealing mechanism is used to enhance the sealing between the door frame and the door, and a reinforcing mechanism is arranged on the door, the reinforcing mechanism is used to enhance the effect of the sealing mechanism;

[0007] The sealing mechanism comprises:

[0008] A mounting groove, the mounting groove is arranged around four side walls where the door abuts against the door frame;

[0009] An airbag, the airbag is wound around and fixedly installed in the installation groove;

[0010] A control component, the control component is arranged on the door, the control component is communicated with the airbag, and the control component is used to control the inflation and deflation of the airbag, thereby controlling the sealing between the door and the door frame;

[0011] An auxiliary component is arranged on the door, the auxiliary component is communicated with the airbag, and the auxiliary component is used to control the deflation of the airbag.

[0012] By adopting the above technical solution, when in use, the control component inflates the airbag, and the airbag abuts against the door frame after inflation, thereby enhancing the sealing between the door and the door frame; at the same time, the reinforcing mechanism can further increase the pressure in the airbag, thereby improving the stability of the cold storage sealing device. When the door needs to be opened, the auxiliary component is operated to deflate the airbag, thereby facilitating the door opening while avoiding damage to the airbag, thereby improving the stability of the cold storage sealing device.

[0013] Optionally, the control component includes:

[0014] A mounting hole, the mounting hole being formed on an end of the door away from the hinge end;

[0015] Two limiting grooves, both of which are arranged on the side wall of the mounting hole;

[0016] Two limit blocks, the two limit blocks correspond to the two limit grooves one by one and are slidably connected;

[0017] A piston, wherein the two limit blocks are fixedly connected to the side walls of the piston, the piston is located in the mounting hole, and the diameter of the piston is smaller than the diameter of the mounting hole;

[0018] A connecting rope, one end of which is fixedly connected to the piston, and the other end of which is fixedly connected to the door frame;

[0019] A connecting pipe, the connecting pipe is embedded in the door, one end of the connecting pipe is connected to the airbag, and the other end of the connecting pipe is connected to an end of the mounting hole close to the bottom wall;

[0020] A spring, wherein the spring is located in the mounting hole, one end of the spring is fixedly connected to the piston, and the other end of the spring is fixedly connected to the bottom wall of the mounting hole;

[0021] A rubber pad, the rubber pad is disc-shaped, the rubber pad is fixedly mounted on one end of the piston close to the bottom wall of the mounting hole, the diameter of the rubber pad is larger than the diameter of the piston, and the diameter of the rubber pad is smaller than the diameter of the mounting hole

[0022] By adopting the above technical solution, when the door is opened, the connecting rope drives the piston to slide in the mounting hole, the spring is stretched, and the gas in the airbag is drawn into the mounting hole, so that the airbag is retracted into the mounting groove, and the door can be easily opened, thereby avoiding damage to the airbag; when the door needs to be closed, under the action of the spring, the piston pushes the gas in the mounting hole into the airbag, and the pressure at the bottom of the mounting hole increases, causing the rubber pad to deform and abut against the side wall of the mounting hole, thereby improving the inflation effect, thereby improving the sealing between the door and the door frame, and improving the stability of the cold storage sealing device.

[0023] Optionally, the auxiliary components include:

[0024] A pressure relief channel, wherein the pressure relief channel is provided on the door, one end of the pressure relief channel is connected to the airbag, and the other end of the pressure relief channel is connected to the outside world;

[0025] A valve, the valve being fixedly installed in the pressure relief channel, and the valve being capable of controlling the communication between the pressure relief channel and the outside world;

[0026] A first rotating shaft, wherein the first rotating shaft is passed through the door and is fixedly connected to the rotating shaft of the valve.

[0027] By adopting the above technical solution, when the air pressure in the airbag is too high to open the door, the first rotating shaft is rotated to open the valve, so that the gas in the airbag flows into the outside through the pressure relief channel. At this time, the airbag is retracted into the installation groove, avoiding the situation where the cold storage door is forcibly opened and the airbag is damaged, thereby improving the stability of the cold storage sealing device.

