A through-type vertical air circulation system for dense shelf freezer

Abstract

The application provides a kind of for dense shelf freezer passageway type vertical air circulation system, it is related to air circulation technical field, including: hollow base;Hollow base is placed at the opposite two sides wall of freezer respectively, hollow base bottom is connected with ventilation pipe, ventilation pipe is connected with two hollow bases;Hollow base top is installed with movable support in, and both ends of hollow base inside are connected with rotating roller;Hollow base inside is connected with transmission belt, and transmission belt is connected with movable support and rotating roller;The rotating shaft outside of rotating roller is equipped with movable lock sleeve.The application adopts passageway type vertical air circulation effect, can effectively eliminate the temperature dead angle in freezer, guarantee the consistency of each area temperature.Solve the current traditional dense shelf freezer, more horizontal air supply or local point type air supply mode, it is prone to blind area of air supply caused by shelf shielding, lead to cold air difficult to accurately cover each goods location area, cause temperature difference problem.

Description

Technical Field

[0001] This invention relates to the field of airflow circulation technology, and more particularly to a through-type vertical airflow circulation system for densely shelved cold storage. Background Technology

[0002] Cold storage, also known as refrigerated warehouse, is a special type of warehousing facility that uses artificial refrigeration technology to construct and maintain a stable low-temperature environment. Its core function is to continuously supply cold air to counteract the constant infiltration of external heat, maintaining a set low-temperature and constant-humidity state inside the warehouse, thereby extending the storage period of temperature-sensitive materials such as food, medicine, and biological products. Cold storage facilities are typically equipped with a professional airflow circulation system that uses forced air convection to maintain a uniform temperature in all areas, ensuring the quality stability and safety of all stored goods.

[0003] For example, the Chinese patent "CN114071971B Electronic Information Computer Room Airflow Circulation System" includes a cloud server, a user terminal, and an air purifier. The air purifier includes a housing, a filter plate inside the housing, and multiple cloth bags on one side of the filter plate. The housing has a partition with a first through groove. A connecting plate is located in the first through groove, and the cloth bags are placed on the connecting plate. A motor for driving the connecting plate to rotate is located on the top of the housing. An air inlet is located on one side wall of the housing, and an air outlet is located on the other side wall of the housing. Air passes through the housing and is treated by the cloth bags to remove dust, effectively removing dust from the air and preventing dust from re-entering the computer room and affecting the equipment inside, thus reducing dust in the computer room and ensuring the normal operation of the equipment.

[0004] Traditional cold storage facilities with dense shelving often use horizontal or localized point-to-point air supply. Because the horizontal flow path of cold air is relatively long, it is easily blocked by the layers of dense shelving, resulting in large-area air supply blind spots. This makes it difficult for cold air to accurately penetrate the gaps between the shelves and cover each storage area, causing significant temperature differences between different areas inside the cold storage. This seriously affects the low-temperature storage quality and safe storage effect of goods inside the cold storage. Summary of the Invention

[0005] This invention relates to a through-type vertical airflow circulation system for cold storage with dense racking, which solves the problem that the horizontal or localized point air supply methods commonly used in current cold storage with dense racking are easily blocked by the racks, resulting in blind spots in air supply. This makes it difficult for cold air to accurately cover each storage area, causing temperature differences and affecting the quality of goods stored at low temperatures inside the cold storage.

[0006] In a first aspect, this invention provides a through-type vertical airflow circulation system for a high-density shelving cold storage facility, specifically comprising: a hollow base, a ventilation duct, a movable support, a rotating roller, a transmission belt, a movable locking sleeve, a vertical air duct, bolts, and a circulating fan; the hollow bases are respectively placed on opposite side walls of the cold storage facility, and the bottom of the hollow base is connected to a ventilation duct, which is connected to the two hollow bases; a movable support is installed inside the top of the hollow base, and rotating rollers are connected to both ends inside the hollow base; a transmission belt is connected inside the hollow base, and the transmission belt is connected to the movable support and the rotating rollers; a movable locking sleeve is fitted outside the rotating shaft of the rotating roller, and the movable locking sleeve is connected to the outside of the hollow base; a vertical air duct is connected to the top of the movable support, and two bolts are connected to the outside of the vertical air duct; a circulating fan is installed outside the vertical air duct.

