Air duct circulating device of instant freezer

Abstract

The utility model discloses an instant freezer air duct circulating device which comprises a workbench, a cover body installed on the surface of the workbench, a conveying assembly arranged above the workbench, a spray head arranged in the cover body and a freezing mechanism arranged above the conveying assembly. The circulating mechanism is arranged below the conveying assembly; the number of the cleaning mechanisms is two. The utility model relates to the technical field of food processing, in particular to an air duct circulating device of an instant freezer, which realizes the recycling of cold air in a cover body through the matching of a first shell, a vertical pipe, a connecting pipe, a second transverse pipe, a curved pipe, an air outlet head and an auxiliary part, and solves the problem that when an existing instant freezer works, liquid nitrogen is gasified to form a large amount of cold air, so that the cold air cannot be recycled. The cold air gradually sinks to the bottom of the cover body and flows to the outside through the openings in the two sides of the cover body, so that the problem that a part of cold air is wasted by the existing instant freezer is solved.

Description

A quick-freezing machine air duct circulation device Technical Field

[0001] This utility model relates to the field of food processing technology, specifically to a quick-freezing machine air duct circulation device. Background Technology

[0002] A quick-freezing machine freezes items to a core temperature of -18°C within a short time, quickly passing them through an ice crystal production zone (0 to -5 degrees Celsius) within 30 minutes to minimize nutrient loss and preserve the original flavor. A tunnel-type quick-freezing machine is a type of quick-freezing machine used in food processing to freeze food quickly.

[0003] When using existing quick-freezing machines, workers place food on a conveyor belt, which carries the food into the interior of the enclosure. Liquid nitrogen is sprayed onto the surface of the food, and upon contact with the food, it rapidly absorbs a large amount of heat and vaporizes, thereby removing heat from the inside and surface of the food and quick-freezing it.

[0004] However, when existing quick-freezing machines are in operation, the vaporization of liquid nitrogen will generate a large amount of cold air. According to the natural law that hot air rises and cold air sinks, this cold air will gradually sink to the bottom of the enclosure. As time goes on, the cold air will flow to the outside through the openings on both sides of the enclosure, thus causing existing quick-freezing machines to waste a portion of the cold air. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a quick-freezing machine air duct circulation device, which solves the problem that existing quick-freezing machines waste a portion of the cold air because liquid nitrogen vaporization generates a large amount of cold air during operation. This cold air gradually sinks to the bottom of the enclosure and flows to the outside through the openings on both sides of the enclosure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick-freezing machine air duct circulation device, comprising a workbench, a cover mounted on the surface of the workbench, a conveying assembly above the workbench, and nozzles inside the cover. The quick-freezing machine air duct circulation device also includes a freezing mechanism located above the conveying assembly; a circulation mechanism located below the conveying assembly; and two sets of cleaning mechanisms, both located at the bottom of the workbench. The freezing mechanism performs quick-freezing processing on food, the circulation mechanism circulates the cold air inside the cover, and the cleaning mechanism cleans frozen food debris from the surface of the conveying assembly.

[0007] Preferably, the circulation mechanism includes a first outer shell, which is fixedly connected to the inner wall of the workbench and extends to the bottom of the workbench; a riser connected to the inner wall of the first outer shell; two connecting pipes, each connected to both sides of the riser; two second horizontal pipes, each connected to the ends of the two connecting pipes that are far apart from each other; several curved pipes, each connected to the side of the two second horizontal pipes that are far apart from each other, connected to the inner wall of the cover, and extending into the interior of the cover; an air outlet connected to the end of the curved pipe; and an auxiliary part disposed below the first outer shell; wherein, cold air enters the first outer shell, enters the riser through a delivery pump, then enters the connecting pipe, then enters the second horizontal pipe, and finally enters the curved pipe, and enters the cover from the air outlet.

[0008] Preferably, the auxiliary part includes a filter screen, which is fixedly connected to the inner wall of the first housing; a vertical column is fixedly connected to the bottom of the first housing and connected to both ends of the second horizontal tube; and a support block is fixedly connected to the bottom of the first housing and the bottom of the workbench, and connected to the outer wall of the curved tube. The filter screen filters falling food scraps to prevent them from clogging the vertical tube, and the vertical column and the support block support the second horizontal tube and the curved tube, respectively.