[0028] Optionally, the reinforcing mechanism includes:

[0029] A connecting channel, wherein the connecting channel is provided on the door, and both ends of the connecting channel are connected to the pressure relief channel;

[0030] A slide rod, the slide rod is fixedly installed in the pressure relief channel, one end of the slide rod is located between two points where the connecting channel and the pressure relief channel are connected, and the other end of the slide rod is away from the valve;

[0031] A screw, the screw being rotatably mounted in the pressure relief channel, one end of the screw being located between two points where the connecting channel and the pressure relief channel are connected, the other end of the screw being away from the valve, and the sliding rod being arranged in parallel with the screw;

[0032] A blocking block, the blocking block is penetrated and slidably mounted on the sliding rod, the blocking block is penetrated and threadedly mounted on the screw rod, and the blocking block can completely block the pressure relief channel;

[0033] A first bevel gear, wherein the first bevel gear is coaxially fixedly connected to the screw;

[0034] a second rotating shaft, the second rotating shaft being passed through and rotatably mounted on the door, one end of the second rotating shaft being located in the pressure relief channel;

[0035] a second bevel gear, the second bevel gear is coaxially fixedly mounted on one end of the second rotating shaft located at the pressure relief channel, the first bevel gear is meshed with the second bevel gear;

[0036] A locking assembly is connected to an end of the second rotating shaft away from the second bevel gear, and the locking assembly is used to lock the second rotating shaft.

[0037] By adopting the above technical solution, when the temperature of the cold storage is too low, the air in the airbag shrinks, and the sealing between the door and the door frame is reduced, the second rotating shaft is rotated to drive the second bevel gear to rotate, the second bevel gear drives the first bevel gear, and the first bevel gear drives the screw, and the screw rotates to move the block away from the valve. When the block continues to move away from the valve after passing through the position where the connecting channel is connected to the pressure relief channel, the block pushes the gas in the pressure relief channel into the airbag, so that the pressure in the airbag increases, thereby improving the sealing between the door and the door frame, and improving the stability of the cold storage sealing device.

[0038] Optionally, the locking assembly includes:

[0039] a baffle, the baffle being fixedly connected to an end of the second rotating shaft away from the second bevel gear;

[0040] A set screw is threadedly connected to the baffle, and the set screw is arranged parallel to the second rotating shaft.

[0041] By adopting the above technical solution, the set screw is rotated so that the set screw abuts against the door, thereby preventing the second rotating shaft from reversing and improving the stability of the cold storage sealing device.

[0042] Optionally, damping hinges are fixedly mounted on both the door and the door frame, and the damping hinges enable the door to be hinged to the door frame.

[0043] By adopting the above technical solution, the door is prevented from impacting the door frame and deforming during closing under the elastic force of the spring, which affects the sealing between the door and the door frame, thereby improving the stability of the cold storage sealing device.

[0044] Optionally, a torsion spring is sleeved on the first rotating shaft, one end of the torsion spring is fixedly connected to the first rotating shaft, and the other end of the torsion spring is fixedly connected to the door.

[0045] By adopting the above technical solution, the sealing between the door and the door frame is prevented from being affected due to the operator forgetting to reset, thereby improving the stability of the cold storage sealing device.

[0046] Optionally, an avoidance groove is provided on one end of the door frame close to the mounting hole, and one end of the connecting rope away from the piston is fixedly installed in the avoidance groove.

[0047] By adopting the above technical solution, the connecting rope can be prevented from being squeezed by the door and the door frame, which is beneficial to increasing the service life of the connecting rope and further improving the stability of the cold storage sealing device.

