A spiral freezer with multiple circulating flow fields and a method for regulating the same

Abstract

This invention relates to a spiral quick-freezing machine with multiple circulating flow fields and its adjustment method, comprising a hopper, a conveying system, and an air source; an air guide plate is arranged outside the conveying system, dividing the hopper into an inner and outer section; a partition is arranged outside the air guide plate, dividing the hopper into an upper and lower section; the air source is arranged on the partition, with the air outlet located in the upper section and the air inlet in the lower section; a first air inlet, a second air inlet, a third air inlet, a first air outlet, and a second air outlet are provided on the air guide plate, with the first air inlet, second air inlet, and first air outlet all located above the partition, and the third air inlet and second air outlet located below the partition; a circulating air vent is arranged on the partition near the first air outlet. By setting multiple air vents, two circulating flow fields are formed. Under single-space conditions, the form of the flow field is changed by controlling the opening and closing of the air vents, thereby achieving the selection of a suitable flow field under different operating conditions.

Description

Technical Field

[0001] This invention relates to the field of circulating flow field devices, and in particular to a spiral quick-freezing machine with multiple circulating flow fields and its adjustment method. Background Technology

[0002] With scientific progress and social development, the energy efficiency, multi-condition adaptability, and space utilization of equipment in the food processing and logistics storage fields are receiving increasing attention. Currently, ensuring the functionality of equipment in processes such as food proofing, cooling, quick-freezing, and logistics transportation sterilization requires the following basic measures:

[0003] 1. In situations where rapid evaporation and heat exchange are required but there is sufficient space, a flow field with direct side airflow is generally chosen.

[0004] 2. In applications where the heat exchange product is not large but the usable space is small, a top-blowing airflow pattern is generally selected.

[0005] 3. When different working conditions are required, new flow field devices will be built;

[0006] On the one hand, the flow field with side direct airflow has relatively high heat exchange efficiency, but low space utilization.

[0007] On the other hand, top-inlet airflow has high space utilization, but relatively low heat exchange efficiency.

[0008] Different products require different operating conditions. Choosing the right operating conditions can ensure product quality, but building two flow fields can easily result in large space occupation and cause the equipment to be idle. Summary of the Invention

[0009] To address the above problems, this invention provides a spiral quick-freezing machine with multiple circulating flow fields and its adjustment method.

[0010] The technical solution adopted by this invention to solve its technical problem is:

[0011] The present invention provides a spiral quick-freezing machine with multiple circulating flow fields, including a chamber, a conveying system disposed in the chamber, and an air source for conveying airflow to the conveying system;

[0012] An air guide plate is provided on the outside of the conveying system, which divides the warehouse into an inner and an outer part. A partition is provided on the outside of the air guide plate, which divides the warehouse into an upper and a lower part. The air source is provided on the partition, with the air outlet of the air source located in the upper part and the air inlet of the air source located in the lower part.

[0013] The air guide plate is provided with a first air inlet, a second air inlet, a third air inlet, a first air outlet, and a second air outlet. The first air inlet, the second air inlet, and the first air outlet are all located above the partition plate, while the third air inlet and the second air outlet are located below the partition plate. The first air inlet is located near the top of the storage body, the second air inlet is located near the partition plate, and the second air outlet is located near the bottom of the storage body.

[0014] A recirculating air vent is provided on the partition near the first air outlet;

[0015] Baffles are provided on the first air inlet, the second air inlet, the third air inlet, the first air outlet, and the second air outlet. Each baffle can be opened or closed. Different circulating flow fields are formed by adjusting the opening and closing of different baffles.

[0016] More specifically, guide rails are provided on the storage body and partitions, and the baffles are all set on the guide rails and can move on the guide rails to open or close the air vents.

[0017] More specifically, the guide rail includes a first guide rail, a second guide rail, a third guide rail, a fourth guide rail, and a fifth guide rail;

[0018] The baffle of the first air inlet is connected to the first guide rail, the baffle of the second air inlet is connected to the third guide rail, the baffle of the third air inlet is connected to the second guide rail, the baffle of the first air outlet is connected to the fourth guide rail, and the baffle of the second air outlet is connected to the fifth guide rail.