[0009] Preferably, the cleaning mechanism includes a second housing fixedly connected to one side of the bottom of the workbench; an electric telescopic rod fixedly connected to the inner wall of the second housing by bolts; a curved block fixedly connected to the output end of the electric telescopic rod by bolts, with its bottom fitting against the inner wall of the second housing; a pulley fitting against the surface of the curved block; a horizontal column installed above the pulley; two ends of a spring respectively installed on the side of the horizontal column away from the pulley and the bottom of the workbench; a vertical rod fixedly connected to the side of the horizontal column away from the pulley, passing through the workbench and movably connected to the workbench; and a scraper fixedly connected to the top of the vertical rod. The curved block, driven by the electric telescopic rod, causes the pulley to move the horizontal column, compressing the spring, thereby causing the vertical rod to drive the scraper to fit against the surface of the conveying assembly.

[0010] Preferably, the freezing mechanism includes a vertical tube connected to the inner wall of the enclosure and extending to the bottom of the vertical tube; a first horizontal tube connected to the bottom of the vertical tube and connected to the top of the nozzle below; a support column fixedly connected to the bottom of the enclosure and connected to the end of the first horizontal tube; two sets of guide parts are provided, both located inside the enclosure; wherein, external liquid nitrogen enters the first horizontal tube through the vertical tube, the support column supports the first horizontal tube, and finally sprays it onto the surface of the food through the nozzle.

[0011] Preferably, the guide section includes an I-shaped post, which is fixedly connected to the inner wall of the cover by bolts; a guide plate is fixedly connected to the end of the I-shaped post away from the cover by bolts; wherein the food on the surface of the conveying component is guided by the I-shaped post and the guide plate.

[0012] Beneficial effects

[0013] This utility model provides an air circulation device for a quick-freezing machine. It has the following advantages: This quick-freezing machine air circulation device, through the cooperation of a first outer shell, a vertical pipe, a connecting pipe, a second horizontal pipe, a curved pipe, an air outlet, and auxiliary parts, achieves the circulation of cold air inside the enclosure, reducing the discharge of cold air and saving some cold air. It solves the problem that in existing quick-freezing machines, during operation, liquid nitrogen vaporization generates a large amount of cold air, which gradually sinks to the bottom of the enclosure and flows to the outside through openings on both sides of the enclosure, resulting in the waste of cold air.

[0014] By combining the second housing, electric telescopic rod, curved block, pulley, crossbar, spring, upright and scraper, the debris on the surface of the conveying component is cleaned, keeping the conveying component clean and solving the problem that food debris may freeze on the conveying component when quick-freezing some foods with high moisture content. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of this utility model;

[0016] Figure 2 is a schematic diagram of the appearance of this utility model;

[0017] Figure 3 is a structural schematic diagram of the workbench, conveying assembly and cover in Figure 1;

[0018] Figure 4 is an enlarged view of point A in Figure 1;

[0019] Figure 5 is a schematic diagram of the structure of the electric telescopic rod, the curved block, and the upright in Figure 3.

[0020] In the diagram: 1. Workbench; 2. Conveying assembly; 3. Cover; 4. Nozzle; 5. Refrigeration mechanism; 51. Vertical pipe; 52. First horizontal pipe; 53. Support column; 54. Guide section; 541. I-shaped column; 542. Guide plate; 6. Circulation mechanism; 61. First outer shell; 62. Vertical pipe; 63. Connecting pipe; 64. Second horizontal pipe; 65. Curved pipe; 66. Air outlet; 67. Auxiliary section; 671. Filter screen; 672. Vertical column; 673. Support block; 7. Cleaning mechanism; 71. Second outer shell; 72. Electric telescopic rod; 73. Curved block; 74. Pulley; 75. Horizontal column; 76. Spring; 77. Vertical pole; 78. Scraper. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] When existing quick-freezing machines are in operation, the vaporization of liquid nitrogen generates a large amount of cold air. This cold air gradually sinks to the bottom of the enclosure and flows to the outside through the openings on both sides of the enclosure, resulting in a waste of some cold air in existing quick-freezing machines.