[0007] Furthermore, the bottom of the vertical air duct is connected to the movable support, and the bottom of the movable support is connected to the hollow base. The circulating fan is located at the air outlet of one of the vertical air ducts, and a magnetically adsorbed filter is installed at the air outlet of the other vertical air duct.

[0008] Furthermore, the hollow base is equipped with an air guide port on the outside. The air guide port is connected to an air guide port on another hollow base through a ventilation pipe. The ventilation pipe is located in a sunken trench pre-set in the cold storage floor. Air near one side wall of the cold storage is filtered by a filter and enters the ventilation pipe. It is gradually transported along the ventilation pipe to the opposite side wall of the cold storage and then blown out by a circulating fan, thus forming a through-type vertical airflow circulation effect inside the cold storage.

[0009] Furthermore, the vertical air duct is rotatably connected to the movable support. The bottom of the vertical air duct is symmetrically provided with arc-shaped movable holes, and the top of the movable support is symmetrically provided with fixed blocks. The fixed blocks are slidably connected in the arc-shaped movable holes. The vertical air duct can rotate at an angle of -15° to 15°, which can adaptively adjust the rotation according to the differences in the dense shelving layout inside the cold storage, flexibly change the direction of the direct airflow, effectively eliminate the blind spots in air delivery caused by the shelving, and ensure that the cold air accurately covers each storage area.

[0010] Furthermore, the bottom of the vertical air duct is symmetrically provided with screw holes, and the bolts are threaded into the screw holes. The ends of the bolts contact the outside of the movable support. After the vertical air duct is rotated and adjusted, the bolts are tightened so that the ends of the bolts are in close contact with the outside of the movable support, and the vertical air duct is fixed by the bolts.

[0011] Furthermore, the top of the hollow base is equipped with an adjustment port, and the movable support is slidably connected to the adjustment port. The movable support can be slidably adjusted according to the different layouts of the dense shelves inside the cold storage, so that the direction of the airflow is precisely aligned with the aisle between the shelves, effectively avoiding the obstruction of the airflow by the shelves, thereby maximizing the effect of the through-hall vertical airflow circulation.

[0012] Furthermore, the two ends of the transmission belt are fixedly connected to the two ends of the movable support, and the two ends of the transmission belt are located at the adjustment port. The rotating roller is rotatably connected to the hollow base, and the transmission belt is connected to the two rotating rollers. During the sliding adjustment of the movable support, the movable support drives the transmission belt to move, and the transmission belt drives the two rotating rollers to rotate, thus forming a dynamic seal on the adjustment port at the top of the hollow base using the transmission belt.

[0013] Furthermore, guide blocks are symmetrically arranged on the outside of the rotating shaft of the roller, the movable locking sleeve is slidably connected to the rotating shaft of the roller, and sliding holes are symmetrically arranged on the outside of the movable locking sleeve. The guide blocks are slidably connected in the sliding holes. Through the sliding cooperation between the guide blocks and the sliding holes, the movement of the movable locking sleeve is precisely guided, effectively preventing the movable locking sleeve from twisting or shifting during movement.

[0014] Furthermore, the hollow base is surrounded by a positioning groove, and the movable locking sleeve is surrounded by an insert block, which is inserted into the positioning groove.

[0015] Furthermore, a spring is fitted outside the rotating shaft of the roller. One end of the spring contacts the end of the rotating shaft of the roller, and the other end of the spring contacts the movable locking sleeve. The spring applies an elastic restoring force to the movable locking sleeve. After the movable support is slidably adjusted to the required position, the movable locking sleeve is released. Under the elastic thrust of the spring, the movable locking sleeve automatically resets and moves, so that the insert block is accurately inserted into the corresponding positioning groove. The movable locking sleeve is used to lock and fix the roller, ensuring the stability of the movable support in use.

[0016] This invention provides a through-passage vertical airflow circulation system for high-density shelving cold storage, which has the following beneficial effects: When in use, the air near one side of the cold storage is filtered by a filter and then enters the ventilation duct. It is gradually transported along the ventilation duct to the opposite side of the cold storage and then blown out by a circulating fan, thus creating a through-draft vertical airflow circulation effect inside the cold storage. This circulation method is suitable for dense shelving layouts and can effectively eliminate temperature dead zones inside the cold storage, ensuring temperature consistency in all areas and thus ensuring the low-temperature storage quality of goods inside the cold storage.