[0048] In summary, the present application includes at least one of the following beneficial technical effects:

[0049] 1. When the door is opened, the connecting rope drives the piston to slide in the mounting hole, the spring is stretched, and the gas in the airbag is drawn into the mounting hole, so that the airbag is stored in the mounting groove, and the door can be easily opened, avoiding damage to the airbag; when the door needs to be closed, under the action of the spring, the piston pushes the gas in the mounting hole into the airbag, and the pressure at the bottom of the mounting hole increases, causing the rubber pad to deform and abut against the side wall of the mounting hole, thereby improving the inflation effect, thereby improving the sealing between the door and the door frame, and improving the stability of the cold storage sealing device;

[0050] 2. When the air pressure in the airbag is too high to open the door, rotate the first shaft to open the valve, so that the gas in the airbag flows into the outside through the pressure relief channel. At this time, the airbag is retracted into the installation groove to avoid the situation where the airbag is damaged by forcibly opening the cold storage door, thereby improving the stability of the cold storage sealing device;

[0051] 3. When the temperature of the cold storage is too low, the air in the airbag shrinks, reducing the sealing between the door and the door frame. The second rotating shaft drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear, and the first bevel gear drives the screw. The screw rotates to move the block away from the valve. When the block continues to move away from the valve after passing through the connecting channel and the pressure relief channel. The block pushes the gas in the pressure relief channel into the airbag, increasing the pressure in the airbag, thereby improving the sealing between the door and the door frame and improving the stability of the cold storage sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0053] Figure 2 It is a schematic diagram of the structure of the control component of the embodiment of the present application;

[0054] Figure 3 It is a schematic diagram of the structure of the auxiliary components of the embodiment of the present application;

[0055] Figure 4 This is an embodiment of the present application Figure 2 A magnified image of point A;

[0056] Figure 5 This is an embodiment of the present application Figure 3 Enlarged view of point B.

[0057] Description of reference numerals:

[0058] 1. Door;

[0059] 2. Door frame;

[0060] 31. Mounting slot; 32. Airbag; 33. Control assembly; 331. Mounting hole; 332. Limiting slot; 333. Limiting block; 334. Piston; 335. Connecting rope; 336. Connecting pipe; 337. Spring; 338. Rubber pad; 34. Auxiliary assembly; 341. Pressure relief channel; 342. Valve; 343. First rotating shaft;

[0061] 41. connecting channel; 42. sliding rod; 43. screw rod; 44. blocking block; 45. first bevel gear; 46. second rotating shaft; 47. second bevel gear; 48. locking assembly; 481. baffle plate; 482. set screw;

[0062] 5. Damping hinge;

[0063] 6. Torsion spring;

[0064] 7. Avoidance groove. DETAILED DESCRIPTION

[0065] The following is combined with Figure 1-5 This application is described in further detail.

[0066] The embodiment of the present application discloses an automatic sealing device for a cold storage.

[0067] Reference Figure 1 The automatic sealing device for cold storage comprises a door frame 2 and a door 1. The door frame 2 is embedded and fixedly installed on the wall of the cold storage, and one end of the door frame 2 is hinged to one end of the door 1.

[0068] Reference Figure 2 The door 1 is provided with a sealing mechanism, which is used to enhance the sealing between the door frame 2 and the door 1. The door 1 is provided with a reinforcing mechanism, which is used to enhance the effect of the sealing mechanism.

[0069] Reference Figure 1 and Figure 2 The sealing device includes a mounting groove 31, which is arranged around the four side walls where the door 1 and the door frame 2 abut. An airbag 32 is arranged and fixedly installed in the mounting groove 31. A control component 33 is provided on the door 1, and the control component 33 is communicated with the airbag 32. The control component 33 is used to control the inflation and deflation of the airbag 32, so as to adjust the sealing degree between the door 1 and the door frame 2. An auxiliary component 34 is provided on the door 1, and the auxiliary component 34 is communicated with the airbag 32. The auxiliary component 34 is used to deflate the airbag 32.

[0070] When in use, the control component 33 inflates the airbag 32, and the airbag 32 abuts against the door frame 2 after being inflated, thereby enhancing the sealing between the door 1 and the door frame 2. At the same time, the reinforcing mechanism can further increase the pressure in the airbag 32, thereby improving the airtightness between the door 1 and the door frame 2, and further improving the stability of the cold storage sealing device. When the door 1 needs to be opened, the airbag 32 is deflated by operating the auxiliary component 34, so that the pressure in the airbag 32 is reduced, and the airbag 32 no longer abuts against the door frame 2, which facilitates the opening of the door 1 and avoids the airbag 32 from being damaged during the opening of the door 1, which is beneficial to improving the stability of the cold storage sealing device.