[0023] In view of this, the present invention provides a quick-freezing machine air duct circulation device, which solves the problem of circulating cold air inside the enclosure by coordinating the first outer shell, vertical pipe, connecting pipe, second horizontal pipe, curved pipe, air outlet and auxiliary parts, thereby reducing the discharge of cold air and saving some cold air. It also solves the problem that in existing quick-freezing machines, liquid nitrogen vaporization generates a large amount of cold air, which gradually sinks to the bottom of the enclosure and flows to the outside through the openings on both sides of the enclosure, resulting in the waste of some cold air in existing quick-freezing machines.

[0024] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0025] Example 1: As shown in Figures 1-5, a quick-freezing machine air duct circulation device includes a workbench 1, a cover 3 mounted on the surface of the workbench 1, and a conveyor assembly 2 above the workbench 1. The conveyor assembly 2 includes a column, conveyor rollers, and a conveyor belt. The bottom of the column is fixedly connected to the surface of the workbench 1, and the inner wall of the column is rotatably connected to the conveyor rollers via bearings. There are two conveyor rollers, and a conveyor belt is rotatably connected between the two conveyor rollers. A nozzle 4 is installed inside the cover 3. The operator places food onto the conveyor belt through the rear opening of the cover 3, and the conveyor belt carries the food into the cover 3. The nozzle 4 sprays liquid nitrogen onto the surface of the food. The cover 3 provides a relatively enclosed space for quick-freezing the food. The quick-frozen food passes through the opening at the front end of the cover 3. The opening is removed from the cover 3, and the staff takes it off. The quick-freezing machine's air duct circulation device also includes a freezing mechanism 5, a circulation mechanism 6, and a cleaning mechanism 7. The freezing mechanism 5 is located above the conveying component 2; the circulation mechanism 6 is located below the conveying component 2; and there are two sets of cleaning mechanisms 7, both located at the bottom of the workbench 1. The freezing mechanism 5 is responsible for quickly cooling and freezing the food, the circulation mechanism 6 realizes the efficient circulation of cold air, and the cleaning mechanism 7 ensures the cleanliness of the conveying component 2 and avoids the accumulation of food debris that affects the performance of the equipment. Specifically, the freezing mechanism 5 performs quick-freezing processing on the food, the circulation mechanism 6 circulates the cold air inside the cover 3, and the cleaning mechanism 7 cleans the frozen food debris on the surface of the conveying component 2.

[0026] In the specific implementation process, it is worth noting that the conveying component 2 includes a column, a conveying roller, and a conveyor belt. The bottom of the column is fixedly connected to the surface of the workbench 1. The inner wall of the column is rotatably connected to the conveying roller through a bearing. There are two conveying rollers, and the conveyor belt is rotatably connected between the two conveying rollers. The operator starts the external motor of the conveying roller, thereby driving the conveyor belt to rotate. The operator places the food on the conveyor belt through the rear opening of the cover 3. The food is conveyed into the cover 3. The nozzle 4 sprays liquid nitrogen onto the surface of the food. The cover 3 provides a relatively closed space for quick freezing of the food. After quick freezing, the food is removed from the cover 3 through the opening at the front end of the cover 3. The operator takes it off. The freezing mechanism 5 is responsible for quickly cooling and freezing the food. The circulation mechanism 6 realizes the efficient circulation of cold air. The cleaning mechanism 7 ensures the cleanliness of the conveying component 2 and avoids the accumulation of food debris that affects the performance of the equipment.

[0027] Specifically, the staff places the food on the conveyor belt through the rear opening of the enclosure 3. The food enters the enclosure 3 through the conveyor belt, and the nozzle 4 sprays liquid nitrogen onto the surface of the food. The enclosure 3 provides a relatively enclosed space for quick freezing of the food. After quick freezing, the food is removed from the enclosure 3 through the front opening of the enclosure 3. The staff takes it off. The freezing mechanism 5 is responsible for rapidly cooling and freezing the food. The circulation mechanism 6 realizes the efficient circulation of cold air. The cleaning mechanism 7 ensures the cleanliness of the conveyor component 2 and avoids the accumulation of food debris that may affect the performance of the equipment.

