Air uniformizing structure capable of enhancing air uniformizing effect in cavity of liquid nitrogen instant freezer

Abstract

The utility model discloses an air uniformizing structure capable of enhancing the air uniformizing effect in a cavity of a liquid nitrogen instant freezer. The air uniformizing structure comprises a food liquid nitrogen instant freezer body. Food conveyed through the conveying chain enters the liquid nitrogen instant freezer body, liquid nitrogen is preferentially sprayed into the liquid nitrogen vaporization layer through the liquid nitrogen spray head, and the exhaust fan sucks part of gaseous nitrogen to be discharged at the position of the feeding port in the device from the head of the tunnel and discharges the gaseous nitrogen to the liquid nitrogen vaporization layer. Mixed high-pressure gas in the liquid nitrogen vaporization layer is blown into the cold energy exchange layer at a high speed through the circulation holes, food materials in the cold energy exchange layer are evenly and quickly frozen, the effect of evenly discharging cold air of liquid nitrogen is achieved, and due to the fact that some food materials are small in size and cannot occupy too much space on the conveying chain, the food materials can be quickly and quickly frozen. And the arrangement distance of the food materials is large, at the moment, part of the circulation holes need to be blocked through the adjusting assembly, and therefore the effects that the gas exchange flow speed is increased, and the food materials are precisely frozen are achieved.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, and in particular to an air-uniform structure that can enhance the air-uniformity effect inside the cavity of a liquid nitrogen quick-freezing machine. Background Technology

[0002] In the food processing industry, quick-freezing technology has become an indispensable part of maintaining the freshness of ingredients, extending their shelf life, and locking in their original nutritional value and flavor. Especially on fast-paced modern production lines, efficient and uniform quick-freezing of ingredients is crucial. Currently, many food processing companies use liquid nitrogen as the quick-freezing medium because liquid nitrogen has an extremely low temperature (-196°C) and excellent thermal conductivity, enabling it to rapidly absorb heat from ingredients and achieve rapid freezing. Through a precisely controlled conveyor system, ingredients are systematically fed into an environment filled with liquid nitrogen, ensuring ideal quick-freezing results at every stage, thereby meeting the market demand for high-quality frozen foods.

[0003] However, current liquid nitrogen quick-freezing technology faces several challenges in practical applications. In particular, the method of directly atomizing liquid nitrogen and spraying it into the cold exchange layer using liquid nitrogen nozzles, while improving freezing efficiency to some extent, introduces new problems. Due to potential inaccuracies or response delays in the design and control system of the liquid nitrogen nozzles, it is difficult to maintain a constant liquid nitrogen flow rate, resulting in uneven heating of the food during quick-freezing. This uneven freezing not only affects the final quality of the food, leading to differences in taste, color, and even nutritional components, but may also damage the cellular structure of the food due to localized overcooling, reducing the overall value of the product. Therefore, optimizing the liquid nitrogen spraying system to achieve more precise and stable liquid nitrogen flow control has become crucial for improving food processing quality and technological levels. Utility Model Content

[0004] The purpose of this invention is to provide a uniform airflow structure that can enhance the uniform airflow effect within the cavity of a liquid nitrogen quick-freezing machine, thereby addressing the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a uniform airflow structure that enhances the uniform airflow effect within the cavity of a liquid nitrogen quick-freezing machine, comprising a food liquid nitrogen quick-freezing machine body, wherein an inlet and an outlet are respectively provided at both ends of the liquid nitrogen quick-freezing machine body, a conveyor chain is provided inside the food liquid nitrogen quick-freezing machine body, multiple liquid nitrogen nozzles are fixedly installed on the top wall inside the food liquid nitrogen quick-freezing machine body, a partition plate frame is provided below the multiple liquid nitrogen nozzles, one end of the partition plate frame is fixedly connected to the top of the food liquid nitrogen quick-freezing machine body, the partition plate frame divides the interior of the food liquid nitrogen quick-freezing machine body into a liquid nitrogen vaporization layer and a cold exchange layer, multiple flow holes are provided on the partition plate frame, the multiple flow holes realize the interconnection between the liquid nitrogen vaporization layer and the cold exchange layer, an exhaust fan is fixedly installed at one end of the partition plate frame, the exhaust end of the exhaust fan is located near the inlet, and an adjustment component is provided on the partition plate frame.

[0006] As a further description of the above technical solution: the adjustment component includes multiple fixing blocks, which are respectively disposed on both sides of multiple flow holes. Each of the multiple fixing blocks has a sliding groove on its side wall. Multiple sealing plates are disposed above the partition plate frame. The initial position of the multiple sealing plates is disposed on one side of the flow hole. The multiple sealing plates are slidably connected to the multiple fixing blocks through the sliding grooves. A heating component is disposed inside the multiple fixing blocks.