[0071] Reference Figure 2 The control component 33 includes a mounting hole 331, which is provided at one end of the door 1 away from the hinged end; two limiting grooves 332 are symmetrically provided on the side wall of the mounting hole 331, and limiting blocks 333 are slidably installed in the two limiting grooves 332. The mounting hole 331 is provided with a piston 334, and the two limiting blocks 333 are symmetrically and fixedly installed on the piston 334. The diameter of the piston 334 is smaller than the diameter of the mounting hole 331; one end of the connecting rope 335 is connected to the end of the piston 334 away from the bottom wall of the mounting hole 331, and the other end of the connecting rope 335 is fixedly connected to the door frame 2; the door 1 is embedded in A connecting tube 336 is provided, one end of which is connected to the airbag 32, and the other end of the connecting tube 336 is connected to one end of the mounting hole 331 close to the bottom wall; a spring 337 is provided in the mounting hole 331, one end of the spring 337 is fixedly connected to the bottom wall of the mounting hole 331, and the other end of the spring 337 is fixedly connected to one end of the piston 334 close to the bottom wall of the mounting hole 331; a rubber pad 338 is fixedly installed on one end of the piston 334 close to the bottom wall of the mounting hole 331, and the rubber pad 338 is disc-shaped, and the diameter of the rubber pad 338 is larger than the diameter of the piston 334 and smaller than the diameter of the mounting hole 331.

[0072] When the door 1 is opened, the connecting rope 335 drives the piston 334 to slide in the mounting hole 331. During the sliding process of the piston 334, the spring 337 is stretched, and the gas in the airbag 32 is drawn into the mounting hole 331, so that the airbag 32 shrinks into the mounting groove 31. At this time, the door 1 can be easily opened; when the door 1 needs to be closed, the spring 337 is in a stretched state. Under the action of the spring 337, the piston 334 moves toward the bottom wall of the mounting hole 331. As the pressure in the airbag 32 increases, the pressure at the bottom of the mounting hole 331 also increases, causing the rubber pad 338 to deform and abut against the side wall of the mounting hole 331, thereby improving the inflation effect, thereby improving the sealing between the door 1 and the door frame 2, and improving the stability of the cold storage sealing device.

[0073] Reference Figure 3The auxiliary component 34 includes a pressure relief channel 341, which is opened on the door 1, one end of the pressure relief channel 341 is connected to the airbag 32, and the other end of the pressure relief channel 341 is connected to the outside world; a valve 342 is fixedly installed in the end of the pressure relief channel 341 away from the airbag 32, and the valve 342 can control the connection between the pressure relief channel 341 and the outside world; a first rotating shaft 343 is coaxially fixedly connected to the rotating shaft of the valve 342, and the first rotating shaft 343 is passed through the door 1.

[0074] When the air pressure in the airbag 32 is too high to open the door 1, the first rotating shaft 343 is rotated. The first rotating shaft 343 rotates to open the valve 342, so that the gas in the airbag 32 flows into the outside through the pressure relief channel 341. At this time, the airbag 32 is retracted into the installation groove 31, avoiding the situation where the cold storage door 1 is forcibly opened and the airbag 32 is damaged, thereby improving the stability of the cold storage sealing device.

[0075] Reference Figure 2 , Figure 4 and Figure 5 The reinforcing mechanism includes a connecting channel 41, which is opened on the door 1, and both ends of the connecting channel 41 are connected to the pressure relief channel 341; a sliding rod 42 is fixedly installed in the pressure relief channel 341, one end of the sliding rod 42 is located between the two points where the connecting channel 41 and the pressure relief channel 341 are connected, and the other end of the sliding rod 42 is far away from the valve 342; a screw 43 is rotatably installed in the pressure relief channel 341, one end of the screw 43 is located between the two points where the connecting channel 41 and the pressure relief channel 341 are connected, and the other end of the screw 43 is far away from the valve 342, and the screw 43 and the sliding rod are fixedly installed in the pressure relief channel 341. 42 are arranged in parallel; the sliding rod 42 is penetrated and slidably connected with a blocking block 44, the blocking block 44 is penetrated and threadedly connected to the screw 43, and the blocking block 44 can completely block the pressure relief channel 341; the screw 43 is coaxially fixedly connected with a first bevel gear 45, the first bevel gear 45 is meshed with a second bevel gear 47, the second bevel gear 47 is coaxially fixedly connected with a second rotating shaft 46, the second rotating shaft 46 is penetrated and rotatably installed on the door 1, and a locking assembly 48 is connected to the end of the second rotating shaft 46 away from the second bevel gear 47, and the locking assembly 48 is used to lock the second rotating shaft 46.