[0028] Example 2: As shown in Figures 1-5, the circulation mechanism 6 includes a first outer shell 61, a vertical pipe 62, a connecting pipe 63, a second horizontal pipe 64, a curved pipe 65, an air outlet 66, and an auxiliary part 67. An air pump (model G2BK2468S) is installed on the surface of the vertical pipe 62. The first outer shell 61 is fixedly connected to the inner wall of the workbench 1 and extends to the bottom of the workbench 1. When food undergoes quick-freezing, cold air at the bottom of the cover 3 accumulates in the first outer shell 61. The vertical pipe 62 is connected to the inner wall of the first outer shell 61. When the operator starts the air pump on the surface of the vertical pipe 62, the cold air inside the first outer shell 61 enters the vertical pipe 62. There are two connecting pipes 63, both connected to both sides of the vertical pipe 62. The cold air exiting the vertical pipe 62 enters the connecting pipe 63. There are two second horizontal pipes 64, both connected to the two connecting pipes 65. Two connecting pipes 63 are positioned at opposite ends; two connecting pipes 63 evenly distribute cold air into the second horizontal pipes 64 on both sides; several curved pipes 65 are connected to the opposite ends of the two second horizontal pipes 64, and are connected to the inner wall of the cover 3, extending into the interior of the cover 3; the two second horizontal pipes 64 further disperse the cold air into the curved pipes 65 on both sides; an air outlet 66 is connected to the end of the curved pipe 65; finally, the cold air enters the interior of the cover 3 through the air outlet 66; after food processing is completed, the staff stops the air pump; an auxiliary part 67 is located below the first outer shell 61; the cold air enters the first outer shell 61, enters the riser 62 through the delivery pump, then enters the connecting pipe 63, then enters the second horizontal pipe 64, and finally enters the curved pipe 65, entering the cover 3 through the air outlet 66;

[0029] In the specific implementation process, it is worth noting that an air pump, model G2BK2468S, is installed on the surface of the riser 62. When food is being quick-frozen, the cold air at the bottom of the cover 3 will accumulate in the first outer shell 61. At this time, the staff will start the air pump on the surface of the riser 62, and the cold air inside the first outer shell 61 will enter the riser 62. The cold air coming out of the riser 62 will enter the connecting pipe 63. The two connecting pipes 63 will evenly distribute the cold air to the second horizontal pipes 64 on both sides. The two second horizontal pipes 64 will further disperse the cold air to the curved pipes 65 on both sides. Finally, the cold air will enter the interior of the cover 3 through the air outlet 66. When the food processing is completed, the staff will stop the air pump, so that the cold air inside the cover 3 can be recycled.

[0030] Furthermore, the auxiliary part 67 includes a filter screen 671, a vertical column 672, and a support block 673. The filter screen 671 is fixedly connected to the inner wall of the first outer casing 61. The filter screen 671 can be bolted to the inner wall of the first outer casing 61. Its aperture size is carefully designed to effectively intercept falling food debris without affecting the normal airflow. This prevents debris from entering the riser pipe 62 and causing blockage, ensuring the smooth flow of the entire circulation system. The vertical column 672 is fixedly connected to the bottom of the first outer casing 61. The vertical column 672 and the support block 673 are respectively fixedly connected to the bottom of the first outer shell 61 and the bottom of the workbench 1, and are connected to the outer wall of the curved tube 65; at the same time, the vertical column 672 and the support block 673 support the second horizontal tube 64 and the curved tube 65 respectively, improving the stability of the second horizontal tube 64 and the curved tube 65. Among them, the filter screen 671 filters the falling food scraps to prevent them from clogging the vertical tube 62, and the vertical column 672 and the support block 673 support the second horizontal tube 64 and the curved tube 65 respectively.

[0031] In the specific implementation process, it is worth noting that the filter screen 671 can be installed on the inner wall of the first outer shell 61 by bolts. Its pore size is carefully designed so that it can effectively intercept falling food debris without affecting the normal airflow. This can prevent the debris from entering the riser 62 and causing blockage, ensuring the smooth flow of the entire circulation system. At the same time, the vertical column 672 and the support block 673 support the second horizontal pipe 64 and the curved pipe 65 respectively, improving the stability of the second horizontal pipe 64 and the curved pipe 65.