[0007] As a further description of the above technical solution: a connecting plate is fixedly connected between the plurality of sealing plates, and a driving component is provided at one end of the connecting plate.

[0008] As a further description of the above technical solution: the driving component includes a groove formed at the top of the partition plate frame, a cylinder is fixedly installed inside the groove, a slider is drivenly connected to the output end of the cylinder, the slider is slidably connected to the groove, and the slider is fixedly connected to one end of the connecting plate.

[0009] As a further description of the above technical solution: a sealing cover is provided above the groove, the sealing cover is fixedly connected to the partition plate frame, and the connecting plate passes through one side of the sealing cover and is slidably connected to the sealing cover.

[0010] As a further description of the above technical solution: the heating assembly includes a heating power supply and wires disposed at both ends of the heating power supply. The heating power supply is fixedly installed inside the partition plate frame. A negative electrode plate is disposed inside the sliding groove of one row of the fixed blocks, and a positive electrode plate is disposed inside the sliding groove of the other row of the fixed blocks. The positive electrode plate and the negative electrode plate are electrically connected to the positive and negative terminals of the heating power supply respectively through wires.

[0011] As a further description of the above technical solution: the opening direction of the flow hole is inclined towards one end of the tunnel inlet.

[0012] As a further description of the above technical solution: the surface of the sealing cover is provided with a heat insulation layer.

[0013] This invention provides a uniform airflow structure that enhances the uniform airflow effect within the cavity of a liquid nitrogen quick-freezing machine. It offers the following advantages: Food transported by a conveyor chain enters the liquid nitrogen quick-freezing machine. Liquid nitrogen is preferentially sprayed into the liquid nitrogen vaporization layer via a liquid nitrogen nozzle. A blower draws in a portion of the gaseous nitrogen to be discharged from the inlet through the tunnel head and discharges it into the liquid nitrogen vaporization layer. The mixed high-pressure gas within the liquid nitrogen vaporization layer is then blown at high speed into the cold exchange layer through flow holes, achieving uniform quick-freezing of the food within the cold exchange layer. This achieves the effect of uniformly discharging the cold liquid nitrogen. Considering that some food items are small and do not occupy much space on the conveyor chain, and that the spacing between food items is relatively large, it is necessary to use an adjustment component to partially block the flow holes, thereby accelerating the gas exchange flow rate and achieving precise freezing of the food.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an air-uniformation structure that can enhance the air-uniformation effect inside the cavity of a liquid nitrogen quick-freezing machine, as proposed in this utility model.

[0017] Figure 2 This is a top view of the partition frame of this utility model;

[0018] Figure 3 A three-dimensional structural diagram of the partition frame of this utility model with an adjustment component provided;

[0019] Figure 4 This is a top view of the adjustment component of this utility model when it blocks a local flow hole;

[0020] Figure 5 This is a three-dimensional exploded view of the structure between the adjustment component and the partition frame of this utility model;

[0021] Figure 6 For the present utility model Figure 5 A magnified structural diagram at point A;

[0022] Figure 7 A cross-sectional view of the groove of the fixing block of this utility model, which has positive and negative poles inside;

[0023] Figure 8 This is a cross-sectional view of the present invention, showing that a heating power supply is installed inside the partition frame.

[0024] Figure 9 This is a cross-sectional view of the present invention with a heat insulation layer provided on the sealing cap.

[0025] Legend:

[0026] 1. Body of the liquid nitrogen quick-freezing machine; 2. Conveyor chain; 3. Divider frame; 4. Liquid nitrogen vaporization layer; 5. Cold exchange layer; 6. Liquid nitrogen nozzle; 7. Flow hole; 8. Exhaust fan; 9. Fixing block; 10. Sealing plate; 11. Connecting plate; 12. Sealing cover; 13. Groove; 14. Cylinder; 15. Sliding block; 16. Slide groove; 17. Positive electrode plate; 18. Negative electrode plate; 19. Heating power supply; 20. Wire; 21. Feed inlet; 22. Discharge outlet; 23. Insulation layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figure 1-9A uniform airflow structure for enhancing the uniform airflow effect within a liquid nitrogen freezer cavity includes a liquid nitrogen freezer body 1. The freezer body has an inlet 21 and an outlet 22 at both ends. A conveyor chain 2 is installed inside the freezer body 1. Multiple liquid nitrogen nozzles 6 are fixedly installed on the top wall inside the freezer body 1. A partition frame 3 is located below the multiple liquid nitrogen nozzles 6. One end of the partition frame 3 is fixedly connected to the top of the freezer body 1. The partition frame 3 divides the interior of the freezer body 1 into a liquid nitrogen vaporization layer 4 and a cold exchange layer 5. Multiple flow holes 7 are provided on the partition frame 3, allowing communication between the liquid nitrogen vaporization layer 4 and the cold exchange layer 5. An exhaust fan 8 is fixedly installed at one end of the partition frame 3. The exhaust end is located near the feed inlet 21, and the partition frame 3 is equipped with an adjustment component. Food transported by the conveyor chain 2 enters the interior of the liquid nitrogen quick-freezing machine. Liquid nitrogen is preferentially sprayed into the liquid nitrogen vaporization layer 4 by the liquid nitrogen nozzle 6. The exhaust fan 8 draws in some of the gaseous nitrogen to be discharged from the feed inlet 21 inside the device from the tunnel head and discharges it into the liquid nitrogen vaporization layer 4. The mixed high-pressure gas in the liquid nitrogen vaporization layer 4 is blown into the cold exchange layer 5 at high speed through the flow hole 7, so as to achieve uniform quick-freezing of the food inside the cold exchange layer 5 and achieve the effect of uniform discharge of the cold gas of liquid nitrogen. Considering that some food is small in size and does not take up much space on the conveyor chain 2, and the spacing between the food is large, it is necessary to block some of the flow holes 7 by adjusting the component, so as to accelerate the gas exchange flow rate and achieve the effect of precise freezing of the food.

[0029] As a preferred embodiment, the adjustment component includes multiple fixing blocks 9, which are respectively disposed on both sides of multiple flow holes 7. Each of the fixing blocks 9 has a sliding groove 16 on its sidewall. Multiple sealing plates 10 are disposed above the partition plate frame 3. The initial position of the sealing plates 10 is set on one side of the flow holes 7. The sealing plates 10 are slidably connected to the fixing blocks 9 through the sliding grooves 16. A heating component is disposed inside the fixing blocks 9. By sliding the sealing plates 10 inside the sliding grooves 16, the effect of sealing multiple rows of flow holes 7 can be achieved, while retaining some flow holes 7, thereby achieving the effect of precise freezing of the corresponding position of the food. The heating component can appropriately heat the sealing plates 10 to prevent the sealing plates 10 from being frozen and unable to slide inside the sliding grooves 16. The sealing plates 10 are made of metal, preferably aluminum plates.

[0030] As a preferred technical solution of this embodiment, a connecting plate 11 is fixedly connected between the plurality of sealing plates 10, and a driving component is provided at one end of the connecting plate 11; the driving component moves the connecting plate 11, and the connecting plate 11 can simultaneously drive the plurality of sealing plates 10 to seal the flow hole 7.

[0031] As a preferred technical solution of this embodiment, the driving component includes a groove 13 formed at the top of the partition plate frame 3. A cylinder 14 is fixedly installed inside the groove 13. A slider 15 is drivenly connected to the output end of the cylinder 14. The slider 15 is slidably connected to the groove 13 and fixedly connected to one end of the connecting plate 11. The cylinder 14 can control the sliding of the slider 15, thereby further realizing the sliding of the connecting plate 11, and thus controlling the sliding of multiple sealing plates 10.

[0032] As a preferred technical solution of this embodiment, a sealing cover 12 is provided above the groove 13. The sealing cover 12 is fixedly connected to the partition plate frame 3. The connecting plate 11 passes through one side of the sealing cover 12 and is slidably connected to the sealing cover 12. The sealing cover 12 can protect the groove 13 and prevent the liquid nitrogen low temperature from affecting the slider 15 and cylinder 14 inside.

[0033] As a preferred embodiment, the heating assembly includes a heating power supply 19 and wires 20 disposed at both ends of the heating power supply 19. The heating power supply 19 is fixedly installed inside the partition plate frame 3. One row of the sliding grooves 16 of the fixing blocks 9 is provided with negative electrode plates 18, and another row of the sliding grooves 16 of the fixing blocks 9 is provided with positive electrode plates 17. The positive electrode plates 17 and negative electrode plates 18 are electrically connected to the positive and negative terminals of the heating power supply 19 respectively through the wires 20. When the transported food does not require so many flow holes 7, when multiple sealing plates 10 are slid above the corresponding flow holes 7, the two ends of the sealing plates 10 are connected to the positive and negative terminals of the heating power supply 19. The sealing plates 10 are made of metal, preferably aluminum plates, so the sealing plates 10 can generate heat at this time, preventing them from freezing inside the sliding grooves 16 and being unable to slide. It is worth mentioning that the output power of the heating power supply 19 is low, so the heat generated by the sealing plates 10 is only enough to prevent them from freezing, so it will not affect the freezing of the food.