[0076] When the temperature of the cold storage is too low, the air in the airbag 32 shrinks, and the sealing between the door 1 and the door frame 2 is reduced, the second rotating shaft 46 is rotated, the second rotating shaft 46 drives the second bevel gear 47 to rotate, the second bevel gear 47 drives the first bevel gear 45 to rotate, the first bevel gear 45 drives the screw 43 to rotate, and the screw 43 rotates to move the block 44 away from the valve 342. When the block 44 continues to move away from the valve 342 after passing through the position where the connecting channel 41 is connected to the pressure relief channel 341, the block 44 pushes the gas in the pressure relief channel 341 into the airbag 32, so that the pressure in the airbag 32 is increased, thereby improving the sealing between the door 1 and the door frame 2, and improving the stability of the cold storage sealing device.

[0077] Reference Figure 5 The locking assembly 48 includes a baffle 481, which is fixedly connected to one end of the second rotating shaft 46 away from the second bevel gear 47; a set screw 482 is passed through and threadedly installed on the baffle 481, and the set screw 482 is arranged parallel to the second rotating shaft 46.

[0078] When the second rotating shaft 46 rotates to move the blocking block 44 to a proper position, the set screw 482 is rotated to make the set screw 482 contact the door 1 to prevent the second rotating shaft 46 from reversing, thereby improving the stability of the cold storage sealing device.

[0079] Reference Figure 1 The door 1 and the door frame 2 are both fixedly mounted with a damping hinge 5, and the damping hinge 5 enables the door 1 and the door frame 2 to be hinged.

[0080] The damping hinge 5 prevents the door 1 from impacting the door frame 2 during closing under the elastic force of the spring 337, causing deformation, thereby affecting the sealing between the door 1 and the door frame 2, and improving the stability of the cold storage sealing device.

[0081] Reference Figure 1 A torsion spring 6 is sleeved on the first rotating shaft 343 , one end of the torsion spring 6 is fixedly connected to the first rotating shaft 343 , and the other end of the torsion spring 6 is fixedly connected to the door 1 .

[0082] When the first rotating shaft 343 is rotated to open the valve 342 to deflate the airbag 32, the torsion spring 6 is deformed accordingly; when the door 1 is opened, the first rotating shaft 343 is automatically reset under the action of the torsion spring 6, and the pressure relief channel 341 is closed, avoiding the sealing between the door 1 and the door frame 2 being affected due to the operator forgetting to reset, thereby improving the stability of the cold storage sealing device.

[0083] Reference Figure 1 An avoidance groove 7 is provided on one end of the door frame 2 close to the mounting hole 331 , and one end of the connecting rope 335 away from the piston 334 is fixedly mounted on the side wall of the avoidance groove 7 .

[0084] The avoidance groove 7 prevents the connecting rope 335 from being squeezed by the door 1 and the door frame 2, which is beneficial to increasing the service life of the connecting rope 335 and further improving the stability of the cold storage sealing device.