[0019] The first guide rail is disposed at the top of the storage body, the second guide rail is disposed at the bottom of the storage body or below the partition, the third and fourth guide rails are both disposed on the partition, and the fifth guide rail is disposed at the bottom of the storage body or below the partition.

[0020] More specifically, the second air inlet is positioned close to the air source, and the first air outlet is positioned opposite to the second air inlet;

[0021] The third air inlet is positioned opposite to the second air outlet.

[0022] More specifically, the partition is provided with a guide plate for guiding airflow. The guide plate is arranged along the axial direction of the conveying system. Two guide plates are provided, and both guide plates are arranged facing the air source. The first air inlet and the second air inlet are both arranged between the two guide plates.

[0023] More specifically, both ends of the guide plate abut against the container body.

[0024] More specifically, a heat exchange / disinfection device is installed at the air inlet of the air source.

[0025] More specifically, the height ratio of the upper part to the lower part of the library body is set to 2:1 or 1:2.

[0026] More specifically, the second air inlet is configured as a plurality of small air holes arranged in an array, and the structure of the third air inlet, the first air outlet and the second air outlet is the same as that of the second air inlet.

[0027] A method for adjusting a spiral quick-freezing machine with multiple circulating flow fields, the method including a side-inlet circulating flow field or a top-inlet circulating flow field;

[0028] The side air intake circulation flow field is as follows: when the first air inlet is closed, the airflow from the air source enters the internal space through the second air inlet, flows along the circumference of the conveying system, and flows from the first air outlet to the external space. Then it enters the lower space through the circulation air inlet, enters the internal space through the third air inlet, and finally flows from the second air outlet to the air source air inlet.

[0029] The top air intake circulation flow field is as follows: the second air inlet, the first air outlet and the third air inlet are closed, the airflow from the air source moves upward along the air guide plate, enters the internal space through the first air inlet, moves downward along the axis of the conveying system, and flows from the second air outlet to the air source inlet.

[0030] The beneficial effects of this invention are: by setting multiple air vents to form two circulating flow fields, under single-space conditions, the form of the flow field can be changed by controlling the opening and closing of the air vents, so as to achieve the selection of a suitable flow field under different working conditions. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the side air intake flow field of the present invention. Figure 1 ;

[0032] Figure 2 This is a three-dimensional structural diagram of the side air intake flow field of the present invention. Figure 2 ;

[0033] Figure 3 This is a three-dimensional structural diagram of the side air intake flow field conveying system, air guide plate, and baffle plate of the present invention.

[0034] Figure 4 This is a three-dimensional structural diagram of the top air intake flow field of the present invention. Figure 1 ;

[0035] Figure 5 This is a three-dimensional structural diagram of the top air intake flow field of the present invention. Figure 2 ;

[0036] Figure 6This is a three-dimensional structural diagram of the conveying system, air guide plate, and baffle plate of the top air inlet flow field of the present invention.

[0037] Figure 7 This is a three-dimensional structural diagram of the air guide plate, baffle, and guide rail of the present invention.

[0038] In the diagram: 1. Conveying system; 2. Air guide plate; 21. First air inlet; 22. Second air inlet; 23. Third air inlet; 24. First side; 25. Second side; 26. Third side; 27. Fourth side; 28. First air outlet; 29. ​​Second air outlet; 20. Small air hole; 3. Partition plate; 31. Circulating air outlet; 41. First guide plate; 42. Second guide plate; 5. Air source; 6. Guide rail; 7. Heat exchange / disinfection device; 8. Storage body; 9. Baffle. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described 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 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.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The direction of movement is also relative and is not limited to an absolute direction of movement. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0042] A spiral quick-freezing machine with multiple circulating flow fields, such as Figures 1-7As shown, it includes a storage body 8, a conveying system 1 installed inside the storage body 8, and an air source 5 for conveying airflow to the conveying system 1.

[0043] The air source 5 is located on one side of the conveying system 1, and the air outlet of the air source 5 is directed toward the conveying system 1 to deliver airflow.