[0017] In addition, by using the sliding cooperation between the fixed block and the arc-shaped movable hole, the rotation angle of the vertical air duct is limited. It can adaptively adjust the rotation according to the differences in the dense shelving layout inside the cold storage, flexibly change the direction of the direct airflow, effectively eliminate the blind spots in air delivery caused by shelving obstruction, and ensure that the cold air accurately covers each storage area, thereby better meeting the actual use needs in different application scenarios. After the vertical air duct is rotated and adjusted, tighten the bolts so that the bolt ends are in close contact with the outside of the movable support. The vertical air duct is fixed by the bolts to ensure the stability of the vertical air duct.

[0018] Furthermore, the movable support can be slidably adjusted according to the different layouts of the dense shelving inside the cold storage, so that the direct airflow is precisely aligned with the aisle between the shelves, effectively avoiding the obstruction of airflow by the shelves, thereby maximizing the effect of the through-hall vertical airflow circulation, ensuring smooth circulation of cold air in each shelf aisle, and ensuring uniform temperature in all areas of the cold storage; during the sliding adjustment of the movable support, the movable support drives the transmission belt to move, and the transmission belt drives the two rotating rollers to rotate, using the transmission belt to form a dynamic seal on the adjustment port at the top of the hollow base, effectively preventing cross-leakage of internal and external air, thereby ensuring the high efficiency and stability of airflow circulation.

[0019] Furthermore, the sliding engagement between the guide block and the sliding hole precisely guides the movement of the movable locking sleeve, effectively preventing twisting or offset during movement and ensuring smooth sliding along the predetermined trajectory. This guarantees the smoothness and reliability of the movable locking sleeve's transition between locked and unlocked states. A spring applies an elastic restoring force to the movable locking sleeve. Once the movable support has slid to the desired position, releasing the movable locking sleeve allows it to automatically reset under the spring's elastic thrust, precisely inserting the insert into the corresponding positioning slot. The movable locking sleeve then locks and fixes the rotating roller, effectively ensuring the stability and reliability of the movable support during use. When the position of the movable support needs adjustment, pushing the movable locking sleeve in the opposite direction compresses the spring, causing the insert to disengage from the positioning slot and the rotating roller to unlock. This allows for adaptive sliding adjustment of the movable support. The entire operation is simple and quick, requiring no additional tools, significantly improving convenience and work efficiency.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0023] In the attached diagram: Figure 1 This paper presents an overall axonometric structural schematic diagram of the through-passage vertical airflow circulation system for high-density shelving cold storage of this application; Figure 2 This paper presents an axial structural schematic diagram of the overall through-passage vertical airflow circulation system for dense shelving cold storage, taken from another angle. Figure 3A schematic diagram of the hollow base, ventilation duct, and movable support connection structure of the through-passage vertical airflow circulation system for high-density shelving cold storage of this application is shown. Figure 4 This paper shows a schematic diagram of the internal roller installation structure of the hollow base of the through-passage vertical airflow circulation system for high-density shelving cold storage according to this application. Figure 5 A schematic diagram of the rotating roller, movable locking sleeve, and spring split structure of the through-passage vertical airflow circulation system for high-density shelving cold storage of this application is shown. Figure 6 A schematic diagram of the movable locking sleeve axial structure of the through-passage vertical airflow circulation system for high-density shelving cold storage of this application is shown. Figure 7 A schematic diagram of the connection structure of the movable support, vertical air duct and circulating fan of the through-passage vertical airflow circulation system for dense shelving cold storage of this application is shown. Figure 8 A schematic diagram of the disassembled structure of the movable support, vertical air duct, and circulating fan of the through-passage vertical airflow circulation system for dense shelving cold storage of this application is shown.