[0032] Furthermore, the cleaning mechanism 7 includes a second housing 71, an electric telescopic rod 72, a curved block 73, a pulley 74, a crossbar 75, a spring 76, a vertical rod 77, and scrapers 78. There are two scrapers 78, and the total length of the two scrapers 78 is equal to the length of the conveyor belt. The scrapers 78 are made of a wear-resistant and flexible material, such as rubber or silicone. A synchronizer is installed between the two electric telescopic rods 72 to ensure that the two electric telescopic rods 72 work synchronously. The second housing 71 is fixedly connected to one side of the bottom of the workbench 1. The telescopic rod 72 is bolted to the inner wall of the second housing 71; the curved block 73 is bolted to the output end of the electric telescopic rod 72. When it is necessary to clean the frozen food debris on the surface of the conveying component 2, the operator simultaneously activates both electric telescopic rods 72. The electric telescopic rod 72 drives the curved block 73 to move, and its bottom is in contact with the inner wall of the second housing 71; the pulley 74 is in contact with the surface of the curved block 73; the curved block 73 drives the pulley 74 to move, and the pulley 74 moves on the surface of the curved block 73. The crossbar 75 is installed on the pulley 74. The pulley 74 drives the horizontal column 75 to move. The two ends of the spring 76 are respectively installed on the side of the horizontal column 75 away from the pulley 74 and at the bottom of the worktable 1. The horizontal column 75 compresses the spring 76. The upright 77 is fixedly connected to the side of the horizontal column 75 away from the pulley 74, passes through the worktable 1, and is movably connected to the worktable 1. The horizontal column 75 drives the upright 77 to move, and the upright 77 moves within the worktable 1, limiting its movement. The scraper 78 is fixedly connected to the top of the upright 77. The upright 77 drives the scraper 78 to rise, connecting with the conveyor assembly 2. After surface contact is completed, the staff stops the two electric telescopic rods 72. When the conveying component 2 rotates, the scraper 78 scrapes off the food debris on its surface and drops it onto the inclined surface at the front of the workbench 1, and finally into the collection box. After cleaning is completed, the scraper 78 is lowered back to its initial position by the elastic force of the spring 76. The curved block 73, driven by the electric telescopic rod 72, causes the pulley 74 to move the cross column 75, which compresses the spring 76, thereby causing the upright rod 77 to drive the scraper 78 to adhere to the surface of the conveying component 2.

[0033] In the specific implementation process, it is worth noting that there are two scrapers 78, and the total length of the two scrapers 78 is equal to the length of the conveyor belt. The scrapers 78 are made of a wear-resistant and flexible material, such as rubber or silicone. A synchronizer is installed between the two electric telescopic rods 72 to ensure that the two electric telescopic rods 72 work synchronously. When it is necessary to clean the frozen food debris on the surface of the conveyor assembly 2, the operator starts the two electric telescopic rods 72 at the same time. The electric telescopic rods 72 drive the curved block 73 to move, the curved block 73 drives the pulley 74 to move, the pulley 74 moves on the surface of the curved block 73, and the pulley 74 drives the crossbar 75. The horizontal column 75 compresses the spring 76, causing the horizontal column 75 to move the vertical column 77. The vertical column 77 moves within the worktable 1, limiting its position. The vertical column 77 then causes the scraper 78 to rise and contact the surface of the conveying component 2. After this, the operator stops the two electric telescopic rods 72. As the conveying component 2 rotates, the scraper 78 scrapes off the food debris from its surface, which falls onto the inclined surface at the front of the worktable 1 and finally into the collection box. Once cleaning is complete, the scraper 78 returns to its initial position due to the elasticity of the spring 76, thus cleaning the debris from the surface of the conveying component 2 and keeping the conveying component 2 clean.

[0034] Furthermore, the freezing mechanism 5 includes a vertical pipe 51, a first horizontal pipe 52, a support column 53, and a guide section 54. The vertical pipe 51 is connected to the inner wall of the enclosure 3 and extends to the bottom of the vertical pipe 51. The operator places the end of the vertical pipe 51 into an external liquid nitrogen tank, and through an external conveying device, transports the liquid nitrogen from inside the tank into the vertical pipe 51. The first horizontal pipe 52 is connected to the bottom of the vertical pipe 51 and its lower part is connected to the top of the nozzle 4. The liquid nitrogen then enters the first horizontal pipe 52 and is finally sprayed out through the nozzle 4 onto the food. The surface is quick-frozen. After processing, the staff stops the external conveying equipment and the liquid nitrogen supply. The top of the support column 53 is fixedly connected to the bottom of the cover 3 and connected to the end of the first horizontal pipe 52. The support column 53 supports the first horizontal pipe 52. Two sets of guide parts 54 are provided, both of which are located inside the cover 3. The external liquid nitrogen enters the first horizontal pipe 52 through the vertical pipe 51, the support column 53 supports the first horizontal pipe 52, and finally sprays it onto the surface of the food through the nozzle 4.