[0044] The conveying system is configured as a spiral self-stacking structure. An air guide plate 2 is provided on the outside of the conveying system 1. The air guide plate 2 is arranged in a ring shape and is sleeved on the outer periphery of the conveying system 1. The inlet and outlet of the conveying system extend out of the air guide plate. The air guide plate 2 divides the silo body 8 into an inner and an outer space. The conveying system 1 is located in the inner space, and the air source 5 is located in the outer space. In order to ensure better cooling, disinfection or heat exchange of the conveying system 1, the air guide plate 2 abuts against the silo body 8 to form a sealed space.

[0045] The airflow blown out by the air source 5 needs to enter the internal space to cool, disinfect, or exchange heat for the conveying system 1. Therefore, an air inlet and an air outlet are provided on the air guide plate 2. However, in order to form multiple circulating flow fields, in this scheme, a first air inlet 21, a second air inlet 22, a third air inlet 23, a first air outlet 28, and a second air outlet 29 are provided on the air guide plate 2. The second air inlet 22, the first air outlet 28, the third air inlet 23, and the second air outlet 29 work together to form a side air intake circulating flow field. The first air inlet 21 and the second air outlet 29 work together to form a top air intake circulating flow field. At the same time, the side air intake flow field and the top air intake flow field are satisfied in one device. The appropriate flow field can be selected according to different working conditions to ensure product quality.

[0046] Furthermore, to ensure that the airflow does not move downwards when entering the internal space from the first or second air inlet, a partition 3 is provided on the outside of the air guide plate 2. The partition 3 divides the storage body 8 into an upper and lower part. The air source 5 is located on the partition 3, with its outlet in the upper part and its inlet in the lower part. The height ratio of the upper and lower parts is set to 2:1 or 1:2. By setting different heights for the upper and lower parts, the airflow in the air inlet and return air areas can be adjusted. In different application scenarios, selecting an appropriate airflow and velocity can achieve the best heat exchange effect.

[0047] The first air inlet 21, the second air inlet 22 and the first air outlet 28 are all located above the partition 3, and the third air inlet 23 and the second air outlet 29 are located below the partition 3. When the airflow flows toward the first air inlet 21 or the second air inlet 22, it will not flow into the lower space due to the obstruction of the partition 3.

[0048] The first air inlet 21 is located near the top of the storage body 8, so that the airflow enters from the top of the conveying system 1, which facilitates the formation of a top-inlet circulating flow field, and flows downward along the axial direction of the conveying system 1 until it reaches the bottom of the system and flows out from the second air outlet 29.

[0049] The second air inlet 22 is located near the partition 3, and the first air outlet 28 is located near the partition 3. The first air outlet 28 and the second air inlet 22 are positioned opposite each other. Furthermore, the first air outlet 28 and the second air inlet 22 are located on the same horizontal plane so that after the airflow enters the internal space from the second air inlet 22, it moves circumferentially along the conveying system 1 and then flows out from the first air outlet 28, allowing the airflow to flow comprehensively through the conveying system 1 in the upper space. The third air inlet 23 is located near the partition 3 or the bottom of the storage body 8, and the second air outlet 29 is located near the bottom of the storage body 8 or the partition 3. The third air inlet 23 and the second air outlet 29 are positioned opposite each other. Furthermore, the third air inlet 23 and the second air outlet 29 are located on the same horizontal plane so that after the airflow enters the internal space from the third air inlet 23, it moves circumferentially along the conveying system 1 and then flows out from the second air outlet 29, allowing the airflow to flow comprehensively through the conveying system 1 in the lower space, thus forming a side-entry circulating flow field.

[0050] Different needs require different circulating flow fields. To ensure the smooth operation of various circulating flow fields, baffles 9 are installed on the first air inlet 21, the second air inlet 22, the third air inlet 23, the first air outlet 28, and the second air outlet 29. Each baffle 9 can open or close a certain air outlet, opening the corresponding air outlet when performing the corresponding circulating flow field. For ease of operation, handles are provided on the baffles 9.