[0024] Figure label: 1. Hollow base; 101. Flow guide; 102. Adjustment port; 103. Positioning groove; 2. Ventilation pipe; 3. Movable support; 301. Fixed block; 4. Rotary roller; 401. Guide block; 5. Transmission belt; 6. Movable locking sleeve; 601. Sliding hole; 602. Insert block; 7. Spring; 8. Vertical air duct; 801. Arc-shaped movable hole; 802. Screw hole; 803. Filter screen; 9. Bolt; 10. Circulating fan. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please refer to Figures 1 to 8 Example 1: This invention proposes a through-type vertical airflow circulation system for a high-density shelving cold storage, comprising: a hollow base 1, a ventilation duct 2, a movable support 3, a rotating roller 4, a transmission belt 5, a movable locking sleeve 6, a vertical air duct 8, bolts 9, and a circulating fan 10; the hollow base 1 is placed on opposite side walls of the cold storage, and the bottom of the hollow base 1 is connected to the ventilation duct 2, which is connected to the two hollow bases 1; the movable support 3 is installed inside the top of the hollow base 1, and the rotating roller 4 is connected to both ends inside the hollow base 1; the transmission belt 5 is connected inside the hollow base 1, and the transmission belt 5 is connected to the movable support 3 and the rotating roller 4; the rotating shaft of the rotating roller 4 is fitted with a movable locking sleeve 6, which is connected to the outside of the hollow base 1; the top of the movable support 3 is connected to the vertical air duct 8, and two bolts 9 are connected to the outside of the vertical air duct 8; a circulating fan 10 is installed outside the vertical air duct 8.

[0027] In this embodiment, the bottom of the vertical air duct 8 is connected to the movable support 3, the bottom of the movable support 3 is connected to the hollow base 1, the circulating fan 10 is located at the air outlet of one of the vertical air ducts 8, the air outlet of the other vertical air duct 8 is equipped with a magnetic adsorption filter 803, the hollow base 1 is provided with a guide port 101 on the outside, the guide port 101 is connected to the guide port 101 of the other hollow base 1 through the ventilation pipe 2, and the ventilation pipe 2 is located in the sunken trench preset on the cold storage floor; Using the above technical solution, the air near one side of the cold storage is filtered by filter 803 and then enters the ventilation duct 2. It is gradually transported along the ventilation duct 2 to the opposite side of the cold storage and then blown out by the circulating fan 10, thus forming a through-type vertical airflow circulation effect inside the cold storage. This circulation method is suitable for dense shelving layouts and can effectively eliminate temperature dead zones inside the cold storage, ensure the consistency of temperature in each area, and thus ensure the low-temperature storage quality of goods inside the cold storage.

[0028] In this embodiment, the vertical air duct 8 is rotatably connected to the movable support 3. The bottom of the vertical air duct 8 is symmetrically provided with an arc-shaped movable hole 801, and the top of the movable support 3 is symmetrically provided with a fixed block 301. The fixed block 301 is slidably connected in the arc-shaped movable hole 801. The rotation angle of the vertical air duct 8 is -15° to 15°. By adopting the above technical solution, the rotation angle of the vertical air duct 8 is limited by the sliding cooperation between the fixed block 301 and the arc-shaped movable hole 801. It can adaptively adjust the rotation according to the differences in the dense shelf layout inside the cold storage, flexibly change the direction of the direct airflow, effectively eliminate the blind spot caused by the shelf obstruction, and ensure that the cold air accurately covers each storage area, thereby better meeting the actual use needs under different application scenarios.

[0029] In this embodiment, the bottom of the vertical air duct 8 is symmetrically provided with screw holes 802, and the bolt 9 is threaded into the screw holes 802, with the end of the bolt 9 contacting the outside of the movable support 3. Using the above technical solution, after the vertical air duct 8 has been rotated and adjusted, tighten the bolt 9 so that the end of the bolt 9 is in close contact with the outside of the movable support 3, and fix the vertical air duct 8 by the bolt 9 to ensure the stability of the vertical air duct 8.

[0030] In this embodiment, the hollow base 1 is provided with an adjustment port 102 at the top, and the movable support 3 is slidably connected to the adjustment port 102. By adopting the above technical solution, the movable support 3 can be slidably adjusted according to the differences in the dense shelving layout inside the cold storage, so that the direction of the airflow is precisely aligned with the aisle between the shelves, effectively avoiding the obstruction of airflow by the shelves, thereby maximizing the effect of the through-hall vertical airflow circulation, ensuring that the cold air flows smoothly in each shelf aisle, and ensuring that the temperature in each area of ​​the cold storage is uniform.