[0085] The implementation principle of the automatic sealing device for a cold storage in the embodiment of the present application is as follows: when the door 1 needs to be opened, the first rotating shaft 343 is rotated, and the first rotating shaft 343 rotates the valve 342, so that the gas in the airbag 32 flows into the outside through the pressure relief channel 341, and the airbag 32 is now retracted into the mounting groove 31. When the door 1 is opened, the connecting rope 335 drives the piston 334 to slide in the mounting hole 331, and the spring 337 is stretched during the sliding process of the piston 334. When the door 1 needs to be closed, the spring 337 is in a stretched state, and under the action of the spring 337, the piston 334 moves toward the bottom wall of the mounting hole 331. As the pressure in the airbag 32 increases, the pressure at the bottom of the mounting hole 331 also increases, causing the rubber pad 338 to deform and abut against the side wall of the mounting hole 331, thereby improving the inflation effect. When the temperature of the cold storage is too low, the air in the airbag 32 shrinks, and the sealing between the door 1 and the door frame 2 is reduced, the second rotating shaft 46 is rotated, the second rotating shaft 46 drives the second bevel gear 47 to rotate, the second bevel gear 47 drives the first bevel gear 45 to rotate, the first bevel gear 45 drives the screw 43 to rotate, and the screw 43 rotates to move the block 44 away from the valve 342. When the block 44 continues to move away from the valve 342 after passing through the position where the connecting channel 41 is connected to the pressure relief channel 341, the block 44 pushes the gas in the pressure relief channel 341 into the airbag 32, so that the pressure in the airbag 32 is increased, thereby improving the sealing between the door 1 and the door frame 2, and improving the stability of the cold storage sealing device. The connecting rope 335 drives the piston 334 to slide in the mounting hole 331. During the sliding process of the piston 334, the spring 337 is stretched, and the gas in the airbag 32 is drawn into the mounting hole 331, so that the airbag 32 is retracted into the mounting groove 31. At this time, the door 1 can be easily opened; when the door 1 needs to be closed, the spring 337 is in a stretched state. Under the action of the spring 337, the piston 334 moves toward the bottom wall of the mounting hole 331. As the pressure in the airbag 32 increases, the pressure at the bottom of the mounting hole 331 also increases, causing the rubber pad 338 to deform and abut against the side wall of the mounting hole 331, thereby improving the inflation effect.

[0086] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cold storage automatic sealing device, characterized in that: The invention comprises a door frame (2) and a door (1), wherein the door frame (2) is embedded and fixedly mounted on the wall of a cold storage, one end of the door frame (2) is hinged to one end of the door (1), a sealing mechanism is provided on the door (1), and the sealing mechanism is used to enhance the sealing performance between the door frame (2) and the door (1), and a reinforcing mechanism is provided on the door (1), and the reinforcing mechanism is used to enhance the effect of the sealing mechanism; The sealing mechanism comprises: An installation groove (31), the installation groove (31) being arranged around four side walls where the door (1) and the door frame (2) abut against each other; An airbag (32), the airbag (32) being wound around and fixedly mounted in the mounting groove (31); a control component (33), the control component (33) being arranged on the door (1), the control component (33) being in communication with the airbag (32), the control component (33) being used to control the inflation and deflation of the airbag (32), thereby controlling the sealing performance between the door (1) and the door frame (2); An auxiliary component (34), wherein the auxiliary component (34) is arranged on the door (1), the auxiliary component (34) is in communication with the air bag (32), and the auxiliary component (34) is used to control the deflation of the air bag (32).

2. The cold storage automatic sealing device according to claim 1 is characterized in that: The control component (33) comprises: A mounting hole (331), the mounting hole (331) being formed on an end of the door (1) away from the hinge end; Two limiting grooves (332), both of which are arranged on the side wall of the mounting hole (331); Two limiting blocks (333), the two limiting blocks (333) correspond to the two limiting grooves (332) one by one and are slidably connected; A piston (334), wherein the two limit blocks (333) are fixedly connected to the side wall of the piston (334), the piston (334) is located in the mounting hole (331), and the diameter of the piston (334) is smaller than the diameter of the mounting hole (331); A connecting rope (335), one end of the connecting rope (335) is fixedly connected to the piston (334), and the other end of the connecting rope (335) is fixedly connected to the door frame (2); A connecting pipe (336), the connecting pipe (336) being embedded in the door (1), one end of the connecting pipe (336) being in communication with the air bag (32), and the other end of the connecting pipe (336) being in communication with an end of the mounting hole (331) close to the bottom wall; a spring (337), wherein the spring (337) is located in the mounting hole (331), one end of the spring (337) is fixedly connected to the piston (334), and the other end of the spring (337) is fixedly connected to the bottom wall of the mounting hole (331); A rubber pad (338), the rubber pad (338) is disc-shaped, the rubber pad (338) is fixedly mounted on one end of the piston (334) close to the bottom wall of the mounting hole (331), the diameter of the rubber pad (338) is larger than the diameter of the piston (334), and the diameter of the rubber pad (338) is smaller than the diameter of the mounting hole (331).