[0051] To ensure the baffle 9 can open and close freely, guide rails 6 are provided on both the storage body 8 and the partition 3. The guide rails 6 can be annular and coaxially aligned with the air guide plate 2, or they can be arc-shaped and also coaxially aligned with the air guide plate 2. Because there are many baffles 9, guide rails 6 are provided at the top and bottom of the storage body 8, and above and below the partition 3. Furthermore, the guide rails 6 include a first guide rail, a second guide rail, a third guide rail, a fourth guide rail, and a fifth guide rail. The baffle 9 of the first air inlet 21 is connected to the first guide rail. Next, the baffle 9 of the second air inlet 22 is connected to the third guide rail, the baffle 9 of the third air inlet 23 is connected to the second guide rail, the baffle 9 of the first air outlet 28 is connected to the fourth guide rail, and the baffle 9 of the second air outlet 29 is connected to the fifth guide rail. The first guide rail is located at the top of the storage body 8, the second guide rail is located at the bottom of the storage body 8 or below the partition 3, the third and fourth guide rails are both located on the partition 3, and the fifth guide rail is located at the bottom of the storage body 8 or below the partition 3. When the guide rails 6 are arranged in a ring, the third and fourth guide rails are set as the same guide rail.

[0052] The baffle 9 can rotate on the guide rail 6. When it is necessary to open the corresponding air vent, the baffle 9 can be rotated so that it coincides with one side of the air guide plate 2. This will not affect the air vents in other positions, nor will it increase the floor space.

[0053] The guide rail includes a first plate, a second plate, and a third plate arranged sequentially and at intervals. A nylon wheel is disposed between any two adjacent plates. Bolts are disposed sequentially through the first plate, the nylon wheel, the second plate, the nylon wheel, and the third plate to secure them together. The nylon wheel allows the baffle 9 to rotate along the guide rail 6, reducing friction.

[0054] Furthermore, the air guide plate 2 includes a first surface 24, a second surface 25, a third surface 26 and a fourth surface 27 that are connected in sequence and arranged in a ring. The first surface 24 is arranged facing the air source 5, and the third surface 26 is arranged opposite to the first surface 24. The first air inlet 21, the second air inlet 22 and the second air outlet 29 are all located on the first surface 24, and the first air outlet 28 and the third air inlet 23 are all located on the third surface 26.

[0055] For ease of setup, the first air outlet 28 and the third air inlet 23 are connected. Alternatively, the baffle 9 of the first air outlet 28 and the baffle 9 of the third air inlet 23 can also be connected. In this design, the third surface 26 serves as the baffle 9 of both the first air outlet 28 and the third air inlet 23. In this case, the bottom of the third surface 26, which serves as the baffle 9 of both the first air outlet 28 and the third air inlet 23, is connected to the second guide rail. The third surface 26 can move within the second guide rail towards the second surface 25 or the fourth surface 27. Because the first air inlet 21 needs to be closed when air is introduced from the side, i.e., the top position needs to be sealed, the air guide plate 2 is divided into an upper air plate and a lower air plate. The feed inlet passes between the upper and lower air plates. The first air inlet 21 is located on the upper air plate, and the remaining air inlets are located on the lower air plate. When the third surface 26 needs to move, the lower air plate moves, exposing the spiral quick-freezing equipment.

[0056] When air is introduced from the side, the third side 26 will open as a whole. The airflow flows from the first air outlet 28 to the external space and then enters the internal space from the third air inlet 23. At this time, the second air outlet 29 can cover the entire lower space of the first side 24 or be set close to the bottom of the storage body 8.

[0057] When air is introduced from the top, the airflow enters the internal space through the first air inlet 21 and moves downward along the axis of the conveying system 1. At this time, the second air outlet 29 can cover the entire lower space of the first surface 24 or be set near the bottom of the storage body 8.

[0058] When the second air outlet 29 covers the entire lower space of the first surface 24, the second air outlet 29 can be connected to the second guide rail, or to the fifth guide rail, or both ends can be connected to the second guide rail and the fifth guide rail. When the second air outlet 29 is set near the bottom of the storage body 8, the second air outlet 29 is connected to the second guide rail or the fifth guide rail.

[0059] Of course, the second air inlet 22 can also be configured as a plurality of small air holes 20 arranged in an array. The structure of the third air inlet, the first air outlet 28, and the second air outlet 29 is the same as that of the second air inlet 22. The shape of the small air holes 20 is not limited and can be configured as round holes, rectangular holes, irregular holes, etc. Setting the air outlet as small air holes can make the airflow more uniform and can also enhance the rigidity of the air guide plate.