[0031] In this embodiment, the two ends of the transmission belt 5 are fixedly connected to the two ends of the movable support 3, the two ends of the transmission belt 5 are located at the adjustment port 102, the rotating roller 4 is rotatably connected to the hollow base 1, and the transmission belt 5 is connected to the two rotating rollers 4 in a transmission connection. Using the above technical solution, during the sliding adjustment of the movable support 3, the movable support 3 drives the transmission belt 5 to move, and the transmission belt 5 drives the two rotating rollers 4 to rotate. The transmission belt 5 forms a dynamic seal on the top adjustment port 102 of the hollow base 1, which effectively avoids cross-leakage of internal and external air, thereby ensuring the high efficiency and stability of airflow circulation.

[0032] In Example 2, based on Example 1, guide blocks 401 are symmetrically arranged on the outside of the rotating shaft of the rotating roller 4, the movable locking sleeve 6 is slidably connected to the rotating shaft of the rotating roller 4, and sliding holes 601 are symmetrically arranged on the outside of the movable locking sleeve 6, with the guide blocks 401 slidably connected in the sliding holes 601. By adopting the above technical solution, the sliding cooperation between the guide block 401 and the sliding hole 601 plays a precise guiding role in the movement of the movable locking sleeve 6, effectively preventing the movable locking sleeve 6 from twisting or shifting during the movement, ensuring that it slides smoothly along the predetermined trajectory, thereby ensuring the smoothness and reliability of the movable locking sleeve 6 in switching between the locked and unlocked states.

[0033] In this embodiment, a positioning groove 103 is provided around the hollow base 1, and an insert 602 is provided around the movable locking sleeve 6. The insert 602 is inserted into the positioning groove 103. A spring 7 is fitted around the rotating shaft of the rotating roller 4. One end of the spring 7 contacts the end of the rotating shaft of the rotating roller 4, and the other end of the spring 7 contacts the movable locking sleeve 6. Using the above technical solution, the spring 7 applies an elastic restoring force to the movable locking sleeve 6. After the movable support 3 is slidably adjusted to the required position, the movable locking sleeve 6 is released. Under the elastic thrust of the spring 7, the movable locking sleeve 6 automatically resets and moves, so that the insert 602 is accurately inserted into the corresponding positioning groove 103. The movable locking sleeve 6 is used to lock and fix the rotating roller 4, thereby effectively ensuring the stability and reliability of the movable support 3 in the use state. When the position of the movable support 3 needs to be adjusted, the movable locking sleeve 6 is pushed in the opposite direction, the spring 7 is compressed and contracted, and the insert 602 is disengaged from the positioning groove 103. The rotating roller 4 is unlocked, and the movable support 3 can be adjusted by adaptive sliding. The whole operation process is simple and quick, without the need for additional tools, which greatly improves convenience and work efficiency.

[0034] The working principle of this embodiment is as follows: Air near one wall of the cold storage is filtered by filter 803 and enters the ventilation duct 2. It is then gradually transported along the ventilation duct 2 to the opposite wall of the cold storage, and finally blown out by the circulating fan 10, thus creating a through-draft vertical airflow circulation effect inside the cold storage. This circulation method is suitable for dense shelving layouts and can effectively eliminate temperature dead zones inside the cold storage, ensuring temperature consistency in all areas. The fixed block 301 and the arc-shaped movable hole 801 slide together to limit the rotation angle of the vertical air duct 8. This allows for adaptive rotation adjustment based on the differences in the dense shelving layout inside the cold storage, flexibly changing the direction of the direct airflow and effectively eliminating blind spots caused by shelving obstruction, ensuring precise cold air coverage to each storage area. After the vertical air duct 8 has been rotated and adjusted, the bolt 9 is tightened so that the end of the bolt 9 is in close contact with the outside of the movable support 3, fixing the vertical air duct 8 and ensuring its stability. The movable support 3 can be adjusted according to the differences in the dense shelving layout inside the cold storage. The movable support 3 is slidably adjusted so that the airflow is precisely aligned with the aisle between the shelves, effectively avoiding obstruction of the airflow by the shelves, thereby maximizing the vertical airflow circulation effect and ensuring smooth flow of cold air in each shelf aisle. Spring 7 applies an elastic restoring force to the movable locking sleeve 6. After the movable support 3 is slidably adjusted to the desired position, the movable locking sleeve 6 is released. Under the elastic thrust of spring 7, the movable locking sleeve 6 automatically returns to its original position, allowing the insert 602 to precisely insert into the corresponding positioning groove 103. The movable locking sleeve 6 then locks and fixes the rotating roller 4, effectively ensuring the stability and reliability of the movable support 3 in use. When the position of the movable support 3 needs to be adjusted, the movable locking sleeve 6 is pushed in the opposite direction, the spring 7 is compressed and contracted, and the insert 602 disengages from the positioning groove 103, releasing the rotating roller 4. This allows for adaptive sliding adjustment of the movable support 3. The entire operation is simple and quick, requiring no additional tools, greatly improving convenience and work efficiency.