[0035] In the specific implementation process, it is worth noting that the staff puts the end of the vertical pipe 51 into the external liquid nitrogen tank, and through the external conveying equipment, the liquid nitrogen inside the liquid nitrogen tank is transported to the vertical pipe 51, and then enters the first horizontal pipe 52. Finally, it is sprayed out through the nozzle 4 and sprayed onto the surface of the food for quick freezing. After the processing is completed, the staff stops the external conveying equipment and stops the liquid nitrogen transport. The support column 53 supports the first horizontal pipe 52 to realize the quick freezing processing of the food.

[0036] Furthermore, the guide section 54 includes an I-shaped post 541 and a guide plate 542. The I-shaped post 541 is fixedly connected to the inner wall of the cover 3 by bolts. The operator rotates the bolts on both sides of the I-shaped post 541 to fix the I-shaped post 541 to the cover 3 and fixes the guide plate 542 to the I-shaped post 541. The guide plate 542 is fixedly connected to the end of the I-shaped post 541 away from the cover 3 by bolts. The guide plates 542 on both sides guide the food on the surface of the conveying component 2, so as to guide the food to move along a predetermined trajectory. The food on the surface of the conveying component 2 is guided by the I-shaped post 541 and the guide plate 542.

[0037] In the specific implementation process, it is worth noting that the staff fixes the I-shaped column 541 to the cover 3 by rotating the bolts on both sides of the I-shaped column 541, and fixes the guide plate 542 to the I-shaped column 541. The guide plates 542 on both sides guide the food on the surface of the conveying component 2, so as to guide the food to move along the predetermined trajectory.

[0038] Specifically, firstly, the worker rotates the bolts on both sides of the I-shaped column 541 to fix the I-shaped column 541 to the cover 3, and then fixes the guide plate 542 to the I-shaped column 541. Next, the worker places the end of the vertical pipe 51 into the external liquid nitrogen tank. Through an external conveying device, the liquid nitrogen inside the tank is transported to the vertical pipe 51, then into the first horizontal pipe 52, and finally sprayed onto the surface of the food through the nozzle 4 for quick freezing. The guide plates 542 on both sides guide the food on the surface of the conveying assembly 2. At this time, the cold air at the bottom of the cover 3 will accumulate in the first outer shell 61. The worker starts the air pump on the surface of the vertical pipe 62, and the cold air inside the first outer shell 61 enters the vertical pipe 62. The cold air coming out of the vertical pipe 62 enters the connecting pipe 63. The two connecting pipes 63 evenly distribute the cold air to the second horizontal pipes 64 on both sides. The two second horizontal pipes 64 further disperse the cold air into the curved pipes 65 on both sides. Finally... Cold air enters the interior of the enclosure 3 through the air outlet 66. After food processing is completed, the staff stops the air pump. When it is necessary to clean the frozen food debris on the surface of the conveying component 2, the staff simultaneously activates two electric telescopic rods 72. The electric telescopic rods 72 drive the curved block 73 to move, the curved block 73 drives the pulley 74 to move, the pulley 74 moves on the surface of the curved block 73, the pulley 74 drives the horizontal column 75 to move, the horizontal column 75 compresses the spring 76, the horizontal column 75 drives the vertical column 77 to move, the vertical column 77 moves in the workbench 1, the vertical column 77 is limited, the vertical column 77 drives the scraper 78 to rise and contact the surface of the conveying component 2. After completion, the staff stops the two electric telescopic rods 72. When the conveying component 2 rotates, the scraper 78 scrapes off the food debris on its surface and drops it onto the inclined surface at the front of the workbench 1, and finally into the collection box. After cleaning is completed, the scraper 78 returns to its initial position due to the elastic force of the spring 76.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-freezing machine air duct circulation device, comprising a workbench (1), characterized in that: The surface of the workbench (1) is equipped with a cover (3), and a conveying assembly (2) is provided above the workbench (1). A nozzle (4) is provided inside the cover (3). The quick-freezing machine air duct circulation device also includes: a freezing mechanism (5) provided above the conveying assembly (2); a circulation mechanism (6) provided below the conveying assembly (2); and a cleaning mechanism (7) provided in two sets, both of which are located at the bottom of the workbench (1). The food is quick-frozen by the freezing mechanism (5), the cold air inside the cover (3) is circulated by the circulation mechanism (6), and the food debris frozen on the surface of the conveying assembly (2) is cleaned by the cleaning mechanism (7).