[0060] To prevent the airflow from the air source 5 blowing towards the first surface 24 from moving to both sides along the outer sides of the second surface 25 and the fourth surface 27 without entering the internal space enclosed by the air guide plate 2, guide plates for guiding airflow are provided on the partition plate 3. Two guide plates are provided, both facing the air source 5. One side of the guide plate is connected to the air guide plate 2, and the other side is connected to the side of the storage body 8. Further, the two guide plates are a first guide plate 41 and a second guide plate 42. One side of the first guide plate 41 is located at the connection between the first surface 24 and the second surface 25, and the other side is connected to one side of the storage body 8. One side of the second guide plate 42 is located at the connection between the first surface 24 and the fourth surface 27, and the other side is connected to the other side of the storage body 8. At the same time, to prevent the airflow from flowing out from the top and not entering the internal space from the first air inlet 21, the top of the guide plate is connected to the top surface of the storage body 8. To prevent the airflow from the second air outlet 29 from moving away from the air source 5, the bottom of the guide plate abuts against the bottom surface of the storage body 8.

[0061] Since the air source 5 is placed in front of the heat exchange / disinfection device 7, the airflow needs to pass over the heat exchange / disinfection device 7 to form a circulating airflow field. As a result, the space behind the heat exchange / disinfection device 7 is only used for air circulation, resulting in low space utilization. Therefore, the heat exchange / disinfection device 7 is set at the bottom of the air source 5 to increase space utilization. The heat exchange / disinfection device 7 is set below the partition.

[0062] To facilitate the airflow from the first air outlet 28 into the third air inlet 23, a circulation air outlet 31 is provided on the partition 3, and the circulation air outlet 31 is located on the partition 3 near the first air outlet 28.

[0063] A method for adjusting a spiral quick-freezing machine with multiple circulating flow fields, the method including a side-inlet circulating flow field or a top-inlet circulating flow field.

[0064] Rotate the baffle 9 of the first air inlet 21 along the first guide rail to close the first air inlet 21. The airflow from the air source 5 enters the internal space through the second air inlet 22 and flows around the circumference of the conveying system 1. After flowing through the conveying system 1 in the upper space, it flows to the external space from the first air outlet 28 and then flows to the lower space. It enters the lower space through the circulating air outlet 31 and enters the internal space from the third air inlet 23. It flows around the circumference of the conveying system 1 and after flowing through the conveying system 1 in the lower space, it finally flows to the heat exchange / disinfection device 7 from the second air outlet 29 and finally flows to the air inlet of the air source 5, forming a side-entry circulating flow field.

[0065] Rotate the baffles 9 of the second air inlet 22, the first air outlet 28, and the third air inlet 23 along the third guide rail, the second guide rail, or the fourth guide rail to close the second air inlet 22, the first air outlet 28, and the third air inlet 23. Due to the obstruction of the partition 3, the airflow from the air source 5 will move upward along the air guide plate 2, enter the internal space through the first air inlet 21, move downward along the axis of the conveying system 1, flow through the internal space, flow from the second air outlet 29 to the heat exchange / disinfection device 7, and finally flow to the air inlet of the air source 5, forming a top air intake circulation flow field.

[0066] This invention primarily involves designing a spiral quick-freezing machine with multiple circulating flow fields and its adjustment method. The second air inlet 22, the first air outlet 28, the third air inlet 23, and the second air outlet 29 work together to form a side-entry circulating flow field. The first air inlet 21 and the second air outlet 29 work together to form a top-entry circulating flow field. Simultaneously, both side-entry and top-entry flow fields are satisfied in one device. Appropriate flow fields can be selected according to different working conditions to ensure product quality. Baffles are provided to facilitate closing or opening the air outlets as needed. Guide plates are provided to allow airflow to enter the internal space from the first or second air inlet. A circulating air outlet 31 is provided to ensure the airflow circulation path.