[0035] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0036] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0037] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A through-passage vertical airflow circulation system for high-density shelving cold storage, comprising: Hollow base (1), ventilation pipe (2), movable support (3), rotating roller (4), transmission belt (5), movable locking sleeve (6), vertical air duct (8), bolt (9), and circulating fan (10); characterized in that the hollow base (1) is placed on opposite side walls of the cold storage, the bottom of the hollow base (1) is connected to the ventilation pipe (2), and the ventilation pipe (2) is connected to the two hollow bases (1); the top of the hollow base (1) is equipped with a movable support (3), and the hollow base (1) The hollow base (1) is connected to a rotating roller (4) at both ends; a transmission belt (5) is connected inside the hollow base (1), and the transmission belt (5) is connected to the movable support (3) and the rotating roller (4); a movable locking sleeve (6) is fitted on the outside of the rotating shaft of the rotating roller (4), and the movable locking sleeve (6) is connected to the outside of the hollow base (1); a vertical air duct (8) is connected to the top of the movable support (3), and two bolts (9) are connected to the outside of the vertical air duct (8); a circulating fan (10) is installed on the outside of the vertical air duct (8).

2. The through-passage vertical airflow circulation system for high-density shelving cold storage according to claim 1, characterized in that, The bottom of the vertical air duct (8) is connected to the movable support (3), the bottom of the movable support (3) is connected to the hollow base (1), the circulating fan (10) is located at the air outlet of one of the vertical air ducts (8), and a magnetic adsorption filter (803) is installed at the air outlet of the other vertical air duct (8).

3. The through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The hollow base (1) is provided with a flow guide (101) on the outside. The flow guide (101) is connected to the flow guide (101) of another hollow base (1) through a ventilation pipe (2). The ventilation pipe (2) is located in a sunken trench pre-set on the ground of the cold storage.

4. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The vertical air duct (8) is rotatably connected to the movable support (3). The bottom of the vertical air duct (8) is symmetrically provided with an arc-shaped movable hole (801), and the top of the movable support (3) is symmetrically provided with a fixed block (301). The fixed block (301) is slidably connected in the arc-shaped movable hole (801). The rotation angle of the vertical air duct (8) is -15° to 15°.

5. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The vertical air duct (8) has symmetrically arranged screw holes (802) at the bottom, and the bolts (9) are threaded into the screw holes (802), with the ends of the bolts (9) contacting the outside of the movable support (3).

6. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The hollow base (1) has an adjustment port (102) at the top, and the movable support (3) is slidably connected to the adjustment port (102).

7. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 6, characterized in that, The two ends of the transmission belt (5) are fixedly connected to the two ends of the movable support (3). The two ends of the transmission belt (5) are located at the adjustment port (102). The rotating roller (4) is rotatably connected to the hollow base (1). The transmission belt (5) is connected to the two rotating rollers (4) in a transmission connection.

8. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The rotating roller (4) has guide blocks (401) symmetrically arranged on the outside of the rotating shaft. The movable locking sleeve (6) is slidably connected to the rotating shaft of the rotating roller (4). The movable locking sleeve (6) has sliding holes (601) symmetrically arranged on the outside of the movable locking sleeve (6). The guide blocks (401) are slidably connected in the sliding holes (601).

9. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The hollow base (1) is surrounded by a positioning groove (103), and the movable locking sleeve (6) is surrounded by a plug (602), which is inserted into the positioning groove (103).

10. A through-passage vertical airflow circulation system for a high-density shelving cold storage facility according to claim 1, characterized in that, The rotating shaft of the roller (4) is fitted with a spring (7), one end of the spring (7) is in contact with the end of the rotating shaft of the roller (4), and the other end of the spring (7) is in contact with the movable locking sleeve (6).

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