2. The quick-freezing machine air duct circulation device according to claim 1, characterized in that: The circulation mechanism (6) includes: a first outer shell (61), fixedly connected to the inner wall of the workbench (1) and extending to the bottom of the workbench (1); a vertical pipe (62), connected to the inner wall of the first outer shell (61); two connecting pipes (63), each connected to both sides of the vertical pipe (62); two second horizontal pipes (64), each connected to one end of the two connecting pipes (63) that are far apart from each other; and several curved pipes (65), each connected to one end of the two second horizontal pipes (64) that are far apart from each other. One side, and connected to the inner wall of the cover (3), and extending into the interior of the cover (3); an air outlet (66), connected to the end of the curved pipe (65); an auxiliary part (67), disposed below the first outer shell (61); wherein, cold air enters the first outer shell (61), enters the riser (62) through the delivery pump, then enters the connecting pipe (63), then enters the second horizontal pipe (64), and finally enters the curved pipe (65), and enters the cover (3) from the air outlet (66).

3. The quick-freezing machine air duct circulation device according to claim 2, characterized in that: The auxiliary part (67) includes: a filter screen (671) fixedly connected to the inner wall of the first outer shell (61); a vertical column (672) fixedly connected to the bottom of the first outer shell (61) and connected to both ends of the second horizontal tube (64); and a support block (673) fixedly connected to the bottom of the first outer shell (61) and the bottom of the workbench (1) respectively, and connected to the outer wall of the curved tube (65); wherein, the filter screen (671) filters the falling food scraps to prevent them from clogging the vertical tube (62), and the vertical column (672) and the support block (673) support the second horizontal tube (64) and the curved tube (65) respectively.

4. The quick-freezing machine air duct circulation device according to claim 1, characterized in that: The cleaning mechanism (7) includes: a second housing (71) fixedly connected to one side of the bottom of the workbench (1); an electric telescopic rod (72) fixedly connected to the inner wall of the second housing (71) by bolts; a curved block (73) fixedly connected to the output end of the electric telescopic rod (72) by bolts, and its bottom is attached to the inner wall of the second housing (71); a pulley (74) attached to the surface of the curved block (73); a horizontal column (75) installed above the pulley (74); and a spring (76) with both ends installed on the horizontal column (75) away from the pulley (74). The side of the worktable (1) and the bottom of the worktable (1); the upright (77), fixedly connected to the side of the cross column (75) away from the pulley (74), and passing through the worktable (1), and movably connected to the worktable (1); the scraper (78), fixedly connected to the top of the upright (77); wherein, the curved block (73), driven by the electric telescopic rod (72), causes the pulley (74) to drive the cross column (75) to move, causing the spring (76) to compress, thereby causing the upright (77) to drive the scraper (78) to adhere to the surface of the conveying assembly (2).

5. The quick-freezing machine air duct circulation device according to claim 1, characterized in that: The freezing mechanism (5) includes: a vertical tube (51) connected to the inner wall of the cover (3) and extending to the bottom of the vertical tube (51); a first horizontal tube (52) connected to the bottom of the vertical tube (51) and connected to the top of the nozzle (4) below; a support column (53) fixedly connected to the bottom of the cover (3) at the top and connected to the end of the first horizontal tube (52); and two sets of guide parts (54) provided, both of which are located inside the cover (3); wherein, external liquid nitrogen enters the first horizontal tube (52) through the vertical tube (51), the support column (53) supports the first horizontal tube (52), and finally sprays it onto the surface of the food through the nozzle (4).

6. The quick-freezing machine air duct circulation device according to claim 5, characterized in that: The guide part (54) includes: an I-shaped post (541) which is fixedly connected to the inner wall of the cover (3) by bolts; and a guide plate (542) which is fixedly connected to the end of the I-shaped post (541) away from the cover (3) by bolts; wherein the food on the surface of the conveying assembly (2) is guided by the I-shaped post (541) and the guide plate (542).

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