[0067] It should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A spiral quick-freezing machine with multiple circulating flow fields, characterized in that, It includes a storage body (8), a conveying system (1) installed in the storage body (8), and an air source (5) for conveying airflow to the conveying system (1). A guide plate (2) is provided on the outside of the conveying system (1). The guide plate (2) divides the warehouse body (8) into an inner and an outer part. A partition (3) is provided on the outside of the guide plate (2). The partition (3) divides the warehouse body (8) into an upper part and a lower part. The air source (5) is provided on the partition (3). The air outlet of the air source (5) is provided on the upper part, and the air inlet of the air source (5) is provided on the lower part. The air guide plate (2) is provided with a first air inlet (21), a second air inlet (22), a third air inlet, a first air outlet (28) and a second air outlet (29). The first air inlet (21), the second air inlet (22) and the first air outlet (28) are all located above the partition plate (3). The third air inlet (23) and the second air outlet (29) are located below the partition plate (3). The first air inlet (21) is located near the top of the storage body (8) and the second air inlet (22) is located near the partition plate (3). A recirculating air vent (31) is provided on the partition (3) near the first air outlet (28); Baffles (9) are provided on the first air inlet (21), the second air inlet (22), the third air inlet (23), the first air outlet (28), and the second air outlet (29). Each baffle (9) can be opened or closed. Different circulating flow fields can be formed by operating different baffles (9) to open and close.

2. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, Guide rails (6) are provided on the storage body (8) and partition (3), and baffles (9) are all provided on the guide rails (6) and can move on the guide rails (6) to open or close the air vents.

3. The spiral quick-freezing machine with multiple circulating flow fields according to claim 2, characterized in that, The guide rail (6) includes a first guide rail, a second guide rail, a third guide rail, a fourth guide rail, and a fifth guide rail; The baffle (9) of the first air inlet (21) is connected to the first guide rail, the baffle (9) of the second air inlet (22) is connected to the third guide rail, the baffle (9) of the third air inlet (23) is connected to the second guide rail, the baffle (9) of the first air outlet (28) is connected to the fourth guide rail, and the baffle (9) of the second air outlet (29) is connected to the fifth guide rail. The first guide rail is located at the top of the storage body (8), the second guide rail is located at the bottom of the storage body (8) or below the partition (3), the third and fourth guide rails are both located on the partition (3), and the fifth guide rail is located at the bottom of the storage body (8) or below the partition (3).

4. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, The second air inlet (22) is located close to the air source (5), and the first air outlet (28) is located opposite to the second air inlet (22); The third air inlet (23) is positioned opposite to the second air outlet (29).

5. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, A guide plate for guiding airflow is provided on the partition (3). The guide plate is arranged along the axial direction of the conveying system (1). Two guide plates are provided, and the two guide plates are arranged facing the air source (5). The first air inlet (21) and the second air inlet (22) are both arranged between the two guide plates.

6. The spiral quick-freezing machine with multiple circulating flow fields according to claim 5, characterized in that, Both ends of the guide plate abut against the container body (8).

7. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, A heat exchange / disinfection device (7) is provided at the air inlet of the air source (5).

8. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, The height ratio of the upper part to the lower part of the storage body (8) is set to 2:1 or 1:

2.

9. The spiral quick-freezing machine with multiple circulating flow fields according to claim 1, characterized in that, The second air inlet (22) is configured as a plurality of small air holes (20) arranged in an array. The third air inlet (23), the first air outlet (28) and the second air outlet (29) have the same structure as the second air inlet (22).

10. A method for adjusting a spiral quick-freezing machine with multiple circulating flow fields, characterized in that, The adjustment method for the spiral quick-freezing machine with multiple circulating flow fields as described in any one of claims 1-9 includes a side air inlet flow field or a top air inlet flow field. The side-inlet circulating flow field is as follows: After closing the first air inlet (21), the airflow from the air source (5) enters the internal space through the second air inlet (22), flows along the circumference of the conveying system (1), and flows to the external space from the first air outlet (28). Then it enters the lower space through the circulation air outlet (31), enters the internal space through the third air inlet (23), and finally flows to the air inlet of the air source (5) from the second air outlet (29). The top air intake circulation flow field is as follows: The second air inlet (22), the first air outlet (28) and the third air inlet (23) are closed. The airflow from the air source (5) moves upward along the air guide plate (2), enters the internal space through the first air inlet (21), moves downward along the axis of the conveying system (1), and flows from the second air outlet (29) to the air inlet of the air source (5).

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