[0034] As a preferred technical solution in this embodiment, the opening direction of the flow hole 7 is inclined towards one end of the tunnel inlet 21; the opening direction of the flow hole 7 and the material inclination at the tunnel inlet 21 can form convection with the material direction and enhance the flow speed of the internal cold air.

[0035] As a preferred technical solution in this embodiment, the surface of the sealing cover 12 is provided with a heat insulation layer 23; the heat insulation layer 23 can insulate against the external temperature, further increasing the protective performance of the sealing cover 12.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A uniform airflow structure that enhances the uniform airflow effect within the cavity of a liquid nitrogen freezer, comprising a liquid nitrogen freezer body (1), wherein an inlet (21) and an outlet (22) are respectively provided at both ends of the liquid nitrogen freezer body, a conveyor chain (2) is provided inside the liquid nitrogen freezer body (1), and a plurality of liquid nitrogen nozzles (6) are fixedly installed on the top wall inside the liquid nitrogen freezer body (1), characterized in that, A partition frame (3) is provided below the multiple liquid nitrogen nozzles (6). One end of the partition frame (3) is fixedly connected to the top of the food liquid nitrogen quick-freezing machine body (1). The partition frame (3) divides the interior of the food liquid nitrogen quick-freezing machine body (1) into a liquid nitrogen vaporization layer (4) and a cold exchange layer (5). Multiple flow holes (7) are provided on the partition frame (3). The multiple flow holes (7) realize the mutual communication between the liquid nitrogen vaporization layer (4) and the cold exchange layer (5). A blower (8) is fixedly installed on one end of the partition frame (3). The blower end of the blower (8) is located at the end near the feed inlet (21). An adjustment component is provided on the partition frame (3).

2. The air-uniform structure for enhancing the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine according to claim 1, characterized in that, The adjustment assembly includes multiple fixing blocks (9), which are respectively disposed on both sides of multiple flow holes (7). Each of the multiple fixing blocks (9) has a sliding groove (16) on its sidewall. Multiple sealing plates (10) are disposed above the partition plate frame (3). The initial position of the multiple sealing plates (10) is disposed on one side of the flow hole (7). The multiple sealing plates (10) are slidably connected to the multiple fixing blocks (9) through the sliding groove (16). A heating assembly is disposed inside the multiple fixing blocks (9).

3. The air-uniform structure for enhancing the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine according to claim 2, characterized in that, A connecting plate (11) is fixedly connected between the plurality of sealing plates (10), and a driving component is provided at one end of the connecting plate (11).

4. The air-uniform structure according to claim 3, which enhances the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine, is characterized in that... The drive assembly includes a groove (13) formed at the top of the partition plate frame (3). A cylinder (14) is fixedly installed inside the groove (13). A slider (15) is driven to the output end of the cylinder (14). The slider (15) is slidably connected to the groove (13). The slider (15) is fixedly connected to one end of the connecting plate (11).

5. The air-uniform structure according to claim 4, which enhances the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine, is characterized in that... A sealing cover (12) is provided above the groove (13). The sealing cover (12) is fixedly connected to the partition plate frame (3). The connecting plate (11) passes through one side of the sealing cover (12) and is slidably connected to the sealing cover (12).

6. The air-uniform structure for enhancing the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine according to claim 2, characterized in that, The heating assembly includes a heating power supply (19) and wires (20) disposed at both ends of the heating power supply (19). The heating power supply (19) is fixedly installed inside the partition frame (3). A negative electrode plate (18) is disposed inside the sliding groove (16) of one row of the fixing blocks (9), and a positive electrode plate (17) is disposed inside the sliding groove (16) of the other row of the fixing blocks (9). The positive electrode plate (17) and the negative electrode plate (18) are electrically connected to the positive and negative terminals of the heating power supply (19) respectively through the wires (20).

7. The air-uniformity structure according to claim 1, which enhances the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine, is characterized in that... The opening direction of the flow hole (7) is inclined toward one end of the tunnel inlet (21).

8. The air-uniform structure according to claim 5, which enhances the air-uniformity effect within the cavity of a liquid nitrogen quick-freezing machine, is characterized in that... The surface of the sealing cap (12) is provided with a heat insulation layer (23).

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