3. The automatic sealing device for cold storage according to claim 2, characterized in that: The auxiliary component (34) comprises: A pressure relief channel (341), wherein the pressure relief channel (341) is provided on the door (1), one end of the pressure relief channel (341) is in communication with the air bag (32), and the other end of the pressure relief channel (341) is in communication with the outside; A valve (342), wherein the valve (342) is fixedly installed in the pressure relief channel (341), and the valve (342) is capable of controlling the communication between the pressure relief channel (341) and the outside world; A first rotating shaft (343), wherein the first rotating shaft (343) is passed through the door (1), and the first rotating shaft (343) is fixedly connected to the rotating shaft of the valve (342).

4. The automatic sealing device for cold storage according to claim 3 is characterized in that: The reinforcing mechanism comprises: A connecting channel (41), wherein the connecting channel (41) is provided on the door (1), and both ends of the connecting channel (41) are in communication with the pressure relief channel (341); a slide rod (42), the slide rod (42) being fixedly mounted in the pressure relief channel (341), one end of the slide rod (42) being located between two points where the connecting channel (41) and the pressure relief channel (341) are connected, and the other end of the slide rod (42) being away from the valve (342); a screw rod (43), the screw rod (43) being rotatably mounted in the pressure relief channel (341), one end of the screw rod (43) being located between two points where the connecting channel (41) and the pressure relief channel (341) are connected, the other end of the screw rod (43) being away from the valve (342), and the sliding rod (42) being arranged in parallel with the screw rod (43); a blocking block (44), the blocking block (44) being passed through and slidably mounted on the sliding rod (42), the blocking block (44) being passed through and threadedly mounted on the screw rod (43), and the blocking block (44) being capable of completely blocking the pressure relief channel (341); A first bevel gear (45), the first bevel gear (45) being coaxially fixedly connected to the screw rod (43); a second rotating shaft (46), the second rotating shaft (46) being passed through and rotatably mounted on the door (1), one end of the second rotating shaft (46) being located in the pressure relief channel (341); a second bevel gear (47), the second bevel gear (47) being coaxially fixedly mounted on one end of the second rotating shaft (46) located at the pressure relief channel (341), the first bevel gear (45) being meshed with the second bevel gear (47); A locking assembly (48), wherein the locking assembly (48) is connected to an end of the second rotating shaft (46) away from the second bevel gear (47), and the locking assembly (48) is used to lock the second rotating shaft (46).

5. The cold storage automatic sealing device according to claim 4, characterized in that: The locking assembly (48) comprises: a baffle (481), the baffle (481) being fixedly connected to an end of the second rotating shaft (46) away from the second bevel gear (47); A set screw (482), wherein the set screw (482) is threadedly connected to the baffle (481), and the set screw (482) is arranged parallel to the second rotating shaft (46).

6. The automatic sealing device for cold storage according to claim 1 is characterized in that: The door (1) and the door frame (2) are both fixedly mounted with damping hinges (5), and the damping hinges (5) enable the door (1) and the door frame (2) to be hinged.

7. The automatic sealing device for cold storage according to claim 2 is characterized in that: A torsion spring (6) is sleeved on the first rotating shaft (343), one end of the torsion spring (6) is fixedly connected to the first rotating shaft (343), and the other end of the torsion spring (6) is fixedly connected to the door (1).

8. The automatic sealing device for cold storage according to claim 2 is characterized in that: An escape groove (7) is provided on one end of the door frame (2) close to the mounting hole (331), and one end of the connecting rope (335) away from the piston (334) is fixedly mounted in the escape groove (7).

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